JP6973940B2 - Projection device - Google Patents

Description

The present invention relates to a projection device used as a head-up display device or the like, and capable of adjusting the angle of a mirror that reflects light including an image generated by an image generation unit.

Patent Document 1 describes an invention relating to a head-up display device. This head-up display device has an image output device, a plane mirror that reflects an image from the image output device, and a magnifying mirror that magnifies the image reflected by the plane mirror and reflects it toward the front windshield. The virtual image reflected by the front windshield is visible to the occupants of the vehicle.

The following description is given in paragraphs "0053" to "0055" of Patent Document 1. By rotationally driving the magnifying glass and adjusting its reflection angle, it may be possible to avoid deterioration of the virtual image display state due to dimensional errors and mounting errors of the front windshield. However, the movable range of the magnifying glass is limited, and the display state of the virtual image may not be adjusted even if the magnifying glass is rotationally driven. Further, even if the display state of the virtual image can be adjusted within the movable range of the magnifying glass, the display position of the virtual image may deviate from the position preferred by the occupant. Then, in order to solve this problem, it has been proposed to provide an adjusting device for the plane mirror, change the rotation position of the plane mirror, and adjust the optical axis of the optical system with respect to the front windshield.

FIG. 2 of Patent Document 1 shows a plane mirror and an adjusting device for rotating the plane mirror. This adjusting device has two drive units, and each drive unit has a conversion mechanism that converts the rotational force of the electric motor and the electric motor into linear motion. As described in paragraph "0057", in the adjustment work, in the adjustment work, an external device is connected to the adjustment device, the drive unit is operated by a drive signal from the external device, and the plane mirror is run along the long side and the short side of the plane mirror. It is possible to change the optical axis of the light reflected by the plane mirror by rotating it around the rotation axis.

Japanese Unexamined Patent Publication No. 2011-203680

In the head-up display device described in Patent Document 1, two drive units including an electric motor are used as an adjusting device for adjusting the rotational position of the plane mirror. This adjusting device has a complicated structure and high manufacturing cost, and an external device for operating the adjusting device is required, and the equipment for adjusting the plane mirror is too large. Further, although the adjusting device can rotate the plane mirror around two rotation axes, there is no description of a means for firmly fixing the plane mirror after the adjustment is completed.

The present invention solves the above-mentioned conventional problems, and the angle of the mirror can be easily adjusted with a relatively simple structure, and after the adjustment, the mirror is firmly and stably fixed without changing the angle. It is intended to provide a projection device capable of performing.

The present invention relates to a projection apparatus having an image generation unit and a mirror that reflects light including an image generated by the image generation unit.
A holding member for holding the mirror and a support base for supporting the holding member are provided, and a tilting support portion is provided between the support base and the holding member.
In the tilting support portion, the holding member is provided with a tilting protrusion, and the support base is provided with a support recess with which the tilting protrusion abuts, and the tilting protrusion and the support recess are contacted by a spherical sliding portion. A concave spherical surface that is in contact with the tilting protrusion and faces the mirror is formed with a concave spherical surface that shares the center with the spherical sliding portion.
A fixing member having a pressing portion and a screw shaft is provided, the pressing portion abuts on the concave spherical surface, the screw shaft penetrates the tilting protrusion and the support recess, and the front portion of the support base is provided. It extends to the back on the opposite side of the
In a state where the angle of the holding member is adjusted by sliding of the spherical sliding portion, the pressing portion is pressed against the concave spherical surface by the fastening force of the screw shaft, and the holding member becomes the support base. It is characterized by being fixed.

In the projection device of the present invention, it is preferable that the surface of the pressing portion that comes into contact with the concave spherical surface has a convex spherical surface having the same curvature as the concave spherical surface.

It is preferable that the projection device of the present invention is provided with an adjusting mechanism for changing the angle of the holding member between the support base and the holding member.

In the projection device of the present invention, the adjusting mechanism is provided at least in two places, the adjusting screw is inserted from the back into the support base and screwed to the holding member, and the adjusting screw is provided. It can be configured to have an urging member that urges the holding member in a direction away from the support base at the portion.

