JP7338629B2 - head-up display device - Google Patents

Description

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

2. Description of the Related Art Conventionally, a head-up display device has been known that displays a virtual image by irradiating a windshield or the like with display light. For example, the head-up display device described in Patent Document 1 includes a concave mirror that reflects display light, a holder that holds the concave mirror, a bearing (bearing member) that rotatably supports the rotating shaft of the holder, and a housing that includes the bearing. and a bearing holding portion for holding at a predetermined position.

JP 2017-90667 A

The inventors of the present application are considering forming the bearing holding portion integrally with the housing. However, in this configuration, when press-fitting the bearing into the bearing holding portion, it is necessary to press the bearing into the inner surface of the housing, which makes assembly difficult.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a head-up display device in which a bearing member can be easily assembled to a housing.

In order to achieve the above object, a head-up display device according to an aspect of the present invention has a display section for emitting display light, and a rotating shaft section, and reflects the display light from the display section toward a projected member. a housing having a housing for housing the mirror unit; and a bearing member configured separately from the housing for receiving the rotating shaft .
The housing has a through hole penetrating inside and outside of the accommodating portion.
The mirror unit is housed in the housing portion such that the rotating shaft portion is inserted into the through hole from the inside of the housing portion.
The bearing member is assembled in the through hole from the outside of the accommodating portion so as to bear the rotating shaft portion while the mirror unit is accommodated in the accommodating portion.
In a state in which the bearing member is assembled in the through hole, the bearing member is interposed between the inner surface of the through hole and the rotating shaft portion, and the rotating shaft portion is in contact with the inner surface of the through hole. do not.

According to the present invention, it becomes easy to assemble the bearing member to the housing in the head-up display device.

1 is a schematic diagram of a vehicle equipped with a head-up display device according to a first embodiment of the present invention; FIG. 1 is a schematic diagram showing the configuration of a head-up display device according to a first embodiment of the invention; FIG. 1 is a front view showing a head-up display device according to a first embodiment of the invention; FIG. It is a perspective view showing the inside of the housing of the head-up display device according to the first embodiment of the present invention. 1 is a perspective view showing a head-up display device with a bearing cover removed according to a first embodiment of the present invention; FIG. FIG. 2 is a perspective view showing a bearing holding portion to which a bearing member according to the first embodiment of the present invention is attached; FIG. 4 is a perspective view showing the bearing holding portion before the bearing member according to the first embodiment of the present invention is mounted; FIG. 3 is a cross-sectional view showing a bearing member, a bearing holding portion, etc. according to the first embodiment of the present invention; 1 is a perspective view showing a concave mirror holder according to a first embodiment of the invention; FIG. 1 is a perspective view showing a concave mirror driving unit according to a first embodiment of the invention; FIG. It is a perspective view showing a rotating shaft part and a bearing member concerning a 1st embodiment of the present invention. It is a perspective view showing a rotating shaft part and a bearing member concerning a 1st embodiment of the present invention. It is a perspective view showing a rotating shaft part and a bearing member concerning a 1st embodiment of the present invention. FIG. 7 is a cross-sectional view showing a rotating shaft and a bearing holding portion according to a second embodiment of the present invention; FIG. 8 is a cross-sectional view showing a lever portion and a grip portion according to a second embodiment of the present invention; FIG. 15 is an enlarged view of FIG. 14 according to the second embodiment of the present invention; FIG. 7 is a cross-sectional view showing a rotating shaft and a bearing holding portion according to a second embodiment of the present invention; FIG. 8 is a cross-sectional view showing a lever portion and a grip portion according to a second embodiment of the present invention; FIG. 7 is a cross-sectional view showing a rotating shaft and a bearing holding portion according to a second embodiment of the present invention; FIG. 8 is a cross-sectional view showing a lever portion and a grip portion according to a second embodiment of the present invention;

(First embodiment)
A first embodiment of a head-up display device according to the present invention will be described with reference to the drawings.

As shown in FIG. 1 , head-up display device 100 is installed in a dashboard of vehicle 200 . The head-up display device 100 emits display light L representing an image toward a windshield 201, which is an example of a projected member of the vehicle 200. As shown in FIG. The display light L is reflected by the windshield 201 and reaches the viewer 1 (mainly the driver of the vehicle 200). Thereby, the virtual image V is displayed so that it can be visually recognized by the viewer 1 .

