JP2018192962A - Head-up display device - Google Patents

Abstract

To provide a head-up display device which achieves good assemblability while reducing the possibility that noise is caused by vibration applied to the device.SOLUTION: A head-up display device 100 according to the invention includes: a reflection part 4 which reflects display light L; a supported part 80 provided at the reflection part 4; a supporting part 90 which supports the supported part 80 so that the supported part 80 can rotate around a rotation axis AX; and an elastic member S2 which presses the supported part 80 to the supporting part 90. The elastic member S2 is a plate spring in which a through hole part S21 is formed at one end side and a hook part S22 is formed at the other end side. An engagement part 92 with which the hook part S22 engages and a screw hole part 91 in which the elastic member S2 is screwed through the through hole part S21 are provided so as to be perpendicular to the rotation axis AX and sandwich the supporting part 90. A pressing part S23 located between the hook part S22 and the through hole part S21 of the elastic member S2 presses the supported part 80 to the supporting part 90.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a head-up display device having a support structure that rotatably supports a reflecting member that reflects display light representing a predetermined image.

  In Patent Document 1, a second support portion that rotatably supports the reflecting member and a second supported portion that is provided at the other end portion of the reflecting member and supported by the second supporting portion are substantially in point contact. Alternatively, a head-up display having a reflecting member support structure that is assembled in line contact and presses the second supporting portion and the second supported portion to each other in a direction orthogonal to the rotation axis of the reflecting member by the second elastic member S2. An apparatus (HUD apparatus) is disclosed. According to the configuration of the HUD device, even if the vibration generated by traveling of the vehicle is transmitted and the HUD device vibrates, the vibration of the reflecting member is suppressed, and the blur of the displayed display image can be reduced.

JP 2014-85539 A

  However, the second elastic member, which is a leaf spring having a substantially U-shaped cross section sandwiching the second supporting portion and the second supported portion, must be elastically deformed and assembled, leaving room for improvement in assembling properties.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a head-up display device with good assembling properties while reducing the possibility that abnormal noise is generated due to vibration applied from the outside of the HUD device. And

The head-up display device according to the present invention includes:
A display that emits display light representing an image;
A reflective portion for reflecting the display light;
A supported portion provided in the reflecting portion;
A support part that rotatably supports the supported part as a rotation axis;
An elastic member that presses the supported portion against the supporting portion, and a head-up display device comprising:
The elastic member is a leaf spring in which a through hole portion is formed on one end side and a hook portion is formed on the other end side,
A locking portion for locking the hook portion and a screw hole portion for screwing the elastic member through the through-hole portion are provided so as to sandwich the support portion perpendicular to the rotation axis. ,
Pressing the supported part against the supporting part by a pressing part between the hook part and the through hole part of the elastic member;
Configure as follows.

In the head-up display device according to the present invention, the elastic member has a bent portion formed between the through hole portion and the pressing portion.
It is preferable to configure as described above.

The elastic member of the head-up display device according to the present invention has a handle portion formed at one end portion,
It is preferable to configure as described above.

The head-up display device according to the present invention includes:
A housing for accommodating the reflective portion;
The reflection portion is screwed to the housing via the screw hole portion,
It is preferable to configure as described above.

  ADVANTAGE OF THE INVENTION According to this invention, the head-up display apparatus with favorable assembly property can be provided, reducing the possibility that abnormal noise will generate | occur | produce by the vibration given from the HUD apparatus exterior.

1 is a schematic configuration diagram of a HUD device according to an embodiment of the present invention. The perspective view of the reflection part and reflection part rotation mechanism of the HUD device. The disassembled perspective view of the reflection part of the same HUD apparatus, and a reflection part rotation mechanism. The disassembled perspective view of the support body of the HUD device. The side view which shows the support structure of the same HUD apparatus. Sectional drawing which shows the support structure of the same HUD apparatus.

  A HUD device 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIGS. 1 and 2, the HUD device 100 includes a housing 1, a display 2, a plane mirror 3, a concave mirror (reflecting part) 4, a reflecting part rotating mechanism 5, and a circuit board (not shown). Prepare.

  The HUD device 100 reflects the display light L emitted by displaying a predetermined image on the display 2 by the plane mirror 3 and the concave mirror 4 and irradiates the windshield of the vehicle on which the HUD device 100 is mounted. The display light L irradiated to the windshield is viewed as a virtual image in front of the windshield as viewed from the vehicle occupant. The predetermined image is, for example, an image representing vehicle information such as the traveling speed of the vehicle and the engine speed.

