Push-pull type HUD transmission device and HUD system

Abstract

Provided in the present disclosure are a push-pull type HUD transmission device and an HUD system. The push-pull type HUD transmission device is configured to drive a curved mirror to rotate around a fixed axis. The push-pull type HUD transmission device comprises: a clamping mechanism, the clamping mechanism having a clamping space configured to clamp the curved mirror, wherein a clamped portion of the curved mirror is pressed against the clamping space; and a transmission mechanism, the transmission mechanism comprising a sliding structure, wherein the sliding structure is connected to the clamping mechanism, and the sliding structure is capable of driving the clamping mechanism to move in a first direction, so as to rotate the curved mirror around the fixed axis. The present disclosure solves the problem of an HUD transmission system being large in terms of volume, unstable in operation and difficult to assemble.

Description

HUD push-pull drive mechanism and HUD system

[0001] Cross-references to related applications

[0002] This disclosure claims priority to Chinese Patent Application No. 202420870455.8, filed on April 24, 2024, entitled "HUD Push-Pull Transmission Device and HUD System", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of vehicle display equipment technology, and more specifically, to a HUD push-pull transmission device and a HUD system. Background Technology

[0004] Currently, during the early evaluation of new models, OEMs face space constraints due to the large size of the HUD (Head-Up Display) drivetrain. This also complicates the design of other vehicle body data besides the HUD, prolongs development time, and may even lead to the sacrifice of other vehicle body data, increasing safety hazards. Furthermore, the drivetrain typically uses gears or worm gears. In gear drives, torsion springs eliminate backlash in the X-axis direction, but the motor may stall at higher positions, causing excessive pressure on the curved mirror and increasing the risk of mirror deformation. In worm gear drives, tension springs eliminate backlash in the X-axis direction, but the HUD assembly process involves more steps, significantly increasing time and labor costs.

[0005] In other words, HUD drive systems suffer from problems such as large size, unstable operation, and difficult assembly.

[0006] Summary of the Invention

[0007] The main objective of this disclosure is to provide a HUD push-pull drive device and HUD system to solve the problems of large size, unstable operation and difficult assembly of HUD drive systems.

[0008] To achieve the above objectives, according to one aspect of this disclosure, a HUD push-pull transmission device is provided, which is configured to drive a curved mirror to rotate about a fixed axis. The HUD push-pull transmission device includes: a clamping mechanism having a clamping space configured to clamp the curved mirror, wherein the clamped portion of the curved mirror is abutted within the clamping space; and a transmission mechanism including a sliding structure connected to the clamping mechanism, the sliding structure being capable of driving the clamping mechanism to move along a first direction to cause the curved mirror to rotate about the fixed axis.

[0009] Optionally, the clamping mechanism includes a resisting structure that provides a resisting force toward the clamping space so that the clamped part is stably connected within the clamping space.

[0010] Optionally, at least a portion of the abutment structure is made of an elastic material.

[0011] Optionally, the abutting structure includes a fixed section and an abutting section formed by sequential bending. The fixed section is connected to the sliding structure, and the abutting section is bent toward the clamping space and provides abutting top, which is configured to contact the clamped part.

[0012] Optionally, the clamping mechanism further includes a stop structure, which forms a clamping space with the abutting structure. The stop structure has a support portion on one side facing the clamping space, and the support portion is configured to support the clamped portion so that the abutting structure presses the clamped portion against the support portion.

[0013] Optionally, the stop structure and the abutment structure are arranged opposite to each other and spaced apart; and / or the stop structure is connected to the sliding structure.

[0014] Optionally, the support has an arcuate surface that bulges toward the clamping space.

[0015] Optionally, the stop structure also includes a stop base connected to the sliding structure, and a support portion is provided on the side of the stop base facing the clamping space.

[0016] Optionally, the contact position between the clamped part and the abutting structure forms a mating position, and the contact position between the clamped part and the supporting part forms an abutting position, wherein the distance between the mating position and the abutting position is less than the thickness of the clamped part.

