CN100407348C - Lighting device for operation part - Google Patents

Abstract

A lighting device for an operating part, wherein a light emitting source such as a light emitting diode is disposed in an operation knob at the front of a light guide piece or in the bearing part of the operation knob, light beam from the light emitting source is temporarily radiated to the inside of the operation knob, and reflected indirect light irregularly reflected inside the operation knob is received by the light guide piece with light transmission and diffusion function disposed at the rear of the operation knob and guided to the outer peripheral part thereof to illuminate the rear surface of the operation knob.

Description

Lighting device for operation part

technical field

The present invention relates to an illuminating device for an operation portion of electronic equipment such as audio equipment and communication equipment.

Background technique

Fig. 11 is a schematic side sectional view showing a conventional light ring (ライトリンク) device (JP2815986B), Fig. 12 is a sectional view showing the A-A line of Fig. 11, and Fig. 13 shows the base of the aforementioned conventional light ring device and the mounting on it. Schematic front view of a light-emitting diode.

As shown in FIG. 11 and FIG. 12 , the light ring device 30 has a cylindrical shape, and nine inner cavities 31 divided by three inclined triangular-shaped surfaces 31A are formed at equal intervals on the device 30 . The apex 32 of the triangular-shaped surface 31A of the cavity 31 is located at the outermost position of the triangular-shaped surface 31A at the central position, and is also located at the outermost peripheral position inside the light ring device 30 . The front end of each light emitting diode 33 is arranged to face the substantially apex 32 of the triangular-shaped surface. As shown in FIG. 12 , when each triangular-shaped surface 31A is viewed from the back, the corner portions 34 and the valley portions 35 extending linearly are formed at equal intervals. The cavity 31 has the function of a light receiving surface, receives the light from the corresponding LEDs 33 , diffuses the light from the LEDs 33 sufficiently, and guides the light into the upper part (abba part) 36 of the light ring device 30 . Then, the light introduced into the upper portion 36 is guided to the ring portion 37 and visually viewed by the user.

In such a lighting device, two or more light emitting sources are required to uniformly emit light from the ring portion 37 . Also, since the distance from the light source to the ring-shaped illumination visible portion of the operation knob needs to be increased, when the light source is arranged inside the operation knob, there are great restrictions on arrangement and design of the respective components.

Contents of the invention

The object of the present invention is to provide a high-quality illuminating device for the operation part, that is, the shadow of the bearing part of the operation knob or button and the shaft part of the operation member fitted with the bearing part, such as a potentiometer (Japanese) : Shadow) is kept to a minimum, and by disposing the light source in the operation knob at a position closer to the light guide member, or on the shaft of the operation member, it is possible to reduce the length of the shaft of the operation part. Realizing the minimum range of component configuration or configuration can reduce the restrictions on component configuration and design, and suppress the difference in lighting brightness or lighting defects.

In order to solve the above-mentioned problems, a first aspect of the present invention is an illumination device for an operation unit, wherein a recess is formed on the panel at a position facing the opening of the operation knob, and a light guide member is arranged in the recess. , the light guide member is used to transmit and diffuse the light from the light emitting source to illuminate the back of the operation knob, the light guide member has a light receiving surface receiving the light from the light emitting source and an illuminating surface irradiating forward, and A first reflective surface and a second reflective surface that reflect light from the light receiving surface to the irradiating surface are formed, and the light emitting source is arranged so as to pass through the hole formed in the light guide member on the upper part of the bearing part of the operation knob. into the operating knob.

With the above-mentioned structure, the light from the light source is reflected and diffused from the outer periphery of the opening of the operation knob by using the light guide member, and the distance from the light source to the illuminated part, that is, the outer periphery of the operation knob can be increased indirectly. At the same time, the diffusion effect formed by the reflection can be used to obtain the effect of uniformly illuminating the illuminated part.

In addition, the present invention arranges the light source at the upper position of the bearing of the operation knob, even if it is a single light source, the light from the light source can be reflected and diffused by the light guide member on the back of the operation knob, and the light can be uniformized. It has the function of uniformly illuminating the illuminated part, and has the function of not being conspicuous even if the light is slightly uneven.

