CN215793176U

CN215793176U - Head-up display device

Info

Publication number: CN215793176U
Application number: CN202090000422.8U
Authority: CN
Inventors: 岩屋太阳; 牛田典彦; 渡边雅博
Original assignee: Nippon Seiki Co Ltd
Current assignee: Nippon Seiki Co Ltd
Priority date: 2019-03-22
Filing date: 2020-03-18
Publication date: 2022-02-11
Anticipated expiration: 2030-03-18
Also published as: DE202020005790U1; WO2020196160A1; JPWO2020196160A1; DE112020001390T5; JP7396350B2

Abstract

The utility model provides a head-up display (HUD) device capable of reducing abrasion of a specified component along with rotation of a reflection part. The HUD device is provided with: a display unit that emits display light for displaying an image; a supported part (60) made of resin is arranged at the end part; a reflection unit that reflects display light; the supported part (60) is supported by a supporting part (70) which can rotate around the Axis (AX). The support part (70) is provided with: a metal member (M) having a convex support surface (Ma); and a resin fixing portion (71) for fixing the metal member (M). The supported portion (60) has a concave supported surface (61). The HUD device is configured in such a manner that a convex supporting surface (Ma) and a concave supported surface (61) are in contact with each other in a manner of facing each other on an Axis (AX), and a supported part (60) slides and rotates relative to a metal member (M), so that a reflecting part can rotate around the Axis (AX).

Description

Head-up display device

Technical Field

The present invention relates to a head-up display device.

Background

There is known a Head-Up Display (HUD) device that displays a Display image as a virtual image by emitting Display light of the image to a front windshield or the like of a vehicle. As a conventional HUD device, for example, patent document 1 discloses a device including: a reflection unit (for example, a concave mirror) that reflects the display light; a supported part fixedly provided with respect to the reflecting part; and a support portion which is supported by the support portion so as to be rotatable about a predetermined axis, and the reflection portion is configured to be rotatable. Patent document 1 discloses an example in which each of the supported portion and the supporting portion is formed of a synthetic resin.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 6455268

When the supported portion and the supporting portion are each formed of a synthetic resin, the both may be worn away with rotation of the reflecting portion, and thus there is room for improvement.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of the above circumstances, and an object thereof is to provide a head-up display device capable of reducing wear of a predetermined member accompanying rotation of a reflection unit.

In order to achieve the above object, a head-up display device according to the present invention includes:

a display unit that emits display light for displaying an image;

a reflecting portion having a supported portion made of resin at an end portion thereof and reflecting the display light; and

a support portion that supports the supported portion so as to be rotatable about a predetermined axis,

the support portion includes: a metal member having a convex curved surface; and a fixing portion made of resin for fixing the metal member,

the supported portion has a concave supported surface,

the convex curved surface and the concave supported surface are in contact with each other so as to face each other on the predetermined axis, and the supported portion is configured to be rotatable about the axis by sliding and rotating with respect to the metal member.

Effect of the utility model

According to the present invention, wear of a predetermined member associated with rotation of the reflection unit can be reduced.

Drawings

Fig. 1 is a view showing a mounting mode of a head-up display (HUD) device according to an embodiment of the present invention on a vehicle.

Fig. 2 is a schematic plan view of the HUD device with the upper cover omitted.

Fig. 3 is a perspective view of the mirror unit and the mirror driving unit.

Fig. 4 is an exploded perspective view of the mirror unit and the mirror driving unit.

Fig. 5 is an enlarged perspective view of a part of the mirror unit.

Fig. 6 is a sectional view of a main portion based on the line a-a shown in fig. 5.

Fig. 7 is a perspective view of the elastic member.

Fig. 8 is an exploded perspective view of the supported member and the supporting member.

Fig. 9 is a perspective view of the support member with the metal member omitted.

Fig. 10 is an enlarged perspective view of a part of the mirror unit and the mirror driving unit.

Fig. 11 is an enlarged perspective view of a part of the supported member.

Description of the symbols

100 head-up display (HUD) device

1 vehicle

2 Instrument panel

3 front windshield

4 users

L display light

Virtual image of V

C control part

H casing

10 display part

20 fold mirror

30 mirror unit

AV axis

31 reflection part

S mirror

31b axle plate part

32 supported member

32a fixed part

32b rod part

38 support member

38a mounting part

40 mirror driving part

42 motor

50 elastic member

51 first part

51a flat plate part

51b bump

51c convex part

52 second part

52a flat plate part

52b bulge

52c hole

53 connecting part

60 supported part

61 supported surface

61a to 61c surfaces

Da-Dc groove

62 insertion part

63 through hole

70 support part

71 fixed part

71a accommodating part

71b inclined plane

72 projection part

72a communication hole

M Metal part

Ma bearing surface

Detailed Description

An embodiment of the present invention will be described with reference to the drawings.

