JP2018010043A - Optical transceiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical transceiver which can suppress interference with an optical connector and can use a limited space.SOLUTION: An optical transceiver according to one embodiment includes: a housing 6; a pull-tab 5 slidably attached to the housing 6; a slider 3 which works with the operation of the pull-over 5 in engagement with the housing 6 and moves straight along a removal direction; and a latch with a protrusion engaged with a cage and a shaft engaged with the slider 3, the protrusion moving up or down in conjunction with the operation of the slider 3, the housing 6 having a recess 61 containing the latch and having a shaft part engaged with a long round hole 35, the longer shaft 35b of the long round hole 35 being inclined to the removal direction, and the shaft moving in the long round hole 35 in conjunction with the straight movement of the slide 3, whereby the protrusion is moved up or down.SELECTED DRAWING: Figure 10

Description

  The present invention relates to an optical transceiver.

  Patent Document 1 describes an optical transceiver including a rectangular housing, a T-shaped crank rotatably connected to the housing, and an actuator handle extending from the crank. The crank and actuator handle constitute an unlatching mechanism that disengages the optical transceiver from the host system cage.

  When the user pulls the actuator handle while the optical transceiver is engaged with the cage, the actuator handle slides with respect to the housing and the crank rotates. Along with this rotation, the pin provided at the end of the crank on the housing side is lifted to release the engagement between the optical transceiver and the cage.

Japanese Patent Application Laid-Open No. 2014-120481

  In the optical transceiver described above, an optical connector extends from the end of the housing on the crank side. Therefore, it is assumed that the actuator handle or the crank interferes with the optical connector when the user pulls the actuator handle. In the optical transceiver described above, the crank rotates outside the housing when the actuator handle is pulled, making it difficult to use the optical transceiver in a limited space.

  An object of the present invention is to provide an optical transceiver that can suppress interference with an optical connector and can be used even in a limited space.

  An optical transceiver according to an aspect of the present invention is an optical transceiver that is inserted into a cage of a host system along a first direction, a housing that is inserted into the cage along the first direction, and a first direction relative to the housing. A pull tab that is slidably mounted along the slider, a slider that engages with the housing and moves in the first direction, moves along the first direction, a protrusion that engages with the cage, and a shaft that engages with the slider And a latch in which the protrusion moves in a second direction intersecting the first direction in conjunction with the operation of the slider, the housing has a recess for receiving the latch, and the shaft portion is formed on the slider The major axis of the ellipse is inclined with respect to the first direction, and the shaft moves within the ellipse in conjunction with the linear movement of the slider. , The protrusion moves in the second direction To.

  In one embodiment of the present invention, interference with an optical connector can be suppressed, and it can be used even in a limited space.

FIG. 1 is a perspective view of an optical transceiver according to an embodiment. FIG. 2 is a side view showing the slider, pull tab and latch in the first position. FIG. 3 is a side view showing the slider, pull tab and latch in the second position. FIG. 4 is a perspective view showing an optical receptacle, a pull tab, and a housing. FIG. 5 is a perspective view showing a slider, a pull tab, and a housing. FIG. 6A is a perspective view showing a slider. FIG. 6B is a diagram showing an oval part. FIG. 7 is a perspective view showing a slider, a housing, and a spring member. FIG. 8 is a perspective view showing the latch. FIG. 9 is a cross-sectional perspective view showing the housing, the slider, and the latch. FIG. 10 is a cross-sectional perspective view of FIG. 9 excluding the latch.

  Hereinafter, embodiments of an optical transceiver of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a perspective view of an optical transceiver 1 according to an embodiment. The optical transceiver 1 is used by being inserted into a cage of a host system. The optical transceiver 1 performs full duplex bidirectional optical communication. The configuration of the optical transceiver 1 conforms to the SFP standard. As shown in FIG. 1, the optical transceiver 1 includes a metallic transceiver body 2, a slider 3 engaged with the transceiver body 2, an optical receptacle 4 positioned at one end of the transceiver body 2, and a pull tab extending from the slider 3. 5 is provided.

  The transceiver body 2 has a rectangular parallelepiped shape. The transceiver body 2 accommodates an optical subassembly, an electronic circuit, and the like. The transceiver body 2 includes a housing 6 in which the slider 3 is assembled and a lid portion 7 that seals the housing 6.

