Surgical jaw device and surgical anastomat

Abstract

The utility model provides a surgical jaw device and a surgical anastomat, and relates to the technical field of surgical instruments, and the surgical jaw device comprises a rotary connecting seat, a mounting rod, a push rod, a rotary sleeve, a steering mechanism and a jaw assembly. According to the surgical jaw device, the push rod and the rotary sleeve are arranged, the push rod and the rotary sleeve are in threaded connection to achieve movement of the push rod, the swing angle of the jaw assembly can be adjusted only by rotating the rotary sleeve during use, and operation is convenient. Due to the fact that the thread structure has self-locking performance, a locking device does not need to be arranged independently, and the structure is simpler. The utility model further provides a surgical anastomat which comprises an operating handle and the surgical jaw device, the surgical anastomat is simple in structure, the swing angle of the jaw assembly can be adjusted by rotating the rotary sleeve at the operating handle, operation is convenient, and stability is high.

Description

Technical Field

[0001] This utility model relates to the field of surgical instruments, and in particular to a surgical clamp device and a surgical stapler. Background Technology

[0002] Anastomosing devices are commonly used in endoscopic surgery to replace traditional open surgical devices because smaller incisions often shorten postoperative recovery time and reduce complications. Therefore, a series of endoscopic surgical instruments have been developed to accurately place distal actuators at the surgical site through a cannula. These distal actuators have been introduced into the tissue in several ways to achieve diagnostic or therapeutic effects.

[0003] When using a stapler, the angle of the jaw assembly needs to be adjusted to suit different surgical sites. Existing staplers hinge the jaw assembly to the main body and lock it using a locking mechanism, such as the one described in Chinese Utility Model Patent CN101327141B, which uses a gear mechanism for locking. However, adjusting the angle of the jaw assembly in existing staplers requires first disengaging the locking mechanism and then manually adjusting the angle, and real-time adjustment is not possible during operation, making it very inconvenient. Furthermore, to ensure a tight locking effect and improve the stability of the jaw assembly, existing locking mechanisms are very complex, resulting in high production costs and susceptibility to damage. Utility Model Content

[0004] The purpose of this invention is to provide a surgical clamp device and a surgical stapler to solve the above-mentioned technical problems.

[0005] In a first aspect, this utility model provides a surgical jaw device, comprising: a rotating connecting seat, a mounting rod, a push rod, a rotating sleeve, a steering mechanism, and a jaw assembly. One end of the mounting rod is connected to the rotating connecting seat, the steering mechanism is rotatably disposed at one end of the mounting rod, the jaw assembly is connected to the steering mechanism, the rotating sleeve is rotatably connected to the rotating connecting seat, the rotating sleeve is provided with an adjusting thread, one end of the push rod is threadedly connected to the rotating sleeve, and the other end of the push rod is driven to cooperate with the steering mechanism. The rotating sleeve is driven to rotate, causing the push rod to move along the length direction, and the jaw assembly is deflected via the steering mechanism.

[0006] Furthermore, the rotating sleeve includes a threaded sleeve and a sleeve housing. The threaded sleeve has an internal threaded hole along its length. One end of the mounting rod passes through the threaded sleeve and is connected to the rotating connecting seat. One end of the push rod is located between the mounting rod and the threaded sleeve and is threadedly connected to the threaded sleeve. The sleeve housing covers the outside of the threaded sleeve.

[0007] Furthermore, the outer wall of the rotating sleeve is provided with an angle indicator, which is used to display the deflection angle of the jaw assembly.

[0008] Furthermore, the inner wall of the sleeve housing is provided with a groove, and the threaded sleeve is engaged in the groove, so that the sleeve housing and the threaded sleeve rotate synchronously.

[0009] Furthermore, the rotating connector is provided with several damping grooves at intervals around its circumference, and the rotating sleeve is provided with corresponding damping protrusions, which can be engaged in any of the damping grooves.

[0010] Furthermore, the outer wall of the rotating sleeve is also provided with anti-slip components.

[0011] Furthermore, the anti-slip component is one or more of the following: anti-slip protrusions, anti-slip stripes, or anti-slip sleeves.

