JP4433158B2 - Vehicle display device - Google Patents

Description

  The present invention relates to a display device for a vehicle, and more particularly to a display device for a vehicle that displays a virtual image by reflecting display light emitted from a light-emitting display.

Conventionally, various head-up display devices that display a virtual image by reflecting display light emitted from a light-emitting display device such as a fluorescent display tube have been proposed. The head-up display device is disposed on the dashboard 1 of the vehicle, and displays the virtual image V by reflecting the display light L emitted from the light emitting display 2 with the reflection mirror 3 (see FIG. 5). . The reflection mirror 3 is affixed to a holding member 4, and the holding member 4 is supported by a housing 5 in a rotatable state so that the reflection mirror 3 can be opened and closed (see FIG. 6). A hole 5 a is formed in the housing 5 so that the holding member 4 can rotate and the reflection mirror 3 can be opened and closed.
Japanese Utility Model Publication No. 63-9041

  A gear 6 is fixed to the holding member 4, and a gear 8 fixed to the rotating shaft 7 a of the motor 7 is engaged with the gear 6. The reflection mirror 3 can be opened and closed about the rotation shaft 4a of the holding member 4. The reflection mirror 3 is closed when the head-up display device is not used, and is reflected by the driving force of the motor 7 when used. The mirror 3 can be opened to a predetermined angular position. Further, since the angular position of the reflection mirror 3 is adjusted according to the eye level of the driver, the motor 7 can be driven by operating a push button switch (not shown) to rotate the reflection mirror 3.

However, there is a possibility that liquid may enter from the hole 5a of the housing 5 and a device inside the housing 5 may break down. For example, when a driver spills a drink such as juice into the dashboard 1, the drink enters the inside of the housing 5 through the hole 5a, and the electric control devices such as the motor 7 and the circuit board break down. There was a problem.
The present invention has been made in view of this problem, and provides a display device for a vehicle in which even if a liquid enters from a hole portion of the housing, there is no possibility that a device accommodated in the housing will break down.

In order to solve the above-described problem, the present invention provides a display device for a vehicle that displays a virtual image by display light emitted from a display device, and is supported in an openable / closable state. Reflecting means 10 for reflecting the light, driving means for opening and closing the reflecting means 10, a housing 40 having at least the upper case 41 and the lower case 42 for accommodating the driving means 20, a bottom wall 60a and a side wall 60b. A discharge member 60 attached to the upper case 41, and the reflecting means 10 includes a shaft portion formed by a bearing portion 60d provided on the side wall 60b of the discharge member 60 and a bearing portion 41b of the upper case 41. 60d is sandwiched, Rutotomoni supported by openable state, the discharge member 60, the upper case 41 formed in the vicinity of the shaft portion 60d of the reflection means 10 And it has a discharge portion 60c for the liquid from the hole 41a penetrated into the housing 40 to discharge the liquid so as not applied to the driving unit 10 to the outside of the housing 40.

According to a second aspect of the present invention, the reflecting means 10 includes a reflecting mirror 11 that reflects the display light and a holding member 12 that holds the reflecting mirror 11.

The present invention, as set forth in claim 3, wherein the holding member 12 is one having the shaft portion 12b that is sandwiched between the discharge member 60 and the housing 40.

  The liquid that has entered the housing can be discharged out of the housing, and there is little risk of failure of the equipment accommodated in the housing.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The head-up display device includes a reflecting means 10, a first driving means 20, a second driving means 30, a housing 40, a detection element 50, and a discharge member 60. In order to prevent the drawing from becoming complicated, in FIG. 1, the second driving means 30 is indicated by a dotted line and is not denoted by a reference numeral.

  The reflecting means 10 includes a reflecting mirror 11 and a holding member 12 that holds the reflecting mirror 11. The reflection mirror 11 is formed by vapor-depositing a reflection layer on a resin substrate made of polycarbonate, and reflects the display light L emitted from the light emitting display. The holding member 12 includes a substantially fan-shaped base portion 12a, a substantially cylindrical shaft portion 12b, a holding portion 12c to which the reflecting mirror 11 is attached, and a substantially fan-shaped gear portion 12d. The base portion 12a is provided at one end of the shaft portion 12b, and the gear portion 12d is provided at the other end of the shaft portion 12b.

