Improved carabiner

Abstract

The utility model provides a kind of improved four-way buckle, including male fastener and female fastener, and the fastening surface of female fastener is formed with a fastening groove, and the fastening surface of male fastener is provided with a fastening convex part;The fastening groove is extended along the fastening surface of female fastener and is sequentially formed with insertion section, transition section, limiting section and fastening section from one end to the other end, and the size of insertion section is greater than the size of fastening section, and the size of limiting section is less than the size of fastening section;Fastening convex part is inserted from insertion section and is buckled into fastening section via transition section and limiting section.The utility model has the advantages that: the firmness of male fastener and female fastener after fastening connection is better, and automatic shedding situation does not appear in the process of use.

Description

[Technical Field]

[0001] This utility model relates to the field of fastener technology, and in particular to an improved four-in-one fastener. [Background Technology]

[0002] Snap fasteners are a common fastening tool used in clothing and other garments, primarily for fastening and connecting items. A typical snap fastener consists of four parts from top to bottom: the front snap, the female snap, the male snap, and the bottom snap. The front snap and the female snap together form the female fastener, while the male snap and the bottom snap together form the male fastener.

[0003] To enable the male and female snap fasteners to engage, existing female snap fasteners require springs on both sides of the engagement groove to hold the male snap fastener's engagement protrusion in place. However, existing snap fasteners have the following drawbacks: the connection between the male and female snap fasteners is not very secure, and they are prone to automatically disengaging during use. [Utility Model Content]

[0004] The technical problem to be solved by this utility model is to provide an improved snap fastener, which solves the problem that the female and male snap fasteners of the existing snap fasteners have poor firmness after being fastened together and are prone to automatic separation during use.

[0005] This utility model is implemented as follows: an improved four-piece snap fastener includes a male fastener and a female fastener. The female fastener has a fastening groove formed on its fastening surface, and the male fastener has a fastening protrusion on its fastening surface. The fastening groove extends along the fastening surface of the female fastener, and from one end to the other end, the fastening groove sequentially forms an insertion section, a transition section, a limiting section, and a fastening section. The size of the insertion section is larger than the size of the fastening section, and the size of the limiting section is smaller than the size of the fastening section. The fastening protrusion is inserted from the insertion section and fastened into the fastening section via the transition section and the limiting section.

[0006] Furthermore, both the insertion section and the fastening section are arc-shaped slots, and the arc radius of the insertion section is larger than that of the fastening section.

[0007] Furthermore, the bisectors of the transition segment and the limiting segment are on the same straight line as the centers of the insertion segment and the engaging segment.

[0008] Furthermore, the distance between the sidewalls on both sides of the limiting segment is less than the arc diameter of the fastening segment.

[0009] Furthermore, the engaging protrusion includes a first cylindrical segment connected to the engaging surface of the male fastener and a second cylindrical segment connected to the first cylindrical segment. The outer diameter of the second cylindrical segment is larger than the arc diameter of the engaging segment, the outer diameter of the first cylindrical segment is less than or equal to the arc diameter of the engaging segment, and the distance between the sidewalls on both sides of the limiting segment is smaller than the outer diameter of the first cylindrical segment.

[0010] Furthermore, both ends of the second cylindrical segment are formed with rounded corners.

[0011] Furthermore, the height of the first cylindrical segment is greater than the height of the sidewall of the engagement groove.

[0012] Furthermore, the female fastener includes a female fastener body and a fastening surface connected to the female fastener body. The fastening groove is formed on the upper surface of the female fastener body. A cavity communicating with the fastening groove is formed in the female fastener body. The lower end of the fastening groove has an extension baffle extending into the cavity.

[0013] Furthermore, the female buckle body includes an upper shell and a lower shell, a fastening groove is formed on the upper surface of the upper shell, and an extension baffle is formed on the inner top wall of the upper shell; the lower end of the upper shell extends inward to form an annular support piece, and the bottom of the lower shell is supported on the annular support piece.

