A head-up display device for rail transit and a light path device thereof

Abstract

The application provides a head-up display device for rail transit and a light path device thereof. The light path device comprises a base assembly comprising a base and a bottom plate, the bottom plate being movably arranged on the base; a light path assembly mounted on the bottom plate, the light path assembly being used for receiving incident light and forming a projection image; and a handle connected to the base and the bottom plate respectively, so that when the handle rotates and drives the light path assembly to move relative to the base, the receiving position of the light path assembly for receiving the incident light is adjusted, and then the display area of the projection image is adjusted, thereby avoiding the problem that the projection image cannot be displayed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of head-up display technology, in particular to a head-up display device for rail transit and a light path device thereof. BACKGROUND

[0002] The head-up display (HUD) technology is based on the principle of receiving incident light and reflecting imaging. Important driving information is projected in front of the driver's line of sight through the windshield or a specially designed transparent imaging window. The driver does not need to look down to check the instrument panel, which can avoid the distraction caused by the driver looking down at the instrument panel during driving, thereby ensuring driving safety.

[0003] In the prior art, the receiving position of the incident light of the head-up display device is generally not adjustable, which results in that the display area of the projected image cannot be adjusted, thereby possibly causing part of the projected image to be unable to be displayed. SUMMARY

[0004] The present application mainly provides a head-up display device for rail transit and a light path device thereof, which can avoid the problem that the projected image cannot be displayed.

[0005] To solve the above technical problems, one technical solution adopted by the present application is to provide a light path device for a head-up display device for rail transit, which comprises: a base assembly comprising a base and a bottom plate, the bottom plate being movably arranged on the base; a light path assembly mounted on the bottom plate, the light path assembly being used for receiving incident light and forming a projected image; and a crank connected to the base and the bottom plate respectively, so that when the crank is rotated and drives the light path assembly to move relative to the base, the receiving position of the light path assembly for receiving the incident light is adjusted.

[0006] In one specific embodiment, the light path assembly comprises a diffusion unit and a polarizing unit, the diffusion unit being arranged on the light path of the incident light to receive the incident light and form first diffused light, and the polarizing unit being arranged on the light path of the first diffused light to receive the first diffused light and form the projected image.

[0007] In one specific embodiment, the diffusion unit comprises a second mirror mechanism and a diffusion mechanism, the diffusion mechanism being arranged on the light path of the incident light to allow the incident light to pass through the diffusion mechanism and form second diffused light, and the second mirror mechanism being arranged on the light path of the second diffused light to receive the second diffused light and form the first diffused light.

[0008] In an embodiment, the polarizing unit comprises a third mirror mechanism and a polarizing mechanism, the third mirror mechanism is arranged on the light path of the first diffused light rays to receive the first diffused light rays and form third diffused light rays, and the polarizing mechanism is arranged on the light path of the third diffused light rays to make the third diffused light rays pass through the polarizing mechanism and form a projection image.

[0009] In an embodiment, the handle comprises a handle body and a screw rod body, the handle body is rotationally connected with the base, the screw rod body is fixedly connected with the handle body and penetrates through the bottom plate, so that when the handle body rotates relative to the base, the bottom plate moves along the extension direction of the screw rod body.

[0010] In an embodiment, the base assembly further comprises a limiting piece, one of the base and the bottom plate is connected with the limiting piece, and the other of the base and the bottom plate is provided with a limiting portion, and the limiting piece and the limiting portion are arranged in cooperation.

[0011] In an embodiment, the limiting portion is a limiting groove, and the limiting groove extends in the extension direction of the screw rod body.

[0012] In an embodiment, a rolling piece is arranged between the base and the bottom plate.

[0013] In an embodiment, the base is provided with a mounting groove, the rolling piece is arranged in the mounting groove and protrudes from the base, and the bottom plate is carried on the rolling piece.

[0014] To solve the above technical problems, another technical scheme adopted by the present application is to provide a head-up display device for rail transit, which comprises the optical path device.

