Virtual image display device and vehicle

Abstract

The embodiment of the utility model relates to the technical field of optical equipment, in particular to a virtual image display device and a vehicle, which comprises a shell provided with a containing cavity and a supporting table, the supporting table is fixed on the inner wall of the containing cavity, and the supporting table is provided with a rotating groove; the image generation assembly is arranged in the accommodating cavity and is used for generating an image; the optical assembly is rotationally arranged in the containing cavity and comprises an optical piece and a rotating shaft, the rotating shaft comprises a semi-column part and a semi-sphere part which are connected, and at least part of the semi-sphere part is contained in the rotating groove. By means of the mode, the virtual image display device can adjust the rotating axis of the rotating shaft and enable the rotating axis to be consistent with space coordinates of equipment where the virtual image display device is installed by means of the hemisphere portion of the rotating shaft, and the structural strength of the rotating shaft is guaranteed by means of the semi-column portion. Therefore, the virtual image display device can adjust the rotation axis to be consistent with the coordinates of the installation environment while ensuring the structural strength.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to optical equipment technical field, in particular to a kind of virtual image display device and traffic tool. BACKGROUND

[0002] Virtual image display device as a kind of display information projection on the windshield or other positions of vehicle and other traffic tools, by optical assembly, shell and image generation component constitute, shell is provided with housing cavity, image generation component and optical assembly are housed in housing cavity, and optical assembly can be rotatably arranged in housing cavity, the height of the light with image generated by optical assembly reflected by image generation component can be adjusted to windshield, to meet the use demand of different users.

[0003] The inventor of the utility model in the process of realizing the utility model, found that: at present, the optical assembly of virtual image display device is realized by setting rotating groove on the shell and matching the rotating shaft of optical assembly Rotating function, the existence of rotating shaft ensures that the image generated by virtual image display device can adjust different output height, to meet the needs of different users. The rotating axis of the existing columnar rotating shaft is consistent with the preset coordinate direction in space of virtual image display device, but in order to ensure the image display effect of virtual image display device, the installation angle when it is installed on vehicle and other traffic tools may be inclined by a certain angle relative to the spatial coordinates of vehicle and other traffic tools itself. The rotating axis of the spherical rotating shaft of virtual image display device can be adjusted due to its space rotation characteristics, so that virtual image display device can keep consistency with the spatial coordinates of vehicle and other traffic tools itself when it is installed on vehicle and other traffic tools. But the structure strength of spherical rotating shaft is insufficient, and it is easy to be broken under the action of external impact load. UTILITY MODEL CONTENT

[0004] The embodiment of the utility model provides a kind of virtual image display device, and the main technical problem to be solved is that the structure strength of rotating shaft of existing virtual image display device and the demand of keeping the consistency of installation environment spatial coordinates are difficult to match.

[0005] To solve the above technical problems, one technical scheme adopted by the utility model is: provide a kind of virtual image display device including shell, provided with housing cavity and support table, the support table is fixed to the inner wall of the housing cavity, the support table is provided with rotating groove;Image generation component, set in the housing cavity, for generating image;Optical assembly, rotatably arranged in the housing cavity, the optical assembly includes optical piece and rotating shaft, the rotating shaft includes half cylinder part and half sphere part connected, at least part of the half sphere part is housed in the rotating groove.

[0006] Optionally, a vertical cross-section shape of the rotating groove is V-shaped along a direction perpendicular to a rotating axis of the optical assembly; and / or, a cross-section shape of the rotating groove is rhombus-shaped along a direction parallel to the rotating axis of the optical assembly.

[0007] Optionally, the virtual image display device further comprises an elastic assembly, the elastic assembly is arranged on the support table, the elastic assembly covers the rotating groove, and the elastic assembly abuts against the semi-cylindrical part.

[0008] Optionally, the elastic assembly comprises a first fixing part, a second fixing part, a first elastic abutting part, and a second elastic abutting part, two ends of the first elastic abutting part are respectively fixed to the first fixing part and the second fixing part, two ends of the second elastic abutting part are respectively fixed to the first fixing part and the second fixing part, the first fixing part and the second fixing part are respectively fixed to the support table, the first elastic abutting part is closer to the rotating shaft than the second elastic abutting part, and the first elastic abutting part abuts against the rotating shaft.

[0009] Optionally, the number of the second elastic abutting parts is two, the first elastic abutting part is located between the two second elastic abutting parts, and the first elastic abutting part is arranged in a spaced manner with the second elastic abutting parts.

[0010] Optionally, the first elastic abutting part comprises a first extending part, an elastic abutting main body, and a second extending part.

