Anti-drop stacked fastener

Abstract

The utility model relates to a kind of anti-falling stacked fasteners, including annular part and the hook-shaped part parallelly connected with annular part, annular part is rectangular closed loop, including 2 segments straight, and the first arc-shaped part and the second arc-shaped part respectively connected between the front and rear ends of straight are included;Hook-shaped part includes: the horizontal bar extending from the first arc-shaped part same horizontal tangent direction, the vertical bar connected with horizontal bar, and the hook portion connected with vertical bar.The first annular groove in the utility model is equipped with I-shaped protrusion, can effectively increase friction when shoulder strap is stressed, prevent accidental slip in use process, improve stability;The second annular groove in the utility model is equipped with the guide-in portion with guide inclined plane, can make shoulder strap smoothly be clamped into, assembly is more convenient, and the width of hook portion is greater than the width of second annular groove, ensure that shoulder strap is not easy to fall off from second annular groove under no external force.

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, and specifically relates to an anti-falling stacked fastener. Background Art

[0002] In garments (such as adjustment straps for backpacks, chest bags, outdoor clothing), luggage and various types of sports equipment, length-adjustable shoulder straps or back straps are essential functional components, and one of the commonly used members is the day-shaped buckle. The traditional day-shaped buckle is usually composed of a rectangular buckle body, inside which one or more transverse barrier posts are arranged to divide the internal space into two or three channels, and it is named for its shape similar to the Chinese character "Ri" (meaning sun).

[0003] However, most of the existing day-shaped buckles are integrally formed fully enclosed annular structures, with completely symmetrical contours on the top, bottom, left and right. Although this design is simple in production, in actual use, users need to repeatedly pass the flat shoulder strap through the smooth inner hole, which is not intuitive and convenient in operation; moreover, the internal channels of the traditional day-shaped buckle, including the surfaces of all barrier posts, are usually designed to be very smooth. When the user is subjected to external forces such as movement, bending over, and carrying heavy loads, the shoulder strap is prone to "slip" inside the fastener, resulting in a change of the preset length, which is commonly known as the "loose fastening" or "release" phenomenon; and because the internal channel is smooth and regular in shape, when the shoulder strap passes through the fastener at a specific angle (not 180 degrees straight), local twisting or folding is very likely to occur under the stressed state, forming an unsightly bulge, which not only affects the appearance, but also aggravates the user's discomfort due to uneven pressure distribution, and even wears the shoulder strap material itself. Utility Model Content

[0004] The purpose of the utility model is to provide an anti-falling stacked fastener, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an anti-falling stacked fastener, comprising an annular part and a hook-shaped part connected side by side with the annular part, the annular part is a rectangular closed loop, comprising 2 straight parts, and a first arc part and a second arc part respectively connected between the front and rear ends of the straight parts;

[0006] The hook-shaped part comprises: a transverse strip extending from the first arc part in the direction of the same horizontal tangent, a vertical strip connected with the transverse strip, and a hook part connected with the vertical strip;

[0007] A first annular groove is defined in the annular part, the side of the first annular groove close to the vertical strip is a smooth part, the side of the first annular groove away from the vertical strip is provided with a first protruding part, and the first protruding part is provided with a plurality of I-shaped protrusions;

[0008] A second annular groove is formed between the hook-shaped portion and the adjacent straight portion. A second protrusion is provided on the side of the second annular groove near the annular portion. The second protrusion has multiple trapezoidal protrusions.

[0009] The second annular groove has an opening on one side of the hook portion, and an inlet portion extends between the second protrusion and the second arc-shaped portion.

[0010] Preferably, the angle α between the outer edges of the vertical bar and the horizontal bar is 85° to 89°, and the angle b between the hook and the inner edge of the vertical bar is 85° to 89°.

[0011] Preferably, the width W1 of the hook is greater than the width W2 of the second annular groove.

[0012] Preferably, the inner edge of the first annular groove extends toward the outer edge of the fastener to form a first edging, and the inner edge of the second annular groove is provided with a second edging, and the thickness H1 of the second edging is greater than the thickness H2 of the first edging.

[0013] Preferably, the thickness difference between the first edge banding and the second edge banding is 0.3 mm to 1.0 mm.

[0014] Preferably, the I-shaped protrusions are arranged at equal intervals along the inner circumferential direction of the first annular groove.

[0015] Preferably, the trapezoidal protrusions are arranged at equal intervals along the inner circumferential direction of the second annular groove.