As shown in FIG. 2, the head-up display device 100 includes a display section 10, a folding mirror member 20, a mirror unit 30, a mirror drive unit 40, a housing 60, a control section 70, and As shown in FIG. 9, a bearing cover 90 and bearing members 58a and 58b are provided.
In the following description, left and right, up and down, and front and back are defined based on the direction when the concave mirror 31 of the mirror unit 30 is viewed from the front. 3 to 20, the left is abbreviated as Lf, the right is abbreviated as Rt, the top is abbreviated as Up, the bottom is abbreviated as Dn, the front is abbreviated as Fr, and the back is abbreviated as Bk. . The horizontal direction corresponds to the X direction, the vertical direction corresponds to the Y direction, and the front/back direction corresponds to the Z direction.

As shown in FIG. 2 , the display unit 10 emits display light L representing an image under the control of the control unit 70 . The display unit 10 includes, for example, a light source and a liquid crystal display panel, both of which are not shown.

The folding mirror member 20 is made of, for example, a plane mirror, and reflects the display light L emitted from the display section 10 toward the mirror unit 30 . The folding mirror member 20 is formed by, for example, laminating aluminum on a base material made of a resin such as polycarbonate.

The housing 60 is made of non-translucent resin or metal and has a substantially hollow rectangular parallelepiped shape. An opening 61 is formed in the housing 60 at a position facing the windshield 201 . The housing 60 includes a curved plate-shaped window 50 that closes the opening 61 . The window portion 50 is made of translucent resin such as acrylic through which the display light L is transmitted. Each component of the head-up display device 100 is housed in the housing 60 .

As shown in FIG. 4, the housing 60 has a pair of bearing holders 62a and 62b that receive a pair of rotation shafts 35a and 35b of the concave mirror holder 35, which will be described later. The bearing holding portions 62a and 62b are arranged side by side along the X direction. The bearing holding portions 62 a and 62 b hold the rotating shaft portions 35 a and 35 b inside the housing 60 and have a U-shaped plate opening toward the window portion 50 . The bearing holding portions 62a and 62b are formed in a concave shape on the inner surface of the housing 60. As shown in FIG. As shown in FIG. 8, the bearing holding portions 62a and 62b are formed as concave grooves having holes penetrating the inside and outside of the housing 60. As shown in FIG. In other words, the bearing holding portions 62 a and 62 b are formed in a tunnel shape that connects the inside and outside of the housing 60 . Further, the bearing holding portions 62a, 62b extend along the rotating shaft portions 35a, 35b, one end of the bearing holding portions 62a, 62b is exposed inside the housing 60, and the other end of the bearing holding portions 62a, 62b is outside the housing. 60 is exposed to the outside.

As shown in FIG. 5, the bearing holding portions 62a and 62b are formed so as to be exposed to the outside of the housing 60. As shown in FIG.
Specifically, as shown in FIG. 7, the bearing holding portion 62a obliquely extends toward the lower side toward the rear side.
The bearing holding portion 62a includes an exposed end portion 62d, an inner end portion 62e, an open end portion 62f, and a holding end portion 62c.
The exposed end portion 62d is an end portion of the bearing holding portion 62a that is exposed while opening to the outside of the housing 60 and is far from the holder body portion 34 in the X direction. By exposing the exposed end portion 62d to the outside of the housing 60 while opening it, the bearing member 58a can be press-fitted into the bearing holding portion 62a from the exposed end portion 62d.
In addition, the inner end portion 62e is located on the opposite side of the exposed end portion 62d in the X direction. The inner end portion 62 e is an end portion of the bearing holding portion 62 a near the holder main body portion 34 and opens toward the holder main body portion 34 located in the internal space of the housing 60 .
Further, the open end portion 62f is opened upward and frontward toward the internal space of the housing 60 . The rotary shaft portion 35a is inserted into the open end portion 62f when the mirror unit 30 is assembled to the housing 60. As shown in FIG.
The holding end portion 62c is located on the opposite side of the opening end portion 62f in the Y direction, and is formed in a substantially C-shaped plate along the outer periphery of the bearing member 58a so as to grip the bearing member 58a.
The bearing holding portion 62b is configured similarly to the bearing holding portion 62a.

