JPS6133528Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to lighting devices for speedometers and other devices used in vehicles, especially automobiles and motorcycles. The purpose of this is to efficiently illuminate the pointers and indicator scales in order to improve the visual recognition effect.

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

Instrument mechanism 1 and lighting mechanism 2 are both in case 3.
A pointer shaft 4 protrudes from the instrument mechanism 1, and a pointer 5 made of a transparent material such as acrylic resin is extended and attached to the top of the pointer shaft 4 in a direction orthogonal thereto.

The indicator shaft 4 is inserted into the display plate 6 in the middle thereof, and the instrument mechanism 1 is arranged below the indicator 5 and approximately parallel to the indicator shaft 4.
It has been erected in On the upper surface of the display board 6, the number 7 serving as the indicated value is concentrically formed by painting or printing.

The light guide 8 is integrally formed with a flange 9 that protrudes inwardly within the rotation plane of the pointer 5 and a flange 10 that protrudes outward within the rotation plane of the pointer 5 at its upper end. An annular groove 12 having a reflective surface 11 that reflects light toward the tip of the pointer 5 is formed at the upper end in the extending direction.

A semi-transparent layer 14 is formed by applying a semi-transparent paint on which light rays stand out brightly on the continuous upper flat part 13 of the light guide 8 and the flange 9.
A light blocking layer 16 for blocking light rays is formed on a portion other than the scale 15 serving as the display section.

The light guide 8 is placed on a flange 17 formed with the flange 10 facing outward on the periphery of the opening of the case 3 via an annular elastic packing 18, and the glass plate 19 is placed in an inner circumferential groove of the waterproof packing 20. The caulking ring 21 is inserted into the case 3 so as to close the opening of the case 3.
It is fastened to the case 3 by tightening.

That is, in the above configuration, by positioning the upper flat part 13 of the flange 9 integrally formed on the light guide 8 on substantially the same plane as the pointer 5, the pointer 5 is positioned on the upper flat part 13 of the flange 9. Scale 1 formed on
5 is located at the same height as the pointer 5, and even when the meter is viewed from an angle, it prevents apparent misalignment between the finely detailed scale 15 and the position of the pointer 5 due to the viewing angle, and prevents misreading of the indicated value by the pointer 5. When various instruments are arranged horizontally on the instrument panel of a vehicle, the readability can be further improved.

Also, when lighting mechanism 2 is turned on at night,
The irradiated light beam from the illumination mechanism 2 enters the light guide 8 and is guided to the front side of the instrument, and the scale 15 is brightly illuminated through the semi-transparent layer 14 formed on the upper flat part 13 of the flange part 9. . Furthermore, the light rays guided to the flange 9 side and irradiated from the end face are effectively incident into the interior from the tip of the pointer 5, making the entire pointer 5 bright and shiny.

Further, the light beams incident on the light guide 8 and refracted and reflected on the inner surface are irradiated from the inner peripheral surface on the display panel 6 side, and illuminate the surface of the display panel 6. Therefore, the surface portion of the display board 6 is reflected by the inner peripheral outer surface of the light guide 8, and the surface part of the display board 6 is reflected.
The entire area is brightly illuminated by the light rays passing through the gap between the light guide 8 and the light rays emitted from the inner peripheral surface of the light guide 8.

In this way, from the upper end of the light guide 8 that guides the light beam from the illumination mechanism 2 to the front side of the instrument, the collar protrudes inwardly within the plane of rotation of the pointer 5 and guides the light beam to the tip of the pointer 5. While integrally forming part 9,
By forming the scale 15 on the upper flat part 13 of the flange 9, the pointer 5 and the scale 15, which are especially necessary for immediate reading of indicated values, can be illuminated with extremely good visibility, and reflections on the display board 6 can be illuminated. Scale 1 with lighting
This provides a three-dimensional display effect in which the number 5 stands out.

Furthermore, if both the light guide 8 and the flange 9 are made of a colored material or the like and are optionally colored, and the translucent layer 14 forming the scale 15 is made of white paint, the white scale 15 provides instructions during the daytime, During nighttime illumination, the color of the light guide 8 is transmitted through the scale 15, and together with the pointer 5, harmonious and vivid color illumination is achieved.

As described above, the present invention has a simple structure that makes it easy to assemble and improves visibility. It also guides the irradiated light from the lighting mechanism to the front of the instrument without wasting it, and uses the light guide for pointer illumination to illuminate the scale plate. With this configuration, it is possible to expect the effect of giving a high-class image due to the three-dimensional structure, and also to effectively prevent misreading due to the viewing direction, thereby providing a lighting device with excellent readability and high practical value.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a sectional view taken along the line A--A in FIG. 1, and FIG. 3 is an enlarged sectional view of the main part in FIG. Instrument mechanism: 1, lighting mechanism: 2, case: 3, pointer: 5, display board: 6, numbers: 7, light guide: 8, flange: 9, 10, scale: 15.

Claims (1)

[Scope of utility model registration request] The instrument mechanism and lighting mechanism are housed in a case, and a display board is installed below the pointer made of a transparent material attached to the pointer shaft of the instrument mechanism, and numbers indicating indicated values are concentrically arranged on the upper surface of the display board. A light guide is formed along the inner circumference of the case and guides the light from the illumination mechanism to the front side of the display board, and the upper end of the light guide is directed inward within the rotation plane of the pointer. A feature is that a flange that protrudes to the vicinity of the pointer rotation outer shell is integrally formed, and a light-shielding layer is formed at least on the upper plane of the flange except for the transmissible scale corresponding to the numerical values and up and down of the display plate. Lighting system for vehicle instruments.