JP6709506B2 - Head up display device - Google Patents

Description

The present invention relates to a head-up display device, and more particularly to a head-up display device that moves a combiner between a display position and a storage position.

A structure in which a combiner of a head-up display device is moved through a doorway formed in the housing case between a display position where an image is exposed to the outside and an image can be displayed and a housing position housed in the housing case is disclosed. It is described in Document 1 and Patent Document 2.

In particular, Patent Document 1 describes a structure for moving a combiner up and down through an opening, and Patent Document 2 describes a structure for closing a doorway with a shutter when the combiner is in a storage position.

JP, 2013-222174, A JP, 2014-222265, A

In the head-up display device described in Patent Document 1 and Patent Document 2, when the combiner is at the display position protruding from the entrance/exit of the housing case, a gap is created between the combiner and the entrance/exit, and dust is generated from this gap. Is likely to enter, which may affect the internal projection optical system.

Further, the head-up display device having the structure described in Patent Documents 1 and 2 is attached to, for example, a dashboard of an automobile, and an image projected on the combiner on the upper surface of the dashboard for entering and exiting the combiner and to the projected combiner. An opening is provided to secure the optical path of.

Therefore, when passengers spill drinks placed on the dashboard or when the vehicle is an open car and the roof is open and rain falls, the liquid such as water that has passed through the opening will flow out of the entrance and exit of the storage case. There was a risk of entering the interior.

As described above, the conventional head-up display device has room for improvement in that it is necessary to make it difficult for dust and liquid from the entrance to enter the inside of the combiner when the combiner is at the display position protruding to the outside. It was

Therefore, an object to be solved by the present invention is to provide a head-up display device in which dust and liquid do not easily enter the inside from the entrance through which the combiner enters and exits even when the combiner is at the display position.

In order to solve the above problems, the present invention has the following configuration 1).
1) a housing having an opening,
A combiner that moves between a first position housed in the housing and a second position in which at least one end side is exposed through the opening;
A cover that is attached to the other end of the combiner and closes a gap between the combiner and the inner surface of the housing to close the gap between the opening when the combiner is in the second position,
Equipped with
The combiner is
When in the second position is higher than in the first position, and moves up and down between the first position and the second position,
A shutter plate that closes the opening when the combiner is in the first position and opens the opening when the combiner is in the second position,
The cover is a head-up display device characterized in that when the combiner is in the second position, the cover closely presses the lower surface of the shutter plate .

According to the present invention, even if the combiner is at the display position, it is possible to obtain the effect that it is difficult for dust and liquid to enter the inside through the entrance and exit of the combiner.

FIG. 1 is a schematic cross-sectional view for explaining a housing position of a combiner 5a in a HUD device 51 that is an example of a head-up display device according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view for explaining the display position of the combiner 5a in the HUD device 51. FIG. 3 is a perspective view for explaining a storage position of the combiner 5a in the combiner unit Ta included in the HUD device 51. FIG. 4 is a perspective view for explaining the display position of the combiner 5a. FIG. 5 is a partial cross-sectional view for explaining the combiner body 5 included in the combiner unit Ta. FIG. 6 is a perspective sectional view for explaining the cover 5d included in the combiner body 5. FIG. 7 is a partial cross-sectional view for explaining a state near the opening 1b when the combiner 5a is at the display position. FIG. 8 is a schematic rear view for explaining the liquid discharge unit Tc.

A head-up display device according to an embodiment of the present invention will be described with reference to a head-up display device 51 (hereinafter, also referred to as a HUD device 51) of an example.

The HUD device 51 is housed inside, for example, a dashboard of a vehicle body of an automobile, and when used, a combiner 5a, which is a half mirror, is projected upward from the upper surface of the dashboard in the occupant's field of view (second position). , A device for projecting an image Ga on the projected combiner 5a so that an occupant can visually recognize it.
The occupant visually recognizes the background through the combiner 5a and the image Ga projected on the combiner 5a in an overlapping manner. The combiner 5a is housed inside the dashboard when not in use (first position).

