A snap buckle with arc structure

Abstract

The utility model discloses a pair of buckles with arc structure, including first fastener and second fastener, both include the connecting portion of L shape, the latching portion of block shape, the material top rubber ring, and the long side position of connecting portion is provided with the through hole of wearing, and the short side position of connecting portion is provided with the positioning through -hole, and the latching portion is connected perpendicularly in the short side end of connecting portion and is set up with the long side position staggered parallel, and the butt joint surface of latching portion is equipped with the positioning convex body and rubber ring installation column, and the material top rubber ring is set up on rubber ring installation column, and the long side position of connecting portion is equipped with arc convex on the side wall of one side of latching portion, and the gradient of arc convex is adapted with the arc of material top rubber ring. The utility model discloses the arc convex of first fastener and second fastener and the face contact cooperation of corresponding material top rubber ring, and the cross -insertion structure and the two -way elastic pressure tight design of intercrossing, can increase the contact area, improve the fault tolerance, and it is not easy to slacken, and the gradient of arc convex is adapted with the arc of material top rubber ring, realizes smooth buckling.

Description

Technical Field

[0001] This utility model relates to the field of snap fastener technology, and more specifically, to a snap fastener with an arc-shaped structure. Background Technology

[0002] Fasteners connect and secure components by mating two fasteners, such as shoulder strap hooks and plastic buckles. Their function is to achieve quick connection. Traditional fasteners, such as the novel R-position structure fastener disclosed in utility model patent publication number CN207461545U, do not have an arc-shaped contact part. This results in the top material rubber ring and the corresponding component only making point contact. This point contact requires a very strict gap between the two fastener components. If the gap is too large, the top material rubber ring cannot make effective contact with the component, affecting the fastening tightness. If the gap is too small, the top material rubber ring will be severely squeezed, which not only makes the fastening operation difficult but also easily damages the top material rubber ring. At the same time, there are problems such as uneven fastening, operation jamming, easy loosening and falling off, affecting the reliability of use and short service life. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide a snap fastener with an arc-shaped structure that can increase the contact surface, improve the fault tolerance rate, and achieve smooth snap-fit ​​and tight connection.

[0004] To achieve the above objectives, this utility model provides a snap fastener with an arc-shaped structure, comprising a first fastener and a second fastener. The first and second fasteners each include an L-shaped connecting portion, a block-shaped engaging portion, and a top-mounted rubber ring. The long side of the connecting portion has a through hole for a strap, and the short side of the connecting portion has a positioning through hole. The engaging portion is vertically connected to the end of the short side of the connecting portion and is offset parallel to the long side. Positioning protrusions and rubber ring mounting posts are spaced apart on the mating surface of the engaging portion. The top-mounted rubber ring is fitted onto the rubber ring mounting post. The long side of the connecting portion is closer to the engaging portion. The side wall is provided with an arc-shaped protrusion. The slope of the arc-shaped protrusion is adapted to the curvature of the top material rubber ring. When the first fastener and the second fastener are fastened, their locking parts are in a cross-insertion state. The positioning protrusion of the first fastener is inserted into the positioning through hole of the second fastener, and the positioning protrusion of the second fastener is inserted into the positioning through hole of the first fastener. The top material rubber ring of the first fastener slides along the arc-shaped protrusion of the second fastener and finally abuts against the inner side wall of the arc-shaped protrusion. The top material rubber ring of the second fastener slides along the arc-shaped protrusion of the first fastener and finally abuts against the inner side wall of the arc-shaped protrusion. After fastening, the first fastener and the second fastener form a bidirectional elastic compression.

[0005] Preferably, the positioning protrusion on the engaging part is located on one side of the arc-shaped protrusion on its connecting part, and the rubber ring mounting post on the engaging part is located on one side of the positioning through hole on its connecting part.

[0006] Preferably, the short side of the connecting part is provided with a rubber ring relief groove for accommodating the top material rubber ring and located at the bottom of the rubber ring mounting post, and the rubber ring relief groove is arranged in an arc shape.

[0007] Preferably, the diameter of the free end of the rubber ring mounting post is larger than the inner diameter of the top material rubber ring, and the top material rubber ring is fitted onto the rubber ring mounting post by an interference fit.

[0008] Preferably, the horizontal height of the rubber ring mounting post is higher than the horizontal height of the positioning protrusion.

