JP4300575B2 - 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 device 2 with the reflection mirror 3 (see FIG. 14). . The reflection mirror 3 is attached to a holding member 4, and this 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. 15).
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 around 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 reflection mirror 3 can be rotated by driving the motor 7 by operating a push button switch (not shown).

  However, since the turning operation of the reflecting mirror 3 is fast so that the reflecting mirror 3 can be opened and closed quickly, the reflecting mirror 3 can be stopped at a desired angular position in the angle adjustment of the reflecting mirror 3. Had a difficult problem. That is, the reflection mirror 3 is opened and closed quickly so that the holding member 4 can be rotated about 60 ° within a predetermined time (for example, within 2 seconds) to open and close the reflection mirror 3. It was difficult to adjust the subtle angle.

  In order to solve this problem, for example, by providing another reduction gear between the gear 8 and the gear 6, it is conceivable to slow down the turning operation of the reflecting mirror 3, but the opening and closing operation of the reflecting mirror 3 is slow. This may cause a new problem that the reflection mirror 3 cannot be opened and closed within a predetermined time.

  Therefore, the applicant of the present application has proposed a vehicle display device including a first driving unit that opens and closes the reflecting unit and a second driving unit that adjusts the angle of the reflecting unit (Japanese Patent Application No. 2002-369934). ). Such a vehicle display device includes the reflecting means 10, the first driving means 20, the second driving means 30, and the housing 40 (see FIG. 16). The reflection means 10 includes a reflection mirror 11 that reflects display light emitted from the display and a holding member 12 that holds the reflection mirror 11.

  The first drive means 20 includes a first motor 21 and a first drive mechanism 200 including gears 22, 23 and the like that transmit the driving force of the first motor 21 to the reflection means 10, and the reflection means. 10 is opened and closed. The second driving unit 30 includes a second motor 31 and a second driving mechanism 300 including a cam 32, a frame member 33, a lever 35, and the like that transmit the driving force of the second motor 31 to the reflecting unit 10. And the angle of the reflecting means 10 is adjusted.

However, when the angle of the reflecting means 10 is adjusted by the second driving means 30 in the above-described display device for a vehicle, the first motor 21 of the first driving means 20 becomes a resistance, and the second driving There was a problem that the means 30 did not operate smoothly. That is, in order for the second drive mechanism 300 to operate and adjust the angle of the reflecting means 10, the gear 22 and the gear 23 must move, and the rotating shaft 21 a of the first motor 21 must also rotate. I must.
The present invention has been made in view of this problem, and provides a display device for a vehicle that can quickly open and close the reflecting means and can smoothly adjust the angle of the reflecting means.

In order to solve the above-mentioned problems, the present invention provides a reflection means 10 that is supported in an openable / closable state and reflects display light emitted from a display, and an angular displacement of the reflection means 10. And a first driving mechanism 200 that transmits the driving force generated by the first motor 21 to the reflecting means 10. The first motor 21 opens and closes the reflecting means 10. A driving means 20; a second motor 31 for angularly displacing the reflecting means 10; and a second driving mechanism 300 for transmitting the driving force generated by the second motor 31 to the reflecting means 10. and, a second drive means 30 for adjusting the angle of the reflection means 10, a vehicle display device wherein the first drive mechanism 200, the first having a first convex portion 25f The gear member 25 and the first convex portion A second gear member 26 having a second projecting portion 26e which receives the driving force of the first motor 21 from the first gear member 25 by contacting to 5f, and having a said first motor The first motor 21 is rotated so that the first convex portion 25f and the second convex portion 26e are separated from each other after the rotary shaft 21a of the 21 is rotated and the reflecting means 10 is opened. A control means 55 for rotating the shaft 21a in the reverse direction is provided .

  Further, according to the present invention, as described in claim 2, the detecting means 50 for detecting that the reflecting means 10 is opened at a predetermined angular position is provided.

  Further, according to the present invention, as described in claim 3, the second detecting means 51 for detecting that the reflecting means 10 is closed is provided.

Further, according to the present invention, as described in claim 4 , the control unit 33 rotates the rotation shaft 21 a of the first motor 21 in the reverse direction and closes the reflection unit 10. The rotating shaft 21a of the first motor 21 is rotated in the forward direction.

