Vehicle projection screen

Abstract

The application discloses a projection screen for a vehicle. The projection screen for the vehicle comprises a containing box, a screen mechanism and a supporting mechanism. The containing box defines a containing space, and the containing space forms an open port at a bottom wall of the containing box. The screen mechanism is arranged in the containing box, and comprises a winding assembly and a screen. The winding assembly is connected with a fixed end of the screen, and is used for releasing or winding the screen. The supporting mechanism comprises a first supporting rod, a second supporting rod and a first driving member. The first driving member is connected with the first supporting rod and the second supporting rod. An end of the first supporting rod, which is away from the first driving member, extends into the containing box and is pivotally connected with an inner circumferential wall of the containing box. An end of the second supporting rod, which is away from the first driving member, is pivotally connected with an end of the screen, which is away from the containing box. The first driving member is used for driving the second supporting rod to rotate relative to the first supporting rod. The first supporting rod and the second supporting rod can dynamically construct a stable supporting structure during the releasing process of the screen, so that the screen is prevented from being curled.

Description

Technical Field

[0001] This application relates to the field of projection screens, and in particular to a projection screen for vehicles. Background Technology

[0002] In related technologies, automotive projection screens typically use a two-section support frame for unfolding and supporting the screen. The support frames are connected by tension steel cables, and the screen is positioned using a tension spring pivot structure. However, in actual use, the free end of the screen relies mainly on the tension steel cables for support. The tension transmission path is relatively long, making it difficult for the support frame to maintain a stable structure after unfolding. The screen is prone to curling due to uneven stress, affecting the flatness of the screen and the user experience. Utility Model Content

[0003] To minimize screen curling and improve screen flatness and user experience, this application provides a vehicle projection screen.

[0004] The vehicle projection screen provided in this application adopts the following technical solution: A vehicle projection screen includes: a housing box defining a receiving space, the receiving space forming an opening in the bottom wall of the housing box.

[0005] A curtain mechanism is disposed within the receiving box. The curtain mechanism includes a winding assembly and a curtain. The winding assembly is connected and engaged with the fixed end of the curtain. The free end of the curtain is adapted to pass through the opening. The winding assembly is used to release or wind the curtain.

[0006] A support mechanism includes a first support rod, a second support rod, and a first driving member. Along the height direction of the vehicle projection screen, the first driving member is located between the first support rod and the second support rod. The first driving member is connected and engaged with both the first and second support rods. The end of the first support rod away from the first driving member extends into the receiving box and is pivotally connected to the inner peripheral wall of the receiving box. The end of the second support rod away from the first driving member is pivotally connected to the end of the screen away from the receiving box. Both the first and second support rods are used to support the screen. The first driving member is used to drive the second support rod to rotate relative to the first support rod to adjust the angle between the first and second support rods.

[0007] By adopting the above technical solution, the second support rod is driven to rotate relative to the first support rod by the first driving component, thereby adjusting the included angle between the first and second support rods. This allows the first and second support rods to jointly support the curtain and form a stable support structure during the curtain's unfolding process. Compared with existing technologies, the first and second support rods can dynamically construct a stable support structure during curtain release, thus avoiding curtain curling problems caused by excessively long tension paths or uneven force distribution, and effectively improving the flatness and support stability of the curtain.

[0008] Preferably, the inner peripheral wall of the receiving box is provided with a first connecting member, and the end wall of the first connecting member near the open opening is provided with a first pivot portion and a second pivot portion. The first pivot portion and the second pivot portion are spaced apart along a first direction of the receiving box. The end of the first support rod away from the first driving member is provided with a first pivot member. The first pivot member extends between the first pivot portion and the second pivot portion, and the first pivot member is pivotally connected to both the first pivot portion and the second pivot portion.

[0009] By adopting the above technical solution, the first pivot member rotates around the pivot axis between the first pivot part and the second pivot part, so that the first support rod can be turned from a horizontal state to a vertical state, thereby forming a stable support posture when the curtain is fully unfolded. This ensures that the curtain remains flat during the unfolding process and reduces the occurrence of curling.

[0010] Preferably, the housing is provided with a fixing member, which includes a driving part and a locking part. The driving part and the locking part are connected and cooperate. The side wall of the first pivot member is provided with a snap-fit ​​part. When the curtain is fully unfolded, the snap-fit ​​part is opposite to the locking part. The driving part is used to drive the locking part to move closer to or away from the snap-fit ​​part. The first support rod is limited by the snap-fit ​​cooperation between the locking part and the snap-fit ​​part.