[0015] The present application has the following beneficial effects: Different from the prior art, the optical path device provided by the embodiment of the present application comprises a base assembly comprising a base and a bottom plate, the bottom plate is movably arranged on the base; an optical path assembly is mounted on the bottom plate, the optical path assembly is used for receiving incident light rays and forming a projection image; a handle is connected with the base and the bottom plate respectively, so that when the handle rotates and drives the optical path assembly to move relative to the base, the receiving position of the optical path assembly receiving the incident light rays is adjusted, and the display area of the projection image is adjusted, thereby avoiding the problem that the projection image cannot be displayed. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0017] Figure 1 is a perspective structural schematic diagram of the head-up display device for rail transit provided in the present application;

[0018] Figure 2 is Figure 1 an exploded structural schematic diagram of the head-up display device in the present application;

[0019] Figure 3 is Figure 2 a perspective structural schematic diagram of the bottom plate assembly in the present application;

[0020] Figure 4 is Figure 3 an exploded structural schematic diagram of the bottom plate assembly in the present application;

[0021] Figure 5 is Figure 1 an optical path schematic diagram of the optical path device in the present application;

[0022] Figure 6 is Figure 2 an exploded structural schematic diagram of the light source unit in the present application;

[0023] Figure 7 is Figure 2 an exploded structural schematic diagram of the first reflecting mirror unit in the present application;

[0024] Figure 8 is Figure 2 a perspective structural schematic diagram of the diffusion unit in the present application;

[0025] Figure 9 is Figure 8 an exploded structural schematic diagram of the second reflecting mirror support in the present application;

[0026] Figure 10 is Figure 8 an exploded structural schematic diagram of the diffusion mechanism in the present application;

[0027] Figure 11 is Figure 10 a sectional schematic diagram of the diffusion mechanism and the second reflecting mirror support in the F-F direction in the present application;

[0028] Figure 12 is Figure 2 a perspective structural schematic diagram of the third reflecting mirror mechanism in the present application;

[0029] Figure 13 is Figure 4An enlarged schematic view of the middle M portion;

[0030] Figure 14 is Figure 3 An enlarged schematic view of the middle M portion;

[0031] Figure 15 is Figure 13 An enlarged schematic view of the middle M portion;

[0032] Figure 16 is Figure 3 An enlarged schematic view of the middle M portion; DETAILED DESCRIPTION

[0033] The application will be further described below in conjunction with the drawings and embodiments. It is particularly pointed out that the following embodiments are only for illustration of the application and do not limit the scope of the application. Similarly, the following embodiments are only part of the embodiments of the application, and all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0034] The terms "first", "second", "third" in the present application are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain attitude (as shown in the drawings), and if the certain attitude changes, the directional indications also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units not listed or optionally includes other steps or units inherent to the process, method, product or device.

[0035] In this document, reference to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the features, structures, or characteristics described in connection with an embodiment can be included in a different embodiment.

[0036] Please refer to the following: Figure 1 and Figure 2 , Figure 1 This is a three-dimensional structural schematic diagram of an embodiment 10 of a head-up display device for rail transit provided in the application. Figure 2 yes Figure 1 An exploded view of the head-up display device 10 in this embodiment shows that the head-up display device 10 includes an optical path device 30.

[0037] The optical path device 30 includes a base plate assembly 20 and an optical path assembly 30a.

[0038] Please refer to the following: Figure 3 and Figure 4 , Figure 3 yes Figure 2 A three-dimensional structural diagram of the midsole assembly 20. Figure 4 yes Figure 3 An exploded view of the bottom plate assembly 20, wherein the bottom plate assembly 20 forms the first light outlet 101.

[0039] Specifically, in this embodiment, the base plate assembly 20 includes a base 21 and a base plate 22. The base 21 has a first sub-port 1011 and the base plate 22 has a second sub-port 1012. The first sub-port 1011 and the second sub-port 1012 together form a first light-emitting port 101.

[0040] Please refer to the following: Figure 2 and Figure 5 , Figure 5 yes Figure 1 A schematic diagram of the optical path of the optical path device 30. The optical path component 30a is mounted on the base plate. The optical path component 30a is used to receive the incident light ray R2 and form a projected image.

[0041] The optical path assembly 30a includes a light source unit 31, a first reflector unit 32, a diffusion unit 33, and a polarizing unit 34.

[0042] In this embodiment, the light source unit 31 is connected to the base plate assembly 20 and is used to emit outgoing light rays R1. The light source unit 31 is connected to the base 21, and the base plate 22 is disposed on the side of the base 21 away from the light source unit 31.

[0043] Please see Figure 6 , Figure 6 yes Figure 2 The exploded structural diagram of the light source unit 31 shows that the light source unit 31 includes a light source housing 311 and a light source 312. The light source housing 311 forms an installation space 102 and a second light outlet 103 connected to the installation space 102. The light source 312 is disposed in the installation space 102, and the emitted light R1 emitted by the light source 312 is emitted from the light source housing 311 through the second light outlet 103.

[0044] Please see Figure 2 , Figure 5 and Figure 7 , Figure 7 is Figure 2 is a schematic diagram of a first reflecting mirror unit 32, the first reflecting mirror unit 32 and the light source unit 31 are arranged on the same side of the bottom plate assembly 20 and arranged on the light path of the emitted light R1, so that the first reflecting mirror unit 32 is arranged to receive the emitted light R1 and emit the incident light R2 toward the first light outlet 101.

[0045] Specifically, the first reflecting mirror unit 32 includes a first reflecting mirror bracket 321 and a first reflecting mirror 322, the first reflecting mirror bracket 321 is arranged on the same side of the bottom plate assembly 20 as the light source unit 31 and connected with the bottom plate assembly 20, in this embodiment, that is, the first reflecting mirror bracket 321 is connected with the base 21, the first reflecting mirror 322 is mounted on the first reflecting mirror bracket 321 and arranged on the light path of the emitted light R1, so that the first reflecting mirror 322 is arranged to receive the emitted light R1 and emit the incident light R2.

[0046] Among them, the first reflecting mirror bracket 321 includes a first clamping piece 3211 and a second clamping piece 3212, the first clamping piece 3211 is connected with the base 21 and oppositely arranged with the second clamping piece 3212, to jointly clamp the first reflecting mirror 322.

[0047] Among them, the first clamping piece 3211 is formed with a containing groove 104, the first reflecting mirror 322 is arranged in the containing groove 104, and the second clamping piece 3212 is arranged on the containing groove 104. In actual application, the first reflecting mirror 322 can be placed in the containing groove 104 first, and then the second clamping piece 3212 is arranged on the containing groove 104.

[0048] Optionally, the second clamping piece 3212 and the first clamping piece 3211 are detachably connected, such as through bolt connection. In this way, when the first reflecting mirror 322 needs to be taken out, the second clamping piece 3212 can be detached from the first clamping piece 3211, improving the convenience of disassembly.

[0049] Optionally, the first reflecting mirror 322 is arranged obliquely relative to the light path direction of the emitted light R1.

[0050] Optionally, the included angle α1 between the first reflecting mirror 322 and the light path direction of the emitted light R1 is 30°-60°, that is, 30°≤α1≤60°, such as in this embodiment, the light path direction of the emitted light R1 and the light path direction of the incident light R2 are perpendicular to each other, so α1=45°.

[0051] Please see Figure 2, Figure 5 and Figure 8 , Figure 8 yes Figure 2 A three-dimensional structural schematic diagram of the diffusion unit 33 is shown. The diffusion unit 33 is disposed on the side of the base plate assembly 20 away from the first reflector unit 32 and on the light path of the incident light ray R2, so that the diffusion unit 33 receives the incident light ray R2 and forms the first diffused light ray R3. In this embodiment, the diffusion unit 33 is connected to the base plate 22.

