Non-return mechanism and lacing device

Abstract

The utility model relates to the field of tying belt knob tightness, in particular to a non-return mechanism which comprises an annular body, at least three inflection point portions are evenly arranged on the outer side of the annular body, a flexible arm is arranged on each inflection point portion in the direction surrounding the annular body in an extending mode, and an elastic gap is formed between each flexible arm and the annular body. The included angle between the two ends of the flexible arm and the circle center of the annular body ranges from 60 degrees to 110 degrees, and the free end of the flexible arm is provided with a non-return tooth part used for being clamped with an external tooth-shaped meshing face to achieve non-return. Stability is effectively improved, deformation of the non-return mechanism is further prevented, and a better non-return effect is achieved. On the basis, the utility model further provides a lacing device based on the same inventive concept.

Description

Technical Field

[0001] This utility model relates to the field of belt tightening and loosening, and more particularly to a non-reverse mechanism and a belt fastening device. Background Technology

[0002] Currently, the applicant has disclosed a strap-tying device in Chinese Patent Publication No. CN117413997B, comprising: a main body, a winding reel for winding the strap, an upper cover rotatably disposed on the main body, and a non-reverse mechanism for unidirectional rotation of the upper cover. The winding reel is rotatably disposed within the main body, and the upper cover and the winding reel can be switched between being connected or separated. The upper cover includes a cover body and side walls disposed around the periphery of the cover body, with a first engagement surface provided on the inner side of the side walls. The upper end face of the main body is provided with two or more sliding channels. The non-reverse mechanism includes two or more sliders that slide along the sliding channels and an elastic element for pressing the sliders outward from the main body. Each slider is provided with a first non-reverse tooth that engages with the first engagement surface to achieve locking. This solves the technical problems of poor stability, low strength, and short service life of existing strap-tying devices.

[0003] Among these, the anti-reverse mechanism typically determines the user experience of the product. Its effectiveness in preventing backflow, smoothness of rotation, and resistance to deformation are often key factors in evaluating the quality of the belt system. To improve the stability of the anti-reverse mechanism and further prevent deformation, the applicant has made corresponding improvements. Utility Model Content

[0004] Therefore, to address the aforementioned problems, this utility model proposes a backstop mechanism, which more effectively improves stability, further prevents deformation of the backstop mechanism, and achieves a better backstop effect. Based on this, a lacing device based on the same inventive concept is also proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a non-reverse mechanism, comprising an annular body, wherein at least three inflection points are evenly arranged on the outer side of the annular body, and a flexible arm extends along the direction surrounding the annular body on each inflection point, forming an elastic gap between the flexible arm and the annular body, wherein the angle between the two ends of the flexible arm and the center of the annular body is 60 to 110 degrees, and a non-reverse tooth is provided on the free end of the flexible arm for engaging with an external toothed meshing surface to achieve non-reverse operation.

[0006] Furthermore, the elastic gap between the flexible arm and the ring gradually increases from one end near the inflection point to the other end.

[0007] Furthermore, the outer sides of the three anti-reverse teeth are located on a concentric circle of the annular body.

[0008] Furthermore, the anti-reverse tooth portion has two anti-reverse teeth, the ends of the two anti-reverse teeth form a plane, the extended portions of the two planes have an intersection point, the intersection point is located within the annular body, and the intersection point formed by multiple anti-reverse teeth portions is located on a concentric circle of the annular body.

[0009] Furthermore, the annular body is provided with a relief recess at the location corresponding to the anti-reverse tooth, and the relief recess is used to accommodate the relief when the end of the flexible arm deforms.

[0010] Furthermore, the lower end of the annular body is provided with a connection mechanism for engaging with an external support component.

[0011] Furthermore, the connecting mechanism consists of two or more snap fasteners spaced apart.

[0012] A strapping device includes a main body for achieving strap winding, a backstop mechanism disposed on the upper end surface of the main body, and an upper cover connected to the main body to achieve winding drive. The upper cover has a toothed meshing surface on its inner side, and the backstop mechanism cooperates with the toothed meshing surface to achieve backstop. The backstop mechanism is the backstop mechanism described above.

[0013] Furthermore, the anti-reverse mechanism is detachably connected to the main body and is relatively fixed during connection.

