JPH0636641A - Lighting control unit - Google Patents

Abstract

PURPOSE:To provide a lighting control unit which can provide an indication of a function and that of an operation on its luminous part without causing a difference in luminance at the luminous part. CONSTITUTION:A lighting control unit is provided with a first knob 1 having a front display face 1a, on which letters for a function and an operation are displayed using translucent members; and fitted with an inner shaft 2a which does not have a rotary function and a doughnut-shaped transparent portion 3a through which light from an internal light source 4 is transmitted to illuminate the display face 1a of the first knob 1. Also a second knob 3 is provided which is fitted with an outer shaft 2b having a rotary function and is so formed to cover the outer periphery of the first knob 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illumination knob device used for car audio and the like.

[0002]

2. Description of the Related Art FIG. 2 is a cross-sectional view showing a conventional illumination knob device disclosed in Japanese Utility Model Laid-Open No. 3-24232, in which 11 is an illumination knob and 11a is a guide provided inside thereof. A light portion, 11b is a light refracting portion, and 11c is an outer light emitting portion. 12 is a volume, 12a is fitted to the illumination knob 11, and is rotated to rotate the volume 12
Is a rotary shaft for adjusting, LED 13 is fixed to the volume 12, and 14 is a printed circuit board.

Next, the operation will be described. Illumination knob 1
The rotary shaft 12a is rotated by rotating 1 to adjust the volume 12. In addition, the light beam from the LED lamp 13 is provided in the illumination knob 11 inside the light guide portion 11 a.
Is reflected by the light refracting portion 11b via the
The point of the volume 12 can be displayed by irradiating c.

[0004]

Since the conventional illumination knob device is constructed as described above, it is necessary to rotate the illumination knob 11 in synchronization with the rotation shaft 12a and display the point of the volume 12 on the light emitting portion 11c. I can only do it again,
Since the LED lamp 13 is fixed and there is only one light guide portion 11a, there is a problem in that there is a brightness difference in the light emitting portion 11c depending on the rotation angle of the illumination knob 11.

The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an illumination knob device capable of displaying a function and an operation display on a light emitting portion and not causing a brightness difference in the light emitting portion. To aim.

[0006]

An illumination knob device according to the present invention has a first knob fitted to an inner shaft and a light beam from an internal light source, the first knob having a design surface formed by a transparent member. A second part which has a donut-shaped transparent part which penetrates and irradiates the design surface of the first knob and which is formed so as to cover the outer periphery of the first knob and is fitted to the outer shaft having a rotating function. It is equipped with a knob.

[0007]

In the illumination knob device according to the present invention, the function display and the operation display are provided on the design surface of the first knob. Also,
The second knob rotates the outer shaft to adjust the volume etc.
Further, the donut-shaped transparent portion of the second knob irradiates the design surface of the first knob with the same amount of light without changing the amount of transmitted light even if the second knob rotates.

[0008]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is the inner first knob,
The front surface of the first knob 1 has a design surface such as operation characters and function characters made of a translucent member, and is fitted to the inner shaft 2a of the volume 2 having no rotation function. Reference numeral 3 is a second knob which is formed so as to cover the outer circumference of the first knob 1 and which is fitted to the outer shaft 2b having a rotating function. Reference numeral 3a is a transparent portion provided in a donut shape on the second knob 3. Reference numeral 4 is a light source (internal light source) attached to the printed circuit board 5, 6 is a light guide, and 6a is a light refracting portion. 7 is a housing,
8 is a front panel.

Next, the operation will be described. The light beam from the light source 4 passes through the light guide body 6 and is guided to the second knob 3 by the light refracting portion 6a. Next, this light ray passes through the doughnut-shaped transparent portion 3a of the second knob 3 and reaches the design surface 1a of the first knob 1. Then, this light beam illuminates the operation characters and the function characters applied on the translucent member.
At this time, even if the second knob 3 is rotated and the outer shaft 2b is rotated, the donut-shaped transparent portion 3a irradiates the design surface 1a with the same light amount without changing the light amount transmitted at any angle. To do. In addition, the light guide 6 has a light refracting portion 6
Since there is only one location a, there is little attenuation of the amount of light, and there is the advantage that high brightness display is possible.

In order to clarify the location of the second knob 3, the light guide 6 may illuminate the outer periphery of the second knob 3 with leak light.

[0011]

As described above, according to the present invention, the first knob having the design surface formed by the light transmitting member and fitted to the inner shaft and the light beam from the internal light source are transmitted therethrough. A second knob that has a donut-shaped transparent portion that irradiates the design surface of the first knob, is formed so as to cover the outer circumference of the first knob, and is fitted to the outer shaft having a rotating function, and Since the configuration is provided with, it is possible to display the functional characters and the operation characters on the design surface of the first knob, and it is possible to significantly improve the operability. Further, the donut-shaped transparent portion included in the second knob can cause the design surface to emit light with the same brightness without changing the amount of transmitted light even when the second knob rotates.

[Brief description of drawings]

FIG. 1 is a sectional view showing an illumination knob device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a conventional illumination knob device.

[Explanation of symbols]

 1 first knob 1a design surface 2a inner shaft 2b outer shaft 3 second knob 3a transparent portion 4 light source (internal light source)

Claims (1)

[Claims] 1. A first knob having a design surface made of a translucent member and fitted to an inner shaft, and a light beam from an internal light source is transmitted to irradiate the design surface of the first knob. An illumination knob having a donut-shaped transparent part, and a second knob formed to cover the outer periphery of the first knob and fitted to an outer shaft having a rotating function. apparatus.