Lobster buckle with anti-falling pin shaft

Abstract

The lobster buckle comprises a buckle body, a through hole is formed in the buckle body, the buckle body is rotationally connected with a shifting fork through the pin shaft, the shifting fork is elastically connected to the buckle body through a torsional spring, the end of the pin shaft in the axis direction is connected to the buckle body in a welded mode, and the pin shaft is fixed to the buckle body in a welded mode to achieve falling prevention. Or screw rods are arranged at the two ends of the pin shaft in the axis direction and are in threaded connection with anti-falling caps, the minimum outer diameter of each anti-falling cap is larger than the diameter of the through hole, and the anti-falling caps limit axial movement of the pin shaft to achieve falling prevention; or the two ends of the pin shaft are fixedly connected with anti-falling pieces capable of being bent outwards and inwards respectively, the outer ends of the anti-falling pieces bent outwards can abut against the buckle body, and the anti-falling pieces limit axial movement of the pin shaft to achieve falling prevention. Or the pin shaft comprises a thread part, a screwing part and a shaft body, the outer diameter of the shaft body is larger than that of the thread part, the outer diameter of the screwing part is larger than that of the shaft body, a spring washer is arranged between the screwing part and the buckle body, and the pin shaft screwed on the buckle body is prevented from loosening and falling off through the spring washer.

Description

Technical Field

[0001] The utility model relates to the technical field of lobster clasps, in particular to a lobster clasp with an anti-dropping pin shaft. Background Art

[0002] Lobster clasps are widely used in people's daily lives as convenient connectors. The lobster clasp structurally includes a clasp body, a fork, a pin and a torsion spring, wherein the fork is also called a chip or a wrench, and the clasp body has an opening. By turning the fork to rotate around the pin, the opening of the clasp body can be blocked and opened. The torsion spring resets the fork through its own elastic properties, and the opening of the clasp body is blocked by the fork in a natural state. The Chinese utility model patent CN220275054U discloses a lobster clasp chip that rotates without falling off the pin, and blocks are provided at the upper and lower positions of the pin, and the distance from the axis of the pin to the end of the block is greater than the radius of the through hole, so that the pin is not easy to fall from the through hole on the lobster clasp chip body. The inventor found that when assembling a lobster clasp using such a pin, the pin needs to be hammered through the through hole until the through hole is located between the upper and lower layers of the card blocks. When the hammering force is too large, it is easy for both layers of the card blocks to pass through the through hole. The hammering force needs to be controlled, especially when the lobster clasp is small. There is an urgent need for a lobster clasp with an anti-drop pin that can easily allow the pin to pass through the fork and the clasp body and prevent the pin from falling out of the clasp body. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a lobster buckle with an anti-drop pin shaft, which enables the pin shaft to pass through the shift fork and the buckle body conveniently and prevents the pin shaft from falling out of the buckle body.

[0004] In order to solve the above technical problems, the utility model comprises a buckle body, the buckle body is provided with a through hole penetrating the buckle body, the lower part of the buckle body is provided with a hanging ring, the buckle body is rotatably connected with a shift fork through a pin shaft provided in the through hole, the shift fork is elastically connected to the buckle body through a torsion spring provided on the pin shaft in the middle part, and its structural characteristics are: one end or both ends of the pin shaft in the axial direction are connected to the buckle body by welding;

[0005] Or screws with an outer diameter smaller than the diameter of the pin are respectively provided at both ends of the pin axis direction, and each screw is screwed with an anti-dropping cap that can abut against the buckle body at one end, and the minimum outer diameter of the anti-dropping cap is larger than the diameter of the through hole;

[0006] Or at least one anti-slip sheet capable of being bent outward and inward is fixedly connected to both ends of the pin shaft in the axial direction, and the outer end of the anti-slip sheet bent outward can abut against the buckle body;

[0007] Or the pin shaft includes a threaded portion screwed on the buckle body, a screwing portion located outside the buckle body, and a shaft body located between the threaded portion and the screwing portion, the through hole has an internal thread section adapted to the threaded portion and a smooth section to avoid the screwing portion, the outer diameter of the shaft body is larger than the outer diameter of the threaded portion, the outer diameter of the screwing portion is larger than the outer diameter of the shaft body, and the shaft body is equipped with a spring washer located between the screwing portion and the buckle body.

