A HUD

Abstract

The utility model discloses a HUD, include: lens drive frame, motor support, first gear, torsional spring, the bottom of lens drive frame is equipped with arc rack, the side of lens drive frame is equipped with the protruding limiting portion, motor support includes the first installation surface and the second installation surface of opposite setting, and the first installation surface is fixed with drive motor, and the second installation surface is equipped with the locating post, and the drive shaft of drive motor is connected with first gear, and first gear is engaged with arc rack up and down to drive lens drive frame around rotation, torsional spring includes elastic main part, first elastic section, second elastic section, and elastic main part is covered in the locating post, and first elastic section is butt joint with limiting portion, and second elastic section is butt joint with second installation surface, the utility model embodiment utilizes torsional spring to provide the elastic damping force opposite with the driving force of drive motor, makes drive motor more smooth when adjusting the installation angle of curved mirror.

Description

Technical Field

[0001] This utility model relates to the field of HUD technology, and in particular to a HUD. Background Technology

[0002] In the automotive industry, HUD (Head-Up Display) is used to project vehicle information such as speed, RPM, and coolant temperature onto the windshield.

[0003] HUD consists of a curved mirror and a housing. The curved mirror is installed inside the housing. During installation, the installation angle of the curved mirror must be adjustable. Damping is required during the adjustment of the installation angle of the curved mirror. The purpose of this damping is to make the curved mirror move more smoothly when adjusting the installation angle, reduce the noise generated by the mutual impact between moving parts during motor drive, and prevent the image projected by the HUD from shaking due to vehicle vibration.

[0004] Existing methods typically require custom-designed motors with damping structures to control the motor's driving force using the elastic damping force of the damping structure. However, the damping structure of these motors is complex and expensive, making the cost of HUDs too high. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the damping mechanism in the existing motor for adjusting the installation angle of the curved mirror is too complex and expensive, thus increasing the cost of the HUD. This invention provides a HUD that, by optimizing the existing structure for adjusting the installation angle of the curved mirror, can achieve damped control of the curved mirror and reduce the cost of the HUD.

[0006] To solve the above-mentioned technical problems, an embodiment of this utility model discloses a HUD, comprising:

[0007] A lens drive frame for mounting lenses extends along a first direction. Along the first direction, the bottom of the lens drive frame is provided with an arc-shaped rack. The lens drive frame also includes a side side located on one side of the lens drive frame in a second direction. The side side is provided with a limiting portion protruding along the second direction.

[0008] The motor bracket, along the first direction, includes a first mounting surface and a second mounting surface disposed opposite to each other. A drive motor is fixed on the first mounting surface, and a positioning post is provided on the second mounting surface. The drive shaft of the drive motor is disposed on the second mounting surface and extends along the second direction.

[0009] A first gear is sleeved on the drive shaft. The first gear and the positioning post are spaced apart along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. Along the first direction, the first gear is located below the arc-shaped rack and meshes with the arc-shaped rack to drive the lens drive frame to rotate around the second direction.

[0010] A torsion spring includes an elastic body, a first elastic segment, and a second elastic segment. The elastic body is sleeved on the positioning post. The first elastic segment abuts against the limiting part, and the second elastic segment abuts against the second mounting surface.

[0011] By adopting the above technical solution, this utility model embodiment uses a conventional drive motor to drive the lens drive frame to rotate, and at the same time uses a torsion spring to provide an elastic damping force opposite to the driving force of the drive motor, making the drive motor adjust the installation angle of the curved mirror more smoothly, reducing the noise generated by the mutual impact between moving parts in the structure, and also avoiding the phenomenon of shaking of the HUD projected image due to vehicle vibration.

[0012] Specifically, a lens drive frame with an arc-shaped rack is used to connect the curved mirror in the HUD that requires angle adjustment to the lens drive frame. A motor bracket is used to fix the drive motor, which controls the rotation of the first gear. The engagement of the first gear with the arc-shaped rack of the lens drive frame causes the lens drive frame to rotate around the extension direction of the drive motor's drive shaft (i.e., the aforementioned second direction). This allows the drive motor to control the rotation of the curved mirror to adjust its angle. Furthermore, a torsion spring is used, with its elastic body fitted onto the positioning post of the motor bracket. The first elastic segment of the torsion spring abuts against the limiting part on the lens drive frame, and the second elastic segment is fixed to the motor bracket. This results in the lens drive frame being subjected to an elastic damping force opposite to the driving force of the drive motor.

[0013] In this system, the drive motor controls the first gear to rotate forward or backward, and the torsion spring can provide an elastic damping force opposite to the driving force of the drive motor.

