Head-up display

Abstract

We provide a head-up display with excellent assembly capabilities. [Solution] The head-up display 1 comprises a reflective mirror 30 having a fixing portion 33 and a housing 10 that houses the reflective mirror 30. The housing 10 has an insertion portion 100 into which the fixing portion 33 is inserted to support the reflective mirror 30. The insertion portion 100 has an opening 101 into which the fixing portion 33 is inserted, a bottom portion 102 that supports one end edge of the inserted fixing portion 33, a first surface 111 that faces the back surface 31b of the reflective mirror 30 and extends along a first straight line V1, and a second surface 122 that faces the front surface 31a of the reflective mirror 30. The insertion portion 100 has an engaging portion 113 that fixes the other end edge of the fixing portion 33 and is connected to the first surface 111. When the fixing portion 33 is not inserted into the insertion portion 100, the distance between the first straight line V1 and the second surface 122 narrows in the direction of insertion of the fixing portion 33 into the insertion portion 100.

Description

[Technical Field]

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

[0002] Patent Document 1 discloses a display system that is mounted on a vehicle and capable of projecting an image. This display system includes a display, a mirror having a mirror surface that reflects light emitted from the display, and a housing that accommodates the mirror. The mirror has three mounting portions positioned spaced apart from each other, and the three mounting portions are sandwiched between a first member of the housing and a second member of the housing. Accordingly, in the display system, the mirror can be fixed using the housing. [Prior Art Literature] [Patent Literature]

[0003] [Patent Document 1] Japanese Patent No. 7149593 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] However, in conventional display systems, there is a problem in that assembling the mirror to the housing requires a certain knack and experience, making assembly difficult.

[0005] Accordingly, an object of the present disclosure is to provide a head-up display with excellent assemblability. [Means for Solving the Problem]

[0006] A head-up display according to one aspect of the present disclosure comprises an image generating device, a mirror having a fixed portion, and a housing that houses the image generating device and the mirror, wherein the housing has an insertion portion that supports the mirror when the fixed portion is inserted into it, the insertion portion having an opening into which the fixed portion is inserted, a bottom portion that supports one end edge of the inserted fixed portion, a first surface that faces the back surface of the mirror and extends along a first straight line, and a second surface that faces the front surface of the mirror, the insertion portion having an engagement portion that fixes the other end edge of the fixed portion and is connected to the first surface, and when the fixed portion is not inserted into the insertion portion, the distance between the first straight line and the second surface narrows in the direction in which the fixed portion is inserted into the insertion portion. [Effects of the Invention]

[0007] The head-up display disclosed herein offers excellent assembly capabilities. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a perspective view showing a head-up display according to an embodiment mounted in a vehicle. [Figure 2] Figure 2 is a cross-sectional view showing the windshield and head-up display. [Figure 3] Figure 3 is a perspective view looking down at the housing and reflective mirror of a head-up display according to an embodiment mounted on a vehicle. [Figure 4] Figure 4 is a cross-sectional view showing the head-up display along line AA in Figure 3. [Figure 5] Figure 5 is a cross-sectional view showing the head-up display along line BB in Figure 3. [Figure 6] Figure 6 is a schematic diagram illustrating the relationship between the first line and the third plane. [Figure 7] Figure 7 is a schematic diagram showing the relationship between the guide section and the fixing section of the reflective mirror. [Figure 8] Figure 8 is a perspective view showing the relationship between the guide and the insertion part. [Figure 9] Figure 9 is a perspective view showing the relationship between the fixing part of the reflective mirror and the guide and insertion part. [Figure 10] Figure 10 is a side view showing the side of the reflective mirror. [Figure 11] Figure 11 is an explanatory diagram showing the holes in the bottom and the second projection. [Figure 12] Figure 12 is an explanatory diagram showing the relationship between the relative position relative to the vehicle and the central axis of the hole. [Modes for carrying out the invention]

[0009] The embodiments will be described in detail below with reference to the drawings.

[0010] The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, components, arrangement positions of components, and connection configurations shown in the following embodiments are examples only and are not intended to limit this disclosure. Furthermore, any components in the following embodiments that are not described in an independent claim will be described as optional components.

[0011] Furthermore, each figure is a schematic diagram and not necessarily a strictly accurate representation. Therefore, for example, the scale may not necessarily match in each figure. Also, in each figure, substantially identical components are given the same reference numerals, and redundant explanations are omitted or simplified.

[0012] Furthermore, in the following embodiments, in Figure 2, the direction normal to the surface of the reflective mirror on 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 Figure 2 are also applied in Figures 3 and onward.

[0013] Also, in the following embodiments, expressions such as the X-axis direction, rectangular shape, substantially parallel, etc., are used. For example, the X-axis direction not only means being perfectly along the X-axis direction, a rectangular shape not only means being perfectly rectangular, and substantially parallel not only means being perfectly parallel, but also means being substantially along the X-axis direction, substantially rectangular, and substantially parallel, that is, including an error of, for example, about several percent. Also, the X-axis direction, rectangular shape, and substantially parallel mean that they are the X-axis direction, rectangular shape, and substantially parallel within the range where the effects of the present disclosure can be achieved. The same applies to other expressions using "direction", "shape", and "substantially".

[0014] (Embodiment) <Configuration> Hereinafter, the head-up display 1 of the present disclosure will be specifically described with reference to FIG. 1 and FIG. 2.

[0015] FIG. 1 is a perspective view showing the head-up display 1 according to the embodiment mounted on a vehicle 2. FIG. 2 is a cross-sectional view showing a windshield 3 and the head-up display 1.

[0016] First, the schematic configuration of the head-up display 1 will be described.

[0017] As shown in FIG. 1 and FIG. 2, 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 inside the dashboard 5.