As shown in fig. 1, a head-up display (HUD) device 100 according to the present embodiment is disposed in, for example, an instrument panel 2 of a vehicle 1. The HUD device 100 emits display light L toward the front windshield 3. The display light L reflected by the front windshield 3 is directed toward the user 4 (mainly the driver of the vehicle 1) side, so that the user 4 visually recognizes the image displayed by the display light L as a virtual image V. The virtual image V is displayed in front of the vehicle 1 via the front windshield 3. The virtual image V displays various information (hereinafter referred to as vehicle information) related to the vehicle 1. The vehicle information includes not only information of the vehicle 1 itself but also external information of the vehicle 1.

As shown in fig. 2, the HUD device 100 includes a display unit 10, a folding mirror 20, a mirror unit 30 including a reflection unit 31, a mirror driving unit 40, a control unit C, and a housing H.

Hereinafter, each configuration will be described using the vertical direction of the vehicle 1 when the HUD device 100 is installed in the vehicle 1. In the appropriate figures, the upper is abbreviated as Up and the lower is abbreviated as Dn.

As shown in fig. 2, the display unit 10 displays an image, and emits display light L for displaying the image to the folding mirror 20. The Display unit 10 includes, for example, an LCD (Liquid Crystal Display) and a backlight for illuminating the LCD from behind. The LCD is, for example, a TFT (Thin Film Transistor) type LCD. The backlight is constituted by, for example, an LED (Light Emitting Diode), a Light guide member, and the like.

The folding mirror 20 is formed of, for example, a flat mirror, and reflects the display light L emitted from the display unit 10 toward the reflection unit 31. The folding mirror 20 is not limited to a flat mirror, and may be a curved mirror (including a free-form surface mirror).

As shown in fig. 2 to 5, the mirror unit 30 includes: a reflection section 31; a supported member 32 that is immovable with respect to the reflection section 31; a pair of

support members

38, 39 that support the reflection unit 31 so as to be rotatable about the axis AX; and an elastic member 50. The

support members

38 and 39 are located at positions sandwiching the reflection portion 31 in the direction in which the axis AX extends.

The reflection unit 31 is formed of, for example, a concave mirror having a mirror surface S formed on the surface of a resin material formed in a plate shape. The reflection unit 31 reflects the display light from the folding mirror 20 toward the front windshield 3 while amplifying it by the mirror surface S.

As shown in fig. 3, the reflection portion 31 is provided with a shaft portion 31a and a shaft plate portion 31b that project in opposite directions from the side surface of the reflection portion 31 along the axis AX. The shaft portion 31a is located on the right side of the reflection portion 31 in fig. 3 and 4, and is formed in a cylindrical shape. As shown in fig. 2, the shaft portion 31a is rotatably supported by a support member 39 fixed in the housing H. The shaft plate 31b is located on the left side of the reflection unit 31 in fig. 3 and 4, and is formed in a rectangular plate shape.

As shown mainly in fig. 5 and 8, the supported member 32 includes a supported portion 60, a fixed portion 32a, and a rod portion 32 b. As shown in fig. 2, the supported member 32 is rotatably supported by a support member 38 fixed in the housing H. For example, the structure of the supported member 32 other than the rod portion 32b is formed of a known resin material such as polycarbonate or polyacetal, and is integrally molded. The rod portion 32b is made of, for example, metal, and is attached to the supported portion 60 by fastening or fitting with a screw. The supported member 32 may be integrally molded including the rod portion 32 b. At least a part of the supported member 32 may be integrally molded with the reflection unit 31.

As shown in fig. 5, the supported portion 60 is a portion that faces a support portion 70 of the support member 39, which will be described later, in the direction in which the axis AX extends. Details of the supported portion 60 will be described later.

