Vehicle display device

Abstract

To provide a configuration of a display device suitable for suppressing positional deviation of a rotation shaft.SOLUTION: A vehicle display device comprises: a display unit 10; a movable reflection member 40; a drive unit 50 that rotates the movable reflection member around a rotation shaft 53 to change the display position of a virtual image; a support member 54 that has a groove-shaped bearing portion 54a in which the rotation shaft is fitted and fixed to a lower case 70A; a first elastic member 55 that is fixed to the support member and presses the rotation shaft toward the groove bottom with the elastic force directed toward the groove bottom of the bearing portion; and a second elastic member 56 that restricts displacement of the rotation shaft in an axial direction of the rotation shaft. The second elastic member includes a fitting portion 56a fitted to a fitted portion 73 in a fitting direction orthogonal to the axis of the rotation shaft, and a flexible piece portion 56b capable of bending deformation in the axial direction of the rotation shaft. The flexible piece portion maintains the rotation shaft at a prescribed mounting position by the reaction force acting on a protruding portion 53a involved in the bending deformation. An upper case 70C is provided with a locking portion 74 that locks the fitting portion and holds the fitting portion in a retained state relative to the fitted portion.SELECTED DRAWING: Figure 6

Description

[Technical Field]

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

[0002] Conventionally, vehicles are equipped with a vehicle display device that displays information to be provided to occupants in the vehicle cabin as a virtual image. This vehicle display device is a so-called head-up display device and includes a display unit that emits display information to be projected onto a projection target as display light, a reflecting member that reflects the display light emitted from the display unit and projects the display light onto the projection target, and a housing that accommodates these components. This vehicle display device projects the display light reflected by the reflecting member onto the projection target outside the housing, allowing occupants to view display information corresponding to the projected display light as a virtual image. Here, this vehicle display device can perform adjustment control of the virtual image display position, which changes the imaging position (display position) of the virtual image by controlling the rotation of the reflecting member. This type of vehicle display device is disclosed, for example, in Patent Documents 1 and 2 listed below. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-078966 [Patent Document 2] Japanese Patent Publication No. 2022-103700 Summary of the Invention [Problem to be solved by the invention]

[0004] In a vehicle display device, misalignment of the rotation axis of the reflecting member leads to misalignment of the reflecting member, causing a misalignment of the virtual image display position. For example, the vehicle display device of Patent Document 1 above is provided with a bearing component including a support member having a V-shaped groove into which the rotation axis is fitted, and an elastic member that applies a resilient force toward the bottom of the V-shaped groove to the rotation axis to press the rotation axis against the groove bottom, in order to suppress misalignment of the rotation axis in a direction perpendicular to the axis of the rotation axis. Furthermore, the vehicle display device of Patent Document 2 above is provided with an elastic member that suppresses misalignment of the rotation axis of the reflecting member in the axial direction. In this vehicle display device, it is necessary to suppress misalignment of the elastic member in order to suppress misalignment of the rotation axis, and there is room for improvement in this regard.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a vehicle display device that is suitable for suppressing misalignment of a rotation shaft. [Means for solving the problem]

[0006] The present invention provides an automobile vehicle with an outer case that includes an assembled lower case and upper case to form an interior space; a display unit that emits display information into the outer case as display light to be viewed as a virtual image by occupants in a vehicle cabin; one reflecting member or a plurality of reflecting members that reflect the display light emitted from a display of the display unit inside the outer case; a drive unit that rotates the one reflecting member or one of the plurality of reflecting members as a movable reflecting member around the axis of a rotation shaft to change the display position of the virtual image; a support member that has a groove-shaped bearing portion into which the rotation shaft is fitted and is fixed to the lower case; a first elastic member that is fixed to the support member and that applies a resilient force to the rotation shaft toward a groove bottom of the bearing portion to press the rotation shaft toward the groove bottom; and a second elastic member that restricts axial displacement of the rotation shaft. The rotating shaft has a protruding portion that protrudes from the outer peripheral surface, and the second elastic member has a fitting portion that is fitted into the fitting portion of the lower case in a fitting direction perpendicular to the axis of the rotating shaft and held in the fitting portion, and a flexible piece portion that has a cantilever shape with its free end located on the fitting direction side of a fixed end provided on the fitting portion side and has flexibility that allows it to flex and deform in the axial direction of the rotating shaft, when the fitting portion is held in the fitting portion and the rotating shaft is fitted in a specified mounting position relative to the bearing portion, the free end of the flexible piece portion receives a force from the protruding portion and flexes and deforms, and a reaction force associated with the flexural deformation acts on the protruding portion to keep the rotating shaft in the specified mounting position, and the upper case is provided with a locking portion that locks the fitting portion that has moved in the opposite direction to the fitting direction, thereby keeping the fitting portion held in place relative to the fitting portion. [Effects of the Invention]

