WO2020090463A1 - Power transmission device - Google Patents

Power transmission device Download PDF

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Publication number
WO2020090463A1
WO2020090463A1 PCT/JP2019/040607 JP2019040607W WO2020090463A1 WO 2020090463 A1 WO2020090463 A1 WO 2020090463A1 JP 2019040607 W JP2019040607 W JP 2019040607W WO 2020090463 A1 WO2020090463 A1 WO 2020090463A1
Authority
WO
WIPO (PCT)
Prior art keywords
power transmission
contact
lead screw
screw
pair
Prior art date
Application number
PCT/JP2019/040607
Other languages
French (fr)
Japanese (ja)
Inventor
幸夫 小笠原
将史 桜沢
Original Assignee
日本精機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本精機株式会社 filed Critical 日本精機株式会社
Priority to CN201980069947.9A priority Critical patent/CN112955678A/en
Priority to JP2020553758A priority patent/JP7377443B2/en
Publication of WO2020090463A1 publication Critical patent/WO2020090463A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Arrangement of adaptations of instruments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H21/00—Gearings comprising primarily only links or levers, with or without slides
    • F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
    • F16H21/44—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for conveying or interconverting oscillating or reciprocating motions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays

Definitions

  • the present invention relates to a power transmission device used in, for example, a head-up display device.
  • a stepping motor driving member
  • driving member to adjust the angular position of a concave mirror provided in a head-up display device for a vehicle, as described in Patent Document 1 below, for example. It is known to drive the concave mirror to adjust its angular position.
  • the above-mentioned head-up display device is mainly composed of a reflector that reflects display light emitted from a display and a housing that houses the display and the reflector, and is reflected by a concave mirror provided in the reflector.
  • the display light is emitted to the windshield of the vehicle, and the display image obtained by this irradiation is made visible to the user of the vehicle.
  • the reflector includes a concave mirror (reflecting member) that reflects the display light from the display, a resin mirror holder (holding member) that holds the concave mirror, and an outward facing direction of the mirror holder.
  • a power transmission device capable of adjusting the angular position of the mirror holder by rotating the mirror holder around a predetermined rotation axis by transmitting power to a projection piece that is a power transmission portion that is partially formed to project. Equipped with.
  • the power transmission device includes a stepping motor and a rotating shaft extending from the stepping motor, and has a driving means having a lead screw portion that is a thread groove on a peripheral surface of the rotating shaft, and a function of mainly fixing and supporting the stepping motor.
  • a power transmission member respectively formed.
  • the nut screwed to the lead screw portion by the rotation of the lead screw portion moves in the axial direction of the lead screw portion. And reciprocating along the nut, and in synchronization with the reciprocating movement of the nut, for example, one side surface of the both side surfaces of the nut is brought into contact with the one side surface of the pair of contact surfaces. Thrust acts on the surface.
  • the power transmission member moves in the axial direction (reciprocating movement) in synchronization with the reciprocating movement of the nut while being guided by the guide shaft. Then, with the movement of the power transmission member, the projection piece, which is in point contact with the pair of projections provided on the power transmission member, is provided with a power for rotating the mirror holder about the rotation axis. Transmitted.
  • the projection piece of the mirror holder is sandwiched between a pair of projections provided in the power transmission member. Since there is a dimensional tolerance in the dimensions of each part of the power transmission member or the mirror holder, in some cases, due to the dimensional tolerance, a protrusion provided on the power transmission member (for example, one of a pair of protrusions It is conceivable that a minute clearance may occur between the projection part) and the protruding piece provided on the mirror holder.
  • an object of the present invention is to provide a power transmission device that does not cause image blurring of a display image in order to address the above-described problems.
  • the present invention relates to a lead screw portion that is driven to rotate with the driving of a driving member, and a power transmission member that moves along the axial direction of the lead screw portion by the rotation of the lead screw portion and that transmits power to a power-transmitted portion.
  • the power transmission member includes a pair of wall portions facing each other with the power transmission portion interposed therebetween, and one of the pair of wall portions transmits the power transmission. Is provided with a protrusion protruding toward the side, and an elastic member is provided on the other wall of the pair of walls, and the first contact portion is in contact with the protrusion and the power transmission unit. And both of the elastic member and the second contact portion with which the power transmission portion abuts are not located on a virtual line extending parallel to the axial direction.
  • FIG. 1 is a schematic view of a head-up display device according to an exemplary embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of the head-up display device according to the same embodiment. It is a perspective view showing the 2nd reflector by the embodiment. It is sectional drawing which shows the 2nd reflector by the same embodiment, and the required part of a housing (hatching is abbreviate
  • FIG. 6 is a cross-sectional view showing a positional relationship among a driving unit, a moving member, and a power transmission member in the position adjusting unit according to the same embodiment.
  • FIG. 3 is an enlarged cross-sectional view of a main part showing a part of a power transmission member and a part of a holding member according to the same embodiment (hatching is omitted).
  • FIG. 9 is an enlarged cross-sectional view of a main part showing a part of a power transmission member and a part of a holding member according to a modified example of the same embodiment (hatching is omitted).
  • the head-up display device uses a windshield 13 of the vehicle 10 which is a projection member to display light L projected by a display device 12 which is a display unit arranged inside an instrument panel 11 of the vehicle 10.
  • the virtual image V is displayed by reflecting in the direction of the driver (user) 14.
  • the head-up display device emits (projects) the display light L emitted from the liquid crystal display device of the display device 12, which will be described later, to the windshield 13 (the projection member), and the display image ( The virtual image) V is visually recognized by the user 14.
  • the user 14 can observe the virtual image V by superimposing it on the landscape.
  • the display device 12 is mainly composed of a liquid crystal display 20, a first reflector 30, a second reflector 40, and a housing 50 as shown in FIG.
  • the liquid crystal display 20 is provided on the front side (directly above) of the light source 21 so as to form the display light L by transmitting the light source 21 including the light emitting diode mounted on the wiring board R and the illumination light from the light source 21. It is mainly composed of a TFT type liquid crystal display element (display element) 22 located. This means that the light source 21 is disposed behind (immediately below) the liquid crystal display element 22, and the liquid crystal display element 22 displays predetermined information (information to be described later) by the light emitted from the light source 21. I mean.
  • the liquid crystal display 20 is provided in the housing 50 so that the surface on the emission side of the display light L faces a cold mirror of the first reflector 30 described later, and the optical axis of the display light L is the cold. It is fixed and held at a position and orientation that intersects with the mirror.
  • the liquid crystal display element 22 illuminates and displays information (for example, vehicle speed and engine speed) to be displayed by an element driving circuit (not shown) as numerical values.
  • the liquid crystal display 20 outputs the display light L composed of light in the visible wavelength range, and for example, a light source 21 that emits red light (mainly in the emission wavelength range 610 to 640 nm) can be applied.
  • the information to be displayed is not limited to the vehicle speed and the engine speed, and various display forms can be adopted.
  • the first reflector 30 has a cold mirror 31 and a mounting member 32 for mounting and fixing the cold mirror 31 using a predetermined mounting means.
  • the cold mirror 31 includes a substantially rectangular glass substrate 31a and a first reflecting layer 31b formed on one surface of the glass substrate 31a (a surface facing a concave mirror of the second reflector 40 described later).
  • the first reflective layer 31b is composed of a multilayer interference film having different film thickness, and is formed by a method such as vapor deposition. Further, the cold mirror 31 is arranged in an inclined state at a position where the display light L emitted by the liquid crystal display 20 is reflected toward the second reflector 40 (the concave mirror) side.
  • the cold mirror 31 reflects light in the visible wavelength range (450 to 750 nm) including the emission wavelength range of the liquid crystal display 20 with a high reflectance (for example, 80% or more) and lowers the light other than the visible wavelength range. It reflects at a reflectance.
  • a mirror that reflects light (infrared rays or heat rays of sunlight) particularly in the infrared wavelength range other than the visible wavelength range with a low reflectance (for example, 15% or less) is applied.
  • the light that is not reflected by the first reflective layer 31b is configured to pass through the cold mirror 31.
  • the cold mirror 31 and the liquid crystal display 20 are arranged at positions that cannot be directly faced by a translucent cover of the housing 50, which will be described later. Is a structure that does not hit directly.
  • the mounting member 32 is made of, for example, a black synthetic resin material, and is fixed to the housing 50 by using an appropriate fixing means.
  • the second reflector 40 includes a concave mirror (reflecting member) 41 that reflects the display light L from the cold mirror 31 (that is, the display element 22) and a mirror holder that holds the concave mirror 41. And a position adjusting means 43 for adjusting an angular position (arrangement position) of the holding member 42.
  • the concave mirror 41 is formed by depositing a second reflective layer 41a on a resin substrate made of polycarbonate having a concave surface.
  • the concave mirror 41 is arranged in a tilted state at a position where the second reflection layer 41a faces the cold mirror 31 and the transparent cover and faces the transparent cover.
  • the concave mirror 41 reflects (projects) the display light L from the cold mirror 31 to the transparent cover (the windshield 13 of the vehicle 10) side while enlarging the display light L. This means that the concave mirror 41 magnifies the display light L reflected by the cold mirror 31 and projects the magnified display light L onto the windshield 13 through the translucent cover.
  • the holding member 42 is formed of a metal material (or a synthetic resin material), and includes a substantially cylindrical shaft portion 42a that is supported by a bearing portion (not shown) provided in the housing 50. Further, the holding member 42 includes a holding portion 42b which is a wall portion for holding (supporting) the concave mirror 41. In this case, the concave mirror 41 is fixedly held to the holding portion 42b with a double-sided adhesive tape (not shown) interposed between the concave mirror 41 and the holding portion 42b.
  • the holding member 42 and the concave mirror 41 held by the holding member 42 are configured to be angularly movable (rotatable) around a rotation axis (predetermined rotation axis) RA which is the central axis of the shaft portion 42a. There is.
  • 42c is a protruding piece (projecting portion) that is formed below the concave mirror 41 and is formed in a substantially L shape from behind the concave mirror 41 toward the second reflecting layer 41a side. It has a first extension portion 42d and a second extension portion 42e as a power transmission portion, and is integrally formed with the holding member 42.
  • the first extension portion 42d extends from the bottom surface portion 42f forming the bottom wall of the holding portion 42b of the holding member 42 toward the second reflective layer 41a side (in other words, the lead described later). It is a thin plate-shaped wall portion that extends substantially along the axial direction of the screw portion.
  • the second extended portion 42e which is the power-transmitted portion, is continuous with the first extended portion 42d so as to hang downward (from the lead screw portion side) from the tip end portion of the first extended portion 42d. It is a thin plate-shaped standing wall formed.
  • the second extension portion 42e is configured such that both side surfaces 42g and 42h (see FIG. 4) of the second extension portion 42e are in point contact with a protrusion portion and a leaf spring provided in a position adjusting means described later, respectively. It is pinched by and.
  • the side surface 42g of the both side surfaces 42g and 42h is referred to as one side surface, and the side surface 42h is also referred to as the other side surface.
  • the position adjusting means 43 is mainly composed of a driving means 61, a support body 62, a nut 63, a guide shaft 64, a power transmission member 65, and a vibration isolating member 66.
  • the driving means 61 has a stepping motor (driving member) 61a that generates a rotational driving force by energization, and a rotary shaft 61b extending from the stepping motor 61a.
  • the rotary shaft 61b includes a lead screw portion 61c that is a thread groove formed in a spiral shape on the peripheral surface thereof.
  • the lead screw portion 61c (rotating shaft 61b) is configured to be rotationally driven by receiving the rotational driving force from the stepping motor 61a.
  • the support body 62 is a metal motor case that fixedly supports the stepping motor 61a in an immovable state, is formed in a substantially U-shaped cross section, and is a substantially plate arranged along the axial direction X of the lead screw portion 61c.
  • the flat plate portion 62a has a pair of first and second flange portions 62b and 62c in which both end portions of the flat plate portion 62a are bent substantially at right angles.
  • a through hole 62d through which an end portion (end portion) 61d of the lead screw portion 61c penetrates and one end portion of the guide shaft 64 are fitted.
  • One fitting hole 62e is formed.
  • the first flange portion 62b and a required portion of the stepping motor 61a are appropriately fixed to each other by a fixing means, whereby the stepping motor 61a is fixedly supported by the support body 62 in an immovable state.
  • a hole (not shown) corresponding to the through hole 62d and a first fitting hole 62e are provided, and the guide shaft 64 is provided.
  • a second fitting hole 62f into which the other end is fitted is formed.
  • a bearing member G is mounted in the hole provided in the second flange portion 62c.
  • the tip portion 61e of the lead screw portion 61c which is located on the tip side of the protruding portion that penetrates the through hole 62d and projects toward the bearing member G, is rotatably supported by the bearing member G.
  • 62g and 62h are provided at positions corresponding to first and second screw holes of the vibration isolating member 66, which will be described later, and are screwed into the screw portion of the screw S1 that penetrates the first and second screw holes. It is the first and second screwing portions for making the above.
  • the first and second screwing portions 62g and 62h are formed on both sides of the flat plate portion 62a so as to project in a substantially cylindrical shape on the surface side of the flat plate portion 62a, and specifically, the first screwing portion is formed.
  • 62g is provided in the vicinity of the first flange portion 62b
  • the second screwing portion 62h is provided in the vicinity of the second flange portion 62c.
  • the nut 63 is screwed (engaged) with a predetermined portion of the lead screw portion 61c on the rotating shaft 61b, and the thrust given by the rotation of the lead screw portion 61c causes the nut 63 to move on the lead screw portion 61c in the axial direction X of the lead screw portion 61c. Move along. In this case, the nut 63 moves (reciprocates) to the distal end portion 61e or the distal end portion 61d of the lead screw portion 61c when the lead screw portion 61c is rotationally driven.
  • the guide shaft 64 is made of, for example, an elongated cylindrical metal material, and one end of the guide shaft 64 has a first fitting hole 62e of the support 62 so as to be substantially parallel to the lead screw portion 61c (rotary shaft 61b). And the other end is fitted into the second fitting hole 62f of the support body 62.
  • the power transmission member 65 is formed of a synthetic resin material such as polyacetal, and has a base portion 65a and a pair of wall portions 65c formed to project upward from the surface portion 65b of the base portion 65a so as to face each other, 65d. Further, in this case, the power transmission member 65 has a function of moving along the axial direction X of the lead screw portion 61c by the rotation of the lead screw portion 61c and transmitting power to the second extension portion 42e.
  • the facing wall located on the end portion 61d side of the lead screw portion 61c is defined as one wall portion 65c, and Of the wall portions 65c and 65d, the opposing wall located on the tip end 61e side of the lead screw portion 61c is referred to as the other wall portion 65d.
  • the base portion 65a is in contact with a required portion of the first and second side surfaces 63a and 63b, which are both side surfaces of the nut 63, and an insertion portion 65e having a substantially circular through hole shape for inserting the guide shaft 64, respectively ( A pair of first and second abutting portions 65f and 65g that are in surface contact) are formed (see FIG. 6).
  • the first and second contact portions 65f and 65g are integrally formed with the base portion 65a so as to partially sandwich the first and second side surfaces 63a and 63b of the nut 63.
  • the surface on the first flange portion 62b side is the first side surface 63a
  • the surface on the second flange portion 62c side is the second side surface 63b.
  • the first contact portion 65f and the first side surface 63a are in contact with each other
  • the second contact portion 65g and the second side surface 63b are in contact with each other
  • the first and second contact portions 65f and 65g It is assumed that the nut 63 is sandwiched.
  • the one wall portion 65c is provided with a substantially hemispherical protrusion 65h protruding toward the one side surface 42g side (the second extension portion 42e side), and the other wall portion 65d is provided with the other side surface 42h.
  • a metal leaf spring 65i as an elastic member for applying a pressing force described later is provided on the (second extension 42e) (see FIG. 7).
  • the second extension 42e when the second extension 42e is inserted between the protrusion 65h and the leaf spring 65i, the second extension 42e and the protrusion 65h are the top portions of the protrusion 65h.
  • the first contact portion T1 is always point-contacted.
  • the projection 65h may have any shape as long as it can make point contact with the one side surface 42g.
  • the leaf spring 65i is attached to, for example, the surface of the other wall portion 65d on the side surface 42h side of the other side, and is fixed to the other wall portion 65d by a suitable fixing means, and the fixing portion F1.
  • An inclined portion F2 extending from the upper end side of F1 so as to obliquely hang toward the other side surface 42h, and a bent tip portion F3 slightly bent from the lower end side of the inclined portion F2 toward the fixed portion F1 side.
  • the leaf spring 65i in a situation where the leaf spring 65i is attached to the other wall portion 65d, when the second extension portion 42e is inserted between the leaf spring 65i and the protrusion portion 65h, the leaf spring 65i becomes the inclined portion F2. With the bending tip F3 slightly elastically deformed to the side of the other wall portion 65d, the second extension portion 42e is formed at the second contact portion T2 which is the boundary portion between the inclined portion F2 and the bending tip F3. Abut.
  • the pressing force (elastic restoring force) acts on the leaf spring 65i toward the one wall portion 65c side
  • the second extension portion 42e is constantly urged toward the protrusion portion 65h side, and the second extension portion 42e is constantly biased.
  • the extension portion 42e (one side surface 42g) and the protrusion portion 65h are not always separated from each other.
  • the second extension 42e and the projection 65h are in point contact with each other at the first contact portion T1, and as a result, the second extension 42e is always between the projection 65h and the leaf spring 65i. , Will be pinched.
  • both the first contact portion T1 and the second contact portion T2 are imaginary extending in parallel to the axial direction X of the lead screw portion 61c.
  • the configuration not located on the line (virtual horizontal line) 70 is adopted.
  • the second contact portion T2 when the first contact portion T1 is located on the virtual line 70, the second contact portion T2 does not exist on the virtual line 70 and is located below the virtual line 70. There is. That is, this means that the first contact portion T1 and the second contact portion T2 have the same height in the height direction of the pair of wall portions 65c and 65d (the direction orthogonal to the axial direction X). This means that the second contact portion T2 is not located at the position and the second contact portion T2 is located below the first contact portion T1.
  • the anti-vibration member 66 is formed of a soft synthetic resin material (for example, polypropylene resin) having a vibration damping function, and includes a substantially rectangular flat plate-shaped base portion 66 a provided so as to correspond to the flat plate portion 62 a of the support body 62. ..
  • the anti-vibration member 66 has a vibration damping function of attenuating the vibration generated when the stepping motor 61a is driven, from the support 62 to the housing 50.
  • the first corner portion C1 provided at a position corresponding to a first boss portion of the housing 50 described later has the first ear portion 66b.
  • the base 66a is formed so as to project laterally so as to have a plate thickness substantially the same as the plate thickness of the base 66a.
  • a second ear portion 66c is provided in the second corner portion C2 that is provided in a position that is diagonal to the first corner portion C1 and that corresponds to a second boss portion of the housing 50 described later.
  • the base 66a is formed so as to project laterally so as to have a plate thickness substantially the same as the plate thickness of 66a.
  • 66d and 66e are provided so as to communicate with the first and second screwing portions 62g and 62h of the support body 62, respectively, and are through holes for allowing the screw portion of the screw S1 to penetrate from the rear side of the base portion 66a.
  • the first and second screw holes 66d and 66e are located near the center of the base 66a, and the first screw hole 66d is the first flange portion.
  • the second screw hole 66e is provided on the 62b side, and the second screw hole 66e is provided on the second flange portion 62c side.
  • the vibration isolation member 66 and the support body 62 are fixed by inserting the screw portion of the screw S1 from the rear side of the base portion 66a into the first and second screw holes 66d and 66e, respectively. This is completed by screwing required parts of the screw part of the screw S1 penetrating the screw holes 66d and 66e into the first and second screwing parts 62g and 62h, respectively. As a result, the support body 62 and the vibration isolating member 66 are fixed by the screw S1 which is the first fixing means.
  • 66f is provided so as to communicate with a later-described third screw engagement portion provided in the first boss portion, and from a through hole for allowing the screw portion of the screw S2 to penetrate from the front surface side of the base portion 66a.
  • the third screw hole 66f is formed at a predetermined position of the first ear portion 66b.
  • 66g is provided so as to communicate with a later-described fourth screw engagement portion provided in the second boss portion, and a through hole for allowing the screw portion of the screw S2 to penetrate from the surface side of the base portion 66a.
  • a fourth screw hole 66g is formed at a predetermined position of the second ear portion 66c.
  • the position adjusting means 43 configured as described above causes the nut 63 meshed with the lead screw portion 61c to move in the axial direction X. Move back and forth along. Then, for example, when the nut 63 is moving to the first flange portion 62b side, the first side surface 63a of the nut 63 is provided with a first contact portion 65f that is in surface contact with the first side surface 63a. A thrust force that moves the portion 62b is applied.
  • the power transmission member 65 is guided by the guide shaft 64, and in parallel with the movement of the nut 63, moves in parallel to the first flange portion 62b side along the axial direction X. Then, with the parallel movement of the power transmission member 65, the power for rotating the holding member 42 is transmitted to the second extension portion 42e interposed between the protrusion 65h and the leaf spring 65i. .. That is, this means that the power transmission to the second extension portion 42e causes the holding member 42 to rotate about the rotation axis RA in the arrow direction in FIG.
  • the housing 50 is formed of, for example, aluminum die casting, and includes an upper case 51 and a lower case 52, both of which are substantially recessed in cross section, and is a space portion which is an internal space formed by the upper case 51 and the lower case 52.
  • the liquid crystal display 20 liquid crystal display element 22
  • the upper case body 51 is formed with an opening window portion 51a that opens at an upper portion (on the windshield 13 side of the vehicle 10) where the concave mirror 41 is disposed.
  • the opening window portion 51a has an opening window portion 51a.
  • a light-transmitting cover 54 which is a light-transmitting portion, is arranged so as to close it.
  • the translucent cover 54 is made of a translucent synthetic resin material and has a function as a translucent member that transmits (passes) the display light L reflected by the concave mirror 41. That is, the display light L reflected by the concave mirror 41 is projected on the windshield 13 through the translucent cover 54 formed in the housing 50, whereby the display image (virtual image) V is displayed.
  • a pair of first and second boss portions 52a, 52b having a substantially cylindrical shape protruding from the bottom portion toward the vibration isolating member 66 side are provided. It is provided.
  • the first boss portion 52a includes a third screw screwing portion 52c for screwing the screw S2, and the third screw screwing portion 52c is the third screw screwing portion 52c. It communicates with the screw hole 66f.
  • the second boss portion 52b includes a fourth screw screw portion 52d for screwing the screw S2, and the fourth screw screw portion 52d is the fourth screw screw provided on the vibration isolator 66. It communicates with the hole 66g.
  • the housing 50 (the boss portions 52a and 52b) and the vibration isolating member 66 are fixed by inserting the screw portion of the screw S2 from the front surface side of the base portion 66a into the third and fourth screw holes 66f and 66g, respectively.
  • Required parts of the screw part of the screw S2 penetrating the screw holes 66f and 66g are screwed into the third and fourth screw screw parts 52c and 52d provided in the boss parts 52a and 52b, respectively.
  • the housing 50 (each boss portion 52a, 52b) and the vibration isolating member 66 are fixed by the screw S2 which is the second fixing means.
  • the one wall portion 65c of the power transmission member 65 is provided with the protrusion 65h protruding toward the second extension portion 42e side, and the other wall portion 65d of the power transmission member 65 is provided.
  • Both T2 and T2 are not located on a virtual line 70 extending parallel to the axial direction X of the lead screw portion 61c.
  • the second extension portion 42e when the second extension portion 42e is pressed toward the one wall portion 65c by the leaf spring 65i (the elastic return force), the second extension portion 42e (the protruding piece 42c) and the protrusion portion 65h are always It does not come in contact with and separate from each other. As a result, the generation of the minute clearance that has been conventionally formed between the protrusion and the protrusion is suppressed, and the fixing reliability of the second extension 42e sandwiched between the protrusion 65h and the leaf spring 65i is secured.
  • the holding member 42 does not rattle when power is transmitted to the holding member 42 by the second extension 42e, and image blurring of the display image V visually recognized by the user 14 occurs through the windshield 13. There is no fear.
  • the second contact portion T2 is located below the first contact portion T1 in the height direction of the pair of wall portions 65c and 65d. It suffices that the contact portion T1 and the second contact portion T2 are not provided at the same height position in the height direction, and for example, as a modified example of this embodiment, FIG. It goes without saying that the second contact portion T2 may be located above the first contact portion T1 in the height direction as shown in FIG.
  • First reflector 40 Second reflector 41 concave mirror (reflection member) 42 Holding member 42c protruding piece 42d first extension 42e Second extension portion (power-transmitted portion) 42g One side (one side) 42h The other side surface (the other surface) 43 Position adjusting means 61 Drive means 61a Stepping motor (driving member) 61c Lead screw part 62 support 63 nuts 64 guide shaft 65 Power transmission part 65a base 65c One wall 65d The other wall 65h protrusion 65i leaf spring (elastic member) 66 Anti-vibration member 70 virtual lines (virtual horizontal lines) L display light RA rotation axis T1 first contact part T2 Second contact part X-axis direction

Abstract

Provided is a power transmission device with which image blurring of a display image is not a concern. A power transmission member (65) has a pair of wall parts (65c, 65d) facing each other with a second extension part (42e) interposed therebetween. One wall part (65c) among the pair of wall parts (65c, 65d) is provided with a protrusion part (65h) protruding toward the second extension part (42e). The other wall part (65d) among the pair of wall parts (65c, 65d) is provided with a leaf spring (65i). Both a first abutment part (T1) on which the protrusion part (65h) and the second extension part (42e) abut and a second abutment part (T2) on which the leaf spring (65i) and the second extension part (42e) abut are not located on a virtual line (70) extending in parallel to an axial direction X.

Description

動力伝達装置Power transmission device
　本発明は、例えばヘッドアップディスプレイ装置に用いられる動力伝達装置に関するものである。  The present invention relates to a power transmission device used in, for example, a head-up display device.
　従来より、この種の動力伝達装置にあっては、例えば下記特許文献１に記載のごとく、車両用のヘッドアップディスプレイ装置に備えられる凹面鏡の角度位置を調整すべく、ステッピングモータ（駆動部材）を駆動させて凹面鏡の角度位置調整を行うものが知られている。 Conventionally, in a power transmission device of this type, a stepping motor (driving member) is used to adjust the angular position of a concave mirror provided in a head-up display device for a vehicle, as described in Patent Document 1 below, for example. It is known to drive the concave mirror to adjust its angular position.
　ここで、上述のヘッドアップディスプレイ装置は、表示器から発せられる表示光を反射させる反射器と、表示器及び反射器を収納するハウジングとから主に構成され、反射器に備えられる凹面鏡によって反射された表示光を車両のフロントガラスに照射し、この照射によって得られた表示像を車両の利用者に視認させるものである。 Here, the above-mentioned head-up display device is mainly composed of a reflector that reflects display light emitted from a display and a housing that houses the display and the reflector, and is reflected by a concave mirror provided in the reflector. The display light is emitted to the windshield of the vehicle, and the display image obtained by this irradiation is made visible to the user of the vehicle.
　そして、この場合、反射器は、表示器からの表示光を反射させる凹面鏡（反射部材）と、この凹面鏡を保持する樹脂製のミラーホルダ（保持部材）と、このミラーホルダの外方に向けて部分的に突出形成される被動力伝達部である突出片に動力を伝達させることでミラーホルダを所定の回動軸線を中心として回動させ、ミラーホルダの角度位置を調整可能な動力伝達装置とを備える。 Then, in this case, the reflector includes a concave mirror (reflecting member) that reflects the display light from the display, a resin mirror holder (holding member) that holds the concave mirror, and an outward facing direction of the mirror holder. A power transmission device capable of adjusting the angular position of the mirror holder by rotating the mirror holder around a predetermined rotation axis by transmitting power to a projection piece that is a power transmission portion that is partially formed to project. Equipped with.
　動力伝達装置は、ステッピングモータ及び当該ステッピングモータから延出する回転軸を備えるとともに回転軸周面にネジ溝であるリードスクリュー部の形成された駆動手段と、主にステッピングモータを固定支持する機能を有する金属製の支持体と、リードスクリュー部に噛み合うように固定された金属製のナットと、リードスクリュー部と平行状態をなすように支持体に嵌合されたガイドシャフトと、基部（ベース部）にナットの両側面と各々当接する一対の当接面が形成されるとともに当該基部の前方に突出する一対の対向壁部にミラーホルダの前記突出片と点接触する半球形状からなる一対の突起部が各々形成された動力伝達部材とから構成される。 The power transmission device includes a stepping motor and a rotating shaft extending from the stepping motor, and has a driving means having a lead screw portion that is a thread groove on a peripheral surface of the rotating shaft, and a function of mainly fixing and supporting the stepping motor. A metal support body, a metal nut fixed so as to mesh with the lead screw portion, a guide shaft fitted to the support body so as to be in parallel with the lead screw portion, and a base portion (base portion) A pair of abutment surfaces each of which comes into contact with both side surfaces of the nut, and a pair of hemispherical projections that make point contact with the projecting pieces of the mirror holder on a pair of opposing wall portions projecting forward of the base. And a power transmission member respectively formed.
　このように構成された動力伝達装置は、ステッピングモータの駆動に伴いリードスクリュー部が回転駆動されると、このリードスクリュー部の回転によりリードスクリュー部に螺合されたナットがリードスクリュー部の軸方向に沿い往復移動し、このナットの往復移動に同期して例えばナットにおける前記両側面のうち一方の側面には、前記一対の当接面において、前記一方の側面と当接する側の一方の当接面箇所に推力が作用する。 In the power transmission device configured as described above, when the lead screw portion is driven to rotate in accordance with the driving of the stepping motor, the nut screwed to the lead screw portion by the rotation of the lead screw portion moves in the axial direction of the lead screw portion. And reciprocating along the nut, and in synchronization with the reciprocating movement of the nut, for example, one side surface of the both side surfaces of the nut is brought into contact with the one side surface of the pair of contact surfaces. Thrust acts on the surface.
　そして、この推力の作用によって、動力伝達部材が、ガイドシャフトに案内された状態でナットの往復移動に同期して前記軸方向に沿い移動（往復移動）する。すると、動力伝達部材の移動に伴い、動力伝達部材に備えられる前述した一対の突起部と点接触している前記突出片にはミラーホルダを前記回動軸線を中心として回動させるような動力が伝達される。  By the action of this thrust, the power transmission member moves in the axial direction (reciprocating movement) in synchronization with the reciprocating movement of the nut while being guided by the guide shaft. Then, with the movement of the power transmission member, the projection piece, which is in point contact with the pair of projections provided on the power transmission member, is provided with a power for rotating the mirror holder about the rotation axis. Transmitted.
　つまり、このことは、前記突出片への動力伝達によりミラーホルダ並びにミラーホルダに保持された凹面鏡が、前記回動軸線を中心として所定角度だけ回動することを意味している。そして、このように凹面鏡を角度移動させることで、前記表示光のフロントガラスに対する投射方向が調整され、これに伴い車両の利用者が視認可能な表示像の位置をフロントガラスの上下方向に移動することが可能となる。 That is, this means that the power transmission to the projecting piece causes the mirror holder and the concave mirror held by the mirror holder to rotate by a predetermined angle about the rotation axis. By thus angularly moving the concave mirror, the projection direction of the display light with respect to the windshield is adjusted, and accordingly, the position of the display image visible to the vehicle user is moved in the vertical direction of the windshield. It becomes possible.
特開２００９－７３４６１号公報JP, 2009-73461, A
　ところで、特許文献１に記載のヘッドアップディスプレイ装置に用いられる動力伝達装置の場合、動力伝達部材に備えられる一対の突起部の間にミラーホルダの突出片を挟持する構造となっているが、一般的に動力伝達部材やミラーホルダにおける各部の寸法には寸法公差が存在するため、場合によっては前記寸法公差に起因して、動力伝達部材に設けられた突起部（例えば一対の突起部のうち片方の突起部）とミラーホルダに設けられた突出片との間に微少なクリアランスが生じることが考えられる。 By the way, in the case of the power transmission device used in the head-up display device described in Patent Document 1, the projection piece of the mirror holder is sandwiched between a pair of projections provided in the power transmission member. Since there is a dimensional tolerance in the dimensions of each part of the power transmission member or the mirror holder, in some cases, due to the dimensional tolerance, a protrusion provided on the power transmission member (for example, one of a pair of protrusions It is conceivable that a minute clearance may occur between the projection part) and the protruding piece provided on the mirror holder.
　すると、この微少なクリアランスによって、ミラーホルダ（つまりミラーホルダに保持された凹面鏡）ががたつくように傾動することが考えられ、結果的にフロントガラス越しに車両の利用者が視認する表示像の像ぶれが発生する虞がある。
　そこで本発明は、前述の課題に対して対処するため、表示像の像ぶれが発生する虞のない動力伝達装置の提供を目的とするものである。 Then, the minute clearance may cause the mirror holder (that is, the concave mirror held by the mirror holder) to tilt and rattling, resulting in image blurring of the display image visually recognized by the vehicle user through the windshield. May occur.
Therefore, an object of the present invention is to provide a power transmission device that does not cause image blurring of a display image in order to address the above-described problems.
　本発明は、駆動部材の駆動に伴い回転駆動されるリードスクリュー部と、前記リードスクリュー部の回転により前記リードスクリュー部の軸方向に沿い移動し、被動力伝達部に動力を伝達する動力伝達部材とを備えた動力伝達装置において、前記動力伝達部材は、前記被動力伝達部を挟んで対向する一対の壁部を有し、前記一対の壁部のうち一方の壁部には前記被動力伝達部側に向けて突出する突起部が設けられ、前記一対の壁部のうち他方の壁部には弾性部材が設けられ、前記突起部と前記被動力伝達部とが当接する第１当接部分と、前記弾性部材と前記被動力伝達部とが当接する第２当接部分との双方が、前記軸方向と平行に延びる仮想ライン上に位置していないことを特徴とする。 The present invention relates to a lead screw portion that is driven to rotate with the driving of a driving member, and a power transmission member that moves along the axial direction of the lead screw portion by the rotation of the lead screw portion and that transmits power to a power-transmitted portion. The power transmission member includes a pair of wall portions facing each other with the power transmission portion interposed therebetween, and one of the pair of wall portions transmits the power transmission. Is provided with a protrusion protruding toward the side, and an elastic member is provided on the other wall of the pair of walls, and the first contact portion is in contact with the protrusion and the power transmission unit. And both of the elastic member and the second contact portion with which the power transmission portion abuts are not located on a virtual line extending parallel to the axial direction.
　本発明によれば、所期の目的を達成でき、表示像の像ぶれが発生する虞のない動力伝達装置を提供できる。  According to the present invention, it is possible to provide a power transmission device that can achieve a desired object and that does not cause image blurring of a display image.
本発明の実施形態によるヘッドアップディスプレイ装置の概略図である。1 is a schematic view of a head-up display device according to an exemplary embodiment of the present invention. 同実施形態によるヘッドアップディスプレイ装置の断面図である。FIG. 7 is a cross-sectional view of the head-up display device according to the same embodiment. 同実施形態による第２反射器を示す斜視図である。It is a perspective view showing the 2nd reflector by the embodiment. 同実施形態による第２反射器とハウジングの所要部とを示す断面図である（ハッチングは省略）。It is sectional drawing which shows the 2nd reflector by the same embodiment, and the required part of a housing (hatching is abbreviate | omitted). 同実施形態による位置調整手段の各部と保持部材の一部を示す斜視図である。It is a perspective view showing each part of position adjusting means and a part of holding member by the embodiment. 同実施形態による位置調整手段における駆動手段と移動部材と動力伝達部材との位置関係を示す断面図である。FIG. 6 is a cross-sectional view showing a positional relationship among a driving unit, a moving member, and a power transmission member in the position adjusting unit according to the same embodiment. 同実施形態による動力伝達部材の一部と保持部材の一部とを示す要部拡大断面図である（ハッチングは省略）。FIG. 3 is an enlarged cross-sectional view of a main part showing a part of a power transmission member and a part of a holding member according to the same embodiment (hatching is omitted). 同実施形態の変形例による動力伝達部材の一部と保持部材の一部とを示す要部拡大断面図である（ハッチングは省略）。FIG. 9 is an enlarged cross-sectional view of a main part showing a part of a power transmission member and a part of a holding member according to a modified example of the same embodiment (hatching is omitted).
　以下、図１～図７に基づいて、本発明の動力伝達装置を車両用のヘッドアップディスプレイ装置に備えられる第２反射器に適用した一実施形態を説明する。 An embodiment in which the power transmission device of the present invention is applied to a second reflector included in a vehicle head-up display device will be described below with reference to FIGS. 1 to 7.
　ヘッドアップディスプレイ装置は、図１に示すように車両１０のインパネ１１内部に配設された表示ユニットである表示装置１２が投射する表示光Ｌを投影部材である車両１０のフロントガラス１３で車両１０の運転者（利用者）１４の方向に反射させ、虚像Ｖの表示を行うものである。換言すれば、ヘッドアップディスプレイ装置は、表示装置１２の後述する液晶表示器から発せられる表示光Ｌをフロントガラス１３（前記投影部材）に出射（投射）し、この出射によって得られた表示像（虚像）Ｖを利用者１４に視認させるものである。これにより利用者１４は、虚像Ｖを風景と重畳させて観察することができる。 As shown in FIG. 1, the head-up display device uses a windshield 13 of the vehicle 10 which is a projection member to display light L projected by a display device 12 which is a display unit arranged inside an instrument panel 11 of the vehicle 10. The virtual image V is displayed by reflecting in the direction of the driver (user) 14. In other words, the head-up display device emits (projects) the display light L emitted from the liquid crystal display device of the display device 12, which will be described later, to the windshield 13 (the projection member), and the display image ( The virtual image) V is visually recognized by the user 14. Thereby, the user 14 can observe the virtual image V by superimposing it on the landscape.
　表示装置１２は、図２に示すように液晶表示器２０と、第１反射器３０と、第２反射器４０と、ハウジング５０とから主に構成されている。 The display device 12 is mainly composed of a liquid crystal display 20, a first reflector 30, a second reflector 40, and a housing 50 as shown in FIG.
　液晶表示器２０は、配線基板Ｒに実装された発光ダイオードからなる光源２１と、この光源２１からの照明光を透過して表示光Ｌを形成するように光源２１の前方側（真上）に位置するＴＦＴ型の液晶表示素子（表示素子）２２とから主に構成される。このことは、液晶表示素子２２の背後（直下）に光源２１が配設され、液晶表示素子２２は、光源２１から発せられる光により、所定情報（後述する表示すべき情報）を表示することを意味している。 The liquid crystal display 20 is provided on the front side (directly above) of the light source 21 so as to form the display light L by transmitting the light source 21 including the light emitting diode mounted on the wiring board R and the illumination light from the light source 21. It is mainly composed of a TFT type liquid crystal display element (display element) 22 located. This means that the light source 21 is disposed behind (immediately below) the liquid crystal display element 22, and the liquid crystal display element 22 displays predetermined information (information to be described later) by the light emitted from the light source 21. I mean.
　この場合、液晶表示器２０は、表示光Ｌの出射側の面が第１反射器３０の後述するコールドミラーに対向するようにしてハウジング５０内に設けられ、表示光Ｌの光軸が前記コールドミラーに交わるような位置や向きにて固定保持される。 In this case, the liquid crystal display 20 is provided in the housing 50 so that the surface on the emission side of the display light L faces a cold mirror of the first reflector 30 described later, and the optical axis of the display light L is the cold. It is fixed and held at a position and orientation that intersects with the mirror.
　また液晶表示素子２２は、図示しない素子駆動回路によって表示すべき情報（例えば車両の速度やエンジン回転数）を数値等で発光表示する。液晶表示器２０は、可視波長域の光からなる表示光Ｌを出力するもので、例えば赤色光（主に発光波長域６１０～６４０ｎｍ）を発する光源２１を適用することができる。なお、前記表示すべき情報は、車両の速度やエンジン回転数に限らず、あらゆる表示形態を採用できることは言うまでもない。 Further, the liquid crystal display element 22 illuminates and displays information (for example, vehicle speed and engine speed) to be displayed by an element driving circuit (not shown) as numerical values. The liquid crystal display 20 outputs the display light L composed of light in the visible wavelength range, and for example, a light source 21 that emits red light (mainly in the emission wavelength range 610 to 640 nm) can be applied. Needless to say, the information to be displayed is not limited to the vehicle speed and the engine speed, and various display forms can be adopted.
　第１反射器３０は、コールドミラー３１と、このコールドミラー３１を所定の取付手段を用いて取付固定するための取付部材３２とを有している。 The first reflector 30 has a cold mirror 31 and a mounting member 32 for mounting and fixing the cold mirror 31 using a predetermined mounting means.
　コールドミラー３１は、略矩形状のガラス基板３１ａと、このガラス基板３１ａの片面（第２反射器４０の後述する凹面鏡と向かい合う面）に形成された第１の反射層３１ｂとを備える。第１の反射層３１ｂは、膜厚が異なる多層の干渉膜からなるものであり、蒸着等の方法で形成されている。また、コールドミラー３１は、液晶表示器２０が発した表示光Ｌを、第２反射器４０（前記凹面鏡）側へ反射させるような位置に傾斜状態にて配設される。 The cold mirror 31 includes a substantially rectangular glass substrate 31a and a first reflecting layer 31b formed on one surface of the glass substrate 31a (a surface facing a concave mirror of the second reflector 40 described later). The first reflective layer 31b is composed of a multilayer interference film having different film thickness, and is formed by a method such as vapor deposition. Further, the cold mirror 31 is arranged in an inclined state at a position where the display light L emitted by the liquid crystal display 20 is reflected toward the second reflector 40 (the concave mirror) side.
　なお、コールドミラー３１は、液晶表示器２０の発光波長域を含む可視波長域（４５０～７５０ｎｍ）の光を高い反射率（例えば８０％以上）で反射し、前記可視波長域以外の光を低い反射率で反射するものである。この場合、コールドミラー３１は、前記可視波長域以外の特に赤外波長域の光（赤外線あるいは太陽光の熱線）を低い反射率（例えば１５％以下）にて反射するものが適用される。なお、第１の反射層３１ｂにて反射されない光は、コールドミラー３１を透過するように構成される。 The cold mirror 31 reflects light in the visible wavelength range (450 to 750 nm) including the emission wavelength range of the liquid crystal display 20 with a high reflectance (for example, 80% or more) and lowers the light other than the visible wavelength range. It reflects at a reflectance. In this case, as the cold mirror 31, a mirror that reflects light (infrared rays or heat rays of sunlight) particularly in the infrared wavelength range other than the visible wavelength range with a low reflectance (for example, 15% or less) is applied. The light that is not reflected by the first reflective layer 31b is configured to pass through the cold mirror 31.
　また本実施形態の場合、コールドミラー３１並びに液晶表示器２０は、ハウジング５０の後述する透光性カバーから直接、臨めない位置に配設され、前記太陽光等の外部からの光（外光）が直接、当たらない構造となっている。なお、取付部材３２は、例えば黒色の合成樹脂材料からなり、適宜固定手段を用いてハウジング５０に固定される。 Further, in the case of the present embodiment, the cold mirror 31 and the liquid crystal display 20 are arranged at positions that cannot be directly faced by a translucent cover of the housing 50, which will be described later. Is a structure that does not hit directly. The mounting member 32 is made of, for example, a black synthetic resin material, and is fixed to the housing 50 by using an appropriate fixing means.
　第２反射器４０は、図２～図４に示すようにコールドミラー３１（つまり、表示素子２２）からの表示光Ｌを反射させる凹面鏡（反射部材）４１と、この凹面鏡４１を保持するミラーホルダとしての保持部材４２と、この保持部材４２の角度位置（配設位置）を調整するための位置調整手段４３とを備える。 As shown in FIGS. 2 to 4, the second reflector 40 includes a concave mirror (reflecting member) 41 that reflects the display light L from the cold mirror 31 (that is, the display element 22) and a mirror holder that holds the concave mirror 41. And a position adjusting means 43 for adjusting an angular position (arrangement position) of the holding member 42.
　凹面鏡４１は、凹面を有するポリカーボネートからなる樹脂基板に第２の反射層４１ａを蒸着形成したものである。この凹面鏡４１は、その第２の反射層４１ａがコールドミラー３１並びに前記透光性カバーに対向し、前記透光性カバーから臨める位置に傾斜状態にて配設される。 The concave mirror 41 is formed by depositing a second reflective layer 41a on a resin substrate made of polycarbonate having a concave surface. The concave mirror 41 is arranged in a tilted state at a position where the second reflection layer 41a faces the cold mirror 31 and the transparent cover and faces the transparent cover.
　また凹面鏡４１は、コールドミラー３１からの表示光Ｌを拡大しつつ、前記透光性カバー（車両１０のフロントガラス１３）側へ反射（投射）させるものである。このことは、凹面鏡４１が、コールドミラー３１によって反射された表示光Ｌを拡大し、この拡大された表示光Ｌを前記透光性カバーを通じてフロントガラス１３に投射することを意味している。 Further, the concave mirror 41 reflects (projects) the display light L from the cold mirror 31 to the transparent cover (the windshield 13 of the vehicle 10) side while enlarging the display light L. This means that the concave mirror 41 magnifies the display light L reflected by the cold mirror 31 and projects the magnified display light L onto the windshield 13 through the translucent cover.
　保持部材４２は、金属材料（または合成樹脂材料）によって形成され、ハウジング５０に設けられた軸受部（図示省略）に軸支される略円柱状の軸部４２ａを備える。また、保持部材４２は、凹面鏡４１を保持する（支える）ための壁部である保持部４２ｂを備える。なお、この場合、凹面鏡４１と保持部４２ｂとの間には両面粘着テープ（図示省略）が介在した状態で、凹面鏡４１が保持部４２ｂに対し固定保持される。また、保持部材４２並びにこれに保持される凹面鏡４１は、軸部４２ａの中心軸である回動軸線（所定の回動軸線）ＲＡを中心として角度移動可能（回動可能）な構成となっている。 The holding member 42 is formed of a metal material (or a synthetic resin material), and includes a substantially cylindrical shaft portion 42a that is supported by a bearing portion (not shown) provided in the housing 50. Further, the holding member 42 includes a holding portion 42b which is a wall portion for holding (supporting) the concave mirror 41. In this case, the concave mirror 41 is fixedly held to the holding portion 42b with a double-sided adhesive tape (not shown) interposed between the concave mirror 41 and the holding portion 42b. Further, the holding member 42 and the concave mirror 41 held by the holding member 42 are configured to be angularly movable (rotatable) around a rotation axis (predetermined rotation axis) RA which is the central axis of the shaft portion 42a. There is.
　なお、４２ｃは、凹面鏡４１の下方において、凹面鏡４１の背後から第２の反射層４１ａ側に向けて略Ｌ字形状に突出形成された突出片（突出部）であり、この突出片４２ｃは、第１の延長部４２ｄと、被動力伝達部としての第２の延長部４２ｅとを有し、保持部材４２に一体形成されている。 In addition, 42c is a protruding piece (projecting portion) that is formed below the concave mirror 41 and is formed in a substantially L shape from behind the concave mirror 41 toward the second reflecting layer 41a side. It has a first extension portion 42d and a second extension portion 42e as a power transmission portion, and is integrally formed with the holding member 42.
　第１の延長部４２ｄは、図４中、保持部材４２における保持部４２ｂの底壁を構成する底面部４２ｆから第２の反射層４１ａ側に向けて延在する（換言すれば、後述するリードスクリュー部の略軸方向に沿って延在する）薄板状壁部である。  In FIG. 4, the first extension portion 42d extends from the bottom surface portion 42f forming the bottom wall of the holding portion 42b of the holding member 42 toward the second reflective layer 41a side (in other words, the lead described later). It is a thin plate-shaped wall portion that extends substantially along the axial direction of the screw portion.
　また、被動力伝達部である第２の延長部４２ｅは、第１の延長部４２ｄの先端部分から下方（前記リードスクリュー部側）に向けて垂下するように、第１の延長部４２ｄに連続形成された薄板状立壁部である。この第２の延長部４２ｅは、その両側面４２ｇ、４２ｈ（図４参照）が、後述する位置調整手段に備えられる突起部と板ばねに各々点接触するように、前記突起部と前記板バネとにより挟持される。以下の説明では、両側面４２ｇ、４２ｈのうち側面４２ｇを一方の側面とし、側面４２ｈを他方の側面とも言う。 Further, the second extended portion 42e, which is the power-transmitted portion, is continuous with the first extended portion 42d so as to hang downward (from the lead screw portion side) from the tip end portion of the first extended portion 42d. It is a thin plate-shaped standing wall formed. The second extension portion 42e is configured such that both side surfaces 42g and 42h (see FIG. 4) of the second extension portion 42e are in point contact with a protrusion portion and a leaf spring provided in a position adjusting means described later, respectively. It is pinched by and. In the following description, the side surface 42g of the both side surfaces 42g and 42h is referred to as one side surface, and the side surface 42h is also referred to as the other side surface.
　位置調整手段４３は、図３から図５に示すように駆動手段６１と、支持体６２と、ナット６３と、ガイドシャフト６４と、動力伝達部材６５と、防振部材６６とから主に構成され、保持部材４２を回動軸線ＲＡを中心として回動させ、保持部材４２（凹面鏡４１）の角度位置を調整する（換言すれば表示光Ｌの投射方向を調整する）ために用いられる。  As shown in FIGS. 3 to 5, the position adjusting means 43 is mainly composed of a driving means 61, a support body 62, a nut 63, a guide shaft 64, a power transmission member 65, and a vibration isolating member 66. , Is used to rotate the holding member 42 about the rotation axis RA to adjust the angular position of the holding member 42 (concave mirror 41) (in other words, to adjust the projection direction of the display light L).
　駆動手段６１は、通電により回転駆動力を発生するステッピングモータ（駆動部材）６１ａと、このステッピングモータ６１ａから延出する回転軸６１ｂとを有する。回転軸６１ｂは、その周面において螺旋状に形成されたねじ溝であるリードスクリュー部６１ｃを備える。リードスクリュー部６１ｃ（回転軸６１ｂ）は、ステッピングモータ６１ａからの前記回転駆動力を受けて回転駆動されるようになっている。 The driving means 61 has a stepping motor (driving member) 61a that generates a rotational driving force by energization, and a rotary shaft 61b extending from the stepping motor 61a. The rotary shaft 61b includes a lead screw portion 61c that is a thread groove formed in a spiral shape on the peripheral surface thereof. The lead screw portion 61c (rotating shaft 61b) is configured to be rotationally driven by receiving the rotational driving force from the stepping motor 61a.
　支持体６２は、ステッピングモータ６１ａを不動状態に固定支持する金属製のモータケースであり、断面略Ｕ字形状に形成され、リードスクリュー部６１ｃの軸方向Ｘに沿うように配設される略板状の平板部６２ａと、この平板部６２ａの両端部分が略直角に折り曲げられた一対の第１、第２のフランジ部６２ｂ、６２ｃとを有する。 The support body 62 is a metal motor case that fixedly supports the stepping motor 61a in an immovable state, is formed in a substantially U-shaped cross section, and is a substantially plate arranged along the axial direction X of the lead screw portion 61c. The flat plate portion 62a has a pair of first and second flange portions 62b and 62c in which both end portions of the flat plate portion 62a are bent substantially at right angles.
　ステッピングモータ６１ａ側に位置する第１のフランジ部６２ｂには、リードスクリュー部６１ｃの端部（末端部）６１ｄが貫通する貫通孔６２ｄと、ガイドシャフト６４の一方の端部が嵌装される第１の嵌合孔６２ｅとが形成される。なお、第１のフランジ部６２ｂと、ステッピングモータ６１ａの所要部とは、適宜固定手段によって互いに固定され、これによりステッピングモータ６１ａが支持体６２によって不動状態に固定支持される。 In the first flange portion 62b located on the stepping motor 61a side, a through hole 62d through which an end portion (end portion) 61d of the lead screw portion 61c penetrates and one end portion of the guide shaft 64 are fitted. One fitting hole 62e is formed. The first flange portion 62b and a required portion of the stepping motor 61a are appropriately fixed to each other by a fixing means, whereby the stepping motor 61a is fixedly supported by the support body 62 in an immovable state.
　一方、第１のフランジ部６２ｂと対をなす第２のフランジ部６２ｃ側には、貫通孔６２ｄに対応する孔（図示省略）と、第１の嵌合孔６２ｅに対応し、ガイドシャフト６４の他方の端部が嵌装される第２の嵌合孔６２ｆとが形成される。なお、第２のフランジ部６２ｃに設けられる前記孔には、軸受部材Ｇが装着される。そして、貫通孔６２ｄを貫通して軸受部材Ｇ側に突出する突出部分の先端側に位置するリードスクリュー部６１ｃの先端部６１ｅ部分が、軸受部材Ｇを通じて回転自在に軸支される。  On the other hand, on the side of the second flange portion 62c that forms a pair with the first flange portion 62b, a hole (not shown) corresponding to the through hole 62d and a first fitting hole 62e are provided, and the guide shaft 64 is provided. A second fitting hole 62f into which the other end is fitted is formed. A bearing member G is mounted in the hole provided in the second flange portion 62c. The tip portion 61e of the lead screw portion 61c, which is located on the tip side of the protruding portion that penetrates the through hole 62d and projects toward the bearing member G, is rotatably supported by the bearing member G.
　なお、６２ｇ、６２ｈは、防振部材６６の後述する第１、第２のネジ孔に対応した位置に設けられ、前記第１、第２のネジ孔を貫通するネジＳ１のネジ部を螺合させるための第１、第２の螺合部である。第１、第２の螺合部６２ｇ、６２ｈは、平板部６２ａの両端側において、平板部６２ａの表面側に略円筒状に各々突出形成されており、具体的には第１の螺合部６２ｇが第１のフランジ部６２ｂの近傍に設けられ、第２の螺合部６２ｈが第２のフランジ部６２ｃの近傍に設けられる。  Note that 62g and 62h are provided at positions corresponding to first and second screw holes of the vibration isolating member 66, which will be described later, and are screwed into the screw portion of the screw S1 that penetrates the first and second screw holes. It is the first and second screwing portions for making the above. The first and second screwing portions 62g and 62h are formed on both sides of the flat plate portion 62a so as to project in a substantially cylindrical shape on the surface side of the flat plate portion 62a, and specifically, the first screwing portion is formed. 62g is provided in the vicinity of the first flange portion 62b, and the second screwing portion 62h is provided in the vicinity of the second flange portion 62c.
　ナット６３は、回転軸６１ｂにおけるリードスクリュー部６１ｃの所定箇所に螺合（噛合）され、リードスクリュー部６１ｃの回転により与えられた推力によって、リードスクリュー部６１ｃ上をリードスクリュー部６１ｃの軸方向Ｘに沿い移動する。なお、この場合、ナット６３は、リードスクリュー部６１ｃが回転駆動されることにより、リードスクリュー部６１ｃの先端部６１ｅあるいは末端部６１ｄに移動（往復移動）するようになっている。  The nut 63 is screwed (engaged) with a predetermined portion of the lead screw portion 61c on the rotating shaft 61b, and the thrust given by the rotation of the lead screw portion 61c causes the nut 63 to move on the lead screw portion 61c in the axial direction X of the lead screw portion 61c. Move along. In this case, the nut 63 moves (reciprocates) to the distal end portion 61e or the distal end portion 61d of the lead screw portion 61c when the lead screw portion 61c is rotationally driven.
　ガイドシャフト６４は、例えば細長円柱形状の金属材からなり、リードスクリュー部６１ｃ（回転軸６１ｂ）と略平行状態をなすように、その一方の端部が支持体６２の第１の嵌合孔６２ｅに嵌合されるとともに他方の端部が支持体６２の第２の嵌合孔６２ｆに嵌合される。 The guide shaft 64 is made of, for example, an elongated cylindrical metal material, and one end of the guide shaft 64 has a first fitting hole 62e of the support 62 so as to be substantially parallel to the lead screw portion 61c (rotary shaft 61b). And the other end is fitted into the second fitting hole 62f of the support body 62.
　動力伝達部材６５は、ポリアセタール等の合成樹脂材料によって形成され、ベース部６５ａと、このベース部６５ａの表面部６５ｂから上方に向けて、互いに対向するように突出形成された一対の壁部６５ｃ、６５ｄとを有している。また、この場合、動力伝達部材６５は、リードスクリュー部６１ｃの回転によりリードスクリュー部６１ｃの軸方向Ｘに沿い移動し、第２の延長部４２ｅに動力を伝達する機能を備えている。 The power transmission member 65 is formed of a synthetic resin material such as polyacetal, and has a base portion 65a and a pair of wall portions 65c formed to project upward from the surface portion 65b of the base portion 65a so as to face each other, 65d. Further, in this case, the power transmission member 65 has a function of moving along the axial direction X of the lead screw portion 61c by the rotation of the lead screw portion 61c and transmitting power to the second extension portion 42e.
　なお、以下の説明では、第２の延長部４２ｅを挟んで対向する一対の壁部６５ｃ、６５ｄのうちリードスクリュー部６１ｃの末端部６１ｄ側に位置する対向壁を一方の壁部６５ｃとし、一対の壁部６５ｃ、６５ｄのうちリードスクリュー部６１ｃの先端部６１ｅ側に位置する対向壁を他方の壁部６５ｄとする。  In the following description, of the pair of wall portions 65c and 65d facing each other with the second extension portion 42e interposed therebetween, the facing wall located on the end portion 61d side of the lead screw portion 61c is defined as one wall portion 65c, and Of the wall portions 65c and 65d, the opposing wall located on the tip end 61e side of the lead screw portion 61c is referred to as the other wall portion 65d.
　ベース部６５ａには、ガイドシャフト６４を挿通させるための略円形の貫通孔形状からなる挿通部６５ｅと、ナット６３両側面である第１、第２側面６３ａ、６３ｂの所要部とそれぞれ当接（面接触）する一対の第１、第２の当接部６５ｆ、６５ｇとが形成されている（図６参照）。この場合、第１、第２の当接部６５ｆ、６５ｇは、ナット６３の第１、第２側面６３ａ、６３ｂを部分的にサンドイッチするようにベース部６５ａに一体形成される。 The base portion 65a is in contact with a required portion of the first and second side surfaces 63a and 63b, which are both side surfaces of the nut 63, and an insertion portion 65e having a substantially circular through hole shape for inserting the guide shaft 64, respectively ( A pair of first and second abutting portions 65f and 65g that are in surface contact) are formed (see FIG. 6). In this case, the first and second contact portions 65f and 65g are integrally formed with the base portion 65a so as to partially sandwich the first and second side surfaces 63a and 63b of the nut 63.
　なお、ナット６３において、第１のフランジ部６２ｂ側の面を第１側面６３ａとし、第２のフランジ部６２ｃ側の面を第２側面６３ｂとする。また、第１の当接部６５ｆと第１側面６３ａとが当接するとともに第２の当接部６５ｇと第２側面６３ｂとが当接して、第１、第２の当接部６５ｆ、６５ｇによりナット６３がサンドイッチされているものとする。 In the nut 63, the surface on the first flange portion 62b side is the first side surface 63a, and the surface on the second flange portion 62c side is the second side surface 63b. Further, the first contact portion 65f and the first side surface 63a are in contact with each other, the second contact portion 65g and the second side surface 63b are in contact with each other, and the first and second contact portions 65f and 65g It is assumed that the nut 63 is sandwiched.
　そして、一方の壁部６５ｃには一方の側面４２ｇ側（第２の延長部４２ｅ側）に向けて突出する略半球形状の突起部６５ｈが設けられ、他方の壁部６５ｄには他方の側面４２ｈ（第２の延長部４２ｅ）に後述する押圧力を作用させるための弾性部材としての金属製の板ばね６５ｉが設けられる（図７参照）。 The one wall portion 65c is provided with a substantially hemispherical protrusion 65h protruding toward the one side surface 42g side (the second extension portion 42e side), and the other wall portion 65d is provided with the other side surface 42h. A metal leaf spring 65i as an elastic member for applying a pressing force described later is provided on the (second extension 42e) (see FIG. 7).
　なお、詳細は後述するが、突起部６５ｈと板ばね６５ｉとの間に第２の延長部４２ｅが挿入されると、第２の延長部４２ｅと突起部６５ｈとは、突起部６５ｈの頂点部分である第１当接部分Ｔ１にて常に点接触する構成となる。なお、突起部６５ｈの形状は、一方の側面４２ｇと点接触可能な形状であればあらゆる形状を採用することができる。 Although the details will be described later, when the second extension 42e is inserted between the protrusion 65h and the leaf spring 65i, the second extension 42e and the protrusion 65h are the top portions of the protrusion 65h. The first contact portion T1 is always point-contacted. The projection 65h may have any shape as long as it can make point contact with the one side surface 42g.
　板ばね６５ｉは、例えば他方の壁部６５ｄの他方の側面４２ｈ側の面に取り付けられ、適宜固定手段を用いて他方の壁部６５ｄに密着するように固定される固定部Ｆ１と、この固定部Ｆ１の上端側から他方の側面４２ｈ側に向けて斜めに垂下するように延びる傾斜部Ｆ２と、この傾斜部Ｆ２の下端側から固定部Ｆ１側に向けて僅かに折り曲げられた屈曲先端部Ｆ３とを有する。 The leaf spring 65i is attached to, for example, the surface of the other wall portion 65d on the side surface 42h side of the other side, and is fixed to the other wall portion 65d by a suitable fixing means, and the fixing portion F1. An inclined portion F2 extending from the upper end side of F1 so as to obliquely hang toward the other side surface 42h, and a bent tip portion F3 slightly bent from the lower end side of the inclined portion F2 toward the fixed portion F1 side. Have.
　ここで、板ばね６５ｉが他方の壁部６５ｄに取り付けられた状況下において、第２の延長部４２ｅを板ばね６５ｉと突起部６５ｈとの間に挿入すると、板ばね６５ｉは、傾斜部Ｆ２と屈曲先端部Ｆ３とが若干、他方の壁部６５ｄ側に弾性変形した状態で、傾斜部Ｆ２と屈曲先端部Ｆ３との境界部分である第２当接部分Ｔ２にて第２の延長部４２ｅと当接する。 Here, in a situation where the leaf spring 65i is attached to the other wall portion 65d, when the second extension portion 42e is inserted between the leaf spring 65i and the protrusion portion 65h, the leaf spring 65i becomes the inclined portion F2. With the bending tip F3 slightly elastically deformed to the side of the other wall portion 65d, the second extension portion 42e is formed at the second contact portion T2 which is the boundary portion between the inclined portion F2 and the bending tip F3. Abut.
　すると、板ばね６５ｉには一方の壁部６５ｃ側に向けて押圧力（弾性復帰力）が作用することから、第２の延長部４２ｅが突起部６５ｈ側に常時、付勢され、第２の延長部４２ｅ（一方の側面４２ｇ）と突起部６５ｈとは常時、離れることはない。これに伴い、第２の延長部４２ｅと突起部６５ｈとは第１当接部分Ｔ１にて点接触し、結果的に第２の延長部４２ｅは突起部６５ｈと板ばね６５ｉとの間で常時、挟持されることになる。 Then, since the pressing force (elastic restoring force) acts on the leaf spring 65i toward the one wall portion 65c side, the second extension portion 42e is constantly urged toward the protrusion portion 65h side, and the second extension portion 42e is constantly biased. The extension portion 42e (one side surface 42g) and the protrusion portion 65h are not always separated from each other. Along with this, the second extension 42e and the projection 65h are in point contact with each other at the first contact portion T1, and as a result, the second extension 42e is always between the projection 65h and the leaf spring 65i. , Will be pinched.
