Positioning ruler for surgical operation

Abstract

The utility model provides a set rule for surgical operation, which comprises a first scale and a second scale, the first scale and the second scale are perpendicular to each other, and the middle part of the first scale is thickened; a through strip-shaped hole is formed in the first ruler in the length direction of the first ruler, a strip-shaped block is arranged in the strip-shaped hole in a sliding mode and fixedly connected with the second ruler, and a limiting piece is arranged on the strip-shaped block and used for limiting the position of the strip-shaped block in the strip-shaped hole. A mounting hole is formed in the side wall of the strip-shaped block in the length direction of the second ruler, the limiting piece is inserted into the mounting hole in a sliding mode, and a limiting groove for the limiting piece to be inserted is formed in the hole wall of the strip-shaped hole. The diseased region is accurately measured and calculated in the transverse direction and the longitudinal direction, measurement in the two directions is completed at a time, measurement errors can be reduced, and the accuracy of preoperative positioning is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a positioning ruler for surgical operations. Background Art

[0002] The contents of this section merely provide background information related to the present invention and may not constitute prior art.

[0003] In surgical operations, especially neurosurgery craniotomy, the lesion site needs to be accurately located based on the patient's CT, MR and other examination results combined with the patient's body surface landmarks before the operation, and then the surgical incision is designed according to the located lesion site for surgery. When the positioning deviation is large, a larger incision is required to expose more surgical fields to find the lesion, which brings greater trauma to the patient. If the positioning is accurate, the lesion can be treated through a smaller surgical incision, thereby achieving the purpose of "precision medicine" and "minimally invasive medicine". Therefore, accurate preoperative positioning is crucial for surgical operations.

[0004] Currently, neuronavigation, stereotactic or intraoperative ultrasound are used to locate the lesion site, but these devices are expensive and require specialized technicians to operate the equipment. The operation also takes a long time, so the promotion and application of these devices and technologies in clinical practice is greatly limited.

[0005] At present, ordinary measuring rulers are often used in clinical practice to measure head surface landmarks, combined with CT and MR imaging examinations to locate the lesion site and design surgical incisions. When using ordinary measuring rulers, it is often necessary to measure the positioning reference points up and down, front and back, and sometimes even at special angles. Therefore, it often takes a lot of time before surgery, and multiple measurements with reference to different baselines also increase errors and affect accuracy. Utility Model Content

[0006] In order to solve the above technical problems, the purpose of the utility model is to provide a positioning ruler for surgical operations, comprising a first ruler and a second ruler, the first ruler and the second ruler being perpendicular to each other, and the middle part of the first ruler being thickened; a through strip hole is provided on the first ruler along the length direction of the first ruler, a strip block is slidably provided in the strip hole, the strip block is fixedly connected to the second ruler, a limit piece is provided on the strip block, the limit piece is used to limit the position of the strip block in the strip hole, a mounting hole is provided on the side wall of the strip block along the length direction of the second ruler, the limit piece is slidably inserted in the mounting hole, and a limit groove for inserting the limit piece is provided on the hole wall of the strip hole. The utility model can quickly locate the lesion site through the first ruler and the second ruler being perpendicular to each other, accurately measure the lesion site in the horizontal and vertical directions, complete the measurement in the two directions at one time, reduce the measurement error, and improve the accuracy of preoperative positioning.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] A positioning ruler for surgical operation comprises a first ruler and a second ruler, wherein the first ruler and the second ruler are perpendicular to each other, a through strip hole is provided on the first ruler along the length direction of the first ruler, a strip block is slidably arranged in the strip hole, the strip block is fixedly connected to the second ruler, a limiting piece is arranged on the strip block, and the limiting piece is used to limit the position of the strip block in the strip hole.

[0009] In some possible embodiments, the limit member is configured as a pin, and a mounting hole is provided on the side wall of the strip block along the length direction of the second scale. The limit member is slidably inserted into the mounting hole, and a limit groove for inserting the limit member is provided on the hole wall of the strip hole. A plurality of limit grooves are provided along the length direction of the strip hole. A first elastic member is provided in the mounting hole, and the first elastic member is used to drive the limit member to move in a direction away from the mounting hole. A driving member is provided on the strip block, and the driving member is used to drive the limit member to move in the mounting hole.