[0052] The diffusion unit 33 includes a diffusion mechanism 331 and a second reflector mechanism 332. The diffusion mechanism 331 is disposed on the light exit path of the incident light ray R2 so that the incident light ray R2 passes through the diffusion mechanism 331 and forms a second diffused light ray R4. The second reflector mechanism 332 is disposed on the light exit path of the second diffused light ray R4 so that the second reflector mechanism 332 receives the second diffused light ray R4 and forms a first diffused light ray R3.

[0053] The second reflector mechanism 332 includes a second reflector bracket 332a and a second reflector 332b. The second reflector 332b is mounted on the second reflector bracket 332a and forms a diffusion space 106 communicating with the first light outlet 101. The diffusion mechanism 331 is disposed in the diffusion space 106. That is, the incident light ray R2 first passes through the first light outlet 101 and is directed into the diffusion space 106. Then, the diffusion mechanism 331 in the diffusion space 106 receives the incident light ray R2, so that the incident light ray R2 passes through the diffusion mechanism 331 to form the second diffused light ray R4.

[0054] Please see Figure 9 , Figure 9 yes Figure 8 The exploded structural diagram of the second reflector bracket 332a shows that the second reflector bracket 332a is provided with a first positioning part 3321 and the second reflector 332b is provided with a second positioning part 3322. The first positioning part 3321 and the second positioning part 3322 are configured to cooperate with each other so that the second reflector 332b is mounted on the second reflector bracket 332a.

[0055] Optionally, one of the first positioning part 3321 and the second positioning part 3322 is a positioning protrusion, and the other of the first positioning part 3321 and the second positioning part 3322 is a positioning groove. In this embodiment, the first positioning part 3321 is a positioning protrusion and the second positioning part 3322 is a positioning groove.

[0056] In this embodiment, the positioning protrusion of the first positioning part 3321 is stepped, so that the second reflector 332b can be directly mounted on the second reflector bracket 332a.

[0057] Optionally, the second reflecting mirror 332b comprises a first mirror block 3323 and a second mirror block 3324, and the first mirror block 3323 and the second mirror block 3324 are arranged in a splicing manner.

[0058] Please refer to Figure 10 , Figure 10 is Figure 8 the exploded structural schematic view of the diffusion mechanism 331, the diffusion mechanism 331 comprises a carrier 3311, a cover plate 3312 and a diffusion sheet 3313, the carrier 3311 is connected with the second reflecting mirror support 332a and is formed with a mounting groove 107 and a light inlet 108 which is in communication with the mounting groove 107, the diffusion sheet 3313 is arranged in the mounting groove 107, the cover plate 3312 is arranged on the mounting groove 107 and is formed with a light transmission port 109, the incident light R2 is emitted to the diffusion sheet 3313 through the light inlet 108 and forms the second diffusion light R4, and the second diffusion light R4 is emitted to the second reflecting mirror 332b through the light transmission port 109.

[0059] Please refer to Figure 11 , Figure 11 is Figure 10 the sectional view of the diffusion mechanism 331 and the second reflecting mirror support 332a in the F-F direction, wherein the diffusion mechanism 331 is connected with the second reflecting mirror support 332a and is arranged in an adjustable manner with the second reflecting mirror support 332b.

[0060] Specifically, the second reflecting mirror support 332a is provided with an adjusting groove 110, and the second reflecting mirror mechanism 332 further comprises a fastener 332c, the fastener 332c is arranged in the adjusting groove 110 and is threadedly connected with the diffusion mechanism 331.

[0061] Optionally, the adjusting groove 110 is arranged in an extending manner along the opening direction of the first light outlet 101, so that the fastener 332c can adjust the distance between the diffusion mechanism 331 and the first light outlet 101.