[0017] Optionally, the distance between the abutment and the edge of the clamped part is greater than or equal to 3 mm.

[0018] Optionally, the transmission mechanism further includes: a fixed base having an installation space; a lead screw disposed within the installation space and extending along a first direction, with a sliding structure disposed on the lead screw; and a driving member drivingly connected to the lead screw to rotate the lead screw and drive the sliding structure to move.

[0019] Optionally, the transmission mechanism also includes a guide rail extending in the same direction as the lead screw, the guide rail passing through a sliding structure, and the sliding structure being able to slide along the guide rail.

[0020] Optionally, the guide rail is located on the side of the lead screw away from the curved mirror; and / or the drive is located outside the fixed base.

[0021] Optionally, the transmission mechanism also includes a shock absorber, which is fixed on a mounting base and located on one side of the drive component.

[0022] Optionally, the sliding structure has a receiving groove on the side facing the clamping mechanism for the clamped part to extend into, and the distance between the clamped part and the bottom of the receiving groove is greater than or equal to 1 mm.

[0023] Optionally, the sliding structure includes a sliding body, a first connecting part, and a second connecting part; the clamping mechanism includes a pushing structure and a stopping structure, and the clamping space is formed between the stopping structure and the pushing structure.

[0024] The first connecting part and the second connecting part are arranged in parallel and spaced apart. One end of the first connecting part is connected to the sliding body and the other end is connected to the abutting structure. One end of the second connecting part is connected to the sliding body and the other end is connected to the stop structure.

[0025] Optionally, the end of the first connecting portion away from the sliding body is higher than the end of the second connecting portion away from the sliding body.

[0026] Optionally, the sliding body, the first connecting portion, and the second connecting portion together form a U-shaped structure and together form a receiving groove into which the clamped portion extends.

[0027] According to another aspect of this disclosure, a HUD system is provided, including a curved mirror and the aforementioned HUD push-pull transmission device, wherein the clamped portion of the curved mirror is abutted within the clamping space.

[0028] Using the technical solution of this disclosure, the HUD push-pull transmission device is configured to drive a curved mirror to rotate around a fixed axis. The HUD push-pull transmission device includes a clamping mechanism and a transmission mechanism. The clamping mechanism has a clamping space configured to clamp the curved mirror, and the clamped part of the curved mirror is pressed against the clamping space. The transmission mechanism includes a sliding structure, which is connected to the clamping mechanism. The sliding structure can drive the clamping mechanism to move along a first direction so that the curved mirror rotates around the fixed axis.

[0029] By providing a clamping space through a clamping mechanism, the clamped portion of the curved mirror is held against the clamping space. This eliminates the gap between the clamped portion and the HUD push-pull transmission device during transmission in the first direction, eliminating the need for external force to eliminate the gap and ensuring precise gear shifting. It also optimizes the processing and assembly process, reducing production costs. A sliding structure drives the clamping mechanism to move along the first direction, thereby rotating the curved mirror. The sliding process is smooth and jam-free, ensuring precise transmission while avoiding excessive pressure on the curved mirror that could cause deformation. Attached Figure Description

[0030] The accompanying drawings, which form part of this disclosure, are used to provide a further understanding of this disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain this disclosure and do not constitute an undue limitation of this disclosure. In the drawings:

[0031] Figure 1 shows a schematic diagram of the structure of a HUD system in an initial state according to an optional embodiment of the present disclosure;

[0032] Figure 2 shows an enlarged schematic diagram of part A in Figure 1;

[0033] Figure 3 shows a schematic diagram of the HUD system in Figure 1 when the curved mirror is in the first state;

[0034] Figure 4 shows a schematic diagram of the HUD system in Figure 1 when the curved mirror is in the second state;

[0035] Figure 5 shows a schematic diagram of the curved mirror and limit switch of an optional embodiment of the HUD system of this disclosure when they are in the contact position;

[0036] Figure 6 shows a schematic diagram of the limit switch and anti-vibration block of an optional embodiment of the HUD system disclosed herein.

