JP2531255Y2 - Vehicle instrument - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for a black-face instrument in which a black face is displayed when an ignition switch is turned off and a black surface is illuminated by turning on the ignition switch.

[0002]

2. Description of the Related Art A known example of a conventional black face instrument for a vehicle is shown in FIG. That is, reference numeral 1 denotes an instrument. Inside the instrument 1, an instrument machine 2, a pointer 5 attached to a pointer shaft 3 of the instrument machine 2, and a fluorescent tube 4 illuminated and displayed, a transmitted light A support 8 having a dial 6 of a type and a fluorescent lamp 7 for illuminating the dial 6 with transmitted light
In addition, a translucent front cover 9 that looks black in reflected light and has a transmittance of 30 to 70%, for example, is mounted in front of the indicator 8. Note that 10
Is an inverter for turning on the fluorescent lamps 4 and 7. In this black face instrument, when the fluorescent lamp 4 and the fluorescent lamp 7 are not turned on, that is, when the ignition switch is turned off, there is no transmitted light. It looks black (smoke-like) due to external reflected light, and nothing is visible. However, when the ignition switch is turned on and the fluorescent lamps 4 and 7 are turned on, the hands 5 emit light, and when the dial 6 is illuminated by transmission, the illumination is transmitted through the front cover 9 and the indicator 8 of the indicator 8 is turned on. The display status is visible.

[0003]

As described above, the use of a high-luminance fluorescent tube in the pointer 5 not only increases the cost but also increases the size of the pointer 5 and the shape and mechanism. This causes a problem that the target balance is deteriorated, and the width of the pointer 5 is widened and the pointing property is deteriorated. Also
Preset in front of the instrument to make it a blackface instrument
When the prism plate is arranged, the refraction of light by this prism plate
Depending on the application, the rotation position of the pointer
Depending on the position of the point, the thickness of the hand
If the display thickness is changed by the pointer and the visibility is impaired,
There was also a problem.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem.
Uses a prism plate that has a sawtooth cross section so that extraneous light that is incident diagonally from above and directly illuminates the instrument's front cover can be shielded, and that only the upper inclined surface is subjected to non-reflection and non-transmission processing. In particular, it is intended to prevent the black face effect from being hindered by direct sunlight and to provide an effective black face when the indicator is not energized.

A second object is, in a light-emitting pointer that is used in the black face meter is that by omitting the use of fluorescent tubes increase the economic efficiency and operating characteristics, also forms a plane emitting the light emission guidelines, prisms Light refraction by plate
Display width does not change even if there is
Accordingly, it is an object of the present invention to provide a black face instrument capable of improving the indication characteristic and the visibility of the indicated value.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in FIGS.

In FIG. 2, reference numeral 11 denotes an instrument, in which an indicator 12 is provided.
The indicator 12 is composed of an indicator body 13, a pointer 15 attached to a pointer shaft 14 expended by the indicator body 13, and a transmitted light dial 1.
6, a light bulb 17 for causing the dial 16 and the pointer 15 to emit light, and a light guide 18 for guiding the light to the pointer 15. Reference numeral 19 denotes a semi-transmissive prism plate attached to the front portion of the indicator 12. This prism plate 19 has a sawtooth-shaped unevenness formed on the front surface thereof in parallel in the horizontal direction. As shown in FIG. 3, a black non-reflective light-shielding layer 20
Is given. Reference numeral 21 denotes a transmission surface which is a downward inclined surface of the front surface of the prism plate, and reference numeral 22 denotes a transparent front cover attached to the front of the prism plate 19.

Next, the structure of the pointer 15 will be described with reference to FIGS. 4 and 5. The main body 15-1 of the pointer 15 is formed of a transparent resin which receives light from the light bulb 17 and emits light. The pointer 15 of the pointer body 15-1
-2 The cross-sectional shape is the back surface 15-
3 is a trapezoid having a width larger than the surface 15-4 opposed to the prism plate 19, and the inclined surfaces 15 on both sides of the trapezoid are formed.
-5, a reflective layer 15-6, which is a chrome foil, is formed, and a black light-shielding layer 15- is formed on the surface of the reflective layer 15-6.
7 is given. 15-8 is a colored transmission layer provided on the surface 15-4.

[0009] Next will be described operation of the above structure, when the first described reflection effect of external light by the prism plate 19, as is clear in the enlarged view of FIG. 3, the direct light B emitted from the obliquely upward transmission surface After being reflected by 21, the direct light B that is shielded by the non-reflective light-shielding layer 20 and directly radiated to the non-reflective light-shielding layer 20 is almost directly shielded by the light-shielding layer 20, so that most of the external light Since the light does not pass through the prism plate 19, there is no reflection of the indicator 12 by extraneous light, and the black face can be maintained.