The fixed portion 32a is a portion of the supported member 32 fixed to the surface of the shaft plate portion 31 b. The fixed portion 32a is fixed to the shaft plate portion 31b by, for example, fastening, fixing, bonding, fitting with a screw. As shown in fig. 5, the supported portion 60 is located outside the fixed portion 32a along the axis AX. As shown in fig. 5, the lever portion 32b projects in a direction opposite to the direction in which the mirror surface S of the reflection portion 31 faces, and is provided on the supported portion 60. The lever portion 32b is sandwiched between later-described sliders 43b of the mirror driving portion 40.

As shown in fig. 3, the support member 38 is positioned on the left side of the supported member 3, and supports the left end portion of the reflection portion 31 via the supported member 32. As shown mainly in fig. 8 and 9, the support member 38 includes a support portion 70 and a mounting portion 38a to which the mirror driving portion 40 is mounted. Fig. 9 is a perspective view of the support member 38 shown without the metal member M described later.

As shown in fig. 5, the support portion 70 is located at a position facing the supported portion 60 of the supported member 32 in the direction in which the axis AX extends. The support portion 70 has a metal member M and a fixing portion 71 that fixes the metal member M. Details regarding the support portion 70 are described below.

As shown in fig. 5, the mounting portion 38a is a portion adjacent to the fixing portion 71 in the radial direction about the axis AX, and is positioned closer to the rear surface (surface on which the mirror surface S is not formed) of the reflection portion 31 than the fixing portion 71. As shown in fig. 9, the mounting portion 38a is formed in a vertically long plate shape. As shown in fig. 10, a mirror driving unit 40 is attached to a main surface of the attachment portion 38a facing the reflection unit 31. As shown in fig. 5 and 9, the support member 38 is provided with a pair of mounting

portions

38b and 38c that project in opposite directions from each other in a radial direction around the axis AX and that mount the support member 38 to the housing H. The pair of mounting

portions

38b and 38c are each formed in a plate shape substantially parallel to the bottom surface of the housing H. As shown in fig. 9, the fitting portion 38b is located at the upper end portion of the mounting portion 38a, and the fitting portion 38c protrudes from the fixing portion 71 in the radial direction around the axis AX. The pair of

fitting portions

38b and 38c are screwed from above to below to bosses (bosses), not shown, provided on the housing H, whereby the support member 38 is fixed to the housing H. The support member 38 is integrally molded with a known resin material such as polycarbonate, for example, except for the metal member M. In addition, the elastic member 50 will be described below.

As shown in fig. 10, the mirror driving unit 40 includes: a motor 42; a conversion mechanism 43 that converts the rotational motion of the motor 42 into a linear motion; a holding member 45 that holds the motor 42 and the conversion mechanism 43; and a position detection section 47.

The conversion mechanism 43 includes a lead screw 43a and a slider 43 b. The holding member 45 holds the motor 42 and the lead screw 43a and is fixed to the support member 38. The holding member 45 includes: the first plate portion 45 a; a second plate portion 45b extending from an upper end of the first plate portion 45a in a direction orthogonal to the first plate portion 45 a; and a third plate portion 45c extending from the lower end of the first plate portion 45a in the same direction as the second plate portion 45 b. The first plate portion 45a is fixed to the mounting portion 38a of the support member 38 by, for example, fastening, fixing, bonding, fitting with a screw. The holding member 45 is fixed to the support member 38 by fixing the first plate portion 45a to the mounting portion 38 a. A motor 42 is fixed to the upper surface of the second plate portion 45 b. The motor 42 is driven by the control of the control unit C to axially rotate a lead screw 43a extending in the vertical direction. A rod-shaped lead screw 43a is rotatably supported between the second plate portion 45b and the third plate portion 45 c. A screw is cut on the outer periphery of the screw shaft 43 a.

The slider 43b has a shape that sandwiches the rod portion 32b of the mirror unit 30. The slider 43b engages with the outer periphery of the screw shaft 43a, and moves in the axial direction of the screw shaft 43a as the shaft of the screw shaft 43a rotates. When the slider 43b moves in the axial direction (vertical direction) of the lead screw 43a, the reflection portion 31 rotates about the axis AX via the rod portion 32 b. Specifically, the slider 43b includes a contact convex portion 43c in point contact with the lever portion 32b, and a clamp portion 43d for pressing the lever portion 32b toward the contact convex portion 43 c. The clamp portion 43d is formed by bending a metal plate into a V shape. The front end of the clamping portion 43d is located at a position facing the contact convex portion 43c in the vertical direction. The contact protrusion 43c has a hemispherical shape protruding toward the lever 32, and sandwiches the lever 32b together with the clamp 43.

