Head-up display

Abstract

To provide a head-up display which can inhibit lifting of a cover while inhibiting increase in size.SOLUTION: A head-up display 1 includes: a second housing 20 including a wall 21; and a plate-shaped cover 40 supported by a placement surface 120 of the housing (second housing 20) and covering a second opening 22 of the housing. The wall 21 includes: a pair of first extensions 21a extending along an X-axis direction; a pair of second extensions 21b extending along a Y-axis direction; and a plurality of claw parts 24 disposed along the wall 21. The cover 40 includes a plurality of first engagement portions 41 which are formed corresponding to the plurality of claw parts 24. The plurality of claw parts 24 include pressers protruding from the wall 21 toward the second opening 22. The second housing 20 holds the cover 40 in a curved state by surrounding the cover with the pair of first extensions 21a and the pair of second extensions 21b and sandwiching the cover 40 between the placing surface 120 and the pressers engaged with the plurality of first engagement portions 41.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to head-up displays. [Background technology]

[0002] Patent Document 1 discloses a projection device that is mounted on a vehicle and is capable of projecting images. The projection device includes a housing having a wall with an opening that allows display light to pass to the outside, and a light-transmitting plate-like cover that closes the opening from the outside. The wall has a pair of edges extending along a first direction and a plurality of claws arranged on each of the pair of edges along the first direction. The cover has a plurality of through holes arranged corresponding to the plurality of claws. The claws have bases that protrude outward from the edges and pressing portions that protrude from the tip of the base along the first direction. The housing holds the cover by sandwiching the cover between the pressing portions inserted into the through holes and the edges. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-123194 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, when attaching a cover to a housing of a head-up display, the cover may be attached to the housing using a separate member such as double-sided tape or pins. In this case, jigs and pressure equipment are required, which increases the equipment costs and assembly labor, and the cost of materials for the separate members is required, resulting in high costs. In addition, the external dimensions of the wall portion where the opening for the head-up display is provided become larger, which may impair the vehicle's mountability and the exterior design of the dashboard (also called the instrument panel).

[0005] In response to this, the projection device in Patent Document 1 discloses a configuration in which the cover is held to the housing by being sandwiched between a pressing portion inserted into the through-hole and the edge, but if the cover is pressed from the outside or is continuously exposed to a high temperature environment, the cover may deform and lift off the edge. In this case, the quality of the cover is reduced, and a gap is formed between the cover and the edge, allowing dust and dirt to enter through this gap.

[0006] Therefore, the present disclosure provides a head-up display that can suppress an increase in size and prevent the cover from floating up. [Means for solving the problem]

[0007] A head-up display according to one aspect of the present disclosure is a head-up display that is mounted on a vehicle, projects image light onto an object that is capable of transmitting and reflecting light, and forms a virtual image of the object on the side opposite to a viewer, and includes: an image generating device for projecting the image light onto the object; a housing that houses the image generating device, has an opening formed therein that allows the image light to pass to the outside, and has wall portions arranged around the opening; and a plate-like cover that is supported on a mounting surface of the housing and covers the opening, wherein the wall portions are formed with a pair of first extension portions that face each other across the opening and extend along a first direction; The cover has a pair of second extensions extending along a second direction different from the first direction, and a plurality of claw portions arranged along the wall portion, the pair of first extensions being curved so as to approach the image generating device, the cover has a plurality of first engagement portions formed corresponding to the plurality of claw portions, and the plurality of claw portions have pressing portions protruding from the wall portion so as to approach the opening, and the housing is surrounded by a pair of first extensions and a pair of second extensions, and the cover is sandwiched between the pressing portions engaged with the plurality of first engagement portions and the placement surface to hold the cover in a curved state. [Effects of the Invention]

[0008] According to the head-up display of the present disclosure, it is possible to suppress an increase in size while suppressing lifting of the cover. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing a head-up display according to an embodiment mounted on a vehicle. [Figure 2] FIG. 2 is a perspective view showing a head-up display according to the embodiment. [Figure 3] FIG. 3 is an exploded perspective view showing a cover and a second housing of the head-up display according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing the windshield and the head-up display. [Figure 5] FIG. 5 is a partial plan view showing a part of the second housing including the wall portion, the placement surface, the plurality of claw portions, the protrusions, and the like. [Figure 6] FIG. 6 is a perspective view showing the first claw portion and the first engagement portion. [Figure 7] 7 is a cross-sectional view showing the first hook portion and the first engagement portion shown along the line A2-A2 in FIG. [Figure 8] 8 is a cross-sectional view showing the cover, the wall of the second housing, and the drainage structure of the second housing, taken along the line A1-A1 in FIG. [Figure 9] FIG. 9 is an explanatory diagram showing how the cover is attached to the second housing. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, the embodiments will be specifically described with reference to the drawings.

[0011] The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, components, arrangement positions and connection forms of the components, etc. shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Furthermore, among the components in the following embodiments, components that are not recited in the independent claims are described as optional components.

[0012] Furthermore, each figure is a schematic diagram and is not necessarily an exact illustration. Therefore, for example, the scales of the figures do not necessarily match. Furthermore, in each figure, substantially the same components are given the same reference numerals, and redundant explanations are omitted or simplified.

[0013] In the following embodiments, in Fig. 2, the front side of the vehicle is defined as the positive X-axis direction, the right side when viewed along the front of the vehicle is defined as the positive Y-axis direction, and the direction perpendicular to the positive X-axis and positive Y-axis directions, and vertically upward, is defined as the positive Z-axis direction. The directions in Fig. 2 also apply to Fig. 3 and subsequent figures.

[0014] Furthermore, in the following embodiments, expressions such as X-axis direction, rectangular shape, and approximately parallel are used. For example, X-axis direction does not only mean the perfect X-axis direction, rectangular shape means a perfect rectangle, and approximately parallel means completely parallel, but also means substantially X-axis direction, substantially rectangular, and substantially parallel, that is, including an error of, for example, a few percent. Furthermore, X-axis direction, rectangular shape, and approximately parallel mean X-axis direction, rectangular shape, and approximately parallel within the range in which the effects of the present disclosure can be achieved. The same applies to other expressions using "direction," "shape," and "approximately."

