Self-locking folding joint

Abstract

The utility model provides a self-locking type folding connector which comprises an upper connector, a lower connector, a handle and an ejector rod, one side of the upper connector is hinged to one side of the lower connector, one end of the handle is hinged to the other side of the lower connector, the ejector rod is rotatably hinged to the handle, one end of the ejector rod abuts against the upper connector, and the other end of the ejector rod abuts against the lower connector. The handle is provided with a self-locking mechanism, the self-locking mechanism comprises a sliding buckle and a reset spring, the reset spring is arranged between the handle and the sliding buckle, when the reset spring drives the sliding buckle to reset, the sliding buckle abuts against one end of the ejector rod, and when the sliding buckle overcomes the elastic force of the reset spring to move and is separated from the ejector rod, the handle can be opened in a rotating mode. According to the self-locking type folding connector, the sliding buckle and the ejector rod are matched for self-locking, operation is convenient, and safety is high.

Description

Technical Field

[0001] This utility model relates to the field of locking mechanisms for mechanical connections, and more specifically, to a self-locking folding joint. Background Technology

[0002] Existing foldable devices such as folding bicycles and folding electric bikes all use self-locking folding joints with quick-release structures at their folding connection points. This allows for quick folding, disassembly, and even locking of the folding connection points, reducing the size of the folding bicycle and facilitating storage or transportation.

[0003] For example, Chinese Patent 201120182082.8 discloses a locking mechanism and folding connector, including an upper folding part and a lower folding part. The annular body of its pull ring extends between a pair of lugs on the handle. An eccentric cam passes through the eccentric holes of the lugs to mount the pull ring onto the eccentric cam. A pin passes through the pivot hole of the eccentric cam. Through the structure where the outer contour of the eccentric cam directly matches the lug holes on the handle, rotating the handle directly drives the eccentric cam to rotate. This folding connector is locked directly through the eccentric handle, which is not secure enough in the closed state. Furthermore, the eccentric handle lacks a self-locking mechanism, making it prone to accidental activation during riding and resulting in accidents, thus posing a safety risk. Utility Model Content

[0004] The purpose of this utility model is to provide a self-locking folding connector, which uses a sliding buckle to cooperate with the top rod for self-locking, making it easy to operate and highly safe.

[0005] The technical solution adopted by the self-locking folding joint disclosed in this utility model is:

[0006] A self-locking folding connector includes an upper connector, a lower connector, a handle, and a push rod. One side of the upper connector is hinged to one side of the lower connector. One end of the handle is hinged to the other side of the lower connector. The push rod is rotatably hinged to the handle, and one end of the push rod abuts against the upper connector. The handle is provided with a self-locking mechanism, which includes a sliding buckle and a return spring. The return spring is located between the handle and the sliding buckle. When the return spring drives the sliding buckle to return to its original position, the sliding buckle presses against one end of the push rod. When the sliding buckle moves against the elastic force of the return spring and disengages from the push rod, the handle can be rotated open.

[0007] As a preferred embodiment, the device also includes a compression spring. The push rod has a mounting hole, one end of which is located in the mounting hole, and the other end of which abuts against the inside of the handle. The spring force of the compression spring causes the push rod to be tilted and hinged to the handle.

[0008] As a preferred scheme, one end of the top rod is provided with an abutting part, the other end of the top rod is provided with a pressing part, the slide buckle is provided with a pressing part, a limiting part and a rod part, when the reset spring drives the slide buckle to reset, the abutting part and the rod part abut.

[0009] As a preferred scheme, the handle is provided with a window, the slide buckle is movably arranged on the window, the pressing part extends out of the window and is arranged on the outside of the handle, one side of the window is provided with a clamping part, and the limiting part is clamped with the clamping part when the reset spring drives the slide buckle to reset.

[0010] As a preferred scheme, one end of the abutting part and the rod part abutting each other is provided with a circular arc surface.

[0011] As a preferred scheme, the slide buckle is provided with a mounting groove, a retaining ring is clamped and connected on the mounting groove, and one end of the retaining ring abuts against the inside of the handle.

[0012] As a preferred scheme, the upper joint is provided with a protrusion, the protrusion is provided with a pressing part, and the pressing part abuts against the pressing part of the top rod.