[0062] Please refer to Figure 2 , Figure 5 and Figure 12 , Figure 12 is Figure 2 the three-dimensional structural schematic view of the third reflecting mirror mechanism 341, the polarizing unit 34 and the diffusion unit 33 are arranged on the same side of the bottom plate assembly 20 and are arranged on the light outlet path of the first diffusion light R3, so that the polarizing unit 34 receives the first diffusion light R3 and forms a projection image.

[0063] Specifically, the polarizing unit 34 comprises a third mirror mechanism 341 and a polarizing mechanism 342. The third mirror mechanism 341 is arranged on the light path of the first diffused light R3, so that the third mirror mechanism 341 receives the first diffused light R3 and emits the third diffused light R5. The polarizing mechanism 342 is arranged on the light path of the third diffused light R5, so that the third diffused light R5 passes through the polarizing mechanism 342 and forms a projection image.

[0064] The third mirror mechanism 341 comprises a third mirror bracket 3411 and a third mirror 3412. The third mirror 3412 is installed on the third mirror bracket 3411. The third mirror 3412 is arranged on the light path of the first diffused light R3.

[0065] The third mirror 3412 is arranged in an arc shape towards the side of the light path direction of the third diffused light R5 with respect to the first diffused light R3.

[0066] Optionally, the included angle α2 between the light path direction of the first diffused light R3 and the light path direction of the third diffused light R5 is an acute angle.

[0067] Optionally, the light path direction of the incident light R2 is parallel to the light path direction of the third diffused light R5, that is, the light path direction of the second diffused light R4 is parallel to the light path direction of the third diffused light R5.

[0068] Further referring to Figure 2 The polarizing mechanism 342 comprises an upper shell 3421 and a polarizing sheet 3422. The upper shell 3421 forms a containing space (not shown in the figure) and a mounting opening (not marked in the figure) in communication with the containing space. The third mirror mechanism 341 is arranged in the containing space. The polarizing sheet 3422 is arranged on the mounting opening and on the light path of the third diffused light R5.

[0069] Optionally, the projection area of the third mirror 3412 on the polarizing sheet 3422 is less than or equal to the planar area of the polarizing sheet 3422, so that all the third diffused light R5 can pass through the polarizing sheet 3422 to form a projection image.

[0070] Optionally, the polarizing sheet 3422 and the upper shell 3421 are adjustably arranged, so that in actual application, the position of the polarizing sheet 3422 can be adjusted according to actual conditions, thereby improving the utilization rate of the third diffused light R5.

[0071] Further referring to Figure 2 The head-up display device 10 in the embodiment further comprises a bottom shell 35 connected with the base 21 and forming a containing space 35a. The light source unit 31 and the first mirror unit 32 are arranged in the containing space 35a.

[0072] The bottom shell 35 is provided with a spacing part 351 on the side close to the accommodating space 35a, so as to divide the accommodating space 35a into a first sub-space 351a and a second sub-space 351b. The light source unit 31 is arranged in the first sub-space 351a, and the first mirror unit 32 is arranged in the second sub-space 351b.

[0073] The spacing part 351 is provided with a third light outlet 3511 which respectively communicates with the first sub-space 351a and the second sub-space 351b, so that the emergent light rays R1 emitted by the light source assembly 20 pass through the second light outlet 103 and the third light outlet 3511 in sequence and are emitted to the first mirror unit 32.

[0074] Please refer to Figure 13 , Figure 13 is Figure 4 an enlarged schematic view of the M part in FIG. 8, the bottom plate 22 is movably arranged on the base 21, so that when the bottom plate 22 moves relative to the base 21, the light path assembly 30a is driven to move relative to the base 21, thereby adjusting the receiving position of the light path assembly 30a for receiving the incident light rays R2. In this embodiment, when the bottom plate 22 moves relative to the base 21, the diffusion unit 33 and the polarizing unit 34 are driven to move relative to the base 21.