[0015] (Embodiment) <Configuration> Hereinafter, the head-up display 1 of the present disclosure will be specifically described with reference to FIGS.

[0016] FIG. 1 is a perspective view showing a head-up display 1 according to an embodiment mounted on a vehicle 2. FIG. 2 is a perspective view showing the head-up display 1 according to the embodiment. FIG. 3 is an exploded perspective view showing a cover 40 and a second housing 20 of the head-up display 1 according to the embodiment. FIG. 4 is a cross-sectional view showing a windshield 3 and the head-up display 1. FIG. 5 is a partial plan view showing a part of the second housing 20 including the wall portion 21, the mounting surface 120, the plurality of claw portions 24, and the protrusions 25. FIG. 6 is a perspective view showing the first claw portion 24a and the first engagement portion 41. FIG. 7 is a cross-sectional view showing the first claw portion 24a and the first engagement portion 41 shown along the A2-A2 line in FIG. 6. FIG. 8 is a cross-sectional view showing the cover 40, the wall portion 21 of the second housing 20, and the drainage structure 26 of the second housing 20 shown along the A1-A1 line in FIG. 2. FIG. 9 is an explanatory diagram showing how the cover 40 is attached to the second housing 20. 9A shows a state in which the cover 40 is placed on the placement surface 120 of the second housing 20 with the claws 24 engaged with the first engagement portions 41 and the protrusions 25 engaged with the second engagement portions 42. FIG. 9B is a cross-sectional view taken along line BB in FIG. 9A. FIG. 9C is a cross-sectional view taken along line CC in FIG. 9A. FIG. 9D shows a state in which the cover 40 is slid in the positive direction of the Y axis from the state in FIG. 9A, and is sandwiched between the plurality of claws 24 and the placement surface 120 of the second housing 20. FIG. 9E is a cross-sectional view taken along line EE in FIG. 9D. FIG. 9F is a cross-sectional view taken along line FF in FIG. 9D.

[0017] 1, the head-up display 1 is disposed, for example, on a dashboard 5 (also referred to as an instrument panel) of a vehicle 2. A windshield 3 (also referred to as a front shield) is disposed above the dashboard 5 of the vehicle 2. The head-up display 1 is disposed within the dashboard 5.

[0018] The head-up display 1 is mounted on a vehicle 2 and projects an image onto an object that is capable of transmitting and reflecting light, thereby forming a virtual image on the opposite side of the object from the observer. For example, the head-up display 1 can display a virtual image represented by the image light to a user such as a driver by reflecting image light representing an image emitted from an image generation device 50 onto a windshield 3 that is an object. In other words, the head-up display 1 projects the image light emitted by the image generation device 50 forward onto the windshield 3, thereby displaying an image represented by the image light on the windshield 3. As a result, the image projected onto the windshield 3 of the vehicle 2 is visually recognized by the user.

[0019] Here, the image light is light that represents image information including numbers, letters, figures, etc., and is displayed as a virtual image in front of the windshield 3. The image may be a still image or a moving image, and may be an image of numbers, letters, figures, etc.

[0020] As shown in FIGS. 2 to 4, the head-up display 1 includes a first housing 10, an image generating device 50, a first reflecting mirror 31 and a second reflecting mirror 32, a second housing 20, and a cover 40.

[0021] The first housing 10 is a housing that houses the image generating device 50, the first reflecting mirror 31, and the second reflecting mirror 32. The first housing 10 forms an outer shell of the head-up display 1. The first housing 10 is fixed to the vehicle 2 in a state where it is attached to the dashboard 5. The first housing 10 is made of a resin material or a metal material.

[0022] A first opening 11 for disposing the second housing 20 is formed on the positive side of the first housing 10 in the Z-axis direction. The first opening 11 is provided so as to correspond in shape and position to a second opening 22 formed in the second housing 20.

[0023] The second housing 20 is attached to the first housing 10. Specifically, an engaging portion that is disposed on the edge portion of the second housing 20 on the negative Z-axis direction and extends in the negative Z-axis direction is engaged with an engaged portion that is disposed on the edge portion of the first housing 10 on the positive Z-axis direction and extends in the positive Z-axis direction. A spigot structure is formed in which the engaging portion of the second housing 20 is disposed outside the engaged portion of the first housing 10. This makes it difficult for liquid to enter the inside of the head-up display 1.

[0024] The image generation device 50 generates an image and outputs image light representing the generated image so that the image is projected onto the windshield 3. Specifically, the image generation device 50 emits the image light from a display unit. The image light emitted from the display unit of the image generation device 50 is reflected by the first reflecting mirror 31, then reflected by the second reflecting mirror 32, passes through the first opening 11, enters and transmits the cover 40, passes through the second opening 22, and is emitted from the head-up display 1 to be projected onto the windshield 3. In other words, by emitting the image light, the image generation device 50 can project a predetermined image onto the windshield 3. The image light is reflected by the windshield 3, allowing the user to recognize a virtual image. The image generation device 50 is, for example, a liquid crystal display device having a liquid crystal display or the like.

[0025] The image generating device 50 includes a display unit, a container, a light emitting module, and a condenser lens.

[0026] The display unit is a liquid crystal display element such as a liquid crystal display. In the display unit, the light emitting module is irradiated from the rear side, causing the light emitting surface to emit light. In the display unit, image light showing images including numbers, letters, figures, etc. is emitted from the light emitting surface in accordance with control instructions from an ECU (Electronic Control Unit) mounted on the vehicle 2. The display unit is driven by AC power obtained from a power supply unit in the vehicle 2.

[0027] The container is a container that houses the display unit, the light emitting module, and the condenser lens. The container is disposed on the bottom plate of the first housing 10.

[0028] The light-emitting module includes a light source and a substrate on which the light source is mounted. The light source is mounted on the substrate, which is held so as to irradiate light from the rear side of the display unit toward the display unit via a condenser lens. The light source is, for example, configured with a light-emitting diode. For example, the light source is driven by DC power obtained from a power supply unit in the vehicle 2.

