Head-up display device

Abstract

The purpose of the present invention is to provide a head-up display device that enables a reduction in noise occurring when a mirror is rotated.　This head-up display device comprises: a display that emits display light representing an image; a mirror body part that reflects the display light; a lever part (6) that has a shaft section and a rotational force receiving section (62) and is provided at an end of the mirror body part; a shaft support part (75) that supports the shaft section rotatably about a rotation axis AX; a mirror rotation mechanism that rotates the mirror body part together with the lever part (6) about the rotation axis AX by transmitting rotational force to the rotational force receiving section (62) of the lever part (6); a clamping member (80) that holds the shaft section and the shaft support part (75) in a direction along the rotation axis AX while making the shaft section rotatable with respect to the shaft support part (75); and a low-friction member (90) that comprises a material having a smaller friction coefficient than the clamping member (80), is put between the clamping member (80) and the shaft support part (75), and slides with respect to the shaft support part (75) when the lever part (6) and the mirror body part are rotated.

Description

Technical Field

[0001] The present disclosure relates to a head-up display device.

Background Art

[0002] For example, the head-up display device described in Patent Document 1 includes a display that emits display light representing an image, a reflection unit that reflects the display light, a supported unit provided at an end of the reflection unit and having a cylindrical shaft portion, a support unit through which the shaft portion is inserted and that supports the supported unit so as to be rotatable about the shaft portion, and an elastic member having a substantially U-shaped cross section and sandwiching the supported unit and the support unit by the inner surface of the substantially U-shaped cross section.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the configuration described in Patent Document 1 above, when the reflection unit is rotated, noise may occur due to the elastic member sliding with respect to the support unit.

[0005] The present disclosure has been made in view of the above actual situation, and an object thereof is to provide a head-up display device capable of reducing noise generated during rotation of a mirror.

Means for Solving the Problems

[0006] To achieve the above objective, the head-up display device according to the present disclosure comprises: a display unit that emits display light representing an image; a mirror body that reflects the display light; a lever portion having a shaft portion and a rotational force receiving portion, provided at the end of the mirror body portion; a shaft support portion that supports the shaft portion so as to be rotatable about a rotation axis; a mirror rotation mechanism that rotates the mirror body portion together with the lever portion about the rotation axis by transmitting rotational force to the rotational force receiving portion of the lever portion; a holding member that holds the shaft portion and the shaft support portion in a direction along the rotation axis while allowing the shaft portion to rotate relative to the shaft support portion; and a low-friction member made of a material with a lower coefficient of friction than the holding member, sandwiched between the holding member and the shaft support portion or the lever portion, and sliding against the shaft support portion or the lever portion when the lever portion and the mirror body portion rotate. [Effects of the Invention]

[0007] According to this disclosure, the noise generated when the mirror rotates can be reduced in a head-up display device. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram of a head-up display device according to one embodiment of the present disclosure. [Figure 2] This is a perspective view of a mirror unit and mirror rotation mechanism according to one embodiment of the present disclosure. [Figure 3] This is an exploded perspective view of a mirror unit and mirror rotation mechanism according to one embodiment of the present disclosure. [Figure 4] This is an exploded perspective view of the lever portion and support case according to one embodiment of the present disclosure. [Figure 5] This is a perspective view of a lever portion, support case, clamping member, and low-friction member according to one embodiment of the present disclosure. [Figure 6] This is a perspective view of the area around a shaft support portion to which a low-friction member is attached according to one embodiment of the present disclosure. [Figure 7]This is a perspective view of the area around a shaft support portion in which a low-friction member according to one embodiment of the present disclosure is being installed. [Figure 8] This is a perspective view of a shaft support portion to which a clamping member and a low-friction member are attached according to one embodiment of the present disclosure. [Figure 9] This is a perspective view of a lever portion, support case, and clamping member according to one embodiment of the present disclosure. [Figure 10] This is a plan view of a low-friction member according to one embodiment of the present disclosure. [Figure 11] This is a perspective view of the area around a shaft support portion to which a low-friction member according to a modified example of the present disclosure is attached. [Figure 12] This is a partial cross-sectional view of a modified example of the present disclosure, showing a low-friction member and a shaft support portion. [Figure 13] This is a schematic cross-sectional view of a modified example of the shaft, shaft support, retaining member, and low-friction member according to the present disclosure. [Modes for carrying out the invention]