Further, according to the present invention, as described in claim 5 , the control unit 33 rotates the rotation shaft 21 a of the first motor 21 in the forward direction and opens the reflection unit 10. A drive signal for rotating the rotation shaft 21a of the first motor 21 in the reverse direction is output to the first motor 21. Subsequently , a stop signal for stopping the rotation shaft 21a of the first motor 21 is output. This is output to the first motor 21.

Further, according to the present invention, as described in claim 6 , the control unit 33 rotates the rotation shaft 21 a of the first motor 21 in the reverse direction and closes the reflection unit 10. A drive signal for rotating the rotation shaft 21a of the first motor 21 in the forward direction is output to the first motor, and subsequently , a stop signal for stopping the rotation shaft 21a of the first motor 21 is output as the stop signal. This is output to the first motor 21.

  When the angle of the reflecting means is adjusted by the second driving means, the first motor does not become a resistance, so that the second driving means operates smoothly.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In order to prevent the drawing from becoming complicated, in FIG. 1, the second drive means 30 is indicated by a dotted line and is not denoted by a reference numeral. Note that “rightward” or “leftward” in the present embodiment is a direction viewed from the side surface illustrated in FIGS. 1 to 3.

  The head-up display device includes a reflection means 10, a first drive means 20, a second drive means 30, a housing 40, a detection element 50 (detection means), a detection element 51 (second detection means), a discharge member 60, It comprises a light emitting display (not shown).

  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 depositing a reflective 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, which will 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 60, and the reflecting means 10 is supported in a rotatable state.

  The first drive means 20 has a direct current motor 21 (first motor) and a first drive mechanism 200 that transmits the drive force of the direct current motor 21 to the reflection means 10 (see FIG. 1). The first drive mechanism 200 includes a worm 24 fixed to the rotating shaft 21 a of the DC motor 21, a worm wheel member 25 (first gear member) meshing with the worm 24, and the worm wheel member 25 coaxially. And a gear member 26 (second gear member) arranged in a regular manner. The worm 24 has a tooth 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 (second motor) 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;

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 detection element 51 is composed of a limit switch or the like, and detects that the reflecting means 10 is closed when the base 12a comes into contact.

  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 in the forward direction, and the driving force of the DC motor 21 is transmitted to the holding member 12 via the first driving mechanism 200. The base 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 in the reverse direction, and the driving force of the DC motor 21 is transmitted to the holding member 12 via the first driving mechanism 200, so that the base 12a of the holding member 12 is obtained. However, it rotates clockwise while contacting the protrusion 35a of the lever 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 (see FIG. 3). 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.

Next, the worm wheel member 25 and the gear member 26 will be described in detail with reference to FIGS.
The worm wheel member 25 includes a base portion 25a and a boss portion 25b protruding to the rear surface side of the base portion 25a. The worm wheel member 25 is formed with a through hole 25c penetrating the base portion 25a and the boss portion 25b. (See FIG. 4). A tooth portion 25 d that meshes with the worm 24 is formed on the base portion 25 a of the worm wheel member 25. On the front side of the base portion 25a, a substantially fan-shaped concave portion 25e and a substantially triangular convex portion 25f (first convex portion) are provided.

The gear member 26 includes a base portion 26a, a plate-like portion 26b, and a shaft portion 26c (see FIG. 5). A tooth portion 26 d that meshes with the gear 23 is formed on the base portion 26 a of the gear member 26. A substantially trapezoidal protruding portion 26e (second convex portion) is formed on the rear surface side of the plate-like portion 26b when viewed in the axial direction. The shaft portion 26 c is provided on the rear surface of the plate-like portion 26 b and is inserted into the through hole 25 c of the worm wheel member 25.
When the shaft portion 26c of the gear member 26 is inserted into the through hole 25c of the worm wheel member 25, the convex portion 26e of the gear member 26 is positioned in the concave portion 25e of the worm wheel member 25 (see FIG. 6).

Next, based on FIG. 7 thru | or FIG. 8, the effect | action of the convex part 25f of the worm wheel member 25 and the protrusion part 26e of the gear member 26 when opening the reflection means 10 is explained in full detail.
When the reflecting means 10 is opened, the rotating shaft 21a of the DC motor 21 rotates in the forward direction, the worm wheel member 25 rotates to the right, and the convex portion 25f abuts against the protruding portion 26e of the gear member 26. The driving force is transmitted to the member 26 (see FIG. 7).