[0011] By adopting the above technical solution, the first support rod can be prevented from shifting or rotating through the interlocking of the snap-fit ​​and locking parts, thus preventing the first support rod from being out of vertical position, thereby avoiding the curtain from curling and improving the flatness of the curtain and the user experience.

[0012] Preferably, the first connector has a first limiting part and a second limiting part on the end wall near the opening. The first limiting part and the second limiting part are spaced apart along the first direction of the receiving box, and a limiting gap is formed between the first limiting part and the second limiting part. The snap-fit ​​part is opposite to the limiting gap. When the curtain is fully unfolded, the snap-fit ​​part extends into the limiting gap, and the snap-fit ​​part is limited and engaged with both the first limiting part and the second limiting part.

[0013] By adopting the above technical solution, the locking part is clamped and constrained by the first limiting part and the second limiting part to prevent the locking part from shifting. This prevents the locking part from deviating from the preset position and causing the locking part to be unable to face the locking part. This ensures that the locking part and the locking part are in an accurate relative position and achieves reliable locking and engagement between the two. This improves the stability and locking reliability of the first support rod in the locked state.

[0014] Preferably, the free end of the curtain is provided with a second connector, and the end wall of the second connector near the opening is provided with a third pivot portion and a fourth pivot portion. The third pivot portion and the fourth pivot portion are spaced apart along a first direction of the receiving box. The end of the second support rod away from the first drive member is provided with a second pivot member. The second pivot member extends between the third pivot portion and the fourth pivot portion, and the second pivot member is pivotally connected to both the third pivot portion and the fourth pivot portion.

[0015] By adopting the above technical solution, the second pivot rotates around the pivot axis between the third and fourth pivots. When the second drive adjusts the angle between the second support rod and the first support rod, the second support rod can adjust its angle, thereby maintaining continuous support for the curtain and avoiding uneven curtain tension caused by rigid fixing of the connection parts. This helps to improve the flatness and support coordination of the curtain during the unfolding process.

[0016] Preferably, there are multiple support mechanisms, and the multiple support mechanisms are spaced apart along the second direction of the receiving box.

[0017] By adopting the above technical solution, multiple support mechanisms work together to support the curtain, thereby evenly distributing the force on the curtain in the unfolded state. This prevents the curtain from sagging or curling due to single-point support, thus improving the overall flatness and support stability of the curtain.

[0018] Preferably, the winding assembly includes a second drive member and a winding roller. One end of the winding roller is connected to the second drive member, and the other end is pivotally connected to the receiving box. The fixed end of the curtain is connected to the winding roller. The second drive member is used to drive the winding roller to rotate around the central axis of the winding roller so that the winding roller can wind or release the curtain.

[0019] By adopting the above technical solution, the second driving component drives the winding roller to release or wind the screen, thereby realizing the automatic unfolding and storage of the screen. This avoids uneven unfolding or loose storage of the screen due to manual operation, thereby improving the ease of operation and neatness of storage of the vehicle projection screen.

[0020] Preferably, the vehicle projection screen further includes a distance detection element and a controller. The free end of the screen is provided with a second connector. The distance detection element is located inside the receiving box and opposite to the open opening. When the second connector moves closer to or further away from the receiving box, the distance detection element detects the distance change value of the second connector. The distance detection element and the winding assembly are both communicatively connected to the controller. The controller is used to control the winding assembly to start or stop working according to the detection signal of the distance detection element.

[0021] By adopting the above technical solution, the distance change value of the second connector is detected in real time by the distance detection component. When the distance change value of the second connector is uneven, the controller controls the winding assembly to stop working. This can stop the screen movement in time when the second connector is blocked, avoid the occurrence of hand pinching or jamming, and improve the safety of the vehicle projection screen.

[0022] Preferably, the first driving device is provided with a first current detection device, which is used to detect the input current of the first driving device. The first current detection device is communicatively connected to the controller. When the input current of the first driving device is greater than a first preset current value, the controller controls the first driving device to stop working.

[0023] By adopting the above technical solution, when the input current of the first driving component exceeds the first preset current value due to increased external resistance, the first current detection component sends an abnormal current signal to the controller. The controller controls the first driving component to stop working based on the detection signal of the first current detection component, thereby preventing the first driving component from being overloaded and damaged.

[0024] Preferably, the winding assembly includes a second current detection element, which is used to detect the input current of the winding assembly. The second current detection element is communicatively connected to the controller. When the input current of the winding assembly is greater than a second preset current value, the controller controls the winding assembly to stop working.

