A projection device and system for forward and backward projection inside a vehicle.

Abstract

This invention belongs to the field of in-vehicle projection, and specifically relates to a forward and rearward projection device and system for in-vehicle projection. Taking the front of the vehicle as the front, it includes a forward projection system with a projector positioned on the interior roof surface and a camera facing forward. A first screen is arranged on the projection light path of the projector. It also includes a rearward projection system with a reflector positioned between the projector and the first screen. A flipping drive component generates a flipping action, and a detection component collects the flipping angle information. The reflector flips until its mirror surface is inserted into the projection light path, forming a reflected light path. A second screen is arranged on the reflected light path and positioned at the rear of the vehicle, with no obstruction between the rear of the vehicle and the second screen. It also includes a lifting mechanism, through which the second screen and the first screen are rolled up or unfolded. By protecting the forward and rearward projection systems, it satisfies the requirement that people can choose to watch the projection from either the rear seat inside the vehicle or from outside the vehicle in the countryside.

Description

Technical Field

[0001] This invention belongs to the field of in-vehicle projection, and specifically relates to a forward and backward projection device and system for in-vehicle projection. Background Technology

[0002] As suburban camping becomes increasingly popular, vehicles need to expand their entertainment functions beyond providing regular transportation to meet people's leisure and recreational needs.

[0003] Among them, in-car projectors, which are currently very popular, are widely loved because they allow people to watch videos while camping. Current in-car projectors typically involve mounting a projector on the interior ceiling near the second-row seats, with a screen placed in front for forward projection. Therefore, viewers are limited to those in the back seats, making it quite restrictive. (Reference) Figure 1 , Figure 1 The diagram illustrates a prior art in-vehicle rear-projection method. It is clear from the diagram that if a rear-projection is to be performed, a second screen needs to be added at the rear of the vehicle. Then, a gimbal rotation mechanism needs to be added between the second screen and the projector to project the image onto the rear of the vehicle. When projecting onto the rear of the vehicle, the projection needs to be rotated to project the image onto the rear. This requires a complex rotating mechanical structure and a torsional resistance design for the connection mechanism between the projector and the vehicle. Otherwise, it would be difficult to meet the requirements. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes a forward and backward projection device for in-vehicle use. Taking the front of the vehicle as the forward direction, the device includes a forward projection system. The forward projection system includes a projector and a first screen. The projector is positioned on the interior roof surface with the camera facing forward. The first screen is arranged on the projection optical path l1 of the projector for performing forward projection operations within the vehicle.

[0005] It also includes a rear projection system, which includes a projector, a detection element, a second screen, a reflector, and a flip drive assembly. The reflector is arranged between the projector and the first screen. The flip drive assembly generates a flipping action, and the detection element collects the flipping angle information. The reflector flips until the mirror surface is inserted into the projection light path l1 to form a reflected light path l2. The second screen is arranged on the reflected light path l2. The second screen is arranged at the rear of the vehicle, and there is no obstruction between the rear of the vehicle and the second screen. It is used to perform rear projection operations inside the vehicle.

[0006] It also includes a set of lifting mechanisms, which are arranged in correspondence with the second curtain and the first curtain, and the second curtain and the first curtain are rolled up or unfolded by the corresponding lifting mechanisms.

[0007] Preferably, the tilting drive assembly includes a base, which is mounted on the interior roof surface;

[0008] The base is in the shape of an inverted U-shape, and a set of mounting holes are provided on the inner wall of the concave notch. A set of rotating shafts are extended along both sides of the reflector. The rotating shafts are inserted into the mounting holes, and the power unit rotates around the rotating shafts and their axis to perform a flipping action with a flipping angle of 0° to 90°.

[0009] The detection component is an angle sensor, and the contact end of the angle sensor is engaged with the rotating shaft.

[0010] Preferably, the power unit includes a stepper motor and a geared motor, both mounted on the base, which cooperate to provide stable power to the rotating shaft;

[0011] The stepper motor output shaft passes through the base and is connected to the rotating shaft; and the geared motor cooperates with the rotating shaft.

[0012] Preferably, the mirror surface faces the base and is embedded into the concave notch of the base;

[0013] The reflector is an optical plane reflector, and the mirror surface is made of glass or acrylic with a reflective coating.

[0014] Preferably, each of the lifting mechanisms includes a base fixed to the interior roof surface. The upper part of the base conforms to the shape of the interior roof surface, and the lower part forms a guide rail extending downwards along the vehicle body.