FIG. 1 is a schematic sectional view for explaining a mounting state of the HUD device 51 in the dashboard.
The front-rear direction generally corresponds to the up-down front-rear direction of the vehicle body. That is, the front is the forward direction of the vehicle body.
Further, the vertical direction is a direction orthogonal to the opening line LH when the opening line LH, which is a plane including the opening surface of the opening 1b (details described later) of the housing 1 shown in FIG. 1, is horizontal. ..

The HUD device 51 is mounted inside a meter cover 61 that covers instruments in the dashboard of the vehicle body.
The combiner 5a (details will be described later) of the HUD device 51 moves in and out of the meter cover 61, and the projection unit Tb in the HUD device 51 projects an image Ga (the optical axis is shown in FIG. 2) onto the protruding combiner 5a. An opening 61a is formed for this purpose.

In FIG. 1, the HUD device 51 includes a modified box-shaped casing 1, a combiner unit Ta stored in the front part of the casing 1, and a projection unit Tb arranged in the rear part for projecting an image Ga on a combiner 5a. And a liquid discharge unit Tc.
The combiner unit Ta and the projection unit Tb are substantially partitioned by a partition wall 1a.
The housing 1 has an opening 1b above the combiner unit Ta for allowing the combiner 5a to move in and out between the storage position and the display position.

The projection unit Tb includes an image emission unit 21 that emits an image Ga (optical axis is shown by a dashed-dotted line) in an obliquely upward and rearward direction, and a reflection unit that reflects and deflects an image emitted from the image emission unit 21 in an obliquely upward and forward direction. And a mirror 22.

As shown in FIGS. 1 and 8, the liquid discharge unit Tc is arranged behind the shutter plate 6 described later, and has a liquid receiving portion 31 and a liquid discharge guide path 32.
Details of the liquid discharge unit Tc will be described later.

FIG. 3 is a perspective view for explaining the combiner unit Ta. The cross-sectional position of the combiner unit Ta in FIG. 1 is indicated by S1-S1 in FIG.
FIG. 3 shows a state in which the combiner 5a is housed in the combiner unit Ta.

The combiner unit Ta includes side panels 2 and 2 which are arranged to face each other in the left-right direction and each have a guide portion 2a extending in the vertical direction on the facing surface, and a combiner body 5 which is vertically moved by being driven by the guide portion 2a by driving of the lifting drive unit 3. And have.
Further, the combiner unit Ta has a shutter plate 6 arranged in the upper part so as to be slidably moved in the front-rear direction (see arrow DRa in FIG. 1:) by the drive of the shutter drive unit 4.

The combiner body 5 includes a holder 5b that holds a lower end portion 5a2 that is one end side of the combiner 5a, a holder base 5c that supports the holder 5b and engages with the guide portion 2a, and a foreign matter intrusion prevention cover attached to the holder 5b. 5d (hereinafter, simply referred to as a cover 5d).

The combiner 5a is, for example, a half mirror, and is formed as a bending member whose center portion is curved so as to project forward.
The rear surface 5a1 of the combiner 5a reflects and deflects the image Ga projected from the projection unit Tb toward the occupant (for example, the driver) at the use position shown in FIG.
The casing 1 has a transparent portion 1d that allows light to pass through the portion of the image Ga projected from the projection unit Tb.

The holder 5b supports the combiner 5a so as to wrap the entire lower end portion.
The cover 5d is further attached so as to wrap the entire circumference of the holder 5b. Details of the cover 5d will be described later.

The holder base 5c has engaging portions (not shown) that engage with the guide portions 2a at both left and right ends. One end side of the link mechanism RK (upper end in FIG. 4) is connected to the center portion in the left-right direction. The other end side (lower end in FIG. 4) of the link mechanism RK is connected to the drive shaft of the lifting drive unit 3.