[0016] Preferably, the inlet portion is a guide slope that gradually decreases from the second protrusion to the second arc-shaped portion.

[0017] Preferably, the outer edges of the fasteners are all smoothly transitioned.

[0018] Preferably, the fastener is integrally injection molded.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] The first annular groove of this utility model is provided with an I-shaped protrusion, which can effectively increase the friction when the shoulder strap is under force, prevent accidental slippage during use, and improve stability;

[0021] The second annular groove in this utility model is provided with an inlet part with a guide slope, which allows the shoulder strap to be smoothly inserted, making assembly more convenient. In addition, the width of the hook part is greater than the width of the second annular groove, ensuring that the shoulder strap is not easy to fall off from the second annular groove without external force.

[0022] In this utility model, the included angles between the vertical strip and the horizontal strip, and between the hook and the vertical strip, are all 85° to 89°. The inclined design is more in line with ergonomics, guiding the shoulder strap to fit naturally and reducing twisting, folding and wear.

[0023] In this invention, the edge thickness of the first annular groove is less than that of the second annular groove, which enhances the structural strength and load-bearing capacity of the annular part while also taking into account the lightweight and flexibility of the hook part. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a top view of the present invention;

[0026] Figure 3 This is a three-dimensional structural schematic diagram of the present invention from another perspective;

[0027] Figure 4 This is a schematic diagram showing the dimensions of each component in this utility model;

[0028] Figure 5 This is a three-dimensional structural diagram of Embodiment 3 of this utility model.

[0029] The numbers in the diagram are: 1-ring-shaped part, 101-straight part, 102-first arc-shaped part, 103-second arc-shaped part, 2-hook-shaped part, 201-horizontal bar, 202-vertical bar, 203-hook part, 4-first annular groove, 5-smooth part, 6-first protrusion, 601-I-shaped protrusion, 7-second annular groove, 8-second protrusion, 801-trapezoidal protrusion, 9-opening, 10-inlet part, 12-first edging, 11-second edging. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1

[0032] like Figures 1 to 4The fastener shown includes an annular portion 1 and a hook-shaped portion 2 connected in parallel with the annular portion 1. The annular portion 1 is a rectangular closed loop, including two straight sections 101, and a first arc-shaped portion 102 and a second arc-shaped portion 103 respectively connected between the front and rear ends of the straight sections 101. The hook-shaped portion 2 includes: a horizontal bar 201 extending from the first arc-shaped portion 102 in the same horizontal tangential direction, a vertical bar 202 connected to the horizontal bar 201, and a hook portion 203 connected to the vertical bar 202. A first annular groove 4 is formed in the annular portion 1. The side of the first annular groove 4 near the vertical bar 202 is a smooth portion 5, and the side of the first annular groove 4 away from the vertical bar 202 is provided with a first protrusion 6, which has multiple I-shaped protrusions 601. A second annular shape is formed between the hook-shaped portion 2 and the adjacent straight section 101. The second annular groove 7 has a second protrusion 8 on the side near the annular portion 1, and the second protrusion 8 has multiple trapezoidal protrusions 801; the second annular groove 7 has an opening 9 on the side of the hook portion 203, and an inlet portion 10 extends between the second protrusion 8 and the second arc-shaped portion 103; the angle α between the outer edge of the vertical bar 202 and the horizontal bar 201 is 85° to 89°, and the angle b between the hook portion 203 and the inner edge of the vertical bar 202 is 85° to 89°; the width W1 of the hook portion 203 is greater than the width W2 of the second annular groove 7; the inner edge of the first annular groove 4 extends towards the outer edge of the fastener to form a first edging 12, and the inner edge of the second annular groove 7 has a second edging 11, and the thickness H1 of the second edging 11 is greater than the thickness H2 of the first edging 12; the thickness difference between the first edging 12 and the second edging 11 is 0.3. mm~1.0 mm; I-shaped protrusions 601 are equidistantly arranged along the inner edge of the first annular groove 4; trapezoidal protrusions 801 are equidistantly arranged along the inner edge of the second annular groove 7; the guide portion 10 is a guide slope that gradually decreases from the second protrusion portion 8 to the second arc-shaped portion 103; the outer edge of the fastener is smooth transition; the fastener is integrally injection molded.

