Transmission structure, display device and vehicle

Abstract

The utility model relates to the technical field of projection display, in particular to a transmission structure, display equipment and a vehicle. The transmission structure comprises an optical lens and a motor assembly, the optical lens comprises a connecting part matched with the motor assembly, and the motor assembly comprises a driving part matched with the optical lens; transmission of driving force is achieved between the connecting part and the driving part through matching of a ball head and a ball head groove, the ball head comprises a first ball head and a second ball head which are oppositely arranged, a first gap is formed between the first ball head and the second ball head, the ball head groove comprises a first side face and a second side face which are oppositely arranged, and a second gap is formed between the first side face and the second side face. When the ball head is located in the ball head groove, the first ball head abuts against the first side face, and the second ball head abuts against the second side face. The positioning accuracy of the optical lens installed in the HUD display device can be enhanced, the lens fixing stability is improved, and abnormal sound generated by lens shaking is reduced.

Description

Technical Field

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

[0002] HUD (Head Up Display) is a new way to realize on-board 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 use the motor assembly to achieve angle adjustment. However, due to processing and installation tolerances and other reasons, the optical lens will make abnormal noises due to displacement or shaking when it is fixed or rotated, which will cause a bad experience for users. Summary of the invention

[0003] The purpose of this application is to provide a transmission structure, a display device and a vehicle, which solve the technical problems in the prior art that the optical lenses in the HUD display device have poor fixing stability and jitter that affects the user experience.

[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 transmission structure, comprising:

[0006] An optical lens and a motor assembly, wherein the optical lens comprises a connecting portion cooperating with the motor assembly, and the motor assembly comprises a driving portion cooperating with the optical lens;

[0007] The driving force is transmitted between the connecting part and the driving part through the cooperation between the ball head and the ball head groove, so that the angle of the optical lens can be adjusted under the action of the driving force;

[0008] Among them, the ball head includes a first ball head and a second ball head that are arranged opposite to each other, and there is a first gap between the first ball head and the second ball head. The ball head groove includes a first side surface and a second side surface that are arranged opposite to each other. When the ball head is in the ball head groove, the first ball head abuts against the first side surface, and the second ball head abuts against the second side surface.

[0009] In an optional implementation of the first aspect, the optical lens realizes angle adjustment under the action of the driving force, including:

[0010] The optical lens rotates around a fixed rotation axis.

[0011] In an optional implementation of the first aspect, the first ball head and the second ball head are respectively hemispherical.

[0012] In an optional implementation of the first aspect, the sizes of the first ball head and the second ball head in the absence of external force are larger than the second gap between the first side surface and the second side surface.

[0013] In an optional implementation of the first aspect, the first side surface and the second side surface extend from the inner wall of the ball head groove to the inner space of the ball head groove, and form a certain angle with the inner wall of the ball head groove.

[0014] In an optional implementation of the first aspect, a first spring is respectively connected between the first side surface, the second side surface and the inner wall of the ball head groove to provide elastic force of the first side surface and the second side surface to the inner space of the ball head groove.

[0015] In an optional implementation of the first aspect, at least a portion of the connecting clamp of the first ball head and the second ball head outside the ball head groove is at a certain angle.

[0016] In an optional implementation of the first aspect, a second spring is arranged in the first gap, and the second spring is connected between the first ball head and the second ball head to provide an elastic force of the first ball head toward the first side surface and an elastic force of the second ball head toward the second side surface.

[0017] In an optional implementation of the first aspect, the ball head is arranged on the connecting portion, and the ball head groove is arranged on the driving portion.

[0018] In an optional implementation of the first aspect, the ball head is arranged on the driving part, and the ball head groove is arranged on the connecting part.

[0019] In an optional implementation of the first aspect, the driving portion is sleeved on the worm of the motor assembly, the worm performs rotational motion under the drive of the motor, and drives the driving portion to convert the rotational motion into linear motion.

[0020] In an optional implementation of the first aspect, the motor assembly further includes a touch switch for locating a position of the driving portion relative to the worm.

[0021] In a second aspect, the present application provides a display device, including the transmission structure and motor described in the first aspect, and an optical lens for light path planning;

[0022] The motor acts on the optical lens through the transmission structure to achieve angle adjustment of the optical lens.

[0023] In a third aspect, the present application provides a means of transportation, comprising the transmission structure described in the first aspect or the display device described in the second aspect.

