JPH11176226A - Shading filter and vehicle instrument equipped with the same - Google Patents

Abstract

(57) [Problem] To provide a light-shielding filter that avoids restrictions on the design of a dashboard and prevents reflection of a window on an instrument panel, and a vehicle instrument equipped with the same. SOLUTION: A metal plate 1a having a black plating layer 1c on its surface is provided with a large number of fine through holes 1b or fine slits (not shown) which are arranged substantially uniformly in the metal plate 1a, and a light shielding filter for nighttime illumination light is provided. Let it be 1. The thickness of the metal plate,
Preferably, it is 0.1 to 1 mm, and the diameter of the fine through-hole or the width of the fine slit is preferably 0.1 to 1 mm.
１1 mm. Such a light-shielding filter is mounted on the front surface or the back surface of a light-transmitting dial, a front cover glass, and a warning lens to form a vehicle instrument.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light-shielding filter and a vehicle instrument equipped with the same, and more particularly, to a light-shielding filter for preventing nighttime illumination light of a vehicle instrument from being reflected on a windshield. The present invention relates to an instrument for a vehicle equipped with.

[0002]

2. Description of the Related Art Conventionally, in order to prevent nighttime illumination light of a vehicle instrument such as an automobile from being reflected on a windshield, a hood protruding forward is provided on an upper surface of the vehicle instrument, The cover is provided with a prism having a triangular cross section. FIG. 5 is an explanatory view of a vehicle instrument having such a hood, and FIG. 6 is an explanatory view of a vehicle instrument having such a prism having a triangular cross section on a front cover.

In FIG. 5, reference numeral 20 denotes a vehicle instrument. The vehicle instrument 20 includes a windshield 1 in front of the driver.
The display surface of the dial 12a is arranged on the dashboard 16 located below the vehicle 4 with the display surface facing the driver. The vehicle instrument 20 includes an instrument case 12b having a substantially U-shaped cross section, and a dial 12a is fitted in the case 12b. A pointer 12e is arranged on the front face of the dial 12a, and the pointer 12e is fixed to a pointer shaft 12f extending vertically through a through hole formed in the dial 12a.

When a signal is input to a circuit board 12d provided behind the dial 12a, the pointer shaft 12f is rotated by a movement 12c to move the pointer 12e to the dial 1e.
A character or the like corresponding to the signal on 2a is designated. A front cover 13 made of glass or the like for protecting the inside is provided on the front surface of the vehicle instrument 20. A hood 15 is provided on the upper surface of the vehicle instrument so as to protrude toward the driver.

As described above, when the hood 15 is provided on the upper surface of the vehicle instrument 20 so as to protrude toward the driver,
The optical axis A which is emitted from the display surface of the dial 12a and reflected by the windshield 14 located above and reaches the driver's viewpoint.
Is shielded by the hood 15, so that even if the dial 12a is illuminated at night or the like, the light hits the windshield 14 and enters the driver's eyes, and the display image is reflected on the window to prevent external visibility. Not be.

In FIG. 6, reference numeral 30 denotes a vehicle instrument. At the opening of the instrument case 12b of the instrument 30 for the vehicle,
The front cover 23 is fitted, and the front cover 23
The prism has a triangular cross section, and the prism apex angle θ is oriented downward, that is, the convex portion of the prism is oriented upward. The back surface 23a of the prism facing the dial 12a of the vehicle instrument 30 has a vertex angle θ of the prism.
And the surface 23b of the prism of the front cover 23 is formed on the surface of the dial 12a so that the display of the dial 12a does not form a virtual image. It is parallel to. 23c
Is a light-shielding film strip provided so as not to reflect light.

As described above, the dial 12 of the vehicle instrument 30 is
When the front cover 23 formed of a prism is disposed on the front surface of a, the optical axis A emitted from the dial 12a and reflected by the windshield 14 located above and reaching the driver's viewpoint is lower by the prism as shown by A '. Can be bent. For this reason, even if the dial 12a is illuminated at night or the like, the light hits the windshield 14 and enters the driver's eyes, and the display of the dial 12a is reflected on the window, so that the outside visibility is not prevented.

[0008]

The conventional instrument 20 for a vehicle shown in FIG. 5 has a problem that the hood 15 protrudes, so that the design freedom of the dashboard is lost. Further, in the conventional vehicle instrument 30 shown in FIG. 6, the prism vertex angle θ of the front cover 23 is
Because it cannot be made too large due to its structure,
Is increased by increasing the prism vertex angle θ.
Since the width becomes large, the height h from the dial 12a to the front cover 23 must be increased (about 60 mm is required), and as a result, the thickness of the vehicle instrument 30 increases, and space saving is not achieved. However, there is a problem that this is a limitation on the design of the dashboard 16.

The object of the present invention is to solve such a problem. That is, an object of the present invention is to provide a light-blocking filter for avoiding a restriction on the design of a dashboard and preventing a reflection of a window of a display of an instrument panel, and a vehicle instrument equipped with the same.

[0010]

According to a first aspect of the present invention, there is provided a light-shielding filter comprising a metal plate having a black plating layer on a surface thereof. A light-blocking filter provided with fine through holes or fine slits.

The second invention is characterized in that, in the first invention, the thickness of the metal plate is 0.1 to 1 mm, and the diameter of the fine through hole or the width of the fine slit is 0.1 to 1 mm. I have.

According to a third aspect of the invention, there is provided an instrument for a vehicle, wherein the light-shielding filter according to the first or second aspect is provided on a front surface or a back surface of the light-transmitting dial.

The fourth invention is a vehicle instrument characterized in that the light-shielding filter according to the first or second invention is provided on the front or back surface of the front cover glass.

