Curved mirror assembly, projection device, head-up display system and vehicle

Abstract

The utility model provides a curved mirror assembly, a projection device, a head-up display system and a vehicle. The curved mirror assembly comprises a curved mirror, a support and a connecting piece. In the first direction, the size of the curved mirror is L, and the first direction is the long edge direction of the curved mirror. The support comprises a support body, a first rotating shaft and a second rotating shaft, and the first rotating shaft and the second rotating shaft are connected to the two opposite sides of the support body in the first direction. The connecting piece comprises a first connecting part and a second connecting part, the first connecting part and the second connecting part are both connected between the support and the curved mirror, the first connecting part and the second connecting part are connected to the middle area of the curved mirror, and the first connecting part and the second connecting part are arranged in a spaced mode in the first direction; the distance between the first connecting part and the second connecting part ranges from 1 / 4L to 1 / 2L. According to the embodiment of the invention, the connection mode of the curved mirror and the bracket can be adjusted, and the influence of deformation of the curved mirror on the propagation path of light is avoided.

Description

Technical Field

[0001] The present application relates to the field of curved mirror installation, and in particular to a curved mirror assembly, a projection device, a head-up display system and a vehicle. Background Art

[0002] At present, in the head-up display system, the curved mirror needs to be fixed on a bracket, and then fixed in the vehicle and other equipment. Since the stress point at the connection between the curved mirror and the bracket is relatively concentrated, the curved mirror may be slightly deformed, which in turn causes the curved mirror to reflect light and deviate from the optical path, resulting in unclear head-up display images, which brings a bad user experience. Utility Model Content

[0003] The embodiments of the present application provide a curved mirror assembly, a projection device, a head-up display system and a vehicle, which can adjust the connection method between the curved mirror and the bracket to prevent the curved mirror from deforming and affecting the propagation path of light.

[0004] In a first aspect, the present application provides a curved mirror assembly that can be rotatably connected to a housing of a projection device, the curved mirror assembly comprising a curved mirror, a bracket and a connector. Along a first direction, the size of the curved mirror is L, wherein the first direction is the long side direction of the curved mirror. The bracket comprises a bracket body, a first rotating shaft and a second rotating shaft, along the first direction, the first rotating shaft and the second rotating shaft are connected to opposite sides of the bracket body, the bracket body and the curved mirror are stacked, and the first rotating shaft and the second rotating shaft are rotatably connected to the housing. The connector comprises a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are both connected between the bracket and the curved mirror, the first connecting portion and the second connecting portion are connected to the middle area of ​​the curved mirror, along the first direction, the first connecting portion and the second connecting portion are spaced apart, and the distance between the first connecting portion and the second connecting portion ranges from 1 / 4L to 1 / 2L.

[0005] In this embodiment, the connecting member can stably connect the bracket to the curved mirror. The first connecting portion and the second connecting portion can jointly share the stress at the connection between the curved mirror and the bracket, thereby preventing the connection of the curved mirror from being slightly deformed due to excessive stress, and preventing the reflection light path of the curved mirror from being changed to cause imaging distortion.

[0006] In addition, the bracket of the curved mirror assembly is generally made of plastic or metal, and the curved mirror is generally made of glass. The thermal expansion coefficient of the bracket is quite different from that of the curved mirror. Under extreme temperature conditions, the bracket of the curved mirror assembly and the curved mirror will expand and contract to varying degrees, causing the position of the connection point of the bracket and the position of the connection point of the curved mirror to change to varying degrees, causing the bracket to pull the curved mirror to deform. When the stress between the bracket and the curved mirror exceeds a certain value, the curved mirror will deform or break.

[0007] The connector can act as a buffer between the bracket and the curved mirror, solving the problem of mismatched thermal expansion coefficients between the bracket and the curved mirror, and avoiding large deformation between the bracket and the curved mirror, which may cause large deformation or cracking of the curved mirror. The curved mirror structure that is not easy to break can withstand greater external forces and impacts, thereby extending the overall service life of the head-up display system. The stable curved mirror structure reduces the frequency of replacement due to breakage, thereby reducing maintenance costs. The stable curved mirror structure can ensure the clarity and accuracy of the projected information, provide the driver with more intuitive and easy-to-read driving information, and enhance the driving experience.

[0008] In a possible implementation, the first connection portion includes at least two connection colloids, and along the second direction, the at least two connection colloids of the first connection portion are arranged at intervals, wherein the second direction is the wide side direction of the curved mirror. The second connection portion includes at least two connection colloids, and along the second direction, the at least two connection colloids of the second connection portion are arranged at intervals.

[0009] In this embodiment, the first connection part is divided into a plurality of small colloid (connecting colloid) connection parts, and the second connection part is divided into a plurality of small colloid (connecting colloid) connection parts, so that the connection positions of the curved mirror and the bracket are more dispersed. The dispersion of the connection points between the curved mirror and the bracket can more effectively disperse the weight and force borne by the curved mirror, so that the bracket can better support the curved mirror and reduce the risk of deformation or damage caused by excessive force at a single point. This dispersed support method helps to maintain the stability of the curved mirror, especially when subjected to external force or vibration, it can reduce the shaking of the curved mirror and improve the overall stability.

