CN113009683B - Driving device and head-up display device - Google Patents

Abstract

The invention provides a driving device and a head-up display device, wherein the driving device can restrain the swing of a movable component and the contact sound between the movable component and a driven component in a structure that the movable component moves along with the translation of the driven component. The drive unit (30) has a lead screw (34), a nut member (72), a slide member (42), a first arm (78), and a second arm (83). The nut member (72) receives a rotational force from the lead screw (34). The sliding member (42) translates the nut member (72) by contact with the nut member (72) and moves in the translation direction of the nut member (72). The first arm (78) and the second arm (83) are formed on the nut member (72) and elastically deform as the nut member (72) and the slide member (42) contact each other in the direction of rotation of the screw (34).

Description

Driving device and head-up display device

Technical Field

The present invention relates to a driving device for moving a movable member by a driving force of a driving unit and a head-up display device including the driving device.

Background

At present, the following driving devices are known: the slider is moved in the axial direction by bringing a follower member, which moves in accordance with the rotation of the output shaft, into contact with the slider provided movably along the fixed shaft (patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2019-210940

Disclosure of Invention

Technical problem to be solved by the invention

There is a driving device, as described in patent document 1, including: a driven member receiving a rotational force from a rotational shaft to be translated; and a movable member that moves in a translational direction by contact with the driven member, and that brings the driven member and the movable member into contact in a rotational direction. In this structure, the rotation of the driven member is suppressed by the movable member, but the rotational force acting on the driven member is not constant. Therefore, the movable member may easily swing due to the variation of the rotational force transmitted from the driven member to the movable member. In addition, as the movable member swings, the driven member and the movable member separate, and the movable member and the driven member come into contact again, whereby a contact sound may be easily generated.

The invention aims to provide a driving device and a head-up display device which can restrain swinging of a movable component and contact sound of the movable component and a driven component in a structure that the movable component moves along with translation of the driven component.

Technical scheme for solving technical problems

In order to solve the above-described problems, a driving device according to the present invention includes: a rotating shaft rotated by a driving unit; a driven member receiving a rotational force from the rotational shaft; a movable member that translates the driven member and moves in a direction of translation of the driven member by contact thereof with the driven member; and an elastic portion formed on at least one of the driven member and the movable member and elastically deformed in accordance with contact between the driven member and the movable member in a rotation direction of the rotary shaft.

According to this aspect, when the driven member is in contact with the movable member in the rotational direction, the elastic portion formed in at least one of the driven member and the movable member is elastically deformed, and thus the movable member is allowed to move, i.e., slide, relative to the movable member while maintaining the contact state between the movable member and the driven member. Accordingly, when the movable member moves in accordance with the translation of the driven member, repeated contact and separation between the driven member and the movable member is suppressed even if the relative positions of the driven member and the movable member change, and therefore, the rocking of the movable member and the contact sound between the movable member and the driven member can be suppressed.

In the above-described driving device, it is preferable that the elastic portion is formed on the driven member.

According to this aspect, the elastic portion is formed on the driven member that directly receives the rotational force from the rotating shaft, and the amount of deformation in the elastic deformation is easily grasped, so the elastic portion can be easily formed.

In the above-described driving device, it is preferable that a recess is formed in the movable member, an insertion portion to be inserted into the recess is formed in the driven member, and the elastic portion is formed in at least one of the recess and the insertion portion.

According to this aspect, since the driven member and the movable member can be contacted in a range where the insertion portion is inserted into the recessed portion, the contact area between the driven member and the movable member can be increased as compared with a structure without the recessed portion.

In the above-described driving device of the present invention, it is preferable that a contact portion of the insertion portion with the movable member is a curved surface portion.

According to this aspect, since the contact portion of the insertion portion with the movable member is the curved surface portion, the surface thereof in contact with the contacted surface on the movable member side is a curved surface. Accordingly, even if the angle of the elastic portion with respect to the contacted surface on the movable member side is changed, the contact state between the contacted surface and the curved surface can be maintained, and therefore, variation in the contact area between the movable member and the elastic portion can be suppressed.

In the above drive device, it is preferable that the elastic portion is formed in the insertion portion, and the insertion portion includes a first insertion portion and a second insertion portion that face each other in the rotational direction and are capable of contacting and separating from each other.

According to this aspect, since there is a space between the first insertion portion and the second insertion portion and the elastic portion is not present, the deformation stroke of the insertion portion can be ensured compared to a configuration using one large insertion portion.

In the above-described driving device, it is preferable that a guide member for guiding the movable member in the translational direction is provided, and at least one of the first insertion portion and the second insertion portion is disposed on a side opposite to the guide member with respect to a virtual line intersecting an axial center line of the rotary shaft.

According to this aspect, since the movable member is guided by the guide member, the movement of the movable member in the translational direction is stabilized, and therefore, the positional variation of the movable member in the plane intersecting the translational direction can be suppressed. Further, since at least one of the first insertion portion and the second insertion portion is disposed on the opposite side of the guide member with respect to the virtual line, a space is secured on the guide member side, and therefore the guide member can be disposed close to the driven member. Accordingly, in the case where the movable member pivots about the guide member as a fulcrum, the position where the driven member and the movable member contact each other is arranged close to the guide member, and the pivoting is suppressed, so that the rotational force can be suppressed from acting on the movable member.

In the above-described driving device, it is preferable that a protruding portion is formed on an opposing surface of at least one of the first insertion portion and the second insertion portion.

According to this aspect, when an external force acts on at least one of the first insertion portion and the second insertion portion in a direction in which the first insertion portion and the second insertion portion approach, the protruding portion comes into contact with the first insertion portion or the second insertion portion or the protruding portion of the other. In this way, the first insertion portion and the second insertion portion do not come too close to each other, and therefore, excessive deformation of at least one of the first insertion portion and the second insertion portion can be suppressed.

In the above-described driving device, it is preferable that a protruding portion protruding to a side away from the rotation axis is formed in a portion of the driven member opposite to the insertion portion side with respect to the rotation axis.

According to this aspect, in the assembling work of the driving device, when the insertion portion is inserted into the recess portion, the driven member is held by pinching the protruding portion. Thereby, the insertion operation of the insertion portion into the recessed portion can be performed more easily than a structure without the protruding portion.

In the above-described driving device, it is preferable that the driven member has a translation portion that translates upon receiving a rotational force from the rotational shaft, and the elastic portion is at least one shank portion that extends from the translation portion in a crossing direction crossing the rotational direction.

According to this aspect, since the stem portion extends in the intersecting direction, the stem portion is in a cantilever state, and therefore, the amount of elastic deformation of the stem portion can be ensured.

In the above-described driving device, it is preferable that a contact portion of the shank portion with the movable member is a curved surface portion.

According to the present aspect, since the contact portion of the shank portion with the movable member is the curved surface portion, the surface thereof contacting the contacted surface on the movable member side is a curved surface. Thus, even if the angle of the shank with respect to the contacted surface on the movable member side is changed, the contact state between the contacted surface and the curved surface can be maintained, and therefore, variation in the contact area between the movable member and the shank can be suppressed.

In the above drive, it is preferable that the movable member is provided with a housing portion for housing the driven member, the housing portion has an opening portion that opens in the intersecting direction, a contact surface of the housing portion with the shank portion is an inclined surface that is inclined in a direction intersecting the intersecting direction as viewed in the translational direction, and the inclined surface is inclined such that a space of the housing portion is expanded as the inclined surface approaches the opening portion in the intersecting direction.

According to this aspect, the space of the housing portion is enlarged as the distance from the opening portion is increased, so that the driven member can be easily inserted into the housing portion through the opening portion.

In the above-described driving device of the present invention, it is preferable that the shank portion includes a first shank portion and a second shank portion which face each other in the rotational direction and are capable of coming into contact with and separating from each other.

According to the present aspect, since there is a space between the first shank portion and the second shank portion, and the elastic portion is not present between the first shank portion and the second shank portion, the deformation stroke of the shank portion can be ensured as compared with a configuration using one large shank portion.

In the above-described driving device of the present invention, it is preferable that a protruding portion is formed on an opposing surface of at least one of the first shank portion and the second shank portion.

According to this aspect, when an external force acts on at least one of the first shank portion and the second shank portion in a direction in which the first shank portion and the second shank portion approach, the protruding portion comes into contact with the protruding portion of the first shank portion or the second shank portion or the other. Accordingly, the first shank and the second shank do not come too close to each other, and therefore, excessive deformation of at least one of the first shank and the second shank can be suppressed.

In the above-described driving device, it is preferable that the driven member is made of resin, and a recess portion from which a gate formed in resin molding is removed is formed in the translation portion on a side opposite to a side where the shank portion is formed.

According to this aspect, when the gate is removed in the recess, a part of the gate remains in the recess. In other words, since the part of the gate remaining is suppressed from protruding outward from the translation portion, the part of the gate remaining and the movable member can be suppressed from coming into contact.

Further, a head-up display device according to the present invention includes: an emission unit that emits light corresponding to information displayed on a displayed unit; a reflecting member that reflects the light of the emission portion toward the displayed portion; and a driving device according to any one of the above aspects, wherein the movable member holds the reflecting member, and the angle of reflection of light by the reflecting member is changed by moving the movable member in the translational direction.

According to this aspect, the same operational effects as those of any of the above-described aspects can be obtained.

Effects of the invention

According to the present invention, in the structure in which the driven member and the movable member slide, when the movable member moves, the swing of the movable member and the contact sound of the movable member and the driven member can be suppressed.

Drawings

Fig. 1 is a schematic overall configuration diagram showing a vehicle equipped with a head-up display device including a drive unit according to embodiment 1 of the present invention.

Fig. 2 is a side sectional view showing an internal structure of the head-up display device according to embodiment 1.

Fig. 3 is a perspective view showing the second mirror, the mirror holder, and the drive unit according to embodiment 1.

Fig. 4 is a perspective view showing the drive unit according to embodiment 1.

Fig. 5 is a partial vertical cross-sectional view showing the arrangement relationship between the nut member and the slide member in the drive unit according to embodiment 1.

Fig. 6 is a perspective view of the sliding member according to embodiment 1.

Fig. 7 is a perspective view of the nut member according to embodiment 1.

Fig. 8 is a front view of the nut member according to embodiment 1.

Fig. 9 is a vertical cross-sectional view showing a contact state between the elastic portion of the nut member and the sliding member in embodiment 1.

Fig. 10 is a front view showing a state in which an external force acts on the elastic portion of embodiment 1.