  When the reflecting means 10 is opened at a predetermined angular position, the rotating shaft 21a rotates in the opposite direction, the worm wheel member 25 rotates counterclockwise, and the convex portion 25f moves away from the protruding portion 26e of the gear member 26 (FIG. 8). reference). That is, the worm wheel member 25 is rotated counterclockwise in preparation for the reflection means 10 being closed, but is stopped at a predetermined interval B to the extent that it does not hinder the angle adjustment of the reflection means 10.

  When the convex portion 25f of the worm wheel member 25 is separated from the protruding portion 26e of the gear member 26, the gear member 26 is in a rotatable state. Therefore, when the angle of the reflecting means 10 is adjusted by the second drive mechanism 300, The DC motor 21 does not become a resistance. The predetermined interval B is preferably as small as possible, the change in driving sound when the reflecting means 10 is closed is small, and the convex portion 25f of the worm wheel member 25 is again in the protruding portion 26e of the gear member 26. Time lag until contact is small.

Next, based on FIG. 9 thru | or FIG. 10, the effect | action of the convex part 25f of the worm wheel member 25 and the protrusion part 26e of the gear member 26 when closing the reflection means 10 is explained in full detail.
When the reflecting means 10 is closed, the rotating shaft 21a of the DC motor 21 rotates in the reverse direction, the worm wheel member 25 rotates counterclockwise, and the convex portion 25f comes into contact with the protruding portion 26e of the gear member 26. A driving force is transmitted to the gear member 26 (see FIG. 9). When the reflecting means 10 is closed, the rotating shaft 21a rotates in the forward direction, the worm wheel member 25 rotates clockwise, and the convex portion 25f comes into contact with the protruding portion 26e of the gear member 26 again and stops (FIG. 10). reference).

FIG. 11 is a block diagram showing an electrical configuration for driving the DC motor 21 and the stepping motor 31.
Reference numerals 52, 53 and 54 denote push button switches, and these push button switches 52, 53 and 54 output operation signals to a control unit 55 (control means) such as a microcomputer. The push button switch 52 opens and closes the reflecting means 10, and the control unit 55 drives the DC motor 21 via the drive circuit 56 when an operation signal from the push button switch 52 is input.

  The push button switches 53 and 54 adjust the angle of the reflecting means 10. When the control unit 55 inputs an operation signal from the push button switches 53 and 54, the stepping motor 31 is turned on via the drive circuit 57. To drive. The push button switch 53 is for increasing the angle A of the reflecting means 10, and the push button switch 54 is for decreasing the angle A of the reflecting means 10. The detection element 50 outputs a detection signal to the control unit 55 when the reflecting means 10 is opened at a predetermined angular position. The detection element 51 outputs a detection signal to the control unit 55 when the reflecting means 10 is closed.

  When the operation signal from the push button switch 52 is input, the control unit 55 drives the DC motor 21 via the drive circuit 56 to open and close the reflecting means 10. Further, the control unit 55 drives the stepping motor 31 via the drive circuit 57 based on the operation signal from the push button switch 53 or the push button switch 54 to adjust the angle A of the reflecting means 10.

FIG. 12 shows an output processing flow of the control means 58 when the reflecting means 10 is opened.
When the operation signal from the pushbutton switch 52 is input, the control unit 55 first outputs a forward drive signal to the drive circuit 56 (step S1), and rotates the rotating shaft 21a of the DC motor 21 in the forward direction. The detection signal is input from the detection element 50 (step S2). When the detection signal is input, a reverse drive signal is output to the DC motor 21 via the drive circuit 56 (step S3). The moving shaft 21a is rotated in the reverse direction, and then a brake signal (stop signal) is output to the drive circuit 56 (step S4), thereby stopping the rotation of the rotating shaft 21a.

FIG. 13 shows an output processing flow of the control means 58 when the reflecting means 10 is closed.
When the operation signal from the pushbutton switch 52 is input, the control unit 55 first outputs a drive signal in the reverse direction to the drive circuit 56 (step S5), and rotates the rotating shaft 21a of the DC motor 21 in the reverse direction. The detection signal input from the detection element 51 is confirmed (step S6). When the detection signal is input, a forward drive signal is output to the DC motor 21 via the drive circuit 56 (step S7). The moving shaft 21a is rotated in the forward direction, and then a brake signal is output to the drive circuit 56 (step S8), and the rotation of the rotating shaft 21a is stopped.

