Slitting device of double-sided tape for mobile phone screen

Abstract

The utility model relates to the technical field of adhesive tape processing and slitting, and discloses a slitting device for a double-sided adhesive tape for a mobile phone screen, which comprises a base station, the bottom of a protection box is fixedly connected to the top of the base station, the top in the protection box is fixedly connected with an electric pusher, and the output end of the electric pusher is fixedly connected with a connecting plate. Connecting rods are fixedly connected to the side walls of the connecting plates, fixing blocks are fixedly connected to the left side and the right side of the inner wall of the protection box, sliding rails are arranged on the side walls of the fixing blocks, adjusting plates are slidably connected to the inner walls of the sliding rails, a plurality of sliding grooves are formed in the adjusting plates, and a plurality of sliding columns are slidably connected to the inner walls of the sliding grooves. According to the cutter spacing adjusting device, the electric pusher in the protection box drives the connecting plate and the connecting rod to move, the adjusting plate is promoted to drive the sliding column to move left and right in the sliding groove, the movable plate drives the fixed plate, the cutter holder and the cutter to move on the fixed column, cutter spacing adjustment is completed, the problem that the cutting width is limited due to the fixed cutter spacing is solved, and the production adaptability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of adhesive tape processing and dividing, and particularly relates to a dividing device for double-sided adhesive tape for mobile phone screens. BACKGROUND

[0002] With the continuous development of mobile phone technology, the screen size, shape and internal component layout are increasingly diversified, which makes the width specification of double-sided adhesive tape required when pasting the screen become more abundant. In order to meet the production needs of such refinement and diversification, a device capable of efficiently and accurately dividing double-sided adhesive tape becomes the key to the development of the industry. Such a dividing device needs to have good adaptability while ensuring the quality of the division to meet various requirements for the width of the adhesive tape in different mobile phone screen production processes. In addition, it also needs to achieve high standards in terms of operational convenience, maintenance convenience and production efficiency.

[0003] The existing adhesive tape dividing device usually uses a fixed mechanical structure for cutting operation. The cutting tool is usually directly fixed on the tool holder through bolts or other connecting members, and the connection between the tool holder and the device main body is also relatively fixed. Once the cutting width is set, it needs to be adjusted manually using tools to disassemble and reposition the tool, for example, first loosen the connecting bolts between the tool and the tool holder, then measure and adjust the tool position according to the required width, and then tighten the bolts again. At the same time, due to the complexity of tool disassembly and installation, the daily maintenance of the tool such as replacing the worn tool becomes very tedious, increasing the difficulty and cost of equipment maintenance.

[0004] Currently, there is a problem of difficulty in quickly adjusting the cutting width. Due to its fixed structure, the distance between the tools cannot be flexibly changed. When facing the cutting task of double-sided adhesive tape for mobile phone screens of different widths, it often needs to be stopped for a long time to reset and calibrate the distance between the tools. This not only seriously affects the production efficiency, causing production delays, but also easily causes cutting precision deviation during frequent adjustments, making the width of the cut adhesive tape not meet the requirements, thereby affecting the pasting quality of the mobile phone screen, increasing the product rejection rate, and not conducive to the enterprise to maintain high production efficiency and product quality advantage in the fierce market competition, limiting the production adaptability and flexibility of the enterprise, and difficult to meet the rapid development and diversified production needs of the modern mobile phone manufacturing industry. Therefore, a dividing device for double-sided adhesive tape for mobile phone screens is proposed to solve the above problems. SUMMARY

[0005] In order to make up for the above shortcomings, the utility model provides a dividing device for double-sided adhesive tape for mobile phone screens, which aims to improve the problem of limited cutting width caused by fixed tool distance in the prior art.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme:

[0007] A kind of mobile phone screen is with the slitting device of double-sided tape, including base station, the top of the base station is provided with roller assembly, the roller assembly is used to pay off and recover tape, the top of the base station is provided with slitting assembly, the slitting assembly is located in the middle position of the roller assembly, and the slitting assembly is used to slitting cutting of tape;