In addition, in the aforementioned first aspect of the present invention, at least one of the shaft portion of the operating member and the bearing portion of the operation knob fitted to the shaft portion is made of a transparent material.

With the above-mentioned structure, since the present invention allows the light emitted by the light emitting source disposed at a position deviated from the center of the shaft to pass through the shaft of the operation member and the bearing of the operation knob, the shadow of the shaft can be suppressed to a minimum, and the operation The light guide member at the opening of the knob performs reflection and diffusion, which has the effect of making the homogenized light more evenly illuminated.

In addition, the lighting device for an operation part according to the second aspect of the present invention is characterized in that the shaft part of the operation member and the bearing part of the operation knob are made of a transparent material, and any of the shaft part of the operation member and the bearing part of the operation knob is transparent. A light source is provided inside one side, and a light guide member for transmitting and diffusing light from the light source to illuminate the back surface of the operation knob is arranged between the operation knob and the panel.

With the above-mentioned structure, it is possible to achieve a minimum range of parts arrangement or configuration without lengthening the axis of the operation part, reduce parts arrangement and design restrictions, and suppress variations in illumination luminance or illumination defects.

In addition, in the first and second aspects of the present invention, at least one of the inner wall surface of the operation knob and the panel surface on the back of the light guide member is used as the reflective surface. And, it is characterized in that a part or all of the back surface of the light guide member including the first reflective surface and the second reflective surface is used as a surface that reflects light from the light source, and the outer peripheral portion of the front surface of the light guide member is used as a surface. Irradiated surface with matte finish.

With the reflective surface as described above, the light from the light emitting source can be efficiently reflected to the light guide member side, and attenuation of the light from the light emitting source can be suppressed.

In addition, in the first and second technical solutions of the present invention, it is characterized in that the light receiving surface of the light guide member that receives light from the light source faces the inside of the operation knob, and the light that is transmitted through the light guide member and diffused The front irradiating surface of the light source of the light guide component is located at the outer peripheral edge of the operation knob.

Furthermore, in the first and second aspects of the present invention, a through hole is provided in the operation knob, and the transmitted or diffused light is radiated from the through hole.

Also, in the aforementioned first and second aspects of the present invention, it is characterized in that the operation knob is an operation button.

In addition, in the aforementioned first and second technical solutions of the present invention, it is characterized in that the thickness of the inner peripheral portion of the light guide member is greater than the outer peripheral portion of the light guide member, and the inner peripheral portion of the light guide member enters into the inner side of the operation knob. formed to be thicker than the outer peripheral part and located inside the operation knob, the outer peripheral part of the light guide member is located on the outer peripheral part of the operation knob, and the outer peripheral edge of the outer peripheral part of the light guide member protrudes outward from the outer peripheral part of the operation knob A first reflective surface that reflects light from the light receiving surface radially outward of the light guide member is formed on the back side of the inner peripheral portion of the light guide member, and a first reflective surface is formed on the back side of the outer peripheral portion of the light guide member The second reflective surface that reflects the reflected light from the first reflective surface toward the irradiation surface side.

Description of drawings

FIG. 1 is a perspective view of an illuminating device according to Embodiment 1 of the present invention.

Fig. 2 is a side sectional view of the lighting device according to Embodiment 1 of the present invention.

Fig. 3 is a partially cutaway perspective view of the lighting device according to Embodiment 1 of the present invention.

Fig. 4 is a side sectional view of a lighting device according to Embodiment 2 of the present invention.

Fig. 5 is a partially cutaway perspective view of an illuminating device according to Embodiment 2 of the present invention.

Fig. 6 is a perspective view of a lighting device according to Embodiment 3 of the present invention.

Fig. 7 is a side sectional view of a lighting device according to Embodiment 3 of the present invention.

Fig. 8 is a partially cutaway perspective view of an illuminating device according to Embodiment 3 of the present invention.

Fig. 9 is a side sectional view of a lighting device according to Embodiment 4 of the present invention.