[0010] Furthermore, the end of the limiting member is configured as a pointed structure, and the limiting groove is configured as a groove structure matched with the limiting member.

[0011] In some possible embodiments, the driving member is configured as a paddle, and a connecting hole is opened on the top wall of the strip block along the length direction of the second scale, the connecting hole is connected to the mounting hole, and a connecting block is slidably arranged in the connecting hole, one end of the connecting block is fixedly connected to the limit member, and the other end is fixedly connected to the bottom of the driving member.

[0012] In some possible embodiments, a guide block is fixedly arranged on the side of the strip block away from the limiting member along the length direction of the strip block, and a guide groove adapted to the guide block is opened on the side wall of the strip hole along the length direction of the strip hole, and the guide block is slidably arranged in the guide groove.

[0013] In some possible embodiments, a semicircular meter is rotatably provided at the end of the first ruler, and a pointer is provided at one end of the first ruler close to the semicircular meter.

[0014] In some possible embodiments, a through hole is provided in the horizontal portion of the semicircular instrument, a mounting shaft is slidably inserted in the through hole, a through hole is provided on the first ruler for the mounting shaft to pass through, an abutment plate is fixedly provided at one end of the mounting shaft, the top of the abutment plate is used to abut against the bottom of the semicircular instrument, a fastening sleeve is threadedly provided at the end of the mounting shaft away from the abutment plate, and the bottom of the fastening sleeve is used to abut against the top of the first ruler.

[0015] In some possible embodiments, a clamping plate is slidably sleeved on the mounting shaft along the length direction of the mounting shaft, one side of the clamping plate is used to abut against the top of the first scale, and the other side is used to abut against the bottom of the fastening sleeve, and a second elastic member is provided on the mounting shaft, and the second elastic member is used to drive the clamping plate to move toward the first scale.

[0016] In some possible embodiments, a slide groove is opened on the installation shaft along the length direction of the installation shaft, a slider is slidably arranged in the slide groove, the slider is fixedly connected to the inner wall of the clamping plate, and the second elastic member is arranged in the slide groove, and the second elastic member is used to drive the slider to move toward the first scale.

[0017] In some possible embodiments, the second elastic member is configured as a tension spring, one end of the second elastic member abuts against the sliding block, and the other end abuts against the bottom wall of the sliding groove.

[0018] Furthermore, the second scale is located below the first scale, and the middle part of the first scale is thickened; two slide grooves are symmetrically opened on the installation axis, and a slider and a second elastic member are slidably arranged in each slide groove; the slider protrudes from the inner periphery of the clamping plate and is formed integrally with the clamping plate.

[0019] Furthermore, a plurality of limit grooves provided on the side wall of the strip hole form a serrated structure along the length direction of the strip hole; the first elastic member is provided as a compression spring, one end of the first elastic member abuts against the tail of the limit member, and the other end abuts against the inner wall of the mounting hole; the guide groove is provided as a T-shaped groove or a dovetail groove, and the guide block is provided as a T-shaped block or a dovetail block adapted to the guide groove.

[0020] In some possible embodiments, a rotating shaft is fixedly installed at the bottom of the bar block, a rotating groove for rotationally connecting the rotating shaft is opened at the top of the second scale, and the bar block is rotationally connected to the second scale via the rotating shaft;

[0021] Furthermore, a plurality of angle marking lines with the same starting point are engraved on the upper surface of the second scale, so that the deflection angle of the angle formed by the deflection between the second scale and the first scale can be measured.

[0022] Preferably, linear scale lines are engraved along the length direction on the straight part of the semicircular instrument so that the linear distance can be measured; and radial scale lines are engraved along the circumferential direction on the circumference of the semicircular instrument so that the angle can be measured.