As shown in FIGS. 5 and 6, housing recesses 63a and 63b for housing bearing holding portions 62a and 62b are formed on the outer surface of housing 60. As shown in FIGS.
The housing recesses 63a and 63b are rectangular parallelepipeds, and the bearing holding portions 62a and 62b are positioned on side surfaces 63c of the housing recesses 63a and 63b near the center of the head-up display device 100 in the X direction.
A jig concave portion 63d is formed on a side wall of each of the accommodating concave portions 63a and 63b facing the side surface 63c in the X direction. The jig concave portion 63d is positioned facing the bearing holding portions 62a and 62b in the X direction, and a jig (not shown) used when press-fitting the bearing members 58a and 58b into the bearing holding portions 62a and 62b passes therethrough. formed for

As shown in FIG. 2 , the mirror unit 30 includes a concave mirror 31 that is an example of a reflecting mirror that reflects the display light L, and a concave mirror holder 35 that holds the concave mirror 31 .

The concave mirror 31 is formed in a substantially rectangular plate shape elongated in the X direction and curved along the X direction. The concave mirror 31 has a mirror surface 31a formed on the front side of the concave mirror 31 and reflecting light. The concave mirror 31 is formed by vapor-depositing a reflecting material made of metal such as aluminum on a base material made of synthetic resin having a concave curved surface. The concave mirror 31 magnifies and reflects the display light L reflected by the folding mirror member 20 toward the windshield 201 on the mirror surface 31a. Further, the concave mirror 31 is configured to be rotatable along with the concave mirror holder 35 about the rotation axis Ax extending in the direction perpendicular to the paper surface of FIG.

The concave mirror holder 35 is made of resin and holds the concave mirror 31 from its back surface. As shown in FIG. 4, the concave mirror holder 35 is rotatably supported within the housing 60 about the rotation axis Ax.
Specifically, as shown in FIG. 9, the concave mirror holder 35 includes a holder body portion 34, rotating shaft portions 35a and 35b, and a lever portion 38. As shown in FIG.
The holder main body 34 has a plate shape with a curved surface along the back surface of the concave mirror 31 . The rotating shafts 35a and 35b are positioned on the right side and the left side of the holder main body 34 and have a cylindrical shape extending along the rotating shaft Ax.

As shown in FIG. 13, the rotating shaft portion 35a has a protrusion 34c on the peripheral surface of the rotating shaft portion 35a. The projecting portion 34c is formed in a convex shape on the peripheral surface of the rotating shaft portion 35a. The projecting portion 34c has a substantially triangular pyramid shape. That is, the protrusion 34c is formed so that the height thereof decreases with respect to the peripheral surface toward the distal end of the rotation shaft 35a, and the height increases away from the center of the protrusion 34c in the circumferential direction of the rotation shaft 35a. It is formed so that the height becomes low on the basis of the peripheral surface. The rotating shaft portion 35b is also configured in the same manner as the rotating shaft portion 35a.

As shown in FIG. 9, the lever portion 38 is positioned at the center of the lower surface of the holder body portion 34 and extends downward. As shown in FIG. 10, the lever portion 38 receives an external force from a concave mirror drive unit 71, which will be described later. As a result, the concave mirror holder 35 rotates together with the concave mirror 31 about the rotation axis Ax.

As shown in FIG. 9, the pair of bearing members 58a and 58b have cylindrical shapes that are press-fitted into the rotating shaft portions 35a and 35b, respectively. , 35b and thus the concave mirror holder 35 are rotatably supported. The bearing members 58a and 58b have flange portions 58t extending radially outward of the bearing members 58a and 58b at one ends thereof.
The bearing members 58a and 58b are, for example, sliding bearings in which plate materials are wound in a cylindrical shape. This plate material consists of an electrogalvanized steel plate (SECC) with a thickness of 0.25 mm, a copper wire mesh as a reinforcing material placed on the back metal of the electrogalvanized steel plate, and polytetrafluoroethylene ( an overlay layer of PTFE). This plate material has a thickness of 0.75 mm, for example.
The bearing members 58a and 58b are not limited to sliding bearings, and may be ball bearings.