[0009] One embodiment of the head-up display device relating to this disclosure will be described with reference to the drawings. The head-up display device 100 is mounted, for example, on the dashboard of a car. As shown in Figure 1, the head-up display device 100 comprises a housing 1, a display unit 2, a flat mirror 3, a mirror unit 4 having a lever portion 6 as shown in Figure 3, a mirror rotation mechanism 5 having a support case 7, a clamping member 80, a support member 9a, a holding member 9b, and a low-friction member 90 as shown in Figure 5.

[0010] As shown in Figure 1, the head-up display device 100 reflects the display light L, which represents an image containing various vehicle information emitted from the display unit 2, using the flat mirror 3 and the mirror unit 4, and projects it onto the vehicle's windshield 200, displaying a virtual image corresponding to this image.

[0011] The housing 1 is formed of, for example, a light-shielding resin or the like and has a box shape. Inside the housing 1, a display 2, a flat mirror 3, a mirror unit 4, a mirror rotation mechanism 5, and the like are accommodated. An opening 10 for allowing display light L to pass through toward the front glass 200 is formed in a portion of the housing 1 facing the front glass 200. The opening 10 is covered with a light-transmissive cover 11.

[0012] The display 2 emits display light L representing an image including various vehicle information. The display 2 may be a transmissive liquid crystal display composed of a liquid crystal panel and a backlight device, or may be a self-emitting display.

[0013] The flat mirror 3 reflects the display light L emitted by the display 2 toward the mirror unit 4. Note that the flat mirror 3 may be a concave mirror.

[0014] The mirror unit 4 is supported so as to be rotatable about a rotation axis AX, and reflects the display light L from the flat mirror 3 toward the front glass 200. The mirror rotation mechanism 5 rotates the mirror unit 4 about the rotation axis AX. The specific configurations of the mirror unit 4 and the mirror rotation mechanism 5 will be described later.

[0015] The display light L reflected by the mirror unit 4 passes through the light-transmissive cover 11 provided in the opening 10 of the housing 1 and travels toward the front glass 200. The display light L is reflected by the front glass 200 and travels toward the viewer E. Thereby, a virtual image is displayed so as to be visible to the viewer E at a position F in front of the front glass 200.

[0016] As shown in FIGS. 2 and 3, the mirror unit 4 includes a mirror main body portion 40, a lever portion 6, and a shaft portion 8. The mirror body 40 reflects the display light L from the flat mirror 3 toward the windshield 200. The mirror body 40 consists of a concave mirror formed by a reflective film on the surface of a substrate made of, for example, a synthetic resin material, by means of vapor deposition or other means. The mirror body 40 has a reflective surface 40a that is concavely curved in the X direction (longitudinal direction) and the Y direction (short direction).

[0017] The shaft portion 8 is located at one end of the mirror body portion 40 in the X direction (the right end in Figure 3) and is cylindrical in shape, extending along the rotation axis AX. The rotation axis AX extends along the X direction and the width direction of the vehicle and is located at the center of the reflective surface 40a in the Y direction. The shaft portion 8 is supported by the support member 9a so as to be rotatable about the rotation axis AX. The retaining member 9b is made of a metal fitting such as aluminum, with a roughly U-shaped cross-section. The retaining member 9b rotatably holds the shaft portion 8 relative to the support member 9a.

[0018] The lever portion 6 is formed from, for example, a resin to which glass fibers have been added, and is rotatably supported in the support case 7 around the rotation axis AX. The lever portion 6 is formed separately from the mirror body portion 40 and is attached to the mounting portion 40b at the other end of the mirror body portion 40 in the X direction (the left end in Figure 3). The lever portion 6 is provided on the reflective surface 40a side of the mirror body portion 40.

