JP3867991B1 - Non-reciprocal circuit device, communication device using the same, and non-reciprocal circuit device assembly method - Google Patents

Abstract

Provided is a nonreciprocal circuit device having excellent nonreciprocal circuit characteristics and capable of reducing costs.
In a nonreciprocal circuit device according to the present invention, a magnetic rotor assembly 1 is housed in a holder. The holder has a case portion 3 and a lid portion 4. The side walls 31 to 33 of the case portion 3 rise from the peripheral edge of the bottom surface 34 at intervals, and have a recess 36 on the edge of the rising portion. The side walls 41 to 43 of the lid portion 4 fall from the peripheral edge of the lid surface 34 with a space therebetween, and have a convex portion 46 on the edge of the falling portion. The lid portion 4 is combined with the case portion 3 with a convex portion 46 fitted into the concave portion 36. In this fitted state, the end surface 461 of the convex portion 46 and the inner surface 361 of the concave portion 36 are pressed against each other at a point P, and the gap G is between the end surface 462 of the convex portion 46 and the inner surface 362 of the concave portion 36. Has occurred.
[Selection] Figure 1

Description

  The present invention relates to a nonreciprocal circuit element, a communication device using the same, and a method for assembling the nonreciprocal circuit element.

  In recent years, the frequency of non-reciprocal circuit elements used for mobile communication is rapidly increasing from 2 GHz to 5 GHz. In general, when the frequency is increased, the DC magnetic field applied to the magnetic rotor can be reduced, so that the shape of the magnetic rotor assembly including the permanent magnet, the magnetic pole plate, and the magnetic rotor is reduced. In addition, the structure of the holder for storing the magnetic rotor assembly can be simplified.

  However, even if it can be simplified, there are limits. For example, in this type of non-reciprocal circuit element, in a configuration in which the magnetic rotor assembly is housed inside a holder formed by mechanical coupling between the case portion and the lid portion, the case portion and the lid If the coupling strength with the part is insufficient, the storage posture of the magnetic rotor assembly becomes unstable immediately, and the reproducibility of the irreversible circuit characteristics decreases.

  In addition, if the coupling strength between the case portion and the lid portion is insufficient, a problem arises in the reliability of the non-reciprocal circuit element, for example, frequent accidents of dropping off the lid portion.

  On the other hand, when a complicated fitting mechanism is employed to secure the coupling strength between the case portion and the lid portion, the number of manufacturing steps increases by the amount of the fitting mechanism, resulting in an increase in cost. The assembly man-hours increase by the amount, and the assembly yield decreases.

  Further, when the number of assembling steps of the holder increases, there is a higher risk that the nonreciprocal circuit characteristics will be reduced accordingly. For example, in the step of assembling the lid portion to the case portion, a magnetic rotor assembly is usually stored in the case portion in advance. Therefore, if it takes time to assemble the lid portion, a position shift occurs in the magnetic rotor assembly housed in the case portion, and there is a high risk that the non-reciprocal circuit characteristics will deteriorate due to this position shift. In particular, when the magnetic rotor assembly is reduced in size and weight as the frequency increases, the problem of characteristic deterioration due to this positional deviation is important.

  Specifically, with regard to the related art related to this type of non-reciprocal circuit element, for example, in the holder described in Patent Document 1, a curved portion such as a tray is provided in the surface of the lid portion combined with the case portion. Yes. The curved portion protrudes toward the storage space, and the distance from the bottom surface of the case portion to the curved portion is smaller than the thickness of the magnetic rotor assembly. According to this configuration, when the magnetic rotor assembly is housed inside the holder, a pressing force is applied to the magnetic rotor assembly toward the bottom surface of the case portion by the spring back of the curved portion.

  However, in Patent Document 1, there is a problem in reproducibility and reliability of non-reciprocal circuit characteristics because the springback effect of the curved portion is likely to vary. In addition, since the distance from the bottom surface of the case portion to the curved portion is constant, it cannot follow the change in the thickness dimension of the magnetic rotor assembly. That is, in this type of nonreciprocal circuit element, the thickness of the magnetic rotor assembly varies from product to product in accordance with the desired nonreciprocal circuit characteristics. The holder of Patent Document 1 cannot follow such a change in the thickness dimension of the magnetic rotor assembly, and requires a holder having a different thickness dimension for each product, resulting in an increase in cost. Become. Further, since the curved portion is provided, it is disadvantageous in terms of reducing the height.

  On the other hand, in the holder described in Patent Document 2, a flare slot is provided in the case portion, and the fixed teeth of the lid portion are engaged with the flare slot so that both are coupled.

However, in Patent Document 2, the coupling strength between the two cannot be ensured in the long term under the usage environment of the nonreciprocal circuit element in which vibration, heat, etc. exist. Moreover, since the fixed teeth of the lid part are rotationally fitted to the flare slot of the case part, the magnetic rotor assembly in the case part comes into contact with the rotating lid part during assembly of the lid part, There is an extremely high risk of misalignment.
USP 6,337,607B1 specification USP6,504,445B1 specification

  An object of the present invention is to provide a nonreciprocal circuit element capable of improving nonreciprocal circuit characteristics and reliability by providing a mechanically strong coupling structure to a holder for housing a magnetic rotor assembly, It is to provide a communication device using the same and a method for assembling a non-reciprocal circuit device.

  Another object of the present invention is to reduce the cost by providing the holder for housing the magnetic rotor assembly with a structure capable of following the change in the thickness dimension of the magnetic rotor assembly. A reversible circuit element, a communication device using the same, and a nonreciprocal circuit element assembling method.

