Telescopic support, projection curtain and vehicle

Abstract

The utility model relates to the technical field of projection, and provides a telescopic support which comprises a guide rail, a cover plate assembly, a shear shank and a driving device, the cover plate assembly and the guide rail are oppositely arranged, the shear shank comprises a first arm rod, a second arm rod, a third arm rod and a fourth arm rod, and one end of the first arm rod is rotationally connected with the guide rail and can slide relative to the guide rail; one end of the second arm rod is rotationally connected with the cover plate assembly and can slide relative to the cover plate assembly, and the other end of the second arm rod is rotationally connected with the guide rail; the third arm rod is rotationally connected with the first arm rod; the fourth arm rod is rotationally connected with the second arm rod; the driving device is connected with the third arm rod and used for driving the third arm rod to rotate. The third arm rod and the fourth arm rod respectively form a scissor fork structure with the first arm rod and the second arm rod, and the mechanism is good in stability, high in rigidity, stable in operation in the closing and unfolding process, capable of being driven by only one driving device, and low in cost. In addition, the embodiment of the utility model further provides a projection curtain and a vehicle.

Description

Technical Field

[0001] This application relates to the field of projection technology, specifically to a telescopic bracket, a projection screen, and a vehicle. Background Technology

[0002] Currently, projection technology is being used more and more widely, and its application scenarios are increasing. For example, some cars are now equipped with retractable projection devices, making it convenient for users to watch inside the car.

[0003] Current vehicle-mounted projection equipment typically uses a double scissor lift structure. These double scissor lift structures usually employ independent components, requiring at least two motors for drive. This results in a complex structure, poor synchronization during other control processes, and a tendency for imbalances during the extension and retraction process. Furthermore, the high cost hinders widespread application. Utility Model Content

[0004] This application provides a telescopic bracket, a projection screen, and a vehicle to at least partially improve the above-mentioned technical problems.

[0005] The embodiments of this application are implemented through the following technical solutions.

[0006] This application provides a telescopic support, including a guide rail, a cover plate assembly, a scissor frame, and a driving device. The cover plate assembly is disposed opposite to the guide rail. The scissor frame includes a first arm, a second arm, a third arm, and a fourth arm. One end of the first arm is rotatably connected to the guide rail and can slide relative to the guide rail, while the other end is rotatably connected to the cover plate assembly. One end of the second arm is rotatably connected to the cover plate assembly and can slide relative to the cover plate assembly, while the other end is rotatably connected to the guide rail. One end of the third arm is rotatably connected to the middle part of the first arm. One end of the fourth arm is rotatably connected to the middle part of the second arm, while the other end is rotatably connected to the cover plate assembly. The driving device is connected to the third arm and is used to drive the third arm to rotate.

[0007] In some embodiments, one end of the cover plate assembly is provided with a first support, and the end of the first arm away from the guide rail is rotatably connected to the first support.

[0008] In some embodiments, a second support is provided at the other end of the cover plate assembly, and the end of the fourth arm away from the second arm is rotatably connected to the second support.

[0009] In some embodiments, the cover plate assembly is provided with a slide rail, the extension direction of which is the same as the extension direction of the guide rail, and the end of the second arm away from the first arm is rotatably connected to the middle of the cover plate assembly and is slidable relative to the cover plate assembly.

[0010] In some embodiments, the scissor arm further includes a third support, on which the end of the second arm remote from the cover plate assembly is rotatably mounted.

[0011] In some embodiments, the drive device is used to drive the third arm to rotate on a fixed axis.

[0012] In some embodiments, the axis of rotation of the third arm driven by the drive device is coplanar with the straight line containing the guide rail.

[0013] In some embodiments, when the scissor lift is in a folded state, the cover assembly shields the guide rail and the drive unit.

[0014] Secondly, embodiments of this application also provide a projection screen, including the aforementioned telescopic bracket and screen, wherein both ends of the screen are connected to the guide rail and the cover plate assembly to unfold when the scissor bracket is extended.

[0015] Secondly, embodiments of this application also provide a vehicle, including the aforementioned projection screen and projection device.