[0014] Furthermore, the male fastener includes a buckle base and a male fastener body connected to the buckle base, and the fastening protrusion is formed on the male fastener body.

[0015] By adopting the technical solution of this utility model, at least the following beneficial effects are achieved: The female fastener's locking groove is designed with an insertion section, a transition section, a limiting section, and a locking section sequentially formed from one end to the other. This allows for easy fastening by simply inserting the locking protrusion into the insertion section and then fastening it through the transition and limiting sections into the locking section. Unfastening requires the user to apply external force to push the locking protrusion out of the locking section and then release it through the transition and insertion sections. Compared to existing snap fasteners that use a forward fastening and forward pulling method, this utility model requires the user to apply external force to push the locking protrusion laterally into the insertion section before separation. Therefore, the male and female fasteners are more secure after fastening and will not automatically detach during use. Furthermore, it enriches the variety of snap fasteners, providing users with more choices. Additionally, the snap fastener eliminates the need for springs, simplifying the overall structure and reducing manufacturing costs. [Attached Image Description]

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a structural diagram of an improved snap fastener in its unfastened state according to this utility model;

[0018] Figure 2 This is a structural diagram of the female fastener of this utility model;

[0019] Figure 3 This is an exploded view of the female fastener of this utility model;

[0020] Figure 4 This is a bottom structural diagram of the upper shell of this utility model;

[0021] Figure 5 This is a structural diagram of the male fastener of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] Male fastener 1, fastening protrusion 11, first cylindrical section 111, second cylindrical section 112, rounded corner surface 113, fastening bottom 12, male fastener body 13;

[0024] Female fastener 2, fastening groove 21, insertion section 211, transition section 212, limiting section 213, fastening section 214, female fastener body 22, cavity 221, upper shell 222, annular support piece 2221, lower shell 223, fastening surface 23, extension baffle 24.

Detailed Implementation Methods

[0025] To better understand the technical solution of this utility model, the technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] It should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing these embodiments and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0027] Please see Figures 1 to 5 As shown, a preferred embodiment of the improved four-piece snap fastener of this utility model includes a male snap fastener 1 and a female snap fastener 2. A snap fastening groove 21 is formed on the snap fastening surface of the female snap fastener 2, and a snap fastening protrusion 11 is provided on the snap fastening surface of the male snap fastener 1, so that the male snap fastener 1 and the female snap fastener 2 can achieve the snap fastening and de-snap functions through the cooperation of the snap fastening protrusion 11 and the snap fastening groove 21.

[0028] The fastening groove 21 extends along the fastening surface of the female fastener 2, and the fastening groove 21 is formed sequentially from one end to the other by an insertion section 211, a transition section 212, a limiting section 213, and a fastening section 214. The size of the insertion section 211 is larger than the size of the fastening section 214, and the size of the limiting section 213 is smaller than the size of the fastening section 214. The size of the insertion section 211 is larger than the size of the entire fastening protrusion 11, so as to facilitate the insertion of the fastening protrusion 11 from the insertion section 211. The transition section 212 is used to serve as a transition. The limiting section 213 is used to limit the fastening protrusion 11 that is fastened into the fastening section 214. The fastening section 214 is used for the fastening protrusion 11 to be fastened in. The fastening protrusion 11 is inserted from the insertion section 211 and fastened into the fastening section 214 via the transition section 212 and the limiting section 213.

[0029] This invention designs the fastening groove 21 of the female fastener 2 to consist of an insertion section 211, a transition section 212, a limiting section 213, and a fastening section 214, arranged sequentially from one end to the other. This design allows for easy fastening by inserting the fastening protrusion 11 into the insertion section 211 and then fastening it through the transition section 212 and the limiting section 213 into the fastening section 214. Conversely, to unfasten the fastener, the user must apply external force to push the fastening protrusion 11 out of the fastening section 214 and then release it through the transition section 212 and the insertion section 211. Compared with existing snap fasteners that use a forward-facing fastening and forward-facing pulling method, this invention requires the user to apply external force to push the fastening protrusion 11 laterally to the insertion section 211 before separation can be achieved. Therefore, the male fastener 1 and female fastener 2 have better stability after being fastened together and will not automatically fall off during use. At the same time, it can also enrich the variety of snap fasteners, thus providing users with more choices. In addition, the snap fastener no longer needs to use a spring, which helps to simplify the structure of the entire snap fastener and reduce manufacturing costs.

