JP7577497B2 - Drive device and head-up display device - Google Patents

Description

The present invention relates to a drive device that moves a movable member using the driving force of a drive unit, and a head-up display device that includes the drive device.

Conventionally, a drive device is known in which a slider that is movable along a fixed shaft is brought into contact with a driven member that moves with the rotation of an output shaft, thereby moving the slider in the axial direction (Patent Document 1).

JP 2019-210940 A

As with the drive device described in Patent Document 1, there is a drive device that has a driven member that translates upon receiving a rotational force from a rotating shaft, and a movable member that moves in the translational direction by contacting the driven member, and the driven member and movable member are in contact in the rotational direction. In this configuration, the rotation of the driven member is suppressed by the movable member, but the rotational force acting on the driven member is not constant. For this reason, the rotational force transmitted from the driven member to the movable member fluctuates, which may make the movable member more likely to oscillate. In addition, the movable member and the driven member may separate as the movable member oscillates, and the movable member and the driven member may come into contact again, which may make contact noise more likely to occur.

The object of the present invention is to provide a drive device and a head-up display device that can suppress the oscillation of the movable member and the contact noise between the movable member and the driven member in a configuration in which the movable member moves in conjunction with the translation of the driven member.

In order to solve the above problems, the drive device of the present invention is characterized in having a rotating shaft rotated by a driving unit, a driven member that receives a rotational force from the rotating shaft, a movable member that translates the driven member and moves in the translation direction of the driven member by contact with the driven member, and an elastic portion formed on at least one of the driven member and the movable member, which elastically deforms in response to contact between the driven member and the movable member in the rotational direction of the rotating shaft.
According to this aspect, when the driven member comes into contact with the movable member in the rotational direction, the elastic portion formed on at least one of the driven member and the movable member is elastically deformed, thereby allowing the driven member to move, i.e., slide, relative to the movable member while maintaining the contact state between the movable member and the driven member. As a result, even if the relative position between the driven member and the movable member fluctuates when the movable member moves in accordance with the translation of the driven member, the driven member is prevented from repeatedly coming into contact with and separating from the movable member, so that the oscillation of the movable member and the contact noise between the movable member and the driven member can be suppressed.

In the driving device according to the present invention, 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 receives a rotational force directly from the rotating shaft, making it easier to grasp the amount of deformation in elastic deformation, and therefore making it easier to form the elastic portion.

In addition, in the above-mentioned driving device of the present invention, it is preferable that a recess portion is formed in the movable member, an insertion portion is formed in the driven member to be inserted into the recess portion, and the elastic portion is formed in at least one of the recess portion and the insertion portion.
According to the present aspect, the driven member and the movable member can come into contact within the range in which the insertion portion is inserted into the recess, thereby increasing the contact area between the driven member and the movable member compared to a configuration that does not have the recess.

In the present invention, in the above drive device, it is preferable that a contact portion of the insertion portion with the movable member is a curved portion.
According to this aspect, since the contact portion of the insertion portion with the movable member is the curved portion, the curved surface comes into contact with the contacted surface of the movable member. As a result, even if the angle of the elastic portion with respect to the contacted surface of the movable member changes, the contact state between the contacted surface and the curved surface is maintained, so that the variation in the contact area between the movable member and the elastic portion can be suppressed.

Further, in the drive device according to the present invention, it is preferable that the elastic portion is formed in the insertion portion, and the insertion portion has a first insertion portion and a second insertion portion which face each other in the rotational direction and are movable toward and away from each other.
According to the present aspect, there is a space between the first insertion portion and the second insertion portion, and the elastic portion does not exist, so that the deformation stroke of the insertion portion can be secured compared to a configuration that uses a single large insertion portion.

In the present invention, in the above-mentioned drive device, a guide member is provided to guide the movable member in the translation direction, and at least one of the first insertion portion and the second insertion portion is arranged on the opposite side of the guide member with respect to a virtual line intersecting the axial line of the rotation shaft.
According to this aspect, the movable member is guided by the guide member, so that the movement of the movable member in the translation direction is stabilized, and the positional fluctuation of the movable member in a plane intersecting the translation direction can be suppressed. Furthermore, 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 the guide member can be disposed close to the driven member. As a result, when the movable member is rotated around the guide member as a fulcrum, the rotation is suppressed by disposing the position where the driven member and the movable member come into contact close to the guide member, and therefore the application of a rotational force to the movable member can be suppressed.

In the drive device according to the present invention, it is preferable that a protrusion 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 and second insertion parts in a direction in which the first and second insertion parts approach each other, the protrusion comes into contact with the first or second insertion part or the other protrusion, thereby preventing the first and second insertion parts from approaching each other excessively, thereby suppressing excessive deformation of at least one of the first and second insertion parts.

Further, in the drive device according to the present invention, it is preferable that a protrusion protruding toward a side away from the rotation shaft is formed on a portion of the driven member opposite the insertion portion side with respect to the rotation shaft.
According to this aspect, when the insertion portion is inserted into the recess during assembly of the drive device, the protruding portion is pinched to hold the driven member, making it easier to insert the insertion portion into the recess compared to a configuration without the protruding portion.

In addition, in the above-mentioned drive device of the present invention, it is preferable that the driven member has a translation portion that is translated by receiving a rotational force from the rotation shaft, and the elastic portion is at least one arm portion extending from the translation portion in a transverse direction that intersects the rotation direction.
According to this aspect, the arm portion extends in the intersecting direction, and thus the arm portion is in a cantilever state, so that the amount of elastic deformation of the arm portion can be secured.

In the present invention, in the above drive device, it is preferable that a contact portion of the arm with the movable member is a curved portion.
According to this aspect, since the contact portion of the arm with the movable member is the curved portion, the curved surface comes into contact with the contacted surface of the movable member. As a result, even if the angle of the arm with respect to the contacted surface of the movable member changes, the contact state between the contacted surface and the curved surface is maintained, so that it is possible to suppress fluctuations in the contact area between the movable member and the arm.

In addition, in the above-mentioned drive device, the present invention is preferably such that a storage section for storing the driven member is formed in the movable member, the storage section has an opening that opens in the intersecting direction, and when viewed from the translation direction, the contact surface of the storage section with the arm portion is an inclined surface inclined in a direction intersecting the intersecting direction, and the inclined surface is inclined so that the space of the storage section becomes wider the closer it is to the opening in the intersecting direction.
According to this aspect, the storage section has a space that becomes wider as it approaches the opening, which makes it easier to insert the driven member into the storage section through the opening.

Furthermore, in the drive device according to the present invention, it is preferable that the arm portion has a first arm portion and a second arm portion which face each other in the rotational direction and are movable toward and away from each other.
According to the present aspect, since there is a space between the first arm portion and the second arm portion, and the elastic portion does not exist between the first arm portion and the second arm portion, the deformation stroke of the arm portion can be secured compared to a configuration using one large arm portion.

In the drive device according to the present invention, it is preferable that a protrusion is formed on an opposing surface of at least one of the first arm portion and the second arm portion.
According to this aspect, when an external force acts on at least one of the first arm portion and the second arm portion in a direction in which the first arm portion and the second arm portion approach each other, the protrusion comes into contact with the first arm portion, the second arm portion, or the other protrusion, thereby preventing the first arm portion and the second arm portion from approaching each other excessively, thereby making it possible to suppress excessive deformation of at least one of the first arm portion and the second arm portion.

Furthermore, in the above-mentioned drive device according to the present invention, it is preferable that the driven member is made of resin, and a recess is formed on the side of the translation section opposite to the side on which the arm portion is formed, allowing a gate formed during resin molding to be removed.
According to this aspect, when the gate is removed from within the recess, a portion of the gate remains within the recess. In other words, the remaining portion of the gate is prevented from protruding outward from the translation portion, and therefore the remaining portion of the gate can be prevented from coming into contact with the movable member.

The present invention also relates to a head-up display device comprising: an emission section that emits light corresponding to information to be displayed on a displayed section; a reflective member that reflects the light from the emission section toward the displayed section; and a drive device described in any one of claims 1 to 14, in which the movable member holds the reflective member and changes the reflection angle of light at the reflective member by moving the movable member in the translation direction.
According to this aspect, it is possible to obtain the same effects as any one of the above-mentioned aspects.

According to the present invention, in a configuration in which a driven member and a movable member slide against each other, when the movable member moves, it is possible to suppress the oscillation of the movable member and the contact noise between the movable member and the driven member.