[0008] The slitting assembly includes protection box, the bottom of the protection box is fixedly connected to the top of the base station, the top of the inside of the protection box is fixedly connected with electric pusher, the output end of the electric pusher is fixedly connected with connecting plate, the side wall of the connecting plate is fixedly connected with connecting rod, the left and right sides of the inner wall of the protection box are fixedly connected with fixed block, the side wall of the fixed block is equipped with slide rail, the inner wall of the slide rail is slidably connected with adjusting plate, one end of the connecting rod is fixedly connected to the side wall of the adjusting plate, a plurality of slide grooves are formed in the inner of the adjusting plate, the slide grooves are radially distributed in the side wall of the adjusting plate, a plurality of slide columns are slidably connected in the inner wall of the slide groove, the bottom of the slide column is provided with fixing assembly, and the fixing assembly is used to fix the cutting tool for slitting cutting;

[0009] As further description of the above technical scheme:

[0010] The roller assembly includes tape supply roller and tape collection roller, and the bottom of the tape supply roller and the tape collection roller is fixedly connected to the top of the base station, and the tape supply roller and the tape collection roller are symmetrically distributed on the top of the base station.

[0011] As further description of the above technical scheme:

[0012] The bottom of the base station is provided with support leg, and the top of the support leg is fixedly connected to the bottom of the base station.

[0013] As further description of the above technical scheme:

[0014] The fixing assembly includes a plurality of movable plates, the top of the movable plate is fixedly connected to the bottom of the slide column, a plurality of fixed columns are arranged between the side wall of the fixed block, the fixed columns are arrayed between the side wall of the fixed block, and the left and right ends of the fixed column are fixedly connected to the side wall of the fixed block.

[0015] As further description of the above technical scheme:

[0016] The bottom of the movable plate is fixedly connected with fixed plate, and the bottom of the fixed plate is fixedly connected with fixed rod.

[0017] As further description of the above technical scheme:

[0018] The outer wall of the fixed rod is slidably connected with a movable ring, the inside of the fixed rod is provided with a plurality of balls, the balls are circumferentially distributed in the inside of the fixed rod, and the balls are slidably connected in the inside of the fixed rod.

[0019] As a further description of the above technical scheme:

[0020] A limiting spring is arranged between the fixed rod and the movable ring, one end of the limiting spring is fixedly connected to the side wall of the fixed rod, and the other end of the limiting spring is fixedly connected to the inner wall of the movable ring.

[0021] As a further description of the above technical scheme:

[0022] The inner wall of the fixed rod is provided with a movable rod, a groove is formed in the top outer wall of the movable rod, a tool holder is fixedly connected to the bottom of the movable rod, and a cutter is fixedly connected to the bottom of the tool holder.

[0023] The utility model has the advantages of the following beneficial effects:

[0024] 1. In the utility model, when the cutting distance needs to be adjusted according to different width cutting requirements, the electric pusher in the protection box drives the displacement of the connecting plate, and then drives the displacement of the connecting rod and the adjusting plate. Under the limitation of the sliding groove, the displacement of the sliding column left and right makes the movable plate move on the fixed column. The movable plate drives the displacement of the fixed plate, which promotes the displacement of the tool holder and the cutter. The cutting distance adjustment is completed, the quick tool distance adjustment is realized, various working conditions are met, the problem of limited cutting width caused by fixed tool distance is solved, and the production adaptability and flexibility are improved.

[0025] 2. In the utility model, the staff manually slides the movable ring, the limiting spring is pressed, the balls in the fixed rod are loose due to the lateral extrusion of the movable ring, then the movable rod is pulled down, the groove is pushed out of the sliding ball, the cutter can be taken down, the movable rod is inserted into the fixed rod during installation, the ball is pressed into the groove in the inner wall of the movable ring to complete the locking, the problems of complicated and time-consuming disassembly of traditional cutters, easy damage and influence on production efficiency are solved, the cutter maintenance convenience and production continuity are improved, and the equipment maintenance cost and downtime risk are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A three-dimensional schematic view of a slitting device for double-sided adhesive tape for a mobile phone screen is provided for the utility model;

[0027] Figure 2 A structure schematic view of an adjusting plate of a slitting device for double-sided adhesive tape for a mobile phone screen is provided for the utility model;

[0028] Figure 3 A structure schematic view of a fixed plate of a slitting device for double-sided adhesive tape for a mobile phone screen is provided for the utility model;

[0029] Figure 4 For Figure 3 Enlarged view of A in the middle.

