Head-up display device

Abstract

A head-up display device is provided which can suppress error in the attachment position of a fixed mirror. This head-up display device is provided with a display which emits display light, a first mirror 11 which reflects display light from the display, a second mirror which is provided rotatably about a rotation axis and which reflects towards a window shield the display light reflected by the first mirror 11, a mirror support unit 33 which supports the first mirror 11, a holding case unit 35 which holds the second mirror and which is formed integrally with the mirror support unit 33, and plate springs 40L, 40R, 40C which fix the first mirror 11 to the mirror support unit 33 by pressing the first mirror 11 towards the mirror support unit 33.

Description

[Technical field]

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

[0002] For example, the head-up display device described in Patent Document 1 includes an image light emitting unit that emits image light, a plane mirror that reflects the image light from the image light emitting unit, and a rotatably provided concave mirror that reflects the image light reflected by the plane mirror toward a windshield. As shown in Fig. 2 of Patent Document 1, the plane mirror is held by a holder, and the holder is installed in an internal member of a housing. The internal member of the housing is installed inside a lower member of the housing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-174416 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the configuration of Patent Document 1, the plane mirror is fixed to the lower member of the housing via the holder and the internal member of the housing. In this way, multiple members are interposed between the plane mirror and the lower member of the housing. For this reason, an error is likely to occur in the mounting position of the plane mirror relative to the lower member of the housing.

[0005] The present disclosure has been made in consideration of the above-described circumstances, and has an object to provide a head-up display device that can suppress errors in the mounting position of a fixed mirror. [Means for solving the problem]

[0006] In order to achieve the above object, a head-up display device according to the present disclosure includes: A display that emits display light; a fixed mirror that reflects the display light from the display; a rotating mirror that is rotatable around a rotation axis and that reflects the display light reflected by the fixed mirror toward a projection member; a mirror support portion that supports the fixed mirror; a housing case portion that houses the rotating mirror and is formed integrally with the mirror support portion; a spring that presses the fixed mirror toward the mirror support to fix the fixed mirror to the mirror support; An upper cover attached to the housing case portion; Equipped with 、 the fixed mirror includes a shaft portion located at an end of the fixed mirror, the mirror support portion includes a shaft support portion that supports a side surface of the shaft portion, Among the plurality of springs, the shaft spring is a leaf spring and is provided so as to come into contact with a side surface of the shaft portion and press the shaft portion toward the shaft support portion, The upper cover includes a pressing portion that sandwiches the shaft spring between the upper cover and the shaft portion and presses the shaft spring toward the shaft portion. In addition, the head-up display device according to the present disclosure includes: A display that emits display light; a fixed mirror that reflects the display light from the display; a rotating mirror that is rotatable around a rotation axis and that reflects the display light reflected by the fixed mirror toward a projection member; a mirror support portion that supports the fixed mirror; a housing case portion that houses the rotating mirror and is formed integrally with the mirror support portion; a spring that presses the fixed mirror toward the mirror support to fix the fixed mirror to the mirror support, the fixed mirror includes a shaft portion located at an end of the fixed mirror, the mirror support portion includes a shaft support portion that supports a side surface of the shaft portion, Among the plurality of springs, the shaft spring is a leaf spring and is provided so as to come into contact with a side surface of the shaft portion and press the shaft portion toward the shaft support portion, The shaft support portion is a spring fixing portion to which a fixed end portion of the shaft spring is fixed; and a pressing portion that presses the free end of the shaft spring so that the shaft spring is pressed toward the shaft portion. In addition, the head-up display device according to the present disclosure includes: A display that emits display light; a fixed mirror that reflects the display light from the display; a rotating mirror that is rotatable around a rotation axis and that reflects the display light reflected by the fixed mirror toward a projection member; a mirror support portion that supports the fixed mirror; a housing case portion that houses the rotating mirror and is formed integrally with the mirror support portion; a spring that presses the fixed mirror toward the mirror support to fix the fixed mirror to the mirror support, the fixed mirror includes a positioning portion provided on a back surface of the reflective surface of the fixed mirror and positioned opposite an inner bottom surface of the accommodating case portion, Among the multiple springs, the positioning spring is a leaf spring and is configured to contact the surface opposite to the surface corresponding to the inner bottom surface of the positioning portion and press the positioning portion toward the inner bottom surface of the accommodating case portion. Effect of the Invention

[0007] According to the present disclosure, in a head-up display device, it is possible to suppress errors in the mounting position of a fixed mirror. [Brief description of the drawings]

