A head-up display

Abstract

The utility model discloses a head-up display, include: casing, casing is equipped with first containing groove, second containing groove, third containing groove, first containing groove is opposite with second containing groove and is located the same side with first containing groove or second containing groove, first reflector, first reflector is equipped with first protruding, second protruding, third protruding, along length direction, first protruding, second protruding are located the both sides of first reflector, first protruding and first containing groove concave and convex cooperation, second protruding and second containing groove concave and convex cooperation, third protruding and third containing groove concave and convex cooperation, upper cover, upper cover and casing fixed connection, and with first protruding, second protruding, third protruding abut. The utility model can solve the problem that the mirror in the head-up display device of existing is deformed because of installation stress, and further leads to the problem that the projection quality is damaged.

Description

Technical Field

[0001] This utility model relates to the field of automotive head-up display technology, and in particular to a head-up display. Background Technology

[0002] Head-up displays (HUDs), also known as head-up display systems, are primarily used to project key driving information such as vehicle speed, navigation guidance, turn signals, and adaptive cruise control (ACC) status in front of the driver's field of vision. As automotive interior design becomes increasingly technologically advanced, augmented reality HUDs are being used more and more widely in driving information display scenarios. Currently, the mainstream HUD imaging system generally adopts a combination structure of a small reflector and a large reflector. This structure not only helps to reduce the space required for the HUD within the vehicle but also achieves a larger imaging area and a greater projection distance for the virtual image effect. However, in the current market, the small reflector of the HUD is often directly fixed to the main housing with screws, and this rigid connection method has certain technical limitations.

[0003] As a key component in the optical path, the small reflector is responsible for reflecting the light emitted by the Picture Generation Unit (PGU) to the large reflector. Its surface accuracy directly determines the final image quality of the AR-HUD. Screw fixing, as a rigid connection, is difficult to effectively absorb the stress generated during component manufacturing tolerances and assembly. Instead, it easily allows external forces accumulated at the mounting point to be transmitted to the reflective area of ​​the small reflector, causing mirror deformation. Once the surface accuracy of the small reflector is damaged, it will lead to distortion or ghosting of the projected virtual image, seriously affecting the clarity and comfort of the driver's information acquisition, increasing visual fatigue, and potentially posing a threat to driving safety.

[0004] Therefore, there is an urgent need for a head-up display that prevents mirror distortion to ensure clear imaging. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the prior art where the reflector deforms due to installation stress, resulting in a loss of projected image quality.

[0006] To address the aforementioned technical problems, this utility model discloses a head-up display, comprising:

[0007] The housing is provided with a first receiving groove, a second receiving groove, and a third receiving groove. The first receiving groove and the second receiving groove are arranged opposite to each other, and the third receiving groove is located on the same side as the first receiving groove or the second receiving groove.

[0008] The first reflector has a first protrusion, a second protrusion, and a third protrusion. Along the length direction, the first protrusion and the second protrusion are located on both sides of the first reflector. The first protrusion is in concave-convex fit with the first receiving groove, the second protrusion is in concave-convex fit with the second receiving groove, and the third protrusion is in concave-convex fit with the third receiving groove.

[0009] The top cover is fixedly connected to the housing and abuts against the first protrusion, the second protrusion, and the third protrusion.

[0010] By adopting the above technical solution, the traditional screw connection is replaced by a receiving groove on the housing that engages with the protrusions and recesses of the first reflector. This fundamentally eliminates the mechanical preload applied to the first reflector when screws are tightened, preventing deformation of the first reflector due to uneven stress and thus preventing image distortion. Furthermore, the first and second receiving grooves are positioned opposite each other, and the third receiving groove is located on the same side as either the first or second receiving groove, forming a triangular distribution. Utilizing the stability principle of a triangle, the fixation of the first reflector is more secure and reliable. Moreover, the top cover abuts against all the protrusions, providing height-direction restraint for the protruding structures within the receiving grooves, effectively preventing displacement or rotation during operation, ultimately ensuring the long-term accuracy and stability of the optical components.

