Vehicle touch screen narrow frame machining device

Abstract

The invention discloses a vehicle touch screen narrow frame machining device, and relates to the technical field of metal cutting. The vehicle touch screen narrow frame machining device comprises a machining table, the top of the machining table is fixedly connected with a clamping mechanism, and the top of the machining table is fixedly connected with a cutting mechanism; the cutting mechanism comprises two moving blocks, and the two moving blocks are movably connected to the top of the machining table and located on the left side and the right side of the clamping mechanism. And the number of the fixed covers is two. According to the vehicle touch screen narrow frame machining device, a spiral plate is driven to rotate to generate airflow flowing towards the outer side, a baffle guides the airflow to the surface of a cutting tool and the surface of the narrow frame, the tool and a cutting piece are cooled, the situation that the cutting quality is affected due to the fact that the narrow frame becomes soft due to high temperature generated by cutting is avoided, and the rework condition is reduced; and the processing efficiency of the narrow frame of the touch screen is further improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cutting processing, in particular to a narrow-frame processing device for a touch screen for vehicles. BACKGROUND

[0002] The touch screen is an inductive liquid crystal display device capable of receiving input signals of a touch head and the like. An information transmission system with the touch screen as an interactive window can intuitively and visually transmit various information to people, thereby bringing great convenience to people's life. When the touch screen is processed, the touch screen is embedded and installed by using a touch screen frame. A narrow-frame processing device for a touch screen is disclosed in Chinese Patent Application No. 202420341776.9, which belongs to the technical field of touch screen frame processing and comprises a base, a first sliding rail arranged on the base, a first sliding block slidingly connected to the first sliding rail, an inner support positioning mechanism arranged on the first sliding block, an outer shell and a cover body of the inner support positioning mechanism, a positive and negative double-threaded screw rod rotatably connected to the outer shell, a nut seat arranged in different thread intervals of the positive and negative double-threaded screw rod, a bending support and a clamping piece arranged on the upper side of each of the two nut seats, and a narrow-frame body arranged on the two clamping pieces. When a large number of narrow frames are cut, the cutting tool is in a high-temperature state due to continuous processing, the tool in the high-temperature state softens the metal material of the narrow frame, affects the quality of the cutting surface, and causes the cut narrow frame to need to be reworked, thereby greatly affecting the processing speed of the narrow frame. SUMMARY

[0003] In view of the deficiencies of the prior art, the application provides a narrow-frame processing device for a touch screen for vehicles to solve the problems in the background art.

[0004] To achieve the above object, the application is implemented by the following technical scheme: a narrow-frame processing device for a touch screen for vehicles, comprising a processing table, a clamping mechanism fixedly connected to the top of the processing table, and a cutting mechanism fixedly connected to the top of the processing table. The cutting mechanism comprises: Two moving blocks are movably connected to the top of the processing table on the left and right sides of the clamping mechanism. Two fixed covers are fixedly connected to the top of the corresponding moving blocks. Two cutting knives are arranged in the corresponding fixed covers.

[0005] Preferably, the fixed cover is fixedly connected with a driving motor away from one side of the clamping mechanism, and the inside of the two fixed covers is movably connected with a fixed cylinder through a bearing, the inside of the fixed cylinder is fixedly connected with a spiral plate, the spiral plate is fixedly connected with the output shaft of the corresponding driving motor, and the cutting knife is fixedly connected with the fixed cylinder.

[0006] Preferably, the spiral plate is fixedly connected with a baffle away from one side of the clamping mechanism, the side of the baffle close to the driving motor is flush with the left side of the cutting knife, and the right side of the fixed cylinder is fixedly connected with a barrier net.

[0007] Preferably, the inside wall of the fixed cover is fixedly connected with a scraping plate at the right side of the corresponding barrier net, and the output shaft of the driving motor is fixedly connected with a poking protrusion at the corresponding position of the scraping plate.

[0008] Preferably, the scraping plate is elastic and can restore deformation after bending, and the poking protrusion can push the scraping plate when being driven to rotate by the driving motor, so that the scraping plate bends, and when the scraping plate is not pushed by the poking protrusion with the driving motor driving the poking protrusion to rotate, the scraping plate shakes and gradually restores deformation.