1 is an overall configuration diagram showing an overview of a vehicle equipped with a head-up display device having a drive unit according to a first embodiment of the present invention. FIG. 2 is a side cross-sectional view showing an internal configuration of the head-up display device according to the first embodiment. 2 is a perspective view illustrating a second reflecting mirror, a mirror holder, and a driving unit according to the first embodiment. FIG. FIG. 2 is a perspective view showing a drive unit according to the first embodiment. 4 is a partial vertical cross-sectional view illustrating a positional relationship between a nut member and a slide member in the drive unit according to the first embodiment. FIG. FIG. 2 is a perspective view of a slide member according to the first embodiment. FIG. 2 is a perspective view of a nut member according to the first embodiment. FIG. 2 is a front view of the nut member according to the first embodiment. 5 is a vertical cross-sectional view showing a contact state between an elastic portion of the nut member and a slide member according to the first embodiment. FIG. 4 is a front view illustrating a state in which an external force is applied to the elastic portion according to the first embodiment. FIG. FIG. 10 is a partial vertical cross-sectional view showing a drive unit according to a second embodiment of the present invention. 11 is a partially enlarged longitudinal sectional view of a nut member and a slide member according to the second embodiment, as viewed from a direction perpendicular to the axial direction of a guide screw. FIG. FIG. 11 is a partially enlarged vertical cross-sectional view showing the positional relationship between a nut member and a slide member according to the second embodiment. FIG. 10 is a partial vertical cross-sectional view showing a drive unit according to a third embodiment of the present invention. FIG. 11 is a schematic diagram showing an arrangement of each member of a drive unit according to a first modified example of the present invention. FIG. 11 is a schematic diagram showing an arrangement of each member of a drive unit according to a second modified example of the present invention. FIG. 11 is a schematic diagram showing an arrangement of each member of a drive unit according to a third modified example of the present invention. 13 is a vertical cross-sectional view showing a contact state between an elastic portion of a nut member and a slide member according to a fourth modified example of the present invention. FIG. 13 is a vertical cross-sectional view showing a contact state between a nut member and an elastic portion of a slide member according to a fifth modified example of the present invention. FIG. FIG. 10 is a perspective view illustrating a drive unit according to a fourth embodiment of the present invention. 13 is a partial vertical cross-sectional view showing the positional relationship between a nut member and a slide member in a drive unit according to the fourth embodiment. FIG. FIG. 11 is a perspective view of a base portion of a slide member according to the fourth embodiment. FIG. 11 is a perspective view of a nut member according to the fourth embodiment. FIG. 11 is a front view of a part of the nut member and the base according to the fourth embodiment.

[Embodiment 1]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A head-up display device 20 and a drive unit 30 according to a first embodiment will be described below in detail with reference to the accompanying drawings as an example of a head-up display device and a drive device according to the present invention.
In the following description, the three mutually orthogonal axes are referred to as the X-axis, Y-axis, and Z-axis, respectively, as shown in each drawing. 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 width direction of the vehicle 10 is referred to as the Y-axis direction, and the left side in the traveling direction is referred to as the +Y side, and the right side is referred to as the -Y side. The up-down direction of the vehicle 10 is referred to as the Z-axis direction, 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 display target portion, and a head-up display device 20 .
The head-up display device 20 is configured to project display light L, an example of light corresponding to the information to be displayed, from a light emitting unit 22 (Figure 2) described later toward the windshield 14, an example of a projected portion, and to allow an occupant P of the vehicle 10 to view a virtual image V obtained by this projection.

[Head-up display device]
2, the head-up display device 20 includes, as main parts, a light emitting part 22 as an example of an emitting part, a second reflecting mirror 24 as an example of a reflecting member, and a drive unit 30 as an example of a drive device. The head-up display device 20 also includes a housing 21, a first reflecting mirror 23, an axis 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 that transmits the display light L toward 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 has 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 transmitting 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 reflecting mirror 24 has a mirror body 25 and a mirror holder 26. The second reflecting mirror 24 also reflects the display light L from the first reflecting mirror 23 toward the windshield 14 (Figure 1). The mirror body 25 is formed as a concave mirror.

3, the mirror holder 26 is configured as 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 an object to be held. In other words, the second reflection mirror 24 has the held portion 26C.
The main body 26A is a member that is long in the Y-axis direction, and is attached to the surface of the mirror main body 25 opposite to the reflecting surface side.

The pair of shafts 26B extend outward in the Y-axis direction from both ends of the main body 26A in the Y-axis direction and the center in the Z-axis direction. The pair of shafts 26B are supported by a shaft holder 28 so as to be rotatable around the Y-axis direction.
The held portion 26C extends in a plate shape from a portion that is the -Z side end of the main body portion 26A and the center in the Y axis direction toward the -Z side with the X axis direction as its 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. This provides an elastic force in the direction of returning the second reflection mirror 24 to its initial position when the second reflection mirror 24 is tilted from its initial position. The second reflection mirror 24 is tilted by the drive unit 30, which will be described later, moving the held portion 26C in the X-axis direction.

<<Drive unit>>
4, the drive unit 30 has, as its main parts, 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 further has a main body frame 32, a motor 36 as an example of a drive portion, a guide shaft 38, and a coil spring 39.
In addition, the drive unit 30 changes the reflection angle of the display light L at the second reflection mirror 24 by moving the slide member 42 in the X-axis direction while the slide member 42 holds the second reflection mirror 24 (FIG. 3).
In this embodiment, an example of a rotating shaft is the lead screw 34 , an example of a driven member is the nut member 72 , and an example of a movable member is the slide member 42 .

<Main 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, and is disposed along the XY plane and extends in the X-axis direction with the Z-axis direction being its thickness direction. The bottom plate portion 32B also faces the slide member 42 in the Z-axis direction.

The front wall portion 32C stands upright 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. Through holes 33A and 33B are formed in the front wall portion 32C and the rear wall portion 32D. A lead screw 34 is inserted into the through hole 33A. A guide shaft 38 is inserted into the through hole 33B.

<Lead screw and motor>
The lead screw 34 extends from the front wall 32C to the rear wall 32D with its axial direction being the X-axis direction. The -X side end of the lead screw 34 is connected to the motor 36. The +X side end of the lead screw 34 is rotatably supported by the front wall 32C. A male thread (not shown) is formed on the outer circumferential surface of the lead screw 34. The rotation center position of the lead screw 34 when viewed from the X-axis direction is referred to as a second center point B, and is illustrated as point B ( FIG. 8 ).
The motor 36 is provided on the −X side of the rear wall portion 32 D. The motor 36 also drives the lead screw 34 to rotate in the forward or reverse direction.

<Guide shaft>
The guide shaft 38 is formed in a cylindrical shape. The guide shaft 38 extends from the front wall 32C to the rear wall 32D with the X-axis direction as the axial direction at a position on the -Y side and -Z side of the lead screw 34. In other words, the guide shaft 38 is disposed alongside the lead screw 34 in an oblique direction intersecting with the X-axis direction. The diameter of the guide shaft 38 is, for example, 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, which is an example of a translation direction. The position of the rotation center of the guide shaft 38 when viewed from the X-axis direction is referred to as a first center point A, and is illustrated as point A ( FIG. 5 ).

<Coil spring>
The guide shaft 38 is inserted into the coil spring 39. The coil spring 39 is sandwiched in the X-axis direction between a slide member 42 (described later) and the front wall portion 32C. This allows the coil spring 39 to apply an elastic force to the slide member 42 on the -X side when compressed in the X-axis direction.

<Slide member>
5 has a base portion 44 constituting a portion below the center in the Z-axis direction, and an upright portion 58 constituting a portion above the center. The slide member 42 is a member that translates the nut member 72 in the translation direction (X-axis direction) by coming into contact with the nut member 72 described below, and the slide member 42 itself is moved in the translation direction of the nut member 72.

(base)
When viewed from the +X side, the base 44 has a bottom wall 45, legs 46, a guided portion 48, an open portion 52, and a recessed portion 56. In other words, the slide member 42 has the bottom wall 45, legs 46, a guided portion 48, an open portion 52, and a recessed portion 56 formed therein.
The bottom wall 45 is formed in a plate shape along the XY plane.
The legs 46 are an example of a restricting portion. When viewed from the X-axis direction, the legs 46 protrude from both ends of the bottom wall 45 in the Y-axis direction toward the bottom plate portion 32B on the opposite side (-Z side) of the guide shaft 38 from the side (+Z side) of the holding portion 63 and the holding portion 64 described later. The legs 46 are configured to restrict the rotation of the slide member 42 around the guide shaft 38 by contacting the bottom plate portion 32B described above.

The guided portion 48 is a portion that bulges out toward the +Z side on the -Y side of the center of the bottom wall 45 in the Y axis direction. A through hole 48A that has a circular cross section and penetrates in the X axis direction is formed in the guided portion 48. The guide shaft 38 is inserted into the through hole 48A. This allows the guided portion 48 to be guided in the X axis direction along the guide shaft 38.
Open portion 52 is formed as a space that is open toward the +Y side on bottom wall 45. In other words, the Y-Z cross section of open portion 52 has a U-shape with the +Y side end being the open end. At the position that is the -Y side end of open portion 52, a back wall 53 is formed along the Z-axis direction.

The recessed portion 56 is a portion recessed from the center of the back wall 53 in the Z-axis direction toward the -Y side, and is open 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 an intersecting direction that intersects with the rotation direction of the lead screw 34. Specifically, when viewed from the X-axis direction, the recessed portion 56 is a space surrounded by a lower surface 56A along the X-Y plane, a side surface 56B that stands upright on the +Z side at the -Y end of the lower surface 56A, and an upper surface 56C that extends from the +Z end of the side surface 56B toward the +Y side. Also, as an example, the recessed portion 56 is formed on the +Z side of the guided portion 48 in the base 44.

