Wire winding machine capable of setting quantitative resistance

Abstract

The utility model discloses a wire winding machine capable of setting quantitative resistance, and particularly relates to the technical field of wire winding machines, the wire winding machine comprises a workbench and a wire winding rod, the top of the workbench is provided with a support plate, two sides of the top of the support plate are respectively provided with a coil rack reel, one side of each coil rack reel is provided with a guide wheel, one side of the support plate is provided with a measuring and conveying device, and the measuring and conveying device is provided with a measuring and conveying device. Through the cutting mechanism and the fixing assembly, the cutter is attached to the inclined face so that the cutter can be matched with a wound wire, the cutter can be inserted into a gap of the wound wire so that the cutter can be cut off, burrs can be reduced, the production quality of products can be improved, the cutter guide column can be conveniently and rapidly disassembled or assembled, and when the cutter guide column is abraded, the cutter guide column can be conveniently and rapidly disassembled or assembled. Disassembly, assembly, replacement and use are convenient, the angle can be conveniently determined, and practicability is higher; and through the use of a stop lever and a moving block, the push handle can be limited, the situation that the fixing effect on the cutter guide column is affected by accidental touch is avoided, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of wire winding machines, in particular to a wire winding machine capable of setting a quantitative resistance. Background Technique

[0002] The resistance wire is made of an alloy wire with a relatively large resistance. This wire can gradually change the resistance connected to the circuit by changing its position, thereby changing the magnitude of the current in the circuit. The resistance wire is an important part of the circuit. Its main function is to reduce the intensity of the current in the circuit to protect electronic components from being burned by excessive current. At the same time, it can also play a role in adjusting the magnitude of the current in signal processing. The alloy wire used to make the resistance wire needs to be processed by a wire winding machine during the production process. According to the movement states of the wire and the wire winding rod, the wire winding process of the wire winding machine can be divided into two categories: The first is that the wire winding rod is relatively stationary, and the wire rotates spirally along the length direction of the wire winding rod; the second is that one end of the wire is fixed on the wire winding rod, and the wire winding rod rotates spirally in one direction.

[0003] Currently, during the processing of alloy wires by most wire winding machines, after winding the alloy wires, they will be cut off by a cutting structure. Most wire winding machines are equipped with a cutting tool guide post that cooperates with the cutting tool. However, most of the existing wire winding machine cutting tool guide posts have no angle, which will cause a lot of burrs at the end of the cut product, and there will be 5% flash, thus affecting the quality of the product. Moreover, when the cutting tool guide post is worn and damaged after long-term use and needs to be disassembled, maintained, and replaced, it is inconvenient to disassemble and assemble, and its practicability is relatively poor. Content of the Utility Model

[0004] The purpose of the utility model is to provide a wire winding machine capable of setting a quantitative resistance to solve the problems raised in the above background technique.

[0005] To solve the above technical problems, the present utility model provides the following technical solutions: A wire winding machine with a settable quantitative resistance, including a workbench and a wire winding rod. A support plate is provided on the top of the workbench. On both sides of the top of the support plate, a coil holder reel is provided respectively. A guide wheel is installed on one side of the coil holder reel. A measuring and conveying device is provided on one side of the support plate. On one side of the top of the workbench, there is a first support rod, and a through hole is opened on one side of the first support rod. On the side of the first support rod on the top of the workbench, there is a linear module. The top of the sliding block on the linear module is connected to a sliding seat. On one side of the top of the sliding seat, there is a driving motor. The output end of the driving motor is connected to a three-jaw chuck through a linkage shaft. On the side of the first support rod on the top of the workbench away from the linear module, there is a cutting mechanism. The cutting mechanism includes a cutting seat, and the cutting seat is arranged on one side of the first support rod. The bottom of the cutting seat is fixedly connected to the top of the workbench through a second support rod. A lead screw is rotatably installed between the second support rod and the first support rod, and a slide rod is provided above the lead screw. One end of the lead screw is connected to a servo motor on one side of the first support rod. A push plate is sleeved outside the lead screw and the slide rod.

