Blanket lustring device

Abstract

The utility model relates to a blanket lustring device which comprises a bottom plate, a guide roller is rotationally arranged on the top face of the side edge of the bottom plate through a support, a winding mechanism is arranged on the top face of the other side of the bottom plate, a lustring mechanism is arranged between the guide roller and the winding mechanism, and the lustring mechanism comprises a fixing frame, a lustring roller assembly and a lifting assembly. The fixing frame is fixedly arranged on the top face of the bottom plate, a control unit is fixedly arranged on the side edge of the fixing frame, the lustring roller assembly detects the temperature of the lustring roller assembly and feeds the temperature back to the control unit, and the control unit sends an adjusting instruction to the lustring roller assembly so as to change the temperature of the lustring roller assembly. According to the ironing device, the temperature of the ironing roller assembly is dynamically changed, so that different ironing temperatures needed by blankets with different thicknesses are met, and the practicability of the ironing device is improved.

Description

Technical Field

[0001] The present application relates to the field of blanket processing and production, and in particular to a blanket ironing device. Background Art

[0002] Raschel blankets are of the best quality among blankets. Raschel fabric itself is also a kind of blanket that is comfortable, breathable and warm. Raschel blankets need to be ironed during the production process. The surface of the fabric after being ironed by the ironing machine is fluffy, thick, full of fluff, straight and shiny, comparable to natural fabrics.

[0003] In the related art, a Chinese utility model patent with the authorization number CN211283102U discloses a gas ironing machine for blanket production, comprising a carrier plate, a side edge of the upper surface of the carrier plate is rotatably connected to a guide roller through a bracket, a winding device is arranged on the other side edge of the upper surface of the carrier plate, two ends of a U-shaped frame are fixedly connected to the upper surface of the carrier plate, two ends of the ironing roller are respectively rotatably connected to two opposite inner sides of the U-shaped frame, and a tensioning device is fixedly connected to the upper surface of the carrier plate, so that the blanket can always be in tension contact with the ironing roller to ensure the efficiency of ironing.

[0004] However, blankets of different thicknesses require different ironing temperatures. In the above solution, the ironing roller cannot change the ironing temperature to adapt to blankets of different thicknesses, and the position of the ironing roller on the U-shaped frame is fixed. Blankets of a certain thickness cannot pass through the gap between the U-shaped frame and the ironing roller, and the ironing operation of blankets of different thicknesses cannot be met, so the practicality is low. Utility Model Content

[0005] In order to meet the ironing operation requirements of blankets of different thicknesses and improve the practicability of the ironing device, the present application provides a blanket ironing device.

[0006] The blanket ironing device provided in this application adopts the following technical solution:

[0007] A blanket ironing device comprises a bottom plate, wherein a guide roller is rotatably provided on the top surface of a side edge of the bottom plate through a bracket, a winding mechanism is provided on the top surface of the other side of the bottom plate, an ironing mechanism is provided between the guide roller and the winding mechanism, and the ironing mechanism comprises a fixed frame, an ironing roller assembly and a lifting assembly, wherein the fixed frame is fixedly provided on the top surface of the bottom plate, a control unit is fixedly provided on the side edge of the fixed frame, a slide groove is provided on the inner side of the opposite surface of the fixed frame, a lifting assembly is provided in the slide groove, an ironing roller assembly is rotatably provided on the lifting assembly, the lifting assembly drives the ironing roller assembly to move up and down in the vertical direction of the fixed frame, the ironing roller assembly detects its own temperature and feeds back to the control unit, and the control unit sends an adjustment instruction to the ironing roller assembly to change the temperature of the ironing roller assembly itself.

[0008] By adopting the above technical solution, the operator places the fluffy side of the blanket on the ironing roller, adjusts the position of the blanket to a suitable position through the lifting assembly, heats the ironing roller with the heating rod, detects the temperature of the ironing roller through the temperature sensing element, and feeds back to the control unit, and the control unit adjusts the temperature of the heating rod so that the temperature of the ironing roller reaches the specified temperature to adapt to the different temperatures required for ironing blankets of different thicknesses.

[0009] Optionally, the ironing roller assembly includes an ironing roller, a temperature sensing element and a heating rod. The ironing roller is rotatably arranged on the lifting assembly. The temperature sensing element is fixedly provided on the side wall of the ironing roller. The temperature sensing element is electrically connected to the control unit. The inner cavity of the ironing roller is fixedly provided with a heating rod, and the heating rod is electrically connected to the control unit.

