Curved mirror supporting structure of head-up display and head-up display

Abstract

The invention relates to a curved mirror supporting structure of a head-up display and the head-up display. The curved mirror supporting structure of the head-up display comprises a rotary reflecting mirror and an overturning support. The rotary reflecting mirror comprises a mirror body and rotating shafts located at the two opposite ends of the mirror body. The overturning support comprises a rotating matching element and a supporting seat used for installing the rotating matching element, the rotating matching element comprises a support matching part and a rotating shaft matching part, the rotating shaft matching part is installed in an inner hole of the support matching part in a sliding mode through an outer cylindrical surface, and the outer diameter surface of the support matching part is a spherical surface. The supporting seat is provided with a concave spherical surface in sliding fit with the bracket matching part; the rotating shaft is mounted in an inner hole of the rotating shaft matching part; the rotating reflector is used for rotating around the axis of the rotating shaft to change an optical path in the head-up display, and the rotating shaft matching part is used for rotating relative to the support matching part along with the rotating shaft when the rotating shaft rotates. According to the curved mirror supporting structure and the head-up display, the universality of the curved mirror supporting structure can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of head-up display, in particular, to a curved mirror support structure of head-up display and head-up display. BACKGROUND

[0002] Head-up display (Head Up Display, HUD for short) is gradually widely used in the field of automobile and other fields. The head-up display usually contains at least one mirror, which is used to reflect the image light emitted by the image source inside the head-up display to the projection medium, such as the front windshield glass of the automobile or the specially designed screen in the cockpit, so that the driver or the specific person's eyes can observe the target virtual image corresponding to the image light at a specific position after receiving the reflected light. The head-up display can project the speed, navigation and other important driving information in front of the driver for the driver to watch, which avoids the safety hazard caused by the driver looking down to watch the display information of the instrument or other driving auxiliary equipment, and increases the driving safety.

[0003] At present, the head-up display usually contains at least one rotating mirror which can rotate around the rotating shaft, which is used to change the imaging position of the target virtual image and match the eyebox range corresponding to the height and posture of different drivers. Therefore, the rotating mirror needs to be supported by the curved mirror support structure. The curved mirror support structure in the prior art has the disadvantages of complex structure, high precision requirement, and poor universality, which needs to be designed specifically for the rotating mirror in different models of head-up display.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information which does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0005] The purpose of the present disclosure is to provide a curved mirror support structure of head-up display and head-up display, which can improve the universality of the curved mirror support structure.

[0006] According to one aspect of the present disclosure, a curved mirror support structure of head-up display is provided, comprising:

[0007] The rotating mirror comprises a mirror body and rotating shafts located at opposite ends of the mirror body;

[0008] The flip bracket comprises a rotating matching element and a support seat for mounting the rotating matching element, the rotating matching element comprises a bracket matching part and a rotating shaft matching part, the rotating shaft matching part is slidingly mounted in the inner hole of the bracket matching part through the outer cylindrical surface, the outer diameter surface of the bracket matching part is spherical, the support seat has a concave spherical surface for slidingly cooperating with the bracket matching part, and the rotating shaft is mounted in the inner hole of the rotating shaft matching part;

[0009] The rotating mirror is configured to rotate around an axis of the rotation shaft to change a light path in the head-up display, and the rotation shaft matching portion is configured to rotate with the rotation shaft relative to the support matching portion when the rotation shaft rotates.

[0010] In an exemplary embodiment of the present disclosure, the end surface of the support seat is provided with a diameter-direction slot, and a width T of the slot satisfies T=B+m, where 2≤m≤3.

[0011] In an exemplary embodiment of the present disclosure, the slot is arranged on a side of the support seat close to the mirror body.

[0012] In an exemplary embodiment of the present disclosure, an included angle between the slot and a projection of the rotation shaft on the end surface of the support seat is not less than 60° and not more than 120°.

[0013] In an exemplary embodiment of the present disclosure, the mirror body and the support seat are further connected through an elastic element, and the elastic element is configured to apply an elastic force along a direction of the axis of the rotation shaft to the rotating mirror and the support seat.

[0014] In an exemplary embodiment of the present disclosure, the mirror body has a reflecting surface and a back portion away from the reflecting surface, the back portion is provided with a first hook, the support seat is provided with a second hook, the first hook and the second hook are provided with the elastic element, the flip support is arranged at opposite ends of the rotating mirror in pairs, including a first flip support and a second flip support, the first hook is arranged on a side of the back portion of the mirror body close to the first flip support, the second hook is arranged on the first flip support, the elastic element is a tension spring, and the tension spring is configured to pull the mirror body to the first flip support.