In the projection device of the present invention, it is preferable that the tilting center of the holding member, which is the common center of the spherical sliding portion and the concave spherical surface, coincides with the reflecting surface of the mirror.

Further, in the projection device of the present invention, the holding member is made of a sheet metal material, and the sheet metal material is pressure-deformed to form the tilting protrusion, and the tilting protrusion is formed on the surface of the tilting protrusion facing the support recess. It is preferable that the spherical sliding portion is formed and the concave spherical surface is formed on the surface of the front portion of the tilting protrusion.

The projection device of the present invention is used as a head-up display device, for example, provided with a magnifying mirror that directs light including an image reflected by the mirror toward a transmissive screen located in front of the driver's seat of the vehicle. Is.

The projection device of the present invention has a tilting support portion, and in the tilting support portion, a tilting protrusion provided on a holding member holding a mirror and a supporting recess provided on a support base slide spherically. It has a part and slides. Therefore, it is possible to adjust the holding member and the mirror so as to have a tilt center of the tilt support portion and tilt. Further, since a concave spherical surface is provided at the front portion of the tilting protrusion, the concave spherical surface is pressed against the support base by the pressing portion of the fixing member, and the holding member is fixed to the support base, what is the angle of the holding member? Even if it changes in this way, it is possible to stably and firmly fix the holding member to the support base.

An explanatory view showing a state in which a head-up display device, which is a projection device according to an embodiment of the present invention, is mounted on a vehicle. A perspective view showing a flat mirror, a holding member, and a support base provided in the head-up display device shown in FIG. 1 from the front. An exploded perspective view showing a flat mirror, a holding member, and a support base provided in the head-up display device shown in FIG. 1 from the rear. The structure of the tilting support portion provided between the support base and the holding member is shown, and FIG. 3 is a cross-sectional view taken along the line IV-IV. It shows a part of the adjustment mechanism provided between the support base and the holding member, and is a cross-sectional view of FIG. 3 cut along a VV line. A cross-sectional view of the same portion as in FIG. 4, showing the tilting support portion of the second embodiment of the present invention. A cross-sectional view of the same portion as in FIG. 4, showing the tilting support portion of the third embodiment of the present invention. A cross-sectional view of the same portion as in FIG. 4, showing the tilting support portion of the fourth embodiment of the present invention.

FIG. 1 shows a structure in which the projection device 10 according to the embodiment of the present invention is used as a head-up display device and mounted on an automobile 1.

In the head-up display device, the windshield glass 2 located in front of the automobile 1 functions as a transmissive screen having a concave curved surface. A driver's seat 3 is provided in the vehicle interior space, and a steering wheel 4 is provided in front of the driver's seat 3. A projection device 10 is embedded in a dash board or an instrument panel in front of the steering wheel 4.

The projection device 10 has a housing 11. An image generation unit 12 is provided inside the housing 11. The image generation unit 12 has a light source such as an LED and a transmissive TFT liquid crystal panel. The image generation unit 12 may be provided with a transmissive liquid crystal panel having a structure other than the TFT liquid crystal panel, or may be provided with a projection type LCOS element other than the liquid crystal panel. The light L1 including the image generated by the image generation unit 12 is given to the mirror unit 20 having the reflecting surface 21a of the plane mirror, and the reflected light L2 reflected by the reflecting surface 21a is given to the magnifying mirror 13. The magnifying glass 13 is a concave mirror, and the reflected light L2 including the image is magnified and given as the projected light L3 to the inner surface of the windshield glass 2.

The projected light L3 is semi-reflected on the inner surface of the windshield glass 2 that functions as a transmissive screen, and is visually recognized by the driver 5. As a result, the driver 5 can see the virtual image V formed in front of the windshield glass 2. The driver 5 can obtain vehicle speed information and navigation information from the virtual image V. In the head-up display device, a combiner is installed in front of the driver's seat 3 as a transmissive screen, and the projected light L3 is given to the combiner and semi-reflected toward the driver 5, and the driver 5 is in front of the combiner. The virtual image V formed on the image may be visible.