[0014] The drive motor controls the rotation of the first gear, causing the arc-shaped rack to move left or right, thereby rotating the first lens along the X-axis and allowing the first lens to be installed in the housing at different angles. Specifically, when the drive motor controls the first gear to rotate forward, the lens drive frame is lifted upward, and the right end of the limiting part presses down the first elastic segment of the torsion spring, causing the lens drive frame to be lifted upward with damping. When the drive motor controls the first gear to rotate in reverse, the lens drive frame moves downward, and the left end of the limiting part presses down the first elastic segment of the torsion spring, causing the lens drive frame to move downward with damping. This achieves damped adjustment of the installation angle of the first lens (the installation angle being the angle between the mirror surface of the first lens and the bottom wall of the housing), while also reducing noise generated by the mutual impact between moving parts during motor drive and preventing image jitter caused by vehicle vibration.

[0015] It is understood that the aforementioned torsion spring is in a compressed state when installed between the lens drive frame and the motor bracket, allowing the torsion spring to provide elastic force. It is also understood that the smaller the angle between the first and second elastic segments of the torsion spring, the greater the elastic force it can provide. The specific selection of the torsion spring, or the size of the angle between the first and second elastic segments, can be adaptively selected based on parameters such as the weight of the actual lens drive frame and the curved mirror. This embodiment of the invention does not impose specific limitations in this regard.

[0016] According to another specific embodiment of the present invention, the limiting part includes an arc surface, which abuts against the first elastic segment.

[0017] Using the above technical solution, the limiting part includes an arc surface, allowing the first elastic segment to abut against the arc surface, ensuring linear contact between the first elastic segment and the limiting part. Furthermore, the arc surface ensures linear contact between the first elastic segment and the limiting part regardless of the rotation angle of the lens drive frame. Additionally, by adjusting the curvature of the arc surface, the angle between the first and second elastic segments can be kept equal regardless of the rotation angle of the lens drive frame, thus enabling the torsion spring to provide equal elastic damping force. The specific curvature of this arc surface needs to be adjusted adaptively according to the curvature of the arc-shaped gear of the lens drive frame; this embodiment of the invention does not impose a specific limitation on this.

[0018] According to another specific embodiment of the present invention, it further includes a first limiting plate disposed on the second mounting surface along the third direction, the positioning post being located between the first limiting plate and the first gear, and the second elastic segment abutting against the first limiting plate.

[0019] Using the above technical solution, a first limiting plate is set to fix the position of the second elastic segment on the motor bracket.

[0020] For example, a limiting hole can be provided on the first limiting plate so that the end of the second elastic segment can be hooked with the limiting hole. Alternatively, the end of the second elastic segment can be shaped like a hook so that it can be hooked with the first limiting plate.

[0021] According to another specific embodiment of the present invention, it further includes a second limiting plate, which protrudes from the second mounting surface along the second direction; along the first direction, the second limiting plate is located above the positioning post; along the second direction, the first elastic segment is located between the second limiting plate and the second mounting surface.

[0022] By adopting the above technical solution, a second limiting plate is set on the second mounting surface of the motor bracket to limit the position of the first elastic segment in the second direction, so as to prevent the second elastic segment from moving along the second direction and failing to abut against the limiting part, thereby affecting the damping effect of the torsion spring on the lens drive frame.

[0023] For example, the second limiting plate can be configured as an L-shaped limiting plate, wherein one end is connected to the second mounting surface and the other end is parallel to the second mounting surface, thereby restricting the second elastic segment between the second mounting surface and the second limiting plate.

[0024] According to another specific embodiment of the present invention, the teeth of the first gear and the teeth of the arc-shaped rack have radial clearance and circumferential clearance.

[0025] Using the above technical solution, radial clearance refers to the clearance after meshing in the length direction of the teeth, and circumferential clearance refers to the clearance after meshing in the width direction of the teeth. The clearance in different directions helps to prevent the teeth of the lens drive frame and the teeth of the first gear from jamming, thus preventing the lens drive frame from rotating.

[0026] According to another specific embodiment of the present invention, the lens drive frame is provided with a countersunk hole, and the limiting part is inserted into the countersunk hole.

[0027] By adopting the above technical solution, countersunk holes are provided on the lens drive frame, facilitating the connection between the limiting part and the lens drive frame. This also reduces the difficulty of demolding during housing machining.

[0028] For example, multiple countersunk holes can be provided on the lens drive frame, spaced apart and distributed along a direction perpendicular to the first elastic segment of the torsion spring. When the limiting part is inserted into different countersunk holes, the angle between the first and second elastic segments of the torsion spring is different, corresponding to different elastic forces of the torsion spring. If the elastic damping force of the torsion spring is found to be insufficient, the limiting part can be installed closer to the arc-shaped rack to reduce the angle between the first and second elastic segments, thereby increasing the elastic force provided by the torsion spring and increasing the thrust on the lens drive frame, thus increasing the elastic damping force provided by the torsion spring. Conversely, if the elastic damping force of the torsion spring is found to be too large, the limiting part can be installed further away from the arc-shaped rack.

