Measuring tool for double-fold eyelid shaping operation

By designing a double eyelid measurement tool including positioning plate, connecting mechanism and marking components, the problem of unsatisfactory adjustment accuracy and inaccurate marking in double eyelid setting surgery is solved, and more accurate measurement and safe marking are achieved Operation to avoid postoperative asymmetry and eye damage.

CN222194992UActive Publication Date: 2024-12-20SHANGHAI WOXING MEDICAL TECH CO LTD
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Patent Information

Application Number
CN202323584363.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2023-12-26
Publication Date
2024-12-20
Estimated Expiration
2033-12-26

AI Technical Summary

Technical Problem

During double eyelid styling surgery, the adjustment accuracy of the existing measuring ruler is not ideal, resulting in the risk of asymmetry after double eyelid surgery.

Method used

A measurement tool including a positioning plate, a connecting mechanism and a scribing assembly is designed to achieve a stable connection between the positioning plate and the measuring plate through the connecting mechanism. The scribing assembly performs scribing operation under the adjustment of the limit plate and when not in use Storage to avoid eye damage.

Benefits of technology

The adjustment accuracy of the measurement board and the accuracy of the scribe are improved, the risk of postoperative asymmetry is avoided, and the safety during the measurement process is ensured.

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Abstract

The utility model provides a measuring tool for a double-fold eyelid shaping operation. The measuring tool for the double-fold eyelid shaping operation comprises a positioning plate, a connecting plate is fixedly connected to the bottom side of the left end of the positioning plate, a measuring plate is arranged on the bottom side of the left end of the positioning plate, and an arc-shaped dial is fixedly installed on the side surface of the right end of the positioning plate; the connecting plate is connected with the fixing plate through the connecting mechanism, the fixing plate is fixedly connected with the measuring plate, and the connecting mechanism is used for rotationally connecting the positioning plate and the measuring plate; a limiting plate is installed at the right end of the measuring plate, and the lineation assembly used for shaping operation lineation is installed on the surface of the right end of the limiting plate. Through the arranged scribing assembly, measurement and scribing are integrated, the scribing accuracy is guaranteed, in the using process, the scribing assembly achieves the scribing operation of the double-fold eyelid surgery, and in the non-using process, the scribing assembly is in the storage state, and the scribing assembly does not affect the measurement operation of the measuring plate.
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Description

Technical Field

[0001] The utility model relates to a measuring tool for double-eyelid shaping surgery. Background Art

[0002] Double eyelids refer to a shallow groove on the upper eyelid skin above the eyelid margin. When the eyes are opened, the skin below the groove moves up, while the skin above the groove relaxes and hangs down at the eyelid groove. To form a pair of beautiful double eyelids, one must consider factors such as the shape and width of the double eyelids, the swelling of the upper eyelid, the width of the palpebral fissure, the curvature of the eyelid margin, the ratio between the height and width of the eyes, and the distance between the eyebrows and eyes.

[0003] Currently, in the use of measuring rulers in double eyelid shaping surgery, the adjustment accuracy of the measuring ruler is not ideal, and doctors often draw lines on the patient's eyelids after measuring with the measuring ruler, which can easily cause the risk of asymmetry after double eyelid surgery. Utility Model Content

[0004] The utility model provides a measuring tool for double eyelid shaping surgery to solve the technical problems that, in the current use of a measuring ruler in double eyelid shaping surgery, the adjustment accuracy of the measuring ruler is not ideal, and doctors often draw lines on the patient's eyelids after measuring with the measuring ruler, which easily causes the risk of asymmetry after double eyelid surgery.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides a measuring tool for double eyelid shaping surgery, and the measuring tool for double eyelid shaping surgery comprises:

[0007] A positioning plate, wherein a connecting plate is fixedly connected to the bottom side of the left end of the positioning plate, a measuring plate is arranged on the bottom side of the left end of the positioning plate, and an arc-shaped scale plate is fixedly installed on the side surface of the right end of the positioning plate;

[0008] A connecting mechanism, wherein the connecting plate is connected to the fixing plate via the connecting mechanism, the fixing plate is fixedly connected to the measuring plate, and the connecting mechanism is used for rotational connection between the positioning plate and the measuring plate;

[0009] A marking assembly, a limit plate is installed on the right end of the measuring plate, and a marking assembly for marking lines for shaping surgery is installed on the right end surface of the limit plate. When in use, the marking assembly realizes the marking operation of double-eyelid surgery. When not in use, the marking assembly is in a storage state. The marking assembly does not affect the measuring operation of the measuring plate, thereby avoiding the patient's eyes from being injured during the measurement process.

