CN219727191U - Temperature control device for PS board tectorial membrane - Google Patents
Temperature control device for PS board tectorial membrane Download PDFInfo
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- CN219727191U CN219727191U CN202321177869.4U CN202321177869U CN219727191U CN 219727191 U CN219727191 U CN 219727191U CN 202321177869 U CN202321177869 U CN 202321177869U CN 219727191 U CN219727191 U CN 219727191U
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- temperature control
- plate
- mounting frame
- roller
- control device
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- 210000002489 tectorial membrane Anatomy 0.000 title description 11
- 239000007888 film coating Substances 0.000 claims abstract description 16
- 238000009501 film coating Methods 0.000 claims abstract description 16
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 23
- 238000010030 laminating Methods 0.000 claims description 15
- 238000005485 electric heating Methods 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 10
- 239000004793 Polystyrene Substances 0.000 description 85
- 230000001681 protective effect Effects 0.000 description 13
- 238000009434 installation Methods 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007605 air drying Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The utility model relates to the technical field of PS plate processing, in particular to a temperature control device for PS plate film coating, which comprises: the device comprises a first mounting frame and a second mounting frame which are arranged at intervals, wherein a plurality of supporting rollers are connected to the first mounting frame at intervals, a plurality of supporting rollers are connected to the second mounting frame at intervals, and the device further comprises a film covering mechanism for covering films on the upper surface and the lower surface of the PS plate and a temperature control mechanism for adjusting the temperature of the upper surface and the lower surface of the PS plate, wherein the temperature control mechanism and the film covering mechanism are sequentially arranged along the conveying direction of the PS plate; the temperature control mechanism comprises a fixing frame and two temperature control components symmetrically arranged in the vertical direction, a PS plate is arranged between the temperature control components in a penetrating mode, the fixing frame is connected between the first mounting frame and the second mounting frame, and the fixing frame is connected with the two temperature control components respectively. Through the mode, the temperature control device for the PS board film coating provided by the utility model has the advantages that the PS board before film coating has proper temperature through the arrangement of the temperature control mechanism, and the film coating effect is enhanced.
Description
Technical Field
The utility model relates to the technical field of PS plate processing, in particular to a temperature control device for PS plate film coating.
Background
PS board, also called organic board, uses polystyrene as raw material, can be colored freely, and belongs to nontoxic and odorless environment-friendly material. The PS board has the advantages of rigidity, insulation, etc., and is thus used in the fields of container equipment, electric appliances, packaging, decoration, etc.
The processing flow of the PS plate comprises the steps of raw material stirring, air drying, heating extrusion, forming, film coating, side cutting, cutting and the like, and in the film coating step, the upper surface and the lower surface of the PS plate are required to be adhered with protective films, so that the surface of the PS plate is protected.
For the related art, the inventor finds that in the process of covering the protective film, a certain requirement is provided for the temperature of the upper surface and the lower surface of the PS plate before the protective film, in winter, the heat on the PS plate is rapidly dissipated after the forming, so that the temperature of the PS plate is lower, the bonding effect of the PS plate and the protective film is poor, in hot summer, the heat on the PS plate cannot be rapidly dissipated after the forming, the temperature of the PS plate is higher, the PS plate transmits the heat to the protective film, the phenomenon of curling is easily generated after the protective film absorbs more heat, and the film covering effect is reduced.
Disclosure of Invention
The utility model mainly solves the technical problem of providing a temperature control device for PS board film coating, which ensures that the PS board before film coating has proper temperature through the arrangement of a temperature control mechanism, thereby enhancing film coating effect.
In order to solve the technical problems, the utility model adopts a technical scheme that: provided is a temperature control device for PS board coating, comprising: the device comprises a first mounting frame and a second mounting frame which are arranged at intervals, wherein a plurality of supporting rollers are connected to the first mounting frame at intervals, a plurality of supporting rollers are connected to the second mounting frame at intervals, and the device further comprises a film covering mechanism for covering films on the upper surface and the lower surface of the PS plate and a temperature control mechanism for adjusting the temperature of the upper surface and the lower surface of the PS plate, wherein the temperature control mechanism and the film covering mechanism are sequentially arranged along the conveying direction of the PS plate;
the temperature control mechanism comprises a fixing frame and two temperature control components symmetrically arranged in the vertical direction, a PS plate is arranged between the temperature control components in a penetrating mode, the fixing frame is connected between the first mounting frame and the second mounting frame, and the fixing frame is connected with the two temperature control components respectively.