  The optical receptacle 4 is provided at one end of the housing 6, and optical connectors C3 and C4 attached to the ends of the two optical fiber cables C1 and C2 are inserted into and removed from the optical receptacle 4. The other end of the housing 6 has an electrical plug that performs electrical communication with the host system. The optical fiber cable C1 is a transmission optical fiber cable that transmits an optical signal emitted from the optical transceiver 1, and the optical fiber cable C2 is a reception optical fiber cable that transmits an optical signal to the optical transceiver 1.

  By engaging the two optical connectors C3 and C4 with the optical receptacle 4, the electrical circuit inside the housing 6 can communicate with the optical fiber cables C1 and C2. The optical connectors C3 and C4 and the optical receptacle 4 both have a shape that complies with the LC type optical connector standard. The pull tab 5 is made of resin. The pull tab 5 is formed integrally with the slider 3. The slider 3 moves linearly along the longitudinal direction of the optical transceiver 1 in conjunction with the movement of the pull tab 5.

  As shown in FIGS. 2 and 3, the slider 3 moves linearly between a first position P1 which is a position on the housing 6 side and a second position P2 which is a position on the opposite side thereof. To do. FIG. 2 shows the slider 3 located at the first position P1, and FIG. 3 shows the slider 3 located at the second position P2. The slider 3 is at the first position P1 when a force is applied to the pull tab 5, and is located at a second position P2 when a force is applied to the pull tab 5. The optical transceiver 1 is engaged with the cage when the slider 3 is in the first position P1, and the optical transceiver 1 can be removed from the cage only when the slider 3 is in the second position P2.

4 and 5 are perspective views showing a connecting structure of the slider 3, the pull tab 5 and the housing 6. FIG. As shown in FIGS. 4 and 5, the slider 3 surrounds the optical receptacle 4.
The slider 3 is formed by cutting and bending the metal plate. The slider 3 includes a pair of connecting portions 31 that are joined to the pull tab 5 and an interlocking portion 32 that is interlocked with a latch 8 described later.

  FIG. 6A is a perspective view showing the slider 3. As shown in FIG. 6A, the slider 3 includes the connecting portion 31 and the interlocking portion 32 described above, a pair of leg portions 33 that sandwich the optical receptacle 4 from the left and right, and a beam 34 that connects the two leg portions 33. Prepare. A pair of legs 33 and beams 34 surround the optical receptacle 4. The connecting portions 31 extend forward from the front end above the leg portion 33, and each connecting portion 31 is connected to the pull tab 5. The connecting portion 31 has two openings 31a penetrating the connecting portion 31, and the inside of the opening 31a is filled with resin when the pull tab 5 is formed, and is cured so that the slider 3 and the pull tab 5 are integrated. It is formed.

  The two connecting portions 31 are connected to the leg portion 33 via a bent portion 31b that is bent inward from the leg portion 33 (the side that narrows the interval between the leg portions 33). Thereby, the width | variety of the pull tab 5 extended from each connection part 31 is restrict | limited. By limiting the width of the pull tab 5 in this way, even when the optical transceiver 1 is inserted into and removed from each of the closely arranged cages, interference with the adjacent optical transceiver can be reduced.

  The interlocking portion 32 is formed by double-folding the lower end and the front end of the leg portion 33 inward. A bent central piece 38 is interposed between the interlocking portion 32 and the leg portion 33. The interlocking portion 32 is formed with an oblong hole 35 that is inclined upward as it goes forward. The oval hole 35 passes through the interlocking portion 32. The oblong hole 35 has a short axis 35 a and a long axis 35 b, and the long axis is inclined upward toward the front of the optical transceiver 1.

  Further, the slider 3 has a hole 36 that engages with a spring 10 to be described later, and a hole 37 that engages with a protrusion 6 c protruding from the side surface 6 b of the housing 6. The hole 36 is rectangular and penetrates the leg 33. The hole 37 can be omitted when the housing 6 does not have the projection 6c.

  The spring 10 is formed by bending a band-shaped metal member. The spring 10 gives the slider 3 a force for positioning the slider 3 at the first position P1 in a steady state (a state where no force is applied to the pull tab 5). Considering the assemblability of the spring 10, it is preferable to design the spring 10 to be long. However, in a pluggable transceiver such as the optical transceiver 1, it is essential to keep the width within a specified value, so the length of the spring 10 must be shortened.