[0024] Compared with the prior art, the present application transmits the driving force between the optical lens and the optical machine assembly through the matched ball head and the ball head slot, and the ball head adopts two separately arranged hemisphere heads to realize the elastic force between each other, and uses the first gap between the two ball heads to adjust the size in the ball head slot to achieve interference fit, improve the holding force in the ball head slot, and enhance the stability of the connection. The present application can enhance the positioning accuracy of the optical lens installed in the HUD display device, improve the stability of the lens fixation, and reduce the abnormal noise caused by the lens shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] Figure 1 Schematic diagram of HUD projection display in some examples of this application.

[0027] Figure 2 Schematic diagram of the transmission structure in some examples of this application.

[0028] Figure 3 Schematic diagram of the optical lens structure in some examples of this application.

[0029] Figure 4 Schematic diagram of the connection structure of optical lenses in some examples of this application.

[0030] Figure 5 Schematic diagram of the transmission structure in some examples of this application.

[0031] Figure 6 Schematic diagram of the transmission structure in some examples of this application.

[0032] Figure 7 Schematic diagram of the transmission structure in some examples of this application.

[0033] Figure 8 This is a schematic diagram of the HUD display device structure in some examples of this application.

[0034] Fig. 9 This is a schematic diagram of projection display in a vehicle in some examples of the present application.

[0035] Figure Number:

[0036] 1 Optical machine 2 First reflector 3 Second reflector

[0037] 4 Windshield 5 Virtual image 6 Human eye

[0038] 10 center console 100 HUD display device 101 housing

[0039] 102 projection window 20 optical lens 201 connection part

[0040] 202 Ball head 2021 First ball head 2022 Second ball head

[0041] 2023 first gap 203 reinforcing rib 21 rotating shaft

[0042] 30 Motor assembly 301 Driving unit 302 Ball head slot

[0043] 3021 first side surface 3022 second side surface 3023, 3024 spring

[0044] 3025 inner wall 303 worm 304 guide rod

[0045] 305 bracket 31 motor DETAILED DESCRIPTION

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] by Figure 1 Taking the first reflector 2 in the projection display as an example, in actual projection display applications, the optical lens needs to adjust the angle to change the path of light transmission, thereby changing the projection position on the windshield. When the projection display is turned off or sunlight backflow occurs, the optical lens needs to be adjusted to a specific angle to prevent the optical lens from facing the external light and directing it to the internal image source surface. Figure 2As shown, in order to cooperate with the angle adjustment of the optical lens 20, the optical lens 20 can be fixed on the inner wall of the shell of the HUD display device through the rotating shaft 21. Specifically, the rotating shaft 21 can be arranged on the lens back plate in cooperation with the lens back plate of the optical lens 20, and the rotating shaft 21 is fixed on the mounting base on the inner wall of the shell, and the optical lens 20 can rotate up and down around the rotating shaft 21. In order to control the directional adjustment of the optical lens 20, the motor assembly 30 is required to cooperate with it. The motor in the motor assembly 30 is responsible for outputting the driving force required for the angle adjustment. Correspondingly, the motor assembly 30 includes a motor, a turbine, a worm and a driving part 301, etc. The worm can achieve corresponding rotational movement under the action of the motor driving force. The optical lens 20 includes a connecting part 201, and the setting position of the connecting part 201 can be the bottom of the optical lens 20, that is, the free end rotating around the rotating shaft 21. Optionally, the connecting part 201 is specifically arranged on any one of the two sides of the bottom. The driving part 301 and the connecting part 201 are relatively fixed. When the driving part 301 moves, it can drive the connecting part 201 to move, thereby transmitting the driving force output by the motor to the connecting part 201 and controlling the rotation of the optical lens 20. The transmission structure will be described in detail below.