Through adopting above-mentioned technical scheme, when using, the PS board after the shaping removes on the backing roll on mounting bracket one and mounting bracket two, use the thermometer to measure the surface temperature of PS board, when the temperature of PS board surface is higher than or be less than the temperature that is suitable for the tectorial membrane, through the surface of operation temperature control mechanism effect at the PS board, thereby adjust the temperature on PS board surface, make the temperature on PS board surface keep in certain within range, thereby be fit for the protection film cover and connect at the surface of PS board, have better joint strength between protection film and the PS board, and the surface of protection film is leveled, the result of use has been strengthened.
The present utility model may be further configured in a preferred example to: the temperature control assembly comprises a diversion shell part and a jet type roller part which is rotationally connected to the inner cavity of the diversion shell part, one end of the jet type roller part is connected with a rotary joint, the outer end of the rotary joint is connected with a three-way joint, one interface of the three-way joint is connected with a first switch valve, the first switch valve is connected with an external electric heating fan through a pipeline, the other interface of the three-way joint is connected with a second switch valve, the second switch valve is connected with an external blower through a pipeline, and the other end of the jet type roller part is connected with a rotary driving part.
By adopting the technical scheme, in cold winter, the temperature of the working environment is lower, part of heat of the formed PS plate is rapidly dispersed, so that when the temperature of the surface of the PS plate is lower than the temperature suitable for film coating, after the second switch valve is closed, the external electric heating fan is opened, hot air generated by the electric heating fan enters the jet roller part, the rotary driving part drives the jet roller part to do circumferential rotation, part of hot air in the jet roller part directly blows on the PS plate, the other part of hot air blows on the guide shell part, the guide shell part guides the hot air to blow on the moving PS plate, namely, the temperature of the surface of the PS plate is increased to be suitable for bonding a protective film on the surface of the PS plate, when the temperature of the working environment is higher in hot summer, part of heat of the formed PS plate cannot be rapidly dispersed, when the temperature of the surface of the PS plate is higher than the temperature suitable for film coating, after the first switch valve is closed, part of the jet roller part is driven to do circumferential rotation, the air blower generated by the working enters the jet roller part to directly blow on the PS plate, the other part of the jet roller part drives the air blower to blow on the circumferential surface of the guide shell part, namely, the air blowing effect of the PS plate is improved, and the surface of the PS plate is directly driven on the surface of the guide shell part is blown on the surface of the PS plate, namely, the surface of the PS plate is uniformly blown on the surface of the guide plate is cooled, and the surface of the PS plate is uniformly blown on the surface of the PS plate.
The present utility model may be further configured in a preferred example to: the jet-propelled roller piece comprises a sealing roller, a supporting shaft and a hollow shaft, wherein the supporting shaft and the hollow shaft are connected to the two ends of the sealing roller, an inner hole of the hollow shaft is communicated with an inner cavity of the sealing roller, the outer end of the supporting shaft is connected with a rotary driving piece, the outer end of the hollow shaft is connected with the rotary joint, and a plurality of blowing holes are formed in the outer surface of the sealing roller at intervals.
Through adopting above-mentioned technical scheme, in the hot-blast entering sealed cylinder of electric heater fan production passed through the hollow shaft, hot-blast rethread blow hole blows on the surface of PS board for the temperature on PS board surface risees, has strengthened the homogeneity of heating, or in the wind that the air-blower produced gets into sealed cylinder through the hollow shaft, and the wind rethread blow hole blows on the surface of PS board, makes the temperature on PS board surface reduce, has strengthened radiating homogeneity.
The present utility model may be further configured in a preferred example to: the flow guiding shell piece comprises an arc-shaped reverse flow plate and inclined flow guiding plates connected to two side edges of the arc-shaped reverse flow plate, two ends of the arc-shaped reverse flow plate are respectively connected with end sealing plates, and the end sealing plates are connected with the end parts of the inclined flow guiding plates.
Through adopting above-mentioned technical scheme, electric heater fan work produces hot-blast, and partial hot-blast direction change is acted on the surface of PS board behind the arc backward flow board, and still partial hot-blast direction change is acted on the surface of PS board behind the slope guide plate, and remaining hot-blast direct blowing is on the surface of PS board, or the air-blower work produces wind, and partial wind direction change is acted on the surface of PS board behind the arc backward flow board, and still partial wind direction change is acted on the surface of PS board behind the slope guide plate, and remaining wind direct blowing is on the surface of PS board.
The present utility model may be further configured in a preferred example to: the fixing frame comprises a plurality of connecting plates connected to two sides of the diversion shell and supporting plates connected to the front end and the rear end of the diversion shell, and the connecting plates are connected with the corresponding first installation frame and the corresponding second installation frame.
Through adopting above-mentioned technical scheme, through the use of connecting plate for the temperature control subassembly of below is connected between mounting bracket one and mounting bracket two, through the use of backup pad, makes two temperature control subassemblies fixed connection become wholly.
The present utility model may be further configured in a preferred example to: the laminating mechanism comprises an upper laminating component and a lower laminating component, the upper laminating component comprises an upper unreeling roller, an upper laminating roller and an upper vertical plate which is rotationally connected to the two ends of the upper unreeling roller, the upper vertical plate is connected with a mounting frame in a rotating mode, the two ends of the upper laminating roller are respectively connected with an L-shaped plate in a rotating mode, the vertical side edge of the L-shaped plate is connected with the mounting frame in a rotating mode, the lower laminating component comprises a lower unreeling roller, a lower laminating roller and a lower vertical plate which is rotationally connected to the two ends of the lower unreeling roller, and the lower vertical plate is connected with the mounting frame in a rotating mode, and is located under the upper laminating roller and is rotationally connected with the mounting frame.
Through adopting above-mentioned technical scheme, go up the protection film on the unreeling cylinder and unreel the back, pass through last press film cylinder with the protection film pressfitting at the upper surface of PS board, the protection film on the unreeling cylinder is through unreeling the back down, pass through the press film cylinder with the protection film pressfitting at the lower surface of PS board down.
In summary, the present utility model includes at least one of the following beneficial technical effects:
1. when the temperature of the working environment is lower, the external electric heating fan works to generate hot air, and the hot air is blown out through the air blowing hole of the temperature control assembly and then acts on the surface of the PS plate, so that the temperature of the surface of the PS plate is increased to be in a temperature range suitable for bonding the protective film, and the film coating effect is enhanced.
2. When the temperature of the working environment is higher, the external blower works to generate wind, and the wind is blown out through the wind blowing hole of the temperature control assembly and then acts on the surface of the PS plate, so that the temperature of the surface of the PS plate is reduced to be within a temperature range suitable for bonding the protective film, and the film covering effect is enhanced.
Drawings
For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
fig. 1 is a schematic structural diagram of a temperature control device for PS board lamination according to a preferred embodiment of the present utility model.
Fig. 2 is a schematic structural diagram of the temperature control assembly in fig. 1.
Fig. 3 is a cross-sectional view taken along line A-A in fig. 2.
Fig. 4 is a schematic structural view of the connection plate in fig. 1.
In the figure: 1. a first mounting frame; 2. a second mounting frame; 3. a supporting roller; 40. a fixing frame; 50. a temperature control assembly; 60. An upper film covering component; 70. a lower film-covering component;
41. a connecting plate; 42. a support plate;
51. a deflector housing member; 52. a jet roller member; 53. a rotary joint; 54. a three-way joint; 55. a rotary driving member; 56. a first switching valve; 57. a second switching valve;
511. an arc-shaped reverse flow plate; 512. an inclined deflector; 513. an end sealing plate;
521. sealing the roller; 522. a support shaft; 523. a hollow shaft; 524. a blowing hole;
61. an upper unreeling roller; 62. a film pressing roller is arranged; 63. an upper riser; 64. an L-shaped plate;
71. a lower unreeling roller; 72. a film pressing roller is pressed down; 73. and a lower vertical plate.
Description of the embodiments
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.
The drawings are simplified schematic views, and only the basic structure of the present utility model is schematically described, so that only the constitution related to the present utility model is shown.
Referring to fig. 1, a temperature control device for a PS board film according to the present utility model includes: the installation frame I and the installation frame II 2 that the interval set up, the interval rotates on the installation frame I and is connected with a plurality of supporting rollers 3, the interval on the installation frame II is rotated and is connected with a plurality of supporting rollers 3, the PS board moves on supporting roller 3, still include for the tectorial membrane mechanism of PS board upper and lower surface tectorial membrane and the accuse temperature mechanism of adjusting PS board upper and lower surface temperature, the direction that temperature control mechanism and tectorial membrane mechanism follow PS board transmission sets gradually, tectorial membrane mechanism includes tectorial membrane subassembly 60 and lower tectorial membrane subassembly 70, go up tectorial membrane subassembly 60 and include unwinding cylinder 61, go up press film cylinder 62 and rotate the last riser 63 of connecting at unwinding cylinder 61 both ends, go up riser 63 and be connected with installation frame I1, go up press film cylinder 62's both ends and rotate respectively and be connected with L shaped plate 64, L shaped plate 64's vertical side is connected with installation frame I, lower tectorial membrane subassembly 70 is including lower unwinding cylinder 71, lower press film cylinder 72 and rotate the lower riser 73 of connecting at unwinding cylinder 71 both ends, lower riser 73 is connected with 1, press film cylinder 72 is located under the press film 62 and is connected with installation frame 1.
