Coil pad processing equipment

Abstract

The invention relates to the technical field of electromagnetic oven equipment manufacturing, and provides coil pad machining equipment which comprises a forming mold and a supporting tray, the forming mold comprises an upper mold and a lower mold, the upper mold and the lower mold are buckled to form an installation space, and a terminal is clamped between the upper mold and the lower mold; the supporting tray is mounted in the mounting space, and one end of the supporting tray is connected with the terminal through the connecting assembly; the coil is placed in the supporting tray. According to the coil pad machining equipment, the sealing performance of the coil pad is kept.

Description

Technical Field

[0001] The present application relates to the technical field of induction cooker equipment manufacturing, and in particular to a coil pad processing equipment. Background Art

[0002] As an efficient, energy-saving and environmentally friendly cooking device, induction cookers have been widely used in modern kitchens. One of its core parts is the coil, which is made of wound copper wire and has two ends connected by terminals. The coil is responsible for converting electrical energy into magnetic energy, and then generating eddy currents in the cooker through the principle of electromagnetic induction to heat food.

[0003] In the manufacturing process of induction cookers, coil pads, as a key auxiliary material, play a vital role. Coil pads are not only used to support and fix coils to prevent them from displacement or deformation during operation, but also play the role of heat insulation, shock absorption and optimization of magnetic field distribution. Therefore, the processing quality and precision of coil pads have an important impact on the overall performance of induction cookers.

[0004] The conventional coil pad is made of two pieces of rubber material, and the coil is wrapped between the two pieces of rubber material. The existing coil pad processing method is to first make a first piece of rubber material, and open an installation space for the coil on the first piece of rubber material; then the second piece of rubber material is pasted and arranged with the first piece of rubber material and covers the surface of the installation space. However, the coil pad made by this method has poor sealing performance, and cracks are likely to occur between the two rubber materials after long-term use, thereby affecting the service life of the coil; it needs to be improved. Summary of the invention

[0005] In order to maintain the sealing of the coil gasket, the present application provides a coil gasket processing equipment.

[0006] The coil pad processing equipment provided in this application adopts the following technical solution: A coil pad processing equipment includes a forming mold and a supporting tray, the forming mold includes an upper mold and a lower mold, the upper mold and the lower mold are interlocked and combined to form an installation space, and the terminal is clamped between the upper mold and the lower mold; the supporting tray is installed in the installation space, and one end of the supporting tray is connected to the terminal through a connecting component; the coil is placed in the supporting tray.

[0007] By adopting the above-mentioned technical solution, the equipment can form a closed installation space by interlocking the upper mold and the lower mold, and connect the terminal and the support tray box through the connecting component; when the upper and lower molds clamp the terminal, a gap can be created between the support tray and the upper and lower walls of the installation space, so that the support tray can support the coil, reduce deformation or displacement of the coil during processing, and ensure the stability and accuracy of the coil during processing.

[0008] At this time, injection molding is performed into the installation space to integrate the coil pad, which can tightly combine the coil, support tray, and terminal, increase the sealing effect of the coil pad, reduce the cracking of the coil pad under long-term use, and increase the service life of the coil pad.

[0009] Optionally, the connecting assembly includes a mounting ring and a clamping block, the mounting ring is sleeved on the outer wall of the terminal, the clamping block is installed on the supporting tray, and the mounting ring is provided with a clamping groove for the supporting tray to be plugged in.

[0010] By adopting the above-mentioned technical solution, the mounting ring is sleeved on the outer wall of the terminal, and the snap-in block on the support tray is inserted into the snap-in groove of the mounting ring, so that the support tray and the terminal can be connected; and this installation method is relatively convenient, so that the staff can assemble the support tray and the coil before placing them in the installation space.

[0011] Optionally, the outer wall of the clamping block is wrapped with a rubber layer.

[0012] By adopting the above technical solution, the provision of the rubber layer enables the clamping block to be inserted into the clamping groove by interference fit, thereby increasing the stability of the connection between the terminal and the support tray.

[0013] Optionally, it also includes a traction mechanism, which includes a traction rope, a mounting frame, a winding roller and a servo motor, the winding roller is rotatably mounted on the mounting frame, and the servo motor is used to drive the winding roller to rotate; one end of the traction rope is fixed to the winding roller, and the connecting component is equipped with a guide tube, and the other end of the traction rope is passed through the guide tube and tied to the end of the support tray away from the connecting component.