[0010] Since the connection points between the curved mirror and the bracket are dispersed, the force borne by each connection point is relatively small, which helps to extend the service life of the connection parts. Compared with single-point connection, the dispersed connection points are more resistant to long-term stress concentration and fatigue damage, thereby improving the durability of the connection between the curved mirror and the bracket.

[0011] In a possible embodiment, the bracket body is provided with a first connecting protrusion and a second connecting protrusion, in a first direction, the first connecting protrusion and the second connecting protrusion are arranged at an interval, the bracket body has a center line, the center line extends along the second direction, and the first connecting protrusion and the second connecting protrusion are symmetrical about the center line. The first connecting portion is connected to the first connecting protrusion, and the second connecting portion is connected to the second connecting protrusion.

[0012] In this embodiment, in order to avoid the glue point connection area between the bracket body and the curved mirror being too large, a connecting protrusion can be provided. When the colloid is squeezed by the bracket body and the curved mirror, excess colloid can flow under the connecting protrusion, thereby avoiding the glue point area being too large, which may cause excessive stress concentration at the connection position between the bracket body and the curved mirror.

[0013] In a possible implementation, the number of the first connection protrusions is at least three, at least three first connection protrusions are arranged at intervals along the second direction, the first connection portion includes at least three connection colloids, and one connection colloid of one first connection portion is connected to one first connection protrusion. The number of the second connection protrusions is at least three, at least three second connection protrusions are arranged at intervals along the second direction, the second connection portion includes at least three connection colloids, and one connection colloid of one second connection portion is connected to one second connection protrusion.

[0014] In a possible implementation, the curved mirror assembly further includes a first elastic portion and a second elastic portion, one end of the bracket in the long side direction is connected to the first elastic portion, and the other end is connected to the second elastic portion. The first elastic portion and the second elastic portion are both located between the bracket and the curved mirror, the first elastic portion is located on a side of the first connection portion away from the second connection portion, the first elastic portion is spaced apart from the first connection portion, the second elastic portion is located on a side of the second connection portion away from the first connection portion, and the second elastic portion is spaced apart from the second connection portion.

[0015] In this embodiment, since the length of the curved mirror is relatively large, the ends of the curved mirror in the length direction may hit the support body when vibrating or impacted. The first elastic part and the second elastic part can prevent the two ends of the curved mirror from hard contact with the support body, thereby preventing the curved mirror from breaking after hitting the support body.

[0016] In a possible implementation manner, the number of the first elastic parts is two, the number of the second elastic parts is two, and along the second direction, the two first elastic parts are arranged at intervals, and the two second elastic parts are arranged at intervals.

[0017] In this embodiment, the two first elastic parts can be located between the top corners of one side of the curved mirror and the bracket. The two second elastic parts can be located between the top corners of the other side of the curved mirror and the bracket. The four elastic bodies can prevent the four top corners of the curved mirror from making hard contact with the bracket, and prevent the curved mirror from breaking after hitting the bracket.

[0018] In a possible implementation, the curved mirror assembly further includes a third elastic portion and a fourth elastic portion, the third elastic portion and the fourth elastic portion are located between the first elastic portion and the second elastic portion, and the third elastic portion and the fourth elastic portion are spaced apart.

[0019] In this embodiment, the third elastic part and the fourth elastic part can maintain a certain distance between the bracket body and the curved mirror, so as to prevent the colloid from being flattened and losing the bonding strength, and to prevent the curved mirror from being in hard contact with the bracket and causing local bulging.

[0020] In a possible implementation, the bracket further includes a frame, which is disposed around the periphery of the bracket body. Along a first direction, the first rotating shaft and the second rotating shaft are connected to opposite sides of the frame, and the frame is disposed around the curved mirror.

[0021] In this embodiment, the frame of the bracket can effectively prevent the curved mirror from being directly impacted by external forces, reducing the risk of damage. The frame not only protects the curved mirror, but also plays a role in fixing and supporting, ensuring that the curved mirror can be stably installed in the desired position.

[0022] In a possible implementation, the frame includes a fixed frame and an elastic arm, the fixed frame is fixedly connected to the edge of the bracket body, the fixed frame is connected to the periphery of the bracket body, and the fixed frame is arranged around the curved mirror. The bracket is provided with an avoidance opening, and the avoidance opening passes through the fixed frame and the bracket body along the thickness direction of the bracket, the elastic arm is located in the avoidance opening, one end of the elastic arm is connected to the fixed frame, and there is a gap between the elastic arm and the bracket body.

[0023] In this embodiment, the elastic arm structure can bend in the direction away from the bracket body, so that after the curved mirror is connected to the bracket, the contact area between the periphery of the curved mirror and the edge of the bracket is reduced, thereby reducing the abutment force of the frame of the bracket on the edge of the curved mirror, thereby avoiding the periphery of the curved mirror and the frame from hard contact and causing breakage or deformation.

[0024] Since the elastic arm can reduce the force exerted by the frame of the bracket on the curved mirror, during the manual assembly of the curved mirror and the bracket, the elastic arm can also provide a certain degree of tolerance for manual operation, thereby improving the installation yield of the curved mirror and the bracket and preventing the frame from exerting excessive force on the curved mirror, causing the curved mirror to break.