[0010] In the present technical solution, the fixing plate and the connecting plate are fixed by a connecting mechanism to ensure the stable connection between the positioning plate and the measuring plate, and to facilitate the adjustment between the positioning plate and the measuring plate. During the measurement, the marking assembly is set and the marking assembly is adjusted by the limit plate, and the limit plate drives the marking assembly to move. During use, the marking assembly realizes the marking operation of the double-eyelid surgery. When not in use, the marking assembly is in a storage state, and the marking assembly does not affect the measuring operation of the measuring plate, thereby avoiding the situation where the patient's eyes are injured during the measurement process, and realizing the measurement operation of the double-eyelid shaping surgery.

[0011] There are two fixing plates, a connecting plate is arranged between the two fixing plates, and the connecting plate is rotatably fitted with the fixing plates.

[0012] In this technical solution, the connection plate is arranged between the fixed plates to ensure the stability of the connection between the fixed plates and the connection plates.

[0013] The connecting mechanism includes a T-shaped rod, a torsion spring, and a locking nut. The end of the T-shaped rod slides through the fixed plate and the connecting plate. The top side of the fixed plate is provided with a torsion spring, and the end of the T-shaped rod is threadedly sleeved with a locking nut.

[0014] In this technical solution, the end of the T-rod passes through the fixed plate and the connecting plate, and the T-rod is fixed by a locking nut to ensure stable installation of the torsion spring and facilitate workers to disassemble the torsion spring.

[0015] The side surfaces of the two fixing plates are both provided with torsion springs, one end of the torsion spring is fixedly connected to the positioning plate, and the other end of the torsion spring is fixedly connected to the surface of the measuring plate.

[0016] In the present technical solution, the torsion spring is arranged on two opposite sides of the fixed plate. During installation, the torsion spring is fixedly connected to the surface of one side of the positioning plate, and the other end of the torsion spring is fixed to the measuring plate. Through the setting of the torsion spring, an elastic connection between the positioning plate and the measuring plate is achieved, thereby ensuring the stable use of the torsion spring.

[0017] A gasket is arranged between the locking nut and the torsion spring, and the inner wall of the top end of the T-shaped rod is fitted with the top end of the torsion spring through the gasket.

[0018] A pointer is fixedly mounted on the right end of the measuring plate, the pointer is fitted with the surface of the arc-shaped scale plate, and the other side of the arc-shaped scale plate is fitted with the limit plate.

[0019] In the technical solution, the measuring plate is moved and adjusted, and the cooperation between the pointer and the arc-shaped dial facilitates angle measurement to meet the use requirements.

[0020] The adjustment assembly includes a threaded column and an adjustment nut. The side surface of the measuring plate is penetrated by a threaded column, the bottom end of the threaded column is threadedly sleeved with an adjustment nut, and the other end of the threaded column is connected to the side surface of the positioning plate.

[0021] In the technical solution, during use, the adjusting nut is rotated and moved along the threaded column, and the measuring plate is pushed to move by the adjusting nut. The torsion spring is set to facilitate stability of the measuring plate during adjustment.

[0022] The marking assembly includes a connecting tube, an adjusting bolt, and a marking pen. The connecting tube is fixedly mounted on the surface of a limiting plate. The front surface of the connecting tube is threadedly connected with an adjusting bolt, and the adjusting bolt is used to adjust the marking pen in the connecting tube to be moved out for use and moved in for storage.

[0023] In the technical solution, when in use, the adjusting bolt is rotated, the adjusting bolt moves along the inner cavity of the connecting tube, the adjusting bolt pushes the marking pen set at the end to move, and the marking pen is moved out of the connecting tube, so that the marking pen can be easily moved. When not in use, the adjusting bolt moves along the connecting tube, so that the marking pen can be adjusted into the connecting tube, so that the marking pen can be easily stored. The marking assembly is in a stored state, and the marking assembly does not affect the measuring operation of the measuring plate, so as to avoid the patient's eyes being injured during the measurement process, and realize the measurement operation of the double eyelid shaping surgery.