[0015] In an exemplary embodiment of the present disclosure, the first hook is arranged on the axis of the rotation shaft; or, the first hook is deviated from the axis of the rotation shaft, and a deviation angle is not more than 30°.

[0016] In an exemplary embodiment of the present disclosure, the elastic element is a torsion spring, and the elastic element is sleeved on the rotation shaft and configured to apply a torque around the axis of the rotation shaft to the rotating mirror and the support seat.

[0017] In an exemplary embodiment of the present disclosure, the rotation shaft is provided with a protruding crush rib, and the crush rib is in interference fit with an inner hole of the support matching portion.

[0018] According to another aspect of the present disclosure, a head-up display is provided, including:

[0019] The curved mirror support structure of the head-up display according to any one of the above;

[0020] A housing configured to mount the flip support;

[0021] A light source for generating and emitting image light rays;

[0022] A rotating mirror is used to deflect the image light rays, and the rotating mirror changes the optical path in the head-up display at different tilt angles to make the image light rays exit the head-up display at different angles.

[0023] The curved mirror support structure of the head-up display of the present disclosure, when the angle of the rotating mirror needs to be adjusted, on the one hand, since the rotating shaft matching part is slidingly installed in the inner hole of the support matching part through the outer cylindrical surface, the rotating shaft matching part can rotate with the rotating shaft relative to the support matching part, freeing the degree of freedom of rotation around the rotating shaft, allowing the rotating mirror to rotate around the axis, and transferring the friction between the rotating shaft and the support seat to the rotating shaft matching part and the support matching part, which is conducive to reducing the wear of the rotating shaft and the support seat; on the other hand, since the rotating matching element is slidingly matched by the outer spherical surface of the support matching part and the concave spherical inner hole of the support seat, the rotating matching element has a certain centering function relative to the support seat, that is, the support matching part also has a limited centering function in the direction perpendicular to the rotating shaft relative to the support seat, thereby being able to adapt to the deviation in the direction perpendicular to the axis, and improving the adaptability of the turnover support. In addition, since the angle of the axis of the rotating shaft matching part relative to the axis of the support seat can be adjusted, the requirement that the angle of the rotating shaft of the rotating mirror in different postures matches the inner hole of the rotating shaft matching part can be met, and left and right rotating shafts with opposite angles and orientations can also be adapted at the same time, so that the turnover supports at both ends can be unified and universal. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present disclosure and, together with the description, further serve to explain the principles of the present disclosure. It is apparent that the accompanying drawings for use in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor based on these drawings.

[0025] In order to better understand the present disclosure, reference can be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements can be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components can have different settings as known in the art. Furthermore, in the drawings, the same reference numerals represent the same or similar components in each drawing. Among them:

[0026] Figure 1 A schematic view of an exemplary embodiment of the curved mirror support structure of the head-up display of the present disclosure;

[0027] Figure 2FIG. 1 is a schematic diagram of a rotating mirror in an exemplary embodiment of a curved mirror support structure of a head-up display of the present disclosure;

[0028] Figure 3 FIG. 2 is a schematic diagram of a flip bracket, for example, a first flip bracket or a second flip bracket, in an exemplary embodiment of a curved mirror support structure of a head-up display of the present disclosure;

[0029] Figure 4 FIG. 3 is a schematic diagram of a flip bracket, for example, a first flip bracket or a second flip bracket, in an exemplary embodiment of a curved mirror support structure of a head-up display of the present disclosure;

[0030] Figure 5 FIG. 4 is a schematic diagram of a support seat in an exemplary embodiment of a curved mirror support structure of a head-up display of the present disclosure;

[0031] Figure 6 FIG. 5 is a schematic diagram of a rotating matching element being fitted into a support seat through a slot in an exemplary embodiment of a curved mirror support structure of a head-up display of the present disclosure;

[0032] Figure 7 FIG. 6 is a schematic diagram of an elastic element in an exemplary embodiment of a curved mirror support structure of a head-up display of the present disclosure.

[0033] The reference signs are explained as follows:

[0034] 1, rotating mirror; 11, mirror body; 111, reflecting surface; 12, limiting surface; 2, first flip bracket; 21, rotating matching element; 211, bracket matching part; 212, rotating shaft matching part; 22, support seat; 221, slot; 3, second flip bracket; 4, elastic element. DETAILED DESCRIPTION

[0035] The technical solutions in the example embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the example embodiments of the present disclosure. The example embodiments described herein are only for illustrative purposes, and are not intended to limit the protection scope of the present disclosure, and therefore it should be understood that various modifications and changes can be made to the example embodiments without departing from the protection scope of the present disclosure.