2 and 3 show the structure of the mirror unit 20. In each of the drawings below FIG. 2, the mirror unit 20 is in the front in the Z1 direction and in the rear in the Z2 direction. In FIG. 1, the Z1 direction substantially coincides with the direction in which the reflected light L2 travels from the mirror unit 20 toward the magnifying glass 13. The X1 direction is the left direction, the X2 direction is the right direction, the Y1 direction is the upward direction, and the Y2 direction is the downward direction.

As shown in FIGS. 2 and 3, the mirror unit 20 has a planar mirror 21. The plane mirror 21 has a reflecting surface 21a facing forward (Z1 direction) and a back surface 21b facing backward (Z2 direction). The plane mirror 21 is held by the holding member 22. The holding member 22 is press-molded (pressure-formed) with a sheet metal material such as a rolled steel plate, a stainless steel plate, an aluminum plate, or an aluminum alloy plate. The back surface 21b of the flat mirror 21 is adhesively fixed to the front portion 22a of the holding member 22 with an adhesive. The holding member 22 holding the plane mirror 21 is supported by the support base 23 so that the angle of the reflecting surface 21a can be changed. The support base 23 is die-cast molded from an aluminum alloy or the like, or injection-molded from a synthetic resin material. The support base 23 is fixed inside the housing 11 of the projection device 10.

A tilting support portion (tilting sliding portion) 30 is provided between the holding member 22 and the support base 23. The holding member 22 holding the flat mirror 21 has a tilting center in the tilting support portion 30, and is supported by the support base 23 so as to be tiltably adjustable. As shown in FIG. 2, the reflection surface 21a of the plane mirror 21 has a rectangular shape (rectangular shape), and the tilt center (tilt fulcrum) P by the tilt support portion 30 coincides with the center (figure center) of the reflection surface 21a. ing.

FIG. 4 shows a cross-sectional view of the structure of the tilting support portion 30.
In the tilting support portion 30, a tilting protrusion portion (supported protrusion) 31 having a protrusion shape toward the rear (Z2 direction) is integrally formed with the holding member 22, and the tilting protrusion portion (supported protrusion) 31 is integrally formed in front of the support base 23 (Z1 direction). A support recess 35 that is recessed toward the rear is formed in the front portion 23a facing toward the rear. The tilting protrusion 31 is formed by pressing the sheet metal material forming the holding member 22 toward the rear (Z2 direction) in the pressing process. The surface of the tilting protrusion 31 facing the support recess 35 is a spherical sliding portion 33, and the concave spherical surface 32 is formed on the front portion of the tilting protrusion 31 facing the flat mirror 21. Since the tilting protrusion 31 has a constant plate thickness dimension, the spherical sliding portion 33 having a radius R1 and the concave spherical surface 32 having a radius R2 have a common center. As shown in FIG. 4, the common center of the spherical sliding portion 33 and the concave spherical surface 32 is located on the reflecting surface 21a of the plane mirror 21, and this center is the tilt center (tilting fulcrum) P of the reflecting surface 21a. Become. The tilting protrusion 31 is formed with an opening 34 at the top of the spherical sliding portion 33.

Since the holding member 22 is made of a sheet metal material and the tilting protrusion 31 is pressure-molded in the press process, the spherical sliding portion 33 and the concave spherical surface 32 having a common center can be made high by a simple processing process. It can be formed with accurate dimensions.

A tapered sliding surface 36 is formed on the surface of the support recess 35 formed in the support base 23. FIG. 4 shows a center line O passing through the tilt center P. The tapered sliding surface 36 has a rotationally symmetric shape centered on the center line O. In the embodiment shown in FIG. 4, the center line O extends in the direction perpendicular to the surface of the front portion 23a of the support base 23 (Z1-Z2 direction). On the back of the support base 23, a seat surface 38 is formed behind the support recess 35. The seat surface 38 is a flat surface, perpendicular to the center line O, and formed parallel to the surface of the front portion 23a. An insertion hole 37 penetrating the support base 23 is formed in the center of the seat surface 38, and the center of the insertion hole 37 coincides with the center line O.