[0007] The vehicle display device according to the present invention can suppress misalignment of the rotation shaft in a direction intersecting the axis with the first elastic member, and can suppress misalignment of the rotation shaft in the axial direction with the second elastic member. In the vehicle display device according to the present invention, the first elastic member is fixed to the lower case via the support member, thereby maintaining the function of the first elastic member in suppressing misalignment of the rotation shaft. Furthermore, in the vehicle display device according to the present invention, the locking portion of the upper case can keep the mating portion of the second elastic member and the mated portion of the lower case in a mated state (retained state), thereby maintaining the function of the second elastic member in suppressing misalignment of the rotation shaft. Therefore, the vehicle display device according to the present invention can maintain the rotation shaft in a specified mounting position relative to the bearing portion, making it suitable for suppressing misalignment of the rotation shaft. This prevents misalignment of the movable reflector within the housing, thereby suppressing misalignment of the virtual image display position. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram showing a vehicle display device according to an embodiment. [Figure 2] FIG. 2 is a perspective view showing the vehicle display device according to the embodiment. [Figure 3] FIG. 3 is an exploded perspective view showing the vehicle display device according to the embodiment, with the outer case partially disassembled. [Figure 4] FIG. 4 is an exploded perspective view of the lower case, the lower cover, and the display unit in the outer case. [Figure 5] FIG. 5 is an exploded perspective view showing three reflecting members together with the inner case. [Figure 6] FIG. 6 is a perspective view showing the second concave mirror and its related parts. [Figure 7] FIG. 7 is a perspective view showing the second concave mirror. [Figure 8] FIG. 8 is a perspective view showing the holding member. [Figure 9] FIG. 9 is a perspective view showing a bezel member. [Figure 10]FIG. 10 is a perspective view showing the drive unit. [Figure 11] FIG. 11 is a perspective view showing a bearing component. [Figure 12] FIG. 12 is an exploded perspective view showing the bearing component. [Figure 13] FIG. 13 is a perspective view illustrating a bearing component with a second elastic member. [Figure 14] FIG. 14 is a perspective view illustrating a bearing component with a second elastic member. [Figure 15] FIG. 15 is a perspective view illustrating the locking portion of the upper case. [Figure 16] FIG. 16 is an exploded perspective view showing the first inner case together with the display unit and the plane mirror. [Figure 17] FIG. 17 is an exploded perspective view of the first inner case together with the display unit and the plane mirror, viewed from a different angle. [Figure 18] FIG. 18 is an exploded perspective view showing the second inner case together with the first concave mirror and the second concave mirror. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle display device according to the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiment.

[0010] [Embodiment] One embodiment of a vehicle display device according to the present invention will be described with reference to FIGS.

[0011] 1 to 3, reference numeral 1 denotes a vehicle display device according to this embodiment. The vehicle display device 1 is a so-called head-up display device that displays information to be provided to occupants in the cabin of a vehicle (such as an automobile) as a virtual image. The vehicle display device 1 projects display light relating to the display information onto a projection surface Rwf, such as a windshield, in the cabin, and reflects the display light from the projection surface Rwf toward the occupants, thereby allowing the occupants to visually recognize a virtual image of the display information (FIG. 1).

[0012] The vehicle display device 1 includes a display unit 10 that emits display information as display light into an outer case 70 (described below) to be viewed as a virtual image by passengers in the vehicle cabin (FIGS. 1 and 4). The display unit 10 includes a backlight (not shown) and a light-transmitting, plate-like display 11, and transmits light irradiated from the backlight onto the display 11, causing the light to be emitted from the display 11 as display light for display information (FIGS. 1 and 4). For example, a light-transmitting TFT liquid crystal (Thin Film Transistor Liquid Crystal Display) or the like is used as the display 11.

[0013] Furthermore, this vehicle display device 1 includes one or more reflective members that reflect display light emitted from the display device 11 of the display unit 10 inside the outer case 70. In this vehicle display device 1, the one or one of the reflective members is a movable reflective member that rotates inside the outer case 70. The vehicle display device 1 shown here includes multiple reflective members that reflect the display light emitted from the display device 11 inside the outer case 70 and project the display light from the emission port 70a of the outer case 70 onto a projection area Rwf inside the vehicle cabin. This vehicle display device 1 includes a plane mirror 20, a first concave mirror 30, and a second concave mirror 40 as the multiple reflective members, and the second concave mirror 40 is set as a movable reflective member (FIGS. 1, 3, and 5).

[0014] The plane mirror 20 reflects the display light emitted from the display 11 of the display unit 10 inside the outer case 70. The first concave mirror 30 reflects the display light reflected by the plane mirror 20 inside the outer case 70. The second concave mirror 40 reflects the display light reflected by the first concave mirror 30 inside the outer case 70, and projects the display light from the emission port 70a of the outer case 70 onto the projection area Rwf inside the vehicle cabin. The first concave mirror 30 and the second concave mirror 40 are magnifying mirrors that magnify and reflect the incident display light. For example, the first concave mirror 30 and the second concave mirror 40 are aspherical mirrors (free-form mirrors) whose reflective surfaces are concave into an aspherical shape (free-form shape).

[0015] This vehicle display device 1 includes a holding member 45 that holds the movable reflecting member (second concave mirror 40) from the rear surface 40b behind the display light reflecting surface 40a (FIGS. 6 to 8). This holding member 45 is molded from a highly rigid material that is more rigid than the movable reflecting member (second concave mirror 40). For example, here, the movable reflecting member (second concave mirror 40) includes a base plate (not shown) molded from a synthetic resin material, and the holding member 45 is molded from a metal material that is more rigid than the synthetic resin material.