According to a fifth aspect of the present invention, there is provided an instrument for a vehicle, wherein the light shielding filter according to the first or second aspect is provided on a front surface or a rear surface of a warning lens.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a light-shielding filter having a large number of fine through holes according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a light shielding filter. The light-shielding filter 1 is composed of a metal plate 1a having a black plating layer 1c on the surface, and the metal plate 1a has a large number of fine through holes 1b or fine slits (not shown) which are arranged substantially uniformly. have. Such fine through-holes and fine slits are formed by wet-etching a metal plate using, for example, a pattern made of a resist or the like as a protective mask. Such wet etching is a technique used in the manufacture of semiconductors and the like, and is well known in the art. As the metal plate, for example, a stainless plate is preferably used, but other metal plates may be used as long as the object of the present invention is not contravened. The black plating layer 1c is formed by black plating a metal plate before or after wet etching.

When the light-shielding filter 1 of the present invention is mounted on, for example, a front glass (not shown) of a vehicle instrument,
Assuming that the angle of the illumination light is α, the hole diameter of the fine through hole 1b or the width of the fine slit (not shown) of the light shielding filter 1 is t, and the thickness of the light shielding filter is a, the following equation (1) ) Can not pass through the fine through-hole, that is, cannot be transmitted to the windshield side.
There is no reflection on the windshield.

[0018]

(Equation 1)

For this purpose, the present invention preferably sets the thickness of the metal plate in the light-shielding filter to 0.1 to 1 mm.
And the diameter of the fine through-hole or the width of the fine slit is set to 0.1 to 1 mm. When such a light-blocking filter is used, it is necessary to consider the angle of the irradiation light applicable according to the above (1). .

FIGS. 2A and 2B are explanatory views showing a vehicle instrument in which a light-shielding filter is applied to the front and back surfaces of a light-transmitting dial, respectively, and FIGS. 3A and 3B.
FIGS. 4A and 4B are explanatory diagrams showing a vehicle instrument in which a light-shielding filter is applied to the front surface and the back surface of the front cover glass, respectively. FIGS. It is explanatory drawing which shows the instrument for vehicles which applied.

As shown in FIGS. 2A and 2B, the light-shielding filter 1 of the present invention can be provided on the front surface or the back surface of the light-transmitting dial 2 in a vehicle instrument. In the figure, 9 is a pointer, and 11 is a movement for rotating the pointer 9.

As shown in FIGS. 3A and 3B, the light-shielding filter 1 of the present invention can be provided on the front surface or the back surface of the front cover glass 3 in a vehicle instrument.

As shown in FIGS. 4A and 4B, the light-shielding filter 1 of the present invention can be mounted on the front surface or the back surface of a warning lens 7 in a vehicle instrument.
8 is a lamp housing. Irradiation light emitted from a lamp L provided on a lamp housing 8 is applied to a warning lens 7 provided on the dial 2.

According to the light-shielding filter of the present invention, by mounting the filter on the front or back surface of the light-transmitting dial, front cover glass and warning lens of the instrument for the vehicle,
The protruding hood provided in the conventional vehicle instrument can be eliminated or shortened, and the instrument can be thinned without the front glass composed of the prism of the conventional vehicle instrument, and Since it is possible to prevent the display of the instrument panel from being reflected in the window, it is possible to avoid limitations on the design of the dashboard.

According to the light-shielding filter of the present invention, a metal plate having a black plating layer on its surface is provided with a large number of fine through-holes or fine slits which are arranged substantially uniformly. Even if it is attached to the front or back of the glass and the warning lens, their opaque parts are so small that they are invisible, so the dial, the design of the warning lens, etc. have a small area hidden by the opaque parts. The display by those designs is hardly affected and does not hinder the driver from seeing it.

[0026]

According to the present invention, it is possible to provide an instrument for a vehicle which avoids limitations on the design of a dashboard and prevents a window of a display of an instrument panel from being reflected.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a light shielding filter having a large number of fine through holes according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a vehicle instrument in which a light-blocking filter is applied to the front and back surfaces of a light-transmitting dial, respectively.

FIG. 3 is an explanatory view showing a vehicle instrument in which a light-blocking filter is applied to the front and back surfaces of a front cover glass, respectively.

FIG. 4 is an explanatory view showing a vehicle instrument in which a light-blocking filter is applied to the front surface and the back surface of a warning lens, respectively.

FIG. 5 is an explanatory view of a conventional vehicle instrument having a hood.

FIG. 6 is an explanatory view of a conventional vehicle instrument having a prism having a triangular cross-section on a front cover.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield filter 1a Metal plate 1b Fine through hole 1c Black plating 2 Light transmissive dial 3 Front cover glass 7 Warning lens 8 Light box 9 Pointer 11 Movement L Light

Claims (5)

[Claims] 1. A light-shielding filter comprising a metal plate having a black plating layer on a surface thereof, wherein a large number of fine through holes or fine slits are provided substantially uniformly on the metal plate. Shading filter for night illumination light. 2. The thickness of the metal plate is set to 0.1 to 1 mm, and the diameter of the fine through hole or the width of the fine slit is set to 0.1 to 1 mm.
The light-shielding filter according to claim 1, wherein the thickness is set to mm. 3. A vehicle instrument comprising the light-shielding filter according to claim 1 provided on a front surface or a back surface of a light-transmitting dial. 4. An instrument for a vehicle, wherein the light-shielding filter according to claim 1 is provided on a front surface or a back surface of a front cover glass. 5. An instrument for a vehicle, wherein the light-shielding filter according to claim 1 is provided on a front surface or a rear surface of a warning lens.