Fig. 10 is a partially cutaway perspective view of a lighting device according to Embodiment 4 of the present invention.

Fig. 11 is a schematic side sectional view of a conventional lighting device.

Fig. 12 is a sectional view taken along line A-A of Fig. 11 .

Fig. 13 is a schematic front view of a conventional lighting device.

Detailed ways

(Example 1)

Embodiment 1 of the present invention will be described below with reference to FIGS. 1 to 3 .

1 shows a perspective view of an illumination device for an operation portion according to Embodiment 1 of the present invention, FIG. 2 represents a side cross-sectional view of an illumination device for an operation portion according to Embodiment 1 of the present invention, and FIG. Partial cutaway perspective view.

In FIGS. 1 to 3 , 1 denotes an operation knob. The outer peripheral portion 1B of the operation knob 1 is provided on the outer peripheral edge of the disk-shaped front panel 1A, and has a cup shape. A cylindrical bearing portion 1D extending toward the opening portion 1C on the back side of the operation knob 1 is formed at the center of the back surface of the front panel 1A. In addition, although this operation knob 1 is produced as a molded article of synthetic resin, the material is not necessarily limited to synthetic resin. The opening 1C is preferably made of a transparent material, but the rest of the operation knob 1 (front plate 1A, outer peripheral portion 1B) is opaque except for the bearing portion 1D.

2 denotes a panel, which is fixed to the printed wiring board 5 with fixing screws 4 through the leg portions 3 . A circular concave portion 2A is formed on the panel 2, and a flange 2B is formed at the center of the rear panel 2a of the concave portion 2A, and the operating member 6 is mounted in a flange hole 2b of the flange 2B. In this embodiment, as the operating member 6, a potentiometer (hereinafter referred to as VR) is set as an example for description. Of course, the operating member 6 is not limited to the potentiometer, and may also be an operating member such as a variable capacitor or a push button switch. , the types of its components are not limited.

The shaft portion 6A of VR6 is fitted into the cylindrical bearing portion 1D of the operation knob 1 , and VR6 can be operated by rotating the shaft portion 6A by operating the knob 1 . The shaft portion 6A of VR6 is preferably made of a transparent material such as polycarbonate. By using a transparent material such as polycarbonate to make at least one of the above-mentioned bearing portion 1D and the shaft portion 6A of the VR6, the light emitted by the light-emitting source (light-emitting diode) 7 described later can be transmitted, and the light emission can be reduced. attenuation. The rear end of VR 6 is mounted on the printed wiring board 5 and connected to the wiring on the printed wiring board 5 .

The light-emitting diode 7 is supported on the front end of the rectangular support 8, and enters the operation knob 1 from the through hole 2c formed on the back panel 2a of the panel 2 on the upper part of the VR6 and the hole 9D of the light guide member 9. The light emitting diode 7 is located on the upper portion of the bearing portion 1D of the operation knob 1 , and is arranged in a shape to illuminate the inner surface of the operation knob 1 . In addition, the rear end of the support 8 of the light emitting diode 7 is fixed on the printed wiring board 5 on the upper part of the VR6. The above-mentioned embodiments have been described by using a light emitting diode as an example of the light emitting part, but of course the present invention is not limited to the light emitting diode. A light guide member 9 made of a translucent material is provided in the recessed portion 2A of the panel 2 facing the opening 1C of the operation knob 1 . The light guide member 9 is made of acrylic resin through which the light emitted from the LED 7 can be diffused. The light guide member 9 has a circular shape and is fitted into the concave portion 2A of the panel 2 . Inner peripheral portion 9A of light guide member 9 is thicker than outer peripheral portion 9B, and the thick portion of inner peripheral portion 9A is located inside operating knob 1 and outer peripheral portion 9B is located on the outer peripheral portion of operating knob 1 when viewed from the front. The front surface of the inner peripheral portion 9A of the light guide member 9 faces the inner side of the operation knob 1 and functions to receive the light receiving surface 9 a from the light emitting diode 7 . The outer peripheral edge 9b of the outer peripheral portion 9B of the light guide member 9 protrudes outward from the outer peripheral portion 1B of the operation knob 1, and the light transmitted through the light guide member 9 and diffused serves as an irradiation surface 9c for irradiating the front of the light guide member 9. role. The irradiated surface 9c is preferably given a matte finish. In addition, although acrylic resin is used as the material of the light guide member 9, it is not limited thereto, and other materials having light transmission properties may be used.