[0029] The condenser lens is disposed on the light path between the light source and the display unit, in the direction of light emission from the light source, and directs the light emitted from the light source toward the display unit.

[0030] The first reflecting mirror 31 reflects the image light emitted by the image generating device 50 toward the second reflecting mirror 32. The second reflecting mirror 32 also reflects the image light emitted by the image generating device 50 toward the cover 40 via the first opening 11.

[0031] Specifically, the first reflecting mirror 31 and the second reflecting mirror 32 are arranged in the first housing 10 so as to face each other with a predetermined distance between them. More specifically, the first reflecting mirror 31 is arranged on the negative X-axis side of the first housing 10 so as to face the exit surface of the image generating device 50 and the second reflecting mirror 32, which are arranged on the positive X-axis side of the first housing 10. The first reflecting mirror 31 and the second reflecting mirror 32 are arranged between the image generating device 50 and the first opening 11. The second reflecting mirror 32 faces the first reflecting mirror 31 and is arranged on the positive X-axis side of the first reflecting mirror 31. In other words, the second reflecting mirror 32 is arranged to be aligned with the first reflecting mirror 31 along the X-axis direction.

[0032] The first reflecting mirror 31 and the second reflecting mirror 32 are concave mirrors, convex mirrors, or plane mirrors. In this embodiment, each of the first reflecting mirror 31 and the second reflecting mirror 32 is a concave mirror having a free-form surface. In this embodiment, each of the first reflecting mirror 31 and the second reflecting mirror 32 is a rectangular mirror that is elongated in the Y-axis direction. The shapes of the first reflecting mirror 31 and the second reflecting mirror 32 are not particularly limited, and may be polygonal or circular.

[0033] The second reflecting mirror 32 may also be able to swing about the Y-axis direction. In this case, it is possible to adjust the position of the image projected onto the windshield 3. The second reflecting mirror 32 may be able to swing by manual operation or by electrically operating a drive mechanism.

[0034] The second housing 20 is disposed closer to the windshield 3 than the first housing 10 and is connected to the first housing 10. The second housing 20 is made of a resin material. The structure having the first housing 10 and the second housing 20 is an example of a housing.

[0035] 3, the second housing 20 is a frame-like body having a flat rectangular shape and a rectangular second opening 22 formed in the center thereof, through which image light passes to the outside. The shapes of the second housing 20 and the second opening 22 are not limited to rectangular. The shapes of the second housing 20 and the second opening 22 may be set appropriately depending on the space for installing the head-up display 1 in the vehicle 2. Therefore, the shapes of the second housing 20 and the second opening 22 may be polygonal or circular other than rectangular, or may be other known shapes.

[0036] The second housing 20 supports a plate-shaped cover 40 that covers the second opening 22. The second housing 20 is formed with a mounting surface 120 on which the cover 40 is to be placed. The cover 40 is placed on and supported by the mounting surface 120, so that the cover 40 covers the second opening 22. As shown in FIG. 4 , the second opening 22 faces the first opening 11 of the first housing 10, and the second opening 22 and the first opening 11 are arranged side by side in the Z-axis direction.

[0037] 3 and 4, the second housing 20 has a wall portion 21 arranged around the second opening 22. Specifically, the second opening 22 is surrounded by a mounting surface 120, and the wall portion 21 is arranged around the mounting surface 120.

[0038] The placement surface 120 is curved so that its central portion in the X-axis direction is recessed. Specifically, the placement surface 120 has a pair of first placement surfaces 121 extending along the X-axis direction and a pair of second placement surfaces 122 extending along the Y-axis direction. The pair of first placement surfaces 121 are inclined upward toward the negative X-axis direction, and are curved so that the inclination of a tangent to the pair of first placement surfaces 121 with respect to the X-axis direction gradually increases. The Y-axis direction of the pair of second placement surfaces 122 is substantially parallel to the Y-axis direction, but may be curved so as to recess in the negative Z-axis direction. Note that in this embodiment, the pair of first placement surfaces 121 and the pair of second placement surfaces 122 may be collectively referred to as placement surfaces 120.

[0039] The wall portion 21 rises from the surface on the positive side of the Z axis of the second housing 20, i.e., from the edge of the mounting surface 120, and surrounds the second opening 22 and the mounting surface 120. Surrounding the second opening 22 and the mounting surface 120 may mean completely surrounding the second opening 22 and the mounting surface 120, or may mean that one or more drainage structures 26 are formed and cut out in the wall portion 21, thereby substantially surrounding the periphery.

[0040] The outer peripheral shape of wall portion 21 surrounding second opening 22 is asymmetric in the first and second directions (X-axis direction and Y-axis direction) and is similar to the shape of second opening 22. Wall portion 21 of the present embodiment does not completely surround the periphery of second opening 22 due to drainage structure 26 and the like, but the outer peripheral shape of wall portion 21 is a shape that is regarded as a shape that completely surrounds the periphery of second opening 22. The X-axis direction is an example of the first direction. The Y-axis direction is an example of the second direction.

[0041] The wall portion 21 has a pair of first extension portions 21a that face each other across the second opening 22 and extend along the X-axis direction, a pair of second extension portions 21b that extend along the Y-axis direction, which is different from the X-axis direction, and a plurality of claw portions 24 arranged along the wall portion 21.

[0042] The pair of first extending portions 21a extend along the X-axis direction. One of the pair of first extending portions 21a is disposed on the positive Y-axis direction side of the second opening 22. The other of the pair of first extending portions 21a is disposed on the negative Y-axis direction side of the second opening 22.

[0043] As described above, the first placement surface 121 is curved, and therefore, as shown in FIG. 4, the pair of first extending portions 21a are curved so as to approach the image generating device 50.