[0009] Preferably, the bottom of the fixed cover is movably connected with a collecting box away from one side of the clamping mechanism corresponding to the fixed cylinder, the bottom of the fixed cover is provided with a clamping groove corresponding to the collecting box, the collecting box is movably connected to the bottom of the corresponding fixed cover through the clamping groove, and the outer wall of the fixed cover is fixedly connected with a push plate inside the corresponding collecting box.

[0010] Preferably, the clamping mechanism comprises a fixed rod, the fixed rod is fixedly connected to the top of the machining table, the fixed rod is located between the two moving blocks, the outer side of the fixed rod is fixedly connected with two electric telescopic rods, and one end of the two electric telescopic rods away from the fixed rod is fixedly connected with a clamping head.

[0011] Preferably, the outer wall of the fixed rod is fixedly connected with two extension sleeves, the inside of the two extension sleeves is movably connected with an active rod, and one end of the two active rods away from the fixed rod is fixedly connected with a support plate.

[0012] Preferably, the outer wall of the active rod is fixedly connected with a spring, the other end of the spring connected with the active rod is fixedly connected with the extension sleeve, and when the active rod is pushed to the side of the fixed rod, the spring is pulled up.

[0013] Preferably, the inside of the fixed cover is fixedly connected with a pushing frame inside the cutting knife, the position of the pushing frame corresponds to that of the support plate, the two ends of the pushing frame are provided with arc edges matched with the support plate, and the two sides of the support plate are provided with arc edges matched with the pushing frame.

[0014] The application provides a narrow frame processing device for vehicle touch screen, relates to metal cutting technology, and has the following beneficial effects. 1. The narrow frame processing device for vehicle touch screen drives rotation of the spiral plate to generate airflow flowing outward, the baffle guides the airflow to the surface of the cutting tool and the surface of the narrow frame, cools the tool and the cutting piece, avoids high temperature generated by cutting from softening the narrow frame and affecting the cutting quality, reduces the occurrence of rework, and further improves the processing efficiency of the narrow frame of the touch screen.

[0015] 2. The narrow frame processing device for vehicle touch screen sucks the cutting debris into the fixed cover through the action of the airflow, and makes the debris adhere to one side of the blocking net, and collects the metal debris into the collection box through the action of the scraping plate and the push plate, saves the processing time of the processing waste, and further improves the processing efficiency of the narrow frame.

[0016] 3. The narrow frame processing device for vehicle touch screen clamps and fixes the narrow frame blank through the two clamping heads, makes the narrow frame located on the top of the two supporting plates, can support the two cutting edges of the narrow frame blank, avoids wall deformation caused by cutting due to softening of the narrow frame under heating, further reduces the occurrence of rework, and further improves the processing efficiency of the narrow frame.

[0017] 4. The narrow frame processing device for vehicle touch screen pushes the burrs generated at the bottom of the narrow frame outward through the spring pushing the supporting plate, and the cutting tool polishes the pushed burrs, thereby improving the quality of the cutting surface, reducing the processing time of the burrs, and indirectly improving the processing efficiency of the narrow frame.

[0018] 5. The narrow frame processing device for vehicle touch screen sucks the burrs polished by cutting into the fixed cover, and under the interception of the blocking net, avoids the discharge of the debris to the outside, and finally makes the burr debris enter the collection box, so that the burr debris and the cutting debris are collected together, the waste is reused, the waste processing time is saved, and the processing efficiency of the narrow frame is indirectly improved.

[0019] 6. The narrow frame processing device for vehicle touch screen generates suction airflow on the top of the collection net through the discharge of the gas in the negative pressure box, the airflow drags the splashed cutting debris to the top of the collection net, the sweeping plate is driven to sweep the debris into the collection groove, avoids too much debris from accumulating in the processing area, saves the cleaning time of the processing table, and indirectly improves the processing efficiency of the narrow frame. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a front perspective structure schematic diagram of the application. Figure 2 It isFigure 1 Enlarged structural schematic view of middle A part; Figure 3 Enlarged structural schematic view of middle A part; Figure 4 Enlarged structural schematic view of middle A part; Figure 3 Enlarged structural schematic view of middle B part; Figure 5 Enlarged structural schematic view of middle B part; Figure 6 Enlarged structural schematic view of middle B part; Figure 7 Enlarged structural schematic view of middle B part; Figure 6 Enlarged structural schematic view of middle E part; Figure 8 Enlarged structural schematic view of middle E part; Figure 9 Enlarged structural schematic view of middle E part; Figure 3 Enlarged structural schematic view of middle C part; Figure 10 Enlarged structural schematic view of middle C part; Figure 5 Enlarged structural schematic view of middle D part.