A hole 9D is formed in the central portion of the light guide member 9 for making the shaft portion 6A of the VR 6 and the holder 8 of the light emitting diode 7 protrude toward the operation knob 1 side. Further, a first reflective surface 9E is formed on the back side of the inner peripheral portion 9A of the light guide member 9 for reflecting light from the light receiving surface 9 a outward. The first reflection surface 9E has an inclination angle of 45 degrees with respect to the axis of the bearing portion 1D in order to reflect the light from the light receiving surface 9 a radially outward of the light guide member 9 . Further, a second reflective surface 9F is formed on the back side of the outer peripheral portion 9B of the light guide member 9, and reflects the reflected light from the first reflective surface 9E toward the irradiation surface 9c side. The second reflection surface 9F has an inclination angle of 50 degrees. In addition, the first reflective surface 9E and the second reflective surface 9F may be processed into a mirror surface, or the entire back side of the light guide member 9 may be processed into a mirror surface. However, it is not necessarily necessary to process these surfaces into mirror surfaces. The first reflective surfaces 9E, 9F are formed at inclination angles of 45 degrees and 50 degrees, but depending on the position or size of the irradiation surface 9c of the light emitting diode 7, in order to obtain effective reflection or light guide, the inclination angles are not limited to the above. Furthermore, it is preferable that at least one of the inner wall surface of the operation knob 1 and the surface of the panel 2 on the back of the light guide member is mirror-finished to form a reflective surface.

Next, the operation of the illuminating device for the operation portion configured as described above will be described. First, part of the light irradiated from the light emitting diode 7 is directly guided to the opening 1C on the back side of the operation knob 1 . Also, part of the light is reflected by the front panel 1A of the operation knob 1 and the inner wall of the outer peripheral portion 1B as shown by the irradiated reflected light ray α, and a part of the light is guided to the operation knob 1 through the bearing portion 1D and the shaft portion 6A made of a transparent material. Opening 1C on the back side. The light guided to the opening 1C enters the light guide member 9 from the light receiving surface 9a, is reflected by the first reflection surface 9E and the second reflection surface 9F, and is irradiated from the irradiation surface 9c side. Another part of the light is reflected and diffused in the light-transmitting light-transmitting light guide member 9, and is irradiated from the irradiation surface 9c side. In this way, the annular illumination visible portion (irradiation surface 9 c ) of the light guide member 9 can be uniformly illuminated from the back to the operation knob 1 .

As described above, according to this embodiment, by reflecting and diffusing the light from the point light source of the light emitting diode 7 toward the outer peripheral direction from the opening 1C on the back side of the operation knob 1, the light source from the light source to the illuminated portion, that is, the portion to be illuminated, can be increased indirectly. The distance between the outer peripheral parts of the operation knob 1 and the diffusion effect formed by the reflection in the light guide member 9 can be used to uniformly illuminate the part to be illuminated.

Moreover, by disposing the light emitting diode 7 on the upper portion of the bearing portion 1D of the operation knob 1, it is possible to give the impression that the light guide member 9 emits light uniformly to a person looking at the operation portion. That is, if only one light emitting diode 7 is provided on the operation knob 1, the portion of the light guide member 9 that is closer to the light emitting diode 7 becomes brighter, and becomes darker as it is farther away. Therefore, when the light emitting diode 7 is provided on the upper portion of the bearing portion 1D of the operation knob 1 , the upper portion of the light guide member 9 is bright, and the lower portion is darker than the upper portion. However, indoor lighting is usually irradiated from the upper part of the electronic equipment, so the user has a fixed idea that the upper part of the operation knob 1 is bright and the lower part is dark due to the shadow. In this way, actually, even if the upper part of the light guide member 9 is bright and the lower part is dark, a person who observes the operation part will have the illusion that the light guide member 9 is emitting light uniformly. Therefore, the method of disposing the light emitting diode 7 on the upper portion of the bearing portion 1D of the operation knob 1 is effective.

