CN220455661U - Curtain device and vehicle - Google Patents
Curtain device and vehicle Download PDFInfo
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- CN220455661U CN220455661U CN202322096822.1U CN202322096822U CN220455661U CN 220455661 U CN220455661 U CN 220455661U CN 202322096822 U CN202322096822 U CN 202322096822U CN 220455661 U CN220455661 U CN 220455661U
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- Curtains And Furnishings For Windows Or Doors (AREA)
Abstract
The utility model provides a curtain device and a vehicle, relates to the technical field of vehicles, and is used for solving the problems of poor definition and uniformity and poor projection effect of projection picture display on a curtain projected by a curtain in the related art. The curtain device is installed in the passenger cabin of vehicle, the curtain device includes base subassembly, spool subassembly and projection curtain, base subassembly is used for being fixed inside the vehicle, spool subassembly installs on base subassembly, spool subassembly includes the pivot, projection curtain is reeled in the pivot retractably, projection curtain includes reflection stratum and reflector layer, reflection stratum and reflector layer are located the different lateral surfaces of projection curtain respectively, the light reflectivity of reflector layer is greater than the light reflectivity of reflection stratum, the spool is constructed when the projection curtain is expanded, make reflection stratum and reflector layer select one side to the passenger cabin inboard, can improve the projecting effect of in-vehicle curtain projection.
Description
Technical Field
The utility model relates to the technical field of vehicles, in particular to a curtain device and a vehicle.
Background
Vehicles have become an indispensable transportation means for people's daily lives, and entertainment modes in vehicles have an optimizing and promoting effect on passengers' riding experiences, wherein entertainment modes include viewing of on-board movies.
In the related art, a curtain projection technology combining a curtain and a projector is used for video playback in a vehicle.
However, since the vehicle is often located outdoors, the lighting in the vehicle is greatly affected by outdoor light, the light and shade change of the light in the vehicle is large, the definition and uniformity of the projection screen display on the curtain projected by the curtain in the related art are poor, and the projection effect is poor.
Disclosure of Invention
The utility model provides a curtain device and a vehicle, which are used for improving the projection effect of the curtain projection in the vehicle.
In order to achieve the above object, the present utility model provides the following technical solutions:
the first aspect of the present utility model provides a curtain device installed in a passenger cabin of a vehicle, the curtain device includes a base component, a spool component and a projection curtain, the base component is used to be fixed in the vehicle, the spool component is installed on the base component, the spool component includes a rotating shaft, the projection curtain is winded on the rotating shaft in a retractable manner, the projection curtain includes a reflective layer and a reflective layer, the reflective layer and the reflective layer are respectively located on different side surfaces of the projection curtain, the light reflectivity of the reflective layer is greater than the light reflectivity of the reflective layer, and when the spool is configured to be unfolded by the projection curtain, the reflective layer and the reflective layer face the inner side of the passenger cabin alternatively.
The curtain device provided by the embodiment of the utility model has at least the following beneficial effects:
in the use process of the vehicle, the reflecting layer and the reflecting layer are arranged in a stacked manner, so that a double-sided structure with different reflection effects on light is formed on the curtain, a user can use one side of the reflecting layer with stronger light reflection capability of the curtain as a projection surface in the daytime with stronger light, the projection pain point is reduced, and compared with the conventional polymer curtain in the related art, the projection effect is remarkably improved; in addition, the projection curtain provided with the reflecting layer is used in daytime with strong light, and has good sun shading, sun screening and privacy protection effects on passengers in the vehicle.
In one possible implementation, the light reflective layer comprises a light reflective coating or film.
In one possible implementation, the thickness of the light-reflective coating is 1 to 10 microns; the reflective film is a multilayer film, and the thickness of each layer is 5-20 microns.
In one possible implementation, the reflective coating includes a polymeric substrate layer, a metallic reflective layer, a multilayer dielectric film anti-reflective layer, and a transparent polymeric protective layer.
In one possible implementation manner, the reflective layer is a polymer plastic layer, and the reflective layer further includes a reflective cloth layer, where the reflective cloth layer is a polyvinyl chloride reflective cloth layer, a polyethylene terephthalate reflective cloth layer, an aluminum foil reflective cloth layer, a glass bead reflective cloth layer, and/or an optical fiber reflective cloth layer.