[0011] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a head-up display, wherein the first protrusion, the second protrusion, and the third protrusion all extend along the length direction and along the height direction, the first protrusion has a first top end and a first bottom end, the second protrusion has a second top end and a second bottom end, and the third protrusion has a third top end and a third bottom end;

[0012] The first bottom end is disposed in the first receiving groove, and the first top end protrudes from the first receiving groove; the second bottom end is disposed in the second receiving groove, and the second top end protrudes from the second receiving groove; the third bottom end is disposed in the third receiving groove, and the third top end protrudes from the third receiving groove.

[0013] The top cover abuts against the first top, the second top, and the third top.

[0014] By adopting the above technical solution, the first, second, and third protrusions protrude from their corresponding receiving grooves and are directly abutted against by the top cover. This creates a tight fit between the protrusions of the first reflector and the housing and top cover, effectively constraining the first reflector and preventing it from moving or rotating along the direction from the housing to the top cover during use, thus ensuring the stability of the optical system.

[0015] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a head-up display, wherein the third bottom end is arc-shaped;

[0016] The third receiving groove has an inner wall that is adapted to the third bottom end.

[0017] Using the above technical solution, the third protrusion and the third receiving groove are connected by an arc-shaped concave-convex fit. On the one hand, the self-guiding characteristic of the arc facilitates assembly; on the other hand, it can evenly distribute stress and avoid stress concentration and wear at the corners. Furthermore, the third receiving groove and the third bottom end are contoured and completely cover the third bottom end, restricting the movement of the first reflecting mirror.

[0018] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a head-up display, wherein the inner wall is provided with a plurality of abutment surfaces, each of which contacts the third bottom end point.

[0019] By adopting the above technical solution, multiple independent contact surfaces are set on the inner wall, and each contact surface makes point contact with the third bottom end, forming a multi-point positioning constraint. This not only reduces the assembly stress caused by processing errors and avoids interference or misalignment that may occur due to surface contact, but also restricts the degree of freedom of the third bottom end in space through discrete contact points, achieving a reliable positioning effect with minimal contact area.

[0020] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a head-up display, wherein the first bottom end and the second bottom end are both arc-shaped;

[0021] The first receiving groove has a first side wall and a first bottom wall, and the second receiving groove has a second side wall and a second bottom wall;

[0022] The first bottom wall is in contact with the first bottom end point, and the first side wall is in contact with the first bottom end point; the second bottom wall is in contact with the second bottom end point, and the second side wall is in contact with the second bottom end point.

[0023] By adopting the above technical solution, the first and second bottom ends are designed as arcs, and point contacts are formed with the bottom and side walls of the corresponding receiving grooves, thus jointly constructing a stable multi-point positioning. At the same time, in conjunction with the third receiving groove, the full degree of freedom constraint of the first reflecting mirror can be achieved without contour design, reducing the requirements for the machining accuracy of the first and second receiving grooves.

[0024] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a head-up display, wherein along the length direction, the first receiving groove has a first end wall, the second receiving groove has a second end wall, the first protrusion has a gap with the first end wall, and the second protrusion has a gap with the second end wall.

[0025] Using the above technical solution, a gap is left between the protrusion and the corresponding receiving groove in the length direction, which facilitates the installation of the first reflector and can accommodate dimensional and installation tolerances. The first receiving groove, the second receiving groove, and the contoured third receiving groove work together to improve the fault tolerance of the assembly while ensuring full degree of freedom constraints.

[0026] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a head-up display, wherein the cross-sections of the first receiving groove and the second receiving groove are both U-shaped along the height direction.

[0027] By adopting the above technical solution, by defining the shapes of the first and second receiving grooves, not only are their structural features clarified, but it is also ensured that the first and second protrusions can form stable multi-point contact with the corresponding receiving grooves, thereby restricting the movement of the first reflector.

[0028] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a head-up display, wherein the first top end, the second top end, and the third top end are all arc-shaped; the upper cover is provided with multiple contact surfaces, and the multiple contact surfaces respectively make point contact with the first top end, the second top end, and the third top end.

[0029] By adopting the above technical solution, the top cover and the corresponding protrusion use a point-contact abutment method, which not only reduces friction but also provides the necessary deformation buffer space for the protrusion. This effectively prevents the squeezing force generated by seamless surface contact from being transmitted to the mirror surface of the first reflector, thus avoiding deformation of the first reflector and ensuring optical accuracy. Even if the protrusion deforms, the point-contact characteristic ensures that the protrusion abuts against the top cover, ensuring that the first reflector remains fixed to the housing.