Fig. 11 is a partial longitudinal sectional view showing a drive unit according to embodiment 2 of the present invention.

Fig. 12 is a partially enlarged longitudinal sectional view of the nut member and the sliding member according to embodiment 2 as viewed from a direction orthogonal to the axial direction of the screw.

Fig. 13 is a partially enlarged vertical cross-sectional view showing the arrangement relationship between the nut member and the slide member in embodiment 2.

Fig. 14 is a partial longitudinal sectional view showing a drive unit according to embodiment 3 of the present invention.

Fig. 15 is a schematic diagram showing the arrangement of the components of the drive unit according to modification 1 of the present invention.

Fig. 16 is a schematic diagram showing the arrangement of the components of the drive unit according to variation 2 of the present invention.

Fig. 17 is a schematic diagram showing the arrangement of the components of the drive unit according to variation 3 of the present invention.

Fig. 18 is a vertical cross-sectional view showing a contact state between an elastic portion and a sliding member of a nut member according to modification 4 of the present invention.

Fig. 19 is a vertical cross-sectional view showing a contact state of a nut member and an elastic portion of a slide member according to modification 5 of the present invention.

Fig. 20 is a perspective view showing a drive unit according to embodiment 4 of the present invention.

Fig. 21 is a partial vertical cross-sectional view showing the arrangement relationship between a nut member and a slide member in the drive unit according to embodiment 4.

Fig. 22 is a perspective view of the base portion of the slide member according to embodiment 4.

Fig. 23 is a perspective view of the nut member according to embodiment 4.

Fig. 24 is a front view of a nut member and a part of a base portion in embodiment 4.

Description of the reference numerals

10 8230a vehicle; 12 \ 8230and a dashboard; 14 \ 8230and windshield glass; 20\8230ahead-up display device; 21 \ 8230and frame body; 21A \8230atransmission part; 22 \ 8230a light emergent part; 22A \8230alight source; 22B 8230and liquid crystal display element; 23 \ 8230a first reflector; 24\8230anda second reflector; 25 \ 8230and a mirror body; 26 \ 8230a spectacle frame; 26A \8230anda main body part; 26B 8230a shaft part; 26C 8230and a held part; 28 \ 8230and shaft retainer; 29 \ 8230and torsion spring; 30 \ 8230and a driving unit; 32 \ 8230and a main body frame; 32A 8230; 32B 8230a bottom plate part; 32C 8230and a front wall part; 32D 8230and a rear wall portion; 33A 8230and a through hole; 33B 8230and a through hole; 34 \ 8230and lead screw; 36 \ 8230and motor; 38 \ 8230and a guide shaft; 39 \ 8230and a helical spring; 42 8230a sliding part; 44 8230a basal part; 45 8230a bottom wall; 46, 8230a leg part; 48 \ 8230and a guided part; 48A \8230athrough hole; 52 \ 8230and an open part; 53 \ 8230and inner wall; 54 \ 8230and longitudinal walls; 54A \8230alateral surface; 55 \ 8230and longitudinal walls; 55A \8230onthe side; 56 \ 8230and a concave part; 56A 8230and lower surface; 56B 8230and lateral surface; 56C 8230and an upper surface; 58, 8230a vertical part; 61 \ 8230a first upright part; 62 \ 8230and a second upright part; 63 \ 8230and a holding part; 64 \ 8230a holding part; 72 \ 8230and a nut component; 74 \ 8230and a nut main body part; 74A 8230and a threaded hole; 74B 8230and a plane part; 74C 8230and lateral surface; 74D 8230and lateral surface; 76 \ 8230and an insertion part; 77 \ 8230a first insertion part; 78, 8230a first arm part; 78A \8230onthe lower surface; 78B 8230while the other side is opposite; 79 \ 8230and a first contact part; 81, 8230a first protrusion; 82' \ 8230and a second insertion part; 83' \ 8230a second arm; 83A 8230and an upper surface; 83B 8230and opposite surface; 84, 8230a second contact part; 85, 8230and a second protrusion; 86 \ 8230and an extension part; 90 \ 8230and a driving unit; 92 \ 8230a sliding part; 94, 8230and a nut component; 100 \ 8230and a driving unit; 102, 8230a sliding part; 110, 8230and a driving unit; 112, 8230a sliding part; 120, 8230and a driving unit; 122 \ 8230a sliding part; 124 \ 8230and an insertion part; 124A 8230and upper part; 124B, 8230a lower part; 130 \ 8230and a driving unit; 132 \ 8230and an insertion part; 134 \8230aresilient part; 136, 8230and an elastic component; 136A (8230), lower bottom; 136B, 8230and an upper bottom; 136C, 8230a beveled edge part; 140, 8230and a driving unit; 141 \ 8230a sliding part; 142, 8230a base part; 143\8230, guided part; 144, 8230, open part; 144A \8230afirst open part; 144B 8230, a second open part; 144C 8230and an opening part; 145A 8230and an upper surface; 145B \8230andan upper inclined surface; 146A \ 8230and lower surface; 146B 8230and a lower inclined plane; 147 \ 8230and a bottom wall; 148 \ 8230and legs; 149, 8230and a through hole; 151 \ 8230and a side wall; 152 < 8230 >, a gap part; 153\8230athrough hole; 154, 8230a dividing wall; 155 \ 8230and a gap part; 156, 8230a longitudinal wall; 157, 8230and installing wall; 158 \ 8230and a limiting part; 162 \ 8230and a vertical part; 163 \ 8230and a hemispherical part; 166' \ 8230and a plate spring; 166A \8230aclamped part; 166B 8230and a bent part; 166C 8230and a displacement part; 172 \ 8230and a nut component; 173' \ 8230and a nut component; 174, 8230and a nut main body part; 174A 8230and lateral surface; 175, 8230a, an arm; 176, 8230, a first arm; 176A 8230and thick wall part; 176B 8230and a thin-wall part; 176C 8230and lower surface; 176D 8230while the opposite surface; 177 8230a helical spring; 178 8230a first protrusion; 178A \8230aend face; 179 \ 8230and a threaded hole; 179A \8230andan internal thread part; 182 \ 8230a first contact part; 182A \ 8230and a curved surface; 184\8230anda second arm part; 184A 8230and thick wall part; 184B 8230and a thin-wall part; 184C 8230and an upper surface; 184D 8230and opposite surface; 186,8230a second protrusion; 186A 8230and end face; 188, 8230, a second contact part; 188A 8230and curved surface; 192 \8230acylindrical part; 194, 8230a recess; 194A \8230alateral surface; 195A \ 8230a convex part; 195B 8230a convex part; 196, 8230and an extension part; 196A \8230andend face; 197 8230a remainder; a \ 8230a first central point; b\8230asecond center point; c8230at a third center point; CA 8230; central point; f1\8230, a first rotating force; f2 \ 8230and the second rotary force; g\8230avirtual line; h8230; k \ 8230and virtual line; r1, 8230a first distance; r2 \ 8230a second distance; q \8230anda virtual line; v8230and virtual image.

Detailed Description

[ embodiment 1]

Hereinafter, a head-up display device 20 and a driving unit 30 according to embodiment 1 will be described in detail with reference to the drawings as an example of the head-up display device and the driving device of the present invention.

In the following description, three axes orthogonal to each other are referred to as an X axis, a Y axis, and a Z axis, respectively, as shown in the respective drawings. The Z-axis direction corresponds to the vertical direction (the direction in which gravity acts). The X-axis direction and the Y-axis direction correspond to the horizontal direction. The front-rear direction of the vehicle 10 is referred to as the X-axis direction, the front side is referred to as the + X side, and the rear side is referred to as the-X side. The vehicle width direction of the vehicle 10 is defined as the Y-axis direction, and the left side in the state of facing the forward direction is referred to as the + Y side, and the right side is referred to as the-Y side. The vertical direction of the vehicle 10 is referred to as the Z-axis direction, and the upper side is referred to as the + Z side and the lower side is referred to as the-Z side.

As shown in fig. 1, a vehicle 10 includes an instrument panel 12, a windshield 14 as an example of a displayed portion, and a head-up display device 20.

The head-up display device 20 is configured to: the display light L, which is an example of light corresponding to information to be displayed, is projected from a light exit portion 22 (fig. 2) described later toward the windshield glass 14, which is an example of a projected portion, so that the occupant P of the vehicle 10 visually recognizes the virtual image V obtained by the projection.

[ head-up display device ]

As shown in fig. 2, the head-up display device 20 mainly includes a light emitting unit 22 as an example of an emitting unit, a second reflecting mirror 24 as an example of a reflecting member, and a driving unit 30 as an example of a driving device. The head-up display device 20 includes a housing 21, a first reflecting mirror 23, a shaft holder 28 (fig. 3), and a torsion spring 29 (fig. 3).

The housing 21 is formed in a box shape having a transmission portion 21A for transmitting the display light L to the + Z side. The shaft holders 28 are disposed at intervals in the Y-axis direction and fixed to the housing 21.

The light emitting section 22 includes a light source 22A including a light emitting diode and a liquid crystal display element 22B configured as a thin film transistor type display element and configured to transmit light from the light source 22A to form display light L. The light emitting section 22 emits the display light L.

The first reflecting mirror 23 reflects the display light L emitted from the light emitting portion 22 toward the second reflecting mirror 24.

The second reflector 24 has a reflector body 25 and a reflector frame 26. In addition, the second reflecting mirror 24 reflects the display light L from the first reflecting mirror 23 toward the windshield 14 (fig. 1). The mirror body 25 is formed as a concave mirror.

As shown in fig. 3, the lens holder 26 is a member in which a main body portion 26A, a pair of shaft portions 26B, and one held portion 26C are integrally molded. The held portion 26C is an example of a holding target. In other words, the second reflecting mirror 24 has the held portion 26C.

The body portion 26A is formed as a member elongated in the Y axis direction, and is attached to a surface of the mirror body 25 on the side opposite to the reflection surface side.

The pair of shaft portions 26B extend outward in the Y axis direction from portions that are both ends of the main body portion 26A in the Y axis direction and that become a center portion in the Z axis direction. The shaft portion 26B of one set is supported by the shaft holder 28 to be rotatable in the Y-axis direction.

The held portion 26C extends in a plate shape from a-Z-side end portion of the main body portion 26A to the-Z side, which is a central portion in the Y-axis direction, with the X-axis direction as a thickness direction.

