CN213655392U

CN213655392U - Expansion buckle

Info

Publication number: CN213655392U
Application number: CN202022589935.1U
Authority: CN
Inventors: 施胜利; 邵庆贤; 胡执中
Original assignee: Ningbo Shengli Fastener Co ltd
Current assignee: Ningbo Shengli Fastener Co ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-07-09
Anticipated expiration: 2030-11-10

Abstract

The application discloses an expansion buckle, which comprises a female buckle and a male buckle, wherein an expansion cavity is formed in the female buckle, and the male buckle is suitable for entering the expansion cavity along the vertical direction and enabling the female buckle to expand along the circumferential direction to realize locking; the sub-buckle is provided with a clamping thread along the axial direction, at least one clamping tooth is arranged in the expansion cavity, and the clamping tooth can elastically deform outwards; the sub-buckle can be pushed from top to bottom, and pushes the clamping teeth outwards through the clamping thread to enter the expansion cavity; the clamping teeth can be clamped into the clamping threads and limit the sub buckle from being pulled out of the expansion cavity from bottom to top; the latch can along the joint screw thread carries out relative screw motion, rotates the son is detained, can make the son is detained and is up screwed out from down the inflation chamber. The fixing device has the advantages of convenience in installation, reliability in fixing, lower cost and reusability.

Description

Expansion buckle

Technical Field

The application relates to the technical field of fasteners, in particular to an automobile buckle.

Background

The expansion buckle structure commonly used in the field of automobile parts at present is of two forms:

firstly, a thread fit type expansion buckle. The outer surface of the male buckle and the inner surface of the female buckle of the expansion buckle are designed into matched threads, and the head of the male buckle is designed with a cross groove. The male buckle enters the female buckle through rotation of the male buckle, and the female buckle is expanded, so that the clamping and locking functions of the expansion buckle are realized. The expansion buckle can be repeatedly used for 3-4 times, but due to the existence of a thread structure, a mold is complex, and the manufacturing cost is relatively high; and this kind of inflation buckle need rise through the cross and assemble and dismantle, has the inconvenient problem of loading and unloading.

And secondly, clamping and connecting a limiting type expansion buckle. The surface of the male buckle and the surface of the female buckle of the expansion buckle are smooth, the male buckle and the female buckle are designed to be limited by one section of stroke, and an inverted buckle structure is adopted between the male buckle and the female buckle. When the male buckle advances and pushes forward, the female buckle expands, and the clamping and locking functions of the expansion buckle are realized. The buckle is convenient to mount, large in clamping force, reliable in fixation, relatively low in cost, and incapable of being repeatedly used, and needs to be destructively disassembled.

Therefore, the two existing expansion buckles respectively have the defects, and the convenience in assembling and disassembling and the repeated use cannot be realized at the same time.

How to improve the existing expansion buckle to overcome the above problems is a problem to be solved urgently by those skilled in the art.

Disclosure of Invention

An object of this application is to provide a simple to operate, fixed reliable, the cost is lower, and repeatedly usable's inflation buckle.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows: an expansion buckle comprises a female buckle and a male buckle, wherein an expansion cavity is formed in the female buckle, and the male buckle is suitable for entering the expansion cavity along the vertical direction and enabling the female buckle to expand along the circumferential direction to realize locking;

the sub-buckle is provided with a clamping thread along the axial direction, at least one clamping tooth is arranged in the expansion cavity, and the clamping tooth can elastically deform outwards; the sub-buckle can be pushed from top to bottom, and pushes the clamping teeth outwards through the clamping thread to enter the expansion cavity; the clamping teeth can be clamped into the clamping threads and limit the sub buckle from being pulled out of the expansion cavity from bottom to top; the latch can along the joint screw thread carries out relative screw motion, rotates the son is detained, can make the son is detained and is up screwed out from down the inflation chamber.

Preferably, the upper end of the latch is provided with a pushing surface which is inclined from top to bottom from outside to inside, and when the sub-buckle enters the expansion cavity from top to bottom, the clamping thread can abut against the pushing surface and force the latch to deform outwards; the lower end of the clamping tooth is provided with a reversed limiting surface, and when the clamping tooth is clamped into the clamping thread, the limiting surface props against the clamping thread and limits the linear motion of the sub-buckle from bottom to top; the latch inboard be provided with the homocentric arc surface of joint screw thread, the son detain the accessible the joint screw thread with the cooperation of arc surface, it is relative the latch rotates. Through the simple setting (also be a general buckle structure) to the latch structure, realize that the son detains and to push into the inflation chamber, but can not pull out the inflation chamber, only can unscrew the inflation chamber.

As an improvement, the latch is arranged on the peripheral side of the female buckle and extends into the expansion cavity, and deformation grooves are formed in two sides of the latch. The connection wall of the latch formed by the deformation groove becomes thin, so that outward elastic deformation can be better realized.