[0029] According to another specific embodiment of the present invention, a reinforcing rib is provided on the second mounting surface. The reinforcing rib includes a first reinforcing rib and a second reinforcing rib that intersect each other, and the first reinforcing rib and the second reinforcing rib form a plurality of grooves.

[0030] By adopting the above technical solution, reinforcing ribs are provided on the second mounting surface of the motor bracket to improve the surface properties of the second mounting surface and enhance its tensile strength or shear strength.

[0031] For example, in this embodiment of the invention, intersecting first and second reinforcing ribs are provided to enhance the tensile or shear strength of the second mounting surface in different directions. Of course, third or fourth reinforcing ribs can also be provided in other directions, and the specific arrangement can be adjusted according to the magnitude of the gravity or other external forces borne by the motor bracket. This embodiment does not impose specific limitations on this.

[0032] According to another specific embodiment of the present invention, it further includes:

[0033] A first lens, along the second direction, includes a first side and a second side, and the lens drive frame is connected to the first side or the second side;

[0034] The housing includes a first sidewall, a second sidewall, and a bottom wall. The first sidewall and the second sidewall are disposed opposite to each other along the second direction. The bottom wall is connected to the first sidewall and the second sidewall. The bottom wall includes a first through hole, through which the top of the lens drive frame is disposed. The bottom wall also defines a light outlet.

[0035] Using the above technical solution, the first side of the first lens is positioned opposite to the first sidewall of the housing, and the second side of the first lens is positioned opposite to the second sidewall of the housing. A first through-hole is provided on the bottom wall of the housing, allowing a lens drive frame connected to either the first or second side of the first lens to pass through, thus placing the structure for driving the movement of the first lens outside the housing. Additionally, a light outlet on the bottom wall allows light containing vehicle information to enter the housing and be projected onto the first lens inside the housing.

[0036] According to another specific embodiment of the present invention, a lens fixing component is also included; both the first sidewall and the second sidewall are provided with mounting seats, the first sidewall is provided with a first ball head, the second sidewall is provided with a second ball head, the lens fixing component is connected to the mounting seat, and the first ball head or the second ball head is limited between the mounting seat and the lens fixing component in the first direction.

[0037] Using the above technical solution, by respectively setting a first ball head and a second ball head on the first side and the second side of the first lens, the drive motor can drive the first lens to rotate around the line connecting the first ball head and the second ball head, thereby adjusting the installation angle of the first lens within the housing. To prevent the first ball head and the second ball head from sliding out or popping out of the mounting base within the housing, a lens fixing component is provided on the mounting base to fix the first ball head and the second ball head to the mounting base along a first direction, but the lens fixing component must not affect the rotation of the first ball head and the second ball head.

[0038] According to another specific embodiment of the present invention, the housing further includes: a third sidewall and a fourth sidewall, the third sidewall and the fourth sidewall being disposed opposite each other along a fourth direction, the bottom wall, the first sidewall, the second sidewall, the third sidewall and the fourth sidewall defining a receiving cavity, and the first lens being disposed in the receiving cavity along a second direction;

[0039] It also includes: a second lens and an image generation unit, wherein the second lens is disposed in the receiving cavity, and in the direction of reflected light path, the first lens is located in front of the second lens; the image generation unit is disposed in the receiving cavity and covers the light outlet, and in the direction of incident light path, the second lens is positioned opposite the light outlet.

[0040] The above technical solution utilizes a housing comprising a first sidewall, a second sidewall, a third sidewall, a fourth sidewall, and a bottom wall to define a receiving cavity. A first lens and a second lens, mounted along a second direction, are respectively disposed within the receiving cavity. An image generation unit emits light containing vehicle information, which is emitted from a light outlet towards the second lens, reflected by the second lens, and then reflected again by the first lens before being projected onto the windshield of the vehicle. In this embodiment, a drive motor can rotate the lens drive frame to adjust the angle at which the reflected light is projected onto the first lens, thereby adjusting the position of the light projected onto the windshield of the vehicle.