[0018] The head-up display 1 is mounted on the vehicle 2, projects an image onto an object capable of transmitting and reflecting light, and forms a virtual image on the opposite side of the object from an observer.

[0019] For example, the head-up display 1 can display a virtual image represented by image light to a user, such as a driver, by reflecting the image light representing the image emitted from the image generation device 50 onto a display medium such as the windshield 3 or a translucent combiner. In other words, the head-up display 1 projects the image light emitted from the image generation device 50 onto the windshield 3 or display medium, thereby displaying the image indicated by the image light on the windshield 3 or display medium. As a result, the image projected onto the windshield 3 of the vehicle 2 is visible to the user. Figures 1 and onward of this embodiment illustrate the case in which the head-up display 1 projects image light onto the windshield 3.

[0020] Here, the image light is light that represents image information, including numbers, letters, and figures, and is displayed as a virtual image in front of the windshield 3. The image can be a still image or a moving image, and is an image of numbers, letters, and figures.

[0021] As shown in Figure 2, the head-up display 1 comprises a housing 10, an image generation device 50, and one or more reflective mirrors 30.

[0022] The housing 10 is a housing that accommodates the image generation device 50 and one or more reflective mirrors 30. The housing 10 is made of resin material or the like and constitutes the outer shell of the head-up display 1. The housing 10 is fixed to the vehicle 2 while attached to the dashboard 5. A housing opening is formed on the Z-axis positive side of the housing 10 to allow image light to pass through and be emitted to the outside. A dust cover 40 is placed in the housing opening.

[0023] The reflective mirror 30 is attached to the housing 10 and can reflect the image light emitted by the image generation device 50. Figure 2 illustrates a case in which multiple reflective mirrors 30 are mounted on the head-up display 1.

[0024] The multiple reflective mirrors 30 include a first reflective mirror 30a and a second reflective mirror 30b.

[0025] The first reflective mirror 30a and the second reflective mirror 30b are arranged in the housing 10 so as to face each other at a predetermined distance apart. The first reflective mirror 30a is positioned on the rear side of the housing 10 of the vehicle 2 so as to face the emission surface of the image generation device 50, which is located on the front side of the housing 10 of the vehicle 2, and the second reflective mirror 30b. The second reflective mirror 30b is positioned parallel to the first reflective mirror 30a along the front-rear direction of the vehicle 2. The first reflective mirror 30a reflects the image light emitted by the image generation device 50 toward the second reflective mirror 30b. The second reflective mirror 30b reflects the image light reflected by the first reflective mirror 30a toward the dustproof cover 40 through the housing opening.

[0026] The first reflective mirror 30a and the second reflective mirror 30b are described in reference to the drawings, and the number of reflective mirrors 30 may be one or three or more, and is not limited to this embodiment.

[0027] The reflective mirror 30 is a concave mirror, a convex mirror, or a plane mirror. In this embodiment, the first reflective mirror 30a is a plane mirror. The second reflective mirror 30b is a concave mirror having a free-form surface. In this embodiment, each of the reflective mirrors 30 is a plate-shaped mirror with a rectangular shape that is elongated in the Y-axis direction. The shape of the reflective mirror 30 is not particularly limited and may be polygonal or circular.

[0028] The image generation device 50 generates an image and outputs image light indicating the generated image so that the image is projected onto the windshield 3. Specifically, the image generation device 50 emits image light from its display unit. The image light emitted from the display unit of the image generation device 50 is reflected by one or more reflective mirrors 30 and passes through the dustproof cover 40 of the housing opening, and is emitted to the outside of the head-up display 1. In other words, the image generation device 50 can project a predetermined image onto the windshield 3 or display medium by emitting image light. The user can perceive a virtual image when the image light is reflected by the windshield 3 or display medium. The image generation device 50 is, for example, a liquid crystal display device having a liquid crystal display or the like.

[0029] Such an image generation device 50 is attached to the bottom surface of the housing 10. The image generation device 50 is composed of, for example, a liquid crystal display element such as a liquid crystal display, a focusing lens, a light-emitting module such as an LED, and a container that houses these.

[0030] Next, with reference to Figures 3 to 12, the details of the reflective mirror 30 and housing 10 in the head-up display 1 will be described.

[0031] Figure 3 is a perspective view looking down at the housing 10 and reflective mirror 30 of the head-up display 1 according to an embodiment mounted on a vehicle 2. Figure 4 is a cross-sectional view showing the head-up display 1 along line AA in Figure 3. Figure 5 is a cross-sectional view showing the head-up display 1 along line BB in Figure 3. Figure 6 is a schematic explanatory diagram showing the relationship between the first straight line V1 and the third surface 122a. Figure 7 is a schematic diagram showing the relationship between the guide portion 116 and the fixing portion 33 of the reflective mirror 30. Figure 8 is a perspective view showing the relationship between the guide 37 and the insertion portion 100. Figure 9 is a perspective view showing the relationship between the fixing portion 33 of the reflective mirror 30 and the guide 37 and the insertion portion 100. Figure 10 is a side view showing the side of the reflective mirror 30. Figure 11 is an explanatory diagram showing the bottom portion 102 and the hole 110b1 of the second projection 110b. Figure 12 is an explanatory diagram showing the relationship between the relative position relative to the vehicle and the central axis (straight line W2) of the hole 110b1.

[0032] As shown in Figures 3 and 4, the reflective mirror 30 has a mirror body 32 on one side facing the positive X-axis direction and a fixing part 33 provided on the mirror body 32. In this embodiment, the reflective mirror 30 is a rectangular plate, and the mirror body 32 is also a rectangular plate.