[0025] In a possible implementation, the elastic arm includes a connecting arm and a limiting block, one end of the connecting arm is connected to the fixing frame, and the other end is connected to the limiting block, and the limiting block is protruding from the surface of the connecting arm facing the bracket body.

[0026] In a second aspect, the present application also provides a projection device, including an optical engine, a shell and the curved mirror assembly as described above, wherein the first rotating shaft and the second rotating shaft of the curved mirror assembly are rotatably connected to the shell, and the optical engine is used to emit light to the curved mirror, and the light can be reflected on the surface of the curved mirror.

[0027] In a third aspect, the present application also provides a head-up display system, which includes an imaging device and the projection device as described above, and the imaging device can receive light emitted by the projection device to present an image.

[0028] In a fourth aspect, the present application also provides a vehicle, comprising a vehicle body and the head-up display system as described above, wherein the head-up display system is installed in the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained like these drawings without paying any creative work.

[0030] Figure 1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0031] Figure 2 yes Figure 1 A schematic structural diagram of a curved mirror assembly of a projection device shown;

[0032] Figure 3 yes Figure 2 An exploded schematic diagram of the curved mirror assembly shown;

[0033] Figure 4 yes Figure 3 A schematic structural diagram of an angle of the bracket shown;

[0034] Figure 5 yes Figure 4 A schematic structural diagram of the bracket at another angle shown;

[0035] Figure 6 yes Figure 4 A schematic diagram of the structure of the bracket, the connecting member and the elastic member assembled as shown;

[0036] Figure 7 yes Figure 4 An enlarged schematic diagram of part A of the scaffold is shown. DETAILED DESCRIPTION

[0037] The specific embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can also be implemented in other ways different from those described herein, and therefore, the present application is not limited to the following embodiments.

[0038] For ease of understanding, the terms involved in the embodiments of the present application are first explained.

[0039] Multiple: refers to two or more than two.

[0040] Connection: should be understood in a broad sense. For example, A and B are connected, which can be either direct or indirect through an intermediary.

[0041] The specific implementation of the present application will be clearly described below in conjunction with the accompanying drawings.

[0042] See also Figure 1 , Figure 1 1 is a schematic diagram of the structure of a vehicle 100 provided in an embodiment of the present application. The vehicle 100 includes a vehicle body 10 and a head-up display system 20. The head-up display system 20 is installed in the vehicle body 10.

[0043] It should be noted that Figure 1 The purpose is only to schematically describe the connection relationship between the vehicle body 10 and the head-up display system 20, and it does not specifically limit the connection position, specific structure and quantity of each device. The structure illustrated in the embodiment of the present application does not constitute a specific limitation on the vehicle 100. In other embodiments of the present application, the vehicle 100 may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently. The illustrated components can be implemented in hardware, software, or a combination of software and hardware.

[0044] The head-up display system 20 includes an imaging device 21 and a projection device 22 . The imaging device 21 can receive light emitted by the projection device 22 to present an image.

[0045] In this embodiment, the head-up display system 20 can directly project important information such as vehicle speed, rotation speed, fuel level, gear position, navigation instructions, traffic information, road speed limit and / or driver assistance system status (such as lane departure warning, adaptive cruise control) onto the windshield in front of the driver. In this way, the driver can obtain this information in real time without lowering his head to check the instrument panel or diverting his eyes, thereby improving driving safety and convenience.

[0046] The projection device 22 can project the information to be displayed (such as vehicle speed, navigation instructions, etc.) onto the imaging device 21 in the form of an image. Specifically, the projection device 22 converts the information into a visible image through a series of optical means (such as an image generator forms an image, and then performs optical magnification, zooming, etc.) and projects it onto the windshield or a specific position in front of the driver. In this way, the driver can directly see the required information without lowering his head to check the dashboard or shifting his sight.

[0047] The imaging device 21 serves as a carrier of the projected image, and clearly presents the image projected by the projection device 22. The imaging device 21 can be the windshield itself, or a piece of transparent resin glass in front of the driver.

[0048] The projection device 22 includes an optical engine (not shown), a housing (not shown) and a curved mirror assembly (not shown). The curved mirror assembly is rotatably connected to the housing, and the optical engine is used to emit light to the curved mirror, and the light can be reflected on the surface of the curved mirror.

[0049] The curved mirror assembly is located on the optical path of the optical machine and is used to reflect the image light generated by the optical machine. Through the reflection of the curved mirror assembly, the image light forms an optical path along a specific angle, and is thus projected onto the imaging device 21. The design of the curved mirror assembly enables the light to propagate along a predetermined path, ensuring that the image can be accurately presented within the driver's field of vision.

[0050] At present, in the head-up display system, the curved mirror needs to be fixed on a bracket, and then fixed in the vehicle and other equipment. Since the stress point at the connection between the curved mirror and the bracket is relatively concentrated, the curved mirror may be slightly deformed, which in turn causes the curved mirror to reflect light and deviate from the optical path, resulting in unclear head-up display images, which brings a bad user experience.