[0030] Legend:

[0031] 1, base; 2, support leg; 3, protection box; 4, adhesive tape supply roller; 5, adhesive tape collection roller; 6, electric pusher; 7, connecting plate; 8, connecting rod; 9, adjusting plate; 10, sliding groove; 11, sliding column; 12, fixed block; 13, sliding rail; 14, fixed column; 15, movable plate; 16, fixed plate; 17, fixed rod; 18, movable ring; 19, movable rod; 20, knife seat; 21, cutting knife; 22, groove; 23, ball; 24, limiting spring. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0033] With reference to Figure 1 - Figure 3The utility model provides a kind of double-sided tape's slitting device for mobile phone screen, including base 1, base 1 top is provided with roller assembly, and roller assembly is used to pay off and recover adhesive tape, and base 1 top is provided with slitting assembly, and slitting assembly is located the middle position in roller assembly, and slitting assembly is used to the slitting cutting of adhesive tape;Slitting assembly includes protection box 3, and protection box 3 bottom is fixedly connected at base 1 top, and the top of protection box 3 inside is fixedly connected with electric pusher 6, and electric pusher 6 is the power source of driving adjustment action, and electric pusher 6 output end is fixedly connected with connecting plate 7, and connecting plate 7 is the component of connecting electric pusher 6 with connecting rod 8, and its shape design is flat, with certain strength and rigidity, can stably transmit force, and connecting plate 7 side wall is fixedly connected with connecting rod 8, and connecting rod 8 its shape design is cylindrical, can bear the tension and pressure generated in the adjustment process, and the left and right sides of the inner wall of protection box 3 are all fixedly connected with fixed block 12, and fixed block 12 is the component of supporting and guiding adjustment plate 9 movement, and the side wall of fixed block 12 is all provided with slide rail 13, to provide stable sliding path for adjustment plate 9, and the inner wall of slide rail 13 is slidably connected with adjustment plate 9, and one end of connecting rod 8 is fixedly connected in the side wall of adjustment plate 9, and multiple slide grooves 10 are arranged in adjustment plate 9, and its shape design is strip, and depth and width are determined according to the size of slide column 11, and its inner wall is finished, smooth and flat, to reduce the friction of slide column 11 when sliding, and slide groove 10 is distributed in the side wall of adjustment plate 9 in radial, and the inner wall of slide groove 10 is slidably connected with multiple slide columns 11, and slide column 11 is the component of connecting adjustment plate 9 with movable plate 15, and the bottom of slide column 11 is provided with fixed assembly, and fixed assembly is used to fix the cutter for slitting cutting, and roller assembly includes adhesive tape supply roller 4 and adhesive tape collection roller 5, and the bottom of adhesive tape supply roller 4 and adhesive tape collection roller 5 is all fixedly connected in base 1 top, and adhesive tape supply roller 4 and adhesive tape collection roller 5 are usually made of metal material, with sufficient strength and rigidity, to support the weight of whole roll of adhesive tape and guarantee that deformation does not occur in the process of paying off and collecting, and its both ends are installed on the support of base 1 top through bearing, guarantee the flexibility and stability of roller in the process of rotation, and adhesive tape supply roller 4 and adhesive tape collection roller 5 are distributed in base 1 top in left-right symmetry, and base 1 bottom is provided with support leg 2, and support leg 2 top is fixedly connected in base 1 bottom, and fixed assembly includes multiple movable plates 15, and movable plate 15 is the component of connecting slide column 11 with fixed plate 16, and its shape design is flat, can stably transmit force, and movable plate 15 top is all fixedly connected in the bottom of slide column 11, and multiple fixed columns 14 are arranged between the side wall of fixed block 12, and fixed column 14 is arrayed between the side wall of fixed block 12, and the left and right ends of fixed column 14 are all fixedly connected in the side wall of fixed block 12, and movable plate 15 inner wall is slidably connected in the outer wall of fixed column 14, and the inner wall of movable plate 15 is provided with through hole matched with fixed column 14, and fixed column 14 passes through the through hole of movable plate 15, so that movable plate 15 can linearly slide on fixed column 14.