As shown in FIG. 6, the open portion 52 has vertical walls 54 and 55 that divide a portion of the space within the open portion 52 into three spaces aligned in the X-axis direction. The vertical wall 54 is disposed on the +X side of the center of the base 44 in the X-axis direction. The vertical wall 55 is disposed on the -X side of the center of the base 44 in the X-axis direction. The vertical walls 54 and 55 have the same size and shape, and are disposed at a distance 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.

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

(Upright part)
The upright portion 58 stands upright on the base 44 along the Z-axis direction. Specifically, the upright portion 58 has a first upright portion 61 and a second upright portion 62 that face each other in the X-axis direction. The first upright portion 61 and the second upright portion 62 are disposed symmetrically with respect to the center of the slide member 42 in the X-axis direction.
A retaining portion 63 protruding toward the -X side is formed on the +Z side end and -X side surface of the first upright portion 61. The tip of the retaining portion 63 is formed in a hemispherical shape. Similarly, a retaining portion 64 protruding toward the +X side is formed on the +Z side end and +X side surface of the second upright portion 62. The tip of the retaining portion 64 is formed in a hemispherical shape.

The size of the gap between the holding parts 63 and 64 in the X-axis direction is large enough to sandwich the previously described held part 26C (Figure 3) in the X-axis direction. The holding parts 63 and 64 hold the second reflection mirror 24 (Figure 3) by sandwiching the held part 26C in the X-axis direction. Note that the position that is the apex of the hemisphere of the holding parts 63 and 64 when viewed from the X-axis direction is referred to as the third center point C (Figure 5).

<Nut material>
As shown in FIG. 7 , the nut member 72 is formed with a nut body portion 74 , an insertion portion 76 , and a protruding portion 86 .

(Nut body)
The nut body 74 is formed in a substantially circular ring shape when viewed from the X-axis direction. A screw hole 74A is formed in the nut body 74, penetrating in the X-axis direction. A female thread (not shown) is formed in the screw hole 74A. This female thread is screwed into a male thread of the lead screw 34 ( FIG. 5 ). This converts the rotational force of the lead screw 34 into a translational force that translates the nut member 72 in the X-axis direction.

A flat surface portion 74B is formed along the XY plane at the +Z end and -Z end of the outer periphery of the nut body portion 74. The end face on the -X side of the nut body portion 74 is referred to as side surface 74C, and the end face on the +X side is referred to as side surface 74D.

(Insertion part)
As shown in Fig. 8, the insertion portion 76 extends outward (to the -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 has a first insertion portion 77 and a second insertion portion 82 disposed on the +Z side of the first insertion portion 77. The first insertion portion 77 and the second insertion portion 82 have approximately the same size and shape. The first insertion portion 77 and the second insertion portion 82 face each other in the Z-axis direction, which is an example of the rotation direction of the lead screw 34, and are capable of approaching and separating from each other in the Z-axis direction.

The first insertion portion 77 and the second insertion portion 82 are arranged so that, when inserted into the recess portion 56 (FIG. 5) in the Y-axis direction, they exert an elastic force (return force of elastic deformation) on the recess portion 56. In other words, the first insertion portion 77 and the second insertion portion 82 are press-fitted into the recess portion 56 and are slidable in the Y-axis direction relative to the slide member 42.

The first insertion portion 77 extends from the outer circumferential surface of the nut body portion 74 toward the -Y side along the Y-axis direction (the radial direction of the lead screw 34). The first insertion portion 77 also has 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 with the thickness direction being in the Z-axis direction. The first arm portion 78 is an example of an elastic portion, and is formed in a cantilever shape with respect to the nut body portion 74, so that the free end side (-Y side) is elastically deformable in the Z-axis direction. The first arm portion 78 is a portion that elastically deforms in response to contact between the insertion portion 76 and the recessed portion 56 (FIG. 5) in the rotation direction of the lead screw 34. Note that elasticity refers to the property of an object that has been deformed by an external force returning to its original state when the external force is removed.

The first contact portion 79 is an example of a curved portion, and protrudes toward the -Z side from the -Z side underside 78A at the -Y side end of the first arm portion 78. The first contact portion 79 is formed in a hemispherical shape. When the insertion portion 76 is inserted into the recess portion 56, the top of the first contact portion 79 comes into contact with the underside 56A (Figure 5).

The first protrusion 81 is an example of a protrusion, and protrudes from the +Z side opposing surface 78B at the -Y side end of the first arm portion 78 toward the +Z side. The first protrusion 81 is formed across the entire width direction (X-axis direction) of the first arm portion 78. The protrusion amount of the first protrusion 81 is approximately the same as the protrusion amount of the first contact portion 79.

The second insertion portion 82 extends from the outer circumferential surface of the nut body 74 toward the -Y side along the Y-axis direction (the radial direction of the lead screw 34). The second insertion portion 82 also has a second arm portion 83, a second contact portion 84, and a second protruding portion 85.
The second arm portion 83 is formed in a plate shape with its thickness direction in the Z-axis direction. The second arm portion 83 is an example of an elastic portion, and is formed in a cantilever shape with respect to the nut body portion 74, so that the free end side (-Y side) is elastically deformable in the Z-axis direction. The second arm portion 83 is a portion that elastically deforms in response to contact between the insertion portion 76 and the recessed portion 56 (FIG. 5) in the rotational direction of the lead screw 34.

The second contact portion 84 is an example of a curved portion, and protrudes toward the +Z side from the upper surface 83A on the +Z side at the -Y side end of the second arm portion 83. The second contact portion 84 is also formed in a hemispherical shape. The top of the second contact portion 84 comes into contact with the upper surface 56C (Figure 5) when the insertion portion 76 is inserted into the recess portion 56.

The second protrusion 85 is an example of a protrusion, and protrudes toward the -Z side from the -Z side opposing surface 83B at the -Y side end of the second arm portion 83. The second protrusion 85 is formed across the entire width direction (X-axis direction) of the second arm portion 83. The amount of protrusion of the second protrusion 85 is approximately the same as the amount of protrusion of the second contact portion 84.

The second insertion portion 82 is disposed on the opposite side to the guide shaft 38 ( FIG. 5 ) with respect to a virtual line K that intersects with the axial center line of the lead screw 34, passes through the second center point B, and runs along the Y-axis direction. The first insertion portion 77 is disposed on the virtual line K, as an example.
Here, the insertion portion 76 shown in FIG. 5 is inserted into the recessed portion 56 and comes into contact with the recessed portion 56, thereby preventing the nut member 72 from rotating freely relative to the slide member 42 when the lead screw 34 is rotated.
The nut member 72 receives a rotational force from the lead screw 34 as the lead screw 34 rotates, and its rotation is restricted by contact with the recessed portion 56, so that the nut member 72 translates in the X-axis direction.

(Protruding part)
8, when viewed from the X-axis direction, a protruding portion 86 is formed on a portion of the outer periphery of the nut body 74 on the opposite side (+Y side) to the insertion portion 76 side (-Y side) relative to the lead screw 34. The protruding portion 86 protrudes toward the side away from the lead screw 34. The protruding portion 86 is formed in a plate shape with its thickness direction in the Z-axis direction.

In this embodiment, the protrusion 86 is disposed on the imaginary line K. In other words, the protrusion 86 extends in the radial direction of the lead screw 34 and is aligned with the first insertion portion 77 in the Y-axis direction. The thickness of the protrusion 86 is set to a thickness that prevents the protrusion 86 from being elastically deformed when the operator pinches the protrusion 86.

<Description of Operation and Effects of First Embodiment>
9, the first insertion portion 77 and the second insertion portion 82 are inserted (press-fitted) into the recess portion 56 in the Y-axis direction, thereby applying an elastic force F 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. In addition, the first insertion portion 77 and the second insertion portion 82 are slidable in the X-axis direction and the Y-axis direction relative to the lower surface 56A and the upper surface 56C.

In the drive unit 30 shown in FIG. 5, when the lead screw 34 is rotated, 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 around the lead screw 34 is restricted by contact with the slide member 42.

The lead screw 34 and the guide shaft 38 are arranged in a state where they are deviated from a parallel state due to dimensional errors and assembly errors, so 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 fluctuates.
Here, the insertion portion 76 of the nut member 72 elastically deforms while maintaining the press-fit state in the recessed portion 56, so that the nut member 72 slides in the Y-axis direction relative to the slide member 42. This absorbs any positional deviation of the nut member 72 caused by errors in the lead screw 34 and the guide shaft 38, allowing the nut member 72 and the slide member 42 to move in the X-axis direction. In other words, it is possible to prevent the torque of the motor 36 (FIG. 4) from increasing.

(1) In this way, according to the drive unit 30, when the nut member 72 comes into contact with the slide member 42 in the rotational 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. As a result, when the slide member 42 moves in conjunction with the translation of the nut member 72, even if the relative position between the nut member 72 and the slide member 42 changes, the nut member 72 is prevented from repeatedly coming into contact with and separating from the slide member 42, so that the oscillation of the slide member 42 and the contact noise between the slide member 42 and the nut member 72 can be suppressed.

