Folding handlebar

Abstract

The utility model relates to a folding handlebar which comprises a base, two handles and two cam locking handles, two elastic clamping pieces are arranged at one end of each handle, a U-shaped groove is formed between the two elastic clamping pieces, connecting blocks are arranged at the two ends of the base, and the two connecting blocks penetrate into the U-shaped grooves of the two handles respectively. The connecting blocks are provided with rotating shafts penetrating through the connecting blocks, the two elastic clamping pieces on the handles are rotationally connected with the rotating shafts, the two elastic clamping pieces of each handle are provided with first clamping grooves penetrating through the corresponding handle, and each connecting block is provided with second clamping grooves penetrating through the corresponding connecting block. The two cam locking handles penetrate into the second clamping grooves of the two connecting blocks respectively, the two ends of each cam locking handle penetrate into the first clamping grooves of the two elastic clamping pieces respectively and are connected with the elastic clamping pieces, and the relative movement of the connecting blocks and the elastic clamping pieces is limited through the cam locking handles to achieve folding or stretching locking of the handle. And when the handle is locked, safety and reliability are achieved in the riding process of a user.

Description

Technical Field

[0001] The present application relates to the technical field of handlebars, and more particularly, to a foldable handlebar. Background Art

[0002] Bicycles, scooters, electric bikes, and other forms of transportation and leisure are closely connected to people's lives. To facilitate portability and storage, their structures generally employ folding designs, such as folding frames and handlebars. In related technologies, folding handlebars are typically hinged directly to a base, with friction at the joint maintaining the handle's current position. Manually pushing and pulling the handle causes it to swing about the joint to fold and unfold the handle. However, over time, mechanical wear and tear inevitably occur at the joint between the handlebar and the base, gradually loosening the joint and causing the handlebar to wobble, directly impacting the safety and reliability of the folding e-bike. Utility Model Content

[0003] In order to solve the problem in the related art that the folding handle is usually directly hinged to the base and the current position of the handle is maintained by the friction at the hinge, which is not safe and reliable, the present application provides a folding handle.

[0004] A folding handlebar comprises a base and two handles, each of the handles being provided with two elastic clips at one end, a U-shaped groove being formed between the two elastic clips, a connecting block being provided at both ends of the base, the two connecting blocks being respectively inserted into the U-shaped grooves of the two handles, a rotating shaft being provided on the connecting block, and the two elastic clips on the handles being rotatably connected to the rotating shaft;

[0005] It also includes two cam locking handles, and the two elastic clips of each handle are provided with a first slot running through the two elastic clips, and each connecting block is provided with a second slot running through the two cam locking handles respectively penetrate into the second slots of the two connecting blocks, and the two ends of the cam locking handle respectively penetrate into the first slots of the two elastic clips and are connected to the elastic clips. The cam locking handles are used to bend the two elastic clips toward each other to clamp the connecting block or to release the clamping of the connecting block.

[0006] Preferably, each of the connecting blocks is provided with a first avoidance groove running through it, the first avoidance groove is located on one side of the second card slot and is connected to the second card slot, and the first slot on each of the elastic clips is provided with two connected first displacement areas, one first displacement area is aligned with the second card slot, and the other first displacement area is aligned with the first avoidance groove, and the cam locking handle is moved back and forth in the two first displacement areas of the first slot to move the cam locking handle from the second card slot to the first avoidance groove or to move the cam locking handle from the first avoidance groove to the second card slot, and the first avoidance groove is used to avoid the cam locking handle when the handle rotates around the rotating shaft.

[0007] Preferably, the two elastic clips of each handle are provided with a second avoidance groove running through the handle, the second avoidance groove is on one side of the first slot and is connected to the first slot, and the second slot on each connecting block is provided with two connected second displacement areas, one second displacement area is aligned with the first slot, and the other second displacement area is aligned with the second avoidance groove, and the cam locking handle is moved back and forth in the two second displacement areas of the second slot to move the cam locking mechanism from the second avoidance groove to the first slot or from the first slot to the second avoidance groove, and the second avoidance groove is used to avoid the cam locking handle when the handle rotates around the rotating shaft.

[0008] Preferably, there are multiple second card slots provided on each of the connecting blocks, and the multiple second card slots are all connected to the first avoidance slot, and the multiple second card slots are arranged at intervals around the axis of the rotating shaft.