[0015] The base is provided with a lifting drive component, and the lifting drive component drives the guide rail and the corresponding curtain to form a guide rail cooperation along the length direction.

[0016] Preferably, the lifting mechanism is a tire lifting mechanism;

[0017] The base is a tire base. A set of winding tracks are formed on both sides of the tire base. Guide grooves are opened on the surfaces of the set of winding tracks. Several passive wheels and at least one driving wheel are arranged at the inflection point of the guide grooves. The belt passes around the passive wheels and the driving wheel in sequence. The two ends of the corresponding curtain are respectively bonded to the belt.

[0018] It also includes a tension pulley, which is interspersed between the drive pulley and the driven pulley and engages with the belt;

[0019] The lifting drive component is a focusing motor, and the output shaft of the focusing motor is connected to the axle of the power wheel.

[0020] Preferably, the lifting mechanism is a rack and pinion winding lifting mechanism;

[0021] The base is a rack base, the lifting drive is a winding motor, and a winding shaft is inserted into the rack base. One end of the winding shaft passes through the rack base and is connected to the winding motor.

[0022] A set of rack tracks extends downwards from both sides of the rack base, and rack grooves are formed on the adjacent surfaces of the set of rack tracks. The rack grooves and the racks on the corresponding sides of the curtain are slidably arranged relative to each other along the length direction.

[0023] Preferably, the second screen is made of a rear projection front display screen material.

[0024] Preferably, screw holes are pre-drilled on the interior roof surface, and fixing bolts pass through the through holes on the base and are connected to the screw holes.

[0025] This application also claims a projection system that utilizes the above-described projection device, comprising:

[0026] The recognition system is used to identify whether the user selects forward projection or backward projection.

[0027] If forward projection is selected, the main control system will start the forward projection system, and the projector and the first screen will open together to perform forward projection operations inside the vehicle.

[0028] If rearward projection is selected, the rearward projection system is started, the projector and the first screen are turned on, the flip drive component controls the reflector to flip, the detection device collects the flip angle information of the projector, when the flip angle reaches the preset angle, the main control system controls the flip drive component to turn off and performs phase locking, so that the projector, reflector and the second screen work together to perform the in-vehicle rearward projection operation.

[0029] Beneficial effects

[0030] This application claims protection for a forward-facing and backward-facing projection device and system within a vehicle. By protecting two systems, a forward-facing projection system and a backward-facing projection system, it satisfies the diverse viewing needs of people in the countryside, allowing them to enjoy the projection either from the back seat of the vehicle or from outside. Moreover, the two systems are not two independent entities but share a projector and complement each other. Therefore, it eliminates the need for complex rotating mechanisms found in existing technologies. By using a reflector and a flip-drive assembly, the backward-facing projection effect can be achieved, resulting in a simpler structure and significantly more stable operation.

[0031] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A schematic diagram of a rearward projection inside a vehicle, based on existing technology, is shown;

[0034] Figure 2 A schematic diagram of the projection device in an embodiment of the present invention is shown;

[0035] Figure 3 A front view of the flip drive unit in an embodiment of the present invention is shown;

[0036] Figure 4 A side view of the flip drive unit in an embodiment of the present invention is shown;

[0037] Figure 5 A schematic diagram of the tire lifting mechanism in an embodiment of the present invention is shown;

[0038] Figure 6 This diagram illustrates the connection between the first curtain and the wheeled lifting mechanism in an embodiment of the present invention.

[0039] Figure 7 A schematic diagram of the second curtain and wheel belt lifting mechanism in an embodiment of the present invention is shown;

[0040] Figure 8 This illustration shows the connection between the belt and the second curtain in an embodiment of the present invention;

[0041] Figure 9 A schematic diagram of the rack winding lifting mechanism in an embodiment of the present invention is shown;

[0042] Figure 10 A schematic diagram showing the connection between the second curtain and the rack and pinion winding lifting mechanism in an embodiment of the present invention is shown;

[0043] Figure 11 A schematic diagram of the projection system in an embodiment of the present invention is shown.