[0019] More specifically, as shown in Figure 4, the lever portion 6 comprises a shaft portion 61, a rotational force receiving portion 62, a lever body portion 63, and a mounting portion 64. The mounting portion 64 is plate-shaped and extends along the Y direction, and is attached to the mounting portion 40b (see Figure 3) of the mirror body portion 40.

[0020] The lever body 63 is roughly rectangular in shape and extends in a direction perpendicular to the rotation axis AX. The shaft portion 61 is located on the outer surface of the lever body portion 63 in the X direction and is situated on the rotation axis AX. The shaft portion 61 has a substantially hemispherical shape with its apex facing outward in the X direction. The shaft portion 61 comprises a plurality of side portions 61a, 61b, 61c arranged at equal angular intervals around the rotation axis AX.

[0021] As shown in Figures 3 and 4, the rotational force receiving portion 62 is formed as a rack gear with teeth aligned in the Y direction that mesh with the gear 72 of the mirror rotation mechanism 5, which will be described later. The rotational force receiving portion 62 is located on the end face of the mirror body portion 40 on the reflected light emission side of the lever body portion 63.

[0022] As shown in Figure 7, the lever portion 6 is equipped with a locking portion 65. The locking portion 65 is provided in a convex shape on the back side of the shaft portion 61 (see Figure 4). As shown in Figure 9, the locking portion 65 fits into the through hole 82b of the clamping member 80. This allows the lever portion 6 and the clamping member 80 to rotate integrally. The locking portion 65 is formed in a rectangular convex shape with an inclined surface whose height increases along the insertion direction J1 of the clamping member 80.

[0023] As shown in Figures 2 and 3, the mirror rotation mechanism 5, under the control of a control unit (not shown), rotates the mirror unit 4 around the rotation axis AX, thereby adjusting the position in which the display light L reflected by the mirror unit 4 is projected onto the windshield 200 (see Figure 1). More specifically, the mirror rotation mechanism 5 comprises a motor 71, a gear 72, a screw gear 71a, and a support case 7. The helical gear 71a extends along the Y direction, is connected to the output shaft of the motor 71, and meshes with the gear 72. The gear 72 is a spur gear that is rotatably supported around a rotation axis that extends along the X direction. The gear 72 meshes with the helical gear 71a and the rotational force receiving portion 62 of the lever portion 6. The motor 71 rotates the screw gear 71a under the control of a control unit (not shown). The rotational force of the screw gear 71a is transmitted to the rotational force receiving unit 62 via the gear 72. The lever unit 6 rotates together with the mirror body unit 40 around the rotation axis AX based on the force transmitted to the rotational force receiving unit 62.

[0024] The support case 7 supports the motor 71, gear 72, and screw gear 71a, and is installed inside the housing 1 (see Figure 1). The support case 7 is made of resin with added glass fibers. As shown in Figures 3 and 4, the support case 7 comprises a shaft support portion 75 and a gear housing portion 76. The gear housing section 76 houses the screw gear 71a and the gear 72.

[0025] As shown in Figure 4, the shaft support portion 75 supports the shaft portion 61 of the lever portion 6 so that it can rotate around the rotation axis AX. The shaft support portion 75 comprises a peripheral wall portion 75s, a ceiling portion 75t, a contact portion 75j, and a locking portion 75a. The peripheral wall portion 75s is cylindrical in shape and surrounds the shaft portion 61. The ceiling portion 75t is formed to close the end of the peripheral wall portion 75s and is dome-shaped, following the spherical surface of the shaft portion 61. The locking portion 75a is formed as a convex shape in the center of the outer surface of the ceiling portion 75t. As shown in Figure 6, the locking portion 75a has a substantially cylindrical shape with its tip surface inclined so that its height increases along the insertion direction J1 of the clamping member 80. The contact portion 75j is formed on the outer surface of the ceiling portion 75t in a ring-shaped convex form that surrounds the locking portion 75a. The contact portion 75j sandwiches the low-friction member 90 between itself and the clamping member 80. The contact portion 75j has a semicircular cross-section that bulges towards the low-friction member 90.

