Curtain lifting device and vehicle-mounted projection equipment

Abstract

The utility model discloses a curtain lifting device and vehicle-mounted projection equipment, and the curtain lifting device comprises a lifting mechanism with an accommodation space, a supporting plate, and a supporting mechanism and a curtain which are connected between the lifting mechanism and the supporting plate. The lifting mechanism comprises an upper shell, a lower shell, a control unit, a cloth rolling mechanism, a first hinge mechanism, a sensor and a brake, wherein the upper shell and the lower shell are matched and buckled to form the containing space, and the control unit, the cloth rolling mechanism, the first hinge mechanism, the sensor and the brake are located in the containing space. The cloth winding mechanism comprises a winding drum and a driving device fixed in the winding drum; the control unit, the cloth rolling mechanism, the first hinge mechanism and the sensor are fixed to the inner surface of the upper shell, and the brake is fixedly connected to the first hinge mechanism. The curtain lifting device not only can accurately control the stop position of the projection curtain in the vehicle-mounted projection equipment, but also is high in impact resistance and prevents the curtain from shaking.

Description

Technical Field

[0001] This utility model relates to the field of projection screen technology, and in particular to a screen lifting device and a vehicle-mounted projection device. Background Technology

[0002] With the development of automotive technology, in order to meet the high-quality driving experience of vehicle users, vehicle manufacturers are integrating increasingly advanced in-vehicle entertainment systems into vehicles. As a result, projection systems have begun to be used in automotive in-vehicle entertainment systems. By installing projectors in the rear seat area of ​​the vehicle, images are projected onto a specially designed, retractable screen in front of the vehicle, thereby enabling a wider variety of entertainment content such as movies, animations, and games.

[0003] Currently, traditional electric retractable screens are fixedly installed on the roof of vehicles, consisting of upper and lower support mechanisms and a middle support mechanism. When the screen is lowered, the support mechanism only provides support and cannot stop the screen at a user-preset position. Therefore, precise control of the screen's desired position is impossible. Furthermore, the support mechanism usually has built-in elastic connectors to provide shock absorption in the vertical and horizontal directions during use. However, when the vehicle is in motion, especially when traversing uneven roads or large potholes, the screen is easily subjected to strong impacts, and even the support mechanism with elastic connectors cannot suppress the resulting strong vibrations. Therefore, there is an urgent need for a new type of lifting device and vehicle-mounted projection equipment to solve the technical problems of existing screen lifting devices' inability to precisely control the screen's position and their poor impact resistance. Utility Model Content

[0004] To overcome the problems of poor precision control and poor impact resistance of the screen in existing vehicle-mounted screen lifting devices, this utility model proposes a screen lifting device and a vehicle-mounted projection device. The specific technical solution is as follows:

[0005] A curtain lifting device includes a lifting mechanism with a accommodating space, a support plate, a support mechanism connected between the lifting mechanism and the support plate, and a curtain. The lifting mechanism includes an upper shell and a lower shell that are adapted to fasten together to form the accommodating space, and a control unit, a fabric rolling mechanism, a first hinge mechanism, a sensor, and a brake located within the accommodating space. The fabric rolling mechanism includes a roller and a drive device fixed inside the roller. The control unit, the fabric rolling mechanism, the first hinge mechanism, and the sensor are fixed to the inner surface of the upper shell, and the brake is fixedly connected to the first hinge mechanism.

[0006] Preferably, the upper shell includes a rectangular first bottom wall and a long side wall integrally bent vertically along the long sides of the first bottom wall; the lower shell includes a rectangular second bottom wall and a short side wall integrally bent vertically along the short sides of the second bottom wall; the control unit is fixedly disposed on one side of the inner surface of the first bottom wall along the long side, and the first hinge mechanism and sensor are symmetrically fixed on both sides of the control unit; the fabric rolling mechanism is fixedly disposed on the other side; the center of the second bottom wall corresponds to the support mechanism and the curtain passing through the opening.

[0007] Preferably, the first hinge mechanism is located between the sensors, and the distance between the sensors is less than the length of the opening.

