Folding joint

Abstract

The application discloses a folding joint, which comprises a first joint, a second joint, a quick-release handle, a locking mechanism and a reset elastic piece. One side of the second joint and the quick-release handle are hingedly connected to one side of the first joint. A guide piece is arranged on the first folding joint. A guide hole is arranged on the guide piece. The locking mechanism passes through the guide hole of the guide piece. The reset elastic piece is sleeved on the locking mechanism. One end of the reset elastic piece abuts against the guide piece, and the other end of the reset elastic piece abuts against the locking mechanism. The locking mechanism is driven to lock the first joint and the second joint. The quick-release handle is used for driving the locking mechanism. The folding joint is safe and reliable.

Description

Technical Field

[0001] This invention relates to mechanical connection structures, and more specifically, to a folding joint for use in folding bicycles and folding electric vehicles. Background Technology

[0002] Folding bicycles are lightweight and compact when folded, making them easy to carry when going up and down elevators, taking buses, or riding the subway. They can be unfolded and used on the road, making travel convenient. They can also be placed in the trunk of a car, allowing you to experience the convenience of a car while enjoying the fun of cycling in nature during outings.

[0003] Folding joints are an important component of folding bicycles. Folding bicycles use folding joints to enable the bicycle to be folded or unfolded quickly, reducing the size of the bicycle and making it easier to store or transport.

[0004] Chinese patent document CN2619081Y discloses a folding joint with a four-bar linkage structure. Two connecting plates are hinged on one side, and each connecting plate has a recessed platform in the middle of the other side. The ends of the adjusting rod and the handle are respectively inserted into the recessed platform of one connecting plate. A hinge shaft passes through the adjusting rod or the handle and is inserted into the connecting plates on both sides of the recessed platform. By rotating the handle, the two connecting plates are tightened or loosened through the adjusting rod.

[0005] Chinese patent document CN1406808A discloses an internally locking folding joint, which has two connecting plates that are respectively connected to a rod and are hinged on one side. Each of the mating surfaces of the two connecting plates has a recess, and at least one corresponding edge of the recess of the two connecting plates has a slot. A movable clamping block with one side being V-shaped is placed in the recess of one of the connecting plates. When the two connecting plates are closed, the two flanges of the V-shape on one side of the clamping block can be simultaneously inserted into the slots on the edges of the recesses. The clamping block is driven to move by a toggle mechanism so that the flanges of the clamping block are inserted into or removed from the slots. The handle of the toggle mechanism is outside one side of the connecting plate.

[0006] Existing folding joints generally include top rod type folding joints, four-bar linkage folding joints, internal locking type folding joints, and external locking type folding joints. For example, Chinese patent document CN2619081Y discloses a four-bar linkage structure folding joint and CN1406808A discloses an internal locking type folding joint. If the user accidentally rotates the handle from the locked position to a certain angle, the folding joint will loosen, posing a safety hazard and failing to meet the safety standards of some countries or regions. Summary of the Invention

[0007] The purpose of this invention is to provide a folding connector that is highly safe and reliable.

[0008] The technical solution adopted by the folding joint disclosed in this invention is:

[0009] A folding connector includes a first connector, a second connector, a quick-release handle, a locking mechanism, and a reset elastic element. One side of the second connector, one side of the first connector, and the quick-release handle are hinged together. The first folding connector is provided with a guide element and a guide hole. The locking mechanism passes through the guide hole of the guide element. The reset elastic element is sleeved on the locking mechanism, with one end abutting against the guide element and the other end abutting against the locking mechanism. The locking mechanism is driven to lock the first connector and the second connector. The quick-release handle is used to drive the locking mechanism.

[0010] As a preferred embodiment, the locking mechanism is a ball-head rod, one end of which is hinged to the quick-release handle, and the other end is provided with a ball head. The reset elastic element is sleeved on the ball-head rod, and the other end of the reset elastic element abuts against the ball head. The other side of the second connector has a locking part on its inner edge, and the locking part has a ball head recess. When the ball head on the ball-head rod abuts against the ball head recess, the first connector and the second connector are locked.

[0011] As a preferred embodiment, the ball head rod includes a connecting rod and a ball head rod. One end of the connecting rod is provided with a round hole, and the other end is threadedly connected to one end of the ball head rod. The ball head is located at the other end of the ball head rod.

