CN220252550U - Touch screen with ultraviolet light absorption function and optical enhancement function - Google Patents
Touch screen with ultraviolet light absorption function and optical enhancement function Download PDFInfo
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- CN220252550U CN220252550U CN202321142285.3U CN202321142285U CN220252550U CN 220252550 U CN220252550 U CN 220252550U CN 202321142285 U CN202321142285 U CN 202321142285U CN 220252550 U CN220252550 U CN 220252550U
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- 230000003287 optical effect Effects 0.000 title claims abstract description 39
- 230000031700 light absorption Effects 0.000 title claims abstract description 26
- 239000000758 substrate Substances 0.000 claims abstract description 119
- 239000012788 optical film Substances 0.000 claims abstract description 52
- 239000010408 film Substances 0.000 claims abstract description 40
- 239000011248 coating agent Substances 0.000 claims abstract description 38
- 238000000576 coating method Methods 0.000 claims abstract description 38
- 230000001681 protective effect Effects 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 239000012790 adhesive layer Substances 0.000 claims description 10
- 238000002835 absorbance Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 4
- 238000005253 cladding Methods 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 16
- 229920000307 polymer substrate Polymers 0.000 description 13
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 13
- 239000002346 layers by function Substances 0.000 description 8
- 239000012528 membrane Substances 0.000 description 8
- 229940124543 ultraviolet light absorber Drugs 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000003292 glue Substances 0.000 description 6
- QUAMTGJKVDWJEQ-UHFFFAOYSA-N octabenzone Chemical compound OC1=CC(OCCCCCCCC)=CC=C1C(=O)C1=CC=CC=C1 QUAMTGJKVDWJEQ-UHFFFAOYSA-N 0.000 description 6
- ZQBAKBUEJOMQEX-UHFFFAOYSA-N salicylic acid phenyl ester Natural products OC1=CC=CC=C1C(=O)OC1=CC=CC=C1 ZQBAKBUEJOMQEX-UHFFFAOYSA-N 0.000 description 6
- 239000011247 coating layer Substances 0.000 description 4
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- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- RKMGAJGJIURJSJ-UHFFFAOYSA-N 2,2,6,6-Tetramethylpiperidine Substances CC1(C)CCCC(C)(C)N1 RKMGAJGJIURJSJ-UHFFFAOYSA-N 0.000 description 3
- ZXDDPOHVAMWLBH-UHFFFAOYSA-N 2,4-Dihydroxybenzophenone Chemical compound OC1=CC(O)=CC=C1C(=O)C1=CC=CC=C1 ZXDDPOHVAMWLBH-UHFFFAOYSA-N 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 3
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- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical compound CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
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- 229910052759 nickel Inorganic materials 0.000 description 3
- DXGLGDHPHMLXJC-UHFFFAOYSA-N oxybenzone Chemical compound OC1=CC(OC)=CC=C1C(=O)C1=CC=CC=C1 DXGLGDHPHMLXJC-UHFFFAOYSA-N 0.000 description 3
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 3
- GDESWOTWNNGOMW-UHFFFAOYSA-N resorcinol monobenzoate Chemical compound OC1=CC=CC(OC(=O)C=2C=CC=CC=2)=C1 GDESWOTWNNGOMW-UHFFFAOYSA-N 0.000 description 3
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- 230000006750 UV protection Effects 0.000 description 1
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- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
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Abstract
The utility model discloses a touch screen with an ultraviolet light absorption function and an optical enhancement function, which comprises a touch substrate and an optical film, wherein the optical film is attached to one side surface of the touch substrate, the optical film comprises an ultraviolet light absorption substrate and an optical enhancement coating, the ultraviolet light absorption substrate is attached to one side surface of the touch substrate, and the optical enhancement coating is attached to the other side surface of the ultraviolet light absorption substrate, which is back to the touch substrate. The touch screen has the ultraviolet light absorption function and the optical enhancement function, and the film structure is less.
Description
Technical Field
The present disclosure relates to touch technology, and more particularly, to a touch screen with both ultraviolet absorption and optical enhancement.