[0036] Unless otherwise defined or specified, the technical terms or scientific terms used in the present disclosure should be understood as the usual meaning understood by a person with ordinary skills in the art to which the present disclosure belongs. The present disclosure uses “first” and “second” and the like only as labels, and is not a limitation on the quantity or importance, order of the objects. The words “include” or “contain” and the like mean that the elements appearing before the words include the elements listed after the words and their equivalents, and do not exclude other elements.

[0037] In addition, in the present application, the orientation terms such as "up / down", "front / back", "left / right" and the like are merely used to represent relative positional relationships. For example, for the sake of convenience, the orientation is defined relative to the orientation in which the components are placed in the drawings, or is defined according to the position and state of the head-up display when it is actually working, i.e., according to the vehicle coordinate system. It should be understood that these directional terms are relative concepts, which can change accordingly according to the change in the orientation in which the components are placed in the drawings.

[0038] The head-up display is a device that can project image information onto a projection medium, such as a specially designed screen in front of the driver, a sun visor, a helmet in front of the driver, or a front windshield of a vehicle. In order to facilitate the explanation of the scheme of the present disclosure, a possible application scenario provided by the present disclosure is taken as an example, in which the head-up display is applied to a vehicle, and the windshield is taken as the projection medium. It should be understood by those skilled in the art that the head-up display of the exemplary embodiments of the present disclosure can also be applied to, for example, a sanitation vehicle, a fire vehicle, a military vehicle, and of course, can also be applied to the field of ships, aviation, etc. For example, it can be applied to an aircraft such as a fighter, so that the driver can track and aim at an object based on the assistance of the head-up display.

[0039] In order to facilitate the explanation of the scheme of the present disclosure, the working principle of the head-up display is first described exemplarily. The head-up display usually includes an image source and a light conditioning assembly. The image source is used to generate and project image light; the light conditioning assembly is used to adjust the image light, such as magnifying the image, correcting aberration, etc., and fold the image light to a human eye observation area, i.e., a driver eyebox range, to form a target virtual image that can be observed. The eyebox is the area in which the binoculars of the driver or observer are located. In the design of the head-up display, the eyebox range can be determined according to the height, posture, etc. of the driver. The eyebox defines an effective area of an eye point, and when the eye point position of the observer is in this effective area, the observer can see the target virtual image that meets the requirements.

[0040] Exemplarily, the image source can be a display imaging device, a virtual image or a real image formed by the display imaging device. For example, the display imaging device can include a liquid crystal screen, and the backlight source of the liquid crystal screen can include one or more of a laser, a light-emitting diode, an organic light-emitting diode, an excited fluorescent light-emitting material, and a quantum dot excitation light source; the display imaging device can also include a dot matrix screen composed of active light-emitting dots such as LED, MicroLED, OLED, and plasma light-emitting dots; or the display imaging device can also include a projection imaging system based on projection technologies such as Digital Light Processing (DLP), Liquid Crystal on Silicon (LCoS), and Liquid Crystal Display (LCD), driven by light sources such as LED, MicroLED, OLED, laser, and fluorescent light or a combination thereof, reflected or transmitted by a Digital Micromirror Display (DMD), LcoS, LCD, and other display panels, and then projected on a projection screen by a projection lens; the display imaging device can also include a laser beam scanning (LBS) projection imaging system in which a laser beam is scanned on a screen to form an image. All the display imaging devices described above can also be used as image sources through one or more times of refraction or reflection to form a real image or a virtual image.

[0041] Exemplarily, the light conditioning assembly includes a mirror, and can also include a lens or a waveguide and other optical elements. Exemplarily, the light conditioning assembly includes at least one mirror for magnifying the image projected by the image generating device, and the light conditioning assembly can be composed of a mirror, a lens, and an automobile windshield glass provided inside the head-up display. In an exemplary embodiment of the present disclosure, the head-up display includes a rotating mirror 1 which can rotate around its own axis under the drive of a mirror transmission system to change the optical path inside the head-up display, adjust the height of the virtual image formed by the head-up display, and match the height of the virtual image with the height, posture, and driving habit of the driver.