[0041] The aforementioned image generation unit is the existing PGU (Image Generation Unit) in the automotive field, and will not be described in detail in this embodiment. Attached Figure Description

[0042] Figure 1 This invention provides a stereoscopic view of the HUD provided in an embodiment of the present invention. Figure 1 ;

[0043] Figure 2 A partial three-dimensional view of the HUD provided in this embodiment of the present invention is shown. Figure 2 ;

[0044] Figure 3 A perspective view showing the positional relationship between the first lens and the driving structure in the HUD provided in this embodiment of the present invention;

[0045] Figure 4 This is a perspective view showing the connection relationship between the first lens and the lens drive frame in the HUD provided in this embodiment of the present invention;

[0046] Figure 5 A perspective view of the housing in the HUD provided in this embodiment of the present invention is shown;

[0047] Figure 6 A perspective view of the second ball head on the second side of the first lens is shown;

[0048] Figure 7 A three-dimensional view of the first ball head on the first side of the first lens is shown;

[0049] Figure 8 A perspective view showing the lens retainer fixing the first ball head or the second ball head;

[0050] Figure 9 A three-dimensional diagram showing the connection between the motor bracket and the lens drive frame. Figure 1 ;

[0051] Figure 10 A three-dimensional diagram showing the connection between the motor bracket and the lens drive frame. Figure 2 ;

[0052] Figure 11 A three-dimensional diagram showing the connection between the motor bracket and the lens drive frame. Figure 3 ;

[0053] Figure 12 Show Figure 3 Enlarged view at point P;

[0054] Figure 13 Show Figure 9 Enlarged view at point G in the middle.

[0055] In the picture:

[0056] 10: Lens drive frame; 11: Arc-shaped rack; 12: Side view; 121: Limiting part; 1211: Arc surface;

[0057] 20: Motor bracket; 21: First mounting surface; 211: Drive motor; 22: Second mounting surface; 221: Positioning post; 222: First limiting plate; 223: Second limiting plate; 224: Reinforcing rib; 2241: First reinforcing rib; 2242: Second reinforcing rib; 23: Connecting plate;

[0058] 30: First gear;

[0059] 40: Torsion spring; 41: First elastic segment; 42: Second elastic segment; 43: Elastic body;

[0060] 50: First lens; 51: First side; 52: Second side;

[0061] 60: Housing; 61: First sidewall; 62: Second sidewall; 63: Bottom wall; 631: First through hole; 632: Light outlet; 64: Mounting base; 65: First ball head; 66: Second ball head; 67: Third sidewall; 68: Fourth sidewall; 69: Receiving cavity;

[0062] 70: Lens fixing component; 80: Second lens; 90: Spring clip;

[0063] A: First direction; B: Second direction; C: Third direction; H: Incident light path direction; F: Reflected light path direction. Detailed Implementation

[0064] 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.

[0065] 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.

[0066] 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.

[0067] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0068] 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.

[0069] 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.

[0070] HUD, or Head-Up Display, is used in vehicles to improve user comfort. To enhance the comfort of HUD use, its projection onto the windshield needs to be adjustable. This requires the curved mirror in the HUD to have an adjustable mounting angle. However, adjusting the curved mirror's angle necessitates a damping structure to ensure smooth operation. Currently, this is typically achieved by integrating the damping structure into a specific motor, using the elastic damping force to control the motor's drive force. However, the complexity and high cost of this specific motor's damping structure significantly increases the overall cost of the HUD.

[0071] This utility model provides a HUD that optimizes the existing structure for adjusting the installation angle of the curved mirror, enabling the control of the curved mirror with damping, and reducing the cost of the HUD.

[0072] Please refer to Figure 1 As shown, the HUD provided in this embodiment includes a housing 60, a first lens 50 and a second lens 80 disposed within the housing 60, and an image generation unit (not shown) disposed between the first lens 50 and the second lens 80. The emitted light from the image generation unit originates from the light outlet 632 along the incident light path direction H, is projected onto the second lens 80, is reflected by the second lens 80, and is reflected along the reflected light path direction F back to the first lens 50. After being reflected again by the first lens 50, the light is projected onto the windshield of the vehicle. The housing 60 is made of plastic.

[0073] The first lens 50 is configured to have an adjustable mounting angle within the housing 60.

[0074] Reference Figure 2 As shown, in the first direction A, the drive structure that controls and adjusts the installation angle of the first lens 50 is located outside the housing 60. Therefore, a first through hole 631 (see Figure 5) is provided on the bottom wall 63 of the housing 60, and the drive structure outside the housing 60 is connected to the first lens 50 inside the housing 60 through the first through hole 631.

[0075] Reference Figure 3 , Figure 6 , Figure 7As shown, along the second direction B, the first lens 50 includes a first side 51 and a second side 52. A first ball head 65 and a second ball head 66 are respectively connected to the first side 51 and the second side 52. The first ball head 65 and the second ball head 66 are rotatably connected to the mounting seats 64 on the first side wall 61 and the second side wall 62 of the housing 60, respectively. A lens drive frame 10 is provided on the bottom surface of the first side 51 of the first lens 50 and connected to it. The lens drive frame 10 is driven by a drive motor 211 to rotate around the line connecting the first ball head 65 and the second ball head 66, thereby controlling the rotation of the first lens 50 to different mounting angles.