[0037] The above-mentioned figures include the following reference numerals: 10, clamping mechanism; 11, abutting structure; 111, fixed section; 112, abutting section; 113, abutting top; 12, stop structure; 121, support part; 1211, arc-shaped surface; 122, stop base; 13, clamping space; 20, transmission mechanism; 21, sliding structure; 211, receiving groove; 212, sliding body; 213, first connecting part; 214, second connecting part; 22, fixed seat; 23, lead screw; 24, driving component; 25, guide rail; 26, anti-vibration block; 30, curved mirror; 31, clamped part; 32, fixed shaft; 40, limit switch. Detailed Implementation

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] It should be noted that, unless otherwise specified, all technical and scientific terms used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains.

[0040] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this disclosure.

[0041] To address the issues of large size, unstable operation, and difficult assembly of HUD drive systems, this disclosure provides a push-pull drive device and a HUD system.

[0042] As shown in Figures 1 to 5, the HUD push-pull transmission device is configured to drive the curved mirror 30 to rotate around a fixed axis 32. The HUD push-pull transmission device includes a clamping mechanism 10 and a transmission mechanism 20. The clamping mechanism 10 has a clamping space 13 configured to clamp the curved mirror 30, and the clamped part 31 of the curved mirror 30 is pressed against the clamping space 13. The transmission mechanism 20 includes a sliding structure 21, which is connected to the clamping mechanism 10. The sliding structure 21 can drive the clamping mechanism 10 to move along a first direction, so that the curved mirror 30 rotates around the fixed axis 32. The first direction is shown as the X-axis direction in Figure 2. The sliding structure 21 can drive the clamping mechanism 10 to move back and forth in the X-axis direction.

[0043] By providing a clamping space 13 through a clamping mechanism 10, the clamped portion 31 of the curved mirror 30 is pressed against the clamping space 13. This eliminates the gap between the clamped portion 31 and the HUD push-pull transmission device during transmission in the first direction, eliminating the need for external force to eliminate the gap and ensuring precise gear shifting. It also optimizes the processing and assembly process, reducing production costs. The sliding structure 21 drives the clamping mechanism 10 to move along the first direction, thereby rotating the curved mirror 30. The sliding process is smooth and without jamming, ensuring precise transmission while avoiding excessive pressure on the curved mirror 30 that could cause deformation.

[0044] Figures 3 and 4 show schematic diagrams of the curved mirror 30 after rotating clockwise and counterclockwise relative to the initial state in Figure 1, respectively. As shown in Figure 3, when the sliding structure 21 moves to the left, it causes the curved mirror 30 to rotate clockwise. As shown in Figure 4, when the sliding structure 21 moves to the right, it causes the curved mirror 30 to rotate counterclockwise.

[0045] Optionally, the clamping mechanism 10 includes a resisting structure 11 connected to the sliding structure. The resisting structure 11 provides a resisting force toward the clamping space 13 to stably connect the clamped part 31 within the clamping space 13. By resisting the clamped part 31 with the resisting structure 11, it is ensured that there is no gap between the clamped part 31 and the clamping mechanism 10 in the first direction, thus ensuring that the clamped part 31 is stably connected within the clamping space 13.

[0046] Optionally, at least a portion of the abutting structure 11 is made of an elastic material. The elastic material continuously provides abutting force against the clamped portion 31, ensuring stable connection throughout the transmission process.

