Anesthesia mask fixation device adapted for lateral surgical procedures

Abstract

The application provides a kind of anesthesia mask fixing device for adapting lateral operation, it is related to anesthesia mask supporting facilities technical field, including: operating table, fixed component;The bottom four sides of operating table are fixedly connected with support vertical pole, the bottom of support vertical pole is fixedly connected with connecting chassis, and one end of the top of operating table is provided with fixed component, the fixed component includes fixed recess, moving convex plate, fixed support frame and positioning support plate;The fixed recess is arranged at one end of the top of operating table, through the setting of fixed component, the rotation of bidirectional screw rod driven by motor can drive the synchronous displacement of fixed support frame and positioning support plate, so that anesthesia mask can be accurately fixed at the position of patient's mouth and nose, and at the same time, the semicircular groove in the positioning support plate is used to fit the back of the head of the patient, to realize head limiting constraint, effectively limit the left and right deviation of patient's head, ensure that anesthesia mask is in full contact with the patient, avoid the safety risk caused by mask displacement during operation, and ensure the safety of the patient during operation.

Description

Technical Field

[0001] This invention relates to the technical field of anesthesia mask accessories, and in particular to an anesthesia mask fixation device adapted for lateral decubitus surgery. Background Technology

[0002] In clinical surgery, the lateral decubitus position is a commonly used surgical position in departments such as orthopedics, thoracic surgery, and urology, and is suitable for various surgical scenarios such as spinal surgery, thoracic surgery, and kidney surgery. In general anesthesia, the anesthesia mask is a core device for maintaining intraoperative ventilation and ensuring respiratory function, and its fixation and stability directly affect the anesthetic effect and surgical safety.

[0003] Based on the above, there are currently two main methods for fixing anesthesia masks in clinical practice: one is for medical staff to manually support and fix the mask to ensure stable ventilation during surgery; however, for prolonged lateral decubitus surgery, the continuous manual support by medical staff is extremely labor-intensive, and their arms are prone to fatigue and tremors, which can lead to mask displacement and poor fit; the other is to use a conventional elastic headband for fixation. When the patient is lying on their side, the head is subjected to force on one side, which can lead to uneven force on the headband and unidirectional traction and displacement, ultimately causing the anesthesia mask to shift. Both fixation methods are prone to mask leakage, which can lead to anesthetic gas leakage, insufficient ventilation during surgery, directly interfering with the depth of anesthesia, disrupting the patient's respiratory homeostasis, and posing significant surgical safety risks. Summary of the Invention

[0004] In view of this, the present invention provides an anesthesia mask fixation device adapted for lateral decubitus surgery. Through the setting of the fixation components, the bidirectional lead screw driven by the motor can rotate, which can drive the fixed support frame and the positioning support plate to move synchronously, so that the anesthesia mask is accurately fixed at the position of the patient's mouth and nose. At the same time, the semi-circular groove inside the positioning support plate fits against the back of the patient's head to achieve head restraint, effectively limiting the lateral displacement of the patient's head, ensuring that the anesthesia mask fits and is aligned throughout the procedure, avoiding the safety risks caused by mask displacement during the operation, and ensuring the safety of the patient during the operation.

[0005] This invention provides an anesthesia mask fixation device adapted for lateral decubitus surgery, specifically including: an operating table and a fixation component;

[0006] The operating table has support vertical rods fixedly connected to the four sides of the bottom, and a connecting base frame fixedly connected to the bottom of the support vertical rods. A fixing component is provided at one end of the top of the operating table. The fixing component includes a fixing recess, a movable protruding plate, a fixing support frame, and a positioning support plate. The fixed recess is located at one end of the top of the operating table. A bidirectional screw is rotatably installed between the fixed recesses. The bidirectional screw has opposite external threads on the left and right sides. One end of the bidirectional screw passes through the fixed recess and is fixedly connected to the drive end of the drive motor. Two sets of movable protruding plates are provided between the fixed recesses. The movable protruding plates are provided with a first screw hole, which meshes with the external thread of the bidirectional lead screw. A guide side groove is provided in the middle of the fixed recess. One side of the movable protruding plate passes through the guide side groove and is fixedly connected to the connecting support plate. A fixed support frame is fixedly connected to the end of the connecting support plate on one side. An installation frame is fixedly connected to the fixed support frame. An anesthesia mask is installed inside the installation frame. One side of the anesthesia mask has a flexible outer edge, and a connecting tube is fixedly connected to the anesthesia mask. The end of the connecting support plate on the other side is fixedly connected to a positioning support plate, and a semi-circular groove is opened inside the positioning support plate.

