JP2017207543A - Head-up display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head-up display device having a rotation mechanism of a reflection mirror achieving vibration resistance and assembling property.SOLUTION: A head-up display device H relating to the present invention projects display light L emitted by a display 1 onto a screen via a reflection mirror 2 so as to display a virtual image of the display light L ahead of the screen. The display device has a first magnet 24 disposed on a shaft 21 functioning as a rotation axis of the reflection mirror 2, and a second magnet 25 that is rotated, in a non-contact state with the first magnet 24, by the power of an electric motor 23. Thus, the reflection mirror 2 is rotated by the power of the electric motor 23.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a head-up display device having a reflecting mirror rotating mechanism.

  A conventional head-up display device is disclosed in Patent Document 1. This head-up display device is a rotating mechanism of a reflecting mirror having high vibration resistance by a plurality of elastic bodies.

JP 2014-85539 A

  However, the number of parts is large and the assembling procedure is complicated, and there is room for improvement in assembling properties.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a head-up display device having a reflecting mirror rotating mechanism that achieves both vibration resistance and assembly.

The head-up display device according to the present invention includes:
A head-up display device that projects display light emitted from a display onto a screen via a reflecting mirror, and displays a virtual image of the display light in front of the screen,
A first magnet provided on a shaft portion serving as a rotation axis of the reflecting mirror;
A second magnet that is rotated by the power of the electric motor in a non-contact state with the first magnet,
The reflecting mirror is rotated by the power of the electric motor.

The head-up display device according to the present invention includes:
A stopper that suppresses the first magnet from moving closer to the second magnet than a position separated by a predetermined distance;
It is preferable to configure as described above.

  ADVANTAGE OF THE INVENTION According to this invention, the head-up display apparatus which has the rotation mechanism of the reflecting mirror which was compatible with vibration resistance and assembly | attachment property can be provided.

1 is a schematic configuration diagram of a head-up display device according to an embodiment of the present invention. The figure which shows the structure of the reflective mirror of the head-up display apparatus. AA sectional drawing of the same reflective mirror.

  Hereinafter, a head-up display device H according to an embodiment of the present invention will be described with reference to the accompanying drawings. In each drawing, Up, Dn, Fw, Bk, Lt, and Rt indicate directions of the vehicle on which the head-up display device H is mounted, Up is above the vehicle, Dn is below the vehicle, and Fw is the vehicle. Front (traveling direction), Bk is the rear, Lt is the left side of the vehicle, and Rt is the right side of the vehicle.

  As shown in FIG. 1, the head-up display device includes a display 1 that emits display light L representing vehicle information, a reflective mirror 2 that reflects the display light L, and a housing that houses the display 1 and the reflective mirror 2. A body 3. The display light L is emitted from the display 1, then reflected by the reflecting mirror 2, and emitted from the acrylic resin translucent cover 30 of the housing 3 to the outside of the housing 3. The display light L emitted outside the housing 3 is projected onto a translucent screen such as a windshield or a combiner of the vehicle, and a virtual image is displayed in front of the translucent screen.

  The display device 1 is, for example, a liquid crystal display device that displays an image. The display 1 is controlled by control means (not shown) and emits display light L representing vehicle information toward the reflecting mirror 2.

  The reflecting mirror 2 includes a base 20, a pair of first and second shaft portions 21 and 22 that serve as a rotation axis of the base 20, an electric motor 23 that serves as power for rotating the base 20, and power of the electric motor 23. It is mainly composed of a pair of first magnets 24 and second magnets 25 that transmit to the one shaft portion 21.

  The base 20 is a main body of the reflecting mirror 2 in which a concave reflecting surface is formed by depositing metal on the surface of the resin member.

  The first shaft portion 21 and the second shaft portion 22 are resin-made cylindrical shafts extending from the side surface (left Lt direction, right Rt direction) of the base portion 20. The first shaft portion 21 and the second shaft portion 22 are formed with stoppers 210 and 220 each having a convex portion facing the first magnet 24.