[0033] Fixing parts 33 for attachment to the housing 10 are provided at the edges of the mirror body 32. In this embodiment, a pair of fixing parts 33 are provided at both ends of the mirror body 32 in the Y-axis direction. Each of the pair of fixing parts 33 is attached to the housing 10. By attaching the pair of fixing parts 33 to the housing 10, the reflective mirror 30 is supported by the housing 10 in a predetermined position.

[0034] As shown in Figures 4 and 5, the fixing portion 33 has a notch 35 cut out from the edge of the reflective mirror 30 toward the mirror body 32. Specifically, the fixing portion 33 on the positive Y-axis side of the pair of fixing portions 33 has a notch 35 cut out from the edge of the fixing portion 33 on the positive Y-axis side toward the mirror body 32. In addition, the fixing portion 33 on the negative Y-axis side of the pair of fixing portions 33 has a notch 35 cut out from the edge of the fixing portion 33 on the negative Y-axis side toward the mirror body 32.

[0035] The notch 35 is formed to engage with the engaging portion 113 of the insertion portion 100 when the reflective mirror 30 is attached to the insertion portion 100 of the housing 10. The notch 35 is located on the Z-axis positive side of the fixing portion 33 when the reflective mirror 30 is attached to the insertion portion 100 of the housing 10.

[0036] In this embodiment, the reflective mirror 30 is supported by the housing 10 in a position that is inclined downward toward the rear of the vehicle 2 with respect to the front-rear direction of the vehicle 2.

[0037] The housing 10 has an inner cover 12 and an outer shell 11.

[0038] The inner cover 12 is housed in the outer shell 11 and is positioned to divide the internal space of the outer shell 11 into a space on the vertically upward side and a space on the vertically downward side. The inner cover 12 can suppress stray light from the image light emitted by the image generation device 50, external light incident from outside the head-up display 1, etc.

[0039] The outer shell 11 is a housing that contains the inner cover 12, the image generation device 50, and one or more reflective mirrors 30. The outer shell 11 forms the outer shell of the head-up display 1. The outer shell 11 may be an example of the housing 10.

[0040] Inside the outer shell 11, an insertion portion 100 is formed that can support the reflective mirror 30 by receiving a fixing portion 33 inserted along the insertion direction. In this embodiment, since the reflective mirror 30 has a pair of fixing portions 33, the outer shell 11 has a pair of insertion portions 100 that correspond one-to-one with the pair of fixing portions 33. The insertion direction is the direction in which the reflective mirror 30 is inserted into the insertion portion 100 of the housing 10 when attaching the reflective mirror 30 to the housing 10.

[0041] As shown in Figures 4 and 6, the insertion portion 100 is a rib of the outer shell portion 11 formed to support the reflective mirror 30 in a position substantially parallel to the first straight line V1. The insertion portion 100 supports the fixing portion 33 of the reflective mirror 30 so that image light from the image generation device 50 is incident on the mirror surface of the reflective mirror 30. The first straight line V1 is a reference line for supporting the reflective mirror 30 in a desired position. In this embodiment, the first straight line V1 is a straight line substantially parallel to the Z-axis direction. The insertion portion 100 extends along the first straight line V1 to receive the fixing portion 33 as it slides in the insertion direction. The length of the insertion portion 100 is equivalent to the amount of slide (movement) of the fixing portion 33 from the time it starts to insert into the insertion portion 100 until it stops.

[0042] The inner cover 12 has cover insertion holes 12a formed at positions corresponding to the insertion portions 100 of the outer shell 11 so as not to interfere with the reflective mirror 30. In this embodiment, since a pair of insertion portions 100 are formed in the outer shell 11, the inner cover 12 also has a pair of cover insertion holes 12a formed so as to correspond one-to-one with the pair of insertion portions 100. Therefore, when attaching the reflective mirror 30 to the housing 10, it is inserted into the cover insertion holes 12a of the inner cover 12 while simultaneously inserting it into the insertion portions 100 of the outer shell 11.

[0043] The insertion portion 100 has an opening 101, a bottom portion 102, a first rib 110, and a second rib 120.

[0044] The opening 101 extends along the first straight line V1. The fixing part 33, which slides in the insertion direction, is inserted into the opening 101. The opening 101 consists of a first opening, which is the entrance to the insertion part 100 into which the fixing part 33 is inserted, and a second opening that extends from the first opening along the insertion direction to the bottom part 102.

[0045] The bottom portion 102 is positioned at the end of the insertion portion 100 on the Z-axis negative side. The bottom portion 102 is configured to support one end edge (the Z-axis negative side edge) of the fixing portion 33 by contacting the Z-axis negative side end face of the fixing portion 33 inserted into the insertion portion 100.

[0046] The first rib 110 has a first surface 111 that faces the fixing part 33 when the fixing part 33 is inserted into the insertion part 100. The first surface 111 faces the back surface 31b of the reflective mirror 30 and extends along the first straight line V1. The back surface 31b of the reflective mirror 30 is the surface on the negative X-axis side of the reflective mirror 30. The first surface 111 is approximately parallel to the first straight line V1.

[0047] The second rib 120 is positioned on the X-axis positive side than the first rib 110. The second rib 120 has a second surface 122 that faces the fixing part 33 when the fixing part 33 is inserted into the insertion part 100. The second surface 122 faces the surface 31a of the reflective mirror 30. The surface 31a of the reflective mirror 30 is the mirror surface on the X-axis positive side of the reflective mirror 30.

[0048] The second surface 122 has a third surface 122a and a fourth surface 122b. The third surface 122a is located on the entrance side of the insertion portion 100 (the side of the engagement portion 113, which will be described later) and extends along the second straight line V2. The fourth surface 122b is located closer to the bottom portion 102 than the third surface 122a. In this embodiment, the second straight line V2 is non-parallel to the first straight line V1.