[0026] As shown in Figures 4 and 5, the clamping member 80 clamps the shaft portion 61 and the shaft support portion 75 from the outside in the X direction and rotates with the support case 7 together with the lever portion 6. The clamping member 80 is formed in an elastically deformable U-shaped plate and is a metal fitting made of, for example, aluminum. As shown in Figure 8, the clamping member 80 has two wall portions 81 and 82 facing each other. When the clamping member 80 is installed, the two wall portions 81 and 82 are aligned along the rotation axis AX and extend in a direction perpendicular to the rotation axis AX. Wall portion 81 has a pressing portion 81a that pushes the sliding portion 91 (see Figure 6), which will be described later, of the low friction member 90 toward the contact portion 75j of the shaft support portion 75. The pressing portion 81a is dome-shaped, and a through hole 81b is formed in the center of the pressing portion 81a. The locking portion 75a of the shaft support portion 75 passes through the through hole 81b.

[0027] As shown in Figure 9, the wall portion 82 is positioned around the locking portion 65 of the lever portion 6, and pushes the adhesive portion 92 (see Figure 7), which will be described later, of the low-friction member 90 toward this periphery. A through hole 82b is formed in the wall portion 82. The locking portion 65 fits into the through hole 82b. The through hole 82b is rectangular in shape, corresponding to the locking portion 65. When the locking portion 65 fits into the through hole 82b, the clamping member 80 rotates together with the lever portion 6 around the rotation axis AX. At this time, the clamping member 80 and the low-friction member 90 rotate relative to the shaft support portion 75.

[0028] As shown in Figure 8, the wall portions 81 and 82 have inclined portions 81k and 82k that are angled away from each other on their respective tip sides. The inclined portions 81k and 82k are each semi-circular in shape. The inclined portions 81k and 82k facilitate the attachment of the clamping member 80 to the shaft portion 61 and the shaft support portion 75.

[0029] As shown in Figures 6 and 8, the low-friction member 90 is provided along the inner surface of the clamping member 80 and is sandwiched between the clamping member 80 and the shaft portion 61 and shaft support portion 75. The low-friction member 90 reduces the frictional force generated between the clamping member 80 and the shaft portion 61 and shaft support portion 75. The low-friction member 90 is made of a sliding material having a lower coefficient of friction than the clamping member 80 and the support case 7, for example, nylon, preferably PA6 (6 nylon). The coefficient of friction of the low-friction member 90 is, for example, 0.16 to 0.25, and the coefficient of friction of the support case 7 is, for example, 0.35. The coefficient of friction of the clamping member 80 (aluminum) is, for example, 0.82. The low-friction member 90 is formed in the shape of a flexible sheet.

[0030] More specifically, as shown in Figure 10, the low-friction member 90 comprises a sliding portion 91, an adhesive portion 92, and a connecting portion 93. The sliding portion 91 is formed in the shape of an annular sheet. A through hole 91a (see Figure 6) is formed in the center of the sliding portion 91 through which the locking portion 75a passes. The sliding portion 91 is sandwiched between the contact portion 75j (see Figure 6) of the shaft support portion 75 and the pressing portion 81a (see Figure 8) of the clamping member 80. The sliding portion 91 rotates together with the clamping member 80 around the rotation axis AX and slides against the contact portion 75j.

[0031] As shown in Figure 7, the adhesive portion 92 is formed in the shape of a rectangular frame. The length of each side of the adhesive portion 92 is greater than the diameter of the sliding portion 91. The adhesive portion 92 has a through hole 92a through which the locking portion 65 of the lever portion 6 passes. The through hole 92a is rectangular in shape. The adhesive portion 92 is bonded around the locking portion 65 of the lever portion 6 by adhesive means such as double-sided tape (not shown). The connecting portion 93 connects the sliding portion 91 and the adhesive portion 92. The connecting portion 93 is rectangular in shape and has a width smaller than the diameter of the sliding portion 91.

