JP2008016332A - Illumination device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illumination device capable of reducing the assembling man-hours, in related parts when being used as an illumination source for illuminating a design part of an operation system parts from the rear face. <P>SOLUTION: A rotary adjustment knob 5, when operating in actuating various kinds of vehicular equipment, is installed at the center cluster in a car. A tabular light guide plate 20 is installed at the rear face of the outer frame 4 comprising the outer wall of the center cluster, a through-hole 21 is formed in this light guide plate 20, and the adjustment knob 5 is arranged there in a turnable state. A light guide 16 is built in the adjustment knob 5, and an LED 15 is arranged at the rear-face position of the adjustment knob 5. When the LED 15 irradiates light, this irradiated light is guided to the light guide plate 20 via the light guide 16. Then, since by having the light guide plate 20 carry out surface emission by this light, a switch rear face is irradiated, and the design part 6 for switch function display comprising a diffusion material, installed at the outer frame 4, goes into a turned-on state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an illumination device that guides light from a light source to a light guide member and irradiates the light.

Conventionally, a center cluster of a vehicle has been provided with a switch group that is operated when operating an air conditioner, a car navigation device, an audio device, and the like. In these in-vehicle switches, an illuminating device is provided on the back surface of the switch operation unit to enhance the visibility of the switch position by illuminating the periphery of the switch from the back side when the driving light of the vehicle is turned on. As this type of lighting device, for example, as shown in Patent Document 1, light from a light source disposed on an end surface of a light guide (light guide plate) is emitted by a fine concavo-convex structure provided on the bottom surface of the light guide. There is a side view type that scatters or reflects and emits the scattered light or reflected light with the upper surface of the light guide as a light emitting surface.
JP-A-8-194219

  However, in the technique of Patent Document 1, the switch operation unit and the light guide are provided as separate components. Therefore, when assembling the in-vehicle switch, it is necessary to attach these parts in separate processes, and there is a problem that the assembling process is troublesome. In addition, when the switch operation unit and the light guide are separate, it leads to a problem that the number of parts required for the in-vehicle switch increases, and a problem that an arrangement space is required accordingly.

  An object of the present invention is to provide an illuminating device that can reduce the number of assembling steps in parts related thereto when a design portion of an operation system part is used as an illumination source for illuminating from the back.

  In order to solve the above problems, in the present invention, by being provided on the back surface of the design part of the operation system part, the light irradiated from the light source is guided by the light guide part, and the design part is illuminated from the back side. The gist of the illumination device for lighting the design portion is that the operation portion serving as the operation location of the operation system component and the light guide portion serving as the light path are integrally formed.

  According to this configuration, if the light guide part and the operation part are integrally formed, when assembling the operation system parts having the light guide part, it is not necessary to attach these parts in separate steps. It becomes possible to simplify the process.

The gist of the present invention is that the light source is disposed on a back surface of the operation unit, and the light guide unit guides the light emitted from the light source to the design unit by bypassing the operation unit. .
According to this configuration, since the light source is arranged on the back surface of the operation unit, it is not necessary to arrange the light source and the operation unit in parallel, and the apparatus size in that direction can be reduced.

  The gist of the present invention is that at least a part of the periphery of the light guide portion on the back surface of the design portion is provided with a light guide that performs the illumination by surface emitting light introduced from the light guide portion. To do.

According to this configuration, since illumination is performed by causing a member having a large area called a light guide to emit light, it is possible to perform illumination over a wide range.
In the present invention, a hole is formed in the light guide, the operation part is disposed in the hole, and the light guide part provided in the operation part faces the light guide in the hole. This is the gist.

