Orthodontic forceps self-grinding tightness adjusting device

Abstract

The application provides a self-grinding tightness adjusting device of an orthodontic forceps, and belongs to the field of adjusting devices.The device comprises a base, a fixed plate is cooperatively installed on the right upper end of the base, a position adjusting assembly is arranged on the upper side of the fixed plate, a top plate is arranged on the upper end of the position adjusting assembly, a rotating assembly is arranged on the upper side of the left end of the base, a horizontal plate is cooperatively installed on the upper end of the rotating assembly, clamping assemblies are arranged on the upper ends of the horizontal plate and the top plate, after the distance between the clamping assemblies is adjusted, two forceps rods of a forceps body are respectively inserted between fixed clamps and movable clamps in the slots on the upper sides of the top plate and the horizontal plate, the rotation of the electric toothed roller is controlled, the toothed roller is relatively engaged on the surface of a tooth ring, the panel can be driven to reciprocatingly rotate upward or downward in the arc-shaped slot, the forceps rod clamped on the upper side of the horizontal plate is rotated around the rotation shaft of the forceps body, the tightness of the forceps body is more fully adjusted, and the use effect of the adjusting device is improved.

Description

Technical Field

[0001] This invention relates to the field of adjustment devices, and more specifically, to a self-grinding tightness adjustment device for orthodontic forceps. Background Technology

[0002] Orthodontic forceps are orthodontic instruments used by orthodontists to assist in the preparation of archwires for orthodontic appliances. They have become an indispensable hand tool in clinical orthodontic treatment. As a medical instrument, the flexibility of use is very important. However, when orthodontic forceps are first made, the fit between the two arms is relatively tight, resulting in a tight opening and closing mechanism that is not flexible. Using them directly in medical settings can easily cause difficulties for doctors, affecting the accuracy of the operation and the treatment effect. For orthodontic forceps with a tight fit between the two arms, multiple opening and closing operations are required to make the forceps more flexible. Manually opening and closing the forceps is inefficient and labor-intensive.

[0003] A search revealed that Chinese patent CN115229607A discloses "A self-grinding tension adjustment device and method for orthodontic forceps," which includes a worktable, a power unit mounted on the worktable, an actuator mounted on the worktable and connected to the power unit to drive the reciprocating motion of the orthodontic forceps, and a fixture mounted on the worktable to fix several orthodontic forceps. This invention, through the arrangement and coordination of the power unit, actuator, and fixture, fixes one arm of the orthodontic forceps with the fixture, drives the actuator to reciprocate, and the actuator drives the other arm of the orthodontic forceps to reciprocate, thereby adjusting the tension of the orthodontic forceps through a reciprocating opening and closing motion. However, it still has the following drawbacks:

[0004] (1) The existing tension adjustment device cannot adjust the distance between the clamping component on the right side that fixes the bottom of the clamp body and the clamping component on the left side. The production of orthodontic clamps has a wide variety of clamp lengths. When adjusting the tension of orthodontic clamps of different sizes, it cannot meet the needs of all sizes of clamp bodies, thus reducing the application range of the adjustment device.

[0005] (2) The existing tension adjustment device moves laterally in the horizontal groove by the left end horizontal plate to pull the clamp rod, so that the insert rod opens and closes laterally through the rotating shaft to achieve the adjustment effect. However, the lateral pulling will change the height of the clamp body, which will not only cause the clamp body to loosen in the clamping assembly, but also cannot fully adjust the rotation angle of the clamp body, thus reducing the adjustment effect.

[0006] Therefore, we have made improvements to this by proposing a self-grinding tightness adjustment device for orthodontic forceps. Summary of the Invention

[0007] The purpose of this invention is to address the problem that existing tension adjustment devices cannot adjust the distance between the clamping component on the right side, which is fixed to the bottom of the forceps, and the clamping component on the left side. Furthermore, the production of orthodontic forceps involves a wide variety of bar lengths, making it impossible to adjust the tension for forceps of all sizes. This limits the application range of the adjustment device. Additionally, existing tension adjustment devices achieve adjustment by moving the left-end horizontal plate laterally within a groove to pull the forceps bar, causing the insert to open and close laterally via a rotating shaft. However, this lateral pulling changes the height of the forceps, causing loosening within the clamping components and failing to fully adjust the rotation angle of the forceps, thus reducing the adjustment effect.

