CN220280241U - Film production cooling setting device - Google Patents
Film production cooling setting device Download PDFInfo
- Publication number
- CN220280241U CN220280241U CN202321570203.5U CN202321570203U CN220280241U CN 220280241 U CN220280241 U CN 220280241U CN 202321570203 U CN202321570203 U CN 202321570203U CN 220280241 U CN220280241 U CN 220280241U
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- box
- shaping
- cooling
- template
- film production
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- 238000001816 cooling Methods 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000007493 shaping process Methods 0.000 claims abstract description 59
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 21
- 229910052802 copper Inorganic materials 0.000 claims description 21
- 239000010949 copper Substances 0.000 claims description 21
- 238000009434 installation Methods 0.000 claims description 9
- 239000004922 lacquer Substances 0.000 claims 1
- 239000002985 plastic film Substances 0.000 abstract description 38
- 229920006255 plastic film Polymers 0.000 abstract description 38
- 239000000110 cooling liquid Substances 0.000 abstract description 26
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract description 4
- 238000007654 immersion Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002826 coolant Substances 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000004321 preservation Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model discloses a film production cooling shaping device, which relates to the technical field of plastic film production, and comprises a shaping box, wherein an immersion assembly is arranged in the shaping box, the immersion assembly comprises a template and a driving assembly, the template is fixedly arranged at the top end of the shaping box, a transmission screw rod is rotationally connected between the template and the shaping box through a sealing bearing, and the surface of the transmission screw rod is in threaded connection with a first transverse plate through a screw rod nut; the beneficial effects of the utility model are as follows: the plastic film passes through the gap between the L-shaped plate and the liquid level of the cooling liquid, the transmission screw rod rotates reversely to finally drive the two guide rollers to move downwards, and the two guide rollers push the plastic film to move downwards, so that the plastic film is immersed in the cooling liquid, the cooling liquid is very convenient, the plastic film can be wound on the surfaces of the two guide rollers without discharging the cooling liquid, and the working efficiency is improved.
Description
Technical Field
The utility model relates to a cooling shaping device, in particular to a cooling shaping device for film production, and belongs to the technical field of plastic film production.
Background
In the production process of the plastic film, a film bubble is formed when the plastic melt is extruded from a die of a blow molding machine, the film bubble is further blown up to form the plastic film, the film is solidified and molded after being cooled, and finally the film is rolled by a rolling shaft, so that the shrinkage rate of the plastic film is more stable, the surface is smoother, before the rolling, the plastic film is heated and stretched by a shaping device, and then is cooled after being stretched, and the cooling process after the heating is called a cooling shaping process.
The shaping device of the plastic film production equipment disclosed by the application number CN200920263198.7 comprises a heating box and a cooling device, wherein the two side walls of the heating box are respectively formed by meshing and splicing a front part and a rear part, and the splicing parts of the front part and the rear part of each side wall are respectively toothed; the front half parts of the two side walls and the front wall are connected into a whole to form a front unit, and the rear half parts of the two side walls and the rear wall are connected into a whole to form a rear unit; and a driving mechanism for driving the front unit or the rear unit to move back and forth along the track; the front unit and the rear unit of the heating box are respectively provided with a plurality of horizontal metal rollers, and the metal rollers of the front unit and the rear unit are vertically arranged at intervals. The utility model can heat a plastic film in a relatively sealed space, and can lead the plastic film to continuously bend and pass through a plurality of metal rollers in the space, thereby improving the shaping quality of the plastic film, and the utility model is found by further searching that the 'gas-liquid cooling film shaping device for film production' disclosed by the application number of CN202222313524.9 comprises a liquid cooling box, a feeding guide roller, a guide roller and an air cooling mechanism, wherein the feeding guide roller is arranged at the top of one feeding end of the liquid cooling box through a bracket, the guide rollers are respectively arranged at the two side edges of the bottom of the liquid cooling box, the air cooling mechanism is arranged at the top of one discharging end of the liquid cooling box, the liquid cooling mechanism comprises an air cooling box, air cooling pipes, an air supply pipe and a liquid removing roller, the air cooling box is arranged above the liquid cooling box in a suspending manner through the bracket, the bottom of the air cooling box is provided with an open structure, the inner middle part of the air cooling box is symmetrically provided with two air cooling pipes, the inner lower sides of each air cooling pipe are respectively axially provided with an air supply hole, each air cooling pipe is connected with two air cooling pipes, and the two air cooling pipes are symmetrically arranged at the upper parts of the air cooling pipes. The gas-liquid cooling and shaping device for film production has the advantages that the film can be uniformly cooled, the problem of film curling is solved, the quality of the film is effectively improved, and the production cost is reduced, but the gas-liquid cooling and shaping device for film production has the following defects:
the existing gas-liquid cooling film shaping device is provided with two guide rollers at the bottom of a liquid cooling box, the two guide rollers are immersed in cooling liquid, a new plastic film needs to be wound on the surfaces of the two guide rollers when the plastic film is replaced, if the cooling liquid is discharged and then wound, time is wasted, the working efficiency is low, and therefore the replacement of the plastic film is inconvenient.