The position detector 47 detects that the slider 43b has reached the upper portion of the screw 43a, that is, that the reflection unit 31 has reached the parking position, and outputs the detection result to the controller C. The position detecting unit 47 is constituted by, for example, a push switch pushed by the slider 43b reaching the upper portion of the screw shaft 43 a.

The control Unit C schematically shown in fig. 2 controls the overall operation of the HUD device 100, and is constituted by a microcomputer having a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The control unit C is mounted on a printed circuit board accommodated in a predetermined portion of the housing H. As an example, the printed circuit board is fixed to the lower surface side of the bottom of the housing H. The control section C controls the driving of the motor 42 in the mirror driving section 40 to rotate the mirror unit 30, thereby controlling the display position of the virtual image V in the up-down direction. The Control Unit C communicates with a system such as an ECU (Electronic Control Unit) that controls each part of the vehicle 1, and causes the display Unit 10 to display an image representing vehicle information.

The case H shown in fig. 2 is formed of metal or synthetic resin into a box shape having a light-shielding property and a bottom opening upward. The housing H accommodates the display unit 10, the folding mirror 20, the mirror unit 30, the mirror driving unit 40, and the control unit C at positions satisfying the above-described functions. The HUD device 100 includes an upper cover attached to the housing H from above, as a configuration not shown. The upper cover is provided with an exit 101 (see fig. 1) opening toward the front surface side, and the HUD device 100 emits the display light L from the exit 101 toward the front windshield 3. A translucent cover, not shown, is attached to the ejection opening 101.

In the HUD device 100 configured as described above, the display light L emitted from the display unit 10 and reflected in the order of the folding mirror 20 and the reflection unit 31 is emitted from the emission port 101 to the outside of the HUD device 100 and directed toward the front windshield 3. The display light L is reflected by the front windshield 3, and thereby a virtual image V is displayed in front of the front windshield 3 as viewed from the user 4.

(elastic member 50, supported portion 60, and supporting portion 70)

Hereinafter, the elastic member 50, the supported portion 60, and the supporting portion 70 will be specifically described.

As shown in fig. 6 and the like, the metal member M of the support portion 70 is formed into a substantially spherical sphere. The metal member M is formed of a known metal (including a synthetic metal) having excellent rigidity, for example, SUJ2 (high carbon chromium bearing steel). The supporting portion 70 supports the supported portion 60 on a supporting surface Ma that is a curved surface (spherical surface) of the metal member M and that protrudes toward the supported portion 60. That is, the HUD device 100 is configured such that the supported portion 60 slides and rotates with respect to the metal member M of the support portion 70, and thereby the reflection portion 31 can rotate around the axis AX.

As shown mainly in fig. 6, the fixing portion 71 includes: an accommodating portion 71a that accommodates the metal member M; and a protrusion 72 protruding in a direction away from the metal member M along the axis AX.

The housing portion 71a is a recessed portion forming a cylindrical space with the axis AX as the center, exposes the support surface Ma of the metal member M toward the supported portion 60, and houses the metal member M. The metal member M is fixed by being pressed into the housing portion 71 a. Therefore, the inner diameter of the housing portion 71a is formed slightly smaller than the outer diameter of the metal member M around the axis AX.

The projection 72 is formed in a cylindrical shape around the axis AX, and has a communication hole 72a that communicates the housing portion 71a with the outside of the fixing portion 71 (the right space in fig. 6). When the metal member M is press-fitted into the housing portion 71a, the communication hole 72a allows air to be released from the housing portion 71a to the outside of the fixing portion 71, and the metal member M can be press-fitted satisfactorily. The protrusion 72 is inserted into a hole 52c of the elastic member 50 described later.

Further, the fixing portion 71 in a state where the metal member M is not press-fitted is molded with resin in a state where an opening end of the communicating hole 72a on the accommodating portion 71a side has a sharp edge. When the metal member M is press-fitted into the housing portion 71a of the fixing portion 71 thus molded, as shown in fig. 6, the opening end of the communication hole 72a is depressed in a curved shape toward the protrusion portion 72, and a press-bent state is achieved. By thus press-fitting the metal member M into the housing portion 71a, the metal member M is stably housed in the inner bottom surface of the housing portion 71a (the surface where the communication hole 72a is located), and the center of the metal member M is suppressed from being displaced from the axis AX.