[0030] According to another specific embodiment of the present invention, a head-up display is disclosed, wherein a buffer is provided between the top cover and the first top end, the second top end, and the third top end.

[0031] By adopting the above technical solution, the buffer can effectively absorb external vibration and impact, and prevent the protrusion from shifting or deforming due to force.

[0032] According to another specific embodiment of the present invention, a head-up display is disclosed, wherein the housing further includes:

[0033] The first mounting part has a first top surface, and the first top surface is an inclined surface;

[0034] The second mounting portion has a second top surface, which is an inclined surface; along the length direction, the first mounting portion and the second mounting portion are spaced apart and form an upward notch, and the first top surface and the second top surface are disposed opposite to each other;

[0035] The head-up display also includes:

[0036] A first column extends along the height direction and is disposed on the first top surface, and the first receiving groove is disposed on the top of the first column;

[0037] The second column extends along the height direction and is disposed on the second top surface, and the second receiving groove is disposed on the top of the second column;

[0038] A third column extends along the height direction and is disposed on the first top surface or the second top surface, spaced apart from the first column or the second column along the first top surface or the second top surface; the third receiving groove is disposed on the top of the third column;

[0039] An image generation unit is disposed inside the housing, facing the notch along the width direction; the first reflector is disposed in the light emission direction of the image generation unit;

[0040] The second reflector is disposed inside the housing and is positioned in the light reflection direction of the first reflector.

[0041] By employing the above technical solution, and by setting pillars at corresponding positions in the receiving groove, it is ensured that the first reflecting mirror only contacts the receiving groove and the top cover, thereby isolating it from other components within the housing and effectively preventing lens deformation caused by improper contact. Furthermore, the "triangular" distribution of the three pillars structurally ensures the stability of the first reflecting mirror.

[0042] Meanwhile, by setting a notch and configuring a second reflector, the reflected light path of the displayed image is clearly defined, ensuring the accuracy and reliability of the optical path. Attached Figure Description

[0043] Figure 1 A perspective view of a head-up display according to an embodiment of the present invention is shown;

[0044] Figure 2 Show Figure 1 A cross-sectional view along the AA direction;

[0045] Figure 3 Show Figure 2 Enlarged view of section E in the middle;

[0046] Figure 4A perspective view of a portion of the head-up display according to an embodiment of the present invention is shown;

[0047] Figure 5 A perspective view of the first reflecting mirror according to an embodiment of the present invention is shown;

[0048] Figure 6 A perspective view of another part of the head-up display according to an embodiment of the present invention is shown;

[0049] Figure 7 Show Figure 6 Enlarged view of the middle section (I);

[0050] Figure 8 Show Figure 6 Enlarged view of the middle J section;

[0051] Figure 9 Show Figure 6 Enlarged view of section K;

[0052] Figure 10 Show Figure 4 Enlarged view of section F in the middle;

[0053] Figure 11 Show Figure 10 Cross-sectional view along the BB direction;

[0054] Figure 12 Show Figure 4 Enlarged view of section G in the middle;

[0055] Figure 13 Show Figure 12 A cross-sectional view along the CC direction;

[0056] Figure 14 Show Figure 4 Enlarged view of the middle H section;

[0057] Figure 15 Show Figure 14 A cross-sectional view along the DD direction;

[0058] Figure 16 This diagram shows the top cover and the buffer component of an embodiment of the present invention.

[0059] Figure label:

[0060] Head-up display 100;

[0061] Housing 110; First receiving groove 111; First side wall 1111; First bottom wall 1112; First end wall 1113; Second receiving groove 112; Second side wall 1121; Second bottom wall 1122; Second end wall 1123; Third receiving groove 113; Inner wall 1131; Abutment surface 1132; First mounting part 114; First top surface 1141; Second mounting part 115; Second top surface 1151; Notch 116;

[0062] First reflector 120; first protrusion 121; first top end 1211; first bottom end 1212; second protrusion 122; second top end 1221; second bottom end 1222; third protrusion 123; third top end 1231; third bottom end 1232;

[0063] Top cover 130; Contact surface 131;

[0064] Buffer 140;

[0065] Image generation unit 150;

[0066] First column 161; Second column 162; Third column 163;

[0067] The second reflecting mirror is 170°. Detailed Implementation

[0068] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0069] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0070] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0071] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0072] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0073] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0074] In existing head-up display devices, small and large reflectors are often used together to project images onto a preset screen. However, the small reflector is usually directly connected to the housing via threads, and the assembly stress generated during the screwing process can easily cause deformation of the mirror body, ultimately leading to distortion of the reflected image.

