JPS60216220A - Measuring instrument - Google Patents

Abstract

PURPOSE:To improve the visual inspection property by arranging a coloring section on the circumferential end face of a prism provided on the circumference side of the back of a dial plate while a pointer is opposed to the internal cut face of the prism with light sources facing the prism and the circumferential end face of the dial plate. CONSTITUTION:A prism 20 is arranged on the circumference side of the back of a transparent dial plate 40 having a character and a scale on the back thereof. An inclined reflecting surface 22 with an internal cut face 23 is provided on the end of the internal circumference of the prism and a coloring section is provided on the circumferential end face 21 thereof while a pointer 60 arranged on the back of the dial plate 40 faces the face 23. Then, a plurality of light sources 70 are arranged as opposed to the circumferential end face of the dial plate 40 through the prism 20 while irradiating the pointer 60 with that passing through the face 23.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to meters used in vehicles such as automobiles.

[Prior art]

Conventional pointer-type meters (mostly use dials printed on opaque or transparent materials, and because the pointers are placed on this dial, they are forced to display on a flat surface. In addition, it was not suitable for surface lighting, and visibility was not good.

[Purpose of the invention]

The present invention aims to improve visibility by providing a three-dimensional display using reflected light of colored light that has passed through a colored portion applied to the outer peripheral end face of a prism and an overlapping effect with the dial scale. .

〔Example〕

The present invention will be described below with reference to embodiments shown in the drawings.

In the figure, 10 is a pointer drive unit, 20 is a prism made of a transparent material that controls light, 30 is a dial plate made of opaque resin, 40 is a transparent resin dial plate with letters 42, scales 41, etc. printed on the back side, and 50 is a transparent resin dial plate with letters 42, scales 41, etc. printed on the back side. An opaque back panel that covers the pointer driving section 10, 60 a pointer with a triangular cross section which is rotated by the pointer driving section 10 in response to an external signal, and 70 a light source for night illumination. The dial plate 40 also serves as a front protection plate, and a dial plate 30 is placed in close contact with the outer periphery of the back surface of the dial plate 40. On the back side of the dial plate 30, up to the printed portion of the scale 41 of the dial plate 40. The prisms 20 are arranged in close contact with each other.

Further, a plurality of light sources 70 are arranged facing the prism 20 and the outer circumferential end surface of the dial 40, and the outer circumferential end surface 21 of the prism 20 has a colored portion of an arbitrary color such as green in order to color the illumination color. However, the color filters are attached by et al. An inclined reflective surface 22 is formed on the back side of the inner peripheral end of the prism 20, and is set so that the angle of incidence from the light source 70 and the angle of reflection of the front surface of the dial 40 toward the driver are the same. . Further, a pointer 60 is arranged on the back side of the dial 40 so as to face the inner cut surface 23 of the prism 20. Further, a light shielding plate 80 is provided around the outer peripheral end face of the prism 20 and the dial 40 including the periphery of the light source 70.
covered by.

As shown in FIG. 1, a prism 20 and letters 42,
By arranging a plurality of illumination light sources 70 around the panel outer periphery of the transparent dial 40 on which the scale 41 is printed, the light irradiated from the light sources 70 is transmitted to the outer peripheral end surface 21 of the prism 20.
After being colored by the coloring section, the scale 41 of the transparent dial plate 40 is irradiated through the prism 20. Furthermore, as shown in FIG. 3, it is possible to illuminate the pointer 60 with the light that has passed through the inner cut surface 23 of the prism 20. Further, the light emitted from the light source 70 is transmitted to the transparent dial plate 4.
The light also enters the dial 40 from the 0 end face, and illuminates the numeric characters 42 and scale 41 of the dial 40 with uncolored light.

This may make it possible to reduce the depth dimension, excluding the central portion, compared to conventional reflective vehicle instruments. Furthermore, uniform illumination is obtained and visibility is also improved. Furthermore, scale 41 and character 4
2 can be illuminated with different colored light, and visibility is further improved.

Note that the present invention is not limited to the above-mentioned embodiments, but can be implemented by the following embodiments.

The +t+i source 70 may be any type of fluorescent light, halogen lamp, etc., and is not limited to a light bulb.

(2) Although the cut surface 23 of the prism 20 has a rectangular shape when viewed from the front in FIG. 2, it is not limited to this, and may be any rectangular shape or circular shape.

〔Effect of the invention〕

As described above, the instrument according to the present invention enables simultaneous three-dimensional illumination of letters and scales, as well as back illumination and pointer illumination using the same light source, thereby improving visibility. It is also possible to reduce the depth dimension excluding the pointer drive section, which leads to improved mounting ease.

[Brief explanation of drawings]

FIGS. 1 and 2 are a vertical sectional view and a front view showing one embodiment of the meter of the present invention, and FIG. 3 is an enlarged sectional view of a main part of the above embodiment. 20... Prism, 21... Outer peripheral end surface, 22...
Reflective surface, 23... Inner circumference cut surface, 40... Dial plate,
41...Scale, 42...Character, 60...Pointer, 7
0...Light source. Representative Patent Attorney Takashi Okabe Figure 1 Figure 2 2 Figure 3

Claims (1)

[Claims] There is a dial plate made of transparent material with letters and scales on the back side, and a dial (IN
a prism having an oblique reflective surface, an inner cut surface, and a colored portion on an outer end surface; a light source disposed opposite the prism and the outer end surface of the dial;
and a pointer disposed on the back side of the dial facing the inner cut surface of the prism.