  The housing 1 accommodates a display 2, a plane mirror 3, a concave mirror 4, a reflecting portion rotating mechanism 5, and a circuit board (not shown). The housing 1 is composed of a synthetic resin with a black inner surface in order to suppress stray light due to irregular reflection of the display light L emitted from the display device 2. The housing 1 has an opening 10 that emits the display light L outside the housing 1 at a portion facing the windshield. The opening 10 is covered with a cover 11 made of translucent resin such as acrylic resin.

  The display device 2 is a liquid crystal display or an organic EL display. The display 2 displays an image corresponding to the video signal transmitted from the circuit board and emits display light L.

  The plane mirror 3 reflects the display light L emitted from the display device 2 to the concave mirror 4. The plane mirror 3 can bend the optical path of the display light L to ensure a longer optical path length in the housing 1. By increasing the optical path length from the display 2 to the windshield, a virtual image can be displayed far from the windshield.

  The concave mirror 4 enlarges the display light L reflected by the plane mirror 3 and reflects it toward the windshield. Further, the concave surface of the concave mirror 4 has a concave shape that cancels out distortion caused by the shape of the curved windshield.

  The concave mirror 4 is rotatably supported by the reflecting portion rotating mechanism 5 and rotates around the rotation axis AX by the power of the reflecting portion rotating mechanism 5. The concave mirror 4 can adjust the position of the display light L emitted to the windshield up and down by rotating around the rotation axis AX. By this adjustment, a virtual image can be displayed at an appropriate position according to the height of the passenger's line of sight.

  The concave mirror 4 has a mirror part 40 in which a reflective film is formed on the surface of a concave base material made of synthetic resin. The mirror part 40 is bonded and fixed to a holder part 41 made of synthetic resin.

  The holder portion 41 has a first supported body 6 attached to one end portion (−X direction side end portion) and a second supported portion 80 formed to the other end portion (+ X direction side end portion). The first supported body 6 is formed with a gear portion 62 that transmits power of the first support body 7 to be described later.

  The reflection unit rotation mechanism 5 includes a first support 7 and a second support 9. The first support body 7 and the second support body 9 are fixed to the housing 1 with screws.

  The first support body 7 includes a motor 71, a gear 72, and a switch 77, and supports the first supported body so as to be rotatable around the rotation axis AX. The motor 71 is a stepping motor that generates power for rotating the concave mirror 4 around the rotation axis AX. The gear 72 is a gear that rotates with the rotation of the motor 71 and meshes with the gear portion 62, and the concave mirror 4 rotates when power is transmitted to the gear portion 62. When the gear portion 62 rotates to a predetermined position by the rotation of the motor 71, the switch 77 comes into contact with the lower end portion 62a of the gear portion 62 and is turned on. The rotational position of the concave mirror 4 can be accurately grasped by counting the rotation amount of the motor 71 from the position where the switch 77 is turned on.

  A first elastic member S <b> 1 is attached to the first supported body 6 and the first supported body 7 to press and fix the first supported body 7 and the first supported body 6 to each other.

  As shown in FIG. 4, the second support body 9 includes a support portion 90, a screw hole portion 91, a locking portion 92, and a second elastic member S2. The second support 9 supports the second supported portion 80 so as to be rotatable around the rotation axis AX.

  The support portion 90 is a bearing that supports the second supported portion 80. The screw hole 91 is a hole for fixing the second support 9 to the housing 1 together with the second elastic member S2. The locking part 92 is a through hole in which a hook part S22 of the second elastic member S2 described later is locked.

  The second elastic member S2 is a leaf spring having a through-hole portion S21 on one end side (+ Z direction side) and a hook portion S22 on the other end portion (−Z direction side end portion). When the second elastic member S <b> 2 is fixed by inserting the screw B through the through hole S <b> 21 and the screw hole 91 with the hook S <b> 22 inserted through the locking part 92, the pressing part S <b> 23 is supported by the support 90. It abuts against the second supported portion 80. That is, the through-hole part S21 and the hook part S22 are formed so as to sandwich the support part 90 perpendicular to the rotation axis AX, and the pressing part S23 is located at a position facing the support part 90. As a result, the second supported portion 80 is pressed against the support portion 90.

Further, the second elastic member S2 is formed with a bent portion S24 between the through hole portion S21 and the pressing portion S23. As shown in FIG. 6A, when the bent portion S24 is not formed, if the second elastic member S2 is distorted around the through-hole portion S21 by tightening with the screw B, the second supported member is supported. There may be a gap G between the portion 80 and the pressing portion S23. In this case, when the HUD device 100 vibrates due to transmission of a vibration generated by traveling of the vehicle or the like, abnormal noise is generated.
On the other hand, as shown in FIG. 6B, in the case where the bent portion S24 is formed, even if the second elastic member S2 is distorted around the through hole portion S21 by tightening with the screw B, this The distortion is not transmitted to the pressing portion S23 on the other end side (−Z direction side) from the bent portion S24, and there is little possibility that the gap G is generated between the second supported portion 80 and the pressing portion S23.