[0021] In the figure: 1, processing table; 2, cutting mechanism; 201, moving block; 202, fixed cover; 203, driving motor; 204, fixed cylinder; 205, cutting knife; 206, baffle; 207, barrier net; 208, scraping plate; 209, poking convex; 210, collection box; 211, spiral plate; 212, push plate; 3, clamping mechanism; 301, fixed rod; 302, electric telescopic rod; 303, clamping head; 304, extension sleeve; 305, movable rod; 306, spring; 307, support plate; 308, pushing frame; 4, collection mechanism; 401, collection net; 402, negative pressure box; 403, exhaust fan; 404, collection groove; 405, sweeping plate. DETAILED DESCRIPTION

[0022] 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 some of the embodiments of the present application, not all the embodiments.

[0023] Examples of the described embodiments are shown in the drawings, in which the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0024] Embodiment one: please refer to Figures 1-8The application provides a technical scheme: a narrow-frame processing device for a vehicle touch screen, comprising a processing table 1, a clamping mechanism 3 fixedly connected to the top of the processing table 1, and a cutting mechanism 2 fixedly connected to the top of the processing table 1. The cutting mechanism 2 comprises: Two moving blocks 201 are arranged on the left and right sides of the clamping mechanism 3 on the top of the processing table 1. Two fixed covers 202 are arranged on the top of the corresponding moving blocks 201. Two cutting knives 205 are arranged in the corresponding fixed covers 202.

[0025] The embryo of the narrow frame is clamped and fixed by the clamping mechanism 3, and after being fixed firmly, the cutting knives 205 are driven to rotate by the driving motors 203 and are moved on the top of the processing table 1 by the moving blocks 201, so as to drive the rotating cutting knives 205 to move and cut the edges of the narrow frame, so that the two cutting knives 205 simultaneously cut along the two edges of the narrow frame embryo, so that the final forming size of the narrow frame meets the required size, and after cutting, the clamping mechanism 3 releases the clamping of the narrow frame and removes the processed piece.

[0026] The cutting knives 205 need to be driven to rotate to cut the narrow frame embryo, and the driving motors 203 are fixedly connected to the side of the fixed cover 202 away from the clamping mechanism 3, the fixed cylinders 204 are movably connected to the inside of the two fixed covers 202 through bearings, the spiral plates 211 are fixedly connected to the inside of the fixed cylinders 204, the spiral plates 211 are fixedly connected with the output shafts of the corresponding driving motors 203, and the cutting knives 205 are fixedly connected with the fixed cylinders 204.

[0027] The driving motors 203 drive the spiral plates 211 to rotate through the output shafts, and drive the fixed cylinders 204 to rotate through the spiral plates 211, so that the cutting knives 205 are driven to rotate to cut the narrow frame embryo.

[0028] A large amount of heat is generated during cutting, and the heat can be dissipated by using a flowing air flow to flow through the cutting position, the side of the spiral plate 211 close to the clamping mechanism 3 is fixedly connected with a baffle 206, the side of the baffle 206 close to the driving motor 203 is flush with the left side of the cutting knife 205, and the right side of the fixed cylinder 204 is fixedly connected with a blocking net 207.

[0029] When the spiral plate 211 is driven to rotate, it will push the airflow inside the fixed cylinder 204 outward. The baffle 206 will block and guide the exhaust airflow, so that the airflow flows around the cutting knife 205. The airflow can cool the cutting knife 205, and at the same time, the airflow will flow to the narrow frame to cool it, avoiding stress deformation of the narrow frame due to cutting heat.