[0044] 3, the pair of second extending portions 21b extend along the Y-axis direction. One second extending portion 21b1 of the pair of second extending portions 21b is disposed on the front side (positive side of the X-axis) of the vehicle 2. The other second extending portion 21b2 of the pair of second extending portions 21b is disposed on the rear side (negative side of the X-axis) of the vehicle 2.

[0045] 5, one second extending portion 21b1 is longer than the other second extending portion 21b2. Note that one second extending portion 21b1 and the other second extending portion 21b2 may have the same length. Alternatively, the other second extending portion 21b2 may be longer than one second extending portion 21b1.

[0046] In this embodiment, the distance between two adjacent claw portions 24 provided on one second extending portion 21b1 is narrower than the distance between two adjacent claw portions 24 provided on the other second extending portion 21b2, and one second extending portion 21b1 is longer than the other second extending portion 21b2. Therefore, the number of claw portions 24 provided on one second extending portion 21b1 is smaller than the number of claw portions 24 provided on the other second extending portion 21b2.

[0047] Each of the plurality of claw portions 24 has a pressing portion that protrudes from the wall portion 21 toward the second opening 22. The plurality of claw portions 24 includes first claw portions 24a that are arranged along the pair of first extending portions 21a, and second claw portions 24b that are arranged along the pair of second extending portions 21b.

[0048] Specifically, the first claw portions 24a are arranged along the pair of first extending portions 21a. In this embodiment, two or more first claw portions 24a are arranged side by side along the pair of first extending portions 21a. The two or more first claw portions 24a are provided on a pair of first placing surfaces 121 formed along the pair of first extending portions 21a. In this embodiment, three first claw portions 24a are provided on each of the pair of first placing surfaces 121. The number of first claw portions 24a provided on each of the pair of first placing surfaces 121 may be two or less or four or more. The number of first claw portions 24a provided on one first placing surface 121 of the pair of first placing surfaces 121 and the number of first claw portions 24a provided on the other first placing surface 121 of the pair of first placing surfaces 121 may be the same as or different from each other.

[0049] 6 and 7, the first claw portion 24a has a base portion 225 that protrudes in the positive direction of the Z axis, and a first pressing portion 224a that protrudes in the negative direction of the X axis from the tip of the base portion 225. The first pressing portion 224a also extends along the Y axis direction so as to approach the second opening 22. In other words, the first pressing portion 224a extends from the base portion 225 in the Y axis direction and the negative X axis direction. The first pressing portion 224a is an example of a pressing portion.

[0050] The first pressing portion 224a faces the first placement surface 121 with the cover 40 interposed therebetween, and therefore can restrain the cover 40 from moving in the Z-axis direction.

[0051] The first pressing portion 224a is a protruding plate that extends from the pair of first extending portions 21a toward the second opening 22. An inclined portion 224b that slopes upward so as to move away from the first placing surface 121 is connected to the first pressing portion 224a. The inclined portion 224b is also connected to the base portion 225.

[0052] The inclined portion 224b is a plate portion that is inclined upward in the negative Y-axis direction. The inclined portion 224b extends in the negative X-axis direction from the base portion 225, and extends in the negative Y-axis direction from the first pressing portion 224a. The inclined portion 224b can guide the cover 40 to the first pressing portion 224a when attaching the cover 40 to the second housing 20.

[0053] 8, the second housing 20 is formed with a drainage structure 26. The drainage structure 26 is a drainage hole that penetrates in a direction perpendicular to the longitudinal direction of the pair of first extending portions 21a, or a recess that is recessed in a direction perpendicular to the longitudinal direction of the pair of first extending portions 21a. The drainage structure 26 extends vertically downward (in the negative Z-axis direction) below the surface of the cover 40. This allows water droplets to be drained from the drainage structure 26 even if they fall on the surface of the cover 40.

[0054] The drainage structures 26 are formed at positions corresponding to the plurality of first claw portions 24a arranged along each of the pair of first extending portions 21a. In other words, the drainage structures 26 are formed in the negative Z-axis direction of the plurality of first claw portions 24a.

[0055] As shown in FIGS. 5 and 9(a), the second claw portion 24b protrudes from the pair of second extending portions 21b along the X-axis direction so as to approach the second opening 22. The second claw portion 24b has a second pressing portion 224c extending from the pair of second extending portions 21b so as to approach the second opening 22, and an inclined portion 224d connected to the second pressing portion 224c and the pair of second extending portions 21b and inclined upward relative to the second pressing portion 224c so as to move away from the second placement surface 122. The second pressing portion 224c is an example of a pressing portion. In this embodiment, the first pressing portion 224a and the second pressing portion 224c may be collectively referred to as pressing portions.

[0056] The second pressing portion 224c arranged on one second extending portion 21b1 extends in the negative direction of the X axis from the surface of the one second extending portion 21b1 facing the second opening 22. The second pressing portion 224c arranged on the other second extending portion 21b2 extends in the positive direction of the X axis from the surface of the other second extending portion 21b2 facing the second opening 22. The second pressing portion 224c faces the second placement surface 122 with the cover 40 in between, and therefore can suppress movement of the cover 40 in the Z axis direction.

[0057] The second pressing portion 224c is a protruding plate that extends from the pair of second extending portions 21b toward the second opening 22. An inclined portion 224d that inclines upward so as to move away from the second placement surface 122 is connected to the second pressing portion 224c.

[0058] The inclined portion 224d of the second extending portion 21b is a plate portion that is inclined upward in the negative direction of the Y axis. The inclined portion 224d can guide the cover 40 when the cover 40 is attached to the second housing 20.

[0059] The second mounting surface 122 has protrusions 25 arranged along the pair of second extending portions 21b. The protrusions 25 engage with the cover 40 to suppress movement of the cover 40 in the X-axis direction and the Y-axis direction.

[0060] The protrusions 25 are located at both ends and the center of one second extending portion 21b1, and at least at the center of the other second extending portion 21b2. The protrusions 25 may also be located at both ends of the other second extending portion 21b2. The protrusions 25 located at the center of one second extending portion 21b1 and the protrusions 25 located at the center of the other second extending portion 21b2 do not overlap in the X-axis direction. In other words, the protrusions 25 located at the center of one second extending portion 21b1 and the protrusions 25 located at the center of the other second extending portion 21b2 are shifted in the Y-axis direction so as not to overlap in the X-axis direction.

