CN105158924B - A kind of bandage retaining mechanism - Google Patents

Abstract

The invention relates to a locking device, in particular to a strap locking mechanism. It includes a button, a strap, a casing, a transmission structure and a locking structure, wherein the transmission structure is accommodated in the casing, and the casing includes a first shell, and a through hole is provided on the first casing, and the button passes through The button passes through the through hole and can move axially or rotate in the through hole. The button is stacked and fixedly arranged with the transmission structure. The transmission structure moves with the button and drives the strap to expand and contract for adjustment. The length of the strap, the locking structure is accommodated in the housing and fixedly connected to the transmission structure, the locking structure cooperates with the first housing, and is used to lock the button and the transmission structure position to limit the rotation of the button and the transmission structure. The invention has the advantages of space saving, semi-automatic control, stable structure transfer and good locking and fine-tuning effects.

Description

A strap locking mechanism

technical field

The invention relates to a locking device, in particular to a strap locking mechanism.

Background technique

Most of the strapping products are tied by hand, and the manual binding operation is cumbersome and has the problem of unreliable binding. At present, the straps of some strap products are provided with locking structures, and the length of the straps is adjusted through the locking mechanism, but there are still many problems in the existing locking mechanisms. For example, the back of the head-mounted 3D eyewear products mainly adopts a strap design, and buckles are used to adjust the distance of the head-wearing. The head-wearing locking structure is mainly composed of buckles and straps. When working, the product can only be put on after adjusting the head-wearing distance through the buckle. The main disadvantages of this type of design are: the adjustment is cumbersome, and the distance after the head-wearing is not easy to adjust, the degree of automation is low, and it takes up space.

Contents of the invention

In view of the above problems, the object of the present invention is to provide a strap locking mechanism. The strap locking mechanism has the advantages of simple structure, semi-automatic control, space saving, stable structure transfer, and good locking and fine-tuning effects.

In order to achieve the above object, the present invention adopts the following technical solutions:

A strap locking mechanism, comprising a button, a strap, a casing, and a transmission structure, wherein the transmission structure is accommodated in the casing, the casing includes a first housing, and a through hole is provided on the first casing, The button passes through the through hole and can move axially and rotate in the through hole. The transmission structure and the button are stacked and fixedly arranged. The transmission structure moves with the button and drives the strap to carry out Stretch to adjust the length of this strap. The strap locking mechanism also includes a locking structure, the locking structure is accommodated in the housing and fixedly connected with the transmission structure, and the locking structure cooperates with the first housing to lock the The position of the button and the transmission structure limits the rotation of the button and the transmission structure.

The locking structure includes a locking gear, a connecting plate is provided at one end of the transmission structure connected to the button, and the locking gear is fixedly connected to a side of the connecting plate away from the button.

An inner ring gear is provided on the inner wall of one end of the through hole corresponding to the locking gear, and the axial movement of the button and the transmission structure drives the locking gear to engage or separate from the inner ring gear, to limit the rotation of the button and the transmission structure.

The locking structure further includes a limiting plate, the limiting plate is arranged on a side of the locking gear away from the connecting plate, and the limiting plate is used to limit the axial movement of the locking gear.

The locking gear includes at least one arc-shaped tooth, and the arc-shaped tooth is located on the outside of the transmission structure. Limiting gaps are respectively provided on both sides of the arc-shaped tooth, and one side of the connecting plate far away from the button The side is provided with a limit post corresponding to the upper limit notch of the arc-shaped tooth and accommodated in the limit notch, and the limit post cooperates with the limit notch to limit the position of the arc-shaped tooth .

The limiting post is provided with a threaded hole along the axial direction, and the arc-shaped tooth is fixedly connected with the connecting plate through a locking screw matched with the threaded hole.

The transmission structure also includes a transmission gear and at least one rack, the transmission gear is located at the center of the connection plate away from the button, the transmission gear is fixedly connected to the button through the connection plate, The rack is fixedly connected to the strap along the length direction of the strap and is arranged outside the transmission gear to mesh with the transmission gear.

The strap locking mechanism further includes an elastic reset mechanism accommodated in the housing, the transmission structure also includes a through hole passing through the transmission gear and the connecting plate, and the elastic reset mechanism is arranged on the through the hole and connected with the button for resetting the locking structure.

