Mirror device and vehicular display device

Abstract

To provide a mirror device and a vehicular display device that can suppress occurrence of twisting between a power transmission member and a mirror.SOLUTION: A mirror device 200 comprises: a mirror 30 including a body part 31 with a reflective surface 31a reflecting display light Lt, and a rotary shaft 32 projecting from a lateral wall of the body part; a motor 41 including an output shaft 41a disposed on a rotation axis AX1 of the rotary shaft; and a power transmission member 42 for transmitting drive force of the motor to the rotary shaft. In the power transmission member and the mirror, first assembly portions 31e, 42a are formed by being mutually engaged in a direction along the rotation axis at a position adjacent to the rotary shaft.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a mirror device and a display device for a vehicle. [Background technology]

[0002] Patent Document 1 discloses a mirror unit having a supported part in which a rotation central shaft of a mirror holder is rotatably supported by a frame. The outer peripheral surface of the supported part is a cylindrical surface, and a cylindrical surface forming part of the rotation central shaft, which is the part where the cylindrical surface is formed, is formed with a plurality of radially thinned parts that are recessed in the radial direction from the outer peripheral surface of the rotation central shaft. With this configuration, it is said that in the mirror unit of Patent Document 1, even if the length of the rotation central shaft formed in the mirror holder and inserted into the coil spring becomes long, the variation in the overall thickness of the rotation central shaft can be suppressed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-167873 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in a mirror device, twisting can occur between the mirror and the power transmission member that transmits the driving force of the motor to the mirror, which can result in a time lag between the rotation of the motor and the rotation of the mirror when the angle of the mirror is changed to a specified angle by the driving force of the motor.

[0005] An object of the present invention is to provide a mirror device and a vehicle display device that can suppress the occurrence of twisting between a power transmission member and a mirror. [Means for solving the problem]

[0006] The mirror device of the present invention comprises a mirror including a main body having a reflective surface that reflects display light and a rotating shaft protruding from a side wall of the main body, a motor including an output shaft arranged on the rotation axis of the rotating shaft, and a power transmission member that transmits the driving force of the motor to the rotating shaft, and is characterized in that the power transmission member and the mirror are formed with a first assembly portion that fits into each other in a direction along the rotation axis at a position adjacent to the rotating shaft.

[0007] The vehicle display device of the present invention comprises a housing having an opening, an image display device provided within the housing and outputting display light for an image, and a mirror device provided within the housing, the mirror device comprising a main body portion having a reflective surface that reflects the display light from the image display device toward the opening, a mirror including a rotating shaft protruding from a side wall of the main body portion, a motor including an output shaft arranged on the rotation axis of the rotating shaft, and a power transmission member that transmits the driving force of the motor to the rotating shaft, and the power transmission member and the mirror are characterized in that a first assembly portion is formed that fits into each other in a direction along the rotation axis at a position adjacent to the rotating shaft. Effect of the Invention

[0008] The mirror device and the vehicle display device according to the present invention have an advantage that the occurrence of twisting between the power transmission member and the mirror can be suppressed. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing a vehicle equipped with a display device for a vehicle according to an embodiment. [Diagram 2] FIG. 2 is a schematic configuration diagram showing the vehicle display device according to the embodiment. [Diagram 3] FIG. 3 is a perspective view showing the mirror device according to the embodiment. [Figure 4] FIG. 4 is an exploded perspective view showing the mirror device according to the embodiment. [Diagram 5] FIG. 5 is an exploded perspective view showing the mirror device according to the embodiment. [Figure 6] FIG. 6 is a plan view showing the power transmission member of the embodiment. [Figure 7] FIG. 7 is an enlarged perspective view showing a state in which the power transmission member of the embodiment is attached to a mirror. [Figure 8] FIG. 8 is a cross-sectional view showing a state in which the power transmission member of the embodiment is attached to a mirror. [Figure 9] FIG. 9 is a cross-sectional view showing a state in which the mirror device according to the embodiment is assembled to the lower case. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a mirror device and a display device for a vehicle according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiment. In addition, the components in the following embodiments include those that a person skilled in the art can easily imagine or that are substantially the same.