[0034] Specifically, in the use of the device, first, the double-sided tape is cut by the tape supply roller 4 through the device inside the protection box 3, and finally wound on the tape collection roller 5. When the requirement of cutting different tape width is encountered, the distance between the cutting knives 21 needs to be adjusted. At this time, the electric pusher 6 inside the protection box 3 drives the connecting plate 7 to displace. The connecting plate 7 moves linearly along the direction set by the electric pusher 6 under the drive of the electric pusher 6. The displacement of the connecting plate 7 drives the displacement of the connecting rod 8, thereby promoting the displacement of the adjusting plate 9. The adjusting plate 9 moves linearly along the slide rail 13 on the side wall of the fixed block 12 under the drive of the connecting rod 8. The movement direction is the same as the displacement direction of the connecting rod 8. With the displacement of the adjusting plate 9 and under the limitation of the sliding groove 10, the multiple slide columns 11 inside the adjusting plate 9 displace left and right. The adjusting plate 9 is provided with multiple sliding grooves 10 which are distributed radially on the side wall of the adjusting plate 9. The slide columns 11 slide linearly left and right along the direction of the sliding groove 10 when the adjusting plate 9 displaces. The movable plate 15 moves linearly left and right along the axial direction of the fixed column 14 under the drive of the slide column 11. The movement direction is the same as the displacement direction of the slide column 11. The fixed plate 16 synchronously displaces when the movable plate 15 displaces. The displacement of the fixed plate 16 promotes the displacement of the knife seat 20 and the cutting knife 21. In this way, the adjustment of the distance between the cutting knives 21 is completed. The distance between the cutting knives 21 is accurately controlled by adjusting the working parameters of the electric pusher 6, thereby realizing the cutting of different width tapes and meeting the diversified requirements of double-sided tape width under different working conditions such as mobile phone screen production, greatly improving the applicability and flexibility of the device.

[0035] Reference Figure 4The bottom of the movable plate 15 is fixedly connected with a fixed plate 16, the bottom of the fixed plate 16 is fixedly connected with a fixed rod 17, the outer wall of the fixed rod 17 is slidably connected with a movable ring 18, the movable ring 18 is a key operating component for controlling the locking and unlocking of the cutter, the shape of the movable ring 18 is designed as an annular shape, the outer wall has a texture to increase the friction between the fingers and the movable ring 18, so as to facilitate the staff to exert force to pull, the inner diameter of the movable ring 18 is slightly larger than the outer diameter of the fixed rod 17, so as to be able to smoothly slide on the outer wall of the fixed rod 17, a plurality of balls 23 are arranged in the fixed rod 17, the balls 23 are components for realizing the locking function of the movable rod 19 and the fixed rod 17, the shape of the balls 23 is a standard spherical shape, the surface of the balls 23 is finely polished and polished to ensure that the friction when the balls 23 contact the fixed rod 17 and the movable rod 19 is minimized, and the balls 23 can smoothly roll in the fixed rod 17, the balls 23 are circumferentially distributed in the fixed rod 17, the balls 23 are slidably connected in the fixed rod 17, a limiting spring 24 is arranged between the fixed rod 17 and the movable ring 18, the limiting spring 24 is an elastic element for controlling the displacement range of the movable ring 18 and providing a restoring force, one end of the limiting spring 24 is fixedly connected to the side wall of the fixed rod 17, the other end of the limiting spring 24 is fixedly connected to the inner wall of the movable ring 18, the inner wall of the fixed rod 17 is provided with a movable rod 19, the movable rod 19 is a component for connecting the cutter holder 20 and the fixed rod 17, the shape of the movable rod 19 is designed as a cylindrical shape, has a certain strength and rigidity, and can withstand the tension and pressure generated during the dismounting and mounting of the cutter, a groove 22 is formed in the outer wall of the top of the movable rod 19, the shape and size of the groove 22 are matched with the balls 23, the groove 22 provides a space for the balls 23 to embed when the cutter is locked, realizes the stable connection of the movable rod 19 and the fixed rod 17, the bottom of the movable rod 19 is fixedly connected with a cutter holder 20, the bottom of the cutter holder 20 is fixedly connected with a cutter 21, the cutter 21 is a component for directly cutting the adhesive tape

