Lead wire fixing plate

By designing a lead wire fixing plate for electrocardiogram and other equipment, the problem of lead wire winding and interweaving is solved, and the effective carding and fixing of lead wires is realized, reducing the labor intensity of medical staff and improving rescue efficiency.

CN222853893UActive Publication Date: 2025-05-13TIANMEN FIRST PEOPLES HOSPITAL
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Patent Information

Application Number
CN202421153938.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-24
Publication Date
2025-05-13
Estimated Expiration
2034-05-24

AI Technical Summary

Technical Problem

The lead wires on the electrocardiogram, electrocardiometer and defibrillator are improperly sorted and fixed, which affects the use, increases the labor intensity of medical staff, and delays the rescue time.

Method used

A lead wire fixing plate is designed, including a plate body, a solider, a wire reel, a clamping fixing mechanism and a support mechanism. Through the cooperation of the clamping fixing mechanism and a support mechanism, the lead wire is combed and fixed.

Benefits of technology

Through this lead wire fixing plate, it is easy to sort out and fix the lead wire, reduce the labor intensity of medical staff, and improve rescue efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of medical treatment, and particularly relates to a lead wire fixing plate which comprises a plate body, a wire fixing device, a wire winder, a clamping and fixing mechanism and a supporting mechanism, a rotating seat is arranged on the plate body, the rotating seat is rotatably connected with a fixing rod, a plurality of mounting holes are formed in the plate body at equal intervals in an array mode, and the supporting mechanism is arranged on the plate body. The mounting holes are connected with mounting blocks on the wire fixing device and the wire winder in a clamped mode, the wire fixing device is composed of the mounting blocks, a mounting base, a wire fixing pipe, a first anti-skid rubber mat and a baffle, clamping teeth are arranged on the baffle, clamping grooves matched with the clamping teeth are formed in the wire fixing pipe, and the wire winder is composed of a wire winding box, a wire winding roll, a box cover and a rotating block. A strip-shaped groove is formed in the wire winding box, a wire clamping groove is formed in the wire winding roll, a protruding block is arranged on the wire winding roll, and the protruding block is matched with a groove formed in the box cover. By means of the lead wire carding and fixing device, lead wires can be conveniently carded and fixed, the labor intensity of medical workers can be reduced, and the rescue efficiency can be improved.
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Description

Technical Field

[0001] The utility model belongs to the technical field of medical treatment, and in particular relates to a lead wire fixing plate. Background Art

[0002] Electrocardiographs, heart rate monitors and defibrillators play an important role in ambulances. They play a key role in emergency medical response, enabling medical staff to quickly and accurately evaluate and treat patients' heart problems in emergency situations, winning precious time for saving patients' lives. At the same time, these devices also reflect the rapid development and progress of modern medical technology, providing a more solid guarantee for people's health and safety. At present, due to the number and angle of lead wires on electrocardiographs, heart rate monitors and defibrillators, the lead wires are entangled and intertwined and cannot be properly combed and fixed, which not only affects their use, but also increases the labor intensity of medical staff and delays rescue time. Utility Model Content

[0003] In view of the above problems, the purpose of the present invention is to provide a lead wire fixing plate to solve the problems raised in the above background technology.

[0004] To achieve the above purpose, the utility model adopts the following technical solution: a lead wire fixing plate, including a plate body, a wire fixer, a wire reel, a clamping and fixing mechanism and a supporting mechanism, wherein the clamping and fixing mechanism is composed of a clamping seat, a bolt and a clamping plate, and the supporting mechanism is composed of a fixing rod, a supporting rod and a spring clamping block, wherein the spring clamping block is arranged on the fixing rod and is connected with a clamping hole provided on the supporting rod, a rotating seat is arranged on the plate body, and the rotating seat is connected with the fixing rod in rotation, and the plate body is provided with equidistant arrays. There are a number of mounting holes, which are engaged with the mounting blocks on the wire fixer and the wire reel. The wire fixer is composed of a mounting block, a mounting seat, a wire fixing tube, a non-slip rubber pad and a baffle. The baffle is provided with a locking tooth, and the wire fixing tube is provided with a locking groove matched with the locking tooth. The wire reel is composed of a wire reel box, a wire reel, a box cover and a rotating block. The wire reel box is provided with a strip groove, and the wire reel is provided with a wire locking groove. The wire reel is provided with a protrusion, which is matched with the groove provided on the box cover.

