JP2012045992A - Vehicle interior lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle interior lamp having superior visibility and operability of a touch switch, even at night.SOLUTION: The vehicle interior lamp includes: an interior illumination light source 14 provided inside a case 12 fixed to a vehicle interior; a translucent cover 16 provided at an opening part of the case 12; a translucent electrode film 18 formed at a side of the translucent cover 16 facing the light source 14; and an illumination power supply control part connected to the electrode film 18 and lighting on/off the light source 14 on the basis of the capacitance change between a human body and the electrode due to contact of a hand with the translucent cover 16. In the vehicle interior lamp, a second light source 32 is disposed in the case 12. By the light emission of the second light source 32, the translucent cover 16 as a touch switch is visible from the vehicle interior. Because the touch switch (translucent cover 16) emits light irrespective of whether it is day or night, the touch switch has superior visibility and operability.

Description

  The present invention relates to a vehicle interior illumination lamp that illuminates a vehicle interior, and more particularly to a vehicle interior illumination lamp that uses a translucent cover that covers a light source for illumination as a touch switch.

  As shown in Patent Document 1 below, an illuminating lamp for illuminating the vehicle interior is provided on the ceiling surface of the vehicle interior.

  In Patent Document 1 below, a housing fixed to a vehicle interior, a light source disposed inside the housing, a translucent cover disposed in an opening formed on the vehicle interior side of the housing, A translucent electrode film formed on the side of the light cover that is desired for the light source, and a static electricity between the electrode and the human body when the human body touches the vehicle interior side surface of the translucent cover. An interior illumination lamp is described that includes an illumination power supply control unit that turns on and off a light source based on a change in electric capacity.

  The illumination lamp can be turned on and off simply by touching the translucent cover that functions as a touch switch.

JP 2007-230450 A (paragraphs 0011 to 0014, FIGS. 1 to 3)

  In Patent Document 1, since the operation area as a touch switch is large, the characteristic that the switch is easy to see (hereinafter referred to as switch visibility) and the characteristic that the switch is easy to operate (hereinafter referred to as switch operability) are large. Looks like it has improved.

  However, even at night or in the daytime, it is difficult to see where the interior illumination lamp (translucent cover) that functions as a touch switch is located because the vehicle interior is dim in the rear seat. For this reason, there has been a problem that it is necessary to improve visibility and operability of the switch under such conditions.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a vehicle interior illumination lamp that is excellent in visibility and operability of a touch switch even at night.

In order to achieve the above object, in a vehicle interior illumination lamp according to the present invention, a housing fixed to a vehicle interior, a light source for interior illumination disposed inside the housing, A translucent cover disposed in an opening formed on the passenger compartment side, a translucent electrode film formed on a side desired by the light source of the translucent cover, connected to the electrode film,
An illumination power supply control unit that turns on and off the light source based on a change in capacitance between the electrode and the human body when a part of a human body such as a hand contacts a vehicle interior side surface of the translucent cover; In the vehicle interior lighting with
A second light source is disposed in the casing, and the light-transmitting cover is configured to be visible by the light of the second light source.

  The translucent electrode film is formed on the translucent cover by printing, painting, vapor deposition, or sputtering.

  (Operation) Since the translucent cover that functions as a touch switch is illuminated by the light of the second light source in the housing, the touch switch (the translucent cover) can be visually recognized from the passenger compartment. Touch to the cover becomes easy.

  According to a second aspect of the present invention, in the vehicle interior illumination lamp according to the first aspect, the second light source incident from the light incident portion between the second light source and the translucent cover. A light guide member is provided that guides light by internal reflection and emits the light from the light emitting portion toward the passenger compartment, and emits light in a predetermined region of the translucent cover that functions as a touch switch.

  (Operation) The light emitting portion of the light guide member emits light in a predetermined region of the translucent cover that functions as a touch switch, for example, in the vicinity of the electrode film formation region in the translucent cover. Since the predetermined area of the translucent cover emits light by the light emitted from the light emitting portion of the light guide member (light of the second light source), the touch switch (the translucent cover) looks bright regardless of day or night from the vehicle interior. Thus, it is easy to touch the touch switch (translucent cover) (lighting operation of the interior lighting).

  Then, as a specific configuration of the light guide member that emits light in a predetermined region of the translucent cover, as shown in claim 3, the translucent cover is configured by an outer lens and disposed inside the outer lens. A case where the light guide member is integrally formed with the inner lens and a case where the light guide member is integrally formed with the translucent cover as shown in claim 4 are conceivable.

  That is, when the electrode film is exposed to a high temperature for a long time, the electrode film may be deteriorated. For this reason, when the illumination light source is composed of a bulb having a relatively large calorific value, such as an incandescent bulb, an inner lens is provided between the electrode film and the illumination light source, as shown in claim 3, It is desirable that the heat generation (radiant heat) of the light source is not directly transmitted to the electrode film. On the other hand, when the illumination light source is composed of a light source that has a relatively small amount of heat generation such as a light emitting diode, it is not necessary to consider the influence of the heat generation (radiation heat) of the light source on the electrode film. As shown in FIG. 2, it is not necessary to provide an inner lens that covers the light source.