[0006] Further, the cutting mechanism further includes a fixed block. On one side of the fixed block, a mounting plate is fixedly installed. On one side of the upper part of the mounting plate, there is a first cylinder. The output end of the first cylinder is connected to a first sliding seat. On one side of the mounting plate, a limiting frame is symmetrically provided, and the limiting frame is sleeved outside the first sliding seat. A first slider is provided at the bottom of the first sliding seat. A first sliding groove adapted to the first slider is opened on the side wall of the mounting plate. On one side of the first sliding seat, there is a second cylinder. The telescopic end of the second cylinder is connected to a second sliding seat. A second slider is connected to one side of the second sliding seat. A second sliding groove adapted to the second slider is opened on one side of the first sliding seat. A connecting shaft is rotatably installed on one side of the second sliding seat, and a cutting knife is connected to one end of the connecting shaft. A washer is sleeved outside the connecting shaft between the cutting knife and the second sliding seat. On one side of the cutting seat, there is a cutting knife guide post, and one end of the cutting knife guide post has an inclined surface. The cutting knife is attached to and parallel to the inclined surface at one end of the cutting knife guide post. Through holes are opened at the corresponding positions of the cutting seat, the fixed block, the mounting plate, and the cutting knife guide post. A fixing component connected to the cutting knife guide post is provided in the cutting seat. One end of the wire winding rod is connected to the three-jaw chuck and the other end passes through the through hole. A U-shaped groove is opened at one end of the wire winding rod. Through the cutting mechanism, it is convenient to cut the wound alloy wire, and the cutting accuracy is higher, improving the quality of the product and avoiding burrs on the product caused by cutting.

[0007] Further, the fixing component includes a fixing rod, and the fixing rods are symmetrically arranged at one end of the cutter guide post. A chamber is formed inside the cutter seat, and adjusting grooves are symmetrically formed on the inner wall of one side of the chamber. One end of the fixing rod is inserted into a slot formed on the side wall of the cutter seat, and the slot communicates with the adjusting groove. A guide rod is fixedly installed inside the chamber, and clamping rods are symmetrically sleeved outside the guide rod, and one end of each clamping rod extends into the adjusting groove. Corresponding positions on the opposite outer side walls of the two fixing rods are respectively provided with clamping grooves adapted to the clamping rods. One ends of the two clamping rods are jointly and movably connected with a connecting sleeve through a connecting rod. A push rod is arranged on one side of the cutter seat, and the connecting sleeve is sleeved outside one end of the push rod. One end of the push rod is connected with a push handle outside the cutter seat. A spring is sleeved between the two clamping rods on the outside of the guide rod. Through the fixing component, the cutter guide post can be disassembled or installed conveniently and quickly so as to replace it, which is convenient to use.

[0008] Further, a guide groove is formed above the push rod on one side of the cutter seat, and a moving block is slidably installed in the guide groove. One side of the moving block is connected with a stop rod, one end of the stop rod abuts against one side of the push handle, and a pull ring is connected to the top of the stop rod.

[0009] Further, the included angle between the inclined surface on one side of the cutter guide post and the vertical direction is 3 degrees. The mounting plate is inclined, the cutter is attached to the inclined surface, and the mounting plate, the first sliding seat and the second sliding seat are all parallel to the inclined surface, so as to assist the cutter to insert into the gap of the wound wire, thereby better cutting and processing it and reducing the generation of burrs.

[0010] Further, the two ends of the connecting rod are respectively hinged to the clamping rod and the connecting sleeve, the two ends of the spring are respectively fixedly connected to the two clamping rods, the stop rod and the moving block are combined into a T shape, and the guide groove is adapted to the combined structure of the stop rod and the moving block, so as to transmit power, and the guide groove can guide and limit the stop rod and the moving block.