[0014] When the support tray carries the coil, the end of the support tray away from the connecting component lacks sufficient supporting force, resulting in deformation under the action of gravity, causing the support tray to sink; by adopting the above-mentioned technical solution, before placing the support tray with the coil in the molding mold, the free end of the traction rope is first passed through the guide tube and connected to the end of the support tray away from the connecting component, and then the upper template and the lower template are buckled to form a closed installation space, and then the servo motor is driven to reel in the traction rope so that the traction rope is in a taut state; at this time, the traction rope lifts the end of the support tray away from the terminal to provide additional supporting force for the support tray, reducing the risk of deformation of the support tray when carrying the coil, thereby reducing the possibility of the support tray sinking due to its own gravity.

[0015] Optionally, the support tray is integrally formed with a guide plate, and the traction rope abuts against a side of the guide plate away from the support tray.

[0016] By adopting the above technical solution and setting a guide plate, a gap can be created between the traction rope and the coil, thereby reducing the contact between the traction rope and the coil during the manufacturing process of the coil pad, so as to maintain the normal use of the coil.

[0017] Optionally, the upper mold is provided with an installation groove connected to the installation space, a cutting block is arranged in the installation groove, the cutting block is provided with a cutting hole for the traction rope to pass through; a cutting knife is movably installed in the cutting hole, and the cutting block is provided with a movable component for driving the cutting knife to slide.

[0018] By adopting the above technical solution, after the coil pad is formed, the active component drives the cutting knife to slide, so that the cutting knife can cut the traction rope, thereby reducing the subsequent processing of the coil pad by the staff, improving work efficiency and shortening the processing cycle.

[0019] Optionally, a clamping block is installed on the top wall of the cutting hole, and the clamping block is located on the side of the cutting knife away from the installation space; the clamping block is hinged with a clamping plate, the length of the clamping block is greater than the inner diameter of the cutting hole, and the end of the clamping plate away from the clamping block is inclined toward the side of the installation space; a torsion spring is provided at the hinge between the clamping plate and the clamping block, and the elastic force of the torsion spring is used to clamp the traction rope between the clamping plate and the bottom wall of the cutting hole.

[0020] By adopting the above technical solution, in the initial state, the elastic force of the torsion spring keeps the clamping plate at an inclined angle; when the traction rope passes through the cutting hole, the clamping plate is rotated so that there is a gap between it and the bottom wall of the cutting hole to facilitate the smooth passage of the traction rope.

[0021] When the traction rope reaches the desired position, the elastic force of the torsion spring will drive the clamping plate to press against the upper wall of the traction rope and turn off the power of the servo motor, which can reduce the free sliding of the traction rope in the cutting hole under the gravity of the support tray, thereby reducing the possibility of the servo motor being turned on for a long time.

[0022] Optionally, the movable component includes a pull rod and a gear, the cutting block is provided with a driving groove, and the gear is rotatably installed in the driving groove; the clamping block is slidably installed on the inner wall of the cutting hole, and the pull rod is slidably installed on the cutting block and connected to the clamping block; the pull rod is provided with a first tooth groove, and the side wall of the cutting blade is provided with a second tooth groove, and the first tooth groove and the second tooth groove are both meshed with the gear.

[0023] By adopting the above-mentioned technical solution, when the installation space needs to be opened for coil pad forming, the worker pulls the traction rope toward the side away from the installation space; since the traction rope is clamped between the clamping plate and the bottom wall of the cutting hole, the clamping plate can slide toward the side away from the installation space; since the pull rod is connected to the clamping plate, the gear can rotate under the engagement of the first tooth groove, so that the cutting knife can slide to cut the traction rope.

[0024] Optionally, the abutment plate is provided on a barb for abutting against the cutting rope.

[0025] By adopting the above technical solution and providing barbs, the friction between the clamping plate and the traction rope can be increased, so that when the traction rope is pulled toward the side away from the installation space, the clamping block slides on the cutting block.

[0026] Optionally, a spring is provided between the pull rod and the cutting block, and the elastic force of the spring is used to drive the pressing block to move toward one side of the cutting knife.