[0047] Optionally, the abutting structure 11 includes a fixed section 111 and an abutting section 112 formed by sequential bending, wherein the fixed section 111 and the abutting section 112 are connected to form an inverted V-shaped structure. The fixed section 111 is connected to the sliding structure 21, and the abutting section 112 is bent toward the clamping space 13 and provides an abutting top 113, which is configured to contact the clamped part 31. By setting a fixed section 111 to ensure a stable connection with the sliding structure 21, and at the same time, the abutting section 112 bends into the clamping space 13 so that the abutting top 113 on it contacts the clamped part 31. When the sliding structure 21 drives the clamping mechanism 10 to move along the first direction, the abutting structure 11 drives the curved mirror 30 to rotate. The abutting section 112 interferes with the curved mirror 30 to eliminate the gap. The angle between the abutting section 112 and the fixed section 111 changes. When the position of the curved mirror 30 remains unchanged, the angle between the abutting section 112 and the fixed section 111 will not change. The abutting structure 11 can continuously provide the same abutting force, thereby preventing the curved mirror 30 from shaking.

[0048] Optionally, the fixed section 111 is fixed to the sliding structure 21 with screws.

[0049] Optionally, the clamping mechanism 10 may further include a stop structure 12, forming a clamping space 13 between the stop structure 12 and the abutment structure 11. The stop structure 12 has a support portion 121 on the side facing the clamping space 13. The support portion 121 is configured to support the clamped portion 31, so that the abutment structure 11 presses the clamped portion 31 against the support portion 121. By pressing the clamped portion 31 against the support portion 121 on the stop structure 12, the clamped portion 31 is stably connected in the clamping space 13. When the curved mirror 30 is driven to a set tilt angle, the support portion 121 pushes or presses against the clamped portion 31, stabilizing the position of the curved mirror 30 and ensuring that it does not wobble.

[0050] Optionally, the stop structure 12 and the abutment structure 11 are arranged opposite to each other and spaced apart to form a clamping space 13, which is connected on both sides of the clamped part 31 respectively, and the two sides are stably connected during the movement in the first direction to ensure that the clamped part 31 is clamped.

[0051] Optionally, the stop structure 12 is connected to the sliding structure 21. This arrangement ensures that the relative position between the stop structure 12 and the abutment structure 11 remains constant, preventing changes in the relative position during transmission from affecting the rotation control of the curved mirror 30 and ensuring precise transmission gears.

[0052] Optionally, the support portion 121 has an arcuate surface 1211 that protrudes toward the clamping space 13, which avoids damage to the clamped portion 31.

[0053] Optionally, the stop structure 12 further includes a stop base 122, which is connected to the sliding structure 21, and the support portion 121 is disposed on the side of the stop base 122 facing the clamping space 13. The stable connection between the stop base 122 and the sliding structure 21 ensures the stability of the position of the support portion 121, so as to continuously provide pressure and thrust.

[0054] Optionally, the stop base 122 is fixed to the sliding structure 21 with screws.

[0055] Optionally, the contact position between the clamped part 31 and the abutting structure 11 forms a mating position, and the contact position between the clamped part 31 and the supporting part 121 forms an abutting position. The distance between the mating position and the abutting position is less than the thickness of the clamped part 31. This ensures that the abutting structure 11 and the stop structure 12 are always in contact with the clamped part 31 during transmission, ensuring stable and accurate transmission.

[0056] Optionally, the distance between the abutment position and the edge of the clamped part 31 is greater than or equal to 3mm. This effectively prevents the clamped part 31 from coming out of the mating position and the abutment position, ensuring a stable connection.

[0057] Optionally, the transmission mechanism 20 may further include a fixed base 22, a lead screw 23, and a driving member 24. The fixed base 22 has an installation space and is generally U-shaped. The lead screw 23 is disposed within the installation space and extends along a first direction, and a sliding structure 21 is disposed on the lead screw 23. The two ends of the lead screw 23 can be movably inserted into opposite ends of the fixed base 22. The driving member 24 is driven by the lead screw 23, causing the lead screw 23 to rotate and thus move the sliding structure 21. By driving the lead screw 23 to rotate via the driving member 24, and the rotation of the lead screw 23 moving the sliding structure 21, the clamped part 31 can be smoothly moved, thereby controlling the rotation of the curved mirror 30 around the fixed axis 32. The transmission process is smooth, stable, and highly accurate. Optionally, the driving member 24 is a rotary motor.