[0075] To address the aforementioned issues, this application provides a head-up display that replaces the traditional screw connection by providing a receiving groove on the housing and having it engage with the protrusions and recesses of the first reflector. This fundamentally eliminates the mechanical preload applied to the first reflector when screws are tightened, preventing the first reflector from deforming due to uneven stress and thus preventing distortion of the reflected image.

[0076] refer to Figures 1 to 4 In this embodiment, this application provides a head-up display 100, including: a housing 110, a first reflector 120, a top cover 130, a buffer 140, an image generation unit 150, a first pillar 161, a second pillar 162, a third pillar 163, and a second reflector 170. The housing 110 is provided with a first receiving groove 111, a second receiving groove 112, and a third receiving groove 113, along the length direction ( Figure 4In the X direction), the first receiving groove 111 and the second receiving groove 112 are arranged opposite to each other, the third receiving groove 113 and the second receiving groove 112 are located on the same side, and the third receiving groove 113 and the second receiving groove 112 are arranged at intervals.

[0077] With the first receiving groove 111 and the second receiving groove 112 arranged opposite to each other, and the third receiving groove 113 located on the same side as the second receiving groove 112, the three receiving grooves form a "triangle" distribution. By utilizing the stability principle of triangles, preparations are made for a more stable fixation of the first reflector 120.

[0078] In some possible implementations, the third receiving groove 113 may also be located on the same side as the first receiving groove 111, with the third receiving groove 113 and the first receiving groove 111 being spaced apart. As long as the third receiving groove 113 is on the same side as any one of the first receiving groove 111 and the second receiving groove 112, forming a triangular layout, the embodiments of this application are not limited in this respect.

[0079] refer to Figures 1 to 4 In this embodiment, the upper cover 130 is fixedly connected to the housing 110. A closed space is formed between the upper cover 130 and the housing 110 to accommodate components such as the first reflector 120, the second reflector 170, and the image generation unit 150.

[0080] refer to Figure 2 , Figure 3 , Figure 4 In this embodiment, the first reflector 120 is rectangular and has a first protrusion 121, a second protrusion 122, and a third protrusion 123. All three protrusions extend along their length and correspond to the first receiving groove 111, the second receiving groove 112, and the third receiving groove 113, respectively. The first protrusion 121 engages with the first receiving groove 111, the second protrusion 122 engages with the second receiving groove 112, and the third protrusion 123 engages with the third receiving groove 113.

[0081] In some possible implementations, the shape of the first reflector 120 may include, but is not limited to, a rectangle, and may be a trapezoid, a circle, an ellipse, etc., as long as it can reflect the image. The implementation of this application does not limit this.

[0082] refer to Figure 2 , Figure 3 , Figure 4 In this embodiment, foam is provided between the upper cover 130 and the first protrusion 121, the second protrusion 122 and the third protrusion 123, and the upper cover 130 abuts against the first protrusion 121, the second protrusion 122 and the third protrusion 123 through the foam.

[0083] In some possible implementations, the buffer 140 disposed between the top cover 130 and the first protrusion 121, the second protrusion 122, and the third protrusion 123 includes, but is not limited to, foam, and can be a silicone pad, a rubber pad, a spring sheet, or other elastic element. As long as it can effectively provide cushioning and flexible connection, it can be selected according to the actual structural requirements.

[0084] Among them, the buffer 140 can effectively absorb external vibration and impact, and prevent the protrusion from shifting or deforming due to force.

[0085] refer to Figure 4 , Figure 5 In this embodiment, along the length direction, the first protrusion 121 and the second protrusion 122 are located on both sides of the first reflector 120, and the third protrusion 123 is located on the same side of the first reflector 120 as the second protrusion 122. The third protrusion 123 and the second protrusion 122 located on the same side are spaced apart to form a triangular layout corresponding to the first receiving groove 111, the second receiving groove 112, and the third receiving groove 113.