[0009] Preferably, there are multiple first card slots provided on each of the elastic clips, and the multiple first card slots are all connected to the second avoidance slots, and the multiple first card slots are arranged at intervals around the axis of the rotating shaft.

[0010] Preferably, the connecting block is provided with grooves on both sides of the two elastic clips, and plane bearings are installed in the two grooves. The two plane bearings are in contact with the two elastic clips respectively, and the rotating shaft passes through the center holes of the two plane bearings.

[0011] Preferably, the cam locking handle includes an active clamping shaft, a movable pressure block, a fixed pressure block, a support shaft, a cam, and a grip, the active clamping shaft passes through the second clamping groove of the connecting block and the two ends of the active clamping shaft respectively pass through the first clamping grooves of the two elastic clips, one end of the active clamping shaft is threadedly connected to the fixed pressure block, the fixed pressure block abuts against one of the elastic clips on the handle, the active pressure block is provided with an opening and is inserted into the active clamping shaft from one end of the active clamping shaft away from the fixed pressure block through the opening, and the active pressure block abuts against the other elastic clip on the handle, the support shaft is fixedly connected to the end of the active clamping shaft close to the movable pressure block, the support shaft is rotatably connected to the cam to support the rotation of the cam, the circumferential side wall of the cam abuts against the side of the active pressure block away from the elastic clip, and the grip is fixedly connected to the circumferential side wall of the cam.

[0012] The beneficial technical effects of this application are:

[0013] 1. The elastic clip is rotatably connected to the rotating shaft, and the handle is supported by the rotating shaft, so that the handle is pushed to rotate toward the base to fold the handle. The cam locking handle is inserted into the second slot of the connecting block and the first slots of the two elastic clips to realize the relative movement of the limiting connecting block and the elastic clips, and the cam locking handle is used to bend the two elastic clips toward each other to clamp the connecting block, further limiting the relative movement of the connecting block and the elastic clips, so that the handle is not easy to shake when the vehicle is driving, thereby reducing the safety risk during vehicle driving.

[0014] 2. By arranging a first avoidance groove on the connecting block to avoid the cam locking handle and arranging two first shifting areas on the first slot to realize the reciprocating movement of the cam locking handle so that the cam locking handle moves from the second slot to the first avoidance groove or the cam locking handle moves from the first avoidance groove to the second slot, it is possible to realize the cam locking handle passing through the first slot and the second slot without disassembling the cam locking handle, thereby realizing the handle being rotated toward the base and folded, which is more convenient and practical. The number of second slots on the connecting block is multiple, so that the cam locking handle can be snapped into multiple positions, which is conducive to fixing the handle to the base at multiple angles, meeting the needs of different gripping postures of the rider; the second avoidance groove and the second slot are arranged on the elastic clip, which have the same effect as the first avoidance groove and the first slot are arranged on the connecting block. The number of first slots arranged on the elastic clip is multiple and the number of second slots arranged on the connecting block is multiple, which has the same effect as the number of second slots arranged on the connecting block.

[0015] 3. By setting a flat bearing to contact the elastic clip, the auxiliary handle can be rotated, reducing the friction between the elastic clip and the connecting block when the handle is rotated, making the handle rotate smoother and helping to reduce mechanical wear and increase the service life of the handle and base. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a folding handlebar in Example 1.

[0017] Figure 2 This is an exploded view of a folding handlebar of Example 1.

[0018] Figure 3 2 is a schematic diagram of the overall structure of a folding handlebar according to embodiment 2.

[0019] Figure 4 This is an exploded view of a folding handlebar of Example 2.