[0013] As a preferred scheme, the pressing part is provided with a circular arc protrusion, and the pressing part is provided with a circular arc groove matched with the circular arc protrusion.

[0014] As a preferred scheme, the pressing part is provided with a circular arc groove, and the pressing part is provided with a circular arc protrusion matched with the circular arc groove.

[0015] As a preferred scheme, one side of the protrusion is screwed with a machine screw, and one end of the machine screw abuts against the pressing part.

[0016] The self-locking folding joint has the beneficial effects that: when the upper joint and the lower joint are locked and closed, the top rod is obliquely hinged to the handle, rotating the handle makes the circular arc groove of the top rod tightly match the circular arc protrusion of the pressing part, the top rod can stably press the pressing part by overcoming the elastic force of the compression spring, the upper joint and the lower joint are completely locked, the locking force is more uniformly distributed, the stability and reliability of the connection are improved; under the locking state, the rod part of the slide buckle abuts against the abutting part of the top rod under the action of the reset spring, the rotation of the top rod to the inner wall of the handle is prevented, and the self-locking effect is realized.

[0017] When unlocking, only the pressing part of the slide buckle is pushed, the rod part of the slide buckle is separated from the abutting part of the top rod, the compression spring is recovered, the extrusion between the top rod and the pressing part is gradually released, the upper joint and the lower joint are completely opened, the overall operation is simple and convenient, and the use convenience is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the three-dimensional schematic view of the self-locking folding joint.

[0019] Figure 2 is the explosion schematic view of the self-locking folding joint.

[0020] Figure 3 is the cross-sectional schematic view of the self-locking folding joint.

[0021] Figure 4 is the structure schematic view of the sliding buckle in the self-locking folding joint.

[0022] Figure 5 is the structure schematic view of the top rod in the self-locking folding joint. DETAILED DESCRIPTION

[0023] The utility model will be further described and explained in combination with specific embodiments and the drawings of the specification:

[0024] Reference Figures 1 to 3 A self-locking folding joint, including upper joint 10, lower joint 20, handle 30 and top rod 40, one side of upper joint 10 is hingedly connected with one side of lower joint 20, one end of handle 30 is hingedly connected to the other side of lower joint 20, top rod 40 is rotatably hingedly connected to handle 30, and one end of top rod 40 abuts against upper joint 10.

[0025] The upper joint 10 is provided with a first hinged lug 12, the lower joint 20 is provided with a second hinged lug 21, the first hinged lug 12 and the second hinged lug 21 are both provided with a hinge hole, a hinge shaft 60 is movably arranged in the hinge hole, and the first hinged lug 12 and the second hinged lug 21 are hingedly connected through the hinge shaft 60.

[0026] The upper joint 10 is provided with a protrusion 11, the protrusion 11 is provided with a threaded hole, and the top tightener 111 is installed on the protrusion 11 through the threaded hole. The position of the top tightener 111 can be conveniently adjusted through the threaded hole, and the fastening degree of the top tightener 111 abutting against the top rod 40 is changed. When the height of the top tightener 111 is higher, the contact pressure between the top tightener 111 and the top rod 40 is greater, so that more compact fixation is realized. Conversely, when the height of the top tightener 111 is reduced, the contact pressure is reduced, and the fastening degree is also weakened. This design can flexibly adjust the fastening force according to actual needs, and has stronger applicability.

[0027] In the embodiment, the top fastener 111 is provided with a circular arc protrusion, and the top rod 40 is provided with a circular arc groove matched with the circular arc protrusion. The circular arc protrusion of the top fastener 111 abuts against the circular arc groove of the top rod 40. The matching of the circular arc protrusion and the circular arc groove increases the contact area, so that the top fastening force generated by the top rod 40 is more evenly distributed, and the locking reliability is improved.

[0028] In another embodiment, the top fastener 111 is provided with a circular arc groove, and the top rod 40 is provided with a circular arc protrusion matched with the circular arc groove. The protrusions provided on the top fastener 111 and the top rod 40 are not limited to the circular arc shape. The selected circular arc shape is relatively easy to process, and can be better aligned during assembly, reducing assembly errors.