[0044] In the picture,

[0045] A. Projector; 12. First screen;

[0046] 21. Inspection component; 22. Second curtain; 23. Reflector;

[0047] 24. Tilting drive unit; 240. Base; 241. Rotating shaft;

[0048] 2420. Stepper motor; 2421. Geared motor;

[0049] N211a, tire base; N212a, winding track; N213a, guide groove; N214a, driven wheel; N215a, driving wheel; N216a, belt; N217a, tension wheel;

[0050] N211b, rack base; N212b, rack track; N213b, rack; N214b, rack groove; N215b, reel. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] refer to Figure 2 , Figure 2 A schematic diagram of a projection device in an embodiment of the present invention is shown. It can be clearly seen from the schematic diagram that this application claims a projection device for forward and backward projection inside a vehicle. With the front of the vehicle as the front, it includes a forward projection system. The forward projection system includes a projector A and a first screen 12. The projector A is arranged on the interior surface of the roof of the vehicle and the camera faces forward. The first screen 12 is arranged on the projection light path l1 of the projector A for performing forward projection operations inside the vehicle.

[0053] It also includes a rear projection system, which includes a projector A, a detection element 21, a second screen 22, a reflector 23, and a flip drive assembly 24. The reflector 23 is arranged between the projector A and the first screen 12. The flip drive assembly 24 generates a flipping action, and the detection element 21 collects the flipping angle information. The reflector 23 flips so that the mirror surface is inserted into the projection light path l1 to form a reflected light path l2. The second screen 22 is arranged on the reflected light path l2. The second screen 22 is arranged at the rear of the vehicle, and there is no obstruction between the rear of the vehicle and the second screen 22. It is used to perform rear projection operations inside the vehicle.

[0054] It also includes a set of lifting mechanisms, which are arranged correspondingly to the second screen 22 and the first screen 12, and the second screen 22 and the first screen 12 are rolled up or unfolded through the corresponding lifting mechanisms. The second screen 22 is made of rear projection front display screen material.

[0055] This application claims protection for a forward-facing and backward-facing projection device and system within a vehicle. By protecting two systems, a forward-facing projection system and a backward-facing projection system, it satisfies the diverse viewing needs of people in the countryside, allowing them to enjoy the projection either from the rear seat inside the vehicle or from outside. Moreover, the two systems are not two independent entities but share the same projector A, complementing each other. Therefore, it eliminates the need for complex rotating mechanisms found in existing technologies. The backward-facing projection effect can be achieved through the cooperation of the reflector 23 and the flip drive assembly 24. This not only simplifies the structure and reduces costs but also reduces wiring harness twisting and wear, resulting in significantly more stable operation.

[0056] refer to Figure 3 and Figure 4 , Figure 3 A front view of the flip drive unit in an embodiment of the present invention is shown; Figure 3 As can be clearly seen, the tilt drive assembly 24 includes a base 240, which is installed on the interior roof surface;

[0057] Figure 4 A side view of the flip drive unit in an embodiment of the present invention is shown; it can be clearly seen in the schematic diagram that the flip drive assembly 24 includes a base 240, with screw holes reserved on the interior roof surface, and fixing bolts passing through the through holes on the base 240 and connected to the screw holes;

[0058] The base 240 is in the shape of an inverted U-shape, and a set of mounting holes are provided on the inner wall of the concave notch. A set of rotating shafts 241 are extended along both sides of the reflector 23. The rotating shafts 241 are inserted into the mounting holes. The power unit rotates around the rotating shafts 241 around its axis to perform a flipping action with a flipping angle of 0° to 90°.

[0059] The detection element 21 is an angle sensor, and the contact end of the angle sensor is engaged with the rotating shaft 241.

[0060] The power unit includes a stepper motor 2420 and a geared motor 2421, both of which are mounted on the base 240 and work together to provide stable power to the rotating shaft 241.

[0061] The output shaft of the stepper motor 2420 passes through the base 240 and is connected to the rotating shaft 241; and the geared motor 2421 cooperates with the rotating shaft 241.

[0062] Furthermore, the mirror surface of the reflector 23 faces the base 240 and is embedded in the concave notch of the base 240. In this way, when it is not necessary to project backward, the mirror surface of the reflector 23 can be stored in the concave notch of the base 240, avoiding scratches and impacts during vehicle operation and causing unnecessary damage. In practice, some anti-collision and anti-wear protective pads can also be placed in the concave notch of the base 240, which will not be elaborated here.

[0063] From a practical point of view, the reflector 23 can be selected according to the size of the vehicle, and the preferred size in this application is 200mm*100mm.

[0064] The reflector 23 is an optical plane reflector, and the mirror surface is made of glass or acrylic with a reflective coating.

[0065] Each lifting mechanism includes a base fixed to the interior roof surface. The upper part of the base conforms to the shape of the interior roof surface, and the lower part extends downwards along the vehicle body to form a guide rail.

[0066] The base is equipped with lifting drive components, and the lifting drive components drive the guide rails and the corresponding curtains form a guide rail cooperation along the length direction.