[0030] In a preferred embodiment of the present invention, both the insertion section 211 and the fastening section 214 are arc-shaped slots, and the arc radius of the insertion section 211 is greater than the arc radius of the fastening section 214.

[0031] In a preferred embodiment of the present invention, the bisectors of the transition section 212 and the limiting section 213 are on the same straight line as the center of the insertion section 211 and the fastening section 214, so that after the fastening protrusion 11 is inserted from the insertion section 211, the fastening protrusion 11 can be pushed into the fastening section 214 along the straight line, making the operation smoother and more convenient.

[0032] In a preferred embodiment of the present invention, the distance between the sidewalls on both sides of the limiting segment 213 is less than the arc diameter of the fastening segment 214, so that after the fastening protrusion 11 is fastened into the fastening segment 214, the limiting segment 213 can limit the fastening protrusion 11.

[0033] In a preferred embodiment of this utility model, in order to reliably engage the engaging protrusion 11 with the engaging groove 21, the engaging protrusion 11 includes a first cylindrical segment 111 connected to the engaging surface of the male fastener 1 and a second cylindrical segment 112 connected to the first cylindrical segment 111. The outer diameter of the second cylindrical segment 112 is larger than the arc diameter of the engaging segment 214, so that the second cylindrical segment 112 can play a limiting role, preventing the engaging protrusion 11 from being directly engaged after engagement. Pull outwards; the outer diameter of the first cylindrical segment 111 is less than or equal to the arc diameter of the fastening segment 214, and the distance between the side walls on both sides of the limiting segment 213 is less than the outer diameter of the first cylindrical segment 111, so that after the first cylindrical segment 111 is pushed into the fastening segment 214, the limiting segment 213 can limit the first cylindrical segment 111, ensuring that the first cylindrical segment 111 will not automatically leave the limiting segment 213 when no external force is applied to push the first cylindrical segment 111 outwards.

[0034] In a preferred embodiment of the present invention, both ends of the second cylindrical segment 112 are formed with rounded corner surfaces 113, which can prevent scratches to the user or the female fastener 2 during use, and also make the entire fastening protrusion 11 more aesthetically pleasing.

[0035] In a preferred embodiment of the present invention, the height of the first cylindrical segment 111 is greater than the height of the side wall of the fastening groove 21, so that the second cylindrical segment 112 can be positioned below the fastening groove 21 after fastening to achieve a limiting position. In specific implementation of the present invention, the height of the first cylindrical segment 111 can be designed to be slightly greater than the height of the side wall of the fastening groove 21 to improve the stability of the male fastener 1 and the female fastener 2 after fastening.

[0036] In the preferred embodiment of this utility model, please refer to the following: Figure 3 and Figure 4As shown, the female fastener 2 includes a female fastener body 22 and a fastening surface 23 connected to the female fastener body 22. The fastening groove 21 is formed on the upper surface of the female fastener body 22. A cavity 221 communicating with the fastening groove 21 is formed inside the female fastener body 22. The lower end of the fastening groove 21 has an extension baffle 24 extending into the cavity 221. In specific use, when the fastening protrusion 11 is inserted from the insertion section 211 and fastened into the fastening section 214 via the transition section 212 and the limiting section 213, the second cylindrical section 112 will be below the extension baffle 24. Because the outer diameter of the second cylindrical section 112 is larger than the arc diameter of the fastening section 214, the extension baffle 24 will block the second cylindrical section 112, so that the entire fastening protrusion 11 cannot be pulled out in the forward direction.