[0075] The bottom plate assembly 20 further comprises a rolling member 23 arranged between the bottom plate 22 and the base 21, so that when the bottom plate 22 moves relative to the base 21, the rolling member 23 rotates relative to the base 21, thereby reducing the resistance of the bottom plate 22 moving relative to the base 21.

[0076] The base 21 is provided with a mounting groove 211, the rolling member 23 is arranged in the mounting groove 211 and protrudes from the base 21, and the bottom plate 22 is carried on the rolling member 23.

[0077] Optionally, the number of the rolling members 23 is multiple, and the multiple rolling members 23 are arranged in central symmetry relative to the center of the bottom plate 21, thereby improving the stability of the bottom plate 22 during movement.

[0078] Please refer to Figure 13 , Figure 14 and Figure 15 , Figure 14 is Figure 3 a sectional view of the base 21 and the bottom plate 22 in FIG. 8 in the N-N direction, Figure 15 is Figure 13 a schematic view of the limiting member 24 in FIG. 8 in a three-dimensional structure, Figure 14In one optional embodiment shown, one of the base 21 and the base plate 22 is provided with a first guide portion 21a, and the other of the base 21 and the base plate 22 is provided with a second guide portion (not shown in the figure). The first guide portion 21a and the second guide portion are configured to provide guidance for the base plate 22 to move relative to the base 21.

[0079] In this configuration, one of the first guide portion 21a and the second guide portion is a guide groove, and the other of the first guide portion 21a and the second guide portion is a guide protrusion. Figure 14 In the middle, the first guide part 21a is a guide protrusion, and the second guide part is a guide groove.

[0080] Optionally, one of the first guide portion 21a and the second guide portion is provided with a first engaging portion (not shown in the figure) on the side near the guide groove, and the guide protrusion is provided with a second engaging portion 21b. The first engaging portion and the second engaging portion 21b are engaged to provide guidance for the base plate 22 to move relative to the base 21, while improving the smoothness of the movement process.

[0081] In such Figure 13 In another alternative embodiment shown, the base assembly 20 further includes a limiting member 24, which is connected to one of the base 21 and the base plate 22. The other of the base 21 and the base plate 22 is provided with a limiting part 21c, and the limiting member 24 is configured to cooperate with the limiting part 21c.

[0082] In this embodiment, the limiting part 21c is a limiting groove, which extends in the moving direction of the base plate 22.

[0083] like Figure 15 As shown, the limiting member 21c includes a connecting body 212 and a limiting body 213. The connecting body 212 is connected to one of the base 21 and the bottom plate 22 and passes through the limiting groove. The limiting body 213 is connected to the connecting body 212 on the other side of the base 21 and the bottom plate 22 away from one of the base 21 and the bottom plate 22. In this embodiment, the connecting body 212 passes through the limiting groove and is connected to the bottom plate 22, and the limiting body 213 is connected to the connecting body 212 on the side of the base 21 away from the bottom plate 22.

[0084] Furthermore, the optical path device 30 in this embodiment also includes a crank 36, which is connected to the base 21 and the base plate 22 respectively, so that when the crank 36 rotates, it drives the base plate 22 to move relative to the base 21, and drives the optical path component 30a to move relative to the base 21, thereby adjusting the receiving position of the optical path component 30a receiving the incident light R2, and thus adjusting the display area of ​​the projected image to avoid the problem of the projected image not being displayed.

[0085] For example, when the incident light R2 is incident on the center of the diffusion sheet 3313, the projection image can be fully displayed, and if the incident light R2 is incident on a position deviated from the center of the diffusion sheet 3313, the diffusion sheet 3313 cannot diffuse the incident light R2 in the partial area, and thus the projection image cannot be fully displayed. Therefore, the incident light R2 can be incident on the center of the diffusion sheet 3313 by adjusting the position of the diffusion sheet 3313.

[0086] Optionally, the number of the handles 36 can be one or more. When the number of the handles 36 is more than one, the handles 36 are arranged on different sides of the bottom plate 22.

