WO2018008313A1

WO2018008313A1 - Head-up display

Info

Publication number: WO2018008313A1
Application number: PCT/JP2017/020763
Authority: WO
Inventors: 高徳大川; 修小平; 裕之畑迫; 孝文春日
Original assignee: 日本電産サンキョー株式会社
Priority date: 2016-07-06
Filing date: 2017-06-05
Publication date: 2018-01-11
Also published as: JP2018002050A

Abstract

Provided is a pop-up retractable head-up display (HUD) which has a simple structure capable of supporting multiple types of movement of a combiner, thereby allowing compact overall layout. More specifically, the interior of a case body 1a is equipped with: a frame 2 which has a plurality of guide shafts 3 arranged between an upper flange 2b and a lower flange 2c; a lead screw 5 which is rotatably supported parallel to the guide shafts 3 by the frame 2; a unit case 4 which is provided so as to be vertically movable along the guide shafts of the frame 2 and which has a nut 9 fixed thereto, the nut 9 being screwably engaged with the lead screw 5; a first motor 6 which rotationally drives the lead screw 5; a turning shaft 10 which is disposed in the horizontal direction within the unit case 4 and supported turnably about the axis; a combiner 13 which is integrated with the outer periphery of the turning shaft 10 and disposed with the plate surface thereof aligned with the vertical direction; and a second motor 16 which is provided within the unit case 4 so as to turn the turning shaft 10 by means of a turning mechanism.

Description

Head-up display

The present invention relates to a head-up display that is incorporated in a dashboard of a car or the like and displays an image on a combiner, and particularly relates to a pop-up storage type head-up display that drives a combiner up and down and stores it in a case body. .

2. Description of the Related Art In recent years, a head-up display (hereinafter abbreviated as HUD) that reflects an image on a concave plate-shaped combiner front and displays driving information in a driver's field of view has been adopted in various vehicles such as passenger cars. ing.

6 and 7 show a rotary storage type HUD in which a combiner is rotated and stored in the case main body 20 among HUDs having a conventional combiner mounted in a dashboard of a car. A concave plate-shaped combiner 21 and a projection unit 22 for projecting an image toward the combiner 21 are incorporated in the case body 20 having an opening on the upper surface. .

Here, the combiner 21 is integrally provided with a rotation shaft 23 along one side thereof, and is located at a position where the case body 20 is closed by the rotation shaft 23 and a position where the case body 20 stands from the upper surface. It is provided so as to be freely rotatable.

A helical gear 24 is provided at one end of the rotating shaft 23, and a worm gear 26 provided on the output shaft of the stepping motor 25 is screwed to the helical gear 24. A spiral spring 27 is provided at the other end of the rotating shaft 23 to urge the rotating shaft 23 around the axis in a direction in which the combiner 21 closes the opening.

As a result, the combiner HUD projects the image from the projection unit 22 by raising the combiner 21 by the stepping motor 25 during use, and stores the image in the opening of the case body 20 by the urging force of the spiral spring 27 after use. It has become. The configuration of the HUD incorporated in such a dashboard is also disclosed in, for example, Patent Document 1 below.

JP-A-11-091403

On the other hand, in addition to the rotary storage type HUD in which the combiner 21 having the above-described configuration is rotated and stored in the case body 20, the pop-up storage in which the combiner 30 is driven up and down and stored in the case body 31 as shown in FIG. A type of HUD has also been developed.

In such a pop-up storage type HUD, when the image is projected from the projection unit in the case body 31 after the combiner 30 is driven up and down, the image is received by rotating the combiner 30 around the lower end. It is necessary to adjust the angle (tilt adjustment).

For this reason, if a plurality of driving operations for the combiner 30 are performed by a single stepping motor such as the rotary storage type HUD shown in FIGS. 6 and 7, the structure becomes extremely complicated and the size of the apparatus becomes large. There was also a problem of inviting it.

The present invention has been made in view of the above circumstances, and provides a pop-up storage type HUD that can handle a plurality of types of drive of a combiner with a simple structure, and thus can achieve a compact overall arrangement. It is an object to do.

In order to solve the above problems, a head-up display according to the present invention has a plurality of guide shafts arranged in parallel between an upper flange and a lower flange in a case body in which an opening is formed in a top plate. A frame, a lead screw disposed parallel to the guide shaft and rotatably supported on the frame, and a lead screw that is vertically movable along the guide shaft of the frame. A unit case in which a nut to be screwed is fixed, a first motor that rotationally drives the lead screw, and a rotation shaft that is disposed in the unit case in a horizontal direction and is rotatably supported around an axis. And a combiner in which the lower end is integrated with the outer periphery of the rotating shaft and the plate surface is arranged along the vertical direction, and is provided in the unit case. And a second motor that rotates the rotation shaft via a rotation mechanism. The unit motor is moved up and down by rotating the lead screw by the first motor. It is characterized by being caused to appear and disappear from the opening.