  The base 12a includes a recess 12e that faces a protruding portion of a lever (to be described later) when the reflecting means 10 is opened to a predetermined angular position, and a contact surface 12f that is pressed by the protruding portion when the reflecting means 10 is closed. Are formed (see FIG. 2). The gear portion 12d is formed with a gear portion 12g that meshes with a gear member described later (see FIG. 1). The shaft portion 12b of the reflecting means 10 is sandwiched between the housing 40 and the discharge member 50, and the reflecting means 10 is supported in a rotatable state.

  The first driving means 20 has a DC motor 21 and a first driving mechanism 200 that transmits the driving force of the DC motor 21 to the reflecting means 10 (see FIG. 1). The first drive mechanism 200 includes a worm 24 fixed to the rotation shaft 21 a of the DC motor 21, a worm wheel member 25 meshing with the worm 24, and a gear member disposed coaxially with the worm wheel member 25. 26. The worm 24 has a four-threaded portion 24 a that meshes with the worm wheel member 25. The gear member 26 meshes with the gear portion 12 g of the holding member 12.

  The second driving means 30 has a stepping motor 31 and a second driving mechanism 300 that transmits the driving force of the stepping motor 31 to the reflecting means 10 (see FIG. 2). The second drive mechanism 300 includes a cam 32 fixed to the rotation shaft 31a of the stepping motor 31, a frame member 33 supported by the housing 40 so as to be slidable in the lateral direction, and the frame member 33 as a cam. A spring 34 that pulls the frame member 33 so as to abut against the lever 32, a lever 35 that is pivotally supported by the frame member 33, and a spring 36 that is provided at the tip of the lever 35.

The frame member 33 is pulled rightward by the spring 34, and the contact portion 33 a is in contact with the cam 32. The frame member 33 slides as the cam 32 rotates.
The lever 35 has a substantially semicircular protruding portion 35a in a side view, and is pivotally supported by the frame member 33 so as to be rotatable by a shaft portion 35b provided at the rear end portion. The lever 35 is pulled upward by a spring 36 provided at the distal end portion, and the protruding portion 35 a is in contact with the base portion 12 a of the holding member 12.

The housing 40 includes an upper case 41 and a lower case 42. The upper case 41 is formed with a hole 41a so that the holding member 12 can rotate.
The detection element 50 is composed of a limit switch or the like, and detects that the protruding portion 35a of the lever 35 is fitted in the concave portion 12e of the holding member 12 and the reflecting means 10 is opened at a predetermined angular position.

  The discharge member 60 has a bottom wall 60a, a side wall 60b, and a discharge portion 60c, and is attached to the upper case 41 by screws (not shown). The liquid that has entered from the hole 41a of the upper case 41 is discharged out of the housing 40 from the discharge portion 60c. The discharge part 60c has a substantially rectangular tube shape and has a discharge hole. A bearing portion 60 d is provided on the side wall 60 b of the discharge member 60, and the shaft portion 12 b of the holding member 12 is sandwiched between the bearing portion 60 d of the discharge member 60 and the bearing portion 41 b of the upper case 41.

  Next, opening and closing of the reflecting means 10 will be described in detail. The reflective means 10 can be closed when the head-up display device is not used, and the reflective means 10 can be opened to a predetermined angular position by the first driving means 20 when used. When the reflecting member 10 is opened, the rotating shaft 21 a of the DC motor 21 rotates, and the driving force of the DC motor 21 is transmitted to the holding member 12 via the first driving mechanism 200. The base portion 12a of the holding member 12 rotates counterclockwise while abutting against the protruding portion 35a of the lever 35, and when the reflecting means 10 rises to a predetermined angular position, the protruding portion 35a of the lever 25 moves to the holding member 12. The reflecting means 10 is positioned by fitting into the recess 12e.

  When the reflecting means 10 is closed, the rotating shaft 21a of the DC motor 21 rotates, the driving force of the DC motor 21 is transmitted to the holding member 12 via the first driving mechanism 200, and the base portion 12a of the holding member 12 is moved to the lever. It rotates clockwise while abutting against the protruding portion 35a of 35. When the reflecting means 10 is completely closed, the contact surface 12f of the base portion 12a is pressed by the protruding portion 35a of the lever 35.