[0087] Please refer to Figure 16 , Figure 16 is Figure 3 a perspective view of the handle, the handle 36 comprises a handle body 361 and a screw rod body 362. The handle body 361 is rotationally connected to the base 21, and the screw rod body 362 is fixedly connected to the handle body 361 and penetrates through the bottom plate 22. When the handle body 361 rotates relative to the base 21, the bottom plate 22 moves along the extension direction of the screw rod body 362.

[0088] The limiting groove of the limiting part 21c extends along the extension direction of the screw rod body 362.

[0089] The extension length of the limiting groove is less than or equal to the extension length of the screw rod body 362, so that the limiting groove can limit the stroke of the screw rod body 362, and thus limit the moving stroke of the bottom plate 22.

[0090] Different from the prior art, the optical path device provided by the embodiments of the present application comprises: a base assembly comprising a base and a bottom plate, wherein the bottom plate is movably arranged on the base; an optical path assembly mounted on the bottom plate, the optical path assembly is used for receiving incident light and forming a projection image; a handle connected to the base and the bottom plate respectively, so that when the handle rotates and drives the optical path assembly to move relative to the base, the receiving position of the incident light received by the optical path assembly is adjusted, and thus the display area of the projection image is adjusted, thereby avoiding the problem that the projection image cannot be displayed.

[0091] The above only describes some embodiments of the present application, and does not limit the protection scope of the present application. Any equivalent device or equivalent process conversion using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An optical path device for a head-up display device in rail transit, characterized in that, The optical path device includes: A base assembly includes a base and a base plate, wherein the base plate is movably disposed on the base; An optical path assembly is mounted on the base plate, and the optical path assembly is used to receive incident light and form a projected image; A crank handle is connected to the base and the base plate respectively, so that when the crank handle rotates and drives the optical path assembly to move relative to the base, the receiving position of the optical path assembly receiving the incident light is adjusted. The optical path assembly includes a diffusion unit and a polarizing unit. The diffusion unit is disposed on the light exit path of the incident light to receive the incident light and form a first diffused light. The polarizing unit is disposed on the light exit path of the first diffused light to receive the first diffused light and form a projected image. The crank handle includes a crank handle body and a lead screw body. The crank handle body is rotatably connected to the base, and the lead screw body is fixedly connected to the crank handle body and passes through the base plate, so that when the crank handle body rotates relative to the base, the base plate moves along the extension direction of the lead screw body.

2. The optical path device according to claim 1, characterized in that, The diffusion unit includes a second reflector mechanism and a diffusion mechanism. The diffusion mechanism is disposed on the light exit path of the incident light so that the incident light passes through the diffusion mechanism and forms a second diffused light. The second reflector mechanism is disposed on the light exit path of the second diffused light so as to receive the second diffused light and form a first diffused light.

3. The optical path device according to claim 2, characterized in that, The polarizing unit includes a third reflector mechanism and a polarizing mechanism. The third reflector mechanism is disposed on the light-out path of the first diffused light to receive the first diffused light and form a third diffused light. The polarizing mechanism is disposed on the light-out path of the third diffused light so that the third diffused light passes through the polarizing mechanism and forms a projected image.

4. The optical path device according to claim 1, characterized in that, The base assembly further includes a limiting member, which is connected to one of the base and the bottom plate. The other of the base and the bottom plate is provided with a limiting part, and the limiting member is configured to cooperate with the limiting part.

5. The optical path device according to claim 4, characterized in that, The limiting part is a limiting groove, which extends toward the extension direction of the lead screw body.

6. The optical path device according to claim 1, characterized in that, A rolling element is provided between the base and the bottom plate.

7. The optical path device according to claim 6, characterized in that, The base is provided with a mounting groove, the rolling element is disposed in the mounting groove and protrudes from the base, and the base plate is supported on the rolling element.

8. A head-up display device for rail transit, characterized in that, The head-up display device includes the optical path device according to any one of claims 1 to 7.

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