[0011] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0012] Through the cutting mechanism and the fixing component of the present utility model, the cutter is attached to the inclined surface so as to adapt it to the wound wire, and the cutter is inserted into the gap of the wound wire for cutting and processing, reducing the generation of burrs, improving the production quality of the product, and the cutter guide post can be disassembled or installed conveniently and quickly, so that when it is worn, it is convenient to disassemble, install and replace, which is convenient to use, and it is convenient to determine its angle, and the practicability is stronger;

[0013] By using the stop rod and the moving block, the present utility model can limit the push handle to avoid accidental touch from affecting the fixing effect of the cutter guide post, which is convenient to use. Description of the Drawings

[0014] The accompanying drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0015] Figure 1 is a schematic structural diagram of the whole of the present utility model;

[0016] Figure 2 is a schematic structural diagram between the clamping rod, the fixed rod and the cutting seat of the present utility model;

[0017] Figure 3 is a schematic structural diagram between the cutting tool guide post and the fixed rod of the present utility model;

[0018] Figure 4 is a schematic structural diagram between the stop rod and the moving block of the present utility model;

[0019] Figure 5 is the present utility model Figure 1 an enlarged schematic structural diagram of A therein;

[0020] In the figure: 1, workbench; 2, support plate; 3, measuring and conveying device; 4, coil holder reel; 5, guide wheel; 6, first support rod; 7, linear module; 8, sliding seat; 9, drive motor; 10, three-jaw chuck; 11, second support rod; 12, lead screw; 13, servo motor; 14, push plate; 15, sliding rod; 16, cutting seat; 17, cutting tool guide post; 18, fixed block; 19, mounting plate; 20, first cylinder; 21, first sliding seat; 22, limiting frame; 23, first slider; 24, second cylinder; 25, second sliding seat; 26, second slider; 27, cutting tool; 28, fixed rod; 29, guide rod; 30, clamping rod; 31, connecting rod; 32, connecting sleeve; 33, push rod; 34, spring; 35, stop rod; 36, moving block. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Such as Figure 1 - Figure 5A wire winding machine with a quantitatively settable resistance, as shown, includes a workbench 1 and a wire winding rod. On the top of the workbench 1, there is a support plate 2. On both sides of the top of the support plate 2, there is a coil holder reel 4 respectively. On one side of the coil holder reel 4, there is a guide wheel 5 installed. On one side of the support plate 2, there is a measuring and conveying device 3. In this example, the measuring and conveying device 3 is a structure in the existing technology in this aspect, which is composed of multiple guide wheels to convey the alloy wire. Since the structures of the wire materials are different, the resistance values they carry are different. Therefore, only by measuring and understanding the resistance value of the corresponding alloy wire and measuring and conveying a fixed length of the alloy wire as needed, the resistance value of the alloy wire can be kept constant within the set range, that is, the resistance of the processed alloy wire is quantitatively set. On one side of the top of the workbench 1, there is a first support rod 6, and there is a through hole on one side of the first support rod 6. On one side of the first support rod 6 on the top of the workbench 1, there is a linear module 7. The top of the sliding block on the linear module 7 is connected to a sliding seat 8. On one side of the top of the sliding seat 8, there is a driving motor 9. The output end of the driving motor 9 is connected to a three-jaw chuck 10 through a linkage shaft. On the side of the first support rod 6 on the top of the workbench 1 away from the linear module 7, there is a cutting mechanism. In this example, the linear module 7 is prior art and is used to convey the driving motor 9 left and right. The cutting mechanism includes a cutting seat 16, and the cutting seat 16 is arranged on one side of the first support rod 6. The bottom of the cutting seat 16 is fixedly connected to the top of the workbench 1 through a second support rod 11. A lead screw 12 is rotatably installed between the second support rod 11 and the first support rod 6, and there is a slide bar 15 above the lead screw 12. One end of the lead screw 12 is connected to a servo motor 13 on one side of the first support rod 6. A push plate 14 is sleeved outside the lead screw 12 and the slide bar 15. In this example, there is a receiving groove adapted to the push plate 14 on one side of the first support rod 6.