  According to this configuration, the operation unit is disposed in the hole formed in the light guide, and the light emitted from the light source and passed through the light guide unit is guided from the light guide unit to the light guide unit and guided by the light. Illumination is performed by the light body emitting light. By the way, when the hole is formed in the light guide, if the light source is disposed at a side position of the light guide, the hole becomes an obstacle to the light guide, and the position of the light guide opposite to the light source of the hole There is a case where the light does not spread through and the position becomes dark. However, as in the present invention, if a light source is arranged on the back surface of the operation unit arranged in the hole and light is applied from the back surface of the operation unit, the surroundings of the operation unit are illuminated. Even in a light guide having a hole, luminance unevenness can be made difficult to occur.

  The gist of the present invention is that a light diffusing portion for diffusing the light when the light guided by the light guide portion passes through the light guide is provided at a position facing the light guide portion in the light guide. And

  According to this configuration, when the irradiation light from the light guide portion is introduced into the light guide, the light is diffused by the light diffusion portion. Therefore, even if the intensity of light emitted from the light guide unit toward the light guide is different for each part, the amount of incident light can be made uniform, which is effective in reducing luminance unevenness. .

The gist of the present invention is that the light guide part is formed with a light reflection part that reflects light guided from the light source into the light guide part toward the design part.
According to this configuration, the light introduced from the light source into the light guide portion is reflected by the light reflecting portion toward the design portion, so that a large amount of light component toward the design portion can be taken. Accordingly, since it is possible to secure the amount of light necessary for illumination, it is difficult for a situation where luminance is insufficient to occur when illumination is performed, and this is effective in suppressing luminance unevenness.

The gist of the present invention is that the operation system component is a rotary type that switches a contact state by rotating the operation section.
According to this configuration, even if the operation part of the operation system part is operated, the distance between the light source arranged on the back side of the operation part and the light guide part incorporated in the operation part can be made unchanged. is there. Accordingly, it is possible to prevent the amount of light introduced from the light source to the light guide portion from being changed before and after the operation of the operation unit, which can suppress a change in luminance before and after the operation of the operation unit. It becomes.

  According to the present invention, when the design part of the operation system part is used as an illumination source for illuminating from the back, the number of assembling steps can be reduced in parts related to the design part.

Hereinafter, an embodiment of a lighting device embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, the center cluster 1 in the vehicle is provided with a switch group 2 as an operation location to be operated when operating various in-vehicle devices such as an in-vehicle air conditioner, a car navigation device, and an in-vehicle audio device. The switch group 2 includes a plurality of on-vehicle switches 3, 3... Provided for each switch function. A resin outer frame 4 that forms the outer wall of the center cluster 1 is provided with an adjustment knob 5 that is an operation part of each in-vehicle switch 3 in a rotatable state. The in-vehicle switch 3 is a rotary switch whose switch contact is switched by rotating the adjustment knob 5. The in-vehicle switch 3 corresponds to an operation system component, and the adjustment knob 5 corresponds to an operation unit.

  As shown in FIGS. 1 and 2, a design portion 6 is formed in the outer frame 4 of the center cluster 1 in the vicinity of the adjustment knob 5 so as to represent each switch function and to be turned on by irradiation light from the back surface. Yes. The design portion 6 is made of a layered material using, for example, a transparent resin such as acrylic, styrene, or urethane while the other portion of the outer frame 4 (substantially the entire area of the center cluster 1) is made of a colored resin material such as black. As shown in FIG. 2, it has a function of diffusing light received by itself in multiple directions and emitting it to the outside. Moreover, the design part 6 is formed integrally with other parts in the outer frame 4 by a manufacturing method such as two-color molding. The design part 6 corresponds to a design part.

  As shown in FIG. 2, the adjustment knob 5 includes a large-diameter knob portion 7 exposed to the outside from the outer frame 4 as a knob portion, and a shaft portion 8 having a smaller diameter and a cylindrical shape. The outer frame 4 is provided with a storage hole 9, and the adjustment knob 5 is in an attached state in which the shaft portion 8 is inserted into the storage hole 9 so as to be relatively rotatable. The adjustment knob 5 is configured not to fall out from the outer frame 4 by a retaining mechanism (not shown).