[0024] The end of the adjusting bolt passes through the top side surface of the connecting tube, and a rotating seat is fixedly mounted on the end of the adjusting bolt.

[0025] In the technical solution, a rotating seat is fixedly installed at the end of the adjusting bolt. When the adjusting bolt is adjusted downward, the adjusting bolt pushes the rotating seat to move, thereby facilitating the movement and adjustment of the rotating seat.

[0026] The marking assembly also includes an adjusting plate, a spring and a threaded barrel. The adjusting plate is slidably connected to the inner cavity of the connecting barrel. A marking pen is installed on the bottom side of the adjusting plate. A spring is sleeved on the surface of the marking pen. The bottom side of the adjusting plate is elastically connected to the threaded barrel through the spring. The threaded barrel is threadedly connected to the bottom end of the connecting barrel. The top end of the spring fits with the surface of one side of the adjusting plate, and the other end of the spring fits with one end of the threaded barrel.

[0027] In the present technical scheme, an adjusting plate is arranged on the bottom side of a rotating seat, a spring is arranged on the bottom side of the adjusting plate, a threaded tube is arranged on the bottom end of the spring and is threadedly connected to the bottom end of a connecting tube, and by disassembling the threaded tube, the spring can be easily disassembled, which is convenient for replacing the spring after being damaged after long-term use, and during use, the rotating seat adjusts the position of the adjusting plate, and moves the marking pen installed on the bottom side through the adjusting plate, so that the marking pen can be moved out for marking, and when not in use, the spring pushes the adjusting plate to move under the elastic action of the spring, and the adjusting plate drives the marking pen to move into the inner cavity of the connecting tube, so that the marking pen can be stored conveniently, and the marking assembly is in a stored state, and the marking assembly does not affect the measuring operation of the measuring plate, so as to avoid the patient's eye being injured during the measurement process, and realize the measurement operation of the double eyelid shaping surgery.

[0028] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0029] The positive and progressive effects of the utility model are:

[0030] The above-mentioned measuring tool for double-eyelid shaping surgery is convenient for connecting the positioning plate and the measuring plate through a connecting mechanism. With the cooperation of the adjusting component, the position of the measuring plate is adjusted to ensure that the measuring plate is stably adjusted during use. During measurement, the measuring and marking are integrated through the provided marking component to ensure the accuracy of marking. During use, the marking component realizes the marking operation of the double-eyelid shaping surgery. When not in use, the marking component is in a storage state. The marking component does not affect the measuring operation of the measuring plate, thereby avoiding the situation where the patient's eyes are injured during the measurement process, thereby realizing the measurement operation of the double-eyelid shaping surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The utility model is a three-dimensional structural schematic diagram of a measuring tool for double-eyelid shaping surgery.

[0032] Figure 2 The utility model is a measuring tool for double eyelid shaping surgery Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0033] Figure 3 This is a schematic diagram of the structure in which the positioning plate and the measuring plate of the double eyelid shaping surgery are connected through a connecting mechanism according to the utility model.

[0034] Figure 4 It is a schematic diagram of the connection structure of the marking components for double eyelid shaping surgery of the present invention.

[0035] Description of Reference Numerals

[0036] 1. Positioning plate; 11. Connecting plate; 2. Measuring plate; 21. Fixing plate; 22. Limiting plate; 23. Pointer; 3. Adjusting assembly; 31. Threaded column; 32. Adjusting nut; 4. Arc-shaped dial; 5. Connecting mechanism; 51. T-bar; 52. Washer; 53. Torsion spring; 54. Locking nut; 6. Marking assembly; 61. Connecting cylinder; 62. Adjusting bolt; 63. Rotating seat; 64. Adjusting plate; 65. Spring; 66. Marking pen; 67. Threaded cylinder. DETAILED DESCRIPTION

[0037] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0038] like Figure 1-4 As shown, the measuring tools for the double eyelid shaping surgery include:

[0039] A positioning plate 1, a connecting plate 11 is fixedly connected to the bottom side of the left end of the positioning plate 1, a measuring plate 2 is arranged on the bottom side of the left end of the positioning plate 1, and an arc-shaped scale plate 4 is fixedly installed on the right end side surface of the positioning plate 1;

[0040] A connecting mechanism 5, wherein the connecting plate 11 is connected to the fixing plate 21 via the connecting mechanism 5, and the fixing plate 21 is fixedly connected to the measuring plate 2, and the connecting mechanism 5 is used for the rotational connection between the positioning plate 1 and the measuring plate 2;

[0041] A marking component 6 is installed at the right end of the measuring plate 2, and a marking component 6 for marking the lines of the shaping operation is installed on the right end surface of the limiting plate 22. When in use, the marking component 6 realizes the marking operation of the double eyelid surgery. When not in use, the marking component 6 is in a storage state. The marking component 6 does not affect the measuring operation of the measuring plate 2, thereby avoiding the patient's eyes from being injured during the measurement process.

[0042] The fixing plate 21 and the connecting plate 11 are fixed by the connecting mechanism 5 to ensure the stable connection between the positioning plate 1 and the measuring plate 2, and to facilitate the adjustment between the positioning plate 1 and the measuring plate 2. During the measurement, the marking assembly 6 is set and the marking assembly 6 is adjusted by the limiting plate 22, and the limiting plate 22 drives the marking assembly 6 to move. During use, the marking assembly 6 realizes the marking operation of the double-eyelid surgery. When not in use, the marking assembly 6 is in a storage state, and the marking assembly 6 does not affect the measuring operation of the measuring plate 2, so as to avoid the patient's eyes being injured during the measurement process, and realize the measurement operation of the double-eyelid shaping surgery.

[0043] There are two fixing plates 21 , and a connecting plate 11 is disposed between the two fixing plates 21 . The connecting plate 11 is rotatably fitted to the fixing plates 21 .

[0044] In the present technical solution, the connection plate 11 is arranged between the fixing plates 21 to ensure a stable connection between the fixing plates 21 and the connection plate 11 .

[0045] The connecting mechanism 5 includes a T-shaped rod 51, a torsion spring 53, and a locking nut 54. The end of the T-shaped rod 51 slides through the fixed plate 21 and the connecting plate 11. The top side of the fixed plate 21 is provided with a torsion spring 53. The end of the T-shaped rod 51 is threadedly sleeved with a locking nut 54.

[0046] In this technical solution, the end of the T-bar 51 passes through the fixing plate 21 and the connecting plate 11, and the T-bar 51 is fixed by the locking nut 54 to ensure the stable installation of the torsion spring 53 and facilitate the workers to disassemble the torsion spring 53.

[0047] A torsion spring 53 is disposed on the side surfaces of the two fixing plates 21 . One end of the torsion spring 53 is fixedly connected to the positioning plate 1 , and the other end of the torsion spring 53 is fixedly connected to the surface of the measuring plate 2 .

[0048] The torsion spring 53 is arranged on two opposite sides of the fixing plate 21. During installation, the torsion spring 53 is fixedly connected to the surface of one side of the positioning plate 1, and the other end of the torsion spring 53 is fixed to the measuring plate 2. By setting the torsion spring 53, an elastic connection between the positioning plate 1 and the measuring plate 2 is achieved, thereby ensuring the stable use of the torsion spring 53.

[0049] A gasket 52 is provided between the locking nut 54 and the torsion spring 53 , and the inner wall of the top end of the T-shaped rod 51 is fitted with the top end of the torsion spring 53 through the gasket 52 .

[0050] A pointer 23 is fixedly mounted on the right end of the measuring plate 2 , and the pointer 23 is fitted with the surface of the arc-shaped scale plate 4 , and the other side of the arc-shaped scale plate 4 is fitted with the limit plate 22 .

[0051] During the movement and adjustment of the measuring plate 2, the cooperation between the pointer 23 and the arc-shaped scale plate 4 facilitates angle measurement to meet the use requirements.

[0052] The adjusting assembly 3 includes a threaded column 31 and an adjusting nut 32 . The side surface of the measuring plate 2 is penetrated by the threaded column 31 . The bottom end of the threaded column 31 is threadedly sleeved with the adjusting nut 32 . The other end of the threaded column 31 is connected to the side surface of the positioning plate 1 .

