JP6505281B1 - Mirror movable mechanism of head-up display device - Google Patents

Abstract

An object of the present invention is to ensure accurate mounting of a bearing member in a stable state with respect to a rotation axis. An axial hole having a rotary shaft (21) projecting from a side surface of a mirror (6) and an arm (37) attached to the rotary shaft (21). The mirror movable mechanism 36 of the head-up display device 2 having the number 71 is related. The shaft hole 71 and the fitting portion 72 with the shaft hole 71 of the rotating shaft 21 have a polygonal shape. The polygonal shaft hole 71 has a plurality of press-fit ribs 73, 74 of different lengths inside. [Selected figure] Figure 6A

Description

  The present invention relates to a mirror movable mechanism of a head-up display device.

  In recent years, mounting of a head-up display device on a vehicle such as a car has been promoted.

  Although there are various types of head-up display devices, they have a display device capable of displaying driving information, and a mirror capable of reflecting the driving information (display image) from the display device toward the front of the cabin. Things exist.

  In the head-up display device having such a configuration, a mirror of the driving information is generated in front of the passenger compartment by reflecting the driving information from the display device toward the front of the passenger compartment by the mirror, and the front is displayed The driving information can be viewed without causing the passenger who is driving facing to make a large eye movement.

  The head-up display device includes, for example, a mirror movable including a rotary shaft protruding from a side surface of the mirror, an arm attached to the rotary shaft, and an actuator rotating the rotary shaft and the mirror through the arm. There is one having a mechanism (see, for example, Patent Document 1).

Patent No. 5446837 gazette

  In the mirror movable mechanism, it is necessary to accurately mount a member such as an arm in a stable state with respect to the rotation axis.

  Therefore, the present invention is mainly intended to solve the above-mentioned problems.

In order to solve the above problems, the present invention is
In a mirror movable mechanism of a head-up display device provided with a rotation shaft protruding from a side surface of a mirror and a bearing member having a shaft hole for press-fitting the rotation shaft,
The shaft hole is provided with a plurality of press-fit ribs which are crushed by press-fitting of the rotary shaft,
At least one of the press-fit ribs is formed to have a length shorter than the depth of the shaft hole, and is disposed to be offset to the back side in the insertion direction with respect to the shaft hole ,
The bearing member has a recess extending on the outer peripheral side of the press-in rib having a short length from the back side to the front side in the insertion direction and longer than the press-in rib having a short length. It features.

  According to the present invention, with the above configuration, it is possible to accurately mount the bearing member in a stable state with respect to the rotation shaft.

It is a block diagram of a head up display apparatus. It is a perspective view of the mirror support structure and mirror movable mechanism of FIG. Figure 3 is a perspective view of the mirror of Figure 2; It is the perspective view which looked at the mirror of FIG. 2 from the opposite side to FIG. 3A. Figure 3 is a side view of the mirror of Figure 2; It is the elements on larger scale which looked at the arm part of FIG. 2 from lower side. It is a figure which shows the cross section of the arm part of FIG. 5A. It is the elements on larger scale side view which looked at the state where the fitting part of a rotating shaft has fitted in a shaft hole from the side (inner surface side) of a mirror. It is the figure which looked at FIG. 6A from the opposite side (outer surface side). It is the perspective view which up-down inverted the arm part and was seen from the inner surface side. It is the perspective view which looked at the arm part from the outer surface side. It is the side view which turned up and down the arm part and was seen from the inner surface side. It is the side view which looked at the arm part from the outer surface side. It is a bottom view of an arm part. It is a cross-sectional view (at the position with a rib in a cross section) of the arm part of FIG. 7E. FIG. 7E is a cross-sectional view (at a position without ribs in cross section) of the arm of FIG. 7E. It is the elements on larger scale perspective view which looked at the fitting part of a rotating shaft from the reflective surface side of a mirror. It is the elements on larger scale perspective view which looked at the fitting part of a rotating shaft from the back side of a mirror. It is the partial enlarged front view which looked at the fitting part of the rotating shaft from the reflective surface side of a mirror. It is a partial expanded side view of the fitting part of a rotating shaft. It is a partial enlarged top view of the fitting part of a rotating shaft. It is a side view of the fitting part which shows a mold removal taper.

Hereinafter, the present embodiment will be described in detail with reference to the drawings.
1 to 9 are for explaining this embodiment.