[0027] By adopting the above-mentioned technical solution and setting a spring, when the pulling of the traction rope is cancelled, the elastic force of the spring can restore the clamping block to its original state; since the traction rope is clamped between the clamping plate and the bottom wall of the cutting hole, the traction rope can slide in the cutting hole and protrude from the outer wall of the cutting hole, so that the staff can pull the traction rope again to tie it to the support tray.

[0028] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting a support tray, when the upper and lower molds clamp the terminals, there can be a gap between the support tray and the upper and lower walls of the installation space, so that the support tray can support the coil, reduce the deformation or displacement of the coil during processing, and ensure the stability and accuracy of the coil during processing; and the coil pad is made in an integrated molding manner, which can tightly combine the coil, support tray, and terminal, and increase the sealing effect of the coil pad, reduce the cracking of the coil pad under long-term use, and improve the service life of the coil pad.

[0029] 2. By setting up a traction mechanism, when the support tray with the coil is placed in the molding mold, the traction rope is driven to reel in the traction rope so that the traction rope is in a taut state; at this time, the traction rope lifts the end of the support tray away from the terminal to provide additional supporting force for the support tray, thereby reducing the risk of deformation of the support tray when carrying the coil, thereby reducing the possibility of the support tray sinking due to its own gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a partial cross-sectional view of Example 1; Figure 2It is a schematic diagram of the structure of the coil; Figure 3 yes Figure 1 A local enlarged view of point a; Figure 4 is a schematic structural diagram of the baffle of Example 1; Figure 5 is a schematic structural diagram of a blocking member of Example 1; Figure 6 is a partial cross-sectional view of Example 2; Figure 7 yes Figure 6 A local enlarged view of point b; Figure 8 yes Figure 6 A local enlarged view of point c; Fig. 9 is a schematic structural diagram of a cutting block in Example 3; Fig.10 is a schematic structural diagram of a separator of Example 3; Fig.11 It is a structural diagram of the active components of Example 3.

[0031] Explanation of reference numerals: 1. Forming mold; 11. Frame; 12. Upper mold; 13. Lower mold; 14. Cylinder; 15. Installation space; 16. Installation slot; 2. Support tray; 21. Support plate; 22. Support plate; 23. Baffle; 24. Blocking member; 25. Elastic block; 26. Elastic slot; 27. Snap-in slot; 3. Connecting assembly; 31. Mounting ring; 32. Snap-in block; 4. Traction mechanism; 41. Mounting frame; 42. Winding roller; 43. Traction rope; 44. Servo motor machine; 45, guide tube; 46, mounting tube; 47, guide plate; 5, cutting block; 51, rubber pad; 52, cutting hole; 521, first hole; 522, second hole; 523, abutment groove; 524, cutting groove; 525, driving groove; 53, abutment block; 54, abutment plate; 55, spring; 56, cutting knife; 57, barb; 6, movable component; 61, gear; 62, pull rod; 63, first tooth groove; 64, second tooth groove; 7, separator; 8, coil; 81, terminal. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-11 This application is described in further detail.

[0033] Embodiment 1: The embodiment of the present application discloses a coil 8 pad processing device.

[0034] Reference Figure 1A coil 8 pad processing equipment includes a forming mold 1 and a supporting tray 2. The forming mold 1 includes a frame 11, an upper mold 12, a lower mold 13 and a cylinder 14. The lower mold 13 is fixed on the frame 11. The cylinder 14 is installed on the frame 11 and the movable plug of the cylinder 14 is connected to the upper mold 12. The movable plug of the cylinder 14 can drive the upper mold 12 and the lower mold 13 to buckle together.

[0035] Reference Figure 2 and Figure 3 An installation space 15 is formed between the upper mold 12 and the lower mold 13, the wire reel and the support tray 2 are installed in the installation space 15, and the terminal 81 is clamped between the upper mold 12 and the lower mold 13; the support tray 2 includes a support disk 22 and a support plate 21 arranged on one side of the support disk 22, and the support plate 21 and the support disk 22 are integrally formed; the support disk 22 and the support plate 21 are made of quartz material, which has good heat resistance and can reduce the melting of the coil 8 during the vulcanization process.