  A substrate 10 on which various electronic components of the in-vehicle switch 3 are mounted is provided on the back surface of the outer frame 4. A fixed contact 11 is provided on the substrate 10 as a switch contact on the fixed side. As shown in FIG. 3, the fixed contact 11 includes a ring-shaped first fixed contact portion 11a located near the center, and a plurality of intermittent contacts arranged at predetermined intervals along the outer periphery of the first fixed contact portion 11a. The second fixed contact portion 11b. A movable contact 12 that rotates with the adjustment knob 5 is provided at a position facing the substrate 10 on the lower surface of the adjustment knob 5. The movable contact 12 has a substantially rectangular shape in cross section, and one end contacts the first fixed contact portion 11a and the other end contacts the second fixed contact portion 11b.

  As shown in FIG. 2, a substantially box-shaped support 13 having an opening on the substrate 10 side is attached to the substrate 10 so as to accommodate the fixed contact 11 and the movable contact 12 therein. A circular through hole 14 is formed at the center position of the support 13, and the movable contact 12 faces the fixed contact 11 through the through hole 14. A step portion 14 a having a height that is one step lower than the surface of the support 13 is formed on the entire periphery of the through hole 14. On the stepped portion 14a, the lower end portion of the adjustment knob 5 is placed so as to be relatively rotatable. When the adjustment knob 5 is rotated, the movable contact 12 is also rotated along with the rotation of the adjustment knob 5, and the contact point of the movable contact 12 is selectively switched at the first fixed contact portion 11a. The switch operation position of is switched.

  On the substrate 10, an LED (Light Emitting Diode) 15 that irradiates light to the design unit 6 from the back surface of the outer frame 4 is mounted. The LED 15 is arranged in the direction of irradiating light in a direction perpendicular to the substrate 10 (upward in FIG. 2) and on the same axis as the adjustment knob 5 at the back position of the adjustment knob 5. The LED 15 corresponds to a light source.

  As shown in FIGS. 2 and 4, a light guide 16 that guides the light emitted from the LED 15 to the design portion 6 is integrally incorporated in the shaft portion 8 of the adjustment knob 5. The light guide 16 is made of a transparent resin such as an acrylic resin. The light guide 16 has a substantially T-shaped longitudinal section, and a columnar first light path 18 extending from a substantially intermediate position in the longitudinal direction of the shaft portion 8 to the light guide opening 17 at the lower end portion along the axis L1. The second optical path 19 has a substantially disc shape extending outward in the radial direction over the entire circumference at a substantially intermediate position in the longitudinal direction of the shaft portion 8. The light guide 16 is formed by a two-color molding method for the main body portion of the adjustment knob 5 made of, for example, black resin.

  A light guide plate 20 made of a transparent resin such as polymethyl methacrylate (PMMA) and having a flat plate shape is provided at the back surface of the outer frame 4. An insertion hole 21 through which the shaft portion 8 of the adjustment knob 5 can be inserted in a relatively rotatable state is provided in a portion of the light guide plate 20 where the adjustment knob 5 is located. In this attached state, the second light path 19 of the light guide 16 takes an arrangement position facing the inner peripheral surface of the insertion hole 21 of the light guide plate 20. The light guide 16 corresponds to the light guide portion, the light guide plate 20 corresponds to the light guide, and the insertion hole 21 corresponds to the hole portion.

  As shown in FIG. 2, an in-guide reflection portion 22 having a substantially conical shape is formed on the surface of the light guide 16 on the knob portion 7 side (upper surface in FIG. 2). The in-guide reflecting portion 22 transmits light propagating from the LED 15 in the light guide 16 in the axial direction of the light guide 16 (vertical direction in FIG. 2) toward the light guide plate 20 (horizontal direction in FIG. 2). Reflection (including diffusion, dispersion, refraction, total reflection, etc .: hereinafter the same). The guide reflection part 22 corresponds to a light reflection part.