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0009] A self-grinding tightness adjustment device for orthodontic forceps is proposed to improve the above-mentioned problems.

[0010] The present invention is as follows:

[0011] The device includes a base, a fixing plate installed on the upper right side of the base, an adjustment component on the upper side of the fixing plate, a top plate on the upper end of the adjustment component, a rotating component on the upper left side of the base, a horizontal plate installed on the upper end of the rotating component, and clamping components on the upper ends of both the horizontal plate and the top plate.

[0012] As a preferred technical solution of the present invention, the positioning component includes a groove opened in the center of a fixed plate, a slide plate slidably disposed inside the groove, side grooves opened at the front and back of the groove, and side plates that cooperate with the side grooves at the front and back of the slide plate.

[0013] As a preferred technical solution of the present invention, the side plate has an embedded groove inside, and a pull plate is slidably disposed inside the embedded groove.

[0014] As a preferred technical solution of the present invention, a locking block is provided on the outer wall of the pull plate away from the center of the slide plate, and a locking strip is provided on the side wall of the side groove to cooperate with the locking block.

[0015] As a preferred technical solution of the present invention, a spring telescopic rod is fitted on the surface of the pull plate away from the card block.

[0016] As a preferred technical solution of the present invention, the rotating component includes an arc-shaped seat installed on the upper left side of the base, an arc-shaped groove is provided on the arc-shaped surface on the right side of the arc-shaped seat, a panel is slidably disposed inside the arc-shaped groove, and a connecting plate is fitted on the upper surface of the panel.

[0017] As a preferred technical solution of the present invention, the arc-shaped groove is provided with side grooves on the front and rear sides, and toothed rings are provided on the inner walls of the upper and lower sides of the side grooves. Electric toothed rollers that cooperate with the toothed rings are provided on the front and rear sides of the insert plate.

[0018] As a preferred technical solution of the present invention, the clamping assembly includes slots opened inside the upper side of both the top plate and the horizontal plate. A fixed clamp is installed inside the left end of the slot, and a movable clamp is slidably arranged inside the right side of the slot. A fixed bolt is connected to the right end of the movable clamp.

[0019] As a preferred technical solution of the present invention, a limiting block is provided on the lower side of the movable clamp, and a limiting groove that cooperates with the limiting block is provided on the lower side of the slot.

[0020] A method for using a self-grinding tension adjustment device for orthodontic forceps includes the following steps:

[0021] Step 1: Pull the pull plates on both sides of the slide plate in opposite directions to make it slide in the groove, which will drive the locking block to slide into the groove. At the same time, squeeze the spring telescopic rod to make it retract. Pull the slide plate left and right to make it slide in the groove. Adjust the clamp length of the clamp body to adjust the distance between the slide plate and the arc-shaped seat as needed.

[0022] Step 2: After adjustment, release the tension of the pull plate. Push the pull plate outward with the spring telescopic rod, causing the locking block to move from the inside and outside of the groove. This allows the grooves on the surface of the locking block to engage with the grooves on the surface of the locking strip, thus quickly adjusting and fixing the lateral position of the slide plate.

[0023] Step 3: Insert the two clamp bars of the clamp body into the slots on the top and bottom of the top and horizontal plates, respectively, between the fixed clamp and the movable clamp. Twist the fixing bolt to make the movable clamp slide in the slot. The limiting block is embedded in the limiting groove on the bottom side of the slot and slides in a corresponding limiting groove, so that the movable clamp slides stably towards the fixed clamp and firmly clamps the two clamp bars of the clamp body.