[0025] By adopting the above technical solution, when the input current of the second driving component exceeds the second preset current value due to increased external resistance, the second current detection component sends an abnormal current signal to the controller. The controller controls the second driving component to stop working based on the detection signal of the second current detection component, thereby preventing the second driving component from being overloaded and damaged.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. A first driving component drives a second support rod to rotate relative to a first support rod, thereby adjusting the angle between the first and second support rods. This allows the first and second support rods to jointly support the curtain and form a stable support structure during curtain unfolding. Compared to existing technologies, the first and second support rods can dynamically construct a stable support structure during curtain release, thus avoiding curtain curling caused by excessively long tension paths or uneven force distribution, and effectively improving the flatness and support stability of the curtain. 2. Multiple support mechanisms work together to support the curtain, which can evenly distribute the force on the curtain when it is unfolded, and prevent the curtain from sagging or curling due to single-point support, thereby improving the overall flatness and support stability of the curtain. 3. The distance change value of the second connector is detected in real time by the distance detection device. When the distance change value of the second connector is uneven, the controller controls the winding assembly to stop working. This can stop the screen movement in time when the second connector is blocked, avoid the occurrence of hand pinching or jamming, and improve the safety of the vehicle projection screen. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a vehicle projection screen according to an embodiment of this application; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram from another angle of the vehicle projection screen according to an embodiment of this application; Figure 4 yes Figure 3 Enlarged view of point B in the middle; Figure 5 yes Figure 3 Enlarged view of point C in the middle; Figure 6 This is a cross-sectional view of the vehicle projection screen according to an embodiment of this application; Figure 7 yes Figure 6 Enlarged diagram of point D in the middle.

[0028] Explanation of reference numerals in the attached figures: 100. Car projection screen; 1. Receiving box; 11. Receiving space; 12. Opening; 13. First connector; 131. First pivot part; 132. Second pivot part; 133. First limiting part; 134. Second limiting part; 135. Limiting gap; 14. Fixing member; 141. Driving part; 142. Locking part; 2. Curtain mechanism; 21. Winding assembly; 211. Second drive component; 212. Winding roller; 22. Curtain; 221. Second connector; 2211. Third pivot; 2212. Fourth pivot; 3. Support mechanism; 31. First support rod; 311. First pivot member; 312. Snap-fit ​​part; 32. Second support rod; 321. Second pivot member; 33. First driving member; 4. Distance detection component. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0030] This application discloses a vehicle projection screen 100.

[0031] Reference Figure 1 , Figure 3 and Figure 4 The vehicle projection screen 100 according to the embodiments of this application includes: a housing box 1, a screen mechanism 2, and a support mechanism 3.

[0032] The container 1 defines a receiving space 11, and the receiving space 11 forms an opening 12 on the bottom wall of the container 1.

[0033] The screen mechanism 2 is located inside the housing box 1. The screen mechanism 2 includes a winding assembly 21 and a screen 22. The winding assembly 21 is connected and engaged with the fixed end of the screen 22. The free end of the screen 22 is adapted to pass through the opening 12. The winding assembly 21 is used to release or wind the screen 22. Specifically, when the vehicle projection screen 100 is in use, the winding assembly 21 releases the screen 22, and the free end of the screen 22 passes through the opening 12 and moves away from the housing box 1. When the vehicle projection screen 100 is not in use, the winding assembly 21 winds the screen 22, and the free end of the screen 22 passes through the opening 12 and moves closer to the housing box 1 so that the screen 22 is housed inside the housing box 1.

[0034] The support mechanism 3 includes a first support rod 31, a second support rod 32, and a first drive member 33. Along the height direction of the vehicle projection screen 100, the height direction of the vehicle projection screen 100 can be directed... Figure 1 In the vertical direction, the first driving member 33 is located between the first support rod 31 and the second support rod 32. The first driving member 33 is connected and cooperated with both the first support rod 31 and the second support rod 32. The end of the first support rod 31 away from the first driving member 33 extends into the receiving box 1 and is pivotally connected to the inner peripheral wall of the receiving box 1. The end of the second support rod 32 away from the first driving member 33 is pivotally connected to the end of the curtain 22 away from the receiving box 1.

[0035] Specifically, the first support rod 31 is located above the first drive member 33, and the second support rod 32 is located below the first drive member 33. The lower end of the first support rod 31 is connected and engaged with the first drive member 33, the upper end of the first support rod 31 extends into the receiving box 1 and is pivotally connected to the receiving box 1, the upper end of the second support rod 32 is connected and engaged with the first drive member 33, and the lower end of the second support rod 32 is pivotally connected to the free end of the curtain 22.

