Lens driving structure, display device and vehicle

Abstract

The utility model relates to the technical field of projection display, in particular to a lens driving structure, display equipment and a vehicle. The lens driving structure comprises an optical lens, at least one end of the two ends of the optical lens is provided with a rocker arm, and the rocker arm is used for driving angle adjustment of the optical lens under the action of driving force; a driving block is arranged at the free end of the rocker arm, the driving block is matched with a motor assembly to obtain driving force output by the motor assembly, a first spring is connected between the free end of the rocker arm and the driving block, and the rocker arm and the driving block are relatively fixed through the first spring. And the torsion direction of the first spring corresponds to the first direction in which the driving block moves under the action of the driving force. Reliable installation of the lens driving structure can be achieved, shaking caused in the driving process is avoided, and additional loads of the motor do not need to be increased.

Description

Technical Field

[0001] The present application relates to the field of projection display technology, and in particular to a lens driving structure, a display device and a vehicle. Background Art

[0002] HUD (Head Up Display) is a new way to realize vehicle display on the vehicle windshield. The corresponding HUD display device emits display light from the optical machine, and projects it on the windshield through the optical lens to reflect it to form a virtual image, which produces an enhanced display effect with the real world outside the windshield. Among them, the optical lens plays a very important role in the entire optical system. In order to cooperate with the optical path adjustment, the optical lens also needs to be provided with a lens driving structure to achieve angle adjustment. At present, the structure that drives the adjustment of the optical lens mainly adopts a simple gear matching transmission or a linear motor drive, etc. Since these structures will inevitably have gaps caused by tolerances during installation, the optical lens is easily affected by the bumps during the driving process of the vehicle, resulting in slight axial shaking, which will cause the final image projected on the windshield to shake, greatly affecting the user's viewing experience. In order to eliminate the above-mentioned shaking, some solutions will apply a force in the opposite direction in the axial direction to suppress the shaking, but this will make the motor that drives the optical lens to rotate bear additional force, causing the motor to work under a high load for a long time, thereby affecting the service life of the motor. Summary of the invention

[0003] The purpose of this application is to provide a lens driving structure, a display device and a vehicle, which solves the technical problems in the prior art that the lens driving structure of the HUD display device is not stable enough when applied to the vehicle and has high requirements on the power output of the motor, mechanical transmission, etc.

[0004] In order to solve the above technical problems, this application adopts the following technical solutions.

[0005] In a first aspect, the present application provides a lens driving structure, comprising:

[0006] An optical lens, wherein at least one of the two ends of the optical lens is provided with a rocker arm, and the rocker arm is used to drive the angle adjustment of the optical lens under the action of a driving force;

[0007] A driving block is provided on the free end of the rocker arm, and the driving block cooperates with the motor assembly to obtain the driving force output by the motor assembly. A first spring is connected between the free end of the rocker arm and the driving block, and the first spring enables the rocker arm and the driving block to be relatively fixed. The torsional direction of the first spring corresponds to the first direction of movement of the driving block under the action of the driving force.

[0008] According to the above description, in an optional implementation mode, when the transmission structure is working in the forward direction, the driving force output by the motor assembly can ultimately reach the optical lens to achieve angle adjustment with the help of the first spring and the rocker arm. The torsion of the first spring can suppress vibration without generating additional load on the operation of the motor.

[0009] In an optional implementation of the first aspect, the rocker arm is fan-shaped, and the free end of the rocker arm is located near the arc portion of the fan-shaped portion.

[0010] In an optional implementation of the first aspect, the fan-shaped central area of ​​the rocker arm is hollow.

[0011] According to the above description, an optional implementation method specifically designs the shape of the rocker arm, configures a reasonable size and weight, and ensures that the free end of the rocker arm can fully accommodate the drive block.

[0012] In an optional embodiment of the first aspect, the free end of the rocker arm includes a receiving space for accommodating the driving block, a guide rod is fixed between the first side and the second side of the receiving space, and the driving block is sleeved on the guide rod to limit the movement of the driving block in a second direction, and the second direction is different from the first direction.

[0013] In an optional implementation of the first aspect, the second direction is a direction parallel to the first side surface and / or the second side surface.

[0014] According to the above description, the optional implementation can ensure that the driving block is stably located in the receiving space, and eliminate the mechanical jitter by orienting along the movement space of the guide rod.

[0015] In an optional implementation of the first aspect, the first spring enables the rocker arm and the driving block to be relatively fixed, including:

[0016] The first spring is disposed between the driving block and the first side surface along the guide rod, and the driving block is pressed against the second side surface with the support of the first spring.