(Example 2)

Next, FIG. 4 shows a side sectional view of Example 2, and FIG. 5 shows a partially sectional perspective view of Example 2. As shown in FIG. In FIGS. 4 and 5 , in addition to the first embodiment, a reflection box 10 having a part of a truncated cone shape is provided inside the operation knob 1 . Other than that, it is the same as the illuminating device for the operation part of the first embodiment, and the reference numerals in the drawings are the same, and the details are omitted. The reflection box 10 has a structure in which a part made of synthetic resin uses the inner surface of a truncated conical plate body as a reflection surface. The inclined surface 10a of the truncated conical reflective box 10 effectively diffuses the light of the light emitting diode 7 to the opening 1C side of the operation knob 1 as shown by the irradiated reflected light β. The reflection box 10 does not necessarily have to be in the above-mentioned truncated cone shape, and may have a shape that reflects light toward the opening 1C of the operation knob 1 . In addition, the material of the reflection box 10 is synthetic resin, but it is not limited thereto, and may be other materials with reflection surfaces such as metal plates.

As described above, according to this embodiment, irrespective of the cross-sectional shape of the operation knob 1, there is an effect of efficiently reflecting and diffusing the light from the light source, and uniformly illuminating the illuminated portion.

(Example 3)

FIG. 6 is a perspective view of Embodiment 3 of the present invention, FIG. 7 is a side sectional view of Embodiment 3 of the present invention, and FIG. 8 is a partially cutaway perspective view of Embodiment 3 of the present invention.

In the third embodiment, the operation knob 1 and the printed wiring board 5 are the same as the lighting device for the operation part of the first embodiment, and the reference numerals in the drawings are the same, and the details are omitted.

In the third embodiment, the shaft portion 26A of the VR 26 is different from that in the first embodiment described above. The shaft portion 26A is made of a transparent material such as polycarbonate or a transmissive or diffusing material, and has a concave portion 26B opening toward the printed wiring board 5 side for embedding the light emitting diode 7 . The light emitting diode 7 is fitted into the concave portion 26B of the shaft portion 26A of the VR 26 .

The shaft portion 26A protrudes outward from the through hole 22c formed in the back plate 22a of the concave portion of the panel 22 and the central hole 29D formed in the light guide member 29, and fits into the bearing portion 1D of the operation knob 1. combine.

The light guide member 29 arranged between the operation knob 1 and the back panel 22a of the panel 22 has a slightly different shape from the light guide member 29 of the first embodiment, but it is different from the light guide member 9 of the first embodiment as described later. function is basically the same.

Next, the operation of the illuminating device for the operation portion configured as described above will be described. First, the light irradiated from the light emitting diode 7 passes through the transparent material or the shaft portion 26A of the VR6 having a transmission or diffusion function, and part of the light is directly reflected and diffused in the light guide member 29 and irradiated forward from the irradiation surface 29c. Another part of the light is reflected by the inner wall of the operation knob 1 as indicated by the irradiated reflected light ray α, and guided to the opening 1C of the operation knob 1 . Then, the light is reflected and diffused in the light guide member 29 having a transmission or diffusion function, and is irradiated forward from the irradiation surface 29c. In this way, the ring-shaped illumination visible part (29c) can be uniformly illuminated by the light irradiated by the light emitting diode 7.

As described above, according to this embodiment, by reflecting and diffusing light from the light emitting diode 7 from the opening 1C of the operating knob 1, the distance from the light source 7 to the illuminated portion, that is, the outer peripheral portion of the operating knob 1 can be increased indirectly. At the same time, the diffusion effect formed by reflection can be used to uniformly illuminate the illuminated portion 29C. Furthermore, by arranging the light emitting source 7 in the concave portion 26B of the VR 26 having a transparent material or a function of transmission or diffusion, it is possible to realize the arrangement or configuration of the smallest range of components.