[0005] The beneficial effects of the utility model are as follows: the utility model is used to facilitate the combing and fixing of the lead wires, thereby reducing the labor intensity of medical personnel and improving the rescue efficiency.

[0006] In order to facilitate the fixing of the board and increase the stability of the fixation:

[0007] As a further improvement of the above technical solution: the bolt vertically penetrates the bottom end of the clamping seat and is connected to the clamping plate located at the inner end of the clamping seat, and the top end of the clamping plate and the top wall of the inner end of the clamping seat are both provided with anti-slip rubber pads 2.

[0008] The beneficial effect of this improvement is that after the clamping seat is clamped on the platform where the equipment is placed or other nearby fixed objects, the clamping plate only needs to be moved by screwing the bolt inward, and the clamping plate can clamp the platform or fixed object and fix the use position of the plate body by cooperating with the clamping seat. By setting up the second anti-slip rubber pad, the friction coefficient can be increased and the stability during clamping and fixing can be enhanced.

[0009] In order to facilitate the adjustment and fixation of the clamping seat use angle and the plate use direction:

[0010] As a further improvement of the above technical solution: one end of the fixed rod is rotatably connected to the middle part of the top end of the clamping seat, and its outer end is movably sleeved with a support rod, the other end of the support rod away from the clamping seat is rotatably connected to a rotating seat arranged in the middle part of the bottom end of the plate body, a second knob is rotatably provided at the rotating connection between the support rod and the rotating seat, and a first knob is rotatably provided at the rotating connection between the fixed rod and the clamping seat.

[0011] The beneficial effect of this improvement is that by rotating knob one, the use angle of the clamping seat can be adjusted and fixed to adapt to clamping and fixing operations in different directions on different fixed objects, and when rotating knob two, the plate body can be rotated to adjust and fix its use direction.

[0012] In order to facilitate the adjustment and fixation of the height of the board:

[0013] As a further improvement of the above technical solution: the number of the clamping holes is several, and the several clamping holes are equidistantly opened on both sides of the support rod along the length direction of the support rod.

[0014] The beneficial effect of this improvement is that by pressing the spring block to move inward and separate from the hole, the support rod can be moved to drive the plate body to move, thereby adjusting the height of the plate body; when the spring block pops outward and is stuck in the hole at the current position, the support rod can be fixed in position.

[0015] To facilitate the fixation and removal of the lead wire:

[0016] As a further improvement of the above technical solution: the mounting block is arranged at the rear end of the mounting seat, and the wire fixing tube and the baffle are both arranged at the front end of the mounting seat, and the baffle is located on one side of the wire fixing tube, and the wire fixing tube is open near the baffle, one side of the opening is the fixed end, and the other side is the movable end, and the number of the card slots is several, and the several card slots are equidistantly arranged on the outer wall of the movable end of the wire fixing tube.

[0017] The beneficial effect of the present improvement is as follows: after the lead wire is inserted into the wire fixing tube through the opening, the movable end of the wire fixing tube is inserted into the gap between the fixed end and the baffle and continuously moved inward, the inner diameter of the wire fixing tube is contracted to adapt to the thickness of the lead wire, and the latching teeth provided on the inner side of the baffle are latched into the latching grooves of the corresponding distance, thereby completing the position fixing operation of the lead wire. When the outer baffle separates the latching teeth from the latching groove, and then the movable end of the wire fixing tube is pulled out to open the opening, the lead wire can be taken out.

[0018] To enhance the stability of the lead wire when it is fixed:

[0019] As a further improvement of the above technical solution: the anti-slip rubber pad is arranged on the inner wall of the wire fixing tube.

[0020] The beneficial effect of this improvement is that by providing the anti-skid rubber pad 1 on the inner wall of the wire fixing tube, when the wire fixing tube fixes the lead wire, the anti-skid rubber pad 1 can fit tightly with the outer wall of the lead wire, which can increase the friction coefficient and enhance the stability of the lead wire when it is fixed.