[0011] One end of the first extending part is fixed to the first fixing part, the other end of the first extending part is bent and extends towards the rotating shaft, one end of the second extending part is fixed to the second fixing part, the other end of the second extending part is bent and extends towards the rotating shaft, two ends of the elastic abutting main body are respectively connected to the other end of the first extending part and the other end of the second extending part, the elastic abutting main body is closer to the rotating shaft than the second elastic abutting part, and the elastic abutting main body abuts against the rotating shaft.

[0012] Optionally, a shape of the elastic abutting main body is arc-shaped, and / or, a shape of the second elastic abutting part is arc-shaped.

[0013] Optionally, the elastic assembly comprises two screwing parts, the support table is provided with two screw holes, the two screw holes are located on two sides of the rotating groove, the first fixing part is provided with a first fixing hole, the second fixing part is provided with a second fixing hole, one of the screwing parts is screwed to one of the screw holes after passing through the first fixing hole, and the other of the screwing parts is screwed to the other of the screw holes after passing through the second fixing hole.

[0014] Optionally, the support table extends a limiting table, the limiting table is located on a side of the screw hole away from the rotating groove, and the limiting table is provided with a limiting groove; an end of the first fixing part away from the first elastic pressing piece extends a limiting part, and the limiting part is accommodated in the limiting groove.

[0015] To solve the above technical problems, the utility model adopts another technical scheme: provide a kind of traffic means, including the virtual image display device of above.

[0016] The beneficial effects of the embodiments of the utility model are as follows: different from the prior art, the virtual image display device provided by the embodiments of the utility model comprises a shell, an image generating assembly and an optical assembly, wherein the shell is provided with a receiving cavity and a support table, the support table is fixed to the inner wall of the receiving cavity, and the support table is provided with a rotating groove; the image generating assembly is arranged in the receiving cavity and is used for generating an image; the optical assembly is rotatably arranged in the receiving cavity, and the optical assembly comprises an optical component and a rotating shaft, the rotating shaft comprises a half-cylinder part and a half-sphere part connected to each other, and at least part of the half-sphere part is accommodated in the rotating groove. Through the above structure, the embodiments of the utility model can ensure that the optical component has a certain structural strength by means of the half-shaft part of the rotating shaft, and the rotating axis of the optical component can be adjusted by means of the half-sphere part of the rotating shaft, so that the rotating axis of the optical component is consistent with the spatial coordinates of the traffic means on which the virtual image display device is installed. BRIEF DESCRIPTION OF DRAWINGS

[0017] To make the technical solutions of the embodiments of the present application clearer, the drawings needed in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the drawings.

[0018] Figure 1 is an exploded schematic view of the virtual image display device provided by the embodiments of the utility model;

[0019] Figure 2 is an assembly schematic view of the virtual image display device provided by the embodiments of the utility model;

[0020] Figure 3 is a top view of the virtual image display device provided by the embodiments of the utility model;

[0021] Figure 4 is Figure 3 is a sectional view along the direction A-A in the virtual image display device;

[0022] Figure 5 is Figure 3 is a sectional view along the direction B-B in the virtual image display device;

[0023] Figure 6 is a magnified structure schematic view of an elastic assembly of a virtual image display device provided by an embodiment of the present application;

[0024] Figure 7 is Figure 1 a partial enlarged view of A part in FIG.

[0025] 1000, virtual image display device;

[0026] 1, housing; 11, accommodating cavity; 12, support table; 121, screw hole; 122, limiting table; 123, fixed table; 13, rotating groove; 13a, V-shaped groove; 13b, rhombic groove;

[0027] 2, optical assembly; 21, optical piece; 22, rotating shaft; 221, half column part; 222, half sphere part;

[0028] 3, elastic assembly; 31, first fixed part; 311, first fixed hole; 312, limiting part; 32, second fixed part; 321, second fixed hole; 33, first elastic pressing piece; 331, first extension part; 332, second extension part; 333, elastic pressing main body; 34, second elastic pressing piece; 35, screw piece;

[0029] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "vertical", "horizontal", "left", "right", and similar expressions used in the present specification are only for the purpose of illustration.

[0031] Unless otherwise defined, all technical and scientific terms used in the present specification are the same as those commonly understood by a person skilled in the art to which the present application belongs. The terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the present specification includes any and all combinations of one or more related listed items.

[0032] Virtual image display device as enough to generate and display virtual image equipment, it has been widely used in many fields, such as smart wear equipment, vehicle display system, virtual reality (VR) and augmented reality (AR) and so on. In the embodiment, the virtual image display device is applied to the vehicle display system on the vehicle.