Furthermore, with the drive unit 30, when inserting the insertion portion 76 into the recess 56, even if the position of the insertion portion 76 is slightly misaligned with respect to the recess 56, the first insertion portion 77 and the second insertion portion 82 (Figure 8) elastically deform, so that the insertion portion 76 is inserted following the recess 56. As a result, compared to a configuration in which a non-elastically deforming member is press-fitted into the recess 56, high positional accuracy is not required for the positioning of the insertion portion 76 relative to the recess 56 during assembly, making it easier to manufacture the drive unit 30.

(2) Furthermore, according to embodiment 1, the first insertion portion 77 and the second insertion portion 82 are formed in the nut member 72 that receives the rotational force directly from the lead screw 34, making it easier to grasp the amount of deformation during elastic deformation, and therefore making it easier to form the elastic portions of the first insertion portion 77 and the second insertion portion 82.

(3) Furthermore, according to embodiment 1, the nut member 72 and the slide member 42 can come into contact with each other within the range in which the insertion portion 76 is inserted into the recessed portion 56, so the contact area between the nut member 72 and the slide member 42 can be increased compared to a configuration that does not have the recessed portion 56.

(4) Furthermore, according to the first embodiment, the first contact portion 79 and the second contact portion 84 are hemispherical curved portions, and therefore, what comes into contact with the contacted surface (lower surface 56A and upper surface 56C) on the slide member 42 side is a hemispherical surface, which is an example of a curved surface. As a result, even if the angle of the first contact portion 79 and the second contact portion 84 relative to the contacted surface on the slide member 42 side changes, the contact state between the contacted surface and the hemispherical surface is maintained, so that the variation in the contact area between the slide member 42 and the first contact portion 79 and the second contact portion 84 can be suppressed.

(5) Furthermore, according to embodiment 1, there is a space between the first insertion portion 77 and the second insertion portion 82, and no elastic portion exists. This ensures a sufficient deformation stroke for the insertion portion 76 compared to a configuration using one large insertion portion.

(6) In addition, according to the first embodiment, the slide member 42 is guided by the guide shaft 38, so that the movement of the slide member 42 in the translation direction is stabilized, and the positional fluctuation of the slide member 42 in a plane intersecting the translation direction can be suppressed. Furthermore, 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 it becomes possible to position the guide shaft 38 closer to the nut member 72. As a result, when the slide member 42 rotates around the guide shaft 38 as a fulcrum, the position where the nut member 72 and the slide member 42 come into contact is positioned closer to the guide shaft 38, so that the rotation is suppressed, and therefore the application of a rotational force to the slide member 42 can be suppressed.

(7) Furthermore, according to the first embodiment, 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 each other (for example, when an operator pinches the first insertion portion 77 and the second insertion portion 82 in the Z-axis direction), the first protrusion 81 and the second protrusion 85 come into contact. This prevents the first insertion portion 77 and the second insertion portion 82 from approaching each other excessively, thereby making it possible to suppress excessive deformation of at least one of the first insertion portion 77 and the second insertion portion 82.

(8) Furthermore, according to the first embodiment, when the insertion portion 76 is inserted into the recessed portion 56 during the assembly work of the drive unit 30, the nut member 72 is held by the worker pinching the protruding portion 86. This makes it easier to insert the insertion portion 76 into the recessed portion 56 compared to a configuration without the protruding portion 86.

(9) Furthermore, according to the head-up display device 20 of embodiment 1, it is possible to obtain the same effect as the drive unit 30 described above.

[Embodiment 2]
Next, as an example of a head-up display device and a drive unit according to the present invention, a head-up display device 20 and a drive unit 30 according to a second embodiment will be described. Note that parts common to the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.

In the drive unit 30 of the second embodiment shown in FIG. 11, when viewed from the X-axis direction, the distance from the first center point A to the second center point B is the first distance r1 [mm]. The distance from the first center point A to the third center point C is the second distance r2 [mm]. The resultant force of the forces generated by friction at the contact points between the nut member 72 and the slide member 42, which acts on the second center point B, is the first rotational force F1 [N]. The force generated by friction at the contact points between the holding portion 63 and the holding portion 64 and the held portion 26C (FIG. 3), which acts on the third center point C, is the second rotational force F2 [N]. Note that hatching of the cross section is omitted in FIG. 11.
Here, the first distance r1, the second distance r2, the first rotational force F1, and the second rotational force F2 satisfy the relational expression F1×r1<F2×r2.

When viewed from the X-axis direction, the third center point C is located on an imaginary line G that passes through the second center point B and runs along the vertical direction (Z-axis direction). In other words, the second center point B and the third center point C are located on the imaginary line G. Also, the second center point B is located lower (to the -Z side) than the third center point C in the Z-axis direction.

<Description of Operation and Effects of Second Embodiment>
12, a case will be described as an example in which the nut member 72 moves toward the -X side with the rotation of the lead screw 34 (clockwise rotation when viewed from the +X side). In this case, the side surface 74C of the nut member 72 comes into contact with the side surface 55A of the slide member 42 and presses the side surface 55A toward the -X side. This causes the slide member 42 to move toward the -X side. The surface that includes the position where the side surface 74C and the side surface 55A come into contact is referred to as the imaginary surface S. The imaginary surface S is along the YZ plane.

In FIG. 13, the contact surface SA between the nut member 72 and the slide member 42 is shown as a shaded area as part of the imaginary surface S (FIG. 12). At the contact surface SA, a frictional force acts between the nut member 72 and the slide member 42 as the nut member 72 rotates due to the application of a rotational force from the lead screw 34 and as the nut member 72 moves (slides) in the Y-axis direction relative to the slide member 42. Note that hatching of the cross section is omitted in FIG. 13.

(1) According to the head-up display device 20 and the drive unit 30 of the second embodiment, the nut member 72 comes into contact with the slide member 42, causing the slide member 42 to move in the X-axis direction. The slide member 42 is then guided in the X-axis direction by the guide shaft 38. As a result, the second reflection mirror 24 (FIG. 2) is moved (tilted) in the X-axis direction.

Here, the first rotational force F1 and first distance r1 generated by friction at the contact points between the nut member 72 and the slide member 42 shown in Figure 11, and the second rotational force F2 and second distance r2 generated by friction at the contact points between the retaining portion 63 and the retaining portion 64 and the retained portion 26C (Figure 12) satisfy the relational equation F1 x r1 < F2 x r2.
In other words, the rotation (pivot) of the slide member 42 caused by the force received from the nut member 72 is suppressed by the second rotational force F2 at the contact portion between the holding portion 63 and the held portion 26C and the holding portion 64. This makes it possible to suppress the rotation (pivot) of the slide member 42 about the first center point A.

(2) Furthermore, according to the second embodiment, since the second center point B and the third center point C are located on the virtual line G, the space required to arrange the slide member 42 and the nut member 72 in the horizontal direction is smaller than in a configuration in which the second center point B and the third center point C are arranged offset in the horizontal direction. This allows the head-up display device 20 to be made smaller.

(3) Furthermore, according to the second embodiment, the lead screw 34 is disposed at the bottom of the slide member 42. As a result, when the lead screw 34 is driven using a drive unit such as the motor 36, the drive unit, which has a large mass, is disposed at the bottom in 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) Furthermore, according to the second embodiment, the holding portion 63 and the holding portion 64 sandwich the held portion 26C in the X-axis direction, so that when the slide member 42 moves in the X-axis direction, the holding portion 63 or the holding portion 64 is present in the movement direction (+X side, -X side) of the held portion 26C. This makes it possible to prevent the position of the held portion 26C from shifting relative to the positions of the holding portion 63 and the holding portion 64 as the slide member 42 moves.

(5) Furthermore, according to the second embodiment, when the amount of rotation of the slide member 42 around the guide shaft 38 becomes large, the legs 46 come into contact with the bottom plate portion 32B of the main body frame 32, thereby stopping the rotation of the slide member 42. This makes it possible to suppress excessive rotation of the slide member 42.

[Embodiment 3]
Next, a head-up display device 20 and a drive unit 90 according to a third embodiment will be described as an example of a head-up display device and a drive device according to the present invention. Note that parts common to the first and second embodiments are given the same reference numerals and descriptions thereof will be omitted.

The drive unit 90 of the third embodiment shown in FIG. 14 has 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) in the drive unit 30 of the second embodiment, but the other configurations are the same.

The slide member 92 does not have the recessed portion 56 (FIG. 13) of the slide member 42, and instead has a continuous back 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), and the outer circumferential surface aligned in the Y-axis direction is a continuous curved surface.

In the drive unit 90, the first distance r1, the second distance r2, the first rotational force F1, and the second rotational force F2 satisfy the relational expression F1×r1<F2×r2. In addition, 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 3>
14, when the lead screw 34 is rotated in the clockwise direction, the nut member 94 attempts to rotate in the clockwise direction along with the lead screw 34. A part of the outer periphery of the nut member 94 comes into contact with a part of the wall surface of the open portion 52. In addition, the side surface on the -X side of the nut member 94 presses the side surface 55A toward the -X side. This causes the slide member 92 to move to the -X side.