[0029] One side of the protrusion 11 is screwed with a machine screw 112, one end of the machine screw 112 abuts against the top fastener 111, and the arrangement of the machine screw 112 can ensure the stability of the top fastener 111 during use, preventing the top fastener 111 from loosening due to vibration or other external forces, thereby prolonging the service life.

[0030] The other side of the lower connector 20 is provided with a third hinged lug 22, and the third hinged lug 22 is provided with a hinge hole. A hinge shaft 60 is movably arranged in the hinge hole. One end of the handle 30 is provided with an eccentric cam 33, and the eccentric cam 33 is provided with an eccentric hole. The hinge shaft 60 passes through the eccentric hole to form a hinged connection with the third hinged lug 22 through the hinge shaft 60.

[0031] The handle 30 is provided with a self-locking mechanism 31, which includes a sliding buckle 311 and a return spring 312. The return spring 312 is arranged between the handle 30 and the sliding buckle 311. When the return spring 312 drives the sliding buckle 311 to reset, the sliding buckle 311 abuts against one end of the top rod 40. When the sliding buckle 311 moves away from the top rod 40 by overcoming the elastic force of the return spring 312, the handle 30 can be rotated and opened.

[0032] The handle 30 is provided with a window 32, and the sliding buckle 311 is movably arranged on the window 32. The pressing part 3111 extends out of the window 32 and is arranged outside the handle 30. One side of the window 32 is provided with a clamping part 321. When the return spring 312 drives the sliding buckle 311 to reset, the limiting part 3112 cooperates with the clamping part 321 to clamp tightly, preventing the sliding buckle 311 from loosening or shifting.

[0033] When the upper joint 10 and the lower joint 20 need to be opened, the user can overcome the elastic force of the reset spring 312 by applying an external force to make the slide buckle 311 disengage from the top rod 40, so that the handle 30 can be rotated to open, which is simple and convenient to operate, and when the locking needs to be closed, the automatic reset function of the reset spring 312 can ensure that the folding joint can automatically recover to the locked state after each operation.

[0034] The self-locking folding joint further comprises a compression spring 50, the top rod 40 is provided with a mounting hole 41, one end of the compression spring 50 is arranged in the mounting hole 41, and the other end of the compression spring 50 abuts against the inner side of the handle 30. The elastic force of the compression spring 50 makes the top rod 40 be obliquely hinged on the handle 30.

[0035] In order to further optimize the inclination angle and stability of the top rod 40, the top rod 40 can maintain an optimal inclination angle through the elastic force of the compression spring 50, so as to optimize the contact effect of the top rod 40 and the upper joint 10, enhance the locking force, and improve the stability of the self-locking folding joint.

[0036] Reference Figure 4 And Figure 5 One end of the top rod 40 is provided with an abutting portion 42, the other end of the top rod 40 is provided with a pressing portion 43, the slide buckle 311 is provided with a pressing portion 3111, a limiting portion 3112 and a rod portion 3113, and when the reset spring 312 drives the slide buckle 311 to reset, the abutting portion 42 and the rod portion 3113 abut against each other.

[0037] One end of the abutting portion 42 and the rod portion 3113 abutting against each other is provided with a circular arc surface, so that the contact between the abutting portion 42 and the rod portion 3113 is smoother, the friction is reduced, and the stability of movement is improved.

[0038] The slide buckle 311 is provided with a mounting groove 3114, the mounting groove 3114 is clamped and connected with a blocking ring 70, one end of the blocking ring 70 abuts against the inner side of the handle 30, and the blocking ring 70 is connected on the mounting groove 3114 of the slide buckle 311 in a clamping manner. The blocking ring 70 prevents the slide buckle 311 from loosening due to external force or vibration, and further improves the service life of the self-locking mechanism 31.

[0039] The utility model discloses a kind of self-locking folding joints, when locking closure is carried out to upper joint 10 and lower joint 20, rotating handle 30, top rod 40 rotates along with handle 30, the arc recess of top rod 40 and the arc boss of top fastening piece 111 abut, so that rotation is blocked, when handle 30 is continuously rotated, top rod 40 overcomes the elastic force of compression spring 50, so that top rod 40 rotates relative to articulated shaft 60, when handle 30 is completely merged with upper joint 10, top rod 40 is completely vertical at this time and the arc boss of top fastening piece 111 generates force, top rod 40 stably top fastening top fastening piece 111, so that upper joint 10 and lower joint 20 are completely locked, the abutment portion 42 of top rod 40 and the clearance between handle 30 inner wall exist at this time, under the action of reset spring 312, the rod portion 3113 on the slide buckle 311 is pressed against the abutment portion 42 of top rod 40, avoid the abutment portion 42 of top rod 40 to the inner wall direction of handle 30 rotation, top rod 40 can be reliably locked, so that handle 30 has the effect of self-locking.