(Example 4)

FIG. 9 shows a side cross-sectional view of Embodiment 4, and FIG. 10 shows a partially cut-away perspective view of Embodiment 4. As shown in FIG.

In the fourth embodiment, the panel 22 , VR 26 , the printed wiring board 5 , and the light guide member 29 are the same as those of the lighting device for the operation portion in the third embodiment, and the reference numerals in the drawings are the same, and details thereof are omitted. The operating knob 21 of the fourth embodiment is different from the third embodiment described above. The front plate 21A of the operation knob 21 is formed with three through-holes 21E connected in series, and the bearing portion 21D of the operation knob 21 made of a permeable or diffusing material such as acrylic resin is fitted inside the operation knob 21 . At the center of the bearing portion 21D, there is a cylindrical portion 21F into which the front end portion of the shaft portion 26A of the VR 26 fits, and a bottomed cylindrical body portion 21G is tightly fitted into the operation knob. A convex portion made of a permeable or diffusing material formed on the front side of the bearing portion 21D is fitted into the through hole 21E formed in the front plate 21A. In addition, although three through-holes 21E are arranged in series, it is not limited thereto, and any position or number may be used.

The lighting device for the operation part with the above-mentioned structure is the same as the third embodiment. The light from one light source of the light-emitting diode 7 passes through the shaft part 26A of the VR26, and directly enters the bearing part 21D of the operation knob 21 having a transmission or diffusion function. Or once it exits from the shaft portion 26A, it passes through the space in the operation knob 21 and injects into the bearing portion 21D of the operation knob 21 . Part of the light incident on the bearing portion 21D having a transmission or diffusion function of the operation knob 21 is directly emitted from the through hole 21E of the operation knob 21 to the outside of the operation knob 21 . Moreover, part of the light once directly irradiated inside the operation knob 21 is reflected randomly, and is radiated from the through hole 21E of the front plate 21A of the operation knob 21 by reflection or indirect light. In addition, the present embodiment also irradiates light from the outer peripheral edge of the light guide member 29, which is the same as the above-mentioned embodiment.

In Embodiment 3 and Embodiment 4 above, the first reflective surface and the second reflective surface may also be processed into mirror surfaces. In addition, the entire back side of the light guide member may be processed into a mirror surface. Preferably, at least one of the inner wall surface of the operation knob and the panel surface on the back of the light guide member is mirror-finished to form a reflective surface.

With the above configuration, light is also irradiated from the front panel 21A of the operation knob 21 . In addition, lighting is more effective as shown by irradiating reflected light β.

As described above, according to this embodiment, irrespective of the cross-sectional shape of the operation knob 21, there is an effect of efficiently reflecting and diffusing the light from the light source, and uniformly illuminating the portion to be illuminated.

Industrial use range

The present invention is an illuminating device for an operation portion of electronic equipment such as audio equipment and communication equipment, which reflects and diffuses light from a light source to uniformly illuminate an operation portion of an operation knob.

Claims (16)

1. lighting device for operating part, setting operation parts on the panel of electronic equipment, fitting operation knob on this functional unit is used to from the light of built-in light emitting source be thrown light in the back side of described operation knob, it is characterized in that,

Be formed with recess in the position relative described panel with peristome operation knob, in this recess, dispose light guide member, this light guide member is used to make from the light transmission diffusion of described light emitting source and to throwing light at the back side of operation knob, the shadow surface that this light guide member has the sensitive surface of the light of accepting self-emitting light source and forwards shines, and be formed with the light from described sensitive surface is reflexed to the 1st reflecting surface and the 2nd reflecting surface on the shadow surface, described light emitting source is configured to enter in the operation knob on the top of the bearing portion of operation knob from the hole that is formed on the light guide member.

2. lighting device for operating part as claimed in claim 1 is characterized in that, the axial region of functional unit and with at least one side of the bearing portion of the chimeric operation knob of described axial region be transparent material.

3. lighting device for operating part as claimed in claim 1 is characterized in that, with at least one side of the panel face at the inside wall of operation knob and the light guide member back side as reflecting surface.