Disclosure of Invention
The utility model aims to provide a film production cooling shaping device, which aims to solve the problems that the prior gas-liquid cooling film shaping device proposed in the background art is provided with two guide rollers at the bottom of a liquid cooling box, the two guide rollers are immersed in cooling liquid, a new plastic film needs to be wound on the surfaces of the two guide rollers when the plastic film is replaced, if the plastic film is wound after being discharged, time is wasted, the working efficiency is low, and the replacement of the plastic film is inconvenient.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a film production cooling setting device, includes the design box, the inside of design box is equipped with submergence subassembly, submergence subassembly includes template and drive assembly, template is fixed to be set up on the top of design box, template and design are connected with the transmission lead screw through sealed bearing rotation between the box, the surface of transmission lead screw has first diaphragm through screw nut threaded connection, the both sides on first diaphragm top are all fixed and are equipped with the L template, two one side of L template is all fixed and is equipped with the second diaphragm, two the bottom of second diaphragm is all fixed and is equipped with two risers, every two are corresponding all rotate through the pivot between the riser and be connected with the guide roll.
Preferably, the front faces of the two vertical plates are in sliding connection with the inner wall of the front face of the shaping box, the back faces of the other two vertical plates are in sliding connection with the inner wall of the back face of the shaping box, the surfaces of the two L-shaped plates are provided with two connecting holes, and the front face of the plate is fixedly provided with a switch panel.
Preferably, the drive assembly includes the mounting box, the mounting box is fixed to be set up on the top of template, the inside of mounting box is fixed and is equipped with driving motor, driving motor is positive and negative rotation motor, driving motor's transmission shaft and the one end fixed connection of transmission lead screw, the both sides of mounting box are all fixed and are equipped with the breather pipe, one of them the inner wall of breather pipe is fixed and is equipped with the fan.
Preferably, the top of the mounting box is hinged with a box door, the top of the box door is fixedly provided with a hidden handle, the bottom end of the box door is fixedly provided with a sealing gasket, and the surfaces of the box door and the mounting box are both coated with heat insulation paint.
Preferably, two one ends of the vent pipe are fixedly provided with hoses, one ends of the two hoses are fixedly provided with U-shaped copper pipes, and the contact parts of the two U-shaped copper pipes and the four connecting holes are fixedly connected.
Preferably, the four corners at the top end of the shaping box are fixedly provided with supporting blocks, and each two corresponding supporting blocks are respectively connected with a supporting roller through a rotating shaft in a rotating way.
Preferably, a liquid inlet pipe is fixedly arranged on one side of the shaping box, a first electric valve is fixedly arranged on the surface of the liquid inlet pipe, a liquid outlet pipe is fixedly arranged on the other side of the shaping box, and a second electric valve is fixedly arranged on the surface of the liquid outlet pipe.
Preferably, the surface of the switch panel is provided with a driving motor switch, a fan switch, a first electric valve switch and a second electric valve switch respectively, and the driving motor, the fan, the first electric valve and the second electric valve are electrically connected with an external power supply through the driving motor switch, the fan switch, the first electric valve switch and the second electric valve switch respectively.
Compared with the related art, the film production cooling and shaping device provided by the utility model has the following beneficial effects:
1. the plastic film passes through a gap between the L-shaped plate and the liquid level of the cooling liquid, the transmission screw rod rotates reversely to finally drive the two guide rollers to move downwards, and the two guide rollers push the plastic film to move downwards, so that the plastic film is immersed in the cooling liquid, the plastic film can be wound on the surfaces of the two guide rollers without discharging the cooling liquid, and the working efficiency is improved;
2. the fan produces the air current, and the air current enters into the inside of installing the case through keeping away from U type copper pipe, hose and the breather pipe of fan one side, cools down driving motor, and U type copper pipe can contact with the coolant liquid, and the air current carries out the heat exchange through U type copper pipe and coolant liquid when flowing through U type copper pipe, can reduce the temperature of air current, is favorable to promoting the radiating effect of air current to driving motor.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic cross-sectional view of the present utility model;
FIG. 3 is an enlarged schematic view of the structure of FIG. 2A according to the present utility model;
fig. 4 is a schematic cross-sectional structure of the mounting box of the present utility model.