[0061] A drainage structure 26 is formed on one of the second extension portions 21b1. The drainage structure 26 is a drainage hole that penetrates the one of the second extension portions 21b1 in a direction perpendicular to the longitudinal direction, or a notched recess that is cut out in the one of the second extension portions 21b1 in a direction perpendicular to the longitudinal direction. The drainage structure 26 extends vertically downward (in the negative Z-axis direction) below the surface of the cover 40. This allows water droplets that fall on the surface of the cover 40 to be drained from the drainage structure 26. Note that the other of the second extension portions 21b2 may also have a drainage structure 26 formed thereon.

[0062] The drainage structures 26 are formed at positions corresponding to the plurality of second claws 24b arranged along each of the pair of second extending portions 21b. In other words, the drainage structures 26 are formed in the negative Z-axis direction of the plurality of second claws 24b.

[0063] The cover 40 is made of a translucent resin material such as polycarbonate (PC) or acrylic, or a polarizing plate. The image light that has passed through the first opening 11 passes through the second opening 22, and therefore the image light that has passed through the cover 40 is projected onto the windshield 3.

[0064] The cover 40 also serves as an anti-fouling cover that prevents dust and dirt from entering the first housing 10. For example, the surface of the cover 40 facing the windshield 3 may be hard coated. In this case, even if dust and dirt adhere to this surface, the dirt can be easily wiped off. The surface of the cover 40 facing the windshield 3 is the surface of the cover 40 facing the positive direction of the X axis, and is the exit surface from which image light is emitted. In addition, the surface of the cover 40 may be anti-reflective coated.

[0065] The cover 40 is supported by the placement surface 120 of the second housing 20, the wall portion 21 of the second housing 20, the plurality of claw portions 24, and the plurality of protrusions 25.

[0066] Specifically, the cover 40 has a plurality of first engagement portions 41 formed corresponding to the plurality of claw portions 24, and a plurality of second engagement portions 42 formed corresponding to the plurality of protrusions 25. In this embodiment, the plurality of first engagement portions 41 are at least one of a plurality of through holes and a plurality of notches.

[0067] The multiple first engagement portions 41 are formed at positions corresponding to the multiple claw portions 24 when the cover 40 is placed on the mounting surface 120 of the second housing 20, and the multiple second engagement portions 42 are formed at positions corresponding to the multiple protrusions 25 when the cover 40 is placed on the mounting surface 120 of the housing. The second engagement portions 42 of the cover 40 are elongated holes that are long in the Y-axis direction and allow the cover 40 to slide.

[0068] As shown in Fig. 6, the first engagement portion 41 disposed on the negative side of the Y axis is configured with a first engagement hole 41a through which the claw portion 24 provided on the first mounting surface 121 is inserted when the cover 40 is attached to the second housing 20, and a second engagement hole 41b through which the base portion 225 can be inserted when the cover 40 is slid in the positive direction of the Y axis. The first engagement portion 41 disposed on the negative side of the Y axis forms an L shape with the first engagement hole 41a and the second engagement hole 41b. As shown in Fig. 7, when the base portion 225 is inserted into the second engagement hole 41b, the cover 40 is positioned so as to be sandwiched between the first pressing portion 224a and the first mounting surface 121.

[0069] The cover 40 has a shape corresponding to the outer peripheral shape of the wall portion 21. Therefore, the shape of the cover 40 is asymmetric in the X-axis direction and the Y-axis direction, and is similar to the shape of the second opening 22.

[0070] In the second housing 20, the cover 40 is surrounded by the pair of first extending portions 21a and the pair of second extending portions 21b due to the wall portion 21 and the second engaging portions 42 of the cover 40. Furthermore, the second housing 20 can sandwich the cover 40 between the pressing portions of the plurality of claws 24 inserted into the plurality of first engaging portions 41 and the mounting surface 120 due to the plurality of claws 24 and the plurality of first engaging portions 41. Furthermore, the plurality of protrusions 25 engage with the second engaging portions 42 when the cover 40 is held by the pressing portions, the pair of first extending portions 21a, and the pair of second extending portions 21b. In other words, the second housing 20 can engage with the cover 40 due to the plurality of protrusions 25 and the plurality of second engaging portions 42 of the cover 40. As a result, the second housing 20 can hold the cover 40 in a curved state. In other words, the second housing 20 can hold the cover 40 in a curved state along the mounting surface 120, which is curved so that its central portion in the X-axis direction is recessed.

[0071] Therefore, for example, even if the cover 40 is pressed down when wiping off dust adhering to the surface of the cover 40, the cover 40 is supported by the wall portion 21, the plurality of claw portions 24 and the plurality of protrusions 25, and therefore the cover 40 can be prevented from floating up.

[0072] In this head-up display 1, the image light emitted by the image generating device 50 is incident on the first reflecting mirror 31, reflected by the first reflecting mirror 31, then incident on the second reflecting mirror 32, reflected by the second reflecting mirror 32, passes through the first opening 11, and is incident on the cover 40 supported by the second opening 22 of the second housing 20. The image light incident on the cover 40 passes through the cover 40, and the image light is projected onto the windshield 3.

[0073] In this head-up display 1, a procedure for attaching the cover 40 to the second housing 20 will be described with reference to (a) to (f) of FIG.

[0074] 9(a) to 9(f) are schematic explanatory views showing how the cover 40 is attached to the second housing 20. FIG.

[0075] 9(a) to 9(c), the cover 40 is moved in the negative Z-axis direction and positioned so as to cover the second opening 22 of the second housing 20.

[0076] Specifically, the cover 40 is placed on the mounting surface 120 so as to cover the second opening 22 of the second housing 20, so that the multiple claw portions 24 of the second housing 20 correspond one-to-one to the multiple first engagement portions 41 of the cover 40, and so that the multiple protrusions 25 of the second housing 20 correspond one-to-one to the multiple second engagement portions 42 of the cover 40.