[0012] As a preferred embodiment, the locking mechanism includes a locking block and a connecting rod. One end of the connecting rod is hinged to the quick-release handle, and the other end is fixedly connected to the locking block. The reset elastic element is sleeved on the connecting rod, and the reset elastic element drives the locking block to engage with the second connector.

[0013] As a preferred embodiment, the outer edge of the other side of the second connector is provided with a second slot, the locking block is provided with a second protrusion, the second slot and the second protrusion cooperate, the locking block is located on the outside of the first connector and the second connector, and the other end of the reset elastic member abuts against the end of the connecting rod that is hinged to the quick release handle.

[0014] As a preferred embodiment, the outer edge of the other side of the first connector is provided with a first slot, and the locking block is also provided with a first protrusion, which cooperates with the first slot.

[0015] As a preferred embodiment, a fourth slot is provided on the inner edge of the other side of the second connector, and a second protrusion is provided on the locking block. The fourth slot cooperates with the second protrusion, the locking block is located between the first connector and the second connector, and the other end of the reset elastic member abuts against the locking block.

[0016] As a preferred embodiment, a third slot is provided on the inner edge of the other side of the first connector, and a first protrusion is provided on the locking block, the first protrusion cooperating with the third slot.

[0017] As a preferred embodiment, the outer side of the second protrusion of the locking block is an arc surface.

[0018] As a preferred embodiment, the quick-release handle is equipped with a self-locking mechanism.

[0019] As a preferred embodiment, the connecting rod includes a connecting rod and an adjusting rod. One end of the adjusting rod is threadedly connected to the connecting rod, and the other end is threadedly connected to the locking block. One end of the connecting rod is provided with a round hole.

[0020] As a preferred embodiment, one end of the quick-release handle is provided with a cam, the cam engages with a round hole, the cam is provided with an eccentric hinge hole, and the cam is connected to the first connector through a hinge shaft passing through the eccentric hinge hole.

[0021] As a preferred embodiment, the device also includes a disc. One end of the quick-release handle is provided with a cam. The cam has a slot, an eccentric hinge hole, and a positioning hole. The eccentric hinge hole and the positioning hole pass through the slot. The disc has an eccentric hole and a pin hole. The disc is located in the slot of the cam and placed in the circular hole of the connecting rod. One end of the cam and the connecting rod are connected to the first connector through a hinge shaft passing through the eccentric hinge hole on the cam and the eccentric hole on the disc, and a positioning pin passing through the positioning hole on the cam and the pin hole on the disc.

[0022] The beneficial effects of the folding connector disclosed in this invention are: after the first connector and the second connector are closed, the locking mechanism locks the first connector and the second connector under the action of the elastic force of the reset elastic element, thereby achieving the effect of automatic locking of the first connector and the second connector. Even if the quick-release handle is accidentally loosened, the first connector and the second connector can still be locked under the action of the reset elastic element, which is safe and reliable. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the folding joint according to Embodiment 1 of the present invention;

[0024] Figure 2 This is a schematic diagram of the folding connector according to Embodiment 1 of the present invention;

[0025] Figure 3 This is an exploded view of the folded joint according to Embodiment 1 of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the folded joint in Embodiment 2 of the present invention;

[0027] Figure 5 This is an exploded view of the folded joint according to Embodiment 2 of the present invention;

[0028] Figure 6 This is a schematic diagram of the folding connector according to Embodiment 3 of the present invention;

[0029] Figure 7 This is an exploded view of the folded joint according to Embodiment 3 of the present invention. Detailed Implementation

[0030] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0031] Example 1

[0032] Please refer to Figures 1 to 3 A folding connector includes a first connector 10, a second connector 20, a locking mechanism 30, a quick-release handle 40, a reset elastic element 50, and a self-locking mechanism.

[0033] The first connector 10 has a first hinge ear 11 on one side, and a first hinge hole 12 on the first hinge ear 11. The other side of the first connector 10 has a first slot 13 on its outer edge. The first connector 10 has a guide member 14 on its end face, and the guide member 14 has a guide hole.

[0034] The second connector 20 has a second hinge ear 21 on one side, and a second hinge hole 22 on the second hinge ear 21. The other side of the second connector 20 has a second slot, which is not shown in the figure.

