JP6836718B2 - Head-up display device - Google Patents

Description

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

In Patent Document 1, a second support portion that rotatably supports the reflective member and a second supported portion provided at the other end of the reflective member and supported by the second support portion are substantially in point contact with each other. Alternatively, a head-up display having a reflective member support structure in which the second elastic member S2 presses the second support portion and the second supported portion against each other in a direction orthogonal to the rotation axis of the reflective member while being assembled in line contact. The device (HUD device) is disclosed. According to the configuration of this HUD device, even if the shaking generated by the running of the vehicle is transmitted and the HUD device vibrates, the vibration of the reflective member is suppressed, and the blurring of the visually recognized display image can be reduced.

Japanese Unexamined Patent Publication No. 2014-85539

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

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a head-up display device having good assembling property while reducing the possibility of abnormal noise being generated due to vibration given from the outside of the HUD device. And.

The head-up display device according to the present invention is
A display that emits display light that represents an image,
The reflecting part that reflects the display light and
A supported portion provided on the reflective portion and a supported portion
A support portion that rotatably supports the supported portion as a rotation axis,
A head-up display device including an elastic member that presses the supported portion against the supported portion.
The elastic member is a leaf spring having a through hole portion formed on one end side and a hook portion formed on the other end side.
A locking portion in which the hook portion is locked and a screw hole portion in which the elastic member is screw-fixed via the through hole portion are provided so as to sandwich the support portion at right angles to the rotation axis. ,
With pressing the supported portion to the support portion by the pressing portion located between the hook portion and the through-hole of the elastic member,
The elastic member has a handle portion formed at one end thereof.
It is configured as follows.

The head-up display device according to the present invention is
A display that emits display light that represents an image,
The reflecting part that reflects the display light and
A supported portion provided on the reflective portion and a supported portion
A support portion that rotatably supports the supported portion as a rotation axis,
A head-up display device including an elastic member that presses the supported portion against the supported portion.
The elastic member is a leaf spring having a through hole portion formed on one end side and a hook portion formed on the other end side.
A locking portion in which the hook portion is locked and a screw hole portion in which the elastic member is screw-fixed via the through hole portion are provided so as to sandwich the support portion at right angles to the rotation axis. ,
The supported portion is pressed against the support portion by a pressing portion between the hook portion and the through hole portion of the elastic member.
The elastic member has a bent portion formed between the through hole portion and the pressing portion.
You configured.

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

The head-up display device according to the present invention is
A housing for accommodating the reflective portion is provided.
The reflective portion is screwed to the housing via the screw hole portion.
It is preferable to configure it as follows.

According to the present invention, it is possible to provide a head-up display device having good assembling property while reducing the possibility of abnormal noise being generated due to vibration given from the outside of the HUD device.

The block diagram of the HUD apparatus which concerns on one Embodiment of this invention. The perspective view of the reflection part and the reflection part rotation mechanism of the HUD apparatus. It is an exploded perspective view of the reflection part and the reflection part rotation mechanism of the HUD apparatus. An exploded perspective view of the support of the HUD device. The side view which shows the support structure of the HUD apparatus. The cross-sectional view which shows the support structure of the HUD apparatus.

The HUD apparatus 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 (reflection unit) 4, a reflection unit rotation mechanism 5, and a circuit board (not shown). Be prepared.

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 applied to the windshield is visually recognized as a virtual image in front of the windshield when viewed from the passengers of the vehicle. The predetermined image is, for example, an image showing vehicle information such as the traveling speed of the vehicle and the engine speed.

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

The display 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 the display light L.

The plane mirror 3 reflects the display light L emitted by the display 2 on the concave mirror 4. With the plane mirror 3, the optical path of the display light L can be bent to secure a longer optical path length in the housing 1. By lengthening the optical path length from the display 2 to the windshield, the 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 surface shape that cancels the distortion due to the shape of the curved windshield.

The concave mirror 4 is rotatably supported by the reflecting portion rotating mechanism 5, and is rotated around the rotating shaft AX by the power of the reflecting portion rotating mechanism 5. By rotating the concave mirror 4 around the rotation axis AX, the position of the display light L emitted from the windshield can be adjusted up and down. With this adjustment, the 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 portion 40 having a reflective film formed on the surface of a concave base material made of synthetic resin. The mirror portion 40 is adhesively fixed to a holder portion 41 made of synthetic resin.

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

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

The first support 7 includes a motor 71, a gear 72, and a switch 77, and rotatably supports the first supported body 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 due to 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. By counting the amount of rotation of the motor 71 based on the position where the switch 77 is turned on, the rotation position of the concave mirror 4 can be accurately grasped.