[0030] In addition, since the fixed cover 202 is in communication with the inside of the fixed cylinder 204, when the spiral plate 211 inside the fixed cylinder 204 pushes the exhaust airflow, it will generate suction airflow at the gap between the fixed cover 202 and the fixed cylinder 204. This will cause the suction airflow to suck the cutting debris into the fixed cover 202 during cutting, avoiding the cutting debris flying around the processing area, and the blocking net 207 will filter the airflow to avoid some metal debris impurities in the airflow blowing towards the cutting knife 205, which will affect the cutting.

[0031] The continuous filtering of the blocking net 207 will cause too much impurity to accumulate on one side of the cutting knife 205, affecting the gas flow of the blocking net 207. The inner wall of the fixed cover 202 on the right side corresponding to the blocking net 207 is fixedly connected with a scraping plate 208. The output shaft of the driving motor 203 is fixedly connected with a poking protrusion 209 at a position corresponding to the scraping plate 208.

[0032] The scraping plate 208 is elastic and can recover after bending. When the poking protrusion 209 is driven to rotate by the driving motor 203, it will push the scraping plate 208 to bend. When the driving motor 203 drives the poking protrusion 209 to rotate, the scraping plate 208 will vibrate and gradually recover when it is not pushed by the poking protrusion 209.

[0033] The blocking net 207 will be driven to rotate by the driving motor 203 together with the fixed cylinder 204. Since the fixed cover 202 is in a relatively static state relative to the baffle 206, the scraping plate 208 will produce the effect of scraping the outside of the blocking net 207 when the blocking net 207 rotates, avoiding blockage of the blocking net 207. During the rotation of the output shaft of the driving motor 203, the poking protrusion 209 will be driven to rotate, which will push the scraping plate 208 to vibrate, causing the attached matter on the surface of the scraping plate 208 to be shaken off, which helps to reduce the impurities attached to the scraping plate 208 and improves the effect of the scraping plate 208 continuously scraping the blocking net 207.

[0034] The metal scraps are collected inside the fixed cover 202. Due to continuous accumulation, it is necessary to clean it to avoid continuous accumulation affecting cutting processing. The bottom of the fixed cover 202 is movably connected with a collecting box 210 on the side away from the clamping mechanism 3 corresponding to the fixed cylinder 204. The bottom of the fixed cover 202 is provided with a clamping groove corresponding to the collecting box 210. The collecting box 210 is movably connected to the bottom of the corresponding fixed cover 202 through the clamping groove. The outer wall of the fixed cover 202 is fixedly connected with a push plate 212 on the inner side corresponding to the collecting box 210.

[0035] When the scraping plate 208 vibrates, some metal scraps will fall down. When the fixed cylinder 204 rotates, the push plate 212 will push the metal scraps to the place where the collecting box 210 is located. The slag is pushed into the collecting box 210 under the action of gravity. The collected scraps in the collecting box 210 can be processed by taking the collecting box 210 out of the clamping groove at the bottom of the fixed cover 202.

[0036] Embodiment two: please refer to Figures 1-8 On the basis of embodiment one, the application provides a technical solution: The narrow frame blank needs to be fixed before cutting to avoid disturbance of the narrow frame during cutting and affect the forming quality. The clamping mechanism 3 includes a fixed rod 301 fixedly connected to the top of the machining table 1. The fixed rod 301 is located between the two moving blocks 201. Two electric telescopic rods 302 are fixedly connected to the outside of the fixed rod 301. The ends of the two electric telescopic rods 302 away from the fixed rod 301 are fixedly connected with clamping heads 303.

[0037] Place the narrow frame blank in the corresponding position, extend the two electric telescopic rods 302, and clamp and fix the narrow frame blank through the two clamping heads 303 to facilitate cutting of the narrow frame blank.

[0038] The touch screen narrow frame is a thin-walled structure. When cutting, it is supported to avoid excessive deformation caused by cutting. The outer wall of the fixed rod 301 is fixedly connected with two extension sleeves 304. The inner sides of the two extension sleeves 304 are movably connected with movable rods 305. The ends of the two movable rods 305 away from the fixed rod 301 are fixedly connected with support plates 307.

[0039] The two support plates 307 can support the two cutting edges of the narrow frame blank to avoid wall deformation caused by cutting due to softening of the narrow frame.