[0033] The first annular groove 4 of this invention has an I-shaped protrusion 601, which effectively increases friction when the shoulder strap is under force, preventing accidental slippage during use and improving stability. The second annular groove 7 of this invention has an inlet part 10 with a guide slope, which allows the shoulder strap to be smoothly inserted, making assembly more convenient. The width of the hook part 203 is greater than the width of the second annular groove 7, ensuring that the shoulder strap is not easy to fall off from the second annular groove 7 without external force. The included angles between the vertical bar 202 and the horizontal bar 201, and between the hook part 203 and the vertical bar 202 of this invention are all 85° to 89°. The inclined design is more ergonomic, guiding the shoulder strap to fit naturally and reducing twisting, folding and wear. The edge thickness of the first annular groove 4 of this invention is less than that of the second annular groove 7, which enhances the structural strength and load-bearing capacity of the annular part 1, while also taking into account the lightness and flexibility of the hook part 2.

[0034] Example 2

[0035] like Figures 1 to 4 The fastener shown includes an annular portion 1 and a hook-shaped portion 2 connected in parallel with the annular portion 1. The fastener is integrally injection molded, with a compact structure and reliable strength. The annular portion 1 is a rectangular closed loop, specifically including two straight portions 101, and a first arc-shaped portion 102 and a second arc-shaped portion 103 respectively connected between the front and rear ends of the straight portions 101. The first arc-shaped portion 102 is connected between the front sides of the straight portions 101, and the second arc-shaped portion 103 is connected between the rear sides of the straight portions 101, forming a stable frame structure.

[0036] A first annular groove 4 is formed inside the annular portion 1 for the shoulder strap to pass through. The side of the first annular groove 4 closest to the vertical bar 202 is a smooth portion 5, which facilitates the smooth insertion of the shoulder strap. The side of the first annular groove 4 away from the vertical bar 202 is provided with a first protrusion 6, so that the inner edge of the first annular groove 4 is smooth on one side and uneven on the other side in the length direction, while the inner edge width direction is arc transition. When the shoulder strap is pulled out towards the first protrusion 6, it will come into contact with the first protrusion 6. The first protrusion 6 has multiple I-shaped protrusions 601, which are equidistantly arranged along the inner edge of the first annular groove 4. This effectively increases the friction when the shoulder strap is under force, prevents the shoulder strap from accidentally slipping off during use, and improves the stability of use.

[0037] The hook-shaped portion 2 is connected to the annular portion 1 in parallel, specifically including: a horizontal bar 201 extending from the first arc-shaped portion 102 in the same horizontal tangential direction, a vertical bar 202 connected to the horizontal bar 201, and a hook portion 203 connected to the vertical bar 202; a second annular groove 7 is formed between the hook-shaped portion 2 and the adjacent straight portion 101, the second annular groove 7 is parallel to the first annular groove 4, and a second protrusion 8 is provided on the side of the second annular groove 7 near the annular portion 1, the second protrusion 8 having a plurality of trapezoidal protrusions 801, the trapezoidal protrusions 801 being circumferentially along the inner edge of the second annular groove 7. The shoulder straps are arranged at equal intervals. The second annular groove 7 has an opening 9 on one side of the hook 203 to facilitate the insertion of the shoulder strap. An inlet 10 extends between the second protrusion 8 and the second arc-shaped part 103. The inlet 10 is a guide slope that gradually decreases from the second protrusion 8 to the second arc-shaped part 103, so that the shoulder strap can be smoothly inserted into the second annular groove 7 through the opening 9. After being inserted, the shoulder strap is in a vertical state. Since the width W1 of the hook 203 is greater than the width W2 of the second annular groove 7, it can be ensured that the shoulder strap is always in the second annular groove 7 without the influence of external force and is not easy to fall off.

[0038] The angle α between the outer edges of the vertical bar 202 and the horizontal bar 201 is 85° to 89°, meaning the left side of the fastener is tilted, which is more ergonomic and easier to operate. At the same time, the angle b between the hook 203 and the inner edge of the vertical bar 202 is 85° to 89°, meaning the left side of the second annular groove 7 is also tilted. In actual use, this tilted structure helps guide the shoulder strap to fit naturally, reduces twisting and wear, and improves assembly efficiency and comfort.