A fixing member 40 is provided on the tilting support portion 30. The fixing member 40 is made of a metal material such as iron, and the pressing portion 41 and the screw shaft 42 are integrally formed. The pressing portion 41 is formed with a pressing surface 41a facing rearward (Z2 direction). The pressing surface 41a is a convex spherical surface having the same curvature as the concave spherical surface 32. The screw shaft 42 integrally extends rearward from the top of the convex spherical surface of the pressing surface 41a. A male screw 42a is machined on the outer surface of the screw shaft 42. The pressing portion 41 of the fixing member 40 is located inside the concave spherical surface 32 of the tilting protrusion 31, and the screw shaft 42 has an opening 34 formed in the tilting protrusion 31 and an insertion hole 37 formed in the support recess 35. It penetrates and extends backward (Z2 direction). The opening 34 formed in the tilting protrusion 31 is a hole having a circular cross section, and its inner diameter is sufficiently larger than the diameter of the screw shaft 42.

As shown in FIG. 4, the washer 43 and the spring washer 44 are inserted into the screw shaft 42 extending rearward from the insertion hole 37 of the support base 23, and the nut 45, which is a fastening member, is screwed to the male screw 42a of the screw shaft 42. Has been done. The center of the screw shaft 42 coincides with the center line O.

An adjusting mechanism 50 is provided between the holding member 22 and the support base 23. The adjusting mechanism 50 is composed of two adjusting screws 51x and 51y and an urging member 52. As shown in FIG. 3, adjustment holes 53 are formed at two locations on the support base 23. As shown in an enlarged manner in FIG. 5, at two places of the holding member 22, a part of the sheet metal material constituting the holding member 22 is cut up and adjusted toward the rear (Z2 direction). A support piece 54 is formed, and a female screw hole 54a is formed in each of the adjustment support pieces 54. As shown in FIG. 5, the adjusting screw 51y is inserted into the washer 55, further inserted into the adjusting hole 53, and screwed into the male screw hole 54a of the adjusting support piece 54. Similarly, the adjusting screw 51x is also inserted into the washer 55 and the adjusting hole 53 and screwed into the female screw hole 54a.

As shown in FIG. 2, the urging member 52 constituting the adjusting mechanism 50 is a leaf spring. The base portion 52a of the urging member 52 is fixed to the pedestal portion 56 integrally formed at the lower part of the front portion 23a of the support base 23 by means such as screwing or bonding. The lower portion of the front portion 22a of the holding member 22 is pressed toward the rear (Z2 direction) by the front portion 52b of the urging member 52. In FIG. 2, the pressing force applied from the urging member 52 to the front portion 22a is indicated by an arrow F. When the pressing force F acts on the holding member 22 from the urging member 52, the holding member 22 is attached in the direction away from the support base 23 with the tilting support portion 30 as a fulcrum at the portion where the adjusting screws 51x and 51y are provided. Being forced. This urging force regulates the rattling of the holding member 22 before the nut 45 is tightened in the tilting support portion 30. Instead of the leaf spring urging member 52 shown in FIG. 2, a compression coil spring is arranged on the outer circumference of the adjusting screws 51x and 51y and between the support base 23 and the adjusting support piece 54, and the compression coil is arranged. A spring may be used as an urging member.

Next, the assembly work and the adjustment work of the mirror unit 20 will be described.
In the assembly work of the mirror unit 20, as shown in FIG. 4, in the state before the flat mirror 21 is fixed to the holding member 22, the screw shaft 42 of the fixing member 40 is connected to the opening 34 of the tilting protrusion 31. The washer 43 and the spring washer 44 are attached to the screw shaft 42 protruding from the seat surface 38 by inserting it into the insertion hole 37 of the support base 23, and the nut 45 is screwed. Further, the adjusting screws 51x and 51y are inserted into the adjusting holes 53 of the support base 23 and screwed into the female screw holes 54a formed in the adjusting support piece 54. Further, as shown in FIG. 2, a leaf spring urging member 52 is attached, and a pressing force F is applied to the holding member 22. At some point after the screw shaft 42 of the fixing member 40 is inserted through the opening 34, the flat mirror 21 is adhered to and fixed to the holding member 22.