[0021] To facilitate winding and storage of the lead wire:

[0022] As a further improvement of the above technical solution: the wire reel is rotatably arranged at the inner end of the wire reel box, a wire clamping groove is opened in the middle of the wire reel, and protrusions are arranged on both sides of the middle of the wire reel near the box cover.

[0023] The beneficial effect of this improvement is that when the lead wire is long, the lead wire can be wound and stored by simply inserting the lead wire into the wire clamping groove and rotating the winding reel.

[0024] In order to facilitate the rotation of the reel when the reel box opening is closed:

[0025] As a further improvement of the above technical solution: the box cover is arranged at the opening of the winding box, and the top and bottom ends of the winding box are both provided with strip grooves, the strip grooves are connected with the inner end of the winding box, and a rotating block is rotatably arranged in the middle of the box cover, one side of the box cover is hinged to the winding box, and the inner end of the rotating block is provided with a groove corresponding to the position where the protrusion is set to facilitate the insertion of the protrusion.

[0026] The beneficial effect of this improvement is that by opening the strip grooves at the top and bottom of the winding box, the lead wire can be easily passed through them to the outside world. By closing the opening of the winding box by reclosing the box cover, the groove is stuck on the outer end of the protrusion. When the box cover is closed, the user can drive the winding reel to rotate through the rotating block to reel and release the lead wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the positive end structure of the utility model;

[0028] Figure 2This is a schematic diagram of the plate height adjustment structure of the utility model;

[0029] Figure 3 It is a side sectional view of the plate body of the utility model;

[0030] Figure 4 For the utility model Figure 3 Partial enlarged view of point A;

[0031] Figure 5 It is a schematic diagram of the internal structure of the side end of the wire reel of the utility model;

[0032] Figure 6 This is a schematic diagram of the positive end structure of the wire fixer of the utility model;

[0033] Figure 7 This is a schematic diagram of the positive end structure of the wire reel of the utility model;

[0034] Figure 8 This is a schematic diagram of the box cover opening structure of the utility model;