[0086] In some possible implementations, the third protrusion 123 may also be located on the same side of the first reflector 120 as the first protrusion 121, with the third protrusion 123 and the first protrusion 121 on the same side being spaced apart. As long as the third protrusion 123 is on the same side as any one of the first protrusion 121 and the second protrusion 122, forming a triangular layout, the embodiments of this application are not limited in this respect.

[0087] refer to Figure 4 , Figure 5 In this embodiment, along the height direction ( Figure 4 In the Z direction, the first protrusion 121 has a first top end 1211 and a first bottom end 1212, the second protrusion 122 has a second top end 1221 and a second bottom end 1222, and the third protrusion 123 has a third top end 1231 and a third bottom end 1232.

[0088] refer to Figure 4 , Figure 5 In this embodiment, the first tip 1211, the second tip 1221, and the third tip 1231 are all arc-shaped, and the upper cover 130 abuts against the first tip 1211, the second tip 1221, and the third tip 1231.

[0089] In some possible implementations, the shapes of the first tip 1211, the second tip 1221, and the third tip 1231 are not limited to arc shapes, and can be rectangular, trapezoidal, conical, etc., as long as they can abut against the top cover 130. The implementation of this application does not limit this.

[0090] refer to Figure 4 , Figure 5 In this embodiment, the first bottom end 1212, the second bottom end 1222, and the third bottom end 1232 are all hemispherical. When they abut against the receiving groove, they can transform the surface contact into point contact, thereby effectively compensating for the fit tolerance between parts and reducing the requirements for machining accuracy.

[0091] In some possible implementations, the shapes of the first bottom end 1212, the second bottom end 1222, and the third bottom end 1232 are not limited to hemispherical, and can be arc-shaped, rectangular, conical, etc., to ensure that they are set in the corresponding receiving groove and that the first reflector 120 is fixed.

[0092] refer to Figure 4 , Figure 5 , Figure 6 In this embodiment, the housing 110 includes: a first mounting portion 114 having a first top surface 1141, which is an inclined surface; and a second mounting portion 115 having a second top surface 1151, which is an inclined surface; the first mounting portion 114 and the second mounting portion 115 are spaced apart along the length direction and form an upward notch 116, and the first top surface 1141 and the second top surface 1151 are disposed opposite to each other.

[0093] refer to Figure 4 , Figure 5 , Figure 6 In this embodiment, the head-up display 100 further includes an image generation unit 150, used to generate a corresponding image and emit the image in the form of light. The image generation unit 150 is disposed within the housing 110, along the width direction ( Figure 6 (in the Y direction), directly opposite the notch 116; the first reflector 120 is positioned in the light-emitting direction a of the image generation unit 150 ( Figure 4 The second reflector 170 is disposed inside the housing 110, and is positioned in the light reflection direction b of the first reflector 120. Figure 4 (in the direction of b)

[0094] refer to Figure 4 , Figure 5 , Figure 6 In this embodiment, a first column 161 extends along the height direction and is disposed on a first top surface 1141, and a first receiving groove 111 is disposed on the top of the first column 161; a second column 162 extends along the height direction and is disposed on a second top surface 1151, and a second receiving groove 112 is disposed on the top of the second column 162; a third column 163 extends along the height direction and is disposed on the second top surface 1151, located on the same side as the second column 162, and spaced apart along the second top surface 1151; a third receiving groove 113 is disposed on the top of the third column 163.

[0095] In some possible implementations, the third column 163 is disposed on the first top surface 1141, located on the same side as the first column 161, and spaced apart along the first top surface 1141, so as to correspond to the position of the corresponding receiving groove. This application does not limit this implementation.

[0096] The image generation unit 150 generates an image and transmits the image through the notch 116 to the first reflector 120; the first reflector 120 reflects the received image to the second reflector 170; the second reflector 170 receives the image and reflects the image through the top cover 130 to the outside of the head-up display 100.