  As shown in FIG. 5, in the light guide plate 20, a concave and convex portion 23 having a textured shape is formed on the inner peripheral surface of the insertion hole 21 over the entire circumference. The uneven portion 23 scatters light incident on the light guide plate 20 from the light guide 16 and uniforms the amount of light in the incident light, thereby suppressing luminance unevenness when the design portion 6 is illuminated. Note that the uneven portion 23 corresponds to a light diffusion portion.

  A large number of dot-shaped concave dots 24 are formed on the bottom surface 20a of the light guide plate 20 as shown in FIG. The concave dots 24 are formed as fine dots in units of μm, and are arranged at a position where the light guide plate 20 wants to emit light (that is, the design portion 6). The concave dots 24 have a conical shape having a tapered shape that converges from the bottom surface 20a of the light guide plate 20 toward the top surface 20b. In FIG. 6A, the concave dots 24 are shown deformed larger than the actual size. As shown in FIG. 6B, the light guide plate 20 reflects the light incident from the light guide 16 by the concave dots 24 on the bottom surface 20a, and causes the light from the LEDs 15 to emit light by using the top surface 20b as a light emitting surface.

Next, the operation of the illumination device of this example will be described.
For example, when the driver turns on a vehicle width lamp or a traveling light of the vehicle, the LED 15 located below the adjustment knob 5 enters a light emitting state, and emits light upward as shown in FIG. At this time, the irradiation light of the LED 15 is introduced into the light guide 16 from the light guide port 17 of the light guide 16 on the lower end surface of the adjustment knob 5. The light propagating upward in the light guide 16 generates a component that comes into contact with the in-guide reflection portion 22 in the light guide 16, and the reflected light propagates in the light guide 16 while changing the traveling direction in the left-right direction. .

  In the light guide 16, the light reflected by the guide reflection part 22 is introduced from the light guide 16 to the light guide plate 20. At this time, since the uneven portion 23 is formed in the insertion hole 21 of the light guide plate 20, when the light emitted from the light guide 16 enters the light guide plate 20, this light is scattered by the uneven portion 23. . Therefore, even if there is a partial difference in the amount of light emitted from the light guide 16, the light is scattered by the concavo-convex portion 23, so that the amount of light incident on the light guide plate 20 is made uniform. Is planned.

  The light guided from the light guide 16 to the light guide plate 20 is reflected upward by contacting a plurality of concave dots 24 on the bottom surface of the light guide plate 20. At this time, the higher the density distribution of the concave dots 24, the greater the amount of light reflected upward. Thus, since the light guide plate 20 emits light on the upper surface 20b by the light guided into the light guide plate 20, the adjustment knob 5 is illuminated with light around it, and each switch 3 , ... design part 6, ... receives light from the back and is turned on.

  In this example, since the light guide 16 is integrally incorporated in the adjustment knob 5, when assembling the in-vehicle switch 3, it is not necessary to attach these parts in separate processes, so that the assembly process is simplified. Can be achieved. Also, if the light guide 16 is integrated with the adjustment knob 5, the effects of reducing the number of parts required for the in-vehicle switch 3, simplifying the structure of the in-vehicle switch 3, and reducing the space for arranging the parts required for the in-vehicle switch 3 can be achieved. Can occur.

  By the way, in this type of vehicle field, space saving of component arrangement positions is required at a high level. Therefore, when this type of lighting device is employed in a vehicle, the insertion hole is formed in the light guide plate 20 as in this example. In many cases, a structure in which the adjustment knob 5 is disposed in the insertion hole 21 is provided. If this arrangement structure is used, it becomes possible to place the adjustment knob 5 (various parts of the switch mechanism) in a space where only the light guide plate 20 is usually arranged, and the in-vehicle switch 3 (including the lighting device) correspondingly. It is possible to reduce the size.