[0035] The locking mechanism 30 includes a locking block 33, a connecting rod 32, and an adjusting rod 31. One end of the connecting rod 32 is a large end with a round hole 321 and a protrusion 322 on its outer edge. The other end has a threaded connection hole (not shown in the figure). The locking block 33 has a threaded hole 333, and a first protrusion 331 and a second protrusion 332 are provided on both sides of the threaded hole 333. The outer side of the second protrusion 332 is an arc surface. (Please refer to...) Figure 3 The first protrusion 331 engages with the first slot 13 on the first connector 10, and the second protrusion 332 engages with the second slot on the second connector 20. One end of the adjusting rod 31 is threadedly connected to the threaded connection hole on the connecting rod 32, and the other end is threadedly connected to the threaded hole 333 on the locking block 33. The locking block 30 is located on the outside of the first connector 10 and the second connector 20.

[0036] A disc 75 is provided in the round hole 321 at the large end of the connecting rod 32, and the disc 75 is provided with an eccentric hole 751 and a pin hole 752.

[0037] One end of the quick-release handle 40 is provided with a cam, on which a slot 43, an eccentric hinge hole 41 and a positioning hole 42 are provided. The eccentric hinge hole 41 and the positioning hole 42 pass through the slot 43. The other end of the quick-release handle 40 is a handle. The middle part of the quick-release handle 40 is provided with a countersunk groove 44 and a limiting threaded hole 45. The countersunk groove 44 passes through the slot 43 and the limiting threaded hole 45 passes through the countersunk groove 44. The disc 75 is disposed in the slot 43 of the cam. The first connector 10 and the second connector 20 are hinged together by a hinge shaft 71 passing through the first hinge hole 12 on the first connector 10, the second hinge hole 22 on the second connector 20, the eccentric hinge hole 41 on the quick-release handle 40, and the eccentric hole 751 on the disc 75. The hinge shaft 71 has screw holes at both ends, and screws 74 are provided in the screw holes. A washer 73 is provided between the screws 74 and the hinge shaft 71 to prevent the hinge shaft 71 from coming out of the first hinge hole 12 and the second hinge hole 22. The disc 75 rotates synchronously with the cam of the quick-release handle 40 by a pin 72 passing through the positioning hole 42 on the cam and the pin hole 752 on the disc 75.

[0038] The self-locking mechanism includes a self-locking bolt 61, a limiting screw 63, and a return elastic element 62. The self-locking bolt 61 is provided with a narrow limiting groove and is located in a recess 44. The limiting screw 63 is located in a limiting threaded hole 45 to prevent the self-locking bolt 61 from coming out of the recess 44. One end of the return elastic element 62 abuts against the limiting screw 63, and the other end abuts against the edge of the limiting groove of the self-locking bolt 61, so that the self-locking bolt 61 tends to extend out of the recess 44.

[0039] After the first connector 10 and the second connector 20 are closed, the connecting rod 32 and the adjusting rod 31 drive the locking block 33 to move under the action of the elastic force of the reset elastic element 50. The first protrusion 331 and the second protrusion 332 of the locking block 33 respectively engage with the first slot 13 on the first connector 10 and the second slot on the second connector 20 to lock the first connector 10 and the second connector 20, thus achieving the effect of automatic locking of the first connector 10 and the second connector 20. Even if the quick release handle 40 is loosened, under the action of the reset elastic element 50, the locking block 33 is locked with the first connector 10. When the second connector 20 is closed, since the outer side of the second protrusion 332 is arc-shaped, the second connector 20 overcomes the elastic force of the reset elastic element 50 and pushes the locking block 33 outward. After the locking block 33 avoids the second connector 20, under the action of the reset elastic element 50, the second protrusion 332 engages with the second slot of the second connector 20, thus locking the first connector 10 and the second connector 20. Rotating the quick-release handle 40 causes the disc 75 to rotate synchronously. Since the quick-release handle 40 rotates around the hinge shaft 71 passing through the eccentric hinge hole 41 on the cam, it drives the connecting rod 32 and the adjusting rod 31 to move, thus enabling the locking block 33 to engage or disengage with the first connector 10 and the second connector 20. This locks or releases the first connector 10 and the second connector 20. When the quick-release handle 40 passes its dead center, locking the first connector 10 and the second connector 20, it ensures the locking mechanism is secure. The self-locking bolt 61 returns to the return elastic element 62. Under the action, it moves in the direction of disengaging from the sink 44. The outer edge of the self-locking bolt 61 is hooked onto the protrusion 322 on the connecting rod 32, which restricts the rotation of the quick release handle 40 and achieves the self-locking effect. Pressing down on the self-locking bolt 61 causes the outer edge of the self-locking bolt 61 to disengage from the protrusion 322 on the connecting rod 32. Rotating the quick release handle 40 causes the locking block 33 to disengage from the first slot 13 on the first connector 10 and the second slot on the second connector 20, thereby opening the first connector 10 and the second connector 20, which improves the reliability and safety of the folding connector.