[0040] The fixed cutting knife 205 is fixed in the feeding direction during rotation cutting, and the rotation direction of the cutting knife 205 is limited, so that the burrs generated by the narrow frame are mainly generated on the bottom surface during cutting, and too many burrs will affect the final forming quality, the outer wall of the movable rod 305 is fixedly connected with the spring 306, one end of the spring 306 connected with the movable rod 305 is fixedly connected with the extension sleeve 304, and the movable rod 305 is pushed to the side where the fixed rod 301 is located, so that the spring 306 is pulled up.

[0041] The inside of the fixed cover 202 is fixedly connected with the pushing frame 308 inside the cutting knife 205, the pushing frame 308 and the supporting plate 307 correspond to each other in position, and the two ends of the pushing frame 308 are provided with arc edges matched with the supporting plate 307.

[0042] During cutting, the fixed cover 202 is moved by the moving block 201, the fixed cover 202 pushes the corresponding pushing frame 308 to move, so that the pushing frame 308 contacts and gradually pushes the supporting plate 307 through the corresponding arc edges, and then pushes the movable rod 305, so that the spring 306 is pulled up, along with the movement of the fixed cover 202, the narrow frame blank is cut, when the pushing frame 308 moves away from one side of the supporting plate 307, the supporting plate 307 will be reset under the pushing of the spring 306, and the supporting plate 307 will push the burrs generated at the bottom of the narrow frame outward during the outward movement and reset, and then the moving block 201 drives the fixed cover 202 to reset to the original position, and the cutting knife 205 will polish the pushed burrs during the movement of the fixed cover 202, thereby improving the quality of the cutting surface.

[0043] In addition, after the burrs are returned and rotated and polished by the cutting knife 205, the burr debris generated will be sucked into the fixed cover 202 by the airflow, and will be intercepted by the blocking net 207 to avoid being discharged to the outside, and will be pushed into the collecting box 210 by the pushing plate 212, so that the burr debris and the cutting debris are collected together, and the waste can be reused.

[0044] Embodiment three: please refer to Figures 1-10 On the basis of the first and second embodiments, the application provides a technical solution: The collecting mechanism 4 comprises a collecting net 401 fixedly connected inside the processing table 1 at the bottom of the clamping mechanism 3, and the bottom of the processing table 1 is fixedly connected with a negative pressure box 402 at the bottom of the collecting net 401, four exhaust fans 403 are fixedly connected to the outer wall of the negative pressure box 402, a sweeping plate 405 is fixedly connected inside the processing table 1 at the top of the collecting net 401, the bottom of the sweeping plate 405 is provided with a brush, the left and right ends of the sweeping plate 405 are respectively fixedly connected with two moving blocks 201, and the front and back surfaces of the bottom of the processing table 1 are movably connected with collecting grooves 404.

[0045] The exhaust fan 403 is started, the exhaust fan 403 can exhaust the air inside the negative pressure box 402, so that the negative pressure is formed in the negative pressure box 402, and then the airflow at the top of the collecting net 401 is inhaled into the negative pressure box 402, so that the cuttings splashed in the direction of the clamping mechanism 3 during cutting of the cutting knife 205 are dragged by the airflow at the top of the collecting net 401 and are adsorbed on the top of the collecting net 401, and when the two moving blocks 201 move along the top of the processing table 1 to cut the narrow frame, the sweeping plate 405 is driven to move back and forth on the top of the collecting net 401, and the cuttings on the top of the collecting net 401 are swept into the collecting groove 404, and when too many cuttings are accumulated in the collecting groove 404, the collecting groove 404 can be taken off from the bottom of the processing table 1, the impurities in the collecting groove 404 are treated, and too many cuttings are prevented from being accumulated in the processing area.

[0046] The above merely describes the preferred specific embodiments of the present application, but the protection scope of the present application is not limited to this, and any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A device for processing a narrow frame of a touch screen for a vehicle, comprising a processing table (1), characterized in that: The top of the processing table (1) is fixedly connected to a clamping mechanism (3), and the top of the processing table (1) is fixedly connected to a cutting mechanism (2); The cutting mechanism (2) comprises: A moving block (201), wherein two moving blocks (201) are provided, and the two moving blocks (201) are movably connected to the top of the processing table (1) and are located on the left and right sides of the clamping mechanism (3); A fixed cover (202), wherein two fixed covers (202) are provided, and the two fixed covers (202) are respectively fixedly connected to the top of the corresponding moving block (201); The cutting knives (205) are provided with two cutting knives (205), and the two cutting knives (205) are respectively provided inside the corresponding fixed covers (202).