[0016] The vehicle display device 1 also includes a bezel member 46 that covers the outer peripheral edge 40c of the reflective surface 40a of the movable reflective member (second concave mirror 40) and sandwiches the movable reflective member (second concave mirror 40) between itself and a holding member 45 (FIGS. 6, 7, and 9). During manufacturing of the movable reflective member (second concave mirror 40), distortion may occur at the outer peripheral edge 40c. By covering and concealing the outer peripheral edge 40c with the bezel member 46, the vehicle display device 1 can suppress distortion at the outer peripheral edge of the virtual image display. The bezel member 46 is molded from, for example, a synthetic resin material.

[0017] The movable reflecting member (second concave mirror 40) shown here has a main body portion (hereinafter referred to as "mirror body") 41a formed in a rectangular aspherical shape (free-form surface shape) (FIGS. 6 and 7). The movable reflecting member (second concave mirror 40) has a mirror body portion 41a with a reflecting surface (i.e., a mirror surface) 40a and a back surface 40b, and an outer peripheral edge portion 40c of the reflecting surface 40a of the mirror body portion 41a is covered with a bezel member 46. The movable reflecting member (second concave mirror 40) shown here has clamped portions 41b that protrude from three sides of the mirror body portion 41a and are clamped between a holding member 45 and the bezel member 46 (FIG. 7). Here, the mirror body portion 41a has plate-shaped clamped portions 41b on two sides located in the vehicle width direction and one side located above the vehicle.

[0018] The holding member 45 shown here has a main body portion 45a formed in a rectangular aspherical shape (free-form surface shape) and disposed opposite the rear surface 40b of the movable reflecting member (second concave mirror 40) (FIG. 8). The holding member 45 shown here has clamping portions 45b that protrude from three sides of the main body portion 45a and clamp the clamped portion 41b of the movable reflecting member (second concave mirror 40) between the main body portion 45a and the bezel member 46 (FIG. 8). Here, the main body portion 45a has clamping portions 45b on two sides located in the vehicle width direction and one side located above the vehicle.

[0019] The bezel member 46 shown here has a rectangular annular main body portion (hereinafter referred to as the "frame body portion") 46a that covers the outer peripheral edge portion 40c of the mirror body portion 41a of the movable reflecting member (second concave mirror 40) (FIG. 9). The frame body portion 46a has a rectangular annular main wall portion 46a1 that covers the outer peripheral edge portion 40c of the mirror body portion 41a of the movable reflecting member (second concave mirror 40) from the reflecting surface 40a side, and a rectangular annular side wall portion 46a2 that covers the outer peripheral edge portion 40c of the mirror body portion 41a of the movable reflecting member (second concave mirror 40) from the side end side (FIG. 9). The bezel member 46 shown here has clamping portions 46b that protrude from the side wall portions 46a2 of the frame portion 46a for each clamped portion 41b of the movable reflecting member (second concave mirror 40) so as to face the clamped portion 41b, and that clamp the clamped portion 41b of the movable reflecting member (second concave mirror 40) between the clamping portions 45b of the holding member 45 (FIG. 9). Here, the clamping portions 46b are provided on the side wall portions 46a2 of the frame portion 46a at two wall portions located in the vehicle width direction and one wall portion located above the vehicle.

[0020] The clamping portion 45b of the holding member 45 and the clamping portion 46b of the bezel member 46 are fixed with screws at positions other than the clamping portion that clamps the clamped portion 41b of the movable reflecting member (second concave mirror 40). Here, both ends with the clamping portion in between are fixed with screws.

[0021] Here, the vehicle display device 1 includes a drive unit 50 that rotates a movable reflecting member (second concave mirror 40) around a rotation axis to change the imaging position (display position) of the virtual image (FIGS. 1, 5, 6, and 10). Here, the movable reflecting member (second concave mirror 40) is rotated around a rotation axis in the vehicle width direction to change the imaging position (display position) of the virtual image in the vehicle up-down direction. The drive unit 50 includes a motor 51 as a drive source, a power transmission mechanism 52 that operates with the output of the motor 51, and a rotary shaft 53 that rotates the movable reflecting member (second concave mirror 40) around its axis with the output of the motor 51 input via the power transmission mechanism 52, with the axial direction being the vehicle width direction (FIGS. 1, 6, and 10).

[0022] Power transmission mechanism 52 may be a mechanism that directly applies a rotational torque corresponding to the output torque of motor 51 to rotation shaft 53. Alternatively, power transmission mechanism 52 may be a power conversion mechanism that converts the output torque of motor 51 into a linear force and applies this linear force to a movable reflecting member (second concave mirror 40), thereby rotating rotation shaft 53 that is positioned eccentrically with respect to the input point of the linear force. Rotation shaft 53 may be provided on second concave mirror 40, or may be provided on holding member 45 that holds second concave mirror 40.

[0023] The rotation shaft 53 shown here is provided on the holding member 45. Therefore, the drive unit 50 rotates the movable reflecting member (second concave mirror 40) around the rotation shaft 53 of the holding member 45 to change the imaging position (display position) of the virtual image. The holding member 45 shown here is provided with a pair of coaxial rotation shafts 53. Each rotation shaft 53 is formed in a columnar or cylindrical shape and protrudes from two clamping portions 45b located on the holding member 45 in the vehicle width direction.