[0023] In this example, the cutting mechanism further includes a fixed block 18. On one side of the fixed block 18, a mounting plate 19 is fixedly installed. On one side of the upper part of the mounting plate 19, a first cylinder 20 is provided. The output end of the first cylinder 20 is connected to a first sliding seat 21. On one side of the mounting plate 19, two limiting frames 22 are symmetrically arranged, and the limiting frames 22 are sleeved outside the first sliding seat 21. At the bottom of the first sliding seat 21, a first slider 23 is provided. A first chute adapted to the first slider 23 is formed in the side wall of the mounting plate 19. On one side of the first sliding seat 21, a second cylinder 24 is provided. The telescopic end of the second cylinder 24 is connected to a second sliding seat 25. On one side of the second sliding seat 25, a second slider 26 is connected. A second chute adapted to the second slider 26 is formed on one side of the first sliding seat 21. On one side of the second sliding seat 25, a connecting shaft is rotatably installed, and one end of the connecting shaft is connected to a cutter 27. A washer is sleeved on the outside of the connecting shaft between the cutter 27 and the second sliding seat 25. On one side of the cutting seat 16, a cutter guide post 17 is provided, and one end of the cutter guide post 17 is provided with an inclined surface. The cutter 27 is attached to and parallel to the inclined surface at one end of the cutter guide post 17. Perforations are formed at the corresponding positions of the cutting seat 16, the fixed block 18, the mounting plate 19, and the cutter guide post 17. A fixing component connected to the cutter guide post 17 is provided inside the cutting seat 16. One end of the winding lead screw is connected to the three-jaw chuck 10, and the other end passes through the through hole. A U-shaped groove is formed at one end of the winding lead screw. In this example, the U-shaped groove is provided to limit one end of the alloy wire, facilitating its winding. Through the cutting mechanism, the wound alloy wire can be conveniently cut, and the cutting accuracy is higher, improving the product quality and avoiding burrs on the product caused by cutting. In this example, the fixing component includes fixing rods 28, and the fixing rods 28 are symmetrically arranged at one end of the cutter guide post 17. A chamber is formed inside the cutting seat 16. Adjusting grooves are symmetrically formed on the inner wall of one side of the chamber. One end of the fixing rod 28 is inserted into a slot formed in the side wall of the cutting seat 16, and the slot communicates with the adjusting groove. A guide rod 29 is fixedly installed in the chamber. Clamping rods 30 are symmetrically sleeved on the outside of the guide rod 29, and one end of the clamping rod 30 extends into the adjusting groove. Corresponding positions on the opposite outer side walls of the two fixing rods 28 are each provided with a card slot adapted to the clamping rod 30. In this example, a mark is provided on the top surface of the upper fixing rod 28 to more easily identify the installation angle of the cutter guide post 17 and avoid incorrect installation. In this example, the mark can be set according to actual needs and is not drawn in this example. One ends of the two clamping rods 30 are jointly and movably connected to a connecting sleeve 32 through a connecting rod 31. A push rod 33 is provided on one side of the cutting seat 16. The connecting sleeve 32 is sleeved on the outside of one end of the push rod 33. One end of the push rod 33 is connected to a push handle outside the cutting seat 16. A spring 34 is sleeved on the outside of the guide rod 29 between the two clamping rods 30. Through the fixing component, the cutter guide post 17 can be conveniently and quickly disassembled or installed for replacement, which is convenient to use. In this example, a guide groove is formed on one side of the cutting seat 16 above the push rod 33. A moving block 36 is slidably installed in the guide groove. One side of the moving block 36 is connected to a stop rod 35. One end of the stop rod 35 abuts against one side of the push handle. A pull ring is connected to the top of the stop rod 35 to limit the push rod 33 and avoid accidental touching and pushing the push rod 33 to move, affecting the fixing effect of the cutter guide post 17.In this example, the included angle between the inclined surface on one side of the cutter guide post 17 and the vertical direction is 3 degrees. The mounting plate 19 is inclined. The cutter 27 is in contact with the inclined surface. The mounting plate 19, the first sliding seat 21 and the second sliding seat 25 are all parallel to the inclined surface, so as to assist the cutter 27 to insert into the gap of the wire winding, so as to better cut it and reduce the generation of burrs. In this example, the two ends of the connecting rod 31 are respectively hinged to the clamping rod 30 and the connecting sleeve 32. The two ends of the spring 34 are respectively fixedly connected to the two clamping rods 30. The stop rod 35 and the moving block 36 are combined into a T shape. The guide groove is adapted to the combined structure of the stop rod 35 and the moving block 36, so as to transmit power. The guide groove can guide and limit the stop rod 35 and the moving block 36.

