JP2000133072A - Indicator lighting device - Google Patents

Abstract

(57) [Problem] To provide an index illuminating device capable of stably and evenly displaying an index without providing a light emitting diode on a rotating operation knob. SOLUTION: A light source 16a, 16b provided on a fixed side illuminates an operation knob 13 from the back to display an index, and the operation knob 13 is rotated to rotate the light sources 16a, 16b.
b. The shape of the light introducing hole is appropriately inclined such that the shape of the light introduction hole becomes wider from the front side of the knob body toward the back side of the knob body so that the index can be displayed brightly even if the irradiation position of b is shifted from the position of the index. The surface 21 was constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indicator lighting device for operating knobs used for adjusting the volume of audio equipment.

[0002]

2. Description of the Related Art Heretofore, this type of indicator illuminator has been known in which an indicator is illuminated by holding and fixing a printed circuit board together with an operation knob.

Specifically, as shown in FIG. 5, a transparent light guide piece 5 serving as an index is provided on an operation knob 4 mounted on an operation shaft 3 of a variable resistor 2 mounted on a printed circuit board 1. Embedded. Reference numeral 6 denotes a device panel in which an insertion hole 7 of the operation knob 4 is formed.

An auxiliary board 9 on which a light emitting diode 8 is mounted is attached to the operation knob 4.
Is configured to be supplied with power from the printed circuit board 1 via a wiring member 10 to emit light.

[0005] The light of the light emitting diode 8 is emitted to the outside of the operation knob 4 through the light guide piece 5 to display an index, and the rotation angle of the operation knob 4 can be confirmed from the display of the index.

[0006]

In such an indicator lighting device, since the rotating operation knob 4 is supplied with power from the fixed printed circuit board 1 via the wiring member 10, the rotation angle is limited. is there.

Further, since the auxiliary board 9 is attached to the operation knob, the structure of the operation knob itself becomes complicated and the operation knob becomes large. SUMMARY OF THE INVENTION An object of the present invention is to provide an indicator illuminating device that can display an indicator stably and evenly without providing a light emitting diode on a rotating operation knob.

[0008]

The indicator illuminating device of the present invention illuminates the operation knob from the back side with a light source provided on the fixed side to display the index, and rotates the operation knob to determine the irradiation position of the light source and the illumination position. In order to be able to display the indicator brightly even if the position of the indicator deviates, the shape of the light introduction hole on the side of the operation knob is appropriately increased from the front side of the knob body toward the back side of the knob body. It is characterized by comprising.

According to the configuration of the present invention, the index can be stably and evenly displayed without providing the light emitting diode on the rotating operation knob.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The indicator lighting device according to claim 1 is
An indicator illuminator for transmitting and illuminating an indicator attached to an operation knob from a back surface, comprising a light source disposed on a fixed side of the back surface of the operation knob, and having the operation knob attached to an operation shaft and partially passing through an outer periphery. It consists of a knob body with a light window and a knob cover attached to the surface of the knob body,
The light-transmitting window of the knob main body is opened on the back surface side of the knob main body connected to the first light-transmitting portion having one end of the light transmitting port opened on the surface of the knob main body and connected to the other end of the first light-transmitting portion. The second light-transmitting portion is formed, and the shape of the second light-transmitting portion is formed by an inclined surface that becomes wider from the front surface side of the knob main body toward the rear surface side of the knob main body.

[0011] The indicator lighting device according to the second aspect is the first aspect.
In the back surface of the knob cover, a projection which is translucent and is inserted into the first light transmitting portion of the knob body is formed, and the knob cover is made of a resin mixed with a diffusing material for diffusing light. It is characterized by being molded.

According to a third aspect of the present invention, there is provided an indicator lighting apparatus.
In the above, the panel having the operation knob insertion hole is provided with a rib surrounding the outer peripheral portion of the light source provided on the fixed side, formed on the back surface of the panel.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
It will be described based on. (Embodiment 1) FIGS. 1 to 3 show (Embodiment 1).

The operation knob 13 attached to the operation shaft 12 of the rotary encoder 11 attached to the printed circuit board 1 comprises a knob body 13a and a knob cover 13b attached to the surface of the knob body 13a as shown in FIG. It is configured. Reference numeral 14 denotes an equipment panel in which an insertion hole 15 of the operation knob 13 is formed.

On the printed circuit board 1 which is fixed to the operation knob 13, light emitting diodes 16a, 16b, 16c, 1 as light sources are provided around the rotary encoder 11.
6d is attached.

A light transmitting window 18 formed by a slit 17 and the like is formed in the knob main body 13a. Specifically, as shown in FIGS. 2 and 3, a first light transmitting portion 19 having one end of a light transmitting opening opened on the surface of the knob main body 13 a and a knob main body connected to the other end of the first light transmitting portion 19. The second light-transmitting portion 20 is opened on the back surface side of the knob 13a, and the shape of the second light-transmitting portion 20 increases from the front surface side of the knob body 13a toward the rear surface side of the knob body 13a. Slope 21
It is composed of

The knob body 13a is formed of a milky white resin which does not transmit light, while the knob cover 13b is formed of a translucent resin mixed with a diffusing material. On the back surface of the knob cover 13b, a projection 22 inserted into the first light transmitting portion 19 of the knob main body 13b is integrally formed.