[0049] When the fixing part 33 is not inserted into the insertion part 100, the distance between the first straight line V1 and the second surface 122 narrows in the direction of insertion of the fixing part 33 into the insertion part 100. Specifically, when the fixing part 33 is not inserted into the insertion part 100, the distance between the first straight line V1 and the second straight line V2 (third surface 122a) narrows in the direction of insertion of the fixing part 33 into the insertion part 100. In other words, the distance between the first straight line V1 and the second straight line V2 is larger towards the entrance side (first opening side) of the insertion part 100, so the shape of the insertion part 100 makes it easier to insert the fixing part 33.

[0050] As shown in Figures 4 and 5, the insertion portion 100 further has an engaging portion 113.

[0051] The engaging portion 113 is connected to the first surface 111 of the first rib 110 and can fix the fixing portion 33 by engaging with the other end edge (the end edge on the Z-axis positive direction) of the fixing portion 33. The engaging portion 113 is a long hooking portion that extends from the first surface 111 along the first straight line V1. When the fixing portion 33 is inserted into the insertion portion 100, the insertion portion 100 can be fixed so that the fixing portion 33 does not come out because the engaging portion 113 catches and engages with the fixing portion 33.

[0052] The engaging portion 113 has a connecting portion 114 and a claw portion 115.

[0053] The connecting portion 114 is a long, rod-shaped body extending from the first surface 111 along the positive Z-axis direction. The surface of the connecting portion 114 on the fixing portion 33 side and the first surface 111 are flush and coplanar. The connecting portion 114 is elastically deformable along the XZ plane, with the connection point with the first surface 111 as a fulcrum.

[0054] The claw portion 115 is positioned at the tip of the connecting portion 114 on the Z-axis positive side. When the fixing portion 33 is inserted into the insertion portion 100, the claw portion 115 is perpendicular to the direction in which the connecting portion 114 extends and extends toward the notch portion 35 of the fixing portion 33 so as to be inserted into the notch portion 35. Therefore, the claw portion 115 can engage (catch) with the notch portion 35, thereby preventing the fixing portion 33 from coming out in the opposite direction to the insertion direction.

[0055] In the cross-sectional view shown in Figure 5, the distance between the claw portion 115 and the third surface 122a when the claw portion 115 and the third surface 122a are projected onto the XZ plane may be set to be equal to the thickness of the fixing portion 33. In this case, when the fixing portion 33 is inserted from the entrance of the insertion portion 100, the fixing portion 33 may slide along the third surface 122a due to the weight of the reflective mirror 30 and be inserted until it reaches the pair of third protrusions 110c.

[0056] The engaging portion 113 may further have a guide portion 116 that extends from the claw portion 115 in a direction intersecting the first straight line V1 so as to move away from the fixing portion 33 (to be located outside the opening 101) when the fixing portion 33 is inserted into the insertion portion 100.

[0057] In this case, as shown in Figure 7, when the fixing part 33 is inserted into the insertion part 100, the distance D between the end of the guide part 116 and the fixing part 33 may be 0.8 mm or more. In this case, a space can be formed between the end of the guide part 116 and the fixing part 33 in which a person can insert their fingernail, so that it can be elastically deformed by a finger along the XZ plane with the Y axis as the axis.

[0058] Furthermore, when the fixing part 33 is inserted into the insertion part 100, the angle θ1 between the guide part 116 and the fixing part 33 may be 20° to 45°. In this case, a gap can be formed between the end of the guide part 116 and the fixing part 33, allowing a person to elastically deform it in the negative X-axis direction with their finger.

[0059] As shown in Figures 4 and 5, the insertion portion 100 may further have a pair of first protrusions 110a that are positioned on the bottom portion 102 side and protrude toward each other.

[0060] One of the pair of first projections 110a is formed on the first surface 111 and may protrude toward the fixing portion 33 when the fixing portion 33 is inserted into the insertion portion 100.

[0061] The other of the pair of first projections 110a is formed on the second surface 122 and may protrude toward the fixing portion 33 when the fixing portion 33 is inserted into the insertion portion 100.

[0062] In the cross-sectional view shown in Figure 4, when the fixing portion 33 is inserted into the insertion portion 100, the pair of first projections 110a may support the reflective mirror 30 by sandwiching the fixing portion 33 from the front surface 31a side and the back surface 31b side of the reflective mirror 30. The pair of first projections 110a may face each other or be spaced apart without facing each other.

[0063] The insertion portion 100 may also have a pair of third protrusions 110c formed between the pair of first protrusions 110a and the opening 101, which protrude toward each other.

[0064] One of the pair of third projections 110c is formed on the first surface 111. When the fixing portion 33 is inserted into the insertion portion 100, one of the third projections 110c protrudes toward the fixing portion 33.

[0065] The other of the pair of third projections 110c is positioned at the boundary between the third surface 122a and the fourth surface 122b. When the fixing portion 33 is inserted into the insertion portion 100, the other third projection 110c protrudes toward the fixing portion 33.

[0066] In the cross-sectional view shown in Figure 4, when the fixing portion 33 is inserted into the insertion portion 100, the pair of third projections 110c may support the reflective mirror 30 by sandwiching the fixing portion 33 from the front surface 31a side and the back surface 31b side of the reflective mirror 30. The pair of third projections 110c may face each other or be spaced apart without facing each other.

[0067] A second projection 110b may be further formed on the bottom portion 102. The second projection 110b may be a projection that protrudes from the bottom portion 102 toward the first opening (the entrance to the insertion portion 100). The second projection 110b may be hemispherical or arch-shaped.

