CN220023187U - Novel magnetic flexible circuit board - Google Patents
Novel magnetic flexible circuit board Download PDFInfo
- Publication number
- CN220023187U CN220023187U CN202320755293.9U CN202320755293U CN220023187U CN 220023187 U CN220023187 U CN 220023187U CN 202320755293 U CN202320755293 U CN 202320755293U CN 220023187 U CN220023187 U CN 220023187U
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- Prior art keywords
- circuit board
- magnetic
- flexible circuit
- ink layer
- backlight
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 23
- 239000004642 Polyimide Substances 0.000 claims description 17
- 229920001721 polyimide Polymers 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 15
- 239000010949 copper Substances 0.000 claims description 15
- 239000011888 foil Substances 0.000 claims description 10
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 239000011889 copper foil Substances 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 40
- 229910052742 iron Inorganic materials 0.000 abstract description 20
- 239000002390 adhesive tape Substances 0.000 abstract description 19
- 239000000463 material Substances 0.000 abstract description 9
- 239000010410 layer Substances 0.000 description 50
- 238000010586 diagram Methods 0.000 description 11
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 239000012790 adhesive layer Substances 0.000 description 5
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229940067573 brown iron oxide Drugs 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- WTFXARWRTYJXII-UHFFFAOYSA-N iron(2+);iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Fe+2].[Fe+3].[Fe+3] WTFXARWRTYJXII-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The utility model discloses a novel magnetic flexible circuit board, which comprises: the flexible circuit board is bound to the LCD module, the backlight module is arranged below the LCD module, the backlight iron frame flexible circuit board for bearing the backlight module is arranged on the backlight module and comprises a magnetic surface and a non-magnetic surface, the magnetic surface is arranged on one side, close to the backlight iron frame, of the flexible circuit board, the non-magnetic surface is arranged on the other side of the flexible circuit board opposite to the magnetic surface, the magnetic surface is coated with a magnetic ink layer, and after the flexible circuit board is bent, the flexible circuit board is adsorbed and fixed on the surface of the backlight iron frame through the magnetic ink layer coated by the magnetic surface. The novel magnetic flexible circuit board provided by the utility model replaces the original attached conductive double-sided adhesive tape, so that the flexible circuit board is adsorbed on the backlight iron frame. The conductive double-sided adhesive tape is not required to be attached to one side of the flexible circuit board, so that manual operation posts are reduced, the assembly efficiency is remarkably improved, a large amount of labor and materials are prevented from being wasted, the cost of the link is reduced, and the product competitiveness is improved.
Description
Technical Field
The utility model relates to the technical field of liquid crystal display, in particular to a novel magnetic flexible circuit board.
Background
The display module is provided with a flexible circuit board (FPC), and before shipment, the FPC of the display module is required to be bent and attached to a backlight iron frame of the display module in an alignment manner, and the operation is generally completed in a module factory. In the prior art, a conductive double-sided adhesive tape is firstly attached to one side surface of a backlight iron frame of a flexible printed circuit board, and then the flexible printed circuit board FPC is bent and is attached to the backlight iron frame in an alignment manner.
Fig. 1 is a schematic structural diagram of a conventional display module, which includes a cover plate, an OCA layer, upper and lower polarizers, a TFT liquid crystal display, and a backlight module, as shown in fig. 1, wherein a backlight iron frame is wrapped on the outermost layer of the backlight module to protect the backlight film.
Fig. 2 is a schematic diagram of an existing display module and a flexible circuit board (FPC) bonded with the same, fig. 3 is an operation schematic diagram of an existing display module and a flexible circuit board (FPC) bonded with the same, on which components such as a capacitive resistor TVS tube, a connector (the other side of the connector includes steel sheet reinforcement), signal routing wires, copper leakage blocks (1-3) and the like are arranged, and a conductive double-sided adhesive tape is attached to the back of the FPC by attaching a layer of conductive double-sided adhesive tape to the back of the FPC, so that static electricity is effectively released in order to ensure the grounding effect of the FPC and the back of the FPC, the conductive double-sided adhesive tape must cover the copper leakage blocks, and then is adhered to the back of the FPC after being bent and aligned (fig. 3).