[0040] In the above embodiments, even if the first connector 10 is not provided with the first slot, since the connecting rod 32 and the adjusting rod 31 are sleeved in the guide hole of the guide member 14, when the locking block 33 is locked with the second connector 20, the guide member 14 restricts the rotation of the connecting rod 32, the adjusting rod 31 and the locking block 33, so that the first connector 10 and the second connector 20 can still be locked.

[0041] Example 2

[0042] Please refer to Figure 4 and Figure 5 A folding connector includes a first connector 10, a second connector 20, a locking mechanism, a quick-release handle 40, a reset elastic element 50, and a self-locking mechanism.

[0043] The first connector 10 has a first hinge ear 11 on one side, and a first hinge hole 12 on the first hinge ear 11. The first connector 10 has a through hole 15 on the other side. The first connector 10 has a guide member 14 on its end face, and the guide member 14 has a guide hole.

[0044] The second connector 20 has a second hinge ear 21 on one side, and a second hinge hole 22 on the second hinge ear 21. The other side of the second connector 20 has an outwardly extending locking part 23 on the inner edge, and a ball head recess 24 on the locking part 23.

[0045] The locking mechanism is a ball-head push rod, which includes a connecting rod 32 and a ball-head rod 34. One end of the connecting rod 32 is a large end with a round hole 321 and a protrusion 322 on its outer edge. The other end has a threaded connection hole. One end of the ball-head rod 34 has an external thread, and the other end has a ball head. The ball head mates with the ball head recess 24 on the second connector 20. One end of the ball-head rod 34 is threaded to the threaded connection hole on the connecting rod 32 through the external thread. Since the other side of the first connector 10 has a through hole 15, it is convenient for the ball-head push rod to pass through the guide hole of the guide member 14.

[0046] One end of the quick-release handle 40 is provided with a cam, and the cam is provided with an eccentric hinge hole 41. The other end of the quick-release handle 40 is a handle. The middle part of the quick-release handle 40 is provided with a countersunk groove 44 and a limiting threaded hole 45. The countersunk groove 44 passes through the slot 43, and the limiting threaded hole 45 passes through the countersunk groove 44. The first connector 10 and the second connector 20 are hinged together by a hinge shaft 71 passing through the first hinge hole 12 on the first connector 10, the second hinge hole 22 on the second connector 20, and the eccentric hinge hole 41 on the quick-release handle 40. The hinge shaft 71 is provided with screw holes at both ends, and screws 74 are provided in the screw holes. A washer 73 is provided between the screws 74 and the hinge shaft 71 to prevent the hinge shaft 71 from coming out of the first hinge hole 12 and the second hinge hole 22.

[0047] The self-locking mechanism includes a self-locking bolt 61, a limiting screw 63, and a return elastic element 62. The self-locking bolt 61 is provided with a narrow limiting groove and is located in a recess 44. The limiting screw 63 is located in a limiting threaded hole 45 to prevent the self-locking bolt 61 from coming out of the recess 44. One end of the return elastic element 62 abuts against the limiting screw 63, and the other end abuts against the edge of the limiting groove of the self-locking bolt 61, so that the self-locking bolt 61 tends to extend out of the recess 44.