[0068] As shown in Figure 4, the fixing portion 33 of the reflective mirror 30 may further have a protruding portion 34. The protruding portion 34 may protrude toward the second surface 122 when the fixing portion 33 is inserted into the insertion portion 100. In this case, the protruding portion 34 may be in contact with the third surface 122a of the second surface 122. As a result, the back surface 31b of the reflective mirror 30 may be pressed against the engaging portion 113 so that the fixing portion 33 is in an upright position relative to the third surface 122a. In this case, the back surface 31b of the reflective mirror 30 and the first straight line V1 may be substantially parallel.

[0069] Furthermore, an inclined surface 34a may be formed on the Z-axis negative side of the protruding portion 34. In this case, when inserting the reflective mirror 30 into the insertion portion 100, the inclined surface 34a is guided by the second rib 120 which forms the opening 101. This makes it easier to insert the reflective mirror 30 into the insertion portion 100.

[0070] As shown in Figure 8, a guide 37 may be further formed on the surface 31a of the reflective mirror 30. The guide 37 is formed on the X-axis positive side surface of the fixing portion 33 so as to be along the longitudinal direction of the second surface 122 of the second rib 120, i.e., in the Z-axis direction. When inserting the reflective mirror 30 into the insertion portion 100, the guide 37 is guided by the second rib 120 of the insertion portion 100. This makes it easier to insert the reflective mirror 30 into the insertion portion 100.

[0071] Furthermore, the guide 37 may be in contact with the second rib 120. In this way, the guide 37 may be positioned to cover the gap between the second surface 122 and the fixing portion 33. Note that the guide 37 may be divided into multiple parts.

[0072] As shown in Figure 9, the fixing portion 33 may have a first side surface 33c located on the Z-axis positive side and a second side surface 33d on the opposite side of the first side surface 33c and located on the Z-axis negative side. A measuring portion 36 may be formed on the back surface 31b of the reflective mirror 30 and positioned on the fixing portion 33. The measuring portion 36 may extend linearly from the first side surface 33c to the second side surface 33d so as to be perpendicular to the first side surface 33c and the second side surface 33d. In this embodiment, the measuring portion 36 is a groove extending along the insertion direction, but it may also be a long projection extending along the insertion direction, and is not limited to Figure 9. The measuring portion 36 may be formed in a recess or protrusion at the Z-axis positive end P1 and the Z-axis negative end P2 of the fixing portion 33, respectively.

[0073] Note that the positions of ends P1 and P2 are merely examples. For example, they could be the positions of ends P1' and P2' which form corners in the measuring section 36. In other words, ends P1, P2, P1', and P2' only need to be located in the measuring section 36 and included in a straight line parallel to the Z-axis direction.

[0074] This allows a measuring instrument to be used to determine whether the reflective mirror 30 is positioned in the housing 10 in the desired orientation.

[0075] As shown in Figure 10, when measuring the orientation of the reflecting mirror 30, the angle θ2 of the reflecting mirror 30 is calculated. The angle θ2 is calculated as θ2 = arcsin(L / M). L is the horizontal length of the fixing part 33 when the fixing part 33 is viewed along the vertical downward direction when the fixing part 33 is inserted into the insertion part 100. In other words, L represents the length when the end P1 on the Z-axis minus direction side of the measuring part 36 and the end P2 on the Z-axis plus direction side of the measuring part 36 in Figure 9 are projected onto a horizontal plane. M is the length of the fixing part 33 in the Z-axis direction.

[0076] Furthermore, when the reflective mirror 30 is attached to the housing 10, it may be necessary to check whether the reflective mirror 30 is positioned correctly. Therefore, the head-up display 1 sets a reference point that serves as the measurement standard.

[0077] In this embodiment, as shown in Figures 11 and 12, by forming a reference point hole 110b1 in the second projection 110b, the mounting position of the reflective mirror 30 with respect to the vehicle reference position of the part of the housing 10 that connects to the vehicle 2 can be accurately measured when viewed from vertically above. This makes it possible to confirm whether or not the reflective mirror 30 is positioned correctly.

[0078] Specifically, the reference point is the intersection of a straight line W1, which passes through the center of the insertion portion 100 in the width direction (X-axis direction) and is parallel to the Z-axis direction, and the second projection 110b. This intersection point may be the point where the reflective mirror 30 contacts the insertion portion 100 when it is mounted in the correct orientation. A hole 110b1 of a predetermined radius can be formed with a straight line W2 along the vertical direction passing through the reference point as the central axis. In this case, when the head-up display 1 is mounted on the vehicle 2, the hole 110b1 is circular (preferably a perfect circle) when viewed along the straight line W2.

[0079] At this time, when the width of the second projection 110b along the X-axis direction is N, the inner diameter of the hole 110b1 when viewed along the line W2 is c, the opening diameter of the hole 110b1 along the X-axis direction is a, the thickness b between the inner surface of the hole 110b1 and the end of the second projection 110b on the X-axis positive side is b, and the acute angle θ3 is formed between the line W1 and the line W2, N>a a = c / cosθ3 b>0mm The relationship is to be satisfied. The reason for setting b > 0 mm is that if the depth of hole 110b1 is too shallow, it becomes difficult to visually recognize the shape of hole 110b1 as circular.

[0080] The direction in which the insertion portion 100 extends (Z-axis direction) and the direction in which the hole 110b1 extends (direction along the line W2) may not be parallel. In this case, the first line V1 and line W2 may intersect or intersect in a three-dimensional manner.

[0081] In this way, a reference point and a straight line W1 are set in the housing 10, and by forming an insertion part 100 corresponding to the straight line W1, the orientation of the fixing part 33 can be set.

[0082] <Effects and Effects> Next, the effects and advantages of the head-up display 1 in this embodiment will be described.