[0077] The cover 40 is engaged with the second housing 20 while being lowered in the negative direction of the Z axis so that the multiple claws 24 of the second housing 20 correspond one-to-one to the multiple first engagement portions 41 of the cover 40 and the multiple protrusions 25 of the second housing 20 correspond one-to-one to the multiple second engagement portions 42 of the cover 40. As a result, the multiple claws 24 of the second housing 20 engage one-to-one with the multiple first engagement portions 41 of the cover 40, and the multiple protrusions 25 of the second housing 20 engage one-to-one with the multiple second engagement portions 42 of the cover 40. As a result, the cover 40 is placed on the placement surface 120 of the second housing 20.

[0078] Next, the cover 40 is slid in the positive direction of the Y axis. As shown in (d) to (f) of Fig. 9, the sliding of the cover 40 moves the first engagement portions 41, and the cover 40 is disposed between the pressing portions of the claw portions 24 and the mounting surface 120. In this embodiment, by sliding the cover 40 in the positive direction of the Y axis, the cover 40 can be sandwiched between the pressing portions of the claw portions 24 inserted into the first engagement portions 41 and the mounting surface 120.

[0079] Therefore, the cover 40 is prevented from moving in the Z-axis direction by the pressing portions of the multiple claw portions 24, and the cover 40 is prevented from moving in the X-axis direction and the positive Y-axis direction by the multiple claw portions 24 and multiple protrusions 25, thereby preventing the second housing 20 from floating up relative to the mounting surface 120.

[0080] <Action and effect> Next, the effects of the head-up display 1 according to this embodiment will be described.

[0081] As described above, the head-up display 1 according to the first technique of the present embodiment is a head-up display 1 that is mounted on a vehicle 2, projects image light onto an object that is capable of transmitting and reflecting light, and forms a virtual image on the object on the opposite side to a viewer, and includes: an image generation device 50 for projecting the image light onto the object; a housing (second housing 20) that houses the image generation device 50, has an opening (second opening 22) that passes the image light to the outside, and has wall portions 21 that are arranged around the opening (second opening 22); and a plate-like cover 40 that is supported by a mounting surface 120 of the housing (second housing 20) and covers the opening (second opening 22), and the wall portions 21 face each other across the opening (second opening 22) and extend in a direction opposite to the first direction (X-axis direction). The cover 40 has a pair of first extending portions 21a extending along the wall portion 21, a pair of second extending portions 21b extending along a second direction (Y-axis direction) different from the first direction (X-axis direction), and a plurality of claw portions 24 arranged along the wall portion 21, the pair of first extending portions 21a being curved so as to approach the image generating device 50, the cover 40 having a plurality of first engaging portions 41 formed corresponding to the plurality of claw portions 24, the plurality of claw portions 24 having pressing portions protruding from the wall portion 21 so as to approach the opening (second opening 22), the housing (second housing 20) being surrounded by the pair of first extending portions 21a and the pair of second extending portions 21b, the cover 40 being sandwiched between the pressing portions engaged with the plurality of first engaging portions 41 and the mounting surface 120 to hold the cover 40 in a curved state.

[0082] With this, the cover 40 can be sandwiched between the plurality of claws 24 and the placement surface 120, so that even if the cover 40 supported on the placement surface 120 is pushed, the wall portion 21 and the plurality of claws 24 can support the cover 40. Therefore, the plurality of claws 24 can prevent the cover 40 from floating up.

[0083] Furthermore, since the cover 40 is sandwiched between the plurality of claws 24 and the placement surface 120, it is not necessary to connect the cover 40 to the second housing 20 using a separate double-sided tape or the like.

[0084] Therefore, according to the present disclosure, it is possible to suppress an increase in size and to suppress lifting of the cover 40. Furthermore, in the present disclosure, it is possible to hold the cover 40 to the second housing 20 without using double-sided tape or the like, and therefore it is possible to suppress an increase in material costs and manufacturing costs for the head-up display 1.

[0085] Furthermore, in the head-up display 1 relating to technology 2 of this embodiment, the plurality of claw portions 24 are provided on a pair of second extension portions 21b, and the pressing portion is a head-up display 1 described in technology 1 that protrudes along the first direction (X-axis direction) so as to approach the opening (second opening 22).

[0086] This makes it possible to prevent the cover 40, which is disposed along the pair of second extending portions 21b, from floating up. In particular, it is possible to prevent the cover 40 from floating up in the front-rear direction of the vehicle 2.

[0087] Furthermore, in the head-up display 1 relating to technology 3 of this embodiment, the multiple claw portions 24 are arranged along a pair of first extension portions 21a, and the pressing portion extends along the second direction (Y-axis direction) so as to approach the opening (second opening 22), which is the head-up display 1 described in technology 2.

[0088] This makes it possible to prevent the cover 40, which is disposed along the pair of first extending portions 21a, from floating up. In particular, it is possible to prevent the cover 40 from floating up in the left-right direction of the vehicle 2.

[0089] Furthermore, in the head-up display 1 relating to technology 4 of this embodiment, one second extension portion 21b1 of the pair of second extension portions 21b is arranged on the front side of the vehicle 2, and the other second extension portion 21b2 of the pair of second extension portions 21b is arranged on the rear side of the vehicle 2, and the number of claw portions 24 provided on one second extension portion 21b1 is less than the number of claw portions 24 provided on the other second extension portion 21b2, which is a head-up display 1 described in technology 3.

[0090] This can further prevent one of the second extending portions 21b1 from lifting up. For example, if one of the second extending portions 21b1 is longer than the other of the second extending portions 21b2, the number of claw portions 24 provided on one of the second extending portions 21b1 can be increased, thereby preventing one of the second extending portions 21b1 from lifting up.