[0008] [Figure 1] 1 is a schematic cross-sectional view of a head-up display device according to an embodiment of the present disclosure. [Diagram 2] 1 is a perspective view of a head-up display device with an upper cover removed according to an embodiment of the present disclosure. [Diagram 3] 1 is a perspective view of a head-up display device according to an embodiment of the present disclosure with an upper cover and a first mirror removed. FIG. [Figure 4] 1 is a perspective view of a head-up display device with an upper cover removed according to an embodiment of the present disclosure. [Diagram 5] 1 is a side view of a head-up display device according to an embodiment of the present disclosure with an upper cover removed. [Figure 6] 2 is a cross-sectional view of an upper cover, a shaft portion, a shaft support portion, a leaf spring, etc. according to an embodiment of the present disclosure. [Figure 7] 1 is a cross-sectional view of an upper cover, a positioning portion, a spring fixing portion, a leaf spring, etc. according to an embodiment of the present disclosure. [Figure 8] 1 is an enlarged perspective view of a portion of a head-up display device with an upper cover removed according to an embodiment of the present disclosure. FIG. [Figure 9] 11 is an enlarged perspective view of a portion of a head-up display device according to a modified example of the present disclosure with an upper cover removed. FIG. [Figure 10] 13 is a cross-sectional view of a shaft portion, a shaft support portion, a leaf spring, etc. according to a modified example of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An embodiment of a head-up display device according to the present disclosure will be described with reference to the drawings. 1, a head-up display device 10 is mounted on a vehicle and displays a virtual image including vehicle information by projecting display light 16 onto a windshield 19. In the following description, the height direction of the vehicle is defined as the Z direction, the width direction of the vehicle is defined as the X direction, and the front-rear direction of the vehicle is defined as the Y direction.

[0010] As shown in FIG. 1, the head-up display device 10 includes a first mirror 11 which is an example of a fixed mirror, a second mirror 12 which is an example of a rotating mirror, a case 30, a light source 13, a display 14, a control board 15, a mirror rotation drive unit 18, and as shown in FIGS. 2 and 3, leaf springs 40L, 40R, 40C, and screws 41L, 41R, 41C.

[0011] 1, the light source 13 emits illumination light toward the display 14 under the control of a control board 15. The light source 13 includes, for example, a plurality of LEDs (Light Emitting Diodes). The display 14 receives illumination light from the light source 13 and emits display light 16 that represents an image. The display 14 is, for example, a TFT (Thin Film Transistor) type liquid crystal display panel.

[0012] The control board 15 controls the light source 13, the display 14, and the mirror rotation drive unit 18. The control board 15 includes a CPU (Central Processing Unit), a GDC (Graphic Display Controller), a ROM (Read Only Memory), a RAM (Random Access Memory), etc. The control board 15 receives vehicle information from the outside, and emits illumination light from the light source 13 toward the display 14 while displaying an image including the vehicle information on the display 14.

[0013] As shown in Fig. 1, the first mirror 11 reflects the display light 16 from the display 14 toward the second mirror 12. The first mirror 11 is, for example, a concave mirror. When the first mirror 11 is a concave mirror, the impact on the display quality of the virtual image caused by an error in the mounting position within the case 30 is greater than when the first mirror 11 is a plane mirror. Therefore, particularly when the first mirror 11 is a concave mirror, it is required to mount it within the case 30 with higher accuracy. The specific configuration of first mirror 11 will be described later.

[0014] The second mirror 12 is supported in a storage case portion 35 of the case 30, which will be described later, so as to be rotatable about a rotation axis Ax extending along the X direction. The second mirror 12 reflects the display light 16 from the first mirror 11 toward a windshield 19, which is an example of a projected member. The second mirror 12 is, for example, a concave mirror. The second mirror 12 is larger in size in the X direction and the Z direction than the first mirror 11. The windshield 19 reflects the display light 16 from the second mirror 12 toward a viewer, for example, a driver. As a result, a virtual image including vehicle information is displayed on the windshield 19 so as to be visible to the viewer.

[0015] The mirror rotation drive unit 18 rotates the second mirror 12 about the rotation axis Ax under the control of the control board 15. When the second mirror 12 rotates about the rotation axis Ax, the irradiation position of the display light 16 with respect to the viewer can be adjusted in the Z direction.

[0016] As shown in FIG. 1, the case 30 includes a storage case portion 35 , an upper cover 36 , a lower cover 37 , and a mirror support portion 33 . The storage case 35 and the mirror support 33 are integrally formed. This "integrally formed" does not include a case where a plurality of members are fixed together with fixing means such as screws, but refers to a case where the members are formed to be an inseparable integral part at the time of molding in a mold. In other words, the storage case 35 and the mirror support 33 are formed as an integral part without using fixing means such as screws.

[0017] The storage case 35 is made of a light-shielding resin or metal, and supports the second mirror 12, the light source 13, the display 14, and the mirror rotation drive unit 18. The housing case 35 has a housing space 35a that opens upward. The housing space 35a houses the second mirror 12 and the mirror rotation drive unit 18. The second mirror 12 is housed in the housing space 35a so as to be rotatable about a rotation axis Ax. The light source 13 and the display 14 are fixed to the bottom surface of the storage case portion 35. An opening 35b is formed in an inner bottom surface 35c of the storage case portion 35, through which the display light 16 traveling from the display 14 to the first mirror 11 passes. The specific configuration of the mirror support portion 33 will be described later.