In one possible implementation, the base assembly includes a curtain cylinder and support assemblies fixed at two ends of the curtain cylinder, the curtain cylinder is connected with the reel assembly, an inner cavity of the curtain cylinder is used for accommodating the projection curtain, the curtain cylinder has a winding opening communicated with the inner cavity, and the projection curtain is wound and unwound by the winding opening.
In one possible implementation manner, the scroll assembly further comprises an elastic connection unit, the rotating shaft is rotatably arranged in the inner cavity of the curtain cylinder, and the top end of the projection curtain is fixed on the rotating shaft and is wound on the rotating shaft when being retracted or is in an unfolding state when being released;
the elastic connection unit is connected between the rotating shaft and the base assembly and is elastically connected with the rotating shaft, and the elastic connection unit is configured to elastically drive the rotating shaft to rotate so as to release the projection curtain.
In one possible implementation, the rotation axis is a bidirectional rotation axis, so that the reflective layer or the reflective layer faces the inner side of the passenger compartment when the projection curtain is unfolded by rotation of the rotation axis in two directions.
In one possible implementation, the reel assembly further includes a weight bar connected to a bottom end of the projection screen; the counter weight pole surface interval is equipped with a plurality of sucking discs, is used for fixed the bottom of projection curtain.
A second aspect of the present utility model provides a vehicle comprising a curtain device provided in any one of the above claims disposed in a passenger compartment.
The second aspect of the present utility model provides substantially the same advantages as the first aspect of the present utility model, and will not be described in detail herein.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a curtain device according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a projection curtain including a reflective layer and a light reflecting layer in a curtain device according to an embodiment of the present utility model.
Reference numerals illustrate:
a 100-base assembly;
110-curtain cylinder; 120-a support assembly;
200-a reel assembly;
210-a rotating shaft; 220-a weight bar;
300-projecting a curtain;
310-a reflective layer; 320-light reflecting layer.
Detailed Description
As described in the background art, watching a movie on a vehicle has become a major entertainment activity for occupants in a vehicle, and in the related art, there is a problem in that the display definition and uniformity of a projection screen on a projection screen projected by the vehicle screen are poor and the projection effect is poor. The inventor researches find that the cause of the problem is mainly that: the vehicle is often located the open air, and the daylighting is influenced by outdoor light greatly in the car, and light's light and shade change is great in the car, and then leads to the projection pain point on the projection curtain more, and wherein, projection pain point influences the problem of projection quality promptly, including the light and shade contrast ratio of the projection image under the interference of light is not enough, projection size and proportion degree of accuracy are not enough, projection position and/or the problem of angle degree of accuracy is not enough.
It should be noted that the projection screen may be mounted on top of a front windshield or above a ceiling in a vehicle, may be mounted behind a seat, and may be mounted in the area of a center console, for example, above an instrument panel or adjacent to an embedded display screen.
In view of the above technical problems, in the use process of a vehicle, the embodiments of the present utility model provide a curtain device, in which a double-sided structure with different reflection effects on light is formed on a curtain by stacking a reflective layer and a reflective layer, so that a user can use one side of the reflective layer with stronger light reflection capability of the curtain as a projection surface in the daytime with stronger light, thereby reducing projection pain points, and significantly improving projection effects compared with conventional polymer material curtains in related art; in addition, the projection curtain provided with the reflecting layer is used in daytime with strong light, and has good sun shading, sun screening and privacy protection effects on passengers in the vehicle.
In order to make the above objects, features and advantages of the embodiments of the present utility model more comprehensible, the technical solutions of the embodiments of the present utility model will be described clearly and completely with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. 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.
In a first aspect, an embodiment of the present utility model provides a curtain device installed in a passenger cabin of a vehicle, and referring to fig. 1 and 2, the curtain device includes a base assembly 100, a spool assembly 200, and a projection curtain 300, the base assembly 100 is used to be fixed in the vehicle, the spool assembly 200 is installed on the base assembly 100, the spool assembly 200 includes a rotating shaft 210, the projection curtain 300 is retractably wound around the rotating shaft 210, the projection curtain 300 includes a reflective layer 310 and a reflective layer 320, the reflective layer 310 and the reflective layer 320 are respectively located on different side surfaces of the projection curtain 300, the light reflectivity of the reflective layer 320 is greater than the light reflectivity of the reflective layer 310, and when the spool is configured to extend the projection curtain 300, the reflective layer 310 and the reflective layer 320 are alternatively oriented toward the passenger cabin.