Next, when the indicator 12 is illuminated and displayed,
The display light of the indicator 12 is transmitted from the back surface of the prism plate 19 toward the front surface, and enters the driver's eye point 23.
The display light at this time is transmitted through the prism plate 19,
The light is refracted by the saw-toothed inclined surface, that is, the transmission surface 21, and enters the eye point 23. Since the display of the incident light beam incident on the eye point 23 is most visible when it is parallel to the driver's viewing direction, the refraction indicating light beam emitted from the prism plate 19 is in the driver's viewing direction. Since the angle of incidence of the incident light beam received by the prism plate is adjusted so as to be parallel to the prism plate, that is, the inclination of the display surface of the indicator 12 is set in advance, the display of the indicator viewed through the prism plate 19 becomes It looks very sharp and enhances visibility.

In the pointer 15, the pointer 15-2 which emits light upon receiving the light from the bulb 17 has a trapezoidal cross section, and the surface 15-7 has a narrow width. Since the light-shielding layer is formed on the inclined surfaces on both sides thereof, the light-emitting display portion 15-4 of the pointer 15 has a narrow width, thereby improving the indication characteristics and visibility of the indicated value by the light-emitting pointer. In other words, because the pointer is thick,
When the hands are emitting light, the thickness of the hands
Light from both sides and the front
To provide the prism plate 19
Therefore, the refraction of light by the prism plate 19 acts,
Rotation position of the pointer and visual direction position from eye point
Especially when the pointer is positioned horizontally.
The front of the pointer and one side of the pointer are visible at the same time,
As a result, the light emission guidelines and the thickness of the light emission display have changed.
This causes a sense of incongruity such as difficulty in reading the pointer. There
In order to eliminate the discomfort of
Applies a light-shielding layer to both inclined surfaces of the pointer 15,
With a flat light emission display
Even if it is in a certain position,
Make sure that the display always emits light with a stable thickness.
It increases the recognition.

[0012]

[Effect of the invention] As described above, the present invention is a self-luminous type pointer unit.
And analog instruments 12 having, disposed in front of the instrument
And its cross-sectional shape is a sawtooth shape, and its upwardly inclined surface
A combination of a semi-transmissive prism plate 19 formed by subjecting the non-reflective light-shielding layer 20, the cross-sectional shape of the pointer part, backside 15-3 facing the dial 16, the prism plate 1
9 is a trapezoid having a width larger than that of a surface 15-4 facing the light-emitting device 9; a luminescent color foil 15-8 is provided on the surface 15-4; −
7 is applied to the vehicle.
When the dual-purpose instrument is not displayed, the black face effect is large. Further, in the pointer 15, the pointer 15-2 which receives light from the light bulb 17 and emits light has a trapezoidal cross-sectional shape, and its surface 15-4 has a narrow width. Since the light-shielding layer is provided on the inclined surfaces on both sides, the luminescent display by the hands 15 is displayed on the surface 1 of the hands 15.
It becomes a flat narrow display by only 5-4, and therefore,
Whatever angle you look at the flash pointer,
The pointer's emission width looks constant
From this, the visual confirmation of the indicated value by the light emitting pointer
There is an effect that the visibility is enhanced without causing a sense of discomfort .

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a conventional meter.

FIG. 2 is a configuration explanatory view showing an embodiment of the meter according to the present invention.

FIG. 3 is an enlarged view of a main part of the embodiment.

FIG. 4 is an enlarged explanatory view of a pointer portion of the embodiment.

FIG. 5 is an enlarged sectional view of a pointer portion of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Instrument 12 ... Indicator 13 ... Indicator machine body 14 ... Pointer shaft 15 ... Pointer 16 ... Transmitted light dial plate 17 ... Light bulb 18 ... Light guide 19 ... Prism plate 20 ... Non-reflective light shielding layer 21 ... Transmission surface 22 ... front cover 23 ... eye point

Claims (1)

(57) [Scope of request for utility model registration] 1. An analog instrument (12) having a self-luminous type pointer, and disposed in front of the instrument and having a sectional shape.
It has a sawtooth shape, and the anti-reflection light-shielding layer (2
0) formed by subjecting a set of the semi-transmissive prism plate (19)
Consists combined, cross-sectional shape of the pointer part is dial (1
The back surface (15-3) opposed to 6) is a trapezoid having a width larger than the surface (15-4) opposed to the prism plate (19), and the front surface (15-4) has a luminescent color foil. (1
5-8), and both sides of the trapezoid (1)
An instrument for a vehicle, wherein a light-shielding layer (15-7) is applied to 5-5).