  <Configuration> The configuration of this embodiment will be described below.

  As shown in FIG. 1, a head-up display device 2 is mounted on a vehicle 1 such as a car.

  There are various types of head-up display devices 2. In this embodiment, a display device 4 capable of displaying driving information 3 and driving information 3 (display image) from the display device 4 are displayed in front of the passenger compartment 1a. It is assumed that a mirror 6 (reflection member) that can reflect light to the side is provided.

  Here, the direction will be described based on the state where the head-up display device 2 is mounted on the vehicle 1. The longitudinal direction of the vehicle is substantially the longitudinal direction X or depth direction of the head-up display device 2, the lateral direction is the substantially transverse direction Y of the head-up display device 2, and the vertical direction of the vehicle 1 is substantially the vertical direction of the head-up display device 2. It becomes Z. However, since the head-up display device 2 may be mounted on the vehicle 1 in an inclined state, these directions may be deviated to some extent.

  The head-up display device 2 causes the occupant 7 driving while facing the front to visually recognize the driving information 3 without causing a large eye movement. The head-up display device 2 is installed inside the instrument panel 12 provided at the front of the compartment 1 a together with the casing 11 in a state where the display device 4 and the mirror 6 are accommodated inside the casing 11. In the upper surface of the casing 11 and the upper surface of the instrument panel 12, openings 13 and 14 for passing the operation information 3 are provided. A transparent or translucent dustproof cover 15 or the like is installed in at least one of the openings 13 and 14 in a fixed state or an openable / closable state. Although the dustproof cover 15 may be flat, it may have a concave shape or the like which is recessed downward as viewed from the side in order to prevent the dustproof cover 15 from being reflected on the front window 16 or the like.

  The driving information 3 having passed through the openings 13 and 14 is reflected by the front window 16 or is reflected by a dedicated reflecting plate called a combiner or the like installed on the front side of the openings 13 and 14. It is visually recognized as a virtual image 18. In order to reflect the driving information 3, the front window 16 is provided with, for example, a reflective film, a fine reflecting surface, or the like in a required range in which at least the driving information 3 is projected.

  The driving information 3 is general information to support driving. The driving information 3 includes, for example, speed information, road information (for example, lane display, leading car display, oncoming car display, pedestrian display, obstacle display, etc.), route information (for example, intersection information or the like) Left and right indication), destination information (for example, arrival time and travel distance to the destination), traffic jam information, service information (for example, parking lot information, gas station information, surrounding facility information), , And other indications.

  The display device 4 can use a liquid crystal panel, an organic EL panel, or the like. When a liquid crystal panel is used for the display device 4, a lighting device 4 a serving as a backlight is provided on the back side of the liquid crystal panel. Further, as the display device 4, a projector using a DLP unit which reflects laser light by a micro mirror can be used. The display image (the driving information 3) of the display device 4 is controlled by the control unit 4b.

  The passenger compartment 1 a is a space where the occupant 7 in the vehicle 1 gets on. The mirror 6 is an optical component (reflection member) such as a reflection mirror. For the mirror 6, a plane mirror that reflects the operation information 3 (display image) from the display device 4 at the same magnification, a curved surface mirror (concave mirror) that reflects in an enlarged scale, etc. are used alone or in combination. In the embodiment, two mirrors 6 are provided at the front and back). The mirror 6 can be directly fixed (fixed mirror) to the inside of the casing 11 as, for example, the one on the right side of the figure. Also, the mirror 6 can be installed so as to be movable by the mirror support structure 20, for example, like the one on the left side of the figure (movable mirror).

  As shown in FIG. 2, the mirror support structure 20 rotatably supports (at least one of) the mirrors 6 about the rotation shafts 21 and 22. The mirror support structure 20 has rotary shafts 21 and 22 protruding from the side surface 6 a of the mirror 6, bearings 23 and 24 for supporting the rotary shafts 21 and 22, and the mirror 6 in the axial direction 25 of the rotary shafts 21 and 22. And an elastic member 26 pressing from one side to the other side. The axial direction 25 is installed substantially horizontally in the width direction Y in a state of being mounted on the vehicle 1.