[0011] [Embodiment] An embodiment will be described with reference to Fig. 1 to Fig. 9. The embodiment relates to a mirror device and a display device for a vehicle. Fig. 1 is a diagram showing a vehicle equipped with a display device for a vehicle according to an embodiment, Fig. 2 is a schematic configuration diagram showing a display device for a vehicle according to an embodiment, Fig. 3 is a perspective view showing a mirror device according to an embodiment, Fig. 4 is an exploded perspective view showing a mirror device according to an embodiment, Fig. 5 is an exploded perspective view showing a mirror device according to an embodiment, Fig. 6 is a plan view showing a power transmission member of an embodiment, Fig. 7 is an enlarged perspective view showing a state in which the power transmission member of an embodiment is attached to a mirror, Fig. 8 is a cross-sectional view showing a state in which the power transmission member of an embodiment is attached to a mirror, and Fig. 9 is a cross-sectional view showing a state in which the mirror device according to an embodiment is assembled to a lower case.

[0012] The vehicle display device 100 of the embodiment shown in FIG. 1 is a head-up display device mounted on a vehicle 300 such as an automobile. The vehicle display device 100 is accommodated in an instrument panel 320 of the vehicle 300. The vehicle display device 100 projects display light Lt of an image toward a reflecting surface 310a of a windshield 310 of the vehicle 300 through an opening of the instrument panel 320. The windshield 310 is a reflecting portion located in front of an eye point EP in the vehicle 300, and has, for example, semi-transparency, and reflects the display light Lt incident from the vehicle display device 100 to the reflecting surface 310a toward the eye point EP. The driver of the vehicle 300 can view a virtual image Vi by the display light Lt reflected by the windshield 310.

[0013] 2, the vehicle display device 100 includes a housing 10, an image display device 20, a mirror device 200, a reflecting member RM, and a control unit CR. The housing 10 is formed in a box shape, and is mounted on the vehicle 200. The housing 10 accommodates the image display device 20, the mirror device 200, the reflecting member RM, and the control unit CR in a accommodating section HS inside the housing 10. The image display device 20, the mirror device 200, the reflecting member RM, and the control unit CR are fixed to the housing 10.

[0014] An opening 12a through which the display light Lt is emitted from inside the housing 10 toward the reflecting surface 310a of the windshield 310 is formed in the housing 10, and a cover member 13 is attached to cover the opening 12a. The cover member 13 is a light-transmitting member that transmits at least the display light Lt emitted by the image display device 20.

[0015] The housing 10 of the embodiment includes a lower case 11 and an upper case 12. The lower case 11 and the upper case 12 are molded, for example, from an insulating synthetic resin. The lower case 11 is a box-shaped member with an opening at the top, and the upper case 12 is a box-shaped member with an opening at the bottom. The lower case 11 and the upper case 12 are engaged with each other so that the opening of the lower case 11 and the opening of the upper case 12 are aligned to form the housing 10. In the housing 10 of the embodiment, an opening 12a through which the display light Lt is emitted toward a reflecting surface 310a of the windshield 310 is formed on the top surface of the upper case 12. The image display device 20, the mirror device 200, the reflecting member RM, and the control unit CR are assembled and held in the lower case 11.

[0016] The image display device 20 outputs a display image to be projected onto the windshield 310 as display light Lt. The image display device 20 includes a liquid crystal display section and a backlight unit. The liquid crystal display section is a so-called liquid crystal panel, and is made of, for example, a light-transmitting or light-semi-transmitting TFT liquid crystal display (Thin Film Transistor Liquid Crystal Display). The liquid crystal display section is illuminated from the back side, causing the display surface on the front side to emit light. The backlight unit illuminates the liquid crystal display section from the back side. The backlight unit is driven by power obtained from, for example, a battery (not shown) in the vehicle 300.

[0017] The reflection member RM is a flat mirror, and the reflection surface that reflects the display light Lt is formed as a flat surface. The reflection member RM is disposed at a position facing the image display device 20. The reflection member RM reflects the display light Lt emitted from the image display device 20 toward the mirror 30 of the mirror device 200.

[0018] As shown in Fig. 3, the mirror device 200 includes a mirror 30, a driving member 40, and a bearing member 50. The mirror 30 reflects the display light Lt reflected by the reflecting member RM toward a reflecting surface 310a of the windshield 310 through the opening 12a. The mirror 30 of the embodiment is a concave mirror and has a function as a magnifying mirror. That is, the mirror 30 of the embodiment magnifies and reflects the display image represented by the display light Lt after reflection by the concave mirror 30 so that the display image is relatively larger than the display image represented by the display light Lt before reflection by the mirror 30.