[0042] Exemplarily, the mirror drive system can include a driving motor and a transmission assembly, a transmission gear can be arranged on the non-optical surface of the mirror body 11, the transmission gear is in transmission connection with the transmission assembly, the transmission gear is driven by the driving motor to drive the rotating mirror 1 to rotate around the axis thereof. For example, taking the axis as the length direction of the mirror body 11, the transmission gear can be arranged at the bottom of the mirror body 11, i.e. at one end of the mirror body 11 in the width (height) direction, the transmission assembly can include a worm, the mirror body 11 is in meshing connection with the worm through the transmission gear, the worm is driven by the driving motor to rotate, the transmission gear is driven to move on the worm, and the rotating mirror 1 can be driven to rotate. Exemplarily, the transmission gear can be a local region of a gear, and the mirror drive system can also drive the rotating mirror 1 to rotate by using other movement modes, for example, the mirror drive system can also include a linear push rod motor, a gear and rack transmission mechanism, etc.

[0043] According to one aspect of the present disclosure, a curved mirror support structure of a head-up display is provided, comprising:

[0044] The rotating mirror 1 is in connection with the turnover bracket, the rotating mirror 1 includes a mirror body 11 and a rotating shaft at opposite ends of the mirror body 11; the turnover bracket includes a rotating matching element 21 and a support seat 22 for mounting the rotating matching element 21, the rotating matching element 21 includes a bracket matching part 211 and a rotating shaft matching part 212, the rotating shaft matching part 212 is slidingly mounted in the inner hole of the bracket matching part 211 through an outer cylindrical surface, the outer diameter surface of the bracket matching part 211 is a spherical surface, the support seat 22 has a concave spherical surface for slidingly matching with the bracket matching part 211, and the rotating shaft is mounted in the inner hole of the rotating shaft matching part 212. Wherein, the rotating mirror 1 is used for rotating around the axis where the rotating shaft is located to change the optical path in the head-up display, and the rotating shaft matching part 212 is used for rotating with the rotating shaft relative to the bracket matching part 211 when the rotating shaft rotates.

[0045] Reference is made to Figure 1 and Figure 2 , the rotating shafts at the opposite ends of the mirror body 11 constitute the axis of the rotating mirror 1, and the turnover bracket is used for providing the mounting position of the rotating shaft. For example, the head-up display includes a shell for accommodating the display imaging device and the rotating mirror 1, the turnover bracket is mounted in the shell and is fixed relative to the shell, the turnover bracket is arranged at opposite ends of the rotating mirror 1 in pairs, including a first turnover bracket 2 and a second turnover bracket 3, and the rotating shafts at the opposite ends of the mirror body 11 are matched with the first turnover bracket 2 and the second turnover bracket 3, respectively. In some embodiments, the turnover bracket can also be arranged at one end of the rotating mirror 1 separately and matched with the rotating shaft; the rotating shaft at the other end of the mirror body 11 can be directly matched with the shell of the head-up display.

[0046] Reference is made to Figure 3 , Figure 4 and Figure 5The schematic diagram of the support base 22 is shown. The rotating shaft is installed in the inner hole of the rotating shaft matching part 212. When the angle of the rotating mirror 1 needs to be adjusted, on the one hand, since the rotating shaft matching part 212 is slidingly installed in the inner hole of the support matching part 211 through the outer cylindrical surface, the rotating shaft matching part 212 can rotate relative to the support matching part 211, which releases the freedom of rotation around the rotating shaft, allows the rotating mirror 1 to rotate around the axis, and transfers the friction between the rotating shaft and the support base 22 to the friction between the rotating shaft matching part 212 and the support matching part 211, which is conducive to reducing the wear of the rotating shaft and the support base 22. On the other hand, since the rotating matching element 21 is slidingly matched with the concave spherical inner hole of the support base 22 through the outer spherical surface of the support matching part 211, the rotating matching element 21 has a certain centering function relative to the support base 22, that is, the support matching part 211 also has a limited centering function in the direction perpendicular to the rotating shaft relative to the support base 22, so as to adapt to the deviation in the direction perpendicular to the rotating shaft and improve the adaptability of the turnover support.

[0047] For ease of description, the whole vehicle coordinate system is taken as the reference, the X direction is parallel to the ground along the front-rear direction of the vehicle, the Z direction is perpendicular to the ground along the height direction of the vehicle, and the Y direction is perpendicular to both the X direction and the Z direction and along the left-right direction of the driver. Generally, the axis of the rotating mirror 1 is arranged along the Y direction. For example, in some embodiments, the axis of the rotating mirror 1 is parallel to the Y direction; in other embodiments, the axis of the rotating mirror 1 is arranged along the Y direction, and the axis of the rotating mirror 1 is not perpendicular to both the X direction and the Z direction, for example, has an angle less than 20° with both the X direction and the Z direction.

