JPH0418158Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a so-called illumination device for backlighting the front operation section of in-vehicle audio equipment such as a cassette tape player or a CD player.

<Prior art> In-vehicle audio equipment such as cassette tape players and CD players are illuminated with high brightness and multicolors on the front operation parts, especially the liquid crystal display panel, knob buttons, etc., for ease of operation and appearance design. There is. In the conventional lighting method, individual light sources are placed on each of the liquid crystal display panel, knob buttons, etc. to directly illuminate them.

<Problems to be solved by the invention> However, according to the above-mentioned conventional lighting system, in order to color-code the liquid crystal display board and knob buttons, so to speak, it is necessary to provide separate light sources and optical paths for each color. Moreover, a large amount of space is required to arrange the light source, and the cost increases. Furthermore, the heat generated by each light source raises the temperature inside the front operating section, causing many problems such as degrading the characteristics of various electronic components such as a liquid crystal display element.

<Means for Solving the Problems> The present invention was devised to solve the above problems, and consists of placing one light source at the rear of the in-vehicle audio equipment, and guiding the light source from this light source. The lighting device illuminates the front operation section of the audio equipment by guiding it through a light guide provided at the front of the audio equipment using the body, and switches the color or darkness of the light beam using a color filter switching device provided on the light guide. . Furthermore, the color filter switching device includes a long plate-shaped multicolor filter that is color-coded in the longitudinal direction, a filter guide that holds the multicolor filter so as to be movable in the longitudinal direction, and a motor that moves the multicolor filter. The multicolor filter is loosely inserted into a gap provided substantially perpendicular to the optical path of the light guide.

<Operation> Therefore, the light rays guided by the light guide and passing through the optical path are appropriately changed by the color filter switching device to various colors or shades provided in the multicolor filter by a switch operation. Therefore, the front operating section illuminated by the light guide is displayed in a wide variety of colors or shadings.

<Example> The illumination device of the present invention will be described in detail below based on the drawings.

FIG. 1 is a schematic plan cross-sectional view of a vehicle-mounted audio device equipped with the illumination device of the present invention, and FIG. 2 is a schematic cross-sectional view of the same side.

The in-vehicle audio equipment 1 houses, for example, a cassette tape deck 11 therein, and cassette tapes are inserted and ejected from a cassette tape insertion slot provided in a front operation section 12.

The front operation section 12 is provided with illumination sections 12a and 12b such as a liquid crystal display board and knob buttons. A light box 2 is provided on one side of the cassette tape deck 11 and at the rear. This light box 2 has a fin-shaped heat dissipating section 21 and a concave-shaped condensing section 22 integrally formed by aluminum processing. A light source L made of a halogen lamp or a xenon lamp is arranged at the focal point of the condenser 22 . Further, an infrared absorption filter 3 is arranged in front of the light source L.

The light beam from the light source L is guided to a light guide 4 provided opposite the infrared absorption filter 3, and then to a light guide 5. The light guides 4 and 5 are formed, for example, by mirror-finishing a transparent acrylic resin material, or are formed by a plurality of glass fibers, and provide an efficient optical path for completely reflecting and guiding the incident light beam. form. A gap O is formed between the light guides 4 and 5 in a state substantially orthogonal to the optical path. Then, a color filter switching device 6 with a multicolor filter F, which will be described later, loosely inserted into this gap O.
is installed.

3 is a schematic plan view of the color filter switching device 6, FIG. 4 is a schematic cross-sectional view thereof, FIG. 5 is a schematic side view thereof, and FIG. 6 is a schematic front view thereof. As shown in these figures, the color filter switching device 6 includes a long plate-shaped multicolor filter F that is color-coded in the longitudinal direction, a filter guide 7 that holds the multicolor filter F so as to be movable in the longitudinal direction, It is comprised of a drive unit 8 that moves the multicolor filter F in the longitudinal direction by a motor 81.