  Therefore, in the present embodiment, as shown in FIG. 7, the optical transceiver 1 has the spring 10 disposed over its entire width. FIG. 7 is a perspective view showing the positional relationship among the spring 10, the slider 3, and the housing 6. A spring 10 is arranged on the lower surface 6a of the housing 6 on the rear side of a place where a latch 8 described later is mounted. Since the rear side of the latch 8 is an area where no parts are originally arranged, the spring 10 is arranged in this area. A finger 9 which is an EMI shield component is disposed so as to surround the lower surface 6a and the spring 10. The finger 9 can prevent the arranged spring 10 from being detached from the housing 6.

  The housing 6 has a recess 61 that accommodates the latch 8. The recess 61 has a step 62 with which the latch 8 abuts on the bottom surface. A portion 61a on the front side across the step 62 is shallower than a portion 61b on the rear side. Moreover, it has the recessed part 61d further depressed from the said deep bottom location 61b in the center of the location 61b of the back side.

  FIG. 8 is a perspective view showing the latch 8. FIG. 9 is a cross-sectional perspective view showing a state in which the latch 8 is assembled to the housing 6 integrally with the slider 3. The latch 8 is made of metal. The latch 8 includes a main portion 81 on the pull tab 5 side (front side) and an extension portion 82 that extends from the main portion 81 to the rear side of the housing 6. As shown in FIGS. 8 and 9, the width of the extension portion 82 is narrower than the width of the main portion 81. A boundary 85 between the main portion 81 and the extension portion 82 abuts on a step 62 formed in the recess 61 of the housing 6, and the latch 8 has the main portion 81 and the extension portion 82 as a fulcrum using the boundary 85 (contact point) as a fulcrum. Seesaw exercise. The main portion 81 has a shaft 83 protruding from both side surfaces 81a. The extension 82 has a protrusion 84 that protrudes outward from the housing 6.

  10 is a cross-sectional perspective view showing a state in which the latch 8 is omitted from the assembly of the housing 6, the slider 3, and the latch 8 shown in FIG. As shown in FIGS. 9 and 10, the shaft 83 passes through the oval hole 35 of the slider 3 and moves in the oval hole 35 in synchronization with the linear motion of the slider 3. The linear movement of the slider 3 is converted into the vertical movement of the shaft 83 with respect to the latch 8. The vertical movement of the shaft 83 is converted into a seesaw movement of the latch 8 with the edge of the step 62 as a fulcrum, and finally converted into a vertical movement of the protrusion 84. That is, when the slider 3 is pulled, the protrusion 84 is pulled toward the housing 6 and the engagement between the protrusion 84 and the cage is released. On the other hand, when the slider 3 is released, the slider 3 is pulled toward the housing 6 by the action of the spring 10, and this linear motion brings the action of pushing the protrusion 84 of the latch 8 outward of the housing 6. As a result, the protrusion 84 engages with the cage. The extension portion 82 has a convex portion 86 that reinforces the projection 84 on a surface opposite to the surface of the extension portion 82 having the projection 84. The convex portion 86 enters the concave portion 61 d of the housing 6 when the extension portion 82 is drawn to the housing 6 side.

  The mechanism of the slider 3 and the latch 8 will be further described. When the pull tab 5 is pulled, the slider 3 linearly slides to the first position P1 or the second position P2, and the shaft 83 of the latch 8 relatively moves rearward in each oval hole 35. As a result, the main portion 81 is pushed downward, while the extension portion 82 moves upward (seesaw motion with the end portion of the step 62 as a fulcrum), and the protrusion 84 is drawn into the housing 6. As a result, the engagement state between the protrusion 84 and the cage is released. On the other hand, when the pull tab 5 is released, the slider 3 linearly moves from the second position P2 to the first position P1 by the action of the spring 10, and the shaft 83 moves relatively forward in each oblong hole 35. As a result, the main portion 81 is drawn toward the housing 6, the extension 82 is protruded from the lower surface of the housing 6, and the protrusion 84 is engaged with the cage.