The method for attaching the double-sided conductive adhesive tape firstly needs to attach the double-sided conductive adhesive tape on the flexible circuit board manually, the operation can not only cause the problems of increased material cost, increased manual operation post and the like, but also easily cause the condition that labor and material resources are required to be expended for reworking due to the fact that the double-sided conductive adhesive tape is not attached in place, and the working efficiency of module manufacturing is affected. Meanwhile, the conductive double-sided adhesive tape is easily affected by temperature and humidity, and the adhesive layer is aged after long-term use, so that the problems of weakening of the adhesive property, degumming and the like occur, and the reliability and the service life of a product are affected.
Disclosure of Invention
Accordingly, it is necessary to provide a novel magnetic flexible circuit board to replace the original adhesive conductive double sided tape, so that the flexible circuit board is adsorbed on the backlight frame. The conductive double-sided adhesive tape is not required to be attached to one side of the flexible circuit board, so that manual operation posts are reduced, the assembly efficiency is remarkably improved, a large amount of labor and materials are prevented from being wasted, the cost of the link is reduced, and the product competitiveness is improved.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a novel magnetism flexible wiring board, includes the flexible wiring board, it is bound in the LCD module the below of LCD module is provided with backlight unit, be equipped with on the backlight unit and bear backlight unit's the iron frame in a poor light, the flexible wiring board includes magnetic surface and non-magnetic surface, the magnetic surface sets up at the flexible wiring board and is close to one side of backlight iron frame, the non-magnetic surface set up for the opposite side of the flexible wiring board of magnetic surface, the magnetic surface coating has the magnetic ink layer, the flexible wiring board is after buckling through the magnetic surface coating the magnetic ink layer adsorbs the surface of fixing backlight iron frame.
As a preferred implementation mode of the novel magnetic flexible circuit board provided by the utility model, the thickness of the magnetic ink layer is 25-35 um.
As a preferred embodiment of the novel magnetic flexible circuit board provided by the utility model, the magnetic ink layer can be black, grey or brown, and the magnetic material in the magnetic ink layer comprises at least one of iron oxide black and iron oxide brown.
As a preferred implementation mode of the novel magnetic flexible circuit board provided by the utility model, the flexible circuit board further comprises an inner polyimide layer, copper foils are arranged on two sides of the inner polyimide layer, a sinking foil is arranged on the outer side of the copper foil, an outer polyimide layer coated with an adhesive is arranged on the outer side of the sinking foil, and an EMI layer is arranged on the outer side of the outer polyimide layer.
As a preferred implementation mode of the novel magnetic flexible circuit board provided by the utility model, a copper leakage block is arranged on the submerged foil at one side of the novel magnetic flexible circuit board.
As a preferred implementation mode of the novel magnetic flexible circuit board provided by the utility model, the region where the copper leakage block is located is removed from the outer polyimide layer and the EMI layer to form a copper leakage block region.
As a preferred embodiment of the novel magnetic flexible circuit board provided by the utility model, the magnetic ink layer is coated on the surface of the copper-leaking block
As a preferred embodiment of the novel magnetic flexible circuit board provided by the utility model, the thickness of the magnetic ink layer in the copper leakage block area is 50um-60um, and the magnetic ink layer in the copper leakage block area can be black, grey or brown and comprises at least one of iron oxide black and iron oxide brown.
As a preferred implementation mode of the novel magnetic flexible circuit board provided by the utility model, the thickness of the magnetic ink layer of the copper leakage block area is kept consistent with the thickness of the magnetic ink layer of other areas.
As a preferred embodiment of the novel magnetic flexible printed circuit board provided by the utility model, the coverage area of the magnetic ink layer is the whole area or partial area of one side of the flexible printed circuit board
Compared with the prior art, the utility model has the following beneficial effects:
the utility model provides a novel magnetic flexible circuit board, which comprises: the flexible circuit board is bound to the LCD module, the backlight module is arranged below the LCD module, the backlight iron frame flexible circuit board for bearing the backlight module is arranged on the backlight module and comprises a magnetic surface and a non-magnetic surface, the magnetic surface is arranged on one side, close to the backlight iron frame, of the flexible circuit board, the non-magnetic surface is arranged on the other side of the flexible circuit board opposite to the magnetic surface, the magnetic surface is coated with a magnetic ink layer, and after the flexible circuit board is bent, the flexible circuit board is adsorbed and fixed on the surface of the backlight iron frame through the magnetic ink layer coated by the magnetic surface.