As shown in FIG. 13, a temporary fixing hole 58c, a rotation permitting hole 58d, a slit 58f and a gate portion 58e are formed in the bearing member 58a.
The temporary fixing hole 58c penetrates in the thickness direction of the bearing member 58a and forms a long rectangle in the circumferential direction of the bearing member 58a. The temporary fixing hole 58c is positioned next to the rotation allowing hole 58d along the rotation axis Ax, and is formed at a position closer to the holder body portion 34 than the rotation allowing hole 58d.
As shown in FIG. 12, in the process of attaching the bearing member 58a to the rotary shaft portion 35a, the protrusion 34c of the rotary shaft portion 35a is positioned in the temporary fixing hole 58c. Thereby, the bearing member 58a is temporarily fixed to the rotating shaft portion 35a.
The rotation-permitting hole 58d penetrates in the thickness direction of the bearing member 58a and forms a rectangle that is longer in the circumferential direction of the bearing member 58a than the temporary fixing hole 58c. The rotation allowance hole 58d is set to have a length corresponding to the rotation range of the concave mirror holder 35 in the circumferential direction. As shown in FIG. 13, when the bearing member 58a is attached to the rotating shaft portion 35a, the protrusion 34c of the rotating shaft portion 35a is positioned in the rotation permitting hole 58d. When the concave mirror holder 35 rotates, the protrusion 34c moves within the rotation permitting hole 58d. Thus, the bearing member 58a rotatably supports the rotating shaft portion 35a.

The gate portion 58e is formed between the temporary fixing hole 58c and the rotation allowing hole 58d so as to separate the temporary fixing hole 58c and the rotation allowing hole 58d, and includes a pair of rod-like portions extending in the circumferential direction of the bearing member 58a. A gap between the pair of rod-shaped portions is formed so that the protrusion 34c of the rotating shaft portion 35a can pass therethrough.
The slit 58f extends from the temporary fixing hole 58c to the end surface of the bearing member 58a near the holder main body 34 . The slit 58f is formed so that the protrusion 34c of the rotating shaft portion 35a can pass therethrough.
The bearing member 58b is constructed similarly to the bearing member 58a.

As shown in FIGS. 3 and 5, the bearing cover 90 is attached to the outer surface of the housing 60 so as to hide the bearing holding portions 62a and 62b from the outside. The bearing cover 90 includes a pair of cover portions 91a and 91b and a connection portion 92 that connects the cover portions 91a and 91b.
The pair of cover portions 91a and 91b are rectangular plates corresponding to the opening edges of the housing recesses 63a and 63b, respectively. The cover portion 91a closes the accommodation recess 63a, and the cover portion 91b closes the accommodation recess 63b. The cover portions 91a and 91b are fixed by screwing screws 98 (see FIG. 3) into cylindrical portions 99 (see FIG. 5) provided on the bottom surfaces of the housing recesses 63a and 63b.

The connecting portion 92 has a rectangular plate shape extending in the X direction between the cover portions 91a and 91b. The connecting portion 92 is fixed to the housing 60 by screwing a screw 98 between the pair of housing recesses 63 a and 63 b on the outer surface of the housing 60 .
Further, the connecting portion 92 includes a pair of elastic portions 93a and 93b at portions connected to the cover portions 91a and 91b. Each of the pair of elastic portions 93a and 93b has two S-shapes arranged along the Y direction. One end of the S shape of the elastic portions 93 a and 93 b is connected to the cover portions 91 a and 91 b , and the other end of the S shape is connected to the body portion of the connecting portion 92 . The elastic portions 93a and 93b are elastically deformed so as to allow the mutual positional relationship of the cover portions 91a and 91b to change. The elastic portions 93 a and 93 b facilitate mounting of the bearing cover 90 to the housing 60 regardless of shape errors of the bearing cover 90 or the housing 60 .

As shown in FIG. 10, the concave mirror driving unit 71 rotates the mirror unit 30 around the rotation axis Ax. The concave mirror drive unit 71 has a motor 72 and a conversion mechanism 73 .
The motor 72 is fixed inside the housing 60 and driven under the control of the controller 70 .
The conversion mechanism 73 is a mechanism that converts the rotary motion of the motor 72 into linear motion. Specifically, the conversion mechanism 73 includes a threaded shaft 73a having a threaded outer periphery, and a grasping portion 73b penetrated by the threaded shaft 73a.
The grip portion 73b includes a contact convex portion 73e with which the lever portion 38 contacts, and a clip portion 73d that pushes the lever portion 38 toward the contact convex portion 73e. The clip portion 73d is formed by bending a metal plate into a V shape. The tip of the clip portion 73d is positioned so as to face the clip portion 73d in the Z direction. The contact convex portion 73e has a hemispherical shape protruding toward the lever portion 38, and sandwiches the lever portion 38 together with the clip portion 73d.