  Next, operational effects of the optical transceiver 1 according to the present embodiment will be described. The optical transceiver 1 of the present embodiment is engaged with the housing 6 and interlocks with the operation of the pull tab 5 to move linearly along the long axis direction of the housing 6, a shaft 83 engaged with the slider 3, and A latch 8 having a projection 84 that engages the cage is provided. The shaft 83 engages with an oval hole 35 formed in the slider 3, and the long axis 35 b of the oval hole 35 is inclined at a significant angle with respect to the major axis direction of the housing 6. Therefore, the shaft 83 moves in the oblong hole 35 in conjunction with the linear movement of the slider 3, and the linear movement of the slider 3 is converted into the vertical movement of the protrusion 84.

  Since the linear movement of the slider 3 is directly converted into the seesaw motion of the latch 8, there is no part that rotates outside the housing 6 and this rotational motion is converted into the vertical motion of the latch 8 as in the conventional optical transceiver. The slider 3, the pull tab 5 and the latch 8 can use the optical transceiver 1 in a limited space without interfering with the optical connectors C3 and C4 inserted into the optical receptacle.

  The optical transceiver 1 also includes a spring 10 that pulls the slider 3 back to the housing 6. Thereby, in a state where no force is applied to the pull tab 5, the slider 3 is always pulled toward the housing 6, so that the engagement of the protrusion 84 of the latch 8 with the cage can be more reliably maintained. Furthermore, since the slider 3 is automatically drawn to the housing 6, even a non-rigid resin pull tab 5 can be used.

  As mentioned above, although embodiment which concerns on this invention was described, this invention is not limited to each embodiment mentioned above. That is, it is easily recognized by those skilled in the art that various modifications and changes can be made within the scope of the present invention described in the claims.

DESCRIPTION OF SYMBOLS 1 ... Optical transceiver, 2 ... Transceiver main body, 3 ... Slider, 4 ... Optical receptacle, 5 ... Pull tab, 6 ... Housing, 6a ... Lower surface, 6b ... Side, 6c ... Projection, 7 ... Cover part, 8 ... Latch, 9 ... Finger, 10 ... Spring, 31 ... Connecting part, 31a ... Opening, 32 ... Interlocking part, 33 ... Leg part, 34 ... Beam, 35 ... Oval hole, 35a ... Short axis, 35b ... Long axis, 36, 37 ... Hole , 61 ... concave portion, 61a, 61b ... location, 61d ... concave portion, 62 ... step, 81 ... main portion, 81a ... both sides, 82 ... extension, 83 ... shaft, 84 ... projection, 85 ... boundary, 86 ... convex portion C1, C2 ... optical fiber cable, C3, C4 ... optical connector.

Claims (6)

An optical transceiver that is inserted into and removed from a cage of a host system,
A slider that moves linearly along the longitudinal direction of the optical transceiver;
A latch having a projection that engages with the cage and a shaft that engages with the slider, and the projection moves in a direction crossing the longitudinal direction in conjunction with a linear movement of the slider;
A housing that engages with the slider and has a recess for receiving the latch;
With
The shaft engages with an oval hole formed in the slider;
The long axis of the oblong hole is inclined with respect to the longitudinal direction,
In conjunction with the linear movement of the slider, the shaft moves inside the oblong hole, and the protrusion moves in the intersecting direction.
Optical transceiver. Furthermore, it has a resin pull tab formed integrally with the slider,
The optical transceiver according to claim 1. The slider linearly moves between a first position and a second position along the longitudinal direction, in which the latch engages the cage;
A spring for setting the slider to the first position;
The optical transceiver according to claim 1 or 2. The slider is made of metal and the housing is made of metal;
The optical transceiver according to claim 1. The latch includes a main part having the shaft, and an extension part extending from the main part and having the protrusion,
The recess of the housing accommodates the main part and the extension part,
The location for accommodating the extension of the recess is deeper than the location for accommodating the main portion of the recess,
The optical transceiver as described in any one of Claims 1-4. The concave portion has a step at a boundary between a portion accommodating the main portion and a portion accommodating the extension portion,
A boundary between the main part and the extension part abuts on the step,
The latch has a seesaw motion in synchronism with the linear movement of the slider, with the main part and the extension part as the fulcrum as a fulcrum.
The optical transceiver according to claim 5.

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