  Still another object of the present invention is to provide a non-reciprocal circuit element that can improve the assembly yield and reduce the cost, a communication device using the same, and a method for assembling the non-reciprocal circuit element. is there.

  In order to solve the above-described problem, a nonreciprocal circuit device according to the present invention includes a holder and a magnetic rotor assembly.

  The holder has a case part and a lid part. The case portion has a plurality of side walls and a bottom surface, and each of the plurality of side walls rises from the periphery of the bottom surface with a space therebetween, and has a recess on the edge in the width direction of the rising portion. is doing. The lid portion has a plurality of side walls and a lid surface, and each of the plurality of side walls falls from the peripheral edge of the lid surface at a distance from each other, and extends to the edge in the width direction of the falling portion. Has a convex part.

  The lid part is combined with the case part with the convex part fitted into the concave part. In the fitting state between the convex portion and the concave portion, at least a part of the end surface on the lid portion side is in pressure contact with the inner surface of the concave portion facing the convex portion, and the end surface on the case portion side, There is a gap between the inner surfaces of the concavities facing each other. The magnetic rotor assembly is housed between the lid surface and the bottom surface of the holder.

  The nonreciprocal circuit device according to the present invention is characterized in that a device is added to the structure of the holder for housing the magnetic rotor assembly. That is, in the holder constituting the non-reciprocal circuit device according to the present invention, the cover part is combined with the case part with the convex part fitted into the concave part, and the fitting state between the convex part and the concave part In the projection, at least a part of the end surface on the lid side is in pressure contact with the inner surface of the recess facing the projection. According to this configuration, the mechanical coupling strength between the lid portion and the case portion is ensured, and the magnetic rotor assembly can be reliably stored between the lid surface and the bottom surface.

  Moreover, since at least one part of the end surface by the side of a cover part press-contacts the convex part to the inner surface of the recessed part which faces this, the adhesiveness between a cover part and a case part improves. Therefore, when the holder is used as a yoke, the reliability of electrical connection between the two is improved.

  On the other hand, in the fitting state of the convex portion and the concave portion, there is a gap between the end surface of the convex portion on the case portion side and the inner surface of the concave portion facing this. From this description, it can be seen that the pressing force is applied to the lid from the magnetic rotor assembly housed in the holder. Here, since the lid portion is firmly coupled to the case portion, the magnetic rotation is repulsively applied to the magnetic rotor assembly using the pressing force from the magnetic rotor assembly. The gap between the members constituting the child assembly is crushed, and the reproducibility of the intended irreversible circuit characteristics can be improved. Further, by applying a pressing force to the magnetic rotor assembly, the storage posture of the magnetic rotor assembly in the holder is stabilized, and the variation in characteristics is reduced.

  In the nonreciprocal circuit device according to the present invention, the case portion constituting the holder may have a plurality of recesses. The plurality of recesses are arranged at intervals in the rising direction of the side wall. According to this structure, the thickness dimension of a holder and capacity | capacitance adjustment can be performed by selecting the attachment position of a convex part from several recessed parts. Therefore, the same holder can be used for the product group of magnetic rotor assemblies having different thickness dimensions, and the use of parts can be made more efficient.

  Furthermore, in the nonreciprocal circuit device according to the present invention, the lid portion may have a plurality of convex portions. The plurality of convex portions are arranged at intervals in the thickness direction, and each is fitted in the concave portion. According to this configuration, it is possible to improve the bonding strength between the lid portion and the case portion in the holder, and to control the pressing force applied from the lid portion to the magnetic rotor assembly to improve nonreciprocal circuit characteristics. Can be achieved.

  In the assembling method of the non-reciprocal circuit device according to the present invention, after positioning the lid portion and the case portion together, the convex portion is fitted into the concave portion, and the lid portion and the case portion are mechanically coupled.

  According to the assembly method described above, all the advantages of the non-reciprocal circuit device according to the present invention can be obtained, and the disadvantage that the magnetic rotor assembly housed in the holder is displaced in the fitting process can be avoided. it can. Therefore, the reproducibility of the non-reciprocal circuit characteristics can be improved, and variations among products can be avoided.

  Other objects, configurations and advantages of the present invention will be described in more detail with reference to the accompanying drawings. The accompanying drawings are merely examples.

As described above, according to the present invention, the following effects can be obtained.
(1) A nonreciprocal circuit element capable of improving reproducibility and reliability of nonreciprocal circuit characteristics by providing a mechanically strong coupling structure to a holder for housing a magnetic rotor assembly, It is possible to provide a communication device using the same and a method for assembling the nonreciprocal circuit device.
(2) A non-reciprocal circuit device capable of reducing costs by providing a holder for housing the magnetic rotor assembly with a structure capable of following a change in the thickness dimension of the magnetic rotor assembly. It is possible to provide a communication device used and a method for assembling the nonreciprocal circuit device.
(3) It is possible to provide a nonreciprocal circuit element that can improve the assembly yield and reduce the cost, a communication device using the nonreciprocal circuit element, and a nonreciprocal circuit element assembling method.

  1 is a perspective view of a non-reciprocal circuit device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing the internal structure of the non-reciprocal circuit device shown in FIG. 1, and FIG. It is sectional drawing which shows typically the internal structure of a nonreciprocal circuit element. FIG. 4 is an enlarged view showing a part of the non-reciprocal circuit device shown in FIG. 1 (the coupling portion between the lid portion and the case portion).

  The non-reciprocal circuit device shown in FIGS. 1 to 4 is a configuration example of a distributed constant circulator used in mobile communication devices such as mobile phones and wireless devices, and communication devices used in the base station. The magnetic rotor assembly 1 is shown. The magnetic rotor assembly 1 includes a permanent magnet 11, a shield 12, an upper magnetic pole plate 13, a magnetic rotor 10, and a lower magnetic pole plate 17, which are stacked in the order described above. Are integrated by a conductive bonding agent or the like (not shown). Hereinafter, each component of the magnetic rotor assembly 1 will be specifically described.