The grasping portion 73b moves along the screw shaft 73a as the screw shaft 73a rotates as the motor 72 is driven. Thereby, the motor 72 and the conversion mechanism 73 rotate the concave mirror holder 35 around the rotation axis Ax via the lever portion 38 .

As shown in FIG. 2 , the control unit 70 includes a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), etc., and controls the display unit 10 and the motor 72 . The controller 70 rotates the mirror unit 30 by driving the motor 72 .

Next, a method for assembling the mirror unit 30 to the housing 60 will be described. This assembly work is performed, for example, by an operator.
First, as shown in FIG. 4, the rotating shaft portions 35a and 35b of the mirror unit 30 are inserted into the bearing holding portions 62a and 62b. At this time, the bearing members 58a and 58b are not attached to the rotating shaft portions 35a and 35b. Therefore, the rotating shaft portions 35a and 35b can be easily inserted into the bearing holding portions 62a and 62b.
Then, as shown in FIG. 7, the bearing member 58a is press-fitted into the bearing holding portion 62a so as to be inserted into the rotating shaft portion 35a. As described above, the bearing holding portion 62a is exposed to the outside. Therefore, the bearing member 58a can be press-fitted into the holding end portion 62c of the bearing holding portion 62b from the exposed end portion 62d of the bearing holding portion 62b. Similar to the bearing member 58a, the bearing member 58b is press-fitted into the bearing holding portion 62b so as to be inserted through the rotating shaft portion 35b. Thereby, the bearing members 58a and 58b rotatably support the rotary shaft portions 35a and 35b of the concave mirror holder 35 while being held in the bearing holding portions 62a and 62b.

Here, a more specific description will be given of how the bearing member 58a is press-fitted into the rotating shaft portion 35a. The operation of press-fitting the bearing member 58a into the rotating shaft portion 35a is performed by an operator using, for example, a jig (not shown) for pushing the bearing member 58a into the rotating shaft portion 35a.
First, as shown in FIG. 11, the bearing member 58a is brought closer to the tip of the rotating shaft portion 35a so that the slit 58f approaches the protrusion 34c. Then, when the bearing member 58a is pushed toward the rotating shaft portion 35a, as shown in FIG. 12, the projection portion 34c passes through the slit 58f and reaches the temporary fixing hole 58c. As a result, the bearing member 58a is temporarily fixed to the rotating shaft portion 35a. Further, when the bearing member 58a is pushed toward the rotating shaft portion 35a, the projection portion 34c passes through the gap of the gate portion 58e and reaches the inside of the rotation permitting hole 58d, as shown in FIG. At this time, the projecting portion 34c can move along the circumferential direction of the bearing member 58a within the rotation permitting hole 58d. Therefore, the bearing member 58a can rotatably support the rotating shaft portion 35a while being prevented from falling off from the rotating shaft portion 35a.
The press-fitting manner of the bearing member 58b into the rotation shaft portion 35b is the same.

(effect)
According to the first embodiment described above, the following effects are obtained.

(1) The head-up display device 100 includes a display unit 10 that emits display light L, a mirror unit 30 that reflects the display light L from the display unit 10 onto a windshield 201 that is an example of a projected member, and a mirror unit. 30, bearing members 58a and 58b that rotatably support the mirror unit 30, and a concave mirror driving unit 71 that is an example of a reflecting mirror driving unit that rotates the mirror unit 30 about the rotation axis Ax. , provided. The mirror unit 30 extends along a concave mirror 31 including a mirror surface 31a that reflects the display light L, a holder body 34 that holds the concave mirror 31, and a rotation axis Ax, and is rotatably supported by bearing members 58a and 58b. and a concave mirror holder 35, which is an example of a reflecting mirror holder having rotating shafts 35a and 35b. The housing 60 includes bearing holding portions 62a and 62b formed in concave shapes on the inner surface of the housing 60 so as to hold the bearing members 58a and 58b. The bearing holding portions 62a and 62b are located at the ends far from the holder main body portion 34 in the X direction along the rotation axis Ax, and are exposed to the outside of the housing 60 so that the bearing members 58a and 58b can be press-fitted. It has an end 62d.
According to this configuration, the bearing members 58a and 58b can be press-fitted into the bearing holding portions 62a and 62b from the outside of the housing 60. As shown in FIG. Therefore, assembly of the bearing members 58a and 58b to the housing 60 is facilitated.