[0048] After the first connector 10 and the second connector 20 are closed, the connecting rod 32 and the ball head rod 34 move under the action of the elastic force of the reset elastic member 50. Since the locking part 23 is located on the inner edge of the other side of the second connector 20 and extends outward, the ball head on the ball head rod 34 is inserted into the ball head recess 24 on the second connector 20. Due to the rotation restriction of the connecting rod 32 and the ball head rod 34 by the guide member 14, the first connector 10 and the second connector 20 are locked, realizing the effect of automatic locking of the first connector 10 and the second connector 20. Even if the quick release handle 40 is loosened, under the action of the reset elastic member 50, the connecting rod 32 and the ball head rod 34 extend outward, and the second connector 20 closes to the first connector 10. Since the ball head of the ball head rod 34 is a smooth arc surface, the locking part 23 pushes the ball head to drive the ball head rod 34 to overcome the elastic force of the reset elastic member 50. When the ball head on the ball head rod 34 slides into the ball head recess 24 on the second connector 20, the first connector 10 and the second connector 20 are locked. Rotating the quick-release handle 40 causes the connecting rod 32 and the ball joint 34 to move around the hinge shaft 71 passing through the eccentric hinge hole 41 on the cam, thus enabling the ball joint 34 to be inserted into or disengaged from the first connector 10 and the second connector 20. This locks or releases the first connector 10 and the second connector 20. When the quick-release handle 40 passes its dead point, locking the first connector 10 and the second connector 20, it ensures the locking function. Under the action of the return elastic element 62, the self-locking bolt 61 moves in the direction of disengaging from the recess 44. The outer edge of the self-locking bolt 61 is attached to the protrusion 322 on the connecting rod 32, restricting the rotation of the quick-release handle 40 and achieving a self-locking effect. Pressing down on the self-locking bolt 61 causes its outer edge to disengage from the protrusion 322 on the connecting rod 32. Rotating the quick-release handle 40 causes the ball joint 34 to disengage from the first connector 10 and the second connector 20, thereby opening the first connector 10 and the second connector 20, improving the reliability and safety of the folding joint.

[0049] Example 3

[0050] Please refer to Figure 6 and Figure 7 A folding connector includes a first connector 10, a second connector 20, a locking mechanism, a quick-release handle 40, a reset elastic element 50, and a self-locking mechanism.

[0051] The first connector 10 has a first hinge ear 11 on one side, and a first hinge hole 12 on the first hinge ear 11. The first connector 10 has a third slot 16 on the inner edge of the other side. The first connector 10 has a guide member 14 on the end face, and the guide member 14 has a guide hole.

[0052] The second connector 20 has a second hinge ear 21 on one side, and a second hinge hole 22 on the second hinge ear 21. The second connector 20 has a fourth slot on the inner edge of the other side, which is not shown in the figure.

[0053] The locking mechanism 30 includes a locking block 33, a connecting rod 32, and an adjusting rod 31. One end of the connecting rod 32 is a large end with a round hole 321 and a protrusion 322 on its outer edge. The other end has a threaded connection hole (not shown in the figure). The locking block 33 has a threaded hole 333 with a first protrusion 331 and a second protrusion 332 on both sides. The first protrusion 331 engages with a third groove 16 on the first connector 10, and the second protrusion 332 engages with a fourth groove on the second connector 20. The outer side of the second protrusion 332 is a smooth arc surface, which facilitates the movement of the locking block 33 when the second connector 20 rotates towards the first connector 10. One end of the adjusting rod 31 is threaded to the threaded connection hole on the connecting rod 32, and the other end is threaded to the threaded hole 333 on the locking block 33. The locking block 30 is located between the first connector 10 and the second connector 20.

[0054] A disc 75 is provided in the round hole 321 at the large end of the connecting rod 32, and the disc 75 is provided with an eccentric hole 751 and a pin hole 752.

[0055] One end of the quick-release handle 40 is provided with a cam, on which a slot 43, an eccentric hinge hole 41 and a positioning hole 42 are provided. The eccentric hinge hole 41 and the positioning hole 42 pass through the slot 43. The other end of the quick-release handle 40 is a handle. The middle part of the quick-release handle 40 is provided with a countersunk groove 44 and a limiting threaded hole 45. The countersunk groove 44 passes through the slot 43 and the limiting threaded hole 45 passes through the countersunk groove 44. The disc 75 is disposed in the slot 43 of the cam. The first connector 10 and the second connector 20 are hinged together by a hinge shaft 71 passing through the first hinge hole 12 on the first connector 10, the second hinge hole 22 on the second connector 20, the eccentric hinge hole 41 on the quick-release handle 40, and the eccentric hole 751 on the disc 75. The hinge shaft 71 has screw holes at both ends, and screws 74 are provided in the screw holes. A washer 73 is provided between the screws 74 and the hinge shaft 71 to prevent the hinge shaft 71 from coming out of the first hinge hole 12 and the second hinge hole 22. The disc 75 rotates synchronously with the cam of the quick-release handle 40 by a pin 72 passing through the positioning hole 42 on the cam and the pin hole 752 on the disc 75.