  The shield 12 is composed of a conductor plate obtained by punching a copper plate having a thickness of about 0.1 to 0.2 mm, and is used for strengthening and stabilizing the ground electrode. The shield 12 shown in FIGS. 1 to 3 has a disk shape with a plate surface diameter of several tens of millimeters, and is set to a size that is substantially the same as the lower surface of the permanent magnet 11.

  The permanent magnet 11 is a cylindrical body having a plate surface diameter of several tens of millimeters. The permanent magnet 11 is placed on the shield 12 and applies a magnetic field to the magnetic rotor 10 disposed with the shield 12 interposed therebetween.

  The upper magnetic pole plate 13 is composed of a conductor plate obtained by punching an iron plate having a thickness of about 0.1 to 0.3 mm, and is formed in a disk shape having a diameter of several tens of millimeters. The lower magnetic pole plate 17 is composed of a conductor plate obtained by punching an iron plate having a thickness of about 0.3 to 1.0 mm, and is formed in a disc shape having a diameter of several tens of millimeters. The upper magnetic pole plate 13 and the lower magnetic pole plate 17 are used for uniformizing and stabilizing the DC magnetic field.

  The magnetic rotor 10 further includes an upper ferrite substrate 14, a central conductor 15, and a lower ferrite substrate 16, which are stacked in the order described above, and preferably integrated by a conductive adhesive or the like (not shown). ing.

  The upper ferrite substrate 14 is preferably made of a soft magnetic material such as yttrium / iron / garnet (YIG), and is formed in a disk shape having a diameter of several tens of millimeters and a thickness of about 1.0 mm. The lower ferrite substrate 16 is preferably made of a soft magnetic material such as yttrium / iron / garnet (YIG), and is formed in a disk shape having a diameter of several tens of millimeters and a thickness of about 1.0 mm.

  The center conductor 15 is preferably a conductor plate obtained by processing a copper plate having a thickness of about 0.3 to 1.0 mm, and includes a base portion 150 and first to third protrusions provided on the outer periphery of the base portion 150. It has lead terminals 151-153. The base portion 150 is formed in a circular shape having a diameter of several tens of millimeters, and has a size approximately the same as the plate surfaces of the upper ferrite substrate 14 and the lower ferrite substrate 16. The first to third lead terminals 151 to 153 protrude from the base portion 150 and are bent near the upper surface edge of the lower ferrite substrate 16.

  The nonreciprocal circuit device according to the present invention is characterized in that a device is added to the structure of the holder for holding the magnetic rotor assembly 1 described above. Specifically, the holder shown in FIGS. 1 to 4 has a case portion 3 and a lid portion 4.

  The case part 3 is a bottomed substantially cylindrical body or a substantially container-like body, and has a space 30 for accommodating the magnetic rotor assembly 1 therein. That is, the shape of the case portion 3 is determined on the premise of the shape of the magnetic rotor assembly 1 to be accommodated. In addition to the substantially cylindrical shape shown in the drawing, the shape of the case portion 3 is a substantially rectangular tube shape, or a substantially polygonal shape. A cylindrical shape may be sufficient. Furthermore, the case part 3 can be made to function as a yoke with respect to the magnetic rotor assembly 1 accommodated in the storage space 30 by preferably comprising a magnetic metal material such as iron.

  Next, the case part 3 is demonstrated concretely. The case part 3 has a storage space 30 defined by a plurality of (three in the embodiment) side walls 31 to 33 and a bottom surface 34. Each of the side walls 31 to 33 rises from the peripheral edge of the bottom surface 34 in the thickness direction H with a space from each other, and the tip end portion of the rising edge is an open end surface 35.

  Each of the side walls 31 to 33 has a first recess 36 and a second recess 37 on the rising edge at both ends in the width direction orthogonal to the thickness direction H.

  The first recess 36 has an opening on the edge, and preferably has a notch shape penetrating from the outer surface of the side walls 31 to 33 to the inner surface. In this notch shape, each of the inner surfaces 361 and 362 facing the thickness direction H extends perpendicular to the thickness direction H. The first recess 36 does not necessarily have a penetrating structure, and may be a concave step having a bottom surface.

  Further, the first recess 36 is disposed from the open end surface 35 in the thickness direction H with a space T1. That is, in the first recess 36, a wall thickness portion corresponding to the interval T1 is secured on the inner surface 361 side. Moreover, it is preferable that the 1st recessed part 36 provided in the adjacent side walls 31-33 is arrange | positioned in the same position seeing in the thickness direction H with the 1st recessed part 36 which faces each other.

  The second recess 37 can have the same structure as the first recess 36. Hereinafter, in brief, the second recess 37 has an opening on the edge, and has a notch shape penetrating from the outer surface of the side walls 31 to 33 to the inner surface. In this notch shape, each of the inner surfaces 371 and 372 facing the thickness direction H extends perpendicular to the thickness direction H.

  Further, the second recess 37 is disposed at a distance T <b> 1 in the thickness direction H from the inner surface 362 of the first recess 36. That is, in the second concave portion 37, a wall thickness portion corresponding to the interval T <b> 1 is secured between the inner surface 371 and the inner surface 362 on the inner surface 371 side. Moreover, it is preferable that the 2nd recessed part 37 provided in the adjacent side walls 31-33 is arrange | positioned in the same position seen in the thickness direction H with the 2nd recessed part 37 which faces each other.