[0007] Furthermore, a sponge pad is provided in the groove of the positioning support plate.

[0008] Furthermore, one end of the fixed recess is provided with an adjustment component, which includes a connecting side plate and a fixed crossbar. The connecting side plate is fixedly connected to one end of the fixed recess, and the other end of the connecting side plate is fixedly connected to a movable vertical cylinder. A through groove is opened inside the connecting side plate, and two sets of fixed crossbars are fixedly connected in the through groove. A spring is provided on the outside of the fixed crossbar.

[0009] Furthermore, a movable slide bar is provided between the fixed crossbars. Connecting ear plates are fixedly connected to the upper and lower sides of the movable slide bar. Movable sliding holes are provided on the connecting ear plates. The movable slide bar is slidably installed on the fixed crossbar through the connecting ear plates. A toggle plate is fixedly connected to one end of the movable slide bar.

[0010] Furthermore, the inner side of the movable vertical cylinder is provided with an adjusting vertical rod, and a locking hole is opened on the side of the adjusting vertical rod. At the same time, the other end of the movable slide rod is inserted into the locking hole.

[0011] Furthermore, the bottom of the adjusting vertical rod is provided with an adapter component, which includes a fixed base block, a connecting base plate and an extension support plate. The fixed base block is fixedly connected to the bottom of the adjusting vertical rod, the bottom of the fixed base block is fixedly connected to the connecting base plate, and the top side of the fixed base block is fixedly connected to the extension support plate.

[0012] Furthermore, a threaded rod is rotatably installed between the extension support plate and the connecting base plate. The threaded rod has an external thread structure, and an operating handle is fixedly connected to one end of the threaded rod.

[0013] Furthermore, a movable belt plate is provided between the extension support plate and the connecting base plate. A second screw hole is provided in the middle of the movable belt plate. The second screw hole is rotatably engaged with the external thread of the threaded rod. A through groove is provided in the middle of the fixed base block. One side of the clamping protrusion passes through the through groove and is fixedly connected to the movable belt plate. At the same time, the connecting base plate and the clamping protrusion are clamped on the connecting base frame.

[0014] The anesthesia mask fixation device adapted for lateral decubitus surgery provided by the present invention has the following beneficial effects: By setting up a fixed component and driving a bidirectional lead screw to rotate via a motor, the fixed support frame and the positioning support plate can be moved synchronously, so that the anesthesia mask is precisely fixed in the position of the patient's mouth and nose. At the same time, the semi-circular groove inside the positioning support plate fits against the back of the patient's head to achieve head restraint, effectively limiting the left and right displacement of the patient's head, ensuring that the anesthesia mask fits and is in position throughout the procedure, avoiding the safety risks caused by mask displacement during the operation, and ensuring the safety of the patient during the operation.

[0015] By adjusting the component settings, the movable slide bar can be retracted and slid by pulling the actuating plate, allowing the fixing component to be installed onto the adjusting vertical rod via the movable vertical cylinder. Furthermore, by sliding the movable vertical cylinder up and down, the overall height of the fixing component and the anesthesia mask can be adjusted to match the height position of the patient's face. At the same time, the movable slide bar is connected to the ear plate to compress the spring, and the elastic reaction force generated by the spring achieves automatic rebound locking, which can automatically lock the height-adjusted device onto the adjusting vertical rod, effectively preventing the device from shifting in height during surgery.

[0016] By setting up the adapter components, the moving belt plate and clamping convex plate are displaced through the threaded engagement of the threaded rod. The device can be quickly clamped and fixed to the bottom of the operating table in conjunction with the connecting base plate. This improves the flexibility of the device, making it adaptable to different operating tables. Furthermore, the installation position of the device can be flexibly adjusted according to the patient's lateral position, thus improving its clinical applicability.

