JP2996107B2 - Instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instrument, and more particularly, to a vehicle having a pointer that emits light by light from a light emitting element, a dial that emits light by light from a lamp, and smoke glass that covers the pointer and the dial. It relates to an instrument such as a speedometer for use.

[0002]

2. Description of the Related Art A meter of this type uses a low transmittance of smoked glass so that a pointer and a dial cannot be seen from the outside when a light-emitting element and a lamp are not supplied with power. Regardless of the lighting, the pointer and the dial are distinguished from each other when they are lit.

[0003]

However, since the luminous intensity of the light emitting element and the lamp is limited, the transmittance of the smoked glass is also limited. Therefore, when the external light is strong, the external light can reduce the smoked glass. As a result, the pointer and the dial are seen from the outside, and there is a problem that it is difficult to make full use of the above features.

An object of the present invention is to solve the above-mentioned problems and to provide an instrument which can make full use of its features by preventing the hands or dial from being seen from the outside even when the external light is strong. With the goal.

[0005]

SUMMARY OF THE INVENTION An instrument according to the present invention comprises an indicator that emits light by light from a light emitting element, a dial that emits light by light from a lamp, and smoked glass that covers the pointer and the dial. in, a peak wavelength of either one or both of the surface reflection characteristics of the pointer or dial, characterized in that it is configured to match the wavelength of low transmittance of the smoked glass.

[0006]

[0007]

[0008]

[0009]

In the instrument of the present invention the action of the present invention, the peak wavelength of either one or both of the surface reflection characteristics of the pointer or the dial is because it is consistent with the wavelength low transmittance of smoked glass, in the vicinity of the peak wavelength guidance for the ambient light component, transmitted through the smoked glass amount is less to reach the hands or dial in, also for the external light component out of the vicinity of the peak wavelength, even if a lot amount of light passing through the smoke glass Or it is not reflected on the surface of the dial.

[0010]

[0011]

[0012]

[0013]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows the configuration of an instrument according to one embodiment.

In FIG. 1, 1 is a pointer, 2 is a dial, 3
Represents smoked glass.

The pointer 1 is a transparent resin molded product made of polycarbonate, acrylic resin or the like. A colored surface 4 (FIG. 2) colored with a hot stamp or the like is provided on the lower surface of the pointer 1. A specific wavelength reflection layer 5 (FIG. 2) formed by printing, vapor deposition, sputtering, or the like is provided on the upper surface and both side surfaces of the pointer 1. Guideline 1
A light emitting element 6, for example, an LED or a lamp is disposed on the base 1a. The light emitting element 6 emits the hands 1 by irradiating the colored surface 4 on the lower surface of the hands 1. The base 1a of the pointer 1 is connected to the shaft 9 of the inner unit 8 attached to the white case 7, and the pointer 1 is rotated by the inner unit 8.

The dial 2 is configured as shown in FIG. 3 or FIG. The dial 2 shown in FIG. 3 is a substrate 2 formed of a transparent resin such as polycarbonate or acrylic.
1, a specific wavelength reflective layer 22 formed on the upper surface of the substrate 21 by printing, vapor deposition, sputtering, or the like, and a black layer 23 formed on the upper surface of the specific wavelength reflective layer 22 by printing or the like. On the other hand, the dial 2 shown in FIG. 4 includes a substrate 21 formed of a transparent resin such as polycarbonate or acrylic, a black layer 23 formed on the upper surface of the substrate 21 by printing or the like; And a specific wavelength reflection layer 22 formed by printing, vapor deposition, sputtering, or the like.

A diffusion plate 10 is provided on the back surface of the dial 2. The diffusion plate 10 is made of a resin such as polycarbonate, and is fixed to the dial 2 by heat staking or the like. The diffusion plate 10 is a lamp 1 provided in the case 7.
The light from the light source 1 is diffused to irradiate the dial 2 from the back side. The lamp 11 includes a xenon lamp, a cold cathode tube, or the like.

The smoked glass 3 comprises a pointer 1 and a dial 2
Is fixed to the black dial plate 12 or the case 7 so as to cover. The smoke glass 3 is formed of a transparent resin such as acrylic or polycarbonate. The smoke glass 3 is set in advance so as to have a spectral characteristic of a relationship between wavelength and transmittance as shown in FIG. 5, FIG. 6, or FIG.