  A part of the magnetic rotor assembly 1 (first to third lead terminals 151 to 153, etc.) is led out from the storage space 30 to the part where the edges of the adjacent side walls 31 to 33 face each other. An opening 38 for this purpose is formed. Referring to FIGS. 1 and 2, the case portion 3 has a coupling protrusion 340 on the bottom surface 34 side of the opening portion 38. The coupling protrusion 340 is preferably formed by extending the peripheral portion of the bottom surface 34, and protrudes from the opening 38 toward the outside (radial direction). The outer peripheral bottom surface of the bottom surface 34 is used as a mounting surface for a circuit board, for example.

  On the other hand, the lid portion 4 is a bottomed substantially cylindrical body or a substantially container-like body, and is used as a lid for closing the storage space 30 by being combined with the case portion 3. That is, the shape of the lid 4 is determined by following the shape of the case 3 from its original use. In addition to the substantially cylindrical shape shown in the drawing, the shape of the lid 4 is also substantially rectangular, and further substantially polygonal. It may be. Furthermore, the cover part 4 can be made to function as a yoke with respect to the magnetic rotor assembly 1 together with the case part 3 by preferably comprising a magnetic metal material such as iron.

  Next, the lid 4 will be specifically described. The lid part 4 has a plurality of (three in the embodiment) side walls 41 to 43 and a lid surface 44. The lid surface 44 has a passing dimension and a contour shape that can be fitted into the open end surface 35 of the case portion 3. In short, the lid surface 44 has a shape obtained by reducing the open end surface 35 once. According to this configuration, the nonreciprocal circuit element can be reduced in height by the thickness of the lid surface 44 by fitting the lid surface 44 into the open end surface 35.

  Each of the side walls 41 to 43 protrudes from the peripheral edge of the lid surface 44 with a space therebetween, and the protruding portion is bent outside the open end surface 35 and rises in the thickness direction H. Further, each of the side walls 41 to 43 has convex portions 46 at both ends in the width direction of the falling portion. The convex portion 46 rises with both end surfaces 461 and 462 as seen in the thickness direction H inclined toward the lid surface 44. That is, the convex portion 46 has a rising angle (inclination angle) that intersects the first or second concave portion 36, 37.

  Referring to the non-reciprocal circuit elements shown in FIGS. 1 to 3, the lid portion 4 is mechanically coupled to the case portion 3 by storing the convex portion 46 of the lid portion 4 in the first concave portion 36. The space 30 is closed by the lid surface 44. In other words, the holder has a closed storage space 30 between the opposing surfaces of the lid surface 44 and the bottom surface 34 by fitting the lid portion 4 and the case portion 3 together.

  Further, referring to FIG. 4, in the fitting state between the convex portion 46 and the first concave portion 36, the convex portion 46 has an end surface 461 on the lid surface 44 side of the first concave portion 36 facing this. It is in pressure contact with the inner surface 361. On the other hand, a gap G is formed between the end surface 462 on the side of the bottom surface 34 and the inner surface 362 of the first recess 36 facing the end surface 462.

  The magnetic rotor assembly 1 is stored in the storage space 30, and a pressing pressure (lower load) is applied in the direction of the bottom surface 34 by the lid surface 44 in the storage space 30.

  As described with reference to FIGS. 1 to 4, the lid portion 4 and the case portion 3 constituting the holder are at least one of the end surface 461 of the convex portion 46 and the inner surface 361 of the first concave portion 36. The parts are in pressure contact with each other. According to this configuration, the mechanical coupling strength of the holder can be ensured, and the magnetic rotor assembly 1 can be reliably stored in the storage space 30.

  Moreover, since the end surface 461 of the convex part 46 and the inner surface 361 of the 1st recessed part 36 which opposes this are mutually press-contacted, the adhesiveness between the cover part 4 and the case part 3 improves. Therefore, when the holder is used as a yoke, the reliability related to the electrical connection between the lid portion 4 and the case portion 3 is improved.

  On the other hand, in the fitting state of the convex portion 46 and the first concave portion 36, a gap G is generated between the end surface 462 of the convex portion 46 and the inner surface 362 of the first concave portion 36 facing the convex portion 46. From this description, it can be seen that a pressing pressure is applied to the lid surface 44 of the lid portion 4 from the magnetic rotor assembly 1 housed in the housing space 30. Here, since the lid portion 4 is firmly coupled to the case portion 3, the lid portion 4 is pressed against the magnetic rotor assembly 1 in a reactive (repulsive) manner using the pressing force from the magnetic rotor assembly 1. Pressure (under load) can be applied. Therefore, in the magnetic rotor assembly 1, the reproducibility of the intended nonreciprocal circuit characteristics is improved by the gap between the members being crushed by the pressing force applied in the direction from the lid surface 44 to the bottom surface 34. Further, by applying a pressing force to the magnetic rotor assembly 1, the storage posture of the magnetic rotor assembly 1 in the storage space 30 is stabilized, and variations in characteristics are reduced.

  In the fitted state between the convex portion 46 and the first concave portion 36, a wall thickness portion corresponding to the interval T1 is secured on the inner surface 361 side. According to this configuration, the pressing force from the magnetic rotor assembly 1 described above can be supported by the wall thickness portion corresponding to the interval T1. Accordingly, it is possible to avoid the inconvenience that the first concave portion 36 is deformed by the pressurization from the lid portion 4, thereby improving the mechanical coupling strength of the holder.

  Moreover, it is preferable that the 1st recessed part 36 of the adjacent side walls 31-33 is arrange | positioned so that it may mutually face in the same thickness position. According to this structure, the pressing force from the magnetic rotor assembly 1 is uniformly distributed and supported by the plurality of first recesses 36, and the uniform pressing pressure can be applied to the magnetic rotor assembly 1. it can.