[0091] In particular, when the surface of the cover 40 of the head-up display 1 is pressed from the seat side, it is considered that the pressure is often applied from the rear of the vehicle 2 toward the front of the vehicle 2. In this case, pressing from the rear of the vehicle 2 toward the front of the vehicle 2 may cause the front side of the cover 40 to lift up from the first placement surface 121. However, according to the present embodiment, the lifting of one of the second extension portions 21b1 can be further suppressed, and therefore, it is possible to suppress the intrusion of dust through the gap between the second housing 20 and the cover 40.

[0092] Furthermore, in the head-up display 1 relating to technology 5 of this embodiment, the cover 40 has a second engagement portion 42, and the mounting surface 120 (second mounting surface 122) has a protrusion 25 arranged along each of the pair of second extension portions 21b, and the protrusion 25 engages with the second engagement portion 42 when the cover 40 is held by the pressing portion, the pair of first extension portions 21a, and the pair of second extension portions 21b, which is a head-up display 1 described in any one of technologies 1 to 4.

[0093] According to this, when attaching the cover 40 to the second housing 20, the claws 24 correspond to the first engagement portions 41 of the cover 40, and the protrusions 25 of the second housing 20 correspond to the second engagement portions 42 of the cover 40, so that the cover 40 can slide in a predetermined direction without rattle. In other words, the claws 24 engage with the first engagement portions 41, and the protrusions 25 engage with the second engagement portions 42, so that the cover 40 can be positioned and movement of the cover 40 in the X-axis direction can be suppressed. As a result, the cover 40 can be easily attached to the second housing 20.

[0094] Furthermore, in the head-up display 1 relating to technology 6 of this embodiment, one second extension portion 21b1 of the pair of second extension portions 21b is arranged on the front side of the vehicle 2, the other second extension portion 21b2 of the pair of second extension portions 21b is arranged on the rear side of the vehicle 2, and the protrusions 25 are located on both end sides and the center side of one second extension portion 21b1, and are located at least on the center side of the other second extension portion 21b2, which is the head-up display 1 described in technology 5.

[0095] This can further prevent one of the second extending portions 21b1 from lifting up. For example, if one of the second extending portions 21b1 is longer than the other of the second extending portions 21b2, the number of claw portions 24 provided on one of the second extending portions 21b1 can be increased, thereby preventing one of the second extending portions 21b1 from lifting up.

[0096] Moreover, the head-up display 1 according to the seventh technique of the present embodiment is the head-up display 1 according to the sixth technique, in which the protrusions 25 are located on both end sides of the other second extending portion 21b2.

[0097] This can further prevent the second extending portion 21b1 from floating up.

[0098] Furthermore, in the head-up display 1 relating to technology 8 of this embodiment, the outer peripheral shape of the wall portion 21 surrounding the opening (second opening 22) is asymmetric in the X-axis direction and the Y-axis direction, and is similar to the shape of the opening (second opening 22), and the protrusion 25 located on the central side of one second extension portion 21b1 and the protrusion 25 located on the central side of the other second extension portion 21b2 do not overlap in the X-axis direction, which is a head-up display 1 described in technology 6 or 7.

[0099] According to this, the protrusions 25 can be disposed on the central side of one second extension portion 21b1 and the central side of the other second extension portion 21b2 in accordance with the outer peripheral shape of the asymmetric wall portion 21, so that the wall portion 21, the plurality of claw portions 24, and the plurality of protrusions 25 can support the cover 40 even if they do not overlap in the X-axis direction. This makes it possible to prevent the cover 40 from floating up.

[0100] Furthermore, in the head-up display 1 relating to technology 9 of this embodiment, one second extension portion 21b1 of the pair of second extension portions 21b is arranged on the front side of the vehicle 2, and the other second extension portion 21b2 of the pair of second extension portions 21b is arranged on the rear side of the vehicle 2, and one second extension portion 21b1 is longer than the other second extension portion 21b2, which is a head-up display 1 described in any one of technologies 1 to 8.

[0101] This allows the shape of the head-up display 1 to be set in accordance with the size and shape of the space of the vehicle 2 in which the head-up display 1 is arranged.

[0102] Furthermore, in the head-up display 1 relating to technology 10 of this embodiment, a drainage structure 26 is formed on the pair of first extension portions 21a, and the drainage structure 26 extends vertically downward below the surface of the cover 40, which is a head-up display 1 described in any one of technologies 1 to 9.

[0103] With this, even if liquid adheres to the surface of the cover 40, the liquid on the surface of the cover 40 can be drained through the drainage structure 26. Therefore, the image light incident on the cover 40 can be appropriately projected onto the windshield 3 without the liquid entering the inside of the head-up display 1.

[0104] Furthermore, the drainage structures 26 formed on the pair of first extension portions 21a are larger than the drainage structures 26 formed on the pair of second extension portions 21b. This not only drains liquid adhering to the surface of the cover 40, but also makes it easier for an operator's fingers to enter, facilitating assembly, installation, and sliding operations. Of the three sets of drainage structures 26 formed on the pair of first extension portions 21a, all of the three sets of drainage structures 26 may be larger than the drainage structures 26 formed on the pair of second extension portions 21b, or one or two of the three sets of drainage structures 26 may be larger than the drainage structures 26 formed on the pair of second extension portions 21b.

[0105] Furthermore, in the head-up display 1 relating to technology 11 of this embodiment, one second extension portion 21b1 of the pair of second extension portions 21b is arranged on the front side of the vehicle 2, and a drainage structure 26 is formed on the one second extension portion 21b1, and the drainage structure 26 extends vertically downward below the surface of the cover 40, which is a head-up display 1 described in any one of technologies 1 to 10.

[0106] With this, even if liquid adheres to the surface of the cover 40, the liquid flows vertically downward to one of the second extending portions 21b1, and the liquid on the surface of the cover 40 can be discharged from the drainage structure 26 of one of the second extending portions 21b1. Therefore, the image light incident on the cover 40 can be appropriately projected onto the windshield 3 without the liquid entering the inside of the head-up display 1.

[0107] Furthermore, in the head-up display 1 relating to technology 12 of this embodiment, the pressing portion (first pressing portion 224a) extends from a pair of first extension portions 21a so as to approach the opening (second opening 22), and the pressing portion (first pressing portion 224a) is connected to inclined portions 224b, 224d that slope upward so as to move away from the placing surface 120, which is a head-up display 1 described in any one of technologies 1 to 11.

