JPS5932887Y2 - Vehicle instrument lighting system - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lighting device for speedometers and other equipment installed in vehicles, and in particular, it is an illumination device that achieves even and efficient indirect illumination using a conventional facing board, as well as pointer illumination at the same time. The object of the present invention is to provide an illumination device in which a light guide can be easily assembled to the illumination position of an instrument.

Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings.

Both the instrument mechanism 1 and the illumination mechanism 2 are housed in a case 3, and a pointer shaft 4 protrudes from the instrument mechanism 1, and a pointer 5 is provided extending from the top of the pointer shaft 4 in a direction orthogonal thereto.

The dial 6 is installed in the instrument mechanism 1 below the pointer 5 and substantially parallel to it, with the pointer shaft 4 inserted through the middle thereof.

The light guide 7 is integrally formed with a flange 8 that protrudes inwardly within the rotation plane of the pointer 5 and a flange 9 that protrudes outward within the rotation plane of the pointer 5 at its upper end. An annular groove 11 having a reflective surface 10 that more actively guides light rays toward the tip side of the pointer 5 is formed at the upper end in the extending direction.

In addition, the light guide 7 has a ring-shaped elastic packing 1 on a flange 12 that has a flange 9 formed outward on the periphery of the opening of the case 3.
On the upper plane of the light guide 7, an annular facing plate 14 whose surface is colored in a similar color to the ground color of the dial plate 6 is disposed, and a glass plate 15 is fastened to the case 3 by a caulking ring 17 so as to fit into the inner circumferential groove of the waterproof gasket 16 and close the opening of the case 3.

That is, in the above configuration, the irradiated light beam from the illumination mechanism 2 is incident on the light guide 7, and the light beam reflected toward the collar portion 8 side by the reflective surface 10 formed in the annular groove 11 at the upper end is reflected by the pointer 5.
The pointer 5 is effectively irradiated over the entire rotation range of the pointer 5.
can be brightened.

In particular, if the pointer 5 is made of a transparent material, the irradiation light beam can be well introduced into the pointer 5 from its tip, and the pointer 5 can shine more clearly.

Further, the light beams incident on the light guide 7 and refracted and reflected on the inner surface are irradiated from the inner peripheral surface on the dial 6 side, and illuminate the surface of the dial 6.

%, the light rays totally reflected on the lower reflective surface of the facing plate 14 are emitted over a wide range by the rough surface formed on the light emitting surface of the collar 8,
To uniformly illuminate the surface of a dial 6.

Therefore, the surface of the dial 6 is reflected by the outer surface of the inner circumference of the light guide 7, and combined with the light that passes through the gap between the dial 6 and the light guide 7, the entire surface is brightly illuminated.

In this way, the irradiated light from the illumination mechanism 2 is guided to the front side of the instrument through the light guide 7, and is reflected to the dial 6 side by the facing plate 14, thereby illuminating the pointer 5 and the dial 6 evenly and uniformly. This makes it possible to achieve bright instrument illumination with excellent visibility that cannot be achieved with conventional indirect illumination using only a facing plate.

In addition, the light guide 7 has a flange 9 formed to protrude outward, which is connected to the case 3.
It has a simple configuration that is simply placed on the flange 12 of the case 3 via the elastic Harakin 13, and can be fixed extremely easily.A conventional facing plate can be attached to the inner wall of the case 3 without providing a special support part. It can be easily assembled and configured without affecting workability in any way.

In other words, regardless of whether the material of the case 3 is metal or synthetic resin, the light guide 7 can be simply attached to each one without having to worry about forming a supporting part or being restricted by the size or shape of the instrument. By simply forming a size and shape suitable for each instrument to be mounted and providing an outwardly protruding flange 9, it can be extremely easily placed and fixed at the instrument illumination position.

This does not change the size or shape of the instrument,
Furthermore, it is possible to provide an inexpensive illumination device with high practical value, which has excellent effects that can be immediately applied to conventional meters without impairing the appearance of the front surface of the meter.

[Brief explanation of drawings]

Fig. 1 is a plan view showing one embodiment of the present invention, and Fig. 2 is a plan view showing an embodiment of the present invention.
FIG. 3 is an enlarged sectional view of the second fixed portion. Instrument mechanism: 1, lighting mechanism: 2, case: 3, pointer = 5,
Dial = 6, light guide near, flange: 8, 9, flange = 1
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Claims (1)

[Scope of utility model registration request] The instrument mechanism and the lighting mechanism are housed in a case, and a dial is installed below and almost parallel to the pointer attached to the pointer shaft of the instrument mechanism, and the irradiated light from the lighting mechanism is guided to the dial. Alternatively, in an instrument illumination device in which a light guide made of a transparent material capable of illuminating the pointer is provided on the outer periphery of the dial, the light guide is attached along the inner periphery of the case, and the upper end of the light guide is provided. A flange projecting outward is integrally formed on the side, the flange is placed in the shape of a flange bent outward on the periphery of the case opening, and an annular facing plate is disposed on the upper surface of the flange. A lighting system for vehicle instruments.