[0083] As described above, the head-up display 1 of Technology 1 according to this embodiment comprises an image generation device 50, a mirror (reflective mirror 30) having a fixed portion 33, and a housing 10 that houses the image generation device 50 and the mirror (reflective mirror 30). The housing 10 has an insertion portion 100 into which the fixed portion 33 is inserted to support the mirror (reflective mirror 30). The insertion portion 100 has an opening 101 into which the fixed portion 33 is inserted, and a bottom portion that supports one end edge of the inserted fixed portion 33. The insertion portion 100 has a first surface 111 that faces the back surface 31b of the mirror (reflective mirror 30) and extends along the first straight line V1, and a second surface 122 that faces the front surface 31a of the mirror (reflective mirror 30). The insertion portion 100 has an engaging portion 113 that fixes the other end edge of the fixing portion 33 and is connected to the first surface 111. When the fixing portion 33 is not inserted into the insertion portion 100, the distance between the first straight line V1 and the second surface 122 narrows in the direction of insertion of the fixing portion 33 into the insertion portion 100.

[0084] According to this design, the insertion section 100 for inserting the reflective mirror 30 widens from the back towards the entrance, making it easier to insert the reflective mirror 30 into the insertion section 100. When the reflective mirror 30 is pushed in along the insertion direction, the fixing part 33 comes into contact with the bottom part 102, and the engaging part 113 engages with the fixing part 33. In this way, the operator can fix the reflective mirror 30 in the insertion section 100 simply by pushing the reflective mirror 30 into the insertion section 100 along the insertion direction.

[0085] Therefore, this head-up display 1 offers excellent assembly capabilities.

[0086] Furthermore, the head-up display 1 of Technology 2 according to this embodiment is the head-up display 1 described in Technology 1. In this case, the second surface 122 is located on the engagement portion 113 side and has a third surface 122a that extends along the second straight line V2 and a fourth surface 122b located on the bottom portion 102 side. When the fixing portion 33 is not inserted into the insertion portion 100, the distance between the first straight line V1 and the second straight line V2 narrows in the direction of insertion of the fixing portion 33 into the insertion portion 100.

[0087] According to this, the gap between the third surface 122a and the engaging portion 113 widens as it approaches the entrance of the insertion portion 100, making it easier to insert the reflective mirror 30 into the insertion portion 100. Also, when the fixing portion 33 of the reflective mirror 30 is inserted into the insertion portion 100, the fixing portion 33 is guided by the third surface 122a, so the fixing portion 33 slides toward the bottom portion 102 while sliding against the third surface 122a. This eliminates the need for the worker to force the reflective mirror 30 into the insertion portion 100, making it less likely for the surface 31a of the reflective mirror 30 to be damaged by the insertion portion 100 during insertion.

[0088] Furthermore, the head-up display 1 of Technology 3 according to this embodiment is the head-up display 1 described in Technology 1 or 2. In this case, the insertion portion 100 has a pair of first protrusions 110a that are arranged on the bottom portion 102 side and protrude toward each other. When the fixing portion 33 is inserted into the insertion portion 100, one of the pair of first protrusions 110a is formed on the first surface 111 and protrudes toward the fixing portion 33. When the fixing portion 33 is inserted into the insertion portion 100, the other of the pair of first protrusions 110a is formed on the second surface 122 and protrudes toward the fixing portion 33.

[0089] According to this, the fixing part 33 can be supported by a pair of first protrusions 110a that sandwich the fixing part 33. Therefore, rattling along the direction perpendicular to the insertion direction on the bottom 102 side of the reflective mirror 30 can be suppressed.

[0090] Furthermore, the head-up display 1 of Technology 4 according to this embodiment is the head-up display 1 described in any one of Technologies 1 to 3. In this case, a second projection 110b is formed on the bottom portion 102.

[0091] According to this, when the fixing portion 33 is inserted into the insertion portion 100, the second projection 110b abuts against one end edge of the fixing portion 33, so the second projection 110b can apply a reaction force toward the entrance side of the insertion portion 100 relative to one end edge of the fixing portion 33. Also, since one end edge of the fixing portion 33 engages with the engaging portion 113, the fixing portion 33 is subjected to stress along the insertion direction by the engaging portion 113. Therefore, the fixing portion 33 can be fixed by being sandwiched between the second projection 110b and the engaging portion 113 from both ends. As a result, rattling along the insertion direction in the reflective mirror 30 can be suppressed.

[0092] Furthermore, the head-up display 1 of Technology 5 according to this embodiment is the head-up display 1 described in Technology 4. In this case, a hole 110b1 is formed in the second projection 110b.

[0093] According to this, the mounting position of the reflective mirror 30 attached to the housing 10 can be accurately measured and functioned as a reference position. Therefore, it is possible to measure whether or not the reflective mirror 30 is mounted on the housing 10 in the correct orientation.

[0094] Furthermore, the head-up display 1 of Technology 6 according to this embodiment is the head-up display 1 described in Technology 5. In this case, the first direction in which the insertion portion 100 extends and the second direction in which the hole 110b1 extends are non-parallel.

[0095] According to this, a first and second direction can be defined with respect to the hole 110b1, so it is possible to measure whether or not the reflective mirror 30 is mounted on the housing 10 in the correct orientation.

[0096] Furthermore, the head-up display 1 of Technology 7 according to this embodiment is the head-up display 1 described in Technology 6. In this case, the hole 110b1 is circular when viewed along the vertical direction when the head-up display 1 is mounted on the vehicle 2.

[0097] According to this, the central axis of the hole 110b1 can be defined as a reference line parallel to the second direction, making it possible to measure whether or not the reflective mirror 30 is mounted on the housing 10 in the correct orientation.