[0019] 4, the mirror 30 includes a main body 31 and rotation axes 32 and 33. The main body 31 has a reflecting surface 31a that reflects the display light Lt. In the embodiment, the main body 31 is a substantially rectangular flat member whose longitudinal direction is along the rotation axis AX1 when viewed in the thickness direction of the main body 31.

[0020] The main body 31 has a first side wall 31b and a second side wall 31c. The first side wall 31b is one side wall in the longitudinal direction of the main body 31, and the second side wall 31c is the other side wall in the longitudinal direction of the main body 31. That is, the main body 31 has the first side wall 31b and the second side wall 31c, which is the side wall opposite to the first side wall 31b, in the longitudinal direction of the main body 31. In the embodiment, when the mirror 30 is viewed from the reflecting surface 31a side, the first side wall 31b is the left side wall of the main body 31, and the second side wall 31c is the right side wall of the main body 31. In the embodiment, a pedestal portion 31d is formed in a part of the first side wall 31b. The pedestal portion 31d is formed at a position where a part of the pedestal portion 31d overlaps with the rotation axis AX1. In the embodiment, the base portion 31d is formed in a cylindrical shape protruding from the surface surrounding the base portion 31d in the first side wall 31b. In the embodiment, the central axis of the base portion 31d is on the rotation axis AX1 of the mirror 30. The rotation axis AX1 is the rotation center of the mirror 30.

[0021] The rotation shafts 32 and 33 of the mirror 30 are each disposed at the position of the rotation axis AX1. The rotation axis AX1 is the rotation center of the mirror 30. The central axes of the rotation shafts 32 and 33 of the mirror 30 each lie on the rotation axis AX1.

[0022] The rotating shaft 32 is formed on a base portion 31d on a first side wall 31b of the main body portion 31. The rotating shaft 32 protrudes from the base portion 31d along the rotation axis AX1. The rotating shaft 33 protrudes from a second side wall 31c of the main body portion 31 along the rotation axis AX1. A driving member 40 is attached to the rotating shaft 32, and a bearing member 50 is attached to the rotating shaft 33. The driving member 40 and the bearing member 50 are fixed to the housing 10 by fixing members such as screws. The mirror 30 is attached to the housing 10 via the driving member 40 and the bearing member 50 (see FIG. 9).

[0023] 4, the driving member 40 includes a motor 41, a power transmission member 42, a motor support portion 43, a first spring 44, a second spring 45, and a screw 46. The motor 41 includes an output shaft 41a and a motor case 41b.

[0024] The motor 41 rotates the output shaft 41a by power supplied from a vehicle battery or the like. The motor case 41b contains components such as a rotor and a stator for consuming the supplied power to rotate the output shaft 41a. The motor case 41b also has a connector for electrically connecting to a control unit or the like.

[0025] The control unit CR is connected to the connector of the motor case 41b, and can control the rotation of the output shaft 41a of the motor 41 by controlling the motor 41. For example, the control unit CR can control the rotation speed, rotation amount, rotation direction, etc. of the output shaft 41a of the motor 41. The control unit CR can change the angle of the mirror 30 by controlling the rotation of the output shaft 41a of the motor 41.

[0026] The power transmission member 42 is a member that connects the output shaft 41a of the motor 41 and the rotation shaft 32 of the mirror 30, and transmits the driving force of the motor 41 to the rotation shaft 32 of the mirror 30. The power transmission member 42 is formed as a cylindrical member extending along the rotation axis AX1, with a first opening formed at one end thereof for fitting with the rotation shaft 32, and a second opening formed at the other end thereof for fitting with the output shaft 41a. Both the first opening and the second opening are located on the rotation axis AX1.

[0027] 4 and 5, the rotating shaft 32 is formed in a prismatic shape extending along the rotation axis AX1, and a first opening of the power transmission member 42 is formed in a shape corresponding to the rotating shaft 32 (i.e., a shape that can be fitted with the rotating shaft 32). The power transmission member 42 is assembled to the mirror 30 by inserting the rotating shaft 32 into the first opening and fitting the rotating shaft 32 to the first opening.

[0028] 5, in the embodiment, the power transmission member 42 and the mirror 30 are formed with first assembly parts 31e, 42a that fit together in a direction along the rotation axis AX1 at a position adjacent to the rotation shaft 32. The first assembly parts 31e, 42a in the embodiment are composed of a recess 31e formed in the base part 31d and a protrusion 42a formed in the power transmission member 42.