[0010] By adopting the above technical solution, the temperature sensing element detects the temperature of the ironing roller and sends it to the control unit. The control unit compares the detected data with the set data and sends an adjustment instruction to the heating rod. The heating rod adjusts its own temperature to change the temperature of the ironing roller.

[0011] Optionally, the lifting assembly includes a screw rod, a guide rod, a worm gear, a sliding block and a driving component, the sliding block is slidably arranged in a sliding groove, the sliding block is rotatably connected to the polishing roller, the screw rod penetrates the sliding block and is rotatably connected to the sliding block, the screw rod is axially perpendicular to the top surface of the base plate, a guide rod is provided on one side of the screw rod, the guide rod penetrates the sliding block and is slidably connected to the sliding block, the guide rod is axially parallel to the screw rod, the end of the screw rod away from the base plate is coaxially connected to the worm gear, the worm gear is meshingly connected to the driving component, and the driving component is fixed on the top of the fixed frame.

[0012] By adopting the above technical solution, the driving component provides driving force, the driving component drives the worm wheel to rotate, and the worm wheel drives the screw to rotate, thereby driving the sliding block to rise and fall along the screw axis under the limit of the limit rod, thereby driving the connected ironing roller to rise and fall.

[0013] Optionally, the driving component includes a double-headed worm, a driven wheel, a driving wheel and a driving motor, the double-headed worm being rotatably arranged in the inner cavity at the top of the fixed frame, the axial direction of the double-headed worm being perpendicular to the axial direction of the lead screw, the helical teeth at both ends of the double-headed worm respectively meshing with the worm wheel, the middle section of the double-headed worm is drivingly connected to the driven wheel, the driven wheel is sleeved on the middle section of the double-headed worm, the driven wheel meshes with the driving wheel, the driving wheel is drivingly connected to the driving motor, and the driving motor is fixed on the top of the fixed frame.

[0014] By adopting the above technical solution, the driving motor drives the driving wheel to rotate, and the driving wheel drives the meshing driven wheel to rotate, so that the driven wheel drives the double-headed worm to rotate.

[0015] Optionally, a cooling mechanism is fixedly provided on one side of the fixed frame close to the winding mechanism, and the cooling mechanism includes a cooling frame and a cooling roller. The cooling frame is fixed on a side plate of the fixed frame, and a cooling roller is rotatably provided on the cooling frame, and the cooling roller rolls on the blanket.

[0016] By adopting the above technical solution, the blanket that has been ironed by the ironing roller passes through the cooling roller to cool the fluff, thereby improving the ironing effect of the blanket.

[0017] Optionally, the winding mechanism includes a fixed plate, a flap plate, a winding roller and a driving motor, the fixed plate is fixed on one side of the top surface of the base plate in the length direction, the other side of the top surface of the base plate in the length direction is fixedly provided with a flap plate, the fixed plate and the flap plate on opposite sides are rotatably connected to the winding roller, the flap plate is provided with a rotating hole, one end of the winding roller is rotatably connected in the rotating hole, the other end of the winding roller is rotatably connected to a rotator, one end of the rotator is connected to the winding roller, the other end of the rotator passes through the fixed plate and is connected to the winding motor, and the winding motor is fixed on one side of the fixed plate.

[0018] By adopting the above technical solution, the fixed plate and the flip cover plate fix the winding roller on the bottom plate, the driving motor drives the winding roller to rotate, and one end of the blanket is wound around the winding roller, thereby driving the blanket to move.

[0019] Optionally, the flip plate includes an upper plate, a lower plate, a hinge and a fixing assembly, the upper end of the lower plate is rotatably connected to the upper plate via a hinge, the upper plate and the lower plate are connected in a cover-like manner to form a flip plate, the flip plate forms a rotating hole when covered, and a fixing assembly is provided at the connection between the upper plate and the lower plate.

[0020] By adopting the above technical solution, the flap plate is connected in a cover-like manner through the hinge, and the flap design facilitates the taking-up and placing of the winding roller.

