Projection mechanism and vehicle

Abstract

The present application provides a projection mechanism and a vehicle. The projection mechanism comprises a box body, a projector screen, a reeling assembly and a deploying assembly. The deploying assembly comprises mounting bases, a driving source, transmission members, a deploying frame, traction arms and a box cover, wherein the transmission members are arranged in the box body by means of the mounting bases; the driving source is arranged in the box body and is connected to the transmission members; and one end of the deploying frame is articulated to the box body, and the other end of the deploying frame is connected to the box cover. In the present application, lead-screw rotating shafts and nuts engage with each other for transmission, and the lead-screw rotating shafts and the nuts have self-locking capability, and are both mechanical mechanisms, with a low failure rate. Compared with using a solenoid valve for locking, the present application can reduce the failure rate, and can also avoid clicking noise generated by the solenoid valve during locking and unlocking, thereby improving the user experience.

Description

Projection mechanism and vehicle Technical Field

[0001] This invention relates to the field of projection equipment technology, and in particular to a projection mechanism and vehicle. Background Technology

[0002] As car ownership becomes increasingly widespread, cars are no longer just a means of transportation, but also mobile terminal products integrating multiple lifestyle functions. The functions of in-vehicle systems are gradually becoming richer, and in-vehicle audio-visual systems are no exception. However, currently, in-vehicle entertainment is almost entirely limited to viewing on the small screen provided by the in-vehicle control panel, resulting in a poor viewing experience. Meanwhile, some car owners have a demand for a better in-vehicle environment and atmosphere. Therefore, in-vehicle projection products that can meet these needs have emerged.

[0003] The projection mechanism consists of a projection screen and an unfolding assembly. Currently available in-vehicle projection screens have poor shock resistance; during vehicle movement, the retracted screen can easily unfold on its own due to vehicle vibrations, causing inconvenience to users. To solve this problem, existing technology uses a solenoid valve-based locking mechanism to secure the unfolding assembly. When the projection screen is fully unfolded or fully closed, the locking mechanism locks the assembly, preventing the screen from unfolding automatically due to vehicle vibrations. However, this method of locking the unfolding assembly using a solenoid valve has the following drawbacks:

[0004] 1. The shock resistance of the projection screen mainly relies on the locking mechanism of the solenoid valve to lock the unfolding components. This mechanism is mainly controlled by electrical structure and is prone to failure. If the solenoid valves on both sides are not energized synchronously, it will cause the projection screen to tilt.

[0005] 2. The solenoid valve lock can only be locked when the projection screen is fully opened or fully closed. It cannot be locked during the opening of the projection screen, meaning the projection screen can only be used when fully open or fully closed.

[0006] 3. When the projection screen is fully extended, the solenoid valve locks the extension assembly. However, the projection screen is usually in a slack state beyond the locked position, so it needs to retract a few millimeters to tuck in. When the projection screen needs to be closed, it must first become slack (the solenoid valve and extension assembly are locked in the taut state) before retracting. This movement method is cumbersome, the mechanism is low-end, and the unlocking and locking of the solenoid valve produces a clicking noise, resulting in poor auditory experience.

[0007] 4. During vehicle movement, the screen will vibrate, causing the projected image to vibrate and potentially causing motion sickness in passengers. Summary of the Invention

[0008] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a projection mechanism and vehicle to solve the problems of the prior art, such as the projection mechanism only being able to be used fully open or fully closed, the solenoid valve being prone to failure when locking the deployment component in the projection mechanism using a solenoid valve as a locking head, and the clicking noise caused by the opening and closing of the solenoid valve during operation.

[0009] To achieve the above and other related objectives, the present invention provides a projection mechanism for use in a vehicle. The projection mechanism includes a housing, a projection screen, a roll-back assembly, and an unfolding assembly. The unfolding assembly includes a mounting base, a drive source, a transmission component, an unfolding frame, a traction arm, and a housing cover. The transmission component is disposed within the housing via the mounting base, and the drive source is disposed within the housing and connected to the transmission component. One end of the unfolding frame is hinged to the housing, and the other end is connected to the housing cover. One end of the traction arm is movably connected to the transmission component, and the other end is connected to the unfolding frame. The drive source drives the traction arm to move via the transmission component, and the traction arm drives the unfolding frame to unfold and close. The roll-back assembly is disposed within the housing, one end of the projection screen is connected to the roll-back assembly, and the other end is connected to the housing cover. When the unfolding frame unfolds, the housing cover moves away from the housing, and the projection screen unfolds from the roll-back assembly. When the unfolding frame closes, the housing cover retracts to the end of the housing, and the projection screen rolls back onto the roll-back assembly.

[0010] Preferably, the drive source is a dual-axis motor, the transmission components are a lead screw shaft and a nut, the dual-axis motor is disposed in the housing, and the two output ends of the dual-axis motor are respectively connected to the lead screw shaft; the mounting base is disposed in the housing and located at the end of the lead screw shaft away from the dual-axis motor, and the lead screw shaft is rotatably disposed in the mounting base; the nut is disposed on the lead screw shaft, and one end of the traction arm is connected to the nut.

[0011] Preferably, the mounting base is provided with a first sensor, which is communicatively connected to the drive source. The first sensor cooperates with a nut to stop the drive source from working when the unfolding frame is fully unfolded. The box body is provided with a second sensor, which is communicatively connected to the drive source. The second sensor cooperates with the box cover to stop the drive source from working when the unfolding frame is fully closed. The system also includes a control system, which is communicatively connected to the first sensor, the second sensor, and the drive source.

[0012] Preferably, a rotary encoder is also provided, which is connected to the drive source and controls the drive source through the rotary encoder.