[0017] According to the above description, the driving block of the optional implementation mode is stably set on the guide rod and fixed to the rocker arm by default without relative displacement. When subjected to external force generated by vibration, the first spring will resist the driving block from approaching the first side, maintaining a relatively fixed relationship of the entire system.

[0018] In an optional implementation manner of the first aspect, the guide rod is arc-shaped and is consistent with a movement path of the driving block under the action of the driving force.

[0019] According to the above description, the optional implementation method ensures that the restraining effect of the first spring on the drive block corresponds to the shaking effect of the entire lens drive structure, reduces the jamming of the drive block on the guide rod, and effectively absorbs the vibration of the entire structure.

[0020] In an optional implementation of the first aspect, the driving block cooperates with the motor assembly including:

[0021] The motor assembly includes a motor and a worm driven to rotate by the motor;

[0022] A gear tooth is disposed on a surface of the driving block opposite to the worm, so that at least a portion of the gear tooth is meshed with the worm.

[0023] In an optional implementation of the first aspect, the gear teeth of the driving block are helical teeth.

[0024] According to the above description, the optional implementation can well convert the rotational motion output by the motor into the circular motion of the drive block around the lens axis, and the self-locking ability of the worm can also offset the external force impact under the reverse action, further improving stability.

[0025] In an optional implementation of the first aspect, the gear tooth size on the driving block supports configuration according to transmission requirements.

[0026] According to the above description, in the optional implementation, the driving block and the rocker arm are discretely arranged, so that the driving blocks with different gear tooth sizes can be replaced according to actual conditions, thereby improving the flexibility of the configuration of the entire lens driving structure.

[0027] In an optional implementation of the first aspect, the driving block cooperates with the motor assembly including:

[0028] The motor assembly is used to output linear motion;

[0029] The driving block and the motor assembly are connected via a ball bearing to convert linear motion into circular motion.

[0030] According to the above description, an optional implementation adopts another method to drive the rocker arm to perform circular motion, thereby driving the angle adjustment of the optical lens.

[0031] In an optional implementation of the first aspect, at least one of the two ends of the optical lens is provided with a rocker arm, comprising:

[0032] The rocker arm is only arranged on the first end of the optical lens, so that the rocker arm can improve the tightness of the matching surface between the driving block and the motor assembly under the action of its own gravity.

[0033] According to the above description, an optional implementation adopts an asymmetric design structure so that the center of gravity of the overall structure of the optical lens after installation is biased toward the side where the first end is located. Ultimately, the gravity of the rocker arm can be applied to the mating surface between the drive block and the motor assembly, such as between the gear teeth of the drive block and the gear teeth of the worm, so that the two are tightly meshed together, eliminating the return gap that exists during the reciprocating motion.

[0034] In an optional implementation of the first aspect, at least one of the two ends of the optical lens is provided with a rocker arm, comprising:

[0035] The rocker arm is fixed to a rotating shaft extending from both sides of the optical lens, wherein the rocker arm is provided with an axial hole matching the rotating shaft, and when the axial hole is sleeved on the rotating shaft, at least a portion of the inner surface of the axial hole is abutted against at least a portion of the outer surface of the rotating shaft, so that the rocker arm rotates synchronously with the rotating shaft.

[0036] According to the above description, the rocker arm and the rotating shaft of the optional implementation mode are discretely arranged to facilitate modular design and installation during large-scale mass production in the later stage. The shaft hole of the rocker arm and the rotating shaft are engaged with each other in a specific shape, such as a flat round shaft, to ensure that the rocker arm does not slip on the rotating shaft.

[0037] In an optional implementation of the first aspect, the rocker arm and the optical lens are integrally formed; or

[0038] A connecting shaft is provided on the side of the optical lens, and the rocker arm is provided with an axial hole that cooperates with the connecting shaft. When the axial hole is engaged on the connecting shaft, at least a portion of the inner surface of the axial hole is abutted against at least a portion of the outer surface of the connecting shaft, so that the rocker arm and the optical lens rotate synchronously.

[0039] According to the above description, the optical lens of the optional implementation mode is passed through the rotating shaft and rotates around the rotating shaft, and the rocker arm synchronizes the optical lens with the rotating shaft under the action of the driving force, thereby improving the reliability of production and manufacturing.

[0040] In an optional implementation of the first aspect, a second spring is arranged between the rocker arm and the rotating shaft to provide an elastic force in the rotation direction of the rotating shaft.

[0041] According to the above description, an optional implementation method suppresses the rotational jitter between the rocker arm and the rotating shaft through the elastic force of the second spring, thereby ultimately improving the stability of the optical lens.

[0042] In a second aspect, the present application provides a display device, comprising the lens driving structure described in the first aspect and an optical lens for light path planning;

[0043] The lens driving structure adjusts the angle of the optical lens under the action of a motor.