In this way, in the use process of the vehicle, the reflective layer 310 and the reflective layer 320 which are stacked form a double-sided structure with different reflection effects on the light on the curtain, so that a user can use one side of the reflective layer 320 with stronger light reflection capability of the curtain as a projection surface in the daytime with stronger light, thereby reducing the projection pain point, and remarkably improving the projection effect compared with the conventional polymer curtain in the related art; in addition, the projection curtain 300 provided with the reflective layer 320 is used in daytime with strong light, and has good sun-shading and sun-screening effects and privacy protection effects for passengers in the vehicle.
In some embodiments, the light reflecting layer 320 includes a light reflecting coating or film, and thus, by the light reflecting coating or film composed of a plurality of optical films, the reflectivity of the light reflecting layer 320 can be increased and the distribution of light on the light reflecting layer 320 can be controlled to obtain a better projection effect.
In more possible embodiments, the thickness of the retroreflective coating is from 1 micron to 10 microns, for example, the thickness of the retroreflective coating is 1 micron or 5 microns or 10 microns; the reflective film is a multilayer film, each layer has a thickness of 5-20 micrometers, for example, the reflective film is a three-layer film, each layer has a thickness of 5 micrometers, and in another example, the reflective film is a double-layer film, each layer has a thickness of 20 micrometers, so that the problems of multiple reflection and light scattering caused by excessively thick coating on the basis of ensuring higher reflectivity than the common plastic reflective layer 310 and reducing the contrast and definition of the projected image can be realized by the reflective coating or the reflective film within a specific thickness range.
As an example, the reflective coating includes a polymer substrate layer, a metal reflective layer, a multi-layer dielectric film anti-reflective layer, and a transparent polymer protective layer, where the polymer substrate layer is a polyester layer or a carbonate layer, to provide structural support and protection for the reflective coating, the metal reflective layer is an aluminum layer, a silver layer, or a silver-plated layer, to increase the reflectivity of the curtain, the multi-layer dielectric film anti-reflective layer is an oxide layer or a fluoride layer, to reduce excessive reflection and scattering on the surface of the projection curtain 300, to increase the image contrast and clarity, and the transparent polymer protective layer is disposed on the outermost layer of the reflective coating, which may be a transparent polymer material, to protect the reflective layer and the anti-reflective layer from wiping or corrosive environmental damage.
In still another example, the reflective layer 310 is a polymer plastic layer, and illustratively, the reflective layer 310 is a white plastic layer, which may be polyvinyl chloride, polyethylene or polypropylene, and can be used as a projection surface of the in-vehicle projection curtain 300 when outdoor light is weak at night, so as to uniformly and effectively display a projection image and provide a good visual effect.
Further, the light reflecting layer 320 further includes a light reflecting layer, which is a polyvinyl chloride light reflecting layer, a polyethylene terephthalate light reflecting layer, an aluminum foil light reflecting layer, a glass bead light reflecting layer, and/or an optical fiber light reflecting layer, and illustratively, the light reflecting layer is a glass bead light reflecting layer having a glass bead coating layer, wherein a plurality of minute glass beads are capable of reflecting light, thereby improving reflectivity and light distribution uniformity of the light reflecting layer, and further improving definition of a projected image; in another example, the reflective fabric layer is an optical fiber reflective fabric layer, which is made of an optical fiber material, and can efficiently guide the projection light to the surface of the projection curtain 300, so that the reflective fabric layer not only has higher reflectivity and light distribution uniformity, but also can realize a large projection area, and is suitable for large-size vehicle models.
On the basis of the above embodiment, it may be improved that the base assembly 100 includes a curtain cylinder 110 and support assemblies 120 fixed at two ends of the curtain cylinder 110, for example, the support assemblies 120 may be two bolts disposed at two ends of the curtain cylinder 110, the curtain cylinder 110 is fixed at the upper part of a front windshield, a rear windshield, a roof or a rear seat of a vehicle by matching two bolts with a preset threaded hole, the curtain cylinder 110 is connected with the reel assembly 200, and illustratively, the curtain cylinder 110 is connected with the rotating shaft 210 in a nested manner, that is, the end of the curtain cylinder 110 is in a shape matched with the rotating shaft 210, so that the rotating shaft 210 may be nested inside the curtain cylinder 110, and a tenon or a cam may be used to ensure a stable connection between the rotating shaft 210 and the curtain cylinder 110 and not to affect the rotation performance of the rotating shaft 210; the curtain cylinder 110 and the rotating shaft 210 can be fixed through a locking device, the locking device can be a threaded nut, a pin or a clamp, and the tightness of the locking device is adjusted, so that the curtain cylinder 110 and the rotating shaft 210 can be fixed and released.