[0029] The recess 31e in the mirror 30 is a groove-like recess formed in the base portion 31d, and is formed so as to fit with the protrusion 42a of the power transmission member 42 by being inserted along the rotation axis AX1. In the embodiment, the recess 31e is formed at a position adjacent to the rotation shaft 32, and is formed by recessing a part of the surface of the base portion 31d on the motor 41 side toward the opposite side to the motor 41 side. In other words, the recess 31e is formed by cutting out a part of the outer periphery of the base portion 31d (the part of the base portion 31d around the rotation shaft 32).

[0030] The protrusion 42a of the power transmission member 42 is provided on the outer circumferential wall of the first opening of the power transmission member 42. The protrusion 42a is formed by protruding a portion of the outer circumferential wall of the first opening toward the mirror 30 along the rotation axis AX1.

[0031] In the embodiment, the convex portion 42a has a prismatic shape, and the concave portion 31e is formed in a shape corresponding to the convex portion 42a. That is, the concave portion 31e is formed in a shape that can be fitted with the convex portion 42a by inserting the convex portion 42a along the rotation axis AX1. The concave portion 31e and the convex portion 42a are formed in positions that fit with each other when the relative positions of the rotating shaft 32 and the power transmission member 42 are assembled in a normal position, and do not fit with each other when the relative positions of the rotating shaft 32 and the power transmission member 42 are assembled in an irregular position different from the normal position. That is, in the power transmission member 42 and the mirror 30, the first assembly portions 31e and 42a fit with each other when the relative positions of the rotating shaft 32 and the power transmission member 42 are assembled in a normal position, and do not fit with each other when the relative positions of the rotating shaft 32 and the power transmission member 42 are assembled in an irregular position different from the normal position. With this configuration, when assembling the power transmission member 42 and the mirror 30, the occurrence of incorrect assembly can be suppressed.

[0032] Here, the case where the relative position between the rotating shaft 32 and the power transmission member 42 is in an irregular position refers to, for example, a case where the relative positional relationship between the rotating shaft 32 and the power transmission member 42 in the correct position is inverted 180 degrees around the rotation axis AX1. For example, the first assembly parts 31e, 42a may be formed so as to interfere with the counterpart member (the mirror 30 or the power transmission member 42) when the relative position between the rotating shaft 32 and the power transmission member 42 is in an irregular position, thereby making it impossible to assemble the rotating shaft 32 and the power transmission member 42.

[0033] 5 and 6, second assembly parts 32b, 42b that fit together are formed on the tip end of the rotating shaft 32 and the power transmission member 42. The second assembly parts 32b, 42b in the embodiment are constituted by a protrusion 32b formed on the rotating shaft 32 and an opening 42b formed in the power transmission member 42.

[0034] As shown in Fig. 5, the protruding portion 32b in the embodiment is formed by protruding a part of the tip surface of the rotating shaft 32 toward the motor 41 side relative to another part of the tip surface of the rotating shaft 32. The protruding portion 32b is formed in a prismatic shape extending along the rotation axis AX1. Fig. 6 is a plan view of the power transmission member 42 as viewed from the rotating shaft 32 side, and as shown in Fig. 6, the power transmission member 42 in the embodiment is formed with a wall portion 42d that separates the first opening and the second opening. The opening 42b of the power transmission member 42 is formed in a part of the wall portion 42d.

[0035] 7 and 8, the protrusion 32b and the opening 42b are formed to fit together when the rotating shaft 32 and the power transmission member 42 are assembled in the correct position. Note that Fig. 7 is a cross-sectional view corresponding to Fig. 8, and, like Fig. 7, for the sake of explanation, members other than the mirror 30 and the power transmission member 42 are omitted.

[0036] Here, the protrusion 32b and the opening 42b are formed at positions where they fit together when the relative positions of the rotating shaft 32 and the power transmission member 42 are in a normal position and do not fit together when the rotating shaft 32 and the power transmission member 42 are assembled in an irregular position. That is, in the tip of the rotating shaft 32 and the power transmission member 42, the second assembly parts 32b, 42b fit together when the relative positions of the rotating shaft 32 and the power transmission member 42 are in a normal position and do not fit together when the rotating shaft 32 and the power transmission member 42 are assembled in an irregular position. This configuration also makes it possible to prevent erroneous assembly when assembling the power transmission member 42 and the mirror 30. In addition, in the case of such a configuration, for example, even if an attempt is made to erroneously assemble a power transmission member that does not have the opening 42b (a power transmission member used in a mirror device other than the mirror device 200 according to the embodiment), the protrusion 32b restricts the assembly of the mirror 30 and the power transmission member. This configuration reduces the occurrence of incorrect assembly.