[0044] In a third aspect, the present application provides a means of transportation, comprising the lens driving structure described in the first aspect or the display device described in the second aspect.

[0045] Compared with the prior art, the present application sets a rocker arm as a transmission structure between the optical lens and the motor assembly to achieve the angle adjustment of the optical lens, and when the rocker arm receives the driving force output by the motor assembly, it is directly obtained by the driving block on the free end of the rocker arm, and the driving block is fixed together with the rocker arm and a first spring is set therebetween for connection, so that the first spring provides the internal force on the transmission chain to achieve the damping buffering of the entire lens driving structure. The present application can achieve the reliable installation of the lens driving structure, avoid the shaking caused during driving, and does not need to increase the additional load of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the description of the technical solution. Obviously, the drawings described below are only some examples recorded in the present application, and a person of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

[0047] Figure 1 Schematic diagram of HUD projection display in some examples of this application.

[0048] Figure 2 Schematic diagram of the lens driving structure in some examples of this application.

[0049] Figure 3 Schematic diagram of the lens driving structure in some examples of this application.

[0050] Figure 4 Schematic diagram of the lens driving structure in some examples of this application.

[0051] Figure 5 Schematic diagram of optical lenses in some examples of this application.

[0052] Figure 6 Schematic diagram of the rocker arm in some examples of this application.

[0053] Figure 7 Schematic diagram of the rocker arm in some examples of this application.

[0054] Figure 8 Schematic diagram of the rocker arm in some examples of this application.

[0055] Fig. 9 Schematic diagram of the lens driving structure in some examples of this application.

[0056] Fig.10This is a schematic diagram of the HUD display device structure in some examples of this application.

[0057] Fig.11 This is a schematic diagram of projection display in a vehicle in some examples of the present application.

[0058] Figure Number:

[0059] 1 Optical machine 2 First reflector 3 Second reflector

[0060] 4 Windshield 5 Virtual image 6 Human eye

[0061] 10 center console 100 HUD display device 101 housing

[0062] 102 projection window 21 optical lens 211 rotating shaft

[0063] 2111 Flat end of rotating shaft 2112 Round end of rotating shaft 221 Rocker arm

[0064] 2210 Shaft hole 2211 Shaft hole flat end 2212 Shaft hole round end

[0065] 2213 hollow opening 2214 receiving space 2215 first side

[0066] 2216 second side surface 2217 guide rod 222 driving block

[0067] 223 first spring 23 motor assembly 231 motor

[0068] 232 Worm 24 Second spring 31 Mounting base DETAILED DESCRIPTION

[0069] The present application will be described in detail below in conjunction with the accompanying drawings, but the content of the description is merely some examples recorded in the present application and does not limit the present application. Changes in structure, method, function, etc. made by ordinary technicians in this field based on these examples are included in the protection scope of the present application.

[0070] It should be noted that the same reference numerals or marks may be used in different examples, but these do not represent an absolute connection in structure or function. In addition, the "first", "second", etc. mentioned in each example are only for the convenience of description, and do not represent an absolute distinction in structure or function, nor can they be understood as indicating or implying the relative importance or the number of corresponding objects. Unless otherwise specified, the "at least one" that may be involved in the description refers to one or more, and "more than one" refers to two or more.

[0071] In addition, when expressing a feature, the character " / " can indicate that there is an or relationship between the front and back associated objects. For example, head-up display / head-up display can be expressed as head-up display or head-up display. When expressing an operation, the character " / " can indicate that there is a division relationship between the front and back associated objects. For example, the magnification M=L / P can be expressed as L (virtual image size) divided by P (image source size). Moreover, the "and / or" in different examples is only to describe the association relationship between the front and back associated objects. This association relationship can include three situations. For example, a concave mirror and / or a convex mirror can be expressed as the existence of a concave mirror alone, the existence of a convex mirror alone, and the existence of both a concave mirror and a convex mirror.