[0048] The inventor has also found that, for the development of head-up display products, different vehicle models have different windshield angles, driver eye point positions and imaging parameters, and correspondingly have different angles and postures of the rotating mirror 1, which leads to the fact that each product can only develop the corresponding turnover support to realize the rotation adjustment of the rotating mirror 1 in the working process. Since the angles and directions of the rotating shaft holes of the turnover supports at both ends of the rotating mirror 1 are opposite, they cannot be unified, that is, the left and right turnover supports of each model of head-up display product need to be developed respectively, which leads to a great increase in product development period and part cost and poor part universality. By using the curved mirror support structure provided in the present disclosure, since the angle of the axis of the rotating shaft matching part 212 relative to the axis of the support base 22 can be adjusted, the requirement that the angle of the rotating shaft of the rotating mirror 1 in different postures matches the inner hole of the rotating shaft matching part 212 can be met, and the left and right rotating shafts with opposite angles and directions of the rotating shaft holes can also be adapted, so that the turnover supports at both ends can be unified and universal.

[0049] Specifically, in an exemplary embodiment of the present disclosure, the rotating mirror 1 comprises a back plate. The mirror body 11 has a reflecting surface 111 and a back portion away from the reflecting surface 111. The mirror body 11 can comprise a reflecting body mounted on the back plate, such as a mirror made of metal, plastic or optical glass. The surface of the mirror is the reflecting surface 111, which can be a plane or a curved surface. The back plate can be made of metal or plastic material, which is beneficial to increase the strength and rigidity of the mirror body 11. The surface of the back plate away from the reflecting surface 111 is the back portion of the mirror body 11.

[0050] Exemplarily, the part of the rotating shaft for being mounted in the inner hole of the rotating shaft matching portion 212 is made of metal material. The rotating shaft is tightly matched with the inner hole of the rotating shaft matching portion 212 to drive the rotating shaft matching portion 212 to rotate relative to the support matching portion 211. Exemplarily, the rotating matching element 21 can also be made of metal material. The support matching portion 211 and the rotating shaft matching portion 212 are both made of metal material, such as spheroidal graphite cast iron, aluminum bronze, bearing alloy and the like. The contact surfaces of the support matching portion 211 and the rotating shaft matching portion 212 have the characteristics of smoothness and wear resistance, which can avoid failure due to wear in the long-term operation of the head-up display. At the same time, the larger size of the rotating mirror 1 is the development trend in the field of head-up display. The larger size of the rotating mirror 1 results in larger load of the turnover support and larger load of the mirror transmission system driving the rotating mirror 1 to rotate. The metal material of the support matching portion 211 and the rotating shaft matching portion 212 is beneficial to improve the carrying capacity of the turnover support and reduce the rotating resistance. Specifically, in an exemplary embodiment of the present disclosure, the back plate is also made of metal material. The rotating shaft is integrally formed with the back plate, such as integrally die-cast with the die-cast aluminum ADC12.

[0051] In an exemplary embodiment of the present disclosure, the width of the rotating matching element 21, i.e. the size along the axis of the rotating shaft, is 8-12 mm. The outer diameter of the rotating matching element 21, i.e. the outer diameter of the support matching portion 211, is 15-30 mm. In an exemplary embodiment, the diameter of the rotating shaft is 7-10 mm. The width of the rotating matching element 21 is 10 mm. The outer diameter of the rotating matching element 21, i.e. the outer diameter of the support matching portion 211, is 30 mm. It should be noted that the aforementioned “centering function within a limited range” of the present disclosure means that the centering function of the rotating matching element 21 relative to the support seat 22 is limited by the size of the outer spherical surface of the support matching portion 211 and the concave spherical surface of the support seat 22. The size parameters of the width and the outer diameter of the rotating matching element 21 can be determined by comprehensively considering the requirements of the centering range and the rationality of space arrangement and the like.

[0052] In one exemplary embodiment of this disclosure, the rotating shaft is provided with protruding crushing ribs, which are interference-fitted with the inner hole of the bracket matching part 211. For example, 6 to 8 crushing ribs are evenly distributed circumferentially on the rotating shaft. The area on the rotating shaft with crushing ribs is interference-fitted with the inner hole of the rotating shaft matching part 212, for example, with an interference amount of 0.2 mm. The area on the rotating shaft without crushing ribs is clearance-fitted or transition-fitted with the inner hole of the rotating shaft matching part 212. After the rotating shaft is installed into the inner hole of the rotating shaft matching part 212, on the one hand, it restricts the radial and axial movement of the rotating shaft matching part 212 relative to the rotating shaft and ensures that the rotating shaft matching part 212 rotates synchronously with the rotating shaft. On the other hand, the disassembly and assembly of the interference fit usually only affects the crushing ribs protruding from the rotating shaft body and is not likely to damage the rotating shaft body.