[0032] Next, the assembly process for the lever portion 6, support case 7, clamping member 80, and low-friction member 90 will be described. This process is performed, for example, by a person. First, as shown in Figure 4, the shaft portion 61 of the lever portion 6 is inserted into the shaft support portion 75 of the support case 7 from a direction along the rotation axis AX. Next, as shown in Figure 7, the adhesive portion 92 of the low-friction member 90 is bonded to the area around the locking portion 65 of the lever portion 6 using adhesive means such as double-sided tape (not shown). Then, as shown in Figure 6, by bringing the sliding portion 91 closer to the locking portion 75a, the connecting portion 93 of the low-friction member 90 is bent, allowing the through hole 91a of the sliding portion 91 to pass through the locking portion 75a of the shaft support portion 75. As a result, the locking portion 75a is pressed into the through hole 91a of the sliding portion 91, and the sliding portion 91 is temporarily fixed on the contact portion 75j.

[0033] Next, the clamping member 80 is inserted to the outside of the shaft portion 61 and the shaft support portion 75 along the insertion direction J1 perpendicular to the rotation axis AX. At this time, as shown in Figures 8 and 9, the wall portions 81 and 82 elastically deform to separate from each other along the inclined surfaces of the locking portions 65 and 75a. Once the insertion of the clamping member 80 is complete, the locking portion 75a fits into the through hole 81b of the wall portion 81, and the locking portion 65 fits into the through hole 82b of the wall portion 82. This completes the mounting of the clamping member 80. In this state, the pressing portion 81a of the wall portion 81 presses the sliding portion 91 of the low-friction member 90 toward the contact portion 75j of the shaft support portion 75.

[0034] When the mirror rotation mechanism 5 rotates the mirror unit 4 around the rotation axis AX, the clamping member 80 and the low-friction member 90 rotate together with the lever portion 6 around the rotation axis AX relative to the shaft support portion 75. At this time, the sliding portion 91 of the low-friction member 90 rotates around the rotation axis AX so as to slide against the contact portion 75j. In this process, the low-friction member 90 reduces the frictional force acting between the clamping member 80 and the shaft support portion 75.

[0035] (effect) According to the embodiment described above, the following effects are achieved. (1) The head-up display device 100 comprises a display unit 2 that emits display light L representing an image, a mirror body 40 that reflects the display light L, a lever 6 having a shaft 61 and a rotational force receiving part 62 and provided at the end of the mirror body 40, a shaft support part 75 that supports the shaft 61 so that it can rotate around the rotation axis AX, a mirror rotation mechanism 5 that rotates the mirror body 40 together with the lever 6 around the rotation axis AX by transmitting rotational force to the rotational force receiving part 62 of the lever 6, a clamping member 80 which is an example of a holding member that allows the shaft 61 to rotate relative to the shaft support part 75 and holds the shaft 61 and the shaft support part 75 in a direction along the rotation axis AX, and a low-friction member 90 made of a material with a lower coefficient of friction than the clamping member 80, which is sandwiched between the clamping member 80 and the shaft support part 75 and slides against the shaft support part 75 when the lever 6 and the mirror body 40 rotate. The clamping member 80 clamps the shaft portion 61 and the shaft support portion 75 from the outside in a direction along the rotation axis AX, and rotates together with the lever portion 6. The low-friction member 90 slides against the shaft support portion 75 when it rotates together with the clamping member 80. With this configuration, the low-friction member 90 reduces the frictional force acting between the clamping member 80 and the shaft support portion 75, thereby reducing the noise generated when the mirror body portion 40 rotates. In particular, the lever portion 6 receives rotational force from the mirror rotation mechanism 5 via the rotational force receiving portion 62. As a result, the frictional force acting between the clamping member 80 and the shaft support portion 75 tends to be large, and noise is likely to be generated, so it is beneficial to provide a low-friction member 90.