One end of the button close to the transmission structure is provided at a position corresponding to the through hole, and the housing further includes a second housing detachably connected to the first housing, and the second housing A second column is provided at a position corresponding to the through hole near one end of the transmission structure, and the two ends of the elastic reset mechanism respectively abut against the first column and the part of the second column extending into the through hole catch.

Advantage of the present invention and beneficial effect are:

1. The present invention has the advantages of simple structure, semi-automatic control, space saving, stable structure transmission, good locking and fine-tuning effects.

2. The present invention realizes two-way adjustment through the rotary button, and the operation is simple, convenient and fast.

3. In the present invention, the locking gear is set to fully mesh with the locking teeth on the first housing, so as to achieve the effect of stopping and preventing transmission, and the structure is safe and reliable.

4. The self-locking mechanism of the present invention is reset by releasing the spring to realize semi-automatic control.

5. The present invention is arranged inside the strap to save space.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the present invention;

Fig. 2 is the top view of the present invention;

Fig. 3 is A-A sectional view among Fig. 2;

Fig. 4 is the structural representation of button among the present invention;

Fig. 5 is the structural representation of locking gear in the present invention;

Fig. 6 is the structural representation of transmission gear among the present invention;

Fig. 7 is the structural representation of rack in the present invention;

Fig. 8 is a schematic structural view of the first housing in the present invention;

Fig. 9 is a schematic structural view of the second housing in the present invention;

Figure 10 is a schematic view of the internal assembly of the present invention.

Among them: 1 is the first strap, 2 is the second strap, 3 is the button, 4 is the first casing, 5 is the second casing, 6 is the transmission gear, 7 is the locking gear, 8 is the rack, 9 is a spring, 10 is a first column, 11 is a limiting plate, 12 is a connecting plate, 13 is a limiting column, 14 is a track groove, 15 is a through hole, 16 is an internal ring gear, 17 is a second column, 18 19 is an annular groove, 20 is glasses, and 30 is a strap locking mechanism.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

Please refer to FIG. 1 . FIG. 1 is a schematic diagram of head-mounted 3D glasses provided by a specific embodiment of the present invention. A head-mounted 3D eye provided by the present invention includes a glasses body 20, a strap and a strap locking mechanism 30, the strap includes a first strap 1 and a second strap 2, and the first strap 1 and one end of the second strap 2 are fixedly connected to opposite sides of the glasses body 20 respectively, and the strap locking mechanism 30 is connected to the first strap 1 and the second strap 2 without One end connected to the glasses body 20 is connected. As shown in Figures 1-3 and Figure 8, the strap locking mechanism 30 includes a button 3, a housing, a transmission structure and a locking structure, wherein the transmission structure is accommodated in the housing, and the housing includes a first housing 4. The first housing 4 is provided with a through hole 15, the button 3 passes through the through hole 15 and can move axially and rotate in the through hole 15, and the transmission structure and the The buttons 3 are stacked and fixedly arranged, and the transmission structure moves with the buttons 3 and drives the strap to expand and contract to adjust the length of the strap. The locking structure is accommodated in the housing and is fixedly connected with the transmission structure. The locking structure cooperates with the first housing 4 to lock the position of the button 3 and the transmission structure, limiting The button 3 and the rotation of the transmission structure.

The locking structure includes a locking gear 7, and one end of the transmission structure connected to the button 3 is provided with a connecting plate 12, as shown in Figure 6, the locking gear 7 is fixedly connected to the connecting plate 12 away from 3 side of the button.

The transmission structure also includes a transmission gear 6 and a rack 8, the transmission gear 6 is located at the central position of the connection plate 12 away from the button 3 side, the transmission gear 6 is connected to the connection plate 12 through the connection plate 12. Button 3 is permanently connected. The rack 8 is fixedly connected with the first strap 1 or/and the second strap 2 along the length direction of the strap, and the rack 8 is located outside the transmission gear 6 and meshes with the transmission gear 6 . The number of the racks 8 can be 1 or 2, that is, the racks 8 can only be set on one of the first strap 1 and the second strap 2, or can be set on one of the first straps 1 and 2. Both the belt 1 and the second strap 2 are provided with the rack 8 .