[0024] The working principle of the present utility model: When in use, the coil holder reel 4 is used to release the alloy wire, and the metal is conveyed in cooperation with the measuring conveying device 3. Then one end of the alloy wire is inserted into the U-shaped groove. The driving motor 9 is started to drive the three-jaw chuck 10 and then drive the wire winding rod to rotate, so as to wind the alloy wire. At the same time, the linear module 7 is used to drive the sliding seat 8 to drive the driving motor 9 and the wire winding rod to move, so as to realize continuous winding processing of the alloy wire. After the winding is completed, one end of the alloy wire is removed from the U-shaped groove, and then the linear module 7 is used to drive the sliding seat 8 to drive the driving motor 9 and then pull the wire winding rod to reset. At the same time, the servo motor 13 is started to drive the lead screw 12 to rotate, so that the lead screw 12 drives the push plate 14 to move along the slide bar 15, and the push plate 14 pushes the wound alloy wire through the through hole. Then the cylinder two 24 is started to push the second sliding seat 25 to drive the cutter 27 to move down, so that the cutter 27 is inserted into the gap of the wound wire, so as to cut it, avoiding burrs at the cutting place and improving the production quality. When the cutter guide post 17 needs to be disassembled, the pull ring is pulled to drive the stop rod 35 to drive the moving block 36 to slide in the guide groove. Then the push handle is pushed to drive the push rod 33, so that the push rod 33 drives the connecting sleeve 32, and then the connecting rod 31 is pushed, so that the connecting rod 31 drives the clamping rod 30 to slide along the guide rod 29. At the same time, the clamping rod 30 will stretch the spring 34, so that one end of the clamping rod 30 that is stuck in the card slot is removed. Then the cutter guide post 17 is pulled to drive the fixing rod 28 to pull it out, and the disassembly of it can be completed. During installation, the above steps can be repeated to move the clamping rod 30 to the relative outside of the slot. Then after the fixing rod 28 is inserted into the slot, the force applied to the push handle is released, so that the clamping rod 30 moves in the reset under the elastic force of the spring 34, so that the clamping rod 30 is stuck in the card slot on the fixing rod 28, realizing the fixation of the fixing rod 28 and completing the installation of the cutter guide post 17. Then the force applied to the pull ring is released, so that it moves down in the reset under its own gravity, so that the stop rod 35 moves between the cutting seat 16 and the push handle, realizing the limit fixation of the push handle, so as to avoid accidental touch affecting the fixing effect of the cutter guide post 17, which is convenient to use and has stronger practicability.

[0025] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A wire winding machine capable of setting a quantitative resistance, comprising a workbench (1) and a wire winding rod, wherein a support plate (2) is provided on the top of the workbench (1), a coil frame reel (4) is provided on both sides of the top of the support plate (2), a guide wheel (5) is installed on one side of the coil frame reel (4), and a measuring conveying device (3) is provided on one side of the support plate (2), characterized in that: A support rod (6) is provided on one side of the top of the workbench (1), and a through hole is provided on one side of the support rod (6). A linear module (7) is provided on one side of the support rod (6) on the top of the workbench (1). A sliding seat (8) is connected to the top of the sliding block on the linear module (7). A driving motor (9) is provided on one side of the top of the sliding seat (8). The output end of the driving motor (9) is connected to a three-jaw chuck (10) via a linkage shaft. A cutting mechanism is provided on the side of the support rod (6) on the top of the workbench (1) away from the linear module (7). The cutting mechanism comprises a cutting seat (16), and the cutting seat (16) is arranged on one side of the support rod (6). The bottom of the cutting seat (16) is fixedly connected to the top of the workbench (1) through the support rod (11). A screw rod (12) is rotatably installed between the support rod (11) and the support rod (6), and a sliding rod (15) is arranged above the screw rod (12). One end of the screw rod (12) is connected to a servo motor (13) on one side of the support rod (6). A push plate (14) is sleeved on the outside of the screw rod (12) and the sliding rod (15).