[0072] HUD projection display mainly uses the optical reflection principle to reflect the imaging light to be displayed through a transparent surface into the viewer's eyes. The human eye can see the virtual image information in the opposite direction of the light. Correspondingly, the transparent surface can be the windshield of the vehicle, and the windshield can be used as a display screen to display the navigation information, speed, etc. of the vehicle. Figure 1As shown, the HUD display device may include at least an optical machine 1, a first reflector 2, a second reflector 3, etc., wherein the optical machine 1 includes a backlight source and an image source (not shown), the backlight source is used to provide illumination light and adjust the brightness of the illumination light according to control, for example, the backlight source may be an LED (Light Emitting Diode), a laser, etc. Under the illumination light provided by the backlight source, the image source adjusts the corresponding display content according to control and projects the display light from the surface of the image source, for example, the image source may be an LCD (Liquid Crystal Display), a DMD (Digital Micromirror Devices), a MEMS (Micro-Electro-Mechanical System) micromirror, a LCOS (Liquid Crystal on Silicon), etc. The first reflector 2 and the second reflector 3 can project the display light projected by the optical machine 1 onto the windshield 4, so as to customize the optical path in a smaller space and meet different projection display requirements. The first reflector 2 and the second reflector 3 can be set to concave mirrors, convex mirrors, concave lenses, convex lenses, etc. of other specifications according to the requirements of optical planning, and the surface shape of the lens can adopt a free-form surface. Optionally, at least one of the first reflector 2 and the second reflector 3 can also be adjusted to a certain degree of angle, so as to change the projection position of the display light on the windshield 4 to meet the needs of viewers of different heights. The display light of the optical machine 1 is finally reflected on the windshield 4 of the vehicle to form a virtual image 5. When the human eye 6 observes the virtual image 5 facing the windshield 4, it can feel a certain sense of depth, just like watching a real object at a specific distance outside the windshield. The virtual image 5 can be the navigation information, vehicle speed, etc. as described above. It should be added that, according to the characteristics of different optical machines, the HUD display device can also be provided with a diffuser. In some examples, the HUD display device can also include Fresnel lenses, waveguide optical devices, diffractive optical devices, holographic optical devices, tapered optical fibers, etc.

[0073] like Figure 2 As shown, the lens driving structure includes an optical lens 21 and a shaft 211 connected to the optical lens 21. Optionally, the shaft 211 can be fixed together with the back plate of the optical lens 21 and pass through both ends of the optical lens 21. The optical lens 21 can be installed on the inner wall of the shell of the HUD display device through the shaft 211, and then the optical lens 21 can rotate together with the shaft 211 inside the HUD display device. In some examples, the shaft 211 can also be directly fixed to the inner wall of the shell of the HUD display device, and the optical lens 21 is inserted on the shaft 211 and rotates around the shaft 211. Optionally, the optical lens 21 is inserted on the shaft 211 through the back plate of the optical lens 21. Refer to Figure 1, the optical lens plays a role in light path planning in the HUD display device, and can guide the display light projected by the optical machine to the corresponding path so as to reach the designated position on the windshield. In order to further adjust the path of light transmission, such as adjusting the projection height on the windshield or retracting the optical lens to avoid direct external light, the above optical lens can be driven by a motor to adjust the angle. Therefore, in order to achieve the angle adjustment of the optical lens 21, in addition to the optical lens 21 and the rotating shaft 211, in this example, a rocker arm 221 is also provided at both ends of the optical lens to achieve a transition connection. The rocker arm 221 is perpendicular to the rotating shaft 211 and has a certain length. It is used to cooperate with the motor assembly 23 provided below the optical lens 21 through the free end of the rocker arm 221. The rocker arm 221 can transmit the driving force output by the motor assembly 23 to the optical lens 21 or the rotating shaft 211, so that the optical lens 21 meets certain angle adjustment requirements. In some examples, the connection end of the rocker arm 221 can be fixed to the optical lens 21, or fixed to the rotating shaft 211, which will be described in detail below. Furthermore, in order to reduce the difficulty of design and processing and improve the ability of modular design and installation, a detachable fixing method is adopted between the rocker arm 221 and the optical lens 21 and the rotating shaft 211, and the rocker arm 221 is separately set as an independent component.

[0074] In a specific example, the rocker arm 221 and the motor assembly 23 are connected by the drive block 222. Accordingly, when the entire transmission structure is working in the forward direction, for example, when the motor assembly 23 starts to operate, the driving force output by the motor assembly 23 is first transmitted to the drive block 222, and then sequentially reaches the rocker arm 221, the optical lens 21, etc. When the entire transmission structure is working in the reverse direction, for example, when the optical lens 21 is affected by the bumps and transmits the vibration force as the active part, the vibration force is first transmitted to the rocker arm 221, and then sequentially reaches the drive block 222 and the motor assembly 23. Figure 3 , Figure 4As shown, in some examples, the motor assembly 23 includes a motor 231 and a worm 232 driven to rotate by the motor 231, and the worm 232 directly cooperates with the driving block 222. In this example, a helical gear that cooperates with the gear teeth on the worm 232 is provided on the side of the driving block 222 opposite to the worm 232, and the two are meshed together. As the worm rotates, the meshing position of the two will change, thereby converting the rotational motion of the worm 232 into the circular motion of the driving block 222. When working in the reverse direction, if the driving block 222 transmits vibration force to the worm 232, the worm 232 will not rotate with it because the worm 232 is subject to the self-locking mechanism of the motor 231, which is equivalent to stabilizing the movement of the driving block 222. In some examples, the cooperation relationship between the drive block 222 and the motor assembly 23 can also be based on other transmission structures. For example, the motor assembly 23 includes a motor and a slider driven by the motor. The slider can output linear motion under the cooperation of the screw and the guide rail, and the slider and the drive block 222 set on the rocker arm 221 are connected by a ball bearing, so that the linear motion of the slider can also be converted into the circular motion of the drive block 222, thereby driving the rocker arm 221 and the optical lens 21 to adjust the angle. It should be noted that there can be other ways of transmission cooperation between the drive block 222 and the motor assembly 23, which is not limited to the above examples. It is only necessary to ensure that the drive block 222 and the rocker arm 221 make corresponding movements at the same time under the action of the driving force, so that the connected optical lens 21 can achieve the angle adjustment requirement.