[0008] After adopting the above structure, the pin shaft passes through the shift fork and the buckle body and is fixed to the buckle body by welding the end portions. The stable connection of the pin shaft on the buckle body is guaranteed by welding, thereby preventing the pin shaft from falling out of the buckle body. By providing an anti-dropout cap and a screw, the anti-dropout cap is screwed on the screw after the pin shaft passes through the shift fork and the buckle body, and the anti-dropout caps located at both ends of the axial direction of the pin shaft limit the axial movement of the pin shaft, thereby preventing the pin shaft from falling out of the buckle body. By providing an anti-dropout sheet, after the pin shaft passes through the shift fork, the anti-dropout caps located at both ends of the axial direction of the pin shaft are bent. The outer end of the anti-slip sheet is pressed against the buckle body, and the anti-slip sheets at both ends of the pin shaft in the axial direction limit the movement of the pin shaft in the axial direction, thereby preventing the pin shaft from falling out of the buckle body; by setting a threaded portion, a screwing portion and a shaft body, the shaft body is used to carry the shift fork and the torsion spring. After the threaded portion is screwed into the buckle body, the two sides of the spring washer are respectively pressed against the buckle body and the screwing portion, and the elastic performance of the spring washer has an anti-loosening effect on the pin shaft. The threaded portion and the spring washer make the pin shaft firmly screwed to the buckle body, thereby preventing the pin shaft from falling out of the buckle body. When the pin shaft is inserted into the shift fork and the buckle body, the pin shaft can be directly inserted into the shift fork and the buckle body without hindrance, and then the anti-slip cap or the anti-slip sheet is welded or screwed; or the pin shaft that passes through the shift fork without hindrance is inserted into the buckle body through the threaded portion, so the pin shaft can pass through the shift fork and the buckle body conveniently.

[0009] Furthermore, the screwing portion is provided with a screwing groove recessed toward the shaft body. By providing the screwing groove, one end of the screwing tool is inserted into the screwing groove, and then the screwing tool is rotated to rotate the pin shaft, thereby improving the convenience of installing and removing the pin shaft.

[0010] Furthermore, the hanging ring includes a ring body connected to the buckle body, the ring body has an opening, and the two ends of the ring body have accommodating cavities. The ring body is elastically connected to a blocking block for blocking the opening through at least one compression spring arranged in the accommodating cavity, and the blocking block is provided with a gripping handle. By providing the ring body, the blocking block and the compression spring, the opening of the ring body is opened by holding the gripping handle and moving the blocking block, so that objects can be conveniently hung on the ring body. At this time, the compression spring is compressed. After the gripping handle is released, the blocking block returns to its position under the resetting and rebounding action of the compression spring to complete the blocking of the ring body opening.

[0011] Furthermore, a threaded sleeve is fixedly connected to the outer surface of the ring body, and the threaded sleeve is threadedly connected with a clamping screw having one end that can pass through the ring body to abut against the blocking block. By providing the threaded sleeve and the clamping screw, one end of the clamping screw can abut against the blocking block to complete the clamping and locking of the blocking block, thereby preventing the blocking block from loosening to the point where it is difficult to close the ring body opening due to the attenuation of the elastic performance of the compression spring.

[0012] In summary, the utility model has the advantages of convenient use, reasonable structure, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0014] Figure 2 yes Figure 1 A partial enlarged view of area A in the middle;

[0015] Figure 3 yes Figure 1 Structural diagram of explosion effect;

[0016] Figure 4 It is a structural schematic diagram of the second embodiment of the utility model;

[0017] Figure 5 It is a schematic diagram of the structure of the pin shaft, the screw rod and the anti-drop cap;

[0018] Figure 6 It is a structural schematic diagram of the third embodiment of the utility model;

[0019] Figure 7 It is a structural schematic diagram of the pin shaft and the anti-drop sheet;

[0020] Figure 8 It is a structural schematic diagram of the fourth embodiment of the utility model;

[0021] Fig. 9 It is a schematic structural diagram of a pin shaft in a fourth embodiment of the utility model;

[0022] Fig.10 It is a structural schematic diagram of the fifth embodiment of the utility model;

[0023] Fig.11 yes Fig.10 A structural schematic diagram of a half-section effect;

[0024] Fig.12 It is a schematic diagram of the structure of the circle;

[0025] In the figure: 1. buckle body; 11. through hole; 12. hanging ring; 121. ring body; 1211. accommodating chamber; 122. compression spring; 123. blocking block; 124. holding handle; 2. pin shaft; 21. threaded portion; 22. screwing portion; 221. screwing groove; 23. shaft body; 3. shift fork; 4. torsion spring; 5. screw rod; 51. anti-drop cap; 6. anti-drop sheet; 7. spring washer; 8. threaded sleeve; 81. tightening screw. DETAILED DESCRIPTION

[0026] The present invention will now be further described in detail in conjunction with the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention. Example 1