Background
The most commonly used touch screen is a capacitive touch screen, and the capacitive touch screen technology works by utilizing current induction of a human body and has the advantages of being simple and convenient to operate, supporting multi-point touch control and the like. With the development of information technology, the optical requirements of people on touch screens are higher and higher, and the touch screens are required to have low reflection, high transmittance, fingerprint resistance and other performances. For this reason, manufacturers often attach optical films such as a low reflection film, an antiglare film, and the like to the surface of the touch screen to improve the optical performance of the touch screen. For example, chinese patent No. CN201811237008.4 discloses a touch screen, which includes: an optical film layer, an optical adhesive layer and a glass sensor; the first conductive surface of the glass sensor is connected with a flexible circuit board; the optical film layer is in fit connection with the first conductive surface of the glass sensor through the optical adhesive layer; wherein, the optical film layer specifically includes: any one of an AR film layer, an AF film layer, an AG film layer, a tempered film layer or a combined optical film comprising at least two optical films.
In addition, in order to prevent the ITO circuit in the touch screen from being aged due to long-term exposure to ultraviolet rays, some touch screens are also attached with an ultraviolet-proof film on the surface. For example, chinese patent No. CN202123089361.2 discloses an AG ultraviolet-proof mobile phone film, which comprises a body, the body includes a surface layer film, an antireflection film is provided on the lower surface of the surface layer film, an ultraviolet-proof film is provided on the lower surface of the antireflection film, an AG film is provided on the lower surface of the ultraviolet-proof film, a bottom film is provided on the lower surface of the AG film, and a heat conducting film is provided on the lower surface of the bottom film. This patent is through setting up this anti-reflection film, anti ultraviolet membrane and AG membrane, can be when the anti reflection effect of reinforcing cell-phone membrane self, and the anti ultraviolet membrane can cooperate with the AG membrane, has improved the ultraviolet resistance of this cell-phone membrane greatly to this weakens the harm of cell-phone ultraviolet ray to the human body, has still arranged the heat conduction membrane simultaneously, can improve the radiating effect of cell-phone membrane, further strengthens the radiating effect to the cell-phone, avoids the cell-phone overheated.
Such multiple optical films are attached to the surface of the touch screen of the patent, each optical film is provided with a layer of PET film as a substrate, the overall thickness of the product can be increased undoubtedly, besides the touch sensitivity can be influenced, the transmittance of the touch screen can be reduced, the display effect of the display screen is further influenced, and in addition, the more the optical films are, the lower the attaching yield is.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model provides the touch screen which has the ultraviolet light absorption function and the optical enhancement function and has a small film structure.
The technical problems to be solved by the utility model are realized by the following technical scheme:
the utility model provides a have touch screen of ultraviolet absorbance function and optics enhancement function concurrently, includes touch substrate and optical film, optical film laminating in on the side of touch substrate, optical film includes ultraviolet absorbance substrate and optics enhancement cladding material, ultraviolet absorbance substrate laminating in on the side of touch substrate, optics enhancement cladding material is attached to the ultraviolet absorbance substrate is dorsad on the other side of touch substrate.
Further, the ultraviolet absorbing substrate comprises a polymeric substrate and an ultraviolet absorber doped in the polymeric substrate.
Further, the ultraviolet light absorber accounts for 1.0-2.5% of the ultraviolet light absorbing substrate by mass.
Further, the polymer substrate includes at least one of a PET substrate, a PE substrate, a PV substrate, and a PI substrate.
Further, the ultraviolet light absorber includes at least one of phenyl o-hydroxybenzoate, 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole, 2, 4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 2- (2 '-hydroxy-3', 5 '-di-tert-phenyl) -5-chlorobenzotriazole, resorcinol monobenzoate, 2' -thiobis (4-tert-octylphenol oxy) nickel, tris (1, 2, 6-pentamethylpiperidyl) phosphite, and 4-benzoyloxy-2, 6-tetramethylpiperidine.
Further, a transparent adhesive layer is arranged between the touch substrate and the optical film, and the optical film is attached to one side surface of the touch substrate through the transparent adhesive layer.
Further, the optical enhancement coating includes at least one of an AR coating, an AG coating, an AF coating, and an HC coating.
Further, the touch screen also comprises a protective film, wherein the protective film is attached to the other side surface of the optical film, which is opposite to the touch substrate.
Further, the protective film is self-adhesive toward a side of the optical film.
Further, the touch substrate is an OGS touch substrate or a GG touch substrate.