[0036] Reference Figure 4 The coil 8 is placed on the support plate 22, and the two ends of the coil 8 are placed above the support plate 21; baffles 23 are installed on the opposite sides of the support plate 21, and the two ends of the coil 8 are inserted between the two baffles 23. The setting of the baffle 23 can reduce the situation where the two ends of the coil 8 are separated from the top of the support plate 21.

[0037] Reference Figure 5 A plurality of blocking members 24 are rotatably mounted on the outer wall of the support disk 22, one end of the blocking member 24 is provided with an elastic card block 25, and the inner wall of the support disk 22 is provided with an elastic card slot 26 for the elastic card block 25 to be inserted into; the plug-in cooperation between the elastic card block 25 and the elastic card slot 26 can place the coil 8 between the blocking member 24 and the support disk 22, thereby increasing the stability of the wire coil on the support disk 22.

[0038] Reference Figure 3 One end of the support plate 21 away from the support disk 22 is connected to the terminal 81 through a connecting component 3. The connecting component 3 includes a mounting ring 31 and a clamping block 32. The clamping block 32 is arranged on one side of the support plate 21 and is integrally formed with the support plate 21. The outer wall of the clamping block 32 is wrapped with a rubber layer. The mounting ring 31 is sleeved on the outer wall of the terminal 81, and the mounting ring 31 is provided with a clamping groove 27 for the clamping block 32 to be inserted.

[0039] The implementation principle of Example 1 of the present application is: When making the coil 8 pad, the coil 8 and the support tray 2 are assembled outside the molding mold 1, and the support tray 2 with the coil 8 is placed in the lower mold, and the terminal 81 is abutted against the top wall of the lower mold; when the cylinder 14 is used to clamp the terminal 81 between the upper and lower molds, the support tray 2 is located in the installation space 15, and there is a gap between the support tray 2 and the upper and lower walls of the installation space 15, so that when material can be injected into the installation space 15 to vulcanize to form the coil 8 pad, the coil 8 is wrapped inside the coil 8 pad; the coil 8 pad adopts an integrated molding method to increase its sealing effect, reduce the occurrence of cracking of the coil 8 pad under long-term use, and improve the service life of the coil 8 pad.

[0040] The setting of the support tray 2 can support the coil 8, reduce the deformation or displacement of the coil 8 during the processing, and ensure the stability and accuracy of the coil 8 during the processing.

[0041] Embodiment 2: The embodiment of the present application discloses a coil 8 pad processing device.

[0042] Reference Figure 6 The difference between Example 2 of the present application and Example 1 is that it also includes a traction mechanism 4, which includes a mounting frame 41 fixed on the frame 11, a winding roller 42 rotatably mounted on the mounting frame 41, a traction rope 43 wound on the surface of the winding roller 42, and a servo motor 44 for driving the winding roller 42 to rotate, and one end of the traction rope 43 is fixed to the surface of the winding roller 42.

[0043] Reference Figure 7 and Figure 8 A guide tube 45 is fixed to the mounting ring 31, and a mounting tube 46 is fixed to the outer wall of the support plate 22. The free end of the traction rope 43 is sequentially passed through the guide tube 45, the mounting tube 46 and the end of the support plate 22 away from the support plate 21 and tied thereto; when the upper mold 12 and the lower mold 13 are buckled together, the upper mold is provided with a mounting groove 16 connected to the traction rope 43, and the traction rope 43 is inserted into the mounting groove 16; the setting of the mounting groove 16 can increase the smoothness of the servo motor 44 driving the traction rope 43 to slide.

[0044] Reference Figure 8 A guide plate 47 is formed on one side of the end of the support plate 22 away from the support plate 21, and the end of the guide plate 47 away from the support plate 22 is bent, and the traction rope 43 is tied to the side of the guide plate 47 away from the support plate 22. The setting of the guide plate 47 can make a gap between the traction rope 43 and the coil 8 to keep the coil 8 in normal use.

[0045] The implementation principle of Example 2 of the present application is: Before placing the support tray 2 with the coil 8 in the molding mold 1, first, the free end of the traction rope 43 is passed through the guide tube 45 and connected to the end of the support tray 2 away from the connecting component 3, and then the upper template and the lower template are buckled together to form a closed installation space 15, and then the servo motor 44 is driven to reel in the traction rope 43 so that the traction rope 43 is in a taut state; at this time, the traction rope 43 lifts the end of the support tray 2 away from the terminal 81 to provide additional supporting force for the support tray 2, thereby reducing the risk of deformation of the support tray 2 when carrying the coil 8, thereby reducing the possibility of the support tray 2 sinking due to its own gravity.