[0037] Furthermore, for example, the second assembly portions 32b, 42b may be formed so as to interfere with the mating member (the mirror 30 or the power transmission member 42) when the relative position between the rotating shaft 32 and the power transmission member 42 is in an irregular position, thereby making it impossible to assemble the rotating shaft 32 and the power transmission member 42 together.

[0038] 5 and 7, the rotating shaft 32 and the power transmission member 42 are formed with third assembly parts 32c, 42c that engage with each other. In the embodiment, the third assembly parts 32c, 42c are formed by a locking claw 32c formed on the rotating shaft 32 and a locking arm 42c formed on the power transmission member 42. For the sake of explanation, members other than the mirror 30 and the power transmission member 42 are omitted in FIG. 7.

[0039] The locking claw 32c is a protrusion formed on the side surface of the rotating shaft 32 (the surface perpendicular to the rotation axis AX1) and is formed to engage with the locking arm 42c. The locking claw 32c is formed by protruding from the surface surrounding the rotating shaft 32. As shown in Fig. 5, in this embodiment, the locking claw 32c is formed on the surface of the rotating shaft 32 facing upward.

[0040] The locking arm 42c is a part that constitutes a part of the side wall of the first opening of the power transmission member 42, and includes a leaf spring-shaped arm portion and a frame-shaped locking portion provided at the tip of the arm portion. When the rotating shaft 32 and the power transmission member 42 are assembled, the locking portion of the locking arm 42c climbs over the locking claw 32c, and when the assembly of the rotating shaft 32 and the power transmission member 42 is completed, the locking claw 32c is positioned inside the frame-shaped locking portion, and the locking arm 42c and the locking claw 32c engage with each other (see FIG. 7).

[0041] In the rotating shaft 32 and the power transmission member 42, the third assembly parts 32c, 42c fit together when the rotating shaft 32 and the power transmission member 42 are assembled in a normal relative position, and do not fit together when the rotating shaft 32 and the power transmission member 42 are assembled in an abnormal relative position. This configuration also makes it possible to prevent incorrect assembly from occurring when assembling the power transmission member 42 and the mirror 30.

[0042] Furthermore, for example, the third assembly portions 32c, 42c may be formed so as to interfere with the mating member (the mirror 30 or the power transmission member 42) when the relative position between the rotating shaft 32 and the power transmission member 42 is in an irregular position, thereby making it impossible to assemble the rotating shaft 32 and the power transmission member 42 together.

[0043] Furthermore, even if a power transmission member not having the locking arm 42c (a power transmission member used in a mirror device other than the mirror device 200 according to the embodiment) is mistakenly assembled, the locking claw 32c restricts the assembly of the mirror 30 and the power transmission member. This configuration prevents the occurrence of incorrect assembly.

[0044] The motor support part 43 is a member that is fixed to the housing 10 (see FIG. 8) in a state in which the motor 41 is supported. The motor support part 43 is formed so as to cover the power transmission member 42. In the embodiment, the motor support part 43 is formed with an insertion hole into which the power transmission member 42 is inserted. The insertion hole opens in a direction along the rotation axis AX1.

[0045] The power transmission member 42 is inserted into the insertion hole of the motor support part 43 from the side opposite to the main body part 31 side of the mirror 30 with respect to the motor support part 43. The power transmission member 42 inserted into the insertion hole is held within the motor support part 43 with the tip of the power transmission member 42 (the end on the main body part 31 side) protruding from the insertion hole of the motor support part 43.

[0046] In addition, the first assembly portions 31e, 42a of the power transmission member 42 are exposed to the outside from the motor support portion 43, so that it is possible to visually check from the outside whether the recessed portion 31e and the protruding portion 42a of the first assembly portions 31e, 42a are engaged with each other.

[0047] 4, the motor 41 is attached to and held by the motor support part 43 from above the power transmission member 42. The motor 41 is fixed to the motor support part 43 by screws 46. By fixing the motor 41 and the motor support part 43 by the screws 46, the power transmission member 42 is also fixed in a state of being housed inside the motor support part 43.

[0048] In the embodiment, the power transmission unit 42 and the motor support unit 43 are provided with hook portions 42e and 43a, respectively. The hook portion 42e of the power transmission unit 42 is exposed from the motor support unit 43. The first spring 44 is an expandable coil spring, and has ring portions at both ends. One ring portion of the first spring 44 is attached to the hook portion 42e of the power transmission unit 42, and the other ring portion of the first spring 44 is attached to the hook portion 43a of the motor support unit 43. The first spring 44 suppresses rattling between the power transmission unit 42 and the motor support unit 43 by the contraction force of the spring.