The first strap 1 and the second strap 2 are respectively inserted into the casing through openings at opposite ends of the casing, and the rack 8 is arranged on the first strap 1 or/and the second strap 2 the end of. The button 3 drives the transmission gear 6 to rotate, and the transmission gear 6 drives the rack 8 to move along the length direction of the strap, thereby realizing the size adjustment of the strap.

When the rack 8 is one, the rack 8 is arranged at the end of the first strap 1 or the second strap 2, and is a movable end, and the second strap 2 or the first strap The strap 1 is fixedly connected to the shell and is a fixed end. The button 3 drives the transmission gear 6 to rotate, and the transmission gear 6 drives the rack 8 to expand and contract along the length direction of the strap, thereby realizing one-way adjustment of the size of the strap.

In this embodiment, preferably, the number of the racks 8 may be two, that is, the racks 8 are provided on both the first strap 1 and the second strap 2 . The racks 8 are arranged on opposite sides of the transmission gear 6 respectively, and the two racks 8 are respectively connected with the first strap 1 and the second strap 2, and the button 3 drives the transmission gear 6 Rotate to make the two racks 8 move in relative or opposite directions, so as to realize the two-way adjustment of the size of the strap.

In order to further strengthen the transmission stability of the transmission gear 6 and the rack 8, the ends of the first strap 1 and the second strap 2 inserted into the housing are overlapped, and the ends are respectively arranged along the length direction. A track groove 14 is provided, and the two ends of the track groove 14 are arc-shaped transitions, which are convenient to match with the transmission gear 6 at the extreme position, and the two racks 8 are respectively arranged on two The side walls of the track groove 14 are arranged oppositely, as shown in FIG. 7 . The transmission gear 6 is sequentially inserted into the track grooves 14 of the first strap 1 and the second strap 2 , and meshes with the racks 8 on both sides. The track groove 14 ensures the effective transmission between the transmission gear 6 and the rack 8, improves the transmission stability, and makes the transmission safe and reliable.

As shown in Figure 3 and Figure 8, an inner ring gear 16 is provided on the inner wall of the end corresponding to the through hole 15 and the locking gear 7, and the axial movement of the button 3 and the transmission gear 6 makes the The lock gear 7 is engaged with or separated from the ring gear 16 to limit the rotation of the button 3 and the transmission gear 6 . When the lock gear 7 is engaged with the ring gear 16, the rotation of the button 3 and the transmission gear 6 is restricted; when the lock gear 7 is disengaged from the ring gear 16, the The locking structure restricts the button 3 and the transmission gear 6 .

The locking structure further includes a limiting plate 11, the limiting plate 11 is arranged on the side of the locking gear 7 away from the connecting plate 12, and the limiting plate 11 is used to limit the position of the locking gear 7. axial movement. When the locking gear 7 is fully meshed with the ring gear 16 , the limiting plate 11 abuts against the first housing 4 , thereby limiting the further axial movement of the locking gear 7 . The limiting plate 11 axially limits the locking gear 7 to ensure that the locking gear 7 is fully meshed with the inner ring gear 16 to achieve the effect of stopping and preventing transmission, and the structure is safe and reliable.

The locking gear 7 includes arc-shaped teeth, and the arc-shaped teeth are located on the outside of the transmission gear 6 . Limiting notches are respectively provided on both sides of the arc-shaped teeth, as shown in FIG. 5 . A side of the connecting plate 12 away from the button 3 is provided with a limit post 13 corresponding to the upper limit notch of the arc-shaped tooth and accommodated in the limit notch, as shown in FIG. 6 . The limit post 13 cooperates with the limit notch to define the position of the arc-shaped tooth, and the limit post 13 is provided with a threaded hole in the axial direction, and the arc-shaped tooth is matched with the threaded hole The locking screw 18 is fixedly connected with the connecting plate 12, as shown in FIG. 10 . Driven by the button 3 and the transmission gear 6 , the arc-shaped teeth move axially, and mesh with or separate from the ring gear 16 . The number of the arc-shaped teeth is at least one, but not limited thereto.