[0012] Furthermore, a limiting groove is provided at one end of the mounting rod near the rotating sleeve, and one end of the push rod is located in the limiting groove, and the push rod slides along the limiting groove.

[0013] Furthermore, a limiting boss is provided on the rotating sleeve, and the push rod abuts against the limiting boss after moving to the limit position.

[0014] On the other hand, this utility model also provides a surgical stapler, which includes: an operating handle and a surgical jaw device as described in any of the above, wherein a rotating connector of the surgical jaw device is rotatably connected to the operating handle.

[0015] The surgical jaw device provided by this utility model is equipped with a push rod and a rotating sleeve. The push rod can be moved by threading the push rod and the rotating sleeve together. In use, the swing angle of the jaw assembly can be adjusted simply by rotating the rotating sleeve, making it easy to operate. Since the threaded structure itself has self-locking properties, there is no need to set up a separate locking device, making the structure simpler. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 Exploded view of the surgical clamping device provided in the embodiment of this utility model;

[0018] Figure 2 A structural diagram of the angle indicator in the surgical clamp device provided in this embodiment of the utility model;

[0019] Figure 3 A front view of the rotating mounting base in the surgical forceps device provided in this embodiment of the utility model;

[0020] Figure 4 A structural diagram of the sleeve housing of the surgical forceps device provided in this embodiment of the utility model;

[0021] Figure 5 A cross-sectional view of the surgical clamping device provided in an embodiment of this utility model;

[0022] Figure 6 A front view of the surgical stapler provided in an embodiment of this utility model.

[0023] Icons: 100-Rotating connector; 200-Mounting rod; 300-Rotating sleeve; 400-Steering mechanism; 500-Jaw assembly; 600-Push rod; 301-Threaded sleeve; 302-Sleeve housing; 3021-Angle indicator; 101-Damping groove; 3022-Damping protrusion; 700-Operating handle. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected 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.

[0026] 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.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0029] Example 1

[0030] This embodiment provides a surgical jaw device, which includes: a rotating connecting seat 100, a mounting rod 200, a push rod 600, a rotating sleeve 300, a steering mechanism 400, and a jaw assembly 500. One end of the mounting rod 200 is connected to the rotating connecting seat 100. The steering mechanism 400 is rotatably disposed at one end of the mounting rod 200. The jaw assembly 500 is connected to the steering mechanism 400. The rotating sleeve 300 is rotatably connected to the rotating connecting seat 100. The rotating sleeve 300 is provided with an adjusting thread. One end of the push rod 600 is threadedly connected to the rotating sleeve 300. The other end of the push rod 600 is driven to rotate in conjunction with the steering mechanism 400. The rotating sleeve 300 is driven to rotate, causing the push rod 600 to move along its length direction, and the jaw assembly 500 is deflected via the steering mechanism 400.