[0098] Furthermore, the head-up display 1 of Technology 8 according to this embodiment is the head-up display 1 described in any one of Technologies 4 to 7. In this case, the second projection 110b is hemispherical or arch-shaped.

[0099] According to this, the second projection 110b is always positioned to follow one end edge of the fixing part 33, thereby stabilizing the posture of the reflective mirror 30.

[0100] Furthermore, the head-up display 1 of Technology 9 according to this embodiment is the head-up display 1 described in Technology 2. In this case, the insertion portion 100 has a pair of third protrusions 110c that are positioned between the bottom portion 102 and the opening 101 and protrude toward each other. When the fixing portion 33 is inserted into the insertion portion 100, one of the pair of third protrusions 110c is formed on the first surface 111 and protrudes toward the fixing portion 33. When the fixing portion 33 is inserted into the insertion portion 100, the other of the pair of third protrusions 110c is positioned at the boundary between the third surface 122a and the fourth surface 122b and protrudes toward the fixing portion 33.

[0101] According to this, the fixing part 33 can be supported by a pair of third protrusions 110c that sandwich the fixing part 33. Therefore, rattle along the direction perpendicular to the insertion direction in the intermediate portion between one end edge of the fixing part 33 (the end on the Z-axis positive direction) and the other end edge of the fixing part 33 (the end on the Z-axis negative direction) can be further suppressed.

[0102] Furthermore, the head-up display 1 of Technology 10 according to this embodiment is the head-up display 1 described in any one of Technologies 1 to 9. In this case, the engaging portion 113 has a connecting portion 114 extending from the first surface 111 along the first straight line V1, and a claw portion 115 positioned at the tip of the connecting portion 114.

[0103] According to this, the other end edge of the fixing part 33 can be supported by the claw part 115. Therefore, rattling along the direction perpendicular to the insertion direction on the other end edge side of the fixing part 33 can be suppressed.

[0104] Furthermore, the head-up display 1 of Technology 11 according to this embodiment is the head-up display 1 described in Technology 10. In this case, the engaging portion 113 further has a guide portion 116 that extends from the claw portion 115 in a direction intersecting the first straight line V1 so as to separate from the fixing portion 33 when the fixing portion 33 is inserted into the insertion portion 100.

[0105] According to this, when inserting the reflective mirror 30 into the insertion section 100, the guide section 116 can guide one end edge of the fixing section 33 on the reflective mirror 30. This makes it easier to insert the reflective mirror 30 into the insertion section 100.

[0106] Furthermore, since the worker can pinch the guide portion 116 with their fingers or hook it with their fingernail, it becomes easier to attach and detach the reflective mirror 30 from the housing 10.

[0107] Furthermore, the head-up display 1 of Technology 12 according to this embodiment is the head-up display 1 described in Technology 11. In this case, when the fixing part 33 is inserted into the insertion part 100, the distance between the end of the guide part 116 and the fixing part 33 is 0.8 mm or more.

[0108] According to this, a space can be formed between the end of the guide portion 116 and the fixing portion 33 in which a person can insert their fingernail. Therefore, by elastically deforming it in the negative X-axis direction with a finger, the reflective mirror 30 can be attached to and detached from the housing 10 more easily.

[0109] Furthermore, the head-up display 1 of Technology 13 according to this embodiment is the head-up display 1 described in Technology 11 or 12. In this case, when the fixing part 33 is inserted into the insertion part 100, the angle between the guide part 116 and the fixing part 33 is 20° to 45°.

[0110] According to this, a gap can be formed between the end of the guide portion 116 and the fixing portion 33. Therefore, by elastically deforming it in the negative X-axis direction with a finger, the reflective mirror 30 becomes easier to attach to and detach from the housing 10.

[0111] Furthermore, the head-up display 1 of Technology 14 according to this embodiment is the head-up display 1 described in any one of Technologies 1 to 13. In this case, a guide 37 is formed on the surface 31a of the mirror (reflective mirror 30).

[0112] According to this, the guide 37 is positioned to cover the gap between the second surface 122 and the fixing part 33, thereby preventing dust and dirt from entering through the gap.

[0113] Furthermore, when inserting the reflective mirror 30 into the insertion section 100, the guide 37 is guided by the second rib 120 of the insertion section 100. As a result, the reflective mirror 30 can be inserted into the insertion section 100 without rotating the reflective mirror 30 around a straight line perpendicular to the surface 31a of the reflective mirror 30. Therefore, this head-up display 1 is easier to assemble.

[0114] Furthermore, the head-up display 1 of Technology 15 according to this embodiment is the head-up display 1 described in any one of Technologies 1 to 14. In this case, a measuring unit 36 ​​is formed on the back surface 31b of the mirror (reflective mirror 30) and is located on the fixing unit 33.

[0115] According to this, when measuring whether the reflective mirror 30 is mounted on the housing 10 in the correct orientation, a measuring instrument can be used to measure whether the reflective mirror 30 is positioned on the housing 10 in the desired orientation.

[0116] Furthermore, the head-up display 1 of Technology 16 according to this embodiment is the head-up display 1 described in Technology 15. In this case, the fixing portion 33 has a first side surface 33c located on the engagement portion 113 side and a second side surface 33d which is the opposite side of the first side surface 33c and located on the bottom portion 102 side, and the measuring portion is a recess or protrusion that extends linearly from the first side surface 33c to the second side surface 33d so as to be perpendicular to the first side surface 33c and the second side surface 33d.

[0117] According to this, when measuring whether the reflective mirror 30 is mounted on the housing 10 in the correct orientation, a measuring instrument can be used to more accurately measure whether the reflective mirror 30 is positioned on the housing 10 in the desired orientation.