The up-and-down drive unit 3 is, for example, a motor, and its rotation is converted into up-and-down movement by the link mechanism RK.
Therefore, the combiner 5a is guided by the guide portion 2a in accordance with the rotation and the rotation direction of the elevating/lowering drive portion 3 and the storage position in which the entire combiner 5a is stored in the housing 1 shown in FIGS. 2 and 4, at least the tip side moves up and down between the display position exposed to the outside of the housing 1.

The holder base 5c is provided with a tilting mechanism (not shown), and the standing angle as the posture of the combiner 5a at the display position can be adjusted in the front-back direction with the holder base 5c side as a fulcrum (FIG. 2). : See arrow DRb).

As shown in FIG. 1, the shutter plate 6 secures a space Va as a gap between the shutter plate 6 and the lower surface 1c1 of the upper wall 1c of the housing 1 by the operation of the shutter drive unit 4 (see also FIG. 7). , And slides in the direction of the arrow DRa in FIG. 1 along the lower surface 1c1.

As shown in FIGS. 1 and 3, the shutter plate 6 has a base portion 6a extending along the lower surface 1c1 of the upper wall 1c, and an extension surface of the base portion 6a from the front end of the base portion 6a. And a collar portion 6b slightly inclined in the clockwise direction.
A front end 6b1 of the collar portion 6b is formed in a curved shape corresponding to the rear surface 5a1 of the combiner 5a.

In the storage position of the combiner 5a shown in FIG. 1, the shutter plate 6 is in a position slid forward, and the front portions of the collar portion 6b and the base portion 6a close the opening portion 1b of the housing 1.
The shutter plate 6 is slid backward to open the opening 1b immediately before the combiner 5a is lifted, and allows the combiner 5a to be lifted.

The front end 6b1 of the shutter plate 6 is adapted to closely face the cover 5d (see FIG. 7) of the combiner body 5 at the position where the shutter plate 6 is slid backward.

Next, the cover 5d will be described mainly with reference to FIGS.
FIG. 5 is a detailed view of part A in FIG. 1, and is a cross-sectional view including a part of the lower end side of the combiner 5a, the holder 5b, and the cover 5d.
The holder 5b is made of resin, for example.
The cover 5d is made of a flexible material. An example of resin is silicone rubber.
FIG. 6 is a perspective sectional view for explaining the cover 5d. The cut surface of the cover 5d in FIG. 6 corresponds to the cut surface of the cover 5d in FIG.

The cover 5d is formed in an annular shape that extends in the left-right direction in a slender manner in the use state.
A long hole 5d1 extending in the left-right direction is formed in the center. The vicinity of the periphery of the long hole 5d1 is a substrate portion 5d2 that extends substantially in the front-rear, left-right direction on a plane.

The cover 5d is held by the holder 5b by engaging the elongated hole 5d1 with the holder 5b over the entire circumference. More specifically, the cover 5d engages the holder 5b with a strong fit, so that the space between both members is substantially sealed with respect to dust and liquid.

A front gutter portion 5d3a which is recessed downward is connected to the front edge of the front substrate portion 5d2a on the front side of the substrate portion 5d2.
Further, a rear gutter portion 5d3b which is recessed downward is connected to the rear edge of the rear side rear substrate portion 5d2b.
As shown in FIG. 5, the cross-sectional shape that is concave below the trough 5d3 is, for example, a rectangular concave.
The front gutter part 5d3a and the rear gutter part 5d3b are connected at left and right end parts to form a substantially trough-shaped gutter part 5d3.

The front wall 5d3c of the front gutter portion 5d3a extends upward and extends to almost the same height as the front substrate portion 5d2a.
The rear gutter 5d3b has a front wall 5d3c and a rear wall 5d3d, and the rear wall 5d3d is formed lower than the rear substrate 5d2b (shorter than the front wall 5d3c).