The utility model has the following beneficial effects: the touch screen directly deposits the optical enhancement coating on the ultraviolet light absorption substrate with the ultraviolet light absorption function to form the optical film with the ultraviolet light absorption function and the optical enhancement function, and replaces the common optical film which adopts the PET film as the substrate in the prior art, so that the ultraviolet light absorption function of the optical film can be increased without additionally attaching the ultraviolet light absorption film on the touch substrate, the aging of an ITO circuit in the touch substrate under the long-term irradiation of ultraviolet rays can be prevented, the stability of the touch substrate is improved, the number of film layers on the surface of the touch substrate can be reduced, and the influence on the touch sensitivity and the display effect is reduced.
Drawings
Fig. 1 is a schematic diagram of a stack according to the present utility model.
Fig. 2 is a schematic stacking diagram of another touch screen according to the present utility model.
Fig. 3 is a schematic plan view of an OGS touch substrate in a touch screen according to the present utility model.
Fig. 4 is an exploded schematic view of a GG touch substrate in a touch screen according to the present utility model.
Detailed Description
The present utility model is described in detail below with reference to the drawings and the embodiments, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", or a third "may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, or can be communicated between two elements or the interaction relationship between the two elements. 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.
Example 1
As shown in fig. 1, a touch screen with both an ultraviolet light absorption function and an optical enhancement function comprises a touch substrate 1 and an optical film 3, wherein the optical film 3 is attached to one side surface of the touch substrate 1, the optical film 3 comprises an ultraviolet light absorption substrate 31 and an optical enhancement coating 32, the ultraviolet light absorption substrate 31 is attached to one side surface of the touch substrate 1, and the optical enhancement coating 32 is attached to the other side surface of the ultraviolet light absorption substrate 31 opposite to the touch substrate 1.
The touch screen directly sputtering and attaching the optical enhancement coating 32 on the ultraviolet light absorption substrate 31 with the ultraviolet light absorption function to form the optical film 3 with the ultraviolet light absorption function and the optical enhancement function, instead of a common optical film with a common PET film as a substrate in the prior art, the ultraviolet light absorption function of the optical film 3 can be increased without additionally attaching an ultraviolet-proof film to the touch substrate 1, so that the aging of an ITO circuit in the touch substrate 1 under the long-term irradiation of ultraviolet rays can be prevented, the stability of the touch substrate 1 is improved, the number of film layers on the surface of the touch substrate 1 can be reduced, and the influence on the touch sensitivity and the display effect is reduced.
The ultraviolet light absorbing substrate 31 includes a polymer substrate 311 and an ultraviolet light absorber 312 doped in the polymer substrate 311, when in manufacture, the polymer substrate 311 is heated and melted, the ultraviolet light absorber 312 is uniformly mixed in a certain proportion in the polymer substrate 311 in a molten state, then the polymer substrate 311 mixed with the ultraviolet light absorber 312 is extruded into a film-shaped ultraviolet light absorbing substrate 31 by an injection mold through a melt extrusion method, after cooling and shaping, an optical enhancement material is sputtered on the ultraviolet light absorbing substrate 31 to form an optical film 3 with both ultraviolet light absorbing function and optical enhancement function, and finally the optical film is cut to a required size and attached to the touch substrate 1.
The ultraviolet absorber 312 is about 1.0% -2.5% by mass of the ultraviolet absorbing substrate 31, the polymer substrate 311 comprises at least one of PET substrate, PE substrate, PV substrate and PI substrate, and the ultraviolet absorber 312 comprises at least one of phenyl o-hydroxybenzoate, 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole, 2, 4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 2- (2 '-hydroxy-3', 5 '-di-tert-phenyl) -5-chlorobenzotriazole, resorcinol monobenzoate, 2' -thiobis (4-tert-octylphenoloxy) nickel, tris (1, 2, 6-pentamethylpiperidyl) phosphite and 4-benzoyloxy-2, 6-tetramethylpiperidine.
The optical enhancement coating 32 includes at least one of an AR coating, an AG coating, an AF coating, and an HC coating. The AR coating is used for reducing the reflectivity of the surface of the touch substrate 1 and improving the contrast, the AF coating is used for forming microstructures on the surface of the touch substrate 1 for preventing water drops, fingerprints and the like from adhering, the AG coating is used for forming diffuse reflection microstructures on the surface of the touch substrate 1 so as to reduce the surface glare of the touch substrate 1, and the HC coating is used for improving the surface hardness of the touch substrate 1 and preventing the surface of the touch substrate 1 from being scratched by hard objects.