As shown in fig. 6, the supported portion 60 includes: a supported surface 61 that abuts against the supporting surface Ma of the metal member M, and an insertion portion 62 into which a first portion 51 of the elastic member 50 described later is inserted.

The supported surface 61 is provided at the right end of the supported portion 60 in fig. 6, and is formed so as to be recessed from the end surface 60a of the portion that bulges toward the metal member M toward the reflection portion 31 in the direction in which the axis AX extends. When the mirror unit 30 rotates, the supported surface 61 slides on the supporting surface Ma of the metal member M to rotate.

As shown in fig. 6, a through hole 63 (an example of a concave portion) penetrating the insertion portion 62 toward the metal member M along the axis AX is formed in the inner surface of the insertion portion 62 on the metal member M side. Instead of the through hole 63, a bottomed hole (another example of a recess) recessed toward the metal member M along the axis AX may be provided.

Specifically, the supported surface 61 is formed in a triangular pyramid shape whose tip becomes narrower toward the reflection unit 31 with the axis AX as the center. Here, when an imaginary triangular pyramid having a bottom surface whose normal is the axis AX is considered on the metal member M side, the supported surface 61 has surfaces 61a to 61c corresponding to three surfaces other than the bottom surface of the triangular pyramid, as shown in fig. 11. In the supported portion 60, the

surfaces

61a, 61b, and 61c constituting the supported surface 61 are in contact with the supporting surface Ma (spherical surface) of the metal member M, and are supported by the metal member M while being in substantially 3-point contact. Thus, the supported portion 60 can slide on the support surface Ma of the metal member M with a small contact resistance and rotate, and can stably rotate about the axis AX. The

surfaces

61a, 61b, and 61c have the same area, and are set to have the same inclination with respect to the axis AX.

Among the

surfaces

61a, 61b, and 61c constituting the supported surface 61, adjacent grooves Da to Dc that do not contact the metal member M are formed therebetween. The grooves Da, Db, and Dc extend in a radial direction about the axis AX, and adjacent grooves are arranged at an angle of 120 ° from each other about the axis AX. By providing the grooves Da to Dc in this way, the generation of sink marks (flexure due to shrinkage) on the supported surface 61 can be suppressed when the supported portion 60 is molded by injection molding.

As shown in fig. 7, the elastic member 50 is formed of a plate spring formed in a U shape by a known metal material, for example. The elastic member 50 includes a first portion 51 and a second portion 52 facing each other in a direction in which the axis AX extends, and a coupling portion 53 coupling the first portion 51 and the second portion 52. The elastic member 50 presses the fixing portion 71 and the supported portion 60 against each other in the direction in which the axis AX extends.

The first portion 51 of the elastic member 50 has a convex portion 51c located on the axis AX and fitted into the through hole 63 provided in the insertion portion 62. In addition, the second portion 52 has a hole 52c into which the protrusion 72 is inserted. The elastic member 50 is locked to the insertion portion 62 and the fixing portion 71 by the projection 51c and the hole 52c formed in this manner, and the insertion portion 62 and the fixing portion 71 are sandwiched as shown in fig. 5.

Specifically, the first portion 51 has: a flat plate portion 51 a; a raised portion 51b which is narrower in area than the flat plate portion 51a and is raised toward the second portion 52 side; and a convex portion 51c protruding toward the second portion 52 side than the raised portion 51 b. The raised portion 51b and the convex portion 51c are formed concentrically around the axis AX. Further, a locking portion 51d for locking the first portion 51 is provided at a locked portion, not shown, provided in the insertion portion 62 on the distal end side of the flat plate portion 51 a. The second portion 52 has: the flat plate portion 52 a; a raised portion 52b which is narrower in area than the flat plate portion 52a and is raised toward the projecting portion 72 side; and a hole 52c formed in the ridge portion 52 b. The bulge portion 51b and the hole 52c are formed concentrically around the axis AX.

The first portion 51 is aligned with respect to the supported portion 60 by fitting the convex portion 51c of the through hole 63, and the raised portion 51b contacts the inner surface (surface on which the through hole 63 is formed) of the insertion portion 62, thereby pressing the insertion portion 62 toward the metal member M. As shown in fig. 6, the flat plate portion 51a does not contact the inner surface (the surface on which the through hole 63 is formed) of the insertion portion 62. The second portion 52 is positioned with respect to the fixing portion 71 by inserting the protrusion portion 72 into the hole 52c, and the protrusion portion 52b is brought into contact with an outer surface (a surface formed on the outer periphery of the protrusion portion 72) of the fixing portion 71, thereby pressing the fixing portion 71 toward the metal member M. As shown in fig. 6, the flat plate portion 52a does not contact the outer surface of the fixed portion 71 (the surface formed on the outer periphery of the protruding portion 72).