[0031] Please refer to Figure 1 and Figure 5 As shown, in this embodiment, the mounting rod 200 is a hollow tubular structure, and the interior of the mounting rod 200 can be equipped with cables or controllers for operating the jaw assembly 500. The jaw assembly 500 is rotatably mounted on one end of the mounting rod 200 via a steering mechanism 400. The steering mechanism 400 drives the jaw assembly 500 to rotate, and the axis of rotation of the jaw assembly 500 is perpendicular to the mounting rod 200. When the jaw assembly 500 rotates, it forms an angle with the mounting rod 200. During use, the rotation angle of the jaw assembly 500 can be adjusted to adapt to the operational needs in different environments, improving the practicality of the entire device. The other end of the mounting rod 200 is connected to the rotary connecting seat 100, through which the entire surgical jaw device can be mounted on an external operating handle 700 or other medical equipment. The rotary connecting seat 100 is provided with a rotating sleeve 300 and a push rod 600, which form a control mechanism to realize the angle adjustment of the jaw assembly 500. Specifically, the rotating sleeve 300 is rotatably connected to the rotating connecting seat 100, and the rotating sleeve 300 is provided with an adjusting thread. The push rod 600 is slidably connected to the mounting rod 200 and the rotating connecting seat 100. One end of the push rod 600 is threadedly connected to the rotating sleeve 300, and the other end is drivenly connected to the steering mechanism 400. When the operator rotates the rotating sleeve 300, under the action of the adjusting thread on the rotating sleeve 300, the push rod 600 moves along its own length, thereby driving the steering mechanism 400 to swing the jaw assembly 500, thus achieving angle adjustment of the jaw assembly 500. Please refer to... Figure 1As shown, in this embodiment, the rotating sleeve 300 and the push rod 600 are threadedly connected to form a drive device similar to a worm gear mechanism. During use, simply rotating the rotating sleeve 300 adjusts the angle of the jaw assembly 500. The entire adjustment process is performed at the rotating connecting seat 100, allowing for real-time adjustment of the jaw assembly 500's angle. The entire device has a simple structure, is easy to operate, and can achieve stepless adjustment, allowing for fine-tuning of the jaw assembly 500's angle. Simultaneously, the threaded rotating sleeve 300 and push rod 600 have a self-locking effect. The angle of the jaw assembly 500 can only be adjusted by rotating the rotating sleeve 300. Therefore, there is no need to set up a separate locking mechanism for the jaw assembly 500. After the jaw assembly 500 is adjusted to a suitable angle, the self-locking effect of the rotating sleeve 300 and push rod 600 ensures the stability of the jaw assembly 500, preventing it from deflecting under external forces. When the angle of the jaw assembly 500 needs to be adjusted, there is no need to unlock it. Simply rotate the rotating sleeve 300. The operation is quick and smooth without any jamming. To reset the jaw assembly 500, simply rotate the rotating sleeve 300 in the opposite direction.

[0032] Optionally, in some embodiments of this invention, the rotating sleeve 300 includes a threaded sleeve 301 and a sleeve housing 302. The threaded sleeve 301 has an internal threaded hole along its length. One end of the mounting rod 200 passes through the threaded sleeve 301 and is connected to the rotating connecting seat 100. One end of the push rod 600 is located between the mounting rod 200 and the threaded sleeve 301 and is threadedly connected to the threaded sleeve 301. The sleeve housing 302 covers the outside of the threaded sleeve 301.

[0033] Please refer to Figure 1 As shown, in this embodiment, the rotating sleeve 300 includes a threaded sleeve 301 and a sleeve housing 302 that are sleeved together. The threaded sleeve 301 is disposed inside the sleeve housing 302 and rotates synchronously with the sleeve housing 302. The sleeve housing 302 is rotatably mounted on the rotating connecting seat 100. The mounting rod 200 passes through the threaded sleeve 301 and connects to the rotating connecting seat 100. A gap is formed between the mounting rod 200 and the threaded sleeve 301. The threaded end of the push rod 600 is disposed between the mounting rod 200 and the threaded sleeve 301 and engages with the threaded sleeve 301. The mounting rod 200 provides a limiting effect, ensuring that the push rod 600 and the threaded sleeve 301 are always engaged, preventing the push rod 600 from disengaging from the threaded sleeve 301 during adjustment, and improving the stability during adjustment. The threaded sleeve 301 and the sleeve housing 302 are detachably connected. On the one hand, the threaded sleeve 301 and the sleeve housing 302 can be manufactured and assembled separately, reducing production difficulty and production cost. On the other hand, the adjustment effect of the push rod 600 can be changed by replacing different threaded sleeves 301, which facilitates replacement and maintenance.

[0034] Optionally, in some embodiments of this example, the outer wall of the rotating sleeve 300 is provided with an angle indicator 3021, which is used to display the deflection angle of the jaw assembly 500.