Referring to fig. 2, the temperature control mechanism includes a fixing frame 40 and two temperature control components 50 symmetrically arranged in a vertical direction, a PS plate is penetrated between the temperature control components 50, the fixing frame 40 is connected between the first mounting frame 1 and the second mounting frame 2, the fixing frame 40 is respectively connected with the two temperature control components 50, the temperature control components 50 include a diversion shell member 51 and a jet drum member 52 rotatably connected to an inner cavity of the diversion shell member 51, one end of the jet drum member 52 is connected with a rotary joint 53, an outer end of the rotary joint 53 is connected with a three-way joint 54, one interface of the three-way joint 54 is connected with a first switch valve 56, the first switch valve 56 is connected with an external electric heating fan through a pipeline, the other interface of the three-way joint 54 is connected with a second switch valve, the second switch valve 57 is connected with an external fan through a pipeline, the other end of the jet drum member 52 is connected with a rotary driving member 55, the rotary driving member 55 is a servo motor, the rotary driving member 55 works to drive the jet drum member 52 to perform circumferential rotation, the jet drum member 52 includes a sealing drum 521, support shafts 522 and 523 connected to both ends of the sealing drum 521, an inner cavity of the hollow shaft 523 is connected with the sealing drum 521, the outer surface of the sealing drum 521 is connected with the outer end of the hollow shaft 521, and the sealing drum 521 is connected with the outer surface of the hollow shaft 53, which is connected with the inner cavity of the sealing drum 521, and the sealing drum 521 is connected with the outer end of the hollow shaft 53.
Referring to fig. 3, the flow guiding housing member 51 includes an arc-shaped reverse flow plate 511 and inclined flow guiding plates 512 connected to both sides of the arc-shaped reverse flow plate 511, and end sealing plates 513 are connected to both ends of the arc-shaped reverse flow plate 511, respectively, and the end sealing plates 513 are connected to ends of the inclined flow guiding plates 512.
Referring to fig. 1 and 4, the fixing frame 40 includes a plurality of connection plates 41 connected to both sides of the guide housing member 51 and support plates 42 connected to both front and rear ends of the guide housing member 51, the connection plates 41 are connected to the corresponding first and second mounting frames 1 and 2, and the lower temperature control assembly 50 is connected between the first and second mounting frames 1 and 2 by using the connection plates 41, and the two temperature control assemblies 50 are fixedly connected to form a whole by using the support plates 42.
The implementation principle of the embodiment is as follows: when the PS plate is used, the formed PS plate moves on the supporting roller 3 on the first mounting frame 1 and the second mounting frame 2, when the temperature of the working environment is low in cold winter, part of heat of the formed PS plate is rapidly emitted, when the temperature of the surface of the PS plate is lower than the temperature suitable for coating, the second switch valve 57 is closed, the external electric heating fan is opened, hot air generated by the operation of the electric heating fan enters the jet roller piece 52, the rotary driving piece 55 drives the jet roller piece 52 to perform circumferential rotation, part of hot air in the jet roller piece 52 directly blows on the PS plate, the other part of hot air blows on the guide shell piece 51, the guide shell piece 51 guides the hot air to blow on the moving PS plate, so that the hot air generated by the electric heating fan uniformly blows on the surface of the PS plate, namely the surface temperature of the PS plate is suitable for bonding the protective film on the surface, in hot summer, when the temperature of the working environment is higher, part of heat of the formed PS plate cannot be rapidly dissipated, so that when the temperature of the surface of the PS plate is higher than the temperature suitable for film coating, after the first switch valve 56 is closed, an external blower is turned on, wind generated by the blower working enters the jet roller piece 52, the jet roller piece 52 is driven by the rotary driving piece 55 to do circumferential rotation, part of wind in the jet roller piece 52 directly blows on the PS plate, the other part of wind blows on the guide shell piece 51, the guide shell piece 51 guides the wind to blow on the moving PS plate, the wind generated by the blower uniformly blows on the surface of the PS plate, the purpose of cooling is achieved, namely, the temperature of the surface of the PS plate is suitable for bonding a protective film on the surface of the PS plate, the protective film and the PS plate have good connection strength, and the surface of the protective film is flat, the use effect is enhanced.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present utility model.