[0018] 1, the lower cover 37 is made of light-shielding resin or metal, and is formed so as to cover the lower surface of the storage case portion 35. The lower cover 37 has a storage space 37a that opens upward. When the lower cover 37 is attached to the storage case portion 35, the control board 15, the light source 13, and the display 14 are located within the storage space 37a.

[0019] The upper cover 36 is formed of a light-shielding resin or metal, and is attached to the upper part of the storage case part 35 so as to close the storage space 35a of the storage case part 35. The upper cover 36 is formed in a frame shape having an opening 36a through which the display light 16 passing from the second mirror 12 toward the windshield 19 passes. The upper cover 36 has a light-transmitting plate part 23 that closes the opening 36a so that the display light 16 can pass through, and a shielding part 31 that suppresses the intrusion of external light such as sunlight into the optical path of the display light 16. The shielding part 31 is in the shape of a plate that is inclined so as to approach the downward direction as it approaches the front direction (left direction in FIG. 1). The mirror support part 33 and the first mirror 11 are located between the shielding part 31 and the inner bottom surface 35c of the storage case part 35.

[0020] 6, the upper cover 36 includes a pressing portion 36b that presses the leaf spring 40R toward the shaft portion 11R. The pressing portion 36b has a cylindrical shape that extends along the Z direction. The upper cover 36 includes a pressing portion that presses the leaf spring 40L toward the shaft portion 11L, similar to the pressing portion 36b.

[0021] 7, the upper cover 36 has an opposing portion 36c located above a free end 40Cc (described later) of the leaf spring 40C. The opposing portion 36c has a cylindrical shape that is long in the Z direction. The tip, which is the lower end of the opposing portion 36c, restricts deformation of the leaf spring 40C through contact with the free end 40Cc.

[0022] Next, specific configurations of the first mirror 11, the mirror support portion 33, the housing case portion 35, and the leaf springs 40L, 40R, and 40C will be described with reference to FIGS. 2, the first mirror 11 includes a main body 11A, a pair of shafts 11L and 11R, a positioning portion 11C, and a pair of side walls 11D. The main body 11A is curved along the Y direction and has a rectangular plate shape that is long in the X direction. The main body 11A has a reflective surface 11e that is located on the surface facing the mirror support portion 33 and reflects light. The shafts 11L and 11R, the positioning portion 11C, the side walls 11D, and the back side of the main body 11A are formed of resin.

[0023] The pair of side walls 11D extend in a direction perpendicular to the main body 11A from both ends in the X direction of the main body 11A. Each of the pair of side walls 11D has a right-angled triangular plate shape. The hypotenuse of the side wall 11D is connected to an edge of the main body 11A extending in the Z direction. Each of the pair of side walls 11D extends forward, along which light reflected from the main body 11A by the reflecting surface 11e travels.

[0024] 2 and 3, the pair of shafts 11L, 11R are provided on both ends of the first mirror 11 in the X direction and are supported by shaft supports 38L, 38R (described later) of the mirror support 33. The shafts 11L, 11R are each located at a right-angled corner of the side wall 11D. The pair of shafts 11L, 11R each have a substantially cylindrical shape extending outward along the X direction.

[0025] As shown in FIG. 5, the shaft portion 11R includes a first curved surface 11R1, a second curved surface 11R2, and a third curved surface 11R3. The first curved surface 11R1 is a part of the outer peripheral surface of the shaft portion 11R, and contacts a first surface 38R4 of the shaft support surface 38R3 described later. The second curved surface 11R2 is a part of the outer peripheral surface of the shaft portion 11R, and is located next to the first curved surface 11R1, and contacts a second surface 38R5 of the shaft support surface 38R3 described later. The third curved surface 11R3 is a part of the outer peripheral surface of the shaft portion 11R, and contacts a shaft contact portion 40Rb of the leaf spring 40R described later. The third curved surface 11R3 is located opposite the first curved surface 11R1 and the second curved surface 11R2 in the radial direction of the shaft portion 11R. The first curved surface 11R1 and the second curved surface 11R2 are formed to have the same curvature. The curvatures of the first curved surface 11R1 and the second curved surface 11R2 are set to be larger than the curvature of the third curved surface 11R3.

[0026] As shown in FIG. 4, the positioning portion 11C is a portion for positioning the first mirror 11 in the housing space 35a in the X direction by fitting a positioning pin 34 of the housing case portion 35, which will be described later. The positioning portion 11C is located at the lower end of the main body portion 11A and in the center in the X direction. The positioning portion 11C is located on the back side of the reflecting surface 11e and is in surface contact with the inner bottom surface 35c. The positioning portion 11C is formed with a fitting hole 11C1 into which the positioning pin 34, which will be described later, fits. The inner side surface of the fitting hole 11C1 is positioned so as to sandwich the positioning pin 34 from the X direction. The fitting hole 11C1 is formed as a U-shaped notch that penetrates the positioning portion 11C in the thickness direction and opens toward the rear side in the Y direction.