[0040] When upper joint 10 and lower joint 20 need to be opened, press the pressing portion 3111 on the slide buckle 311, so that the rod portion 3113 of slide buckle 311 and the abutment portion 42 of top rod 40 are separated, handle 30 is rotated outward at this time, the abutment portion 42 of top rod 40 can rotate to the inner wall direction of handle 30 through the elastic recovery of compression spring 50, top rod 40 is obliquely articulated in handle 30, so that the extrusion between top rod 40 and top fastening piece 111 is slowly released, handle 30 can be continuously rotated outward, so that top rod 40 is completely separated from top fastening piece 111, and upper joint 10 and lower joint 20 can be completely opened.

[0041] The utility model discloses the top fastening cooperation of top rod 40 and top fastening piece 111, and the self-locking mechanism of cooperation between slide buckle 311 and top rod 40, realize reliable locking and convenient unlocking function.

[0042] Finally, it should be explained that the above examples are only used to illustrate the technical solutions of the utility model, and not to limit the protection scope of the utility model, although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the essence and scope of the technical solutions of the utility model.

Claims

1. A self-locking folding joint comprising an upper joint, a lower joint, a handle and a top rod, one side of the upper joint being hingedly connected to one side of the lower joint, one end of the handle being hingedly connected to the other side of the lower joint, the top rod being rotatably hingedly connected to the handle, one end of the top rod abutting the upper joint, characterized in that, The handle is provided with a self-locking mechanism, the self-locking mechanism comprises a sliding buckle and a reset spring, the reset spring is arranged between the handle and the sliding buckle, when the reset spring drives the sliding buckle to reset, the sliding buckle abuts against one end of the top rod, when the sliding buckle moves and is separated from the top rod by overcoming the elastic force of the reset spring, the handle can be rotated to open. ​ 2. The self-locking folding joint of claim 1, wherein, Further comprising a compression spring, the top rod is provided with a mounting hole, one end of the compression spring is arranged in the mounting hole, the other end of the compression spring abuts against the inner side of the handle, the elastic force of the compression spring makes the top rod be obliquely hinged on the handle.

3. The self-locking folding joint of claim 1, wherein, One end of the top rod is provided with an abutting portion, the other end of the top rod is provided with a pressing portion, the sliding buckle is provided with a pressing portion, a limiting portion and a rod portion, when the reset spring drives the sliding buckle to reset, the abutting portion and the rod portion abut against each other.

4. The self-locking folding joint of claim 3, wherein, The handle is provided with a window, the sliding buckle is movably arranged on the window, the pressing portion extends out of the window and is arranged on the outer side of the handle, one side of the window is provided with a clamping portion, when the reset spring drives the sliding buckle to reset, the limiting portion is clamped in cooperation with the clamping portion.

5. The self-locking folding joint of claim 3, wherein, The abutting portion and the rod portion abut against each other at one end are provided with a circular arc surface.

6. The self-locking folding joint of claim 3, wherein, The sliding buckle is provided with a mounting groove, the mounting groove is clamped and connected with a retaining ring, one end of the retaining ring abuts against the inner side of the handle.

7. The self-locking folding joint of claim 3, wherein, The upper joint is provided with a protrusion, the protrusion is provided with a pressing piece, the pressing piece abuts against the pressing portion of the top rod.

8. The self-locking folding joint of claim 7, wherein, The pressing piece is provided with a circular arc protrusion, the pressing portion is provided with a circular arc groove matched with the circular arc protrusion.

9. The self-locking folding joint of claim 7, wherein, The pressing piece is provided with a circular arc groove, the pressing portion is provided with a circular arc protrusion matched with the circular arc groove.

10. The self-locking folding joint of claim 7, wherein, One side of the protrusion is screwed with a machine screw, one end of the machine screw abuts against the pressing piece.

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