[0013] Preferably, the mounting base is provided with a bearing assembly, and the lead screw shaft is rotatably mounted in the mounting base via the bearing assembly; the bearing assembly is used to lubricate the rotation of the lead screw shaft and to bear the axial force of the lead screw shaft during operation.

[0014] Preferably, the unfolding frame includes an unfolding arm, which includes an upper arm and a lower arm. The top end of the upper arm is hinged to the mounting base, and the bottom end of the upper arm is hinged to the top end of the lower arm. The bottom end of the lower arm is hinged to the cover. The top side of the upper arm is hinged to the end of the traction arm away from the nut. There are two unfolding arms, two lead screw shafts, and two nuts, which are symmetrically arranged on both sides of the dual-axis motor.

[0015] Preferably, the bottom end of the upper arm is provided with an upper arm bottom end connection hole, and the top end of the lower arm is provided with a lower arm top end connection hole. The upper arm bottom end connection hole and the lower arm top end connection hole are aligned, and a first hinge member passes through them.

[0016] Preferably, a stop groove is provided on the side of the upper arm near the lower arm, and a stop boss is provided on the side of the lower arm near the upper arm; or a stop boss is provided on the side of the upper arm near the lower arm, and a stop groove is provided on the side of the lower arm near the upper arm; the stop groove and the stop boss can abut against each other to limit the unfolding angle of the unfolding arm.

[0017] Preferably, the lower arm has a lower arm bottom connection hole at its bottom end, the lid has a lid connecting seat, the lid connecting seat has a connecting seat hinge hole, the lower arm bottom connection hole is aligned with the connecting seat hinge hole and a second hinge member passes through the two; a shock-absorbing component is also provided between the lower arm and the lid.

[0018] To achieve the above or other objectives, the present invention also discloses a vehicle including the aforementioned projection mechanism. The vehicle includes a body and an interior trim, the interior trim covering the inner surface of the body. The box includes an upper box and a lower box, the upper box being fixed to the top surface of the body, and the interior trim covering the outer periphery of the upper box. The lower box is disposed on the bottom surface of the upper box, and the bottom surface of the lower box and the bottom surface of the interior trim are on the same horizontal plane. A through slot is provided on the lower box, and when the unfolded frame is closed, the box cover covers the through slot of the lower box. The vehicle also includes a projector, the image of which is projected onto a projection screen.

[0019] As described above, the projection mechanism and vehicle of the present invention have the following beneficial effects:

[0020] 1. The projection mechanism and vehicle involved in this invention adopt a transmission method using a lead screw shaft and nut. The lead screw shaft and nut are self-locking and are both mechanical mechanisms with a low failure rate. Compared with the existing technology that uses a solenoid valve for locking, this not only reduces the failure rate but also eliminates the clicking noise generated when the solenoid valve locks and opens, thus improving the user experience.

[0021] 2. The projection mechanism and vehicle involved in this invention are equipped with a rotary encoder on the drive source, which can stop at any position on the projection screen, thereby providing users with more projection screen sizes and improving the user experience.

[0022] 3. The projection mechanism and vehicle involved in this invention have a shock-absorbing component between the lower arm and the cover. During vehicle operation, the shock-absorbing component can effectively counteract the vibration caused by the vehicle, thereby avoiding the vibration of the projected image caused by the poor stability of the projection screen in the prior art, which could lead to motion sickness in the user. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the projection mechanism of the present invention when it is closed;

[0024] Figure 2 is a schematic diagram of the projection mechanism of the present invention when it is unfolded;

[0025] Figure 3 is an exploded view of the projection mechanism involved in this invention when it is deployed;

[0026] Figure 4 is a schematic diagram of the first angle of the unfolding frame in the projection mechanism involved in the present invention;

[0027] Figure 5 is a second angle schematic diagram of the unfolding frame in the projection mechanism of the present invention;

[0028] Figure 6 is an enlarged view of point A in Figure 5;

[0029] Figure 7 is an enlarged view of point B in Figure 5;

[0030] Figure 8 is a schematic diagram of the interior of the projection mechanism of the present invention when the unfolded frame is closed; (half of the unfolded frame is shown).

[0031] Figure 9 is a schematic diagram of the interior of the projection mechanism of the present invention when the unfolding frame is unfolded; (half of the unfolding frame is shown).

[0032] Figure 10 is a schematic diagram of the operation of the projection mechanism involved in this invention;

[0033] Figure 11 is a side sectional view of the projection mechanism of the present invention when it is unfolded;

[0034] Figure 12 is a first-angle side cross-sectional view of the projection mechanism of the present invention when it is closed;

[0035] Figure 13 is a second-angle side cross-sectional view of the projection mechanism of the present invention when it is closed;

[0036] Figure 14 is a bottom view of the projection mechanism of the present invention when it is closed;

[0037] Figure 15 is a cross-sectional view of the projection mechanism of the present invention along the axis of the lead screw shaft;

[0038] Figures 16 and 17 show a second embodiment of the anti-vibration component of the projection mechanism involved in the present invention;

[0039] Figures 18 and 19 show the third embodiment of the anti-vibration component of the projection mechanism involved in this invention.

[0040] Explanation of reference numerals in the attached drawings: 1. Box body; 101. Upper box body; 102. Lower box body; 2. Rewind assembly; 201. Rewind shaft; 202. Rewind spring; 203. Outer tube; 3. Projection screen; 4. Unfolding frame; 401. Mounting base; 4011. Bearing assembly; 402. Lead screw shaft; 403. Coupling; 404. Drive source; 405. Motor shaft; 406. Nut; 407. Traction arm; 408. Upper arm; 4081. Upper arm bottom connection hole; 4082. Stop groove; 409. Lower arm; 4091. Lower arm top connection hole; 4092. Stop boss; 4093. Lower arm bottom connection hole; 4094. First spring fixing hole; 4095. Pin; 4 10. First sensor; 411. Second sensor; 412. First hinge; 4121. Optical axis section; 4122. Threaded section; 413. Washer; 414. Helical spring; 415. Cover; 4151. Cover connecting seat; 4152. Connecting seat hinge hole; 4153. Slide groove; 4154. Connecting rod; 4155. Pin hole; 4156. Connecting rod teeth; 4157. Gear; 4158. Flexible rack; 4159. Steel wire rope; 416. Second hinge; 5. Projector. Detailed Implementation

[0041] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0042] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0043] This invention provides a projection mechanism. For ease of description, the length direction of the box 1 is defined as the left-right direction, the width direction of the box 1 is defined as the front-back direction, and the height direction of the box 1 is defined as the up-down direction. As shown in Figure 5, the left and right directions of the paper are the left and right directions, the top and bottom directions of the paper are the top and bottom directions, and the front and back of the paper are the front and back directions.

[0044] As shown in Figures 1-19, this invention provides a projection mechanism for use in a vehicle. The projection mechanism includes a housing 1, a projection screen 3, a roll-back assembly 2, and an unfolding assembly. The unfolding assembly includes a mounting base 401, a drive source 404, a transmission component, an unfolding frame 4, a traction arm 407, and a housing cover 415. The transmission component is mounted in the housing 1 via the mounting base 401, and the drive source 404 is mounted in the housing 1 and connected to the transmission component. The top end of the unfolding frame 4 is hinged to the housing 1, and the bottom end of the unfolding frame 4 is connected to the housing cover 415. The top end of the traction arm 407 is movable. The bottom end of the traction arm 407 is connected to the unfolding frame 4 via the transmission component; the drive source 404 drives the traction arm 407 to move through the transmission component, and the traction arm 407 drives the unfolding frame 4 to unfold and close; the rewind assembly 2 is set in the housing 1, the top end of the projection screen 3 is connected to the rewind assembly 2, and the bottom end of the projection screen 3 is connected to the housing cover 415; when the unfolding frame 4 unfolds, the housing cover 415 moves away from the housing 1, and the projection screen 3 unfolds from the rewind assembly 2; when the unfolding frame 4 closes, the housing cover 415 retracts back to the end of the housing 1, and the projection screen 3 retracts onto the rewind assembly 2.

[0045] The projection mechanism of the present invention uses a drive source 404 to drive a traction arm 407 to move via a transmission component. The traction arm 407 drives the unfolding frame 4 to unfold and close. The position of the traction arm 407 on the transmission component is adjustable. Thus, when the unfolding frame 4 is fully unfolded or fully closed, the traction arm 407 is stationary on the transmission component. The bottom end of the traction arm 407 is connected to the unfolding frame 4. That is, the unfolding frame 4 relies on the traction arm 407 to provide force, which solves the problem of clicking noise caused by the electromagnetic valve limiting the position when the projection screen 3 is fully open or fully closed in the prior art.

[0046] Preferably, as shown in Figures 3-5, the drive source 404 is a dual-axis motor, and the transmission components are a lead screw shaft 402 and a nut 406. The dual-axis motor is housed in the housing 1, and its two output ends are respectively connected to the lead screw shaft 402. The mounting base 401 is located on the top surface of the housing 1, at the end of the lead screw shaft 402 furthest from the dual-axis motor, and the lead screw shaft 402 is rotatably mounted in the mounting base 401. The nut 406 is mounted on the lead screw shaft 402, and the top end of the traction arm 407 is connected to the nut 406. The two output ends of the dual-axis motor can be achieved through two motor shafts 405, which are concentric.

[0047] In this embodiment, the top end of the drive source 404 is fixedly connected to the top end of the housing 1. The two output ends of the dual-axis motor are connected to the lead screw shaft 402 via a coupling 403. The coupling 403 is used to absorb machining and installation errors between the output ends of the drive source 404 and the lead screw shaft 402. The nut 406 is selected from lead screw nuts (internal and external thread fit) or ball nuts (ball groove and ball fit). The top end of the traction arm 407 is connected to the nut 406. When the lead screw shaft 402 rotates, the nut 406 will move left and right along the lead screw shaft 402, and the traction arm 407 will also move left and right with the nut 406, thereby applying unfolding and closing forces to the unfolding frame 4.

[0048] Preferably, as shown in Figures 3, 4, and 15, a first sensor 410 is provided on the mounting base 401. The first sensor 410 is communicatively connected to the drive source 404. The first sensor 410 cooperates with the nut 406 to stop the drive source 404 from working when the unfolding frame 4 is fully unfolded. A second sensor 411 is provided on the box body 1. The second sensor 411 is communicatively connected to the drive source 404. The second sensor 411 cooperates with the box cover 415 to stop the drive source 404 from working when the unfolding frame 4 is fully closed. The system also includes a control system, which is communicatively connected to the first sensor 410, the second sensor 411, and the drive source 404.

[0049] In this embodiment, there is one first sensor 410, which is mounted on any of the mounting bases 401. When the drive source 404 drives the lead screw shaft 402 to rotate, the two nuts 406 move to the left and right along the lead screw shaft 402, respectively. The nuts 406 drive the two traction arms 407 to move to the left and right, respectively. The unfolding frame 4 gradually unfolds, the cover 415 gradually moves down, and the projection screen 3 is gradually pulled open. When the nuts 406 move to the farthest point on the left and right sides, the unfolding frame 4 is fully unfolded, the cover 415 moves to the lowest point, and the projection screen 3 is fully pulled open. At this time, the nuts 406 come into contact with the first sensor 410, and the first sensor 410 will feed back information to the control system. The control system controls the drive source 404 to stop driving.

[0050] The top of the second sensor 411 is fixedly connected to the top surface of the housing 1. When the drive source 404 drives the lead screw shaft 402 to rotate in the opposite direction, the two nuts 406 move towards the center along the lead screw shaft 402. The nuts 406 drive the two traction arms 407 to move towards the center, the unfolded frame 4 gradually retracts, the housing cover 415 gradually rises, and the projection screen 3 gradually rolls up. When the housing cover 415 rises to contact the second sensor 411, the second sensor 411 will send feedback information to the control system. The control system will then control the drive source 404 to stop driving, and the projection screen 3 will completely roll up. The first sensor 410 and the second sensor 411 can be microswitches.

[0051] Furthermore, in this embodiment, a rotary encoder is also provided, which is connected to the drive source 404 to control the drive source 404. The rotary encoder is used to detect the rotation angle of the drive source 404. The consumer can set the rotation angle of the drive source 404 through the control system. The rotary encoder detects the rotation angle of the drive source 404 in real time. When the drive source 404 reaches the set rotation angle, the rotary encoder feeds back information to the control system, and then the control system controls the drive source 404 to stop driving. The projection screen 3 will then be in a half-open state, thus providing the consumer with more usable space.

[0052] Preferably, as shown in Figure 15, a bearing assembly 4011 is provided in the mounting base 401, and the lead screw shaft 402 is rotatably mounted in the mounting base 401 via the bearing assembly 4011. The bearing assembly 4011 is used to lubricate the rotation of the lead screw shaft 402 and to bear the axial force of the lead screw shaft 402 during operation. In this embodiment, since the nut 406 can move to the left and right on the lead screw shaft 402, that is, the lead screw shaft 402 will apply an axial force to the left or right during rotation. Therefore, the bearing assembly 4011 needs to bear both the weight of the transmission components and the unfolding frame 4, and also the axial force. Therefore, when ordinary bearings are used, they are easily damaged by axial force during long-term use. To extend the service life of the bearing assembly 4011, a bearing assembly 4011 (i.e., two bearings) can be formed by combining ordinary bearings and end face bearings, or a bearing that can bear both rotational force and axial force simultaneously (e.g., a thrust bearing) can be used.

[0053] To further reduce the gravitational load on the transmission components and the unfolded frame 4 borne by the bearing assembly 4011, several mounting seats 401 can be provided on the outer circumferential surface of the lead screw shaft 402. Each mounting seat 401 contains a bearing assembly 4011. By using multiple mounting seats 401 and bearing assemblies 4011, the gravitational load and axial force are distributed, extending the service life of the equipment. In this embodiment, a total of four mounting seats 401 are symmetrically arranged on the left and right sides of the drive source 404.

[0054] Preferably, as shown in Figures 3-5 and 7, the unfolding frame 4 includes an unfolding arm, which includes an upper arm 408 and a lower arm 409. The top end of the upper arm 408 is hinged to the mounting base 401, and the bottom end of the upper arm 408 is hinged to the top end of the lower arm 409. The bottom end of the lower arm 409 is hinged to the cover 415. The top side of the upper arm 408 is hinged to the bottom end of the traction arm 407. There are two unfolding arms, two lead screw shafts 402, and two nuts 406, which are symmetrically arranged on both sides of the dual-axis motor.

[0055] Preferably, as shown in Figure 6, the lower end of the upper arm 408 has an upper arm bottom connection hole 4081, and the upper end of the lower arm 409 has a lower arm top connection hole 4091. The upper arm bottom connection hole 4081 and the lower arm top connection hole 4091 are aligned, and a first hinge member 412 passes through them. In this embodiment, the upper arm bottom connection hole 4081 is a threaded hole, and the lower arm top connection hole 4091 is a through hole; in other embodiments, the upper arm bottom connection hole 4081 is a through hole, and the lower arm top connection hole 4091 is a threaded hole. The key is to achieve a hinge connection between the upper arm bottom connection hole 4081 and the lower arm top connection hole 4091 via the first hinge member 412.

[0056] In this embodiment, as shown in FIG. 6, the upper arm 408 and the lower arm 409 form a V-shaped connecting rod. When the deployment frame 4 is gradually deployed from the folded state, the included angle between the upper arm 408 and the lower arm 409 gradually increases. When it is fully deployed, the included angle between the upper arm 408 and the lower arm 409 is in the maximum state. The first hinge 412 includes a threaded section 4122 and a smooth shaft section 4121. The threaded section 4122 is connected to the connection hole 4081 at the bottom end of the upper arm, and the smooth shaft section 4121 is connected to the connection hole 4091 at the top end of the lower arm. The lower arm 409 can swing around the smooth shaft section 4121, thus realizing the hinge between the upper arm 408 and the lower arm 409. Additionally, a gasket 413 is provided between the opposite surfaces of the upper arm 408 and the lower arm 409 to limit the axial movement of the lower arm 409, for preventing the axial movement of the lower arm 409 on the smooth shaft section 4121, and further preventing the front-back晃动 of the lower arm 409 when the vehicle is running. The case where the threaded section 4122 is connected to the connection hole 4091 at the top end of the lower arm and the smooth shaft section 4121 is connected to the connection hole 4081 at the bottom end of the upper arm is similar to the above, and will not be repeated here.

[0057] Preferably, as shown in FIG. 6, a stop groove 4082 is provided on the front side surface of the upper arm 408, and a stop boss 4092 is provided on the rear side surface of the lower arm 409; or a stop boss 4092 is provided on the front side surface of the upper arm 408, and a stop groove 4082 is provided on the rear side surface of the lower arm 409; the stop groove 4082 and the stop boss 4092 can be abutted against each other to limit the deployment angle of the deployment arm. In this embodiment, when the deployment frame 4 is fully opened, the stop boss 4092 will abut against the edge of the stop groove 4082 to prevent the over-opening of the deployment arm and damage the components. Additionally, when the stop boss 4092 and the stop groove 4082 are abutted against each other, it can also effectively resist the vibration generated during the running of the vehicle and prevent the shaking of the projection screen 3 caused by the bumpy driving of the vehicle.

[0058] In this embodiment, the stop boss 4092 and the stop groove 4082 limit the V-shaped connecting rod within 180°, that is, when the deployment frame 4 is fully deployed, the upper arm 408 and the lower arm 409 will be on the same vertical line, and the deployment frame 4, the box cover 415, and the box body 1 will form a "square" shape.

[0059] Preferably, as shown in Figure 7, the lower arm 409 has a lower arm bottom end connecting hole 4093 at its bottom end, and the cover 415 has a cover connecting seat 4151. The cover connecting seat 4151 has a connecting seat hinge hole 4152. The lower arm bottom end connecting hole 4093 and the connecting seat hinge hole 4152 are aligned, and a second hinge member 416 passes through them. A shock-absorbing component is also provided between the lower arm 409 and the cover 415. In this embodiment, the lower arm bottom end connecting hole 4093 is a threaded hole, and the connecting seat hinge hole 4152 is a through hole. In other embodiments, the lower arm bottom end connecting hole 4093 is a through hole, and the connecting seat hinge hole 4152 is a threaded hole, as long as the lower arm bottom end connecting hole 4093 and the connecting seat hinge hole 4152 can be hinged together by the second hinge member 416.

[0060] In this embodiment, the second hinge member 416 includes a threaded section and a smooth shaft section. The threaded section is connected to the lower arm bottom end connection hole 4093, and the smooth shaft section is connected to the connecting seat hinge hole 4152. The lower arm 409 and the cover 415 can be hinged and swing. Additionally, a washer 413 is provided between the opposing surfaces of the lower arm 409 and the cover connecting seat 4151 to limit the axial movement of the cover 415, preventing the cover 415 from moving axially along the smooth shaft section, thereby preventing the cover 415 from swaying back and forth during vehicle movement. The case where the threaded section is connected to the connecting seat hinge hole 4152 and the smooth shaft section is connected to the lower arm bottom end connection hole 4093 is the same as described above and will not be repeated here. The first hinge member 412 and the second hinge member 416 can be plug bolts.

[0061] Furthermore, to prevent the projection screen 3 from swaying left and right or up and down due to vehicle bumps or personnel touching it when the unfolded frame 4 is in the unfolded state (including half-open and fully open), a shock-absorbing component is also provided between the lower arm 409 and the cover 415 in this application. The specific structures of several shock-absorbing components disclosed in this application are shown below, but other structures that can achieve the anti-vibration function are also within the protection scope of this application.

[0062] First embodiment: The shock-absorbing component adopts a helical spring 414.

[0063] Taking the connection between the lower arm 409 on the left and the lid 415 as an example. As shown in Figure 7, a first spring fixing hole 4094 is provided on the side of the lower arm 409 near the lid 415, and a second spring fixing hole is provided on the side of the lid connecting seat 4151 near the lower arm 409. A coil spring 414 is sleeved on the outer periphery of the second hinge 416, and the two ends of the coil spring 414 are respectively fixed in the first spring fixing hole 4094 and the second spring fixing hole.

[0064] Since the fully unfolded frame 4 in this application forms a "U" shape, meaning the maximum angle between the lower arm 409 and the cover 415 is 90°, during installation, the lower arm 409 and the cover 415 are first aligned at an obtuse angle with the connecting hole 4093 at the bottom of the lower arm and the hinge hole 4152 of the connecting seat. Then, the coil spring 414 and the second hinge 416 are installed. The lower arm 409 is then rotated so that the angle between the lower arm 409 and the cover 415 is less than 90° before the lower arm 409 is hinged to the upper arm 408. At this time, the coil spring 414 will generate a torque that rotates towards the obtuse angle. Because the angle of the projection screen 3 when unfolded or closed is less than 90°, there is always an outward unfolding torque between the lower arm 409 and the cover 415. This torque can be decomposed into an outward pushing force on the lower arm 409 and a downward pushing force on the cover 415. Correspondingly, the connection between the lower arm 409 on the right and the lid 415 is the same as the connection described above, and will not be repeated here.

[0065] Thus, when the vehicle vibrates from side to side or when a person applies a force in the left or right direction, the force on the unfolding frame 4 in the left or right direction is offset or weakened by the outward pushing force of the coil spring 414. When the vehicle vibrates up and down or when a person applies a force in the upward direction, the force on the unfolding frame 4 in the up and down direction is offset or weakened by the downward pushing force of the coil spring 414, thereby ensuring the stability of the unfolding frame 4 and the projection screen 3 and achieving an anti-vibration effect.

[0066] Second embodiment: The shockproof component adopts connecting rod 4154 and gear 4157.

[0067] Taking the connection between the lower arm 409 on the left and the cover 415 as an example. As shown in Figures 16 and 17, the lower arm 409 and the cover 415 are normally connected by the cover connecting seat 4151 and the second hinge 416. A pin 4095 is provided on the outer circle of the lower end face of the lower arm 409. The cover 415 has a left-side sliding groove 4153, and a left-side connecting rod 4154 is provided in the left-side sliding groove 4153. A pin hole 4155 is provided at the left end of the left-side connecting rod 4154, and several connecting rod teeth 4156 are provided on the rear side of the right end of the left-side connecting rod 4154. A gear 4157 is provided on the cover 415 in the horizontal direction (the rotation trajectory of the gear 4157 is clockwise or counterclockwise on the horizontal plane), and the left-side connecting rod teeth 4156 mesh with the gear 4157. Correspondingly, the connection between the lower arm 409 on the right and the cover 415 is the same as the connection described above, and will not be repeated here. However, it should be noted that the connecting rod teeth 4156 on the left and the connecting rod teeth 4156 on the right mesh on the same gear 4157.

[0068] As the projection screen 3 unfolds, the left lower arm 409 rotates around the second hinge 416, and the pin 4095 drives the left connecting rod 4154 to move to the right. Then, the connecting rod teeth 4156 drive the gear 4157 to mesh and rotate. The right lower arm 409 rotates around the second hinge 416, and the pin 4095 drives the right connecting rod 4154 to move to the left. Then, the connecting rod teeth 4156 drive the gear 4157 to mesh and rotate. When the projection screen 3 stops unfolding, the connecting rod teeth 4156 on both the left and right sides simultaneously mesh with the gear 4157. The left and right connecting rods 4154 are linked, ensuring stability between the two lower arms 409 and the cover 415. The right connecting rod 4154 is equipped with an adapter plate for meshing with the gear 4157.

[0069] When the vehicle vibrates from side to side or when a person applies a force in the left or right direction, the left and right forces on the unfolding frame 4 are absorbed by the connecting rod teeth 4156 and gear 4157. For example, if the lower arm 409 on the left is subjected to a force to the right, then the connecting rod 4154 on the left moves to the right, and the connecting rod teeth 4156 on the left drives the gear 4157 to rotate. However, the lower arm 409 on the right is not subjected to a force to the left, so the rotation of the gear 4157 will be canceled out by the meshing force between the connecting rod teeth 4156 and the gear 4157 on the right. Conversely, the rightward force on the unfolding frame 4 will also be canceled out, thus achieving the cancellation or reduction of forces in the left and right directions. If the lower arm 409 on the left is subjected to a force to the right, and the lower arm 409 on the right is subjected to a force to the left, the gear 4157 will rotate. However, since the upper arm 408 and the lower arm 409 are provided with a stop boss 4092 and a stop groove 4082, the offset of the top of the lower arm 409 will be blocked, and the unfolded frame 4 will not swing.

[0070] When the vehicle bumps up and down or when a person applies a force in the up and down direction, the upper arm 408 is connected to the lead screw shaft 402 via a nut 406 and a traction arm 407. Since the nut 406 and the lead screw shaft 402 have a self-locking function, only the lower arm 409 will swing when the unfolding frame 4 is subjected to a force in the up and down direction. However, because the lower arm 409 is connected to the connecting rod 4154 by a pin 4095, a pin hole 4155, connecting rod teeth 4156, and a gear 4157, the swing of the lower arm 409 is restricted. Therefore, when the swing of the lower arm 409 is restricted, the unfolding frame 4 will not move up and down. In other words, the force on the unfolding frame 4 in the up and down direction is offset by the shock-absorbing components, achieving a shock-resistant effect.

[0071] In addition, in this embodiment, the connection between the pin 4095 and the pin hole 4155 can be replaced by interlocking teeth, such as teeth on the lower end face of the lower arm 409, and corresponding teeth on the end of the connecting rod 4154. In other embodiments, other methods can also be used, as long as the swing of the lower arm 409 can drive the movement of the connecting rod 4154.

[0072] Third embodiment: The shock-absorbing component adopts a flexible rack 4158 and a gear 4157.

[0073] As shown in Figures 18 and 19, the difference between this embodiment and the second embodiment described above is that the connecting rod 4154 in the second embodiment is replaced by a flexible rack 4158 and a steel wire rope 4159. The flexible rack 4158 is disposed on the outer circumferential surface of the steel wire rope 4159. One end of the flexible rack 4158 is connected to the lower arm 409 for transmission, and the other end is meshed with a gear 4157. The steel wire rope 4159 serves to straighten the flexible rack 4158.

[0074] In this embodiment, the flexible rack 4158 can be directly engaged with the lower arm 409 (lower arm teeth are provided on the outer circle of the lower end face of the lower arm 409), or indirectly connected through an intermediate part (using a pin 4095 and a pin hole 4155).

[0075] The working process of the shock-absorbing component in this embodiment is basically similar to that in the second embodiment, and will not be repeated here.

[0076] Preferably, as shown in Figures 10-13, the rewind assembly 2 includes a rewind shaft 201, an outer tube 203, and a rewind spring 202. The rewind shaft 201 is fixed in the housing 1. The rewind spring 202 is sleeved on the outer periphery of the rewind shaft 201, and the outer tube 203 is sleeved on the outer periphery of the rewind spring 202. One end of the rewind spring 202 is fixedly connected to the rewind shaft 201, and the other end is fixedly connected to the outer tube 203. One end of the projection screen 3 is connected to the outer tube 203. When the projection screen 3 is unfolded, the outer tube 203 rotates, and the rewind spring 202 is subjected to tensile deformation, thereby providing a reaction force to keep the projection screen 3 taut. When the projection screen 3 is rolled up, the reaction force of the rewind spring 202 drives the outer tube 203 to rotate in the opposite direction, thus rolling the projection screen 3 onto the outer tube 203.

[0077] To achieve the above or other objectives, the present invention also discloses a vehicle including the aforementioned projection mechanism. The vehicle includes a body and an interior trim, with the interior trim covering the inner surface of the body. As shown in Figures 1-3, the box 1 includes an upper box 101 and a lower box 102. The upper box 101 is fixed to the top surface of the body, and the interior trim covers the outer periphery of the upper box 101. The lower box 102 is disposed on the bottom surface of the upper box 101, and the bottom surface of the lower box 102 is at the same horizontal level as the bottom surface of the interior trim. A through slot is provided on the lower box 102, and when the unfolded frame 4 is closed, the box cover 415 covers the through slot of the lower box 102. The invention also includes a projector 5, and the pattern of the projector 5 is projected onto the projection screen 3.

[0078] The projection mechanism and vehicle involved in this invention operate on the following principle:

[0079] First, the operators produce and assemble each component according to Figures 1-19 and the descriptions of each component.

[0080] Secondly, when the operator needs to use the projection mechanism, the drive source 404 is turned on through the control system. The rotation of the drive source 404 drives the lead screw shaft 402 to rotate. The two nuts 406 move to the left and right respectively on the lead screw shaft 402. The two traction arms 407 follow the two nuts 406 to move to the left and right (the traction arms 407 swing at points A and B in the figure). The traction arms 407 apply a force to the upper arm 408. The upper arm 408 will swing at the hinge point (point C in Figure 8) between the top of the upper arm 408 and the box cover connecting seat 4151. That is, the upper arm 408 will drive the lower arm 409 to swing diagonally downward. Under the downward swinging force of the upper arm 408 and the gravity of the lower arm 409 and the cover 415, the lower arm 409 will swing around the optical axis segment 4121 of the first hinge 412 (point D in Figure 8) as the hinge point. The second hinge 416 assists in the swinging of the lower arm 409 (the lower arm 409 swings around point E in Figure 8). The cover 415 remains horizontal and gradually descends. The projection screen 3 is stretched from the outer tube 203 by the tensile force, and the return spring 202 generates tensile force. When one of the nuts 406 moves on the lead screw shaft 402 to abut against the first sensor 410, the first sensor 410 will feed back information to the control system. The control system receives the information and then stops the drive of the drive source 404, and the cover 415 stops descending. At this time, the unfolding frame 4 is fully unfolded, and the stop boss 4092 between the upper arm 408 and the lower arm 409 is just locked in the stop groove 4082.

[0081] Then, as shown in Figure 10, the operator turns on the projector 5 through the control system. The pattern in the projector 5 is projected onto the projection screen 3 for passengers to view.

[0082] Finally, when the projection mechanism needs to be shut down, the drive source 404 is turned on in reverse by the control system. The drive source 404 drives the lead screw shaft 402 to rotate in the opposite direction. The two nuts 406 move closer to the center on the lead screw shaft 402, and the two traction arms 407 follow the two nuts 406 to move closer to the center wheel. The traction arms 407 apply a force to the upper arm 408, causing the upper arm 408 to swing at the hinge point between the top of the upper arm 408 and the cover connecting seat 4151. That is, the upper arm 408 will drive the lower arm 409 to swing obliquely upward. Under the oblique upward swinging force of the upper arm 408, the lower arm 409 will swing around the optical axis segment 4121 of the first hinge member 412 as the hinge point. The second hinge member 416 assists the swinging of the lower arm 409. The cover 415 is always in the horizontal direction and gradually rises. The tension of the return spring 202 drives the outer tube 203 to rotate, and the projection screen 3 rolls back onto the outer tube 203. When the lid 415 rises to abut against the second sensor 411, the second sensor 411 will send information to the control system. The control system receives the information and then stops the drive source 404, and the lid 415 stops rising. At this time, the unfolding frame 4 is fully closed, and the bottom surface of the lid 415 just covers the through groove of the lower box body 102.

[0083] Preferably, when the passenger needs the projection screen 3 to be in the middle position, the operator sets the rotation angle of the drive source 404 through the control system. The rotary encoder detects the rotation angle of the drive source 404 in real time. When the rotation angle of the drive source 404 reaches the set rotation angle, the rotary encoder feeds back information to the control system. Then the control system stops the operation of the drive source 404, so that the unfolding frame 4 is in a half-open state, and then the projection screen 3 is in a half-open state.

[0084] The projection mechanism and vehicle involved in this invention have the following beneficial effects:

[0085] 1. The projection mechanism and vehicle involved in this invention adopt a transmission method using a lead screw shaft 402 and a nut 406. The lead screw shaft 402 and the nut 406 are self-locking and are both mechanical mechanisms with a low failure rate. This solves the problems of numerous electronic components, high failure rate, and clicking noise caused by the locking and opening of the solenoid valve in the prior art.

[0086] 2. The projection mechanism and vehicle involved in this invention are equipped with a rotary encoder on the drive source 404, which can provide users with more projection screen 3 sizes and improve the user experience.

[0087] 3. The projection mechanism and vehicle involved in this invention are equipped with shock-absorbing components, which can effectively counteract the vibrations caused by the vehicle during driving, thereby avoiding the phenomenon of motion sickness caused by the poor stability of the projection screen 3 in the prior art.

[0088] 4. The projection mechanism and vehicle involved in this invention use a rewinding shaft 201, a rewinding spring 202, and an outer tube 203 for the projection screen 3. When the projection screen 3 is unfolded, the rewinding spring 202 provides a counterforce to the projection screen 3 at all times, ensuring that the projection screen 3 is always in a taut state.

[0089] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A projection mechanism for use in a vehicle; characterized in that: The projection mechanism includes a housing (1), a projection screen (3), a roll-back assembly (2), and an unfolding assembly. The unfolding assembly includes a mounting base (401), a drive source (404), a transmission component, an unfolding frame (4), a traction arm (407), and a housing cover (415). The transmission component is mounted in the housing (1) via the mounting base (401). The drive source (404) is mounted in the housing (1) and connected to the transmission component. One end of the unfolding frame (4) is hinged to the housing (1), and the other end of the unfolding frame (4) is connected to the housing cover (415). One end of the traction arm (407) is movably connected to the transmission component, and the other end of the traction arm (407) is connected to the unfolding frame (4). The drive source (404) drives the traction arm (407) to move via the transmission component, and the traction arm (407) drives the unfolding frame (4) to unfold and close. The rewind assembly (2) is located in the housing (1). One end of the projection screen (3) is connected to the rewind assembly (2), and the other end of the projection screen (3) is connected to the housing cover (415). When the unfolding frame (4) is unfolded, the housing cover (415) moves away from the housing (1), and the projection screen (3) unfolds from the rewind assembly (2). When the unfolding frame (4) is closed, the housing cover (415) retracts back to the end of the housing (1), and the projection screen (3) rolls up onto the rewind assembly (2).

2. The projection mechanism according to claim 1, characterized in that: The drive source (404) is a dual-axis motor, the transmission components are a lead screw shaft (402) and a nut (406), the dual-axis motor is installed in the housing (1), and the two output ends of the dual-axis motor are respectively connected to the lead screw shaft (402); the mounting base (401) is installed in the housing (1) and located at the end of the lead screw shaft (402) away from the dual-axis motor, the lead screw shaft (402) is rotatably installed in the mounting base (401); the nut (406) is installed on the lead screw shaft (402), and one end of the traction arm (407) is connected to the nut (406).

3. The projection mechanism according to claim 2, characterized in that: The mounting base (401) is provided with a first sensor (410), which is communicatively connected to the drive source (404). The first sensor (410) cooperates with the nut (406) to stop the drive source (404) from working when the unfolding frame (4) is fully unfolded. The box body (1) is provided with a second sensor (411), which is communicatively connected to the drive source (404). The second sensor (411) cooperates with the box cover (415) to stop the drive source (404) from working when the unfolding frame (4) is fully closed. It also includes a control system, which is communicatively connected to the first sensor (410), the second sensor (411), and the drive source (404).

4. The projection mechanism according to claim 1, characterized in that: A rotary encoder is also provided, which is connected to the drive source (404) and the drive source (404) is controlled through the rotary encoder.

5. The projection mechanism according to claim 2, characterized in that: The mounting base (401) is provided with a bearing assembly (4011), and the lead screw shaft (402) is rotatably mounted in the mounting base (401) through the bearing assembly (4011); the bearing assembly (4011) is used to lubricate the rotation of the lead screw shaft (402) and to bear the axial force of the lead screw shaft (402) during operation.

6. The projection mechanism according to claim 2, characterized in that: The unfolding frame (4) includes an unfolding arm, which includes an upper arm (408) and a lower arm (409). The top end of the upper arm (408) is hinged to the mounting base (401), and the bottom end of the upper arm (408) is hinged to the top end of the lower arm (409). The bottom end of the lower arm (409) is hinged to the cover (415). The top side of the upper arm (408) is hinged to the end of the traction arm (407) away from the nut (406). The number of each of the unfolding arm, lead screw shaft (402), and nut (406) is two, and they are symmetrically arranged on both sides of the dual-axis motor.

7. The projection mechanism according to claim 6, characterized in that: The upper arm (408) has an upper arm bottom connection hole (4081) at its bottom end, and the lower arm (409) has a lower arm top connection hole (4091) at its top end. The upper arm bottom connection hole (4081) and the lower arm top connection hole (4091) are aligned, and a first hinge (412) passes through them.

8. The projection mechanism according to claim 7, characterized in that: A stop groove (4082) is provided on the side of the upper arm (408) near the lower arm (409), and a stop boss (4092) is provided on the side of the lower arm (409) near the upper arm (408); or a stop boss (4092) is provided on the side of the upper arm (408) near the lower arm (409), and a stop groove (4082) is provided on the side of the lower arm (409) near the upper arm (408); the stop groove (4082) and the stop boss (4092) can abut against each other to limit the unfolding angle of the unfolding arm.

9. The projection mechanism according to claim 6, characterized in that: The lower arm (409) has a lower arm bottom connection hole (4093) at its bottom end. The cover (415) is provided with a cover connecting seat (4151). The cover connecting seat (4151) has a connecting seat hinge hole (4152). The lower arm bottom connection hole (4093) and the connecting seat hinge hole (4152) are aligned and a second hinge (416) passes through them. A shockproof component is also provided between the lower arm (409) and the cover (415).

10. A vehicle comprising the projection mechanism according to any one of claims 1-9, characterized in that: The vehicle includes a body and an interior, the interior covering the inner surface of the body; the box (1) includes an upper box (101) and a lower box (102), the upper box (101) is fixed to the top surface of the body, and the interior covers the outer periphery of the upper box (101); the lower box (102) is disposed on the bottom surface of the upper box (101), and the bottom surface of the lower box (102) is on the same horizontal plane as the bottom surface of the interior; a through groove is provided on the lower box (102), and when the unfolding frame (4) is closed, the box cover (415) covers the through groove of the lower box (102); It also includes a projector (5), whose pattern is projected onto a projection screen (3).

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