[0076] Specifically, refer to Figure 4 and Figure 5 As shown, the first lens 50 is extended along the second direction B and moved downward along the first direction A into the housing 60, so that the lens drive frame 10 is inserted into the first through hole 631 for connection with the structure at its lower end.

[0077] Additionally, refer to Figure 5 , Figure 6 and Figure 7 As shown, the HUD provided in this embodiment of the present invention also includes a lens fixing member 70. In this embodiment of the present invention, in order to prevent the first ball head 65 and the second ball head 66 from sliding out or popping out from the mounting base 64 inside the housing 60, a lens fixing member 70 is provided on the mounting base 64 to fix the first ball head 65 and the second ball head 66 respectively along the first direction A on the mounting base 64, but the lens fixing member 70 cannot affect the rotation of the first ball head 65 and the second ball head 66.

[0078] Among them, reference Figure 7 and Figure 8 As shown, the lens fixing member 70 that fixes the first ball head 65 is a spring piece 90, and the lens fixing member 70 that fixes the second ball head 66 is a clamp (not shown in the figure). That is, the first ball head 65 and the second ball head 66 are fixed by two different lens fixing members 70 respectively. For example, the spring piece 90 includes pressure plates that define different positions on the first ball head 65. In addition, the clamp generally needs to include an upper clamping plate and a lower clamping plate, wherein the upper clamping plate and the lower clamping plate need to include a groove for receiving the second ball head 66, and the upper clamping plate and the lower clamping plate can be locked after the second ball head 66 is fixed to prevent the second ball head 66 from escaping from the groove. The specific structure of the upper clamping plate and the lower clamping plate can refer to the relevant prior art, and this embodiment does not impose specific limitations on it.

[0079] In some embodiments, the spring piece 90 can also be used as a lens retainer 70 to fix the position of the first ball head 65, and the spring piece 90 can also be used as a lens retainer 70 to fix the position of the second ball head 66. In some embodiments, the aforementioned clamp can also be used as a lens retainer 70 to fix the position of the first ball head 65, and the aforementioned clamp can also be used as a lens retainer 70 to fix the position of the second ball head 66.

[0080] It should be noted that the aforementioned first lens 50 can be integrally formed with the lens drive frame 10, i.e., both are made of plastic and manufactured through mold processing. Alternatively, the lens drive frame 10 can be connected to the non-lens structure on the back of the first lens 50 using a connector, which can be a screw. In this connection method, the first lens 50 and the lens drive frame 10 can be made of different materials, such as plastic and aluminum.

[0081] Specifically, the aforementioned driving structure may include the following:

[0082] First, the aforementioned lens drive frame 10 extends along the first direction A, and an arc-shaped rack 11 is provided at the bottom of the lens drive frame 10. A limiting part 121 protruding along the second direction B is provided on the side 12 of the lens drive frame 10.

[0083] Reference Figure 9 , Figure 10 , Figure 11 as well as Figure 12 As shown, along the first direction A, a motor bracket 20 is provided at the lower end of the lens drive frame 10. The motor bracket 20 includes a first mounting surface 21 and a second mounting surface 22 arranged opposite to each other. A drive motor 211 is fixed on the first mounting surface 21, and a positioning post 221 is provided on the second mounting surface 22. The drive shaft of the drive motor 211 extends along the second direction B. A first gear 30 is sleeved on the drive shaft of the motor. The first gear 30 and the positioning post 221 are spaced apart along the third direction C. In addition, along the first direction A, the first gear 30 is located below the arc-shaped rack 11, and the first gear 30 meshes with the arc-shaped rack 11 to drive the lens drive frame 10 to rotate around the second direction B.

[0084] The aforementioned first gear 30 can be a plastic part.

[0085] In addition, a torsion spring 40 is provided on the second mounting surface 22. The torsion spring 40 includes an elastic body 43, a first elastic segment 41, and a second elastic segment 42. The elastic body 43 is sleeved on the positioning post 221. The first elastic segment 41 abuts against the limiting part 121, and the second elastic segment 42 abuts against the second mounting surface 22.

[0086] Using the above technical solution, this embodiment of the utility model utilizes a conventional drive motor 211 to drive the lens drive frame 10 to rotate, while a torsion spring 40 provides an elastic damping force opposite to the driving force of the drive motor 211. This makes the adjustment of the curved mirror's mounting angle by the drive motor 211 smoother, reduces noise generated by mutual impact between moving parts in the structure, and avoids image jitter caused by vehicle vibration. Simultaneously, the elastic damping force provided by the torsion spring 40 keeps the first lens 50 in its working position, preventing the first lens 50 from shaking due to the tooth gap of the meshing teeth when the HUD is subjected to vibration loads, thus avoiding virtual image jitter.