[0067] Furthermore, depending on the actual needs of the personnel, the lifting drive component can be selected from most of the winding devices available on the market. This application provides two embodiments.

[0068] In Example 1, the lifting mechanism is a tire lifting mechanism, wherein,

[0069] refer to Figure 5 ,refer to Figure 6 and Figure 7 and Figure 8 , Figure 5 A schematic diagram of the tire lifting mechanism in an embodiment of the present invention is shown; Figure 6 This diagram illustrates the connection between the first curtain and the wheeled lifting mechanism in an embodiment of the present invention. Figure 7 A schematic diagram of the second curtain and wheel belt lifting mechanism in an embodiment of the present invention is shown; Figure 8 This illustration shows the connection between the belt and the second curtain in an embodiment of the present invention.

[0070] Figure 5 , Figure 6 neutralization Figure 7 It can be clearly seen that the base is a tire base N211a. A set of winding tracks N212a are formed on both sides of the tire base N211a. A guide groove N213a is opened on the adjacent surface of the set of winding tracks. Several passive wheels N214a and at least one driving wheel N215a are arranged at the inflection point of the guide groove N213a. The belt N216a passes around the passive wheels N214a and the driving wheel N215a in an S-shape. The two ends of the corresponding curtain are respectively bonded to the belt N216a.

[0071] It also includes tension pulley N217a, which is interspersed between drive pulley N215a and driven pulley N214a, and engages with belt N216a.

[0072] The lifting drive component is a focusing motor, and the output shaft of the focusing motor is connected to the axle of the power wheel N215a.

[0073] In embodiment two, the lifting mechanism is a rack and pinion winding lifting mechanism, wherein,

[0074] refer to Figure 9 and Figure 10 , Figure 9 A schematic diagram of the rack winding lifting mechanism in an embodiment of the present invention is shown; Figure 10 A schematic diagram showing the connection between the second curtain and the rack and pinion winding lifting mechanism in an embodiment of the present invention is shown; wherein,

[0075] Figure 9 and Figure 10 It can be clearly seen that the base is a rack base N211b, the lifting drive is a winding motor, and a winding shaft N215b is inserted into the rack base N211b. One end of the winding shaft N215b passes through the rack base N211b and is connected to the winding motor.

[0076] A set of rack tracks N212b extends downward from both sides of the rack base N211b. A rack groove N214b is opened on the adjacent surface of the set of rack tracks N212b. The rack groove N214b and the racks N213b on the corresponding sides of the curtain slide relative to each other along the length direction.

[0077] refer to Figure 11 , Figure 11 A schematic diagram of a projection system according to an embodiment of the present invention is shown; it can be clearly seen from the schematic diagram that a projection system, using the above-mentioned projection device, includes:

[0078] The recognition system is used to identify whether the user selects forward projection or backward projection.

[0079] If forward projection is selected, the main control system will start the forward projection system, and the projector A and the first screen 12 will be opened to jointly perform the forward projection operation inside the vehicle.

[0080] If rear projection is selected, the rear projection system is started, the projector A and the first screen 12 are turned on, the flip drive component 24 controls the reflector 23 to flip, the detection component 21 collects the flip angle information of the projector A, when the flip angle reaches the preset angle, the main control system controls the flip drive component 24 to turn off and performs phase locking, so that the projector A, the reflector 23 and the second screen 22 jointly perform the in-vehicle rear projection operation.

[0081] Although the present invention 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; and these 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 embodiments of the present invention.

Claims

1. A projection device for forward and backward projection inside a vehicle, with the front of the vehicle as the forward direction, characterized in that, The system includes a forward projection system comprising a projector (A) and a first screen (12). The projector (A) is positioned on the interior roof surface with the camera facing forward. The projection light path of the projector (A) is... l A first screen (12) is arranged on the 1 for performing forward projection operations inside the vehicle; It also includes a rear projection system, which includes a projector (A), a detection element (21), a second screen (22), a reflector (23), and a flip drive assembly (24). The reflector (23) is arranged between the projector (A) and the first screen (12), and the flip drive assembly (24) generates a flipping action. The detection element (21) collects the flipping angle information. The reflector (23) flips until the mirror surface is inserted into the projection light path. l In step 1, a reflected light path is formed. l 2, and the reflected light path l A second screen (22) is arranged on the vehicle. The second screen (22) is arranged at the rear of the vehicle, and there is no obstruction between the rear of the vehicle and the second screen (22). It is used to perform the rearward projection operation inside the vehicle. It also includes a set of lifting mechanisms, which are arranged in a corresponding manner with the second curtain (22) and the first curtain (12), and the second curtain (22) and the first curtain (12) are rolled up or unfolded by the corresponding lifting mechanisms; The flip drive assembly (24) includes a base (240) which is mounted on the interior roof surface; The base (240) is in the shape of an inverted U-shape, and a set of mounting holes are provided on the inner wall of the concave notch. A set of rotating shafts (241) are extended along both sides of the reflector (23). The rotating shafts (241) are inserted into the mounting holes, and the power unit rotates around the axis of the rotating shafts (241) to perform a rotating action. The rotation angle is [not specified]. 0°~90° ; The detection element (21) is an angle sensor, and the contact end of the angle sensor is engaged with the rotating shaft (241).

