JP2586896Y2 - Switch lighting structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch lighting structure for lighting a switch nameplate.

[0002]

2. Description of the Related Art Conventionally, as this kind of technology, there is a display device disclosed in Japanese Utility Model Laid-Open No. 52-116183, for example. In order to illuminate the entire nameplate with a uniform illuminance by the lamp, the display device has a large number of concave portions that reflect the light of the lamp on the lower surface of the light guide. Further, the light guide forms a V-shaped reflection surface or the like on which the light of the lamp is diffused above the lamp.

[0003]

SUMMARY OF THE INVENTION In the above-described display device, it is difficult to set the shape and arrangement of the reflecting surface and the concave portion of the light guide and the position of the lamp in order to illuminate the nameplate with uniform illuminance. There is.

[0004]

SUMMARY OF THE INVENTION A switch lighting structure according to the present invention includes a knob arranged side by side with a switch case, a nameplate arranged near the knob and indicating the function of the knob, and a nameplate. And a light guide that guides the light of the lamp to the nameplate and a lamp that illuminates the nameplate, wherein the light guide comprises:
A light receiving surface on which the lamp is installed at a substantially central portion of a lower surface portion ;
Protrusions that are inserted into and fixed to the board on both sides of the opening that forms the light receiving surface
Raising, respectively the reflecting surfaces of the lamp light on both outer sides of the protrusion
And, on the upper surface of the light conductor, uniform illumination of the lamp
In order to make the bright part above the light receiving surface dense,
The slightly bright portions on the left and right are roughly formed with halftone dot printing.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a switch lighting structure according to the present invention will be described in detail with reference to FIGS. 1, 2, 3 and 4. FIG.

Reference numeral 1 denotes a case such as a switch or a display device, on which a plurality of knobs 2 and a nameplate 3 are disposed on the upper surface. The knob 2 is an operator such as a push button switch or a slide switch. The nameplate 3 is made of a transparent or translucent body, is provided with a letter or a mark indicating the function of the knob 2, and is installed near the knob 2.

Reference numeral 4 denotes a light guide for guiding the light of the lamp 5 to the entire nameplate 3, and is provided on the lower surface of the nameplate 3. The light guide 4 is made of a transparent member, and has a light receiving surface 4a for inserting the lamp 5 in the center of the lower surface. The light receiving surface 4a is formed in a substantially hemispherical shape to diffuse the light of the lamp 5.
Reference numeral 4b denotes a protrusion for fixing the light guide 4, and is fitted to the substrate 7 via the rubber contact 6. 4c is
The reflecting surface reflects the light of the lamp 5 to the nameplate 3. On the upper surface of the light guide 4, a halftone dot printing for adjusting the illuminance of the lamp 5 is performed. The paint for halftone printing is the same color as the lamp filter 8. In the halftone printing, as shown in FIG. 3, the bright portion A of the light guide 4 near the lamp 5 is printed densely, the slightly bright portion B is printed coarsely, and the other dark portions C are printed.
Is not printed. In this manner, the light guide 4 prints the halftone dot density of halftone printing in accordance with the illuminance of the light radiated from the light guide 4, and makes the illuminance of the light radiated from the upper surface of the light guide 4 uniform. .

The lamp 5 is composed of, for example, an incandescent light bulb for night illumination, and has a lamp filter 8 attached thereto. The lamp 5 is mounted on a lamp holder 9 inserted into a substrate 7. The rubber contact 6 has a movable contact (not shown) below the knob 2 and is mounted on the substrate 7. Substrate 7
Is composed of, for example, a printed circuit board and has fixed contacts (not shown) printed thereon. Reference numeral 10 denotes a lower lid that fits into the open end of the case 1.

The lighting structure of the switch according to the present invention has the above-described structure, and its operation will now be described in detail. When the lamp 5 is turned on, light from the lamp 5 enters the light guide 4 from the light receiving surface 4a and diffuses. The light of the lamp 5 is reflected upward by the reflection surface 4c, radiates from the upper surface of the light guide 4, and illuminates the nameplate 3. The upper surface of the light guide 4 is subjected to halftone dot printing in which the density of halftone dots is adjusted according to the illuminance of emitted light. Thereby, the illuminance of light emitted from the entire upper surface of the light guide 4 becomes uniform, and the entire surface of the nameplate 3 is illuminated and displayed with uniform brightness.

[0010] The present invention provides a light guide 4 as described above,
Although the halftone printing for dimming the light has been described in detail, it is a matter of course that the same operation and effect can be obtained by performing the halftone printing on the lower surface or the upper surface of the nameplate 3.

[0011]

The lighting structure of the switch according to the present invention includes a knob arranged side by side in a switch case, a nameplate arranged near the knob and indicating the function of the knob, and a lower surface of the nameplate. In a lighting structure for a switch, comprising: a light guide for arranging and guiding light of a lamp to the nameplate; and the lamp for illuminating the nameplate, the light guide is substantially at a center of a lower surface portion .
A light-receiving surface on which the lamp is to be installed at a site, the light-receiving surface being formed
Protrusions to be inserted and fixed to the substrate on both sides of the opening,
The reflecting surface of the lamp light formed respectively on the outside, on the top surface of the light guide, in order to uniform the illuminance of the lamp, the
The bright part above the light receiving surface should be densely
By forming the halftone printing a bright portion to the crude, the shape of the light conductor simplified, it is possible to reduce the cost, One or
No tightening parts such as screws are required, and the light guide is
Can be fixed simply and quickly with a switch, reducing the number of assembly steps
And provide a high quality switch .

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG. 1;

FIG. 3 is a plan view showing an embodiment of the light guide of the present invention.

FIG. 4 is a front view showing an embodiment of the light guide of the present invention.

[Explanation of symbols]

 1 Case 2 Knob 3 Nameplate 4 Light guide 5 Lamp

Claims (1)

(57) [Scope of request for utility model registration] 1. A knob juxtaposed to a case (1) of a switch.
(2) and a knob arranged near the knob (2) and the knob
A nameplate for displaying the function of (2) (3), disposed on the lower surface portion of the該銘plate (3), and the lamp (5) the light nameplate
In a switch illumination structure including a light guide (4) leading to (2) and the lamp (5) for illuminating the nameplate (2) , the light guide (4) is provided at a substantially central portion of a lower surface portion. The lamp
The light receiving surface (4a) on which (5) is installed, and the light receiving surface (4a)
Projections to be inserted and fixed to the substrate (7) on both sides of the formed opening
(4b), the lamp on both outer sides of the projections (4b) (5) a light reflection surface of the (4c) formed respectively, the light conductor (4)
On the upper surface of the lamp , the illuminance of the lamp (5) should be uniform.
And a bright portion (A) above the light receiving surface (4a).
Characterized in that halftone dot printing is formed densely on the left and right slightly bright portions (B) .