[0020] Figure numerals: 1. base; 11. connecting block; 111. rotating shaft; 112. second slot; 113. first avoidance groove; 114. groove; 115. plane bearing; 2. handle; 21. elastic clip; 211. first slot; 212. second avoidance groove; 22. U-shaped groove; 3. cam locking handle; 31. movable slot; 32. movable pressure block; 321. arc surface; 33. fixed pressure block; 34. support shaft; 35. cam; 36. grip. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0022] Example 1

[0023] Reference Figure 1 and Figure 2 A folding handlebar comprises a base 1 and two handles 2, each of which is provided with two elastic clips 21 at one end of each handle 2, and a U-shaped groove 22 is formed between the two elastic clips 21. The base 1 is in the shape of a transverse tube, and connecting blocks 11 are provided at both ends of the transverse tube-shaped base 1. The two connecting blocks 11 are respectively inserted into the U-shaped grooves 22 of the two handles 2, and the opposite sides of the connecting blocks 11 are respectively close to the inner sides of the two elastic clips 21. Each connecting block 11 is provided with a rotating shaft 111 passing through it. The two elastic clips 21 on the handle 2 are rotatably connected to the rotating shaft 111, so that the handle 2 is supported by the rotating shaft 111. The handle 2 can rotate around the rotating shaft 111, and the handle 2 can be folded toward the base 1 by rotating the handle 2 around the rotating shaft 111.

[0024] Reference Figure 1 and Figure 2A folding handlebar also includes two cam locking handles 3, which are respectively installed on the two handles 2 and connected to the two elastic clips 21 provided on the handles 2. The two elastic clips 21 of each handle 2 are provided with a first card slot 211 that passes through itself, and each connecting block 11 is provided with a second card slot 112 that passes through itself. The cam locking handle 3 includes a movable card shaft 31, a movable pressure block 32, a fixed pressure block 33, a support shaft 34, a cam 35, and a grip 36. The movable card shaft 31 passes through the second card slot 112 of the connecting block 11, and the two ends of the movable card shaft 31 pass through the first card slot 211 of the two elastic clips 21 respectively. The cam 35 is provided with a through hole which penetrates the cam 35 itself, and the support shaft 34 is inserted into the through hole to realize the rotation connection between the cam 35 and the support shaft 34. A slot is provided in the middle of the peripheral side wall of the cam 35, and the support shaft 34 is connected and fixed to the end of the movable card shaft 31 close to the movable pressure block 32 by avoiding the slot, and the support shaft 34 supports the cam When the cam 35 rotates, the side of the movable pressure block 32 away from the elastic sheet is an arcuate surface 321, and the shaft side wall of the cam 35 abuts against the arcuate surface 321 of the movable pressure block 32, and the relative movement of the limiting connection block 11 and the elastic clip 21 is realized by inserting the cam locking handle 3 into the second slot 112 of the connecting block 11 and the first slot 211 of the two elastic clips 21. When the cam 35 rotates, when the convex part of the side wall of the cam 35 rotates to the movable pressure block 32, the cam 35 presses the movable pressure block 32 in the direction of the elastic clip 21 and pulls the movable card shaft 31 to move and drive the fixed pressure block 33 to move in the direction of the elastic clip 21, and the movable pressure block 32 and the fixed pressure block 33 move toward each other. The two elastic clips 21 are pressed against each other to bend and deform the two elastic clips 21 toward each other to clamp the connecting block 11, and further limit the relative movement of the connecting block 11 and the elastic clips 21, so that the handle 2 is not easy to shake when the vehicle is driving, thereby reducing the safety risk during vehicle driving. By twisting the fixed movable pressure block 32 out of the movable clamping shaft 31, and then pulling the movable clamping shaft 31 out of the first clamping groove 211 set by the elastic clip 21 and the second clamping groove 112 set by the connecting block 11, the limit on the relative movement of the handle 2 and the base 1 is released, and then the handle 2 is rotated toward the base 1 to fold, and the grip 36 is connected to the peripheral side wall of the cam 35 to drive the cam 35 to rotate.

[0025] Furthermore, the support shaft 34 is made of damping material so that the cam 35 can stop in the direction of the support shaft 34 to fix the cam 35. The cam 35 is not easily affected by the external environment and rotates on its own, making the cam locking handle 3 more reliable in locking the handle 2 and the base 1.