[0024] Step 4: Control the rotation of the electric toothed roller so that it meshes with the toothed ring surface. This will drive the insert to rotate up or down in the arc groove, causing the clamp bar held on the upper side of the horizontal plate to rotate around the rotation axis of the clamp body, thus adjusting the tightness of the clamp body.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] In the solution of the present invention:

[0027] 1. By using a sliding plate, side plate, pull plate, spring telescopic rod, locking block, and locking strip, when it is necessary to adjust the tightness of clamps of different lengths, pull the pull plates on both sides of the sliding plate in opposite directions to make them slide in the groove, causing the locking block to slide into the groove. At the same time, squeeze the spring telescopic rod to make it contract, and pull the sliding plate left and right to make it slide in the groove. Adjust the clamp length of the clamp body according to the required tightness to adjust the distance between the sliding plate and the arc-shaped seat. After adjustment, release the pull plate, and the spring telescopic rod pushes the pull plate outward, causing the locking block to move from inside and outside the groove, so that the locking pattern on the surface of the locking block is engaged in the locking pattern on the surface of the locking strip. This allows for quick adjustment and fixation of the lateral position of the sliding plate, enabling rapid adjustment of clamps of different sizes and improving the application range of the adjustment device.

[0028] 2. With the fixed clamp, movable clamp, fixing bolt, insert plate, toothed ring, and electric toothed roller configured, after adjusting the spacing of the clamping components, the two clamping rods of the clamp body are inserted between the fixed clamp and the movable clamp in the slots on the upper side of the top plate and the horizontal plate, respectively. Twisting the fixing bolt causes the movable clamp to slide in the slot, sliding in the limiting groove that matches the limiting block on the lower side of the slot. This allows the movable clamp to slide stably towards the fixed clamp, firmly clamping the two clamping rods of the clamp body. Controlling the rotation of the electric toothed roller causes it to mesh with the toothed ring surface, which drives the insert plate to rotate up or down in the arc groove. This causes the clamping rods clamped on the upper side of the horizontal plate to rotate around the rotation axis of the clamp body, allowing for more thorough adjustment of the clamp tightness and improving the effectiveness of the adjustment device. Attached Figure Description

[0029] Figure 1 This is a frontal view of the overall structure of a self-grinding orthodontic forceps tightness adjustment device provided by the present invention;

[0030] Figure 2 This is a side view of the overall structure of a self-grinding tightness adjustment device for orthodontic forceps provided by the present invention;

[0031] Figure 3 This invention provides a schematic diagram of the adjustment component structure of a self-grinding tightness adjustment device for orthodontic forceps;

[0032] Figure 4 A schematic diagram of the rotating component structure of a self-grinding tightness adjustment device for orthodontic forceps provided by the present invention;

[0033] Figure 5 A partial structural diagram of the rotating component and clamping component of a self-grinding tightness adjustment device for orthodontic forceps provided by the present invention;

[0034] Figure 6 The diagram shows the movable clamp, fixing bolt, and limiting block structure of a self-grinding tightness adjustment device for orthodontic forceps provided by the present invention.

[0035] The image shows:

[0036] 1. Base; 2. Fixing plate; 301. Slide groove; 302. Slide plate; 303. Side groove; 304. Side plate; 305. Embedded groove; 306. Pull plate; 307. Spring telescopic rod; 308. Locking block; 309. Locking strip; 4. Top plate; 501. Arc-shaped seat; 502. Arc-shaped groove; 503. Embedded plate; 504. Side groove; 505. Toothed ring; 506. Electric toothed roller; 507. Connecting plate; 6. Horizontal plate; 701. Slotted; 702. Fixing clamp; 703. Movable clamp; 704. Fixing bolt; 705. Limiting block. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0038] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0041] like Figure 1-6 As shown, this embodiment proposes a self-grinding tightness adjustment device for orthodontic forceps, including a base 1. A fixing plate 2 is installed on the upper right side of the base 1. An adjustment component is provided on the upper side of the fixing plate 2. A top plate 4 is provided on the upper end of the adjustment component. A rotating component is provided on the upper left side of the base 1. A horizontal plate 6 is installed on the upper end of the rotating component. Clamping components are provided on the upper ends of both the horizontal plate 6 and the top plate 4.