[0035] Please refer to Figure 1 and Figure 2 As shown, in this embodiment, the angle indicator 3021 can be a scale line or indicator patch engraved on the outer wall of the rotating sleeve 300, and multiple angle indicator marks 3021 are circumferentially spaced on the outer wall of the rotating sleeve 300. When rotating the rotating sleeve 300, the operator can determine the rotation angle of the jaw assembly 500 by observing the angle indicator marks 3021, which facilitates adjusting the jaw assembly 500 to a suitable angle. It should be noted that in this embodiment, the relationship between the rotation angle of the rotating sleeve 300 and the swing angle of the jaw assembly 500 is determined by the pitch of the adjusting thread on the rotating sleeve 300. During production, the angle indicator marks 3021 can be set according to the actual situation, and the spacing and number of the angle indicator marks 3021 are not limited. Specifically, the jaw assembly 500 can be reset first, and an initial position angle indicator mark 3021 can be set on the rotating sleeve 300. The second step is to rotate the rotating sleeve 300 and measure the angle of the jaw assembly 500. When the jaw assembly 500 rotates to the corresponding angle, the corresponding mark is marked on the rotating sleeve 300, such as a 30-degree mark, a 45-degree mark, etc.

[0036] Optionally, in some embodiments of this example, the inner wall of the sleeve housing is provided with a groove, and the threaded sleeve is engaged in the groove, so that the sleeve housing and the threaded sleeve rotate synchronously.

[0037] Please refer to Figure 1 As shown, in this embodiment, the sleeve housing and the threaded sleeve are detachably connected. To ensure the adjustment effect, the inner side wall of the sleeve housing is provided with a groove, and the threaded sleeve is locked in the groove, so that the sleeve housing and the threaded sleeve rotate synchronously, avoiding relative sliding between the sleeve housing and the threaded sleeve and affecting the adjustment effect.

[0038] Optionally, in some embodiments of this example, the rotating connecting seat 100 is provided with a plurality of damping grooves 101 at intervals around its circumference, and the rotating sleeve 300 is provided with corresponding damping protrusions 3022, which can be engaged in any of the damping grooves 101.

[0039] Please refer to Figure 3 and Figure 4As shown, in this embodiment, the damping protrusion 3022 and the damping groove cooperate to increase the rotational resistance between the rotating sleeve 300 and the rotating connecting seat 100. The damping protrusion 3022 and the damping groove increase resistance, which on the one hand prevents the rotating sleeve 300 from rotating freely, thus avoiding affecting the stability of the jaw assembly 500; on the other hand, it provides rotational feedback to the operator during rotation, making it easier for the operator to adjust the rotating sleeve 300 to adjust the jaw assembly 500 to the corresponding angle.

[0040] Optionally, in some embodiments of this example, the outer wall of the rotating sleeve 300 is further provided with an anti-slip component. The anti-slip component is one or more of the following: anti-slip protrusions, anti-slip stripes, or anti-slip sleeves.

[0041] Please refer to Figure 2 and Figure 4 As shown, in this embodiment, the outer surface of the rotating sleeve 300 is provided with anti-slip protrusions to increase the friction of the rotating sleeve 300 surface and prevent slippage during operation. Optionally, in this embodiment, the anti-slip component can also be set as anti-slip stripes or an anti-slip sleeve can be directly applied to the rotating sleeve 300, as long as the anti-slip effect can be achieved.

[0042] Optionally, in some embodiments of this example, a limiting groove is provided at one end of the mounting rod 200 near the rotating sleeve 300, and one end of the push rod 600 is disposed in the limiting groove, and the push rod 600 slides along the limiting groove.

[0043] In this embodiment, the push rod 600 is positioned between the mounting rod 200 and the rotating sleeve 300. With the support of the mounting rod 200, the mounting rod 200 is always engaged with the adjusting thread on the rotating sleeve 300. Simultaneously, a limiting groove is formed on the mounting rod 200 along the moving direction of the push rod 600, and the push rod 600 is slidably positioned within the limiting groove. The limiting groove limits the push rod 600, ensuring that it moves along its own length and preventing rotation, further improving the stability of the jaw assembly 500 during adjustment.

[0044] Optionally, in some embodiments of this example, a limiting boss is provided on the rotating sleeve 300, and the push rod 600 abuts against the limiting boss after moving to the limit position.