[0033] The structure of virtual image display device mainly includes a shell, an image generating assembly and an optical assembly. The shell serves as a main support structure, the image generating assembly and the optical assembly are assembled in the shell, the image generating assembly is mainly responsible for generating the required image and displaying it to the outside world, and the optical assembly is usually composed of lenses, mirrors, light guide plates and other optical components, which are used to guide the light emitted by the image source to the surface of the object that needs to be projected in the outside world, or can also form a virtual image in space. In order to adjust the angle of the optical assembly projected to the outside world, the optical component includes a rotating shaft, but the existing rotating shaft is usually cylindrical or spherical. The rotating shaft of the cylinder has a fixed rotating axis. In different installation environments, in order to make the rotating axis of the cylinder consistent with the coordinates of the installation environment, the installation direction of the virtual image display device needs to be adjusted, which increases the difficulty of installation of the virtual image display device. The rotating shaft of the ball can adjust its rotating axis to be consistent with the coordinates of the installation environment by its unique rotating structure, but the stress area of the rotating shaft of the ball is a point contact, which has high requirements for the structural strength of the rotating shaft. The structural strength of the rotating shaft of the ball is insufficient at the connection position between the ball head and the rotating shaft, and the rotating shaft of the ball is broken and worn out and shakes when it is impacted and vibrated by the outside load.

[0034] To solve the above problems, the embodiment provides a virtual image display device 1000, please refer to Figure 1 and Figure 2 The virtual image display device 1000 includes a shell 1, an image generating assembly (not shown in the figure) and an optical assembly 2. The image generating assembly and the optical assembly 2 are arranged in the shell 1. The shell 1 provides support for the image generating assembly and the optical assembly 2, and arranges the layout of the image generating assembly and the optical assembly 2 according to actual needs. The image generating assembly is used to generate images, and the optical assembly 2 is used to deflect and project the images generated by the image generating assembly.

[0035] Specifically, the shell 1 is provided with a receiving cavity 11 and a support table 12, the image generating assembly and the optical assembly 2 are both received in the receiving cavity 11, and the receiving cavity 11 can also block external light from entering the receiving cavity 11, thereby avoiding the interference of external light on the image generated by the image generating assembly and affecting the display quality of the image, and also protecting the optical assembly 2 and the image generating assembly in the receiving cavity 11; the support table 12 is fixed to the inner wall of the receiving cavity 11, and the support table 12 is provided with a rotating groove 13; the image generating assembly is arranged in the receiving cavity 11 and generates the required image; the optical assembly 2 is rotatably arranged in the receiving cavity 11, and the optical assembly 2 comprises an optical piece 21 and a rotating shaft 22, the rotating shaft 22 comprises a half column part 221 and a half sphere part 222 connected with each other, and at least part of the half sphere part 222 is received in the rotating groove 13. The cooperation of the half sphere part 222 of the rotating shaft 22 and the rotating groove 13 can adjust the rotation axis of the optical piece 21 as needed, so that the rotation axis of the optical piece 21 is consistent with the coordinates of the installation environment; the half column part 221 of the rotating shaft 22 can ensure that the overall structural strength of the rotating shaft 22 is high enough according to its own structural characteristics, so that the rotating shaft 22 composed of the half column part 221 and the half sphere part 222 can adjust the consistency of the rotation axis and the coordinates of the installation environment while ensuring the structural strength of itself, and the installation difficulty of the virtual image display device 1000 is reduced.

[0036] It can be understood that the rotating groove 13 described above is an important structure for bearing the rotation of the rotating shaft 22, which needs to ensure the rotation of the half sphere part 222 and also needs to axially limit the half sphere part 222 of the rotating shaft 22. The shape of the rotating groove 13 includes but is not limited to V-shaped, U-shaped, etc.

[0037] For example, in some embodiments, referring to Figure 3 , Figure 4 and Figure 5 , the vertical cross-sectional shape of the rotating groove 13 is V-shaped in the direction perpendicular to the rotation axis of the optical assembly 2, and the V-shaped rotating groove 13 makes the wall surface of the rotating groove 13 in point contact with the half sphere part 222 when the half sphere part 222 is received in the rotating groove 13, and the point contact structure facilitates the rotation of the half sphere part 222 and reduces the friction; and / or, the cross-sectional shape of the rotating groove 13 is rhombus-shaped in the direction parallel to the rotation axis of the optical assembly 2.