[0026] Reference Figure 1 and Figure 2 , further, each connecting block 11 is provided with a first avoidance groove 113 running through it, the first avoidance groove 113 is on one side of the second card slot 112 and is connected to the second card slot 112, and the first slot on each elastic clip 21 is provided with two first displacement areas that are connected, one first displacement area is aligned with the second card slot 112, and the other first displacement area is aligned with the first avoidance groove 113, and the cam locking handle 3 is moved back and forth in the two first displacement areas of the first card slot 211 to move the cam locking handle 3 from the second card slot 112 to the first avoidance groove 113 or to move the cam locking handle 3 from the first avoidance groove 113 to the second card slot 112, the first avoidance groove The groove 113 is used to avoid the stack cam locking handle 3 when the handle 2 rotates around the rotating shaft 111. When the movable clamping shaft 31 of the cam locking handle 3 is simultaneously in the first clamping groove 211 set by the elastic clip 21 and the second clamping groove 112 set by the connecting block 11, the handle 2 and the base 1 are locked by the cam locking handle 3. When the movable clamping shaft 31 of the cam locking handle 3 is simultaneously in the first clamping groove 211 set by the elastic clip 21 and the first avoidance groove 113 set by the connecting block 11, the cam locking handle 3 is released from the movable limit of the handle 2 and the base 1, so that the handle 2 can be folded toward the base 1, and there is no need to disassemble the cam locking handle 3, which is more convenient and practical.

[0027] Reference Figure 2 Furthermore, the first avoidance groove 113 is an arc-shaped groove, which extends in a circle with the axis of the rotating shaft 111 as a circle. The number of second card grooves 112 provided on the connecting block 11 is multiple, and the multiple second card grooves 112 are all connected to the first avoidance groove 113, and the multiple second card grooves 112 are arranged at intervals around the axis of the rotating shaft 111. The number of second card grooves 112 on the connecting block 11 is multiple, so that the cam locking handle 3 can be locked into multiple positions, which is conducive to fixing the handle 2 to the base 1 at multiple angles, meeting the needs of different gripping postures of the rider.

[0028] Reference Figure 2 Furthermore, the connecting block 11 is respectively provided with grooves 114 on both sides facing the two elastic clips 21, and plane bearings 115 are installed in the two grooves 114. The two plane bearings 115 are respectively in contact with the two elastic clips 21, and the rotating shaft 111 passes through the center holes of the two plane bearings 115. By setting the plane bearings 115 to contact the elastic clips 21, the auxiliary handle 2 is rotated, reducing the friction between the elastic clips 21 and the connecting block 11 when the handle 2 rotates, making the handle 2 rotate more smoothly and helping to reduce mechanical wear and increase the service life of the handle 2 and the base 1.

[0029] Example 2

[0030] Reference Figure 3 and Figure 4 A folding handlebar comprises a base 1 and two handles 2, each of which is provided with two elastic clips 21 at one end of each handle 2, and a U-shaped groove 22 is formed between the two elastic clips 21. The base 1 is in the shape of a transverse tube, and connecting blocks 11 are provided at both ends of the transverse tube-shaped base 1. The two connecting blocks 11 are respectively inserted into the U-shaped grooves 22 of the two handles 2, and the opposite sides of the connecting blocks 11 are respectively close to the inner sides of the two elastic clips 21. Each connecting block 11 is provided with a rotating shaft 111 passing through it. The two elastic clips 21 on the handle 2 are rotatably connected to the rotating shaft 111, so that the handle 2 is supported by the rotating shaft 111. The handle 2 can rotate around the rotating shaft 111, and the handle 2 can be folded toward the base 1 by rotating the handle 2 around the rotating shaft 111.