[0008] Preferably, the driving device includes a drum motor.

[0009] Preferably, the tray is provided with a second hinge mechanism corresponding to the first hinge mechanism.

[0010] Preferably, one end of the curtain is connected to the roller, and the other end is connected to the support plate.

[0011] Preferably, one end of the support mechanism is connected to the first hinge mechanism, and the other end is connected to the second hinge mechanism.

[0012] Preferably, the support mechanism includes a hollow cylindrical first hinge rod, a second hinge rod, a third hinge mechanism connecting the first hinge rod and the second hinge rod, symmetrically arranged at both ends of the long side of the upper shell, and an elastic connector fixedly disposed within the first hinge rod.

[0013] Preferably, the first hinge mechanism, the second hinge mechanism, and the third hinge mechanism each include a first hinge shaft, a second hinge shaft, and a third hinge shaft; one end of the first hinge rod is connected to the first hinge mechanism on the same side of it via the first hinge shaft, and the other end is connected to the third hinge mechanism via the third hinge shaft; one end of the second hinge rod is connected to the second hinge mechanism on the same side of it via the second hinge shaft, and the other end is connected to the third hinge mechanism via the third hinge shaft.

[0014] A vehicle-mounted projection device includes a projector and the aforementioned screen lifting device.

[0015] Compared with the prior art, this utility model provides a screen lifting device. By detecting the position of the support plate through a sensor set on the inner surface of the upper shell, the device can accurately control the stopping position of the projection screen in the vehicle projection equipment. When the screen reaches the set position, the first hinge mechanism is locked by a brake fixedly connected to the first hinge mechanism, thereby improving the screen's impact resistance caused by vehicle vibration during driving and effectively preventing the screen from shaking during driving. Attached Figure Description

[0016] Figure 1 This is a perspective view of the curtain lifting device of this utility model.

[0017] Figure 2 This is an exploded view of the structure of the curtain lifting device of this utility model.

[0018] Figure 3 This is a front sectional view of the curtain lifting device of this utility model.

[0019] in:

[0020] 1000 - Curtain lifting device;

[0021] 1-Lifting mechanism; 10-Upper shell; 100-First bottom wall; 20-Lower shell; 200-Second bottom wall;

[0022] 101-Control unit; 102-Sensor; 103-Fabric winding mechanism; 104-Brake; 105-Roll;

[0023] 106 - Drive unit;

[0024] 2-Plate;

[0025] 3-Support mechanism; 30-First hinge rod; 31-Second hinge rod; 32-Elastic connector;

[0026] 4-Curtain;

[0027] 5 - First hinge mechanism; 50 - First hinge shaft;

[0028] 6-Second hinge mechanism; 60-Second hinge shaft;

[0029] 7-Third hinge mechanism; 70-Third hinge shaft. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] The structure of the curtain lifting device of this utility model is as follows: Figures 1 to 3As shown, the device includes a lifting mechanism 1 with a accommodating space, a support plate 2, and an elastic support mechanism 3 and a curtain 4 connected between the lifting mechanism 1 and the support plate 2. The lifting mechanism 1 and the support plate 2 are arranged vertically in parallel, and the support mechanism 3 and the curtain 4 are arranged horizontally in parallel. The support mechanism 3 can elastically extend and retract between the lifting mechanism 1 and the support plate 2 and is used to support the position of the curtain 4 between the lifting mechanism 1 and the support plate 2, thereby enabling the curtain 4 to stably expand and contract between the lifting mechanism 1 and the support plate 2. The support mechanism 3 and the curtain 4 can be completely retracted and accommodated within the accommodating space.

