JPS6226874Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lighting device, and particularly to a lighting device that is most suitable for use in small electronic devices such as car stereos.

Traditionally, various types of lighting and indicators have been used in car stereos to improve operability and visibility, but especially in recent models, the area around the control knobs and buttons is illuminated to illuminate them. Since the position is clearly defined, a large number of light sources are required, which not only hinders miniaturization of the device but also has drawbacks such as increased power consumption and increased costs. Of course, in order to reduce the number of light sources, some light sources are guided from one light source to illuminate multiple areas, but in this case, light leakage to areas that do not require illumination is prevented. This method has the drawback of requiring a separate light-shielding plate for this purpose, and furthermore, it cannot be used in areas where a large movement stroke is required, such as illuminating the cassette insertion door or operating lever.

The purpose of this invention was made in view of the above-mentioned problems.The purpose of this invention is to make it possible to illuminate many places with a small number of light sources without the need for special light shielding, and to provide a light source that can be used with open/close lids, etc. An object of the present invention is to provide a lighting device that can illuminate even such operating members.

Hereinafter, the configuration of the present invention will be explained based on FIGS. 1 to 7, which are examples thereof.

The illustrated example is an example in which the interior lighting of a car stereo is implemented. In the figure, 1 is a panel frame of a car stereo, with a cassette magazine insertion window 2 approximately in the center, and push buttons 3, 3', etc. on the sides. are arranged, and first and second lighting windows 4, 5 are formed on the sides of the push buttons 3, 3'. 6 is panel frame 1
As shown in FIG. 5, the light guide is disposed on the back side of the light guide, and is made of transparent resin and has a substantially prismatic shape, and has a recess 7a in which the illumination lamp 7 is placed.

A hypotenuse portion 8 is formed on one side (first side) of the light guide 6, and a reflective layer 8a is formed on the hypotenuse portion 8 by applying white paint, etc., so that the light source can be Light is emitted from the display surface 9 on the other side (second side). A light radiation surface 10 is provided on one end side (third side surface) of the light guide 6 so that the perpendicular line Q from the center light emitter P of the illumination lamp 7 is at right angles, and a light radiation surface 10 is provided on one end side (third side surface) of the light guide body 6; ) are each formed with a light radiation surface 11 such that the perpendicular line M from the light emitter P is at a right angle. The display surface 9 is formed with a jetty portion 9a that fits into the window 5 of the panel frame 1, and the reflected light from the reflective layer 8a is irradiated from the jetty portion 9a to illuminate the push buttons 3, 3', etc. It's getting old.

The cassette magazine insertion window 2 is provided with a flap-shaped door 12 which is supported by a shaft 13b and which is always closed by a spring 13a, and which opens when the cassette magazine C is inserted. ing. When the door 12 is closed, one side 14 corresponds to the light radiation surface 10, and its cross-sectional structure includes a metal plate 12b on the back side and a transparent lighting plate 1 on the front side.
2a, so that the display characters etc. displayed on the surface of the metal plate 12b can be seen through.
Therefore, when the door 12 is closed, the light from the light radiation surface 10 is transmitted from one side 14 to the illumination plate 1.
2a, and the above-mentioned character display etc. are displayed. If the illumination plate 12a of the door 12 is the first illumination plate, 15 is a second illumination plate made of a transparent body with an L-shaped cross section, and has one side facing the light radiation surface 11. A plate-shaped portion 17 on the other side is located within the second illumination window 4 in the panel frame 1. Therefore, the light from the light radiation surface 11 is introduced through the slope portion 16 and illuminates the push button 3 by the plate portion 17.

In the embodiment, the push button 3 is provided with locking hooks 3a, 3a facing each other on the back side, and a guide pin 3b that abuts the switch is protruded from the center of the push button 3, and this mounting structure and the above-mentioned second The relationship with the illumination plate 15 is as follows. That is, the upper surface side of the window 4 is opened, the push button 3 is fitted from above, the second lighting plate 15 is inserted from above as shown in FIG. 18 is fitted and fixed.
Therefore, cutouts 19 and 19' are formed on the inner surface of the second illumination plate 15 for allowing the locking hook 3a and guide pin 3b to escape.