  Here, the mirror 6 is horizontally elongated extending substantially in the width direction Y, and is pivoted substantially in the vertical direction Z about the rotation shafts 21 and 22. The mirror 6 is intentionally made non-rectangular or the like in order to prevent distortion in the operation information 3 when reflected by the front window 16 having a complicated three-dimensional curved surface shape.

  The side surfaces 6 a of the mirror 6 are a pair of opposite sides provided with the rotation shafts 21 and 22, and are, for example, the vertical sides of the mirror 6. The rotating shafts 21 and 22 are respectively provided laterally from the side surfaces 6 a of the mirror 6 so as to be positioned on the same axis. The rotary shafts 21 and 22 may be provided at any position of the side surface 6 a of the mirror 6, but in this embodiment, they are provided at the middle portion (in the vertical direction Z) of the side surface 6 a of the mirror 6. The rotary shafts 21 and 22 may be provided separately from the mirror 6, but when the mirror 6 is made of resin, the rotary shafts 21 and 22 can be formed integrally with the mirror 6.

  The elastic member 26 is provided on one side surface 6 a (the pressing side) of the mirror 6, and presses the mirror 6 toward the other side surface 6 a (the pressing side) to move the mirror 6 by vehicle vibration. This prevents the driving information 3 (display image) from blurring.

  The mirror 6 is rotatable between the use position 34 and the standby position 35 by the mirror support structure 20. The use position 34 is the position of the mirror 6 when the head-up display device 2 is used. At the use position 34, the display height can be adjusted so that the driving information 3 can be displayed at the optimum position according to the physical constitution (or eye height) of the occupant 7, and the mirror 6 is vertically It is slightly rotated in the relatively lying state with respect to the direction Z.

  The standby position 35 is the position of the mirror 6 when the head-up display device 2 is not in use. At the standby position 35, the mirror 6 is set to stand in the vertical direction Z more than the use position 34. By setting the mirror 6 to the standby position 35, external light incident on the inside of the casing 11 is not retroreflected toward the display device 4, so that damage to the display device 4 due to retroreflection of external light can be prevented. Even when the head-up display device 2 is used, it is possible to temporarily place the mirror 6 in the standby position 35 so as not to retroreflect external light when the amount of incident external light into the casing 11 is large. In particular, when a concave mirror is used as the mirror 6, the outside light is condensed by the concave mirror and irradiated to the display device 4, and damage to the display device 4 becomes large. It is effective to evacuate to 35.

  Furthermore, the mirror 6 (movable mirror) supported by the mirror support structure 20 can be automatically moved (rotated) using the mirror movable mechanism 36 (or mirror rotating mechanism).

  The mirror movable mechanism 36 may be configured by a link mechanism or may be configured by a gear mechanism. In this embodiment, the mirror movable mechanism 36 includes an arm 37 attached to one of the rotation shafts 21 and an actuator 38 for rotating the rotation shaft 21 and the mirror 6 via the arm 37. When the mirror movable mechanism 36 is a link mechanism, the arm 37 is moved by an actuator 38 such as a cylinder.

  When the mirror movable mechanism 36 is a gear mechanism, the arm portion 37 extends, for example, in the radial direction of the rotary shaft 21 and is a gear such as a sector gear having gear teeth 37a at its tip. The sector gear is formed at an angle (approximately 25 ° to 30 °) covering at least the normal rotation range between the standby position 35 and the use position 34. The actuator 38 uses a motor. The motor engages a gear such as a drive gear 38a attached to the output shaft with the gear teeth 37a of the sector gear to rotationally drive the arm portion 37. The pivoting member (or shaft attachment member) such as the arm portion 37 and the drive gear 38a constitutes a drive power transmission unit 36a (or drive power transmission mechanism). Note that, contrary to the above, the arm portion 37 may be attached to the output shaft of the motor, and the drive gear 38 a may be attached to the rotating shaft 21. The arm portion 37 is biased by the return spring 39 in one of the rotational directions toward the use position 34 or the standby position 35 described above. The return spring 39 also performs backlash between the sector gear and the drive gear 38a. The motor is fixed to the casing 11 via the mounting bracket 40.

  With respect to the head-up display device 2 as described above, in this embodiment, the mirror movable mechanism 36 is as follows.