[0032] The lifting mechanism 1 includes an upper shell 10 and a lower shell 20 that are adapted to and fastened to form an accommodating space, as well as a control unit 101, a fabric rolling mechanism 103, a first hinge mechanism 5, a sensor 102, and a brake 104 located within the accommodating space. The fabric rolling mechanism 103 includes a roll 105 and a drive device 106 fixed inside the roll. The roll 105 is used to roll up or release the curtain 4. The drive device 106 drives the roll 105 to rotate, thereby realizing the rolling up or releasing of the curtain 4. The control unit 101, the fabric rolling mechanism 103, the first hinge mechanism 5 and the sensor 102 are fixed on the inner surface of the upper shell 10. The brake 104 is fixedly connected to the first hinge mechanism 5. Preferably, the drive device 106 includes a roller motor (not shown) and a reduction mechanism (not shown) that is coaxially connected and fixed with the roller motor. The brake 104 is an electromagnetic brake. The roller motor and the roll 105 are fixed as one piece so that the rotation of the roller motor directly drives the roll 105 to rotate along its axis. The curtain 4 is rolled up or released on the roll 105 as the roll 105 rotates.

[0033] The upper shell 10 includes a rectangular first bottom wall 100 and an integral long side wall (not shown) that is vertically bent along the long sides of both sides of the first bottom wall 100. A control unit 101 is fixedly mounted on one side of the inner surface of the first bottom wall 100 along the long side, and a first hinge mechanism 5 and a sensor 102 are symmetrically fixed on both sides of the control unit 101. A fabric rolling mechanism 103 is fixedly mounted on the other side of the inner surface of the first bottom wall 100 along the long side. In the width direction of the first bottom wall 100, the first hinge mechanism 5 is located between the roll 105 and the brake 104. In the length direction of the first bottom wall 100, the first hinge mechanism 5 is positioned... Between the sensors 102, the center line connecting the first hinge mechanism 5 and the sensor 102 is parallel to the cloth rolling mechanism 103, and the first hinge mechanism 5 is fixedly connected to the brake 104; the lower shell 20 includes a rectangular second bottom wall 200 and a short side wall (not shown) that is vertically bent on both sides of the second bottom wall 200. A narrow opening 201 is provided in the center of the second bottom wall 200 corresponding to the support mechanism 3 and the curtain 4; the distance between the sensors 102 is less than the length of the opening 201, so as to ensure that the sensors 102 are not blocked by the lower shell 20 when detecting the distance of the tray 2, thus affecting the detection effect.

[0034] The support plate 2 is provided with a second hinge mechanism 6 corresponding to the first hinge mechanism 5. One end of the support mechanism 3 is connected to the first hinge mechanism 5 and the other end is connected to the second hinge mechanism 6. One end of the curtain 4 is fixedly connected to the roller 105 and the other end is fixedly connected to the support plate 2. The weight of the support plate 2 ensures that the curtain 4 is in a flat state.

[0035] The support mechanism 3 is symmetrically arranged at both ends of the long side of the upper shell 10, including a hollow cylindrical first hinge rod 30 and a second hinge rod 31, a third hinge mechanism 7 connecting the first hinge rod 30 and the second hinge rod 31, and an elastic connector 32 fixedly installed in the first hinge rod 3. When the roller motor rotates in the winding direction of the screen 4, the screen 4 drives the support plate 2 to rise. When the roller motor rotates in the opposite direction of the winding direction of the screen 4, the support plate 2 descends under the combined action of its own weight and the tension between the first hinge rod 30 and the second hinge rod 31. The elastic connector 32 can maintain a stable tension between the first hinge rod 30 and the second hinge rod 31. This tension can counteract the vibration force on the screen 4 in the vertical and horizontal directions, thereby better realizing the anti-vibration effect of the screen 4 in the vertical and horizontal directions, and thus helping to enhance the overall structural stability of the lifting device 1000. The area of ​​the opening 201 is larger than the vertical projection area of ​​the support mechanism 3, the screen 4, and the sensor 102 to ensure that the support mechanism 3 and the screen 4 can freely extend and retract within the opening 201. The support plate 2 is correspondingly set with the opening 201. The area of ​​the support plate 2 is the same as the area of ​​the opening 201, so that the support mechanism 3 and the curtain 4 can be retracted through the opening 201 and housed in the housing space of the lifting mechanism 1. When the curtain 4 is in the initial state of being fully rolled up, the support plate 2 and the opening 201 are adapted to form a closed housing space through the upper shell 10, the lower shell 20 and the support plate 2, which helps to protect all components in the housing space and ensure the stability of the curtain lifting device 1000.