The first illumination plate 12a has protrusions 20, 2 whose spacing is narrower than the width W of the cassette magazine C.
1, and the protrusion 20 on the side that abuts the protrusion D of the cassette magazine C is lower than the other protrusion 21 by the height of the protrusion D. These protrusions 20 and 21 prevent the illumination plate 12a from being damaged when inserting the cassette magazine C, and the light from the illumination plate 12a has a different light emission state at the protrusions 20 and 21 than at other parts. There is an advantage that the position where the cassette magazine C should be inserted is clear even in dark conditions such as at night.

As above, insert the cassette magazine into the insertion window 2.
When the cassette magazine C is completely attached, the door 12 is completely opened, so that the light from the light emitting surface 10 can illuminate the label E of the cassette magazine C, allowing the operating state to be visually observed.

In the above example, each of the light radiation surfaces 10 and 11 is arranged to be perpendicular to the perpendicular lines Q and M from the central light emitter P, but it is not necessarily perpendicular, and the same effect can be obtained as long as it is within the critical angle of reflection. Of course, this can be obtained.

As mentioned above, by one light source 7, the jetty part 9
window 5 (therefore the other push buttons 3, 3') via a;
The light radiating surface 10 causes a lighting plate 12a in the door 12, and the light radiating surface 11 causes a second lighting plate 1.
5 can illuminate the window 4 (therefore, the push button 3), etc., and the light emitting surface 10 can illuminate the upper surface of the cassette magazine C when the door illumination plate 12a is retracted. , each part can be illuminated with a single light source, and movable parts such as doors can also be illuminated. Note that in other devices that require illumination with the movable part moved, the second illumination plate may correspond to the light radiation surface 10 formed on the third side surface with the movable part moved. Of course, it can also be configured as follows.

According to the lighting device of the present invention, in an electric device having a movable part on the front panel, such as a tape recorder having a flap-type door in the cassette insertion slot, the illumination window provided in the movable part and the front panel can be used. In the case of illuminating the front panel, the recessed portion is provided for arranging the illumination lamp, a reflective layer is formed on the first side surface, and the second side surface is used as the display surface and is disposed in the first illumination window of the front panel. and a light guide having a light emitting surface on each of its third and fourth side surfaces, and a light emitting surface on the third side surface when the movable part is in a fixed position or in a state of movement. a first illumination plate provided on the movable part to correspond to the above-mentioned fourth side surface; and a second illumination plate formed on the front panel with the other side surface as a display surface and having a sloped surface corresponding to the light emitting surface of the fourth side surface. Since it is equipped with a second lighting board that is arranged in the window, the first and second lighting boards provided on the front panel
The illumination window and the movable part can be illuminated with one light source, and the number of light sources can be significantly reduced, resulting in cost reduction and space saving. Therefore, it is ideal for lighting devices such as car stereos that require miniaturization.

[Brief explanation of the drawing]

The drawings show an embodiment of the lighting device according to the present invention,
Fig. 1 is a front view showing the main parts of the panel frame, Fig. 2 is a rear view showing the back side of the panel frame, Figs. 3 and 4 are plan views showing the lighting device installed in the panel frame, 5 is a perspective view showing the shapes of the light guide and the second illumination plate, FIG. 6 is a partially cutaway perspective view showing the configuration of the lighting device, and FIG. 7 is an exploded perspective view of the main parts. 1: Panel frame, 2: Cassette magazine insertion window,
3, 3': push button, 4, 5: lighting window, 6: light guide, 7: lighting lamp, 12a: first lighting board, 1
5: Second illumination plate, C: Cassette magazine.

Claims (1)

[Scope of Claim for Utility Model Registration] In electrical equipment with a movable part on the front panel, such as a tape recorder with a flap-type door in the cassette insertion slot, the movable part and the illumination window provided on the front panel are illuminated. A lighting device for lighting, comprising a recess for arranging an illumination lamp, and a first
A reflective layer is formed on the side surface of the display panel, and the second side surface is used as a display surface to be placed in the first illumination window of the front panel, and the third and fourth side surfaces are provided with light radiation surfaces, respectively. a first illumination plate provided on the movable part so as to correspond to the light radiation surface of the third side surface when the movable part is in a fixed position or in a state of movement; It has a slope portion corresponding to the light radiation surface on the side surface of No. 4,
An illumination device comprising: a second illumination plate disposed in a second illumination window formed in a front panel with the other side as a display surface.