JPS626485Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an instrument pointer illumination device.

Recently, in order to improve visibility at night, instruments such as those for vehicles are equipped not only with illumination on the scale plate, but also with pointer illumination, which is made of transparent acrylic resin, etc., and which guides light to make the pointer shine. This is becoming more common.

In such pointer illumination, conventionally, the 1st
As shown in the figure and FIG. 1b, a light guide plate 2 is provided below the dial 1, and light is directly irradiated onto the light guide plate from a light source (not shown), and the pointer 3 faces the light guide plate at the central light receiving part. Light is received around the entire circumference of the pointer 3a, and the received light is made to reach the tip 3b and rear end 3c of the pointer 3 via a plurality of reflective surfaces 4 formed in the light receiving section.

However, in such conventional pointer illumination, in order to hide the pointer shaft 5 and prevent light leakage in the pointer light receiving section 3a that receives light from the light guide plate 2, the pointer cap 6 is placed above the pointer light receiving section 3a. Since it is crowned on top, only the front and rear ends 3b and 3c of the pointer 3 can be made to shine, and therefore the entire pointer cannot be made to shine to improve visibility.

In addition, as another conventional example, there is one in which only the tip of the pointer is made to shine, as shown in Figure 2.
This also had the same drawbacks as mentioned above.

The present invention provides a pointer illumination device that eliminates these conventional drawbacks and allows the entire pointer to shine.

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 3a and 3b.

In FIGS. 3a and 3b, the pointer 33 is divided into a pointer main part 33a and a pointer light receiving part 33b, and is fixed to the tip of a pointer shaft 35 so as to receive light from the light guide plate 32, which is a light guide member, from the surroundings. The pointer light-receiving section 33b is located at the central portion 33c of the pointer main section 33a.
It is fitted into the lower surface 33e of. The pointer light receiving section 33b has a structure having a reflecting surface 33f that sequentially reflects light received from its surroundings and guides it to the front and rear ends of the pointer main section 33a.

By adopting such a pointer structure, the fitted portion 33e of the pointer main portion 33a is arranged such that the pointer cap 36 covers the pointer light receiving portion 33b as shown in the figure.
Since it can be installed around the pointer shaft 3
5 and prevents light leakage in the pointer light receiving section 33b that receives light from the light guide plate 32, the entire main part of the pointer can be illuminated, and the visibility of the instrument pointer can therefore be further improved. .

In addition, as shown in FIG. 4, by forming the fitting portion between the pointer main portion 33a and the pointer light receiving portion 33b into a curved surface 37 near the upper surface of the central portion 33c of the pointer main portion 33a, the light is reflected by this curved surface 37. Light pointer tip 3
The arrival point on the 3d side can be made further away than in the case of FIG. 3b, and therefore the attenuation due to repeated reflections of the light can be further reduced.

In addition, in the above explanation, the light given to the pointer was explained as being from the light guide plate 32, but this is not limited to the light guide plate, and the dial 31 may also serve as a light guide plate. Of course.

As described above, the present invention provides an extremely useful pointer illumination device that has a simple mechanism and can illuminate the entire pointer without using any special parts, further improving the visibility of the instrument pointer. is provided.

[Brief explanation of the drawing]

Figure 1a is a perspective view of main parts showing an example of the conventional technology;
Figure b is a detailed sectional view of this conventional example taken along the line 1b-1b in Figure 1a, Figure 2 is a perspective view of the main parts of another conventional example, and Figure 3a is an example of the present invention. FIG. 3B is a sectional view showing an example of the present invention in detail along the line 3B-3B of FIG. 3A, and FIG. This is a similar diagram. 31... Dial plate, 32... Light guide plate, 33... Pointer, 33a... Pointer main part, 33b... Pointer light receiving section, 33e... Fitting part, 33f... Reflective surface, 3
5... Pointer shaft, 36... Pointer cap.

Claims (1)

[Scope of utility model registration request] A pointer light receiving section is fixed to the tip of the pointer shaft and has a reflecting surface that receives light from the light guiding member from the surrounding area and sequentially reflects this light to guide it to the front and rear ends of the pointer main section. What is claimed is: 1. A pointer illumination device for an instrument, characterized in that the pointer cap is fitted into the main part of the pointer, and a pointer cap is attached around the fitted part of the pointer main part to cover the pointer light receiving section.