[0049] The second spring 45 is an expandable coil spring. In the embodiment, a flange portion is formed on an end portion of the power transmission unit 42 opposite to the main body unit 31 side of the mirror 30, and the flange portion faces the motor support unit 43 in the direction of the rotation axis AX1. The second spring 45 is provided between the flange portion of the power transmission unit 42 and the motor support unit 43, and suppresses rattling between the power transmission unit 42 and the motor support unit 43.

[0050] 4, a driving member 40 is attached to the rotating shaft 32, and a bearing member 50 is attached to the rotating shaft 33. The mirror 30 is attached to the lower case 11 via the driving member 40 and the bearing member 50. For example, the driving member 40 and the bearing member 50 are fixed to the lower case by fixing members such as screws.

[0051] The control unit CR controls the image display device 20 to control the display image (virtual image) displayed by the vehicle display device 100 (see FIG. 2). The control unit CR is also connected to the mirror device 200, and can adjust the angle of the main body 31 of the mirror 30 by controlling the rotation of the motor 41 of the mirror device 200. In other words, the control unit CR controls the mirror device 200 to adjust the display position of the display image.

[0052] As described above, the mirror device 200 according to the embodiment includes a mirror 30 including a main body 31 having a reflective surface 31a that reflects the display light Lt and a rotating shaft 32 protruding from a side wall of the main body 31, a motor 41 including an output shaft 41a arranged on the rotation axis AX1 of the rotating shaft 32, and a power transmission member 42 that transmits the driving force of the motor 41 to the rotating shaft 32, and the power transmission member 42 and the mirror 30 are formed with first assembly portions 31e, 42a that fit together in a direction along the rotation axis AX1 at a position adjacent to the rotating shaft 32.

[0053] In the mirror device 200 according to the embodiment, the power transmission member 42 and the mirror 30 are formed with first assembly parts (recess 31e, protrusion 42a) that fit together in a direction along the rotation axis AX1 at a position adjacent to the rotation shaft 32. That is, in the embodiment, the first assembly parts (recess 31e, protrusion 42a) are provided at a position shifted from the rotation axis AX1 that is the rotation center (i.e., a position outside the rotation axis AX1). Since the first assembly parts (recess 31e, protrusion 42a) are fitted outside the rotation axis AX1, when the mirror 30 of the mirror device 200 rotates (when the angle of the mirror 30 is changed to a predetermined angle by the driving force of the motor 41), it is possible to suppress twisting of the part outside the rotation center (rotation axis AX1) with respect to the rotation center. In addition, since the first assembly portion (the recess 31e and the protrusion 42a) is provided separately from the rotating shaft 32, the power transmission member 42 and the mirror 30 are connected more firmly than when they are connected only by the rotating shaft 32, and therefore, when the angle of the mirror 30 is changed to a predetermined angle by the driving force of the motor 41, it is possible to suppress the occurrence of twisting between the power transmission member 42 and the mirror 30. Therefore, it is possible to suppress the occurrence of a time lag between the rotation of the motor and the rotation of the mirror due to the twisting between the power transmission member 42 and the mirror 30. In addition, in the mirror device 200, by suppressing the twisting between the power transmission member 42 and the mirror 30, it is possible to smoothly transmit the driving force of the motor 41 to the mirror 30, and the driving efficiency of the motor 41 can be improved.

[0054] Furthermore, in the mirror device 200 according to the embodiment, in the power transmission member 42 and the mirror 30, the first assembly portions 31e, 42a engage with each other when the relative positions of the rotating shaft 32 and the power transmission member 42 are assembled in a normal position, and do not engage with each other when the relative positions of the rotating shaft 32 and the power transmission member 42 are assembled in an abnormal position.

[0055] In the mirror device 200 according to the embodiment, the first assembly parts 31e, 42a engage with each other when the relative positions of the rotating shaft 32 and the power transmission member 42 are assembled in the correct position, and do not engage with each other when the relative positions of the rotating shaft 32 and the power transmission member 42 are assembled in an incorrect position, thereby preventing incorrect assembly from occurring when assembling the mirror 30 and the power transmission member 42.