[0017] This device adopts an assembly-type fixation structure for the operating table, which is different from the two traditional fixation methods. It can completely avoid the problem of headband shifting due to unilateral force and fatigue of medical staff in the lateral decubitus position and mask displacement. It is specially adapted for use in various lateral decubitus surgical anesthesia. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram: Figure 1 A schematic diagram of the overall structure according to the present invention is shown; Figure 2 A schematic diagram of the fixing component, adjusting component, and adapter component according to the present invention is shown; Figure 3 A schematic diagram of the fixing component structure according to the present invention is shown; Figure 4A schematic diagram of the partial component disassembly structure in the fixed assembly according to the present invention is shown; Figure 5 A schematic diagram of the adjustment component structure according to the present invention is shown; Figure 6 A schematic diagram of the structure of some components in the adjustment assembly according to the present invention is shown; Figure 7 A schematic diagram of the adapter component structure according to the present invention is shown; Figure 8 A schematic diagram of the structure of some components in the adapter assembly according to the present invention is shown; List of reference numerals 1. Operating table; 101. Supporting vertical rod; 1011. Connecting base frame; 2. Fixing components; 201. Fixed recess; 2011. Double-acting lead screw; 2012. Drive motor; 202. Movable convex plate; 2021. First screw hole; 2022. Guide side groove; 2023. Connecting support plate; 203. Fixed support frame; 2031. Mounting frame; 2032. Anesthesia mask; 2033. Flexible outer rim; 2034. Connecting pipe; 204. Positioning support plate; 2041. Sponge pad; 3. Adjustment components; 301. Movable vertical cylinder; 3011. Connecting side plate; 3012. Through groove; 302. Fixed crossbar; 3021. Spring; 303. Movable slide bar; 3031. Connecting ear plate; 3032. Movable sliding hole; 3033. Actuating plate; 304. Adjusting vertical rod; 3041. Locking socket; 4. Adapted components; 401. Fixed base block; 4011. Connecting base plate; 4012. Extending support plate; 402. Threaded rod; 4021. Operating handle; 403, Moving belt plate; 4031, Second screw hole; 4032, Clamping protrusion; 4033, Through slot. Detailed Implementation

[0021] Example 1: Please refer to Figures 1 to 8 : This invention proposes an anesthesia mask fixation device adapted for lateral decubitus surgery, comprising: an operating table 1 and a fixation component 2; The operating table 1 has a support vertical rod 101 fixedly connected to the four sides of the bottom. The bottom of the support vertical rod 101 is fixedly connected to the connecting base frame 1011. The top end of the operating table 1 is provided with a fixing component 2, which includes a fixing recess 201, a movable protruding plate 202, a fixing support frame 203, and a positioning support plate 204. The fixed recess 201 is located at one end of the top of the operating table 1. A bidirectional screw 2011 is rotatably installed between the fixed recesses 201. The bidirectional screw 2011 has opposite external threads on its left and right sides. One end of the bidirectional screw 2011 passes through the fixed recess 201 and is fixedly connected to the drive end of the drive motor 2012. Two sets of movable protruding plates 202 are provided between the fixed recess 201. The movable protruding plate 202 is provided with a first screw hole 2021. The first screw hole 2021 is engaged with the external thread of the bidirectional lead screw 2011. A guide side groove 2022 is provided in the middle of the fixed recess 201. One side of the movable protruding plate 202 passes through the guide side groove 2022 and is fixedly connected to the connecting support plate 2023. A fixed support frame 203 is fixedly connected to the end of the connecting support plate 2023 on one side. A mounting frame 2031 is fixedly connected to the fixed support frame 203. An anesthesia mask 2032 is installed inside the mounting frame 2031. A flexible outer rim 2033 is provided on one side of the anesthesia mask 2032. A connecting tube 2034 is fixedly connected to the anesthesia mask 2032. A positioning support plate 204 is fixedly connected to the end of the connecting support plate 2023 on the other side. A semi-circular groove is provided inside the positioning support plate 204.

[0022] A sponge pad 2041 is provided in the groove of the positioning support plate 204.