In the tilting support portion 30, the angle of the reflecting surface 21a of the flat mirror 21 is adjusted while the spherical sliding portion 33 of the tilting protrusion 31 is in contact with the tapered sliding surface 36 of the support recess 35 and the nut 45 is not strongly tightened. Is done. Since the pressing force F of the urging member 52 regulates the rattling of the adjusting screws 51x and 51y at the screwed portions, by tightening or loosening the adjusting screws 51x, the Y0 axis, which is a virtual axis, is used as the center. The holding member 22 can be rotated, and by tightening or loosening the adjusting screw 51y, the holding member 22 can be rotated around the X0 axis, which is also a virtual axis.

When the holding member 22 is rotated by the rotation of the adjusting screws 51x and 51y and the angle of the reflecting surface 21a of the flat mirror 21 is adjusted to an appropriate direction, the nut 45 which is the fastening member shown in FIG. 4 is tightened. .. When the nut 45 is tightened, the pressing surface 41a of the pressing portion 41 of the fixing member 40 is pressed against the concave spherical surface 32 of the tilting protrusion 31 by the tightening force f in the direction along the center line O, and the spherical sliding portion 33 is pressed. The holding member 22 after adjustment is fixed to the support base 23 by being pressed against the tapered sliding surface 36.

As shown in FIG. 1, by adjusting the angle of the reflecting surface 21a of the plane mirror 21 in the mirror unit 20 provided in the projection device 10, the direction of the optical axis of the reflected light L2 can be adjusted, and as a result, the driver. The position of the virtual image V visually observed from 5 can be adjusted from the unfavorable position Va indicated by the broken line to a position that is easy to see.

As shown in FIG. 4, the centers of the spherical sliding portion 33 and the concave spherical surface 32 of the tilting support portion 30 coincide with the reflecting surface 21a of the plane mirror 21, and this center is the tilting center P of the reflecting surface 21a. .. The tilt center P coincides with the center (center of the figure) of the planar shape of the reflection surface 21a.

Since the flat mirror 21 is tilted with the tilt center P located at the center (center of the figure) of the reflective surface 21a on its surface as a fulcrum, the reflected light L2 reflected from the reflective surface 21a due to the change in the tilt of the reflective surface 21a. Easy to adjust the direction of the optical axis. Further, since the plane mirror 21 is tilted with the tilting center P located at the center (center of the figure) of the reflecting surface 21a as a fulcrum, the length of the optical axis of the optical system changes when the angle of the reflecting surface 21a is adjusted. It becomes smaller. Therefore, by adjusting the tilt of the plane mirror 21, it is possible to suppress the image formation position of the virtual image V shown in FIG. 1 from fluctuating in the front-back direction of the line of sight. On the other hand, in the head-up display device described in Patent Document 1, the plane mirror is adjusted by rotating it around a rotation axis along the long side and the short side of the plane mirror. This structure has a drawback that the position of the central portion of the plane mirror moves in the front-rear direction due to the change in the angle of the plane mirror, and the length of the optical axis of the light reflected by the plane mirror fluctuates.

In the adjusting mechanism 50, the adjusting screw 51x is located behind the virtual rotation axis X0 extending in the X direction through the tilting center P, and the adjusting screw 51y extends in the Y direction through the tilting center P. It is located behind Y0, and when viewed from the front, the adjustment point of the adjustment screw 51x coincides with the rotation axis X0, and the adjustment point of the adjustment screw 51y coincides with the rotation axis Y0. Therefore, when the adjusting screw 51x is rotated, the reflective surface 21a can be rotated about the rotation axis Y0 without the action of a twisting force or the like, and when the adjusting screw 51y is rotated, it can be rotated. The reflective surface 21a can be rotated about the rotation axis X0 without any twisting force or the like acting on the reflective surface 21a.