[0016] The telescopic bracket, projection screen, and vehicle provided in this application embodiment have a first arm and a second arm arranged symmetrically. The third arm and the fourth arm form a scissor fork structure with the first arm and the second arm, respectively. Due to the rotationally symmetrical double scissor fork structure design, the mechanism has the advantages of good stability, high rigidity, and smooth operation during the closing and unfolding process. The entire transmission mechanism only needs one drive device to drive it, which has the characteristics of low cost. At the same time, the mechanism has the characteristics of novel appearance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a wearable device provided in an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of the optical path for imaging in a wearable device provided in an embodiment of this application.

[0020] Figure 3 This is a schematic diagram of the structure of a driving device in a wearable device provided in an embodiment of this application. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] Currently, projection technology is being used more and more widely, and its application scenarios are increasing. For example, some cars are now equipped with retractable projection devices, making it convenient for users to watch inside the car.

[0023] Current vehicle-mounted projection equipment typically uses a double scissor lift structure. These double scissor lift structures usually employ independent components, requiring at least two motors for drive. This results in a complex structure, poor synchronization during other control processes, and a tendency for imbalances during the extension and retraction process. Furthermore, the high cost hinders widespread application.

[0024] Please refer to the following: Figure 1 and Figure 2 This embodiment provides a telescopic bracket 30, which can be applied to a vehicle-mounted projection screen 10 or other projection screens 10. In this embodiment, a projection screen 10 suitable for installation in a vehicle will be described.

[0025] In this embodiment, the telescopic bracket 30 includes a guide rail 31, a cover plate assembly 32, a scissor frame 37, and a drive device 36. The cover plate assembly 32 is disposed opposite to the guide rail 31, and the scissor frame 37 is disposed between the guide rail 31 and the cover plate assembly 32.

[0026] Specifically, the guide rail 31 can be configured as a generally linear guide rail 31, so that the scissor bracket 37 extends and retracts in a straight line during movement, and also facilitates the installation of the guide rail 31 inside the vehicle. For example, in a more specific application scenario, the guide rail 31 is suitable for installation on the ceiling inside the vehicle, and the guide rail 31 can be configured to fit the ceiling of the vehicle. In one embodiment, the ceiling of the vehicle can be provided with a recess, and the guide rail 31 can be embedded in the recess to avoid occupying interior space.

[0027] The cover assembly 32 is disposed opposite to the guide rail 31. In this embodiment, the cover assembly 32 can be located below the guide rail 31. The cover assembly 32 can move relative to the guide rail 31 under the action of the scissor bracket 37, and during the movement, it can move closer to or away from the guide rail 31. When the cover assembly 32 is close to the guide rail 31, it can cover the scissor bracket 37 and the guide rail 31, making the interior appearance of the vehicle more regular. For example, in one embodiment, the ceiling of the vehicle interior can be provided with a groove, and the guide rail 31 can be embedded in the groove. When the cover assembly 32 is close to the guide rail 31 and reaches the minimum distance between the two, the scissor bracket 37 can retract into the groove, and the cover assembly 32 can close the groove, thereby covering the scissor bracket 37 and the guide rail 31, making the overall appearance more regular. Furthermore, when the cover assembly 32 is close to the guide rail 31 and reaches the minimum distance between the two, the surface of the cover assembly 32 can also be flush with the ceiling of the vehicle interior, which can further improve the regularity of the interior.

[0028] The cover plate assembly 32 can be a roughly plate-shaped structure, and in this embodiment, in order to better shield the guide rail 31 and the scissor bracket 37, the length of the cover plate assembly 32 can be slightly greater than the length of the guide rail 31.

[0029] The scissor lift 37 includes a first arm 371, a second arm 372, a third arm 373, and a fourth arm 374. The length of the first arm 371 is approximately equal to the length of the second arm 372. The first arm 371 can be approximately a straight rod structure. One end of the first arm 371 is rotatably connected to a guide rail 31 and can slide relative to the guide rail 31. The other end is rotatably connected to a cover plate assembly 32. In this embodiment, a hinge pin is provided in the middle of the first arm 371 for rotatable connection with the third arm 373.