[0118] Furthermore, the head-up display 1 of Technology 17 according to this embodiment is the head-up display 1 described in any one of Technologies 1 to 16. In this case, the fixing part 33 has a protruding part 34, and the protruding part 34 protrudes toward the second surface 122 when the fixing part 33 is inserted into the insertion part 100.

[0119] According to this, the back surface 31b of the reflective mirror 30 approaches the engaging portion 113 so that the protruding portion 34 comes into contact with the third surface 122a, causing the fixing portion 33 to rise relative to the third surface 122a. Therefore, rattling along the direction perpendicular to the insertion direction on the other end edge of the fixing portion 33 can be suppressed.

[0120] (Other variations) The head-up display relating to this disclosure has been described above based on the embodiments described above, but this disclosure is not limited to these embodiments. Various modifications to the embodiments that a person skilled in the art can conceive of may also be included in the scope of this disclosure, as long as they do not deviate from the spirit of this disclosure.

[0121] Furthermore, this disclosure also includes forms obtained by applying various modifications to the above embodiments that a person skilled in the art could conceive, and forms realized by arbitrarily combining the components and functions of the embodiments without departing from the spirit of this disclosure. [Industrial applicability]

[0122] This disclosure is applicable to head-up displays mounted in vehicles. [Explanation of Symbols]

[0123] 1. Head-up display 10 cabinets 30 Reflective Mirrors (Mirrors) 30a First Reflecting Mirror (Mirror) 30b Second Reflecting Mirror (Mirror) 31a surface 31b back side 33 Fixed part 33c 1st side 33d Second side view 34 Protrusion 36 Measurement Unit 37 Guide 50 Image generation device 100 Insertion part 101 Aperture 102 Bottom 110a 1st protrusion 110b 2nd protrusion 110b1 hole 110c 3rd protrusion 111 Page 1 113 Engaging part 114 Connection part 115 Claw part 116 Information Department 122 Page 2 122a Page 3 122b Page 4 V1 First Straight Line V2 Second Straight Line

Claims

1. Image generation device and A mirror having a fixed part, The system comprises the image generating device and a housing that accommodates the mirror, The housing has an insertion portion that supports the mirror when the fixing portion is inserted into it. The insertion portion has an opening into which the fixing portion is inserted, a bottom portion that supports one end edge of the inserted fixing portion, a first surface that faces the back surface of the mirror and extends along a first straight line, and a second surface that faces the front surface of the mirror. The insertion portion has an engaging portion that fixes the other end edge of the fixing portion and is connected to the first surface. When the fixing portion is not inserted into the insertion portion, the distance between the first straight line and the second surface narrows in the direction of insertion of the fixing portion into the insertion portion. Head-up display.

2. The second surface is located on the engagement side and has a third surface extending along the second straight line and a fourth surface located on the bottom side. When the fixing portion is not inserted into the insertion portion, the distance between the first straight line and the second straight line narrows in the direction of insertion of the fixing portion into the insertion portion. The head-up display according to claim 1.

3. The insertion portion has a pair of first protrusions formed on the bottom side, which are positioned and protrude toward each other. When the fixing portion is inserted into the insertion portion, one of the pair of first protrusions is formed on the first surface and protrudes toward the fixing portion. When the fixing portion is inserted into the insertion portion, the other first projection of the pair of first projections is formed on the second surface and protrudes toward the fixing portion. The head-up display according to claim 1 or 2.

4. A second projection is formed on the bottom portion. The head-up display according to claim 1 or 2.

5. A hole is formed in the second projection. The head-up display according to claim 4.

6. The first direction in which the insertion portion extends and the second direction in which the hole extends are non-parallel. The head-up display according to claim 5.

7. The aforementioned hole is circular when viewed along the vertical direction when the head-up display is mounted in the vehicle. The head-up display according to claim 6.

8. The second projection is hemispherical or arch-shaped. The head-up display according to claim 5.

9. The insertion portion has a pair of third protrusions formed therein, which are positioned between the bottom and the opening and protrude toward each other. When the fixing portion is inserted into the insertion portion, one of the pair of third protrusions is formed on the first surface and protrudes toward the fixing portion. When the fixing portion is inserted into the insertion portion, the other of the pair of third protrusions is positioned at the boundary between the third surface and the fourth surface and protrudes toward the fixing portion. The head-up display according to claim 2.

10. The engaging portion has a connecting portion extending from the first surface along the first straight line and a claw portion positioned at the tip of the connecting portion. The head-up display according to claim 1 or 2.

11. The engaging portion further includes a guide portion that extends from the claw portion in a direction intersecting the first straight line, such that it separates from the fixing portion when the fixing portion is inserted into the insertion portion. The head-up display according to claim 10.

12. When the fixing portion is inserted into the insertion portion, the distance between the end of the guide portion and the fixing portion is 0.8 mm or more. The head-up display according to claim 11.

13. When the fixing portion is inserted into the insertion portion, the angle between the guide portion and the fixing portion is 20° to 45°. The head-up display according to claim 11.

14. Guides are formed on the surface of the mirror. The head-up display according to claim 1 or 2.

15. A measuring section is formed on the back surface of the mirror, which is positioned on the fixed part. The head-up display according to claim 1 or 2.

16. The fixing portion has a first side surface located on the engagement portion side and a second side surface which is the opposite side of the first side surface and located on the bottom side. The measuring portion is a recess or protrusion that extends linearly from the first side surface to the second side surface, perpendicular to the first side surface and the second side surface. The head-up display according to claim 15.

17. The aforementioned fixing portion has a protruding portion, The protruding portion protrudes toward the second surface when the fixing portion is inserted into the insertion portion. The head-up display according to claim 1 or 2.

Images