[0087] Specifically, refer to Figure 9 , Figure 10 , Figure 11 as well as Figure 12 As shown, by setting a lens drive frame 10 including an arc-shaped rack 11, the curved mirror in the HUD that requires adjustment of its mounting angle is connected to the lens drive frame 10. By setting a motor bracket 20 to fix the drive motor 211, the drive motor 211 controls the rotation of the first gear 30. Utilizing the meshing relationship between the first gear 30 and the arc-shaped rack 11 of the lens drive frame 10, the lens drive frame 10 is driven to rotate around the extension direction of the drive shaft of the drive motor 211 (i.e., the aforementioned second direction B). This realizes that the drive motor 211 controls the rotation of the curved mirror to adjust the mounting angle of the curved mirror. In addition, by setting a torsion spring 40, and fitting the elastic body 43 of the torsion spring 40 onto the positioning post 221 of the motor bracket 20, abutting the first elastic segment 41 of the torsion spring 40 against the limiting part 121 on the lens drive frame 10, and fixing the second elastic segment 42 of the torsion spring 40 to the motor bracket 20, the lens drive frame 10 is subjected to an elastic damping force opposite to the driving force of the drive motor 211.

[0088] Among them, the drive motor 211 controls the first gear 30 to rotate forward or backward, and the torsion spring 40 can provide an elastic damping force opposite to the driving force of the drive motor 211.

[0089] For example, refer to Figure 3 and Figure 9 As shown, the drive motor 211 controls the rotation of the first gear 30, causing the arc-shaped rack 11 to move left or right, thereby rotating the first lens 50 along the X-axis, allowing the first lens 50 to be installed in the housing 60 at different angles. Specifically, the drive motor 211 controls the first gear 30 to rotate forward (i.e.,...). Figure 9When the first gear 30 rotates to the right, the lens drive frame 10 is raised upwards, and the right end of the limiting part 121 presses down the first elastic segment 41 of the torsion spring 40, causing the lens drive frame 10 to be raised upwards with damping. When the drive motor 211 controls the first gear 30 to reverse, the lens drive frame 10 moves downwards, and the left end of the limiting part 121 presses down the first elastic segment 41 of the torsion spring 40, causing the lens drive frame 10 to move downwards with damping. This achieves damped adjustment of the installation angle of the first lens 50 (the installation angle is the angle between the mirror surface of the first lens 50 and the bottom wall 63 of the housing 60), while reducing the noise generated by the mutual impact between moving parts during motor drive, and also avoiding the shaking of the HUD projected image due to vehicle vibration.

[0090] It is understood that the torsion spring 40 is in a compressed state when installed between the lens drive frame 10 and the motor bracket 20, allowing the torsion spring 40 to provide elastic force. It is also understood that the smaller the angle between the first elastic segment 41 and the second elastic segment 42 of the torsion spring 40, the greater the elastic force that the torsion spring 40 can provide. The specific selection of the torsion spring 40, or the size of the angle between the first elastic segment 41 and the second elastic segment 42, can be adaptively selected based on parameters such as the actual weight of the lens drive frame 10 and the curved mirror. This embodiment of the present invention does not impose specific limitations in this regard.

[0091] Additionally, refer to Figure 9 , Figure 10 , Figure 11 or Figure 12 As shown, a horizontal connecting plate 23 is provided at the upper end of the motor bracket 20, that is, the connecting plate 23 is perpendicular to the motor bracket 20, and a connector, such as a screw or bolt, is provided on the connecting plate 23 to connect the connecting plate 23 to the housing 60 and fix the position of the motor bracket 20. Alternatively, the connecting plate 23 and the motor bracket 20 can be made into an integral structure, and this embodiment does not impose specific limitations on this. In addition, both the connecting plate 23 and the motor bracket 20 can be made of plastic parts, and a reinforcing rib structure to enhance their stability can be provided on their surface. This embodiment does not impose specific limitations on the type or arrangement of the reinforcing ribs.

[0092] Reference Figure 10 As shown, according to another specific embodiment of the present invention, the limiting part 121 includes an arc surface 1211, which abuts against the first elastic segment 41.