The outer surface of the fixing portion 71 in contact with the raised portion 52b faces the shape of the raised portion 52b, and is formed as an inclined surface 71b inclined toward the protrusion 72. The second portion 52 of the elastic member 50 having the elastic force sandwiched in the direction in which the axis AX extends can be stably guided around the protrusion 72 by the inclined surface 71 b.

The elastic member 50 configured as described above is sandwiched between the supported portion 60 and the fixing portion 71 by the raised portion 51b surrounding the convex portion 51c fitted into the through hole 63 and the raised portion 52b surrounding the hole 52c of the insertion protrusion 72. In this structure, the elastic force generated by the elastic member 50 to press the supported portion 60 and the fixing portion 71 against each other is less likely to be disengaged from the axis AX. As a result, the support portion 70 supports the reflection portion 31 via the supported portion 60 so as to be rotatable stably about the axis AX.

The present invention is not limited to the above embodiments and drawings. Modifications (including deletion of constituent elements) may be added as appropriate within a range not changing the gist of the present invention.

The display unit 10 is not limited to a display unit using an LCD, and a display unit using an OLED (Organic Light Emitting Diode) may be used. The display unit 10 may be a display unit using a reflective display Device such as a DMD (Digital micromirror Device) or an LCOS (Liquid Crystal On Silicon).

In addition, a plurality of folding mirrors 20 may be provided in the optical path of the display light L connecting the display unit 10 and the reflection unit 31. The number of the folding mirrors 20 used and how to fold the optical path of the display light L can be changed as appropriate according to design.

The projection target (light transmitting member) of the display light L is not limited to the front windshield 3 of the vehicle 1, and may be a combination of a plate-shaped half mirror, a hologram element, and the like.

The type of vehicle 1 mounted on the HUD device 100 is not limited, and the HUD device can be applied to various vehicles such as a motorcycle and a motorcycle. The HUD device 100 may be mounted on a vehicle other than the vehicle 1, such as an airplane, a ship, or a snow mobile (power sled).

Although the metal member M is formed of a substantially spherical ball as described above, the shape of the metal member M is arbitrary as long as it has the support surface Ma formed of a curved surface, and is not limited. For example, the metal member M may be an ellipsoid or a cylinder extending along the axis AX. When the metal member M is a columnar body, the support surface Ma formed of a curved surface may be formed at the end portion on the supported portion 60 side. The metal member M may be a metal film deposited on the surface of the resin sphere.

The fixing method of the metal member M to the fixing portion 71 is not limited to press fitting, and may be any method, and may be fixed by adhesion, fixing, welding, fitting, or the like. Further, the fixing portion 71 may be integrated with the metal member M by insert molding.

In the above, the example in which the supported surface 61 of the supported portion 60 is formed in the triangular pyramid shape has been described, but the shape of the supported surface 61 is not limited to this but is arbitrary. For example, the supported surface 61 may be formed in a conical shape, or may be formed in a curved surface corresponding to the supporting surface Ma of the metal member M.

The reflection unit 31 of the mirror unit 30 is preferably a concave mirror, but may be a mirror other than a concave mirror such as a flat mirror or a free-form surface mirror as long as it reflects the display light L.

(1) The HUD device 100 described above includes: a reflection unit 31 having a supported portion 60 made of resin at an end thereof and reflecting the display light L; and a support portion 70 that supports the supported portion 60 so as to be rotatable about the axis AX. The support portion 70 includes: a metal member M having a convex support surface Ma; and a fixing portion 71 made of resin for fixing the metal member M. The supported portion 60 has a concave supported surface 61. The HUD device 100 is configured such that the convex supporting surface Ma and the concave supported surface 61 face each other and abut on each other on the axis AX, and the supported portion 60 slides and rotates with respect to the metal member M, whereby the reflection portion can rotate about the axis AX.

According to this configuration, since the metal member M of the support portion 70 supports the reflection portion 31 via the supported portion 60, it is possible to reduce wear on the support portion 70 side accompanying rotation of the reflection portion 31.