[0030] Specifically, one end of the cover plate assembly 32 is provided with a first support 33, and a hinge pin is provided on the first support 33. The end of the first arm 371 away from the guide rail 31 is rotatably connected to the first support 33 through the hinge pin. In some other embodiments, the first arm 371 may also be rotatably connected to the cover plate assembly 32 in other ways, such as through a pivot, hinge, etc.

[0031] The second arm 372 can be generally a straight rod structure. One end of the second arm 372 is rotatably connected to the cover plate assembly 32 and can slide relative to the cover plate assembly 32. Specifically, in this embodiment, the cover plate assembly 32 is provided with a slide rail, the extension direction of which is the same as the extension direction of the guide rail 31. The end of the second arm 372 away from the first arm 371 is rotatably connected to the middle of the cover plate assembly 32 and can slide relative to the cover plate assembly 32. In some other embodiments, the end of the second arm 372 away from the guide rail 31 may also be provided with a slide rail, and the cover plate assembly 32 may slide relative to the second arm 372. This embodiment does not limit this.

[0032] The other end of the second arm 372 is rotatably connected to the guide rail 31. Specifically, the scissor arm 37 also includes a third support 35, which can be installed on the ceiling inside the vehicle along with the guide rail 31, or in some embodiments, the third support 35 can be directly installed on the guide rail 31. The end of the second arm 372 away from the cover plate assembly 32 is rotatably mounted on the third support 35. In other embodiments, the end of the second arm 372 away from the cover plate assembly 32 can also be directly rotatably mounted on the guide rail 31. Furthermore, in other embodiments, the second arm 372 can also be rotatably connected to the ceiling inside the vehicle in other ways, such as through a pivot, hinge, etc. In this embodiment, a hinge pin is also provided in the middle of the second arm 372 for rotatably connecting with the fourth arm 374. The first arm 371 and the second arm 372 are roughly parallel to each other, so that the guide rail 31, the cover plate assembly 32, the first arm 371 and the second arm 372 form a parallelogram structure. This structure has strong stability and the first arm 371 and the second arm 372 can maintain synchronous movement.

[0033] One end of the third arm 373 is rotatably connected to the middle of the first arm 371. Specifically, one end of the third arm 373 is rotatably connected to the hinge pin on the first arm 371, and the other end is used for transmission connection with the drive device 36 so that it can move under the drive of the drive device 36. When the third arm 373 moves, it will drive the first arm 371 to move, which in turn drives the parallelogram structure formed between the first arm 371 and the second arm 372 to move, realizing the extension and retraction of the scissor frame 37. At this time, the first arm 371, the third arm 373 and the guide rail 31 are equivalent to forming a triangular structure. Since the triangle has good stability, the support stability between the cover plate assembly 32 and the guide rail 31 is very good when the scissor frame 37 is in the extended state. The screen 20 can remain taut and not easily shake, which is beneficial for users to view the content projected on the screen 20.

[0034] One end of the fourth arm 374 is rotatably connected to the middle of the second arm 372. Specifically, one end of the fourth arm 374 is rotatably connected to the hinge pin on the second arm 372, and the other end is rotatably connected to the cover plate assembly 32. Specifically, in this embodiment, the end of the cover plate assembly 32 away from the first support 33 is provided with a second support 34, and a hinge pin is provided on the second support 34. The end of the fourth arm 374 away from the second arm 372 is rotatably connected to the second support 34 through the hinge pin. At this time, the second arm 372, the fourth arm 374, and the cover plate assembly 32 are equivalent to forming a triangular structure. Since the triangle has good stability, when the scissor frame 37 is in the unfolded state, the support stability between the cover plate assembly 32 and the guide rail 31 is very good, and the screen 20 can remain taut and not easily shake, which is beneficial for users to view the content projected on the screen 20.

[0035] The rotation axes of the first arm 371, the second arm 372, the third arm 373, and the fourth arm 374 are all parallel to each other, and the first arm 371, the second arm 372, the third arm 373, and the fourth arm 374 are all approximately located in the same plane. The rotation axes of the first arm 371, the second arm 372, the third arm 373, and the fourth arm 374 are all approximately perpendicular to the coplanar plane of the first arm 371, the second arm 372, the third arm 373, and the fourth arm 374.