[0035] In the figure: 1. plate; 2. wire holder; 3. wire reel; 4. clamping seat; 5. bolt; 6. clamping plate; 7. fixing rod; 8. supporting rod; 9. spring clamping block; 10. clamping hole; 11. rotating seat; 12. mounting hole; 13. mounting block; 14. mounting seat; 15. wire fixing tube; 16. anti-skid rubber pad 1; 17. baffle; 18. clamping tooth; 19. clamping groove; 20. wire winding box; 21. wire winding reel; 22. box cover; 23. rotating block; 24. strip groove; 25. wire clamping groove; 26. protrusion; 27. groove; 28. anti-skid rubber pad 2; 29. ​​knob 1; 30. knob 2. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0037] like Figure 1-8As shown, a lead wire fixing plate includes a plate body 1, a wire fixer 2, a wire reel 3, a clamping and fixing mechanism and a supporting mechanism, and the clamping and fixing mechanism is composed of a clamping seat 4, a bolt 5 and a clamping plate 6, and the supporting mechanism is composed of a fixing rod 7, a supporting rod 8 and a spring clamping block 9, the spring clamping block 9 is arranged on the fixing rod 7, and is engaged with a clamping hole 10 opened on the supporting rod 8, the plate body 1 is provided with a rotating seat 11, and the rotating seat 11 is rotatably connected to the fixing rod 7, the plate body 1 is provided with a plurality of mounting holes 12 in an equidistant array, the mounting holes 12 are engaged with mounting blocks 13 on the wire fixer 2 and the wire reel 3, the wire fixer 2 is composed of a mounting block 13, a mounting seat 14, a wire fixing tube 15, an anti-slip rubber pad 16 and a baffle 17 The baffle 17 is provided with a latching tooth 18, and the fixed wire tube 15 is provided with a latching groove 19 adapted to the latching tooth 18. The wire reel 3 is composed of a wire reel box 20, a wire reel 21, a box cover 22 and a rotating block 23. The wire reel box 20 is provided with a strip groove 24, and the wire reel 21 is provided with a wire latching groove 25. The wire reel 21 is provided with a protrusion 26, and the protrusion 26 is adapted to the groove 27 provided on the box cover 22. The utility model is convenient for combing and fixing the lead wire, which can reduce the labor intensity of medical staff and improve the rescue efficiency. The bolt 5 vertically penetrates the bottom end of the clamping seat 4 and is connected to the clamping plate 6 located at the inner end of the clamping seat 4, and the top end of the clamping plate 6 and the top wall of the inner end of the clamping seat 4 are both provided with anti-slip rubber pads 28. After the clamping seat 4 is clamped on the platform for placing the equipment or other nearby fixed objects, it is only necessary to screw the bolt 5 inward to drive the clamping plate 6 to move. The clamping plate 6 can clamp the platform or fixed object under the cooperation with the clamping seat 4 to fix the use position of the plate body 1. The establishment of the anti-slip rubber pad 28 can increase the friction coefficient and enhance the stability during clamping and fixing. One end of the fixing rod 7 is rotatably connected to the middle part of the top end of the clamping seat 4, and its outer end is movably sleeved with a support rod 8. The other end of the support rod 8 away from the clamping seat 4 is rotatably connected to the rotating seat 11 set in the middle part of the bottom end of the plate body 1. A knob 2 30 is rotatably provided at the rotating connection between the support rod 8 and the rotating seat 11, and a knob 1 29 is rotatably provided at the rotating connection between the fixing rod 7 and the clamping seat 4. By rotating the knob 2 9, the use angle of the clamping seat 4 can be adjusted and fixed so as to adapt to the clamping and fixing operations in different directions on different fixed objects. When the knob 2 30 is rotated, the plate body 1 can be rotated to adjust and fix its use direction. The number of the clamping holes 10 is several, and the several clamping holes 10 are equidistantly arranged on both sides of the support rod 8 along the length direction of the support rod 8. By pressing the spring clamping block 9 to move inward and separate from the clamping hole 10, the support rod 8 can be moved to drive the plate body 1 to move, thereby adjusting the use height of the plate body 1. When the spring clamping block 9 pops outward and is stuck in the clamping hole 10 at the current position, the support rod 8 can be fixed in position. The mounting block 13 is arranged at the rear end of the mounting seat 14, and the wire fixing tube 15 and the baffle 17 are both arranged at the positive end of the mounting seat 14.The baffle 17 is located on one side of the fixed wire tube 15. The fixed wire tube 15 is open near the baffle 17. One side of the opening is a fixed end and the other side is a movable end. There are a plurality of slots 19, which are equidistantly arranged on the outer wall of the movable end of the fixed wire tube 15. After the lead wire is inserted into the fixed wire tube 15 through the opening, the movable end of the fixed wire tube 15 only needs to be inserted into the gap between the fixed end and the baffle 17 and continuously moved inward, so that the inner diameter of the fixed wire tube 15 is shrunk to adapt to the thickness of the lead wire, and the clamping teeth 18 provided on the inner side of the baffle 17 are clamped into the corresponding The lead wire can be fixed in the card slot 19 with a distance of 1 / 2 m, and the position fixing operation of the lead wire can be completed. When the outer baffle 17 separates the card tooth 18 from the card slot 19, and then the movable end of the fixed wire tube 15 is pulled out to open the opening, the lead wire can be taken out. The anti-skid rubber pad 16 is arranged on the inner wall of the fixed wire tube 15. By setting up the anti-skid rubber pad 16 on the inner wall of the fixed wire tube 15, when the fixed wire tube 15 fixes the lead wire, the anti-skid rubber pad 16 can be closely fitted with the outer wall of the lead wire, which can increase the friction coefficient and enhance the stability of the lead wire when it is fixed. The wire reel 21 is rotatably arranged at the inner end of the wire reel box 20, a wire clamping groove 25 is opened in the middle of the wire reel 21, and protrusions 26 are arranged on both sides of the middle of the wire reel 21 near the box cover 22. When the lead wire is long, the lead wire only needs to be clamped into the wire clamping groove 25 and the wire reel 21 is rotated to wind and store the lead wire. The box cover 22 is covered at the opening of the wire reel box 20, and the top and bottom of the wire reel box 20 are both opened with strip grooves 24, which are connected to the inner end of the wire reel box 20, and the middle of the box cover 22 is rotatable. A rotating block 23 is provided, and one side of the box cover 22 is hinged with the winding box 20. A groove 27 for the convex block 26 to be inserted is provided at the inner end of the rotating block 23 corresponding to the position where the convex block 26 is provided. The strip grooves 24 at the top and bottom of the winding box 20 are provided to facilitate the lead wire to pass through it and go out to the outside. By closing the opening of the winding box 20 by re-covering the box cover 22, the groove 27 is stuck at the outer end of the convex block 26. When the box cover 22 is closed, the user can drive the winding reel 21 to rotate through the rotating block 23, thereby winding and releasing the lead wire.