  However, as shown in FIG. 8, the LED 15, which is a separate body from the light guide plate 20 (including the light guide 16), is arranged on the side portion of the light guide plate 20, and the light of the LED 15 irradiated from that position is used as the light guide plate 20. In the irradiation structure (side view type) that leads to the inside of the light guide plate, when the insertion hole 21 is provided in the light guide plate 20 and the adjustment knob 5 is disposed there, propagation of light from the LED 15 is hindered by the insertion hole 21. become. Therefore, the amount of light transmitted to the position (dot area in FIG. 8) hidden in the insertion hole 21 when viewed from the LED 15 in the light guide plate 20 is reduced. For this reason, there is a possibility that the luminance at the position hidden in the insertion hole 21 when viewed from the LED 15 in the light guide plate 20 may be lower than other portions or may not emit light at that position. This causes a problem that uniform surface light emission cannot be obtained.

  Therefore, in this example, the light guide 16 is built in the adjustment knob 5 penetrating the insertion hole 21 of the light guide plate 20, and the LED 15 is disposed below the adjustment knob 5, so that the light guide 16 is positioned below the adjustment knob 5. An irradiation structure (top view type) is adopted in which the irradiated light is guided upward, the surface of the light guide plate 20 emits light, and the light is spread around the adjustment knob 5. Therefore, even when the light guide plate 20 has the shape of the insertion hole 21, it is possible to bring a substantially fixed amount of light around the insertion hole 21. Generation | occurrence | production can be suppressed low and it becomes possible to light-emit the light-guide plate 20 substantially uniformly.

According to the configuration of the present embodiment, the following effects can be obtained.
(1) Since the adjustment knob 5 and the light guide 16 are integrated, it is not necessary to attach the adjustment knob 5 and the light guide 16 in separate steps when assembling the in-vehicle switch 3 to the vehicle body. Simplification can be achieved.

  (2) Since the LED 15 serving as the light source is arranged at the back of the adjustment knob 5, for example, the size of the in-vehicle switch 3 in the horizontal direction can be reduced compared to a side view type in which the LED 15 is aligned with the adjustment knob 5 in the horizontal direction. it can.

  (3) Since the switch illumination is performed by causing the light guide plate 20 to emit light, the back surface of the design unit 6 is illuminated in a large area. Even if the design unit 6 has a large area, this is illuminated from the back surface. Can be illuminated.

  (4) If the insertion hole 21 is formed in the light guide plate 20 and the adjustment knob 5 is arranged there, the efficiency of arrangement space of the components can be improved, but the insertion hole 21 affects the light guide. Become. However, if the LED 15 is arranged at the back of the adjustment knob 5 and the light emitted from the LED 15 is guided by the light guide 16 in the adjustment knob 5 to perform switch illumination, the LED 15 is almost the same around the insertion hole 21. An amount of light spreads and the periphery of the insertion hole 21 shines with substantially the same amount of light. Therefore, even if the insertion hole 21 is formed in the light guide plate 20, it contributes to the uniform surface light emission of the light guide 16, and the occurrence of uneven brightness can be suppressed.

  (5) Since the in-guide reflection portion 22 is formed in the light guide 16, most of the light components in the light guide 16 are reflected in the direction toward the light guide plate 20. Therefore, most of the light components in the light guide 16 can be introduced into the light guide plate 20, and effects such as ensuring high luminance and suppressing luminance unevenness can be obtained.

  (6) Since the uneven portion 23 is formed in the insertion hole 21 formed in the light guide plate 20, the light introduced from the light guide 16 to the light guide plate 20 is scattered by the uneven portion 23. Therefore, even if the light emitted from the light guide 16 is partially strong or weak, the amount of light in the light introduced into the light guide plate 20 is made uniform by scattering of the light at the concavo-convex portion 23. Highly effective in suppressing brightness unevenness.

  (7) The concave dots 24 are formed on the bottom surface 20 a of the light guide plate 20, and the light introduced into the light guide plate 20 is reflected by the concave dots 24. Accordingly, it is possible to obtain as much light component as possible upward in the light component introduced into the light guide plate 20, and to cause the light guide plate 20 to emit light in a state where the luminance is as high as possible. Is also effective.