[0036] The drive device 36 is connected to the third arm 373 and is used to drive the third arm 373 to rotate. When the drive device 36 drives the third arm 373 to rotate, the third arm 373 drives the first arm 371, the second arm 372, and the fourth arm 374 to rotate, realizing the extension and retraction process of the scissor frame 37. Specifically, in this embodiment, the output shaft of the drive device 36 is connected to the end of the third arm 373 away from the first arm 371. When the output shaft of the drive device 36 rotates, it drives the third arm 373 to rotate. Since the position of the output shaft remains unchanged, when the drive device 36 drives the third arm 373 to rotate, it is a fixed-axis rotation, that is, the third arm 373 rotates around the end of the third arm 373 away from the first arm 371. The axis of rotation of the third arm 373 can be parallel to the axis of the output shaft of the drive device 36. In particular, the axis of rotation of the third arm 373 can be coaxial with the axis of the output shaft of the drive device 36. The advantage of this setup is that the entire transmission mechanism only requires one drive unit 36 ​​to operate, which is cost-effective.

[0037] In a more specific embodiment, the rotation axis of the third arm 373 driven by the drive device 36 can be coplanar with the line containing the guide rail 31. With this arrangement, when the scissor frame 37 retracts, the third arm 373 can rotate to a state approximately parallel or nearly parallel to the guide rail 31. At this time, the first arm 371, the second arm 372, and the fourth arm 374 can also rotate to a state approximately parallel or nearly parallel to the guide rail 31. Thus, in the retracted state, the telescopic bracket 30 occupies less space. In other embodiments, the rotation axis of the third arm 373 can also be in other positions; this embodiment does not limit this.

[0038] In this embodiment, the driving device 36 is a motor, and the output shaft of the motor is fastened to the third arm 373 to drive the third arm 373 to rotate. To more precisely control the rotation angle of the third arm 373, a self-locking device is also provided within the driving device 36. When the rotation angle of the third arm 373 reaches a predetermined angle, the self-locking device can lock the output shaft of the driving device 36, thereby preventing excessive rotation of the third arm 373. Simultaneously, the self-locking device can limit the output shaft of the driving device 36 during use, ensuring that the screen 20 remains taut and provides a better projection effect. The self-locking device can be, for example, a gear mechanism. In other embodiments, the self-locking device can also be a ratchet mechanism, etc., but this embodiment does not limit it to this type.

[0039] The working principle of the telescopic bracket 30 provided in this embodiment is as follows:

[0040] When the telescopic bracket 30 needs to be deployed, the control drive device 36 is activated, driving the third arm 373 to rotate around the axis of the output shaft of the drive device 36. When the third arm 373 rotates, it drives the first arm 371 to slide and rotate relative to the guide rail 31. At this time, the cover plate assembly 32 gradually moves away from the guide rail 31, driving the second arm 372 to slide and rotate relative to the cover plate assembly 32. At the same time, the fourth arm 374 rotates relative to the second arm 372. When the cover plate assembly 32 moves to the designated position, the drive device 36 stops. The third arm 373, the first arm 371 and the guide rail 31 form a triangular structure, and the fourth arm 374, the second arm 372 and the cover plate assembly 32 form a triangular structure, which can stably support the cover plate assembly 32, thereby tensioning the curtain 20.

[0041] When the telescopic bracket 30 needs to be retracted, the control drive device 36 is activated, driving the third arm 373 to rotate around the axis of the output shaft of the drive device 36. When the third arm 373 rotates, it drives the first arm 371 to slide and rotate relative to the guide rail 31. At this time, the cover plate assembly 32 gradually approaches the guide rail 31, driving the second arm 372 to slide and rotate relative to the cover plate assembly 32. At the same time, the fourth arm 374 rotates relative to the second arm 372. When the cover plate assembly 32 moves to the designated position, the drive device 36 stops.