The inner chamber of curtain section of thick bamboo 110 is used for holding projection curtain 300, and curtain section of thick bamboo 110 has the receipts mouth of rolling with the inner chamber intercommunication, and after curtain section of thick bamboo 110 was fixed in the car, its rolling mouth was towards the vehicle bottom, and projection curtain 300 is receive and releases by the rolling mouth.
In other possible embodiments, the spool assembly 200 further includes an elastic connection unit, the rotating shaft 210 is rotatably disposed in the inner cavity of the curtain cylinder 110, the top end of the projection curtain 300 is fixed to the rotating shaft 210, for example, the top end of the projection curtain 300 is fixed to the rotating shaft 210 by a clamping device, and also can be fixed to the rotating shaft 210 by an adhesive or glue bonding manner, so as to ensure the connection stability of the projection curtain 300 and the rotating shaft 210; the projection screen 300 is wound around the rotation shaft 210 when being retracted or in an expanded state when being released, and an elastic connection unit is connected between the rotation shaft 210 and the base assembly 100 and is elastically connected with the rotation shaft 210, and is configured to rotate by elastically driving the rotation shaft 210 to release the projection screen 300, and illustratively, the elastic connection unit includes a spring and a spring tension rod connected between the spring and the rotation shaft 210, and is configured to transmit an elastic force to the rotation shaft 210 when the spring is stretched or twisted, i.e., the spring is in a compressed state when the projection screen 300 is retracted, and the spring can be released by manually or electrically controlling the release of the spring and transmitting the elastic force of the released projection screen 300 by the spring tension rod.
As a possible implementation, the rotating shaft 210 is a bidirectional rotating shaft, so that when the projection curtain 300 is unfolded by rotating the rotating shaft in two directions, the reflective layer 310 or the reflective layer 320 faces the inner side of the passenger cabin, so that the passenger can adjust the projection surface of the projection curtain 300 according to the intensity of the light in the vehicle, and the projection curtain 300 can realize bidirectional adjustment of the winding state and the unfolding state of the projection curtain relative to the rotating shaft 210, and the flexibility and the controllability of the spool assembly 200 are improved compared with the unidirectional rotating shaft, and the bidirectional rotating shaft is a gear type bidirectional rotating shaft or an electric bidirectional rotating shaft, for example, the rotating accuracy is higher.
On the basis of the above embodiment, it may be improved that the reel assembly 200 further includes a weight rod 220, which may be a metal weight rod 220 or a plastic weight rod 220, and the weight rod 220 is connected to the bottom end of the projection curtain 300 in a plug-in connection or a screw connection, wherein the bottom end of the plug-in connection, i.e. the weight rod 220, is provided with a protrusion, which may be directly inserted into a weight slot or a jack at the bottom of the projection curtain 300, and the two are simply and conveniently connected firmly, and the screw connection, i.e. the bottom end of the weight rod 220 is in a spiral shape, and is matched with a screw hole preset at the bottom of the projection curtain 300, so that the weight rod 220 is screwed into the screw hole to be fixed.
Further, the surface of the weight lever 220 is provided with a plurality of suckers at intervals, which are used for fixing the bottom end of the projection curtain 300, and providing the projection curtain 300 with adhesive force and supporting force on the inner surface of the vehicle body, so as to prevent the weight lever 220 from moving or sliding when the projection curtain 300 is unfolded and folded, improve the balance stability of the projection curtain 300, and prevent the projection curtain 300 from deviating or tilting when the vehicle-mounted movie is watched.
In some examples, the suction cup is a rubber suction cup, a silica gel suction cup or a vacuum suction cup, for example, four vacuum suction cups are arranged on the surface of the counterweight rod 220 on one side facing the vehicle bottom at equal intervals, when the projection curtain 300 is put down, the suction cup can be fixed on the ground of the bottom in the vehicle, and the suction cup is firmly attached to the ground by utilizing vacuum force through a negative pressure area formed between the vacuum suction cup and the ground, so that the adsorption reliability is enhanced.
