JP2977493B2 - Analog meter for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle analog maker suitable for displaying a tachometer or a speedometer of an automobile.
For the other.

[0002]

Conventionally, a display portion of this type of meter is as shown in FIG. 6, for example. The figure shows a tachometer, in which a scale 10a is arranged in an arc shape on the dial 10, and a pointer 20 rotates around a rotation center O in accordance with the engine speed to indicate the scale 10a. It is supposed to. Further, a predetermined warning zone of the scale 10a (6000 rpm in this example)
m), a warning area (red zone) 10b of red or the like is formed. When the pointer 20 enters the warning area 10b as shown in FIG. It shows that. The same applies to the speedometer.

[0003]

However, in this type of conventional meter, the warning area 10b is always visually recognized on the dial even if it is not in a warning state. Since this is indicated by the positional relationship with the region 10b, the driver actually only confirms the turning position of the pointer, and has a problem that the warning effect is weak.

[0004] It is an object of the present invention to improve the warning effect by effectively displaying that the indicated amount of the pointer has reached a predetermined warning zone in an analog meter for a vehicle. .

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an analog meter for a vehicle according to the present invention comprises a dial having a translucent circular window portion and a scale arranged on the outer periphery thereof. A disk-shaped pointer plate which is arranged concentrically with the circular window portion on the front face of the dial and a translucent slit is formed from the outer periphery toward the center, and is disposed behind the dial. A light source for illuminating the dial with backlight; a translucent warning color filter layer formed on a portion of the circular window corresponding to the warning zone of the scale; and a filter for the circular window.
The width of the circular window in the radial direction is
And a filter layer of a translucent cautionary color that changes gradually .

In the analog meter for a vehicle according to the present invention,
Irradiation light from the light source passes through the circular window of the dial, passes through a slit in the pointer plate, and the slit emits light as a pointer. The color of light passing through the circular window is the caution color.
The radial width of the circular part gradually increases due to the filter layer of
Changing portion becomes note color, the warning color by a filter layer of warning color at predetermined portions corresponding to the warning zones of the scale portion. Therefore, the slit rotates,
The part that emits the cautionary color when passing through the cautionary color filter layer
You can see the length changing and approaching the warning zone,
When it instruct the warning zone, the slit, Ru appears to emit light in the warning color.

[0007]

Embodiments of the present invention will be described below. FIG. 5 is a view showing a vehicular analog display device using the vehicular analog meter of the embodiment of the present invention. In the figure, reference numeral 1 denotes a vehicle analog meter of the embodiment, 2 denotes a prism made of transparent acrylic or the like, 3 denotes a total reflection spherical mirror, and the vehicle analog meter 1, the prism 2 and the spherical mirror 3 each include an instrument. It is housed in the panel 4. 5 is a handle column, 6 is a handle, and 7 is a windshield.

The vehicle analog meter 1 is arranged such that a display surface 1a for displaying a meter with a light-emitting dial and hands is directed downward and forward as described later, and is directed obliquely downward to the vehicle analog meter 1. In front of the optical path L of the display light,
A prism 2 and a spherical mirror 3 are provided. The display surface 1a of the vehicle analog meter 1 is set within the focal point of the concave reflecting surface of the spherical mirror 3, that is, at a position closer to the spherical mirror 3 than the focal point.

As shown by a dashed line in FIG. 1, the display light from the vehicle analog meter 1 enters the first interface 2a on the incident side of the prism 2 at right angles, and the second interface 2b of the prism 2 passes through the second interface 2b. When transmitted, the light is refracted like the optical axis l ₁ and is incident on the spherical mirror 3 at a substantially right angle.

On the other hand, by satisfying the spherical mirror 3, reflection condition, the optical axis l ₂ which forms a slight angle incident light and the optical axis l ₁
And the reflected light beam is directed to the second interface 2b. The reflected light is directed is reflected in the direction of the viewpoint E of the optical axis l ₃ in the second interface 2b, the virtual image X is viewed as the display image when viewed this viewpoint E and its vicinity.

In the display device according to this embodiment,
The virtual image X is displayed at a distance by reciprocating the optical path between the prism 2 and the spherical mirror 3, and the focal point shift amount of the eye even when the driver is gazing at the front view of the windshield 7 such as during traveling. , So-called distant display is performed.