[0036] It should be noted that when the curtain 22 is in the rolled-up state, the first support rod 31, the second support rod 32 and the first drive member 33 all extend into the receiving box 1 through the opening 12, and the support mechanism 3 is housed in the receiving box 1. When the curtain 22 is in the released state, the first support rod 31, the second support rod 32 and the first drive member 33 all move out of the receiving box 1 through the opening 12.

[0037] In some specific embodiments, the first driving component 33 is a gimbal brushless motor, the first support rod 31 is connected and cooperates with the motor body of the first driving component 33, and the second support rod 32 is connected and cooperates with the output end of the first driving component 33.

[0038] Both the first support rod 31 and the second support rod 32 are used to support the curtain 22. The first driving member 33 is used to drive the second support rod 32 to rotate relative to the first support rod 31, so as to adjust the angle between the first support rod 31 and the second support rod 32.

[0039] Before the curtain 22 is released and unfolded, the first support rod 31, the second support rod 32 and the first drive member 33 are all inside the receiving box 1. The central axis of the first support rod 31 and the central axis of the second support rod 32 are both set horizontally, and the included angle between the central axis of the first support rod 31 and the central axis of the second support rod 32 is 0°.

[0040] When the curtain 22 is released, the winding assembly 21 releases the curtain 22. The free end of the curtain 22 drives the second support rod 32 to move away from the receiving box 1. The second support rod 32 drives the first driving member 33 to move away from the receiving box 1. The first driving member 33 drives the first support rod 31 to move away from the receiving box 1. During the process of the second support rod 32 driving the first driving member 33 to move away from the receiving box 1, the first driving member 33 drives the second support rod 32 to rotate relative to the first support rod 31, so that the first support rod 31 and the second support rod 32 jointly support the curtain 22 and prevent the curtain 22 from curling.

[0041] When the curtain 22 is fully extended, the central axis of the first support rod 31 and the central axis of the second support rod 32 are both vertically aligned, and the angle between the central axes of the first support rod 31 and the second support rod 32 is 180°. It should be noted that when the curtain 22 is released, the first driving member 33 drives the second support rod 32 to rotate relative to the first support rod 31 to different angles according to the unfolded length of the curtain 22. That is, when the unfolded length of the curtain 22 is 1 / 4 of its length, the first driving member 33 drives the second support rod 32 to rotate relative to the first support rod 31 to a first preset angle; when the unfolded length of the curtain 22 is 1 / 2 of its length, the first driving member 33 drives the second support rod 32 to rotate relative to the first support rod 31 to a second preset angle. When the unfolded length of the curtain 22 is 3 / 4 of the length of the curtain 22, the first driving member 33 drives the second support rod 32 to rotate relative to the first support rod 31 to a third preset angle. When the unfolded length of the curtain 22 is equal to the length of the curtain 22, the first driving member 33 drives the second support rod 32 to rotate relative to the first support rod 31 to a fourth preset angle. The first preset angle, the second preset angle, the third preset angle and the fourth preset angle are all different, and the first preset angle, the second preset angle, the third preset angle and the fourth preset angle increase sequentially.

[0042] Therefore, the first driving member 33 drives the second support rod 32 to rotate relative to the first support rod 31, thereby adjusting the included angle between the first support rod 31 and the second support rod 32. This allows the first support rod 31 and the second support rod 32 to jointly support the curtain 22, forming a stable support structure during the unfolding of the curtain 22. Compared with the prior art, the first support rod 31 and the second support rod 32 can dynamically construct a stable support structure during the release of the curtain 22, thereby avoiding the problem of the curtain 22 curling due to excessively long tension paths or uneven force distribution, and thus effectively improving the flatness and support stability of the curtain 22.

[0043] Reference Figures 3-5 In some embodiments of this application, the inner peripheral wall of the receiving box 1 is provided with a first connecting member 13. Specifically, the first connecting member 13 is located on the inner top wall of the receiving box 1. The end wall of the first connecting member 13 near the opening 12 is provided with a first pivot portion 131 and a second pivot portion 132. The first pivot portion 131 and the second pivot portion 132 are spaced apart along a first direction of the receiving box 1. The first direction of the receiving box 1 can refer to... Figure 3 In the front-back direction, the end of the first support rod 31 away from the first drive member 33 is provided with a first pivot member 311. The first pivot member 311 extends between the first pivot part 131 and the second pivot part 132. The first pivot member 311 is pivotally connected to both the first pivot part 131 and the second pivot part 132.