[0039] The inner edge of the first annular groove 4 extends towards the outer edge of the fastener to form a first edging 12. The inner edge of the second annular groove 7 is provided with a second edging 11, and the thickness H1 of the second edging 11 is greater than the thickness H2 of the first edging 12. The thickness difference between the two is controlled between 0.3 mm and 1.0 mm. In actual use, this differentiated edging design not only enhances the structural strength of the annular part 1, making it more suitable for load-bearing and frequent pulling, but also takes into account the lightweight and flexibility of the hook part 2, so that the fastener can maintain good performance in different usage scenarios.

[0040] Furthermore, the outer edges of the fasteners all feature a smooth transition design, without sharp corners or burrs. In actual use, this design not only enhances the product's aesthetics but also effectively prevents scratches and damage to the user or clothing. It is especially suitable for personal items or children's products, balancing safety and durability.

[0041] Example 3

[0042] In an feasible technical solution, such as Figure 5 The fastener shown includes an annular portion 1 and a hook-shaped portion 2 connected to the annular portion 1. Specifically, it includes: a horizontal bar 201 extending from the first arc-shaped portion 102 in the same horizontal tangential direction, a vertical bar 202 connected to the horizontal bar 201, and a hook portion 203 connected to the vertical bar 202; a second annular groove 7 is formed between the hook-shaped portion 2 and the adjacent straight portion 101, and the second annular groove 7 is parallel to the first annular groove 4; the second annular groove 7 has an opening 9 on one side of the hook portion 203 to facilitate the insertion of the shoulder strap; an inlet portion 10 is provided extending from the second annular groove 7 and gradually decreasing towards the second arc-shaped portion 103, so that the shoulder strap can be smoothly inserted into the second annular groove 7 from the opening 9.

[0043] The difference between the above technical solution and Embodiment 2 is that the protrusion design on the second annular groove 7 is reduced. This is for shoulder straps made of special materials. After excessive friction and repeated pulling, such shoulder straps are prone to surface wear and even fatigue of the internal rubber bands. By reducing the protrusion on the second annular groove 7, the friction on the adjustment side is reduced, which can effectively reduce the physical damage of the shoulder strap during the adjustment process and extend the service life of the shoulder strap and the buckle itself.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A fastener for preventing detachment and stacking, comprising an annular portion and a hook-shaped portion connected in parallel with said annular portion, characterized in that, The annular portion is a rectangular closed loop, including two straight sections and a first arc-shaped portion and a second arc-shaped portion respectively connected between the front and rear ends of the straight sections; The hook-shaped portion includes: a horizontal bar extending from the first arc-shaped portion in the same horizontal tangential direction, a vertical bar connected to the horizontal bar, and a hook portion connected to the vertical bar; The annular portion has a first annular groove, the side of the first annular groove near the vertical bar is a smooth portion, and the side of the first annular groove away from the vertical bar has a first protrusion, the first protrusion having multiple I-shaped protrusions. A second annular groove is formed between the hook-shaped portion and the adjacent straight portion. The second annular groove has an opening on one side of the hook portion. A second protrusion is provided on the side of the second annular groove near the annular portion. The second protrusion has multiple trapezoidal protrusions. An inlet portion extends between the second protrusion and the second arc-shaped portion.

2. The fastener for preventing stacking and detachment according to claim 1, characterized in that, The I-shaped protrusions are arranged at equal intervals along the inner circumference of the first annular groove.

3. The fastener for preventing detachment and stacking according to claim 1, characterized in that, The inlet portion is a guide slope that gradually decreases from the second annular groove to the second arc-shaped portion.

4. The fastener for preventing detachment and stacking according to claim 1, characterized in that, The trapezoidal protrusions are arranged at equal intervals along the inner circumferential direction of the second annular groove.

5. A fastener for preventing stacking and detachment according to claim 1, characterized in that, The angle α between the outer edge of the vertical bar and the horizontal bar is 85° to 89°, and the angle b between the hook and the inner edge of the vertical bar is 85° to 89°.

6. A fastener for preventing stacking and detachment according to claim 1, characterized in that, The width W1 of the hook is greater than the width W2 of the second annular groove.

7. A fastener for preventing stacking and detachment according to claim 1, characterized in that, The inner edge of the first annular groove extends toward the outer edge of the fastener to form a first edging, and the inner edge of the second annular groove is provided with a second edging, and the thickness H1 of the second edging is greater than the thickness H2 of the first edging.

8. A fastener for preventing stacking and detachment according to claim 1, characterized in that, All fasteners have smooth transitions on their outer edges.

9. A fastener for preventing detachment and stacking according to claim 8, characterized in that, The fastener is integrally injection molded.

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