[0097] By setting pillars at corresponding positions in the receiving groove, it is ensured that the first reflector 120 only contacts the receiving groove and the top cover 130, thereby isolating it from other components inside the housing 110 and effectively preventing lens deformation caused by improper contact. Furthermore, the "triangular" distribution of the three pillars structurally ensures the stability of the first reflector 120.

[0098] Meanwhile, by setting the notch 116 and configuring the second reflector 170, the reflected light path of the displayed image is clearly defined, ensuring the accuracy and reliability of the optical path.

[0099] refer to Figure 6 , Figure 7 , Figure 8 In this embodiment, the cross-sections of the first receiving groove 111 and the second receiving groove 112 are both U-shaped along the height direction. By defining the shapes of the first receiving groove 111 and the second receiving groove 112, not only are their structural features clearly defined, but it is also ensured that the first protrusion 121 and the second protrusion 122 can form stable multi-point contact with the corresponding receiving groove, thereby limiting the movement of the first reflector 120.

[0100] refer to Figure 6 , Figure 7 , Figure 8 In this embodiment, the first receiving groove 111 has a first side wall 1111 and a first bottom wall 1112. The second receiving groove 112 has a second side wall 1121 and a second bottom wall 1122. The first receiving groove 111 and the second receiving groove 112 have the same shape, and their openings are arranged opposite each other along the length direction. The first bottom wall 1112 and the second bottom wall 1122 are both arc-shaped, and the first side wall 1111 and the second side wall 1121 are both inclined surfaces.

[0101] In some possible implementations, the first sidewall 1111 and the second sidewall 1121 include, but are not limited to, inclined surfaces, and can be vertical planes, curved surfaces, etc. The shapes of the first bottom wall 1112 and the second bottom wall 1122 include, but are not limited to, arc shapes, and can be V-shaped, rectangular, etc. The shapes of the first bottom wall 1112, the second bottom wall 1122, the first sidewall 1111, and the second sidewall 1121 can be matched with the corresponding protrusions to make point contact; the embodiments of this application do not limit this.

[0102] refer to Figure 6 , Figure 7 , Figure 8 In this embodiment, along the length direction, the first receiving groove 111 has a first end wall 1113, and the second receiving groove 112 has a second end wall 1123.

[0103] refer to Figure 9 In this embodiment, the third receiving groove 113 has an inner wall 1131 that fits with the third bottom end 1232, forming a spherical groove. The third protrusion 123 and the third receiving groove 113 are connected by an arc-shaped concave-convex fit. This design facilitates assembly by utilizing the self-guiding properties of the arc shape and evenly distributes stress, preventing stress concentration and wear at the corners. Furthermore, the third receiving groove 113 and the third bottom end 1232 are shaped to completely cover the third bottom end 1232, restricting the movement of the first reflector 120.

[0104] refer to Figure 9 In this embodiment, the inner wall 1131 is provided with four abutment surfaces 1132, which are spaced apart from each other. Each abutment surface 1132 is a circular plane.

[0105] In some possible implementations, the number of abutment surfaces 1132 includes, but is not limited to, four; it can be two, three, five, eight, or more. The shape of the abutment surfaces 1132 includes, but is not limited to, a circle; it can be square, rectangular, elliptical, etc. The shape can be selected according to actual needs.

[0106] By setting multiple independent abutment surfaces 1132 on the inner wall 1131, and ensuring that each abutment surface 1132 makes point contact with the third bottom end 1232, a multi-point positioning constraint is formed. This not only reduces assembly stress caused by machining errors and avoids interference or misalignment that may occur due to surface contact, but also restricts the degree of freedom of the third bottom end 1232 in space through discrete contact points, achieving a reliable positioning effect with the minimum contact area 131.

[0107] refer to Figure 10 , Figure 11In this embodiment, the first bottom end 1212 is disposed in the first receiving groove 111, and the first top end 1211 protrudes from the first receiving groove 111. The first bottom wall 1112 is in point contact with the first bottom end 1212, and the first side wall 1111 is in point contact with the first bottom end 1212. Along the length direction, the first protrusion 121 and the first end wall 1113 are provided with a gap.

[0108] In some possible implementations, there may be no gap between the first protrusion 121 and the first end wall 1113, and the embodiments of this application do not limit this.