[0021] Optionally, the fixing component includes an upper magnetic sheet and a lower magnetic sheet, the upper magnetic sheet is fixed on one side of the upper plate, the lower magnetic sheet is fixed on one side of the lower plate, and the upper magnetic sheet and the lower magnetic sheet are close to each other to achieve the effect of fixing the upper plate and the lower plate.

[0022] By adopting the above technical solution, when the upper and lower plates are close to each other, the upper magnetic sheet and the lower magnetic sheet are magnetically attracted together to achieve the effect of fixing the upper and lower plates. When the upper and lower plates need to be separated, a certain force is used to separate the upper and lower magnetic sheets so that the upper and lower plates are away from each other.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The temperature of the ironing roller is detected by the temperature sensing element and fed back to the control unit. The control unit adjusts the temperature of the ironing roller to the specified temperature, thereby meeting the different ironing temperatures required for blankets of different thicknesses and improving the practicality of the ironing device;

[0025] 2. The lifting component adjusts the position of the ironing roller by lifting and lowering to adjust the tension of blankets of different thicknesses and improve the ironing effect;

[0026] 3. The winding mechanism is operated by flipping the cover plate, which is convenient for installing and removing the winding roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The utility model is a schematic diagram of the overall structure of a blanket ironing device.

[0028] Figure 2 The figure is a top view of a blanket ironing device.

[0029] Figure 3 yes Figure 2 Sectional view of AA.

[0030] Figure 4 It is an exploded view of the lifting assembly of a blanket ironing device, used to show the internal structure of the lifting assembly.

[0031] Figure 5 The present invention is a partial structural schematic diagram of a blanket ironing device.

[0032] Figure 6 The invention discloses a structural diagram of a winding mechanism of a blanket ironing device.

[0033] Description of reference numerals: 1, bottom plate; 2, guide roller; 3, ironing mechanism; 31, fixed frame; 311, slide groove; 32, ironing roller assembly; 321, ironing roller; 322, temperature sensing element; 323, heating rod; 33, lifting assembly; 331, screw rod; 332, guide rod; 333, worm gear; 334, sliding block; 335, driving component; 3351, double-headed worm; 3352, driven wheel; 3353 , driving wheel; 3354, driving motor; 4, control unit; 5, cooling mechanism; 51, cooling rack; 52, cooling roller; 6, winding mechanism; 61, fixed plate; 62, flip plate; 621, upper plate; 622, lower plate; 623, hinge; 624, fixed component; 6241, upper magnetic sheet; 6242, lower magnetic sheet; 63, winding roller; 64, winding motor; 65, rotating hole; 66, rotator. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-6 This application is described in further detail.

[0035] The embodiment of the present application discloses a blanket ironing device.

[0036] Reference Figure 1A blanket ironing device comprises a bottom plate 1, a guide roller 2 is provided on the top surface of the side of the bottom plate 1 through a bracket, a winding mechanism 6 is provided on the top surface of the other side of the bottom plate 1, and a ironing mechanism 3 is provided between the guide roller 2 and the winding mechanism 6. After the blanket passes through the guide roller, it enters the ironing mechanism 3 for ironing and is finally wound on the winding mechanism 6;

[0037] The ironing mechanism 3 includes a fixed frame 31, an ironing roller assembly 32 and a lifting assembly 33. The fixed frame 31 is fixed on the top surface of the bottom plate 1. A control unit 4 is fixed on the side of the fixed frame 31. A slide groove 311 is provided on the inner side of the opposite surface of the fixed frame 31. The lifting assembly 33 is provided in the slide groove 311. The ironing roller assembly 32 is rotatably provided on the lifting assembly 33. The lifting assembly 33 drives the ironing roller assembly 32 to move up and down in the vertical direction of the fixed frame 31, so as to adjust the tension of blankets with different thicknesses. The ironing roller assembly 32 is electrically connected to the control unit 4. The ironing roller assembly 32 detects its own temperature and feeds it back to the control unit 4. The control unit 4 sends an adjustment instruction to the ironing roller assembly 32 to change the temperature of the ironing roller assembly 32 itself to adapt to different ironing temperatures required for blankets with different thicknesses.