In the present invention, the rotation mechanism includes a worm gear fixed to the output shaft of the second motor, and a helical gear that meshes with the worm gear and rotates the rotation shaft. To do.

In the present invention, the first motor is fixed to the lower surface side of the lower flange, and a gear is fixed to the output shaft of the first motor protruding to the upper surface side of the lower flange. It is characterized by being screwed into a gear fixed to the lower end of the screw.

In the present invention, a base portion having a diameter larger than that of the rotation shaft is fixed to the rotation shaft, and the base portion is formed with a screw constituting the rotation mechanism on the lower side. A combiner holder to which the combiner is attached is provided on the upper side.

In the present invention, the combiner holder is arranged such that the upper part protrudes from the upper opening of the unit case, and the combiner is attached to the combiner holder.

In the present invention, the unit case is provided with a pinion gear threadably engaged with the screw so as to be rotatable with an axis line parallel to the rotation shaft, and the helical gear having a larger diameter than the pinion gear is integrated with the pinion gear. It is characterized by being formed.

In the present invention, a projection unit for projecting an image toward the combiner is disposed in the case body adjacent to the frame and the raising / lowering region of the unit case. is there.

In the present invention, when the lead screw is rotated by the first motor, the unit case to which the nut screwed to the lead screw is fixed rises along the guide shaft, and the combiner provided at the upper part of the unit case is It protrudes outside the case body through the opening.

In this state, the second motor provided in the unit case rotates the rotating shaft in the unit case and rotates the combiner around the rotating shaft, thereby receiving the image projected from the projection unit. Adjust the shadow angle.

After using the HUD, when the combiner is raised by the second motor and the lead screw is rotated in the opposite direction by the first motor, the unit case descends along the guide shaft and the combiner opens. It is stored in the case body through the section.

As described above, by using the first and second motors, it is possible to cope with a plurality of types of driving such as the vertical movement and rotation of the combiner with a simple structure, and thus the overall arrangement can be made compact. .

Further, as a turning mechanism for turning the combiner, a worm gear fixed to the output shaft of the second motor and a helical gear that meshes with the worm gear and turns the turning shaft are used. Even if an external force acts in the rotation direction from the combiner side after adjusting the receiving angle of the combiner, the worm gear can prevent the combiner from rotating.

It is a side view which shows the state which made the combiner protrude from the case main body in one Embodiment of HUD which concerns on this invention. It is a perspective view of the principal part which shows. It is a perspective view of the principal part of FIG. It is the perspective view which abbreviate | omitted the flame | frame and unit case of FIG. It is a perspective view of the principal part which shows the state which accommodated the combiner of FIG. 1 in the case main body. FIG. 5 is a side view of FIG. 4. It is a perspective view which shows schematic structure of the conventional rotation storing type HUD. It is a perspective view of the principal part of FIG. It is a perspective view which shows the conventional pop-up storage type HUD.

1 to 5 show an embodiment of a pop-up storage type head-up display 1 (hereinafter abbreviated as HUD) according to the present invention. In the case body 1a of the HUD 1, an opening is formed in the top plate 1b, and a frame 2 is fixed inside. The frame 2 is a plate-like member in which an upper flange 2b and a lower flange 2c that are bent horizontally are formed at the upper and lower ends of the wall plate 2a. Between the upper flange 2b and the lower flange 2c, 2 Two guide shafts 3 are provided at intervals in the horizontal direction.

And along these guide shafts 3, a box-shaped unit case 4 having an upper surface opened is provided so as to be movable up and down. A lead screw 5 is disposed between the guide shafts 3 through the unit case 4 and upper and lower ends thereof are rotatably supported by the upper flange 2b and the lower flange 2c, respectively. On the other hand, on the lower surface side of the lower flange 2c, a stepping motor (first motor) 6 is fixed adjacent to the lower end portion of the lead screw 5, and the output shaft of the stepping motor 6 protruding on the upper surface side of the lower flange 2c is used. The gear 7 is fixed.

The gear 7 is screwed to a gear 8 fixed to the lower end portion of the lead screw 5, and a nut 9 fixed to the unit case 4 is screwed to the lead screw 5. Thus, when the stepping motor 6 is rotated, the unit case 4 to which the lead screw 5 is rotated and the nut 9 screwed with the lead screw 5 is fixed is moved up and down in the case main body 1a.

In this unit case 4, a rotating shaft 10 is arranged in a horizontal direction and supported so as to be rotatable around an axis. A base portion 11 having a diameter larger than that of the rotation shaft 10 is fixed to the central portion of the rotation shaft 10. The base portion 11 has a screw 11 a formed on the lower half of the circumference thereof, and a flat plate combiner holder 12 provided in parallel with the rotary shaft 10 on the outer circumference of the upper side.

The combiner holder 12 is arranged with the upper part protruding from the upper opening of the unit case 4, and the lower end part of the combiner 13 arranged with the plate surface along the vertical direction is attached to the combiner holder 12. Yes.