[0044] When the winding assembly 21 releases the curtain 22, the curtain 22 drives the second support rod 32 to move away from the receiving box 1. The second support rod 32 drives the first driving member 33 to move away from the receiving box 1. The first driving member 33 drives the first support rod 31 to move away from the receiving box 1. When the first support rod 31 moves away from the receiving box 1, the first pivot member 311 rotates around the pivot axis between the first pivot part 131 and the second pivot part 132, so that the first support rod 31 gradually rotates from a horizontal state to a vertical state.

[0045] In some specific embodiments, the first fastener passes through the first pivot 131, the first pivot 311, and the second pivot 132 to connect the first pivot 131, the first pivot 311, and the second pivot 132, wherein the first pivot 311 is rotatable about the central axis of the first fastener.

[0046] In some specific embodiments, the first fastener may be a bolt or nut, but this application is not limited thereto; the first fastener may also be a screw.

[0047] By rotating the first pivot member 311 around the pivot axis between the first pivot part 131 and the second pivot part 132, the first support rod 31 can be rotated from a horizontal state to a vertical state, thereby forming a stable support posture when the curtain 22 is fully unfolded. This ensures that the curtain 22 remains flat during unfolding and reduces the occurrence of curling.

[0048] Reference Figures 3-5 In some embodiments of this application, a fixing member 14 is provided inside the housing box 1. Specifically, the fixing member 14 is provided on the inner top wall of the housing box 1. The fixing member 14 includes a driving part 141 and a locking part 142. The driving part 141 and the locking part 142 are connected and cooperate. The side wall of the first pivot member 311 is provided with a snap-fit ​​part 312. When the curtain 22 is fully unfolded, the snap-fit ​​part 312 is opposite to the locking part 142. The driving part 141 is used to drive the locking part 142 to move closer to or away from the snap-fit ​​part 312. The first support rod 31 is limited by the snap-fit ​​cooperation between the locking part 142 and the snap-fit ​​part 312.

[0049] When the winding assembly 21 releases the screen 22, the first pivot 311 rotates about the pivot axis between the first pivot 131 and the second pivot 132, and the locking part 312 rotates about the pivot axis between the first pivot 131 and the second pivot 132 at the same time. When the screen 22 is fully unfolded, the locking part 312 is opposite to the locking part 142, and along the height direction of the vehicle projection screen 100, the locking part 312 is located above the locking part 142. The driving part 141 drives the locking part 142 to move closer to the locking part 312. The locking part 142 abuts against and engages with the lower end wall of the locking part 312, and the first support rod 31 is in a vertical state, thereby realizing the locking and fixing of the current posture of the first support rod 31.

[0050] By engaging the snap-fit ​​part 312 and the locking part 142, the first support rod 31 can be prevented from shifting or rotating, thereby preventing the first support rod 31 from not being in a vertical position, thus preventing the curtain 22 from curling and improving the flatness of the curtain 22 and the user experience.

[0051] In some specific embodiments, the fixing member 14 is preferably a miniature electromagnetic lock.

[0052] Reference Figures 3-5 In some embodiments of this application, the first connector 13 is provided with a first limiting part 133 and a second limiting part 134 on the end wall near the opening 12. The first limiting part 133 and the second limiting part 134 are spaced apart along the first direction of the receiving box 1, and a limiting gap 135 is formed between the first limiting part 133 and the second limiting part 134. The snap-fit ​​part 312 is opposite to the limiting gap 135. Specifically, the first limiting part 133 is located in front of the snap-fit ​​part 312, and the second limiting part 134 is located behind the snap-fit ​​part 312. When the curtain 22 is fully unfolded, the snap-fit ​​part 312 extends into the limiting gap 135, and the snap-fit ​​part 312 is limited and engaged with the first limiting part 133 and the second limiting part 134.

[0053] When the curtain 22 is fully unfolded, the locking part 312 extends between the first limiting part 133 and the second limiting part 134. The locking part 312 is clamped and constrained by the first limiting part 133 and the second limiting part 134 to prevent the locking part 312 from shifting. This prevents the locking part 312 from deviating from the preset position and causing the locking part 312 to be unable to face the locking part 142. This ensures that the locking part 312 and the locking part 142 are in an accurate relative position, achieving reliable locking and engagement between the two. This improves the stability and locking reliability of the first support rod 31 in the locked state.