In this embodiment, preferably, there are two arc-shaped teeth, and the two arc-shaped teeth are symmetrically installed on the connecting plate 12 and located on opposite sides of the transmission gear 6 . The connecting plate 12 is provided with four limit posts 13, which are respectively accommodated in the limit gaps on both sides of the two arc-shaped teeth, and the limit posts 13 on both sides of the arc-shaped teeth are paired. The arc-shaped teeth are limited in the circumferential direction and in the radial direction. When the two arc-shaped teeth mesh with the ring gear 16 , the rotation of the button 3 and the transmission gear 6 is limited. Two symmetrically installed arc-shaped teeth are used to mesh with the inner ring gear 16, so that the effect of stop and anti-transmission is better and more stable, and the structure is safer and more reliable.

Four arc grooves are evenly distributed on the connecting plate 12 along the circumference, and the four limiting posts 13 are respectively arranged on two opposite sides of the arc grooves. The button 3 is circumferentially provided with four protrusions that are matched and connected with the four arc grooves on the connecting plate 12, wherein two opposite protrusions can drive the connection through the rotation of the button 3. The plate 12 and the transmission gear 6 move in the circumferential direction, and the other two relative projections can push the connecting plate 12 and the transmission gear 6 to move axially by pressing the button 3 (because the connecting plate 12 and the transmission gear 6 move axially) The transmission gear 6 is fixedly connected by four screws), so that the arc-shaped teeth are disengaged from the ring gear 16.

The housing further includes a second housing 5 detachably connected to the first housing 4, the second housing 5 is a square structure, and the square structure is composed of a bottom plate and two sides arranged on both sides of the bottom plate along the length direction. The side plate and the beams arranged at both ends are composed of the bottom plate, the side plates and the two beams forming openings at both ends of the shell, as shown in FIG. 9 . The first strap 1 and the second strap 2 are respectively inserted into the casing through the openings at both ends of the second casing 5 .

In order to achieve the purpose of semi-automatic control, the strap locking mechanism further includes an elastic reset mechanism accommodated in the housing, and the transmission structure also includes a through hole passing through the transmission gear 6 and the connecting plate 12, The elastic resetting mechanism is arranged in the through hole and connected with the button 3 for resetting the locking structure.

A first column 10 is provided at the position corresponding to the through hole at one end of the button 3 close to the transmission structure, as shown in FIG. 4 . One end of the second housing 5 close to the transmission structure is provided with a second column 17 at a position corresponding to the through hole. As shown in FIG. It abuts against the part of the second column 17 protruding into the through hole. The outer side of the second column 17 is provided with an annular groove 19, and the annular groove 19 is a relief groove, which makes way for the stroke of the transmission gear 6 to ensure that the axial movement of the transmission gear 6 has sufficient space.

The elastic return mechanism is a spring 9, which is accommodated in the through hole of the transmission gear 6, and its two ends abut against the first column 10 and the second column 17 respectively. Push the button 3 through the elastic release of the spring 9, and the button 3 drives the locking gear 7 to reset, so that the locking gear 7 and the ring gear 16 are meshed, and the rotation of the transmission gear 6 is limited to realize semi-automatic control. The above structure shortens the axial installation length of the whole mechanism, has a compact structure and reduces the volume of the whole mechanism.

The specific adjustment process of the head-mounted size of the head-mounted 3D eyes is:

When adjusting the size of the headgear, first press the button 3 downwards, and the button 3 moved downwards compresses the spring 9 through the first column 10, and at the same time, the lock gear 7 is separated from the ring gear 16. Then turn the button 3 to the left or right as required, and the button 3 drives the transmission gear 6 to rotate, so that the two racks 8 that are engaged with the transmission gear 6 slide relatively. The flexible adjustment achieves the purpose of adjusting the size of the head-wearing glasses 20 behind the head, and the user can wear the head-wearing glasses 20 comfortably.

Release the button 3 after the size of the rear headgear is adjusted. At this time, the spring 9 compressed by the first column 10 releases the elastic force, and the button 3 moves upward under the elastic force of the spring 9, so that the locking gear 7 is reset and fully meshed with the ring gear 16 , so as to achieve the effect of stop and anti-transmission, the structure is safe and reliable, so as to realize semi-automatic control.