In the figure: 1. a shaping box; 2. an immersion assembly; 21. templates; 22. a transmission screw rod; 23. a first cross plate; 24. an L-shaped plate; 25. a second cross plate; 26. a riser; 27. a guide roller; 3. a drive assembly; 31. a mounting box; 32. a driving motor; 33. a vent pipe; 34. a blower; 4. a switch panel; 5. a door; 6. a sealing gasket; 7. a hose; 8. u-shaped copper pipe; 9. a support block; 10. a support roller; 11. a liquid inlet pipe; 12. a liquid outlet pipe; 13. a first electrically operated valve; 14. and a second electrically operated valve.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1:
referring to fig. 1-4, the present utility model provides a cooling and shaping device for film production, comprising a shaping box 1, wherein an immersion component 2 is arranged in the shaping box 1;
the four corners of the top end of the shaping box 1 are fixedly provided with supporting blocks 9, each two corresponding supporting blocks 9 are rotatably connected with a supporting roller 10 through a rotating shaft, and the supporting rollers 10 can support plastic films;
a liquid inlet pipe 11 is fixedly arranged on one side of the shaping box 1, a first electric valve 13 is fixedly arranged on the surface of the liquid inlet pipe 11, a liquid outlet pipe 12 is fixedly arranged on the other side of the shaping box 1, a second electric valve 14 is fixedly arranged on the surface of the liquid outlet pipe 12, cooling liquid is led into the shaping box 1 through the liquid inlet pipe 11, and cooling liquid in the shaping box 1 can be discharged through the liquid outlet pipe 12;
the surface of the switch panel 4 is respectively provided with a first electric valve switch and a second electric valve switch, and the first electric valve 13 and the second electric valve 14 are respectively electrically connected with an external power supply through the first electric valve switch and the second electric valve switch;
referring to fig. 1-4, the utility model provides a film production cooling shaping device, which further comprises an immersing component 2, wherein the immersing component 2 comprises shaping plates 21 and a driving component 3, the shaping plates 21 are fixedly arranged at the top ends of shaping boxes 1, a transmission screw rod 22 is rotatably connected between the shaping plates 21 and the shaping boxes 1 through a sealing bearing, the surface of the transmission screw rod 22 is in threaded connection with a first transverse plate 23 through screw nuts, two sides of the top ends of the first transverse plate 23 are fixedly provided with L-shaped plates 24, one side of each of the two L-shaped plates 24 is fixedly provided with a second transverse plate 25, the bottom ends of the two second transverse plates 25 are fixedly provided with two vertical plates 26, and a guide roller 27 is rotatably connected between each two corresponding vertical plates 26 through a rotating shaft;
the front sides of the two vertical plates 26 are in sliding connection with the inner wall of the front side of the shaping box 1, the back sides of the other two vertical plates 26 are in sliding connection with the inner wall of the back side of the shaping box 1, the surfaces of the two L-shaped plates 24 are provided with two connecting holes, the front sides of the plates 21 are fixedly provided with switch panels 4, and the four vertical plates 26 cannot rotate due to being limited by the inner wall of the shaping box 1, so that the first transverse plate 23 cannot rotate;
specifically, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the transmission screw 22 is rotated first, the transmission screw 22 drives the first transverse plate 23 to move upwards, the first transverse plate 23 drives the two L-shaped plates 24 to move upwards, the two L-shaped plates 24 drive the two second transverse plates 25 to move upwards, the two second transverse plates 25 drive the four vertical plates 26 to move upwards, the four vertical plates 26 drive the two guide rollers 27 to move upwards, the height of the guide rollers 27 is increased, the guide rollers 27 are caused to separate from the cooling liquid, the height of the guide rollers 27 is higher than the liquid level of the cooling liquid, a new plastic film is conveniently wound on the surfaces of the two guide rollers 27, further, the plastic film passes through a gap between the L-shaped plates 24 and the liquid level of the cooling liquid, and is caused to be wound on the surfaces of the two support rollers 10, only one end of the plastic film is fixed, the transmission screw 22 is reversely rotated to finally cause the two guide rollers 27 to move downwards, the two guide rollers 27 push the plastic film to move downwards, the plastic film is enabled to be immersed in the cooling liquid, and the cooling liquid is conveniently discharged, and the cooling liquid can be very efficiently wound on the surfaces of the two guide rollers 27.