  Next, the angle adjustment of the reflecting means 10 will be described in detail. When the reflecting means 10 is opened to a predetermined angular position, the angle A of the reflecting means 10 can be adjusted by operating a push button switch described later. When the angle A of the reflecting member 10 is reduced, the cam 32 rotates to the left together with the rotating shaft 31a of the stepping motor 31, the frame member 33 and the lever 35 slide to the left, and the holding member 12 rotates clockwise. Move.

  When the angle A of the reflecting member 10 is increased, the cam 32 rotates to the right together with the rotation shaft 31a of the stepping motor 31, the frame member 33 and the lever 35 slide to the right, and the holding member 12 rotates counterclockwise. To turn.

FIG. 4 is a block diagram showing an electrical configuration for driving the DC motor 21 and the stepping motor 31.
Reference numerals 51, 52, and 53 denote push button switches. The push button switches 51, 52, and 53 output an operation signal to a control unit 54 such as a microcomputer. The push button switch 51 opens and closes the reflecting means 10, and the control unit 54 drives the DC motor 21 via the drive circuit 55 when an operation signal from the push button switch 51 is input.

  The push button switches 52 and 53 adjust the angle of the reflecting means 10, and the control unit 54 drives the motor 31 via the drive circuit 56 when an operation signal from the push button switches 52 and 53 is input. To do. The push button switch 52 is for reducing the angle A of the reflecting means 10, and the push button switch 53 is for increasing the angle B of the reflecting means 10. The detection element 50 outputs a detection signal to the control unit 54 when the reflecting means 10 is opened at a predetermined angular position.

  When the operation signal from the pushbutton switch 51 is input, the control unit 54 drives the DC motor 21 and opens the reflecting means 10. Further, the control unit 54 drives the stepping motor 31 based on the operation signal from the push button switch 52 or the push button switch 53 to adjust the angle A of the reflecting means 10.

  According to the present embodiment, the liquid that has entered the housing 40 from the hole 41a of the upper case 41 is discharged out of the housing 40 by the discharge member 60. For example, when the driver zeroes the drink In addition, the first drive means 20 and the second drive means 30 are less likely to be damaged by the drink.

  In addition, since the upper case 41 and the discharge member 60 sandwich the shaft portion 12b of the holding member 12 and pivotally support the reflecting means 10, a dedicated member for pivotally supporting the reflecting means 10 is unnecessary, and the number of parts is reduced. There are few, and assembly is easy.

  In addition, although the reflection means 10 of this embodiment has the reflective mirror 11, you may use the semi-transmissive reflective member called a combiner. Moreover, although the motor of this embodiment was the DC motor 21 and the stepping motor 31, it may be a servo motor, for example. In the present embodiment, the worm gear is used. However, for example, a rack or pinion may be used.

Sectional drawing which shows embodiment of this invention. Sectional drawing which shows embodiment same as the above. Sectional drawing which shows the state which the reflection means of embodiment same as the above opened. The block diagram which shows the electric constitution of embodiment same as the above. The schematic block diagram of the head-up display which shows a prior art example. Sectional drawing which shows a prior art example same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Reflecting means 12 Holding member 12b Shaft part 20 1st drive means 200 1st drive mechanism 21 DC motor 30 2nd drive means 300 2nd drive mechanism 31 Stepping motor 35 Lever 40 Housing 41b Bearing part 60 Discharge member 60d Bearing part

Claims (3)

A display device for a vehicle that displays a virtual image by display light emitted from a display device,
Reflecting means supported in an openable / closable state to reflect the display light, driving means for opening and closing the reflecting means, a housing having an upper case and a lower case and housing at least the driving means, a bottom wall and a side wall a and a discharge member mounted on said casing,
It said reflecting means, said shaft portion is sandwiched bearing portion provided in the side wall of the discharge member and the bearing portion of the upper case is supported by the openable state Rutotomoni,
The discharge member allows the liquid to enter the housing so that the liquid that has entered the housing from the hole of the upper case formed in the vicinity of the shaft portion of the reflecting means does not get on the driving means. A display device for a vehicle, comprising a discharge unit for discharging .   The vehicle display device according to claim 1, wherein the reflection unit includes a reflection mirror that reflects the display light and a holding member that holds the reflection mirror.   The vehicle display device according to claim 2, wherein the holding member includes the shaft portion that is sandwiched between the discharge member and the housing.

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