[0037] In a preferred embodiment of this utility model, the female buckle body 22 includes an upper shell 222 and a lower shell 223. A fastening groove 21 is formed on the upper surface of the upper shell 222, and an extension baffle 24 is formed on the inner top wall of the upper shell 222. An annular support piece 2221 extends inward from the lower end of the upper shell 222, and the bottom of the lower shell 223 is supported on the annular support piece 2221. After assembly, the annular support piece 2221 can restrain the entire lower shell 223, preventing it from detaching from the upper shell 222. In a specific implementation of this utility model, the limiting section 213 can be formed by the extension baffle 24 protruding inward. The limiting section 213 has a certain deformation capability during use, allowing the limiting section 213 to deform when the user applies external force to the fastening protrusion 11, causing the fastening protrusion 11 to enter or leave the fastening section 214.

[0038] In a preferred embodiment of this utility model, the male fastener 1 includes a bottom fastener 12 and a male fastener body 13 connected to the bottom fastener 12, and the fastening protrusion 11 is formed on the male fastener body 13. In specific implementations of this utility model, the female fastener body 22, the fastening surface 23, the bottom fastener 12, and the male fastener body 13 can all be made of metal or the like.

[0039] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An improved four-piece snap fastener, comprising a male fastener and a female fastener, wherein a fastening groove is formed on the fastening surface of the female fastener, and a fastening protrusion is provided on the fastening surface of the male fastener; characterized in that: The fastening groove extends along the fastening surface of the female fastener, and the fastening groove is formed sequentially from one end to the other end by an insertion section, a transition section, a limiting section and a fastening section. The size of the insertion section is larger than the size of the fastening section, and the size of the limiting section is smaller than the size of the fastening section. The fastening protrusion is inserted from the insertion section and fastened into the fastening section via the transition section and the limiting section.

2. An improved snap fastener as described in claim 1, characterized in that: Both the insertion section and the fastening section are arc-shaped slots, and the arc radius of the insertion section is larger than that of the fastening section.

3. An improved snap fastener as described in claim 2, characterized in that: The bisectors of the transition section and the limiting section are on the same straight line as the centers of the insertion section and the fastening section.

4. An improved snap fastener as described in claim 2, characterized in that: The distance between the sidewalls on both sides of the limiting section is less than the arc diameter of the fastening section.

5. An improved snap fastener as described in claim 2, characterized in that: The fastening protrusion includes a first cylindrical segment connected to the fastening surface of the male fastener and a second cylindrical segment connected to the first cylindrical segment. The outer diameter of the second cylindrical segment is larger than the arc diameter of the fastening segment, and the outer diameter of the first cylindrical segment is less than or equal to the arc diameter of the fastening segment. The distance between the sidewalls on both sides of the limiting segment is smaller than the outer diameter of the first cylindrical segment.

6. An improved snap fastener as described in claim 5, characterized in that: Both ends of the second cylindrical segment have rounded corners.

7. An improved snap fastener as described in claim 5, characterized in that: The height of the first cylindrical section is greater than the height of the side wall of the engagement groove.

8. An improved snap fastener as described in claim 1, characterized in that: The female fastener includes a female fastener body and a fastening surface connected to the female fastener body. The fastening groove is formed on the upper surface of the female fastener body. A cavity communicating with the fastening groove is formed in the female fastener body. The lower end of the fastening groove has an extension baffle extending into the cavity.

9. An improved snap fastener as described in claim 8, characterized in that: The female buckle body includes an upper shell and a lower shell. A fastening groove is formed on the upper surface of the upper shell, and an extension baffle is formed on the inner top wall of the upper shell. The lower end of the upper shell extends inward to form an annular support piece, and the bottom of the lower shell is supported on the annular support piece.

10. An improved snap fastener as described in claim 1, characterized in that: The male fastener includes a buckle base and a male fastener body connected to the buckle base, and the fastening protrusion is formed on the male fastener body.

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