  Furthermore, a handle portion S25 that bends and extends upward (in the + Y direction) is provided at one end portion (+ Z direction side end portion) of the second elastic member S2. Since an operator who assembles the HUD device 100 can assemble with the handle portion S25, the assembleability is good.

  A third elastic member S3 is attached to the first supported body 6 and the first support body 7, and attracts each other in a direction that reduces backlash in a path for transmitting power from the motor 71 to the gear portion 62.

As described above, the head-up display device 100 according to the present invention includes the display 2 that emits the display light L representing the image, the reflection unit 4 that reflects the display light L, and the supported portion provided in the reflection unit 4. The head-up display device 100 includes a portion 80, a support portion 90 that rotatably supports the supported portion 80 as a rotation axis AX, and an elastic member S <b> 2 that presses the supported portion 80 against the support portion 90. The elastic member S2 is a leaf spring in which a through hole portion S21 is formed on one end side and a hook portion S22 is formed on the other end side. And the latching | locking part 92 in which the hook part S22 is latched, and the screw hole part 91 to which the elastic member S2 is screw-fixed via the through-hole part S21 are orthogonal to the rotating shaft AX, and pinches the support part 90. The supported portion 80 is pressed against the support portion 90 by the pressing portion S23 between the hook portion S22 and the through hole portion S21 of the elastic member S2.
By configuring in this way, it is not necessary to elastically deform and assemble, compared to a configuration sandwiched between leaf springs having a substantially U-shaped cross section, and thus the assemblability is improved.

Further, in the head-up display device 100 according to the present invention, a bent portion S24 is formed between the through hole portion S21 and the pressing portion S23 of the elastic member S2.
With this configuration, even if the tightening torque by the screw B is too strong and the second elastic member S2 is distorted around the through hole S21, the distortion is caused to be on the other end side (−Z direction) from the bent portion S24. The gap G is less likely to occur between the second supported portion 80 and the pressing portion S23 without being transmitted to the pressing portion S23 on the side). That is, the limitation on the assembly torque of the screw B during assembly is relaxed, and the assembly is good.

In the head-up display device 100 according to the present invention, a handle portion S25 is formed at one end of the elastic member S2.
By comprising in this way, since it can assemble | attach with this handle part S25, an assemblability is favorable.

In the head-up display device 100 according to the present invention, the reflecting portion 4 is screwed to the housing 1 via the screw hole portion 91.
By comprising in this way, the process of screwing elastic member S2 to the 2nd support body 9 and the process of screwing 2nd support body 9 to the housing | casing 1 can be carried out in one process, and assembly property is favorable. It is.

  Heretofore, the HUD device 100 according to an embodiment of the present invention has been described. The present invention is not limited to the HUD device 100, and may be changed to embodiments and drawings (including deletion of components) without departing from the spirit of the present invention.

  The present invention is suitable for a head-up display device mounted on a vehicle.

100: HUD device (head-up display device)
1: Housing 2: Display 3: Plane mirror 4: Concave mirror (reflection part)
80: Second supported part (supported part)
9: 2nd support body 90: Support part 91: Screw hole part 92: Locking part S2: Elastic member S21: Through-hole part S22: Hook part S23: Pressing part S24: Bending part S25: Handle part

Claims (4)

A display that emits display light representing an image;
A reflective portion for reflecting the display light;
A supported portion provided in the reflecting portion;
A support part that rotatably supports the supported part as a rotation axis;
An elastic member that presses the supported portion against the supporting portion, and a head-up display device comprising:
The elastic member is a leaf spring in which a through hole portion is formed on one end side and a hook portion is formed on the other end side,
A locking portion for locking the hook portion and a screw hole portion for screwing the elastic member through the through-hole portion are provided so as to sandwich the support portion perpendicular to the rotation axis. ,
Pressing the supported part against the supporting part by a pressing part between the hook part and the through hole part of the elastic member;
A head-up display device. The elastic member has a bent portion formed between the through hole portion and the pressing portion,
The head-up display device according to claim 1. The elastic member has a handle portion formed at one end,
The head-up display device according to claim 1, wherein the head-up display device is a head-up display device. A housing for accommodating the reflective portion;
The reflection portion is screwed to the housing via the screw hole portion,
The head-up display device according to claim 1, wherein the head-up display device is a head-up display device.

Images