[0036] Specifically, first, the staff manually slides the movable ring 18 upwards. In the normal state, the movable ring 18 is located at a specific position on the fixed rod 17, and exerts a lateral extrusion force on the internal ball 23, so that the ball 23 is kept in a stable working position. When the staff pulls the movable ring 18 upwards, the movable ring 18 moves linearly along the outer wall of the fixed rod 17 away from the knife seat 20. With the upward displacement of the movable ring 18, the internal limiting spring 24 is compressed under stress. In the normal state, the limiting spring 24 is in a certain compression state, providing an outward thrust for the movable ring 18, so that the movable ring 18 will not be displaced at will without external force pulling it. When the movable ring 18 is displaced upwards, the limiting spring 24 is further compressed. At the same time, the internal ball 23 of the fixed rod 17 loses the lateral extrusion force from the inner wall of the movable ring 18, and thus becomes loose. In the normal working state, the ball 23 is partially embedded in the groove 22 of the movable rod 19 under the action of the lateral extrusion force of the inner wall of the movable ring 18, and is in close contact with the inner wall of the fixed rod 17. In this way, the connection and locking of the movable rod 19 and the fixed rod 17 are realized, preventing the tool from falling off during work. After the lateral extrusion force disappears due to the upward displacement of the movable ring 18, the ball 23 becomes loose in the fixed rod 17 under the action of its own gravity and other external forces, and its movement state changes from being extruded and fixed to being able to roll freely. At this time, the staff can manually pull down the movable rod 19. Under the pulling of the staff, the movable rod 19 moves linearly along the axial direction of the fixed rod 17 away from the fixed plate 16. At this time, the movable rod 19 is displaced downwards, and the groove 22 is also displaced downwards. The displacement of the groove 22 pushes the ball 23 to slide outward, thereby completing the unlocking of the movable rod 19, and the entire tool can be removed. When the groove 22 is displaced downwards with the movable rod 19, since the ball 23 is already in a loose state, the inner wall of the groove 22 will gradually contact and push the ball 23 to slide outward along the radial direction of the fixed rod 17. The sliding direction is from the groove 22 to the space between the fixed rod 17 and the movable ring 18, and finally completely separates from the contact with the groove 22. At this time, the connection between the movable rod 19 and the fixed rod 17 is released, and the knife seat 20 and the bottom cutter 21 can be removed together with the movable rod 19. When installing the tool, the staff inserts the movable rod 19 into the fixed rod 17 upwards. When the movable rod 19 is inserted to a certain depth, the ball 23 will roll inward along the radial direction of the fixed rod 17 under the action of the lateral extrusion force of the inner wall of the movable ring 18. The rolling direction is from the space between the fixed rod 17 and the movable ring 18 to the groove 22, and finally partially embeds in the groove 22, realizing the locking connection of the movable rod 19 and the fixed rod 17, thereby fixing the knife seat 20 and the cutter 21 in the corresponding position, completing the installation of the tool. Through this design of quick disassembly and installation of the tool, the maintenance efficiency of the slitting device is greatly improved, and the tool can be replaced or maintained in time.Ensure that the slitting device can work continuously and stably during long-term use, provide efficient and accurate double-sided tape slitting service for related industries such as mobile phone screen production.

[0037] Working principle: when using the slitting device, first, the double-sided tape is cut and slitted by the tape supply roller 4 through the device inside the protection box 3, and finally wound on the tape collection roller 5, when the requirement of cutting different tape width is encountered, the distance of the cutter 21 needs to be adjusted, at this time, the electric pusher 6 inside the protection box 3 drives the connecting plate 7 to displace, the displacement of the connecting plate 7 drives the displacement of the connecting rod 8, thereby promoting the displacement of the adjusting plate 9, with the displacement of the adjusting plate 9, and under the limitation of the sliding groove 10, the multiple slide columns 11 inside it displace left and right, the displacement of the slide column 11 drives the displacement of the movable plate 15 on the fixed column 14, at the same time, the displacement of the movable plate 15 also drives the displacement of the fixed plate 16, the displacement of the fixed plate 16 promotes the displacement of the cutter holder 20 and the cutter 21, so as to complete the adjustment of the distance of the cutter 21, thereby realizing the effect of quickly adjusting the cutter distance to meet the requirements of different working conditions, when maintaining the tool in daily life, first, the worker manually slides the movable ring 18 upwards, with the upward displacement of the movable ring 18, the force of the limiting spring 24 inside it is compressed, at the same time, the ball 23 inside the fixed rod 17 loses the lateral extrusion force from the inner wall of the movable ring 18, thereby becoming loose, at this time, the worker can manually pull down the movable rod 19, at this time, the movable rod 19 displaces downward, the recess 22 also displaces downward, the displacement of the recess 22 pushes the ball 23 to slide outward, so as to complete the release of the movable rod 19, at the same time, the whole tool can be taken off, when installing, only need to insert the movable rod 19 into the fixed rod 17, the ball 23 slides into the recess 22 under the extrusion of the inner wall of the movable ring 18, so as to complete the locking of the tool, thereby realizing the effect of quickly disassembling and installing the tool.