[0042] like Figure 2As shown, the adjustment component includes a sliding groove 301 opened in the center of the fixed plate 2. A sliding plate 302 is slidably arranged inside the sliding groove 301. Side grooves 303 are opened at the front and back of the sliding groove 301. Side plates 304 that cooperate with the side grooves 303 are arranged at the front and back of the sliding plate 302. When it is necessary to adjust the tightness of clamps of different lengths, the pull plates 306 on both sides of the sliding plate 302 are pulled in opposite directions to make it slide in the groove 305, which drives the locking block 308 to slide into the groove 305.

[0043] like Figure 3 As shown, the side plate 304 has a groove 305 inside, and a pull plate 306 is slidably disposed inside the groove 305. Pulling the pull plates 306 on both sides of the slide plate 302 in opposite directions makes it slide in the groove 305, causing the locking block 308 to slide into the groove 305. At the same time, it squeezes the spring telescopic rod 307 to retract it, and pulls the slide plate 302 left and right to make it slide in the slide groove 301. The clamp length of the clamp body can be adjusted to adjust the distance between the slide plate 302 and the arc-shaped seat 501 as needed.

[0044] like Figure 3 As shown, a locking block 308 is provided on the outer wall of the pull plate 306 away from the center of the slide plate 302, and a locking strip 309 is provided on the side wall of the side groove 303 to cooperate with the locking block 308. When the pulling force on the pull plate 306 is released, the spring telescopic rod 307 pushes the pull plate 306 outward, causing the locking block 308 to move inward and outward from the groove 305, so that the locking pattern on the surface of the locking block 308 is engaged in the locking pattern on the surface of the locking strip 309, thereby quickly adjusting and fixing the lateral position of the slide plate 302.

[0045] like Figure 3 As shown, a spring telescopic rod 307 is fitted on the surface of the pull plate 306 away from the locking block 308. The spring telescopic rod 307 pushes the pull plate 306 outward, causing the locking block 308 to move in and out of the groove 305, so that the groove on the surface of the locking block 308 is engaged in the groove on the surface of the locking strip 309. This allows for quick adjustment and fixation of the lateral position of the slide plate 302, enabling rapid adjustment for clamps of different sizes.

[0046] like Figure 4 As shown, the rotating assembly includes an arc-shaped seat 501 mounted on the upper left side of the base 1. An arc-shaped groove 502 is provided on the arc-shaped surface of the right side of the arc-shaped seat 501. A plate 503 is slidably disposed inside the arc-shaped groove 502. A connecting plate 507 is fitted on the upper surface of the plate 503. The plate 503 rotates up or down in the arc-shaped groove 502, thereby causing the clamping bar held on the upper side of the horizontal plate 6 to rotate around the rotation axis of the clamp body, so that the tightness of the clamp body can be more fully adjusted.

[0047] like Figure 5As shown, the arc-shaped groove 502 has side grooves 504 on its front and rear sides. The inner walls of the upper and lower sides of the side groove 504 are provided with toothed rings 505. The front and rear sides of the insert plate 503 are provided with electric toothed rollers 506 that cooperate with the toothed rings 505. When the electric toothed rollers 506 rotate, they mesh with the toothed rings 505, which can drive the insert plate 503 to rotate up or down in the arc-shaped groove 502.

[0048] like Figure 1 As shown, the clamping assembly includes slots 701 on the upper sides of both the top plate 4 and the horizontal plate 6. A fixed clamp 702 is installed inside the left end of the slot 701, and a movable clamp 703 is slidably disposed inside the right side of the slot 701. A fixing bolt 704 is connected to the right end of the movable clamp 703. The movable clamp 703 slides in a limiting groove that is embedded in the lower side of the slot 701 and cooperates with it, so that the movable clamp 703 slides stably toward the fixed clamp 702 to firmly clamp the two clamp bars of the clamp body.

[0049] like Figure 6 As shown, a limiting block 705 is provided on the lower side of the movable clamp 703, and a limiting groove that cooperates with the limiting block 705 is provided on the lower side of the slot 701. Twisting the fixing bolt 704 causes the movable clamp 703 to slide in the slot 701. The limiting block 705 slides in the limiting groove provided on the lower side of the slot 701, so that the movable clamp 703 can slide stably towards the fixing clamp 702 to firmly clamp the two clamp bars of the clamp body.