2. A wire winding machine capable of setting a quantitative resistance according to claim 1, characterized in that: The cutting mechanism further comprises a fixed block (18), a mounting plate (19) being fixedly mounted on one side of the fixed block (18), a cylinder (20) being arranged on one side of the upper part of the mounting plate (19), an output end of the cylinder (20) being connected to a slide seat (21), a limit frame (22) being symmetrically arranged on one side of the mounting plate (19), and the limit frame (22) being sleeved on the outer side of the slide seat (21), a slide seat (23) being arranged at the bottom of the slide seat (21), a slide groove (23) being arranged on the side wall of the mounting plate (19), a cylinder (24) being arranged on one side of the slide seat (21), a telescopic end of the cylinder (24) being connected to a slide seat (25), a slide seat (26) being connected to one side of the slide seat (25), and a slide seat (21) being arranged on one side. A second slide groove adapted to the second slide block (26) is provided. A connecting shaft is rotatably mounted on one side of the second slide block (25), and a cutter (27) is connected to one end of the connecting shaft. A gasket is sleeved on the outer side of the connecting shaft between the cutter (27) and the second slide block (25). A cutter guide column (17) is provided on one side of the cutting seat (16), and an inclined surface is provided at one end of the cutter guide column (17). The cutter (27) is fitted with and parallel to the inclined surface of one end of the cutter guide column (17). Through holes are provided at corresponding positions of the cutting seat (16), the fixing block (18), the mounting plate (19) and the cutter guide column (17). A fixing component connected to the cutter guide column (17) is provided in the cutting seat (16). One end of the wire winding rod is connected to the three-jaw chuck (10), and the other end passes through the through hole. A U-shaped groove is provided at one end of the wire winding rod.

3. A wire winding machine capable of setting a quantitative resistance according to claim 2, characterized in that: The fixing assembly comprises a fixing rod (28), and the fixing rod (28) is symmetrically arranged at one end of the cutter guide column (17); a chamber is provided inside the cutting seat (16), and an inner wall on one side of the chamber is symmetrically provided with an adjustment groove; one end of the fixing rod (28) is inserted into a slot provided on the side wall of the cutting seat (16), and the slot is communicated with the adjustment groove; a guide rod (29) is fixedly installed in the chamber, and a clamping rod (30) is symmetrically sleeved on the outer side of the guide rod (29), and one end of the clamping rod (30) extends into the adjustment groove, and two The fixing rod (28) is provided with a slot adapted to the clamping rod (30) at a corresponding position on the opposite outer side wall. One end of the two clamping rods (30) are respectively connected to a connecting sleeve (32) through a connecting rod (31) for joint movement. A push rod (33) is provided on one side of the cutting seat (16). The connecting sleeve (32) is sleeved on the outside of one end of the push rod (33). One end of the push rod (33) is connected to a push handle outside the cutting seat (16). A spring (34) is sleeved between the two clamping rods (30) on the outside of the guide rod (29).

4. A wire winding machine capable of setting a quantitative resistance according to claim 3, characterized in that: A guide groove is formed on one side of the cutting seat (16) above the push rod (33), a moving block (36) is slidably mounted in the guide groove, a stop rod (35) is connected to one side of the moving block (36), one end of the stop rod (35) contacts one side of the push handle, and a pull ring is connected to the top of the stop rod (35).

5. A wire winding machine capable of setting a quantitative resistance according to claim 2, characterized in that: The angle between the inclined surface on one side of the cutter guide column (17) and the vertical direction is 3 degrees, the mounting plate (19) is inclined, the cutter (27) is in contact with the inclined surface, and the mounting plate (19), the first slide seat (21) and the second slide seat (25) are all parallel to the inclined surface.

6. A wire winding machine capable of setting a quantitative resistance according to claim 4, characterized in that: The two ends of the connecting rod (31) are respectively hinged to the clamping rod (30) and the connecting sleeve (32); the two ends of the spring (34) are respectively fixedly connected to the two clamping rods (30); the blocking rod (35) and the moving block (36) are combined to form a T shape; and the guide groove is adapted to the combined structure of the blocking rod (35) and the moving block (36).

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