[0031] Reference Figure 3 and Figure 4A folding handlebar also includes two cam locking handles 3, which are respectively installed on the two handles 2 and connected to the two elastic clips 21 provided on the handles 2. The two elastic clips 21 of each handle 2 are provided with a first card slot 211 that passes through itself, and each connecting block 11 is provided with a second card slot 112 that passes through itself. The cam locking handle 3 includes a movable card shaft 31, a movable pressure block 32, a fixed pressure block 33, a support shaft 34, a cam 35, and a grip 36. The movable card shaft 31 passes through the second card slot 112 of the connecting block 11, and the two ends of the movable card shaft 31 pass through the first card slot 211 of the two elastic clips 21 respectively. The cam 35 is provided with a through hole which penetrates the cam 35 itself, and the support shaft 34 is inserted into the through hole to realize the rotation connection between the cam 35 and the support shaft 34. A slot is provided in the middle of the peripheral side wall of the cam 35, and the support shaft 34 is connected and fixed to the end of the movable card shaft 31 close to the movable pressure block 32 by avoiding the slot, and the support shaft 34 supports the cam When the cam 35 rotates, the side of the movable pressure block 32 away from the elastic sheet is an arcuate surface 321, and the shaft side wall of the cam 35 abuts against the arcuate surface 321 of the movable pressure block 32, and the relative movement of the limiting connection block 11 and the elastic clip 21 is realized by inserting the cam locking handle 3 into the second slot 112 of the connecting block 11 and the first slot 211 of the two elastic clips 21. When the cam 35 rotates, when the convex part of the side wall of the cam 35 rotates to the movable pressure block 32, the cam 35 presses the movable pressure block 32 in the direction of the elastic clip 21 and pulls the movable card shaft 31 to move and drive the fixed pressure block 33 to move in the direction of the elastic clip 21, and the movable pressure block 32 and the fixed pressure block 33 move toward each other. The two elastic clips 21 are pressed against each other to bend and deform the two elastic clips 21 toward each other to clamp the connecting block 11, and further limit the relative movement of the connecting block 11 and the elastic clips 21, so that the handle 2 is not easy to shake when the vehicle is driving, thereby reducing the safety risk during vehicle driving. By twisting the fixed movable pressure block 32 out of the movable clamping shaft 31, and then pulling the movable clamping shaft 31 out of the first clamping groove 211 set by the elastic clip 21 and the second clamping groove 112 set by the connecting block 11, the limit on the relative movement of the handle 2 and the base 1 is released, and then the handle 2 is rotated toward the base 1 to fold, and the grip 36 is connected to the peripheral side wall of the cam 35 to drive the cam 35 to rotate.

[0032] Furthermore, the support shaft 34 is made of damping material so that the cam 35 can stop in the direction of the support shaft 34 to fix the cam 35. The cam 35 is not easily affected by the external environment and rotates on its own, making the cam locking handle 3 more reliable in locking the handle 2 and the base 1.

[0033] Reference Figure 3 and Figure 4 , Furthermore, the two elastic clips 21 of each handle 2 are provided with a second avoidance groove 212 running through it, the second avoidance groove 212 is on one side of the first card slot 211 and is connected to the first card slot 211, and the second slot on each connecting block 11 is provided with two connected second displacement areas, one second displacement area is aligned with the first card slot 211, and the other second displacement area is aligned with the second avoidance groove 212, and the cam locking handle 3 is moved back and forth in the two second displacement areas of the second card slot 112 to move the cam locking handle 3 from the first card slot 211 to the second avoidance groove 212 or to move the cam locking handle 3 from the second avoidance groove 212 to the first card slot 211, The two avoidance grooves 212 are used to avoid the stack cam locking handle 3 when the handle 2 rotates around the rotating shaft 111. When the movable clamping shaft 31 of the cam locking handle 3 is simultaneously in the first clamping groove 211 set by the elastic clip 21 and the second clamping groove 112 set by the connecting block 11, the handle 2 and the base 1 are locked by the cam locking handle 3. When the movable clamping shaft 31 of the cam locking handle 3 is simultaneously in the first clamping groove 211 set by the elastic clip 21 and the first avoidance groove 113 set by the connecting block 11, the cam locking handle 3 is released from the movable limit of the handle 2 and the base 1, so that the handle 2 can be folded toward the base 1, and there is no need to disassemble the cam locking handle 3, which is more convenient and practical.

[0034] Reference Figure 4 Furthermore, the second avoidance groove 212 is an arc-shaped groove, which extends in a circle with the axis of the rotating shaft 111 as the axis. There are multiple first card grooves 211 provided on the connecting block 11, and the multiple first card grooves 211 are all connected to the second avoidance groove 212, and the multiple first card grooves 211 are arranged at intervals around the axis of the rotating shaft 111. There are multiple first card grooves 211 on the connecting block 11, which enables the cam locking handle 3 to be locked in multiple positions, which is conducive to fixing the handle 2 to the base 1 at multiple angles, meeting the needs of different gripping postures of the rider.