(1) The mirror movable mechanism 36, as shown in FIGS. 3A to 5B, includes the rotary shaft 21 protruding from the side surface 6a of the mirror 6 and the bearing member (arm portion 37) attached to the rotary shaft 21. Have
The shaft attachment member (arm portion 37) has an axial hole 71 which can be axially attached to the rotation shaft 21.
And as shown to FIG. 6A and FIG. 6B, the fitting part 72 with the axial hole 71 and the axial hole 71 of the rotating shaft 21 is made into polygonal shape. The polygonal shaft hole 71 is internally provided with a plurality of press-fit ribs 73, 74 having different lengths.

  Here, the bearing member refers to a member (or a pivoting member) that is pivotally attached to the rotary shaft 21 so as to be integrally pivotable, and hereinafter, the arm portion 37 will be described as the bearing member. However, when the drive gear 38a or the like is attached to the rotary shaft 21 instead of the arm portion 37, the drive gear 38a serves as a shaft attachment member, and the shaft hole 71 in which the fitting portion 72 fits is provided in the drive gear 38a. The fitting portion 72 is a portion that fits in the shaft hole 71 of the arm portion 37 in the rotation shaft 21. The fitting portion 72 is provided on the tip end side of the rotary shaft 21 so as to have a length substantially equal to the thickness of the arm portion 37.

  The polygonal shaft hole 71 and the fitting portion 72 can be a polygon having a triangle or more. The shaft hole 71 and the fitting portion 72 have substantially the same shape and size so that they can be fitted to each other. A plurality of press-fit ribs 73 and 74 having different lengths may be provided in any arrangement pattern for any side of the polygonal shaft hole 71 and the fitting portion 72. For example, a plurality of press-fit ribs 73 and 74 having different lengths may be provided together on the same side, or may be separately provided on different sides. A preferable arrangement pattern of the plurality of press-fit ribs 73 and 74 will be described later.

  The press-fit ribs 73 and 74 are ribs slightly higher than the clearance of the fitting portion 72 between the rotary shaft 21 and the shaft hole 71. The press-fit ribs 73, 74 extend along the axial direction 25 of the rotating shaft 21. The press fit ribs 73 and 74 may be provided on either (one or both) of the rotary shaft 21 and the shaft hole 71, but in this embodiment, they are provided on the shaft hole 71.

  The plurality of press-fit ribs 73 and 74 having different lengths may be separated as long as they have different lengths, but preferably, as shown in FIGS. 7A to 7G (mainly referring to FIG. 7B), fitting portions 72 There are two types, a long press-in rib 73 (long rib) and a short press-in rib 74 (short rib) having a length approximately half that of the entire length in the axial direction 25 of FIG. The short press-in rib 74 is preferably provided at a position on the far side (the side opposite to the mirror 6) of the shaft hole 71 in the direction in which the fitting portion 72 is fitted.

  (2) The shaft hole 71 may have side portions 71 a to 71 e in which a plurality of press-fit ribs 73 and 74 are provided.

  Here, the plurality of press-fit ribs 73, 74 may be provided on any side 71a to 71e of the shaft hole 71, or may be provided for the plurality of sides 71a to 71e. In this case, only one side 71a is provided. The plurality of press-fit ribs 73 and 74 provided on the same side 71a to 71e may be a plurality of press-fit ribs 73 and 74 having different lengths, but preferably have the same length (long press-fit ribs 73 or Short press-in ribs 74). More preferably, a plurality of long press-in ribs 73 are provided for one side 71a.

  (3) The shaft hole 71 may have an odd polygonal shape. One side 71a of the odd-numbered polygonal shape may be a long side, and the other sides 71b to 71e may be short sides. A plurality of press-fit ribs 73 and 74 may be provided for the long side 71 a of the shaft hole 71.

Here, the odd polygon is a polygon having an odd side such as, for example, a triangle, a pentagon, a heptagon , a pentagon, and so on. In this case, at the same time as the shaft hole 71, the fitting portion 72 is made into an odd polygon as described later. The odd polygons are, for example, pentagonal in this embodiment. The long side 71 a may have any length, for example, a side having such a length that two adjacent sides of a regular hexagon are evenly leveled. The short sides 71 b to 71 e may be shorter than the long sides 71 a and may have different lengths, but preferably have the same length. In this embodiment, the short sides 71b to 71e have the same length and arrangement as the remaining four sides of the regular hexagon. As a result, the odd numbered polygon has a combination of pentagonal features and regular hexagonal features. However, the odd number polygon is not limited to the above.