[0024] Hereinafter, one of the rotating shafts 53 will be referred to as a first rotating shaft 53A, and the other rotating shaft 53 will be referred to as a second rotating shaft 53B, as necessary (FIGS. 6 and 8). The first rotating shaft 53A has a protruding portion 53a protruding from its outer circumferential surface. The protruding portion 53a is a flange portion that protrudes concentrically in an annular shape from the outer circumferential surface of the first rotating shaft 53A, and is provided at the end of the first rotating shaft 53A.

[0025] The illustrated power transmission mechanism 52 is a power conversion mechanism that converts the output torque of the motor 51 into a linear force, and includes an input portion to which the linear force is input on the movable reflecting member (second concave mirror 40) side. This input portion is provided on the holding member 45. The drive unit 50 applies a linear force corresponding to the output torque of the motor 51 to this input portion, thereby rotating the movable reflecting member (second concave mirror 40) around the axis of the rotation shaft 53 of the holding member 45. Therefore, the input portion is disposed at an eccentric position with respect to the rotation shaft 53.

[0026] The illustrated input receiving portion has a two-part structure, and is divided into a first input receiving portion 52a formed on holding member 45 and a second input receiving portion 52b fixed to first input receiving portion 52a (FIGS. 8 and 10). In holding member 45 shown here, first input receiving portion 52a is provided in a protruding state on the remaining side (side located below the vehicle) where clamping portion 45b is not provided. Second input receiving portion 52b is provided with an input point where a linear force corresponding to the output torque of motor 51 is input.

[0027] The output shaft 51a of the motor 51 is formed as a screw shaft (FIG. 10). The power transmission mechanism 52 includes a motor support member 52c that supports the motor 51, and two guide shafts 52d that are arranged parallel to the output shaft 51a of the motor 51 and are fixed to the motor support member 52c (FIG. 10). The motor support member 52c is arranged outside a lower case 70A (described later) together with the motor 51, and is fixed to the lower case 70A from the outside with screws.

[0028] Furthermore, the power transmission mechanism 52 includes a slider 52e that is movable relative to the two guide shafts 52d in the axial direction of the two guide shafts 52d and that is movable relative to the two guide shafts 52d in the axial direction when it receives a thrust corresponding to the rotation of the output shaft 51a of the motor 51 (FIG. 10). The slider 52e is provided with an input portion 52f that applies the thrust to the second input portion 52b (FIG. 10). Furthermore, the power transmission mechanism 52 includes an elastic member 52g that causes the second input portion 52b to follow the movement of the slider 52e when a thrust is applied to the slider 52e to separate the input portion 52f from the second input portion 52b (FIG. 10).

[0029] This drive unit 50 rotates the second concave mirror 40 around the rotation axis 53, thereby changing the incident angle of the display light reflected from the first concave mirror 30 onto the second concave mirror 40, and also changing the emission angle of the display light reflected from the second concave mirror 40 toward the projection surface Rwf. By changing the emission angle of the display light from the second concave mirror 40 toward the projection surface Rwf, this drive unit 50 changes the imaging position (display position) of a virtual image related to the display light in the vertical direction of the vehicle.

[0030] The display light projected onto the projection area Rwf is reflected from the projection area Rwf to the eyepoint EP or eyebox EB, where it is visually recognized by the occupant as a virtual image (Figure 1). The eyepoint EP indicates the position of the occupant's eyes inside the vehicle. The eyebox EB indicates the range of the eyepoint EP where the virtual image can be seen.

[0031] The projection target portion Rwf refers to the windshield (here, the front windshield Wf) itself or a portion thereof (FIG. 1). The projection target portion Rwf may also be formed as a half mirror that receives display light from the second concave mirror 40 on a reflective surface, reflects it toward the eyepoint EP or the eyebox EB, and emits light from outside the vehicle toward the occupants. For example, the projection target portion Rwf as a half mirror may be formed as a semi-transparent film that conforms to the curved shape of the windshield (front windshield Wf) and is attached to the interior wall surface of the windshield with an adhesive. The projection target portion Rwf as a half mirror may also be formed as a semi-transparent film that conforms to the curved shape of the windshield (front windshield Wf) and is sealed together with an intermediate film inside the laminated windshield. The projection target portion Rwf as a half mirror may also be a semi-transparent film that is coated, for example, on the interior wall surface of the windshield (front windshield Wf). The projection target portion Rwf may be a combiner that covers the front windshield Wf from the inside of the vehicle compartment.

[0032] The vehicle display device 1 includes a control unit 60 that controls the operation of the display unit 10 and the drive unit 50 (FIG. 1). The control unit 60 controls, for example, the display information (display light) of the display unit 10. The control unit 60 also controls the output of the motor 51 to rotate the second concave mirror 40.

[0033] The vehicle display device 1 includes an outer case 70 and an inner case 80 disposed inside the outer case 70 (FIGS. 2 and 3). In the vehicle display device 1, the housing is composed of the outer case 70 and the inner case 80.

[0034] In addition to the inner case 80, the outer case 70 accommodates at least the display unit 10, the plane mirror 20, the first concave mirror 30, the second concave mirror 40, and part or all of the drive unit 50. The outer case 70 emits display light from the display 11 of the display unit 10 indoors, and then transmits the reflected display light to the second concave mirror 40 and emits it outdoors toward the projection surface Rwf. The outer case 70 has an opening (hereinafter referred to as the "emission port") 70a through which the display light reflected by the second concave mirror 40 is emitted outdoors (FIGS. 2 and 3). The inner case 80 forms an optical path within the outer case 70 between the display 11 of the display unit 10 and the emission port 70a of the outer case 70.