[0036] (2) The low-friction member 90 includes a sliding portion 91 which is sandwiched between the clamping member 80 and the shaft support portion 75, an adhesive portion 92 which is sandwiched between the clamping member 80 and the lever portion 6 and adhered to the lever portion 6, and a connecting portion 93 which connects the sliding portion 91 and the adhesive portion 92. With this configuration, the adhesive portion 92 is bonded to the lever portion 6, which prevents the low-friction member 90 from falling off when the clamping member 80 is attached. Therefore, it becomes easier to attach the clamping member 80 with the low-friction member 90 interposed.

[0037] (3) The low-friction member 90 is sandwiched between the clamping member 80 and the shaft support portion 75 and includes a sliding portion 91 that forms an annular sheet. The shaft support portion 75 includes a locking portion 75a that is formed in a convex shape so as to be inserted into a through hole 91a, which is an example of a first through hole formed in the low-friction member 90, and a through hole 81b, which is an example of a second through hole formed in the clamping member 80. With this configuration, the locking portion 75a can be used to position the low-friction member 90 and the clamping member 80. (4) The lever portion 6 is made of a resin to which glass fibers have been added. As a comparative example, in a configuration without the low-friction member 90, the clamping member 80 comes into contact with the glass fibers contained in the lever portion 6, causing noise. However, by providing the low-friction member 90, contact between the clamping member 80 and the glass fibers is suppressed, thereby reducing noise.

[0038] This disclosure is not limited to the embodiments and drawings described above. Modifications (including the deletion of components) can be made as appropriate, provided they do not alter the essence of this disclosure. An example of such a modification is described below.

[0039] (modified version) The shape of the low-friction member 90 in the above embodiment can be changed. For example, the adhesive portion 92 and the connecting portion 93 of the low-friction member 90 may be omitted, and the low-friction member 90 may consist only of the sliding portion 91. For example, as shown in Figure 11, the low-friction member 190 may be formed in the shape of an annular sheet and have a cut portion 191 on a part of its outer circumferential surface that is straight. The locking portion 75a is inserted (press-fitted) into the through hole 191a of the low-friction member 190. At this time, the cut portion 191 faces the insertion direction J1 of the clamping member 80, so that the clamping member 80 does not come into contact with the low-friction member 190 when the clamping member 80 is inserted. This prevents the clamping member 80 from flicking the low-friction member 190 away from the locking portion 75a when the clamping member 80 is inserted. In this modified example, adhesive means such as double-sided tape (not shown) do not need to be used. Furthermore, in this modified example, as shown in Figure 12, it is preferable that the center of the straight line of the cut portion 191 is located on the contact portion 75j and at the apex of the contact portion 75j.

[0040] In the above embodiment, the clamping member 80 was in the shape of a substantially U-shaped plate that clamped the shaft portion 61 and the shaft support portion 75 from the outside. However, the clamping member 80 is not the only option; a holding member that can hold the shaft portion 61 from a direction along the rotation axis AX while allowing it to rotate relative to the shaft support portion 75 is also possible. For example, as shown in Figure 13, the holding member 180 comprises a cylindrical pin 183 that passes over the rotation axis AX, and a push nut 182, which is an example of a pressing member that is inserted through the pin 183 and holds the shaft portion 61 and the shaft support portion 75 in a direction along the rotation axis AX. The pin 183 penetrates the central axis of the shaft portion 61. The first end of the pin 183 (upper end in Figure 13) is fitted into the inner surface of the ceiling portion 75t of the shaft support portion 75. The second end of the pin 183 (lower end in Figure 13) is exposed on the back side of the shaft portion 61. An annular push nut 182 is screwed onto the second end of the pin 183. An annular sheet-shaped low-friction member 290 is provided between the push nut 182 and the back surface of the shaft portion 61. The low-friction member 290 reduces the frictional force between the push nut 182 of the retaining member 180 and the back surface of the shaft portion 61. Furthermore, not limited to the modified form shown in Figure 13, the first end of the pin 183 (the upper end in Figure 13) may pass through the ceiling portion 75t of the shaft support portion 75, a push nut 182 may be screwed onto this first end, and a low-friction member 290 may be provided between the push nut 182 and the ceiling portion 75t.