[0038] Reference Figure 2 and Figure 3 The ironing roller assembly 32 includes an ironing roller 321, a temperature sensing element 322 and a heating rod 323. The ironing roller 321 is rotatably arranged on the lifting assembly 33. The lifting assembly 33 drives the ironing roller 321 to move up and down in its vertical direction. The temperature sensing element 322 is fixedly arranged on the side wall of the ironing roller 321. The temperature sensing element 322 is electrically connected to the control unit 4. The temperature sensing element 322 detects the temperature of the ironing roller 321 and sends it to the control unit 4. A heating rod 323 is fixedly arranged in the inner cavity of the ironing roller 321. The heating rod 323 is electrically connected to the control unit 4. The control unit 4 sends an adjustment instruction to the heating rod 323, so that the heating rod 323 changes its own heating temperature, thereby changing the temperature of the ironing roller 321.

[0039] Reference Figure 3 and Figure 4The lifting assembly 33 includes a screw rod 331, a guide rod 332, a worm gear 333, a sliding block 334 and a driving component 335. The sliding block 334 is slidably arranged in the sliding groove 311. The two sliding blocks 334 are respectively rotatably connected to the two ends of the ironing roller 321. The screw rod 331 and the guide rod 332 respectively penetrate the sliding block 334 and are rotatably connected to the sliding block 334. The screw rod 331 and the guide rod 332 are arranged parallel to each other. The axes of the screw rod 331 and the guide rod 332 are perpendicular to each other. On the top surface of the bottom plate 1, the slider moves up and down in the axial direction of the screw rod 331 under the limit of the guide rod 332. The end of the screw rod 331 away from the bottom plate 1 is coaxially connected to the worm gear 333. The worm gear 333 is coaxially sleeved on the end of the screw rod 331 away from the bottom plate 1. The worm gear 333 is meshed and connected to the driving component 335. The driving component 335 includes a double-headed worm 3351, a driven wheel 3352, a driving wheel 3353 and a driving motor 3354. The double-headed worm 3351 rotates The double-headed worm 3351 is arranged in the inner cavity at the top of the fixed frame 31, the axial direction of the double-headed worm 3351 is perpendicular to the axial direction of the screw rod 331, the spiral teeth at both ends of the double-headed worm 3351 are respectively meshed with the worm wheel 333, the middle section of the double-headed worm 3351 is connected to the driven wheel 3352, the driven wheel 3352 is sleeved on the middle section of the double-headed worm 3351, the driven wheel 3352 is meshed with the driving wheel 3353, the driving wheel 3353 is connected to the driving motor 3354, and the driving motor 3354 is fixed At the top of the fixed frame 31, the driving motor 3354 drives the driving wheel 3353 to rotate, and the driving wheel 3353 drives the driven wheel 3352 to rotate, thereby driving the double-headed worm 3351 to rotate, and the double-headed worm 3351 drives the worm wheels 333 at both ends to rotate, and the worm wheels 333 at both ends respectively drive the sleeved screw rods 331 to rotate, and the rotation of the screw rod 331 drives the sliding block 334 to move up and down, thereby driving the ironing roller 321 connected to the sliding block 334 to move up and down.

[0040] Reference Figure 5 The cooling mechanism 5 includes a cooling frame 51 and a cooling roller 52. The cooling frame 51 is fixed on the side plate of the fixed frame 31. The cooling roller 52 is rotatably provided on the cooling frame 51. The cooling roller 52 rolls on the blanket. The cooling roller 52 cools the blanket after ironing to prevent the blanket from deformation and improve the ironing effect of the blanket.