[0035] The outer case 70 has an opening (hereinafter referred to as the "incident port") 70b that allows display light emitted from the display 11 of the display unit 10 fixed to the outside of the vehicle to enter the vehicle interior, and is equipped with a lower case 70A that holds the plane mirror 20 and the second concave mirror 40 inside the vehicle and is fixed to the vehicle body, and a lower cover 70B that houses the display unit 10 outside the lower case 70A and is fixed to the lower case 70A (Figures 2 to 4).

[0036] The display unit 10 is disposed outside the lower case 70A with the display 11 facing the light entrance 70b and facing the interior of the lower case 70A. The display unit 10 is fixed to the lower case 70A with screws outside the lower case 70A. The lower cover 70B houses the display unit 10 in a manner that covers the exterior of the lower case 70A and is fixed to the lower case 70A with screws.

[0037] The lower case 70A has an opening (hereinafter referred to as the "accommodation opening") 70c that opens toward the top of the vehicle (FIGS. 3 and 4). The plane mirror 20, the second concave mirror 40, part or all of the drive unit 50, and the inner case 80 are accommodated in the interior of the lower case 70A through the accommodation opening 70c.

[0038] In this lower case 70A, the plane mirror 20 inside the chamber is sandwiched between it and a first inner case 80A, which will be described later. In this lower case 70A, the peripheral portion of the first concave mirror 30 is placed on the peripheral portion of the accommodation opening 70c, and the first concave mirror 30 is sandwiched between it and an upper case 70C, which will be described later. In this lower case 70A, the rotating shaft 53 on the side of the second concave mirror 40 is held inside the chamber via a bearing component, which will be described later. The lower case 70A is provided with a bearing fixing portion 71 that fixes the bearing component (FIG. 4).

[0039] An outer wall surface of lower case 70A is provided with vehicle body fixing portions 72 for fixing to the vehicle body (FIGS. 2 to 4). Lower case 70A is fixed to the vehicle body at vehicle body fixing portions 72 with screws.

[0040] The outer case 70 further includes an upper case 70C having an exit port 70a, fixed to the lower case 70A, and sandwiching the first concave mirror 30 between the upper case 70C and the lower case 70A, and a transparent cover 70D that closes the exit port 70a (FIGS. 2 and 3). The outer case 70 defines an internal space with the lower case 70A and the upper case 70C assembled together.

[0041] The upper case 70C covers the plane mirror 20, the second concave mirror 40, part or all of the drive unit 50, and the inner case 80 housed in the lower case 70A from the outside, and closes the accommodation opening 70c of the lower case 70A by sandwiching the peripheral edge of the first concave mirror 30 placed on the peripheral edge of the accommodation opening 70c. The upper case 70C is fixed to the lower case 70A with screws while closing the accommodation opening 70c. The upper case 70C has an emission opening 70a above the vehicle. The cover 70D is attached to the upper case 70C in a manner that closes the emission opening 70a.

[0042] The vehicular display device 1 is housed in an instrument panel Pi inside the vehicle cabin with its cover 70D exposed (FIG. 1). In this vehicular display device 1, display light reflected by the second concave mirror 40 is emitted from the cover 70D to the outside of the outer case 70 and projected onto a projection area Rwf located beyond the second concave mirror 40, where the display light is reflected by the projection area Rwf toward the eyepoint EP or the eyebox EB.

[0043] Here, the bearing parts for the rotating shaft 53 on the second concave mirror 40 side will be described. These bearing parts are configured as follows to rotatably support the rotating shaft 53, and are fixed to a bearing fixing portion 71 inside the chamber of the lower case 70A. The drive unit 50 includes a bearing part for each rotating shaft 53.

[0044] The vehicle display device 1 has a groove-shaped bearing portion 54a into which the rotary shaft 53 is fitted, and includes a support member 54 fixed to the lower case 70A as one of the components of the bearing part (FIGS. 6 and 11 to 14).

[0045] The bearing portion 54a has a bottom portion 54a1 having a groove bottom formed therein, a first side wall portion 54a2 that protrudes from the bottom portion 54a1 toward the accommodating opening 70c in the lower case 70A, and a second side wall portion 54a3 that protrudes from the bottom portion 54a1 toward the accommodating opening 70c in the lower case 70A and is disposed opposite the first side wall portion 54a2 with a gap therebetween (FIGS. 11 and 12). The bearing portion 54a has a V- or U-shaped groove portion surrounded by the bottom portion 54a1, the first side wall portion 54a2, and the second side wall portion 54a3. In this embodiment, the bearing portion 54a has a V-shaped groove shape.

[0046] The support member 54 has bottom wall portions 54b, which are formed by projecting bottom portions 54a1 of the groove bottom sides of the bearing portions 54a in a direction perpendicular to the axis of the rotary shaft 53 (FIGS. 11 and 12). The support member 54 also has grip portions 54c that project from the bottom wall portions 54b toward the accommodation opening 70c in the lower case 70A to improve the ease of assembly inside the lower case 70A (FIGS. 11 and 12). For example, an operator may grasp the grip portions 54c and place the bottom wall portion 54b on the bearing fixing portion 71 inside the lower case 70A. The bottom wall portions 54b of the support member 54 are fixed to the bearing fixing portion 71 with screws.