[0038] The working principle of the utility model is as follows: after the clamping seat 4 is clamped on the platform for placing the equipment or other nearby fixed objects, it is only necessary to screw the bolt 5 inward to drive the clamping plate 6 to move, and the clamping plate 6 can clamp the platform or fixed object in cooperation with the clamping seat 4 to fix the use position of the plate body 1. The establishment of the anti-slip rubber pad 28 can increase the friction coefficient and enhance the stability during clamping and fixing. By rotating the knob 29, the use angle of the clamping seat 4 can be adjusted and fixed to adapt to the clamping and fixing operations in different directions on different fixed objects. When the knob 230 is rotated, the clamping seat 4 is adjusted and fixed to the use angle of the clamping seat 4. The plate body 1 can be rotated to adjust and fix its use direction. By pressing the spring clamp 9 to move inward and separate from the clamp hole 10, the support rod 8 can be moved to drive the plate body 1 to move, so as to adjust the use height of the plate body 1. When the spring clamp 9 pops outward and is clamped in the clamp hole 10 at the current position, the support rod 8 can be fixed in position. After the lead wire is clamped into the fixed wire tube 15 through the opening, it is only necessary to insert the movable end of the fixed wire tube 15 into the gap between its fixed end and the baffle 17 and continuously move it inward, shrink the inner diameter of the fixed wire tube 15 to adapt to the thickness of the lead wire, and the clamping teeth 18 set on the inner side of the baffle 17 are clamped. The lead wire can be fixed by inserting the clamping teeth 18 into the clamping groove 19 of the corresponding distance, and the position fixing operation of the lead wire can be completed. When the outer baffle 17 separates the clamping teeth 18 from the clamping groove 19, the movable end of the wire fixing tube 15 is pulled out to open the opening, and the lead wire can be taken out. By setting the anti-skid rubber pad 16 on the inner wall of the wire fixing tube 15, the anti-skid rubber pad 16 can be closely fitted with the outer wall of the lead wire when the wire fixing tube 15 is used to fix the lead wire, which can increase the friction coefficient and enhance the stability of the lead wire when it is fixed. When the lead wire is long, the lead wire only needs to be clamped into the clamping groove 25 and the winding reel 21 can be rotated to fix the lead wire. For winding and storage, the strip grooves 24 at the top and bottom of the winding box 20 are provided, so that the lead wire can pass through it and go out to the outside. The opening of the winding box 20 is closed by returning the box cover 22 so that the groove 27 is stuck at the outer end of the protrusion 26. When the box cover 22 is closed, the user can drive the winding reel 21 to rotate through the rotating block 23, so as to wind and release the lead wire. Through the establishment of the mounting hole 12 on the plate body 1, the wire holder 2 and the wire reel 3 can be easily stuck in the mounting hole 12 at any position through the mounting block 13 provided thereon, so as to complete the installation and fixing operation on the plate body 1, thereby increasing the flexibility of use.