[0056] Furthermore, in the mirror device 200 according to the embodiment, second assembly portions 32b, 42b that fit into each other are formed on the tip of the rotating shaft 32 and the power transmission member 42, and the second assembly portions 32b, 42b of the tip of the rotating shaft 32 and the power transmission member 42 fit into each other when the relative positions of the rotating shaft 32 and the power transmission member 42 are assembled in a normal position, but do not fit into each other when the relative positions of the rotating shaft 32 and the power transmission member 42 are assembled in an abnormal position.

[0057] In the mirror device 200 according to the embodiment, the second assembly parts 32b, 42b fit together only when the rotation shaft 32 and the power transmission member 42 are assembled in the correct relative positions, and therefore, it is possible to prevent erroneous assembly from occurring when assembling the mirror 30 and the power transmission member 42. Furthermore, by providing the second assembly parts 32b, 42b together with the first assembly parts 31e, 42a, it is possible to further improve the function of preventing erroneous assembly.

[0058] Moreover, the vehicle display device 100 according to the embodiment includes a housing 10 having an opening, an image display device 20 provided within the housing 10 and outputting display light Lt of an image, and a mirror device 200 provided within the housing 10. The mirror device 200 includes a mirror 30 including a main body 31 having a reflective surface 31a that reflects the display light Lt from the image display device 20 toward the opening, and a rotating shaft 32 protruding from a side wall of the main body 31, a motor 41 including an output shaft 41a arranged on the rotation axis AX1 of the rotating shaft 32, and a power transmission member 42 that transmits the driving force of the motor 41 to the rotating shaft 32. The power transmission member 42 and the mirror 30 are formed with first assembly portions 31e, 42a that fit together in a direction along the rotation axis AX1 at a position adjacent to the rotating shaft 32.

[0059] In the vehicle display device 100 according to the embodiment, the power transmission member 42 and the mirror 30 are formed with first assembly parts (recess 31e, protrusion 42a) that fit together in a direction along the rotation axis AX1 at a position adjacent to the rotation shaft 32. That is, in the embodiment, the first assembly parts (recess 31e, protrusion 42a) are provided at a position shifted from the rotation axis AX1, which is the rotation center (i.e., a position outside the rotation axis AX1). Since the first assembly parts (recess 31e, protrusion 42a) are fitted outside the rotation axis AX1, when the mirror 30 of the mirror device 200 rotates (when the angle of the mirror 30 is changed to a predetermined angle by the driving force of the motor 41), it is possible to suppress twisting of the part outside the rotation center (rotation axis AX1) with respect to the rotation center. In addition, since the first assembly portion (concave portion 31e, convex portion 42a) is provided separately from the rotating shaft 32, the power transmission member 42 and the mirror 30 are connected more firmly than when they are connected only by the rotating shaft 32, and therefore, when the angle of the mirror 30 is changed to a predetermined angle by the driving force of the motor 41, it is possible to suppress the occurrence of twisting between the power transmission member 42 and the mirror 30. Therefore, it is possible to suppress the occurrence of a time lag between the rotation of the motor and the rotation of the mirror due to the twisting between the power transmission member 42 and the mirror 30. In addition, in the vehicle display device 100, by suppressing the twisting between the power transmission member 42 and the mirror 30, it is possible to smoothly transmit the driving force of the motor 41 to the mirror 30, and the driving efficiency of the motor 41 can be improved.

[0060] [Variations] In the above embodiment, the first assembly part is configured by the recess 31e formed in the base part 31d and the protrusion 42a formed in the power transmission member 42, but the present invention is not limited to this configuration. For example, the first assembly part may be configured by a protrusion formed in the base part 31d and a recess formed in the power transmission member 42. In the case of such a configuration, even if an attempt is made to erroneously assemble a power transmission member that does not have a recess (a power transmission member used in a mirror device other than the mirror device 200 according to the embodiment), the assembly of the mirror 30 and the power transmission member is restricted by the protrusion of the base part 31d. This configuration suppresses the occurrence of erroneous assembly.

[0061] In the above embodiment, the second assembly portion is configured by the protrusion 32b formed on the rotating shaft 32 and the opening 42b formed on the power transmission member 42, but is not limited to this configuration. For example, the second assembly portion may be configured by a recess formed on the rotating shaft 32 and a protrusion formed on the wall portion 42d of the power transmission member 42.