2. The device for processing a narrow border of a vehicle touch screen according to claim 1, characterized in that: The fixed cover (202) is fixedly connected to a drive motor (203) on one side away from the clamping mechanism (3). The interiors of the two fixed covers (202) are movably connected to a fixed cylinder (204) via a bearing. The interiors of the fixed cylinders (204) are fixedly connected to a spiral plate (211). The spiral plates (211) are respectively fixedly connected to the output shafts of the corresponding drive motors (203). The cutting blade (205) is fixedly connected to the fixed cylinder (204).

3. The device for processing a narrow border of a vehicle touch screen according to claim 2, characterized in that: The side of the spiral plate (211) close to the clamping mechanism (3) is fixedly connected to a baffle (206), the side of the baffle (206) close to the drive motor (203) is flush with the left side of the cutting knife (205), and the right side of the fixed cylinder (204) is fixedly connected to a barrier net (207).

4. The device for processing a narrow border of a vehicle touch screen according to claim 2, characterized in that: The inner wall of the fixed cover (202) is located on the right side of the corresponding barrier net (207) and is fixedly connected to a scraping plate (208). The output shaft of the drive motor (203) is located at a position corresponding to the scraping plate (208) and is fixedly connected to a toggle protrusion (209).

5. The device for processing a narrow border of a vehicle touch screen according to claim 4, characterized in that: The scraper plate (208) has elasticity and can recover its deformation after being bent. The toggling protrusion (209) will have the effect of toggling the scraper plate (208) when being driven to rotate by the driving motor (203), causing the scraper plate (208) to bend. As the driving motor (203) drives the toggling protrusion (209) to rotate, the scraper plate (208) will shake and gradually recover its deformation when it is not pushed by the toggling protrusion (209).

6. The device for processing a narrow border of a vehicle touch screen according to claim 1, characterized in that: The bottom of the fixed cover (202) is located on a side of the corresponding fixed cylinder (204) away from the clamping mechanism (3) and is movably connected to a collection box (210). A card slot corresponding to the collection box (210) is provided at the bottom of the fixed cover (202). The collection box (210) is movably connected to the bottom of the corresponding fixed cover (202) through the card slot. The outer wall of the fixed cover (202) is located on the inner side of the corresponding collection box (210) and is fixedly connected to a push plate (212).

7. The device for processing a narrow border of a vehicle touch screen according to claim 1, characterized in that: The clamping mechanism (3) comprises a fixed rod (301), the fixed rod (301) being fixedly connected to the top of the processing table (1), the fixed rod (301) being located between the two moving blocks (201), the fixed rod (301) being externally fixedly connected to two electric telescopic rods (302), and the ends of the two electric telescopic rods (302) away from the fixed rod (301) being fixedly connected to a clamping head (303).

8. The device for processing a narrow border of a vehicle touch screen according to claim 7, characterized in that: Two extension sleeves (304) are fixedly connected to the outer wall of the fixed rod (301), and movable rods (305) are movably connected inside the two extension sleeves (304). The ends of the two movable rods (305) away from the fixed rod (301) are fixedly connected to a support plate (307).

9. The device for processing a narrow border of a vehicle touch screen according to claim 8, characterized in that: The outer wall of the movable rod (305) is fixedly connected to a spring (306), and the other end of the spring (306) connected to the movable rod (305) is fixedly connected to the extension sleeve (304). When the movable rod (305) is pushed toward the side where the fixed rod (301) is located, the spring (306) is pulled up.

10. The device for processing a narrow border of a vehicle touch screen according to claim 7, characterized in that: A push frame (308) is fixedly connected to the inside of the fixed cover (202) and located inside the cutting knife (205). The positions of the push frame (308) and the support plate (307) correspond to each other. Both ends of the push frame (308) have arc edges that cooperate with the support plate (307), and both sides of the support plate (307) are provided with arc edges that cooperate with the push frame (308).

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