[0093] Using the above technical solution, the limiting part 121 includes an arc surface 1211, which allows the first elastic segment 41 to abut against the arc surface 1211, enabling linear contact between the first elastic segment 41 and the limiting part 121. Furthermore, the arc surface 1211 ensures that the first elastic segment 41 maintains linear contact with the limiting part 121 regardless of the rotation angle of the lens drive frame 10. Additionally, by adjusting the curvature of the arc surface 1211, the angle between the first elastic segment 41 and the second elastic segment 42 remains equal regardless of the rotation angle of the lens drive frame 10, thus ensuring that the torsion spring 40 provides equal elastic damping force. Specifically, the curvature of the arc surface 1211 needs to be adjusted adaptively according to the curvature of the arc-shaped gear of the lens drive frame 10; this embodiment of the invention does not impose specific limitations on this.

[0094] Reference Figure 9 , Figure 10 , Figure 12 As shown, according to another specific embodiment of the present invention, it also includes a first limiting plate 222, which is disposed on the second mounting surface 22 along the third direction C, the positioning post 221 is located between the first limiting plate 222 and the first gear 30, and the second elastic segment 42 abuts against the first limiting plate 222.

[0095] Using the above technical solution, a first limiting plate 222 is set to fix the position of the second elastic segment 42 on the motor bracket 20.

[0096] For example, a limiting hole can be provided on the first limiting plate 222 so that the end of the second elastic segment 42 can be hooked with the limiting hole. Alternatively, the end of the second elastic segment 42 can be provided in the shape of a hook so that it can be hooked with the first limiting plate 222.

[0097] Reference Figure 9 , Figure 10 , Figure 11 , Figure 12 As shown, according to another specific embodiment of the present invention, it further includes a second limiting plate 223, which protrudes from the second mounting surface 22 along the second direction B; along the first direction A, the second limiting plate 223 is located above the positioning post 221; along the second direction B, the first elastic segment 41 is located between the second limiting plate 223 and the second mounting surface 22.

[0098] Using the above technical solution, a second limiting plate 223 is provided on the second mounting surface 22 of the motor bracket 20 to limit the position of the first elastic segment 41 in the second direction B, so as to prevent the second elastic segment 42 from moving along the second direction B and failing to abut against the limiting part 121, thereby affecting the damping effect of the torsion spring 40 on the lens drive frame 10.

[0099] For example, the second limiting plate 223 can be configured as an L-shaped limiting plate, wherein one end of the L-shaped limiting plate is connected to the second mounting surface 22 and the other end is parallel to the second mounting surface 22, thereby restricting the second elastic segment 42 between the second mounting surface 22 and the second limiting plate 223.

[0100] Reference Figure 13 As shown, according to another specific embodiment of the present invention, the teeth of the first gear 30 and the teeth of the arc-shaped rack 11 have a radial clearance x1 and a circumferential clearance x2.

[0101] Using the above technical solution, the radial clearance x1 refers to the clearance after meshing in the length direction of the teeth, and the circumferential clearance x2 refers to the clearance after meshing in the width direction of the teeth. The clearances in different directions are beneficial to prevent the teeth of the lens drive frame 10 and the teeth of the first gear 30 from jamming, thus preventing the lens drive frame 10 from rotating.

[0102] It should be noted that the specific values ​​of the radial clearance x1 and circumferential clearance x2 in this embodiment of the present invention are not specifically limited, and can be adjusted according to the material of the teeth used in actual applications, the wear resistance of the teeth, etc.

[0103] According to another specific embodiment of the present invention, the lens drive frame 10 is provided with a countersunk hole (not shown in the figure), and the limiting part 121 is inserted into the countersunk hole.

[0104] By adopting the above technical solution, a countersunk hole is provided on the lens drive frame 10, which facilitates the connection of the limiting part 121 to the lens drive frame 10. It also reduces the difficulty of drafting during the machining of the housing 60. Because the attached drawing shows a countersunk hole, and the limiting part 121 is already installed within the countersunk hole, the location of the countersunk hole is not indicated in the view.

[0105] For example, multiple countersunk holes can be provided on the lens drive frame 10, spaced apart and distributed along a direction perpendicular to the first elastic segment 41 of the torsion spring 40. When the limiting part 121 is inserted into different countersunk holes, the angle between the first elastic segment 41 and the second elastic segment 42 of the torsion spring 40 is different, corresponding to different elastic forces of the torsion spring 40. When it is found that the elastic damping force of the torsion spring 40 is insufficient, the limiting part 121 can be installed near the arc-shaped rack 11 to reduce the angle between the first elastic segment 41 and the second elastic segment 42, thereby increasing the elastic force provided by the torsion spring 40, increasing the thrust on the lens drive frame 10, and thus increasing the elastic damping force provided by the torsion spring 40. Conversely, when it is found that the elastic damping force of the torsion spring 40 is too large, the limiting part 121 can be installed away from the arc-shaped rack 11.