[0075] like Figure 5 , Figure 6 As shown, for the example where the rocker arm 221 needs to be directly fixed to the rotating shaft 211, the rocker arm 221 and the rotating shaft 211 can be set separately, so as to avoid the problem that the length of the rocker arm 221 is too long and is not conducive to the overall design. At the same time, the rocker arm 221 of different lengths can be flexibly configured according to the internal space of the HUD display device. Accordingly, the part of the rotating shaft 211 extending from both sides of the optical lens 21 and fixed to the rocker arm 221 is provided with a cross-sectional shape different from other positions, such as Figure 5 As shown, the cross-section part adopts the shape of a flat mouth 2111 and the part adopts the shape of a round mouth 2112. Figure 6 As shown, the connecting end of the rocker arm 221 fixed to the rotating shaft 211 is provided with an axial hole 2210, and the axial hole 2210 also has a flat opening 2211 (see Figure 4 ) and round mouth 2212 (refer to Figure 4), this can ensure that when the rocker arm 221 is sleeved on the rotating shaft 211 through the shaft hole 2210, the two can just butt against each other, and when the rocker arm 221 and the rotating shaft 211 are fixed, the two can achieve synchronous rotation. This is specifically because the flat end 2211 of the shaft hole 2210 is butted against the flat end 2111 of the rotating shaft. Optionally, the size of the shaft hole 2210 is slightly smaller than the size formed by the flat end 2111 and the round end 2112 of the rotating shaft, so that an interference fit is formed after installation. In more examples, other shapes of snap-fitting methods can also be used to ensure that the two can be reliably fixed, thereby facilitating modular design and installation. In some examples, the rocker arm 221 can also be directly fixed to the optical lens 21 or the back plate of the optical lens 21, for example, the rocker arm 221 and the optical lens 21 or the back plate of the optical lens 21 are integrally formed. Optionally, the rocker arm 221 may also adopt a modular design, and an axial hole 2210 is also provided at the connecting end of the rocker arm 221, and a connecting shaft is provided on the side of the optical lens 21, such as the side of the back plate of the optical lens 21. The connecting shaft can be understood as a convex structure provided on the corresponding side, and the shape of the convex structure can refer to Figure 5 The flat end 2111 and the round end 2112 of the rotating shaft, and similarly, the shaft hole 2210 of the rocker arm 221 can also be engaged on the connecting shaft. In this way, due to the abutment relationship between the flat ends 2111 and 2211, it is ensured that the rocker arm 221 can form a reliable fixed structure with the optical lens 21.

[0076] In some examples, such as Figure 6-8 As shown, the rocker arm 221 may be fan-shaped, with the connecting end of the shaft hole 2210 being located at the vertex of the fan, and the arc portion of the fan is away from the connecting end to form a free end for circular motion, which is the connecting portion that cooperates with the motor assembly 23. The same material may be used to fill the space between the connecting end and the free end of the rocker arm 221, or a hollow opening 2213 may be used to reduce costs. In some examples, in order to accommodate the drive block 222, a receiving space 2214 is also provided at the lower part of the hollow opening 2213, i.e., the free end. The receiving space 2214 adopts a semi-enclosed structure, wherein at least one side facing away from the connecting end is connected inside and outside, so that the drive block 222 accommodated therein can be connected to the motor assembly 23. In a specific example, the receiving space 2214 includes a first side surface 2215 and a second side surface 2216 that are opposite to each other, which may be the edges where the two radii of the fan-shaped rocker arm 221 are located. As shown in FIG. Figure 7As shown, in order to facilitate the storage of the driving block 222, a guide rod 2217 is fixed between the first side surface 2215 and the second side surface 2216. The guide rod 2217 can cooperate with the guide hole set on the driving block 222, so that the driving block 222 is sleeved on the guide rod 2217. The driving block 222 can only move along the direction of the guide rod 2217, and the movement in other directions is restricted, such as the direction parallel to the first side surface 2215 and the second side surface 2216. In this way, the driving block 222 will be well stored in the receiving space 2214, reducing the possibility of falling off from the receiving space 2214 and unnecessary shaking. Specifically, the direction of the guide rod 2217 can be consistent with the movement direction of the driving block 222 driven by the motor assembly 23. For example, the driving block 222 realizes circular motion through meshing transmission, and then the guide rod 2217 is arc-shaped, which is correspondingly consistent with the fan-shaped arc of the rocker arm 221. In this way, the driving block 222 will not form a force in a conflicting direction with the guide rod 2217 under the transmission of the motor assembly 23, and the driving force received by the driving block 222 will only be transmitted along the direction of the guide rod 2217.