(2) The bearing holding portions 62 a and 62 b are formed in a U-plate shape that opens toward the internal space of the housing 60 .
According to this configuration, the rotating shafts 35a and 35b are inserted into the bearing holding portions 62a and 62b from the internal space of the housing 60, and then the bearing members 58a and 58b are inserted by the rotating shafts 35a and 35b. are press-fitted into the bearing holding portions 62a and 62b. Therefore, it becomes easy to attach the mirror unit 30 to the housing 60 .

(3) Housing recesses 63a and 63b for housing the bearing holding portions 62a and 62b are formed on the outer surface of the housing 60. As shown in FIG.
According to this configuration, spaces for press-fitting the bearing members 58a and 58b into the bearing holding portions 62a and 62b are secured by the housing recesses 63a and 63b. Therefore, the operation of press-fitting the bearing members 58a and 58b is facilitated.

(4) A bearing cover 90 is attached to the outer surface of the housing 60 to cover the housing recesses 63a and 63b.
According to this configuration, the bearing members 58 a and 58 b are hidden by the bearing cover 90 . Therefore, for example, when the head-up display device 100 is assembled to the vehicle 200, foreign objects are prevented from coming into contact with the bearing members 58a and 58b. In addition, entry of dust, moisture, or the like into the housing 60 is suppressed.

(Second embodiment)
A second embodiment of a head-up display device according to the present invention will be described with reference to the drawings. The following description focuses on differences from the first embodiment.

As shown in FIG. 16, the bearing holding portion 62b has a convex portion 62b1 at its open end portion 62f. The convex portion 62b1 is positioned below the open end portion 62f and protrudes upward. The convex portion 62b1 is formed to define the inlet width W of the bearing holding portion 62b.

The rotating shaft portion 35b has a flat surface 35b1 on a part of the outer peripheral surface of the rotating shaft portion 35b. By forming the flat surface 35b1, the rotating shaft portion 35b has a minimum diameter φ1 and a maximum diameter φ2. The minimum diameter φ1 is the minimum diameter of the diameters of the rotating shaft portion 35b extending in the direction passing through the plane 35b1. The maximum diameter φ2 is the diameter of the rotating shaft portion 35b extending in a direction not passing through the plane 35b1, and matches the diameter of the rotating shaft portion 35b when the plane 35b1 is not formed. The maximum diameter φ2 is set larger than the inlet width W, and the minimum diameter φ1 is set smaller than the inlet width W. Therefore, the rotating shaft portion 35b can be inserted into the bearing holding portion 62b so that the minimum diameter φ1 is in the same direction as the inlet width W.
Note that not only the bearing holding portion 62b and the rotating shaft portion 35b but also the bearing holding portion 62a and the rotating shaft portion 35a have convex portions 62a1 and flat surfaces 35a1 similarly to the bearing holding portion 62b and the rotating shaft portion 35b.

As shown in FIG. 14, the rotating shafts 35a and 35b are brought closer to the bearing holding portions 62a and 62b in a direction in which the minimum diameter φ1 is in the same direction as the inlet width W. As shown in FIG. As a result, as shown in FIG. 17, the rotary shafts 35a and 35b enter the bearing holding portions 62a and 62b. At this time, as shown in FIGS. 15 and 18, the lever portion 38 approaches and enters the gap between the clip portion 73d and the contact protrusion 73e. 19 and 20, when the rotating shafts 35a and 35b reach the holding end portions 62c of the bearing holding portions 62a and 62b, the lever portion 38 is held between the clip portion 73d and the contact projection portion 73e. be done. The bearing members 58a and 58b are attached to the rotating shaft portions 35a and 35b in the same manner as in the first embodiment.

(effect)
According to the second embodiment described above, the following effects are obtained.