[0023] In summary, the technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0024] 1. In actual use, the patient's lesion site can be quickly located by the mutually perpendicular first and second rulers, and the position of the lesion site can be accurately measured in the horizontal and vertical directions, which reduces the number of measurements, reduces errors, and improves measurement accuracy. At the same time, according to different surgical situations, the position of the second ruler on the first ruler can be flexibly adjusted, further improving the scope of application of the device;

[0025] 2. The limiting member is driven by the driving member to move in a direction away from the limiting groove, so that the end of the limiting member is separated from the limiting groove. At this time, the strip block can be driven to move in the strip hole. With the movement of the strip block, the first scale can be driven to move on the second scale. After the movement is completed, the limiting member is inserted into the limiting groove under the action of the first elastic member, so that the position of the second scale on the first scale can be limited. The operation is simple and convenient, and has good practicality.

[0026] 3. When the second scale is driven to move on the first scale, the guide block slides in the guide groove as the strip block moves, and the side wall of the guide block always abuts against the inner wall of the guide groove, thereby guiding the movement of the strip block in the strip groove to a certain extent, thereby improving the accuracy of the device during use;

[0027] 4. When locating the lesion, the semicircular instrument can also accurately measure the angle, so as to further ensure the accuracy of the measurement of the lesion. The measurement of some special angles can effectively reduce the measurement time, thereby reducing the time spent before surgery, reducing costs, and improving the measurement accuracy and accuracy of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0029] Figure 2 It is a structural schematic diagram of the position limiting member of the utility model;

[0030] Figure 3 for Figure 2 A magnified view of part A in FIG.

[0031] Figure 4 This is a schematic structural diagram of the installation shaft of an embodiment of the utility model;

[0032] Figure 5 This is a schematic structural diagram of a tightening sheet according to an embodiment of the utility model;

[0033] Figure 6 is a cross-sectional view of a second scale of an embodiment of the utility model;

[0034] Figure 7Another structural schematic diagram of the semicircular instrument of the utility model.

[0035] Icons: 1. First scale; 2. Second scale; 3. Strip hole; 31. Strip block; 4. Limiting member; 41. Mounting hole; 42. Limiting groove; 43. First elastic member; 44. Driving member; 45. Connecting hole; 46. Connecting block; 47. Anti-slip pattern; 48. Guide block; 49. Guide groove; 5. Semicircular instrument; 51. Pointer; 52. Through hole; 53. Mounting shaft; 54. Through hole; 55. Abutment sheet; 56. Fastening sleeve; 57. Abutment sheet; 58. Second elastic member; 6. Slide groove; 61. Sliding block; 7. Rotating shaft; 71. Rotating groove; 8. Angle marking line. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] The following reference Figures 1 to 5 The utility model is described in further detail.

[0038] Reference Figure 1 , 2 A positioning ruler for surgical operation includes a first ruler 1 and a second ruler 2, the first ruler 1 and the second ruler 2 are perpendicular to each other, the second ruler 2 is located below the first ruler 1, the middle part of the first ruler 1 is thickened, a through strip hole 3 is opened on the first ruler 1 along the length direction of the first ruler 1, a strip block 31 is slidably arranged in the strip hole 3, the strip block 31 is fixedly connected to the second ruler 2, a limiting member 4 is arranged on the strip block 31, and the limiting member 4 is used to limit the position of the strip block 31 in the strip hole 3.

[0039] Reference Figure 2 , 3 The limiting member 4 is set as a latch, and a mounting hole 41 is provided on the side wall of the strip block 31 along the length direction of the second scale 2. The limiting member 4 is slidably inserted into the mounting hole 41, and a limiting groove 42 for inserting the limiting member 4 is provided on the side wall of the cavity of the strip hole 3. A plurality of limiting grooves 42 are provided along the length direction of the strip hole 3, and the plurality of limiting grooves 42 provided on the side wall of the strip hole 3 form a serrated structure along the length direction of the strip hole 3, such as Figure 2 and Figure 3A first elastic member 43 is arranged in the mounting hole 41, and the first elastic member 43 is used to drive the limiting member 4 to move in the direction away from the mounting hole 41. A driving member 44 is arranged on the strip block 31, and the driving member 44 is used to drive the limiting member 4 to move in the mounting hole 41. The end of the limiting member 4 is arranged as a pointed head, and the tip of the limiting member 4 is a protruding "A"-shaped pointed head structure. The shape of the limiting groove 42 is adapted to the limiting member 4, and each limiting groove 42 is a concave "V"-shaped structure, so that the limiting member 4 can be more conveniently inserted into the limiting groove 42.