[0053] During use, the adjusting nut 32 is rotated and moved along the threaded column 31 , and the measuring plate 2 is pushed to move by the adjusting nut 32 . The torsion spring 53 is set to facilitate the stability of the measuring plate 2 during the adjustment process.

[0054] The marking assembly 6 includes a connecting tube 61, an adjusting bolt 62, and a marking pen 66. The connecting tube 61 is fixedly mounted on the surface of the limiting plate 22. The front surface of the connecting tube 61 is threadedly connected with the adjusting bolt 62. The adjusting bolt 62 is used to adjust the marking pen 66 in the connecting tube 61 to be moved out for use or moved in for storage.

[0055] When in use, the adjusting bolt 62 is rotated, and the adjusting bolt 62 moves along the inner cavity of the connecting tube 61. The adjusting bolt 62 pushes the marking pen 66 set at the end to move, and the marking pen 66 is moved out of the connecting tube 61, so that the marking pen 66 can be marked while moving. When not in use, the adjusting bolt 62 moves along the connecting tube 61, so that the marking pen 66 is adjusted to move into the connecting tube 61, so that the marking pen 66 can be stored. The marking assembly 6 is in the storage state, and the marking assembly 6 does not affect the measuring operation of the measuring plate 2, so as to avoid the patient's eyes being injured during the measurement process, and realize the measurement operation of the double eyelid shaping surgery.

[0056] The end of the adjusting bolt 62 passes through the top surface of the connecting tube 61 , and a rotating seat 63 is fixedly mounted on the end of the adjusting bolt 62 .

[0057] A rotating seat 63 is fixedly mounted on the end of the adjusting bolt 62 . When the adjusting bolt 62 is adjusted, the adjusting bolt 62 pushes the rotating seat 63 to move, so that the rotating seat 63 can be moved and adjusted easily.

[0058] The marking assembly 6 also includes an adjusting plate 64, a spring 65 and a threaded barrel 67. The adjusting plate 64 is slidably connected to the inner cavity of the connecting barrel 61. A marking pen 66 is installed on the bottom side of the adjusting plate 64. A spring 65 is sleeved on the surface of the marking pen 66. The bottom side of the adjusting plate 64 is elastically connected to the threaded barrel 67 through the spring 65. The threaded barrel 67 is threadedly connected to the bottom end of the connecting barrel 61. The top end of the spring 65 is in contact with the surface of one side of the adjusting plate 64, and the other end of the spring 65 is in contact with one end of the threaded barrel 67.

[0059] The adjusting plate 64 is arranged at the bottom side of the rotating seat 63, and a spring 65 is arranged at the bottom side of the adjusting plate 64. The bottom end of the spring 65 is arranged with a threaded tube 67 which is threadedly connected to the bottom end of the connecting tube 61. By disassembling the threaded tube 67, the spring 65 can be easily disassembled, which is convenient for the situation that the spring 65 is damaged after long-term use and is not convenient to replace. In use, the rotating seat 63 adjusts the position of the adjusting plate 64, and moves the marking pen 66 installed on the bottom side through the adjusting plate 64, so that the marking pen 66 is moved out for marking. When not in use, the spring 65 pushes the adjusting plate 64 to move under the elastic action of the spring 65, and the adjusting plate 64 drives the marking pen 66 to move into the inner cavity of the connecting tube 61, so that the marking pen 66 is stored conveniently. The marking assembly 6 is in the storage state, and the marking assembly 6 does not affect the measuring operation of the measuring plate 2, so as to avoid the situation that the patient's eyes are injured during the measuring process, and the measuring operation of the double eyelid shaping surgery is realized.

[0060] The utility model is not limited to the above-mentioned embodiments. Any changes in shape or structure are within the protection scope of the utility model. The protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the utility model, but these changes and modifications are within the protection scope of the utility model.