[0038] In order to facilitate the understanding of the cooperation structure of the rotating shaft 22 and the rotating groove 13, the axial direction of the rotating shaft 22 is designated as the first direction X, the direction perpendicular to the axial direction of the rotating shaft 22 and perpendicular to the support table 12 is designated as the second direction Y, and the direction perpendicular to the first direction X and the second direction Y is designated as the third direction Z.

[0039] For the convenience of description, the rotating groove 13 with a rhombic cross-sectional area in the direction parallel to the rotating axis of the optical assembly 2 is referred to as a "rhombic groove", and the rotating groove 13 with a V-shaped vertical cross-sectional shape in the direction perpendicular to the rotating axis of the optical assembly 2 is referred to as a "V-shaped groove". In the embodiment, the rhombic groove is composed of two V-shaped grooves, specifically, one V-shaped groove is parallel to the first direction X, and the groove opening of the V-shaped groove faces the second direction Y; the other V-shaped groove is parallel to the third direction Z, and the groove opening of the V-shaped groove faces the second direction Y.

[0040] For example, referring to Figure 2 In the embodiment, the two rotating grooves 13 are a V-shaped groove 13a and a rhombic groove 13b.

[0041] It can be understood that the inner wall of the V-shaped groove 13a limits the rotating shaft 22 in the third direction Z, avoiding the unintended displacement of the rotating shaft 22 in the third direction Z; the inner wall of the rhombic groove 13b limits the rotating shaft 22 in the first direction X and the third direction Z, thereby avoiding the unintended displacement of the rotating shaft 22 in the first direction X and the third direction Z, and further restricting the movement of the entire optical assembly 2 in the first direction X.

[0042] In order to limit the rotating shaft 22 in the second direction Y, in some embodiments, referring to Figure 4 and Figure 5 The virtual image display device 1000 further comprises an elastic assembly 3, which is arranged on the support table 12, covers the rotating groove 13, and presses the half-column part 221. Thus, the elastic assembly 3 limits the half-column part 221 in the second direction Y, and further limits the rotating shaft 22 in cooperation with the rotating groove 13, allowing only rotation of the rotating shaft 22, avoiding shaking of the rotating shaft 22, thereby ensuring stability of the image projected to the outside by the optical assembly 2, and avoiding shaking.

[0043] It should be noted that the number of the rotating shafts 22 is two, and the two rotating shafts 22 are arranged at the two ends of the optical element 21. The number of the support tables 12 is two, and the layout positions of the support tables 12 correspond to the positions of the two rotating shafts 22.

[0044] It can be understood that the arrangement of the rotating shaft 22 on the optical element 21 includes but is not limited to screwing, clamping, welding, and integral molding. For example, in the embodiment, the rotating shaft 22 is integrally formed with the optical element 21, thereby improving the structural strength of the optical assembly 2 and simplifying the assembly steps of the optical assembly 2.

[0045] For the above-mentioned elastic assembly 3, referring to Figure 6The elastic assembly 3 comprises a first fixed part 31, a second fixed part 32, a first elastic pressing piece 33, and a second elastic pressing piece 34. Both ends of the first elastic pressing piece 33 are fixed to the first fixed part 31 and the second fixed part 32 respectively, so that the ability of the first elastic pressing piece 33 to bear external force is greatly improved compared with the fixed end mode. Both ends of the second elastic pressing piece 34 are fixed to the first fixed part 31 and the second fixed part 32 respectively. The first fixed part 31 and the second fixed part 32 are fixed to the support table 12 respectively, so as to fix the elastic assembly 3 to the shell 1. The first elastic pressing piece 33 is closer to the rotating shaft 22 than the second elastic pressing piece 34, and a gap is left between the first elastic pressing piece 33 and the second elastic pressing piece 34 along the second direction Y, so that the first elastic pressing piece 33 has enough space to produce elastic deformation. The first elastic pressing piece 33 presses against the rotating shaft 22, i.e. the first elastic pressing piece 33 presses against the half column part 221, so as to limit the rotating shaft 22 in the second direction Y and avoid unintended displacement of the rotating shaft 22 along the second direction Y. The elastic assembly 3 can absorb and buffer the external force received by the rotating shaft 22. Mainly because the first elastic pressing piece 33 and the second elastic pressing piece 34 can both produce elastic deformation, so that when the rotating shaft 22 is subjected to external impact load, the force received by the rotating shaft 22 can be transmitted to the first elastic pressing piece 33 and the second elastic pressing piece 34 in turn. The first elastic pressing piece 33 and the second elastic pressing piece 34 absorb and buffer the received force by producing elastic deformation.