[0040] As an implementation mode of the present utility model, refer to Figure 3 The first elastic member 43 is configured as a compression spring, one end of the first elastic member 43 abuts against the tail of the limiting member 4 , and the other end abuts against the inner wall of the mounting hole 41 .

[0041] Among them, refer to Figure 3 The driving member 44 is configured as a paddle, and a connecting hole 45 is opened on the top wall of the strip block 31 along the length direction of the second scale 2. The connecting hole 45 is connected to the mounting hole 41, and a connecting block 46 is slidably arranged in the connecting hole 45. One end of the connecting block 46 is fixedly connected to the limit member 4, and the other end is fixedly connected to the bottom of the driving member 44.

[0042] Reference Figure 3 An anti-skid pattern 47 is provided on the side wall of the driving member 44. The anti-skid pattern 47 can increase the friction between the staff's hand and the driving member 44, thereby making it convenient for the staff to move the paddle.

[0043] Reference Figure 2 A guide block 48 is fixedly arranged along the length direction of the strip block 31 on the side of the strip block 31 away from the limiting member 4, and a guide groove 49 adapted to the guide block 48 is opened on the side wall of the strip hole 3 along the length direction of the strip hole 3, and the guide block 48 is slidably arranged in the guide groove 49.

[0044] As an implementation mode of the present utility model, refer to Figure 2 The guide groove 49 is provided as a T-shaped groove, and the guide block 48 is provided as a T-shaped block adapted to the guide groove 49 ; as another possible implementation manner of the utility model, the guide groove 49 can also be provided as a dovetail groove, and the guide block 48 is provided as a dovetail block adapted to the guide groove 49 .

[0045] When the bar block 31 moves in the bar hole 3, the guide block 48 moves in the guide groove 49, and the side wall of the guide block 48 is always in contact with the inner wall of the guide groove 49, which guides the movement of the bar block 31 and the second scale 2. At the same time, since the guide block 48 is set as a T-block, it can also effectively prevent the bar block 31 from detaching from the bar hole 3, thereby improving the operability of the device.

[0046] Reference Figure 1 , 4 A semicircular meter 5 is rotatably provided at the end of the first ruler 1 , and a pointer 51 is provided at one end of the first ruler 1 close to the semicircular meter 5 .

[0047] Reference Figure 4 , 5 A through hole 52 is provided in the horizontal part of the semicircular meter 5, and a mounting shaft 53 is slidably inserted in the through hole 52. A through hole 54 is provided on the first scale 1 for the mounting shaft 53 to pass through. A contact piece 55 is fixedly provided at one end of the mounting shaft 53, and the top of the contact piece 55 is used to contact with the bottom of the semicircular meter 5. A fastening sleeve 56 is threadedly sleeved on the end of the mounting shaft 53 away from the contact piece 55, and the bottom of the fastening sleeve 56 is used to contact with the top of the first scale 1.

[0048] Among them, refer to Figure 4 , 5 A clamping piece 57 is slidably sleeved on the mounting shaft 53 along the length direction of the mounting shaft 53. One side of the clamping piece 57 is used to abut against the top of the first scale 1, and the other side is used to abut against the bottom of the fastening sleeve 56. A second elastic member 58 is provided on the mounting shaft 53, and the second elastic member 58 is used to drive the clamping piece 57 to move toward the first scale 1.

[0049] During actual use, the clamping piece 57 moves toward the first scale 1 under the action of the second elastic member 58, so that the clamping piece 57 is in close contact with the first scale 1. Under the action of the second elastic member 58, the position of the semicircular meter 5 relative to the first scale 1 is fixed to a certain extent, thereby preventing the semicircular meter 5 from rotating freely on the first scale 1.

[0050] A slide groove 6 is provided on the installation shaft 53 along the length direction of the installation shaft 53, and a slider 61 is slidably provided in the slide groove 6. The slider 61 is fixedly connected to the inner wall of the clamping plate 57. A second elastic member 58 is provided in the slide groove 6. The second elastic member 58 is used to drive the slider 61 to move toward the first scale 1.