[0038] Finally, it should be pointed out that: the above only for preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A slitting device for double-sided adhesive tape for mobile phone screens, comprising a base (1), characterized in that: The base (1) top is provided with a roller assembly, the roller assembly is used for unwinding and recycling adhesive tape, the base (1) top is provided with a slitting assembly, the slitting assembly is located in the middle position of the roller assembly, and the slitting assembly is used for slitting and cutting of the adhesive tape. The slitting assembly comprises a protection box (3), the bottom of the protection box (3) is fixedly connected to the top of the base (1), the top of the inside of the protection box (3) is fixedly connected with an electric pusher (6), the output end of the electric pusher (6) is fixedly connected with a connecting plate (7), the side wall of the connecting plate (7) is fixedly connected with a connecting rod (8), the left and right sides of the inner wall of the protection box (3) are fixedly connected with a fixed block (12), the side wall of the fixed block (12) is provided with a slide rail (13), the inner wall of the slide rail (13) is slidably connected with an adjusting plate (9), one end of the connecting rod (8) is fixedly connected to the side wall of the adjusting plate (9), a plurality of slide grooves (10) are formed in the inside of the adjusting plate (9), the slide grooves (10) are radially distributed on the side wall of the adjusting plate (9), and the inner wall of the slide groove (10) is slidably connected with a plurality of slide columns (11).

2. The slitting device for double-sided tape for mobile phone screens according to claim 1, characterized in that: The roller assembly comprises an adhesive tape supply roller (4) and an adhesive tape collection roller (5), and the bottom of the adhesive tape supply roller (4) and the adhesive tape collection roller (5) is fixedly connected to the top of the base (1), and the adhesive tape supply roller (4) and the adhesive tape collection roller (5) are symmetrically distributed on the top of the base (1).

3. The apparatus according to claim 1, wherein the apparatus is characterized by: The bottom of the base (1) is provided with a supporting leg (2), and the top of the supporting leg (2) is fixedly connected to the bottom of the base (1).

4. The apparatus according to claim 1, wherein the apparatus is characterized by: The fixed assembly comprises a plurality of movable plates (15), the top of the movable plate (15) is fixedly connected to the bottom of the slide column (11), a plurality of fixed columns (14) are arranged between the side walls of the fixed block (12), the fixed columns (14) are arrayed between the side walls of the fixed block (12), and the left and right ends of the fixed column (14) are fixedly connected to the side walls of the fixed block (12).

5. The apparatus according to claim 4, wherein the apparatus further comprises a cutting device. The bottom of the movable plate (15) is fixedly connected with a fixed plate (16), and the bottom of the fixed plate (16) is fixedly connected with a fixed rod (17).

6. The apparatus according to claim 5, wherein the apparatus further comprises a cutting device. The outer wall of the fixed rod (17) is slidably connected with a movable ring (18), a plurality of rolling balls (23) are arranged in the inside of the fixed rod (17), the rolling balls (23) are circumferentially distributed in the inside of the fixed rod (17), and the rolling balls (23) are slidably connected in the inside of the fixed rod (17).

7. The apparatus according to claim 6, wherein the apparatus is characterized by: A limiting spring (24) is arranged between the fixed rod (17) and the movable ring (18), one end of the limiting spring (24) is fixedly connected to the side wall of the fixed rod (17), and the other end of the limiting spring (24) is fixedly connected to the inner wall of the movable ring (18).

8. The apparatus according to claim 7, wherein the apparatus is characterized by: The inner wall of the fixed rod (17) is provided with a movable rod (19), the outer wall of the top of the movable rod (19) is provided with a groove (22), the bottom of the movable rod (19) is fixedly connected with a cutter seat (20), and the bottom of the cutter seat (20) is fixedly connected with a cutter (21).

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