[0047] The vehicle display device 1 is fixed to the support member 54 and includes, as one of the components of the bearing part, a first elastic member 55 that applies a resilient force to the rotating shaft 53 toward the groove bottom of the bearing portion 54a, thereby pressing the rotating shaft 53 toward the groove bottom (Figures 6 and 11 to 14).

[0048] The first elastic member 55 shown here is a metal leaf spring formed into a crank shape (FIGS. 11 and 12). The first elastic member 55 has a first piece 55a at one end placed on the bottom wall 54b of the support member 54, and is fixed together with the bottom wall 54b to the bearing fixing portion 71 of the lower case 70A with screws. When the first elastic member 55 is fixed in this fixed state, it receives force from the rotating shaft 53 placed on the groove bottom of the bearing portion 54a, causing the second piece 55b at the other end to flex and deform toward the accommodation opening 70c of the lower case 70A. Therefore, the first elastic member 55 applies a reaction force (resilient force) toward the groove bottom of the bearing portion 54a to the rotating shaft 53 due to the flexural deformation.

[0049] In this vehicle display device 1, a bearing component is formed by the support member 54 and the first elastic member 55. Therefore, in this vehicle display device 1, even if an external force acts on the rotation shaft 53 in a direction intersecting the axis of the rotation shaft 53, the first elastic member 55 presses the rotation shaft 53 toward the groove bottom of the bearing portion 54a, thereby preventing the rotation shaft 53 from shifting in the intersecting direction.

[0050] In the vehicle display device 1, when an external force acting on the rotation shaft 53 in a direction intersecting the axis acts, the first elastic member 55 receiving the force from the rotation shaft 53 is prevented from deforming to a plastic range. Here, a housing 54d for housing an end of the second arm 55b is provided in the second side wall 54a3 of the bearing 54a of the support member 54 (FIGS. 11 and 12). The housing 54d has an interior space that allows the first elastic member 55 to bend within its elastic range while preventing the first elastic member 55 from being deformed to a plastic range. When the first elastic member 55 is being bent within its elastic range, the end of the second arm 55b moves within the interior space of the housing 54d. The housing 54d prevents the first elastic member 55 from being deformed to a plastic range by engaging the end of the second arm 55b with the inner wall surface of the interior space.

[0051] The vehicle display device 1 further includes a second elastic member 56 as one of the components of the bearing part, which restricts the axial displacement of the rotating shaft 53 (here, the first rotating shaft 53A) (Figures 6, 13 and 14).

[0052] The second elastic member 56 shown here is a metal leaf spring. The second elastic member 56 has a fitting portion 56a that is fitted into a fitting portion 73 of the lower case 70A in a fitting direction perpendicular to the axis of the rotating shaft 53 and is held by the fitting portion 73, and a flexible piece 56b that has a cantilever shape with a free end located on the fitting direction side of a fixed end provided on the fitting portion 56a side and that has flexibility that allows it to flex and deform in the axial direction of the rotating shaft 53 (FIGS. 13 and 14).

[0053] The fitting portion 56a is fitted into the fitted portion 73 of the lower case 70A with the fitting direction aligned with the assembly direction when the upper case 70C is assembled to the lower case 70A. The fitted portion 73 is formed as a convex portion protruding toward the accommodating opening 70c in the lower case 70A. The fitting portion 56a is formed as a concave portion that matches the shape of the fitted portion 73 and into which the fitted portion 73 is inserted and fitted. For example, the fitted portion 73 shown here is formed as a rectangular, one-piece convex portion protruding toward the accommodating opening 70c in the lower case 70A. The fitting portion 56a is formed in a clip shape that clamps each wall surface of the fitted portion 73 when inserted and fitted. The fitting portion 56a has a first clamping piece 56a1 having a one-piece shape that applies a reaction force accompanying bending deformation to one wall surface of the fitted portion 73, and a second clamping piece 56a2 having a one-piece shape that applies a reaction force accompanying bending deformation to the other wall surface of the fitted portion 73 (FIGS. 13 and 14). The fitting portion 56a has a connecting wall 56a3 that connects the first clamping piece 56a1 and the second clamping piece 56a2 on the storage opening 70c side (FIGS. 13 and 14).

[0054] The flexible piece 56b is formed in a piece shape with a fixed end on the side of the second clamping piece 56a2 of the fitting portion 56a and an end protruding from the fixed end in the fitting direction as a free end. When the fitting portion 56a is held by the fitted portion 73 and the rotating shaft 53 is fitted into the bearing portion 54a at a specified mounting position, the free end of the flexible piece 56b is subjected to a force from the protruding portion 53a of the rotating shaft 53 and is flexibly deformed, and a reaction force associated with the flexural deformation acts on the protruding portion 53a, keeping the rotating shaft 53 at the specified mounting position.