[0014] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: This solution changes the overall deformation of the anti-reverse mechanism to achieve the purpose of anti-reverse and release. Utilizing the ring body as a support, more effective stability is achieved. The inflection point and flexible arm configuration provide better support during anti-reverse operation. Because the flexible arm is subjected to upward pressure, and this pressure creates an outward expanding force relative to the inflection point, the flexible arm pushes outward, thus forming a self-locking mechanism and achieving effective anti-reverse operation. During release, due to the flexible arm's length, the anti-reverse teeth at its end can more easily deflect towards the ring body, achieving effective release. Furthermore, because the swing of the flexible arm during release is relatively small, its fatigue wear is also less, resulting in a longer service life. The elastic gap between the flexible arm and the ring body gradually increases from the end near the inflection point to the other end, which also allows the flexible arm to have a better tendency to deflect outward during anti-reverse operation, achieving effective self-locking. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0016] Figure 2 yes Figure 1 Side view.

[0017] Figure 3 This is a three-dimensional structural diagram of Embodiment 1 of this utility model.

[0018] Figure 4 This is a three-dimensional structural schematic diagram from another perspective of Embodiment 1 of this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the lacing device according to Embodiment 2 of this utility model.

[0020] Figure 6 This is a schematic diagram of the anti-reverse mechanism and the main body in embodiment two of this utility model.

[0021] Figure 7 This is a cross-sectional structural diagram of Embodiment 2 of this utility model.

[0022] Figure 8 This is a schematic diagram of the anti-reverse mechanism and the upper cover in embodiment two of this utility model.

[0023] Figure 9 This is an exploded structural diagram of Embodiment 2 of this utility model.

[0024] Figure label:

[0025] 1. Anti-reverse mechanism; 11. Ring body; 11. Avoidance recess; 12. Inflection point; 13. Flexible arm; 14. Elastic gap; 15. Anti-reverse tooth; 151. Anti-reverse tooth; 16. Connecting mechanism; 2. Main body; 21. Locking part; 3. Top cover; 31. Toothed meshing surface; 32. Connector; 33. Locking part. Detailed Implementation

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0027] refer to Figures 1 to 4 This embodiment provides a backstop mechanism, including an annular body 11. At least three inflection points 12 are evenly arranged on the outer side of the annular body 11. A flexible arm 13 extends from each inflection point 12 along the direction surrounding the annular body 11. An elastic gap 14 is formed between the flexible arm 13 and the annular body 11. The angle α between the two ends of the flexible arm 13 and the center of the annular body 11 is 60 to 110 degrees, preferably 90 degrees or 100 degrees. A backstop tooth 15 is provided on the free end of the flexible arm 13 for engaging with an external toothed meshing surface 31 to achieve backstop.

[0028] This design modifies the overall deformation of the anti-reverse mechanism 1 to achieve both anti-reverse and release functions. Utilizing the annular body 11 as a support, it achieves more effective stability. The inflection point 12 and flexible arm 13 provide better support during anti-reverse operation. Because the flexible arm 13 is subjected to upward pressure, and this pressure creates an outward expanding force relative to the inflection point 12, it pushes the flexible arm 13 outward, thus forming a self-locking mechanism and achieving effective anti-reverse operation. During release, due to the length of the flexible arm 13, the anti-reverse tooth 15 at its end can more easily deflect and approach the annular body 11, achieving effective release. Furthermore, because the swing of the flexible arm 13 during release is relatively small, its fatigue wear is also lower, resulting in a longer service life. Figure 1 The solid arrow shown illustrates the force exerted during reversal.

[0029] The elastic gap 14 between the flexible arm 13 and the annular body 11 gradually increases from one end near the inflection point 12 to the other end. This is also to ensure that the flexible arm 13 has a better tendency to deflect outward during anti-reverse operation, thus achieving effective self-locking.

[0030] The outer sides of the three anti-reverse teeth 15 are located on a concentric circle of the annular body 11. This is for balance, so that the three anti-reverse teeth can simultaneously achieve the anti-reverse function, thereby improving the stability of the anti-reverse mechanism 1 and effectively increasing its service life.

[0031] The anti-reverse tooth portion 15 has two anti-reverse teeth 151, the ends of which form planes. The delayed portions of the two planes intersect at a point located within the annular body 11. Furthermore, the intersection point formed by multiple anti-reverse teeth 15 is located on a concentric circle of the annular body 11. This arrangement aims to prevent the two anti-reverse teeth 151 from forming parallel opposing forces, which would cause the flexible arm 13 to experience strong compressive force, rather than guiding the flexible arm 13 to push outwards to achieve self-locking.