[0050] A method for using a self-grinding tension adjustment device for orthodontic forceps includes the following steps:

[0051] Step 1: Pull the pull plates 306 on both sides of the slide plate 302 in opposite directions to make it slide in the groove 305, drive the locking block 308 to slide in the groove 305, and at the same time squeeze the spring telescopic rod 307 to make it retract. Pull the slide plate 302 left and right to make it slide in the slide groove 301. Adjust the clamp length of the clamp body to adjust the distance between the slide plate 302 and the arc-shaped seat 501 as needed.

[0052] Step 2: After adjustment, release the tension of the pull plate 306. The spring telescopic rod 307 pushes the pull plate 306 outward, causing the locking block 308 to move in and out of the groove 305, so that the groove on the surface of the locking block 308 is engaged in the groove on the surface of the locking strip 309, thereby quickly adjusting and fixing the lateral position of the slide plate 302.

[0053] Step 3: Insert the two clamp bars of the clamp body into the slot 701 on the top plate 4 and the horizontal plate 6 respectively between the fixed clamp 702 and the movable clamp 703. Twist the fixed bolt 704 to make the movable clamp 703 slide in the slot 701. The limiting block 705 is embedded in the limiting groove on the lower side of the slot 701 and slides in a corresponding limiting groove, so that the movable clamp 703 slides stably towards the fixed clamp 702 to firmly clamp the two clamp bars of the clamp body.

[0054] Step 4: Control the electric toothed roller 506 to rotate so that it meshes with the toothed ring 505. This will drive the insert plate 503 to rotate up or down in the arc groove 502, thereby causing the clamp bar held on the upper side of the horizontal plate 6 to rotate around the rotation axis of the clamp body, thus adjusting the tightness of the clamp body.

[0055] Specifically, when using this adjustment device: To adjust the tightness of clamps of different lengths, pull the pull plates 306 on both sides of the slide plate 302 in opposite directions, causing them to slide within the groove 305. This causes the locking block 308 to slide into the groove 305, while simultaneously compressing the spring telescopic rod 307 to retract it. Pull the slide plate 302 left and right to make it slide within the slide groove 301. Adjust the clamp rod length according to the required tightness to adjust the distance between the slide plate 302 and the arc-shaped seat 501. After adjustment, release the tension on the pull plate 306. The spring telescopic rod 307 pushes the pull plate 306 outward, causing the locking block 308 to move in and out of the groove 305, so that the grooves on the surface of the locking block 308 engage with the grooves on the surface of the locking strip 309. This allows for quick adjustment and fixation of the lateral position of the slide plate 302, facilitating adjustments for different sizes. The clamps of the same size can be quickly adjusted. After adjusting the spacing of the clamping components, insert the two clamping rods of the clamps into the slots 701 on the top plate 4 and the horizontal plate 6, respectively, between the fixed clamp 702 and the movable clamp 703. Twist the fixed bolt 704 to make the movable clamp 703 slide in the slot 701. The limit block 705 is embedded in the limit groove on the lower side of the slot 701 and slides in a corresponding limit groove. This allows the movable clamp 703 to slide stably towards the fixed clamp 702, firmly clamping the two clamping rods of the clamps. Control the rotation of the electric toothed roller 506 so that it meshes with the toothed ring 505. This will drive the insert plate 503 to rotate up or down in the arc groove 502, so that the clamping rods clamped on the upper side of the horizontal plate 6 rotate around the rotation axis of the clamps, allowing for more thorough adjustment of the clamp tightness.

[0056] All technical features in this embodiment can be freely combined according to actual needs.

[0057] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

Claims

1. A self-grinding orthodontic forceps tightness adjustment device, comprising a base (1), characterized in that: A fixing plate (2) is installed on the upper right side of the base (1). An adjustment component is provided on the upper side of the fixing plate (2). A top plate (4) is provided on the upper end of the adjustment component. A rotating component is provided on the upper left side of the base (1). A horizontal plate (6) is installed on the upper end of the rotating component. Clamping components are provided on the upper ends of both the horizontal plate (6) and the top plate (4).