Here, a first rotational force F1 due to friction in the counterclockwise direction shown acts on the contact area between the nut member 94 and the slide member 92, but is suppressed by a second rotational force F2 at the contact area between the holding portion 63 and the holding portion 64 and the held portion 26C (FIG. 3). This makes it possible to suppress the rotation (pivot) of the slide member 92 around the first center point A. Note that a description of the same effects as those of the second embodiment will be omitted.

[Embodiment 4]
Next, a head-up display device 20 and a drive unit 140 according to a fourth embodiment will be described as an example of a head-up display device and a drive device according to the present invention. Note that parts common to the first, second, and third embodiments are given the same reference numerals and descriptions thereof will be omitted. Also, descriptions of the same actions and effects as those of the first, second, and third embodiments may be omitted.

As shown in FIG. 20, a drive unit 140 of the fourth embodiment is provided in place of the drive unit 30 in the head-up display device 20 (FIG. 2) of the first embodiment.
The drive unit 140 has, as its main parts, the lead screw 34, nut members 172 and 173, a slide member 141, a first arm portion 176 and a second arm portion 184 (FIG. 23). Furthermore, the drive unit 140 has, as an example, a main body frame 32, a motor 36 (FIG. 4), and a guide shaft 38.
In addition, the drive unit 140 changes the reflection angle of the display light L at the second reflection mirror 24 by moving the slide member 141 in the X-axis direction while the slide member 141 holds the second reflection mirror 24 (FIG. 3).

<Slide member>
The slide member 141 is an example of a movable member, and has a base 142 that constitutes the main body of the slide member 141, an upright portion 162 that stands upright on the +Z side from the base 142, and a leaf spring 166 that is attached to the base 142 and faces the upright portion 162 in the X-axis direction. In addition, the slide member 141 is a member that translates the nut members 172 and 173 in the translation direction (X-axis direction) by contacting with the nut members 172 and 173 described below, and the slide member 141 itself is moved in the translation direction of the nut members 172 and 173.

(base)
22, the base 142 includes a guided portion 143, a bottom wall 147, legs 148, and a vertical wall 156. The base 142 also includes an open portion 144.
The guided portion 143 is a portion formed in a block shape. A through hole 153 ( FIG. 21 ) with a circular cross section that penetrates in the X-axis direction is formed in the guided portion 143. The through hole 153 is located at approximately the center of the guided portion 143 in the Y-axis direction. The guide shaft 38 ( FIG. 20 ) is inserted through the through hole 153. As a result, 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 XY plane, and is located on the −Z side of the guided portion 143 .
The legs 148 are an example of a restricting portion. The legs 148 protrude from both ends of the bottom wall 147 in the Y-axis direction toward the bottom plate portion 32B (FIG. 4). The legs 148 are configured to restrict the rotation of the slide member 141 around the guide shaft 38 by coming into contact with the bottom plate portion 32B.

Open portion 144 is an example of a storage portion, and stores nut members 172 and 173 described below. Specifically, open portion 144 is located between bottom wall 147 and guided portion 143, and is formed as a space that is open toward the +Y side. In other words, the shape of the YZ cross section of open portion 144 is a trapezoid whose +Y side end is opening 144C.
The opening 144C is open in the Y direction (+Y side) and is located at a position corresponding to the lower base of the trapezoid. The opening 144 is partitioned into a first opening 144A and a second opening 144B by a partition wall 154 described later.

The first open portion 144A is located on the +X side of the partition wall 154. The second open portion 144B is located on the -X side of the partition wall 154. As an example, the width of the first open portion 144A in the X-axis direction is wider than the width of the second open portion 144B in the X-axis direction.
The vertical wall 156 stands upright on the +Z side at a portion on the -Y side of the center in the Y axis direction of the bottom wall 147. The end portion on the +Z side of the vertical wall 156 is connected to the guided portion 143. In other words, the vertical wall 156 constitutes the inner wall on the -Y side of the open portion 144.

The -Z end of the guided portion 143 is formed with an upper surface 145A and an upper inclined surface 145B. Note that, as an example, the upper surface 145A and the upper inclined surface 145B are formed on both the first opening portion 144A and the second opening portion 144B. As an example, the upper surface 145A is a flat surface along the XY 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 is inclined so that the end of the upper inclined surface 145B on the +Y side is located on the +Z side relative to the end of the upper inclined surface 145B on the -Y side. In other words, the upper inclined surface 145B is inclined in a direction intersecting with the Y axis direction when viewed from the X axis direction. The inclination angle of the upper inclined surface 145B with respect to the X-Y plane is set to an angle at which the second contact portion 188 described later and the upper inclined surface 145B can come into contact with each other, and at an angle at which the nut members 172, 173 (FIG. 20) can be easily inserted toward the -Y side. In this way, the upper inclined surface 145B is inclined so that the space of the open portion 144 becomes wider as it approaches the opening 144C in the Y axis direction.
As one example, the position of the boundary between upper surface 145A and upper inclined surface 145B is on the +Y side of the position of lead screw 34 (FIG. 20).

A lower surface 146A and a downwardly inclined surface 146B are formed on the end of the bottom wall 147 on the +Z side. Note that, as an example, the lower surface 146A and the downwardly inclined surface 146B are formed on both the first opening portion 144A and the second opening portion 144B. As an example, the lower surface 146A is a flat surface 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 is inclined so that the end of the lower inclined surface 146B on the +Y side is located closer to the -Z side than the end of the lower inclined surface 146B on the -Y side. 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 of inclination of the lower inclined surface 146B with respect to the X-Y plane is set to an angle at which the first contact portion 182 described later and the lower inclined surface 146B can contact each other, and at an angle at which the nut members 172, 173 (FIG. 20) can be easily inserted toward the -Y side. In this way, the lower inclined surface 146B is inclined so that the space of the open portion 144 becomes wider as it approaches the opening 144C in the Y axis direction.
As one example, the position of the boundary between lower surface 146A and lower inclined surface 146B is on the +Y side of the position of lead screw 34 (FIG. 20).

The partition wall 154 is formed in a plate shape having a predetermined thickness in the X-axis direction. The partition wall 154 also divides the open portion 144 into a first open portion 144A and a second open portion 144B in the X-axis direction. The partition wall 154 is formed with a notch 155 cut toward the -Y side.
The cutout 155 is formed in a U-shape that opens to the +Y side. In other words, the partition wall 154 is U-shaped when viewed from the X-axis direction. The first opening 144A and the second opening 144B are connected via the cutout 155. A side wall 151 is formed on the -X side of the second opening 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 the second open portion 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 cutout 152 is formed in a U-shape that opens to the +Y side. In other words, the side wall 151 is U-shaped when viewed from the X-axis direction.
The lead screw 34 ( FIG. 20 ) is inserted through the inside of the notch 152 and the inside of the notch 155 .

An attachment wall 157 standing upright on the +Z side is formed at a portion on the +X side of the center in the X-axis direction of the guided portion 143 .
For example, the mounting wall 157 is configured with a plate-like portion having a predetermined thickness in the X-axis direction and a plate-like portion having a predetermined thickness in the Y-axis direction. In addition, the mounting wall 157 is formed with a limiting portion 158 that limits the movement of a leaf spring 166 (FIG. 20) described later.

(Upright part)
20, the upright portion 162 stands upright on the +Z side from a portion on the -X side of the center in the X-axis direction of the guided portion 143. 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 that protrudes from the upright portion 162 to the +X side.

(Leaf spring)
As an example, the leaf 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 between the mounting wall 157 (FIG. 22) and the limiting portion 158. The curved portion 166B is formed in a U-shape when viewed from the Y-axis direction at the end of the clamped portion 166A on the +Z side. 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 the hemispherical portion 163 in the X-axis direction. The displacement portion 166C biases the held portion 26C toward the hemispherical portion 163. In other words, the upright portion 162 and the leaf spring 166 sandwich the held portion 26C in the X-axis direction.

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 of the vertical wall 156. The through hole 149 is a hollow portion formed when the base 142 is formed by injection molding. The through hole 149 is formed in a quadrangle shape when viewed from the X-axis direction.
When viewed from the +X side, 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, for example.

<Nut material>
20, the nut member 172 is housed in the first open 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 open portion 144B, and is translated in the X-axis direction as the lead screw 34 rotates. The nut members 172 and 173 are each an example of a driven member, and are made of resin.

A coil spring 177 is provided between the nut members 172 and 173. The coil spring 177 is capable of expanding and contracting in the X-axis direction. In this manner, the nut members 172 and 173 are disposed in a tensioned state with respect to the lead screw 34 by receiving an elastic force from the coil spring 177, so that fluctuations in position within the YZ plane with respect to the lead screw 34 are suppressed.
In addition, the nut members 172 and 173 are formed, for example, to have a symmetrical shape with respect to a virtual plane (not shown) along the YZ plane. For this reason, the nut member 172 will be described in detail, and a description of the nut member 173 will be omitted.