[0058] Optionally, the transmission mechanism 20 may further include a guide rail 25 extending in the same direction as the lead screw 23. The guide rail 25 is parallel to the lead screw 23, and its two ends are respectively fixedly connected to opposite ends of the fixed base 22. The guide rail 25 may be a smooth rod. The guide rail 25 passes through the sliding structure 21, which can slide along the guide rail 25. The guide rail 25 further improves the stability of the sliding structure 21's movement.

[0059] Optionally, the guide rail 25 is located on the side of the lead screw 23 away from the curved mirror 30, which makes it easier for the lead screw 23 to drive the sliding structure 21 with less effort. At the same time, the guide rail 25 on the side of the sliding structure 21 away from the curved mirror 30 prevents the sliding structure 21 from wobbling in the second direction, where the second direction is perpendicular to the first direction, such as the Y-axis direction in the figure.

[0060] Optionally, the drive component 24 is located outside the fixed base 22 to avoid the drive component 24 obstructing the movement of the curved mirror 30 and the sliding structure 21.

[0061] Optionally, the transmission mechanism 20 may further include a shock absorber 26, which is fixed on the mounting base 22 and located on one side of the drive member 24. This tilts the center of gravity towards the drive member 24, compensating for the eccentric position, reducing resonance, and significantly reducing overall machine noise. Optionally, referring to Figure 6, there are two shock absorbers 26, located on opposite sides of the drive member 24, i.e., the drive member 24 is positioned between the two shock absorbers 26. This further enhances the resonance reduction effect, compensates for the eccentric position, and significantly reduces overall machine noise.

[0062] Optionally, the sliding structure 21 has a receiving groove 211 on the side facing the clamping mechanism 10 for the clamped part 31 to extend into. The distance between the clamped part 31 and the bottom of the receiving groove 211 is greater than or equal to 1 mm, so as to avoid the clamped part 31 touching the bottom of the receiving groove 211 and affecting the rotation of the curved mirror 30, and ensuring the stability and accuracy of the transmission process.

[0063] Optionally, a clamping space 13 is formed between the stop structure 12 and the abutment structure 11. The sliding structure 21 may include a sliding body 212, a first connecting portion 213, and a second connecting portion 214. The first connecting portion 213 and the second connecting portion 214 are arranged parallel and spaced apart. One end of the first connecting portion 213 is connected to the sliding body 212, and the other end is connected to the abutment structure 11. One end of the second connecting portion 214 is connected to the sliding body 212, and the other end is connected to the stop structure 12. This ensures the installation of the abutment structure 11 and the stop structure 12 to form the clamping space 13.

[0064] Optionally, the end of the first connecting portion 213 away from the sliding body 212 is higher than the end of the second connecting portion 214 away from the sliding body 212. In an optional embodiment, the first connecting portion 213 is connected to the fixed section 111, and the second connecting portion 214 is connected to the stop base 122. By setting the end of the first connecting portion 213 away from the sliding body 212 to be higher than the end of the second connecting portion 214 away from the sliding body 212, it is easier to set the fixed section 111 and the abutting section 112, and sufficient setting space is reserved for the stop base 122 so that the abutting section 112 and the support portion 121 can clamp the clamped portion 31.

[0065] Optionally, the sliding body 212, the first connecting part 213, and the second connecting part 214 together form a U-shaped structure and together form a receiving groove 211 into which the clamped part 31 extends. By providing the receiving groove 211, it is easy for the clamped part 31 to extend in, ensuring the rotation effect of the curved mirror 30 and ensuring the stability and accuracy of the transmission process.

[0066] This disclosure also provides a HUD system, including a curved mirror 30 and the aforementioned HUD push-pull transmission device. The HUD push-pull transmission device is located below the curved mirror 30, i.e., at the bottom of the HUD system, reducing the size and volume of the HUD system in the XYZ directions, significantly reducing the difficulty and time required for preliminary research, and without compromising the surface shape of the curved mirror 30. The HUD push-pull transmission device and the clamping part 31 of the curved mirror 30 have no gap in the X-axis direction (first direction), eliminating the need for external force to eliminate gaps, simplifying the installation process, reducing costs, and enhancing the imaging accuracy and stability of the HUD system itself.