The apex angle θ of the prism 2 and the positional relationship between the prism 2 and the viewpoint E are set such that the first interface 2a in the prism 2 becomes a total reflection surface with respect to light rays in the line of sight from the viewpoint E. In addition, the third interface 2c of the prism 2 is subjected to a dark-color coating process for absorbing light. For this reason, when the second interface (reflection surface) is desired from the viewpoint E, the prism 2
Whole is visible in the dark, the display images by the virtual image X is that has become a high-contrast, which was a dark background.

FIG. 3 is a sectional view of the vehicle analog meter 1 of the embodiment, and FIG. 4 is an exploded perspective view thereof. In the figure, 1
Reference numeral 1 denotes an internal meter unit for rotating the pointer shaft 11a in response to an electric signal input from a circuit (not shown), and the internal structure thereof is the same as that of a conventionally known analog meter.
Reference numeral 12 denotes a case body arranged on the front surface of the meter shaft 11 on the side of the pointer shaft 11a. Reference numeral 13 denotes a reflector housed in the case body 12 and having a cylindrical concave reflecting surface 13a facing the opening side of the case body 12. Reference numeral 14 denotes a cold cathode tube arranged along the focal point f of the reflector 13, and the cold cathode tube 14 is connected to an external power supply via a socket 15 and a lead wire (not shown) drawn from the case body 12, It constitutes a high output light source. Since the reflector 13 forms a concave mirror by the cylindrical concave reflecting surface 13a, the focal point f becomes linear as shown in FIG.

Reference numeral 16 denotes a light diffusing plate provided so as to cover the opening of the case body 12, 17 denotes a dial disposed on the front of the light diffusing plate 16, and 18 denotes a dial disposed on the front of the dial 17. The center of the pointer plate 18 is a pointer shaft 11.
a.

FIG. 1 is a front view showing a dial 17 and a pointer plate 18. FIG. 1A shows a part of the dial 17 (a part of a tachometer), and FIG. 18 are shown. As shown in FIG. 7A, a black face surface 17a (shaded portion) is formed on the dial 17 by a black printing process or the like on a transparent resin plate, and the scale 17b is outlined. .

The scale 1 of the black face 17a
A circular window portion 17c that has not been subjected to a black printing process is formed on the inner peripheral side of 7b, and a part of this window portion 17c includes:
The filter layer 17d is formed of a red light transmissive ink, which is color-coded in a fan shape spreading from the center from "6" to "8" of the scale 17b. The filter layer 17d may be configured to adhere a red light-transmitting film. Further, except for the filter layer 17d of the window 17c
In the part of the filter layer 17d from the position of the number "0"
Yellow second fill that gradually widens radially to the edge
The data layer 17f is formed.

As shown in FIG. 2B, the pointer plate 18 has a black face 18a (shaded portion) formed by a black printing process on a disk-shaped transparent resin plate, and has a radius from the vicinity of its center. The light-transmitting slit 18b is formed by not printing partly in the direction.
8b serves as a pointer.

By the way, in general, in the case of a vehicle-mounted analog meter, the scale is not formed on the entire circumference, but is formed in a clockwise range of about 8:00 to 4:00 on a clock face.

The scale 17b of the dial 17 of this embodiment is also
As shown in FIG. 1A, the center of the pointer plate 18 is set at a position displaced by a fixed distance d below the center P of the height H of the scale 17b without being formed on the entire circumference as shown in FIG. . Also,
As shown in FIG. 3, the position of the optical axis of the reflecting surface 13a of the reflector 13 substantially coincides with the approximate center P of the height H of the scale 17b.

Then, corresponding to the center of the pointer plate 18,
The dial 17, the light diffusion plate 16, the reflector 13, and the case body 12 have small holes 17 e, 16 a, and 13.
B and 12a are formed respectively, and the pointer shaft 11a passes through each of the shaft holes 12a, 13b, 16a and 17e and is directed toward the center of the pointer plate 18 under the cold cathode tube 14.