When the knob main body 13a and the knob cover 13b are assembled, the protrusion 22 is positioned as shown in FIGS.
The light emitted from the light emitting diode is inserted into the first light transmitting portion 19 of the knob body 13a as shown in FIG.
The light enters the projection 22 of the knob cover 13b from the second light transmitting portion 20 of the knob main body 13a, is diffused by the knob cover 13b, is emitted to the outside of the operation knob 13, and is transmitted to the first light transmitting portion of the knob main body 13a. The index determined by the projection 19 and the protrusion 22 of the knob cover 13b is transmitted and illuminated.

When the portion forming the index is rotated to an intermediate position of the light emitting diode as shown in FIG. 3, the index transmitted through the operation knob 13 is expected to be dark. In the embodiment, the knob main body 1
Since the shape of the incident side of the second light-transmitting portion 3a is formed on the inclined surface 21 which becomes wider from the front side of the knob main body 13a toward the rear side of the knob main body, the operation knob 13 shown in FIG. Even at the rotational position of, the light can be satisfactorily incident and the index can be displayed stably without darkening.

More specifically, on the side surface of the projection 22 provided on the knob cover 13b mixed with the diffusing material, the visible light that has entered is reflected to prevent the visible light from passing through the portion other than the index portion. Thickness enhances the effect of the diffuser,
When moved to a position directly above the light emitting diode, the optical center is hidden, and the index of the operation knob 13 can be displayed evenly at any position.

The light emitting diodes 16a to 16a are mounted on the fixed side.
Since the operation knob 13 is provided to transmit and illuminate the operation knob 13, the operation knob does not become large. Also, 360
Rotary encoder 1 whose operation shaft 12 rotates more than degrees
Even with the operation knob attached to 1, the indicator can be illuminated by transmission.

(Embodiment 2) FIG. 4 shows (Embodiment 2)
Is shown. In this embodiment, the light emitting diodes 16a to 16a
Only the point that the rib 23 surrounding the outer peripheral portion of the 16d is formed on the back surface of the device panel 14 is different from (Embodiment 1), and the other points are configured the same as (Embodiment 1). .

With this configuration, the equipment panel 14
The ribs 23 provided on the ribs prevent the light of the light emitting diodes 16a to 16d from escaping out of the movable range of the indicator, and
The amount of light within the movable range can be increased by the reflection at 3, and the effect of eliminating unevenness of the index and brightening the index can be obtained.

[0024]

As described above, according to the present invention, the indicator lighting of the operation knob can be realized with a very simple structure, the rotation of the operation knob is not restricted, the structure of the operation knob itself is simplified, and This has the advantageous effect of realizing miniaturization.

[Brief description of the drawings]

FIG. 1 is a front view and a longitudinal sectional view of a first embodiment of an indicator lighting device according to the present invention.

FIG. 2 is an exploded perspective view of the operation knob according to the embodiment.

FIG. 3 is a sectional view showing details of the embodiment.

FIG. 4 is a detailed view of a second embodiment of the indicator lighting device of the present invention.

FIG. 5 is a configuration diagram of a conventional indicator lighting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 12 Operation axis of rotary encoder 13 Operation knob 13a Knob body 13b Knob cover 14 Equipment panel 15 Operation knob insertion hole 16a, 16b, 16c, 16d Light emitting diode 17 Slit 18 Light transmission window 19 First light transmission part 20 2nd translucent portion 21 inclined surface 22 protrusion 23 rib

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Koji Wakiguchi 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5F041 DA56 DC23 FF11 5G052 AA21 BB02 JA02 JA09 JB05 JC04 JC13 JC20

Claims (3)

[Claims] 1. An indicator lighting device for transmitting and illuminating an indicator attached to an operation knob from a back surface thereof, comprising: a light source disposed on a fixed side of the back surface of the operation knob; And a knob cover attached to the surface of the knob body, wherein the light-transmitting window of the knob body has one end of a light transmission opening opened on the surface of the knob body. A first light-transmitting portion and a second light-transmitting portion connected to the other end of the first light-transmitting portion and opened on the back surface side of the knob main body; An indicator lighting device configured with an inclined surface that widens from the front side of the main body to the back side of the knob main body. 2. A knob, which is translucent and is inserted into the first light transmitting portion of the knob body, is formed on the rear surface of the knob cover, and the knob cover is mixed with a diffusing material for diffusing light. The indicator lighting device according to claim 1, wherein the indicator lighting device is formed of a molded resin. 3. The indicator lighting device according to claim 1, wherein a rib surrounding an outer peripheral portion of the light source disposed on the fixed side is formed on a back surface of the panel on which the operation knob insertion hole is formed.