[0054] Reference Figure 1 and Figure 2 In some embodiments of this application, the free end of the curtain 22 is provided with a second connector 221. The end wall of the second connector 221 near the opening 12 is provided with a third pivot portion 2211 and a fourth pivot portion 2212. The third pivot portion 2211 and the fourth pivot portion 2212 are spaced apart along the first direction of the receiving box 1. The end of the second support rod 32 away from the first drive member 33 is provided with a second pivot member 321. The second pivot member 321 extends between the third pivot portion 2211 and the fourth pivot portion 2212. The second pivot member 321 is pivotally connected to both the third pivot portion 2211 and the fourth pivot portion 2212.

[0055] When the winding assembly 21 releases the curtain 22, the free end of the curtain 22 moves away from the receiving box 1. The curtain 22 drives the second support rod 32 to move away from the receiving box 1. When the second support rod 32 moves away from the receiving box 1, the second pivot member 321 rotates around the pivot axis between the third pivot part 2211 and the fourth pivot part 2212, so that the second support rod 32 maintains a rotatable connection state during the position change relative to the free end of the curtain 22. This allows the second support rod 32 to cooperate with the first drive member 33 to adjust the angle between the second support rod 32 and the first support rod 31 during the movement, thereby achieving continuous support for the curtain 22.

[0056] In some specific embodiments, the second fastener passes through the third pivot 2211, the second pivot 321, and the fourth pivot 2212 to connect the third pivot 2211, the second pivot 321, and the fourth pivot 2212, and the second pivot 321 is rotatable about the central axis of the second fastener.

[0057] In some specific embodiments, the second fastener can be a bolt and a nut, but this application is not limited to this, and the second fastener can also be a screw.

[0058] By rotating the second pivot 321 around the pivot axis between the third pivot 2211 and the fourth pivot 2212, the second support rod 32 can adjust its angle when the second drive member 211 adjusts the angle between the second support rod 32 and the first support rod 31. This allows for continuous support of the curtain 22, avoiding uneven tension of the curtain 22 caused by rigid fixing of the connection parts. This, in turn, helps improve the flatness and support coordination of the curtain 22 during the unfolding process.

[0059] Reference Figure 1 In some embodiments of this application, there are multiple support mechanisms 3, which are spaced apart along the second direction of the receiving box 1. The second direction of the receiving box 1 can refer to... Figure 3 The left and right directions in the middle.

[0060] Along the second direction of the housing box 1, multiple support mechanisms 3 jointly support the curtain 22, thereby evenly distributing the force on the curtain 22 in the unfolded state, preventing the curtain 22 from sagging or curling locally due to single-point support, and thus improving the overall flatness and support stability of the curtain 22.

[0061] Reference Figure 1 , Figure 6 and Figure 7In some embodiments of this application, the winding assembly 21 includes a second drive member 211 and a winding roller 212. One end of the winding roller 212 is connected to the second drive member 211, and the other end of the winding roller 212 is pivotally connected to the receiving box 1. The fixed end of the curtain 22 is connected to the winding roller 212. The second drive member 211 is used to drive the winding roller 212 to rotate around the central axis of the winding roller 212 so that the winding roller 212 winds or releases the curtain 22.

[0062] In some specific embodiments, the second driving element 211 is preferably a motor.

[0063] The second driving member 211 drives the winding roller 212 to rotate around the central axis of the winding roller 212, so that the winding roller 212 releases or winds the curtain 22. In some specific embodiments, when the second driving member 211 rotates clockwise, the winding roller 212 releases the curtain 22, and when the second driving member 211 rotates counterclockwise, the winding roller 212 winds the curtain 22, thereby achieving the technical effect of unfolding or storing the curtain 22.

[0064] The second driving component 211 drives the winding roller 212 to release or wind the screen 22, thereby enabling the automatic unfolding and storage of the screen 22. This avoids uneven unfolding or loose storage of the screen 22 due to manual operation, thereby improving the ease of operation and neatness of storage of the vehicle projection screen 100.

[0065] Reference Figure 6 In some specific embodiments, there can be two second driving members 211. Along the axial direction of the winding roller 212, one second driving member 211 is disposed at one end of the winding roller 212, and the other second driving member 211 is disposed at the other end of the winding roller 212. When the winding roller 212 winds the screen 22, the two second driving members 211 jointly drive the winding roller 212 to rotate. The torque of the winding roller 212 winding the screen 22 is jointly output by the two second driving members 211, thereby reducing the output torque of a single second driving member 211, reducing the rotational speed of a single second driving member 211, thereby reducing the vibration amplitude of a single second driving member 211, and reducing the noise of the winding roller 212 winding the screen 22, thus improving the user experience of the vehicle projection screen 100.