In the tilting support portion 30 shown in FIG. 4, the spherical sliding portion 33 of the tilting protrusion 31 and the taper of the support recess 35 are tapered regardless of the angle at which the holding member 22 and the flat mirror 21 change with the tilting center P as a fulcrum. The contact position with the sliding surface 36 does not change, and the pressing surface 41a of the pressing portion 41 of the fixing member 40 and the concave spherical surface 32 of the tilting protrusion 31 always come into contact with each other on a spherical surface centered on the tilting center P. Therefore, the tilting protrusion 31 can be stably sandwiched between the pressing portion 41 and the tapered sliding surface 36 by the tightening force f acting along the center line O when the nut 45 is tightened, and external vibration acts. When the adjustment is made, the phenomenon that the orientation of the holding member 22 and the plane mirror 21 after adjustment is not correct is less likely to occur.

A structure in which the tilting support portion 30 does not have a fixing function but the adjusting mechanism 50 has a fixing function is conceivable, but in that case, the holding member 22 is distorted by the fixing function, and the distortion is caused by the plane mirror 21. There is a risk that the projected image will be distorted. On the other hand, since the present embodiment is fixed at one point in the central portion of the holding member 22, the holding member 22 has an advantage that distortion does not occur.

Next, the structure of the tilting support portion of another embodiment of the present invention will be described. Hereinafter, the members exhibiting the same functions as those of the embodiment shown in FIG. 4 will be described with the same reference numerals.

In the tilting support portion 130 of the second embodiment shown in FIG. 6, the pressing portion 41 of the fixing member 40 has a disk shape, and the protruding curved surface portion 41b around the disk abuts on the concave spherical surface 32 of the tilting protrusion 31. ing. The contact state between the spherical sliding portion 33 of the tilting protrusion 31 and the tapered sliding surface 36 of the support recess 35 is the same as that of the embodiment shown in FIG.

In the tilting support portion 130 shown in FIG. 6, the disk-shaped pressing portion 41 is oriented perpendicular to the center line O, and the pressing portion does not change the angle between the holding member 22 and the flat mirror 21. The position of the contact portion between the 41 and the concave spherical surface 32 does not change. That is, the contact portion between the pressing portion 41 and the concave spherical surface 32 is located in a plane perpendicular to the center line O and coincides with an arc centered on the center line O. Therefore, no matter how the angle between the holding member 22 and the flat mirror 21 changes, the tilting protrusion 31 can be stably pressed and fixed to the support recess 35 by the tightening force f when the nut 45 is tightened. can.

In the embodiment shown in FIG. 6, the pressing portion 41 of the fixing member 40 has a disk shape, and the arc serving as the contact portion between the pressing portion 41 and the concave spherical surface 32 is the center line O (the front portion of the support base 23). It is located on a plane perpendicular to the virtual line perpendicular to the plane of 23a, or the center line of the insertion hole 37 opened in the support base 23, that is, the center line of the screw shaft 42). However, in the present invention, in an arc located on a plane perpendicular to the center line O and having a constant radius from the center line O, the pressing portion 41 and the concave spherical surface 32 are at a plurality of contact points (for example, three places). It may be in contact with each other.

In the tilting support portion 230 of the third embodiment shown in FIG. 7, the center line O1 is not perpendicular to the plane of the front portion 23a of the support base 23, and the center line O1 is in the front-rear direction (Z1-Z2 direction). It is tilted. The tilting center P, which is the intersection of the center line O1 and the reflecting surface 21a of the plane mirror 21, is located at the center (center of the figure) of the reflecting surface 21a. Further, the center of the tapered sliding surface 36 of the support recess 35 coincides with the center line O1, and the center of the screw shaft 42 also coincides with the center line O1. Even in this tilting support portion 230, the contact position between the tapered sliding surface 36 and the spherical sliding portion 33 does not change regardless of how the angle of the reflective surface 21a changes, and the pressing portion 41 of the fixing member 40 The contact state with the concave spherical surface 32 does not change either. Therefore, the tilting protrusion 31 can be stably pressed against the tapered sliding surface 36 of the support recess 35 by the tightening force f of the nut 45.

FIG. 8 shows the tilting support portion 330 of the fourth embodiment.
In this tilting support portion 330, the front surface of the support recess 35 of the support base 23 is a spherical sliding portion 136, and the tilting protrusion 31 of the holding member 22 abuts on the spherical sliding portion 136. A contact portion 133 is provided. The center of the sphere of the spherical sliding portion 136 is located at the tilt center P and coincides with the center of the sphere of the concave spherical surface 32.

In the tilt support portion 330, when the tilt angle between the holding member 22 and the flat mirror 21 changes, the contact position between the spherical sliding portion 136 and the contact portion 133 changes. However, no matter how the tilt angle between the holding member 22 and the flat mirror 21 changes, the contact state between the pressing surface 41a of the pressing portion 41 of the fixing member 40 and the concave spherical surface 32 of the tilting protrusion 31 does not change. Therefore, the tilting protrusion 31 can be stably fixed in the support recess 35 by the tightening force f when the nut 45 is tightened.

In the present invention, the surface of the support recess 35 facing the Z1 direction is a concave spherical sliding portion, and the surface of the tilting protrusion 31 facing the Z2 direction is a protruding spherical sliding portion 31. And the support recess 35 may slide between the spherical sliding portions.

Further, the adjusting mechanism 50 is not provided, and after adjusting the tilt angle of the holding member 22 and the flat mirror 21 by using a jig or the like, the nut 45 is tightened to form the holding member 22 and the support base 23. May be fixed.

Further, the tilting support portion 30 and the adjusting mechanism 50 may be used as the tilt adjusting mechanism of the magnifying glass 13 shown in FIG.

Further, although the projection device 10 is used as a head-up display device in the embodiment, the present invention is applied even if the projection device 10 is used for the purpose of projecting an image on a screen indoors or outdoors. can do.

1 Automobile 2 Windshield glass (transmissive screen)
10 Projector 11 Housing 12 Image generator 13 Magnifier 20 Mirror unit 21 Flat mirror 21a Reflective surface 22 Holding member 23 Support base 30 Tilt support 31 Tilt protrusion 32 Concave spherical surface 33 Spherical sliding part 35 Support recess 36 Tapered Sliding surface 40 Fixing member 41 Pressing part 42 Screw shaft 45 Nut 50 Adjusting mechanism 51x, 51y Adjusting screw 52 Bounce member P Tilt center

Claims (7)

In a projection apparatus having an image generation unit and a mirror that reflects light including an image generated by the image generation unit.
A holding member for holding the mirror and a support base for supporting the holding member are provided, and a tilting support portion is provided between the support base and the holding member.
In the tilting support portion, the holding member is provided with a tilting protrusion, and the support base is provided with a support recess with which the tilting protrusion abuts, and the tilting protrusion and the support recess are contacted by a spherical sliding portion. A concave spherical surface that is in contact with the tilting protrusion and faces the mirror is formed with a concave spherical surface that shares the center with the spherical sliding portion.
A fixing member having a pressing portion and a screw shaft is provided, the pressing portion abuts on the concave spherical surface, the screw shaft penetrates the tilting protrusion and the support recess, and the front portion of the support base is provided. It extends to the back on the opposite side of the
In a state where the angle of the holding member is adjusted by sliding of the spherical sliding portion, the pressing portion is pressed against the concave spherical surface by the fastening force of the screw shaft, and the holding member becomes the support base. A projection device characterized by being fixed. The projection device according to claim 1, wherein the surface of the pressing portion that comes into contact with the concave spherical surface has a convex spherical surface having the same curvature as the concave spherical surface. The projection device according to claim 1 or 2, wherein an adjusting mechanism for changing the angle of the holding member is provided between the support base and the holding member. The adjusting mechanism includes an adjusting screw that is provided at at least two places and is inserted from the back portion into the support base and screwed to the holding member, and the holding member at a portion where the adjusting screw is provided. The projection device according to claim 3, further comprising an urging member that urges the support base in a direction away from the support base. The projection device according to any one of claims 1 to 4, wherein the tilting center of the holding member, which is a common center between the spherical sliding portion and the concave spherical surface, coincides with the reflection surface of the mirror. The holding member is made of a sheet metal material, the sheet metal material is pressure-deformed to form the tilting protrusion, and the spherical sliding portion is formed on the surface of the tilting protrusion facing the support recess. The projection device according to any one of claims 1 to 5, wherein the concave spherical surface is formed on the surface of the front portion of the tilting protrusion. 6. Projection device.

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