[0055] A shaft insertion groove 56b1 is provided on the free end side of the flexible piece 56b, into which the rotary shaft 53 is inserted in the direction opposite to the mating direction (FIGS. 13 and 14). Accordingly, a pair of pressing pieces 56b2 is formed on the free end side of the flexible piece 56b, with the shaft insertion groove 56b1 interposed therebetween (FIG. 14). The pressing pieces 56b2 are disposed opposite the protruding portion 53a of the rotary shaft 53 in the axial direction of the rotary shaft 53. The pressing pieces 56b2 shown here are formed in a mountain shape that convex toward the protruding portion 53a, with their apexes abutting against the protruding portion 53a. That is, in the flexible piece 56b, the apexes of the pair of pressing pieces 56b2 receive force from the protruding portion 53a of the rotary shaft 53, causing the pair of pressing pieces 56b2 to bend and deform in the axial direction of the rotary shaft 53. In the flexible piece portion 56b, a reaction force due to the bending deformation acts on the protruding portion 53a from the peaks of the pair of pressing pieces 56b2, thereby keeping the rotary shaft 53 in the specified mounting position.

[0056] Here, the second elastic member 56 has its fitting portion 56a fitted into the fitted portion 73 of the lower case 70A along the fitting direction, and the rotating shaft 53 is inserted into the shaft insertion groove 56b1 of the flexible piece portion 56b in the direction opposite to the fitting direction, and then the pair of pressing pieces 56b2 at both ends of the second elastic member 56 are pressed in the axial direction against the protruding portion 53a of the rotating shaft 53. For this reason, if an external force such as vibration becomes excessive, the second elastic member 56 may move in the direction opposite to the fitting direction, causing the fitting portion 56a to come off the fitted portion 73 of the lower case 70A.

[0057] Therefore, the upper case 70C is provided with a locking portion 74 that locks the fitting portion 56a when it moves in the direction opposite to the fitting direction, thereby keeping the fitting portion 56a held relative to the fitted portion 73 ( FIG. 15 ). The locking portion 74 is positioned opposite the fitting portion 56a that is positioned in the fitting direction relative to the locking portion 74 when the lower case 70A and the upper case 70C are in the fully assembled position. The locking portion 74 is positioned opposite the fitting portion 56a with a gap therebetween, within a range that does not disengage the fitted state (held state) between the fitting portion 56a and the fitted portion 73. Here, the locking portion 74 is positioned opposite the connecting wall 56a3 of the fitting portion 56a, and the connecting wall 56a3 is locked by the locking portion 74 when the fitting portion 56a moves in the direction opposite to the fitting direction. As a result, in the vehicle display device 1, it is possible to suppress displacement of the rotation shaft 53 in the axial direction from the specified mounting position.

[0058] The inner case 80 is fixed to the lower case 70A within the chamber of the lower case 70A. The inner case 80 sandwiches the plane mirror 20 between itself and the lower case 70A. The inner case 80 includes a first inner case 80A that is fixed to the lower case 70A within the chamber of the lower case 70A and sandwiches the plane mirror 20 within the chamber of the lower case 70A between itself and the lower case 70A, and a second inner case 80B that is fixed to the lower case 70A within the chamber of the lower case 70A (FIGS. 3 and 5).

[0059] The first inner case 80A has a first internal space 81a (FIGS. 5, 16, and 17) that forms an optical path between the display 11 and the plane mirror 20 and an optical path between the plane mirror 20 and the first concave mirror 30. The first inner case 80A has a first opening 81b, a second opening 81c, and a third opening 81d (FIGS. 5, 16, and 17).

[0060] The first opening 81b is disposed opposite the display 11 and allows display light emitted from the display 11 to enter the first internal space 81a. The first opening 81b is disposed opposite the light entrance 70b of the lower case 70A inside the lower case 70A.

[0061] The second opening 81c has an opening periphery that sandwiches the periphery of the plane mirror 20 between itself and the lower case 70A, exposing the plane mirror 20 to the first internal space 81a. Therefore, the second opening 81c allows the display light from the display 11 that has entered the first internal space 81a to be incident on the plane mirror 20, and the display light reflected by the plane mirror 20 to be emitted toward the first concave mirror 30.

[0062] The third opening 81d allows the display light reflected by the plane mirror 20 to exit the first internal space 81a toward the first concave mirror 30.

[0063] The first inner case 80A is fixed to the lower case 70A with screws, with the plane mirror 20 sandwiched between the first inner case 80A and the lower case 70A.

[0064] The second inner case 80B has a second internal space 82a (FIGS. 5 and 18) that forms an optical path between the plane mirror 20 and the first concave mirror 30, an optical path between the first concave mirror 30 and the second concave mirror 40, and an optical path between the second concave mirror 40 and the projection target Rwf. The second inner case 80B has a first opening 82b, a second opening 82c, a third opening 82d, and a fourth opening 82e (FIGS. 5 and 18).

[0065] The first opening 82b is disposed opposite the third opening 81d of the first inner case 80A, so that the first opening 82b allows the display light reflected by the plane mirror 20 toward the first concave mirror 30 to enter the second internal space 82a.

[0066] The second opening 82c is disposed opposite the first concave mirror 30. This allows the display light from the plane mirror 20 that has entered the second internal space 82a to be incident on the first concave mirror 30, and the display light reflected by the first concave mirror 30 to be emitted toward the second concave mirror 40.

[0067] The third opening 82d is disposed opposite the second concave mirror 40. This allows the display light reflected by the first concave mirror 30 to be incident on the second concave mirror 40, and the display light reflected by the second concave mirror 40 to be emitted toward the projection portion Rwf.