[0109] refer to Figure 12 , Figure 13 In this embodiment, the second bottom end 1222 is disposed in the second receiving groove 112, and the second top end 1221 protrudes from the second receiving groove 112; the second bottom wall 1122 is in point contact with the second bottom end 1222, and the second side wall 1121 is in point contact with the second bottom end 1222. Along the length direction, the second protrusion 122 and the second end wall 1123 are provided with a gap.

[0110] In some possible implementations, there may be no gap between the second protrusion 122 and the second end wall 1123, and the embodiments of this application do not limit this.

[0111] By designing the first bottom end 1212 and the second bottom end 1222 as arc-shaped, and forming point contact with the bottom wall and side wall of the corresponding receiving groove, a stable multi-point positioning is constructed. At the same time, in conjunction with the third receiving groove 113, the full degree of freedom constraint of the first reflector 120 can be achieved without contour design, reducing the requirements for the machining accuracy of the first receiving groove 111 and the second receiving groove 112.

[0112] The first protrusion 121 and the second protrusion 122 have gaps in the length direction with their corresponding receiving grooves, which facilitates the installation of the first reflector 120 and can accommodate dimensional and installation tolerances. The first receiving groove 111, the second receiving groove 112 and the contoured third receiving groove 113 work together to improve the fault tolerance of the assembly while ensuring full degree of freedom constraints.

[0113] refer to Figure 14 , Figure 15 In this embodiment, the third bottom end 1232 is disposed in the third receiving groove 113, and the third top end 1231 protrudes from the third receiving groove 113; each abutment surface 1132 is in point contact with the third bottom end 1232. The third protrusion 123 and the third receiving groove 113 are connected by an arc-shaped concave-convex fit, which facilitates assembly by utilizing the self-guiding characteristics of the arc shape, and evenly distributes stress, avoiding stress concentration and wear at the corners. Furthermore, the third receiving groove 113 and the third bottom end 1232 are shaped to completely cover the third bottom end 1232, restricting the movement of the first reflector 120.

[0114] The first protrusion 121, the second protrusion 122, and the third protrusion 123 protrude from their corresponding receiving grooves and directly abut against the corresponding protruding parts using the upper cover 130. This creates a tight fit between the protrusions of the first reflector 120 and the housing 110 and the upper cover 130, effectively constraining the first reflector 120 and preventing it from moving or rotating along the direction from the housing 110 to the upper cover 130 during use, thus ensuring the stability of the optical system.

[0115] refer to Figure 16 In this embodiment, the upper cover 130 is provided with multiple contact surfaces 131, which respectively make point contact with the first top end 1211, the second top end 1221, and the third top end 1231. The contact surfaces 131 are planar.

[0116] In some possible implementations, the contact surface 131 may include, but is not limited to, a plane, or may be an inclined plane, an arc surface, etc., as long as it can make point contact with the first top end 1211, the second top end 1221, and the third top end 1231. The implementation of this application does not limit this.

[0117] The top cover 130 and the corresponding protrusion adopt a point-contact abutment method, which not only reduces friction but also provides necessary deformation buffer space for the protrusion. This effectively prevents the squeezing force generated by seamless surface contact from being transmitted to the mirror surface of the first reflector 120, causing deformation of the first reflection and thus ensuring optical accuracy. Even if the protrusion deforms, the point contact characteristic ensures that the protrusion abuts against the top cover 130, ensuring that the first reflector 120 is always fixed on the housing 110.

[0118] The spherical third bottom end 1232 is placed into the matching spherical third receiving groove 113, and the four contact surfaces 1132 in the spherical third receiving groove 113 restrict the freedom of the first reflector 120 in the length and width directions. The spherical first bottom end 1212 and second bottom end 1222 are respectively placed into the U-shaped first receiving groove 111 and second receiving groove 112. The first protrusion 121 and the second protrusion 122 are respectively provided with gaps with the first end wall 1113 and the second end wall 1123, which restricts the freedom of the first reflector 120 in the width direction while allowing for processing errors in the length direction. The arc-shaped first top end 1211, second top end 1221, and third top end 1231 are pressed against the contact surface 131 of the top cover 130. The pressing method is point contact, which restricts the freedom of the first reflector 120 in the height direction.