4. lighting device for operating part as claimed in claim 1, it is characterized in that, the sensitive surface of light guide member of light that accepts self-emitting light source is towards the inside of operation knob, will see through in the light guide member and shadow surface that the light of diffusion shines to the place ahead of light guide member be positioned at the outer peripheral edges of operation knob.

5. lighting device for operating part as claimed in claim 4, it is characterized in that, to comprise the 1st reflecting surface and the 2nd reflecting surface in part or all of the interior light guide member back side as the face that the light that comes self-emitting light source is reflected, with the outer peripheral edges portion of light guide member front as the shadow surface of processing through tarnish.

6. lighting device for operating part as claimed in claim 1 is characterized in that, through hole is set on operation knob, makes the light that sees through or spread from this through hole radiation.

7. lighting device for operating part as claimed in claim 1 is characterized in that operation knob is an action button.

8. lighting device for operating part as claimed in claim 1, it is characterized in that, the thickness of the interior perimembranous of light guide member is greater than the peripheral part of light guide member, the interior perimembranous of light guide member enters to the inboard of operation knob and forms thickness greater than peripheral part and be positioned at the inboard of operation knob, the peripheral part of described light guide member is positioned at the peripheral part of operation knob, the outer peripheral edges of the peripheral part of described light guide member are protruded to foreign side from the peripheral part of operation knob, be formed with in the rear side of the interior perimembranous of light guide member and make, be formed with from the reverberation of the 1st reflecting surface the 2nd reflecting surface to the shadow surface lateral reflection in the rear side of the peripheral part of described light guide member from the light of sensitive surface the 1st reflecting surface to the radially foreign side reflection of light guide member.

9. lighting device for operating part, setting operation parts on the panel of electronic equipment, fitting operation knob on this functional unit is used to from the light of built-in light emitting source be thrown light in the back side of described operation knob, it is characterized in that,

The bearing portion of the axial region of functional unit and operation knob is a transparent material, inside the either party of the bearing portion of the axial region of these functional units and operation knob is provided with light emitting source, is used to make from the light transmission diffusion of described light emitting source and the light guide member that throws light in the back side of operation knob is disposed between described operation knob and the described panel.

10. lighting device for operating part as claimed in claim 9 is characterized in that, with at least one side of the panel face at the inside wall of operation knob and the light guide member back side as reflecting surface.

11. lighting device for operating part as claimed in claim 9, it is characterized in that, the sensitive surface of light guide member of light that accepts self-emitting light source is towards the inside of operation knob, will see through in the light guide member and shadow surface that the light of diffusion shines to the place ahead of light guide member be positioned at the outer peripheral edges of operation knob.

12. lighting device for operating part as claimed in claim 11 is characterized in that, with part or all of the light guide member back side as reflecting surface, with the outer peripheral edges portion of light guide member front as shadow surface through tarnish processing.

13. lighting device for operating part as claimed in claim 9 is characterized in that, forms recess at the panel surface that functional unit is installed, and disposes light guide member in this recess.

14. lighting device for operating part as claimed in claim 9 is characterized in that, through hole is set on operation knob, makes the light that sees through or spread from this through hole radiation.

15. lighting device for operating part as claimed in claim 9 is characterized in that, operation knob is an action button.

16. lighting device for operating part as claimed in claim 9, it is characterized in that, the thickness of the interior perimembranous of light guide member is greater than the peripheral part of light guide member, the interior perimembranous of light guide member enters to the inboard of operation knob and forms thickness greater than peripheral part and be positioned at the inboard of operation knob, the peripheral part of described light guide member is positioned at the peripheral part of operation knob, the outer peripheral edges of the peripheral part of described light guide member are protruded to foreign side from the peripheral part of operation knob, be formed with in the rear side of the interior perimembranous of light guide member and make, be formed with from the reverberation of the 1st reflecting surface the 2nd reflecting surface to the shadow surface lateral reflection in the rear side of the peripheral part of described light guide member from the light of sensitive surface the 1st reflecting surface to the radially foreign side reflection of light guide member.

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