The shaft portion 26B is inserted into the torsion spring 29. One end of the torsion spring 29 is attached to the main body portion 26A. The other end of the torsion spring 29 is attached to the shaft holder 28. Thereby, when the second reflecting mirror 24 is tilted from the initial position, an elastic force is applied in a direction to return the second reflecting mirror 24 to the initial position. The second reflecting mirror 24 is tilted by moving the held portion 26C in the X-axis direction by a driving unit 30 described later.

Drive unit

As shown in fig. 4, the driving unit 30 includes, as main components, a lead screw 34, a nut member 72, a slide member 42, a first arm portion 78, and a second arm portion 83 (fig. 7). The drive unit 30 includes a main body frame 32, a motor 36 as an example of a drive unit, a guide shaft 38, and a coil spring 39.

Further, the driving unit 30 changes the reflection angle of the display light L in the second reflecting mirror 24 by moving the sliding member 42 in the X-axis direction in a state where the sliding member 42 holds the second reflecting mirror 24 (fig. 3).

In the present embodiment, the example of the rotation shaft is the screw shaft 34, the example of the driven member is the nut member 72, and the example of the movable member is the slide member 42.

< body frame >

The main body frame 32 includes a vertical plate portion 32A, a bottom plate portion 32B, a front wall portion 32C, and a rear wall portion 32D. The main body frame 32 is an example of a support member, and supports the lead screw 34 and the guide shaft 38.

The vertical plate portion 32A is attached to the housing 21 (fig. 2).

The bottom plate portion 32B is an example of a wall portion, is disposed along the X-Y plane with the Z-axis direction as the thickness direction, and extends in the X-axis direction. The bottom plate portion 32B faces the slide member 42 in the Z-axis direction.

The front wall portion 32C stands along the Y-Z plane on the + X side of the bottom plate portion 32B. The rear wall portion 32D stands upright along the Y-Z plane on the-X side of the bottom plate portion 32B. The front wall 32C and the rear wall 32D have through holes 33A and 33B. The lead screw 34 is inserted through the through hole 33A. The guide shaft 38 is inserted through the through hole 33B.

< screw and motor >

The lead screw 34 extends from the front wall portion 32C to the rear wall portion 32D with the X-axis direction as the axial direction. the-X-side end of the lead screw 34 is connected to a motor 36. The end of the screw 34 on the + X side is rotatably supported by the front wall 32C. An external thread portion, not shown, is formed on the outer peripheral surface of the screw 34. The rotation center position of the screw 34 when viewed from the X-axis direction is referred to as a second center point B and is shown by point B (fig. 8).

The motor 36 is disposed on the-X side with respect to the rear wall portion 32D. Further, the motor 36 rotationally drives the lead screw 34 in the normal rotation direction or the reverse rotation direction.

< guide shaft >

The guide shaft 38 is formed in a cylindrical shape. The guide shaft 38 extends from the front wall portion 32C to the rear wall portion 32D in the X-axis direction at a position on the-Y side and the-Z side with respect to the screw shaft 34. In other words, the guide shaft 38 is arranged side by side with the lead screw 34 in an oblique direction intersecting the X-axis direction. As an example, the diameter of the guide shaft 38 is smaller than the diameter of the lead screw 34.

The guide shaft 38 is an example of a guide member and a guide shaft, and guides a slide member 42 described later in the X-axis direction as an example of the translation direction. The rotation center position of the guide shaft 38 viewed from the X-axis direction is referred to as a first center point a and is illustrated by a point a (fig. 5).

< helical spring >

The guide shaft 38 is inserted into the coil spring 39. The coil spring 39 is sandwiched in the X-axis direction by a slide member 42 described later and the front wall portion 32C. Thereby, when the coil spring 39 is compressed in the X-axis direction, the sliding member 42 is urged toward the-X side.

< sliding part >

The slide member 42 shown in fig. 5 has a base portion 44 constituting a portion lower than the center in the Z-axis direction and an upright portion 58 constituting a portion upper than the center. The slide member 42 is a member that, by its contact with a nut member 72 described later, translates the nut member 72 in the translation direction (X-axis direction) and the slide member 42 itself moves in the translation direction of the nut member 72.

(base)

The base 44 has a bottom wall 45, a leg 46, a guided portion 48, an open portion 52, and a recessed portion 56 when viewed from the + X side. In other words, the sliding member 42 is formed with the bottom wall 45, the leg portion 46, the guided portion 48, the open portion 52, and the recessed portion 56.

The bottom wall 45 is formed in a plate shape along the X-Y plane.

The leg portion 46 is an example of a restricting portion. The leg portions 46 project from both ends of the bottom wall 45 in the Y axis direction toward the bottom plate portion 32B on the side opposite to the holding portion 63 and the holding portion 64 (+ Z side) described later with respect to the guide shaft 38 when viewed in the X axis direction. The leg portion 46 is configured to restrict the rotation of the slide member 42 about the guide shaft 38 by coming into contact with the bottom plate portion 32B.

The guided portion 48 is a portion bulging toward the + Z side in the-Y direction with respect to the center of the bottom wall 45 in the Y-axis direction. The guided portion 48 is formed with a through hole 48A having a circular cross section and penetrating in the X axis direction. The guide shaft 38 is inserted into the through hole 48A. Thereby, the guided portion 48 is guided in the X-axis direction along the guide shaft 38.

The open portion 52 is formed as a space portion open to the + Y side in the bottom wall 45. In other words, the Y-Z cross section of the open portion 52 has a U-shape with the + Y side end being the open end. An inner wall 53 along the Z-axis direction is formed at a position of the open portion 52 which becomes the-Y side end.

The recess 56 is a portion recessed from the center of the inner wall 53 in the Z-axis direction toward the-Y side, and opens toward the + Y side. In other words, the slide member 42 is formed with a recessed portion 56 recessed in the Y-axis direction, which is an example of a crossing direction crossing the rotation direction of the screw 34. Specifically, the recessed portion 56 is a space portion surrounded by a lower surface 56A along the X-Y plane, a side surface 56B standing upright on the-Y side end of the lower surface 56A toward the + Z side, and an upper surface 56C extending from the + Z side end of the side surface 56B toward the + Y side, as viewed from the X-axis direction. In addition, as an example, the recessed portion 56 is formed on the + Z side with respect to the guided portion 48 on the base portion 44.

As shown in fig. 6, the open portion 52 is formed with a vertical wall 54 and a vertical wall 55 that divide a part of the space in the open portion 52 into three spaces arranged in the X-axis direction. The vertical wall 54 is disposed on the + X side with respect to the center of the base 44 in the X axis direction. The vertical wall 55 is disposed on the-X side with respect to the center of the base 44 in the X axis direction. The vertical walls 54 and 55 have the same size and shape, and the vertical walls 54 and 55 are arranged at intervals in the X-axis direction. The distance between the vertical walls 54 and 55 in the X axis direction is narrower on the-Y side than on the + Y side.

Further, the vertical walls 54 and 55 are formed in a U-shaped cross section that opens to the + Y side when viewed from the X-axis direction. The lead screw 34 (fig. 5) is rotatably inserted into the inner portions of the vertical walls 54 and 55 in the X-axis direction. Here, the surface on the-X side of the vertical wall 54 is referred to as a side surface 54A, and the surface on the + X side of the vertical wall 55 is referred to as a side surface 55A. A nut member 72 (fig. 5) described later is disposed between the side surface 54A and the side surface 55A. Further, a recessed portion 56 is formed on the inner wall 53 between the side surface 54A and the side surface 55A. Further, the recessed portion 56 and the leg portion 46 are arranged side by side in the Z-axis direction when viewed from the Y-axis direction.

(upright part)

The upright portion 58 stands upright on the base portion 44 in the Z-axis direction. Specifically, the upright portion 58 has a first upright portion 61 and a second upright portion 62 facing each other in the X-axis direction. The first standing portion 61 and the second standing portion 62 are disposed symmetrically with respect to the center of the slide member 42 in the X-axis direction.

A holding portion 63 protruding toward the-X side is formed on the + Z-side end and the-X side surface of the first standing portion 61. The tip of the holding portion 63 is formed in a hemispherical shape. Similarly, a holding portion 64 protruding toward the + X side is formed on the + Z side end and the + X side surface of the second upright portion 62. The tip of the holding portion 64 is formed in a hemispherical shape.

The distance between the holding portions 63 and 64 in the X axis direction is such a size that the held portion 26C (fig. 3) can be sandwiched in the X axis direction. The holding portions 63 and 64 hold the second reflecting mirror 24 by sandwiching the held portion 26C in the X-axis direction (fig. 3). The position of the apex of the hemisphere of the holding portion 63 and the holding portion 64 when viewed in the X-axis direction is referred to as a third center point C (fig. 5).

< nut component >

As shown in fig. 7, the nut member 72 is provided with a nut body 74, an insertion portion 76, and an extension portion 86.

(nut body part)

The nut body 74 is formed in a substantially annular shape when viewed from the X-axis direction. The nut body 74 has a threaded hole 74A penetrating in the X-axis direction. An internal thread portion, not shown, is formed in the screw hole 74A. The female screw portion is screwed to a male screw portion of a lead screw 34 (fig. 5). Thereby, the rotational force of the lead screw 34 is converted into a translational force that translates the nut member 72 in the X-axis direction.

A + Z-side end and a-Z-side end of the outer periphery of the nut body 74 are formed with flat surface portions 74B along the X-Y plane. In the nut body 74, the end surface on the-X side is referred to as a side surface 74C, and the end surface on the + X side is referred to as a side surface 74D.

(insert part)

As shown in fig. 8, the insertion portion 76 extends outward (Y side) from the-Y side end of the nut body 74. The insertion portion 76 is inserted into the recess 56 (fig. 5). Specifically, the insertion portion 76 includes a first insertion portion 77 and a second insertion portion 82 disposed on the + Z side with respect to the first insertion portion 77. The first insertion portion 77 and the second insertion portion 82 have substantially the same size and shape. The first insertion portion 77 and the second insertion portion 82 are opposed to each other in the Z-axis direction, which is an example of the rotation direction of the lead screw 34, and can be brought into contact with and separated from each other in the Z-axis direction.

The first insertion portion 77 and the second insertion portion 82 are arranged such that: when inserted into the recessed portion 56 (fig. 5) in the Y-axis direction, an elastic force (restoring force of elastic deformation) is applied to the recessed portion 56. In other words, the first insertion portion 77 and the second insertion portion 82 are press-fitted into the recessed portion 56 and are slidable in the Y-axis direction with respect to the slide member 42.