[0041] Reference Figure 6The winding mechanism 6 includes a fixed plate 61, a flap plate 62, a winding roller 63 and a winding motor 64. The fixed plate 61 is fixedly arranged on one side of the top surface of the bottom plate 1 in the length direction, and the flip plate 62 is fixedly arranged on the other side of the top surface of the bottom plate 1 in the length direction. The opposite side of the fixed plate 61 and the flip plate 62 is rotatably connected to the winding roller 63. The flip plate 62 is provided with a rotating hole 65. One end of the winding roller 63 is rotatably connected in the rotating hole 65. The other end of the winding roller 63 is rotatably connected to the rotator 66. One end of the rotator 66 is connected to the winding roller 63. The other end of the rotator 66 passes through the fixed plate 61 and is connected to the winding motor 64. The winding motor 64 is fixed on one side of the fixed plate 61. The rotator 66 serves as a transfer device for the winding motor 64. The winding motor 64 drives the rotator 66 to rotate, thereby driving the winding roller 63 to rotate. The flip plate 62 includes an upper plate 621, a lower plate 622, a hinge 623 and a fixed component 624. The upper end of the lower plate 622 is rotatably connected to the upper plate 621 through the hinge 623. The upper plate 621 and the lower plate 622 are connected in a cover-type manner to form a flip plate 62. The flip plate 62 is covered to form a rotating hole 65, and a fixing component 624 is provided at the connection between the upper plate 621 and the lower plate 622. The fixing component 624 includes an upper magnetic sheet 6241 and a lower magnetic sheet 6242. The upper magnetic sheet 6241 is fixed on one side of the upper plate 621, and the lower magnetic sheet 6242 is fixed on one side of the lower plate 622. The upper magnetic sheet 6241 and the lower magnetic sheet 6242 are close to each other to achieve the effect of fixing the upper plate 621 and the lower plate 622. When the winding roller 63 needs to be removed, one end of the winding roller 63 is removed from the rotator 66, and the winding roller The other end of 63 needs to be removed from the flip cover plate 62, the upper plate 621 of the flip cover plate 62 is opened, and one end of the winding roller 63 is taken out. When the winding roller 63 needs to be placed, one end of the winding roller 63 is installed on the rotator 66, and the other end of the winding roller 63 is placed in the groove of the lower plate 622, and the upper plate 621 is flipped, and the upper magnetic sheet 6241 and the lower magnetic sheet 6242 are magnetically attracted to each other to fix the upper plate 621 and the lower plate 622. At this time, the other end of the winding roller 63 is rotatably set in the rotating hole 65 formed after the upper plate 621 and the lower plate 622 are covered.

[0042] The implementation principle of a blanket ironing device in the embodiment of the present application is:

[0043] The operator sets the ironing temperature in the control unit 4, and then winds one end of the blanket around the winding roller 63 through the ironing roller 321 and the cooling roller 52, and then adjusts the lifting assembly 33 to move the ironing roller 321 to a suitable position, so that the blanket is in a tensioned state, and then starts the heating rod 323 to heat the ironing roller 321. The temperature sensing element 322 on the ironing roller 321 detects the temperature of the ironing roller 321 and feeds it back to the control unit 4. The control unit 4 compares the detected temperature with the set temperature, and then sends an adjustment instruction to the heating rod 323 to change the heating temperature of the heating rod 323, so that the temperature of the ironing roller 321 reaches the specified temperature. The blanket after the ironing operation is cooled by the cooling roller 52 and then wound around the winding roller 63. When the ironing operation of the blanket is completed, the upper plate 621 of the flip plate 62 is opened, and the winding roller 63 is taken out, thereby completing the winding of the ironed blanket.

[0044] The above are all 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 blanket ironing device, characterized in that: The invention comprises a bottom plate (1), a guide roller (2) is rotatably provided on the top surface of the side of the bottom plate (1) through a bracket, a winding mechanism (6) is provided on the top surface of the other side of the bottom plate (1), a polishing mechanism (3) is provided between the guide roller (2) and the winding mechanism (6), the polishing mechanism (3) comprises a fixing frame (31), a polishing roller assembly (32) and a lifting assembly (33), the fixing frame (31) is fixedly provided on the top surface of the bottom plate (1), a control unit (4) is fixedly provided on the side of the fixing frame (31), and the fixing frame (31) is provided with a plurality of rollers (32) and a plurality of rollers (33). ) is provided with a slide groove (311) on the inner side of the opposite surface, and a lifting component (33) is provided in the slide groove (311). A polishing roller component (32) is rotatably provided on the lifting component (33). The lifting component (33) drives the polishing roller component (32) to move up and down in the vertical direction of the fixed frame (31). The polishing roller component (32) detects its own temperature and feeds it back to the control unit (4). The control unit (4) sends an adjustment instruction to the polishing roller component (32) so as to change the temperature of the polishing roller component (32).

2. A blanket ironing device according to claim 1, characterized in that: The ironing roller assembly (32) comprises an ironing roller (321), a temperature sensing element (322) and a heating rod (323); the ironing roller (321) is rotatably arranged on the lifting assembly (33); a temperature sensing element (322) is fixedly arranged on the side wall of the ironing roller (321); the temperature sensing element (322) is electrically connected to the control unit (4); a heating rod (323) is fixedly arranged in the inner cavity of the ironing roller (321); and the heating rod (323) is electrically connected to the control unit (4).