Example 2:
the driving assembly 3 comprises a mounting box 31, the mounting box 31 is fixedly arranged at the top end of the template 21, a driving motor 32 is fixedly arranged in the mounting box 31, the driving motor 32 is a forward and reverse motor, a transmission shaft of the driving motor 32 is fixedly connected with one end of the transmission screw 22, ventilation pipes 33 are fixedly arranged on two sides of the mounting box 31, and a fan 34 is fixedly arranged on the inner wall of one ventilation pipe 33;
the top end of the mounting box 31 is hinged with a box door 5, the top end of the box door 5 is fixedly provided with a hidden handle, the bottom end of the box door 5 is fixedly provided with a sealing gasket 6, and the surfaces of the box door 5 and the mounting box 31 are coated with heat insulation paint;
one end of each of the two vent pipes 33 is fixedly provided with a hose 7, one end of each of the two hoses 7 is fixedly provided with a U-shaped copper pipe 8, and the contact parts of the two U-shaped copper pipes 8 and the four connecting holes are fixedly connected;
the surface of the switch panel 4 is respectively provided with a driving motor switch and a fan switch, and the driving motor 32 and the fan 34 are respectively electrically connected with an external power supply through the driving motor switch and the fan switch;
specifically, as shown in fig. 1, fig. 2, fig. 3, and fig. 4, the installation box 31 that sets up at first protects driving motor 32, start fan 34 through fan switch, fan 34 produces the air current, the air current enters into the inside of installation box 31 through keeping away from U type copper pipe 8 on one side of fan 34, hose 7 and breather pipe 33, cool down driving motor 32, then discharge from the inside of installation box 31 through breather pipe 33 of opposite side, hose 7 and U type copper pipe 8, the heat insulation paint is favorable to the inside heat preservation of installation box 31, U type copper pipe 8 can be in contact with the coolant liquid when guide roll 27 is located the bottom of shaping box 1, the air current carries out the heat exchange through U type copper pipe 8 and coolant liquid when flowing through U type copper pipe 8, can reduce the temperature of air current, be favorable to promoting the radiating effect of air current to driving motor 32, start driving motor 32 through driving motor switch, driving motor 32 drives transmission lead screw 22 and rotates, need not the manual rotation transmission lead screw 22, it is more laborsaving.
Working principle: when the film production cooling shaping device is particularly used, firstly, the inside of the shaping box 1 is filled with cooling liquid, after the old plastic film which has been subjected to cooling shaping is extracted, the driving motor 32 is started by the driving motor switch, the driving motor 32 drives the transmission screw 22 to rotate, the manual rotation of the transmission screw 22 is not needed, the labor is saved, the transmission screw 22 drives the first transverse plate 23 to move upwards, the first transverse plate 23 drives the two L-shaped plates 24 to move upwards, the two L-shaped plates 24 drive the two second transverse plates 25 to move upwards, the two second transverse plates 25 drive the four vertical plates 26 to move upwards, the four vertical plates 26 drive the two guide rollers 27 to move upwards, the height of the guide rollers 27 is increased, the guide rollers 27 are caused to be separated from the cooling liquid, the height of the guide rollers 27 is higher than the liquid level of the cooling liquid, the plastic film is penetrated through a gap between the L-shaped plates 24 and the liquid level of the cooling liquid, the plastic film is arranged on the surfaces of the two supporting rollers 10, only one end of the plastic film is fixed, the driving motor 32 is controlled to reversely rotate, the driving motor 32 drives the driving screw 22 to reversely rotate, the driving screw 22 reversely rotates finally drives the two guide rollers 27 to downwards move, the two guide rollers 27 push the plastic film to downwards move, the plastic film is immersed in cooling liquid, the plastic film can be wound on the surfaces of the two guide rollers 27 without discharging the cooling liquid conveniently, the working efficiency is improved, the fan 34 is required to be supplemented, the fan 34 is started through the fan switch, air flow is generated by the fan 34, the air flow enters the inside of the installation box 31 through the U-shaped copper pipe 8, the hose 7 and the vent pipe 33 which are far away from one side of the fan 34, the driving motor 32 is cooled, and then the air flow is discharged from the inside of the installation box 31 through the vent pipe 33, the hose 7 and the U-shaped copper pipe 8 at the other side, the heat insulation paint is favorable for heat preservation in the installation box 31, the U-shaped copper pipe 8 can be contacted with cooling liquid when the guide roller 27 is positioned at the bottom in the shaping box 1, and air flow exchanges heat with the cooling liquid through the U-shaped copper pipe 8 when flowing through the U-shaped copper pipe 8, so that the temperature of the air flow can be reduced, and the heat dissipation effect of the air flow on the driving motor 32 can be improved.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a film production cooling setting device, includes design box (1), its characterized in that, the inside of design box (1) is equipped with submergence subassembly (2), submergence subassembly (2) are including template (21) and drive assembly (3), template (21) are fixed to be set up on the top of design box (1), template (21) are connected with transmission lead screw (22) through sealed bearing rotation between design box (1), the surface of transmission lead screw (22) has first diaphragm (23) through lead screw nut threaded connection, the both sides on first diaphragm (23) top are all fixed and are equipped with L template (24), two one side of L template (24) is all fixed and is equipped with second diaphragm (25), two the bottom of second diaphragm (25) is all fixed and is equipped with two riser (26), every two corresponding between riser (26) all are connected with guide roll (27) through the pivot rotation.