[0036] The distance between the tray 2 and the lifting mechanism 1 is detected by the sensor 102. When the user gives the instruction to unfold the curtain 4, the control unit 101 outputs a drive signal to the drive device 106 and makes it rotate. At the same time, it outputs an electrical signal to the brake 104, so that the brake 104 is energized and unlocked. The first hinge rod 30 of the support mechanism 3 and its elastic connecting member 32 can move with the roll-up or release of the curtain 4. When the distance of the tray 2 detected by the sensor 102 reaches the user-set position, the sensor 102 feeds back the detection signal to the control unit 101. The control unit 101 outputs a drive signal to stop the drive device 106 and at the same time outputs a power-off signal to make the brake 104 lock the first hinge mechanism 5. This prevents the support mechanism 3 from shaking up and down due to its elastic connecting member 32 during vehicle operation, thereby accurately controlling the distance between the tray 2 and the lifting mechanism 1, so that the curtain 4 can stay at any position between the tray 2 and the lifting mechanism 1 set by the user, and can reduce the shaking of the curtain 4 caused by the tunnel during the journey.

[0037] The first hinge mechanism 5, the second hinge mechanism 6, and the third hinge mechanism 7 each include a first hinge shaft 50, a second hinge shaft 60, and a third hinge shaft 70. One end of the first hinge rod 30 is connected to the first hinge mechanism 5 on the same side via the first hinge shaft 50, and the other end is connected to the third hinge mechanism 7 via the third hinge shaft 70. Thus, the first hinge rod 30 can rotate around the first hinge mechanism 5 and form an angle (not shown) between the first hinge rod 30 and the first bottom wall 100 of the lifting mechanism 1. The second hinge rod 31 can rotate around the third hinge mechanism 7 and form an angle (not shown) between the second hinge rod 31 and the support plate 2. One end of the second hinge rod 31 is connected to the second hinge mechanism 6 on the same side via the second hinge shaft 60, and the other end is connected to the third hinge mechanism 7 via the third hinge shaft 70. Thus, the first hinge rod 30 and the second hinge rod 31 rotate through the third hinge mechanism 7, so that the first hinge rod 30 and the second hinge rod 31 have an included angle α. That is, the included angle α between the first hinge rod 30 and the second hinge rod 31 can be increased or decreased through the third hinge mechanism 7, so that the free ends on both sides of the first hinge rod 30 and the second hinge rod 31 open or close accordingly, thereby realizing the raising and lowering of the position of the curtain 4 by the support mechanism 3.

[0038] The working principle of the curtain lifting device 1000: When the curtain 4 is in the initial position of being fully rolled up, the drive device 106 is not powered on, the support mechanism 3 is pulled and retracted by the curtain 4, and the included angle α between the first hinge rod 30 and the second hinge rod 31 is 0. When the curtain 4 needs to be unfolded and held in the expected position for the vehicle user, firstly, the drive device 106 is powered on and reversed, and the curtain 4 is released. The curtain 4 is kept flat in the half-unfolded or fully-unfolded state by the weight of the support plate 2 and the tension of the elastic connector 32. Then, when the sensor 102 checks that the position of the support plate 2 has reached the preset position, the drive device 106 is powered off and stops rotating, and at the same time, it outputs a power-off signal to the brake 104, so that the brake 104 locks the connection to the first transfer mechanism 5. At this time, the included angle α between the first hinge rod 30 and the second hinge rod 31 can be fixed in the preset state and remain stable. At the same time, this improves the impact resistance of the support mechanism 3. Even during vehicle travel, especially when traveling in a tunnel, the support mechanism 3 will not cause the curtain 4 to shake due to the elastic connector 32. Thus, when the curtain 4 stops in the fully-unfolded or half-unfolded state at any expected position, it can remain stationary and not shake due to the stable tension of the support mechanism 3. When the curtain 4 needs to be retracted, the drive device 106 is powered on and rotates forward. The rotation of the drive device 106 drives the roller 105 to rotate, thereby winding the curtain 4 onto the roller 105. The curtain 4 is wound and retracted. The first hinge rod 30 and the second hinge rod 31 are rotated through the third hinge mechanism 7. At this time, the included angle α becomes smaller and is between 0° and 90°.