On the other hand, in the unit case 4, a pinion gear 14 screwed with the screw 11 a is rotatably provided with an axis line parallel to the rotation shaft 10, and the pinion gear 14 has a helical gear having a larger diameter than the pinion gear 14. 15 is integrally formed.

Further, a tilting stepping motor (second motor) 16 is mounted in the unit case 4 with its axis line oriented in the vertical direction. A worm gear 17 fixed to the output shaft of the tilting stepping motor 16 is engaged with the helical gear 15. The screw 11 a of the base 11, the pinion gear 14, the helical gear 15, and the worm gear 17 constitute a turning mechanism for turning the turning shaft 10.

In the case main body 1a, a projection unit (not shown) for projecting an image toward the combiner 13 is disposed adjacent to the lift areas of the frame 2 and the unit case 4. .

In the pop-up storage type HUD 1 configured as described above, when the lead screw 5 is rotated by the stepping motor 6, the unit case 4 to which the nut 9 screwed to the lead screw 5 is fixed rises along the guide shaft 3. As shown in FIGS. 1 to 3, the combiner 13 provided on the upper part of the unit case 4 passes through the opening and protrudes outside the case body 1a.

In this state, by rotating the helical gear 15 that meshes with the worm gear 17 by the tilting stepping motor 16 provided in the unit case 4, the pivot shaft 10 that meshes with the pinion gear 14 is rotated and the combiner is rotated. By rotating 13, the inclination angle of the image projected from the projection unit in the receiving direction is adjusted.

After use, the combiner 13 is raised by the tilting stepping motor 16, and the lead screw 5 is rotated in the opposite direction by the stepping motor 5, thereby lowering the unit case 4 along the guide shaft 3. 4 and FIG. 5, the combiner 13 is stored in the case main body 1a.

As described above, according to the pop-up storage type HUD 1, by using the two stepping motors 6 and the tilting stepping motor 16, it is possible to cope with a plurality of types of driving such as the vertical movement and rotation of the combiner 13 with a simple structure. Therefore, the overall arrangement can be made compact.

In addition, a worm gear 17 is provided on the output shaft of the tilting stepping motor 16, the helical gear 15 is engaged with the worm gear 17, the helical gear 15 is integrated, and the rotating shaft 10 is rotated by the pinion gear 14. Therefore, after adjusting the receiving angle of the combiner 13, even when an external force is applied in the rotation direction from the combiner 13 side, the tilt stepping motor 16 is rotated by the worm gear 17 and the combiner 13 is rotated. Can be prevented.

1 pop-up storage type HUD, 1a case body, 1b top plate, 2 frame, 2b upper flange, 2c lower flange, 3 guide shaft, 4 unit case, 5 lead screw, 6 stepping motor (first motor), 9 nut 10, rotating shaft, 13 combiner, 15 helical gear, 16 tilting stepping motor (second motor), 17 worm gear

Claims

A frame in which a plurality of guide shafts are arranged in parallel between the upper flange and the lower flange inside the case body having an opening formed in the top plate, and the frame is arranged in parallel with the guide shaft. A lead screw that is rotatably supported, a unit case that is provided so as to be movable in the vertical direction along the guide shaft of the frame, and in which a nut that engages with the lead screw is fixed, and the lead screw A lower end portion is integrated with an outer periphery of the first motor, a rotary shaft that is horizontally disposed in the unit case and is rotatably supported around the axis. And a combiner arranged with the plate surface along the vertical direction, and a second motor that is provided in the unit case and rotates the rotation shaft via a rotation mechanism. Ri,
A head-up display, wherein the lead screw is rotated by the first motor to raise and lower the unit case so that the combiner protrudes and retracts from the opening.
2. The rotating mechanism includes a worm gear fixed to the output shaft of the second motor, and a helical gear that meshes with the worm gear and rotates the rotating shaft. The head-up display described in 1.
The first motor is fixed to the lower surface side of the lower flange, and a gear is fixed to the output shaft of the first motor protruding to the upper surface side of the lower flange,
The head-up display according to claim 1, wherein the gear is screwed into a gear fixed to a lower end portion of the lead screw.
A base portion having a diameter larger than that of the rotation shaft is fixed to the rotation shaft.
2. The head according to claim 1, wherein the base portion is provided with a screw forming the rotating mechanism on a lower side and a combiner holder to which the combiner is attached on an upper side. Up display.
The head-up display according to claim 4, wherein the combiner holder is disposed with an upper portion protruding from an upper opening of the unit case, and the combiner is attached to the combiner holder.
In the unit case, a pinion gear that is screwed with the screw is rotatably provided with an axis parallel to the rotation shaft,
5. The head-up display according to claim 4, wherein the helical gear having a larger diameter than that of the pinion gear is integrally formed with the pinion gear.
The projection unit for projecting an image toward the combiner is disposed in the case main body adjacent to the frame and the raising / lowering region of the unit case. Head-up display.