[0051] Based on this, see Figure 2 and Figure 3 , Figure 2 yes Figure 1 The structure diagram of the curved mirror assembly 220 of the projection device 22 is shown. Figure 3 yes Figure 2 The exploded schematic diagram of the curved mirror assembly 220 is shown. The curved mirror assembly 220 provided in the embodiment of the present application can adjust the connection mode between the curved mirror 221 and the bracket 222 to prevent the curved mirror 221 from deforming and affecting the propagation path of the light.

[0052] The curved mirror assembly 220 includes a curved mirror 221, a bracket 222, a connecting member 223 and an elastic member 224. The curved mirror 221 and the bracket 222 are stacked. The connecting member 223 and the elastic member 224 are connected between the curved mirror 221 and the bracket 222.

[0053] Specifically, the curved mirror 221 can adjust the propagation path of the image light through its specific curved shape to ensure that the light can be projected onto the imaging device 21 in a predetermined direction. The curved mirror 221 can also magnify the image generated by the optical machine, so that the driver can clearly see the required information at a farther distance. The length of the curved mirror 221 is L.

[0054] In addition, since the imaging device 21 such as the windshield may have a certain curvature, this may cause the image to be distorted during the projection process. The design of the curved mirror 221 can compensate for this distortion, ensuring that the image finally presented to the driver is clear and accurate.

[0055] It should be noted that the projection device generally includes two curved mirrors. One of the curved mirrors has a smaller area, and the other curved mirror has a larger area. The larger curved mirror is more likely to deform. Therefore, the connection method between the bracket 222 and the curved mirror 221 in the curved mirror assembly 220 provided in the embodiment of the present application can be applicable to the connection method between the larger curved mirror 221 and the bracket 222 in the projection device 22. Exemplarily, the length of the curved mirror 221 provided in the embodiment of the present application can be greater than or equal to 340 mm, and the width of the curved mirror 221 can be greater than or equal to 140 mm.

[0056] See also Figure 4 , Figure 4 yes Figure 3 The bracket 222 is a schematic structural diagram at an angle. The bracket 222 includes a bracket body 225, a frame 226, a first rotating shaft 227, a second rotating shaft 228 and a tow bar 229.

[0057] The support body 225 may be an arc-shaped plate. The support body 225 includes a first surface 2251 and a second surface 2252. Along the thickness direction of the support body 225, the first surface 2251 and the second surface 2252 are arranged opposite to each other. The first surface 2251 faces the curved mirror 221. The second surface 2252 faces away from the curved mirror 221.

[0058] The first surface 2251 includes a middle area 2253, a first edge area 2254, and a second edge area 2255. The middle area 2253 is located in the middle of the first surface 2251. The center of the middle area 2253 may be a symmetric center. In this embodiment, the middle area 2253 is also the area where the top of the curved mirror 221 of the arc surface is located. The first edge area 2254 is located at one end of the long side direction of the first surface 2251. The second edge area 2255 is located at the other end of the long side direction of the first surface 2251. Along the first direction, the first edge area 2254, the middle area 2253, and the second edge area 2255 are arranged in sequence.

[0059] The bracket body 225 may be provided with a first glue overflow groove 2291 , a second glue overflow groove 2292 , a first limiting groove 2293 , a second limiting groove 2294 , a third limiting groove 2295 and a fourth limiting groove 2296 .

[0060] The first glue overflow groove 2291 and the second glue overflow groove 2292 are both recessed by the first surface 2251. The first glue overflow groove 2291 and the second glue overflow groove 2292 are both annular grooves. A first connecting protrusion 2297 is provided at the center of a first glue overflow groove 2291. A second connecting protrusion 2298 is provided at the center of a second glue overflow groove 2292. The first connecting protrusion 2297 and the second connecting protrusion 2298 are symmetrical about the center line of the bracket body 225. The inner diameter d of the first glue overflow groove 2291 and the second glue overflow groove 2292 can be less than or equal to 16mm. The first glue overflow groove 2291 and the second glue overflow groove 2292 are both located in the middle area 2253. The first glue overflow groove 2291 and the second glue overflow groove 2292 are spaced apart in the first direction. Exemplarily, the first glue overflow groove 2291 and the second glue overflow groove 2292 can be symmetrically arranged along the center line of the bracket body 225. Wherein, the center line is parallel to the wide side direction of the bracket body 225.

[0061] In some possible implementations, the number of the first glue overflow grooves 2291 is at least three. The three first glue overflow grooves 2291 are arranged at intervals along the second direction. The number of the second glue overflow grooves 2292 is at least three. The three second glue overflow grooves 2292 are arranged at intervals along the second direction.

[0062] The first limiting groove 2293 is located in the first edge region 2254. The first limiting groove 2293 may be a square groove. The number of the first limiting grooves 2293 may be two. The two first limiting grooves 2293 may be arranged at intervals along the second direction. The two first limiting grooves 2293 may be located at two vertex positions of the bracket body 225 in the first edge region 2254, respectively.

[0063] The second limiting groove 2294 is located in the second edge region 2255. The second limiting groove 2294 may be a square groove. The number of the second limiting grooves 2294 may be two. The two second limiting grooves 2294 may be arranged at intervals along the second direction. The two second limiting grooves 2294 may be located at two vertex positions of the bracket body 225 in the second edge region 2255, respectively.

[0064] The third limiting groove 2295 is located between the first edge area 2254 and the middle area 2253. The third limiting groove 2295 can be a square groove. The number of the third limiting grooves 2295 can be two. The two third limiting grooves 2295 can be arranged at intervals along the second direction. The two third limiting grooves 2295 can be arranged close to the long sides of the two bracket bodies 225 respectively. The distance between the third limiting groove 2295 and the long side of the bracket body 225 is less than the distance between the first overflow glue groove 2291 and the long side of the bracket body 225. Exemplarily, one third limiting groove 2295 can be connected to one first overflow glue groove 2291.

[0065] The fourth limiting groove 2296 is located between the second edge area 2255 and the middle area 2253. The fourth limiting groove 2296 can be a square groove. The number of the fourth limiting groove 2296 can be two. The two fourth limiting grooves 2296 can be arranged at intervals along the second direction. The two fourth limiting grooves 2296 can be arranged close to the long sides of the two bracket bodies 225 respectively. The distance between the fourth limiting groove 2296 and the long side of the bracket body 225 is less than the distance between the second overflow glue groove 2292 and the long side of the bracket body 225. Exemplarily, one fourth limiting groove 2296 can be connected to one second overflow glue groove 2292.

[0066] See also Figure 5 , Figure 5 yes Figure 4 2 is a schematic structural diagram of another angle of the bracket 222. The second surface 2252 of the bracket body 225 is further provided with reinforcing ribs 2256. Exemplarily, the reinforcing ribs 2256 can be laid on the second surface 2252 in a mesh shape.

[0067] In this embodiment, the provision of the reinforcing ribs 2256 can significantly improve the anti-deformation capability of the bracket body 225. When the bracket body 225 is subjected to external forces, the reinforcing ribs 2256 can effectively disperse and resist these external forces, thereby preventing the bracket body 225 from excessive bending or deformation. The reinforcing ribs 2256 can increase the bearing capacity of the bracket body 225. When bearing a load, the reinforcing ribs 2256 can share the bearing force, reduce the stress concentration phenomenon of the bracket body 225, and thus improve the overall strength of the bracket body 225.

[0068] Please refer to Figure 4 and Figure 7 , Figure 7 yes Figure 4 The enlarged schematic diagram of the A part of the bracket 222 is shown. The frame 226 is connected to the periphery of the bracket body 225. The frame 226 includes a fixed frame 2261 and an elastic arm 2262. The fixed frame 2261 is connected to the periphery of the bracket body 225. The bracket 222 is provided with an avoidance opening 2263, and the avoidance opening 2263 passes through the fixed frame 2261 and the bracket body 225 along the thickness direction of the bracket 222.

[0069] The elastic arm 2262 is located in the avoidance opening 2263. The elastic arm 2262 includes a connecting arm 2264 and a limiting block 2265. One end of the connecting arm 2264 is connected to the fixing frame 2261. The other end of the connecting arm 2264 is connected to the limiting block 2265. The limiting block 2265 is located on the side of the connecting arm 2264 facing the bracket body 225.

[0070] In this embodiment, the elastic arm 2262 can be deformed to a large extent, thereby providing a greater tolerance for the installation of the curved mirror 221 and the bracket body 225. When the curved mirror 221 is installed on the bracket 222, the limit block 2265 of the elastic arm 2262 can contact the peripheral side of the curved mirror 221. And because the connecting arm 2264 is an elastic structure, the limit block 2265 will not apply excessive external force to the peripheral side of the curved mirror 221, thereby preventing the structure of the curved mirror 221 from being damaged.

[0071] Exemplarily, the number of the elastic arms 2262 may be at least eight. At least eight elastic arms 2262 may be arranged around the bracket body 225 at intervals.

[0072] Along the first direction, the first rotating shaft 227 and the second rotating shaft 228 are connected to opposite sides of the bracket body 225 through the fixing frame 2261. The first rotating shaft 227 and the second rotating shaft 228 are connected to the side of the fixing frame 2261 away from the bracket body 225. The towing rod 229 is connected to one long side of the bracket body 225 through the fixing frame 2261.

[0073] In this embodiment, the first rotating shaft 227 and the second rotating shaft 228 may be rotatably connected to the housing of the projection device 22. The towing rod 229 may be connected to the moving motor of the projection device 22. The first rotating shaft 227 and the second rotating shaft 228 may be coaxially arranged.

[0074] The rotation of the curved mirror 221 can be used to correct the aberrations caused by the optical machine. Rotating the curved mirror 221 can correct these aberrations, making the picture clearer and more uniform in color. By moving the curved mirror 221, the projection device 22 can adapt to different projection environments and needs. The position and size of the projected picture can be adjusted by moving the curved mirror 221 to achieve the best viewing effect.