[0119] The foam cushioning component 140 is attached to the three contact surfaces 131 of the top cover 130, which can effectively solve the problem of external force transmitted to the first reflector 120 due to flatness and position deviation in traditional surface contact. At the same time, the elastomeric foam tape is selected as the medium for pressing the top cover 130 and the small aspherical mirror, which further absorbs the machining tolerance and assembly tolerance of the first reflector 120 parts, improves the influence of external force on the surface shape of the first reflector 120, and improves the imaging quality of the virtual image.

[0120] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A heads-up display, characterized in that, include: The housing is provided with a first receiving groove, a second receiving groove, and a third receiving groove. The first receiving groove and the second receiving groove are arranged opposite to each other, and the third receiving groove is located on the same side as the first receiving groove or the second receiving groove. The first reflector has a first protrusion, a second protrusion, and a third protrusion. Along the length direction, the first protrusion and the second protrusion are located on both sides of the first reflector. The first protrusion is in concave-convex fit with the first receiving groove, the second protrusion is in concave-convex fit with the second receiving groove, and the third protrusion is in concave-convex fit with the third receiving groove. The top cover is fixedly connected to the housing and abuts against the first protrusion, the second protrusion, and the third protrusion.

2. The head-up display as claimed in claim 1, characterized in that, The first protrusion, the second protrusion, and the third protrusion all extend along the length direction. Along the height direction, the first protrusion has a first top end and a first bottom end, the second protrusion has a second top end and a second bottom end, and the third protrusion has a third top end and a third bottom end. The first bottom end is disposed in the first receiving groove, and the first top end protrudes out of the first receiving groove; the second bottom end is disposed in the second receiving groove, and the second top end protrudes out of the second receiving groove; The third bottom end is disposed in the third receiving groove, and the third top end protrudes from the third receiving groove; The top cover abuts against the first top, the second top, and the third top.

3. The head-up display as described in claim 2, characterized in that, The third bottom end is arc-shaped; The third receiving groove has an inner wall that is adapted to the third bottom end.

4. The head-up display as described in claim 3, characterized in that, The inner wall is provided with multiple abutment surfaces, each of which is in contact with the third bottom end point.

5. The head-up display as described in claim 2, characterized in that, Both the first bottom end and the second bottom end are arc-shaped; The first receiving groove has a first side wall and a first bottom wall, and the second receiving groove has a second side wall and a second bottom wall; The first bottom wall is in contact with the first bottom end point, and the first side wall is in contact with the first bottom end point; The second bottom wall is in contact with the second bottom end point, and the second side wall is in contact with the second bottom end point.

6. The head-up display as claimed in claim 5, characterized in that, Along the length direction, the first receiving groove has a first end wall, the second receiving groove has a second end wall, the first protrusion has a gap with the first end wall, and the second protrusion has a gap with the second end wall.

7. The head-up display as claimed in claim 6, characterized in that, Along the height direction, the cross-sections of the first and second receiving grooves are both U-shaped.

8. The head-up display as claimed in claim 2, characterized in that, The first top end, the second top end, and the third top end are all arc-shaped; the upper cover is provided with multiple contact surfaces, and the multiple contact surfaces respectively make point contact with the first top end, the second top end, and the third top end.

9. The head-up display as claimed in claim 8, characterized in that, A buffer is provided between the top cover and the first top end, the second top end, and the third top end.

10. The head-up display as claimed in any one of claims 1-9, characterized in that, The housing also includes: The first mounting part has a first top surface, and the first top surface is an inclined surface; The second mounting portion has a second top surface, which is an inclined surface; along the length direction, the first mounting portion and the second mounting portion are spaced apart and form an upward notch, and the first top surface and the second top surface are disposed opposite to each other; The head-up display also includes: The first column extends along the height direction and is disposed on the first top surface, and the first receiving groove is disposed on the top of the first column; The second column extends along the height direction and is disposed on the second top surface, and the second receiving groove is disposed on the top of the second column; A third column extends along the height direction and is disposed on the first top surface or the second top surface, spaced apart from the first column or the second column along the first top surface or the second top surface; the third receiving groove is disposed on the top of the third column; An image generation unit is disposed within the housing, facing the notch along its width direction; a first reflector is disposed in the light emission direction of the image generation unit; a second reflector is disposed within the housing, in the light reflection direction of the first reflector.

Images