[0053] In one exemplary embodiment of this disclosure, reference is made to Figure 2 As shown, the rotating shaft also has a limiting surface 12 for engaging with the end face of the rotating shaft matching part 212 near the mirror body 11, so as to limit the axial movement of the rotating matching element 21 relative to the rotating shaft toward the mirror body 11.

[0054] In one exemplary embodiment of this disclosure, the end face of the support 22 is provided with a slot 221 in the diametrical direction. (See reference...) Figure 6 As shown, slot 221 facilitates the mounting of the rotating matching element 21 within the support base 22. Specifically, slot 221 facilitates the mounting of the outer spherical surface of the bracket matching part 211 within the concave spherical surface of the support base 22. For example, the width T of slot 221 and the width B of the rotating matching element 21 satisfy T = B + m, where 2 ≤ m ≤ 3. This allows for easier installation of the rotating matching element 21 within the support base 22, while also reducing the impact of slot 221 on the strength of the support base 22, thus avoiding the need for an excessively large support base 22 that would occupy a significant amount of space within the head-up display.

[0055] In one exemplary embodiment of this disclosure, the slot 221 is disposed on the side of the support base 22 near the mirror body 11. Simulation and experimental verification have shown that, compared with the other side (the side of the support base 22 away from the mirror body 11), the slot 221 being disposed on the side of the support base 22 near the mirror body 11 significantly reduces the weakening of the strength and rigidity of the support base 22.

[0056] In one exemplary embodiment of this disclosure, the angle of the slot 221 is related to the spatial angle of the rotating shaft. Specifically, the end face of the support 22 can be considered as the XZ plane. In some exemplary embodiments of this disclosure, as mentioned above, the axis of the rotating reflector 1 is generally set along the Y direction, and the axis of the rotating reflector 1 has the largest component in the Y direction, with an angle of less than 20° with both the X and Z directions. Therefore, the projection line segment of the rotating shaft on the end face of the support 22 can reflect the X and Z components of the axis of the rotating reflector 1, that is, reflect the spatial angle of the axis of the rotating reflector 1 in the vehicle coordinate system. For example, making the angle between the slot 221 and the projection of the rotating shaft on the end face of the support 22 not less than 60° and not greater than 120° helps to prevent the rotating matching element 21 from dislodging from the concave spherical surface of the support 22 during the operation of the head-up display. For example, in one exemplary embodiment, the slot 221 is perpendicular to the projection of the rotating shaft on the end face of the support 22.

[0057] In one exemplary embodiment of this disclosure, the mirror body 11 and the support base 22 are further connected by an elastic element 4, which applies an elastic force to the rotating mirror 1 and the support base 22 along the axis of rotation. (See reference...) Figure 7 The top view of the curved mirror support structure of the head-up display shown indicates that a first hook is provided on the back of the mirror body 11, and a second hook is provided on the support base 22. An elastic element 4 is provided between the first hook and the second hook. The elastic element 4 is used to apply an elastic force along the axis of rotation to the rotating mirror 1 and the support base 22. For example, the elastic element 4 is a tension spring, used to apply an elastic force that brings the rotating mirror 1 and the support base 22 closer together; for example, the elastic element 4 is a compression spring, used to apply an elastic force that pushes the rotating mirror 1 and the support base 22 away from each other. In some embodiments, the elastic element 4 can be a helical spring; in other embodiments, the elastic element 4 can also take other forms, as long as it can apply an elastic force along the axis of rotation to the rotating mirror 1 and the support base 22 through deformation.

[0058] For example, refer to Figure 7 As shown, the elastic element 4 is a tension spring. The first hook is located on the back of the mirror body 11 near the first flip bracket 2. That is, relative to the vertical center line on the mirror body 11 that is perpendicular to the axis of rotation, the first hook is located on the side of the vertical center line near the first flip bracket 2. The second hook is located on the first flip bracket 2. The elastic element 4 is used to pull the mirror body 11 toward the first flip bracket 2.