[0051] In some examples, such as Figure 3 As shown, the connecting portion 201 of the optical lens 20 extends from the bottom of the optical lens 20, so as to facilitate assembly with the optical-mechanical components. A ball head 202 is provided on the connecting portion 201. In this example, the ball head 202 cooperates with the ball head groove to realize the transmission of the driving force. Correspondingly, a matching ball head groove is provided on the driving portion, which can convert the linear motion of the driving portion into the circular motion of the connecting portion 201. Optionally, a ball head groove may be provided on the connecting portion 201, and a ball head may be correspondingly provided on the driving portion. Both of them also realize the transmission of the driving force through the cooperation between the ball head and the ball head groove. As shown Figure 4As shown, in order to improve the strength of the ball head 202 fixed on the connecting part 201, a reinforcing rib 203 is also provided on the side of the ball head 202 facing the connecting part 201. Specifically, the ball head 202 is fixed to the side of the connecting part 201 through the connecting shaft, and a part of the reinforcing rib 203 is connected to the connecting shaft surface of the ball head 202, and a part of the reinforcing rib 203 is connected to the side of the connecting part 201, that is, the reinforcing rib 203 is between the connecting shaft and the connecting part 201. Optionally, a plurality of reinforcing ribs 203 can be provided around the surface of the connecting shaft. Due to the stability of the reinforcing ribs 203, the ball head 202 can resist strong external forces, such as the driving force output by the motor assembly. In some examples, the ball head 202 specifically includes a first ball head 2021 and a second ball head 2022 that are relatively arranged. The first ball head 2021 and the second ball head 2022 are separately arranged relative to the outside of the connecting part 201, that is, the parts inserted into the ball head groove are separately arranged to adapt to the internal dimensions of the ball head groove, and the first ball head 2021 and the second ball head 2022 are integrally formed relative to the inside of the connecting part 201, so that the first ball head 2021 and the second ball head 2022 are clamped at a certain angle and have a certain elastic force. Correspondingly, there is a first gap 2023 between the first ball head 2021 and the second ball head 2022. Therefore, when the first ball head 2021 and the second ball head 2022 are subjected to external force, such as the squeezing of the ball head 202 by the ball head groove, the first ball head 2021 and the second ball head 2022 can be brought closer to each other, and the first gap 2023 is reduced accordingly. When the external force disappears, such as the ball head 202 is taken out of the ball head groove, the first ball head 2021 and the second ball head 2022 will be restored to their default positions due to their own elastic force, and the first gap 2023 will also be restored to its default size, so that they can cooperate well with the ball head groove, which will be described in detail below. Optionally, the first ball head 2021 and the second ball head 2022 are respectively hemispherical, and the two hemispheres together form a complete spherical ball head. The surfaces of the two ball heads are aligned to ensure smooth rotation in the ball head groove. Optionally, lubricating oil can be applied between the ball head 202 and the ball head groove to reduce the friction between the two.

[0052] like Figure 5As shown, the driving part 301 is arranged on the worm 303 of the motor assembly 30. Specifically, the driving part 301 includes a through guide hole, the inner surface of the guide hole has a thread that matches the outer surface of the worm 303, and the driving part 301 is just sleeved on the worm 303 through the guide hole. When the worm 303 rotates under the drive of the motor, the threaded match between the worm 303 and the driving part 301 can control the back and forth movement of the driving part 301. Correspondingly, the driving part 301 includes a ball head groove 302 that matches the ball head 202. After installation, the ball head 202 just abuts against the inside of the ball head groove 302. As the driving part 301 moves, the ball head 202 abutting against the inside will also move. In this example, the ball head 202, the connecting part 201, the optical lens, etc. are integrally formed, so the entire optical lens will rotate around the rotation axis, and in order to adapt to the angle adjustment of the optical lens, the ball head 202 will also rotate in the ball head slot 302 to adapt to different angles. Accordingly, the connecting axis between the ball head 202 and the connecting part 201 can be parallel to the rotation axis 21 through which the optical lens 20 passes, so that the direction of the force driving the optical lens 20 is consistent with the direction of the circular motion of the optical lens 20.

[0053] In some examples, such as Figure 6 As shown, the motor assembly 30 includes a motor 31 and a bracket 305 connected to the motor 31, and a worm 303 and a guide rod 304 are respectively arranged on the bracket 305. The worm 303 is connected to the motor 31 and can rotate under the drive of the motor 31. The guide rod 304 is arranged in parallel with the worm 303 to limit the driving part 301. Specifically, the driving part 301 is respectively sleeved on the worm 303 and the guide rod 304. As described above, the driving part 301 will cooperate with the worm 303, and when the driving part 301 is subjected to the rotation effect of the worm 303, it will also be limited by the guide rod 304, so it will not rotate with the worm 303, but will only make linear motion along the guide rod 304. The rotation direction of the worm 303 determines the direction of the linear motion of the driving part 301 on the guide rod 304. Accordingly, the direction of the worm 303 is perpendicular to the direction of the rotating shaft 21, so that the movement direction of the driving unit 301 on the worm 303 is consistent with the direction of the circular motion of the optical lens 20. Optionally, the motor assembly 30 is also provided with a touch switch on at least one end of the guide rail 304. When the driving unit 301 reaches the two end positions, the driving unit 301 will come into contact with the touch switch, and the touch switch will generate a trigger signal to the processor of the HUD display device, indicating that the driving unit 301 has reached the limit position, thereby controlling the motor 31 to rotate in the opposite direction, so that the driving unit 301 also moves in another direction.