[0009] Preferably, the outer end face of the long side portion of the connecting part is provided with a limiting protrusion in the shape of an "I", and the limiting protrusion and the engaging part form an accommodating space for placing another engaging part.

[0010] Preferably, the positioning protrusion is a circular protrusion, the positioning through hole is a circular through hole, and the strap through hole is a square through hole.

[0011] Preferably, the first fastener and the second fastener are both metal fasteners.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model features a novel structure and a reasonable design. The arc-shaped protrusions of the first and second fasteners form a surface contact with the corresponding top material rubber ring, which increases the contact area and improves fault tolerance compared to traditional point contact. The slope of the arc-shaped protrusion matches the curvature of the corresponding top material rubber ring, preventing jamming and achieving smooth fastening. The combination of the positioning protrusion and positioning through hole, along with the bidirectional elastic clamping force generated by the top material rubber ring and the cross-interlocking structure, ensures a secure and reliable connection that is not easily loosened. It is applicable to multiple fields such as textiles, bags, sports equipment, and medical devices, and has strong practicality. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the back structure of the first fastener provided in this embodiment of the utility model;

[0016] Figure 2 This is a front structural diagram of the first fastener provided in this embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the back structure of the second fastener provided in this embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of the back structure of the second fastener provided in this embodiment of the utility model;

[0019] Figure 5 This is a schematic diagram of the back structure of the interlocking buckle with an arc-shaped structure provided in this embodiment of the utility model.

[0020] Figure 6 This is a front structural diagram of the buckle with an arc-shaped structure in the fastening state provided in this embodiment of the utility model;

[0021] Figure 7 This is a physical image of the interlocking device with an arc-shaped structure in an unfastened state, as provided in an embodiment of this utility model. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Please refer to Figure 1 The present invention provides a snap fastener with an arc-shaped structure, including a first snap fastener 1 and a second snap fastener 2 that snap together. The components of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] In this embodiment, the first fastener 1 and the second fastener 2 have the same structure. The first fastener 1 and the second fastener 2 can preferably be set as metal fasteners, preferably alloy materials, which can enhance durability and resistance to deformation and extend service life. Of course, they can also be set as fasteners made of other materials, not limited to this embodiment.

[0025] like Figure 1 and Figure 2As shown, the first fastener 1 may include an L-shaped connecting part 11, a block-shaped engaging part 12, and a top material rubber ring 13. The long side 101 of the connecting part 11 has a through hole 14 for threading, and the short side 102 of the connecting part 11 has a positioning through hole 15. The engaging part 12 is vertically connected to the end of the short side of the connecting part 11 and is offset parallel to the long side 101. The mating surface of the engaging part 12 is provided with positioning protrusions 16 and rubber ring mounting posts 17 at intervals. The top material rubber ring 13 is sleeved on the rubber ring mounting post 17. The side wall of the long side 101 of the connecting part 11 near the engaging part 12 is provided with an arc-shaped protrusion 18 for sliding friction with the top material rubber ring 13. The slope of the arc-shaped protrusion 18 is adapted to the curvature of the top material rubber ring 13.

[0026] Specifically, the positioning protrusion 16 on the engaging part 11 of the first fastener 1 can be located on one side of the arc-shaped protrusion 18 on its connecting part 11, and the rubber ring mounting post 17 on the engaging part 11 is located on one side of the positioning through hole 15 on its connecting part 11.

[0027] Preferably, the positioning protrusion 16 of the first fastener 1 can be set as a circular boss, and correspondingly, its positioning through hole 15 is set as a circular through hole. In addition, the strap through hole 14 is preferably set as a square through hole.

[0028] Preferably, the short side portion 102 of the connecting portion 21 of the first fastener 1 may be provided with a rubber ring relief groove 171 for accommodating the top material rubber ring 23 and located at the bottom of the rubber ring mounting post 17, and the rubber ring relief groove 171 is arranged in an arc shape.

[0029] To prevent the top material rubber ring 13 from falling off the rubber ring mounting post 17, the diameter of the free end of the rubber ring mounting post 17 of the first fastener 1 can be larger than the inner diameter of the top material rubber ring 13. The top material rubber ring 13 is fitted onto the rubber ring mounting post 17 by an interference fit.