[0077] In some examples, the guide rod 2217 and the receiving space 2214 and the drive block 222 are all detachable, that is, the drive block 222 can be replaced, and a split design is adopted between the drive block 222 and the rocker arm 221. As described above, if the drive block 222 cooperates with the worm 232 of the motor assembly 23 through gear teeth, then gear teeth with different modules and numbers of teeth will produce different strokes and driving forces, which are often determined according to the actual HUD display device parameters. In this example, since the drive block 222 can be flexibly replaced, drive blocks with gear teeth of different sizes can be configured according to actual needs, thereby providing adaptability to the scene. Furthermore, when the drive block 222 is sleeved on the guide rod 2217, a certain amount of moving space is reserved, that is, the drive block 222 has a certain distance from at least one of the first side 2215 and the second side 2216. At this time, in order to well transmit the driving force received by the drive block 222 to the rocker arm 221 (refer to Figure 2-4 ),like Figure 8 As shown, a first spring 223 is also provided between the driving block 222 and the first side surface 2215 or the second side surface 2216. The central hole of the spirally wound first spring 223 can be exactly sleeved on the guide rod 2217, one end of which is fixed on one of the first side surface 2215 and the second side surface 2216, and the other end is fixed on the opposite side of the driving block 222, so that the first spring 223 can just fill the gap between the driving block 222 and the guide rod 2217 (i.e., the above-mentioned moving space). Figure 2-4For example, the first spring 223 is arranged between the first side surface 2215 and the driving block 222 along the guide rod 2217, and the size of the first spring 223 is just enough to make the driving block 222 abut against the second side surface 2216, so that the first spring 223 can provide a certain torque to the driving block 222, so that a relatively fixed relationship is formed between the rocker arm 221 and the driving block 222, and the first spring 223 can be a spiral spring, a torsion spring, a compression spring, etc., and the torque provided by it can resist the external force on the driving block, so that it is stably placed on the guide rod 2217 to achieve force transmission. In some examples, a first spring can also be arranged at both ends of the driving block 222 along the guide rod 2217, so that the first spring of the driving block 222 close to the first side surface 2215 abuts against the first side surface 2215, and the first spring of the driving block 222 close to the second side surface 2216 abuts against the second side surface 2216, and the first springs at both ends are also fixed to the driving block 222, providing a torque to the driving block 222 so that the driving block 222 achieves force balance on the guide rod 2217. In this example, through the cooperation between the rocker arm 221, the guide rod 2217, the first spring 223 and the driving block 222, when the entire transmission structure is working in the forward direction, the driving force output by the motor 231 is transmitted in sequence by the motor 231, the worm gear 232, the driving block 222, the first spring 223, the rocker arm 221, and the optical lens 21. When the driving block 222 is subjected to the driving force, it will be constrained by the first spring 223 on the guide rod 2217. Therefore, the first spring 223 prevents the driving block 222 from having a relative displacement on the guide rod 2217, thereby transmitting the driving force to the first spring 223. The first spring 223 abuts against the side of the accommodating space 2214, and is correspondingly transmitted to the rocker arm 221. At the same time, since the torque acting between the first spring 223 and the driving block 222 belongs to the internal force of the transmission chain, the motor assembly 23 will not generate additional load in the transmission structure in the above example, and will not lose the thrust output by the motor. This means that the motor assembly 23 can smoothly adjust the angle of the optical lens 21 with a smaller driving force, thereby reducing the working current and voltage of the motor assembly 23, and the operating noise will also be controlled, and there will no longer be high selection requirements for the motor assembly 23. When the entire transmission structure works in reverse, the vibration force output by the optical lens 21 is transmitted in sequence by the optical lens 21, the rocker arm 221, the first spring 223, the drive block 222, the worm gear 232, and the motor 231. When the rocker arm 221 is subjected to the vibration force, the first spring 223 can achieve buffering between the rocker arm 221 and the drive block 222. Specifically, if the impact of the vibration force is large, there is a certain relative movement between the rocker arm 221 and the drive block 222. The first spring 223 on the guide rod 2217 will be compressed to absorb part of the vibration force, and rebound quickly so that the rocker arm 221 drives the optical lens 21 to return to its original position, thereby achieving the effect of eliminating jitter.At the same time, since the motor assembly of the worm gear combination has a self-locking characteristic, when the optical lens 21 is impacted by an external force, the worm gear is stuck and cannot move, and the corresponding drive block 222 will not move either, thereby achieving a good inhibitory effect.