[0054] In some examples, the driving part 301 includes a ball head groove 302 disposed on the worm 303, which cooperates with the optical lens disposed on the upper part. It should be noted that the "upper" and "lower" positions referred to in each example are Figure 2 The ball head slot 302 includes a surrounding inner wall 3025, and an opening is left at least in the connection direction between the ball head 202 and the connecting part 201, so that the ball head 202 can extend to the outside of the inner wall 3025 after being installed in the ball head slot 302. Optionally, the inner wall 3025 is also provided with an opening in the upward direction, so that the ball head 202 can be conveniently installed in the ball head slot 302. The ball head 202 can be well received in the inner wall 3025 of the ball head slot 302, so that the driving force can be stably transmitted between the driving part 301 and the connecting part 201, and the ball head 202 can be prevented from falling off from the ball head slot 302. In some examples, the ball head 202 installed in the ball head slot 302 can rest against the inner wall 3025 of the ball head slot 302, that is, the first side surface of the ball head 202 and the second side surface is part of the inner wall surface of the ball head slot 302 itself, so that when the driving part 301 moves, the ball head slot 302 can push the ball head 202 to move, thereby causing the connecting part 201 and the optical lens 20 to rotate. In some examples, the first side 3021 and the second side 3022 extend from the inner wall 3025 of the ball head slot 302 to the internal space of the ball head slot 302, so that the first side 3021 and the second side 3022 are respectively at a certain angle with the inner wall 3025 of the ball head slot 302 in the internal space of the ball head slot 302, that is, they can be in an inverted "U" shape. This angle can make the first side 3021 and the second side 3022 have a certain elastic force relative to the inner wall 3025, and the applied external force can make the first side 3021 and the second side 3022 approach the inner wall 3025. After the applied external force disappears, the corresponding elastic force can make the first side 3021 and the second side 3022 return to the original angle. Optionally, in order to increase the elastic force between the first side surface 3021 and the second side surface 3022 and the inner wall 3025 respectively, a spring 3023 is further provided between the first side surface 3021 and the inner wall 3025, and a spring 3024 is further provided between the second side surface 3022 and the inner wall 3025. When the first side surface 3021 approaches the inner wall 3025 and the second side surface 3022 approaches the inner wall 3025, in addition to the elastic force of the first side surface 3021 and the second side surface 3022 structures themselves, the spring 3023 and the spring 3024 will also generate elastic force supporting the first side surface 3021 and the second side surface 3022 under the action of compression, so that the first side surface 3021 and the second side surface 3022 can be assisted to restore to the original angle after the external force is lost, and provide an inward resisting force when the external force exists.

[0055] In this example, since there is a certain second gap between the first side surface 3021 and the second side surface 3022, it can be used as a slot space for receiving the ball head 202. When the ball head 202 is placed in the ball head slot 302, it actually abuts between the first side surface 3021 and the second side surface 3022. Figure 7 As shown, when the ball head 202 is placed into the second gap between the first side surface 3021 and the second side surface 3022, the separately arranged first ball head 2021 and the second ball head 2022 are squeezed by the force of the first side surface 3021 and the second side surface 3022, and the first ball head 2021 and the second ball head 2022 will slightly approach the first gap between the first ball head 2021 and the second ball head 2022 to adapt to the space corresponding to the second gap, that is, the size of the first ball head 2021 and the second ball head 2022 in the absence of external force is slightly larger than the size of the second gap between the first side surface 3021 and the second side surface 3022. The first ball head 2021 and the second ball head 2022 will have an outward elastic force under extrusion. At the same time, the first side surface 3021 and the second side surface 3022 will also have an inward elastic force under extrusion. The two elastic forces are in opposite directions, so that the first ball head 2021 just abuts against the first side surface 3021, and the second ball head 2022 just abuts against the second side surface 3022. In this way, the entire ball head 202 will be stably fixed in the ball head groove 302, while also supporting free rotation in the ball head groove 302. In some examples, in order to increase the elastic force of the first ball head 2021 and the second ball head 2022 against the first side surface 3021 and the second side surface 3022 respectively, a spring may be connected between the first ball head 2021 and the second ball head 2022, that is, the spring is arranged in the first gap between the first ball head 2021 and the second ball head 2022, and the spring can provide an outward elastic force after being compressed, that is, the first ball head 2021 in the direction of the first side surface 3021, and the second ball head 2022 in the direction of the second side surface 3022, thereby further improving the stability of the ball head 202 fixed in the ball head slot 302 on the basis of the elastic restoring force of the ball head 202 itself.