2. The film production cooling and shaping device according to claim 1, wherein: the front faces of the vertical plates (26) are in sliding connection with the front inner wall of the shaping box (1), the back faces of the vertical plates (26) are in sliding connection with the back inner wall of the shaping box (1), the surfaces of the L-shaped plates (24) are provided with two connecting holes, and the front face of the -shaped plate (21) is fixedly provided with a switch panel (4).
3. A film production cooling and shaping device as claimed in claim 2, wherein: the driving assembly (3) comprises a mounting box (31), the top of template (21) is fixedly arranged on the mounting box (31), a driving motor (32) is fixedly arranged in the mounting box (31), the driving motor (32) is a positive and negative rotating motor, a transmission shaft of the driving motor (32) is fixedly connected with one end of a transmission screw (22), vent pipes (33) are fixedly arranged on two sides of the mounting box (31), and a fan (34) is fixedly arranged on the inner wall of one vent pipe (33).
4. A film production cooling and shaping device according to claim 3, wherein: the top of installation case (31) articulates there is chamber door (5), the fixed hidden handle that is equipped with in top of chamber door (5), the bottom mounting of chamber door (5) is equipped with sealed pad (6), the surface of chamber door (5) and the surface of installation case (31) all are coated with the thermal-insulated lacquer.
5. A film production cooling and shaping device according to claim 3, wherein: one end of each of the two vent pipes (33) is fixedly provided with a hose (7), one end of each of the two hoses (7) is fixedly provided with a U-shaped copper pipe (8), and the contact parts of the two U-shaped copper pipes (8) and the four connecting holes are fixedly connected.
6. The film production cooling and shaping device according to claim 1, wherein: four corners at the top end of the shaping box (1) are fixedly provided with supporting blocks (9), and each two corresponding supporting blocks (9) are respectively connected with a supporting roller (10) through a rotating shaft in a rotating mode.
7. A film production cooling and shaping device according to claim 3, wherein: the shaping box is characterized in that a liquid inlet pipe (11) is fixedly arranged on one side of the shaping box (1), a first electric valve (13) is fixedly arranged on the surface of the liquid inlet pipe (11), a liquid outlet pipe (12) is fixedly arranged on the other side of the shaping box (1), and a second electric valve (14) is fixedly arranged on the surface of the liquid outlet pipe (12).
8. The film producing, cooling and shaping apparatus according to claim 7, wherein: the surface of the switch panel (4) is provided with a driving motor switch, a fan switch, a first electric valve switch and a second electric valve switch respectively, and the driving motor (32), the fan (34), the first electric valve (13) and the second electric valve (14) are electrically connected with an external power supply through the driving motor switch, the fan switch, the first electric valve switch and the second electric valve switch respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321570203.5U CN220280241U (en) | 2023-06-20 | 2023-06-20 | Film production cooling setting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321570203.5U CN220280241U (en) | 2023-06-20 | 2023-06-20 | Film production cooling setting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220280241U true CN220280241U (en) | 2024-01-02 |
Family
ID=89340348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321570203.5U Active CN220280241U (en) | 2023-06-20 | 2023-06-20 | Film production cooling setting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220280241U (en) |
-
2023
- 2023-06-20 CN CN202321570203.5U patent/CN220280241U/en active Active
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