[0051] As an implementation mode of the present utility model, refer to Figure 4 , 5 The second elastic member 58 is configured as a tension spring, one end of the second elastic member 58 is fixedly abutted against the bottom of the slider 61 protruding from the inner periphery of the locking plate 57 , and the other end is fixedly abutted against the bottom wall of the slide groove 6 .

[0052] Among them, refer to Figure 4 , 5 Two slide grooves 6 are symmetrically provided on the mounting shaft 53 , and a slider 61 and a second elastic member 58 are slidably arranged in each slide groove 6 .

[0053] In addition, as an embodiment of the present invention, refer to Figure 6 A rotating shaft 7 is fixedly installed at the bottom of the bar block 31, and a rotating groove 71 for the rotating shaft 7 to be rotatably connected is opened at the top of the second scale 2. The bar block 31 is rotatably connected to the second scale 2 through the rotating shaft 7. In the subsequent actual use process, the second scale 2 can rotate relative to the first scale 1, and refer to Figure 6 The upper surface of the second scale 2 is engraved with a plurality of angle marking lines 8 having the same starting point, which can measure the deflection angle of the angle formed between the second scale 2 and the first scale 1 due to deflection.

[0054] Reference Figure 7 As another embodiment of the present invention, the linear part of the semicircular instrument 5 is uniformly engraved with linear scale lines along the length direction, so that the linear distance can be measured. Of course, radial scale lines are uniformly engraved along the circumference direction on the circumference of the semicircular instrument 5, so that the angle can be measured.

[0055] The implementation principle of a surgical positioning ruler proposed in the embodiment of the utility model is:

[0056] In actual use, the patient's lesion site can be quickly located by the mutually perpendicular first ruler 1 and second ruler 2, and the position of the lesion site can be accurately measured in both horizontal and vertical directions. The measurement in both directions can be completed at one time. Compared with the existing technology, the number of measurements is reduced, thereby reducing errors and improving measurement accuracy. At the same time, according to different surgical situations, the position of the second scale 2 on the first scale 1 can be flexibly adjusted, further improving the application scope of the device; the limiting member 4 is driven by the driving member 44 to move in the direction away from the limiting groove 42, so that the end of the limiting member 4 is separated from the limiting groove 42, and at this time, the strip block 31 can be driven to move in the strip hole 3, and with the movement of the strip block 31, the first scale 1 can be driven to move on the second scale 2. After the movement is completed, the limiting member 4 is inserted into the limiting groove 42 under the action of the first elastic member 43, and the position of the second scale 2 on the first scale 1 can be limited. The operation is simple and convenient, and has good practicality; when locating the lesion, the semicircular instrument 5 can also accurately measure the angle, so as to further ensure the accuracy of the measurement of the lesion. For the measurement of some special angles, the measurement time can be effectively reduced, thereby reducing the time spent before the operation, reducing the cost, and improving the measurement accuracy and the accuracy of the operation.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A positioning ruler for surgical operation, characterized in that: The invention comprises a first scale (1) and a second scale (2), wherein the first scale (1) and the second scale (2) are perpendicular to each other, a through strip hole (3) is provided on the first scale (1) along the length direction of the first scale (1), a strip block (31) is slidably arranged in the strip hole (3), the strip block (31) is fixedly connected to the second scale (2), and a limiting member (4) is arranged on the strip block (31), and the limiting member (4) is used to limit the position of the strip block (31) in the strip hole (3).

2. A surgical positioning ruler according to claim 1, characterized in that: The limiting member (4) is arranged as a latch pin. A mounting hole (41) is provided on the side wall of the strip block (31) along the length direction of the second scale (2). The limiting member (4) is slidably inserted into the mounting hole (41). A limiting groove (42) for inserting the limiting member (4) is provided on the hole wall of the strip hole (3). A plurality of limiting grooves (42) are provided along the length direction of the strip hole (3). A first elastic member (43) is arranged in the mounting hole (41). The first elastic member (43) is used to drive the limiting member (4) to move in a direction away from the mounting hole (41). A driving member (44) is arranged on the strip block (31). The driving member (44) is used to drive the limiting member (4) to move in the mounting hole (41). The end of the limiting member (4) is arranged as a pointed structure. The limiting groove (42) is arranged as a groove structure matched with the limiting member (4).