[0046] In order to facilitate understanding of the working principle of the elastic assembly 3, a brief description is made here. The virtual image display device 1000 is a kind of equipment assembled on a vehicle and moves with the vehicle. Vibration is inevitable during the movement of the vehicle. The rotating shaft 22 is subjected to impact load along the second direction Y. When the rotating shaft 22 is subjected to force along the second direction Y, the rotating shaft 22 transmits the force to the first elastic pressing piece 33 directly abutting against the rotating shaft 22. Then the first elastic pressing piece 33 produces elastic deformation to absorb the force transmitted to the first elastic pressing piece 33 through the rotating shaft 22. If the gap between the first elastic pressing piece 33 and the second elastic pressing piece 34 disappears after the elastic deformation of the first elastic pressing piece 33, the first elastic pressing piece 33 fails to completely absorb the force, and then the second elastic pressing piece 34 produces elastic deformation to further absorb the force, thereby forming a two-stage buffer structure composed of the first elastic pressing piece 33, the gap between the first elastic pressing piece 33 and the second elastic pressing piece 34 along the second direction Y, and the second elastic pressing piece 34.

[0047] It should be noted that there is a boundary value between the force value that the first elastic pressing member 33 can withstand and the force value that the second elastic pressing member 34 can withstand. When the force that the elastic assembly 3 withstands is less than the boundary value, only the first elastic pressing member 33 is elastically deformed to absorb the force. When the force that the elastic assembly 3 withstands is greater than or equal to the boundary value, the first elastic pressing member 33 and the second elastic pressing member 34 are elastically deformed together to absorb the force. The specific boundary value is determined according to the material selection of the actual elastic assembly 3, the bending curvature of the first elastic pressing member 33 and the second elastic pressing member 34, and other factors, which will not be illustrated here.

[0048] Further, in order to facilitate the rotation of the rotating shaft 22, a lubricant is filled between the rotating shaft 22 and the elastic assembly 3, i.e. a lubricant is filled between the rotating shaft 22 and the first elastic pressing member 33, thereby reducing the friction between the rotating shaft 22 and the elastic assembly 3 and improving the service life of the rotating shaft 22 and the elastic assembly 3.

[0049] It can be understood that the number of the first elastic pressing member 33 and the second elastic pressing member 34 is a positive integer greater than or equal to one. For example, when the number of the first elastic pressing member 33 and the second elastic pressing member 34 is one, the second elastic pressing member 34 and the first elastic pressing member 33 are sequentially arranged in the direction opposite to the direction in which the elastic assembly 3 presses the rotating shaft 22, i.e. the second direction Y, and a gap is left between the first elastic pressing member 33 and the second elastic pressing member 34 for the elastic deformation of the first elastic pressing member 33. When the number of the first elastic pressing member 33 is one and the number of the second elastic pressing member 34 is two, the two second elastic pressing members 34 are arranged at intervals along the first direction X, so that an avoiding hole is formed between the two second elastic pressing members 34, and along the second direction Y, the projection of the first elastic pressing member 33 falls completely within the avoiding hole. Other number combinations and structures will not be illustrated here.

[0050] For example, in the present embodiment, please refer to Figure 6, the number of the second elastic pressing members 34 is two, the first elastic pressing member 33 is located between the two second elastic pressing members 34, and the first elastic pressing member 33 is elastically deformed to form an avoiding hole (not shown) between the two second elastic pressing members 34 in the first direction X, so that the first elastic pressing member 33 has sufficient space for elastic deformation, and the first elastic pressing member 33 is spaced apart from the second elastic pressing member 34 to form a deformation gap therebetween, so that the first elastic pressing member 33 does not collide with the second elastic pressing member 34 during deformation, thereby affecting the elastic deformation of the first elastic pressing member 33. The combination of the two second elastic pressing members 34 and the first elastic pressing member 33 forms an elastic structure that is symmetric about the central axis, which has high structural strength and can uniformly distribute external forces to the elastic assembly 3 when subjected to external forces, thereby significantly improving the service life of the elastic assembly 3.