The novel magnetic flexible circuit board provided by the utility model replaces the original attached conductive double-sided adhesive tape, so that the flexible circuit board is adsorbed on the backlight iron frame. The conductive double-sided adhesive tape is not required to be attached to one side of the flexible circuit board, so that manual operation posts are reduced, the assembly efficiency is remarkably improved, a large amount of labor and materials are prevented from being wasted, the cost of the link is reduced, and the product competitiveness is improved.
Drawings
In order to more clearly illustrate the solution of the present utility model, a brief description will be given below of the drawings required for the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a display module in the prior art;
FIG. 2 is a schematic diagram of a conventional display module and a Flexible Printed Circuit (FPC) bonded thereto;
FIG. 3 is a schematic diagram illustrating the operation of a conventional display module and a Flexible Printed Circuit (FPC) bonded thereto;
FIG. 4 is a schematic view of the inner layered structure of a Flexible Printed Circuit (FPC) of the novel magnetic flexible printed circuit according to the present embodiment;
FIG. 5-1 is a schematic diagram of the working state of the novel magnetic flexible printed circuit board according to the present embodiment 1;
fig. 5-2 is a schematic diagram of the working state of the novel magnetic flexible circuit board according to the embodiment 2.
The labels in the figures are illustrated below:
a flexible circuit board 1, a backlight module 2;
a backlight iron frame 21;
magnetic face 11, non-magnetic face 12, inner polyimide layer 13, copper foil 14, submerged foil 15, outer polyimide layer 16, EMI layer 17, copper-leakage block 18, copper-leakage block region 19;
magnetic ink layer 110.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
As described in the background art, the display modules are all provided with flexible circuit boards (FPCs), and before shipment, the FPCs of the display modules need to be aligned, bent and attached to the backlight frame of the display module, which is generally done in a module factory. In the prior art, a conductive double sided tape is attached to one side of a backlight frame, and then the Flexible Printed Circuit (FPC) is bent and aligned to attach to the backlight frame, and fig. 1 is a schematic structural diagram of a display module in the prior art, which includes a cover plate, an OCA layer, upper and lower polarizers, a TFT liquid crystal display and a backlight module. The cover plate plays a role in protecting the display module, the OCA adhesive layer is used for bonding the cover plate with the upper polaroid, the upper polaroid and the lower polaroid perform a polarization display function on light, the TFT liquid crystal display provides a display function, and the backlight module plays a role in providing a light source. The outermost layer of the backlight module comprises a backlight iron frame, and plays a role in protecting the backlight film. Fig. 2 is a schematic diagram of a conventional display module and a flexible circuit board (FPC) bonded with the same, on which components such as a capacitive resistor TVS tube, a connector (the other side of the connector includes steel sheet reinforcement), signal traces, copper leakage blocks (1-3) and the like are arranged, and a conductive double-sided adhesive layer is attached to the back of the FPC, so that the conductive double-sided adhesive layer must cover the copper leakage blocks in order to ensure the grounding effect of the FPC and the backlight frame and release static electricity, and then adhere to the backlight frame after bending and aligning (as shown in fig. 3, fig. 3 is a schematic operation diagram of the conventional display module and the flexible circuit board (FPC) bonded with the same). The method for attaching the double-sided conductive adhesive tape firstly needs to attach the double-sided conductive adhesive tape on the flexible circuit board manually, the operation can not only cause the problems of increased material cost, increased manual operation post and the like, but also easily cause the condition that labor and material resources are required to be expended for reworking due to the fact that the double-sided conductive adhesive tape is not attached in place, and the working efficiency of module manufacturing is affected. Meanwhile, the conductive double-sided adhesive tape is easily affected by temperature and humidity, and the adhesive layer is aged after long-term use, so that the problems of weakening of the adhesive property, degumming and the like occur, and the reliability and the service life of a product are affected.