The curtain device provided by the embodiment of the utility model has at least the following beneficial effects:
in the use process of the vehicle, the reflecting layer and the reflecting layer are arranged in a stacked manner, so that a double-sided structure with different reflection effects on light is formed on the curtain, a user can use one side of the reflecting layer with stronger light reflection capability of the curtain as a projection surface in the daytime with stronger light, the projection pain point is reduced, and compared with the conventional polymer curtain in the related art, the projection effect is remarkably improved; in addition, the projection curtain provided with the reflecting layer is used in daytime with strong light, and has good sun shading, sun screening and privacy protection effects on passengers in the vehicle.
In a second aspect, an embodiment of the present utility model provides a vehicle, including the curtain device provided in the passenger cabin according to any one of the embodiments of the first aspect, where the benefits include all the benefits of the first aspect.
In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying 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 thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, 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" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
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; can be mechanically or electrically connected; 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.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In this specification, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
1. The utility model provides a curtain device, its characterized in that, the curtain device is installed in the passenger cabin of vehicle, the curtain device includes base subassembly, spool subassembly and projection curtain, the base subassembly is used for being fixed inside the vehicle, the spool subassembly is installed on the base subassembly, the spool subassembly includes the pivot, projection curtain retractably coil in the pivot, the projection curtain includes reflector layer and reflector layer, the reflector layer with the reflector layer is located respectively the different lateral surface of projection curtain, the light reflectivity of reflector layer is greater than the light reflectivity of reflector layer, the spool is constructed when the projection curtain is expanded, makes the reflector layer with the reflector layer alternative face the passenger cabin is inboard.
2. The curtain device of claim 1, wherein the light reflective layer comprises a light reflective coating or film.
3. The curtain device of claim 2, wherein the reflective coating has a thickness of 1 micron to 10 microns; the reflective film is a multilayer film, and the thickness of each layer is 5-20 microns.
4. The curtain device of claim 2 or 3, wherein the reflective coating comprises a polymeric substrate layer, a metallic reflective layer, a multilayer dielectric film anti-reflective layer, and a transparent polymeric protective layer.
5. The curtain device of claim 1, wherein the reflective layer is a polymeric plastic layer, the reflective layer further comprises a reflective cloth layer, and the reflective cloth layer is a polyvinyl chloride reflective cloth layer, a polyethylene terephthalate reflective cloth layer, an aluminum foil reflective cloth layer, a glass bead reflective cloth layer, and/or an optical fiber reflective cloth layer.
6. The curtain device of claim 1, wherein the base assembly comprises a curtain tube and support assemblies fixed at two ends of the curtain tube, the curtain tube is connected with the reel assembly, an inner cavity of the curtain tube is used for accommodating the projection curtain, the curtain tube is provided with a winding opening communicated with the inner cavity, and the projection curtain is wound and unwound by the winding opening.
7. The curtain device of claim 6, wherein the spool assembly further comprises an elastic connection unit, the rotating shaft is rotatably disposed in the inner cavity of the curtain cylinder, and the top end of the projection curtain is fixed to the rotating shaft and is wound on the rotating shaft when retracted or is in an unfolded state when released;
the elastic connection unit is connected between the rotating shaft and the base assembly and is elastically connected with the rotating shaft, and the elastic connection unit is configured to elastically drive the rotating shaft to rotate so as to release the projection curtain.
8. The curtain device of claim 1, wherein the shaft is a bi-directional shaft such that the reflective layer or the reflective layer faces the inside of the passenger compartment when the projection curtain is deployed by rotation of the shaft in two directions.
9. The curtain device of claim 1, wherein the spool assembly further comprises a weight bar connected to a bottom end of the projection curtain; the counter weight pole surface interval is equipped with a plurality of sucking discs, is used for fixed the bottom of projection curtain.
10. A vehicle comprising a curtain device as claimed in any one of claims 1 to 9 disposed within a passenger compartment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322096822.1U CN220455661U (en) | 2023-08-04 | 2023-08-04 | Curtain device and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322096822.1U CN220455661U (en) | 2023-08-04 | 2023-08-04 | Curtain device and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220455661U true CN220455661U (en) | 2024-02-06 |
Family
ID=89725729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322096822.1U Active CN220455661U (en) | 2023-08-04 | 2023-08-04 | Curtain device and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220455661U (en) |
-
2023
- 2023-08-04 CN CN202322096822.1U patent/CN220455661U/en active Active
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