[0046] Embodiment 3: The embodiment of the present application discloses a coil 8 pad processing device.

[0047] Reference Fig. 9 The difference between Example 3 of the present application and Example 2 is that a detachable cutting block 5 is installed in the installation groove 16, and a rubber pad 51 is provided on the outer wall of the cutting block 5. The provision of the rubber pad 51 can increase the stability of the cutting block 5 installed in the installation groove 16.

[0048] The cutting block 5 is provided with a cutting hole 52 for the traction rope 43 to pass through, and the cutting hole 52 includes a first hole 521 and a second hole 522 connected to the first hole 521, and the outer diameter of the second hole 522 is larger than the inner diameter of the first hole 521; the traction rope 43 is passed through the first hole 521 and the second hole 522 in sequence; a tightening groove 523 is provided on the inner top wall of the second hole 522, and the extension direction of the tightening groove 523 is in the same direction as the extension direction of the second hole 522; a tightening block 53 is slidably installed in the tightening groove 523, and a spring 55 is provided between the tightening block 53 and the inner wall of the tightening groove 523, and the elastic force of the spring 55 is used to drive the tightening block 53 to move toward one side of the first hole 521.

[0049] The clamping block 53 is hinged with a clamping plate 54, the length of which is greater than the inner diameter of the second hole 522, and the end of the clamping plate 54 away from the clamping block 53 is inclined toward one side of the first hole 521; a torsion spring is provided at the hinge between the clamping plate 54 and the clamping block 53, and the elastic force of the torsion spring is used to drive the end of the clamping plate 54 away from the clamping block 53 to press against the bottom wall of the second hole 522, that is, to clamp the traction rope 43 between the clamping plate 54 and the bottom wall of the second hole 522.

[0050] The end of the clamping plate 54 away from the clamping block 53 is provided with a barb 57, and the barb 57 is used to increase the friction between the traction rope 43 and the clamping plate 54; when the power of the servo motor 44 is turned off, the setting of the barb 57 can reduce the free sliding of the traction rope 43 in the cutting hole 52 under the gravity of the supporting tray 2, so as to reduce the possibility of the servo motor 44 being turned on for a long time. Reference Fig.10In this embodiment, a detachable partition 7 is inserted into the second hole 522, and the partition 7 is used to drive the clamping plate 54 away from the end of the clamping block 53 to leave a gap between the bottom wall of the second hole 522, so as to facilitate the traction rope 43 to slide smoothly between the second holes 522.

[0051] Reference Fig. 9 and Fig.11 A cutting groove 524 is provided on the top wall of the first hole 521, and a cutting knife 56 is slidably installed in the cutting groove 524, and the cutting knife 56 is used to cut the traction rope 43; the cutting block 5 is provided with a movable component 6 for driving the cutting knife 56 to slide, and the movable component 6 includes a pull rod 62 and a gear 61. The cutting block 5 is provided with a driving groove 525 connected to the cutting groove 524 and the tightening groove 523. The gear 61 is rotatably installed in the driving groove 525, and the pull rod 62 is slidably installed in the cutting block 5. One end of the pull rod 62 is fixed to the tightening block 53, and the outer wall of the other end of the pull rod 62 is provided with a first tooth groove 63, and the outer wall of the cutting knife 56 is provided with a second tooth groove 64, and the first tooth groove 63 and the second tooth groove 64 are both meshed with the gear 61.

[0052] The implementation principle of Example 3 of the present application is: After the coil 8 is formed, the worker pulls the traction rope 43 toward the side away from the installation space 15; since the traction rope 43 is clamped between the clamping plate 54 and the bottom wall of the cutting hole 52, the clamping plate 54 can slide toward the side away from the installation space 15; since the pull rod 62 is connected to the clamping plate 54, the gear 61 can rotate under the engagement with the first tooth groove 63, so that the cutting knife 56 can slide to cut the traction rope 43.