In order to solve the technical problem, the utility model provides a novel magnetic flexible circuit board.
Specifically, please refer to fig. 1-4, wherein fig. 4 is a schematic view of an internal layered structure of a Flexible Printed Circuit (FPC) of the novel magnetic flexible printed circuit according to the present embodiment, and the novel magnetic flexible printed circuit specifically includes:
the flexible circuit board 1 is bound to the LCD module, the backlight module 2 is arranged below the LCD module, the backlight frame 21 for carrying the backlight module is arranged on the backlight module 2, the flexible circuit board 1 comprises a magnetic surface 11 and a non-magnetic surface 12, the magnetic surface 11 is arranged on one side of the flexible circuit board 1, which is close to the backlight frame 21, the non-magnetic surface 12 is arranged on the other side of the flexible circuit board 1 opposite to the magnetic surface 11, the magnetic surface 11 is coated with a magnetic ink layer 110, and after the flexible circuit board 1 is bent, the magnetic ink layer 110 coated by the magnetic surface 11 is adsorbed and fixed on the surface of the backlight frame 21.
The novel magnetic flexible circuit board provided by the utility model is replaced by arranging the magnetic ink layer 110 on the back surface of the flexible circuit board 1, namely the magnetic surface 11 side, so that the flexible circuit board 1 is firmly adsorbed on the backlight iron frame 21 by using the conductive double faced adhesive tape attached in the prior art. The conductive double-sided adhesive tape is not required to be attached to one side of the flexible circuit board 1, so that manual operation posts are reduced, the assembly efficiency is obviously improved, a large amount of labor and materials are avoided being wasted, the cost of the link is reduced, and the market competitiveness of the product is improved.
In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that, under the condition of no conflict, the embodiments of the present utility model and the features and technical solutions in the embodiments may be combined with each other.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
Example 1
Referring to fig. 1-4, a novel magnetic flexible circuit board specifically includes: the flexible circuit board 1 is bound to the LCD module, the backlight module 2 is disposed below the LCD module, the backlight frame 21 for carrying the backlight module is disposed on the backlight module 2, specifically, in this embodiment, the flexible circuit board 1 includes a magnetic surface 11 and a non-magnetic surface 12, the magnetic surface 11 is disposed on one side of the flexible circuit board 1 near the backlight frame 21, the non-magnetic surface 12 is disposed on the other side of the flexible circuit board 1 opposite to the magnetic surface 11, the magnetic surface 11 is coated with a magnetic ink layer 110, and after the flexible circuit board 1 is bent, the magnetic ink layer 110 coated by the magnetic surface 11 is fixed on the surface of the backlight frame 21 in an adsorption manner.
Example 2
The novel magnetic flexible circuit board provided in embodiment 1 is further optimized, specifically, the thickness of the magnetic ink layer 110 coated is 25um-35um. The magnetic ink layer 110 may be black or gray or brown, and the magnetic material in the magnetic ink layer 110 includes at least one of iron oxide black and iron oxide brown.
The novel magnetic flexible circuit board provided by the embodiment reduces manual operation posts, improves the assembly efficiency obviously, avoids wasting a large amount of manpower and materials, reduces the cost of the link, and improves the market competitiveness of the product
Example 3
Further optimizing the novel magnetic flexible circuit board provided in embodiment 1, specifically, as shown in fig. 4,5-1 and 5-2, the novel magnetic flexible circuit board 1 further includes an inner polyimide layer 13, copper foils 14 are disposed on two sides of the inner polyimide layer 13, a sinking foil 15 is disposed on the outer side of the copper foil 14, an outer polyimide layer 16 coated with an adhesive is disposed on the outer side of the sinking foil 15, an EMI layer 17 is disposed on the outer side of the outer polyimide layer 16, further, a copper leakage block 18 is disposed on the sinking foil 15, and a copper leakage block area 19 is formed by removing the outer polyimide layer 16 and the EMI layer 17 in the area where the copper leakage block 18 is located.