[0042] When the telescopic bracket 30 is in the retracted state, that is, when the scissor bracket 37 is in the folded state, in order to improve the overall appearance consistency and aesthetics of the telescopic bracket 30, the cover plate assembly 32 can be configured to cover the guide rail 31 and the drive device 36. For example, the cover plate assembly 32 can be configured to have an outer diameter larger than the drive device 36 and the guide rail 31, completely covering the guide rail 31 and the drive device 36. This implementation can also completely cover the curtain 20, improving the appearance consistency of the ceiling inside the vehicle.

[0043] This embodiment also provides a vehicle (not shown) with a projection screen 10 installed inside, such as... Figure 3 As shown, the projection screen 10 includes the telescopic bracket 30 and the screen 20 described above. One end of the screen 20 can be fixed to the cover plate assembly 32 and can be unfolded or retracted with the cover plate assembly 32. In one embodiment, the other end of the screen 20 can be directly fixed to the ceiling inside the vehicle. In another embodiment, the other end of the screen 20 can also be fixed to the guide rail 31. This embodiment does not limit this.

[0044] Of course, it is understood that in some other embodiments, the projection screen 10 may also be installed in other locations inside the vehicle, such as the vehicle door, A-pillar, B-pillar, C-pillar or D-pillar, etc. This embodiment does not limit this.

[0045] The telescopic bracket 30, projection screen 10, and vehicle provided in this embodiment have a first arm 371 and a second arm 372 arranged symmetrically. The third arm 373 and the fourth arm 374 form a scissor fork structure with the first arm 371 and the second arm 372, respectively. Due to the rotationally symmetrical double scissor fork structure design, the mechanism has the advantages of good stability, high rigidity, and smooth operation during the closing and unfolding process. The entire transmission mechanism only needs one drive device 36 to drive it, which has the characteristics of low cost. At the same time, the mechanism has the characteristics of novel appearance.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A telescopic support, characterized in that, include: guide; A cover plate assembly, wherein the cover plate assembly is disposed opposite to the guide rail; A scissor lift includes a first arm, a second arm, a third arm, and a fourth arm. One end of the first arm is rotatably connected to the guide rail and can slide relative to the guide rail, while the other end is rotatably connected to the cover plate assembly. One end of the second arm is rotatably connected to the cover plate assembly and can slide relative to the cover plate assembly, while the other end is rotatably connected to the guide rail. One end of the third arm is rotatably connected to the middle part of the first arm, and one end of the fourth arm is rotatably connected to the middle part of the second arm, while the other end is rotatably connected to the cover plate assembly. as well as A drive device; the drive device is connected to the third arm and is used to drive the third arm to rotate.

2. The telescoping support of claim 1, wherein, One end of the cover plate assembly is provided with a first support, and the end of the first arm away from the guide rail is rotatably connected to the first support.

3. A telescopic prop according to claim 2, characterised in that The other end of the cover plate assembly is provided with a second support, and the end of the fourth arm away from the second arm is rotatably connected to the second support.

4. The telescoping support of claim 1, wherein, The cover plate assembly is provided with a slide rail, the extension direction of which is the same as the extension direction of the guide rail. The end of the second arm away from the first arm is rotatably connected to the middle of the cover plate assembly and can slide relative to the cover plate assembly.

5. The telescoping support of claim 1, wherein, A third support is provided at one end of the guide rail, and the end of the second arm away from the cover plate assembly is rotatably mounted on the third support.

6. A telescopic prop according to any one of claims 1 to 5, wherein The drive device is used to drive the third arm to rotate on a fixed axis.

7. A telescoping support according to claim 6, wherein, The axis of rotation of the third arm driven by the driving device is coplanar with the straight line containing the guide rail.

8. A telescopic prop according to any one of claims 1 to 5, wherein When the scissor holder is in the folded state, the cover plate assembly covers the guide rail and the drive device.

9. A projection screen, characterized by Includes the telescopic bracket and curtain as described in any one of claims 1-8, wherein both ends of the curtain are connected to the guide rail and the cover plate assembly to unfold when the scissor bracket is extended.

10. A vehicle characterized by comprising: Includes the projection screen and projection device as described in claim 9.

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