The AF coating layer has a surface microstructure to prevent water drops and fingerprints, and therefore needs to be located at the outermost layer when used in combination with other optical enhancement coating layers 32.
A transparent adhesive layer 2 is arranged between the touch substrate 1 and the optical film 3, and the optical film 3 is attached to one side surface of the touch substrate 1 through the transparent adhesive layer 2.
The transparent glue layer 2 may be, but is not limited to, OCA glue or OCZ glue.
Example two
As shown in fig. 2, a touch screen with both ultraviolet light absorption function and optical enhancement function comprises a touch substrate 1, an optical film 3 and a protective film 4, wherein the optical film 3 is attached to one side surface of the touch substrate 1, and the protective film 4 is attached to the other side surface of the optical film 3, which is opposite to the touch substrate 1; the optical film 3 comprises an ultraviolet light absorbing substrate 31 and an optical enhancement coating 32, wherein the ultraviolet light absorbing substrate 31 is attached to one side surface of the touch substrate 1, and the optical enhancement coating 32 is attached to the other side surface of the ultraviolet light absorbing substrate 31, which is opposite to the touch substrate 1.
Compared with the first embodiment, the touch screen of the present embodiment is provided with the protective film 4 on the upper surface of the optical film 3, and the protective film 4 is used to protect the optical enhancement coating 32 on the optical film 3, so as to prevent the optical enhancement coating 32 from being scratched due to direct contact with foreign objects.
The protective film 4 may be, but is not limited to, a PI protective film, a PV protective film, a PET protective film, or a PE protective film, which is self-adhesive (another PSA adhesive on the side) toward one side of the optical film 3.
The ultraviolet light absorbing substrate 31 includes a polymer substrate 311 and an ultraviolet light absorber 312 doped in the polymer substrate 311, when in manufacture, the polymer substrate 311 is heated and melted, the ultraviolet light absorber 312 is uniformly mixed in a certain proportion in the polymer substrate 311 in a molten state, then the polymer substrate 311 mixed with the ultraviolet light absorber 312 is extruded into a film-shaped ultraviolet light absorbing substrate 31 by an injection mold through a melt extrusion method, after cooling and shaping, an optical enhancement material is sputtered on the ultraviolet light absorbing substrate 31 to form an optical film 3 with both ultraviolet light absorbing function and optical enhancement function, and finally the optical film 3 is cut to a required size and attached to the touch substrate 1.
The ultraviolet absorber 312 is about 1.0% -2.5% by mass of the ultraviolet absorbing substrate 31, the polymer substrate 311 comprises at least one of PET substrate, PE substrate, PV substrate and PI substrate, and the ultraviolet absorber 312 comprises at least one of phenyl o-hydroxybenzoate, 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole, 2, 4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 2- (2 '-hydroxy-3', 5 '-di-tert-phenyl) -5-chlorobenzotriazole, resorcinol monobenzoate, 2' -thiobis (4-tert-octylphenoloxy) nickel, tris (1, 2, 6-pentamethylpiperidyl) phosphite and 4-benzoyloxy-2, 6-tetramethylpiperidine.
The optical enhancement coating 32 includes at least one of an AR coating, an AG coating, an AF coating, and an HC coating. The AR coating is used for reducing the reflectivity of the surface of the touch substrate 1 and improving the contrast, the AF coating is used for forming microstructures on the surface of the touch substrate 1 for preventing water drops, fingerprints and the like from adhering, the AG coating is used for forming diffuse reflection microstructures on the surface of the touch substrate 1 so as to reduce the surface glare of the touch substrate 1, and the HC coating is used for improving the surface hardness of the touch substrate 1 and preventing the surface of the touch substrate 1 from being scratched by hard objects.
The AF coating layer has a surface microstructure to prevent water drops and fingerprints, and therefore needs to be located at the outermost layer when used in combination with other optical enhancement coating layers 32.
A transparent adhesive layer 2 is arranged between the touch substrate 1 and the optical film 3, and the optical film 3 is attached to one side surface of the touch substrate 1 through the transparent adhesive layer 2.