[0035] Reference Figure 4 Furthermore, the connecting block 11 is respectively provided with grooves 114 on both sides facing the two elastic clips 21, and plane bearings 115 are installed in the two grooves 114. The two plane bearings 115 are respectively in contact with the two elastic clips 21, and the rotating shaft 111 passes through the center holes of the two plane bearings 115. By setting the plane bearings 115 to contact the elastic clips 21, the auxiliary handle 2 is rotated, reducing the friction between the elastic clips 21 and the connecting block 11 when the handle 2 rotates, making the handle 2 rotate more smoothly and helping to reduce mechanical wear and increase the service life of the handle 2 and the base 1.

[0036] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A folding handlebar, characterized by: It includes a base and two handles, each of which is provided with two elastic clips at one end, a U-shaped groove is formed between the two elastic clips, and a connecting block is provided at both ends of the base, the two connecting blocks are respectively inserted into the U-shaped grooves of the two handles, and a rotating shaft is provided on the connecting block, and the two elastic clips on the handles are rotatably connected to the rotating shaft; It also includes two cam locking handles, and the two elastic clips of each handle are provided with a first slot running through the two elastic clips, and each connecting block is provided with a second slot running through the two cam locking handles respectively penetrate into the second slots of the two connecting blocks, and the two ends of the cam locking handle respectively penetrate into the first slots of the two elastic clips and are connected to the elastic clips. The cam locking handles are used to bend the two elastic clips toward each other to clamp the connecting block or to release the clamping of the connecting block.

2. A folding handlebar according to claim 1, characterized in that: Each of the connecting blocks is provided with a first avoidance groove running through it, the first avoidance groove is located on one side of the second card slot and is connected to the second card slot, and the first slot on each of the elastic clips is provided with two connected first displacement areas, one first displacement area is aligned with the second card slot, and the other first displacement area is aligned with the first avoidance groove, and the cam locking handle is moved back and forth in the two first displacement areas of the first slot to move the cam locking handle from the second card slot to the first avoidance groove or from the first avoidance groove to the second card slot, and the first avoidance groove is used to avoid the cam locking handle when the handle rotates around the rotating shaft.

3. The folding handlebar according to claim 1, characterized in that: The two elastic clips of each handle are provided with a second avoidance groove running through it, and the second avoidance groove is located on one side of the first card slot and is connected to the first card slot. The second card slot on each connecting block is provided with two connected second displacement areas, one second displacement area is aligned with the first card slot, and the other second displacement area is aligned with the second avoidance groove. The cam locking handle is reciprocated in the two second displacement areas of the second card slot to move the cam locking mechanism from the second avoidance groove to the first card slot or to move the cam locking mechanism from the first card slot to the second avoidance groove. The second avoidance groove is used to avoid the cam locking handle when the handle rotates around the rotating shaft.

4. The folding handlebar according to claim 2, characterized in that: There are multiple second card slots provided on each of the connecting blocks, and the multiple second card slots are all connected to the first avoidance slot, and the multiple second card slots are arranged at intervals around the axis of the rotating shaft.

5. The folding handlebar according to claim 3, characterized in that: There are multiple first card slots provided on each elastic clip, and the multiple first card slots are all connected to the second avoidance slot, and the multiple first card slots are arranged at intervals around the axis of the rotating shaft.

6. The folding handlebar according to claim 1, characterized in that: The connecting block is respectively provided with grooves on both sides facing the two elastic clips, and plane bearings are installed in the two grooves. The two plane bearings are respectively in contact with the two elastic clips, and the rotating shaft passes through the center holes of the two plane bearings.

7. The folding handlebar according to claim 1, characterized in that: The cam locking handle includes an active clamping shaft, a movable pressure block, a fixed pressure block, a support shaft, a cam, and a grip, wherein the active clamping shaft passes through the second clamping groove of the connecting block and the two ends of the active clamping shaft respectively pass through the first clamping grooves of the two elastic clips, one end of the active clamping shaft is threadedly connected to the fixed pressure block, the fixed pressure block abuts against one of the elastic clips on the handle, the active pressure block is provided with an opening and is inserted into the active clamping shaft from the end of the active clamping shaft away from the fixed pressure block through the opening, and the active pressure block abuts against the other elastic clip on the handle, the support shaft is fixedly connected to the end of the active clamping shaft close to the movable pressure block, the support shaft is rotatably connected to the cam to support the rotation of the cam, the side wall of the cam abuts against the side of the active pressure block away from the elastic clip, and the grip is fixedly connected to the side wall of the cam.

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