[0027] Reference Figures 1 to 3 The utility model comprises a buckle body 1, which is provided with a through hole 11 penetrating the buckle body 1, and a hanging ring 12 is provided at the lower part of the buckle body 1. The buckle body 1 is rotatably connected to a shift fork 3 through a pin shaft 2 provided in the through hole 11. The shift fork 3 is elastically connected to the buckle body 1 through a torsion spring 4 provided in the middle part on the pin shaft 2, and one or both ends of the pin shaft 2 in the axial direction are connected to the buckle body 1 by welding. In this embodiment, the pin shaft 2 passes through the buckle body 1 and the shift fork 3 and is fixed to the buckle body 1 by welding at the end. The stable connection of the pin shaft 2 on the buckle body 1 is ensured by welding, and the pin shaft 2 is prevented from falling out of the buckle body 1. Example 2

[0028] Reference Figure 4 and Figure 5 , which provides another embodiment, the basic structure is the same as the above structure, specifically, the structure for preventing the pin shaft 2 from falling out of the buckle body 1 in this embodiment is different, and the specific structure is: screws 5 with an outer diameter smaller than the diameter of the pin shaft 2 are respectively provided at both ends of the axial direction of the pin shaft 2, and each screw shaft 5 is screwed with an anti-dropout cap 51 with one end that can abut on the buckle body 1, and the minimum outer diameter of the anti-dropout cap 51 is larger than the diameter of the through hole 11. By providing the anti-dropout cap 51 and the screw rod 5, the pin shaft 2 passes through the fork 3 and the anti-dropout cap 51 is screwed on the screw rod 5, and the anti-dropout cap 51 located at both ends of the axial direction of the pin shaft 2 limits the axial movement of the pin shaft 2, thereby preventing the pin shaft 2 from falling out of the buckle body 1. Example 3

[0029] Reference Figure 6 and Figure 7, which provides another embodiment, the basic structure is the same as the above structure, specifically, the structure for preventing the pin shaft 2 from falling out of the buckle body 1 in this embodiment is different, and the specific structure is: at least one anti-slip sheet 6 that can be bent outward and inward is fixedly connected to the two ends of the pin shaft 2 in the axial direction, the inward direction is toward the direction close to the central axis of the pin shaft 2, and the outward direction is toward the direction away from the central axis of the pin shaft 2. The outer end of the anti-slip sheet 6 after bending outward can be against the buckle body 1, and the outer end of the anti-slip sheet 6 is the end away from the pin shaft 2. The anti-slip sheet 6 can be made of a metal sheet or a non-metallic material such as thermoplastic polyethylene and polypropylene. After the pin shaft 2 passes through the shift fork 3, the anti-slip sheets 6 at the two ends of the pin shaft 2 in the axial direction are bent, so that the outer ends of the anti-slip sheets 6 are against the buckle body 1, and the anti-slip sheets 6 at the two ends of the pin shaft 2 in the axial direction limit the axial movement of the pin shaft 2, thereby preventing the pin shaft 2 from falling out of the buckle body 1. Example 4

[0030] Reference Figure 8 and Fig. 9 , which provides another embodiment, the basic structure is the same as the above structure, specifically, the structure for preventing the pin shaft 2 from coming out of the buckle body 1 is different in this embodiment, the specific structure is: the pin shaft 2 includes a threaded portion 21 screwed on the buckle body 1, a screwing portion 22 located outside the buckle body 1 and a shaft body 23 located between the threaded portion 21 and the screwing portion 22, the outer diameter of the shaft body 23 is larger than the outer diameter of the threaded portion 21, the outer diameter of the screwing portion 22 is larger than the outer diameter of the shaft body 23, and the shaft body 23 is penetrated with a spring washer 7 located between the screwing portion 22 and the buckle body 1. The through hole 11 has an internal thread section adapted to the threaded portion 21 and a smooth section avoiding the screwing portion 22, and the screwing portion 22 is provided with a screwing groove 221 recessed toward the shaft body 23. The screwing groove 221 can be straight or cross-shaped. By providing the threaded portion 21, the screwing portion 22 and the shaft body 23, the shaft body 23 is used to carry the shift fork 3 and the torsion spring 4. After the threaded portion 21 is screwed into the buckle body 1, the two sides of the spring washer 7 are respectively against the buckle body 1 and the screwing portion 22, and the elastic performance of the spring washer 7 has a loosening prevention effect on the pin shaft 2. The threaded portion 21 and the spring washer 7 make the pin shaft 2 firmly screwed to the buckle body 1, thereby preventing the pin shaft 2 from falling out of the buckle body 1. By providing the screwing groove 221, one end of a screwdriver or other screwing tool is inserted into the screwing groove 221, and then the screwing tool is rotated to rotate the pin shaft 2, thereby improving the convenience of installing and removing the pin shaft 2.