[0039] A vehicle-mounted projection device (not shown) includes a projector (not shown) and a screen lifting device 1000. The vehicle-mounted projection device integrated into a vehicle satisfies the high-quality driving experience of vehicle users. By installing a projector in the rear seat area of ​​the vehicle (not shown), images are projected onto a specially designed, liftable screen 4 in front of the vehicle. Precise control of the screen 4's position can be achieved during vehicle movement, especially when the vehicle is traveling through ditches, effectively preventing the screen 4 from shaking due to vehicle vibrations. This satisfies the vehicle users' demand for a wider variety of entertainment content, including movies, animations, and games.

[0040] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "horizontal direction", "vertical direction", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A curtain lifting device, comprising a lifting mechanism with accommodating space, a support plate, and a support mechanism and a curtain connected between the lifting mechanism and the support plate, characterized in that, The lifting mechanism includes an upper shell and a lower shell that are adapted to fasten together to form the accommodating space, and a control unit, a fabric rolling mechanism, a first hinge mechanism, a sensor, and a brake located within the accommodating space; the fabric rolling mechanism includes a roll and a drive device fixed inside the roll; the control unit, the roll, the first hinge mechanism, and the sensor are fixed to the inner surface of the upper shell; the brake is fixedly connected to the first hinge mechanism.

2. The curtain lifting device according to claim 1, characterized in that, The upper shell includes a rectangular first bottom wall and an integral long side wall that is vertically bent along the long sides of the first bottom wall. The lower shell includes a rectangular second bottom wall and an integral short side wall that is vertically bent along the short sides of the second bottom wall. The control unit is fixedly disposed on one side of the inner surface of the first bottom wall along the long side, and the first hinge mechanism and sensor are symmetrically fixed on both sides of the control unit. The fabric rolling mechanism is fixedly disposed on the other side. The center of the second bottom wall has an opening corresponding to the support mechanism and the curtain.

3. The curtain lifting device according to claim 2, characterized in that, The first hinge mechanism is located between the sensors, and the distance between the sensors is less than the length of the opening.

4. The curtain lifting device according to claim 2, characterized in that, The drive device includes a drum motor.

5. The curtain lifting device according to claim 3, characterized in that, The pallet is provided with a second hinge mechanism corresponding to the first hinge mechanism.

6. The curtain lifting device according to claim 5, characterized in that, One end of the curtain is connected to the roller, and the other end is connected to the support plate.

7. The curtain lifting device according to claim 5, characterized in that, One end of the support mechanism is connected to the first hinge mechanism, and the other end is connected to the second hinge mechanism.

8. The curtain lifting device according to claim 7, characterized in that, The support mechanism includes a hollow cylindrical first hinge rod, a second hinge rod, a third hinge mechanism connecting the first hinge rod and the second hinge rod, symmetrically arranged at both ends of the long side of the upper shell, and an elastic connector fixedly disposed within the first hinge rod.

9. The curtain lifting device according to claim 8, characterized in that, The first hinge mechanism, the second hinge mechanism, and the third hinge mechanism each include a first hinge shaft, a second hinge shaft, and a third hinge shaft; one end of the first hinge rod is connected to the first hinge mechanism on the same side of it via the first hinge shaft, and the other end is connected to the third hinge mechanism via the third hinge shaft; one end of the second hinge rod is connected to the second hinge mechanism on the same side of it via the second hinge shaft, and the other end is connected to the third hinge mechanism via the third hinge shaft.

10. A vehicle-mounted projection device, comprising a projector, characterized in that, It also includes the curtain lifting device according to any one of claims 1 to 9.

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