  The first magnet 24 and the second magnet 25 are a pair of annular permanent magnets having the same outer shape and number of magnetic poles. The first magnet 24 is press-fitted and fixed to the tip of the first shaft portion 21, and the second magnet 25 is press-fitted and fixed to the tip of the rotating shaft of the electric motor 23.

  The housing 3 includes a first support portion 31, a second support portion 32, and a third support portion 33 made of resin, and a first plate spring 34 and a second plate spring 35 made of metal.

V-shaped or U-shaped bearings are formed on the first support portion 31 and the second support portion 32. In the reflecting mirror 2, the first shaft portion 21 is arranged such that the first support portion 31 is located between the first magnet 24 and the stopper 210, and the second support portion 32 is located between the base portion 20 and the stopper 220. Is supported by the first support portion 31, and the second shaft portion 22 is supported by the second support portion 32. Further, in a state where the first shaft portion 21 is supported by the first support portion 31, the leaf spring 34 is screwed to the first support portion 31 so that the first shaft portion 21 is pressed against the bearing of the first support portion 31. Fixed. Similarly, in a state where the second shaft portion 22 is supported by the second support portion 32, the leaf spring 35 is attached to the second support portion 32 so that the second shaft portion 22 is pressed against the bearing of the second support portion 32. Screw fixed.
By comprising in this way, the 1st axial part 21 and the 2nd axial part 22 suppress the rattling of an up-down direction and the front-back direction.

  The third support portion 33 is formed with a V-shaped or U-shaped elongated hole, and the electric motor 23 is screw-fixed in a state in which the rotation shaft of the electric motor 23 having the second magnet 25 fixed is passed through the elongated hole. The

  By configuring in this way, the stoppers 210 and 220 prevent the first magnet 24 from moving closer to the position away from the second magnet 25 by a predetermined distance. Therefore, the first magnet 24 and the second magnet 25 are arranged so as to face each other and attract each other in a non-contact state, and the reflecting mirror 2 rotates in accordance with the rotation of the electric motor 23 by a magnetic coupling method. Moreover, since the stoppers 210 and 220 press the first support part 31 and the second support part 32 by the attractive force of the first magnet 24 and the second magnet 25, the rattling in the left-right direction is suppressed.

As described above, the head-up display device H according to the present invention projects the display light L emitted from the display 1 onto the screen via the reflecting mirror 2 and displays the virtual image of the display light L in front of the screen. The display device H is a first magnet 24 provided on a shaft portion 21 that serves as a rotating shaft of the reflecting mirror 2, and a second magnet 25 that is rotated by the power of the electric motor 23 in a non-contact state with the first magnet 24. And the reflecting mirror 2 is rotated by the power of the electric motor 23.
Since the head-up display device H uses the forces attracted to each other by the first magnet 24 and the second magnet 25 to suppress the rattling in the left-right direction, a member that suppresses the rattling in the left-right direction can be eliminated. Moreover, since the 1st magnet 24 and the 2nd magnet 25 which transmit motive power are non-contact, the workability | operativity at the time of an assembly | attachment is good. Thereby, it is possible to provide a head-up display device having a reflecting mirror rotating mechanism that achieves both vibration resistance and assembling performance.

  The present invention is not limited to the above-described embodiments (including the contents of the drawings). Modifications can be made to the above embodiment within the scope of the gist of the present invention.

H: Head-up display 1: Display 2: Reflector 20: Base 21: First shaft portion 210: Stopper 22: Second shaft portion 220: Stopper 23: Electric motor 24: First magnet 25: Second magnet 3: Housing Body 30: Translucent cover 31: 1st support part 32: 2nd support part 33: 3rd support part 34: 1st leaf | plate spring 35: 2nd leaf | plate spring

Claims (2)

A head-up display device that projects display light emitted from a display onto a screen via a reflecting mirror, and displays a virtual image of the display light in front of the screen,
A first magnet provided on a shaft portion serving as a rotation axis of the reflecting mirror;
A second magnet that is rotated by the power of the electric motor in a non-contact state with the first magnet,
The reflecting mirror is rotated by the power of the electric motor.
A head-up display device. A stopper that suppresses the first magnet from moving closer to the second magnet than a position separated by a predetermined distance;
The head-up display device according to claim 1.

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