Claims (6)
1. A temperature control device for a PS board coating, comprising: the device comprises a first mounting frame (1) and a second mounting frame (2) which are arranged at intervals, wherein a plurality of supporting rollers (3) are connected to the first mounting frame (1) at intervals, a plurality of supporting rollers (3) are connected to the second mounting frame (2) at intervals, a film covering mechanism for covering films on the upper surface and the lower surface of a PS plate and a temperature control mechanism for adjusting the temperature of the upper surface and the lower surface of the PS plate are further included, and the temperature control mechanism and the film covering mechanism are sequentially arranged along the conveying direction of the PS plate;
the temperature control mechanism comprises a fixing frame (40) and two temperature control components (50) symmetrically arranged in the vertical direction, a PS plate is arranged between the temperature control components (50) in a penetrating mode, the fixing frame (40) is connected between a first mounting frame (1) and a second mounting frame (2), and the fixing frame (40) is connected with the two temperature control components (50) respectively.
2. The temperature control device for the PS board coating according to claim 1, wherein the temperature control assembly (50) comprises a diversion shell member (51) and a jet roller member (52) rotatably connected to an inner cavity of the diversion shell member (51), one end of the jet roller member (52) is connected with a rotary joint (53), an outer end of the rotary joint (53) is connected with a three-way joint (54), one interface of the three-way joint (54) is connected with a first switch valve (56), the first switch valve (56) is connected with an external electric heating fan through a pipeline, the other interface of the three-way joint (54) is connected with a second switch valve (57), the second switch valve (57) is connected with an external blower through a pipeline, and the other end of the jet roller member (52) is connected with a rotary driving member (55).
3. The temperature control device for the PS plate film coating according to claim 2, wherein the jet roller (52) comprises a sealing roller (521), a supporting shaft (522) and a hollow shaft (523), wherein the supporting shaft (522) is connected to two ends of the sealing roller (521), an inner hole of the hollow shaft (523) is communicated with an inner cavity of the sealing roller (521), an outer end of the supporting shaft (522) is connected with a rotary driving member (55), an outer end of the hollow shaft (523) is connected with the rotary joint (53), and a plurality of blowing holes (524) are formed on an outer surface of the sealing roller (521) at intervals.
4. The temperature control device for PS plate coating according to claim 2, wherein the flow guiding housing member (51) comprises an arc-shaped reverse flow plate (511) and inclined flow guiding plates (512) connected to two sides of the arc-shaped reverse flow plate (511), two ends of the arc-shaped reverse flow plate (511) are respectively connected with end sealing plates (513), and the end sealing plates (513) are connected with ends of the inclined flow guiding plates (512).
5. The temperature control device for the film coating of the PS plate according to claim 1, wherein the fixing frame (40) comprises a plurality of connecting plates (41) connected to two sides of the diversion shell (51) and supporting plates (42) connected to the front end and the rear end of the diversion shell (51), and the connecting plates (41) are connected with the corresponding first mounting frame (1) and the corresponding second mounting frame (2).
6. The temperature control device for laminating a PS plate according to claim 1, wherein the laminating mechanism comprises an upper laminating assembly (60) and a lower laminating assembly (70), the upper laminating assembly (60) comprises an upper unreeling roller (61), an upper film pressing roller (62) and upper risers (63) rotatably connected to two ends of the upper unreeling roller (61), the upper risers (63) are connected with a first mounting frame (1), two ends of the upper film pressing roller (62) are respectively rotatably connected with an L-shaped plate (64), vertical sides of the L-shaped plate (64) are connected with the first mounting frame (1), the lower laminating assembly (70) comprises a lower unreeling roller (71), a lower film pressing roller (72) and lower risers (73) rotatably connected to two ends of the lower unreeling roller (71), and the lower film pressing roller (72) is located right below the upper film pressing roller (62) and rotatably connected with the first mounting frame (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321177869.4U CN219727191U (en) | 2023-05-16 | 2023-05-16 | Temperature control device for PS board tectorial membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321177869.4U CN219727191U (en) | 2023-05-16 | 2023-05-16 | Temperature control device for PS board tectorial membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219727191U true CN219727191U (en) | 2023-09-22 |
Family
ID=88057078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321177869.4U Active CN219727191U (en) | 2023-05-16 | 2023-05-16 | Temperature control device for PS board tectorial membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219727191U (en) |
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2023
- 2023-05-16 CN CN202321177869.4U patent/CN219727191U/en active Active
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