[0027] As shown in Fig. 4, the housing case 35 includes a positioning pin 34. As shown in Fig. 3, the mirror support 33 includes a frame 33a, a pair of side walls 33b, shaft support portions 38L and 38R, and a spring fixing portion 38C. The frame portion 33a is in the shape of a frame facing the outer periphery of the reflecting surface 11e of the first mirror 11. The frame portion 33a is provided so as to be inclined with respect to the Y direction and the Z direction. The frame portion 33a functions as a parting member that hides the edge portion of the reflecting surface 11e. This suppresses deterioration of the display quality of the virtual image caused by glare at the edge portion of the reflecting surface 11e.

[0028] The pair of side walls 33b are located at both ends of the frame 33a in the X direction and extend in a direction perpendicular to the frame 33a. The pair of side walls 33b are shaped like isosceles triangle plates and face the pair of side walls 11D of the first mirror 11 from the outside in the X direction. The hypotenuses of the side walls 33b are connected to the edges of the frame 33a extending in the Z direction. The bases of the side walls 33b are connected to the inner bottom surface 35c of the storage space 35a of the storage case 35.

[0029] 3, the shaft supports 38L, 38R support the shafts 11L, 11R (see FIG. 2) to position the first mirror 11 in the housing space 35a in the Z and Y directions. The shaft supports 38L, 38R are disposed to sandwich the pair of side walls 33b in the X direction.

[0030] As shown in FIG. 6, the shaft support portion 38R includes a spring fixing portion 38R1 and a shaft support surface 38R3. The spring fixing portion 38R1 has a cylindrical shape extending in the Z direction. A fixed end 40Ra (described later) of the leaf spring 40R is provided on the upper end surface of the spring fixing portion 38R1. A screw hole 38R2 is formed in the upper end surface of the spring fixing portion 38R1. A shaft portion of a screw 41R is screwed into the screw hole 38R2. The screw 41R fixes the fixed end 40Ra (described later) of the leaf spring 40R to the upper end surface of the spring fixing portion 38R1.

[0031] 8, a plurality of claw contact surfaces 38R6 that come into contact with the tips of the claws 40Rd are formed on the outer circumferential surface of the spring fixing portion 38R1. The plurality of claw contact surfaces 38R6, three in this example, are arranged at 90° intervals on the outer periphery of the spring fixing portion 38R1. The claw contact surface 38R6 is a curved surface formed by recessing the outer circumferential surface of the spring fixing portion 38R1, thereby preventing the tip of the claw portion 40Rd from coming off the claw contact surface 38R6.

[0032] As shown in Fig. 6, the shaft support surface 38R3 contacts the outer circumferential surface of the shaft portion 11R at two points. The shaft support surface 38R3 has a first surface 38R4 and a second surface 38R5 which are perpendicular to each other. The first surface 38R4 is flat along the X and Y directions and is in point contact with the first curved surface 11R1 of the shaft portion 11R. The second surface 38R5 is flat along the X and Z directions and is in point contact with the second curved surface 11R2 of the shaft portion 11R. The second surface 38R5 is formed on the outer circumferential surface of the spring fixing portion 38R1.

[0033] As shown in FIG. 8, the shaft support portion 38R includes a spring rotation restricting recess 38R7. The spring rotation restricting recess 38R7 is formed at the upper end of the plate-shaped portion 38R8 that is located between the spring fixing portion 38R1 and the shaft support surface 38R3 and perpendicular to the Y direction. The fixed end 40Ra of the leaf spring 40R fits into the spring rotation restricting recess 38R7. The fixed end 40Ra of the leaf spring 40R comes into contact with both side surfaces of the spring rotation restricting recess 38R7, thereby restricting the rotation of the leaf spring 40R. The shaft support portion 38R has been described above, but the shaft support portion 38L, like the shaft support portion 38R, includes a spring fixing portion 38L1 and a shaft support surface 38L3 as shown in Fig. 4. The fixed end portion 40La of the leaf spring 40L is provided on the upper end surface of the spring fixing portion 38L1. A screw hole into which the shaft portion of the screw 41L is screwed is formed on the upper end surface of the spring fixing portion 38L1.

[0034] As shown in Fig. 4, the spring fixing portion 38C is provided on the inner bottom surface 35c of the accommodation space 35a. The spring fixing portion 38C is located in the center of the mirror support portion 33 in the X direction, on the rear side of the mirror support portion 33 in the Y direction. The spring fixing portion 38C has a cylindrical shape extending in the Z direction. A fixed end portion 40Ca (described later) of a leaf spring 40C is provided on the upper end surface of the spring fixing portion 38C. A screw hole (not shown) is formed on the upper end surface of the spring fixing portion 38C. The shaft portion of a screw 41C is screwed into this screw hole.

[0035] 4, the leaf spring 40R presses the shaft portion 11R of the first mirror 11 toward the shaft support portion 38R. The leaf spring 40L presses the shaft portion 11L of the first mirror 11 toward the shaft support portion 38L. The leaf spring 40C presses the positioning portion 11C of the first mirror 11 toward the inner bottom surface 35c of the accommodation space 35a. In this way, the first mirror 11 is stably supported by the mirror support portion 33 at three points.

[0036] As shown in Fig. 5 and Fig. 6, the leaf spring 40R includes a fixed end 40Ra, a shaft contact portion 40Rb, a free end 40Rc, and a plurality of claw portions 40Rd. The fixed end 40Ra is formed in a plate shape and is installed on the upper end surface of the spring fixing portion 38R1. The fixed end 40Ra has a hole 40Rh (see Fig. 6) through which the shaft portion of the screw 41R can pass. The fixed end 40Ra is sandwiched between the head of the screw 41R and the upper end surface of the spring fixing portion 38R1. As a result, the fixed end 40Ra of the leaf spring 40R is fixed to the upper end surface of the spring fixing portion 38R1.

[0037] As shown in FIG. 8, the claws 40Rd are arranged on the outer periphery of the fixed end 40Ra and hook onto the outer periphery of the spring fixing part 38R1. The claws 40Rd hook onto the outer periphery of the spring fixing part 38R1, so that the fixed end 40Ra of the leaf spring 40R can be temporarily fixed to the spring fixing part 38R1. In this example, the three claws 40Rd are arranged at 90° intervals along the outer periphery of the spring fixing part 38R1. The claws 40Rd are rectangular plate-shaped, elongated in the Z direction. The claws 40Rd are formed so as to be elastically deformable along the radial direction of the fixed end 40Ra. The tips of the claws 40Rd are bent toward the claw contact surface 38R6 of the spring fixing part 38R1. The tips of the claws 40Rd contact the claw contact surface 38R6 of the spring fixing part 38R1.

[0038] 5 and 6, the shaft contact portion 40Rb is inclined so as to approach the first surface 38R4 of the shaft support surface 38R3 as it moves away from the fixed end portion 40Ra. The shaft contact portion 40Rb sandwiches the shaft portion 11R between itself and the shaft support surface 38R3 and presses the shaft portion 11R toward the shaft support surface 38R3. The shaft contact portion 40Rb comes into point contact with the third curved surface 11R3 of the shaft portion 11R.

[0039] The free end 40Rc is located at the end opposite the fixed end 40Ra of the shaft contact portion 40Rb. The free end 40Rc is located lower than the fixed end 40Ra and extends in a direction along the fixed end 40Ra. As shown in FIG. 6, the free end 40Rc is pressed downward by the pressing portion 36b of the upper cover 36. As a result, the shaft contact portion 40Rb is pressed toward the shaft portion 11R with the fixed end 40Ra as a fulcrum. In addition, the pressing portion 36b suppresses deformation of the leaf spring 40R. The leaf springs 40L and 40C have the same configuration as the leaf spring 40R. As shown in Fig. 4, the leaf spring 40L includes a fixed end 40La fixed to the spring fixing portion 38L1 by a screw 41L, a shaft contact portion 40Lb that presses the shaft portion 11L toward the shaft support surface 38L3, a free end 40Lc pressed downward by the pressing portion of the upper cover 36, and a plurality of claw portions that hook onto the spring fixing portion 38L1.

[0040] 4, the leaf spring 40C is provided in a direction perpendicular to the leaf springs 40L and 40R, in other words, in a direction along the back surface of the main body 11A of the first mirror 11. Therefore, in the head-up display device 10, an increase in size of the back surface side of the first mirror 11 is suppressed. As shown in Fig. 7, the leaf spring 40C includes a fixed end 40Ca, a middle portion 40Cb corresponding to the shaft contact portions 40Lb, 40Rb, a free end 40Cc, and a plurality of claw portions 40Cd. The fixed end 40Ca of the leaf spring 40C is fixed to the upper end surface of the spring fixing portion 38C by a screw 41C. The plurality of claw portions 40Cd are hooked on the outer peripheral surface of the tip of the spring fixing portion 38C in a state in which the fixed end 40Ca is installed on the upper end surface of the spring fixing portion 38C. The free end 40Cc is located on the upper surface of the positioning portion 11C and presses the positioning portion 11C toward the inner bottom surface 35c of the accommodation space 35a of the accommodation case portion 35.

[0041] Next, a description will be given of a procedure for assembling the first mirror 11 to the mirror support portion 33. This assembling operation is performed by a worker or a working robot. First, the shafts 11L and 11R of the first mirror 11 are placed on the shaft supports 38L and 38R, respectively, as shown in Fig. 2. At this time, the positioning pin 34 fits into the fitting hole 11C1 of the positioning part 11C, as shown in Fig. 4. This positions the first mirror 11 within the housing space 35a of the housing case part 35.

[0042] Next, the claws 40Rd, 40Cd of the leaf springs 40L, 40R, 40C are hooked in turn onto the tips of the spring fixing parts 38L1, 38R1, 38C. This causes the fixed ends 40La, 40Ra, 40Ca of the leaf springs 40L, 40R, 40C to be temporarily fixed to the spring fixing parts 38L1, 38R1, 38C. In this state, the leaf springs 40L, 40R temporarily fix the shaft parts 11L, 11R to the shaft support parts 38L, 38R, and the leaf spring 40C temporarily fixes the positioning part 11C to the inner bottom surface 35c of the accommodation space 35a. By temporarily fastening the shaft support portions 38L, 38R and the positioning portion 11C, the first mirror 11 is prevented from being fixed in the accommodation space 35a of the accommodation case portion 35 in an inclined state.

[0043] 3 and 4, the leaf springs 40L, 40R, 40C are temporarily fixed to the spring fixing parts 38L1, 38R1, 38C, and then the fixed ends 40La, 40Ra, 40Ca of the leaf springs 40L, 40R, 40C are fixed to the tip faces of the spring fixing parts 38L1, 38R1, 38C by the screws 41L, 41R, 41C. As a result, the first mirror 11 is fixed within the accommodation space 35a of the accommodation case part 35. With the above, the assembly of the first mirror 11 to the mirror support portion 33 is completed.

[0044] (effect) According to the embodiment described above, the following effects are achieved. (1) The head-up display device 10 includes a display 14 that emits display light 16, a first mirror 11 that is an example of a fixed mirror that reflects the display light 16 from the display 14, a second mirror 12 that is an example of a rotating mirror that is rotatable about a rotation axis Ax and reflects the display light 16 reflected by the first mirror 11 toward a windshield 19 that is an example of a projected member, a mirror support portion 33 that fixedly supports the first mirror 11, a storage case portion 35 that houses the second mirror 12 and is formed integrally with the mirror support portion 33, and leaf springs 40L, 40R, 40C that are an example of a spring that fixes the first mirror 11 to the mirror support portion 33 by pressing the first mirror 11 toward the mirror support portion 33. According to this configuration, the first mirror 11 is directly supported by the mirror support part 33 which is formed integrally with the housing case part 35. Therefore, no other members are interposed between the first mirror 11 and the housing case part 35. This prevents errors in the mounting position of the first mirror 11 relative to the housing case part 35 from occurring. This prevents a decrease in the display quality of the virtual image. Also, the number of parts of the head-up display device 10 can be reduced. Furthermore, the mirror support 33 is located in the direction in which the reflective surface 11e of the first mirror 11 faces. Therefore, it is not necessary to provide a mirror support on the rear side opposite to the reflective surface 11e of the first mirror 11. This makes it possible to configure the head-up display device 10 more compactly.

[0045] (2) The first mirror 11 is provided with an axis portion 11R that is located at an end portion in the longitudinal direction (X direction) of the first mirror 11 and extends along the X direction. The mirror support portion 33 is provided with an axis support portion 38R that supports a side surface of the axis portion 11R. A leaf spring 40R, which is an example of an axis spring, is provided so as to come into contact with a side surface of the axis portion 11R and press the axis portion 11R toward the axis support portion 38R. According to this configuration, the leaf spring 40R presses the shaft portion 11R, thereby preventing distortion of the reflecting surface 11e of the first mirror 11. Therefore, deterioration in the display quality of the virtual image is prevented.

[0046] (3) The head-up display device 10 includes an upper cover 36 that is attached to the housing case portion 35. The upper cover 36 includes a pressing portion 36b that sandwiches the leaf spring 40R between the upper cover 36 and the shaft portion 11R and presses the leaf spring 40R toward the shaft portion 11R. According to this configuration, simply by attaching the upper cover 36 to the housing case portion 35, the leaf spring 40R is pressed by the pressing portion 36b, and the shaft portion 11R is fixed to the shaft support portion 38R.

[0047] (4) The first mirror 11 includes a positioning portion 11C that is provided on the back side of the reflective surface 11e of the first mirror 11 and is positioned opposite the inner bottom surface 35c of the storage case portion 35. The leaf spring 40C, which is an example of a positioning spring, is provided in contact with an upper surface of the positioning portion 11C opposite to the surface corresponding to the inner bottom surface 35c and presses the positioning portion 11C toward the inner bottom surface 35c of the storage case portion 35. According to this configuration, since the positioning portion 11C is provided on the rear surface side of the first mirror 11, the positioning portion 11C does not obstruct the optical path of the display light 16.