  According to this embodiment, since the opening and closing and the angle adjustment of the reflecting means 10 are performed by the first driving means 20 and the second driving means 30, respectively, the reflecting means 10 can be quickly opened and closed. When the reflecting means 10 is opened at a predetermined angular position, the DC motor 21 rotates in the reverse direction, and the convex portion 25f of the worm wheel member 25 is separated from the protruding portion 26e of the gear member 26. Therefore, when the angle of the reflecting means 10 is adjusted by the second drive mechanism 300, the DC motor 21 does not become a load and the angle of the reflecting means 10 can be adjusted smoothly. .

  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. Moreover, although this embodiment uses a worm gear, for example, a rack or pinion may be used.

The side view which shows embodiment of this invention. The side view which shows embodiment same as the above. The side view which shows embodiment same as the above. The front view and sectional drawing of a worm wheel member which show embodiment same as the above. The side view and rear view of a gear member which show embodiment same as the above. Sectional drawing of the worm wheel member and gear member which show embodiment same as the above. Operation | movement explanatory drawing of the worm wheel member and gear member which show embodiment same as the above. Operation | movement explanatory drawing of the worm wheel member and gear member which show embodiment same as the above. Operation | movement explanatory drawing of the worm wheel member and gear member which show embodiment same as the above. Operation | movement explanatory drawing of the worm wheel member and gear member which show embodiment same as the above. The block diagram which shows the electric constitution of embodiment same as the above. The flowchart which shows the output processing of embodiment same as the above. The flowchart which shows the output processing of embodiment same as the above. The schematic block diagram of the head-up display which shows a prior art example. The side view which shows a prior art example same as the above. The side view which shows another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Reflecting means 20 1st drive means 200 1st drive mechanism 21 DC motor (1st motor)
21a Rotating shaft 30 Second driving means 300 Second driving mechanism 31 Stepping motor (second motor)
25 Worm wheel member (first gear member)
25f Convex part (first convex part)
26 Gear member (second gear member)
26e Protruding part (second convex part)
55 Control part (control means)

Claims (6)

Reflecting means that is supported in an openable and closable state and reflects display light emitted from the display;
A first motor for angularly displacing the reflecting means; and a first driving mechanism for transmitting the driving force generated by the first motor to the reflecting means, and the first motor for opening and closing the reflecting means. Driving means,
A second motor for angularly displacing the reflecting means; and a second driving mechanism for transmitting the driving force generated by the second motor to the reflecting means, and adjusting the angle of the reflecting means. A vehicle display device comprising: a second drive means;
The first drive mechanism receives a driving force of the first motor from the first gear member by contacting the first gear member having a first convex portion and the first convex portion. A second gear member having a second convex portion , and
After rotating the rotating shaft of the first motor to open the reflecting means, the rotating shaft of the first motor is separated from the first protruding portion and the second protruding portion. A display device for a vehicle, characterized in that it is provided with control means for rotating the motor in the reverse direction .   2. The vehicle display device according to claim 1, further comprising detection means for detecting that the reflection means is opened at a predetermined angular position.   The vehicle display device according to claim 2, further comprising second detection means for detecting that the reflection means is closed. The control means rotates the rotating shaft of the first motor in the forward direction after rotating the rotating shaft of the first motor in the reverse direction to close the reflecting means. The vehicle display device according to claim 1 . The control means rotates the rotation shaft of the first motor in the forward direction to open the reflection means, and then sends a drive signal for rotating the rotation shaft of the first motor in the reverse direction. 2. The vehicle display device according to claim 1 , wherein the vehicle display device outputs to the first motor, and subsequently outputs a stop signal for stopping the rotation shaft of the first motor to the first motor. The control means rotates a rotation shaft of the first motor in the reverse direction and closes the reflection means, and then sends a drive signal for rotating the rotation shaft of the first motor in the forward direction. 5. The vehicle display device according to claim 4 , wherein the vehicular display device outputs to the first motor, and subsequently outputs a stop signal to stop the rotation shaft of the first motor to the first motor.

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