[0067] Optionally, the HUD system also includes a limit switch 40, and the transmission stops when the curved mirror 30 rotates to contact the limit switch 40.

[0068] By applying the technical solution disclosed herein, the following technical effects are achieved:

[0069] 1. By setting up a clamping mechanism 10 to provide a clamping space 13, the clamped part 31 of the curved mirror 30 is pressed against the clamping space 13. In the first direction, the gap between the clamped part 31 and the HUD push-pull transmission device during the transmission process is eliminated. There is no need to use external force to eliminate the gap, which ensures the accuracy of gear transmission. At the same time, the processing and assembly process is optimized and the production cost is reduced.

[0070] 2. The sliding structure 21 drives the clamping mechanism 10 to move along the first direction, thereby driving the curved mirror 30 to rotate. The sliding process is smooth and without jamming. The transmission is precise while avoiding excessive pressure on the curved mirror 30, which could cause it to deform.

[0071] 3. The HUD push-pull transmission device is located below the curved mirror 30, which is the bottom of the HUD system. This reduces the size and volume of the HUD system in the XYZ direction, greatly reducing the difficulty and time of pre-research, and at the same time, it does not burden the surface shape of the curved mirror 30.

[0072] Obviously, the embodiments described above are merely some, not all, of the embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort should fall within the scope of protection of this disclosure.

[0073] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0074] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in sequences other than those illustrated or described herein.

[0075] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure. Industrial applicability

[0076] By providing a clamping space through a clamping mechanism, the clamped portion of the curved mirror is held against the clamping space. This eliminates the gap between the clamped portion and the HUD push-pull transmission device during transmission in the first direction, eliminating the need for external force to eliminate the gap and ensuring precise gear shifting. It also optimizes the machining and assembly process, reducing production costs. A sliding structure drives the clamping mechanism to move along the first direction, thereby rotating the curved mirror. The sliding process is smooth and jam-free, ensuring precise transmission while avoiding excessive pressure on the curved mirror that could cause deformation.

Claims

1. A HUD push-pull transmission device, characterized in that, The HUD push-pull transmission device is configured to drive the curved mirror (30) to rotate around the fixed axis (32). The HUD push-pull transmission device includes: A clamping mechanism (10) having a clamping space (13) configured to clamp the curved mirror (30), wherein the clamped portion (31) of the curved mirror (30) is abutted against the clamping space (13); The transmission mechanism (20) includes a sliding structure (21) connected to the clamping mechanism (10). The sliding structure (21) can drive the clamping mechanism (10) to move along a first direction so that the curved mirror (30) rotates around the fixed axis (32).

2. The HUD push-pull transmission device according to claim 1, characterized in that, The clamping mechanism (10) includes a resisting structure (11) connected to the sliding structure (21). The resisting structure (11) can provide a resisting force toward the clamping space (13) so that the clamped part (31) is stably connected in the clamping space (13).

3. The HUD push-pull transmission device according to claim 2, characterized in that, At least a portion of the abutment structure (11) is made of an elastic material.

4. The HUD push-pull transmission device according to claim 2 or 3, characterized in that, The abutting structure (11) includes a fixed section (111) and an abutting section (112) formed by sequential bending. The fixed section (111) is connected to the sliding structure (21), and the abutting section (112) is bent toward the clamping space (13) and provides an abutting top (113). The abutting top (113) is configured to contact the clamped part (31).

5. The HUD push-pull transmission device according to claim 2, characterized in that, The clamping mechanism (10) further includes a stop structure (12), which forms the clamping space (13) between the stop structure (12) and the abutment structure (11). The stop structure (12) provides a support portion (121) on one side facing the clamping space (13). The support portion (121) is configured to support the clamped portion (31) so that the abutment structure (11) presses the clamped portion (31) against the support portion (121).