  Although not shown in FIGS. 1 to 4, the second concave portion 37 can also be used for fitting with the convex portion 46, similarly to the first concave portion 36. Therefore, the fitting structure using the second recess 37 and its advantages will be described with reference to FIGS. 5 is a perspective view showing another fitting mode for the non-reciprocal circuit device shown in FIG. 1, FIG. 6 is an enlarged view of a part of the non-reciprocal circuit device shown in FIG. 5, and FIG. It is sectional drawing which shows typically the internal structure of the nonreciprocal circuit device shown in FIG. 5 to 7, the same components as those shown in FIGS. 1 to 4 are denoted by the same reference numerals.

  The nonreciprocal circuit device shown in FIGS. 5 to 7 is characterized in that the convex portion 46 of the lid portion 4 constituting the holder is fitted in the second concave portion 37.

  The second concave portion 37 is disposed at a distance T <b> 1 in the thickness direction H from the inner surface 362 of the first concave portion 36. That is, in the second concave portion 37, a wall thickness portion corresponding to the interval T <b> 1 is secured between the inner surface 371 and the inner surface 362 on the inner surface 371 side. According to this structure, since the pressing force from the magnetic rotor assembly 1 is supported by the wall thickness portion corresponding to the interval T1, the second concave portion 37 is deformed by the pressure from the lid portion 4. Can be avoided.

  As described above, in the non-reciprocal circuit device of FIGS. 1 to 7, the first and second recesses 36 and 37 are formed in the case portion 3 constituting the holder. By selecting one of the concave portions 36 and 37 as the mounting position of the convex portion 46, the thickness dimension and capacity of the storage space 30 can be adjusted to follow changes in the thickness dimension of the magnetic rotor assembly 1. it can.

  Regarding a specific example in which the thickness dimension of the magnetic rotor assembly 1 changes, for example, in the non-reciprocal circuit element of FIGS. 5 to 7, the upper magnetic pole plate 13 shown in FIGS. 1 to 4 is reduced. The magnetic rotor assembly 1 is reduced in height by the amount of the magnetic pole plate 13. When the number of the upper magnetic pole plates 13 is reduced, deterioration of nonreciprocal circuit characteristics can be avoided by using a metal magnet made of a conductive magnetic material for the permanent magnet 11 constituting the magnetic rotor assembly 1. .

  In addition, the thickness dimension of the magnetic rotor assembly 1 changes even when a ferrite magnet is used as the permanent magnet 11 or when the permanent magnet 11 is enlarged because a strong magnetic field is applied by the magnetic rotor 10 ( Increase or decrease).

  As described above, the non-reciprocal circuit element often uses the magnetic rotor assembly 1 having a different thickness for each product in accordance with desired non-reciprocal circuit characteristics. In this respect, the conventional holder cannot follow the change in the thickness dimension of the magnetic rotor assembly 1 and requires a holder having a different thickness dimension for each product, resulting in poor productivity and high cost. Was invited.

  On the other hand, in the non-reciprocal circuit elements of FIGS. 1 to 7, the thickness dimension of the storage space 30 is selected by selecting one of the first and second recesses 36 and 37 as the fitting place of the projection 46. And the capacity | capacitance can be adjusted and the thickness dimension change of the magnetic rotor assembly 1 can be tracked. Therefore, the same holder can be used for the product group of the magnetic rotor assembly 1 having different thickness dimensions, and the use of parts can be made more efficient.

  More specifically, by selecting one of the first and second concave portions 36 and 37 as the mounting position of the convex portion 46, the thickness dimension and the capacity of the storage space 30 are adjusted, thereby the lid portion. The pressing force applied to the magnetic rotor assembly 1 from 4 can be adjusted.

  Further, the effects of the nonreciprocal circuit device according to the present invention will be described from the viewpoint of the assembling method shown in FIGS. 8 to 18 are views showing a method for assembling the non-reciprocal circuit device according to the embodiment of the present invention. In FIG. 8 to FIG. 18, the same components as those shown in FIG. 1 to FIG.

  First, prior to the assembly of the non-reciprocal circuit element, the lid 4 (see FIGS. 1 to 7) constituting the holder and the steps shown in FIGS. 8 to 10 and the steps shown in FIGS. Each of the case portion 3 (see FIGS. 1 to 7) is manufactured in advance.

  About the manufacturing process of the lid, as shown in FIG. 8, after manufacturing an assembly material that punches out a magnetic metal plate such as iron having a thickness of about 0.5 to 1.5 mm and becomes a developed view of the lid, 9 and 10, the side walls 41 to 43 extending from the lid surface 44 are bent so as to fall in the thickness direction H by, for example, press working. Here, as shown in FIG. 10, both end surfaces 461 and 462 of the convex portion 46 as viewed in the thickness direction H rise in a tapered shape with a rising angle θ <b> 1 in the direction of the lid surface 44. The rising angle θ1 can be set preferably in the range of 5 ° to 20 °, and about 15 ° is most preferable.

  On the other hand, as shown in FIG. 11, for the manufacturing process of the case portion, an assembly material that is punched out of a magnetic metal plate such as iron having a thickness of about 0.5 to 1.5 mm and is in a development view state of the case portion 3 in advance. After the manufacture, as shown in FIG. 12, the side walls 31 to 33 extending from the bottom surface 34 are bent so as to rise in the thickness direction H by, for example, pressing. Here, as shown in FIG. 12, the inner surfaces 361 and 362 of the first recess 36 extend in parallel along the width direction orthogonal to the thickness direction H.