With the above structure, the light from the cold cathode tube 14 is diffused by the light diffusion plate 16 and the light traveling toward the reflector 13 is reflected by the reflection surface 13a as substantially parallel light, and is diffused by the light diffusion plate 16. . Then, uniform and bright light (backlight) is irradiated behind the dial 17 via the light diffusion plate 16, and the scale 17b emits light. The light transmitted through the window 17c of the dial 17 becomes a back light with respect to the pointer plate 18, and the slit 18b emits light. Therefore, when the pointer plate 18 is rotated by the meter inner machine 11, analog display is performed using the illuminating pointer (slit 18b) and the scale.

When the slit 18b is between "0" and "6" on the scale, the filter layer 1 of the window 17b
Light from the portion other than 7 d is transmitted through the slit 18b.
In other words, as shown in FIGS. 2A to 2C , the slit 18b has a portion other than the filter layer 17f.
6 emits white light, and the slit 18b has the number “0”.
From the "0" of the slit 18b
As the angle increases, the slit 1 is formed by the filter layer 17f.
The yellow part (the shaded part in the figure) that emits light in 8b is longer.
Thus, a state near the warning zone can be visually recognized. And
When the slit 18b is between "8" to "6" of the scale, since the red light through the filter layer 17e of the window 17d is transmitted through the slit 18b, as shown in FIG. 2 (d), The slit 18b emits red light, and a warning display indicating that the rotation speed is high is performed. In this way, the meter display
In the warning zone, the slit 18b itself, which is a pointer, is red.
Since the light is emitted in a warning color such as a color, the warning effect is enhanced.

Although the above embodiment is applied to a reflection type vehicle analog display device using a prism or the like, the vehicle analog meter of the present invention can also be used as a direct view type display device.

[0024]

As described above, according to the vehicular analog meter of the first aspect of the present invention, the pointer formed by the translucent slit is illuminated by the back light transmitted through the circular window of the dial. , to form a filter layer warning color of a translucent part of the circular window portion corresponding to the warning zone of the graduation
In both cases, the circle other than the filter layer
Be careful with the translucency in which the radial width of the shape window gradually changes
Since the color filter layer is formed , when the indicated position is in the warning zone, the slit, that is, the pointer itself emits a warning color such as red, and the slit reaches the warning zone.
The cautionary color emitted by the pointer itself when rotating is long
And you can see how close to the warning zone
And the warning effect increases.

[Brief description of the drawings]

1 is a front view showing a dial and pointer plate of the vehicle analog meter of the embodiment of the present invention.

FIG. 2 is a diagram showing a display example in the embodiment.

FIG. 3 is a cross-sectional view of the vehicle analog meter of the embodiment.

FIG. 4 is an exploded perspective view of the analog meter for a vehicle according to the embodiment.

5 is a diagram showing an analog display device for a vehicle using the vehicular analog meter embodiment.

FIG. 6 shows an example of a display unit of a conventional analog meter for a vehicle .
FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 13 Reflector 14 Cold-cathode tube 16 Light diffusion plate 17 Dial 18 Pointer plate 17a, 18a Black face 17b Scale 17c Window 17d , 17f Filter layer 18b Slit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-238016 (JP, A) JP-A 2-81418 (JP, U) JP-A 50-13647 (JP, U) JP-A 47- 31737 (JP, U) Japanese Utility Model Showa 47-3571 (JP, U) Japanese Utility Model Showa 57-122517 (JP, U) Japanese Utility Model Showa 55-26403 (JP, U) Patent 110976 (JP, C1) (58) Survey Field (Int.Cl. ⁶ , DB name) G01D 7/00

Claims (1)

(57) [Claims] 1. A dial having a translucent circular window and a scale disposed on the outer periphery thereof, and a dial disposed concentrically with the circular window at a front surface of the dial and having a translucent property. A disk-shaped pointer plate having a slit formed from the outer periphery toward the center, a light source arranged behind the dial and illuminating the dial with backlight, and a warning zone of the scale on the circular window portion. A light-transmitting and warning color filter layer formed on a corresponding part, and the circular window part is formed on a part other than the filter layer by the circle.
Be careful with the translucency in which the radial width of the shape window gradually changes
An analog meter for a vehicle , comprising: a color filter layer .