Claims

1. A measuring tool for double eyelid shaping surgery, characterized in that: The measuring tools for the double eyelid shaping surgery include: A positioning plate (1), wherein a connecting plate (11) is fixedly connected to the bottom side of the left end of the positioning plate (1), a measuring plate (2) is arranged on the bottom side of the left end of the positioning plate (1), and an arc-shaped scale plate (4) is fixedly mounted on the side surface of the right end of the positioning plate (1); A connecting mechanism (5), wherein the connecting plate (11) is connected to the fixing plate (21) via the connecting mechanism (5), the fixing plate (21) is fixedly connected to the measuring plate (2), and the connecting mechanism (5) is used for rotationally connecting the positioning plate (1) and the measuring plate (2); A marking assembly (6), wherein a limit plate (22) is installed at the right end of the measuring plate (2), and a marking assembly (6) for marking lines for shaping surgery is installed on the right end surface of the limit plate (22); when in use, the marking assembly (6) implements a marking operation for double-eyelid surgery; when not in use, the marking assembly (6) is in a stored state, and the marking assembly (6) does not affect the measuring operation of the measuring plate (2), thereby preventing the patient's eyes from being injured during the measurement process; An adjustment component (3), the adjustment component (3) comprising a threaded column (31) and an adjustment nut (32), the threaded column (31) passing through the side surface of the measuring plate (2), the adjustment nut (32) being threadedly sleeved at the bottom end of the threaded column (31), and the other end of the threaded column (31) being connected to the side surface of the positioning plate (1).

2. The measuring tool for double eyelid shaping surgery according to claim 1, characterized in that: There are two fixing plates (21), a connecting plate (11) is provided between the two fixing plates (21), and the connecting plate (11) is rotatably fitted to the fixing plates (21).

3. The measuring tool for double eyelid shaping surgery according to claim 1, characterized in that: The connecting mechanism (5) comprises a T-shaped rod (51), a torsion spring (53), and a locking nut (54); the end of the T-shaped rod (51) slides through the fixing plate (21) and the connecting plate (11); the top side of the fixing plate (21) is provided with a torsion spring (53); and the end of the T-shaped rod (51) is threadedly sleeved with the locking nut (54).

4. The measuring tool for double eyelid shaping surgery according to claim 1, characterized in that: A torsion spring (53) is provided on the side surfaces of the two fixing plates (21); one end of the torsion spring (53) is fixedly connected to the positioning plate (1), and the other end of the torsion spring (53) is fixedly connected to the surface of the measuring plate (2).

5. The measuring tool for double eyelid shaping surgery according to claim 3, characterized in that: A gasket (52) is provided between the locking nut (54) and the torsion spring (53), and the inner wall of the top end of the T-shaped rod (51) is fitted with the top end of the torsion spring (53) via the gasket (52).

6. The measuring tool for double eyelid shaping surgery according to claim 1, characterized in that: A pointer (23) is fixedly mounted on the right end of the measuring plate (2), the pointer (23) is fitted with the surface of the arc-shaped scale plate (4), and the other side of the arc-shaped scale plate (4) is fitted with the limit plate (22).

7. The measuring tool for double eyelid shaping surgery according to claim 1, characterized in that: The marking assembly (6) comprises a connecting tube (61), an adjusting bolt (62), and a marking pen (66); the connecting tube (61) is fixedly mounted on the surface of the limiting plate (22); the front surface of the connecting tube (61) is threadedly connected with the adjusting bolt (62); the adjusting bolt (62) is used to adjust the marking pen (66) in the connecting tube (61) to be moved out for use or moved in for storage.

8. The measuring tool for double eyelid shaping surgery according to claim 7, characterized in that: The end of the adjusting bolt (62) passes through the top surface of the connecting tube (61), and a rotating seat (63) is fixedly mounted on the end of the adjusting bolt (62).

9. The measuring tool for double eyelid shaping surgery according to claim 1, characterized in that: The marking assembly (6) further comprises an adjusting plate (64), a spring (65) and a threaded barrel (67); the adjusting plate (64) is slidably connected to the inner cavity of the connecting barrel (61); a marking pen (66) is mounted on the bottom side of the adjusting plate (64); a spring (65) is sleeved on the surface of the marking pen (66); the bottom side of the adjusting plate (64) is elastically connected to the threaded barrel (67) via the spring (65); the threaded barrel (67) is threadedly connected to the bottom end of the connecting barrel (61); the top end of the spring (65) is in contact with the surface of one side of the adjusting plate (64); and the other end of the spring (65) is in contact with one end of the threaded barrel (67).