The first insertion portion 77 extends from the outer peripheral surface of the nut body 74 toward the-Y side in the Y-axis direction (radial direction of the screw 34). The first insertion portion 77 includes a first arm portion 78, a first contact portion 79, and a first protrusion portion 81.

The first arm portion 78 is formed in a plate shape having the Z-axis direction as the thickness direction. The first arm portion 78 is an example of an elastic portion, and is formed in the nut main body portion 74 in a cantilever shape, whereby the free end side (-Y side) can be elastically deformed in the Z-axis direction. The first arm portion 78 is a portion that elastically deforms as the insertion portion 76 and the recessed portion 56 (fig. 5) come into contact in the rotational direction of the lead screw 34. The elasticity is a property of an object whose shape is changed by an external force to return to its original state again when the external force is removed.

The first contact portion 79 is an example of a curved surface portion, and protrudes from the lower surface 78A on the-Z side out of the-Y side end portions of the first arm portion 78 toward the-Z side. In addition, the first contact portion 79 is formed in a hemispherical shape. When the insertion portion 76 is inserted into the recess 56, the top of the first contact portion 79 contacts the lower surface 56A (fig. 5).

The first projecting portion 81 is an example of a projecting portion, and projects from the + Z side facing surface 78B of the-Y side end portion of the first arm portion 78 toward the + Z side. The first projecting portion 81 is formed over the entire width direction (X-axis direction) of the first arm portion 78. The amount of projection of the first projecting portion 81 is set to be substantially the same as the amount of projection of the first contact portion 79.

The second insertion portion 82 extends from the outer peripheral surface of the nut body 74 toward the-Y side in the Y-axis direction (radial direction of the lead screw 34). The second insertion portion 82 includes a second arm portion 83, a second contact portion 84, and a second protrusion portion 85.

The second arm portion 83 is formed in a plate shape having the Z-axis direction as the thickness direction. The second arm portion 83 is an example of an elastic portion, and is formed in the nut body portion 74 in a cantilever shape, whereby the free end side (-Y side) can be elastically deformed in the Z-axis direction. The second arm portion 83 is a portion that elastically deforms as the insertion portion 76 and the recessed portion 56 (fig. 5) come into contact in the rotational direction of the lead screw 34.

The second contact portion 84 is an example of a curved portion, and protrudes from the + Z-side upper surface 83A of the-Y-side end portion of the second arm portion 83 toward the + Z side. In addition, the second contact portion 84 is formed in a hemispherical shape. When the insertion portion 76 is inserted into the recess 56, the top of the second contact portion 84 contacts the upper surface 56C (fig. 5).

The second projecting portion 85 is an example of a projecting portion, and projects from the-Z-side facing surface 83B of the-Y-side end of the second arm portion 83 toward the-Z side. The second projecting portion 85 is formed over the entire width direction (X-axis direction) of the second arm portion 83. The amount of projection of the second projecting portion 85 is set to be substantially the same as the amount of projection of the second contact portion 84.

The second insertion portion 82 is disposed on the opposite side of the guide shaft 38 (fig. 5) with respect to a virtual line K that passes through the second center point B and that extends along the Y-axis direction, the virtual line K being a virtual line intersecting the axial center line of the screw 34. For example, the first insertion portion 77 is disposed on the virtual line K.

Here, the insertion portion 76 shown in fig. 5 is inserted into the recessed portion 56 and is in contact with the recessed portion 56, whereby the nut member 72 is prevented from idling relative to the slide member 42 when the lead screw 34 rotates.

The nut member 72 receives a rotational force from the lead screw 34 due to the rotation of the lead screw 34, and is restricted from rotating by contact with the recessed portion 56, thereby being translated in the X-axis direction.

(extension part)

As shown in fig. 8, a projecting portion 86 is formed on the outer peripheral portion of the nut main body portion 74 at a position on the opposite side (+ Y side) of the screw shaft 34 from the insertion portion 76 side (-Y side) when viewed in the X-axis direction. The extension 86 extends away from the lead screw 34. The protruding portion 86 is formed in a plate shape having the Z-axis direction as the thickness direction.

In the present embodiment, the extension portion 86 is disposed on the virtual line K. In other words, the protruding portion 86 extends in the radial direction of the lead screw 34, and is juxtaposed in the Y-axis direction with the first insertion portion 77. The thickness of the protruding portion 86 is set to a thickness to such an extent that the protruding portion 86 is not elastically deformed when the operator pinches the protruding portion 86.

< description of operation and effects of embodiment 1 >

As shown in fig. 9, the first insertion portion 77 and the second insertion portion 82 are inserted (press-fitted) into the recessed portion 56 in the Y-axis direction, and thereby the elastic force F is applied to the lower surface 56A and the upper surface 56C. At this time, a gap is formed between the first insertion portion 77 and the second insertion portion 82. The first insertion portion 77 and the second insertion portion 82 are slidable in the X-axis direction and the Y-axis direction with respect to the lower surface 56A and the upper surface 56C.

In the drive unit 30 shown in fig. 5, when the lead screw 34 rotates, the nut member 72 moves (translates) in the axial direction (X-axis direction) of the lead screw 34. The slide member 42 moves in the axial direction (X-axis direction) of the guide shaft 38. The rotation of the nut member 72 about the screw bar 34 is restricted by its contact with the slide member 42.

The lead screw 34 and the guide shaft 38 are disposed in a state deviated from the parallel state due to a dimensional error and an assembly error. Therefore, when the nut member 72 is moved in the X-axis direction, the position of the nut member 72 relative to the guide shaft 38 is not constant but varies.

Here, the insertion portion 76 of the nut member 72 is elastically deformed while the depressed portion 56 maintains the press-fitted state, so that the nut member 72 slides in the Y-axis direction with respect to the slide member 42. This absorbs the displacement of the nut member 72 due to the error of the lead screw 34 and the guide shaft 38, and therefore, the nut member 72 and the slide member 42 can be moved in the X-axis direction. In other words, the torque of the electric motor 36 (fig. 4) can be suppressed from becoming large.

(1) As described above, according to the drive unit 30, when the nut member 72 comes into contact with the slide member 42 in the rotation direction of the lead screw 34, the first insertion portion 77 and the second insertion portion 82 (fig. 8) are elastically deformed, and the nut member 72 is allowed to move, i.e., slide, relative to the slide member 42 while maintaining the contact state between the slide member 42 and the nut member 72. Thus, when the slide member 42 moves in accordance with the translation of the nut member 72, repeated contact and separation between the nut member 72 and the slide member 42 can be suppressed even if the relative positions of the nut member 72 and the slide member 42 change, and therefore, the rocking of the slide member 42 and the contact noise between the slide member 42 and the nut member 72 can be suppressed.

Further, according to the drive unit 30, when the insertion portion 76 is inserted into the recessed portion 56, even if the position of the insertion portion 76 with respect to the recessed portion 56 is slightly deviated, the insertion portion 76 is inserted in conformity with the recessed portion 56 because the first insertion portion 77 and the second insertion portion 82 (fig. 8) are elastically deformed. Thus, the arrangement of the insertion portion 76 with respect to the recessed portion 56 at the time of assembly does not require a high degree of positional accuracy as compared with a structure in which a member that does not elastically deform is press-fitted into the recessed portion 56, and therefore the drive unit 30 can be easily manufactured.

(2) Further, according to embodiment 1, since the first insertion portion 77 and the second insertion portion 82 are formed in the nut member 72 that directly receives the rotational force from the lead screw 34, and the amount of deformation in the elastic deformation can be easily grasped, the elastic portions of the first insertion portion 77 and the second insertion portion 82 can be easily formed.

(3) Further, according to embodiment 1, the nut member 72 and the slide member 42 can be in contact in the range where the insertion portion 76 is inserted into the recessed portion 56, so that the contact area between the nut member 72 and the slide member 42 can be increased as compared with a structure without the recessed portion 56.

(4) Further, according to embodiment 1, since the first contact portion 79 and the second contact portion 84 are hemispherical curved surfaces, the surfaces that contact the contacted surfaces (the lower surface 56A and the upper surface 56C) on the sliding member 42 side are hemispherical surfaces, which are an example of curved surfaces. Accordingly, even if the angles of the first contact portion 79 and the second contact portion 84 with respect to the surface to be contacted on the sliding member 42 side are changed, the contact state between the surface to be contacted and the hemispherical surface can be maintained, and thus, variation in the contact area between the sliding member 42 and the first contact portion 79 and the second contact portion 84 can be suppressed.

(5) Further, according to embodiment 1, since there is a space between the first insertion portion 77 and the second insertion portion 82 and there is no elastic portion, it is possible to secure a deformation stroke as the insertion portion 76 as compared with a configuration using one large insertion portion.

(6) Further, according to embodiment 1, since the slide member 42 is guided by the guide shaft 38, the movement of the slide member 42 in the translational direction is stabilized, and therefore, the positional variation of the slide member 42 in the plane intersecting the translational direction can be suppressed. Further, since the second insertion portion 82 is disposed on the opposite side of the virtual line K from the guide shaft 38 side, a space is secured on the guide shaft 38 side, and therefore the guide shaft 38 can be disposed close to the nut member 72. Thus, when the slide member 42 is rotated about the guide shaft 38 as a fulcrum, the position where the nut member 72 and the slide member 42 contact each other is arranged close to the guide shaft 38, and the rotation is suppressed, so that the rotational force can be suppressed from acting on the slide member 42.

(7) In addition, according to embodiment 1, as shown in fig. 10, when an external force acts on at least one of the first insertion portion 77 and the second insertion portion 82 in a direction in which the first insertion portion 77 and the second insertion portion 82 approach (for example, when an operator pinches the first insertion portion 77 and the second insertion portion 82 in the Z-axis direction), the first protruding portion 81 and the second protruding portion 85 come into contact. Accordingly, the first insertion portion 77 and the second insertion portion 82 do not come too close to each other, and therefore excessive deformation of at least one of the first insertion portion 77 and the second insertion portion 82 can be suppressed.

(8) In addition, according to embodiment 1, in the assembly work of the drive unit 30, when the insertion portion 76 is inserted into the recess portion 56, the nut member 72 is held by the operator pinching the protruding portion 86. This makes it possible to insert the insertion portion 76 into the recessed portion 56 more easily than a structure without the protruding portion 86.

(9) In addition, according to the head-up display device 20 of embodiment 1, the same operational effects as those of the above-described driving unit 30 can be obtained.