(1) The bearing holding portions 62a and 62b are provided with a convex portion 62b1 positioned at an opening end portion 62f on the opening side of the bearing holding portions 62a and 62b and defining an inlet width W of the bearing holding portions 62a and 62b. The rotary shaft portions 35a and 35b extend in a direction different from the maximum diameter φ2, which is an example of a first diameter larger than the inlet width W of the bearing holding portions 62a and 62b, and the maximum diameter φ2. It is formed to have a minimum diameter φ1, which is an example of a second diameter smaller than the inlet width W. The concave mirror holder 35 has a lever portion 38 . The concave mirror driving unit 71 has a gripping portion 73b that grips the lever portion 38. As shown in FIG. The lever portion 38 is formed so as to be gripped by the grip portion 73b when the rotating shaft portions 35a and 35b are inserted into the bearing holding portions 62a and 62b with the minimum diameter φ1 along the inlet width W.
According to this configuration, the posture of the concave mirror holder 35 when inserting the rotating shaft portions 35a and 35b into the bearing holding portions 62a and 62b is defined. As a result, when the rotation shafts 35a and 35b are completely inserted into the bearing holding portions 62a and 62b, the lever portion 38 of the concave mirror holder 35 is naturally held by the holding portion 73b. Therefore, the mirror unit 30 can be assembled to the housing 60 more easily.
The convex portion 62a1 can also prevent the bearing members 58a and 58b attached to the bearing holding portions 62a and 62b from protruding from the open end portion 62f.

In addition, this invention is not limited by the above embodiment and drawing. Modifications (including deletion of components) can be made as appropriate without changing the gist of the present invention. An example of modification will be described below.

(Modification)
In each of the above embodiments, the bearing members 58a and 58b are attached to the pair of rotating shafts 35a and 35b of the concave mirror holder 35, respectively, but one of the bearing members 58a and 58b may be omitted. For example, when the bearing member 58b is omitted, the rotating shaft portion 35b may be directly supported by the bearing holding portion 62b. In this case, the bearing holding portion 62b may be formed so as not to be exposed to the outside. Furthermore, in this case, the cover portion 91b of the bearing cover 90 may be omitted.

In each of the above embodiments, the bearing members 58a and 58b are formed with the temporary fixing hole 58c, the rotation permitting hole 58d, the slit 58f and the gate portion 58e. Only the hole 58c and the gate portion 58e may be omitted.

Further, the connecting portion 92 of the bearing cover 90 in each of the above embodiments may be omitted. In this case, the pair of cover portions 91a and 91b are configured separately.

The configuration of the head-up display device 100 in each of the above embodiments can be changed as appropriate. For example, the mirror unit 30 may be directly irradiated with the display light L from the display unit 10 by omitting the folding mirror member 20 . Also, the head-up display device 100 may include a plane mirror instead of the concave mirror 31 .

In each of the above-described embodiments, the elastic portions 93a and 93b are formed in two S-shapes arranged in the Y direction. There may be.

The accommodation recesses 63a and 63b in each of the above embodiments can be omitted. In this case, the bearing holding portions 62 a and 62 b may protrude from the outer surface of the housing 60 . In this case, the cover portions 91a and 91b may be formed in a box shape surrounding the bearing holding portions 62a and 62b.

Although the head-up display device 100 is mounted on the vehicle 200 in the above embodiment, it may be mounted on a vehicle other than the vehicle 200, such as an airplane or a ship. Further, the projection member is not limited to the windshield, and may be a dedicated combiner.

In the above-described embodiment, the rotation shaft portion 35b has the minimum diameter φ1 and the maximum diameter φ2 by forming the flat surface 35b1 on the rotation shaft portion 35b. However, the rotating shaft portion 35b may have a minimum diameter φ1 and a maximum diameter φ2 by forming the rotating shaft portion 35b in an elliptical cylindrical shape.

In the second embodiment, the bearing holding portions 62a and 62b are formed so as to be entirely exposed to the outside of the housing 60, but only the exposed end portion 62d of the bearing holding portions 62a and 62b is The bearing members 58a and 58b may be exposed to the outside so as to be press-fitted, and the portions other than the exposed end portion 62d may be hidden from the outside. Alternatively, the entire bearing holding portions 62 a and 62 b may be formed so as not to be exposed to the outside of the housing 60 .