[0051] For the first elastic pressing member 33 described above, please refer to Figure 6 , the first elastic pressing member 33 includes a first extension 331, an elastic pressing body 333, and a second extension 332; one end of the first extension 331 is fixed to the first fixed part 31, the other end of the first extension 331 is bent and extends towards the rotating shaft 22, one end of the second extension 332 is fixed to the second fixed part 32, the other end of the second extension 332 is bent and extends towards the rotating shaft 22, and the two ends of the elastic pressing body 333 are connected to the other end of the first extension 331 and the other end of the second extension 332, respectively. The elastic pressing body 333 is closer to the rotating shaft 22 than the second elastic pressing member 34, and the elastic pressing body 333 presses against the rotating shaft 22. The way the first extension 331 and the second extension 332 bend and extend towards the rotating shaft 22 can accurately guide the elastic pressing body 333 to the position of the rotating shaft 22, ensuring that it stably presses on the rotating shaft 22, thereby ensuring the stability of the rotating shaft 22 during rotation; and the first extension 331 and the second extension 332 as the main deformation part of the first elastic pressing member 33 can act as a buffer to absorb instantaneous impact force. Furthermore, the two ends of the first extension 331 are connected to the first fixed part 31 and one end of the elastic pressing body 333, respectively, and the two ends of the second extension 332 are connected to the second fixed part 32 and the other end of the elastic pressing body 333, respectively, so that the support force of the first fixed part 31 and the second fixed part 32 is dispersed and transmitted to the elastic pressing body 333, thereby making the pressure distribution of the elastic pressing body 333 acting on the rotating shaft 22 more uniform, avoiding uneven wear of the rotating shaft 22 caused by excessive local pressure, and prolonging the service life of the rotating shaft 22 and the entire optical assembly 2.

[0052] The shape of the elastic pressing body 333 and the shape of the second elastic pressing member 34 include but are not limited to flat plate, circular arc, etc.

[0053] For example, in the present embodiment, please refer toFigure 6 The shape of the elastic pressing body 333 is arc-shaped, so that the elastic pressing body 333 can be matched with the rotating shaft 22, the contact area between the elastic pressing body 333 and the rotating shaft 22 is increased, and the force applied by the elastic pressing body 333 to the rotating shaft 22 is uniformly distributed when the elastic pressing body 333 presses the rotating shaft 22, thereby further improving the ability of the elastic assembly 3 to absorb impact load.

[0054] It can be understood that the manner in which the elastic assembly 3 is arranged on the support table 12 includes but is not limited to clamping, screwing, inserting, welding, etc.

[0055] For example, in the embodiment, the elastic assembly 3 is fixed to the support table 12 by screwing. Specifically, the elastic assembly 3 includes two screwing members 35, the support table 12 is provided with two screw holes 121, the two screw holes 121 are located on the two sides of the rotating groove 13, the first fixing part 31 is provided with a first fixing hole 311, the second fixing part 32 is provided with a second fixing hole 321, one screwing member 35 passes through the first fixing hole 311 and is screwed to one screw hole 121, and the other screwing member 35 passes through the second fixing hole 321 and is screwed to the other screw hole 121. The elastic assembly 3 is fixed to the support table 12 by the screwing members 35, the connection stability of this screwing connection mode is strong, the stable work of the elastic assembly 3 is ensured, and this mode is easy to disassemble and assemble, is convenient for later maintenance and replacement, and reduces the maintenance cost.

[0056] In some embodiments, referring to Figure 7 The support table 12 extends two fixing tables 123, the two fixing tables 123 are located on the two sides of the rotating groove 13, one screw hole 121 is arranged on the end face of one fixing table 123, the fixing table 123 is arranged so that the screw hole 121 is lifted, thereby shortening the depth of the rotating groove 13, and further reducing the volume of the support table 12, thereby reducing the weight of the entire virtual image display device 1000 and reducing the manufacturing cost of the virtual image display device 1000.

[0057] Further, referring to Figure 7In order to facilitate positioning when the elastic assembly 3 is installed, the support table 12 extends a limiting table 122, the limiting table 122 is located on the side of the screw hole 121 away from the rotating groove 13, and the limiting table 122 is arranged adjacent to the fixed table 123, and the limiting table 122 is provided with a limiting groove (not marked). The end of the first fixed part 31 away from the first elastic pressing piece 33 extends a limiting part 312, and the limiting part 312 is accommodated in the limiting groove. The cooperation structure of the above-mentioned limiting part 312 and the limiting groove makes the elastic assembly 3 not need to manually align the first fixed hole 311 and the screw hole 121 when the elastic assembly 3 is fixed by the screwing piece 35. The limiting groove plays a guiding and positioning role on the limiting part 312. It only needs to ensure that the limiting part 312 is accommodated in the limiting groove, so as to realize the alignment and cooperation of the first fixed hole 311 and the screw hole 121, and improve the installation efficiency of the elastic assembly 3 by using batch production.