[ embodiment 2]

Next, the head-up display device 20 and the driving unit 30 according to embodiment 2 will be described as an example of the head-up display device and the driving device of the present invention. Note that the same reference numerals are given to portions common to embodiment 1, and the description thereof is omitted.

In the drive unit 30 of embodiment 2 shown in fig. 11, the distance from the first center point a to the second center point B is set to a first distance r1 [ mm ] when viewed from the X-axis direction. The distance from the first center point a to the third center point C is set as a second distance r2 [ mm ]. A virtual force acting on the second center point B is defined as a first rotational force F1 [ N ], where the first rotational force F1 is a resultant force of forces generated by friction at a contact portion between the nut member 72 and the sliding member 42. The force acting on the third center point C is defined as a second rotational force F2 [ N ], and the second rotational force F2 is generated by friction at the contact portions between the holding portions 63 and 64 and the held portion 26C (fig. 3). In fig. 11, hatching of the cross section is omitted.

Here, the first distance r1, the second distance r2, the first rotational force F1, and the second rotational force F2 satisfy the relationship F1 × r1 < F2 × r2.

Further, the third center point C is located on a virtual line G passing through the second center point B and along the vertical direction (Z-axis direction) when viewed from the X-axis direction. In other words, the second center point B and the third center point C are located on the virtual line G. The second center point B is located lower (on the Z side) than the third center point C in the Z axis direction.

< description of operation and effects of embodiment 2 >

In the drive unit 30 shown in fig. 12, a case where the nut member 72 moves toward the-X side in accordance with the rotation of the lead screw 34 (clockwise rotation when viewed from the + X side) will be described as an example. In this case, the side surface 74C of the nut member 72 contacts the side surface 55A of the slide member 42, and presses the side surface 55A toward the-X side. Thereby, the slide member 42 moves to the-X side. A surface including a position where the side surface 74C and the side surface 55A contact is referred to as a virtual surface S. The virtual surface S is along the Y-Z plane.

In fig. 13, as a part of the virtual surface S (fig. 12), a contact surface SA between the nut member 72 and the sliding member 42 is shown by a hatched area. In the contact surface SA, a frictional force acts between the nut member 72 and the slide member 42 as the nut member 72 rotates by the action of the rotational force from the lead screw 34 and the nut member 72 moves (slides) in the Y-axis direction relative to the slide member 42. In fig. 13, hatching of the cross section is omitted.

(1) According to the head-up display device 20 and the drive unit 30 of embodiment 2, the nut member 72 is in contact with the slide member 42, and the slide member 42 is moved in the X-axis direction. Further, the slide member 42 is guided in the X-axis direction by the guide shaft 38. Thereby, the second mirror 24 (fig. 2) moves (tilts) in the X-axis direction.

Here, the first rotational force F1 and the first distance r1 generated by friction at the contact portion between the nut member 72 and the slide member 42 and the second rotational force F2 and the second distance r2 generated by friction at the contact portion between the holding portion 63 and the holding portion 64 and the held portion 26C (fig. 12) shown in fig. 11 satisfy the relational expression F1 × r1 < F2 × r2.

In other words, the rotation (turning) of the slide member 42 generated by the force received from the nut member 72 is suppressed by the second rotational force F2 of the contact portions of the holding portion 63 and the holding portion 64 and the held portion 26C. This can suppress rotation (rotation) of the slide member 42 about the first center point a.

(2) Further, according to embodiment 2, since the second center point B and the third center point C are located on the virtual line G, the space required for arranging the slide member 42 and the nut member 72 in the horizontal direction is smaller than in the configuration in which the second center point B and the third center point C are arranged offset in the horizontal direction. This makes it possible to reduce the size of the head-up display device 20.

(3) Further, according to embodiment 2, the screw shaft 34 is disposed below the slide member 42. Accordingly, when the screw shaft 34 is driven by using a driving unit such as the motor 36, the driving unit having a large mass is disposed below the Z-axis direction (vertical direction), so that the center of gravity of the head-up display device 20 can be lowered and the operation of the head-up display device 20 can be stabilized.

(4) In addition, according to embodiment 2, since the holding portion 63 and the holding portion 64 sandwich the held portion 26C in the X-axis direction, when the slide member 42 moves in the X-axis direction, the holding portion 63 or the holding portion 64 exists in the moving direction (+ X side, -X side) of the held portion 26C. This can prevent the position of the held portion 26C from being shifted from the positions of the holding portions 63 and 64 with the movement of the slide member 42.

(5) In addition, according to embodiment 2, when the amount of rotation of the slide member 42 about the guide shaft 38 becomes large, the leg portion 46 comes into contact with the bottom plate portion 32B of the main body frame 32, and the rotation of the slide member 42 is stopped. This can suppress excessive rotation of the slide member 42.

[ embodiment 3]

Next, the head-up display device 20 and the driving unit 90 according to embodiment 3 will be described as an example of the head-up display device and the driving device according to the present invention. Note that the same reference numerals are given to portions common to embodiments 1 and 2, and descriptions thereof are omitted.

In the drive unit 30 according to embodiment 2, the drive unit 90 according to embodiment 3 shown in fig. 14 includes a slide member 92 instead of the slide member 42 (fig. 13) and a nut member 94 instead of the nut member 72 (fig. 13), and the other configurations are the same.

The slide member 92 does not form the recess 56 in the slide member 42 (fig. 13), but rather is formed with a continuous inner wall 93.

The nut member 94 does not have the insertion portion 76 and the protruding portion 86 (fig. 13) of the nut member 72 (fig. 13), but has a curved surface in which the outer peripheral surfaces thereof are continuous in the Y-axis direction.

In the driving unit 90, the first distance r1, the second distance r2, the first rotational force F1, and the second rotational force F2 satisfy the relation F1 × r1 < F2 × r2. The second center point B is located lower (on the minus Z side) than the third center point C in the Z axis direction.

< description of operation and Effect of embodiment 3 >

In the drive unit 90 shown in fig. 14, when the lead screw 34 is rotated in the clockwise direction as shown, the nut member 94 will rotate together with the lead screw 34 in the clockwise direction as shown. Further, a part of the outer periphery of the nut member 94 contacts a part of the wall surface of the open portion 52. The side surface of the nut member 94 on the-X side presses the side surface 55A toward the-X side. Thereby, the slide member 92 moves to the-X side.

Here, the first rotational force F1 due to the counterclockwise friction shown in the figure acts on the contact portion between the nut member 94 and the slide member 92, but is suppressed by the second rotational force F2 at the contact portion between the holding portion 63, the holding portion 64, and the held portion 26C (fig. 3). This can suppress rotation (rotation) of the slide member 92 about the first center point a. Note that the same operational effects as those of embodiment 2 will not be described.

[ embodiment 4]

Next, the head-up display device 20 and the driving unit 140 according to embodiment 4 will be described as an example of the head-up display device and the driving device according to the present invention. Note that the same reference numerals are given to portions common to embodiments 1, 2, and 3, and descriptions thereof are omitted. The same operations and effects as those of embodiments 1, 2, and 3 may be omitted from the description.

As shown in fig. 20, in the head-up display device 20 (fig. 2) according to embodiment 1, the driving unit 140 according to embodiment 4 is provided in place of the driving unit 30.

The drive unit 140 includes, as its main components, a lead screw 34, nut members 172 and 173, a slide member 141, a first arm 176, and a second arm 184 (fig. 23). In addition, the driving unit 140 includes, as an example, the main body frame 32, the motor 36 (fig. 4), and the guide shaft 38.

The driving unit 140 moves the sliding member 141 in the X-axis direction while the sliding member 141 holds the second reflecting mirror 24 (fig. 3), thereby changing the reflection angle of the display light L in the second reflecting mirror 24.

< sliding part >

The slide member 141 is an example of a movable member, and includes a base portion 142 that constitutes a main body of the slide member 141, an upright portion 162 that stands from the base portion 142 to the + Z side, and a leaf spring 166 that is attached to the base portion 142 and faces the upright portion 162 in the X-axis direction. The sliding member 141 is a member that causes the nut member 172 and the nut member 173 to translate in the translational direction (X-axis direction) by contact with the nut member 172 and the nut member 173, which will be described later, and the sliding member 141 itself moves in the translational direction of the nut member 172 and the nut member 173.

(base)

As shown in fig. 22, the base portion 142 includes a guided portion 143, a bottom wall 147, a leg portion 148, and a vertical wall 156. In addition, an open portion 144 is formed in the base portion 142.

The guided portion 143 is a portion formed in a block shape. The guided portion 143 has a through hole 153 (fig. 21) having a circular cross section and penetrating in the X-axis direction. The through hole 153 is located at a substantially central portion of the guided portion 143 in the Y axis direction. The guide shaft 38 (fig. 20) is inserted through the through hole 153. Thereby, the guided portion 143 is guided in the X-axis direction along the guide shaft 38.

The bottom wall 147 is formed in a plate shape along the X-Y plane and is located on the-Z side with respect to the guided portion 143.

The leg portion 148 is an example of a restriction portion. The leg portions 148 project from both ends of the bottom wall 147 in the Y axis direction toward the bottom plate portion 32B (fig. 4). The leg portion 148 is configured to restrict the rotation of the slide member 141 about the guide shaft 38 by coming into contact with the bottom plate portion 32B.

The opening portion 144 is an example of a housing portion, and houses a nut member 172 and a nut member 173, which will be described later. Specifically, the opening portion 144 is located between the bottom wall 147 and the guided portion 143, and is formed as a space portion that is open to the + Y side. In other words, the Y-Z cross section of the opening 144 has a trapezoidal shape with the + Y side end forming the opening 144C.

The opening 144C is open in the Y direction (+ Y side) and is located at a position corresponding to the bottom of the trapezoid. The open portion 144 is divided into a first open portion 144A and a second open portion 144B by a partition wall 154 described later.

The first open portion 144A is located on the + X side with respect to the dividing wall 154. The second open portion 144B is located on the-X side with respect to the dividing wall 154. For example, the first opening portion 144A has a width in the X-axis direction larger than that of the second opening portion 144B.

The vertical wall 156 is erected toward + Z side at a position on the-Y side of the center of the bottom wall 147 in the Y axis direction. The end of the vertical wall 156 on the + Z side is connected to the guided portion 143. In other words, the vertical wall 156 constitutes an inner wall of the-Y side of the open portion 144.