[0059] In an exemplary embodiment, the first hook is arranged on the axis of rotation, i.e., the elastic element 4 only has a component of elastic force parallel to the axis of rotation and a component of elastic force perpendicular to the direction of the reflecting surface 111, and does not have a component of elastic force parallel to the reflecting surface 111. As the mirror body 11 rotates, because the first hook is arranged on the axis of rotation and the second hook is arranged on the support seat 22 of the first flip bracket 2 which does not move, the length of the elastic element 4 does not change, and a stable pulling force is applied to the mirror body 11 to pull the mirror body 11 towards the first flip bracket 2. The elastic element 4 can eliminate the fitting gap between the rotating mirror 1 and the flip bracket due to dimensional tolerance, assembly error, etc., ensure the stability of the rotating mirror 1 during the operation of the head-up display, and avoid problems such as shaking and abnormal sound of the rotating mirror 1 due to the axial gap between the rotating mirror 1 and the flip bracket.

[0060] In an exemplary embodiment of the present disclosure, the first hook is offset from the axis of rotation. That is, the elastic element 4 not only has a component of elastic force parallel to the axis of rotation and a component of elastic force perpendicular to the direction of the reflecting surface 111, but also has a component of elastic force parallel to the reflecting surface 111. As the mirror body 11 rotates, because the first hook is offset from the axis of rotation, the length of the elastic element 4 changes with the different inclination angles of the mirror body 11. The elastic force of the elastic element 4 in the axial direction and the elastic force perpendicular to the direction of the reflecting surface 111 can eliminate the axial gap between the rotating mirror 1 and the flip bracket; and the component of elastic force of the elastic element 4 parallel to the reflecting surface 111 acts on the rotation direction of the rotating mirror 1, thereby eliminating the fitting gap between the mirror transmission system and the rotating mirror 1, reducing the transmission error, making the angle control of the rotating mirror 1 more accurate, and avoiding problems such as shaking and abnormal sound of the rotating mirror 1 due to the fitting gap between the rotating mirror 1 and the mirror transmission system.

[0061] Specifically, as described above, taking the example of the mirror transmission system driving the rotating mirror 1 to rotate through the worm rotation, the direction of the worm is along the thickness direction of the mirror body 11, i.e., generally along the X direction in the vehicle coordinate system. Due to factors such as design, manufacturing tolerance, and assembly error, the transmission gear on the mirror body 11 and the worm have a transmission gap, which easily affects the accuracy of the rotation angle of the rotating mirror 1 and can cause the problem of shaking of the rotating mirror 1. The exemplary embodiment of the present disclosure can not only eliminate the axial gap between the rotating mirror 1 and the flip bracket, but also eliminate the transmission gap between the mirror transmission system and the rotating mirror 1, achieving a one-stroke two-effect.

[0062] Exemplarily, the first hook deviates from the axis of the rotation shaft by an angle not greater than 30°, so that the cooperation gap between the mirror transmission system and the rotating mirror 1 can be eliminated by the out-of-axis elastic force component of the elastic element 4, and meanwhile, the out-of-axis elastic force component of the elastic element 4 can not excessively act on the load in the rotating direction of the rotating mirror 1, so that the driving assembly of the mirror transmission system can provide sufficient driving torque.

[0063] In an exemplary embodiment of the present disclosure, the elastic element 4 can also be a torsional spring for exerting a torque around the axis of the rotation shaft on the rotating mirror 1 and the support seat 22. For example, the torsional spring is sleeved on one side of the rotation shaft, for example, on the side of the rotation shaft for matching the first turnover bracket 2, one end of the torsional spring acts on the rotating mirror 1, and the other end acts on the first turnover bracket 2. Under the torque of the action force and the reaction force at the two ends of the torsional spring, the cooperation gap between the mirror transmission system and the rotating mirror 1 due to the size tolerance of the parts, assembly errors and the like can be eliminated, and the stability of the rotating mirror 1 during the operation of the head-up display is ensured, thereby ensuring the image stability of the projected virtual image of the head-up display.

[0064] According to another aspect of the present disclosure, a head-up display is provided, which comprises a housing, an image source, and the curved mirror support structure of the head-up display in any of the above exemplary embodiments or possible combinations. The image source is used to generate and emit image light, and the housing is used to mount the turnover bracket, and is also used to provide mounting positions and supports for all components inside the head-up display, such as display imaging devices, mirror transmission systems, etc., and is used to be mounted with the whole vehicle. The working principle, application scenarios, embodiments of the image source and the housing of the head-up display are described above and in related technologies, and will not be repeated here.