  (8) Since the on-vehicle switch 3 of this example is a rotary switch that rotates the adjustment knob 5 when changing the switch state, the position of the LED 15 and the light guide 16 in the vertical direction before and after the operation of the adjustment knob 5, The positions of the light guide 16 and the light guide plate 20 do not change. Accordingly, it is difficult for the luminance applied to the design unit 6 to change before and after the operation of the adjustment knob 5, and it is possible to prevent a situation in which the brightness of the design unit 6 changes before and after the operation of the adjustment knob 5. .

In addition, this embodiment is not limited to the structure so far, You may change into the following aspects.
The light guide opening 17 of the light guide 16 into which the light from the LED 15 enters is not limited to a simple planar shape. For example, as shown in FIG. 9, the lens portion 41 may be formed by making the light guide opening 17 spherical. In this case, the light emitted from the LED 15 is reflected in the direction toward the inside of the light guide 16 by the lens unit 41, so that a large amount of light that can be guided to the inside of the light guide 16 can be obtained, which is also effective in suppressing luminance unevenness. There is. Moreover, the shape of the light guide opening 17 may be a pair of tapered slope portions 42 facing each other as shown in FIG. 10, for example.

  The design part of the on-vehicle switch 3 is not limited to the design part 6 formed on the outer frame 4 of the center cluster 1. For example, as shown in FIG. 11, the light guide 16 is extended to the axial center position on the knob portion 7 side (upper portion) of the adjustment knob 5 to form the third light path 43, and the third light is placed on the upper surface of the adjustment knob 5. A structure may be employed in which a design part 44 connected to the path 43 is provided, and the design part 44 is illuminated from the back by the light guided through the third light path 43. In this case, the design forming part of the adjustment knob 5 is increased, and a large number of design variations can be obtained.

  The irradiation device that irradiates the design unit 6 of the in-vehicle switch 3 from the back does not necessarily require the light guide plate 20. For example, as shown in FIG. 12, the second light path of the light guide 16 may be extended in the horizontal direction to form an extension part 45, and a structure that directly guides light from the extension part 45 to the design part 6 may be adopted. Good. In this case, the in-vehicle switch 3 does not require the light guide plate 20, and the size of the device can be reduced and the component cost can be reduced accordingly.

  The shape of the light guide 16 is not limited to the vertical section T-shape formed by the first light path 18 and the second light path 19, but is a shape that can guide the light of the LED 15 to the light guide plate 20, such as a vertical section L-shape. If there is, the shape is not particularly limited.

  The arrangement structure when arranging the adjustment knob 5 with respect to the light guide plate 20 is not limited to the structure in which the insertion knob 21 is formed in the light guide plate 20 and the adjustment knob 5 is arranged there. For example, when the LED 15 is disposed at a position closer to the outside of the light guide plate 20, an arrangement structure may be adopted in which a notch is formed in the light guide plate 20 and the adjustment knob 5 is disposed in a rotatable state. Good.

  The shape of the in-guide reflection portion 22 provided in the light guide 16 is not necessarily limited to the conical shape, and the shape is not particularly limited as long as the light in the light guide 16 can be guided to the light guide plate 20.

  -You may provide the prism part which comprises uneven | corrugated shape in the perimeter or a part in the side surface of the light-guide plate 20. FIG. In this case, since light leakage from the side surface of the light guide plate 20 is suppressed by the prism portion, the effect of securing the light emission luminance when the light guide plate 20 emits light is high.

In the case where the concave dots 24 are provided on the bottom surface 20a of the light guide plate 20, the formation ratio can be appropriately changed in each place according to the light irradiation position and the luminance level.
-A light source is not necessarily limited to LED15, A lamp | ramp etc. may be used as another light source.