Preferably, the expansion cavity is arranged on the female buckle in a penetrating manner along the front-back direction, and the female buckle is suitable for expanding along the left-right direction; the two clamping teeth are oppositely arranged on the front side and the rear side of the expansion cavity; the thread pitch of the clamping thread is P, the height difference of the two clamping teeth is H, H is 0.5n multiplied by P, and n is an odd number which is larger than or equal to 1. The connection of the male buckle and the female buckle is more reliable due to the arrangement of the two clamping teeth, and the two clamping teeth can enter the tooth bottom of the clamping thread simultaneously due to the arrangement of the parameters, so that interference and clamping stagnation are avoided.

As a conventional setting, the expansion cavity comprises an extension section, a guide section, an expansion section and an accommodating section, the sub-buckle is suitable for being tightly attached to the inner wall of the extension section to enter the female buckle, the guide section inclines from the outside to the inside from top to bottom, the sub-buckle is abutted to the guide section to slide downwards, the expansion section can expand outwards, and the sub-buckle penetrates through the expansion section and then enters the accommodating section.

As conventional setting, the son is detained and is the screw structure, the son is detained including head, tooth portion and point portion, the head up end is provided with needle portion, be suitable for the insertion tool to rotate the son is detained, the joint screw thread set up in tooth portion week side, point portion is suitable for the direction and gets into the inflation chamber.

Compared with the prior art, the beneficial effect of this application lies in: the expansion buckle of this scheme has the advantage of the existing screw-thread fit formula expansion buckle, has the advantage of the spacing formula expansion buckle of joint again, and specific theory: when the expansion buckle is assembled and disassembled, the expansion buckle is just required to push the male buckle into the female buckle as the clamping limiting type expansion buckle, and the expansion buckle has the advantage of convenience in installation; due to the arrangement of the clamping threads and the clamping teeth, the expansion buckle can be disassembled through the rotary sub-buckle without destructive disassembly, so that the expansion buckle can be repeatedly used, and the use cost of the expansion buckle can be reduced; in addition, the female buckle has no internal thread structure, so the injection molding process is relatively simple, while the male buckle has a conventional external thread structure, and a complex mold is not needed for molding, so the manufacturing cost is relatively low.

Drawings

FIG. 1 is a schematic perspective view of a preferred embodiment according to the present application;

FIG. 2 is a top view of a preferred embodiment according to the present application;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2 in accordance with a preferred embodiment of the present application;

FIG. 4 is a cross-sectional view taken along the line B-B in FIG. 2, in accordance with a preferred embodiment of the present application;

FIG. 5 is a half sectional view of a sub-clasp in accordance with a preferred embodiment of the present application;

FIG. 6 is a top view of the box according to a preferred embodiment of the present application;

FIG. 7 is a cross-sectional view taken along the direction C-C in FIG. 6 in accordance with a preferred embodiment of the present application;

FIG. 8 is a cross-sectional view taken along the direction D-D in FIG. 6 in accordance with a preferred embodiment of the present application;

FIG. 9 is a cross-sectional view taken along the direction E-E in FIG. 8, in accordance with a preferred embodiment of the present application.

In the figure: 1. a female buckle; 2. a sub-buckle; 11. an expansion chamber; 12. clamping teeth; 21. clamping threads; 22. a head portion; 23. a tooth portion; 24. a tip portion; 25. a needle portion; 111. an extension section; 112. a guide section; 113. an expansion section; 114. an accommodating section; 120. a deformation groove; 121. pushing the surface; 122. a limiting surface; 123. a circular arc surface.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1 to 9, a preferred embodiment of the present application includes a box 1 and a sub-box 2, wherein the box 1 is provided with an expansion cavity 11, and the sub-box 2 is adapted to enter the expansion cavity 11 along an up-and-down direction and expand the box 1 along a circumferential direction to achieve locking. The concrete structure is as follows:

the expansion cavity 11 is arranged on the female buckle 1 in a penetrating manner along the front-back direction, and the female buckle 1 is suitable for expansion along the left-right direction; the peripheral side of the female buckle 1 is provided with a latch 12, the latch 12 extends into the expansion cavity 11, and both sides of the latch 12 are provided with deformation grooves 120, so that the latch 12 can elastically deform outwards. In this embodiment, two latches 12 are oppositely disposed at the front and rear sides of the expansion cavity 11.