[0075] Please refer to Figure 4 and Figure 6 , Figure 6 yes Figure 4 The structure diagram of the bracket 222, the connecting member 223 and the elastic member 224 is shown. The connecting member 223 includes a first connecting portion 2231 and a second connecting portion 2232. The first connecting portion 2231 and the second connecting portion 2232 are both connected between the bracket 222 and the curved mirror 221. The first connecting portion 2231 and the second connecting portion 2232 are connected to the middle area 2253 of the first surface 2251 of the curved mirror 221. Along the first direction, the first connecting portion 2231 and the second connecting portion 2232 are spaced apart, and the distance D between the first connecting portion 2231 and the second connecting portion 2232 is in the range of 1 / 4L-1 / 2L.

[0076] In this embodiment, the connecting member 223 can stably connect the bracket 222 and the curved mirror 221. The first connecting portion 2231 and the second connecting portion 2232 can jointly share the stress at the connection between the curved mirror 221 and the bracket 222, thereby preventing the connection of the curved mirror 221 from being slightly deformed due to excessive stress, and preventing the reflection light path of the curved mirror 221 from being changed to cause imaging distortion.

[0077] In addition, the bracket 222 of the curved mirror assembly 220 is generally made of plastic or metal, and the curved mirror 221 is generally made of glass. The thermal expansion coefficient of the bracket 222 is greatly different from that of the curved mirror 221. Under extreme temperature conditions, the bracket 222 of the curved mirror assembly 220 and the curved mirror 221 will expand and contract to varying degrees, causing the positions of the connection points of the bracket 222 and the connection points of the curved mirror 221 to change to varying degrees, causing the bracket 222 to pull the curved mirror 221 to deform. When the stress between the bracket 222 and the curved mirror 221 exceeds a certain value, the curved mirror 221 will deform or break.

[0078] The connector 223 can act as a buffer between the bracket 222 and the curved mirror 221, solve the problem of mismatched thermal expansion coefficients between the bracket 222 and the curved mirror 221, and avoid a large degree of relative deformation between the bracket 222 and the curved mirror 221, which may cause a large degree of deformation or cracking of the curved mirror 221. The curved mirror 221 structure that is not easy to crack can withstand greater external forces and impacts, thereby extending the overall service life of the head-up display system 20. The stable curved mirror 221 structure reduces the frequency of replacement due to cracks, thereby reducing maintenance costs. The stable curved mirror 221 structure can ensure the clarity and accuracy of the projected information, provide the driver with more intuitive and easy-to-read driving information, and enhance the driving experience.

[0079] Among them, the embodiment of the present application found in the simulation experiment that when the distance between the first connection part 2231 and the second connection part 2232 is less than 1 / 4L, the distance between the first connection part 2231 and the second connection part 2232 is too close, resulting in the connection position of the curved mirror 221 and the bracket 222 being too concentrated, which easily causes the curved mirror 221 to receive too concentrated stress, and easily causes the structure of the curved mirror 221 to be damaged by excessive stress. When the distance D between the first connection part 2231 and the second connection part 2232 is greater than 1 / 2L, the distance between the first connection part 2231 and the second connection part 2232 is too far, resulting in the part of the curved mirror 221 between the first connection part 2231 and the second connection part 2232 not being stably fixed on the bracket 222, resulting in the installation of the curved mirror 221 and the bracket 222 being not stable enough. When the curved mirror 221 is subjected to external force, the curved mirror 221 is easy to fall off relative to the bracket 222. In addition, since the curved mirror 221 is a curved surface. The middle area 2253 of the curved mirror 221 is recessed toward the bracket 222. If the distance between the first connection portion 2231 and the second connection portion 2232 is too far, the middle portion of the curved mirror 221 and the bracket 222 may collide easily, which may cause damage to the curved mirror 221.

[0080] Specifically, the first connection part 2231 includes at least three connection colloids, and the at least three connection colloids are arranged at intervals along the second direction. The second connection part 2232 includes at least three connection colloids, and the at least three connection colloids are arranged at intervals along the second direction.

[0081] In this embodiment, the first connection part 2231 is divided into a plurality of small connection colloids, and the second connection part 2232 is divided into a plurality of small connection colloids, so that the connection positions of the curved mirror 221 and the bracket 222 are more dispersed. The dispersion of the connection points between the curved mirror 221 and the bracket 222 can more effectively disperse the weight and force borne by the curved mirror 221, so that the bracket 222 can better support the curved mirror 221 and reduce the risk of deformation or damage caused by excessive force on a single point. This dispersed support method helps to maintain the stability of the curved mirror 221, especially when subjected to external force or vibration, it can reduce the shaking of the curved mirror 221 and improve the overall stability.

[0082] Since the connection points between the curved mirror 221 and the bracket 222 are dispersed, the force borne by each connection point is relatively small, which helps to extend the service life of the connection parts. Compared with single-point connection, the dispersed connection points are more resistant to long-term stress concentration and fatigue damage, thereby improving the durability of the connection between the curved mirror 221 and the bracket 222.

[0083] A connecting colloid is connected to the middle protrusion of a first overflowing glue groove 2291. The periphery of the connecting colloid can be located in the first overflowing glue groove 2291. The connecting colloid can be roughly circular. A connecting colloid is connected to the middle protrusion of a second overflowing glue groove 2292. The periphery of the connecting colloid can be located in the second overflowing glue groove 2292. The connecting colloid can be roughly circular. The diameter of the connecting colloid can be less than or equal to 20mm.