When the combiner body 5 having the above configuration is lifted from the housed position to the display position, as described above, the shutter plate 6 slides backward by the operation of the shutter drive unit 4 to open the housing 1. The part 1b is opened.
Next, the operation of the elevating/lowering drive unit 3 raises the holder base 5c via the link mechanism RK. Along with this, the combiner 5a supported by the holder base 5c ascends and is maintained at the display position shown in FIGS. 2 and 4.
After that, the image Ga is appropriately projected from the projection unit Tb onto the combiner 5a, and information is provided to the occupant as the image Ga.
In the above-described embodiment, the ascending/descending operation of the combiner 5a is performed by the ascending/descending drive unit 3, and the opening/closing of the shutter plate 6 is performed by the operation of the shutter drive unit 4.
Not limited to this, after the shutter plate 6 is changed from the closed state to the open state, a series of operations for raising the combiner 5a and the rising combiner 5a are lowered, and then the shutter plate 6 is changed from the open state to the closed state. A single drive device configured to sequentially execute the series of operations by the same cam gear may be used.

FIG. 7 is a diagram for explaining the state of the cover 5d at the display position of the combiner 5a.
As shown in FIG. 7, at the display position of the combiner 5a, the gutter portion 5d3 of the cover 5d abuts and presses the housing 1 and the shutter plate 6.

Specifically, the upper tip portion of the front wall 5d3c in the front gutter 5d3a presses the lower surface 1b1a which is the inner surface of the edge 1b1 of the opening 1b in the housing 1.
Further, the rear wall 5d3d of the rear gutter portion 5d3b comes into contact with and presses the lower surface 6b2 of the collar portion 6b of the shutter plate 6 (position indicated by arrow P1).
Similarly, the left side portion and the right side portion of the cover 5d also come into contact with and press the edge portion 1b1 of the housing 1 (position of arrow P2).

The cover 5d is formed of a flexible material as described above.
Further, a gutter portion 5d3 is formed on substantially the entire circumference of the cover 5d, and the front wall 5d3c and the rear wall 5d3d are elastically deformable when urged downward.

Therefore, due to the deformation repulsive force, the cover 5d presses the housing 1 and the shutter plate 6 in close contact with each other with substantially no space.
As a result, a waterproof line is formed by the close contact pressing portion of the cover 5d and the housing 1 and the shutter plate 6.
Further, since the cover 5d is formed of a flexible material, even if the standing angle of the combiner 5a is changed by the holder base 5c as described above, the cover 5d is elastically deformed and the casing of the cover 5d is changed. 1 and the close contact with the shutter plate 6 are maintained. Therefore, the waterproof line is not interrupted by adjusting the angle of the combiner 5a.

Due to the structure of forming the waterproof line, the opening 1b is favorably blocked by the cover 5d with respect to dust and liquid even when the combiner 5a is at the display position.
Therefore, it is difficult for dust and liquid to enter the inside of the HUD device 51 through the opening 1b.

Next, the liquid discharge unit Tc will be described.
When the combiner 5a is at the display position, the liquid discharge unit Tc
As shown in FIGS. 1 and 8, the liquid receiving portion 31 of the liquid discharge unit Tc is arranged behind the shutter plate 6 described later.
At the display position of the combiner 5a, most of the liquid (FIG. 7: arrow Wa) that has entered between the rear side opening 1b of the combiner 5a and the cover 5d flows to the rear gutter 5d3b, It flows backward from the flange 6b of the shutter plate 6 through the base 6a (FIG. 7: arrow Wb).
When the shutter plate 6 is slid rearward, the collar portion 6b has an inclined posture in which the rear side (base portion 6a side) is lowered, so that the liquid flows to the rear side by its own weight.

The liquid receiving portion 31 receives the liquid (see FIG. 2 and FIG. 8: arrow Wb) flowing backward from the flange portion 6b side of the shutter plate 6 to avoid the projection unit Tb (interference with the projection unit Tb. In order to avoid this, the liquid is guided to a pair of cylindrical drainage guide passages 32 branched to the left and right (FIG. 8: arrow Wc).
The opening 32 a at the lower end of the drainage guide path 32 is open to the outside of the housing 1, and the liquid (see FIG. 2: arrow Wd) flowing through the drainage guide path 32 by its own weight is removed from the housing 1. It is discharged to the outside below.