The sub-buckle 2 is provided with a clamping thread 21 matched with the clamping tooth 12 along the axial direction. The secondary buckle 2 can be pushed from top to bottom and pushes the latch 12 outwards to enter the expansion cavity 11 through the clamping thread 21; the latch 12 can be clamped into the clamping thread 21 and limits the sub-buckle 2 to be pulled out of the expansion cavity 11 from bottom to top; the latch 12 can perform relative spiral motion along the latch thread 21, and the sub-buckle 2 is rotated to make the sub-buckle 2 be screwed out of the expansion cavity 11 from bottom to top. In this embodiment, in order to simultaneously engage the two latches 12 with the engaging screw 21, the pitch of the engaging screw 21 is P, and the height difference between the two latches 12 is H, which is 0.5 × P.

In this embodiment, the upper end of the latch 12 is provided with a pushing surface 121 inclined from top to bottom from outside to inside, and when the sub-buckle 2 enters the expansion cavity 11 from top to bottom, the clamping thread 21 can abut against the pushing surface 121 and force the latch 12 to deform outwards; the lower end of the latch 12 is provided with a reversed limiting surface 122, and when the latch 12 is clamped in the clamping thread 21, the limiting surface 122 props against the clamping thread 21 and limits the linear motion of the sub-buckle 2 from bottom to top; the inner side of the latch 12 is provided with an arc surface 123 concentric with the clamping thread 21, and the sub-buckle 2 can rotate relative to the latch 12 through the matching of the clamping thread 21 and the arc surface 123. In order to make the pushing more smooth, the pushing surface 121 is a circular arc structure protruding inward. The limiting surface 122 is a horizontal surface for convenient processing and reliable limiting.

As a conventional arrangement, the expansion cavity 11 comprises an extension section 111, a guide section 112, an expansion section 113 and an accommodation section 114, the male buckle 2 is suitable for being tightly attached to the inner wall of the extension section 111 to enter the female buckle 1, the guide section 112 is inclined from top to bottom from outside to inside, the male buckle 2 is abutted against the guide section 112 to slide downwards, the expansion section 113 can be expanded outwards, and the male buckle 2 penetrates through the expansion section 113 to enter the accommodation section 114. The sub-buckle 2 is in a screw structure, the sub-buckle 2 comprises a head 22, a tooth part 23 and a tip part 24, a needle part 25 is arranged on the upper end face of the head 22 and is suitable for inserting a tool to rotate the sub-buckle 2, a clamping thread 21 is arranged on the periphery of the tooth part 23, and the tip part 24 is suitable for guiding the tool to enter the expansion cavity 11. In this embodiment, the needle portion 25 is a cross-shaped groove, and is suitable for being inserted into a cross screwdriver for rotation and disassembly.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims

1. An expansion buckle comprises a female buckle and a male buckle, wherein an expansion cavity is formed in the female buckle, and the male buckle is suitable for entering the expansion cavity along the vertical direction and enabling the female buckle to expand along the circumferential direction to realize locking; the method is characterized in that:

2. An expansion buckle according to claim 1, characterized in that: the upper end of the latch is provided with a pushing surface which is inclined from top to bottom from outside to inside, and when the sub-buckle enters the expansion cavity from top to bottom, the clamping thread can abut against the pushing surface and force the latch to deform outwards; the lower end of the clamping tooth is provided with a reversed limiting surface, and when the clamping tooth is clamped into the clamping thread, the limiting surface props against the clamping thread and limits the linear motion of the sub-buckle from bottom to top; the latch inboard be provided with the homocentric arc surface of joint screw thread, the son detain the accessible the joint screw thread with the cooperation of arc surface, it is relative the latch rotates.

3. An expansion buckle according to claim 2, characterized in that: the latch is arranged on the periphery of the female buckle and extends into the expansion cavity, and deformation grooves are formed in two sides of the latch.

4. An expansion buckle according to claim 3, characterized in that: the expansion cavity is arranged on the female buckle in a penetrating manner along the front-back direction, and the female buckle is suitable for expansion along the left-right direction; the two clamping teeth are oppositely arranged on the front side and the rear side of the expansion cavity; the thread pitch of the clamping thread is P, the height difference of the two clamping teeth is H, H is 0.5n multiplied by P, and n is an odd number which is larger than or equal to 1.

5. An expansion buckle according to any one of claims 1 to 4, characterized in that: the expansion cavity comprises an extension section, a guide section, an expansion section and a containing section, the sub-buckle is suitable for being tightly attached to the inner wall of the extension section to enter the female buckle, the guide section inclines from top to bottom from outside to inside, the sub-buckle is abutted to the guide section to slide downwards, the expansion section expands outwards, and the sub-buckle penetrates through the expansion section and then enters the containing section.

6. An expansion buckle according to claim 5, characterized in that: the son is detained and is the screw structure, the son is detained including head, tooth and point portion, the head up end is provided with needle portion, be suitable for the insertion tool to rotate the son is detained, the joint screw thread set up in tooth week side, point portion is suitable for the direction and gets into the inflation chamber.