(4) The press-fit ribs 73 and 74 may be provided on the side portions 71a to 71e of the shaft holes 71 in the odd polygonal shape.
The plurality of press-fit ribs 73 of the long side 71 a may be formed longer than the press-fit ribs 74 of the short sides 71 b to 71 e.

  Here, the shaft holes 71 in the odd polygonal shape are provided with press-fit ribs 73, 74 on all the side portions 71a to 71e. At this time, the plurality of press-fit ribs 73, 74 of the long side portion 71 a is, for example, a long press-fit rib 73 that covers substantially the entire axial direction 25 of the shaft hole 71. In this embodiment, two long press-in ribs 73 are provided at positions where the side of the long side 71a is divided into three. The spacing between the long press-in ribs 73 should be as wide as possible.

  Then, for example, the short press-in rib 74 of the short side portions 71b to 71e is approximately half the length of the long press-in rib 73 or slightly longer (about 50% to 70% of the long press-in rib 73) Make it In this embodiment, one short press-in rib 74 is provided at the central portion of the short sides 71 b to 71 e in a state of being biased to the back side of the short sides 71 b to 71 e.

(5) As shown to FIG. 8A-FIG. 8E, the fitting part 72 of the rotating shaft 21 may be made into odd-numbered polygon shape. One side 72a of the odd-numbered polygonal shape may be a long side, and the other sides 72b to 72e may be short sides.
The long side 72 a of the fitting portion 72 may be disposed toward the reflective surface 6 b of the mirror 6.

  Here, the odd polygonal shape of the fitting portion 72 has approximately the same size and shape as the odd polygonal shape of the axial hole 71 so as to be able to be fitted into the axial hole 71 having an odd polygonal shape. The reflective surface 6b of the mirror 6 is the surface of the mirror 6 to which mirror surface processing has been applied. In this embodiment, the mirror 6 is a concave mirror having a substantially straight side surface 6 a when viewed from the side. The long side portion 72a is provided in parallel with the linear side surface 6a in a state where the long side portion 72a is substantially directed to the reflecting surface 6b side of the mirror 6 as viewed from the side (FIG. 4).

  (6) The parting line 75 may be provided when the mirror 6 is stamped out on the short sides 72 b to 72 e of the fitting portion 72 of the rotary shaft 21.

  Here, the parting line 75 is a molding protrusion which can be formed at the joint of an injection mold (male mold and female mold) for injection molding the resin mirror 6. The parting line 75 may be formed on any of the short sides 72b to 72e, but along the plane parallel to the long side 72a with respect to the two short sides 72b and 72e adjacent to the long side 72a. Is preferably provided.

  (7) As shown in FIG. 9, the die removal taper 76 may be provided on the short sides 72 b to 72 e of the fitting portion 72, and the long side 72 a may be a non-taper surface 77.

  Here, the die-off taper 76 is a slight inclined shape required to take out the (molded mirror 6) from the injection mold. The die-cut taper 76 becomes an inclined portion or an inclined surface which becomes narrower as it proceeds in the die-removing direction. The non-taper surface 77 is a surface without an inclined shape (the die removal taper 76) which can be formed to a portion which does not affect the die removal. In this embodiment, the long side portion 72 a formed in parallel with the side surface 6 a of the mirror 6 is a non-taper surface 77.

  For example, as shown in the figure, when the injection mold is opened on the reflective surface 6b side (right side in the figure) and the back side (left side in the figure) with the parting line 75 as a boundary, both sides of the parting line 75 The die-cut taper 76 is required. At this time, since the parting lines 75 are on (intermediate positions of) the short side 72 b and the short side 72 e, the short sides 72 b and the short sides 72 e have opposite slopes on both sides of the parting line 75. There are two types of die removal tapers 76, but the long side 72a (parallel to the side face 6a) facing the reflective surface 6b of the mirror 6 is a surface not affected by die removal, so no taper surface It can be 77.

  Also, for example, in the case where the injection molding die is opened on the reflective surface 6b side (right side in the drawing) and the back side (left side in the drawing) with the parting line 75 as a boundary, the parting line 75 has a short side It is also possible to eliminate the mold removal taper 76 on the right side in the drawing and provide only the mold removal taper 76 on the left side by providing the part 72 b and the short side 72 e at the corner part with the long side 72 a. Even in this case, the long side portion 72a (parallel to the side surface 6a) facing the reflecting surface 6b of the mirror 6 is a surface not affected by die removal, so it can be a non-tapered surface 77.