[0053] When the pulling on the traction rope 43 is cancelled, the elastic force of the spring 55 can restore the clamping block 53 to its original state; since the traction rope 43 is clamped between the clamping plate 54 and the bottom wall of the cutting hole 52, the traction rope 43 can slide in the cutting hole 52 and protrude from the outer wall of the cutting hole 52, so that the staff can pull the traction rope 43 again to tie it to the support tray 2.

[0054] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A coil pad processing equipment, characterized in that: The invention comprises a forming mold (1) and a supporting tray (2), wherein the forming mold (1) comprises an upper mold (12) and a lower mold (13), wherein the upper mold (12) and the lower mold (13) are interlocked and combined to form an installation space (15), and a terminal (81) is clamped between the upper mold (12) and the lower mold (13); the supporting tray (2) is installed in the installation space (15), and one end of the supporting tray (2) is connected to the terminal (81) via a connecting component (3); and the coil (8) is placed in the supporting tray (2).

2. The coil pad processing equipment according to claim 1, characterized in that: The connection assembly (3) comprises a mounting ring (31) and a clamping block (32); the mounting ring (31) is sleeved on the outer wall of the terminal (81); the clamping block (32) is mounted on the support tray (2); and the mounting ring (31) is provided with a clamping groove (27) for the support tray (2) to be plugged in.

3. The coil pad processing equipment according to claim 2, characterized in that: The outer wall of the clamping block (32) is wrapped with a rubber layer.

4. The coil pad processing equipment according to claim 1, characterized in that: The invention also comprises a traction mechanism (4), wherein the traction mechanism (4) comprises a traction rope (43), a mounting frame (41), a winding roller (42) and a servo motor (44); the winding roller (42) is rotatably mounted on the mounting frame (41); and the servo motor (44) is used to drive the winding roller (42) to rotate; one end of the traction rope (43) is fixed to the winding roller (42); the connecting component (3) is provided with a guide tube (45); the other end of the traction rope (43) is passed through the guide tube (45) and is tied to an end of the support tray (2) away from the connecting component (3).

5. The coil pad processing equipment according to claim 4, characterized in that: The support tray (2) is integrally formed with a guide piece, and the traction rope (43) abuts against a side of the guide piece away from the support tray (2).

6. The coil pad processing equipment according to claim 4, characterized in that: The upper mold (12) is provided with an installation groove (16) connected to the installation space (15); a cutting block (5) is arranged in the installation groove (16); the cutting block (5) is provided with a cutting hole (52) for the traction rope (43) to pass through; a cutting knife (56) is movably installed in the cutting hole (52); and the cutting block (5) is provided with a movable component (6) for driving the cutting knife (56) to slide.

7. The coil pad processing equipment according to claim 6, characterized in that: A clamping block (53) is installed on the inner top wall of the cutting hole (52), and the clamping block (53) is located on the side of the cutting knife (56) away from the installation space (15); the clamping block (53) is hinged with a clamping plate (54), the length of the clamping block (53) is greater than the inner diameter of the cutting hole (52), and one end of the clamping plate (54) away from the clamping block (53) is inclined toward the side of the installation space (15); a torsion spring is provided at the hinge between the clamping plate (54) and the clamping block (53), and the elastic force of the torsion spring is used to clamp the traction rope (43) between the clamping plate (54) and the bottom wall of the cutting hole (52).

8. The coil pad processing equipment according to claim 7, characterized in that: The movable component (6) comprises a pull rod (62) and a gear (61); the cutting block (5) is provided with a driving groove (525); the gear (61) is rotatably mounted in the driving groove (525); the abutting block (53) is slidably mounted on the inner wall of the cutting hole (52); the pull rod (62) is slidably mounted on the cutting block (5) and connected to the abutting block (53); the pull rod (62) is provided with a first tooth groove (63); the side wall of the cutting blade (56) is provided with a second tooth groove (64); the first tooth groove (63) and the second tooth groove (64) are both meshed with the gear (61).

9. The coil pad processing equipment according to claim 8, characterized in that: The abutment plate (54) is arranged on a barb (57) for abutting against the cutting rope.

10. The coil pad processing equipment according to claim 8, characterized in that: A spring (55) is provided between the pull rod (62) and the cutting block (5), and the elastic force of the spring (55) is used to drive the abutting block (53) to move toward one side of the cutting knife (56).

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