The transparent glue layer 2 may be, but is not limited to, OCA glue or OCZ glue.
Example III
As an optimization scheme of the first embodiment or the second embodiment, in this embodiment, the touch substrate 1 is an OGS touch substrate or a GG touch substrate.
As shown in fig. 3, the OGS touch substrate includes a transparent substrate 11 and a touch functional layer disposed on the other side surface of the transparent substrate 11 facing away from the optical film 3; the touch functional layer includes a plurality of first touch electrodes 121 extending along a transverse direction and arranged along a longitudinal direction, and a plurality of second touch electrodes 141 extending along the longitudinal direction and arranged along the transverse direction, wherein the plurality of first touch electrodes 121 and the plurality of second touch electrodes 141 are crisscrossed; each first touch electrode 121 is in a connection structure at the staggered position, each second touch electrode 141 is in a disconnection structure at the staggered position and is connected through a corresponding metal bridge 16, and an insulating bridge 15 is arranged between each metal bridge 16 and the corresponding first touch electrode 121 at intervals.
As shown in fig. 4, the GG touch substrate includes a transparent substrate 11, a first touch functional layer 12 disposed on the other side surface of the transparent substrate 11 facing away from the optical film 3, an insulating material layer 13 disposed on the other side surface of the first touch functional layer 12 facing away from the transparent substrate 11, and a second touch functional layer 14 disposed on the other side surface of the insulating material layer 13 facing away from the first touch functional layer 12; the first touch functional layer 12 includes a plurality of first touch electrodes 121 extending along a lateral direction and arranged along a longitudinal direction, the second touch functional layer 14 includes a plurality of second touch electrodes 141 extending along a longitudinal direction and arranged along a lateral direction, and the plurality of first touch electrodes 121 and the plurality of second touch electrodes 141 are staggered in space.
The transparent substrate 11 may be, but is not limited to, a glass substrate, a plastic substrate, a sapphire substrate, or the like.
Finally, it should be noted that the foregoing embodiments are merely for illustrating the technical solution of the embodiments of the present utility model and are not intended to limit the embodiments of the present utility model, and although the embodiments of the present utility model have been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the embodiments of the present utility model may be modified or replaced with the same, and the modified or replaced technical solution may not deviate from the scope of the technical solution of the embodiments of the present utility model.
Claims (6)
1. The utility model provides a have touch screen of ultraviolet absorbance function and optics enhancement function concurrently, includes touch substrate and optical film, optical film laminating in on the side of touch substrate, its characterized in that, optical film includes ultraviolet absorbance substrate and optics enhancement cladding material, ultraviolet absorbance substrate laminating in on the side of touch substrate, optics enhancement cladding material is attached to the ultraviolet absorbance substrate is dorsad on the other side of touch substrate.
2. The touch screen with both ultraviolet light absorption and optical enhancement functions according to claim 1, wherein a transparent adhesive layer is arranged between the touch substrate and the optical film, and the optical film is attached to one side surface of the touch substrate through the transparent adhesive layer.
3. The touch panel having both ultraviolet light absorbing and optical enhancement functions according to claim 1, wherein the optical enhancement coating comprises at least one of an AR coating, an AG coating, an AF coating, and an HC coating.
4. The touch screen with both ultraviolet light absorption and optical enhancement functions according to claim 1, further comprising a protective film attached to the other side of the optical film facing away from the touch substrate.
5. The touch screen with both ultraviolet light absorption and optical enhancement functions according to claim 4, wherein the protective film is self-adhesive toward a side of the optical film.
6. The touch screen with both ultraviolet light absorption and optical enhancement functions according to claim 1, wherein the touch substrate is an OGS touch substrate or a GG touch substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321142285.3U CN220252550U (en) | 2023-05-11 | 2023-05-11 | Touch screen with ultraviolet light absorption function and optical enhancement function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321142285.3U CN220252550U (en) | 2023-05-11 | 2023-05-11 | Touch screen with ultraviolet light absorption function and optical enhancement function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220252550U true CN220252550U (en) | 2023-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321142285.3U Active CN220252550U (en) | 2023-05-11 | 2023-05-11 | Touch screen with ultraviolet light absorption function and optical enhancement function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220252550U (en) |
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2023
- 2023-05-11 CN CN202321142285.3U patent/CN220252550U/en active Active
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