An upper surface 145A and an upper inclined surface 145B are formed at the-Z-side end of the guided portion 143. In addition, as an example, the upper surface 145A and the upper inclined surface 145B are formed in both the first opening part 144A and the second opening part 144B. As an example, upper surface 145A is a plane along the X-Y plane.

The upper inclined surface 145B is an example of a contact surface and an inclined surface with the second arm portion 184 described later, and the end portion on the + Y side of the upper inclined surface 145B is inclined to the + Z side from the end portion on the-Y side of the upper inclined surface 145B. In other words, the upper inclined surface 145B is inclined in a direction intersecting the Y-axis direction when viewed from the X-axis direction. The angle at which the upper inclined surface 145B is inclined with respect to the X-Y plane is set to an angle at which the second contact portion 188 and the upper inclined surface 145B can be brought into contact with each other, which will be described later, and the nut members 172 and 173 (fig. 20) can be easily inserted toward the-Y side. In this way, the upper inclined surface 145B is inclined such that the space of the opening 144 is expanded as it approaches the opening 144C in the Y-axis direction.

For example, the boundary between the upper surface 145A and the upper inclined surface 145B is located on the + Y side with respect to the position of the screw 34 (fig. 20).

A lower surface 146A and a lower inclined surface 146B are formed at the end of the bottom wall 147 on the + Z side. In addition, as an example, the lower surface 146A and the lower inclined surface 146B are formed in both the first open portion 144A and the second open portion 144B. As an example, lower surface 146A is a plane along the X-Y plane.

The lower inclined surface 146B is an example of a contact surface and an inclined surface with the first arm portion 176 described later, and an end portion on the + Y side of the lower inclined surface 146B is inclined to the-Z side with respect to an end portion on the-Y side of the lower inclined surface 146B. In other words, the lower inclined surface 146B is inclined in a direction intersecting the Y-axis direction when viewed from the X-axis direction. The angle at which the lower inclined surface 146B is inclined with respect to the X-Y plane is set to an angle at which the first contact portion 182 and the lower inclined surface 146B can be brought into contact with each other, which will be described later, and at which the nut members 172 and 173 (fig. 20) can be easily inserted toward the-Y side. In this way, the lower inclined surface 146B is inclined such that the space of the opening portion 144 is expanded as it approaches the opening portion 144C in the Y axis direction.

For example, the boundary between the lower surface 146A and the lower inclined surface 146B is located on the + Y side with respect to the position of the screw 34 (fig. 20).

The partition wall 154 is formed in a plate shape having a predetermined thickness in the X-axis direction. In addition, the dividing wall 154 divides the open portion 144 into a first open portion 144A and a second open portion 144B in the X-axis direction. A notch 155 cut toward the-Y side is formed in the partition wall 154.

The notch 155 is formed in a U shape having an opening facing + Y side. In other words, the partition wall 154 has a U-shape as viewed from the X-axis direction. The first opening portion 144A and the second opening portion 144B are connected via the notch portion 155. A side wall 151 is formed on the-X side with respect to the second open portion 144B.

The side wall 151 is formed in a plate shape having a predetermined thickness in the X-axis direction. The side wall 151 forms a second opening 144B together with the guided portion 143, the bottom wall 147, and the partition wall 154. The side wall 151 is formed with a notch 152 cut toward the-Y side.

The notch 152 is formed in a U shape having an opening facing + Y side. In other words, the side wall 151 has a U-shape as viewed from the X-axis direction.

The lead screw 34 (fig. 20) is inserted into the inside of the notch portion 152 and the inside of the notch portion 155.

An attachment wall 157 that stands upright toward the + Z side is formed in a portion of the guided portion 143 on the + X side with respect to the center in the X axis direction.

As an example, the mounting wall 157 is formed of a plate-shaped portion having a predetermined thickness in the X-axis direction and a plate-shaped portion having a predetermined thickness in the Y-axis direction. The mounting wall 157 is provided with a restricting portion 158 for restricting movement of a leaf spring 166 (fig. 20) described later.

(upright part)

As shown in fig. 20, the rising portion 162 rises toward + Z from a portion of the guided portion 143 on the-X side with respect to the center in the X-axis direction. The upright portion 162 is formed in a plate shape having a predetermined thickness in the X-axis direction. The upright portion 162 is formed with a hemispherical portion 163 protruding from the upright portion 162 to the + X side.

(leaf spring)

As an example, the plate spring 166 has a clamped portion 166A, a curved portion 166B, and a displacement portion 166C. The clamped portion 166A is clamped in the X-axis direction by the mounting wall 157 (fig. 22) and the restricting portion 158. The bent portion 166B is formed in a U shape at the + Z side end of the clamped portion 166A as viewed in the Y axis direction. The displacement portion 166C is configured to be displaced to the + X side by receiving an external force.

Here, the displacement portion 166C is disposed opposite to the hemispherical portion 163 in the X axis direction. Then, the displacement portion 166C biases the held portion 26C toward the hemispherical portion 163. In other words, the upright portion 162 and the plate spring 166 sandwich the held portion 26C in the X-axis direction.

As shown in fig. 21, a through hole 149 that penetrates the base 142 in the X-axis direction is formed in a portion of the base 142 on the-Y side with respect to the vertical wall 156. The through hole 149 is a lightening hole when the base 142 is formed by injection molding. The through hole 149 is formed in a rectangular shape when viewed from the X-axis direction.

As an example, the center position of the lead screw 34, the center position of the guide shaft 38, and the center position of the hemispherical portion 163 are aligned in the Z-axis direction when viewed from the + X side.

< nut component >

As shown in fig. 20, the nut member 172 is housed in the first opening portion 144A and is translated in the X-axis direction as the lead screw 34 rotates. The nut member 173 is housed in the second opening portion 144B and translates in the X-axis direction as the lead screw 34 rotates. The nut member 172 and the nut member 173 are examples of driven members, and are made of resin.

A coil spring 177 is provided between the nut member 172 and the nut member 173. The coil spring 177 is capable of expanding and contracting in the X-axis direction. In this way, the nut member 172 and the nut member 173 are disposed in a tightened state with respect to the screw shaft 34 by receiving the elastic force from the coil spring 177, and therefore positional fluctuations in the Y-Z plane with respect to the screw shaft 34 are suppressed.

In addition, as an example, the nut member 172 and the nut member 173 are formed in a symmetrical shape with respect to a virtual plane, not shown, along the Y-Z plane. Therefore, the nut member 172 will be specifically described, and the description of the nut member 173 will be omitted.

As shown in fig. 23, the nut member 172 includes, as an example, a nut body 174, an arm portion 175, a cylindrical portion 192, a recess 194, and an extension 196.

The arm 175 is an example of a shank, and includes a first arm 176 and a second arm 184 that are opposed to each other in the rotation direction of the nut member 172 and are capable of contacting and separating from each other.

The first arm 176 has a first protrusion 178 and a first contact 182.

The second arm 184 has a second protrusion 186 and a second contact 188.

(nut body part)

The nut body portion 174 is an example of a translation portion, and translates by receiving a rotational force from the lead screw 34. Specifically, the nut body 174 is formed in a block shape having a dimension in the Y-axis direction and a dimension in the Z-axis direction larger than a dimension in the X-axis direction. A screw hole 179 penetrating in the X axis direction is formed in the nut body 174. A female screw portion 179A is formed in the screw hole 179. The female screw portion 179A is screwed to a male screw portion (not shown) of the screw shaft 34 (fig. 20). Thereby, the rotational force of the lead screw 34 is converted into a translational force that translates the nut member 172 in the X-axis direction.

The surface on the + Y side of the nut body 174 and the surface between the first arm 176 and the second arm 184, which will be described later, are referred to as a side surface 174A.

(first arm part)

The first arm portion 176 is an example of an elastic portion, and extends from a portion on the minus Z side of the center in the Z axis direction of the + Y side end portion of the nut main body portion 174 to the + Y side in the Y axis direction. The first arm portion 176 is formed in a plate shape having the thickness direction in the Z-axis direction. Further, the first arm portion 176 has a thick portion 176A and a thin portion 176B.

The thick portion 176A is a portion of the first arm portion 176 located on the nut body portion 174 side (Y side) with respect to the center in the Y axis direction. The thick portion 176A is a portion whose thickness in the Z-axis direction gradually increases toward the nut body 174.

The thin portion 176B is a portion of the first arm 176 located on the + Y side with respect to the center in the Y axis direction. The thin portion 176B is a portion thinner in the Z-axis direction than the thick portion 176A.

A lower surface 176C of the first arm 176 on the-Z side is slightly inclined with respect to the Y axis direction such that a + Y side end of the lower surface 176C is closer to the + Z side than the-Y side end.

A surface of the first arm portion 176 facing the second arm portion 184 in the Z direction is an opposed surface 176D.

(first projection)

The first protruding portion 178 is an example of a protruding portion, and protrudes from the facing surface 176D of the + Y-side end portion of the first arm portion 176 toward the + Z side. In other words, the first projection 178 is formed on the opposed surface 176D. The first protrusion 178 is formed over the entire width direction (X-axis direction) of the first arm 176. The first protrusion 178 is formed in a plate shape having a predetermined thickness in the Y-axis direction. An end surface 178A is formed at the + Z-side end of the first protrusion 178. The end surface 178A is located on the-Z side with respect to the center of the screw hole 179 in the Z-axis direction.

(first contact part)

The first contact portion 182 is an example of a contact portion and a curved surface portion between the first arm portion 176 and the slide member 141, and protrudes from the lower surface 176C to the-Z side at the + Y-side end of the thin portion 176B. The first contact portion 182 is formed in a hemispherical shape and has a curved surface 182A. When the nut member 172 is received in the first open portion 144A, the top of the first contact portion 182 contacts the lower inclined surface 146B (fig. 22).

(second arm part)

The second arm portion 184 is an example of an elastic portion, and extends from a portion on the + Z side of the + Y side end portion of the nut main body portion 174 in the Z axis direction to the + Y side in the Y axis direction. The second arm 184 is formed in a plate shape having a thickness direction in the Z-axis direction. The second arm 184 has a thick portion 184A and a thin portion 184B.

The thick portion 184A is a portion of the second arm portion 184 located on the nut body portion 174 side (Y side) with respect to the center in the Y axis direction. The thick portion 184A is a portion whose thickness in the Z-axis direction gradually increases toward the nut body 174.

The thin portion 184B is a portion of the second arm portion 184 located on the + Y side with respect to the center in the Y-axis direction. Thin portion 184B is a portion thinner in the Z-axis direction than thick portion 184A.