As shown in FIG. 23 , the nut member 172 has, as an example, a nut body portion 174 , an arm portion 175 , a cylindrical portion 192 , a recessed portion 194 , and a protruding portion 196 .
The arm portion 175 is an example of an arm portion, and has a first arm portion 176 and a second arm portion 184 that face each other in the rotational direction of the nut member 172 and are capable of moving toward and away from each other.
The first arm portion 176 is formed with a first protrusion portion 178 and a first contact portion 182 .
The second arm portion 184 is formed with a second protruding portion 186 and a second contact portion 188 .

(Nut body)
The nut body 174 is an example of a translation part, and is translated by receiving a rotational force from the lead screw 34. Specifically, the nut body 174 is formed in a block shape in which the dimensions in the Y-axis direction and the Z-axis direction are larger than the dimension in the X-axis direction. The nut body 174 is formed with a screw hole 179 penetrating in the X-axis direction. The screw hole 179 is formed with a female screw portion 179A. The female screw portion 179A is screwed into a male screw portion (not shown) of the lead screw 34 (FIG. 20). This allows the rotational force of the lead screw 34 to be converted into a translational force that translates the nut member 172 in the X-axis direction.
A surface on the +Y side of the nut body 174 and located between a first arm portion 176 and a second arm portion 184 described below is referred to as a side surface 174A.

(First arm portion)
The first arm portion 176 is an example of an elastic portion, and extends in the Y-axis direction from a portion on the -Z side of the center in the Z-axis direction at the +Y side end of the nut body portion 174 to the +Y side. The first arm portion 176 is formed in a plate shape whose thickness direction is in the Z-axis direction. The first arm portion 176 further has a thick portion 176A and a thin portion 176B.
The thick portion 176A is a portion on the nut body 174 side (-Y side) with respect to the center in the Y axis direction of the first arm portion 176. 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 on the +Y side with respect to the center in the Y axis direction of the first arm portion 176. The thin portion 176B is also a portion that is thinner in the Z axis direction than the thick portion 176A.
A lower surface 176C on the -Z side of first arm portion 176 is slightly inclined with respect to the Y-axis direction so that the +Y side end of lower surface 176C is positioned on the +Z side relative to the -Y side end.
In addition, a surface of the first arm portion 176 that faces the second arm portion 184 in the Z direction is referred to as a facing surface 176D.

(First protrusion)
The first protrusion 178 is an example of a protrusion, and protrudes from the opposing surface 176D at the +Y side end of the first arm portion 176 to the +Z side. In other words, the first protrusion 178 is formed on the opposing surface 176D. The first protrusion 178 is also formed across the entire width direction (X-axis direction) of the first arm portion 176. Furthermore, 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 of the center of the screw hole 179 in the Z-axis direction.

(First contact portion)
The first contact portion 182 is an example of a contact portion and curved portion of the first arm portion 176 with 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 semi-spherical shape and has a curved surface 182A. The top of the first contact portion 182 comes into contact with the lower inclined surface 146B (FIG. 22) when the nut member 172 is stored in the first opening portion 144A.

(Second arm portion)
The second arm portion 184 is an example of an elastic portion, and extends in the Y-axis direction from a portion on the +Z side of the center in the Z-axis direction at the +Y side end of the nut body portion 174 toward the +Y side. The second arm portion 184 is formed in a plate shape whose thickness direction is in the Z-axis direction. The second arm portion 184 further has a thick portion 184A and a thin portion 184B.
The thick portion 184A is a portion on the nut body 174 side (-Y side) with respect to the center in the Y axis direction of the second arm portion 184. 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 on the +Y side with respect to the center in the Y axis direction of the second arm portion 184. The thin portion 184B is also a portion that is thinner in the Z axis direction than the thick portion 184A.
An upper surface 184C on the +Z side of second arm portion 184 is slightly inclined with respect to the Y axis direction so that the +Y side end of upper surface 184C is positioned closer to the -Z side than the -Y side end.
In addition, a surface of the second arm portion 184 that faces the first arm portion 176 in the Z direction is referred to as a facing surface 184D.
In this embodiment, as an example, the length in the Y-axis direction of the first arm portion 176 and the length in the Y-axis direction of the second arm portion 184 are each approximately three times the diameter of the screw hole 179.

(Second protrusion)
The second protrusion 186 is an example of a protrusion, and protrudes from the opposing surface 184D at the +Y side end of the second arm portion 184 to the -Z side. In other words, the second protrusion 186 is formed on the opposing surface 184D. The second protrusion 186 is also formed across the entire width direction (X-axis direction) of the second arm portion 184. Furthermore, the second protrusion 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 protrusion 186. The end surface 186A is located on the +Z side of the center of the screw hole 179 in the Z-axis direction.
The first protrusion 178 and the second protrusion 186 are capable of moving toward and away from each other in the Z-axis direction.

(Second contact portion)
The second contact portion 188 is an example of a contact portion and curved portion with the slide member 141 of the second arm portion 184, 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 semi-spherical shape and has a curved surface 188A. The top of the second contact portion 188 comes into contact with the upper inclined surface 145B (FIG. 22) when the nut member 172 is stored in the first opening portion 144A.

(Cylindrical part)
The tube portion 192 extends from the nut body 174 to the -X side. The tube portion 192 is formed in a cylindrical shape. A female screw portion 179A is formed on the inside of the tube portion 192. The width of the tube portion 192 in the X-axis direction is wider than the width of the nut body 174 in the X-axis direction.

(recess)
24, the recess 194 is a portion recessed toward the +Y side from the end face on the -Y side of the nut body 174. In other words, the recess 194 is formed on the side opposite to the side on which the arm portion 175 is formed in the nut body 174. In the recess 194, a gate (not shown) formed during the resin molding of the nut member 172 is removed.
A surface constituting the bottom of recess 194 on the +Y side is referred to as side surface 194A. A convex portion 195A that protrudes further toward the -Y side than side surface 194A is formed on the -Z side of side surface 194A. A convex portion 195B that protrudes further toward the -Y side than side surface 194A is formed on the +Z side of side surface 194A.

The amount of protrusion of convex portion 195A in the Y-axis direction and the amount of protrusion of convex portion 195B in the Y-axis direction are approximately the same. Furthermore, convex portion 195A and convex portion 195B face vertical wall 156 at a distance in the Y-axis direction. As an example, side surface 194A is formed with remnant portion 197 that remains when a gate (not shown) formed during molding is cut off. Remnant portion 197 is located inside recess 194.

(Protruding part)
The overhanging portion 196 is formed on the opposite side (+Y side) of the recessed portion 194 side (-Y side) of the nut body 174 when viewed from the X-axis direction. Specifically, the overhanging portion 196 overhangs from the center of the side surface 174A in the Z-axis direction to the +Y side. The end surface 196A (FIG. 23) on the -X side of the overhanging portion 196 is a flat surface along the YZ plane. The end surface 196A is in contact with the end portion on the +X side of the coil spring 177 (FIG. 20). In this way, the overhanging portion 196 is formed, thereby ensuring the contact area between the nut body 174 and the coil spring 177.

As an example, the second arm portion 184, the second protrusion portion 186, and the second contact portion 188 are configured to be symmetrical with the first arm portion 176, the first protrusion portion 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 runs along the Y-axis direction, when viewed from the X-axis direction.
The nut member 172 receives a rotational force from the lead screw 34 as the lead screw 34 rotates, and its rotation is restricted by contact with the upper inclined surface 145B and the lower inclined surface 146B, so that the nut member 172 moves in the X-axis direction.

<Description of operation and effects of the fourth embodiment>
20 is assembled, the slide member 141 is brought closer to the nut members 172 and 173, through which the lead screw 34 is inserted, from the -Y side. Then, the nut member 172 is stored in the first opening 144A, and the nut member 173 is stored in the second opening 144B. Note that since the nut member 173 has the same effect as the nut member 172, a description of the nut member 173 will be omitted hereafter.

When the nut member 172 is housed in the first open portion 144A, the first contact portion 182 of the nut member 172 contacts the lower inclined surface 146B, and the second contact portion 188 contacts the upper inclined surface 145B.
Here, when a reaction force is applied from the slide member 141 to the first contact portion 182 and the second contact portion 188, the first arm portion 176 and the second arm portion 184 are elastically deformed in a direction approaching each other in the Z-axis direction, which makes it easier to perform the operation of storing the nut member 172 in the first opening portion 144A. Furthermore, as the elastically deformed first arm portion 176 and the second arm portion 184 attempt to return to their original states, a return force acts on the first contact portion 182 and the second contact portion 188, so that 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, 173 come into contact with the slide member 141 in the rotational direction of the lead screw 34, the first arm portion 176 and the second arm portion 184 are elastically deformed, so that the nut members 172, 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, 173. As a result, when the slide member 42 moves in conjunction with the translation of the nut members 172, 173, even if the relative positions of the nut members 172, 173 and the slide member 141 change, the nut members 172, 173 are prevented from repeatedly coming into contact with and separating from the slide member 141, so that the oscillation of the slide member 141 and the contact noise between the slide member 141 and the nut members 172, 173 can be suppressed.