To sum up, the strap locking mechanism provided by the present invention has the advantages of simple and compact structure, convenient operation, space saving, stable structure transmission, and good locking and fine-tuning effects.

The strap locking mechanism provided by the invention is arranged inside the strap, which saves space and enhances the aesthetic effect at the same time. The strap locking mechanism is applied to the straps of strap products for adjusting the tightness of the straps and locking the straps, such as being installed on the back of headwear products.

Claims (8)

1. A strap locking mechanism, comprising a button (3), a strap, a casing and a transmission structure, wherein the transmission structure is accommodated in the casing, the casing includes a first housing (4), and the first The housing (4) is provided with a through hole (15), the button (3) passes through the through hole (15) and can move axially and rotate in the through hole (15), the transmission The structure is stacked with the button (3) and fixedly arranged. The transmission structure moves with the button (3) and drives the strap to expand and contract to adjust the length of the strap. It is characterized in that the strap locking mechanism also It includes a locking structure, the locking structure is accommodated in the housing and fixedly connected with the transmission structure, the locking structure cooperates with the first housing (4) and is used to lock the button (3) and The position of the transmission structure limits the rotation of the button (3) and the transmission structure; The locking structure includes a locking gear (7), an inner ring gear (16) is provided on the inner wall of the through hole (15) corresponding to the locking gear (7), and the button (3) And the axial movement of the transmission structure drives the locking gear (7) to engage or separate from the inner ring gear (16) to limit the rotation of the button (3) and the transmission structure; When the locking gear (7) is separated from the inner ring gear (16), the restriction of the locking structure on the button (3) and the transmission structure is eliminated. 2. The strap locking mechanism according to claim 1, characterized in that, one end of the transmission structure connected to the button (3) is provided with a connecting plate (12), and the locking gear (7) is fixed It is connected to the side of the connecting plate (12) away from the button (3). 3. The belt locking mechanism according to claim 2, characterized in that, the locking structure further comprises a limiting plate (11), and the limiting plate (11) is arranged at a distance from the locking gear (7) On one side of the connecting plate (12), the limiting plate (11) is used to limit the axial movement of the locking gear (7). 4. The strap locking mechanism according to claim 2, characterized in that, the lock gear (7) includes at least one arc-shaped tooth, and the arc-shaped tooth is located on the outside of the transmission structure, and the arc-shaped tooth The two sides of the shaped teeth are respectively provided with limit gaps, and the side of the connecting plate (12) away from the button (3) is provided with a limit gap corresponding to the upper limit gap of the arc-shaped teeth and accommodated in the limit gap. A limit post (13) in the position notch, the limit post (13) cooperates with the limit notch to define the position of the arc-shaped tooth. 5. The strap locking mechanism according to claim 4, characterized in that, said limit post (13) is provided with threaded holes along the axial direction, and said arc-shaped teeth pass through locks matched with the threaded holes. Bit screws (18) are fixedly connected with the connecting plate (12). 6. The strap locking mechanism according to claim 2, characterized in that, the transmission structure further comprises a transmission gear (6) and at least one rack (8), and the transmission gear (6) is located on the The connecting plate (12) is away from the central position on the side of the button (3), the transmission gear (6) is fixedly connected with the button (3) through the connecting plate (12), and the rack (8) It is fixedly connected with the strap along the length direction of the strap and arranged outside the transmission gear (6) to mesh with the transmission gear (6). 7. The strap locking mechanism according to claim 6, characterized in that, the strap locking mechanism further includes an elastic reset mechanism accommodated in the housing, and the transmission structure also includes a The gear (6) and the through hole of the connecting plate (12), the elastic reset mechanism is arranged in the through hole, and connected with the button (3), for the reset of the locking structure. 8. The strap locking mechanism according to claim 7, characterized in that a first column (10) is provided at a position corresponding to the through hole at one end of the button (3) close to the transmission structure, and the The housing further includes a second housing (5) that is detachably connected to the first housing (4), and one end of the second housing (5) close to the transmission structure is provided at a position corresponding to the through hole. For the second column (17), the two ends of the elastic reset mechanism abut against the parts of the first column (10) and the second column (17) protruding into the through hole respectively.