[0056] The self-locking mechanism includes a self-locking bolt 61, a limiting screw 63, and a return elastic element 62. The self-locking bolt 61 is provided with a narrow limiting groove and is located in a recess 44. The limiting screw 63 is located in a limiting threaded hole 45 to prevent the self-locking bolt 61 from coming out of the recess 44. One end of the return elastic element 62 abuts against the limiting screw 63, and the other end abuts against the edge of the limiting groove of the self-locking bolt 61, so that the self-locking bolt 61 tends to extend out of the recess 44.

[0057] After the first connector 10 and the second connector 20 are closed, the connecting rod 32 and the adjusting rod 31 drive the locking block 33 to move under the action of the elastic force of the reset elastic element 50. The first protrusion 331 and the second protrusion 332 of the locking block 33 respectively engage with the third slot 16 on the first connector 10 and the fourth slot on the second connector 20 to lock the first connector 10 and the second connector 20, thereby achieving the effect of automatic locking of the first connector 10 and the second connector 20. Even if the quick release handle 40 is loosened, the first connector 10 and the second connector 20 can still be locked under the action of the reset elastic element 50. Rotating the quick-release handle 40 causes the disc to rotate synchronously. Since the quick-release handle 40 rotates around the hinge axis passing through the eccentric hinge hole 41 on the cam, it moves the connecting rod 32 and the adjusting rod 31, enabling the locking block 33 to engage or disengage with the first connector 10 and the second connector 20, thus locking or releasing the first connector 10 and the second connector 20. When the quick-release handle 40 passes its dead center, locking the first connector 10 and the second connector 20 ensures proper locking. The self-locking bolt 61, in the action of the return elastic element 62… Move the self-locking bolt 61 downwards in the direction of disengaging from the sink 44. The outer edge of the self-locking bolt 61 is hooked onto the protrusion 322 on the connecting rod 32, which restricts the rotation of the quick-release handle 40 and achieves a self-locking effect. Press down on the self-locking bolt 61 to disengage the outer edge of the self-locking bolt 61 from the protrusion 322 on the connecting rod 32. Rotate the quick-release handle 40 to drive the locking block 33 to disengage from the third slot 16 on the first connector 10 and the fourth slot on the second connector 20, thereby opening the first connector 10 and the second connector 20, which improves the reliability and safety of the folding connector.

[0058] In the above embodiments, even if the first connector 10 is not provided with a third slot, since the connecting rod 32 and the adjusting rod 31 are sleeved in the guide hole of the guide member 14, when the locking block 33 is locked with the second connector 20, the first connector 10 and the second connector 20 can still be locked due to the rotation restriction of the connecting rod 32, the adjusting rod 31 and the locking block 33 by the guide member 14.

[0059] In the above embodiments, the first and second connectors are automatically locked by the reset elastic element, which improves the safety of the folding connector. The quick-release handle is locked by locking the quick-release handle and the self-locking mechanism, which further protects the folding connector. It should be noted that there are many structures of self-locking mechanism, such as the snap self-locking structure disclosed in Chinese patent document CN206307207U. As long as it can be used in conjunction with other structures, it can replace the self-locking mechanism in the above embodiments.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A folding connector, comprising a first connector, a second connector, a quick-release handle, and a locking mechanism, wherein one side of the second connector, one side of the first connector, and the quick-release handle are hingedly connected, characterized in that, It also includes a reset elastic element. The first connector is provided with a guide element, which has a guide hole. The locking mechanism passes through the guide hole of the guide element. The reset elastic element is sleeved on the locking mechanism, with one end abutting against the guide element and the other end abutting against the locking mechanism. The locking mechanism is driven to lock the first connector and the second connector. The quick-release handle is used to drive the locking mechanism. The locking mechanism is a ball-head rod. One end of the ball-head rod is hinged to the quick-release handle, and the other end has a ball head. The reset elastic element is sleeved on the ball-head rod, with the other end abutting against the ball head. The other side of the second connector has a locking part on its inner edge, with a ball head recess on the locking part. When the ball head on the ball-head rod abuts against the ball head recess, the first connector and the second connector are locked.