[0058] In some embodiments, the rotating shaft 22 is also provided with an abutting groove (not shown), the first elastic pressing piece 33 is accommodated in the abutting groove, and the first elastic pressing piece 33 abuts the bottom of the abutting groove; the cooperation structure of the abutting groove and the first elastic pressing piece 33 is used to limit the rotation angle of the optical piece 21, so as to avoid that the optical piece 21 collides with the inner wall of the accommodating cavity 11 due to too large rotation angle.

[0059] It can be understood that the length of the abutting groove along the circumference of the rotating shaft 22 is greater than the length of the first elastic pressing piece 33 along the circumference of the rotating shaft 22, so as to ensure that the first elastic pressing piece 33 can slide in the abutting groove when the rotating shaft 22 rotates. The length of the abutting groove is the sliding stroke of the first elastic pressing piece 33.

[0060] It needs to be explained that in order to ensure that the elastic deformation ability of the first elastic pressing piece 33 will not be affected by the abutting groove, the gap between the first elastic pressing piece 33 and the second elastic pressing piece 34 needs to be increased, and the increased gap width is the groove depth of the abutting groove. The specific groove depth needs to be selected in combination with the material thickness of the first elastic pressing piece 333, which will not be described here.

[0061] It can be understood that the number of the above-mentioned optical pieces 21 is greater than or equal to one. When the number of the optical pieces 21 is one, in order to realize the function that the optical piece 21 can rotate, the two ends of the optical piece 21 are provided with the rotating shaft 22; when the number of the optical pieces 21 is multiple, the rotating shaft 22 is arranged on at least one optical piece 21, so that at least one optical piece 21 can rotate, and when multiple optical pieces 21 can rotate, the multi-stage refraction or reflection of the image generated by the image generating assembly can be realized, so as to form rich projection paths.

[0062] It should be noted that when the number of optical pieces 21 is greater than one, the distribution positions of the optical pieces 21 in the accommodating cavity 11 need to be arranged in combination with the structure of the shell 1 and the preset image projection path, which will not be illustrated one by one here.

[0063] In some embodiments, in order to realize the automatic adjustment of the rotation of the optical piece 21, the virtual image display device 1000 further comprises a driving assembly (not shown in the figure), and the driving mode of the driving assembly includes but is not limited to gear and motor cooperation, motor and worm gear cooperation, motor and slider rail cooperation, etc.

[0064] In the existing virtual image display device, the image generation assembly can be divided into thin film transistor liquid crystal display (TFT-LCD), digital light processing (DLP), liquid crystal on silicon (LCOS), laser, etc. according to the image generation mode. For example, in the present embodiment, the image generation assembly adopts the TFT-LCD mode, specifically, the image generation assembly comprises a backlight piece and a display piece, and the backlight piece corresponds to the display piece.

[0065] The backlight piece will generate a large amount of heat in the actual working process, and the accumulation of heat will affect the operation of the backlight piece, so the virtual image display device 1000 further comprises a heat dissipation assembly (not shown in the figure), and the heat dissipation assembly is arranged on the image generation assembly, specifically, the heat dissipation assembly is arranged on the backlight piece.

[0066] It can be understood that the heat dissipation assembly is used to improve the heat dissipation efficiency of the backlight piece, and the heat dissipation assembly can adopt modes including but not limited to aluminum heat sink, heat dissipation fan, piezoelectric film heat sink, etc. For example, in the present embodiment, the heat dissipation assembly is an aluminum heat sink, and the aluminum heat sink is attached to the backlight piece.

[0067] For the above-mentioned shell 1, the shell 1 is further provided with a projection window, and the projection window is used for the optical assembly 2 to project the image from the projection window to the outside.

[0068] In the embodiment, the virtual image display device 1000 comprises a housing 1, an image generating assembly and an optical assembly 2, both of which are arranged in the housing 1. Specifically, the housing 1 is provided with a receiving cavity 11 and a support table 12, the support table 12 is fixed to the inner wall of the receiving cavity 11, the support table 12 is provided with a rotating groove 13 for rotating the optical assembly 2; the image generating assembly is arranged in the receiving cavity 11 and used for generating an image; the optical assembly 2 is rotatably arranged in the receiving cavity 11, and the optical assembly 2 comprises an optical piece 21 and a rotating shaft 22, the rotating shaft 22 comprises a half-cylinder part 221 and a half-sphere part 222 connected with each other, at least part of the half-sphere part 222 is arranged in the rotating groove 13, the half-sphere part 222 can rotate in the rotating groove 13, thereby driving the rotation of the optical piece 21, and the half-sphere part 222 has a structure feature that it can adjust the rotation axis of the optical piece 21 when rotating, and the half-cylinder part 221 ensures the structural strength of the whole rotating shaft 22 and improves the ability of the rotating shaft 22 to resist impact load from the outside. Through the above structure, the virtual image display device 1000 of the embodiment can realize the adjustable rotating axis of the rotating shaft 22 of the half-cylinder part 221 and the half-sphere part 222, and take into account the structural strength of the rotating shaft 22, thereby ensuring the structural strength of the virtual image display device 1000 and realizing the consistency of the rotating axis and the coordinate of the installation environment during installation.