[0045] In this embodiment, the limiting boss is provided at both ends of the adjusting thread. When the push rod 600 moves to the limit position in one direction, the push rod 600 abuts against the limiting boss. The limiting boss blocks the push rod 600, restricts the movement stroke of the push rod 600, and prevents the push rod 600 from disengaging from the adjusting thread. At the same time, it protects the entire device, prevents damage to the rotating sleeve 300 or the push rod 600, and improves the service life of the entire device.

[0046] Example 2

[0047] This embodiment provides a surgical stapler, which includes: an operating handle 700 and a surgical jaw device provided in the above embodiment, wherein the rotating connecting seat 100 of the surgical jaw device is rotatably connected to the operating handle 700.

[0048] Please refer to Figure 6 As shown, in this embodiment, the operating handle 700 is rotatably connected to the rotating connecting seat 100 of the surgical jaw device. The rotating connecting seat 100 can rotate along the axis of the mounting rod 200, thereby rotating the entire surgical jaw device. The surgical stapler provided in this embodiment uses the above-mentioned surgical jaw device, which has a simple structure. The swing angle of the jaw assembly 500 can be adjusted by rotating the rotating sleeve 300 at the operating handle 700, making it convenient to operate and highly stable.

[0049] In summary, this utility model provides a surgical jaw device, comprising: a rotating connecting seat 100, a mounting rod 200, a push rod 600, a rotating sleeve 300, a steering mechanism 400, and a jaw assembly 500. One end of the mounting rod 200 is connected to the rotating connecting seat 100. The steering mechanism 400 is rotatably disposed at one end of the mounting rod 200. The jaw assembly 500 is connected to the steering mechanism 400. The rotating sleeve 300 is rotatably connected to the rotating connecting seat 100. The rotating sleeve 300 is provided with an adjusting thread. One end of the push rod 600 is threadedly connected to the rotating sleeve 300. The other end of the push rod 600 is driven to rotate in conjunction with the steering mechanism 400. The rotating sleeve 300 is driven to rotate, causing the push rod 600 to move along its length, thereby deflecting the steering mechanism 400 and the jaw assembly 500. The push rod 600 is moved by threading the push rod 600 and the rotating sleeve 300. During use, simply rotating the rotating sleeve 300 adjusts the swing angle of the jaw assembly 500, making operation convenient. Because the threaded structure itself is self-locking, no separate locking device is needed, resulting in a simpler structure.

[0050] This utility model also provides a surgical stapler, including: an operating handle 700 and the above-mentioned surgical jaw device. It has a simple structure. The swing angle of the jaw assembly 500 can be adjusted by rotating the rotating sleeve 300 at the operating handle 700. It is easy to operate and has high stability.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A surgical jaw device, characterized by, The surgical forceps device comprises a rotating connecting seat (100), a mounting rod (200), a push rod (600), a rotating sleeve (300), a steering mechanism (400) and a jaw assembly (500), one end of the mounting rod (200) is connected with the rotating connecting seat (100), the steering mechanism (400) is rotationally arranged at one end of the mounting rod (200), the jaw assembly (500) is connected with the steering mechanism (400), the rotating sleeve (300) is rotationally connected with the rotating connecting seat (100), the rotating sleeve (300) is provided with an adjusting thread, one end of the push rod (600) is threadedly connected with the rotating sleeve (300), the other end of the push rod (600) is drivingly matched with the steering mechanism (400), the rotating sleeve (300) is driven to rotate to make the push rod (600) move along the length direction, and the jaw assembly (500) is deflected through the steering mechanism (400). The rotating sleeve (300) comprises a threaded sleeve (301) and a sleeve shell (302), the threaded sleeve (301) is provided with an internal thread hole along the length direction, one end of the mounting rod (200) passes through the threaded sleeve (301) and is connected with the rotating connecting seat (100), one end of the push rod (600) is arranged between the mounting rod (200) and the threaded sleeve (301) and is threadedly connected with the threaded sleeve (301), and the sleeve shell (302) covers the outside of the threaded sleeve (301).