[0023] First, the anesthesia mask 2032 is installed into the mounting frame 2031, with the flexible outer edge 2033 secured to the outside of the mounting frame 2031. Then, the patient is placed on the operating table 1 in a lateral position. Next, the drive motor 2012 is started to rotate the bidirectional lead screw 2011, causing it to engage with the first screw hole 2021 on the movable convex plate 202. The movable convex plate 202 is then guided and limited in the guide side groove 2022, allowing the two sets of movable convex plates 202 to move synchronously relative to each other. The movable convex plates 202, through the connecting support plate 2023, respectively drive the fixed support frame 2031. 3. The positioning support plate 204 is moved synchronously so that the anesthesia mask 2032 installed in the mounting frame 2031 is aligned with the patient's mouth and nose. At the same time, the semi-circular groove inside the positioning support plate 204 fits against the back of the patient's head. The sponge pad 2041 set in the groove achieves flexible fit and limit, preventing the patient's head from shifting. During anesthesia, the flexible outer edge 2033 ensures the sealing of the anesthesia mask 2032 against the face and also prevents the patient's face from being squeezed during fit. The anesthesia gas supply equipment is connected to the external anesthesia pipe 2034 to complete the mask stabilization and anesthesia ventilation for patients undergoing lateral decubitus surgery.

[0024] Example 2, based on Example 1, wherein as follows Figure 5 and Figure 6 As shown, one end of the fixed recess 201 is provided with an adjustment component 3. The adjustment component 3 includes a connecting side plate 3011 and a fixed crossbar 302. The connecting side plate 3011 is fixedly connected to one end of the fixed recess 201. The other end of the connecting side plate 3011 is fixedly connected to a movable vertical cylinder 301. A through groove 3012 is provided inside the connecting side plate 3011. Two sets of fixed crossbars 302 are fixedly connected in the through groove 3012. A spring 3021 is provided on the outside of the fixed crossbar 302.

[0025] A movable slide bar 303 is provided between the fixed crossbars 302. Connecting ear plates 3031 are fixedly connected to the upper and lower sides of the movable slide bar 303. Movable sliding holes 3032 are provided on the connecting ear plates 3031. The movable slide bar 303 is slidably installed on the fixed crossbar 302 through the connecting ear plates 3031. A toggle plate 3033 is fixedly connected to one end of the movable slide bar 303.

[0026] The inner side of the movable vertical cylinder 301 is provided with an adjusting vertical rod 304, and the side of the adjusting vertical rod 304 is provided with a locking hole 3041. At the same time, the other end of the movable slide rod 303 is inserted into the locking hole 3041.

[0027] By manually pulling the actuating plate 3033, the movable slide rod 303 slides as a whole. The movable slide rod 303 slides along the fixed crossbar 302 through the movable sliding hole 3032 on the connecting ear plate 3031, while compressing the spring 3021 on the outside of the fixed crossbar 302, so that the end of the movable slide rod 303 is pulled out from the locking hole 3041 of the adjusting vertical rod 304, releasing the locked state. At this time, the movable vertical cylinder 301 can be slid up and down. The movable vertical cylinder 301 slides vertically along the adjusting vertical rod 304 with the connecting side plate 3011, thereby adjusting the overall height of the top fixing component 2 and the anesthesia mask 2032 to match the height position of the patient's face. After the height adjustment is completed, the actuating plate 3033 is released, the spring 3021 elastically returns to its original position, pushes the connecting ear plate 3031 to drive the movable slide rod 303 to automatically rebound, so that the end of the movable slide rod 303 is re-inserted into the corresponding height locking hole 3041, completing the vertical height locking.

[0028] Example 3, based on Examples 1 and 2, wherein as follows: Figure 7 and Figure 8 As shown, the bottom of the adjusting vertical rod 304 is provided with an adapter component 4. The adapter component 4 includes a fixed base block 401, a connecting base plate 4011 and an extension support plate 4012. The fixed base block 401 is fixedly connected to the bottom of the adjusting vertical rod 304. The bottom of the fixed base block 401 is fixedly connected to the connecting base plate 4011, and the top side of the fixed base block 401 is fixedly connected to the extension support plate 4012.

[0029] A threaded rod 402 is rotatably mounted between the extension support plate 4012 and the connecting base plate 4011. The threaded rod 402 has an external thread structure, and one end of the threaded rod 402 is fixedly connected to an operating handle 4021.

[0030] A movable belt plate 403 is provided between the extension support plate 4012 and the connecting base plate 4011. A second screw hole 4031 is provided in the middle of the movable belt plate 403. The second screw hole 4031 is rotated and engaged with the external thread of the threaded rod 402. A through groove 4033 is provided in the middle of the fixed base block 401. One side of the clamping protrusion 4032 passes through the through groove 4033 and is fixedly connected to the movable belt plate 403. At the same time, the connecting base plate 4011 and the clamping protrusion 4032 are clamped on the connecting base frame 1011.