  Next, as shown in FIG. 13, the lid portion 4 and the case portion 3 obtained in the steps shown in FIGS. 8 to 12 are arranged so that the inner surface of the lid surface 44 faces the inner surface of the bottom surface 34. The lid surface 44 is fitted into the open end surface 35. Although omitted in the drawing (indicated by a one-dot chain line), the magnetic rotor assembly 1 described with reference to FIGS. 1 to 4 is stored in advance in the storage space 30 of the case portion 3. .

  Next, as shown in FIGS. 14 and 15, with the lid surface 44 fitted into the open end surface 35, the convex portion 46 is formed, for example, on the first concave portion 36 on the outer peripheral surface side of the side walls 31 to 33. Position. Further, the convex portion 46 is bent and deformed while applying the pressure F <b> 1, and is fitted into the first concave portion 36 from the outer peripheral side of the side walls 31 to 33.

  Next, in the state where the first concave portion 36 and the convex portion 46 are fitted to each other by the process shown in FIGS. 14 and 15, the lid surface 44 of the lid portion 4 is accommodated in the accommodating portion 30. A pressing force is applied in the thickness direction H by the pressing force of the magnetic rotor assembly 1 thus formed. That is, as shown in FIGS. 16 and 17, the convex portion 46 is gradually pressed and deformed by this pressing pressure, and the rising angle θ1 of the end face 461 shown in FIG. 14 reaches the rising angle θ2 shown in FIG. Decrease. For example, when the end surface 461 of the convex portion 46 is in full pressure contact with the inner surface 361 of the first concave portion 36 facing the rising angle θ2, the rising angle θ2 is substantially 0 °. On the other hand, in the convex portion 46, a gap G is generated between the end surface 462 on the bottom surface 34 side and the inner surface 362 of the first concave portion 36 facing the same.

  The fitting process between the convex portions 46 and the first concave portions 36 described with reference to FIGS. 14 to 17 is performed on all the convex portions 46 and the first concave portions 36 facing each other as shown in FIG. Thus, a non-reciprocal circuit element in which the magnetic rotor assembly 1 is disposed in the holding space 30 of the holder is obtained.

  According to the assembling method of the non-reciprocal circuit device shown in FIGS. 8 to 18, variation in characteristics can be avoided. For example, in a conventional holder in which the lid portion 4 is rotationally fitted to the case portion 3, the magnetic rotor assembly 1 housed in the case portion 3 causes friction caused by the rotational fitting operation of the lid portion 4. Rotation caused a position shift that caused a decrease in reproducibility.

  On the other hand, in the assembling method of FIGS. 8 to 18, since the convex portion 46 of the lid portion 4 and the first concave portion 36 of the case portion 3 are unevenly fitted from the outer peripheral side of the holder, the fitting step There is no misalignment of the magnetic rotor assembly 1 during the operation. Therefore, variation in characteristics can be avoided.

  The convex portion 46 of the lid portion 4 has a rising angle θ1 that intersects the first concave portion 36. According to this structure, if pressure deformation is applied in which the rising angle of the convex portion 46 decreases from θ1 to θ2 in response to the pressing force from the magnetic rotor assembly 1, the magnetic rotor reacts (repulsively). Since the pressing force (underload) for the assembly 1 is increased, it becomes easy to control the pressing pressure uniformly.

  By fitting the lid portion 4 to the case portion 3 in this way, it becomes easy to control the pressing pressure. Therefore, the thickness dimension of the magnetic rotor assembly 1 housed in the housing space 30 is made constant, for example, The capacitance value can be stabilized. Further, the distance between the permanent magnet 11 and the magnetic rotor 10 is constant, and the loss value is also stabilized.

  The assembling method described with reference to FIGS. 8 to 18 can be similarly applied to the second concave portion 37. Further, the advantages of the present invention described with reference to FIGS. 1 to 18 can be similarly achieved in a lumped constant configuration.

  FIG. 19 is a perspective view of a non-reciprocal circuit device according to another embodiment of the present invention. FIG. 20 is a perspective view of a lid used in the non-reciprocal circuit device of FIG. FIG. 21 is an enlarged view showing a part of the non-reciprocal circuit device shown in FIG. 19 to FIG. 21, the same components as those shown in FIG. 1 to FIG.

  In the nonreciprocal circuit elements of FIGS. 19 to 20, the lid portion 4 constituting the holder has a plurality of convex portions, that is, a first convex portion 46 and a second convex portion 47. is there.

  The first convex portion 46 has the same configuration as the convex portion 46 shown in FIGS. 1 to 18, and both end surfaces 461 and 462 as viewed in the thickness direction H rise in a taper shape toward the lid surface 44. ing.

  The second convex portion 47 can have the same structure as the first convex portion 46. Hereinafter, in brief, the second convex portion 47 has both end surfaces 471 and 472 rising in the thickness direction H rising in the direction of the lid surface 44.

  The 2nd convex part 47 and the 1st convex part 46 are arrange | positioned in the thickness direction H at intervals T2. That is, in the first and second convex portions 46 and 47 adjacent in the thickness direction H, a gap portion corresponding to the interval T2 is secured between the end surface 471 and the end surface 462.

  Here, regarding the fitting structure between the lid portion 4 and the case portion 3, referring to FIG. 21, the interval T2 between the adjacent first and second convex portions 46 and 47 is the same as the first and second adjacent portions. It is set to be substantially the same as or slightly wider than the interval T1 between the recesses 36 and 37 (interval T1≈interval T2). According to this configuration, since it is possible to arrange the wall thickness portion corresponding to the interval T1 in the gap portion corresponding to the interval T2, the first convex portion 46 is fitted into the first concave portion 36, and the second The convex portion 47 can be fitted into the second concave portion 37. Therefore, the mechanical coupling strength of the holder can be improved by increasing the number of fitting positions between the lid portion 4 and the case portion 3.