[0030] Furthermore, a limiting protrusion 19 in the shape of an "] is provided on the outer end face of the long side portion 101 of the connecting portion 11 of the first fastener 1. The limiting protrusion and the engaging portion 12 form an accommodating space for the engaging portion 22 of the first fastener 2 to be placed, which can limit the lateral displacement of the second fastener 2 and make it stable and reliable.

[0031] like Figure 3 and Figure 4As shown, the second fastener 2 may include an L-shaped connecting part 21, a block-shaped engaging part 22, and a top material rubber ring 23. The long side 201 of the connecting part 21 has a through hole 24 for the strap, and the short side 202 of the connecting part 21 has a positioning through hole 25. The engaging part 22 is vertically connected to the end of the short side 202 of the connecting part 21 and is offset parallel to the long side 201. The mating surface of the engaging part 22 is provided with positioning protrusions 26 and rubber ring mounting posts 27 at intervals. The top material rubber ring 23 is fitted on the rubber ring mounting post 27. The side wall of the long side of the connecting part 21 near the engaging part 22 is provided with an arc-shaped protrusion 28 for sliding friction with the top material rubber ring 23. The slope of the arc-shaped protrusion 28 is adapted to the curvature of the top material rubber ring.

[0032] Specifically, the positioning protrusion 26 on the engaging part 21 of the second fastener 2 can be located on one side of the arc-shaped protrusion 28 on its connecting part 21, and the rubber ring mounting post 27 on the engaging part 21 is located on one side of the positioning through hole 25 on its connecting part 21.

[0033] Preferably, the positioning protrusion 26 of the second fastener 2 can be set as a circular boss, and correspondingly, its positioning through hole 25 is set as a circular through hole. In addition, the strap through hole 24 is preferably set as a square through hole.

[0034] Preferably, the short side portion 202 of the connecting portion 21 of the second fastener 2 may be provided with a rubber ring relief groove 271 for accommodating the top material rubber ring 23 and located at the bottom of the rubber ring mounting post 27, and the rubber ring relief groove 271 is arranged in an arc shape.

[0035] To prevent the top material rubber ring 23 from falling off the rubber ring mounting post 27, the diameter of the free end of the rubber ring mounting post 27 of the second fastener 2 can be larger than the inner diameter of the top material rubber ring 23. The top material rubber ring 23 is fitted onto the rubber ring mounting post 27 by an interference fit.

[0036] Furthermore, a limiting protrusion 29 in the shape of an "] is provided on the outer end face of the long side portion 201 of the connecting portion 21 of the second fastener 2. The limiting protrusion 29 and the engaging portion 22 form an accommodating space for the engaging portion 12 of the first fastener 1 to be placed, which can limit the lateral displacement of the first fastener 1 and make it stable and reliable.

[0037] In this embodiment, the L-shaped connection structure of the first fastener 1 and the second fastener 2 provides spatial misalignment, which facilitates the cross-insertion design. The through hole for the strap facilitates the fixing of the strap, realizing the connection and fixation between the fastener and the external component. The positioning through hole and the positioning protrusion cooperate to achieve precise fastening, improve connection stability, and prevent loosening or misalignment after fastening. The top material rubber ring can provide elastic clamping force to enhance the tightness after fastening. The slope of the arc-shaped protrusion matches the curvature of the top material rubber ring, improving the smoothness of fastening and increasing the contact area.

[0038] like Figure 5 and Figure 6 As shown, when the first fastener 1 and the second fastener 2 are fastened together, their engaging parts are in a cross-insertion state. The positioning protrusion of the first fastener 1 is inserted into the positioning through hole of the second fastener 2, and the positioning protrusion of the second fastener 2 is inserted into the positioning through hole of the first fastener 1. The top material rubber ring of the first fastener 1 slides along the arc-shaped protrusion of the second fastener 2 and finally abuts against the inner side wall of the arc-shaped protrusion. The top material rubber ring of the second fastener 2 slides along the arc-shaped protrusion of the first fastener 1 and finally abuts against the inner side wall of the arc-shaped protrusion. After fastening, the first fastener 1 and the second fastener 2 form a bidirectional elastic compression.

[0039] Furthermore, the arc-shaped protrusions of the first fastener 1 and the second fastener 2 are designed to match the curvature of the corresponding top material rubber ring, ensuring that the two always maintain surface contact during the fastening process, improving fault tolerance and ensuring smooth sliding. The interlocking engagement part and the cooperation of the positioning protrusion further restrict the lateral displacement after fastening, preventing accidental loosening.