2. The in-vehicle forward and in-vehicle rearward projection device according to claim 1, characterized in that, The power unit includes a stepper motor (2420) and a geared motor (2421), both mounted on the base (240), which cooperate to provide stable power to the rotating shaft (241); The output shaft of the stepper motor (2420) passes through the base (240) and is connected to the rotating shaft (241); and the geared motor (2421) cooperates with the rotating shaft (241).

3. The in-vehicle forward and in-vehicle rearward projection device according to claim 2, characterized in that, The mirror (23) faces the base (240) and is embedded in the concave notch of the base (240); The reflector (23) is an optical plane reflector, and the mirror surface is made of glass or acrylic with a reflective coating.

4. The in-vehicle forward and in-vehicle rearward projection device according to claim 1, characterized in that, Each set of lifting mechanisms includes a base fixed to the interior roof surface. The upper part of the base conforms to the shape of the interior roof surface, and the lower part forms a guide rail extending downwards along the vehicle body. The base is provided with a lifting drive component, and the lifting drive component drives the guide rail and the corresponding curtain to form a guide rail cooperation along the length direction.

5. A projection device for forward and backward projection within a vehicle according to claim 4, characterized in that, The lifting mechanism is a tire lifting mechanism; The base is a tire base (N211a). A set of winding tracks (N212a) extends downwards on both sides of the tire base (N211a). A guide groove (N213a) is opened on the adjacent surface of the set of winding tracks. Several passive wheels (N214a) and at least one driving wheel (N215a) are arranged at the inflection point of the guide groove (N213a). The belt (N216a) passes around the passive wheels (N214a) and the driving wheel (N215a) in an S-shape. The belt (N216a) is bonded to the two ends of the corresponding curtain respectively. It also includes a tension pulley (N217a), which is interspersed between the drive pulley (N215a) and the driven pulley (N214a) and engages with the belt (N216a); The lifting drive component is a focusing motor, and the output shaft of the focusing motor is connected to the axle of the power wheel (N215a).

6. A projection device for forward and backward projection within a vehicle according to claim 4, characterized in that, The lifting mechanism is a rack and pinion winding lifting mechanism; The base is a rack base (N211b), the lifting drive is a winding motor, and a winding shaft (N215b) is inserted into the rack base (N211b). One end of the winding shaft (N215b) passes through the rack base (N211b) and is connected to the winding motor. A set of rack tracks (N212b) extends downward from both sides of the rack base (N211b), and rack grooves (N214b) are opened on the adjacent surfaces of the set of rack tracks (N212b). The rack grooves (N214b) and the racks (N213b) on the corresponding sides of the curtain are slidably arranged relative to each other along the length direction.

7. A projection device for forward and backward projection within a vehicle according to claim 1, characterized in that, The second screen (22) is made of rear projection front display screen material.

8. A projection device for forward and backward projection within a vehicle according to claim 1, characterized in that, The interior roof panel has pre-drilled screw holes, and the fixing bolts pass through the through holes on the base (240) and are connected to the screw holes.

9. A projection system, employing the projection device according to any one of claims 1-8, characterized in that, include: The recognition system is used to identify whether the user selects forward projection or backward projection. If forward projection is selected, the main control system controls the forward projection system to start, and the projector (A) and the first screen (12) are opened to jointly perform the forward projection operation inside the vehicle. If rear projection is selected, the rear projection system is started, the projector (A) and the second screen (22) are turned on, the flip drive component (24) controls the reflector (23) to flip, the detection component (21) collects the flip angle information of the projector (A), when the flip angle reaches the preset angle, the main control system controls the flip drive component (24) to turn off and performs phase locking, so that the projector (A), the reflector (23) and the second screen (22) jointly perform the rear projection operation in the vehicle.

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