The + Z-side upper surface 184C of the second arm 184 is slightly inclined with respect to the Y-axis direction such that the + Y-side end of the upper surface 184C is closer to the-Z side than the-Y-side end.

A surface of the second arm portion 184 facing the first arm portion 176 in the Z direction is a facing surface 184D.

In the present embodiment, as an example, the length of the first arm portion 176 in the Y axis direction and the length of the second arm portion 184 in the Y axis direction are each approximately three times the diameter of the screw hole 179.

(second projection)

The second protruding portion 186 is an example of a protruding portion, and protrudes from the facing surface 184D of the + Y-side end portion of the second arm portion 184 toward the-Z side. In other words, the second protruding portion 186 is formed at the opposed face 184D. The second protruding portion 186 is formed over the entire width direction (X-axis direction) of the second arm portion 184. The second protruding portion 186 is formed in a plate shape having a predetermined thickness in the Y axis direction. An end surface 186A is formed at the-Z-side end of the second projection 186. The end surface 186A is located on the + Z side with respect to the center of the screw hole 179 in the Z-axis direction.

The first and second protrusions 178 and 186 can contact and separate from each other in the Z-axis direction.

(second contact part)

The second contact portion 188 is an example of a contact portion and a curved surface portion between the second arm portion 184 and the slide member 141, and protrudes from the upper surface 184C to the + Z side at the + Y side end of the thin portion 184B. The second contact portion 188 is formed in a hemispherical shape and has a curved surface 188A. When the nut member 172 is received in the first open portion 144A, the top of the second contact portion 188 contacts the upper inclined surface 145B (fig. 22).

(Cartridge part)

The cylindrical portion 192 extends from the nut body 174 toward the-X side. The cylindrical portion 192 is formed in a cylindrical shape. The cylindrical portion 192 has an internal thread portion 179A formed therein. The cylindrical portion 192 has a width in the X axis direction larger than the width of the nut body 174 in the X axis direction.

(concave part)

As shown in fig. 24, the recess 194 is a portion recessed from the-Y-side end surface of the nut body 174 toward the + Y side. In other words, the recess 194 is formed in the nut main body portion 174 on the side opposite to the side on which the arm portion 175 is formed. In the recess 194, a gate, not shown, formed in the resin molding of the nut member 172 is removed.

A surface constituting the bottom portion of the recess 194 on the + Y side is a side surface 194A. A projection 195A projecting further to the-Y side than the side surface 194A is formed on the-Z side with respect to the side surface 194A. A convex portion 195B that protrudes further to the-Y side than the side surface 194A is formed on the + Z side with respect to the side surface 194A.

The projection amount of the projection 195A in the Y axis direction and the projection amount of the projection 195B in the Y axis direction are substantially the same. The projections 195A and 195B face the vertical wall 156 at intervals in the Y-axis direction. As an example, an excess portion 197 that remains when a gate, not shown, is formed during the cutting and molding is formed on the side surface 194A. The remainder 197 is inside the recess 194.

(extension part)

The protruding portion 196 is formed in the nut main body portion 174 on the side (+ Y side) opposite to the recess 194 side (-Y side) when viewed from the X-axis direction. Specifically, the protruding portion 196 protrudes from the center portion of the side surface 174A in the Z-axis direction to the + Y side. the-X side end surface 196A (fig. 23) of the protruding portion 196 is a plane along the Y-Z plane. The end of the coil spring 177 (fig. 20) on the + X side contacts the end surface 196A. In this way, the contact area between the nut body 174 and the coil spring 177 is ensured by forming the projecting portion 196.

As an example, the second arm 184, the second projection 186, and the second contact portion 188 are configured to be symmetrical with the first arm 176, the first projection 178, and the first contact portion 182 with respect to a virtual line Q that passes through the center CA of the screw hole 179 and is along the Y-axis direction, as viewed from the X-axis direction.

The nut member 172 receives a rotational force from the lead screw 34 by the rotation of the lead screw 34, and restricts the rotation by the contact with the upper inclined surface 145B and the lower inclined surface 146B, thereby translating in the X-axis direction.

< description of operation and Effect of embodiment 4 >

When the driving unit 140 shown in fig. 20 is assembled, the slide member 141 approaches the nut member 172 and the nut member 173 through which the lead screw 34 is inserted from the-Y side. Then, the nut member 172 is received in the first opening portion 144A, and the nut member 173 is received in the second opening portion 144B. Since the nut member 173 can obtain the same function as the nut member 172, the description of the nut member 173 will be omitted hereinafter.

When the nut member 172 is received in the first open portion 144A, the first contact portion 182 contacts the lower inclined surface 146B and the second contact portion 188 contacts the upper inclined surface 145B in the nut member 172.

Here, when the reaction force acts on the first contact portion 182 and the second contact portion 188 from the slide member 141, the first arm portion 176 and the second arm portion 184 elastically deform in the direction in which they approach each other in the Z-axis direction, and therefore the nut member 172 can be easily accommodated in the first opening portion 144A. Further, since the first and second arm portions 176 and 184 that have been elastically deformed return to their original states and the restoring forces act on the first and second contact portions 182 and 188, the contact state between the first contact portion 182 and the lower inclined surface 146B and the contact state between the second contact portion 188 and the upper inclined surface 145B can be maintained.

According to the drive unit 140, when the nut members 172 and 173 contact the slide member 141 in the rotation direction of the lead screw 34, the first arm 176 and the second arm 184 elastically deform, and thereby the nut members 172 and 173 are allowed to move, i.e., slide, relative to the slide member 141 while maintaining the contact state between the slide member 141 and the nut members 172 and 173. Thus, when the slide member 141 moves in accordance with the translation of the nut members 172 and 173, the nut members 172 and 173 can be prevented from repeatedly coming into contact with and separating from the slide member 141 even if the relative positions of the nut members 172 and 173 and the slide member 141 change, and hence the slide member 141 can be prevented from wobbling and the slide member 141 can be prevented from coming into contact with the nut members 172 and 173.

According to the drive unit 140, since the first arm portion 176 and the second arm portion 184 extend in the Y-axis direction and the first arm portion 176 and the second arm portion 184 are in the cantilever state, the elastic deformation amount of the first arm portion 176 and the second arm portion 184 can be secured.

Further, according to the driving unit 140, since the first arm 176 and the second arm 184 and the first contact portion 182 and the second contact portion 188 of the slide member 141 are curved surfaces, the surfaces thereof contacting the upper inclined surface 145B and the lower inclined surface 146B on the slide member 141 side are curved surfaces 182A and a curved surface 188A. Accordingly, even if the angles of the first arm portion 176 and the second arm portion 184 with respect to the upper inclined surface 145B and the lower inclined surface 146B on the sliding member 141 side are changed, the contact state between the upper inclined surface 145B and the lower inclined surface 146B and the curved surfaces 182A and 188A is maintained, and therefore, variation in the contact area between the sliding member 141 and the first arm portion 176 and the second arm portion 184 can be suppressed.

According to the driving unit 140, the space of the opening portion 144 is enlarged as the driving unit approaches the opening portion 144C, so that the nut members 172 and 173 can be easily inserted into the opening portion 144 through the opening portion 144C.

In addition, according to the drive unit 140, since there is a space between the first arm portion 176 and the second arm portion 184, there is no elastic portion between the first arm portion 176 and the second arm portion 184, and therefore, the deformation stroke of the shank portion can be secured as compared with a configuration using one large shank portion.

According to the driving unit 140, when an external force acts on at least one of the first arm portion 176 and the second arm portion 184 in a direction in which the first arm portion 176 and the second arm portion 184 approach, the first protruding portion 178 and the second protruding portion 186 come into contact. Accordingly, the first arm portion 176 and the second arm portion 184 do not come too close to each other, and therefore, excessive deformation of at least one of the first arm portion 176 and the second arm portion 184 can be suppressed.

In addition, according to the drive unit 140, when a gate, not shown, is removed from the recess 194, an excess 197 which is a part of the gate remains in the recess 194. In other words, since the remaining portion 197 is prevented from protruding outward from the nut body 174, the remaining portion 197 can be prevented from contacting the sliding member 141.

[ modifications of the invention ]

The head-up display device 20, the driving unit 30, the driving unit 90, and the driving unit 140 according to the embodiments of the present invention have the above-described configuration, but it is needless to say that a partial configuration may be modified or omitted without departing from the scope of the present invention.

< modification 1 >

Fig. 15 schematically shows the arrangement of the respective components in a drive unit 100 according to modification 1 of the drive device. The drive unit 100 mainly includes a lead screw 34, a guide shaft 38, a nut member, not shown, having an insertion portion 76, a holding portion 63 and a holding portion 64, and a slide member 102. The slide member 102 is represented as a rectangular member that is long in the Z-axis direction when viewed from the X-axis direction. In the figure, arrows indicate a state in which a force acts on the slide member 102 through the insertion portion 76. The dashed line in the drawing indicates another modification after the positions of the insertion portion 76, the holding portion 63, and the holding portion 64 are changed.

The first center point a is located on the + Y side and the-Z side with respect to the center point M when the slide member 102 is viewed from the X-axis direction. The second center point B is located-Y side and-Z side with respect to the center point M, and-Y side and-Z side with respect to the first center point A. The third center point C is located on the + Y side and the + Z side with respect to the center point M, and is located on the + Z side with respect to the first center point a. The insertion portion 76 is located on the + Z side with respect to the first center point a and on the-Z side with respect to the third center point C. The same operational effects as those of the embodiments can be obtained also in the drive unit 100 in which the respective components are arranged in this manner. Further, the insertion portion 76 may be located on the-Z side with respect to the first center point a. The holding portions 63 and 64 may be located on the-Y side and the + Z side with respect to the center point M.

< modification 2 >

Fig. 16 schematically shows the arrangement of each component in a drive unit 110 according to modification 2 of the drive device. The drive unit 110 includes, as main components, the lead screw 34, the guide shaft 38, a nut member, not shown, having the insertion portion 76, the holding portions 63 and 64, and the slide member 112. The slide member 112 is represented as a rectangular member that is long in the Z-axis direction when viewed from the X-axis direction. Further, the arrows in the drawing indicate a state in which a force acts on the slide member 112 through the insertion portion 76. The dashed line in the drawing indicates another modification after the position of the insertion portion 76 is changed.