[0069] The utility model further provides a traffic tool embodiment, traffic tool includes above-mentioned virtual image display 1000, regarding virtual image display 1000 specific structure and function please refer to above-mentioned embodiment, this place does not repeat again.

[0070] It should be noted that the specification and drawings of the utility model give the preferred embodiments of the utility model, however, the utility model can be realized by many different forms, and is not limited to the embodiments described in the specification, these embodiments are not as the additional limitation to the content of the utility model, and the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Furthermore, the above technical features continue to combine, form various embodiments not listed above, which are considered as the range of the specification of the utility model; further, for those skilled in the art, the above description can be improved or changed, and all these improvements and changes should belong to the protection scope of the attached claims of the utility model.

Claims

1. A virtual image display device, characterized in that, include, The housing has a receiving cavity and a support platform, the support platform being fixed to the inner wall of the receiving cavity, and the support platform having a rotating groove; An image generation component, disposed in the receiving cavity, is used to generate an image; An optical component is rotatably disposed in the receiving cavity. The optical component includes an optical element and a rotating shaft. The rotating shaft includes a connected semi-cylindrical portion and a hemispherical portion. At least a portion of the hemispherical portion is received in the rotating groove.

2. The virtual image display device according to claim 1, characterized in that, Along the direction perpendicular to the rotation axis of the optical component, the vertical cross-sectional shape of the rotating groove is V-shaped; And / or, along a direction parallel to the rotation axis of the optical component, the cross-sectional shape of the rotating groove is rhomboid.

3. The virtual image display device according to claim 1, characterized in that, The virtual image display device further includes an elastic component, which is disposed on the support platform, covers the rotating groove, and presses against the semi-column portion.

4. The virtual image display device according to claim 3, characterized in that, The elastic component includes a first fixing part, a second fixing part, a first elastic pressing member, and a second elastic pressing member. The two ends of the first elastic pressing member are respectively fixed to the first fixing part and the second fixing part, and the two ends of the second elastic pressing member are respectively fixed to the first fixing part and the second fixing part. The first fixing part and the second fixing part are respectively fixed to the support platform. The first elastic pressing member is closer to the rotating shaft than the second elastic pressing member, and the first elastic pressing member presses against the rotating shaft.

5. The virtual image display device according to claim 4, characterized in that, The number of the second elastic pressing members is two, and the first elastic pressing member is located between the two second elastic pressing members, with the first elastic pressing member and the second elastic pressing member being spaced apart.

6. The virtual image display device according to claim 4, characterized in that, The first elastic pressing member includes a first extension, an elastic pressing body, and a second extension; One end of the first extension is fixed to the first fixing part, and the other end of the first extension is bent and extended toward the rotating shaft. One end of the second extension is fixed to the second fixing part, and the other end of the second extension is bent and extended toward the rotating shaft. The two ends of the elastic pressing body are respectively connected to the other ends of the first extension and the second extension. The elastic pressing body is closer to the rotating shaft than the second elastic pressing member, and the elastic pressing body presses against the rotating shaft.

7. The virtual image display device according to claim 6, characterized in that, The elastic pressing body is arc-shaped, and / or the second elastic pressing member is arc-shaped.

8. The virtual image display device according to claim 4, characterized in that, The elastic component includes two screwed parts; The support platform is provided with two screw holes, which are located on both sides of the rotating groove. The first fixing part is provided with a first fixing hole, and the second fixing part is provided with a second fixing hole. One of the screw connectors passes through the first fixing hole and is screwed into one of the screw holes, and another screw connector passes through the second fixing hole and is screwed into the other screw hole.

9. The virtual image display device according to claim 8, characterized in that, The support platform extends to a limiting platform, which is located on the side of the screw hole away from the rotating groove, and the limiting platform is provided with a limiting groove. The first fixing part extends a limiting part at one end away from the first elastic pressing member, and the limiting part is received in the limiting groove.

10. A means of transportation, characterized in that, Includes the virtual image display device as described in any one of claims 1-9.

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