[0084] In this embodiment, when the colloid is squeezed by the bracket body 225 and the curved mirror 221, the excess colloid can be accommodated in the overflow groove to avoid excessive stress concentration at the connection position between the bracket body 225 and the curved mirror 221 due to too large a glue spot area.

[0085] In a possible embodiment, the elastic member 224 includes a first elastic portion 2241 and a second elastic portion 2242. One end of the bracket 222 in the long side direction is connected to the first elastic portion 2241, and the other end is connected to the second elastic portion 2242. The first elastic portion 2241 and the second elastic portion 2242 are both located between the bracket 222 and the curved mirror 221.

[0086] The first elastic portion 2241 is located at a side of the first connecting portion 2231 away from the second connecting portion 2232 , and the first elastic portion 2241 is spaced apart from the first connecting portion 2231 .

[0087] The second elastic portion 2242 is located at a side of the second connection portion 2232 away from the first connection portion 2231 , and the second elastic portion 2242 is spaced apart from the second connection portion 2232 .

[0088] In this embodiment, since the length of the curved mirror 221 is relatively large, the ends of the curved mirror 221 in the length direction may hit the bracket body 225 when vibrating or impacted. The first elastic portion 2241 and the second elastic portion 2242 can prevent the two ends of the curved mirror 221 from hard contact with the bracket body 225, and prevent the curved mirror 221 from breaking after hitting the bracket body 225.

[0089] Specifically, there are two first elastic parts 2241. Along the second direction, the two first elastic parts 2241 are arranged at intervals. One first elastic part 2241 is located in one first limiting groove 2293 and is connected to the groove wall of the first limiting groove 2293. Exemplarily, the first elastic part 2241 can be foam.

[0090] There are two second elastic parts 2242, and the two second elastic parts 2242 are arranged at intervals along the second direction. One second elastic part 2242 is located in one second limiting groove 2294 and connected to the groove wall of the second limiting groove 2294. Exemplarily, the second elastic part 2242 can be foam.

[0091] In this embodiment, the two first elastic parts 2241 may be located between the vertex position of one side of the curved mirror 221 and the bracket 222. The two second elastic parts 2242 may be located between the vertex position of the other side of the curved mirror 221 and the bracket 222. The four elastic bodies can prevent the four vertex corners of the curved mirror 221 from making hard contact with the bracket 222, and prevent the curved mirror 221 from breaking after hitting the bracket 222.

[0092] The elastic member 224 may further include a third elastic portion 2243 and a fourth elastic portion 2244 . The third elastic portion 2243 is located between the first elastic portion 2241 and the first connecting portion 2231 , and the fourth elastic portion 2244 is located between the second elastic portion 2242 and the second connecting portion 2232 .

[0093] In this embodiment, the third elastic part 2243 and the fourth elastic part 2244 can maintain a certain distance between the bracket body 225 and the curved mirror 221 to prevent the colloid from being flattened and losing the bonding strength, and to prevent the curved mirror 221 from hard contact with the bracket 222 and causing local bulging.

[0094] Specifically, the third elastic part 2243 includes two. Along the second direction, the two third elastic parts 2243 are arranged at intervals. One third elastic part 2243 can be located in one third limiting groove 2295 and connected to the groove wall of the third limiting groove 2295. Exemplarily, the third elastic part 2243 can be foam.

[0095] There are two fourth elastic parts 2244. Along the second direction, the two fourth elastic parts 2244 are arranged at intervals. One fourth elastic part 2244 can be located in one fourth limiting groove 2296 and connected to the groove wall of the fourth limiting groove 2296. Exemplarily, the fourth elastic part 2244 can be foam.

[0096] The curved mirror 221 is connected to the bracket 222. Figure 4 The frame 226 of the bracket 222 is arranged around the periphery of the curved mirror 221 .

[0097] In this embodiment, the frame 226 of the bracket 222 can effectively prevent the curved mirror 221 from being directly impacted by external forces, reducing the risk of damage. The frame 226 not only protects the curved mirror 221, but also plays a role in fixing and supporting, ensuring that the curved mirror 221 can be stably installed in the desired position.

[0098] In addition, the elastic arm 2262 structure of the frame 226 can bend in the direction away from the bracket body 225, so that after the curved mirror 221 is connected to the bracket 222, the contact area between the periphery of the curved mirror 221 and the edge of the bracket 222 is reduced, thereby reducing the abutment force of the frame 226 of the bracket 222 on the edge of the curved mirror 221, thereby avoiding the periphery of the curved mirror 221 from hard contact with the frame 226 and causing breakage or deformation.

[0099] Since the elastic arm 2262 can reduce the force applied by the frame 226 of the bracket 222 to the curved mirror 221, during the manual assembly of the curved mirror 221 and the bracket 222, the elastic arm 2262 can also provide a certain degree of tolerance for manual operation, thereby improving the installation yield of the curved mirror 221 and the bracket 222 and preventing the frame 226 from applying excessive force to the curved mirror 221, causing the curved mirror 221 to break.