3. A surgical positioning ruler according to claim 2, characterized in that: The driving member (44) is configured as a paddle. A connecting hole (45) is provided on the top wall of the strip block (31) along the length direction of the second scale (2). The connecting hole (45) is connected to the mounting hole (41). A connecting block (46) is slidably arranged in the connecting hole (45). One end of the connecting block (46) is fixedly connected to the limiting member (4), and the other end is fixedly connected to the bottom of the driving member (44).

4. A surgical positioning ruler according to claim 3, characterized in that: A guide block (48) is fixedly arranged on a side of the strip block (31) away from the stopper (4) along the length direction of the strip block (31); a guide groove (49) adapted to the guide block (48) is opened on the side wall of the strip hole (3) along the length direction of the strip hole (3); and the guide block (48) is slidably arranged in the guide groove (49); A rotating shaft (7) is fixedly mounted at the bottom of the bar block (31), a rotating groove (71) for rotationally connecting the rotating shaft (7) is provided at the top of the second scale (2), the bar block (31) is rotationally connected to the second scale (2) via the rotating shaft (7), and a plurality of angle marking lines (8) having the same starting point are engraved on the upper surface of the second scale (2).

5. A surgical positioning ruler according to claim 1, characterized in that: A semicircular meter (5) is rotatably arranged at the end of the first scale (1), and a pointer (51) is arranged at one end of the first scale (1) close to the semicircular meter (5); linear scale lines are arranged along the length direction on the straight part of the semicircular meter (5); and radial scale lines are arranged along the circumference direction on the circumference of the semicircular meter (5).

6. A positioning ruler for surgical operation according to claim 5, characterized in that: A through hole (52) is provided in the horizontal part of the semicircular meter (5), a mounting shaft (53) is slidably inserted in the through hole (52), a through hole (54) is provided on the first scale (1) for the mounting shaft (53) to pass through, a contact piece (55) is fixedly provided at one end of the mounting shaft (53), the top of the contact piece (55) is used to contact with the bottom of the semicircular meter (5), and a fastening sleeve (56) is threadedly sleeved at one end of the mounting shaft (53) away from the contact piece (55).

7. A positioning ruler for surgical operation according to claim 6, characterized in that: A clamping piece (57) is slidably sleeved on the mounting shaft (53) along the length direction of the mounting shaft (53), one side of the clamping piece (57) is used to abut against the top of the first scale (1), and the other side is used to abut against the bottom of the fastening sleeve (56), and a second elastic member (58) is provided on the mounting shaft (53), and the second elastic member (58) is used to drive the clamping piece (57) to move toward the first scale (1).

8. A positioning ruler for surgical operation according to claim 7, characterized in that: A slide groove (6) is provided on the installation shaft (53) along the length direction of the installation shaft (53), a slider (61) is slidably provided in the slide groove (6), the slider (61) is fixedly connected to the inner wall of the clamping plate (57), the second elastic member (58) is provided in the slide groove (6), the second elastic member (58) is configured as a tension spring, one end of the second elastic member (58) is in contact with the slider (61), and the other end is in contact with the bottom wall of the slide groove (6).

9. A positioning ruler for surgical operation according to claim 8, characterized in that: The second scale (2) is located below the first scale (1), and the middle part of the first scale (1) is thickened; two slide grooves (6) are symmetrically provided on the mounting shaft (53), and a slider (61) and a second elastic member (58) are slidably provided in each slide groove (6); the slider (61) protrudes from the inner periphery of the abutting sheet (57) and is formed integrally with the abutting sheet (57).

10. A positioning ruler for surgical operation according to claim 4, characterized in that: A plurality of limiting grooves (42) provided on the side wall of the strip hole (3) form a sawtooth structure along the length direction of the strip hole (3); the first elastic member (43) is provided as a compression spring, one end of the first elastic member (43) abuts against the tail of the limiting member (4), and the other end abuts against the inner wall of the mounting hole (41); the guide groove (49) is provided as a T-shaped groove or a dovetail groove, and the guide block (48) is provided as a T-shaped block or a dovetail block adapted to the guide groove (49).

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