According to the drive unit 140, the first arm portion 176 and the second arm portion 184 extend in the Y-axis direction, so that the first arm portion 176 and the second arm portion 184 are each in a cantilever state, thereby ensuring the amount of elastic deformation of the first arm portion 176 and the second arm portion 184.
Furthermore, according to the drive unit 140, the first contact portion 182 and the second contact portion 188 of the first arm portion 176 and the second arm portion 184 with the slide member 141 are curved portions, so that the curved surfaces 182A and 188A come into contact with the upper inclined surface 145B and the lower inclined surface 146B on the slide member 141 side. As a result, even if the angle 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 slide member 141 side changes, the contact state between the upper inclined surface 145B and the lower inclined surface 146B and the curved surfaces 182A and 188A is maintained, so that the variation in the contact area between the slide member 141 and the first arm portion 176 and the second arm portion 184 can be suppressed.

According to drive unit 140, the space of open portion 144 becomes wider as it approaches opening 144C, so that nut members 172, 173 can be easily inserted into the inside of open portion 144 through opening 144C.
Furthermore, according to the drive unit 140, since there is a space between the first arm portion 176 and the second arm portion 184, and there is no elastic portion between the first arm portion 176 and the second arm portion 184, it is possible to ensure the deformation stroke of the arm portion compared to a configuration that uses one large arm portion.

According to the drive 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 each other, the first protrusion 178 and the second protrusion 186 come into contact with each other. This prevents the first arm portion 176 and the second arm portion 184 from approaching each other excessively, thereby making it possible to suppress excessive deformation of at least one of the first arm portion 176 and the second arm portion 184.
Furthermore, according to the drive unit 140, when a gate (not shown) is removed from within the recess 194, a remnant 197 that is a part of the gate remains within the recess 194. In other words, the remaining remnant 197 is prevented from protruding outward from the nut body 174, and therefore contact between the remaining remnant 197 and the slide member 141 can be prevented.

[Various Modifications]
The head-up display device 20, drive unit 30, drive unit 90 and drive unit 140 according to each embodiment of the present invention are basically configured as described above, but it is of course possible to modify or omit partial configurations within the scope that does not deviate from the gist of the present invention.

<Modification 1>
15 shows a schematic arrangement of each component of a drive unit 100 as a first modified example of the drive device. The drive unit 100 has, as its 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 102. The slide member 102 is shown as a rectangular member elongated in the Z-axis direction when viewed from the X-axis direction. The arrows in the figure show a state in which a force is applied to the slide member 102 by the insertion portion 76. The dashed lines in the figure indicate a further modified example in which the positions of the insertion portion 76 or 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 of the center point M when the slide member 102 is viewed from the X-axis direction. The second center point B is located on the -Y side and the -Z side of the center point M, and on the -Y side and the -Z side of the first center point A. The third center point C is located on the +Y side and the +Z side of the center point M, and on the +Z side of the first center point A. The insertion portion 76 is located on the +Z side of the first center point A and on the -Z side of the third center point C. The drive unit 100 in which each component is arranged in this manner can also obtain the same effects as those of each embodiment. The insertion portion 76 may be located on the -Z side of the first center point A. The holding portion 63 and the holding portion 64 may be located on the -Y side and the +Z side of the center point M.

<Modification 2>
16 shows a schematic arrangement of each component of a drive unit 110 as a second modified example of the drive device. The drive unit 110 has, as its 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 112. The slide member 112 is shown as a rectangular member that is long in the Z-axis direction when viewed from the X-axis direction. The arrows in the figure indicate a state in which a force is applied to the slide member 112 by the insertion portion 76. The dashed lines in the figure indicate a further modified example in which the position of the insertion portion 76 is changed.

The first center point A is located on the +Y side and the -Z side of 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 of the center point M, and on the -Y side and the +Z side of the first center point A. The third center point C is located on the +Z side of the center point M, and on the -Y side and the +Z side of the first center point A. The insertion portion 76 is located on the +Y side and the +Z side of the first center point A. The drive unit 110 in which each component is arranged in this manner can also provide the same effects as those of each embodiment. The insertion portion 76 may be located on the -Y side and the -Z side of the first center point A.

<Modification 3>
17 shows a schematic arrangement of each component of a drive unit 120 as a third modified example of the drive device. The drive unit 120 has, as its 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 shown as a rectangular member that is long in the Z-axis direction when viewed from the X-axis direction. The arrows in the figure indicate a state in which a force is applied to the slide member 122 by the insertion portion 76. The dashed lines in the figure indicate a further modified example in which the position of the insertion portion 76 is changed.

The first center point A is located on the +Y side of 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 of the center point M, and on the -Y and +Z side of the first center point A. The third center point C is located on the -Y and -Z side of the center point M, and on the -Y and -Z side of the first center point A. The insertion portion 76 is located on the -Z side of the first center point A. The drive unit 120 in which each component is arranged in this manner can also achieve the same effects as those of each embodiment. The insertion portion 76 may be located on the -Y and -Z side of the first center point A, and may be arranged so that a force acts in a diagonal direction that intersects with the Z-axis direction.

<Modification 4>
FIG. 18 shows, as Modification 4, an insertion portion 124 which is a modification of the insertion portion 76 (FIG. 9).
The insertion portion 124 is formed in a cylindrical shape with its axis oriented in the Y-axis direction. In the insertion portion 124, the semicircular portion on the +Z side of the imaginary line H that passes through point CA representing the central axis and runs along the X-axis direction is referred to as the upper portion 124A. Also, the semicircular portion on the -Z side of the imaginary line H is referred to as the lower portion 124B. The top of the upper portion 124A is in contact with the upper surface 56C. The bottom of the lower portion 124B is in contact with the lower surface 56A. The insertion portion 124 does not contact the recessed portion 56 in the X-axis direction.

The insertion portion 124 is inserted (press-fitted) into the recess 56, and exerts an elastic force F on the lower surface 56A and the upper surface 56C. Since the insertion portion 124 is cylindrical, a space is formed between the upper surface 124A and the lower surface 124B, ensuring a stroke of elastic deformation of the upper surface 124A and the lower surface 124B. The insertion portion 124 is also slidable in the X-axis direction and the Y-axis direction relative to the lower surface 56A and the upper surface 56C. In this way, the insertion portion may be formed as a single part, and an elastic force F may be exerted on the +Z side and the -Z side of the recess 56.

<Modification 5>
19 shows a part of a drive unit 130 as a fifth modified example of the drive device. In the drive unit 130, the insertion portion 76 (FIG. 5) of the nut member 72 in the drive unit 30 (FIG. 5) is replaced with an insertion portion 132. In addition, an elastic portion 134 is embedded in a portion including the lower surface 56A and the upper surface 56C of the slide member 42 so that a portion of the elastic portion 134 is exposed in the recessed portion 56.

The insertion portion 132 is formed in a cylindrical shape with its axial direction aligned in the Y-axis direction. In other words, the insertion portion 132 is a solid portion that is not easily elastically deformed.
As an example, the elastic portion 134 is configured by a pair (two) of upper and lower elastic members 136. The two elastic members 136 are symmetrically disposed on the −Z side and +Z side with respect to the insertion portion 132.

As an example, the elastic member 136 is formed in a hollow rectangular tube shape when viewed from the Y-axis direction. Also, as an example, the elastic member 136 is formed in a trapezoid shape when viewed from the Y-axis direction, and has a lower base 136A, an upper base 136B, and two oblique sides 136C. The two upper bases 136B and the four oblique sides 136C are fixed to the slide member 42 by adhesive.

The two lower bottoms 136A are spaced apart in the Z-axis direction and are in contact with the outer circumferential surface of the insertion portion 132 in the Z-axis direction. The two lower bottoms 136A are also elastically deformable in the Z-axis direction because the elastic member 136 is hollow. In this way, even in a configuration in which the elastic member 136 is formed in the recessed portion 56 of the slide member 42, the elastic member 136 is elastically deformed to allow the nut member 72 to slide against the slide member 42 while maintaining the contact state between the slide member 42 and the nut member 72, thereby suppressing the oscillation of the slide member 42 and the contact noise between the movable member and the driven member.

<Other Modifications>
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 being hemispherical curved portions, and may be curved portions other than hemispherical, and may be formed to have flat surfaces and corners. The first contact portion 79 and the second contact portion 84 are not limited to being extended from the nut body portion 74 in the Y-axis direction, and may be a bifurcated tip portion of one portion extending outward from the outer periphery of the nut body portion 74. The nut member 72 does not need to have the overhanging portion 86 formed thereon.

With regard to the first insertion portion 77 and the second insertion portion 82, it is not limited to only the second insertion portion 82 that is arranged on the opposite side of the imaginary line K from the guide shaft 38 side, but the first insertion portion 77 and the second insertion portion 82 may be arranged. In a configuration in which the first insertion portion 77 and the second insertion portion 82 are switched, only the first insertion portion 77 may be arranged on the opposite side of the imaginary line K from the guide shaft 38 side. In addition, the first insertion portion 77 and the second insertion portion 82 may not be formed with the first protrusion 81 and the second protrusion 85.
A plurality of the insertion portions 76 may be formed in the X-axis direction.