[0108] According to this, when attaching the cover 40 to the second housing 20, when the cover 40 is placed on the placement surface 120 and slid in the Y-axis direction, the inclined portions 224b and 224d can guide the cover 40. Therefore, the cover 40 can be sandwiched between the plurality of claws 24 and the placement surface 120.

[0109] Furthermore, in the head-up display 1 relating to technology 13 of this embodiment, the pressing portion (second pressing portion 224c) extends from the pair of second extension portions 21b toward the opening (second opening 22), and the pressing portion (second pressing portion 224c) is connected to inclined portions 224b, 224d that slope upward away from the placing surface 120, which is a head-up display 1 described in any one of technologies 1 to 12.

[0110] According to this, when attaching the cover 40 to the second housing 20, when the cover 40 is placed on the placement surface 120 and slid in the Y-axis direction, the inclined portions 224b and 224d can guide the cover 40. Therefore, the cover 40 can be sandwiched between the plurality of claws 24 and the placement surface 120.

[0111] (Other variations, etc.) While the head-up display according to the present disclosure has been described based on the above-described embodiments, the present disclosure is not limited to these embodiments. As long as the modifications do not deviate from the spirit of the present disclosure, various modifications conceivable by those skilled in the art may also be included in the scope of the present disclosure.

[0112] In addition, this disclosure also includes forms obtained by making various modifications to the above embodiments that a person skilled in the art would think of, and forms realized by arbitrarily combining the components and functions of the embodiments within the scope that does not deviate from the intent of this disclosure. [Industrial Applicability]

[0113] The present disclosure can be used in mobile objects such as vehicles. [Explanation of symbols]

[0114] 1 Head-up display 2 vehicles 3 Windshield (object) 5. Dashboard 10 First enclosure (enclosure) 20 Second cabinet (cabinet) 21 Wall 21a First Enbe 21b Second extension section 22 Second opening (opening) 24 Claw 25 Protrusion 26 Drainage structure 40 Cover 41 First engaging part 42 Second engaging part 50 Image generation device 120 Placement surface 121 First mounting surface 122 Second mounting surface 224a First presser part (presser part) 224b, 224d Slope section 224c Second presser foot (presser foot)

Claims

1. A head-up display that is mounted on a vehicle and projects image light onto an object that is capable of transmitting and reflecting light, and forms a virtual image on the object on the opposite side of a viewer, an image generating device for projecting image light onto the object; a housing that houses the image generating device, that has an opening formed therein through which the image light passes to the outside, and that has a wall portion that is arranged around the opening; a plate-shaped cover that is supported on the mounting surface of the housing and covers the opening, The wall portion has a pair of first extending portions that face each other across the opening and extend along a first direction, a pair of second extending portions that extend along a second direction that is different from the first direction, and a plurality of claw portions that are arranged along the wall portion, The pair of first extending portions are curved to approach the image generating device, the cover has a plurality of first engagement portions formed corresponding to the plurality of claw portions, The plurality of claw portions have pressing portions that protrude from the wall portion toward the opening, The housing is surrounded by a pair of the first extending portions and a pair of the second extending portions, and the cover is sandwiched between the pressing portion engaged with the plurality of first engaging portions and the placement surface, thereby holding the cover in a curved state. Head-up display.

2. The plurality of claw portions are provided on the pair of second extension portions, The pressing portion protrudes along the first direction so as to approach the opening. The head-up display according to claim 1 .

3. The plurality of claw portions are arranged along the pair of first extension portions, The pressing portion extends along the second direction so as to approach the opening. The head-up display according to claim 2 .

4. one of the pair of second extension portions is disposed on a front side of the vehicle, the other of the pair of second extension portions is disposed on the rear side of the vehicle, The number of the claw portions provided on one of the second extending portions is smaller than the number of the claw portions provided on the other of the second extending portions. The head-up display according to claim 3 .

5. the cover has a second engagement portion, the mounting surface has protrusions arranged along the pair of second extending portions, The protrusion engages with the second engaging portion in a state in which the cover is held by the pressing portion, the pair of first extending portions, and the pair of second extending portions. The head-up display according to any one of claims 1 to 4.

6. one of the pair of second extension portions is disposed on a front side of the vehicle, the other of the pair of second extension portions is disposed on the rear side of the vehicle, The protrusion is Located at both end sides and the center side of one of the second extension portions, The other second extending portion is located at least on the central side. The head-up display according to claim 5 .

7. The protrusions are located on both end sides of the other second extending portion. The head-up display according to claim 6.

8. The outer peripheral shape of the wall portion surrounding the opening is asymmetric in the first direction and the second direction; The shape of the opening is similar to that of the opening, The protrusion located on the center side of one of the second extension portions and the protrusion located on the center side of the other of the second extension portions do not overlap on the first side. The head-up display according to claim 6.

9. one of the pair of second extension portions is disposed on a front side of the vehicle, the other of the pair of second extension portions is disposed on the rear side of the vehicle, One of the second extending portions is longer than the other of the second extending portions. The head-up display according to any one of claims 1 to 4.

10. A drainage structure is formed in the pair of first extension portions, The drainage structure extends vertically below the surface of the cover. The head-up display according to any one of claims 1 to 4.

11. one of the pair of second extension portions is disposed on a front side of the vehicle, A drainage structure is formed in one of the second extension portions, The drainage structure extends vertically below the surface of the cover. The head-up display according to any one of claims 1 to 4.

12. The pressing portion extends from the pair of first extending portions so as to approach the opening, The pressing portion is connected to an inclined portion that is inclined upward so as to move away from the placing surface. The head-up display according to any one of claims 1 to 4.

13. The pressing portion extends from the pair of second extending portions so as to approach the opening, The pressing portion is connected to an inclined portion that is inclined upward so as to move away from the placing surface. The head-up display according to any one of claims 1 to 4.

Images