6. The HUD push-pull transmission device according to claim 5, characterized in that, The stop structure (12) and the abutment structure (11) are opposite to each other and spaced apart; and / or The stop structure (12) is connected to the sliding structure (21).

7. The HUD push-pull transmission device according to claim 5 or 6, characterized in that, The support (121) has an arcuate surface (1211) that protrudes toward the clamping space (13).

8. The HUD push-pull transmission device according to any one of claims 5-7, characterized in that, The stop structure (12) further includes a stop base (122), which is connected to the sliding structure (21), and the support (121) is disposed on the side of the stop base (122) facing the clamping space (13).

9. The HUD push-pull transmission device according to any one of claims 5-8, characterized in that, The contact position between the clamped part (31) and the abutting structure (11) forms a mating position, and the contact position between the clamped part (31) and the supporting part (121) forms an abutting position. The distance between the mating position and the abutting position is less than the thickness of the clamped part (31).

10. The HUD push-pull transmission device according to claim 9, characterized in that, The distance between the abutment position and the edge of the clamped part (31) is greater than or equal to 3 mm.

11. The HUD push-pull transmission device according to any one of claims 1 to 10, characterized in that, The transmission mechanism (20) also includes: A mounting base (22) having an installation space; A lead screw (23) is disposed within the installation space and extends along the first direction, and a sliding structure (21) is disposed on the lead screw (23); A drive member (24) is driven to connect with the lead screw (23) so that the lead screw (23) rotates to drive the sliding structure (21) to move.

12. The HUD push-pull transmission device according to claim 11, characterized in that, The transmission mechanism (20) also includes a guide rail (25) extending in the same direction as the lead screw (23), the guide rail (25) passing through the sliding structure (21), the sliding structure (21) being able to slide along the guide rail (25).

13. The HUD push-pull transmission device according to claim 12, characterized in that, The guide rail (25) is located on the side of the lead screw (23) away from the curved mirror (30); and / or, The drive unit (24) is located outside the fixed base (22).

14. The HUD push-pull transmission device according to any one of claims 11-13, characterized in that, The transmission mechanism (20) also includes a shock absorber (26), which is fixed on the fixed base (22) and is located on one side of the drive member (24).

15. The HUD push-pull transmission device according to any one of claims 1 to 14, characterized in that, The sliding structure (21) has a receiving groove (211) on the side facing the clamping mechanism (10) into which the clamped part (31) extends, and the distance between the clamped part (31) and the bottom of the receiving groove (211) is greater than or equal to 1 mm.

16. The HUD push-pull transmission device according to any one of claims 1 to 15, characterized in that, The sliding structure (21) includes a sliding body (212), a first connecting part (213) and a second connecting part (214); the clamping mechanism (10) includes a pushing structure (11) and a stop structure (12), and the clamping space (13) is formed between the stop structure (12) and the pushing structure (11); The first connecting part (213) and the second connecting part (214) are arranged in parallel and spaced apart. One end of the first connecting part (213) is connected to the sliding body (212) and the other end is connected to the abutting structure (11). One end of the second connecting part (214) is connected to the sliding body (212) and the other end is connected to the stop structure (12).

17. The HUD push-pull transmission device according to claim 16, characterized in that, The end of the first connecting portion (213) away from the sliding body (212) is higher than the end of the second connecting portion (214) away from the sliding body (212).

18. The HUD push-pull transmission device according to claim 16, characterized in that, The sliding body (212), the first connecting part (213) and the second connecting part (214) together form a U-shaped structure and together form a receiving groove (211) into which the clamped part (31) extends.

19. A HUD system, characterized in that, The device includes a curved mirror (30) and a HUD push-pull transmission device according to any one of claims 1 to 18, wherein the clamped portion (31) of the curved mirror (30) is abutted within the clamping space (13).

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