(2) The HUD device 100 further includes an elastic member 50 that presses the fixed portion 71 and the supported portion 60 against each other in the direction in which the axis AX extends. The supported portion 60 has an insertion portion 62 into which the first portion 51 of the elastic member 50 is inserted, and the insertion portion 62 is formed with a recess (e.g., a through hole 63) recessed toward the metal member M along the axis AX. The fixing portion 71 has a protrusion 72 protruding in a direction away from the metal member M along the axis AX. The first portion 51 has a convex portion 51c located on the axis AX and fitted into the concave portion, and the second portion 52 has a hole 52c located on the axis AX and into which the protrusion 72 is inserted.

With this configuration, as described above, the force pressing the fixed portion 71 and the supported portion 60 against each other along the axis AX can be favorably applied. As a result, the reflection portion 31 can be supported by the support portion 70 via the supported portion 60 so as to be rotatable around the axis AX in a stable manner.

(3) The protrusion 72 is cylindrical about the axis AX, and has a communication hole 72a that communicates a space (housing portion 71a) in the fixing portion 71, in which the metal member M is housed, with the outside of the fixing portion 71.

With this structure, as described above, the metal member M is easily press-fitted into the fixing portion 71 and fixed.

(4) In addition, the first portion 51 of the elastic member 50 has: a raised portion 51b (an example of a first contact portion) located outside the convex portion 51c in a radial direction about the axis AX and contacting the insertion portion 62; and a flat plate portion 51a (an example of a first non-contact portion) located outside the raised portion 51b in the radial direction and not in contact with the insertion portion 62. The second portion 52 has: a raised portion 52b (an example of a second contact portion) located outside the hole 52c in the radial direction and contacting the fixing portion 71; and a flat plate portion 52a located outside the raised portion 52b in the radial direction and not in contact with the fixed portion 71.

According to this configuration, the elastic force of the elastic member 50 is suppressed from being applied to the supported portion 60 and the fixing portion 71 in the direction away from the axis AX, and the force pressing each other along the axis AX can be applied favorably.

(5) The supported surface 61 is formed in a triangular pyramid shape whose tip becomes narrower toward the reflection unit 31 with the axis AX as the center.

According to this structure, the contact area between the metal member M and the supported surface 61 is reduced, and the supported portion 60 is supported by the support portion 70 so as to be rotatable about the axis AX.

(6) For example, the metal member M is preferably press-fitted and fixed into the housing portion 71a of the fixing portion 71. Since assembly becomes easy.

(7) In addition, the metal member M is preferably a sphere. Due to the low price and easy press-in.

In the above description, descriptions of well-known technical matters are appropriately omitted for easy understanding of the present invention.

Claims

1. A head-up display device is characterized by comprising:

a display unit that emits display light for displaying an image;

the support portion has: a metal member having a convex curved surface; and a fixing portion made of resin for fixing the metal member,

the supported portion has a concave supported surface,

2. The head-up display device according to claim 1, comprising:

an elastic member having: a first portion that urges the supported portion toward the metal member; and a second portion that urges the fixing portion toward the metal member, the elastic member pressing the fixing portion and the supported portion against each other in a direction in which the axis extends,

the supported portion has an insertion portion into which the first portion is inserted,

a recess portion recessed toward the metal member along the axis is formed in the insertion portion,

the fixing portion has a projecting portion projecting in a direction away from the metal member along the axis,

the first portion having a convex portion located on the axis and fitting into the concave portion,

the second portion has a hole located on the axis and into which the protrusion is inserted.

3. Head-up display device according to claim 2,

the projection is cylindrical about the axis and has a communication hole that communicates a space in the fixing portion, in which the metal member is housed, with an outside of the fixing portion.

4. Head-up display device according to claim 2 or 3,

the first portion has: a first contact portion located outside the convex portion in a radial direction with the axis as a center, and contacting the insertion portion; and a first non-contact portion located outside the first contact portion in the radial direction, not contacting the insertion portion;

the second portion has: a second contact portion located outside the hole in the radial direction, contacting the fixing portion; and a second non-contact portion located outside the second contact portion in the radial direction, and not in contact with the fixing portion.

5. Head-up display device according to any one of claims 1 to 3,

the supported surface is formed in a triangular pyramid shape whose tip tapers toward the reflection unit with the axis as a center.

6. Head-up display device according to any one of claims 1 to 3,

the fixing portion has an accommodating portion accommodating the metal member,

the metal member is pressed into the housing portion and fixed.

7. Head-up display device according to any one of claims 1 to 3,

the metal part is a sphere.