  Further, by increasing the number of places where the lid 4 and the case 3 are fitted, the pressing force applied from the lid 4 to the magnetic rotor assembly 1 is controlled to be constant, and the nonreciprocal circuit characteristics are improved. be able to.

  FIG. 22 and FIG. 23 are enlarged views of a part of a non-reciprocal circuit device according to still another embodiment of the present invention. 22 and 23, the same components as those shown in FIGS. 1 to 21 are denoted by the same reference numerals.

  In the nonreciprocal circuit device of FIGS. 22 and 23, unlike FIG. 21, the interval T2 between the first and second convex portions 46 and 47 adjacent to the thickness direction H is the same as that of the first direction adjacent to the thickness direction H. It is characterized in that it is smaller than the interval T1 between the first and second recesses 36 and 37 (interval T1> interval T2).

  One of the advantages of the configuration shown in FIGS. 22 and 23 is that only one of the first or second convex portions 46 and 47 is the first or second concave portion 36 due to the configuration where the interval T1> the interval T2. , 37, for example, when the first convex portion 46 is fitted into the first concave portion 36 (FIG. 22), and the second convex portion 47 is fitted into the second concave portion 37. In the case (FIG. 23), the thickness dimension difference T3 corresponding to the interval T1 to the interval T2 is generated at the position of the lid surface 44. According to this configuration, by appropriately adjusting the fitting relationship between the first and second convex portions 46 and 47 and the first and second concave portions 36 and 37, the thickness dimension and capacity of the holder can be reduced. Fine adjustment can be made within the range of the dimension difference T3, and the pressing force to the magnetic rotor assembly 1 can be adjusted.

  Although not shown, when the first convex portion 46 is fitted into the second concave portion 37, the position of the lid surface 44 is further lower than the state shown in FIG. On the other hand, when the 2nd convex part 47 is fitted to the 1st recessed part 36, the position of the cover surface 44 becomes still higher than the state shown in FIG. As described above, according to the configuration in which the lid portion 4 has a plurality of convex portions, the selection variation of the concave / convex fitting positions is diversified as the convex portions are added, and the thickness dimension and capacity of the storage space 30 are increased in a wider range. It is clear that adjustment is possible.

  The communication device according to the present invention is used, for example, as a base station, and is characterized in that the above-described nonreciprocal circuit element is used in a necessary part such as a transmission unit. Next, communication equipment using the nonreciprocal circuit device described with reference to FIGS. 1 to 23 will be described with reference to FIGS. 24 and 25 are cross-sectional views schematically showing the structure of a communication device using the nonreciprocal circuit device according to the present invention. FIG. 26 is a block diagram of a communication device using the non-reciprocal circuit device according to the present invention. 24 to FIG. 26, the same reference numerals are given to the same components as those shown in FIG. 1 to FIG.

  24 shows an example in which the nonreciprocal circuit element 9 described with reference to FIGS. 1 to 23 is surface-mounted on the circuit board 5. In other words, the circuit board 5 includes the board part 50 and the ground electrode 51.

  The ground electrode 51 is provided around the opening 38 on one surface of the substrate unit 50. The nonreciprocal circuit element 9 has a bottom outer surface of the case portion 3 fixed to one surface of the circuit board 5 with a conductive bonding agent such as solder, and a central conductor led out of the case portion 3 through the opening 38. Fifteen terminals 151 to 153 are electrically bonded to the ground electrode 51 by a conductive bonding agent. According to this configuration, it is possible to provide a communication device having all the advantages of the non-reciprocal circuit device 9 described with reference to FIGS.

  On the other hand, the communication device of FIG. 25 shows an example in which the nonreciprocal circuit element 9 described with reference to FIGS. In other words, the circuit board 5 has a holder insertion hole 52 that penetrates the board portion 50 from one surface to the other surface, and the holder insertion hole 52 has a recessed step portion 520 on the inner peripheral edge on the other surface side. have.

  The nonreciprocal circuit element 9 has a coupling protrusion protruding from the opening 38 (see FIG. 1) by first guiding the case portion 3 from the other surface side of the substrate portion 50 to the holder insertion hole 52. 340 is concavo-convexly fitted into the recessed step portion 520. Next, after the case portion 3 is assembled to the substrate portion 50, the magnetic rotor assembly is accommodated in the case portion 3, and the open end surface 35 is closed by the lid portion 4. Here, a part of the magnetic rotor assembly housed in the case portion 3 (the base electrode plate 17 in FIG. 25) is led out from the opening onto one surface of the substrate portion 50, and this lower magnetic pole The nonreciprocal circuit element 9 is mounted on the circuit board 5 by sandwiching the board portion 50 by the plate 17 and the coupling protrusion 340.

  According to the mounting example of the non-reciprocal circuit element 9 shown in FIG. 25, it is possible to realize a further reduction in height as compared with the mounting example shown in FIG. 24, and to reduce the assembly cost. Moreover, since the pressing force (lower load) is applied to the magnetic rotor assembly 1 by the lid portion 4, the nonreciprocal circuit element 9 can be firmly assembled to the circuit board 5.