Next, the relationship between the specific wavelength reflecting layers 5 and 22 of the hands 1 and the dial 2, the smoke glass 3, the light emitting element 6 and the lamp 11 will be described with reference to FIGS.

As shown in FIG.
m, the transmittance becomes about 30%, and at a wavelength of 400 nm or less, the transmittance decreases proportionally as the wavelength decreases.
When the smoked glass 3 is formed so that the transmittance increases proportionally with the wavelength at 0 nm or more, only the light near the wavelength of 200 nm where the transmittance of the smoked glass 3 has a low value is reflected, in other words, the reflection peak. Wavelength 2
The specific wavelength reflection layers 5 and 22 are formed so as to be near 00 nm. The light emitting element 6 and the lamp 11 each have an emission wavelength within a range of 400 to 700 nm.

With this configuration, the wavelength becomes 4
For external light components of 00 nm or less, the reflectance of the specific wavelength reflection layers 5 and 22 is high, but the transmittance of the smoked glass 3 is low, and the pointer 1 is transmitted through the smoked glass 3.
Hand 1 because the amount of external light reaching the dial 2 is small.
And the dial 2 is difficult to see from the outside. On the other hand, if the wavelength is 40
For an external light component of 0 nm or more, the specific wavelength reflection layer 5,
Since the reflectance of the reference numeral 22 is 0%, the hands 1 and the dial 2 are not visible from the outside. Therefore, even when the external light is strong at the time of turning off the light, the hands 1 and the dial 2 are hardly visible from the outside. At the time of lighting, as described above, the reflection peak wavelength of each of the specific wavelength reflecting layers 5 and 22 is around 200 nm,
In addition, each light emission wavelength of the light emitting element 6 and the lamp 11 is 400
Since the wavelength is within the range of about 700 nm, the specific wavelength reflecting layers 5 and 22 do not prevent the hands 1 and the dial 2 from emitting light.

On the other hand, as shown in FIG.
When the smoke glass 3 having a low transmittance of about 20% in the vicinity is formed, the specific wavelength reflection layers 5 and 22 are formed so that the reflection peak wavelength is around 500 nm.

With this configuration, as in the case shown in FIG. 5 described above, even when the external light is strong when the light is turned off,
The hands 1 and the dial 2 are difficult to see from the outside.

[0025]

[0026]

Although not shown, as another embodiment, the specific wavelength reflecting layers 5 and 22 are eliminated, and the hands 1 and the dial 2 themselves are made of a material having a characteristic of reflecting a specific wavelength. You may do so.

[0028]

According to the instrument of the present invention, even if strong external light unlit, guidelines or dial is hardly visible from the outside, it is possible to utilize the features of the instrument sufficiently.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an instrument according to an embodiment.

FIG. 2 shows the structure of a pointer, and FIG. 2 (A) is a side view, FIG.
(B) is a sectional view taken along the line BB in FIG.

FIG. 3 shows the structure of the dial, FIG. 3 (A) is a front view, and FIG. 3 (B) is a sectional view taken along line BB of FIG. 3 (A).

FIG. 4 is a sectional view of a dial according to another embodiment.

FIG. 5 is a graph showing the relationship between the transmittance of smoked glass and the reflectance of a specific wavelength reflection layer.

FIG. 6 is a graph showing the relationship between the transmittance of smoked glass and the reflectance of a specific wavelength reflective layer according to another example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pointer 2 Dial 3 Smoke glass 4 Colored surface 5,22 Specific wavelength reflective layer 6 Light emitting element 11 Lamp

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) G01D 13/28 G01D 11/26 G01D 11/28

Claims (2)

(57) [Claims] 1. An instrument having a pointer that emits light by light from a light-emitting element, a dial that emits light by light from a lamp, and smoked glass that covers the pointer and the dial, wherein one of the pointer and the dial is provided. An instrument wherein a peak wavelength of one or both surface reflection characteristics is set to match a wavelength having a low transmittance of the smoked glass. Wherein said surface reflection characteristics, the instrument according to claim 1, characterized in <br/> be more set to a specific wavelength reflecting layer provided on the surface of the pointer or dial.