[0032] A clearance recess 11 is provided on the annular body 11 at a position corresponding to the anti-reverse tooth 15. The clearance recess 11 is used to accommodate the deformation of the end of the flexible arm 13. The clearance recess 11 is mainly used to give the anti-reverse tooth 15 a larger clearance space, thereby reducing the friction between the anti-reverse tooth 151 and the external toothed meshing surface 31 and reducing wear.

[0033] The lower end of the annular body 11 is provided with a connecting mechanism 16 for engaging with an external support component. The connecting mechanism 16 consists of two or more latches spaced apart. The connecting mechanism 16 ensures that the annular body 11 is effectively fixed.

[0034] In addition, based on the aforementioned anti-reverse mechanism 1, and referring to... Figures 5 to 9This second embodiment also proposes a strapping device, including a main body 2 for achieving strap winding, a reverse-stop mechanism 1 disposed on the upper surface of the main body 2, and an upper cover 3 connected to the main body 2 to achieve winding drive. A toothed meshing surface 31 is provided on the inner side of the upper cover 3. The reverse-stop mechanism 1 cooperates with the toothed meshing surface 31 to achieve reverse-stop. The reverse-stop mechanism 1 is the same as the reverse-stop mechanism 1 in the first embodiment described above. The reverse-stop mechanism 1 is detachably connected to the main body 2 and is relatively fixed during connection.

[0035] In this design, the upper cover 3 engages with the connecting member 32 via a snap-fit ​​component 33, thereby driving the strap winding. The connecting member 32 passes through the hollow portion of the annular body 11 of the anti-reverse mechanism 1. The main body 2 is provided with a locking part 21 for snap-fit ​​connection with the connecting mechanism 16 in the anti-reverse mechanism 1. In this design, the structures of the main body 2 and the upper cover 3 are existing technologies; the only distinguishing feature of the cooperation between the main body 2, the upper cover 3, and the anti-reverse mechanism 1 is the snap-fit ​​connection between the locking part 21 and the connecting mechanism 16; the rest are also existing technologies. The structure of the anti-reverse mechanism 1 is the distinguishing technology.

[0036] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A non-reverse check mechanism, characterized in that: It includes an annular body, on the outer side of which at least three inflection points are evenly arranged. Each inflection point has a flexible arm extending along the direction surrounding the annular body. An elastic gap is formed between the flexible arm and the annular body. The angle between the two ends of the flexible arm and the center of the annular body is 60 to 110 degrees. The free end of the flexible arm is provided with a non-reverse tooth for engaging with an external toothed surface to achieve non-reverse operation.

2. The anti-reverse mechanism according to claim 1, characterized in that: The elastic gap between the flexible arm and the ring gradually increases from one end near the inflection point to the other end.

3. The anti-reverse mechanism according to claim 2, characterized in that: The outer sides of the three anti-reverse teeth are located on a concentric circle of the annular body.

4. The anti-reverse mechanism according to claim 1, characterized in that: The anti-reverse tooth portion has two anti-reverse teeth, the ends of the two anti-reverse teeth form a plane, the extended portions of the two planes have an intersection point, the intersection point is located within the annular body, and the intersection point formed by multiple anti-reverse teeth portions is located on a concentric circle of the annular body.

5. The anti-reverse mechanism according to claim 1, characterized in that: The annular body is provided with a relief recess at the location corresponding to the anti-reverse tooth, and the relief recess is used to accommodate the relief when the end of the flexible arm deforms.

6. The anti-reverse mechanism according to claim 1, characterized in that: The lower end of the ring-shaped body is provided with a connection mechanism for engaging with external support components.

7. A check valve mechanism according to claim 6, characterized in that: The connecting mechanism consists of two or more buckles spaced apart.

8. A strapping device, comprising a main body for achieving strap winding, a backstop mechanism disposed on the upper end face of the main body, and an upper cover connected to the main body for achieving winding drive, wherein a toothed meshing surface is provided on the inner side of the upper cover, and the backstop mechanism cooperates with the toothed meshing surface to achieve backstop, characterized in that: The anti-reverse mechanism is the anti-reverse mechanism described in any one of claims 1 to 7.

9. A lacing device according to claim 8, characterized in that: The anti-reverse mechanism is detachably connected to the main body and is relatively fixed when connected.

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