  26 is provided in a base station in a mobile communication system, for example, and includes a reception circuit unit 6 and a transmission circuit unit 7, both of which are connected to a transmission / reception antenna 8. The reception circuit unit 6 includes a reception amplification circuit 61 and a reception circuit 62 that processes a received signal. The transmission circuit unit 7 includes a transmission circuit 71 that generates an audio signal, a video signal, and the like, and a power amplification circuit 72. In the communication device described above, the nonreciprocal circuit elements 91 and 92 according to the present invention are used in the circuit from the antenna 8 to the receiving circuit unit 6 and the transmitting circuit unit 7 and the output stage of the power amplifier circuit. The nonreciprocal circuit element 91 functions as a circulator, and the nonreciprocal circuit element 92 functions as an isolator having a termination resistor R0.

  Although the contents of the present invention have been specifically described above with reference to the preferred embodiments, it is obvious that those skilled in the art can take various modifications based on the basic technical idea and teachings of the present invention. It is.

1 is a perspective view of a non-reciprocal circuit device according to an embodiment of the present invention. It is a perspective view which decomposes | disassembles and shows the internal structure of the nonreciprocal circuit device shown in FIG. It is sectional drawing which shows typically the internal structure of the nonreciprocal circuit device shown in FIG. It is a figure which expands and shows a part of nonreciprocal circuit device shown in FIG. It is a perspective view which shows another fitting aspect about the nonreciprocal circuit device shown in FIG. It is a figure which expands and shows a part of nonreciprocal circuit device shown in FIG. It is sectional drawing which shows typically the internal structure of the nonreciprocal circuit device shown in FIG. It is a top view which shows the assembly method of the nonreciprocal circuit device based on one Embodiment of this invention. It is a perspective view which shows the process after the process shown in FIG. It is a front view which expands and shows a part of lid part obtained by the process shown in FIG. FIG. 11 is a plan view showing a step after the step shown in FIGS. 8 to 10. FIG. 12 is a perspective view showing a step after the step shown in FIG. 11. FIG. 13 is a plan view showing a step after the step shown in FIGS. 8 to 12. It is a figure which expands and shows a part about the process after the process shown in FIG. It is a top view of the process shown in FIG. FIG. 16 is a plan view showing a step after the step shown in FIGS. 14 and 15. FIG. 17 is a plan view of the process shown in FIG. 16. FIG. 18 is a plan view showing a step after the step shown in FIGS. 16 and 17. It is a perspective view of the nonreciprocal circuit device according to another embodiment of the present invention. It is a perspective view of the cover part used for the nonreciprocal circuit device of FIG. It is a figure which expands and shows a part of nonreciprocal circuit device shown in FIG. It is a figure which expands and shows a part about the nonreciprocal circuit device which concerns on another embodiment of this invention. It is a figure which expands and shows a part about the nonreciprocal circuit device which concerns on another embodiment of this invention. It is sectional drawing which shows typically the structure of the communication apparatus which concerns on one Embodiment of this invention. It is sectional drawing which shows typically the structure of the communication apparatus which concerns on another embodiment of this invention. It is a block diagram of the communication apparatus which concerns on another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Magnetic rotor assembly 10 Magnetic rotor 3 Case part 30 Storage space 31-33 Side wall 34 Bottom face 36, 37 1st, 2nd recessed part 38 Opening part 4 Cover part 40 Internal space 41-43 Side wall 44 Cover surface 46, 47 1st, 2nd convex part G Gap H Thickness direction

Claims (8)

A non-reciprocal circuit element including a holder and a magnetic rotor assembly,
The holder has a case portion and a lid portion,
The case portion has a plurality of side walls and a bottom surface,
Each of the plurality of side walls rises from the peripheral edge of the bottom surface at a distance from each other, and has a recess on the edge in the width direction of the rising part,
The lid portion has a plurality of side walls and a lid surface,
Each of the plurality of side walls falls from the periphery of the lid surface with a gap from each other, and has a convex portion at the edge in the width direction of the falling portion,
The lid portion is combined with the case portion, with the convex portion being fitted into the concave portion,
In the fitted state between the convex portion and the concave portion, at least a part of the end surface on the lid portion side is in pressure contact with the inner surface of the concave portion facing the convex portion, and on the case portion side. There is a gap between the end surface and the inner surface of the recess facing the end surface,
The magnetic rotor assembly is housed between the lid surface and the bottom surface in a holder.
Non-reciprocal circuit element. The non-reciprocal circuit device according to claim 1,
The magnetic rotor assembly is pressed in the direction of the bottom surface by the lid surface.
Non-reciprocal circuit element. A non-reciprocal circuit device according to claim 1 or 2,
The convex part and the concave part have different inclination angles,
Non-reciprocal circuit element. The nonreciprocal circuit device according to any one of claims 1 to 3, wherein the case portion has a plurality of recesses,
The plurality of recesses are arranged at intervals in the thickness direction.
Non-reciprocal circuit element. The non-reciprocal circuit device according to claim 4, wherein the lid portion has a plurality of convex portions,
The plurality of convex portions are arranged at intervals in the thickness direction, and each is fitted in the concave portion,
Non-reciprocal circuit element. The non-reciprocal circuit device according to claim 4, wherein the lid portion has a plurality of convex portions,
The plurality of convex portions are arranged at intervals in the thickness direction,
When the interval between the concave portions adjacent in the thickness direction is T1, and the interval between the convex portions adjacent in the thickness direction is T2,
Including a portion where T1> T2.
Non-reciprocal circuit element. A communication device including a transmission circuit unit and a nonreciprocal circuit element,
The nonreciprocal circuit element is described in any one of claims 1 to 6, and is provided in the transmission circuit unit.
Communication equipment. A method for assembling the non-reciprocal circuit device according to any one of claims 1 to 6,
After positioning the lid portion by fitting to the case portion, the convex portion is fitted into the concave portion, and the lid portion and the case portion are mechanically coupled.
A method for assembling a non-reciprocal circuit device including a process.

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