The multicolor filter F is color-coded, for example, amber, green, and transparent.
The filter guide 7 is a frame body provided with an opening 71, and is erected on the front end of the substrate G with its longitudinal direction substantially horizontal, and is integrated with the drive section 8. And the multicolor filter F is this filter guide 7.
Therefore, it is held movably in the longitudinal direction, that is, in the left-right direction, in the gap O between the light guides 4 and 5.

On the other hand, the drive unit 8 is configured in two stages, with an upper plate H provided above the substantially horizontal substrate G. On the upper plate H are a motor 81 with a horizontal rotation axis, and a motor 8.
A worm gear 82 and a worm wheel gear 83 are provided for decelerating the rotation of the rotor 1 and converting the axis of rotation in the vertical direction. An upper end portion of an idler gear 84 that passes through the upper plate H and is supported by the substrate G is engaged with the worm wheel gear 83.

Also provided on the board G are a rotary gear 85 engaged with the lower end of the idler gear 84, and an arm 86 rotatable in a horizontal plane supported by a support shaft N at the rear end of the board G. . Furthermore, a pin P erected on the upper surface of the rotary gear 85 is connected to the arm 8.
It is inserted into a long hole 86a drilled in 6.

The tip 86b of the arm 86 is inserted into a hole f formed at the end of the multicolor filter F.

Therefore, when the motor 81 is rotated, the rotation of the worm gear 82 is caused by the rotation of the worm wheel gear 83.
from the rotary gear 8 via the idler gear 84.
5. Therefore, the arm 86 rotates within a certain range, and the multicolor filter F is moved left and right. The movement of the multicolor filter F may be controlled by changing the rotational direction of the motor 81, or may be reciprocated by rotating the motor 81 in a fixed direction.

That is, the motor 8 of the color filter switching device 6
When 1 is turned on and off, the switch is turned on from the front operation section 12.
, the light beams passing through the light guide paths 4 and 5 can be appropriately changed to the color provided in the multicolor filter F, for example, amber, green, or colorless, by operating a switch. Therefore, the illumination parts 12a, 12 of the front operation part 12 are illuminated by the light guides 9, 9.
b is displayed in a wide variety of colors.

Furthermore, if the multicolor filter F is the same color but has a different transmittance, the shading of the light beam passing through the light guide paths 4 and 5 will be changed, and the illumination parts 12a and 12b will be displayed with the shading changed. .

<Effects of the Invention> As described above, the illumination device of the present invention has a compact structure, and the color or shade of illumination can be changed as appropriate by operating a switch. Therefore, diversifying the backlighting of audio equipment,
The operability and luxury feel of audio equipment can be improved.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of an in-vehicle audio equipment equipped with the illumination device of the present invention, FIG. 2 is a schematic cross-sectional view of the same side, FIG. 3 is a schematic plan view of a color filter switching device, and FIG. The figure is a schematic cross-sectional view of the same plane, and FIG.
FIG. 6 is a schematic front view of the same. 1...In-vehicle audio equipment, 12...Front operation unit,
12a, 12b...Lighting part, 2...Light box, 21... Heat radiation part, 22... Light collecting part, 3...Infrared absorption filter, 4, 5... Light guide, 6...
Color filter switching device, 7... Filter guide, 8... Drive section, 9... Light guide, F...
...Multicolor filter, L...Light source, ...Optical path, O
……gap.

Claims (1)

[Scope of utility model registration request] A light source is arranged at the rear of the audio equipment, and a light beam from the light source is guided by a light guide to a light guide provided at the front of the audio equipment to illuminate a front operation section of the audio equipment, and the light is disposed in the light guide. The lighting device switches the color or density of the light beam using a color filter switching device, the color filter switching device includes a long plate-shaped multicolor filter that is color-coded in the longitudinal direction, and a multicolor filter that is color-coded in the longitudinal direction. The multicolor filter is composed of a filter guide that is movably held in the light guide, and a drive unit that moves the multicolor filter by a motor, and the multicolor filter is loosely inserted into a gap provided substantially perpendicular to the optical path of the light guide. An illumination device for in-vehicle audio equipment, characterized by: