JP2017177880A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device which can suppress breakage of a power transmission member.SOLUTION: A display device comprises: a combiner 40 which displays an image in such a manner that display light L is projected from a display 20; a holding member 50 which holds the combiner 40 and is rotated around a rotation axis A together with the combiner 40; an arm part 53 which is connected to the holding member 50; a drive mechanism 60 which serves as a driving source for rotating the holding member 50; and a power transmission member 70 which transmits a driving force from the drive mechanism 60 to the arm part 53 thereby rotating the holding member 50 around the rotation axis A together with the combiner 40. The power transmission member 70 has an elastic body which holds the arm part 53 while energizing the arm part 53 from both sides.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a display device.

  As a head-up display device that is mounted on a vehicle and displays various information as virtual images to a driver, one disclosed in Patent Document 1 is known. This head-up display device is called a windshield type head-up display embedded in an instrument panel of a vehicle, a liquid crystal display that emits display light, a concave mirror that reflects display light, A holding member for holding the concave mirror and a position adjusting means for adjusting the angular position of the holding member are provided.

  The position adjusting means is connected to a lead screw portion that is rotationally driven by the driving means, a nut that is screwed to the lead screw portion and moves in the axial direction by the rotation of the lead screw portion, and a nut and a holding member. And a power transmission member for transmitting the power from the power to the holding member.

JP 2009-73461 A

  Here, it is assumed that the windshield type head-up display device described in Patent Document 1 is replaced with a combiner-type head-up display device. That is, a case is assumed where the concave mirror described in Patent Document 1 is replaced with a combiner (which pops out above the instrument panel). In such a configuration, when the combiner is intentionally moved by the user's hand, an external force (load) acting on the combiner is connected to the holding member that holds the combiner, the power transmission member that is connected to the holding member, and the power transmission member. By sequentially acting on the nut, there is a possibility that the connecting portion of the power transmission member with the nut may be damaged.

  This invention is made | formed in view of the said actual condition, and it aims at providing the display apparatus which can suppress damage to a power transmission member.

In order to achieve the above object, the display device of the present invention provides:
A combiner that displays an image by projecting display light from the display;
A holding member that holds the combiner and rotates with the combiner about a rotation axis;
An arm connected to the holding member;
A drive mechanism serving as a drive source for the operation of rotating the holding member;
A power transmission member configured to transmit the driving force from the driving mechanism to the arm portion to rotate the holding member together with the combiner about the rotation shaft;
The power transmission member includes an elastic body that holds the arm while urging the arm from both sides.

  According to the present invention, damage to the power transmission member can be suppressed.

It is sectional drawing which shows the display apparatus which concerns on one embodiment of this invention. It is a perspective view which shows a part of combiner and the internal structure of a housing | casing which concern on embodiment. It is a perspective view which shows the holding member which concerns on embodiment, a power transmission member, and a drive means. It is a perspective view which shows the holding member which concerns on embodiment, a power transmission member, and a drive means. It is a perspective view which shows the power transmission member and drive means which concern on embodiment. It is a perspective view which shows the state which removed the power transmission member which concerns on embodiment, and the support body of a drive means. It is a perspective view which shows the support body which concerns on embodiment. It is a perspective view which shows the power transmission member and drive means which concern on embodiment. It is a top view which shows the power transmission member and drive means which concern on embodiment. It is a perspective view which shows the power transmission member and drive means which concern on embodiment. It is a side view which shows the power transmission member and drive means which concern on embodiment.

  Hereinafter, a display device according to an embodiment of the present invention will be described with reference to the drawings.

The display device 1 is a so-called head-up display device, and is mounted on a dashboard of an automobile in order to display a vehicle speed, a travel distance, and the like in a driver's field of view. As shown in FIGS. 1 and 2, the display device 1 includes a housing 10, a display 20 that emits display light indicating various types of information, and a reflecting mirror 30 that reflects display light emitted from the display 20. , A combiner 40 that displays the display light reflected by the reflecting mirror 30 as an image to the driver, a holding member 50 that holds the combiner 40, a drive mechanism 60 that is a drive source for the operation of rotating the holding member 50, and driving And a power transmission member 70 that transmits the driving force from the mechanism 60 to the holding member 50.
The direction in which the concave surface of the combiner 40 faces the driver is the Z-axis direction, the horizontal direction perpendicular to the Z-axis direction is the X-axis direction, and the vertical direction perpendicular to the Z-axis direction and the X-axis direction is the Y-direction. Set the XYZ coordinates to be referred to as appropriate. In addition, the direction indicated by the arrow of the coordinate axis is the + (plus) direction, and the opposite direction is the-(minus) direction.

  The housing 10 is made of a synthetic resin material, and is formed by combining an upper housing 11, a middle housing 12, and a lower housing 13 as shown in FIG. The upper housing 11 has an emission port 11 a for emitting display light L, which will be described later, and a projection port 11 b for projecting the combiner 40 from the inside of the housing 10. A display device 20 is housed inside the middle housing 12.

  By combining the upper housing 11, the middle housing 12 and the lower housing 13, the housing 10 has a box shape and protects the display device 1 from foreign matters such as dust.

  As shown in FIG. 2, the display device 20 is a device that emits display light L from the emission surface 21, and includes a transmissive liquid crystal panel having a TFT substrate and a light source that is a backlight thereof. The display 20 emits the display light L from the emission surface 21 toward the reflecting mirror 30.

  The reflecting mirror 30 is disposed inside the upper housing 11 and the middle housing 12. The reflecting mirror 30 is a rectangular mirror having a reflecting surface on the surface facing the display device 20, and reflects the display light L emitted from the display device 20 toward the combiner 40. The reflecting mirror 30 is held by a mirror holder (not shown) provided on the inner wall of the housing 10.

  The combiner 40 is made of a polycarbonate resin having a transmittance of about 25%, and is formed in a plate shape having a concave surface 41. The concave surface 41 has a function of causing the driver to visually recognize the display light L as a virtual image while expanding the display light L reflected by the reflecting mirror 30.

  The holding member 50 is made of a synthetic resin material, and includes a main body portion 51, a support shaft 52, and an arm portion 53. The main body 51 is a member that holds the combiner 40. As shown in FIG. 1, the main body 51 has a holding part 511 that holds and holds the lower end part (the end part in the −Y direction) of the combiner 40. The clamping part 511 is holding the combiner 40 by clamping the lower end part of the combiner 40 from + Z direction and -Z direction.

  The support shaft 52 is a member that serves as a rotation shaft of the holding member 50. As shown in FIGS. 2 and 3, the support shaft 52 is formed in a columnar shape, and is formed so as to protrude from both ends of the main body 51 in the X-axis direction in the X-axis direction. The support shaft 52 is inserted into a guide groove (not shown) of the middle housing 12 so as to be rotatable about a rotation axis A that is the center axis of the support shaft 52. By rotating the holding member 50 around the rotation axis A, the angle of the combiner 40 held by the holding member 50 can be adjusted.

  The arm portion 53 is a member formed to extend downward (−Y direction) from the vicinity of the end portion of the main body portion 51 in the + X direction. As shown in FIGS. 3 and 4, a hanging member 531 is formed at the lower end portion of the arm portion 53.

  A first recess 531a into which a later-described protrusion 764 and a second recess 531b into which a protrusion 774 is fitted are formed on both surfaces of the hanging member 531 in the Z-axis direction.

  As shown in FIGS. 5 and 6, the drive mechanism 60 includes a drive unit 61, a support body 62, a nut 63, and a guide shaft 64.

  The drive unit 61 is composed of a stepping motor or the like, and functions as a drive source / power source for the operation of rotating the holding member 50 about the rotation axis A. A lead screw portion 611 that is a spiral groove is formed on the peripheral surface of the output rotation shaft of the stepping motor. The lead screw portion 611 is formed in an elongated cylindrical shape, and its longitudinal direction is the Z-axis direction. A driving signal is supplied to the stepping motor via a lead wire (not shown). The lead screw 611 rotates by supplying the drive signal.

  The support body 62 fixes the drive part 61 inside the housing | casing 10, and is formed with the metal material. As shown in FIG. 7, the support body 62 is bent so that a substantially plate-like flat plate portion 621 formed along the Z-axis direction and both end portions of the flat plate portion 621 in the Z-axis direction face each other. The first side plate portion 622 and the second side plate portion 623 formed in this manner, and the lid portion 624 extending in a bowl shape from the upper end portion of the flat plate portion 621.

  The first side plate portion 622 is formed with a first through hole 622a through which the lead screw portion 611 passes and a first hole portion 622b into which an end portion of the guide shaft 64 is inserted. Further, a stepping motor is fixed to the first side plate portion 622 by an arbitrary attachment means.

  The second side plate 623 is formed with a second through hole 623a and a second hole 623b into which the end of the guide shaft 64 is inserted. The second through-hole 623a and the second hole 623b are formed to face the first through-hole 622a and the first hole 622b, respectively. A bearing member B is mounted in the second through hole 623a. An end portion in the −Z direction of the lead screw portion 611 is rotatably supported by the bearing member B.

  The nut 63 shown in FIG. 6 is a member that moves the power transmission member 70 in the axial direction (Z-axis direction) of the lead screw portion 611. The nut 63 is screwed into the lead screw portion 611 and moves in the axial direction of the lead screw portion 611 according to the rotation of the lead screw portion 611. Further, the nut 63 is sandwiched between the sandwiching portions 712 of the power transmission member 70.

  The guide shaft 64 is made of a metal material formed in an elongated cylindrical shape, and is a member for holding the power transmission member 70. The guide shaft 64 is disposed so that its longitudinal direction is parallel to the longitudinal direction of the lead screw portion 611. As shown in FIG. 5, the guide shaft 64 passes through a first hole 622b and a through hole 711 described later of the power transmission member 70, and one end of the guide shaft 64 is inserted into the second hole 623b.

  The power transmission member 70 is a member that holds the holding member 50 and transmits the driving force from the drive unit 61 to the holding member 50. As shown in FIG. 6, the power transmission member 70 connects the base portion 71 that holds the nut 63 of the drive mechanism 60, the flat plate-like base portion 72 that extends in the Z-axis direction, and the base portion 71 and the base portion 72. The first fixing plate 74 and the second fixing plate 75 formed so as to be opposed to each other from both ends of the base portion 72 in the Z-axis direction, and the first contact abutting on the hanging member 531 of the arm portion 53. A contact plate 76, a second contact plate 77, a first spring 78, a second spring 79, a first guide shaft 80, and a second guide shaft 81 are provided.

  The base portion 71 is made of a synthetic resin material and includes a through hole 711 that allows the guide shaft 64 to pass therethrough and a clamping portion 712 that clamps the nut 63. As shown in FIGS. 6 and 8, the sandwiching portion 712 is formed in a shape that matches the shape of the nut 63 in the circumferential direction.

  The first fixing plate 74 is formed of a synthetic resin material, and is a member that holds the first spring 78, the first guide shaft 80, and the second guide shaft 81. As shown in FIG. 9, the first fixing plate 74 is provided with fitting holes 741 and 742 into which the first guide shaft 80 and the second guide shaft 81 are inserted, respectively. The fitting holes 741 and 742 are provided so as to open in the Z-axis direction. In addition, a substantially cylindrical protrusion 743 is provided on the surface of the first fixed plate 74 facing the first contact plate 76. The protrusion 743 is fitted into the first spring 78.

  The second fixing plate 75 is made of a synthetic resin material and is a member that holds the second spring 79, the first guide shaft 80, and the second guide shaft 81. The second fixing plate 75 is provided with fitting holes 751 and 752 into which the first guide shaft 80 and the second guide shaft 81 are inserted, respectively. The fitting holes 751 and 752 are provided to open in the Z-axis direction, and are formed to face the fitting holes 741 and 742 provided in the first fixing plate 74, respectively. A substantially cylindrical protrusion 753 is provided on the surface of the second fixed plate 75 that faces the second contact plate 77. The protrusion 753 is fitted into the second spring 79.

  The first contact plate 76 is made of a synthetic resin material, and is a member that contacts the surface on the + Z-axis side of the hanging member 531. As shown in FIGS. 6, 10, and 11, the first contact plate 76 includes a through hole 761 through which the first guide shaft 80 as a shaft passes and a through hole through which the second guide shaft 81 as a shaft passes. 762 is provided. Further, the first contact plate 76 is provided with a projection 763 having a substantially cylindrical shape and a projection 764 having a substantially hemispherical shape on two surfaces where the through hole 761 and the through hole 762 are formed, respectively. Yes.

  As shown in FIGS. 10 and 11, a first spring (first elastic body) 78 as an elastic body is fitted into the protrusion 763. Further, as shown in FIG. 4, the protrusion 764 which is the first protrusion is fitted into the first recess 531 a of the hanging member 531. The vicinity of the upper end portion of the first contact plate 76 is formed to be inclined in the direction in which the first fixed plate 74 exists.

  The second contact plate 77 is made of a synthetic resin material and is a member that contacts the surface on the −Z-axis side of the hanging member 531. As shown in FIGS. 6, 10 and 11, the second contact plate 77 is provided with a through hole 771 through which the first guide shaft 80 passes and a through hole 772 through which the second guide shaft 81 passes. Yes. Further, the second contact plate 77 is provided with a projection portion 773 having a substantially cylindrical shape and a projection portion 774 having a substantially hemispherical shape on two surfaces where the through hole 771 and the through hole 772 are formed, respectively. Yes.

  As shown in FIGS. 6 and 11, a second spring (second elastic body) 79 as an elastic body is fitted into the protrusion 773. Further, as shown in FIG. 4, the protrusion 774 that is the second protrusion is fitted into the second recess 531 b of the hanging member 531. The vicinity of the upper end portion of the second contact plate 77 is formed to be inclined in the direction in which the second fixed plate 75 exists.

  The first contact plate 76 and the second contact plate 77 are arranged so as to sandwich the hanging member 531 from both directions in the Z-axis direction.

  The first spring 78 is a coil spring, and is formed of metal or resin. As shown in FIG. 11, one end is fitted into the protrusion 743 of the first fixing plate 74, and the other end is the first contact plate. The protrusion 76 is inserted into the protrusion 763.

  The second spring 79 is a coil spring, and is formed of metal or resin. One end of the second spring 79 is fitted into the projection 753 of the second fixing plate 75 and the other end is fitted into the projection 773 of the second contact plate 77. It is inserted.

  The first spring 78 biases the drooping member 531 in the −Z direction via the first contact plate 76. Further, the second spring 79 biases the drooping member 531 in the + Z direction via the second contact plate 77. That is, the drooping member 531 is urged by the first spring 78 and the second spring 79 from the opposite directions (that is, both sides). The drooping member 531 is held by the first spring 78 and the second spring 79 by being urged by the first spring 78 and the second spring 79 from opposite directions.

  The first guide shaft 80 and the second guide shaft 81 are elongated cylindrical members formed of a metal material. The first guide shaft 80 and the second guide shaft 81 connect between the first fixed plate 74 and the second fixed plate 75, respectively.

The first guide shaft 80 and the second guide shaft 81 pass through the through hole 761 and the through hole 762 of the first contact plate 76, respectively. Thereby, the first contact plate 76 slides on the outer peripheral surfaces of the first guide shaft 80 and the second guide shaft 81.
Similarly, the first guide shaft 80 and the second guide shaft 81 pass through the through hole 771 and the through hole 772 of the second contact plate 77, respectively. Thereby, the second contact plate 77 slides on the outer peripheral surfaces of the first guide shaft 80 and the second guide shaft 81.

  In the display device 1 having such a configuration, when a drive signal is supplied to the stepping motor, the output rotation shaft of the stepping motor rotates. And with rotation of an output rotating shaft, the lead screw part 611 formed in the surrounding surface of an output rotating shaft rotates. As the lead screw portion 611 rotates, the nut 63 that meshes with the lead screw portion 611 moves in the axial direction. For example, when the nut 63 moves in the −Z-axis direction, the power transmission member 70 also moves in the −Z-axis direction because the clamping portion 712 of the power transmission member 70 holds the nut 63. As the power transmission member 70 moves in the −Z-axis direction, the drooping member 531 held by the first spring 78 and the second spring 79 of the power transmission member 70 also moves in the −Z-axis direction. As the drooping member 531 moves in the −Z-axis direction, the main body 51 of the holding member 50 rotates about the rotation axis A of the support shaft 52 that is rotatably supported by the housing 10. As the main body 51 rotates, the combiner 40 held by the main body 51 also rotates. Thereby, the angle of the combiner 40 can be adjusted.

And according to the said structure, even if a load is applied to the holding member 50 by a user deliberately moving the combiner 40 by hand, the hanging member 531 of the holding member 50 is attached to the first spring 78 or the first spring 79. Since it moves in the direction of the first spring 78 or the second spring 79 against the force, the load applied to the holding member 50 by the movement can be released.
For example, when the user intentionally moves the combiner 40 with a hand and a load is applied to rotate the holding member 50 in the + Z-axis direction, the hanging member 531 resists the biasing force of the first spring 78 in the + Z-axis direction. Moving. This movement releases the load applied to the holding member 50.

  Thereby, since the load (external force) transmitted (acting) from the holding member 50 to the power transmission member 70 is reduced, it is possible to reduce the load applied to the connecting portion of the clamping portion 712 (power transmission member 70) with the nut 63, Damage to the power transmission member 70 can be suppressed.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation and application are possible.

For example, although the drive unit 61 is a stepping motor, the motor to be used is not particularly limited, such as a DC motor or a DC brushless motor, in addition to the stepping motor.
In addition, the first spring 78 and the second spring 79 give an elastic force to the hanging member 531. However, any elastic body such as rubber can be used to give the elastic force.

Further, although the protrusion 743 and the protrusion 763 that are fitted into the first spring 78 are provided, the first spring is supported by the first fixing plate 74 and the first contact plate 76 without the protrusion 743 and the protrusion 763. As long as 78 can be held, the protrusion 743 and the protrusion 763 are unnecessary.
Similarly, the protrusion 753 and the protrusion 773 that are inserted into the second spring 79 are provided. Even if the protrusion 753 and the protrusion 773 are not provided, the second fixing plate 75 and the second abutment plate 77 can be used for the second. If the spring 79 can be held, the protrusion 753 and the protrusion 773 are unnecessary.

  The first spring 78 and the second spring 79 are coil springs, but may be other springs such as a leaf spring.

In addition, the guide shafts 80 and 81 are used to hold the first contact plate 76 and the second contact plate 77, but the first contact plate is formed by the first spring 78, the second spring 79, and the hanging member 531. If the shaft 76 and the second contact plate 77 can be held, the guide shafts 80 and 81 are unnecessary.
Further, although two guide shafts (the shafts) are used as the constituent elements of the display device 1, the number of guide shafts can be used as long as the function of holding the first contact plate 76 and the second contact plate 77 can be exhibited. May be one or more than three.

Further, the display device 20 is composed of a transmissive liquid crystal panel having a TFT substrate and a light source as a backlight thereof, but may be an organic EL, and the configuration thereof is arbitrary.
Furthermore, although the combiner 40 is made of polycarbonate resin, it may be made of a half mirror or the like as long as the display light can be displayed to the driver as an image.

In addition, the projection 764 of the first contact plate 76 and the projection 774 of the second contact 77 are brought into contact with the hanging member 531, but the first contact plate 76 and the projection without the projection 764 are present. The second abutment portion 77 where the 774 does not exist may abut on the hanging member 531.
Further, the power transmission member 70 is moved in the axial direction along with the rotation of the lead screw portion 611. However, the structure is arbitrary as long as the power transmission member 70 can be moved in the axial direction.

  Moreover, although the holding member 50 hold | maintained the combiner 40 by pinching the lower end part of the combiner 40, if the combiner 40 can be hold | maintained, the structure is arbitrary.

DESCRIPTION OF SYMBOLS 1 Display apparatus 10 Housing | casing 11 Upper housing | casing 11a Output port 11b Protrusion port 12 Middle housing 13 Lower housing 20 Display device 21 Output surface 30 Reflector 40 Combiner 41 Concave surface 50 Holding member 51 Main body portion 52 Support shaft 53 Arm portion 60 Drive mechanism 61 Drive part 62 Support body 63 Nut 64 Guide shaft 70 Power transmission member 71 Base part 72 Base part 73 Connection part 74 First fixed plate 75 Second fixed plate 76 First contact plate 77 Second contact plate 78 First Spring 79 Second spring 80 First guide shaft 81 Second guide shaft 511 Nipping portion 531 Hanging member 531a First recess 531b Second recess 611 Lead screw portion 621 Flat plate portion 622 First side plate portion 622a First through hole 622b First hole Part 623 second side plate part 623a second through hole 623b second hole part 624 lid part 711 761,762,771,772 through hole 712 clamping portions 741,742,751,752 fitting hole 743,753,763,764,773,774 projections A rotary shaft B bearing member L display light

Claims (4)

A combiner that displays an image by projecting display light from the display;
A holding member that holds the combiner and rotates with the combiner about a rotation axis;
An arm connected to the holding member;
A drive mechanism serving as a drive source for the operation of rotating the holding member;
A power transmission member configured to transmit the driving force from the driving mechanism to the arm portion to rotate the holding member together with the combiner about the rotation shaft;
The power transmission member includes an elastic body that holds the arm portion while urging the arm portion from both sides.
A display device characterized by that. The power transmission member is located between a base, a first fixing plate and a second fixing plate formed to face each other at both ends of the base, and the arm and the first fixing plate and the second fixing plate. A first contact plate and a second contact plate that sandwich the portion,
The elastic bodies are a first elastic body and a second elastic body,
The first elastic body is disposed between the first fixed plate and the first contact plate,
The second elastic body is disposed between the second fixed plate and the second contact plate.
The display device according to claim 1. The power transmission member further includes a shaft that connects between the first fixed plate and the second fixed plate, and on which the first contact plate and the second contact plate slide.
The display device according to claim 2. The first contact plate and the second contact plate have a first protrusion and a second protrusion, respectively.
On both sides of the arm portion, a first recess for fitting the first projection and a second recess for fitting the second projection are formed, respectively.
The display device according to claim 2, wherein the display device is a display device.

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