[0078] like Fig. 9 As shown, in some examples, the rocker arm adopts an asymmetric design, and the rocker arm 221 is only provided at one end of the optical lens 21. The rocker arm 221 can be fixed to the rotating shaft 211 with reference to the above example. Accordingly, the optical lens 21 and the rotating shaft 211 are fixed to the inner wall of the housing of the HUD display device through the mounting base 31, so that the optical lens 21 and the rotating shaft 211 can rotate on the mounting base 31. At the same time, the motor assembly 23 is also independently fixed to the inner wall of the housing of the HUD display device, and is close to the free end of the rocker arm 221 to achieve corresponding transmission cooperation. In this example, the worm in the motor assembly 23 and the driving block in the rocker arm 221 are fixed together through gear meshing (see for details). Figure 2-4 ).by Fig. 9 Taking the placement direction of the lens driving structure as a reference, since there is only a rocker arm 221 at the left end of the optical lens 21, and the right end of the optical lens 21 only has a rotating shaft 211 symmetrical to the left end and a mounting base (not shown in the figure), the weight of the left end of the optical lens 21 is greater than that of the right end. Accordingly, the center of gravity of the optical lens after installation is located on the left side. Under the action of gravity, the left end of the optical lens 21 (including the rocker arm 221) tends to be lower than the right end of the optical lens 21, thereby improving the tightness of the matching surface between the driving block and the motor assembly 23, that is, the gear teeth on the driving block and the gear teeth on the worm are tightly meshed together, thereby eliminating the return gap during reciprocating motion, which means that the jitter between the rocker arm 221 and the motor assembly 23 is reduced, and ultimately the stability of the optical lens 21 is improved. In some examples, a second spring 24 is further provided between the rocker arm 221 and the rotating shaft 211. Specifically, one end of the second spring 24 is connected to the connecting end of the rocker arm 221, and the other end of the second spring 24 is connected to the rotating shaft 211. Therefore, there is a certain preload force between the rocker arm 221 and the rotating shaft 211, that is, there is an elastic force generated by the compression of the second spring 24 in the rotation direction of the rotating shaft 211. This elastic force can suppress the rotational jitter between the rocker arm 221 and the rotating shaft 211, and ultimately improve the stability of the optical lens.

[0079] In some examples, HUD display devices may include aftermarket and front-mounted types. Aftermarket HUD display devices are purchased separately according to the user's projection display needs after the user purchases the vehicle, and the corresponding HUD display devices are directly placed on the surface of the vehicle's center console for use. Front-mounted HUD display devices are directly embedded in the center console and need to be installed in the space reserved in the design during the vehicle production process. Fig.10As shown, for the HUD display device 100 integrated in the center console of the vehicle, in addition to including the optical engine 1, the first reflector 2, and the second reflector 3, its body is enveloped by the shell 101, and the optical engine 1 and the first reflector 2 and the second reflector 3 are accommodated in the internal space of the shell 101 and are stably fixed to the inside of the shell 101 through a bracket or the like. Figure 1 , the optical machine 1, the first reflector 2, and the second reflector 3 cooperate with each other to realize a certain optical path planning inside the shell 101, and finally project the display light through the projection window 102 opened in the shell 101. When the HUD display device 100 is embedded in the center console of the car, the projection window 102 on the shell 101 faces the vehicle windshield above the center console. Accordingly, the display light projected from the projection window 102 will be reflected on the windshield to form a virtual image visible to the human eye. Taking the first reflector 2 as an example, the bracket fixed between the first reflector 2 and the inner wall of the shell 101 may include the mounting base, rotating shaft and lens driving structure of the above examples, etc., so that not only the angle adjustment of the lens can be realized, but also any jitter generated during the driving of the vehicle can be well offset after the lens is installed.