[0056] 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. Figure 8 As 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 housing 101, and finally project the display light through the projection window 102 opened in the housing 101. When the HUD display device 100 is embedded in the center console of the car, the projection window 102 on the housing 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 housing 101 may include the mounting base, rotating shaft, motor assembly and transmission structure of the above examples, so that not only the angle adjustment of the lens can be realized, but also the installation of the optical lens inside the housing 101 is simple and convenient, and the optical lens inside the housing 101 can be prevented from shaking, and the display picture projected on the windshield will also show an extremely stable effect.

[0057] like Fig. 9 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. Further, since the lens and the motor assembly inside the HUD display device are fixed by a reliable transmission structure, the lens can be well fixed, and the virtual image 5 projected on the windshield 4 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 can 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 can also be a transparent surface in other locations.

[0058] In summary, the present application transmits driving force between the optical lens and the optical machine assembly through the mating ball head and the ball head slot, and the ball head uses two separately arranged hemispheres to realize the elastic force between each other, and uses the first gap between the two ball heads to adjust the size in the ball head slot to achieve interference fit, improve the holding force in the ball head slot, and enhance the stability of the connection. The present application can enhance the positioning accuracy of the optical lens installed in the HUD display device, improve the stability of the lens fixation, and reduce the abnormal noise caused by the lens shaking.

[0059] 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.

[0060] 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 transmission structure, characterized in that: include: An optical lens and a motor assembly, wherein the optical lens comprises a connecting portion cooperating with the motor assembly, and the motor assembly comprises a driving portion cooperating with the optical lens; The driving force is transmitted between the connecting part and the driving part through the cooperation between the ball head and the ball head groove, so that the angle of the optical lens can be adjusted under the action of the driving force; Among them, the ball head includes a first ball head and a second ball head that are arranged opposite to each other, and there is a first gap between the first ball head and the second ball head. The ball head groove includes a first side surface and a second side surface that are arranged opposite to each other. When the ball head is in the ball head groove, the first ball head abuts against the first side surface, and the second ball head abuts against the second side surface.

2. The transmission structure according to claim 1, characterized in that: The first ball head and the second ball head are respectively hemispherical.

3. The transmission structure according to claim 1, characterized in that: The sizes of the first ball head and the second ball head when no external force is applied are larger than the second gap between the first side surface and the second side surface.

4. The transmission structure according to claim 1, characterized in that: The first side surface and the second side surface extend from the inner wall of the ball head groove to the inner space of the ball head groove, and form a certain angle with the inner wall of the ball head groove.

5. The transmission structure according to claim 4, characterized in that: A first spring is respectively connected between the first side surface, the second side surface and the inner wall of the ball head groove to provide elastic force of the first side surface and the second side surface toward the inner space of the ball head groove.

6. The transmission structure according to claim 1, characterized in that: At least a portion of the connecting clip of the first ball head and the second ball head outside the ball head groove is at a certain angle.

7. The transmission structure according to claim 6, characterized in that: A second spring is arranged in the first gap, and the second spring is connected between the first ball head and the second ball head to provide an elastic force of the first ball head toward the first side surface and an elastic force of the second ball head toward the second side surface.

8. The transmission structure according to claim 1, characterized in that: The ball head is arranged on the connecting portion, and the ball head groove is arranged on the driving portion.

9. A display device, characterized in that: It comprises the transmission structure and motor according to any one of claims 1 to 8, and an optical lens for light path planning; The motor acts on the optical lens through the transmission structure to achieve angle adjustment of the optical lens.

10. A means of transport, characterized in that: It includes the transmission structure described in any one of claims 1 to 8 or the display device described in claim 9.

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