2. The surgical jaw apparatus of claim 1, wherein, An angle indicating mark (3021) is arranged on the outer side wall of the rotating sleeve (300), and the angle indicating mark (3021) is used for displaying the deflection angle of the jaw assembly (500).

3. The surgical jaw apparatus of claim 1, wherein, An inner side wall of the sleeve shell is provided with a clamping groove, the threaded sleeve is clamped in the clamping groove, and the sleeve shell and the threaded sleeve are synchronously rotated.

4. The surgical jaw apparatus of claim 2, wherein, A plurality of damping grooves (101) are arranged on the rotating connecting seat (100) at intervals, and a damping protrusion (3022) is correspondingly arranged on the rotating sleeve (300), and the damping protrusion (3022) can be clamped in any one of the damping grooves (101).

5. The surgical jaw apparatus of any one of Claims 1-4, wherein, An anti-skid assembly is further arranged on the outer side wall of the rotating sleeve (300).

6. The surgical jaw apparatus of any one of claims 1-4, wherein, The anti-skid assembly is one or more of an anti-skid protrusion, an anti-skid stripe and an anti-skid sleeve.

7. The surgical jaw apparatus of claim 6, wherein, One end of the mounting rod (200) close to the rotating sleeve (300) is provided with a limiting sliding groove, one end of the push rod (600) is arranged in the limiting sliding groove, and the push rod (600) slides along the limiting sliding groove.

8. The surgical jaw apparatus of any one of claims 1-4, wherein, A limiting boss is arranged on the rotating sleeve (300), and the push rod (600) abuts against the limiting boss after moving to the limit position.

9. The surgical jaw apparatus of any one of claims 1-4, wherein, The surgical forceps device comprises a rotating connecting seat (100), a mounting rod (200), a push rod (600), a rotating sleeve (300), a steering mechanism (400) and a jaw assembly (500), one end of the mounting rod (200) is connected with the rotating connecting seat (100), the steering mechanism (400) is rotationally arranged at one end of the mounting rod (200), the jaw assembly (500) is connected with the steering mechanism (400), the rotating sleeve (300) is rotationally connected with the rotating connecting seat (100), the rotating sleeve (300) is provided with an adjusting thread, one end of the push rod (600) is threadedly connected with the rotating sleeve (300), the other end of the push rod (600) is drivingly matched with the steering mechanism (400), the rotating sleeve (300) is driven to rotate to make the push rod (600) move along the length direction, and the jaw assembly (500) is deflected through the steering mechanism (400).

10. A surgical stapler, comprising: The rotating sleeve (300) comprises a threaded sleeve (301) and a sleeve shell (302), the threaded sleeve (301) is provided with an internal thread hole along the length direction, one end of the mounting rod (200) passes through the threaded sleeve (301) and is connected with the rotating connecting seat (100), one end of the push rod (600) is arranged between the mounting rod (200) and the threaded sleeve (301) and is threadedly connected with the threaded sleeve (301), and the sleeve shell (302) covers the outside of the threaded sleeve (301). An angle indicating mark (3021) is arranged on the outer side wall of the rotating sleeve (300), and the angle indicating mark (3021) is used for displaying the deflection angle of the jaw assembly (500). An inner side wall of the sleeve shell is provided with a clamping groove, the threaded sleeve is clamped in the clamping groove, and the sleeve shell and the threaded sleeve are synchronously rotated. A plurality of damping grooves (101) are arranged on the rotating connecting seat (100) at intervals, and a damping protrusion (3022) is correspondingly arranged on the rotating sleeve (300), and the damping protrusion (3022) can be clamped in any one of the damping grooves (101). An anti-skid assembly is further arranged on the outer side wall of the rotating sleeve (300). The anti-skid assembly is one or more of an anti-skid protrusion, an anti-skid stripe and an anti-skid sleeve. One end of the mounting rod (200) close to the rotating sleeve (300) is provided with a limiting sliding groove, one end of the push rod (600) is arranged in the limiting sliding groove, and the push rod (600) slides along the limiting sliding groove. A limiting boss is arranged on the rotating sleeve (300), and the push rod (600) abuts against the limiting boss after moving to the limit position.

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