[0065] The head-up display of the present disclosure can rotate the rotating mirror 1 around the axis, and can adjust the angle of the rotating mirror 1, because the rotation matching element 21 has a certain centering function relative to the support seat 22, so it can adapt to the deviation in the vertical axis direction, improve the adaptability of the turnover bracket, and meet the needs of the rotation shaft angle of the rotating mirror 1 in different postures and the inner hole of the rotation matching element 21, and can simultaneously adapt to the left and right rotation shafts with opposite angles and orientations, so that the two ends of the turnover bracket can be unified and universal, which is beneficial to shorten the product development cycle and reduce the design, manufacturing and management costs of parts.

[0066] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. It is intended that the disclosure be construed as including any paterns of this disclosure that can be derived from the description and illustrations presented herein without departing from the scope and spirit of the disclosure. The specification and examples are exemplary only, with the true scope and spirit of the disclosure being indicated by the appended claims.

[0067] It is to be understood that the disclosure is not limited to the precise construction described above and shown in the attached drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the protection is limited only by the claims that follow.

Claims

1. A curved mirror support structure for a head-up display, characterized by, include: A rotating mirror (1) includes a mirror body (11) and rotating shafts located at opposite ends of the mirror body (11); A flip-up bracket includes a rotating matching element (21) and a support base (22) for mounting the rotating matching element (21). The rotating matching element (21) includes a bracket matching part (211) and a rotating shaft matching part (212). The rotating shaft matching part (212) is slidably mounted in the inner hole of the bracket matching part (211) through an outer cylindrical surface. The outer diameter surface of the bracket matching part (211) is spherical. The support base (22) has a concave spherical surface for slidingly engaging with the bracket matching part (211). The rotating shaft is mounted in the inner hole of the rotating shaft matching part (212). The rotating reflector (1) is used to rotate around the axis of the rotating shaft to change the light path in the head-up display, and the rotating shaft matching part (212) is used to rotate with the rotating shaft relative to the bracket matching part (211) when the rotating shaft rotates.

2. The curved mirror support structure for a head-up display according to claim 1, characterized by, The end face of the support base (22) is provided with a slot (221) in the diameter direction. The width T of the slot (221) and the width B of the rotating matching element (21) satisfy T=B+m, where 2≤m≤3.

3. The curved mirror support structure for a head-up display according to claim 2, characterized by The slot (221) is located on the side of the support (22) near the mirror body (11).

4. The curved mirror support structure for a head-up display according to claim 2, characterized by, The angle between the projection of the slot (221) and the shaft onto the end face of the support (22) is not less than 60° and not greater than 120°.

5. The curved mirror support structure for a head-up display according to claim 1, characterized by, The mirror body (11) and the support base (22) are also connected by an elastic element (4), which is used to apply an elastic force along the axis of rotation to the rotating mirror (1) and the support base (22).

6. The curved mirror support structure for a head-up display according to claim 5, characterized by The mirror body (11) has a reflective surface (111) and a back side away from the reflective surface (111). The back side is provided with a first hook, and the support base (22) is provided with a second hook. The elastic element (4) is provided between the first hook and the second hook. The flip brackets are arranged in pairs at opposite ends of the rotating reflector (1), including a first flip bracket (2) and a second flip bracket (3). The first hook is located on the back of the mirror body (11) near the first flip bracket (2), and the second hook is located on the first flip bracket (2). The elastic element (4) is a tension spring used to pull the mirror body (11) toward the first flip bracket (2).

7. The head-up display curved mirror support structure of claim 6, wherein, The first hook is located on the axis of the rotating shaft; or, the first hook is offset from the axis of the rotating shaft, and the offset angle is not greater than 30°.

8. The curved mirror support structure for a head-up display according to claim 5, characterized by, The elastic element (4) is a torsion spring. The elastic element (4) is sleeved on the rotating shaft and is used to apply torque around the axis of the rotating shaft to the rotating mirror (1) and the support base (22).

9. The curved mirror support structure for a head-up display according to any one of claims 1 to 8, characterized in that, The rotating shaft is provided with a protruding crushing rib, which is interference-fitted with the inner hole of the matching part (211) of the bracket.

10. A head-up display, characterized by include: The curved mirror support structure of the head-up display according to any one of claims 1 to 9; The outer casing is used to mount the flip-up bracket; a light source for generating and emitting image light rays; the rotating mirror (1) is used for deflecting the image light rays, the rotating mirror (1) changes the optical path in the head-up display at different tilt angles, so that the image light rays are emitted at different angles from the head-up display.

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