In the head-up display device 20 of the second embodiment, when viewed from the X-axis direction, the second center point B or the third center point C may be positioned offset in the Y-axis direction from the imaginary line G along the vertical direction. Also, as in the third modification example, the second center point B may be positioned above the third center point C.

The holding portion 63 and the holding portion 64 may be arranged at an interval in the X-axis direction and configured to come into contact with the held portion 26C when the slide member 42 moves in the X-axis direction.
The leg portion 46 is not limited to being in 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. Also, the slide member 42 may not be formed with the leg portion 46.
Each elastic portion may be made of rubber, resin, or metal.

The drive unit 140 may have only one arm portion 175. The contact portion of the arm portion 175 with the slide member 141 may be a flat portion. A flat surface along the XY plane may be formed instead of the lower inclined surface 146B and the upper inclined surface 145B. In the arm portion 175, one of the first protrusion 178 and the second protrusion 186 may not be formed. Also, both the first protrusion 178 and the second protrusion 186 may not be formed. In the nut members 172 and 173, if the portion where the gate is removed is formed in a position that does not face the slide member 141, the recess 194 may not be formed.

10...vehicle, 12...instrument panel, 14...windshield,
20... head-up display device, 21... housing, 21A... transmission portion, 22... light emission portion,
22A: light source; 22B: liquid crystal display element; 23: first reflecting mirror; 24: second reflecting mirror;
25: Mirror body, 26: Mirror holder, 26A: Main body, 26B: Shaft,
26C: held portion; 28: shaft holder; 29: torsion spring;
30: drive unit; 32: main body frame; 32A: vertical plate portion; 32B: bottom plate portion;
32C...front wall part, 32D...rear wall part, 33A...through hole, 33B...through hole,
34: lead screw; 36: motor; 38: guide shaft; 39: coil spring;
42: slide member, 44: base, 45: bottom wall, 46: leg, 48: guided portion,
48A...through hole, 52...opening part, 53...back wall, 54...vertical wall, 54A...side surface, 55...vertical wall,
55A...Side surface, 56...Recessed portion, 56A...Bottom surface, 56B...Side surface, 56C...Top surface,
58... Upright part, 61... First upright part, 62... Second upright part, 63... Holding part, 64... Holding part,
72... nut member, 74... nut body portion, 74A... screw hole, 74B... flat portion,
74C: side surface, 74D: side surface, 76: insertion portion, 77: first insertion portion, 78: first arm portion,
78A...lower surface, 78B...opposed surface, 79...first contact portion, 81...first protrusion portion,
82: second insertion portion; 83: second arm portion; 83A: upper surface; 83B: opposing surface;
84: second contact portion, 85: second protrusion portion, 86: overhang portion, 90: drive unit,
92 ... slide member, 94 ... nut member, 100 ... drive unit,
102...slide member, 110...drive unit, 112...slide member,
120: drive unit; 122: slide member; 124: insertion portion; 124A: upper portion;
124B: lower portion, 130: drive unit, 132: insertion portion, 134: elastic portion,
136: Elastic member; 136A: Lower base portion; 136B: Upper base portion; 136C: Oblique side portion;
140: drive unit; 141: slide member; 142: base; 143: guided portion;
144...opening part, 144A...first opening part, 144B...second opening part, 144C...opening part,
145A...upper surface, 145B...upper inclined surface, 146A...lower surface, 146B...lower inclined surface,
147... bottom wall, 148... leg portion, 149... through hole, 151... side wall, 152... notch portion,
153 ... through hole, 154 ... partition wall, 155 ... notch, 156 ... vertical wall, 157 ... mounting wall,
158: limiting portion; 162: upright portion; 163: hemispherical portion; 166: leaf spring;
166A: clamped portion, 166B: curved portion, 166C: displacement portion, 172: nut member,
173... nut member, 174... nut body portion, 174A... side surface, 175... arm portion,
176...first arm part, 176A...thick wall part, 176B...thin wall part, 176C...bottom surface,
176D: opposing surface; 177: coil spring; 178: first protrusion; 178A: end surface;
179...screw hole, 179A...female thread portion, 182...first contact portion, 182A...curved surface,
184: second arm portion; 184A: thick portion; 184B: thin portion; 184C: upper surface;
184D...Opposing surface, 186...Second protrusion, 186A...End surface, 188...Second contact part,
188A...curved surface, 192...tubular portion, 194...concave portion, 194A...side surface, 195A...convex portion,
195B... Convex portion, 196... Overhanging portion, 196A... End surface, 197... Remaining portion, A... First center point,
B: second center point; C: third center point; CA: center point; F1: first rotational force;
F2: second rotational force, G: virtual line, H: virtual line, K: virtual line, r1: first distance,
r2: second distance, Q: virtual line, V: virtual image

Claims (15)

A rotating shaft that is rotated by a driving unit;
A driven member that receives a rotational force from the rotating shaft;
a movable member that translates the driven member by contact with the driven member and is moved in the translation direction of the driven member;
an elastic portion formed on at least one of the driven member and the movable member, the elastic portion being elastically deformed in response to contact between the driven member and the movable member in the rotation direction of the rotation shaft;
having
The movable member has a recess formed therein,
The driven member is formed with an insertion portion to be inserted into the recess,
The elastic portion is formed in at least one of the recessed portion and the insertion portion,
The elastic portion is formed on the insertion portion,
The insertion portion has a first insertion portion and a second insertion portion that face each other in the rotational direction and are movable toward and away from each other.
A drive device characterized by: 2. The drive device according to claim 1,
The elastic portion is formed on the driven member.
A drive device characterized by: 2. The drive device according to claim 1,
A protruding portion protruding toward a side away from the rotation shaft is formed at a portion of the driven member opposite to the insertion portion side with respect to the rotation shaft.
A drive device characterized by: The drive device according to any one of claims 1 to 3,
a guide member is provided to guide the movable member in the translation direction;
At least one of the first insertion portion and the second insertion portion is disposed on an opposite side to the guide member with respect to a virtual line intersecting an axial line of the rotation shaft.
A drive device characterized by: The drive device according to any one of claims 1 to 4,
A protrusion is formed on at least one of the opposing surfaces of the first insertion portion and the second insertion portion.
A drive device characterized by: A rotating shaft that is rotated by a driving unit;
A driven member that receives a rotational force from the rotating shaft;
a movable member that translates the driven member by contact with the driven member and is moved in the translation direction of the driven member;
an elastic portion formed on at least one of the driven member and the movable member, the elastic portion being elastically deformed in response to contact between the driven member and the movable member in the rotation direction of the rotation shaft;
having
The movable member has a recess formed therein,
The driven member is formed with an insertion portion to be inserted into the recess,
The elastic portion is formed in at least one of the recessed portion and the insertion portion,
A protruding portion protruding toward a side away from the rotation shaft is formed at a portion of the driven member opposite to the insertion portion side with respect to the rotation shaft.
A drive device characterized by: The drive device according to any one of claims 1 to 6,
A contact portion of the insertion portion with the movable member is a curved portion.
A drive device characterized by: A rotating shaft that is rotated by a driving unit;
A driven member that receives a rotational force from the rotating shaft;
a movable member that translates the driven member by contact with the driven member and is moved in the translation direction of the driven member;
an elastic portion formed on at least one of the driven member and the movable member, the elastic portion being elastically deformed in response to contact between the driven member and the movable member in the rotation direction of the rotation shaft;
having
the driven member has a translation portion that is translated by receiving a rotational force from the rotation shaft,
The elastic portion is at least one arm portion extending from the translation portion in a direction intersecting the rotation direction.
A drive device characterized by: 9. The drive device according to claim 8,
The elastic portion is formed on the driven member.
A drive device characterized by: 10. The drive device according to claim 8 or 9,
The contact portion of the arm with the movable member is a curved surface portion.
A drive device characterized by: In the drive device according to any one of claims 8 to 10,
The movable member is formed with a housing portion for housing the driven member,
The storage section has an opening that opens in the intersecting direction,
When viewed from the translation direction, a contact surface of the storage portion with the arm portion is an inclined surface that is inclined in a direction intersecting with the intersecting direction,
The inclined surface is inclined so that the space of the storage section becomes wider as it approaches the opening in the intersecting direction.
A drive device characterized by: In the drive device according to any one of claims 8 to 11,
The arm portion includes a first arm portion and a second arm portion that face each other in the rotational direction and are movable toward and away from each other.
A drive device characterized by: 13. The drive device according to claim 12,
A protrusion is formed on at least one of the opposing surfaces of the first arm portion and the second arm portion.
A drive device characterized by: In the drive device according to any one of claims 8 to 13,
The driven member is made of resin,
a recess for removing a gate formed in resin molding is formed on the translation section on the side opposite to the side on which the arm section is formed;
A drive device characterized by: an emission section that emits light corresponding to information to be displayed on the display section;
a reflecting member that reflects the light from the emitting portion toward the display portion;
the movable member holds the reflecting member, and the movable member is moved in the translation direction to change a reflection angle of the light at the reflecting member; and
Equipped with
A head-up display device.

Images