  The lighting device of this example is not limited to being used as a backlight for switch parts that illuminate the design portion 6 of the switch group 2 (vehicle-mounted switch 3) from the back, but can be used as an illumination source for various devices and apparatuses. is there.

Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.
(1) In any one of Claims 1-7, the inlet which reflects the irradiation light of the said light source toward the inside of the said light guide part in the inlet which the light from the said light source is introduce | transduced in the said light guide part A reflection part was provided. In this case, it is possible to send most of the light components from the light source into the light guide, which is also highly effective in suppressing luminance unevenness.

  (2) In any one of Claims 1-7, the said design part is formed in the surface position of the said operation part. In this case, since the surface of the operation unit can emit light as a design surface, the surface of the operation unit can also be used as a design surface, which is highly effective in improving the degree of freedom in design.

  (3) In any one of Claims 3-7, the light-guide plate side light reflection part which reflects the light guide | induced to the inside of the said light guide toward the said design part was provided in the bottom face of the said light guide. . In this case, since a large amount of light components reaching the light emitting surface can be obtained, the light emission luminance can be increased.

  (4) In any one of Claims 3-7, the notch part is formed in the said light guide, the said operation part is arrange | positioned in the said notch part, and the said light guide part provided in the said operation part is said notch part And faced the light guide. In this case, it becomes possible to arrange the operation section in the arrangement space of the light guide, which further contributes to downsizing of the lighting device.

The perspective view which shows the center cluster vicinity in the vehicle in one Embodiment. The longitudinal cross-sectional view of the vehicle-mounted switch provided with the top view type illuminating device. The top view which shows the switch contact of a vehicle-mounted switch. The perspective view of the adjustment knob of a vehicle-mounted switch. The top view of the light-guide plate which shows the reflective state of the light introduce | transduced into a light-guide plate from a light guide. (A) is a longitudinal cross-sectional view of a light-guide plate, (b) is a perspective view which shows the state which the light-guide plate surface-emitted. Explanatory drawing showing the optical path when a vehicle-mounted switch is illuminated with an illuminating device. The top view of the vehicle-mounted switch provided with the side view type illuminating device. The fragmentary longitudinal cross-sectional view of the vehicle-mounted switch in another example. The fragmentary longitudinal cross-sectional view of the vehicle-mounted switch in another example. The longitudinal cross-sectional view of the vehicle-mounted switch in another example. The longitudinal cross-sectional view of the vehicle-mounted switch in another example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 3 ... Vehicle-mounted switch as operation system component, 5 ... Adjustment knob as operation part, 6 ... Design part as design part, 15 ... LED as light source, 16 ... Light guide as light guide part, 20 ... Light guide As a light guide plate, 21... Insertion hole as a hole portion, 22... In-guide reflection portion as a light reflection portion, 23.

Claims (7)

In the illumination device that is provided on the back of the design part of the operation system part, guides the light emitted from the light source with the light guide part, and lights the design part by illuminating the design part from the back side,
An illuminating device characterized in that an operation portion serving as an operation location of the operation system component and the light guide portion serving as a light path are integrally formed.   The light source is disposed on a back surface of the operation unit, and the light guide unit guides the light emitted from the light source to the design unit by bypassing the operation unit. The lighting device described.   The light guide which performs the said illumination by surface-emitting the light introduced from the said light guide part in the at least one part of the circumference | surroundings of the said light guide part in the back surface of the said design part is provided. Or the illuminating device of 2.   A hole portion is formed in the light guide body, the operation portion is disposed in the hole portion, and the light guide portion provided in the operation portion faces the light guide body in the hole portion. The lighting device according to claim 3.   2. A light diffusing portion for diffusing the light guided by the light guide portion when passing through the light guide at a position facing the light guide portion in the light guide. The lighting device according to 3 or 4.   The light guide part is formed with a light reflection part that reflects light guided from the light source into the light guide part toward the design part. The lighting device described in 1.   The illumination device according to claim 1, wherein the operation system component is a rotary type that switches a contact state by rotating the operation unit.

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