[0062] In the above embodiment, the pedestal portion 31d and the rotating shaft 32 are provided on the first side wall 31b of the main body portion 31, and the rotating shaft 33 is provided on the second side wall 31c of the main body portion 31. However, the present invention is not limited to this configuration. For example, the pedestal portion 31d and the rotating shaft 32 may be provided on the second side wall 31c of the main body portion 31, and the rotating shaft 33 may be provided on the first side wall 31b of the main body portion 31c. In this case, the shape of the power transmission member 42 that is compatible with the configuration in which the pedestal portion 31d and the rotating shaft 32 are provided on the first side wall 31b and the shape of the power transmission member 42 that is compatible with the configuration in which the pedestal portion 31d and the rotating shaft 33 are provided on the second side wall 31c are mirror images of each other. Therefore, for example, even if an attempt is made to assemble a power transmission member 42 that is compatible with a configuration in which the base portion 31d and the rotating shaft 32 are provided on the first side wall 31b to the rotating shaft 32 of a mirror 30 that is configured in which the base portion 31d and the rotating shaft 32 are provided on the second side wall 31c, the first assembly portion (concave portion 31e, convex portion 42a), the second assembly portion (32b, 42b), or the third assembly portion (32c, 42c) do not fit together, and therefore assembly of the mirror 30 and the power transmission member 42 is restricted. In other words, assembly of an incorrect combination of the mirror 30 and the power transmission member 42 is restricted, and thus the occurrence of incorrect assembly is suppressed. Similarly, even if one attempts to assemble a power transmission member 42 that is compatible with a configuration in which a base portion 31d and a rotating shaft 32 are provided on the second side wall 31c to the rotating shaft 32 of a mirror 30 in a configuration in which a base portion 31d and a rotating shaft 32 are provided on the first side wall 31b, the first assembly portion (concave portion 31e, convex portion 42a), the second assembly portion (32b, 42b) or the third assembly portion (32c, 42c) do not fit together, thereby restricting the assembly of the mirror 30 and the power transmission member 42, and thereby preventing the occurrence of incorrect assembly.

[0063] In the above embodiment, the image display device 20, the mirror device 40, the reflecting member RM, and the control unit CR are assembled to the lower case 11. However, the present invention is not limited to this configuration. For example, the image display device 20, the mirror device 40, the reflecting member RM, and the control unit CR may be assembled to the upper case 12.

[0064] The contents disclosed in the above embodiments can be implemented in appropriate combinations. [Explanation of symbols]

[0065] 30: Mirror 31: main body, 32, 33: rotating shaft 31e, 42a: 1st assembly section 32b, 42b: 2nd assembly section 32c, 42c: 3rd assembly section 41: motor, 41a: output shaft, 42: power transmission member 100: vehicle display device, 200: mirror device 300: Vehicle, RM: Reflective material CR: Control unit

Claims

1. a mirror including a main body having a reflective surface that reflects display light and a rotation shaft protruding from a side wall of the main body; a motor including an output shaft disposed on a rotation axis of the rotary shaft; a power transmission member that transmits a driving force of the motor to the rotating shaft; Equipped with a first assembly portion is formed on the power transmission member and the mirror at a position adjacent to the rotation shaft, the first assembly portion being fitted to each other in a direction along the rotation axis; A mirror device comprising:

2. In the power transmission member and the mirror, the first assembly portion fits with each other when the rotation shaft and the power transmission member are assembled in a normal relative position, and does not fit with each other when the rotation shaft and the power transmission member are assembled in an abnormal relative position.

2. The mirror device according to claim 1.

3. a second assembly portion is formed on the tip end of the rotating shaft and the power transmission member, the second assembly portion being fitted into the tip end of the rotating shaft and the power transmission member; the second assembly portion of the tip end of the rotating shaft and the power transmission member engages with each other when the rotating shaft and the power transmission member are assembled in a normal relative position, and does not engage with each other when the rotating shaft and the power transmission member are assembled in an abnormal relative position; 3. The mirror device according to claim 1 or 2.

4. A housing having an opening; an image display device that is provided within the housing and outputs a display light for an image; a mirror device provided in the housing; Equipped with The mirror device includes: a mirror including a main body having a reflective surface that reflects display light from the image display device toward the opening, and a rotation shaft protruding from a side wall of the main body; a motor including an output shaft disposed on a rotation axis of the rotary shaft; a power transmission member that transmits a driving force of the motor to the rotating shaft; Equipped with a first assembly portion is formed on the power transmission member and the mirror at a position adjacent to the rotation shaft, the first assembly portion being fitted to each other in a direction along the rotation axis; A display device for a vehicle.

Images