　この際、第２の延長部４２ｅ（一方の側面４２ｇ）と突起部６５ｈとが当接する第１当接部分Ｔ１と、第２の延長部４２ｅ（他方の側面４２ｈ）と板ばね６５ｉとが当接する第２当接部分Ｔ２との位置関係に着目すると、本例の場合、第１当接部分Ｔ１と第２当接部分Ｔ２との双方がリードスクリュー部６１ｃの軸方向Ｘと平行に延びる仮想ライン（仮想水平ライン）７０上に位置していない構成を採用している。  At this time, the first contact portion T1 where the second extension 42e (the one side surface 42g) and the protrusion 65h contact each other, the second extension 42e (the other side surface 42h) and the leaf spring 65i contact each other. Focusing on the positional relationship with the contacting second contact portion T2, in the case of this example, both the first contact portion T1 and the second contact portion T2 are imaginary extending in parallel to the axial direction X of the lead screw portion 61c. The configuration not located on the line (virtual horizontal line) 70 is adopted.
　例えば、図７中、仮想ライン７０に第１の接点部分Ｔ１が位置している場合、第２当接部分Ｔ２は、仮想ライン７０には存在せず、仮想ライン７０の下側に位置している。つまり、このことは、一対の壁部６５ｃ、６５ｄの高さ方向（軸方向Ｘとは直交する方向）において、第１の当接部分Ｔ１と第２の当接部分Ｔ２とは同一の高さ位置に位置しておらず、第２の当接部分Ｔ２が第１の当接部分Ｔ１よりも下側に位置していることを意味する。 For example, in FIG. 7, when the first contact portion T1 is located on the virtual line 70, the second contact portion T2 does not exist on the virtual line 70 and is located below the virtual line 70. There is. That is, this means that the first contact portion T1 and the second contact portion T2 have the same height in the height direction of the pair of wall portions 65c and 65d (the direction orthogonal to the axial direction X). This means that the second contact portion T2 is not located at the position and the second contact portion T2 is located below the first contact portion T1.
　防振部材６６は、振動減衰機能を具備した軟質性の合成樹脂材料（例えばポリプロピレン樹脂）によって形成され、支持体６２における平板部６２ａに対応するように設けられる略矩形平板状の基部６６ａを備える。この防振部材６６は、ステッピングモータ６１ａの駆動時に生じる振動を、支持体６２からハウジング５０に至る際に減衰させる振動減衰機能を有している。 The anti-vibration member 66 is formed of a soft synthetic resin material (for example, polypropylene resin) having a vibration damping function, and includes a substantially rectangular flat plate-shaped base portion 66 a provided so as to correspond to the flat plate portion 62 a of the support body 62. .. The anti-vibration member 66 has a vibration damping function of attenuating the vibration generated when the stepping motor 61a is driven, from the support 62 to the housing 50.
　そして、防振部材６６における基部６６ａの４つの角部のうち、ハウジング５０の後述する第１のボス部に対応する位置に設けられる第１の角部Ｃ１には、第１の耳部６６ｂが、基部６６ａの板厚と略同一の板厚を有するように、基部６６ａの側方に突出形成されてなる。また、第１の角部Ｃ１と対角線方向であって、ハウジング５０の後述する第２のボス部に対応する位置に設けられる第２の角部Ｃ２には、第２の耳部６６ｃが、基部６６ａの板厚と略同一の板厚を有するように、基部６６ａの側方に突出形成されてなる。 Of the four corners of the base portion 66a of the vibration isolating member 66, the first corner portion C1 provided at a position corresponding to a first boss portion of the housing 50 described later has the first ear portion 66b. The base 66a is formed so as to project laterally so as to have a plate thickness substantially the same as the plate thickness of the base 66a. In addition, a second ear portion 66c is provided in the second corner portion C2 that is provided in a position that is diagonal to the first corner portion C1 and that corresponds to a second boss portion of the housing 50 described later. The base 66a is formed so as to project laterally so as to have a plate thickness substantially the same as the plate thickness of 66a.
　なお、６６ｄ、６６ｅは、支持体６２における第１、第２の螺合部６２ｇ、６２ｈと各々連通するように設けられ、ネジＳ１のネジ部を基部６６ａの背後側から貫通させるための貫通孔からなる第１、第２のネジ孔であり、この第１、第２のネジ孔６６ｄ、６６ｅは、基部６６ａの中央付近に位置しており、第１のネジ孔６６ｄが第１のフランジ部６２ｂ側に設けられ、第２のネジ孔６６ｅが第２のフランジ部６２ｃ側に設けられる。 Note that 66d and 66e are provided so as to communicate with the first and second screwing portions 62g and 62h of the support body 62, respectively, and are through holes for allowing the screw portion of the screw S1 to penetrate from the rear side of the base portion 66a. The first and second screw holes 66d and 66e are located near the center of the base 66a, and the first screw hole 66d is the first flange portion. The second screw hole 66e is provided on the 62b side, and the second screw hole 66e is provided on the second flange portion 62c side.
　そして、防振部材６６と支持体６２との固定は、図４に示すようにネジＳ１のネジ部を基部６６ａの背後側から第１、第２のネジ孔６６ｄ、６６ｅに各々貫通させ、各ネジ孔６６ｄ、６６ｅを貫通したネジＳ１のネジ部の所要部が第１、第２の螺合部６２ｇ、６２ｈにそれぞれ螺合されることで完了する。これにより支持体６２と防振部材６６とが第１の固定手段であるネジＳ１により固定される。 Then, as shown in FIG. 4, the vibration isolation member 66 and the support body 62 are fixed by inserting the screw portion of the screw S1 from the rear side of the base portion 66a into the first and second screw holes 66d and 66e, respectively. This is completed by screwing required parts of the screw part of the screw S1 penetrating the screw holes 66d and 66e into the first and second screwing parts 62g and 62h, respectively. As a result, the support body 62 and the vibration isolating member 66 are fixed by the screw S1 which is the first fixing means.
　なお、６６ｆは、前記第１のボス部に設けられる後述する第３のネジ螺合部と連通するように設けられ、ネジＳ２のネジ部を基部６６ａの表面側から貫通させるための貫通孔からなる第３のネジ孔であり、この第３のネジ孔６６ｆは、第１の耳部６６ｂの所定箇所に形成されてなる。 In addition, 66f is provided so as to communicate with a later-described third screw engagement portion provided in the first boss portion, and from a through hole for allowing the screw portion of the screw S2 to penetrate from the front surface side of the base portion 66a. The third screw hole 66f is formed at a predetermined position of the first ear portion 66b.
　同様に、６６ｇは、前記第２のボス部に設けられる後述する第４のネジ螺合部と連通するように設けられ、ネジＳ２のネジ部を基部６６ａの表面側から貫通させるための貫通孔からなる第４のネジ孔であり、この第４のネジ孔６６ｇは、第２の耳部６６ｃの所定箇所に形成されてなる。 Similarly, 66g is provided so as to communicate with a later-described fourth screw engagement portion provided in the second boss portion, and a through hole for allowing the screw portion of the screw S2 to penetrate from the surface side of the base portion 66a. And a fourth screw hole 66g is formed at a predetermined position of the second ear portion 66c.
　このように構成された位置調整手段４３は、ステッピングモータ６１ａからの前記回転駆動力を受けてリードスクリュー部６１ｃが回転駆動されると、リードスクリュー部６１ｃに噛合されたナット６３が軸方向Ｘに沿い往復移動する。そして、例えばナット６３が、第１のフランジ部６２ｂ側に移動している場合、ナット６３の第１側面６３ａには、これと面接触している第１の当接部６５ｆを第１のフランジ部６２ｂ側に移動させるような推力が作用する。 When the lead screw portion 61c is rotationally driven by receiving the rotational driving force from the stepping motor 61a, the position adjusting means 43 configured as described above causes the nut 63 meshed with the lead screw portion 61c to move in the axial direction X. Move back and forth along. Then, for example, when the nut 63 is moving to the first flange portion 62b side, the first side surface 63a of the nut 63 is provided with a first contact portion 65f that is in surface contact with the first side surface 63a. A thrust force that moves the portion 62b is applied.
　この推力の作用によって、動力伝達部材６５が、ガイドシャフト６４に案内された状態で、ナット６３の移動に同期して軸方向Ｘに沿い第１のフランジ部６２ｂ側に平行移動する。すると、この動力伝達部材６５の平行移動に伴い、突起部６５ｈと板ばね６５ｉとの間に介在している第２の延長部４２ｅには保持部材４２を回動させるような動力が伝達される。つまり、このことは、第２の延長部４２ｅへの動力伝達により、保持部材４２が回動軸線ＲＡを中心として図４における矢印方向に回動することを意味している。 By the action of this thrust, the power transmission member 65 is guided by the guide shaft 64, and in parallel with the movement of the nut 63, moves in parallel to the first flange portion 62b side along the axial direction X. Then, with the parallel movement of the power transmission member 65, the power for rotating the holding member 42 is transmitted to the second extension portion 42e interposed between the protrusion 65h and the leaf spring 65i. .. That is, this means that the power transmission to the second extension portion 42e causes the holding member 42 to rotate about the rotation axis RA in the arrow direction in FIG.
　なお、ナット６３が、第１のフランジ部６２ｂ側ではなく第２のフランジ部６２ｃ側に移動する場合は、動力伝達部材６５が、第２のフランジ部６２ｃ側に平行移動し、これにより第２の延長部４２ｅには、保持部材４２を回動軸線ＲＡを中心として図４における矢印方向とは反対方向に回動させるような動力が作用することは言うまでもない。 When the nut 63 moves to the second flange portion 62c side instead of the first flange portion 62b side, the power transmission member 65 moves in parallel to the second flange portion 62c side, and thereby the second flange portion 62c side moves. It goes without saying that power is applied to the extension portion 42e of the above so as to rotate the holding member 42 in the direction opposite to the arrow direction in FIG. 4 about the rotation axis RA.
　ハウジング５０は、例えばアルミダイカストにて形成され、ともに断面略凹部形状からなる上側ケース５１と下側ケース５２とを備え、上側ケース５１と下側ケース５２とで形成される内部空間である空間部５３において、液晶表示器２０（液晶表示素子２２）や第１反射器３０、並びに凹面鏡４１と保持部材４２と位置調整手段４３とから構成される第２反射器４０を収納するものである（図２参照）。 The housing 50 is formed of, for example, aluminum die casting, and includes an upper case 51 and a lower case 52, both of which are substantially recessed in cross section, and is a space portion which is an internal space formed by the upper case 51 and the lower case 52. In 53, the liquid crystal display 20 (liquid crystal display element 22), the first reflector 30, and the second reflector 40 including the concave mirror 41, the holding member 42, and the position adjusting means 43 are housed (FIG. 2).
　上側ケース体５１には、凹面鏡４１の配設位置の上部（車両１０のフロントガラス１３側）が開口する開口窓部５１ａが形成されており、この開口窓部５１ａには、開口窓部５１ａを塞ぐように透光部である透光性カバー５４が配設される。 The upper case body 51 is formed with an opening window portion 51a that opens at an upper portion (on the windshield 13 side of the vehicle 10) where the concave mirror 41 is disposed. The opening window portion 51a has an opening window portion 51a. A light-transmitting cover 54, which is a light-transmitting portion, is arranged so as to close it.
　透光性カバー５４は、透光性の合成樹脂材料によって形成され、凹面鏡４１で反射された表示光Ｌが透過（通過）する光透過性部材としての機能を有している。つまり、凹面鏡４１によって反射された表示光Ｌは、ハウジング５０に形成された透光性カバー５４を通じてフロントガラス１３に投影され、これにより表示像（虚像）Ｖの表示が行われることになる。 The translucent cover 54 is made of a translucent synthetic resin material and has a function as a translucent member that transmits (passes) the display light L reflected by the concave mirror 41. That is, the display light L reflected by the concave mirror 41 is projected on the windshield 13 through the translucent cover 54 formed in the housing 50, whereby the display image (virtual image) V is displayed.
　一方、下側ケース体５２における底部には、図４に示すように前記底部から防振部材６６側に向けて突出する略円筒状からなる一対の第１、第２のボス部５２ａ、５２ｂが設けられる。 On the other hand, at the bottom portion of the lower case body 52, as shown in FIG. 4, a pair of first and second boss portions 52a, 52b having a substantially cylindrical shape protruding from the bottom portion toward the vibration isolating member 66 side are provided. It is provided.
　このうち、第１のボス部５２ａは、ネジＳ２を螺合させるための第３のネジ螺合部５２ｃを備え、第３のネジ螺合部５２ｃは防振部材６６に設けられた第３のネジ孔６６ｆと連通している。他方、第２のボス部５２ｂは、ネジＳ２を螺合させるための第４のネジ螺合部５２ｄを備え、第４のネジ螺合部５２ｄは防振部材６６に設けられた第４のネジ孔６６ｇと連通している。 Of these, the first boss portion 52a includes a third screw screwing portion 52c for screwing the screw S2, and the third screw screwing portion 52c is the third screw screwing portion 52c. It communicates with the screw hole 66f. On the other hand, the second boss portion 52b includes a fourth screw screw portion 52d for screwing the screw S2, and the fourth screw screw portion 52d is the fourth screw screw provided on the vibration isolator 66. It communicates with the hole 66g.
　そして、ハウジング５０（各ボス部５２ａ、５２ｂ）と防振部材６６との固定は、ネジＳ２のネジ部を基部６６ａの表面側から第３、第４のネジ孔６６ｆ、６６ｇに各々貫通させ、各ネジ孔６６ｆ、６６ｇを貫通してなるネジＳ２のネジ部の所要部が、各ボス部５２ａ、５２ｂに備えられる第３、第４のネジ螺合部５２ｃ、５２ｄにそれぞれ螺合されることで完了する。これによりハウジング５０（各ボス部５２ａ、５２ｂ）と防振部材６６とが第２の固定手段であるネジＳ２により固定される。 Then, the housing 50 (the boss portions 52a and 52b) and the vibration isolating member 66 are fixed by inserting the screw portion of the screw S2 from the front surface side of the base portion 66a into the third and fourth screw holes 66f and 66g, respectively. Required parts of the screw part of the screw S2 penetrating the screw holes 66f and 66g are screwed into the third and fourth screw screw parts 52c and 52d provided in the boss parts 52a and 52b, respectively. Complete with. As a result, the housing 50 (each boss portion 52a, 52b) and the vibration isolating member 66 are fixed by the screw S2 which is the second fixing means.
　以上のように本実施形態では、動力伝達部材６５の一方の壁部６５ｃには第２の延長部４２ｅ側に向けて突出する突起部６５ｈが設けられ、動力伝達部材６５の他方の壁部６５ｄには板ばね６５ｉが設けられ、突起部６５ｈと第２の延長部４２ｅとが当接する第１当接部分Ｔ１と、板ばね６５ｉと第２の延長部４２ｅとが当接する第２当接部分Ｔ２との双方が、リードスクリュー部６１ｃの軸方向Ｘと平行に延びる仮想ライン７０上に位置していない構成となっている。 As described above, in the present embodiment, the one wall portion 65c of the power transmission member 65 is provided with the protrusion 65h protruding toward the second extension portion 42e side, and the other wall portion 65d of the power transmission member 65 is provided. Is provided with a leaf spring 65i, and a first contact portion T1 with which the protrusion 65h and the second extension portion 42e abut, and a second contact portion with which the leaf spring 65i and the second extension portion 42e abut. Both T2 and T2 are not located on a virtual line 70 extending parallel to the axial direction X of the lead screw portion 61c.
　従って、板ばね６５ｉ（前記弾性復帰力）によって第２の延長部４２ｅが一方の壁部６５ｃ側に押圧されたとき、第２の延長部４２ｅ（突出片４２ｃ）と突起部６５ｈとは常時、当接して離れることはない。これにより突起部と突出片との間に従来、形成されていた前記微少なクリアランスの発生が抑制され、突起部６５ｈと板ばね６５ｉとの間に挟持される第２の延長部４２ｅの固定信頼性を高めることができ、第２の延長部４２ｅによる保持部材４２への動力伝達時に保持部材４２ががたつかず、フロントガラス１３越しに利用者１４が視認する表示像Ｖの像ぶれが発生する虞はなくなる。 Therefore, when the second extension portion 42e is pressed toward the one wall portion 65c by the leaf spring 65i (the elastic return force), the second extension portion 42e (the protruding piece 42c) and the protrusion portion 65h are always It does not come in contact with and separate from each other. As a result, the generation of the minute clearance that has been conventionally formed between the protrusion and the protrusion is suppressed, and the fixing reliability of the second extension 42e sandwiched between the protrusion 65h and the leaf spring 65i is secured. The holding member 42 does not rattle when power is transmitted to the holding member 42 by the second extension 42e, and image blurring of the display image V visually recognized by the user 14 occurs through the windshield 13. There is no fear.
　なお、本発明は、上述の実施形態及び図面によって限定されるものではない。本発明の要旨を変更しない範囲で、適宜、実施形態及び図面に変更（構成要素の削除も含む）を加えることが可能である。 The present invention is not limited to the above embodiment and drawings. Modifications (including deletion of components) can be appropriately added to the embodiments and the drawings without departing from the spirit of the present invention.
　例えば、上述した実施形態では、一対の壁部６５ｃ、６５ｄの前記高さ方向において、第２の当接部分Ｔ２が第１の当接部分Ｔ１よりも下側に位置していたが、第１当接部分Ｔ１と第２当接部分Ｔ２とは前記高さ方向にて同一の高さ位置に設けられていない構成となっていればよいものであり、例えば本実施形態の変形例として図８に示すように前記高さ方向にて第２の当接部分Ｔ２を第１の当接部分Ｔ１よりも上側に位置させてもよいことは言うまでもない。 For example, in the above-described embodiment, the second contact portion T2 is located below the first contact portion T1 in the height direction of the pair of wall portions 65c and 65d. It suffices that the contact portion T1 and the second contact portion T2 are not provided at the same height position in the height direction, and for example, as a modified example of this embodiment, FIG. It goes without saying that the second contact portion T2 may be located above the first contact portion T1 in the height direction as shown in FIG.
　３０　　第１反射器 
　４０　　第２反射器 
　４１　　凹面鏡（反射部材） 
　４２　　保持部材 
　４２ｃ　突出片 
　４２ｄ　第１の延長部 
　４２ｅ　第２の延長部（被動力伝達部） 
　４２ｇ　一方の側面（一方の面） 
　４２ｈ　他方の側面（他方の面） 
　４３　　位置調整手段 
　６１　　駆動手段 
　６１ａ　ステッピングモータ（駆動部材） 
　６１ｃ　リードスクリュー部 
　６２　　支持体 
　６３　　ナット 
　６４　　ガイドシャフト 
　６５　　動力伝達部 
　６５ａ　基部 
　６５ｃ　一方の壁部 
　６５ｄ　他方の壁部 
　６５ｈ　突起部 
　６５ｉ　板ばね（弾性部材） 
　６６　　防振部材 
　７０　　仮想ライン（仮想水平ライン） 
　　Ｌ　　表示光 
　ＲＡ　　回動軸線 
　Ｔ１　　第１当接部分 
　Ｔ２　　第２当接部分 
　　Ｘ　　軸方向  30 First reflector
40 Second reflector
41 concave mirror (reflection member)
42 Holding member
42c protruding piece
42d first extension
42e Second extension portion (power-transmitted portion)
42g One side (one side)
42h The other side surface (the other surface)
43 Position adjusting means
61 Drive means
61a Stepping motor (driving member)
61c Lead screw part
62 support
63 nuts
64 guide shaft
65 Power transmission part
65a base
65c One wall
65d The other wall
65h protrusion
65i leaf spring (elastic member)
66 Anti-vibration member
70 virtual lines (virtual horizontal lines)
L display light
RA rotation axis
T1 first contact part
T2 Second contact part
X-axis direction

Claims (1)

  1. 駆動部材の駆動に伴い回転駆動されるリードスクリュー部と、 
    前記リードスクリュー部の回転により前記リードスクリュー部の軸方向に沿い移動し、被動力伝達部に動力を伝達する動力伝達部材とを備えた動力伝達装置において、 
    前記動力伝達部材は、前記被動力伝達部を挟んで対向する一対の壁部を有し、 
    前記一対の壁部のうち一方の壁部には前記被動力伝達部側に向けて突出する突起部が設けられ、 
    前記一対の壁部のうち他方の壁部には弾性部材が設けられ、 
    前記突起部と前記被動力伝達部とが当接する第１当接部分と、前記弾性部材と前記被動力伝達部とが当接する第２当接部分との双方が、前記軸方向と平行に延びる仮想ライン上に位置していないことを特徴とする動力伝達装置。     A lead screw portion that is rotationally driven according to the driving of the driving member,
    In a power transmission device including a power transmission member that moves along the axial direction of the lead screw portion by rotation of the lead screw portion and that transmits power to the power transmission portion,
    The power transmission member has a pair of wall portions facing each other with the power transmission portion interposed therebetween,
    One wall portion of the pair of wall portions is provided with a protrusion portion protruding toward the power-transmitted portion side.
    An elastic member is provided on the other wall portion of the pair of wall portions,
    Both a first contact portion where the protrusion and the power transmitting portion contact and a second contact portion where the elastic member contacts the power transmitting portion extend parallel to the axial direction. A power transmission device characterized in that it is not located on a virtual line.
PCT/JP2019/040607 2018-10-29 2019-10-16 Power transmission device WO2020090463A1 (en)

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