[0068] The fourth opening 82e is disposed opposite the light exit port 70a of the upper case 70C and the cover 70D, and emits the display light reflected by the second concave mirror 40 to the outside of the second internal space 82a toward the projection portion Rwf.

[0069] The second inner case 80B is fixed to the lower case 70A with screws.

[0070] As described above, the vehicle display device 1 of this embodiment can suppress positional deviation of the rotation shaft 53 in a direction intersecting the axis by the first elastic member 55, and can suppress positional deviation of the rotation shaft 53 in the axial direction by the second elastic member 56. In the vehicle display device 1 of this embodiment, the first elastic member 55 is fixed to the lower case 70A via the support member 54, so the function of the first elastic member 55 to suppress positional deviation of the rotation shaft 53 can be maintained. Furthermore, in the vehicle display device 1 of this embodiment, the locking portion 74 of the upper case 70C can keep the fitting portion 56a of the second elastic member 56 and the fitted portion 73 of the lower case 70A in a fitted state (retained state), so the function of the second elastic member 56 to suppress positional deviation of the rotation shaft 53 can be maintained. Therefore, the vehicle display device 1 of this embodiment can maintain the rotating shaft 53 in a specified mounting position relative to the bearing portion 54a, making it suitable for suppressing positional deviation of the rotating shaft 53. This prevents positional deviation of the movable reflecting member (second concave mirror 40) within the housing, thereby suppressing deviation in the virtual image display position.

[0071] Furthermore, in the vehicle display device 1 of this embodiment, the fitting direction of the second elastic member 56 with the fitting portion 73 is aligned with the assembly direction of the upper case 70C with respect to the lower case 70A. Therefore, in the vehicle display device 1 of this embodiment, by assembling the upper case 70C to the lower case 70A, it is possible to create a state in which the second elastic member 56 can be locked by the locking portion 74 of the upper case 70C. [Explanation of symbols]

[0072] 1. Vehicle display device 10 Display Unit 11 Display 20 Plane mirror (reflective material) 30 First concave mirror (reflective member) 40 Second concave mirror (movable reflecting member) 50 Drive Unit 51 Motor 52 Power transmission mechanism 52a 1st input receiving part 52b 2nd input receiving part 53 Rotation axis 53A First rotating shaft 53B Second rotating shaft 53a Protrusion 54 Support member 54a Bearing part 55 First elastic member 56 Second elastic member 56a Fitting part 56b Flexible piece 56b1 shaft insertion groove 70 Outer case 70A lower case 70C upper case 73 Fitted part 74 Locking part Rwf Projection area

Claims

1. an outer case that defines an internal space with a lower case and an upper case assembled together; a display unit that emits display information as display light into the outer case so that the display information can be visually recognized as a virtual image by an occupant in the vehicle interior; one or more reflecting members that reflect the display light emitted from a display of the display unit inside the outer case; a drive unit that rotates one of the reflecting members or one of the plurality of reflecting members as a movable reflecting member around a rotation axis to change a display position of a virtual image; a support member having a groove-shaped bearing portion into which the rotary shaft is fitted and fixed to the lower case; a first elastic member fixed to the support member and configured to apply a resilient force toward the groove bottom of the bearing portion to the rotating shaft, thereby pressing the rotating shaft toward the groove bottom; a second elastic member that restricts axial displacement of the rotation shaft; Equipped with the rotating shaft has a protruding portion protruding from an outer circumferential surface, the second elastic member has a fitting portion that is fitted into the fitted portion of the lower case in a fitting direction perpendicular to the axis of the rotating shaft and is held by the fitted portion, and a flexible piece portion that has a cantilever shape with a free end located closer to the fitting direction than a fixed end provided on the fitting portion side and that has flexibility that allows it to bend and deform in the axial direction of the rotating shaft, When the fitting portion is held by the fitted portion and the rotating shaft is fitted at a specified mounting position relative to the bearing portion, the free end of the flexible piece portion is subjected to a force from the protruding portion and is flexibly deformed, and a reaction force resulting from the flexural deformation acts on the protruding portion, thereby maintaining the rotating shaft at the specified mounting position, The vehicle display device is characterized in that the upper case is provided with a locking portion that locks the mating portion when it moves in the opposite direction to the mating direction, thereby keeping the mating portion held in place relative to the mated portion.

2. the fitting portion is fitted into the fitted portion of the lower case with the fitting direction being aligned with an assembly direction when the upper case is assembled to the lower case, 2. The vehicle display device according to claim 1, wherein the locking portion is positioned opposite the fitting portion that is positioned in the fitting direction relative to the locking portion when the lower case and the upper case are in an assembly completion position.

3. the protruding portion is a flange portion that protrudes concentrically from the outer circumferential surface of the rotating shaft in an annular shape, 2. The vehicle display device according to claim 1, wherein the free end of the flexible piece is provided with a shaft insertion groove into which the rotation shaft is inserted in a direction opposite to the fitting direction.

4. the drive unit includes a motor as a drive source and a power transmission mechanism that operates with the output of the motor; the power transmission mechanism is a power conversion mechanism that converts the output torque of the motor into a linear force, and includes an input unit to which the linear force is input on the movable reflecting member side; 4. The display device for a vehicle according to claim 1, wherein the input-receiving portion is disposed at an eccentric position with respect to the rotation axis.

Images