2. The orthodontic forceps self-grinding tightness adjustment device according to claim 1, characterized in that, The adjustment component includes a groove (301) opened in the center of the fixed plate (2), a slide plate (302) is slidably arranged inside the groove (301), side grooves (303) are opened at the front and back of the groove (301), and side plates (304) that cooperate with the side grooves (303) are arranged at the front and back of the slide plate (302).

3. The orthodontic forceps self-grinding tightness adjustment device according to claim 2, characterized in that, The side plate (304) has a groove (305) inside, and a pull plate (306) is slidably disposed inside the groove (305).

4. The orthodontic forceps self-grinding tightness adjustment device according to claim 3, characterized in that, The outer wall of the pull plate (306) away from the center of the slide plate (302) is provided with a locking block (308), and the side wall of the side groove (303) is provided with a locking strip (309) that cooperates with the locking block (308).

5. The orthodontic forceps self-grinding tightness adjustment device according to claim 4, characterized in that, A spring telescopic rod (307) is fitted on the surface of the pull plate (306) away from the locking block (308).

6. The orthodontic forceps self-grinding tightness adjustment device according to claim 1, characterized in that, The rotating assembly includes an arc-shaped seat (501) installed on the upper left side of the base (1), an arc-shaped groove (502) is provided on the arc-shaped surface on the right side of the arc-shaped seat (501), a panel (503) is slidably arranged inside the arc-shaped groove (502), and a connecting plate (507) is installed on the upper surface of the panel (503).

7. The orthodontic forceps self-grinding tightness adjustment device according to claim 6, characterized in that, The arc-shaped groove (502) has side grooves (504) on its front and rear sides. The inner walls of the upper and lower sides of the side groove (504) are provided with toothed rings (505). The front and rear sides of the insert plate (503) are provided with electric toothed rollers (506) that cooperate with the toothed rings (505).

8. The orthodontic forceps self-grinding tightness adjustment device according to claim 1, characterized in that, The clamping assembly includes slots (701) on the upper sides of the top plate (4) and the horizontal plate (6). A fixed clamp (702) is installed inside the left end of the slot (701), and a movable clamp (703) is slidably arranged inside the right side of the slot (701). A fixing bolt (704) is connected to the right end of the movable clamp (703).

9. The orthodontic forceps self-grinding tightness adjustment device according to claim 8, characterized in that, The movable clamp (703) is provided with a limiting block (705) on its lower side, and the slot (701) is provided with a limiting groove that cooperates with the limiting block (705) on its lower side.

10. A method of using a self-grinding tightness adjustment device for orthodontic forceps according to any one of claims 1-9, characterized in that: Includes the following steps: Step 1: Pull the pull plates (306) on both sides of the slide plate (302) in opposite directions to make it slide in the groove (305), drive the locking block (308) to slide in the groove (305), and at the same time squeeze the spring telescopic rod (307) to make it contract. Pull the slide plate (302) left and right to make it slide in the slide groove (301). Adjust the clamp length of the clamp body to adjust the distance between the slide plate (302) and the arc seat (501) as needed. Step 2: After adjustment, release the tension of the pull plate (306), and the spring telescopic rod (307) pushes the pull plate (306) outward, causing the locking block (308) to move inward and outward from the groove (305), so that the pattern on the surface of the locking block (308) is engaged in the pattern on the surface of the locking strip (309), thereby quickly adjusting and fixing the lateral position of the slide plate (302); Step 3: Insert the two clamp rods of the clamp body into the slot (701) on the top plate (4) and the horizontal plate (6) respectively between the fixed clamp (702) and the movable clamp (703). Twist the fixed bolt (704) to make it slide the movable clamp (703) in the slot (701). The movable clamp (703) slides in the limiting block (705) which is embedded in the limiting groove on the lower side of the slot (701) and cooperates with it. This makes the movable clamp (703) slide steadily towards the fixed clamp (702) to firmly clamp the two clamp rods of the clamp body. Step 4: Control the electric toothed roller (506) to rotate so that it meshes with the toothed ring (505) surface. This will drive the insert (503) to rotate up or down in the arc groove (502), thereby causing the clamp bar held on the upper side of the horizontal plate (6) to rotate around the rotation axis of the clamp body, thus adjusting the tightness of the clamp body.

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