The embodiment of the present invention is not limited to the above-mentioned configuration, and may be modified within a range not departing from the gist of the present invention.

The cross-sectional shape of the cover 5d that is recessed below the trough portion 5d3 is not limited to the rectangular shape described above.
It may have a triangular shape, an arc shape, or the like, and the cross-sectional shape is not limited.
The trough portion 5d3 can temporarily store the liquid that has entered through the opening portion 1b. Therefore, it is preferable that the concave shape is a rectangle having a constant width from the inlet side to the inner side or a trapezoidal shape having a wider width on the inner side than the inlet side, because a larger amount of liquid can be stored.

The front wall 5d3c and the rear wall 5d3d may be formed in a bellows shape.
By forming these walls in a bellows shape, the pressing force on the lower surface 1c1 of the upper wall 1c and the shutter plate 6 is stabilized in the circumferential direction, and the waterproof line becomes stronger.

The HUD device 51 is not limited to being mounted in the dashboard of a car.
As described above, the combiner 5a is not limited to one that moves up and down in a standing posture that is generally oriented in the up-and-down direction. It may be one that goes up and down between and.

The image Ga projected on the combiner 5a may be a mere symbol or character, or any image as long as it is projected as light and can be visually recognized by an occupant.

Although the example in which the combiner 5a moves up and down has been described, the moving direction of the combiner 5a is not limited to up and down because the mounting posture of the HUD device 51 is not limited.
For example, the HUD device 51 may be mounted on a moving body operated by an occupant lying down on its side or a game device operated by the occupant. In this case, the combiner 5a is substantially horizontal between the accommodation position and the display position. Move in the direction.

When the combiner 5a is at the display position, the shutter plate 6 is retracted to a position sufficiently separated from the opening 1b, and the cover 5d does not contact the shutter plate 6 and the lower surface 1b1a of the edge 1b1 near the opening 1b. Alternatively, it may be configured to press closely.

1 case 1a partition wall, 1b opening, 1b1 edge 1b1a lower surface, 1c upper wall, 1c1 lower surface, 1d transparent section 2 side panel, 2a guide section 3 lift drive section 4 shutter drive section 5 combiner body 5a combiner, 5a1 rear surface , 5a2 lower end 5b holder, 5c holder base 5d cover (foreign matter entry cover), 5d1 long hole 5d2 substrate part, 5d2a front substrate part, 5d2b rear substrate part 5d3 gutter part, 5d3a front gutter part, 5d3b rear gutter part Wall, 5d3d Rear wall 6 Shutter plate 6a Base part, 6b Collar part, 6b1 Front end 21 Image emitting part, 22 Reflector 31 Liquid receiving part, 32 Drainage guide path 51 Head-up display device (HUD device)
61 meter cover, 61a opening Ga image LH opening line RK link mechanism Ta combiner unit Tb projection unit Tc liquid discharge unit Va space

Claims (3)

A housing having an opening,
A combiner that moves between a first position housed in the housing and a second position in which at least one end side is exposed through the opening;
A cover that is attached to the other end of the combiner and closes a gap between the combiner and the inner surface of the housing to close the gap between the opening when the combiner is in the second position,
Equipped with
The combiner is
When in the second position is higher than in the first position, and moves up and down between the first position and the second position,
A shutter plate that closes the opening when the combiner is in the first position and opens the opening when the combiner is in the second position,
The head-up display device , wherein the cover closely presses the lower surface of the shutter plate when the combiner is in the second position . A liquid receiving portion for receiving the liquid flowing from the opening side on the upper surface of the shutter plate when the combiner is in the second position,
A liquid receiving path for discharging the liquid received by the liquid receiving portion to the outside from the lower part of the housing by its own weight;
Head-up display apparatus according to claim 1, comprising the liquid discharge unit having a. A projection unit for projecting an image on the combiner,
The head-up display device according to claim 2 , wherein the liquid discharge unit is arranged so as to avoid the projection unit.

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