The head-up display device 100 of the above embodiment can also solve problems from other viewpoints. This issue will be explained. Conventionally, when assembling a mirror unit inside a housing, it has been necessary to adjust the direction of the mirror unit so that the lever portion of the reflector holder is gripped by the grip portion of the reflector drive unit. In particular, it was difficult to see the positions of the lever and the grip due to the mirror surface, and it was difficult to correctly insert the lever into the grip under these circumstances.
Supplementary notes 1 and 2 below are made in view of the above-mentioned actual situation, and their object is to provide a head-up display device that facilitates the correct assembly of the mirror unit to the housing.
This problem can be solved, for example, by Supplements 1 and 2 below.

(Appendix 1)
a display unit that emits display light;
a mirror unit that reflects the display light from the display unit toward a projected member;
a housing that houses the mirror unit;
a bearing member that rotatably supports the mirror unit,
The mirror unit is
a reflecting mirror including a mirror surface that reflects the display light;
a holder main body that holds the reflecting mirror; and a reflecting mirror holder that extends along the rotating shaft and has a rotating shaft portion that is rotatably supported by the bearing member,
The bearing holding portion has a convex portion positioned at an opening side end portion of the bearing holding portion and defining an inlet width of the bearing holding portion,
The rotating shaft portion has a first diameter larger than the inlet width of the bearing holding portion and a second diameter extending in a direction different from the first diameter and smaller than the inlet width of the bearing holding portion. formed to have
Head-up display device.

(Appendix 2)
The head-up display device includes a reflecting mirror driving unit that rotates the mirror unit around the rotation axis,
The reflector holder has a lever portion,
The reflecting mirror drive unit includes a gripping portion that grips the lever portion,
The lever portion is formed so as to be gripped by the grip portion when the rotating shaft portion is inserted into the bearing holding portion with the second diameter along the inlet width.
The head-up display device according to appendix 1.

10 display unit 30 mirror unit 31 concave mirror 31a mirror surface 34 holder body 35 concave mirror holders 35a, 35b rotating shafts 35a1, 35b1 plane 38 lever 40 mirror driving units 58a, 58b bearing member 60 housings 62a, 62b bearing holding portion 62a1, 62b1 Convex portion 62c Grip end portions 63a, 63b Accommodating recess 71 Concave mirror drive unit 72 Motor 73b Grip portion 90 Bearing cover 100 Head-up display device 200 Vehicle 201 Windshield φ1 Minimum diameter φ2 Maximum diameter L Display light V Virtual image W Entrance width Ax Rotation shaft

Claims (5)

a display unit that emits display light;
a mirror unit having a rotating shaft portion and reflecting the display light from the display portion toward a projected member;
a housing having an accommodating portion that accommodates the mirror unit;
a bearing member that is configured separately from the housing and receives the rotating shaft ,
The housing has a through hole penetrating the inside and outside of the housing,
The mirror unit is accommodated in the accommodating portion such that the rotating shaft portion is inserted into the through hole from the inside of the accommodating portion,
The bearing member is assembled to the through hole from the outside of the accommodating portion so as to bear the rotating shaft portion while the mirror unit is accommodated in the accommodating portion,
When the bearing member is assembled in the through hole, the bearing member is interposed between the inner surface of the through hole and the rotating shaft portion, and the rotating shaft portion does not contact the inner surface of the through hole.
Head-up display device. The bearing member is press-fitted into the through hole from the outside of the accommodating portion in a state in which the mirror unit is accommodated in the accommodating portion.
The head-up display device according to claim 1. The bearing member is a cylindrical slide bearing,
The head-up display device according to claim 2. The bearing member comprises a steel plate, a wire mesh arranged on the steel plate, and an overlay layer covering the wire mesh.
The head-up display device according to claim 3. the housing has a groove connected to the through hole formed in an inner surface of the accommodating portion facing the rear surface of the mirror unit;
the groove portion is positioned at an end portion of the housing that opens toward the accommodating portion and includes a convex portion that defines an inlet width of the groove portion ;
The rotating shaft is formed to have a first diameter that is larger than the inlet width of the groove and a second diameter that extends in a direction different from the first diameter and is smaller than the inlet width of the groove. to be
A head-up display device according to any one of claims 1 to 4 .

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