  Furthermore, for example, when the injection mold is opened on the side of the reflecting surface 6b (right side in the figure) and the back side (left side in the figure) with the parting line 75 as a boundary, fitting (of the rotation shaft 21) A partial slide type may be provided for the portion on the long side portion 72a side of the portion 72, and the slide type may be pulled out to the front side of the figure. Also in this case, the long side 72a (parallel to the side surface 6a) facing the reflecting surface 6b of the mirror 6 is not affected by the removal of the die, and therefore, it can be a non-tapered surface 77.

  Further, in any of the above cases, as indicated by phantom lines in FIG. 8C, the distal end side of the rotation shaft 21 is easily inserted into the shaft hole 71 so that at least the short side 72b to the short side 72e are easily inserted. It can be a tapered shape. As described above, when the rotary shaft 21 is tapered, the shaft hole 71 of the arm 37 may be narrowed from the near side toward the far side according to the tapered shape (back narrow shape). This makes it possible to prevent reverse insertion of the arm portion 37 with respect to the rotation shaft 21.

  <Operation> The operation of this embodiment will be described below.

  The head-up display device 2 causes the mirror 6 to reflect the driving information 3 from the display device 4 toward the front of the passenger compartment 1a, thereby generating a virtual image 18 of the driving information 3 in front of the passenger compartment 1a. The driving information 3 can be viewed without causing the occupant 7 driving facing the front to make a large eye movement.

  At this time, by providing the mirror 6 in the middle of the light path and bending the light path (compared to directing the drive information 3 from the display unit 4 to the front of the vehicle compartment 1a), the drive information 3 from the display unit 4 It is possible to lengthen the light path of and to display the driving information 3 in an enlarged manner. Thus, the head-up display device 2 can achieve distant display of the driving information 3 and a wide angle of view of the driving information 3.

  The mirror 6 is supported by a mirror support structure 20 and rotated by a mirror movable mechanism 36. At this time, the mirror movable mechanism 36 rotates the mirror 6 by transmitting the driving force of the actuator 38 to the rotation shaft 21 of the mirror 6 via the arm portion 37. In order to increase the display accuracy of the head-up display device 2 or the like, the arm unit 37 needs to be accurately held (attached) in a stable state with respect to the rotation shaft 21.

  <Effects> According to this embodiment, the following effects can be obtained.

  (Effect 1) The shaft hole 71 and the fitting portion 72 with the shaft hole 71 of the rotating shaft 21 are polygonal. Thus, the sides 71a to 71e of the polygonal shaft hole 71 and the sides 72a to 72e of the polygonal fitting portion 72 are combined with each other, so that the rotation of the rotation shaft 21 can be made efficiently and reliably. It can be transmitted to the arm portion 37 (shaft attachment member).

  Press-fit ribs 73, 74 are provided inside the shaft hole 71. As a result, when the rotary shaft 21 is fitted into the shaft hole 71, the press-fit ribs 73 and 74 are crushed to prevent the arm portion 37 (shaft attachment member) from rotating away from the shaft hole 71. And the backlash between the rotation shaft 21 and the shaft hole 71 can be eliminated.

  A plurality of press-fit ribs 73, 74 having different lengths are provided inside the polygonal shaft hole 71. Thus, when the rotary shaft 21 is fitted into the shaft hole 71, the short press-in rib 74 contacts the rotary shaft 21 at a short distance, so the short press-in rib 74 is moved to the back side of the shaft hole 71 (in the fitting direction). By providing the one-side offset, the rotary shaft 21 can be easily inserted from the near side to the back of the shaft hole 71, and it can be difficult to insert the rotary shaft 21 into the shaft hole 71 from the back side. As described above, by making the ease of inserting the rotary shaft 21 into the shaft hole 71 different between the front side and the back side of the shaft hole 71, it is possible to prevent reverse insertion of the arm portion 37 (shaft attachment member).

  Further, since the long press-in rib 73 contacts with the rotary shaft 21 at a long distance, the long press-in rib 73 rotates the arm portion 37 (shaft attachment member) so that the rotary shaft 21 is not inclined in the axial direction 25 with respect to the shaft hole 71. The shaft 21 can be held accurately in a stable state.

  In this manner, the arm portion 37 (shaft attachment member) can be accurately held in a stable state on the rotation shaft 21, whereby the arm portion 37 (shaft attachment in relation to the axial direction 25 or the circumferential direction) can be Mounting accuracy can be improved. Therefore, the accuracy of the angle and position of (the reflective surface 6b of) the mirror 6 when using the head-up display device 2 can be improved, and the display accuracy of the head-up display device 2 can be improved.

  (Effect 2) A plurality of press-fit ribs 73, 74 may be provided on at least one of the side portions 71a to 71e of the shaft hole 71. Thus, by providing the plurality of press-fit ribs 73, 74 on at least one side (for example, the side 71a), the rotary shaft 21 is circumferentially moved relative to the shaft hole 71 by the plurality of press-in ribs 73, 74. The arm 37 (shaft attachment member) can be accurately held in a stable state on the rotation shaft 21 so as not to tilt (multipoint support). Further, by providing a plurality of long press-fit ribs 73 with respect to one side portion 71 a, the rotary shaft 21 can be held so as not to be inclined with respect to both the circumferential direction and the axial direction 25 with respect to the shaft hole 71.

  (Effect 3) The shaft hole 71 may have an odd polygonal shape (for example, a pentagonal shape). As a result, since the shaft hole 71 has a relatively special shape that is not an even-numbered polygon (for example, a quadrangle or a hexagon) generally found, misassembly with other parts can be prevented. One side 71 a of the shaft hole 71 and the fitting portion 72 is a long side, and the other sides 71 b to 71 e are short sides. As a result, the shaft hole 71 has a special shape that is not a regular polygon, and if the angle is shifted, it can not be physically assembled, and the long side 71 a and the short sides 71 b to 71 e can be easily identified visually. Thus, it is possible to prevent the circumferential assembly error of the rotating shaft 21 with respect to the shaft hole 71.

  A plurality of press-fit ribs 73 and 74 are provided on the long side 71 a of the shaft hole 71. Thereby, the plurality of press-fit ribs 73, 74 can be easily formed for the long side portion 71a, and the distance between the plurality of press-fit ribs 73, 74 can be increased. The effect of holding so as not to tilt in the direction can be further enhanced.

  (Effect 4) The press-fit ribs 73 and 74 may be respectively provided to the side portions 71a to 71e of the shaft holes 71 in the odd polygonal shape. Thereby, in addition to the above, the arm portions 37 are provided such that the rotary shaft 21 is not inclined in the circumferential direction at all the side portions 71a to 71e of the shaft hole 71 by the press fit ribs 73 and 74 provided on the side portions 71a to 71e. The (shaft attachment member) can be accurately held in a stable state on the rotary shaft 21.

  At this time, in particular, the short press-in ribs 74 may be provided on the short side portions 71b to 71e. Thus, when the rotary shaft 21 is fitted into the shaft hole 71, the rotary shaft 21 can be easily inserted by the short press-in ribs 74 of the short side portions 71b to 71e.

  The long side 71 a may be provided with a plurality of press-in ribs 73 longer than the press-in ribs 74 of the short sides 71 b to 71 e. Thereby, in addition to the above, the above-described effects of the plurality of press-in ribs 73 and the above-described effects of the plurality of press-in ribs 73 and 74 with respect to the long side 71 a can be combined. Can be accurately held in a stable state more effectively with respect to the rotation shaft 21.

  (Effect 5) For example, when the reflecting surface 6b of the mirror 6 is a complicated optical curved surface that is not a simple plane such as a concave mirror, a reference surface in design, manufacturing and inspection on the reflecting surface 6b Is difficult to set, but if it is possible to set a reference surface near the reflective surface 6b, it becomes an effective reference surface instead of the reflective surface 6b. Therefore, of the side portions 72a to 72e of the fitting portion 72 having an odd polygonal shape of the rotary shaft 21 positioned near the reflecting surface 6b, the long side portion 72a is directed to the reflecting surface 6b side of the mirror 6 It may be arranged. Thereby, the long side 72 a of the rotating shaft 21 can be used as a reference surface of the mirror 6. Then, by using the long side 72a as a reference surface, it becomes possible to design and manufacture the mirror 6 with high accuracy, and to carry out highly reliable product inspection.