[0031] When the pin shaft 2 is inserted into the shift fork 3 and the buckle body 1, the pin shaft 2 can be directly inserted into the shift fork 3 and the buckle body 1 without hindrance, and then the anti-dropout cap 51 is welded or screwed or the anti-dropout sheet 6 is bent; or the pin shaft 2 that passes through the shift fork 3 is inserted into the buckle body 1 through the threaded portion 21 without hindrance, so the pin shaft 2 can easily pass through the shift fork 3 and the buckle body 1. Example 5

[0032] Reference Fig.10 and Fig.12 , which provides another embodiment, the basic structure is the same as the above structure, specifically, the structure of the hanging ring 12 in this embodiment is different, and the specific structure is: the hanging ring 12 includes a ring body 121 connected to the buckle body 1, the ring body 121 has an opening, and the two ends of the ring body 121 have a receiving cavity 1211. The ring body 121 is elastically connected to a blocking block 123 for blocking the opening through at least one compression spring 122 arranged in the receiving cavity 1211, and the blocking block 123 is provided with a gripping handle 124. By providing the ring body 121, the blocking block 123 and the compression spring 122, the opening of the ring body 121 is opened by holding the gripping handle 124 and moving the blocking block 123, so that the objects can be conveniently hung on the ring body 121. At this time, the compression spring 122 is compressed. After the gripping handle 124 is released, the blocking block 123 returns to its position under the resetting and rebounding action of the compression spring 122 to complete the blocking of the opening of the ring body 121. The outer surface of the ring body 121 is fixed with a threaded sleeve 8, and the threaded sleeve 8 is threaded with a clamping screw 81 that can pass through the ring body 121 to abut against the blocking block 123. By providing the threaded sleeve 8 and the clamping screw 81, one end of the clamping screw 81 can abut against the blocking block 123, thereby completing the compression and locking of the blocking block 123, and preventing the blocking block 123 from loosening to the point where it is difficult to close the opening of the ring body 121 due to the attenuation of the elastic performance of the compression spring 122.

[0033] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims of this patent, they should all fall within the protection scope of the utility model.

Claims

1. A lobster clasp with an anti-drop pin, comprising a clasp body (1), the clasp body (1) being provided with a through hole (11) penetrating the clasp body (1), a hanging ring (12) being provided at the lower part of the clasp body (1), the clasp body (1) being rotatably connected to a shift fork (3) via a pin (2) provided in the through hole (11), the shift fork (3) being elastically connected to the clasp body (1) via a torsion spring (4) having a middle part passing through the pin (2), wherein: One or both ends of the pin shaft (2) in the axial direction are connected to the buckle body (1) by welding; Or screw rods (5) with an outer diameter smaller than the diameter of the pin shaft (2) are respectively provided at both ends of the pin shaft (2) in the axial direction, and each screw rod (5) is screwed with an anti-drop cap (51) at one end of which can abut against the buckle body (1), and the minimum outer diameter of the anti-drop cap (51) is larger than the diameter of the through hole (11); Or at least one anti-slip sheet (6) capable of being bent outwardly and inwardly is fixedly connected to both ends of the pin shaft (2) in the axial direction, and the outer end of the anti-slip sheet (6) bent outwardly can abut against the buckle body (1); Or the pin shaft (2) comprises a threaded portion (21) screwed onto the buckle body (1), a screwing portion (22) located outside the buckle body (1), and a shaft body (23) located between the threaded portion (21) and the screwing portion (22); the through hole (11) comprises an internal thread section adapted to the threaded portion (21) and a smooth section avoiding the screwing portion (22); the shaft body (23) has an outer diameter greater than that of the threaded portion (21); the screwing portion (22) has an outer diameter greater than that of the shaft body (23); and the shaft body (23) is provided with a spring washer (7) located between the screwing portion (22) and the buckle body (1).

2. The lobster clasp with an anti-drop pin according to claim 1, characterized in that: The screwing portion (22) is provided with a screwing groove (221) recessed toward the shaft body (23).

3. The lobster clasp with an anti-drop pin according to claim 1, characterized in that: The hanging ring (12) comprises a ring body (121) connected to the buckle body (1), the ring body (121) having an opening, and two ends of the ring body (121) having accommodating cavities (1211), the ring body (121) being elastically connected to a blocking block (123) for blocking the opening via at least one compression spring (122) disposed in the accommodating cavity (1211), and the blocking block (123) being provided with a gripping handle (124).

4. The lobster clasp with an anti-drop pin according to claim 3, characterized in that: A threaded sleeve (8) is fixedly connected to the outer surface of the ring body (121), and the threaded sleeve (8) is threadedly connected to a clamping screw (81) having one end that can pass through the ring body (121) and abut against the blocking block (123).

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