[0041] In the above embodiment, the lever portion 6 was formed separately from the mirror body portion 40, but it is not limited to this and may be formed integrally with the mirror body portion 40.

[0042] In the above embodiment, the head-up display device 100 was mounted in a vehicle, but it is not limited to this and may be mounted in other vehicles such as airplanes or ships. Furthermore, the projection target is not limited to the windshield 200, but may be a dedicated combiner. [Explanation of Symbols]

[0043] 1 Housing 2 Display 3 Flat mirror 4 Mirror unit 5 Mirror rotation mechanism 6 Lever part 7 Support case 8, 61 Shaft part 9a Support member 9b, 180 Holding member 10 Opening 11 Translucent cover 40 Mirror body part 40a Reflective surface 40b Mounted parts 61a, 61b, 61c One side 62 Rotation force receiving part 63 Lever body part 64 Mounting parts 65, 75a Locking part 71 Motor 71a Screw gear 72 Gear 75 Shaft support part 75j Contact part 75s Peripheral wall part 75t Ceiling part 76 Gear housing part 80 Clamping members 81, 82 Wall part 81a Pressing parts 81b, 82b, 91a, 92a, 191a Through hole 81k, 82k Inclined parts 90, 190, 290 Low friction member 91 Sliding part 92 Adhesive part 93, connecting part 100, head-up display device 182, push nut 183, pin 191, cut part 200, windshield E, viewer F, forward position J1, insertion direction L, display light AX, rotation axis

Claims

1. A display unit that emits display light representing an image, The mirror body that reflects the aforementioned display light, Having a shaft portion and a rotational force receiving portion, and a lever portion provided at the end of the mirror body portion, A shaft support portion that supports the aforementioned shaft portion so that it can rotate around the rotation axis, A mirror rotation mechanism that transmits rotational force to the rotational force receiving part of the lever part, thereby rotating the mirror body together with the lever part around the rotation axis, A holding member that allows the shaft portion to rotate relative to the shaft support portion, and holds the shaft portion and the shaft support portion in a direction along the axis of rotation, The low-friction member is made of a material with a lower coefficient of friction than the retaining member, is sandwiched between the retaining member and the shaft support portion or the lever portion, and slides against the shaft support portion or the lever portion when the lever portion and the mirror body portion rotate. Head-up display device.

2. The holding member is a clamping member that grips the shaft portion and the shaft support portion from the outside in a direction along the rotation axis and rotates together with the lever portion. The low-friction member slides against the shaft support when it rotates together with the lever portion and the clamping member. The head-up display device according to claim 1.

3. The low-friction member is A sliding portion is sandwiched between the clamping member and the shaft support portion, An adhesive portion is sandwiched between the clamping member and the lever portion and adhered to the lever portion, A connecting portion that connects the sliding portion and the adhesive portion is provided. The head-up display device according to claim 2.

4. The low-friction member is sandwiched between the clamping member and the shaft support portion, and is in the shape of an annular sheet. The shaft support portion includes a locking portion that is formed in a convex shape so as to be inserted into a first through hole formed in the low friction member and a second through hole formed in the clamping member. The low-friction member has a portion of its outer circumference formed in a straight line and includes a cut portion facing the insertion direction of the clamping member. The head-up display device according to claim 2.

5. The aforementioned retaining member is A pin that passes along the rotation axis and allows the shaft portion and the shaft support portion to rotate relative to each other, The pin is provided with a pressing member that pushes the low-friction member toward the lever portion or the shaft support portion, The head-up display device according to claim 1.

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