[0048] (5) The housing case 35 includes columnar spring fixing portions 38L1, 38R1, and 38C. The leaf springs 40L, 40R, and 40C include a plurality of claw portions 40Rd, 40Cd that are arranged around the ends of the spring fixing portions 38L1, 38R1, and 38C so as to hook onto the ends of the spring fixing portions 38L1, 38R1, and 38C. According to this configuration, the leaf springs 40L, 40R, and 40C can be easily and temporarily fixed to the tips of the spring fixing parts 38L1, 38R1, and 38C. This prevents the first mirror 11 from being fixed in the accommodation space 35a of the accommodation case part 35 in an inclined state.

[0049] (6) The shaft support portion 38R has a spring rotation restricting recess 38R7 into which the fixed end 40Ra of the leaf spring 40R fits. According to this configuration, the fixed end 40Ra of the leaf spring 40R comes into contact with both side surfaces of the spring rotation restricting recess 38R7, thereby restricting the leaf spring 40R from rotating about the screw 41R.

[0050] The present disclosure is not limited to the above-described embodiments and drawings. Modifications (including deletion of components) can be made as appropriate within the scope of the present disclosure. An example of a modification will be described below.

[0051] (Modification) In the above embodiment, the upper cover 36 includes a pressing portion 36b that presses the leaf spring 40R toward the shaft portion 11R, but this pressing portion may be provided on the shaft support portion 38R instead of the upper cover 36. In this modification, for example, as shown in Figures 9 and 10, the shaft support portion 38R includes a spring fixing portion 38R1 to which a fixed end portion 40Ra of the leaf spring 40R, which is an example of a shaft spring, is fixed, and a pressing portion 38R9 that presses the free end portion 40Rc of the leaf spring 40R so as to press the leaf spring 40R toward the shaft portion 11R. The pressing portion 38R9 is formed on the first surface 38R4 of the shaft support surface 38R3. The pressing portion 38R9 has an insertion hole 38Rh into which the free end portion 40Rc of the leaf spring 40R can be inserted. The insertion hole 38Rh has a hole penetrating in the Y direction. The free end portion 40Rc of the leaf spring 40R comes into contact with the upper surface of the insertion hole 38Rh. As a result, the pressing portion 38R9 presses down the free end portion 40Rc of the leaf spring 40R from above. Next, a method of assembling the leaf spring 40R to the shaft support portion 38R will be described. After the shaft 11R of the first mirror 11 is placed on the shaft support surface 38R3 of the shaft support portion 38R, the free end portion 40Rc of the leaf spring 40R is inserted into the insertion hole portion 38Rh of the pressing portion 38R9 while the claw portion 40Rd of the leaf spring 40R is hooked onto the tip of the spring fixing portion 38R1. Then, the fixed end portion 40Ra of the spring 40R is fixed to the spring fixing portion 38R1 with a screw 41R. For example, when multiple parts are involved in holding the leaf spring 40R, the dimensional tolerances of the multiple parts are accumulated, which tends to cause variation in the holding force of the leaf spring 40R to hold the shaft portion 11R. On the other hand, according to this modified example, the pressing portion 38R9 is provided on the shaft support portion 38R, so that the leaf spring 40R can be stably held by only the shaft support portion 38R, which is one part. Therefore, variation is unlikely to occur in the holding force of the leaf spring 40R to hold the shaft portion 11R. In addition, since the free end portion 40Rc of the leaf spring 40R is held by the pressing portion 38R9 before the upper cover 36 is attached to the housing case portion 35, the free end portion 40Rc of the leaf spring 40R is prevented from hindering the assembly of the head-up display device 10. Similarly to the shaft support portion 38R of this modified example, the shaft support portion 38L may be provided with a pressing portion that presses the free end portion of the leaf spring 40L so that the leaf spring 40L is pressed toward the shaft portion 11L.

[0052] In the above embodiment, both the first mirror 11 and the second mirror 12 are concave mirrors, but this is not limiting, and at least one of the first mirror 11 and the second mirror 12 may be a plane mirror.

[0053] In the above embodiment, the projection member is the windshield 19, but may be a dedicated combiner. The head-up display device 10 may be mounted not only on a vehicle but also on other vehicles such as an airplane, a ship, etc.

[0054] In the above embodiment, the display 14 is, for example, a TFT-type liquid crystal display panel, but is not limited to this and may be configured to include a MEMS (Micro Electro Mechanical System) or a DMD (Digital Micro-mirror Device).

[0055] In the above embodiment, the free ends 40Lc, 40Rc of the leaf springs 40L, 40R may be omitted. In this case, the pressing portion 36b of the upper cover 36 may be formed to press the shaft contact portions 40Lb, 40Rb of the leaf springs 40L, 40R toward the shaft portions 11L, 11R. Furthermore, the pressing portion 36b of the upper cover 36 may be omitted. Furthermore, the facing portion 36c of the upper cover 36 may press the free end portion 40Cc of the leaf spring 40C toward the positioning portion 11C, or may press the middle portion 40Cb of the leaf spring 40C downward.

[0056] In the above embodiment, any one or two of the leaf springs 40L, 40R, and 40C may be omitted. Furthermore, the mirror support 33 may support not only the shafts 11L and 11R of the first mirror 11 but also the back surface of the first mirror 11. In this case, the leaf spring may press the outer periphery of the reflective surface 11e of the first mirror 11 toward the mirror support 33. In the above embodiment, the claw portions 40Rd, 40Cd of the leaf springs 40L, 40R, 40C may be omitted. Furthermore, the leaf springs 40L, 40R, 40C may be springs of a type other than leaf springs. [Explanation of symbols]

[0057] 10 Head-up display device 11 Mirror No. 1 11A Main unit 11C Positioning part 11D Side wall section 11C1 Fitting hole 11L,11R Shaft part 11R1 1st curved surface 11R2 2nd curved surface 11R3 3rd curved surface 11e reflective surface 12 2nd Mirror 13 Light source 14 Display 15 Control Board 16 display light 18 Mirror rotation drive unit 19 Windshield 23 Light transmitting plate part 30 cases 31 Shielding part 33 Mirror support 33a Frame 33b Side wall part 34 Locating pin 35 Storage case section 35a Storage space 35b,36a opening 35c Inner bottom surface 36 Top cover 36b Pressing part 36c Opposite part 37 Lower cover 37a Containment Space 38C, 38L1, 38R1 Spring fixing part 38L,38R Shaft support part 38L3,38R3 Shaft support surface 38R2 screw hole 38R4 1st page 38R5 2nd side 38R6 Claw contact surface 38R7 Spring rotation restriction recess 38R8 Plate-shaped part 38R9 Pressing part 38Rh Insertion hole 40C, 40L, 40R leaf spring 40Ca,40La,40Ra Fixed end 40Cb middle part 40Cc,40Lc,40Rc Free end 40Cd,40Rd Claw part 40Lb,40Rb Shaft contact part 40Rh hole 41C, 41L, 41R screws Ax Rotation axis

Claims

1. A display that emits display light; a fixed mirror that reflects the display light from the display; a rotating mirror that is rotatable around a rotation axis and that reflects the display light reflected by the fixed mirror toward a projection member; a mirror support portion that supports the fixed mirror; a housing case portion that houses the rotating mirror and is formed integrally with the mirror support portion; a spring that presses the fixed mirror toward the mirror support to fix the fixed mirror to the mirror support; an upper cover attached to the storage case portion; the fixed mirror includes a shaft portion located at an end of the fixed mirror, the mirror support portion includes a shaft support portion that supports a side surface of the shaft portion, Among the plurality of springs, the shaft spring is a leaf spring and is provided so as to come into contact with a side surface of the shaft portion and press the shaft portion toward the shaft support portion, The upper cover includes a pressing portion that sandwiches the shaft spring between the upper cover and the shaft portion and presses the shaft spring toward the shaft portion. Head-up display device.

2. A display that emits display light; a fixed mirror that reflects the display light from the display; a rotating mirror that is rotatable around a rotation axis and that reflects the display light reflected by the fixed mirror toward a projection member; a mirror support portion that supports the fixed mirror; a housing case portion that houses the rotating mirror and is formed integrally with the mirror support portion; a spring that presses the fixed mirror toward the mirror support to fix the fixed mirror to the mirror support, the fixed mirror includes a shaft portion located at an end of the fixed mirror, the mirror support portion includes a shaft support portion that supports a side surface of the shaft portion, Among the plurality of springs, the shaft spring is a leaf spring and is provided so as to come into contact with a side surface of the shaft portion and press the shaft portion toward the shaft support portion, The shaft support portion is a spring fixing portion to which a fixed end portion of the shaft spring is fixed; A pressing portion that presses a free end of the shaft spring so that the shaft spring is pressed toward the shaft portion. Head-up display device.

3. A display that emits display light; a fixed mirror that reflects the display light from the display; a rotating mirror that is rotatable around a rotation axis and that reflects the display light reflected by the fixed mirror toward a projection member; a mirror support portion that supports the fixed mirror; a housing case portion that houses the rotating mirror and is formed integrally with the mirror support portion; a spring that presses the fixed mirror toward the mirror support to fix the fixed mirror to the mirror support, the fixed mirror includes a positioning portion provided on a back surface of the reflective surface of the fixed mirror and positioned opposite an inner bottom surface of the accommodating case portion, Among the plurality of springs, a positioning spring is a leaf spring, and is provided so as to contact a surface of the positioning portion opposite to a surface corresponding to the inner bottom surface and to press the positioning portion toward the inner bottom surface of the storage case portion. Head-up display device.

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