[0066] Reference Figure 1 and Figure 3In some embodiments of this application, the vehicle projection screen 100 further includes a distance detection element 4 and a controller. The distance detection element 4 is disposed inside the housing 1 and opposite to the opening 12. When the second connector 221 moves closer to or further away from the housing 1, the distance detection element 4 detects the distance change value of the second connector 221. That is, when the winding assembly 21 releases or winds the screen 22, the distance detection element 4 detects the distance change value of the second connector 221. The distance detection element 4 and the winding assembly 21 are both communicatively connected to the controller. The controller is used to control the winding assembly 21 to start or stop working according to the detection signal of the distance detection element 4.

[0067] In some specific embodiments, the distance detection element 4 is preferably a laser TOF sensor.

[0068] During the process of the winding assembly 21 releasing or winding the curtain 22, the distance detection element 4 detects the distance change value of the second connector 221 in real time. The controller determines whether the movement distance of the second connector 221 is the same in multiple preset time periods based on the detection signal of the distance detection element 4. In other words, the controller determines whether the distance change value of the second connector 221 is uniform based on the detection signal of the distance detection element 4. When the distance change value of the second connector 221 is not uniform, that is, the second connector 221 is blocked by an obstacle, the controller controls the winding assembly 21 to stop working.

[0069] In some specific embodiments, the preset time period can be 1 second or 2 seconds.

[0070] In some specific embodiments, the obstacle can be a hand, thereby enabling the vehicle projection screen 100 to have an anti-pinch function.

[0071] The distance change value of the second connector 221 is detected in real time by the distance detection component 4. When the distance change value of the second connector 221 is uneven, the controller controls the winding component 21 to stop working. This can stop the movement of the screen 22 in time when the second connector 221 is blocked, avoid the occurrence of hand pinching or jamming, and improve the safety of the vehicle projection screen 100.

[0072] In some embodiments of this application, the first driving unit 33 is provided with a first current detection element. The first current detection element is used to detect the input current of the first driving unit 33. The first current detection element is communicatively connected to the controller. When the input current of the first driving unit 33 is greater than a first preset current value, the controller controls the first driving unit 33 to stop working.

[0073] When the input current of the first drive unit 33 exceeds the first preset current value due to increased external resistance, the first current detection unit sends an abnormal current signal to the controller. The controller controls the first drive unit 33 to stop working based on the detection signal of the first current detection unit, thereby preventing the first drive unit 33 from being overloaded and damaged.

[0074] In some specific embodiments, when a person pulls or blocks the curtain 22 with their hand, the first driving member 33 drives the second support rod 32 to rotate, and the external resistance to the first driving member 33 increases, causing the input current to be greater than the first preset current value.

[0075] In some specific embodiments, the first current detection element may be a Hall current sensor.

[0076] In some embodiments of this application, the winding assembly 21 includes a second current detection element. Specifically, the second drive unit 211 is provided with a second current detection element. The second current detection element is used to detect the input current of the winding assembly 21. The second current detection element is communicatively connected to the controller. When the input current of the winding assembly 21 is greater than a second preset current value, the controller controls the winding assembly 21 to stop working.

[0077] When the input current of the second drive unit 211 exceeds the second preset current value due to increased external resistance, the second current detection unit sends an abnormal current signal to the controller. The controller controls the second drive unit 211 to stop working based on the detection signal of the second current detection unit, thereby preventing the second drive unit 211 from being overloaded and damaged.

[0078] In some specific embodiments, when a person pulls or blocks the curtain 22 with their hand, the second drive member 211 drives the winding roller 212 to release or wind the curtain 22. The increased external resistance experienced by the second drive member 211 causes the input current to be greater than the second preset current value.

[0079] In some specific embodiments, the second current detection element can be a Hall current sensor.

[0080] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A vehicle projection screen, characterized in that, include: A receiving box (1) defines a receiving space (11), the receiving space (11) forming an opening (12) in the bottom wall of the receiving box (1); A curtain mechanism (2) is provided inside the receiving box (1). The curtain mechanism (2) includes a winding assembly (21) and a curtain (22). The winding assembly (21) is connected to the fixed end of the curtain (22). The free end of the curtain (22) is adapted to pass through the opening (12). The winding assembly (21) is used to release or wind the curtain (22). The support mechanism (3) includes a first support rod (31), a second support rod (32), and a first drive member (33). Along the height direction of the vehicle projection screen (100), the first drive member (33) is located between the first support rod (31) and the second support rod (32). The first drive member (33) is connected and cooperates with both the first support rod (31) and the second support rod (32). The end of the first support rod (31) away from the first drive member (33) extends into the receiving box (1). The second support rod (32) is pivotally connected to the inner peripheral wall of the receiving box (1), and the end of the second support rod (32) away from the first drive member (33) is pivotally connected to the end of the curtain (22) away from the receiving box (1). The first support rod (31) and the second support rod (32) are both used to support the curtain (22). The first drive member (33) is used to drive the second support rod (32) to rotate relative to the first support rod (31) to adjust the angle between the first support rod (31) and the second support rod (32).