[0100] The above are exemplary embodiments of the present application. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made thereto without departing from the principles of the present application, and these improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A curved mirror assembly, rotatably connected to a housing of a projection device, characterized in that: include: A curved mirror, wherein along a first direction, the size of the curved mirror is L, wherein the first direction is the long side direction of the curved mirror; A bracket, comprising a bracket body, a first rotating shaft and a second rotating shaft, wherein the first rotating shaft and the second rotating shaft are connected to opposite sides of the bracket body along the first direction, the bracket body and the curved mirror are stacked, and the first rotating shaft and the second rotating shaft are rotatably connected to the housing; The connecting member includes a first connecting part and a second connecting part, wherein the first connecting part and the second connecting part are both connected between the bracket and the curved mirror, the first connecting part and the second connecting part are connected to the middle area of ​​the curved mirror, and along the first direction, the first connecting part and the second connecting part are spaced apart, and the distance between the first connecting part and the second connecting part ranges from 1 / 4L to 1 / 2L.

2. The curved mirror assembly according to claim 1, characterized in that: The first connecting portion includes at least two connecting colloids, and along the second direction, the at least two connecting colloids of the first connecting portion are arranged at intervals, wherein the second direction is the wide side direction of the curved mirror; The second connection portion includes at least two connection colloids, and along the second direction, the at least two connection colloids of the second connection portion are spaced apart.

3. The curved mirror assembly according to claim 1 or 2, characterized in that: The bracket body is provided with a first connecting protrusion and a second connecting protrusion, in the first direction, the first connecting protrusion and the second connecting protrusion are arranged at an interval, the bracket body has a center line, the center line extends along the second direction, and the first connecting protrusion and the second connecting protrusion are symmetrical about the center line; The first connection portion is connected to the first connection protrusion, and the second connection portion is connected to the second connection protrusion.

4. The curved mirror assembly according to claim 3, characterized in that: The number of the first connection protrusions is at least three, and the at least three first connection protrusions are arranged at intervals along the second direction. The first connection portion includes at least three connection colloids, and one connection colloid of one first connection portion is connected to one first connection protrusion; The number of the second connection protrusions is at least three, and at least three second connection protrusions are arranged at intervals along the second direction. The second connection part includes at least three connection colloids, and one connection colloid of one second connection part is connected to one second connection protrusion.

5. The curved mirror assembly according to claim 1 or 2, characterized in that: The curved mirror assembly further comprises a first elastic portion and a second elastic portion, one end of the bracket in the long side direction is connected to the first elastic portion, and the other end is connected to the second elastic portion; The first elastic portion and the second elastic portion are both located between the bracket and the curved mirror, the first elastic portion is located on a side of the first connecting portion away from the second connecting portion, the first elastic portion is spaced apart from the first connecting portion, the second elastic portion is located on a side of the second connecting portion away from the first connecting portion, and the second elastic portion is spaced apart from the second connecting portion.

6. The curved mirror assembly according to claim 5, characterized in that: The number of the first elastic parts is two, the number of the second elastic parts is two, and along the second direction, the two first elastic parts are arranged at intervals, and the two second elastic parts are arranged at intervals.

7. The curved mirror assembly according to claim 5, characterized in that: The curved mirror assembly further includes a third elastic portion and a fourth elastic portion, wherein the third elastic portion and the fourth elastic portion are located between the first elastic portion and the second elastic portion, and the third elastic portion and the fourth elastic portion are spaced apart from each other.

8. The curved mirror assembly according to claim 1 or 2, characterized in that: The bracket further includes a frame, which is arranged around the periphery of the bracket body. Along a first direction, the first rotating shaft and the second rotating shaft are connected to opposite sides of the frame, and the frame is arranged around the curved mirror.

9. The curved mirror assembly according to claim 8, characterized in that: The frame includes a fixed frame and an elastic arm, the fixed frame is fixedly connected to the edge of the bracket body, the fixed frame is connected around the periphery of the bracket body, and the fixed frame is arranged around the curved mirror; The bracket is provided with an avoidance opening, and along the thickness direction of the bracket, the avoidance opening passes through the fixing frame and the bracket body, the elastic arm is located in the avoidance opening, one end of the elastic arm is connected to the fixing frame, and there is a gap between the elastic arm and the bracket body.

10. The curved mirror assembly according to claim 9, characterized in that: The elastic arm comprises a connecting arm and a limiting block, one end of the connecting arm is connected to the fixing frame, and the other end is connected to the limiting block, and the limiting block is protrudingly arranged on the surface of the connecting arm facing the bracket body.

11. A projection device, characterized in that: It comprises an optical machine, a shell and a curved mirror assembly as described in any one of claims 1 to 10, wherein a first rotating shaft and a second rotating shaft of the curved mirror assembly are rotatably connected to the shell, and the optical machine is used to emit light to the curved mirror, and the light can be reflected on the surface of the curved mirror.

12. A head-up display system, characterized in that: The head-up display system includes an imaging device and the projection device as claimed in claim 11, and the imaging device can receive the light emitted by the projection device to present an image.

13. A vehicle, characterized in that: It comprises a vehicle body and the head-up display system as claimed in claim 12, wherein the head-up display system is installed in the vehicle body.

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