3. A blanket ironing device according to claim 2, characterized in that: The lifting assembly (33) comprises a screw rod (331), a guide rod (332), a worm gear (333), a sliding block (334) and a driving component (335); the sliding block (334) is slidably disposed in the sliding groove (311); the sliding block (334) is rotatably connected to the ironing roller (321); the screw rod (331) passes through the sliding block (334) and is rotatably connected to the sliding block (334); the screw rod (331) is axially perpendicular to the top of the bottom plate (1) A guide rod (332) is provided on one side of the screw rod (331), the guide rod (332) passes through the sliding block (334) and is slidably connected to the sliding block (334), the guide rod (332) is axially parallel to the screw rod (331), one end of the screw rod (331) away from the bottom plate (1) is coaxially connected to a worm gear (333), the worm gear (333) is meshingly connected to a driving component (335), and the driving component (335) is fixedly arranged on the top of the fixing frame (31).

4. A blanket ironing device according to claim 3, characterized in that: The driving component (335) comprises a double-headed worm (3351), a driven wheel (3352), a driving wheel (3353) and a driving motor (3354); the double-headed worm (3351) is rotatably arranged in the inner cavity at the top of the fixed frame (31); the axial direction of the double-headed worm (3351) is perpendicular to the axial direction of the lead screw (331); the helical teeth at both ends of the double-headed worm (3351) respectively mesh with the worm wheel (333); the middle section of the double-headed worm (3351) is drivingly connected to the driven wheel (3352); the driven wheel (3352) is sleeved on the middle section of the double-headed worm (3351); the driven wheel (3352) meshes with the driving wheel (3353); the driving wheel (3353) is drivingly connected to the driving motor (3354); and the driving motor (3354) is fixedly arranged on the top of the fixed frame (31).

5. A blanket ironing device according to claim 4, characterized in that: A cooling mechanism (5) is fixedly provided on one side of the fixed frame (31) close to the winding mechanism (6), the cooling mechanism (5) comprising a cooling frame (51) and a cooling roller (52), the cooling frame (51) being fixedly provided on a side plate of the fixed frame (31), the cooling roller (52) being rotatably provided on the cooling frame (51), and the cooling roller (52) rolling on the blanket.

6. A blanket ironing device according to claim 5, characterized in that: The winding mechanism (6) comprises a fixed plate (61), a flap plate (62), a winding roller (63) and a winding motor (64); the fixed plate (61) is fixedly arranged on one side of the top surface of the bottom plate (1) in the length direction; the flap plate (62) is fixedly arranged on the other side of the top surface of the bottom plate (1) in the length direction; the fixed plate (61) and the flap plate (62) are rotatably connected to the winding roller (63) on one side opposite to the flap plate (62); the flap plate (62) is provided with a rotating hole (65); one end of the winding roller (63) is rotatably connected in the rotating hole (65); the other end of the winding roller (63) is rotatably connected to a rotator (66); one end of the rotator (66) is connected to the winding roller (63); the other end of the rotator (66) passes through the fixed plate (61) and is connected to the winding motor (64); the winding motor (64) is fixedly arranged on one side of the fixed plate (61).

7. A blanket ironing device according to claim 6, characterized in that: The flip plate (62) comprises an upper plate (621), a lower plate (622), a hinge (623) and a fixing assembly (624); the upper end of the lower plate (622) is rotatably connected to the upper plate (621) via the hinge (623); the upper plate (621) and the lower plate (622) are connected in a cover-like manner to form a flip plate (62); the flip plate (62) forms a rotation hole (65) when covered; a fixing assembly (624) is provided at the connection between the upper plate (621) and the lower plate (622).

8. A blanket ironing device according to claim 7, characterized in that: The fixing component (624) comprises an upper magnetic sheet (6241) and a lower magnetic sheet (6242); the upper magnetic sheet (6241) is fixedly arranged on one side of the upper plate (621); the lower magnetic sheet (6242) is fixedly arranged on one side of the lower plate (622); the upper magnetic sheet (6241) and the lower magnetic sheet (6242) are close to each other to achieve the effect of fixing the upper plate (621) and the lower plate (622).

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