  (Effect 6) A parting line 75 may be provided when the mirror 6 is stamped with respect to the short sides 72b to 72e of the rotary shaft 21. As a result, since the parting line 75 can be eliminated from the long side 72a, the surface accuracy of the long side 72a can be increased. Therefore, when the long side portion 72a is used as a reference plane, the surface accuracy of the long side portion 72a is high, which makes it possible to design and manufacture the mirror 6 with higher accuracy, and a more reliable product. It can carry out inspections.

  (Effect 7) The mold removal taper 76 may be provided on the short sides 72b to 72e of the rotary shaft 21, and the long side 72a may be used as the non-taper surface 77. As a result, when the injection molding die is opened with the parting line 75 as the boundary, the mirror 6 can be punched out without any trouble along the short side portions 72 b to 72 e having the die removal taper 76. Therefore, the long side portion 72 a is a surface that is not affected by removal, so the long side portion 72 a can be a non-taper surface 77. This can further improve the surface accuracy of the long side 72a. Therefore, when the long side 72a is used as a reference plane, the surface precision of the long side 72a is high, which makes it possible to design and manufacture the mirror 6 with higher accuracy, and a product with higher reliability. It can carry out inspections.

Reference Signs List 2 head-up display device 6 mirror 6 a side surface 6 b reflective surface 21 rotating shaft 23 bearing 36 mirror movable mechanism 37 arm portion (axially attached member)
38 Actuator 38a Drive gear (Attach member)
71 shaft hole 71a side (long side)
71b to 71e side (short side)
72 fitting part 72a side part (long side part)
72b to 72e side (short side)
73 (long) press-in rib 74 (short) press-in rib 75 parting line 76 die taper 77 non-tapered surface

Claims (7)

In a mirror movable mechanism of a head-up display device provided with a rotation shaft protruding from a side surface of a mirror and a bearing member having a shaft hole for press-fitting the rotation shaft,
The shaft hole is provided with a plurality of press-fit ribs which are crushed by press-fitting of the rotary shaft,
At least one of the press-fit ribs is formed to have a length shorter than the depth of the shaft hole, and is disposed to be offset to the back side in the insertion direction with respect to the shaft hole ,
The bearing member has a recess extending on the outer peripheral side of the press-in rib having a short length from the back side to the front side in the insertion direction and longer than the press-in rib having a short length. The mirror movable mechanism of the head up display device which is characterized. In the mirror movable mechanism of the head-up display device according to claim 1 ,
The mirror movable mechanism of a head-up display device according to claim 1, wherein the shaft hole is formed in a polygonal shape, and the polygonal shaft hole has at least one side portion on which a plurality of the press-fit ribs are provided. The mirror movable mechanism of the head-up display device according to claim 1 or 2
The axial hole is formed into an odd polygonal shape having one long side and another short side,
A mirror movable mechanism of a head-up display device, wherein a plurality of press-fit ribs are provided on the long side of the shaft hole. In the mirror movable mechanism of the head-up display device according to claim 3 ,
The press-fit rib is provided on each side of the shaft hole in an odd polygonal shape,
The press-in rib having a short length is formed on the short side portion,
The mirror movable mechanism of a head-up display device according to claim 1, wherein the plurality of press-fit ribs on the long side are formed longer than the press-fit ribs on the short side short length. In the mirror movable mechanism of the head-up display device according to claim 3 or 4 ,
The fitting portion of the rotation shaft with respect to the shaft hole is an odd polygon shape having one long side portion coinciding with the shaft hole of the odd polygon shape, and the other short side portions.
The mirror movable mechanism of a head-up display device, wherein the long side portion of the fitting portion is disposed toward the reflection surface side of the mirror. In the mirror movable mechanism of the head-up display device according to claim 5 ,
The mirror movable mechanism of a head-up display device, wherein a parting line at the time of die-cutting the mirror is provided for two short sides adjacent to the long sides of the fitting portion. In the mirror movable mechanism of the head-up display device according to claim 6 ,
Die-cut tapers having opposite gradients are provided on both sides of the parting line on the short side part having the parting line, and the long side part is a non-tapered surface with respect to the parting direction. The mirror movable mechanism of the head up display apparatus characterized by the above.