[0040] Preferably, the horizontal height of the rubber ring mounting post 17 of the first fastener 1 and the rubber ring mounting post 27 of the second fastener 2 are both higher than the horizontal height of their respective positioning protrusions. This design ensures that the outer peripheral edge of the top material rubber ring first slides into the arc-shaped protrusion, forming surface contact and generating pre-tightening force. This provides a stable guide for the subsequent precise insertion of the positioning protrusion into the positioning through hole, ensuring that the fastening action is carried out in an orderly manner.

[0041] In summary, the arc-shaped protrusions of the first and second fasteners of this utility model form a surface contact with the corresponding top material rubber ring, which increases the contact area and improves fault tolerance compared to traditional point contact. The slope of the arc-shaped protrusion matches the curvature of the corresponding top material rubber ring, avoiding jamming and achieving smooth fastening. The bidirectional elastic clamping force generated by the positioning protrusion and positioning through hole, combined with the cross-interlocking structure, makes the connection secure and reliable and not easy to loosen. It is applicable to multiple fields such as textiles, bags, sports equipment, and medical devices, and has strong practicality.

[0042] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A snap fastener with an arc-shaped structure, characterized in that: The fastener includes a first fastener and a second fastener, characterized in that: both the first fastener and the second fastener include an L-shaped connecting portion, a block-shaped engaging portion, and a top-mounted rubber ring; the long side of the connecting portion has a through hole for the strap, and the short side of the connecting portion has a positioning through hole; the engaging portion is vertically connected to the end of the short side of the connecting portion and is offset parallel to the long side; the mating surface of the engaging portion is provided with positioning protrusions and rubber ring mounting posts spaced apart; the top-mounted rubber ring is fitted onto the rubber ring mounting post; the long side of the connecting portion near the engaging portion has an arc-shaped protrusion on its sidewall; the arc-shaped protrusion... The slope of the protrusion matches the curvature of the top material rubber ring. When the first fastener and the second fastener are fastened together, their engaging parts are in a cross-insertion state. The positioning protrusion of the first fastener is inserted into the positioning through hole of the second fastener, and the positioning protrusion of the second fastener is inserted into the positioning through hole of the first fastener. The top material rubber ring of the first fastener slides along the arc-shaped protrusion of the second fastener and finally abuts against the inner sidewall of the arc-shaped protrusion. The top material rubber ring of the second fastener slides along the arc-shaped protrusion of the first fastener and finally abuts against the inner sidewall of the arc-shaped protrusion. After fastening, the first fastener and the second fastener form a bidirectional elastic compression.

2. The snap fastener with an arc-shaped structure according to claim 1, characterized in that: The positioning protrusion on the engaging part is located on one side of the arc-shaped protrusion on its connecting part, and the rubber ring mounting post on the engaging part is located on one side of the positioning through hole on its connecting part.

3. The snap fastener with an arc-shaped structure according to claim 1, characterized in that: The short side of the connecting part is provided with a rubber ring relief groove for accommodating the top material rubber ring and located at the bottom of the rubber ring mounting post. The rubber ring relief groove is arranged in an arc shape.

4. The snap fastener with an arc-shaped structure according to claim 1, characterized in that: The diameter of the free end of the rubber ring mounting post is larger than the inner diameter of the top material rubber ring, and the top material rubber ring is fitted onto the rubber ring mounting post by means of interference fit.

5. The snap fastener with an arc-shaped structure according to claim 1, characterized in that: The horizontal height of the rubber ring mounting post is higher than the horizontal height of the positioning protrusion.

6. The snap fastener with an arc-shaped structure according to claim 1, characterized in that: The outer end face of the long side of the connecting part is provided with a limiting protrusion in the shape of an "I". The limiting protrusion and the engaging part form an accommodating space for placing another engaging part.

7. The snap fastener with an arc-shaped structure according to claim 1, characterized in that: The positioning protrusion is configured as a circular protrusion, the positioning through hole is configured as a circular through hole, and the strap through hole is configured as a square through hole.

8. The snap fastener with an arc-shaped structure according to claim 1, characterized in that: The first fastener and the second fastener are both metal fasteners.

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