[0031] By placing the connecting base plate 4011 against the lower side of the connecting base frame 1011, rotating the operating handle 4021 drives the threaded rod 402 to rotate; causing the moving belt plate 403 to engage with the threaded rod 402 through the second screw hole 4031, thereby driving the moving belt plate 403 to move. The moving belt plate 403 then drives the clamping protrusion 4032 to move in the through groove 4033, so that the clamping protrusion 4032 and the connecting base plate 4011 come closer to each other. The two cooperate to clamp and fix the device to the connecting base frame 1011 at the bottom of the operating table 1 in both directions, thus completing the fixation of the device; by adjusting the patient's lateral position, the adapter component 4 is installed in the direction of the patient's back, thereby adapting to the surgical needs of different lateral positions.

[0032] The specific usage and function of this embodiment: In this invention, the connecting base plate 4011 is first placed against the lower side of the connecting base frame 1011. Then, the operating handle 4021 is rotated to drive the threaded rod 402 to rotate. This causes the moving belt plate 403 to engage with the threaded rod 402 through the second screw hole 4031, thereby driving the moving belt plate 403 to move. The moving belt plate 403 then drives the clamping protrusion 4032 to move in the through groove 4033, so that the clamping protrusion 4032 and the connecting base plate 4011 come closer to each other and are clamped and fixed to the connecting base frame 1011 at the bottom of the operating table 1 in both directions. The adapter component 4 is positioned according to the patient's lateral position. The mask is installed on the patient's back to accommodate different lateral surgical positions. Then, manually pull the actuating plate 3033 to move the movable slide rod 303. The movable slide rod 303 slides along the fixed crossbar 302 through the movable sliding hole 3032 on the connecting ear plate 3031, simultaneously compressing the spring 3021 on the outside of the fixed crossbar 302, causing the movable slide rod 303 to retract. It is then installed on the outside of the adjusting vertical rod 304 via the movable vertical cylinder 301, allowing its overall position to be adjusted by sliding the movable vertical cylinder 301 up and down, ensuring the anesthesia mask 2032 is adjusted to fit the patient's facial height. After height adjustment, release the actuating plate 303. 3. Spring 3021 elastically resets, pushing the connecting ear plate 3031 to drive the movable slide rod 303 to automatically rebound, so that the end of the movable slide rod 303 is re-inserted into the corresponding height locking hole 3041, completing the vertical height locking. Then, the anesthesia mask 2032 is installed into the mounting frame 2031, so that the flexible outer edge 2033 is locked on the outside of the mounting frame 2031. Next, the patient is placed on the operating table 1 and placed in a lateral position. Then, the drive motor 2012 is started to drive the bidirectional lead screw 2011 to rotate. The bidirectional lead screw 2011 rotates and engages with the first screw hole 2021 on the moving convex plate 202. However, the moving convex plate 202... The guide side groove 2022 limits and guides the two sets of movable convex plates 202 to move synchronously relative to each other. The movable convex plates 202 drive the fixed support frame 203 and the positioning support plate 204 to move synchronously through the connecting support plate 2023, so that the anesthesia mask 2032 assembled in the mounting frame 2031 is aligned with the patient's mouth and nose. At the same time, the semi-circular groove inside the positioning support plate 204 fits the back of the patient's head, and the sponge pad 2041 set in the groove achieves flexible fit and limitation to prevent the patient's head from shifting. Finally, the anesthesia gas supply equipment can be connected to the external anesthesia gas supply equipment through the connecting pipe 2034 to complete the mask stabilization and anesthesia ventilation operation for the lateral decubitus surgery patient.