[0080] like Fig.11 As shown, in some examples, the vehicle may be provided with the HUD display device of the above example, specifically, the HUD display device is integrated inside the center console 10, such as in front of the steering wheel. The corresponding display light is projected onto the opposite vehicle windshield 4 through the projection window 102 of the HUD display device, and the effect of the viewer observing the windshield 4 from the cockpit is that the corresponding virtual image 5 can be directly seen, for example: the virtual image 5 can include the vehicle speed (60Km / h), navigation information (forward arrow), etc. The driver as a viewer can check the corresponding vehicle status without lowering his head when driving, which improves the driving safety. Since the internal lens is fixed by a reliable lens driving structure, the virtual image 5 will not show up and down shaking during the driving process of the vehicle, which effectively guarantees the user's viewing experience. It should be noted that the vehicle in this example is not limited to a car as a means of transportation, but may also include a bus, a truck, an excavator, a motorcycle, a train, a high-speed rail, a ship, a yacht, an airplane, a spacecraft, etc. The projected windshield is not limited to the front windshield of the car, but may also be a transparent surface at other positions.

[0081] In summary, the present application sets a rocker arm as a transmission structure between the optical lens and the motor assembly to achieve angle adjustment of the optical lens, and when the rocker arm receives the driving force output by the motor assembly, it is directly obtained by the driving block on the free end of the rocker arm, and the driving block is fixed together with the rocker arm and a first spring is set therebetween for connection, so that the first spring provides the internal force on the transmission chain to achieve damping buffering of the entire lens driving structure. The present application can achieve reliable installation of the lens driving structure, avoid shaking during driving, and does not need to increase the additional load of the motor.

[0082] It should be understood that although this specification includes some examples, none of these examples contains only one independent technical solution, and this description of the specification is only for the purpose of clarity. A person skilled in the art should take the specification as a whole, and the technical solutions in each example can also be appropriately combined to form other implementation methods that can be understood by a person skilled in the art.

[0083] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present application. They are not intended to limit the scope of protection of the present application. All equivalent implementation methods or modifications that do not deviate from the teachings of the present application should be included in the scope of protection of the present application.

Claims

1. A lens driving structure, characterized in that: include: An optical lens, wherein at least one of the two ends of the optical lens is provided with a rocker arm, and the rocker arm is used to drive the angle adjustment of the optical lens under the action of a driving force; A driving block is provided on the free end of the rocker arm, and the driving block cooperates with the motor assembly to obtain the driving force output by the motor assembly. A first spring is connected between the free end of the rocker arm and the driving block, and the first spring enables the rocker arm and the driving block to be relatively fixed. The torsional direction of the first spring corresponds to the first direction of movement of the driving block under the action of the driving force.

2. The lens driving structure according to claim 1, characterized in that: The free end of the rocker arm includes a receiving space for accommodating the drive block, a guide rod is fixed between the first side and the second side of the receiving space, and the drive block is sleeved on the guide rod to limit the movement of the drive block in a second direction, which is different from the first direction.

3. The lens driving structure according to claim 2, characterized in that: The first spring enables the rocker arm and the driving block to be relatively fixed, including: The first spring is disposed between the driving block and the first side surface along the guide rod, and the driving block is pressed against the second side surface with the support of the first spring.

4. The lens driving structure according to claim 2, characterized in that: The guide rod is arc-shaped and is consistent with the movement path of the driving block under the action of the driving force.

5. The lens driving structure according to claim 1, characterized in that: The cooperation between the driving block and the motor assembly includes: The motor assembly includes a motor and a worm driven to rotate by the motor; A gear tooth is disposed on a surface of the driving block opposite to the worm, so that at least a portion of the gear tooth is meshed with the worm.

6. The lens driving structure according to claim 5, characterized in that: The gear teeth of the driving block are helical teeth.

7. The lens driving structure according to claim 1, characterized in that: At least one of the two ends of the optical lens is provided with a rocker arm, including: The rocker arm is only arranged on the first end of the optical lens, so that the rocker arm can improve the tightness of the matching surface between the driving block and the motor assembly under the action of its own gravity.

8. The lens driving structure according to claim 1, characterized in that: At least one of the two ends of the optical lens is provided with a rocker arm, including: The rocker arm is fixed to a rotating shaft extending from both sides of the optical lens, wherein the rocker arm is provided with an axial hole matching the rotating shaft, and when the axial hole is sleeved on the rotating shaft, at least a portion of the inner surface of the axial hole is abutted against at least a portion of the outer surface of the rotating shaft, so that the rocker arm rotates synchronously with the rotating shaft.

9. A display device, characterized in that: A lens driving structure comprising any one of claims 1 to 8 and an optical lens for light path planning; The lens driving structure adjusts the angle of the optical lens under the action of a motor.

10. A means of transport, characterized in that: The invention comprises the lens driving structure according to any one of claims 1 to 8 or the display device according to claim 9.

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