2. The folding joint as described in claim 1, characterized in that, The ball head rod includes a connecting rod and a ball head rod. One end of the connecting rod has a round hole, and the other end is threaded to one end of the ball head rod. The ball head is located at the other end of the ball head rod.

3. The folding joint as described in claim 2, characterized in that, The quick-release handle has a cam at one end, which engages with a round hole. The cam has an eccentric hinge hole, and the cam is connected to the first connector via a hinge shaft passing through the eccentric hinge hole.

4. The folding joint as described in claim 2, characterized in that, It also includes a disc, one end of the quick-release handle is provided with a cam, the cam is provided with a slot, an eccentric hinge hole and a positioning hole, the eccentric hinge hole and the positioning hole pass through the slot, the disc is provided with an eccentric hole and a pin hole, the disc is located in the slot of the cam and placed in the circular hole of the connecting rod, one end of the cam and the connecting rod are connected to the first connector through a hinge shaft passing through the eccentric hinge hole on the cam and the eccentric hole on the disc and a positioning pin passing through the positioning hole on the cam and the pin hole on the disc.

5. A folding connector, comprising a first connector, a second connector, a quick-release handle, and a locking mechanism, wherein one side of the second connector, one side of the first connector, and the quick-release handle are hingedly connected, characterized in that, It also includes a reset elastic element. The first connector is provided with a guide element, and the guide element is provided with a guide hole. The locking mechanism passes through the guide hole of the guide element. The reset elastic element is sleeved on the locking mechanism, with one end abutting against the guide element and the other end abutting against the locking mechanism. The locking mechanism is driven to lock the first connector and the second connector. The quick-release handle is used to drive the locking mechanism. The locking mechanism includes a locking block and a connecting rod. One end of the connecting rod is hinged to the quick-release handle, and the other end is fixedly connected to the locking block. The reset elastic element is sleeved on the connecting rod. The reset elastic element drives the locking block to engage with the second connector.

6. The folding joint as described in claim 5, characterized in that, The outer edge of the second connector on the other side is provided with a second slot, and the locking block is provided with a second protrusion. The second slot and the second protrusion cooperate. The locking block is located on the outside of the first connector and the second connector. The other end of the reset elastic member abuts against the end of the connecting rod that is hinged to the quick release handle.

7. The folding joint as described in claim 6, characterized in that, The outer edge of the other side of the first connector is provided with a first slot, and the locking block is also provided with a first protrusion, which cooperates with the first slot.

8. The folding joint as described in claim 5, characterized in that, The second connector has a fourth slot on the inner edge of the other side, and the locking block has a second protrusion. The fourth slot and the second protrusion cooperate with each other. The locking block is located between the first connector and the second connector, and the other end of the reset elastic member abuts against the locking block.

9. The folding joint as described in claim 8, characterized in that, A third slot is provided on the inner edge of the other side of the first connector, and a first protrusion is provided on the locking block, which cooperates with the third slot.

10. The folding joint as described in any one of claims 5-9, characterized in that, The outer side of the second protrusion of the locking block is an arc surface.

11. The folding joint as described in claim 5, characterized in that, The connecting rod includes a connecting rod and an adjusting rod. One end of the adjusting rod is threaded to the connecting rod, and the other end is threaded to the locking block. One end of the connecting rod is provided with a round hole.

12. The folding joint as described in claim 11, characterized in that, The quick-release handle has a cam at one end, which engages with a round hole. The cam has an eccentric hinge hole, and the cam is connected to the first connector via a hinge shaft passing through the eccentric hinge hole.

13. The folding joint as described in claim 11, characterized in that, It also includes a disc, one end of the quick-release handle is provided with a cam, the cam is provided with a slot, an eccentric hinge hole and a positioning hole, the eccentric hinge hole and the positioning hole pass through the slot, the disc is provided with an eccentric hole and a pin hole, the disc is located in the slot of the cam and placed in the circular hole of the connecting rod, one end of the cam and the connecting rod are connected to the first connector through a hinge shaft passing through the eccentric hinge hole on the cam and the eccentric hole on the disc and a positioning pin passing through the positioning hole on the cam and the pin hole on the disc.

14. The folding joint as described in any one of claims 1-2 or 5-9, characterized in that, The quick-release handle is equipped with a self-locking mechanism.

Images