Claims

1. An anesthesia mask fixation device adapted for lateral decubitus surgery, comprising: Operating table (1), fixation components (2); The operating table (1) has a support vertical rod (101) fixedly connected to the four sides of the bottom, and a connecting base frame (1011) fixedly connected to the bottom of the support vertical rod (101). The operating table (1) has a fixing component (2) at one end of the top. The fixing component (2) includes a fixing recess (201), a movable protruding plate (202), a fixing support frame (203), and a positioning support plate (204). The fixed recess (201) is located at one end of the top of the operating table (1). A bidirectional screw (2011) is rotatably installed between the fixed recesses (201). The bidirectional screw (2011) has opposite external threads on the left and right sides. One end of the bidirectional screw (2011) passes through the fixed recess (201) and is fixedly connected to the drive end of the drive motor (2012). Two sets of movable protruding plates (202) are provided between the fixed recess (201). The movable protruding plate (202) is provided with a first screw hole (2021). The first screw hole (2021) is engaged with the external thread of the double-acting screw (2011). A guide side groove (2022) is provided in the middle of the fixed recess (201). One side of the movable protruding plate (202) passes through the guide side groove (2022) and is fixedly connected to the connecting support plate (2023). A fixed support frame (203) is fixedly connected to the end of the connecting support plate (2023). The fixed support frame (203) is fixedly connected to the mounting frame (2031), and the anesthesia mask (2032) is installed inside the mounting frame (2031). The anesthesia mask (2032) has a flexible outer edge (2033) on one side, and a connecting tube (2034) is fixedly connected to the anesthesia mask (2032). The end of the connecting support plate (2023) on the other side is fixedly connected to a positioning support plate (204), and a semi-circular groove is opened inside the positioning support plate (204).

2. The anesthesia mask fixation device adapted for lateral decubitus surgery according to claim 1, characterized in that: The groove of the positioning support plate (204) is provided with a sponge pad (2041).

3. The anesthesia mask fixation device adapted for lateral decubitus surgery according to claim 1, characterized in that: One end of the fixed recess (201) is provided with an adjustment component (3). The adjustment component (3) includes a connecting side plate (3011) and a fixed crossbar (302). The connecting side plate (3011) is fixedly connected to one end of the fixed recess (201). The other end of the connecting side plate (3011) is fixedly connected to a movable vertical cylinder (301). A through groove (3012) is opened inside the connecting side plate (3011). Two sets of fixed crossbars (302) are fixedly connected in the through groove (3012). A spring (3021) is provided on the outside of the fixed crossbar (302).

4. The anesthesia mask fixation device adapted for lateral decubitus surgery according to claim 3, characterized in that: A movable slide rod (303) is provided between the fixed crossbars (302). Connecting ear plates (3031) are fixedly connected to the upper and lower sides of the movable slide rod (303). Movable sliding holes (3032) are provided on the connecting ear plates (3031). The movable slide rod (303) is slidably installed on the fixed crossbar (302) through the connecting ear plates (3031). A toggle plate (3033) is fixedly connected to one end of the movable slide rod (303).

5. The anesthesia mask fixation device adapted for lateral decubitus surgery according to claim 3, characterized in that: The inner side of the movable vertical cylinder (301) is provided with an adjusting vertical rod (304), and the side of the adjusting vertical rod (304) is provided with a locking hole (3041). At the same time, the other end of the movable slide rod (303) is inserted into the locking hole (3041).

6. The anesthesia mask fixation device adapted for lateral decubitus surgery according to claim 5, characterized in that: The bottom of the adjusting vertical rod (304) is provided with an adapter component (4). The adapter component (4) includes a fixed base block (401), a connecting base plate (4011), and an extension support plate (4012). The fixed base block (401) is fixedly connected to the bottom of the adjusting vertical rod (304). The bottom of the fixed base block (401) is fixedly connected to the connecting base plate (4011), and the top side of the fixed base block (401) is fixedly connected to the extension support plate (4012).

7. The anesthesia mask fixation device adapted for lateral decubitus surgery according to claim 6, characterized in that: A threaded rod (402) is rotatably installed between the extension support plate (4012) and the connecting base plate (4011). The threaded rod (402) has an external thread structure, and an operating handle (4021) is fixedly connected to one end of the threaded rod (402).

8. The anesthesia mask fixation device adapted for lateral decubitus surgery according to claim 6, characterized in that: A movable belt plate (403) is provided between the extension support plate (4012) and the connecting base plate (4011). A second screw hole (4031) is provided in the middle of the movable belt plate (403). The second screw hole (4031) is engaged with the external thread of the threaded rod (402). A through groove (4033) is provided in the middle of the fixed base block (401). One side of the clamping convex plate (4032) passes through the through groove (4033) and is fixedly connected to the movable belt plate (403). At the same time, the connecting base plate (4011) and the clamping convex plate (4032) are clamped on the connecting base frame (1011).

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