[0039] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0040] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, they can make several improvements, embellishments or changes, and can also combine the above technical features in an appropriate manner; these improvements, embellishments, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A lead wire fixing plate, comprising a plate body (1), a wire fixing device (2), a wire reel (3), a clamping and fixing mechanism and a supporting mechanism, wherein the clamping and fixing mechanism is composed of a clamping seat (4), a bolt (5) and a clamping plate (6), and the supporting mechanism is composed of a fixing rod (7), a supporting rod (8) and a spring clamping block (9), wherein the spring clamping block (9) is arranged on the fixing rod (7) and is clamped and connected with a clamping hole (10) provided on the supporting rod (8), characterized in that: The plate body (1) is provided with a rotating seat (11), and the rotating seat (11) is rotatably connected to the fixing rod (7). The plate body (1) is provided with a plurality of mounting holes (12) in an equidistant array. The mounting holes (12) are engaged with mounting blocks (13) on the wire fixer (2) and the wire reel (3). The wire fixer (2) is composed of a mounting block (13), a mounting seat (14), a wire fixing tube (15), an anti-slip rubber pad (16) and a baffle (17). The baffle (17) is provided with a latching tooth. (18), and a clamping groove (19) matched with the clamping tooth (18) is provided on the wire fixing tube (15), and the wire reel (3) is composed of a wire reel box (20), a wire reel (21), a box cover (22) and a rotating block (23), the wire reel box (20) is provided with a strip groove (24), and the wire reel (21) is provided with a wire clamping groove (25), and the wire reel (21) is provided with a protrusion (26), and the protrusion (26) is matched with a groove (27) provided on the box cover (22).

2. A lead wire fixing plate according to claim 1, characterized in that: The bolt (5) vertically penetrates the bottom end of the clamping seat (4) and is connected to a clamping plate (6) located at the inner end of the clamping seat (4), and the top end of the clamping plate (6) and the top wall of the inner end of the clamping seat (4) are both provided with two anti-slip rubber pads (28).

3. A lead wire fixing plate according to claim 1, characterized in that: One end of the fixing rod (7) is rotatably connected to the middle of the top end of the clamping seat (4), and a support rod (8) is movably sleeved on the outer end thereof; the other end of the support rod (8) away from the clamping seat (4) is rotatably connected to a rotating seat (11) provided at the middle of the bottom end of the plate body (1); a second knob (30) is rotatably provided at the rotating connection between the support rod (8) and the rotating seat (11), and a first knob (29) is rotatably provided at the rotating connection between the fixing rod (7) and the clamping seat (4).

4. A lead wire fixing plate according to claim 1, characterized in that: The number of the clamping holes (10) is a plurality, and the plurality of clamping holes (10) are equidistantly arranged on both sides of the support rod (8) along the length direction of the support rod (8).

5. A lead wire fixing plate according to claim 1, characterized in that: The mounting block (13) is arranged at the rear end of the mounting seat (14), and the wire fixing tube (15) and the baffle (17) are both arranged at the front end of the mounting seat (14), and the baffle (17) is located at one side of the wire fixing tube (15), and the wire fixing tube (15) is open near the baffle (17), one side of the opening is a fixed end, and the other side is a movable end, and the number of the slots (19) is equidistantly arranged on the outer wall of the movable end of the wire fixing tube (15).

6. A lead wire fixing plate according to claim 1, characterized in that: The anti-slip rubber pad (16) is arranged on the inner wall of the wire fixing tube (15).

7. A lead wire fixing plate according to claim 1, characterized in that: The wire reel (21) is rotatably arranged at the inner end of the wire reel box (20), a wire clamping groove (25) is provided in the middle of the wire reel (21), and protrusions (26) are provided on both sides of the middle of the wire reel (21) near the box cover (22).

8. The lead wire fixing plate according to claim 1, characterized in that: The box cover (22) is arranged on the opening of the winding box (20), and the top and bottom ends of the winding box (20) are both provided with strip grooves (24), the strip grooves (24) are communicated with the inner end of the winding box (20), and a rotating block (23) is rotatably arranged in the middle of the box cover (22), one side of the box cover (22) is hinged to the winding box (20), and a groove (27) is arranged at the inner end of the rotating block (23) corresponding to the setting position of the protrusion (26) for facilitating the protrusion (26) to be inserted.