A first elastic member S1 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 9 has a support portion 90, a screw hole portion 91, a locking portion 92, and a second elastic member S2. The second support 9 rotatably supports the second supported portion 80 around the rotation axis AX.

The support portion 90 is a bearing that supports the second supported portion 80. The screw hole portion 91 is a hole for screwing the second support 9 to the housing 1 together with the second elastic member S2. The locking portion 92 is a through hole into which the hook portion S22 of the second elastic member S2, which will be 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 S2 is fixed by inserting the screw B into the through hole portion S21 and the screw hole portion 91 in a state where the hook portion S22 is inserted into the locking portion 92, the pressing portion S23 supports the support portion 90. It comes into contact with the second supported portion 80. That is, the through hole portion S21 and the hook portion S22 are formed so as to sandwich the support portion 90 orthogonal to the rotation axis AX, and the pressing portion S23 is located at a position facing the support portion 90. As a result, the second supported portion 80 is pressed against the support portion 90.

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

Further, one end portion (+ Z direction side end portion) of the second elastic member S2 has a handle portion S25 that bends and extends upward (+ Y direction). Since the worker who assembles the HUD device 100 can assemble by holding the handle portion S25, the assembleability is improved.

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

As described above, the head-up display device 100 according to the present invention includes a display 2 that emits display light L representing an image, a reflection unit 4 that reflects the display light L, and a supported portion provided on 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 S2 that presses the supported portion 80 against the support portion 90. Further, the elastic member S2 is a leaf spring having a through hole portion S21 formed on one end side and a hook portion S22 formed on the other end side. Then, the locking portion 92 in which the hook portion S22 is locked and the screw hole portion 91 in which the elastic member S2 is screw-fixed via the through hole portion S21 sandwich the support portion 90 orthogonally to the rotation shaft AX. 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.
With this configuration, it is not necessary to elastically deform and assemble as compared with the configuration of sandwiching between leaf springs having a substantially U-shaped cross section, so that the assembleability 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 portion S21, this distortion is on the other end side (-Z direction) from the bent portion S24. There is little possibility that a gap G will be formed 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 of the assembling torque of the screw B at the time of assembling is relaxed, and the assembling property is good.

Further, 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.
With this configuration, the handle portion S25 can be held and assembled, so that the assembling property is good.

Further, in the head-up display device 100 according to the present invention, the reflective portion 4 is screw-fixed to the housing 1 via the screw hole portion 91.
With this configuration, the step of screwing the elastic member S2 to the second support 9 and the step of screwing the second support 9 to the housing 1 can be performed in one step, and the assembling property is good. Is.

The HUD device 100 according to the embodiment of the present invention has been described above. The present invention is not limited to the HUD device 100, and may be changed to embodiments and drawings (including deletion of components) within a range that does not deviate from the gist.

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 (reflector)
80: Second supported portion (supported portion)
9: Second support 90: Support 91: Screw hole 92: Locking part S2: Elastic member S21: Through hole S22: Hook part S23: Pressing part S24: Bending part S25: Handle part

Claims (4)

A display that emits display light that represents an image,
The reflecting part that reflects the display light and
A supported portion provided on the reflective portion and a supported portion
A support portion that rotatably supports the supported portion as a rotation axis,
A head-up display device including an elastic member that presses the supported portion against the supported portion.
The elastic member is a leaf spring having a through hole portion formed on one end side and a hook portion formed on the other end side.
A locking portion in which the hook portion is locked and a screw hole portion in which the elastic member is screw-fixed via the through hole portion are provided so as to sandwich the support portion at right angles to the rotation axis. ,
With pressing the supported portion to the support portion by the pressing portion located between the hook portion and the through-hole of the elastic member,
The elastic member has a handle portion formed at one end thereof.
A head-up display device characterized by this. A display that emits display light that represents an image,
The reflecting part that reflects the display light and
A supported portion provided on the reflective portion and a supported portion
A support portion that rotatably supports the supported portion as a rotation axis,
A head-up display device including an elastic member that presses the supported portion against the supported portion.
The elastic member is a leaf spring having a through hole portion formed on one end side and a hook portion formed on the other end side.
A locking portion in which the hook portion is locked and a screw hole portion in which the elastic member is screw-fixed via the through hole portion are provided so as to sandwich the support portion at right angles to the rotation axis. ,
The supported portion is pressed against the support portion by a pressing portion between the hook portion and the through hole portion of the elastic member.
The elastic member has a bent portion formed between the through hole portion and the pressing portion.
A head-up display device characterized by this. The elastic member has a handle portion formed at one end thereof.
The head-up display device according to claim 2. A housing for accommodating the reflective portion is provided.
The reflective portion is screwed to the housing via the screw hole portion.
The head-up display device according to any one of claims 1 to 3.

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