It should be further noted that the magnetic ink layer 110 is coated on the surface of the copper-leaking block 18, the thickness of the magnetic ink layer 110 in the copper-leaking block 19 is 50um-60um, and the magnetic ink layer 110 in the copper-leaking block 19 may be black, grey or brown, including at least one of black iron oxide and brown iron oxide. Further, the thickness of the magnetic ink layer 110 of the copper-leakage block region 19 is kept consistent with the thickness of the magnetic ink layer 110 of other regions.
Through the above structural design, the grounding effect of the flexible circuit board 1 and the backlight iron frame 21 is ensured, and static electricity is discharged.
It should be further noted that the coverage area of the magnetic ink layer 110 is the whole area or a part of the area on one side of the flexible circuit board 1, that is, the magnetic ink coverage area may be identical to the original double sided adhesive area, or may cover the back surface of the whole flexible circuit board 1, so that the flexible circuit board 1 is bent, aligned and adsorbed on the backlight iron frame 21.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.
Claims (10)
1. The utility model provides a novel magnetism flexible wiring board, includes flexible wiring board (1), it is bound in LCD module the below of LCD module is provided with backlight unit (2), be equipped with on backlight unit (2) and bear backlight unit's backlight frame (21), a serial communication port, flexible wiring board (1) include magnetic surface (11) and non-magnetic surface (12), magnetic surface (11) set up in flexible wiring board (1) are close to one side of backlight frame (21), non-magnetic surface (12) set up for the opposite side of flexible wiring board (1) of magnetic surface (11), magnetic surface (11) coating has magnetic ink layer (110), flexible wiring board (1) are buckled the back and are passed through magnetic surface (11) coated magnetic ink layer (110) are adsorbed and are fixed the surface of backlight frame (21).
2. The novel magnetic flexible circuit board according to claim 1, wherein the thickness of the magnetic ink layer (110) is 25um-35um.
3. The novel magnetic flexible circuit board according to claim 2, wherein the magnetic ink layer (110) is black or gray or brown.
4. The novel magnetic flexible circuit board according to claim 1, wherein the flexible circuit board (1) further comprises an inner polyimide layer (13), copper foils (14) are arranged on two sides of the inner polyimide layer (13), a sinking foil (15) is arranged on the outer side of the copper foil (14), an outer polyimide layer (16) coated with an adhesive is arranged on the outer side of the sinking foil (15), and an EMI layer (17) is arranged on the outer side of the outer polyimide layer (16).
5. The novel magnetic flexible circuit board according to claim 4, wherein a copper-leaking block (18) is provided on the submerged foil (15) on one side thereof.
6. The novel magnetic flexible circuit board according to claim 5, wherein the region where the copper leakage block (18) is located is removed from the outer polyimide layer (16) and the EMI layer (17) to form a copper leakage block region (19).
7. The novel magnetic flexible circuit board according to claim 6, wherein the magnetic ink layer (110) is coated on the surface of the copper-leaking block (18).
8. The novel magnetic flexible circuit board according to claim 7, wherein the thickness of the magnetic ink layer (110) in the copper-leaking block region (19) is 50um-60um, and the magnetic ink layer (110) in the copper-leaking block region (19) is black or gray or brown.
9. The novel magnetic flexible circuit board according to claim 8, wherein the thickness of the magnetic ink layer (110) of the copper-leaking block region (19) is kept consistent with the thickness of the magnetic ink layer (110) of other regions.
10. The novel magnetic flexible circuit board according to any one of claims 1 to 9, wherein the coverage area of the magnetic ink layer (110) is a whole area or a partial area of one side of the flexible circuit board (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320755293.9U CN220023187U (en) | 2023-04-06 | 2023-04-06 | Novel magnetic flexible circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320755293.9U CN220023187U (en) | 2023-04-06 | 2023-04-06 | Novel magnetic flexible circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220023187U true CN220023187U (en) | 2023-11-14 |
Family
ID=88674381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320755293.9U Active CN220023187U (en) | 2023-04-06 | 2023-04-06 | Novel magnetic flexible circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220023187U (en) |
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2023
- 2023-04-06 CN CN202320755293.9U patent/CN220023187U/en active Active
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