2. The vehicle projection screen according to claim 1, characterized in that, The inner peripheral wall of the receiving box (1) is provided with a first connector (13). The first connector (13) has a first pivot part (131) and a second pivot part (132) on the end wall near the opening (12). The first pivot part (131) and the second pivot part (132) are spaced apart along a first direction of the receiving box (1). The end of the first support rod (31) away from the first drive member (33) is provided with a first pivot part (311). The first pivot part (311) extends between the first pivot part (131) and the second pivot part (132). The first pivot part (311) is pivotally connected to both the first pivot part (131) and the second pivot part (132).

3. A vehicle projection screen according to claim 2, characterized in that, The housing (1) is provided with a fixing member (14), which includes a driving part (141) and a locking part (142). The driving part (141) and the locking part (142) are connected and cooperate. The side wall of the first pivot (311) is provided with a snap-fit ​​part (312). When the curtain (22) is fully unfolded, the snap-fit ​​part (312) is opposite to the locking part (142). The driving part (141) is used to drive the locking part (142) to move closer to or away from the snap-fit ​​part (312). The first support rod (31) is limited by the snap-fit ​​cooperation between the locking part (142) and the snap-fit ​​part (312).

4. A vehicle projection screen according to claim 3, characterized in that, The first connector (13) has a first limiting part (133) and a second limiting part (134) on the end wall near the opening (12). The first limiting part (133) and the second limiting part (134) are spaced apart along the first direction of the receiving box (1). A limiting gap (135) is formed between the first limiting part (133) and the second limiting part (134). The snap-fit ​​part (312) is opposite to the limiting gap (135). When the curtain (22) is fully unfolded, the snap-fit ​​part (312) extends into the limiting gap (135). The snap-fit ​​part (312) is limited and engaged with both the first limiting part (133) and the second limiting part (134).

5. A vehicle projection screen according to claim 1, characterized in that, The free end of the curtain (22) is provided with a second connector (221). The second connector (221) has a third pivot (2211) and a fourth pivot (2212) on the end wall near the opening (12). The third pivot (2211) and the fourth pivot (2212) are spaced apart along the first direction of the receiving box (1). The end of the second support rod (32) away from the first drive member (33) is provided with a second pivot (321). The second pivot (321) extends between the third pivot (2211) and the fourth pivot (2212). The second pivot (321) is pivotally connected to both the third pivot (2211) and the fourth pivot (2212).

6. A vehicle projection screen according to claim 1, characterized in that, There are multiple support mechanisms (3), and the multiple support mechanisms (3) are spaced apart along the second direction of the receiving box (1).

7. A vehicle projection screen according to claim 1, characterized in that, The winding assembly (21) includes a second drive member (211) and a winding roller (212). One end of the winding roller (212) is connected to the second drive member (211), and the other end is pivotally connected to the receiving box (1). The fixed end of the curtain (22) is connected to the winding roller (212). The second drive member (211) is used to drive the winding roller (212) to rotate around the central axis of the winding roller (212) so that the winding roller (212) winds or releases the curtain (22).

8. A vehicle projection screen according to claim 1, characterized in that, Also includes: The curtain (22) has a second connector (221) at its free end. The distance detection element (4) is located inside the receiving box (1) and opposite to the opening (12). When the second connector (221) moves closer to or further away from the receiving box (1), the distance detection element (4) detects the distance change value of the second connector (221). The distance detection element (4) and the winding assembly (21) are both communicatively connected to the controller. The controller is used to control the winding assembly (21) to start or stop working according to the detection signal of the distance detection element (4).

9. A vehicle projection screen according to claim 8, characterized in that, The first driving unit (33) is provided with a first current detection unit. The first current detection unit is used to detect the input current of the first driving unit (33). The first current detection unit is communicatively connected to the controller. When the input current of the first driving unit (33) is greater than a first preset current value, the controller controls the first driving unit (33) to stop working.

10. A vehicle projection screen according to claim 8, characterized in that, The winding assembly (21) includes a second current detection element, which is used to detect the input current of the winding assembly (21). The second current detection element is communicatively connected to the controller. When the input current of the winding assembly (21) is greater than a second preset current value, the controller controls the winding assembly (21) to stop working.

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