The first center point a is located on the + Y side and the-Z side with respect to the center point M when the slide member 112 is viewed from the X-axis direction. The second center point B is located on the-Y side and the-Z side with respect to the center point M, and is located on the-Y side and the + Z side with respect to the first center point A. The third center point C is located on the + Z side with respect to the center point M, and is located on the-Y side and the + Z side with respect to the first center point A. The insertion portion 76 is located on the + Y side and the + Z side with respect to the first center point a. The same operational effects as those of the embodiments can be obtained also in the drive unit 110 in which the respective components are arranged in this manner. Further, the insertion portion 76 may be located on the-Y side and the-Z side with respect to the first center point A.

< modification 3 >

Fig. 17 schematically shows the arrangement of the components in a drive unit 120 according to variation 3 of the drive device. The drive unit 120 includes, as main components, a lead screw 34, a guide shaft 38, a nut member, not shown, having an insertion portion 76, a holding portion 63 and a holding portion 64, and a slide member 122. The slide member 122 is represented as a rectangular member that is long in the Z-axis direction when viewed from the X-axis direction. Further, the arrows in the drawing indicate a state in which a force acts on the slide member 122 through the insertion portion 76. The dotted line portion in the figure indicates another modification after the position of the insertion portion 76 is changed.

The first center point a is located on the + Y side with respect to the center point M when the slide member 122 is viewed from the X-axis direction. The second center point B is located on the + Z side with respect to the center point M, and is located on the-Y side and the + Z side with respect to the first center point A. The third center point C is located on the-Y side and the-Z side with respect to the center point M, and is located on the-Y side and the-Z side with respect to the first center point A. The insertion portion 76 is located on the-Z side with respect to the first center point a. The driving unit 120 having the respective components arranged in this manner can also obtain the same operational effects as those of the respective embodiments. Further, the insertion portion 76 may be disposed on the-Y side and the-Z side with respect to the first center point a, and the force may act in an oblique direction intersecting the Z-axis direction.

< modification 4 >

Fig. 18 shows an insertion portion 124 as a modification of the insertion portion 76 (fig. 9) as a modification 4.

The insertion portion 124 is formed in a cylindrical shape with the Y-axis direction as the axial direction. In the insertion portion 124, a semicircular portion on the + Z side with respect to a virtual line H passing through a point CA representing the central axis and along the X-axis direction is referred to as an upper portion 124A. The semicircular part on the-Z side with respect to the virtual line H is referred to as a lower part 124B. The top of upper portion 124A contacts upper surface 56C. The bottom of lower portion 124B contacts lower surface 56A. Further, the insertion portion 124 is not in contact with the recessed portion 56 in the X-axis direction.

The insertion portion 124 is inserted (pressed) into the recess 56, and thereby the elastic force F acts on the lower surface 56A and the upper surface 56C. Since the insertion portion 124 is cylindrical, a space is formed between the upper portion 124A and the lower portion 124B, and therefore, the stroke of elastic deformation of the upper portion 124A and the lower portion 124B is ensured. The insertion portion 124 is slidable in the X-axis direction and the Y-axis direction with respect to the lower surface 56A and the upper surface 56C. In this way, the insertion portions may be collectively formed in one portion, and the elastic force F may be applied to the + Z side and the-Z side of the recessed portion 56.

< modification 5 >

Fig. 19 shows a part of the driving unit 130 as a modification 5 of the driving device. In the driving unit 30 (fig. 5), the driving unit 130 replaces the insertion portion 76 (fig. 5) of the nut member 72 with the insertion portion 132. The elastic portion 134 is fitted to a portion of the slide member 42 including the lower surface 56A and the upper surface 56C so as to be partially exposed to the recessed portion 56.

The insertion portion 132 is formed in a cylindrical shape having the Y-axis direction as the axial direction. In other words, the insertion portion 132 is formed as a solid portion, and is a portion that is difficult to elastically deform.

As an example, the elastic portion 134 is formed of a pair (two) of upper and lower elastic members 136. The two elastic members 136 are disposed symmetrically on the-Z side and the + Z side with respect to the insertion portion 132.

As an example, the elastic member 136 is formed in a hollow prism shape when viewed from the Y axis direction. In addition, as an example, the elastic member 136 is formed in a trapezoidal shape as viewed from the Y-axis direction, and has a lower bottom portion 136A, an upper bottom portion 136B, and two oblique side portions 136C. The two upper bottom portions 136B and the four chamfered portions 136C are fixed to the slide member 42 by adhesion.

The two lower bottom portions 136A are disposed at intervals in the Z-axis direction, and contact the outer peripheral surface of the insertion portion 132 in the Z-axis direction. In addition, since the elastic members 136 are hollow, the two lower bottom portions 136A can be elastically deformed in the Z-axis direction. In this way, even in the configuration in which the elastic member 136 is formed in the recessed portion 56 of the slide member 42, the elastic member 136 elastically deforms, and thereby the sliding of the nut member 72 with respect to the slide member 42 is allowed while the contact state between the slide member 42 and the nut member 72 is maintained, so that the swinging of the slide member 42 and the contact sound between the movable member and the driven member can be suppressed.

< other modification >

In the drive unit 30, the elastic portion may be formed in both the recess portion 56 and the insertion portion 76.

The first contact portion 79 and the second contact portion 84 are not limited to the curved portions having a hemispherical shape, and may be curved portions other than a hemispherical shape, or may be formed to have a flat surface and a corner portion. The first contact portion 79 and the second contact portion 84 are not limited to extending in the Y-axis direction from the nut main body portion 74, and may be branched at a distal end portion of a single portion extending outward from the outer peripheral portion of the nut main body portion 74. The nut member 72 may not have the extension 86.

The member of the first insertion portion 77 and the second insertion portion 82 disposed on the opposite side of the virtual line K from the guide shaft 38 is not limited to the second insertion portion 82, and may be the first insertion portion 77 and the second insertion portion 82. In the configuration in which the first insertion portion 77 and the second insertion portion 82 are interchanged, only the first insertion portion 77 may be disposed on the opposite side of the virtual line K from the guide shaft 38 side. The first and second protruding portions 81 and 85 may not be formed in the first and second insertion portions 77 and 82.

A plurality of the insertion portions 76 may be formed on the X axis.

In the head-up display device 20 according to embodiment 2, the second center point B or the third center point C may be arranged so as to be shifted in the Y-axis direction from the virtual line G along the vertical direction when viewed from the X-axis direction. As in modification 3, the second center point B may be located above the third center point C.

The holding portions 63 and 64 may be arranged at intervals in the X-axis direction, and may be configured to contact the held portion 26C when the slide member 42 moves in the X-axis direction.

The leg portion 46 is not limited to contact with the bottom plate portion 32B, and may be disposed at a distance from the bottom plate portion 32B in the Z-axis direction. The leg portion 46 may not be formed in the slide member 42.

Each elastic portion may be made of any of rubber, resin, and metal.

In the drive unit 140, there may be one arm 175. The contact portion between the arm 175 and the slide member 141 may be a flat surface portion. Instead of the lower inclined surface 146B and the upper inclined surface 145B, a plane along the X-Y plane may be formed. One of the first projection 178 and the second projection 186 may not be formed in the arm portion 175. In addition, both the first protruding portion 178 and the second protruding portion 186 may not be formed. In the nut member 172 and the nut member 173, when the gate-removed portion is formed at a position not facing the slide member 141, the recess 194 may not be formed.

Claims (11)

1. A drive device, comprising:

a rotating shaft rotated by a driving part,

a driven member receiving a rotational force from the rotational shaft;

a movable member that translates the driven member and moves in a direction of translation of the driven member by contact of the movable member with the driven member; and

an elastic portion formed on at least one of the driven member and the movable member and elastically deformed in accordance with contact between the driven member and the movable member in a rotation direction of the rotary shaft,

a recess is formed in the movable member,

an insertion portion inserted into the recess portion is formed on the driven member,

the elastic part is formed at the insertion part,

the insertion portion has a first insertion portion and a second insertion portion that are opposed to each other in the rotation direction and are capable of contacting and separating from each other.

2. The drive device according to claim 1,

the contact portion of the insertion portion with the movable member is a curved surface portion.

3. The drive device according to claim 1,

a guide member is provided that guides the movable member in the translational direction,

at least one of the first insertion portion and the second insertion portion is disposed on a side opposite to the guide member with respect to a virtual line intersecting an axial center line of the rotary shaft.

4. The drive device according to claim 1,

a protruding portion is formed on an opposing surface of at least one of the first insertion portion and the second insertion portion.

5. The drive device according to claim 1,

a protruding portion that protrudes to a side away from the rotation shaft is formed in a portion of the driven member opposite to the insertion portion side with respect to the rotation shaft.

6. A drive device, comprising:

a rotating shaft rotated by a driving part,

a driven member receiving a rotational force from the rotational shaft;

a movable member that translates the driven member and moves in a direction of translation of the driven member by contact of the movable member with the driven member; and

an elastic portion formed on at least one of the driven member and the movable member and elastically deformed in accordance with contact between the driven member and the movable member in a rotation direction of the rotary shaft,

the driven member has a translation portion that translates by receiving a rotational force from the rotational shaft,

the elastic portion is at least one shank portion extending from the translation portion in a crossing direction crossing the rotation direction,

the shank has a first shank and a second shank opposed to each other in the rotation direction and capable of being brought into contact with and separated from each other.

7. The drive device according to claim 6,

the contact portion of the shank portion with the movable member is a curved surface portion.

8. The drive device according to claim 6,

a receiving portion for receiving the driven member is formed in the movable member,

the housing section has an opening section that opens in the intersecting direction,

a contact surface of the housing portion with the shank portion is an inclined surface inclined in a direction intersecting the intersecting direction when viewed from the translation direction,

the inclined surface is inclined such that the space of the housing portion is enlarged as the inclined surface approaches the opening portion in the intersecting direction.

9. The drive device according to any one of claims 6 to 8,

a protruding portion is formed on an opposing surface of at least one of the first shank portion and the second shank portion.

10. The drive device according to claim 6,

the driven member is made of a resin,

a recess from which a gate formed in resin molding is removed is formed in the translation portion on the side opposite to the side on which the shank is formed.

11. A head-up display device is characterized by comprising:

an emission unit that emits light corresponding to information displayed on a displayed unit;

a reflecting member that reflects the light of the emission portion toward the displayed portion; and

the drive device according to claim 1 or 6, wherein the movable member holds the reflecting member, and the movable member is moved in the translational direction to change a reflection angle of light in the reflecting member.

Images