[0106] Reference Figure 9 and Figure 10As shown, according to another specific embodiment of the present invention, a reinforcing rib 224 is provided on the second mounting surface 22. The reinforcing rib 224 includes a first reinforcing rib 2241 and a second reinforcing rib 2242 that intersect each other, and the first reinforcing rib 2241 and the second reinforcing rib 2242 form a plurality of grooves.

[0107] By adopting the above technical solution, a reinforcing rib 224 is provided on the second mounting surface 22 of the motor bracket 20 to improve the surface properties of the second mounting surface 22 and enhance its tensile strength or shear strength.

[0108] For example, in this embodiment of the invention, intersecting first reinforcing ribs 2241 and second reinforcing ribs 2242 are provided to enhance the tensile or shear strength of the second mounting surface 22 in different directions. Of course, third or fourth reinforcing ribs can also be provided in other directions, and the specific arrangement can be adjusted according to the magnitude of the gravity or other external forces borne by the motor bracket 20. This embodiment does not impose specific limitations on this.

[0109] In summary, the HUD provided by this utility model embodiment is not only simple in structure, using only a general motor, but can also be made of plastic, effectively reducing the processing cost of the HUD.

[0110] 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 HUD, characterized in that, include: A lens drive frame for mounting lenses extends along a first direction. Along the first direction, the bottom of the lens drive frame is provided with an arc-shaped rack. The lens drive frame also includes a side side located on one side of the lens drive frame in a second direction. The side side is provided with a limiting portion protruding along the second direction. The motor bracket, along the first direction, includes a first mounting surface and a second mounting surface disposed opposite to each other. A drive motor is fixed on the first mounting surface, and a positioning post is provided on the second mounting surface. The drive shaft of the drive motor is disposed on the second mounting surface and extends along the second direction. A first gear is sleeved on the drive shaft. The first gear and the positioning post are spaced apart along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. Along the first direction, the first gear is located below the arc-shaped rack and meshes with the arc-shaped rack to drive the lens drive frame to rotate around the second direction. A torsion spring includes an elastic body, a first elastic segment, and a second elastic segment. The elastic body is sleeved on the positioning post. The first elastic segment abuts against the limiting part, and the second elastic segment abuts against the second mounting surface.

2. The HUD according to claim 1, characterized in that, The limiting part includes an arc surface, which abuts against the first elastic segment.

3. The HUD according to claim 1, characterized in that, It also includes a first limiting plate disposed on the second mounting surface along the third direction, the positioning post being located between the first limiting plate and the first gear, and the second elastic segment abutting against the first limiting plate.

4. The HUD according to claim 1, characterized in that, It also includes a second limiting plate, which protrudes from the second mounting surface along the second direction; along the first direction, the second limiting plate is located above the positioning post; along the second direction, the first elastic segment is located between the second limiting plate and the second mounting surface.

5. The HUD according to claim 1, characterized in that, The teeth of the first gear and the teeth of the arc-shaped rack have radial and circumferential clearances.

6. The HUD according to claim 1, characterized in that, The lens drive frame is provided with a countersunk hole, and the limiting part is inserted into the countersunk hole.

7. The HUD according to claim 1, characterized in that, The second mounting surface is provided with reinforcing ribs, which include intersecting first and second reinforcing ribs, and the first and second reinforcing ribs form multiple grooves.

8. The HUD according to claim 1, characterized in that, Also includes: A first lens, along the second direction, includes a first side and a second side, and the lens drive frame is connected to the first side or the second side; The housing includes a first sidewall, a second sidewall, and a bottom wall. The first sidewall and the second sidewall are disposed opposite to each other along the second direction. The bottom wall is connected to the first sidewall and the second sidewall. The bottom wall includes a first through hole, through which the top of the lens drive frame is disposed. The bottom wall also defines a light outlet.

9. The HUD according to claim 8, characterized in that, Also includes: Lens fixing components; Both the first sidewall and the second sidewall are provided with mounting bases. The first sidewall is provided with a first ball head, and the second sidewall is provided with a second ball head. The lens fixing member is connected to the mounting base. The first ball head or the second ball head is limited between the mounting base and the lens fixing member in the first direction.

10. The HUD according to claim 8, characterized in that, The housing further includes a third sidewall and a fourth sidewall, the third sidewall and the fourth sidewall being disposed opposite each other along a fourth direction, the bottom wall, the first sidewall, the second sidewall, the third sidewall and the fourth sidewall defining a receiving cavity, and the first lens being disposed within the receiving cavity along a second direction; It also includes: a second lens, disposed within the receiving cavity, wherein, in the direction of reflected light path, the first lens is located in front of the second lens; An image generation unit is disposed within the receiving cavity and covers the light outlet. In the direction of incident light path, the second lens is positioned directly opposite the light outlet.

Images