  According to a third aspect of the present invention, in the vehicle interior illumination lamp according to the second aspect, the translucent cover is formed of an outer lens, and the light guide member is integrally formed with an inner lens disposed inside the outer lens. It was configured as follows.

(Operation) The inner lens disposed between the outer lens and the light source for room illumination suppresses the transmission of heat (radiant heat) to the electrode film when the light source is turned on.
For example, the light incident part side of the light guide member extends from the side edge of the inner lens, and the inner lens constitutes a part of the light guide member (light emitting part). That is, the light incident on the side edge of the inner lens through the light guide member is guided through the inner lens functioning as the light guide member, and is directed from the light emitting portion provided at a predetermined position of the inner lens to the outer lens side. Exit.
In addition, when the inner lens is molded, the light guide member can be integrated with the inner lens.

  According to a fourth aspect of the present invention, in the vehicle interior illumination lamp according to the second aspect of the present invention, the light guide member is formed integrally with the translucent cover.

  (Operation) When a light source having a relatively small calorific value, such as a light-emitting diode, is used as a light source for indoor illumination, it is not necessary to consider the influence of heat generation (radiant heat) on the electrode film when the illumination light source is turned on. Therefore, it is not necessary to provide an inner lens that covers the illumination light source as in the third aspect, and the number of components of the lamp can be reduced accordingly, and the depth of the lamp can be reduced.

  For example, the light incident part side of the light guide member extends from the side edge of the light transmissive cover, and the light transmissive cover constitutes a part of the light guide member (light emitting part). That is, light incident on the side edge of the translucent cover through the light guide member is guided through the translucent cover that functions as the light guide member, and is emitted at a predetermined position of the translucent cover. The light is emitted from the section to the passenger compartment side.

  In addition, when the translucent cover is formed, the light guide member can be integrated with the translucent cover.

  Moreover, in Claims 2-4, while arrange | positioning the light-projection part of the said light guide member along the circumference | surroundings of the said electrode film, on the back surface side of this light-projection part, it is a dot or reflection step as needed. It is desirable to provide a configured light distribution means.

  In the structure in which the light guide member is integrally formed with the inner lens disposed inside the outer lens constituting the translucent cover as in claim 3, the light guide member (inner lens functioning as an inner lens) is provided. The light emitted from the light emitting portion slightly emits light around the electrode film forming region of the translucent cover that functions as a touch switch, and the light guide member is integrally formed on the translucent cover as in claim 4. With the structure, light is emitted from the light emitting part provided on the translucent cover that functions as a touch switch (translucent cover that functions as a light guide member), so that the area around the electrode film formation area of the translucent cover emits a small amount of light. In any structure, the peripheral edge of the touch switch (translucent cover) can be seen brightly from day to night regardless of the interior of the vehicle, and the lighting operation of the indoor illumination lamp becomes even easier. That is, the position of the touch switch (translucent cover) can be visually recognized more accurately from the inside of the vehicle interior, and the lighting operation of the indoor illumination lamp becomes even easier.

  Note that the intensity of light emission of the translucent cover can be adjusted by, for example, the number or size of dots or reflection steps provided on the back side of the light emitting portion of the light guide member.

In the vehicle interior illumination lamp according to claim 5, a housing fixed to the vehicle interior, a light source for interior illumination disposed inside the housing, and an opening formed on the vehicle interior side of the housing A translucent cover that functions as a touch switch disposed in the unit, and an illumination power source control unit that detects that a part of a human body such as a hand has touched the touch switch and turns the light source on and off. In the vehicle interior lighting with which
A second light source is disposed in the casing, and the light-transmitting cover is configured to be visible by the light of the second light source.

  In addition, as a touch switch, based on the change of the electrostatic capacitance between an electrode and a human body, when a part of human bodies, such as a hand, shown in Claim 1 contact the translucent cover which formed the electrode film | membrane. In addition to the capacitive touch switch in which the illumination power source controller turns on and off the light source for room illumination, a switch having the following structure is also conceivable.

For example, by placing a film on which a transparent electrode film is formed facing the translucent cover surface and pressing the film by hand, the film surface and the translucent cover surface come into contact with each other, and the film surface and the translucent cover surface are transparent. Based on the change of the voltage division ratio due to the resistance between the optical cover surface and the illumination power supply control unit, the resistive film type touch switch for turning on / off the power source of the indoor lighting source,
A piezoelectric element is attached to the corner of a highly rigid translucent cover, and vibration is generated by the piezoelectric element. By touching the translucent cover with a hand or the like, the vibration wave is absorbed by the hand and energy is transmitted. A surface acoustic wave type touch switch in which the illumination power source control unit turns on and off the power source of the indoor illumination light source based on detecting the position that has not been,
Alternatively, the light emitting side and the light receiving side are provided opposite to each other on the side wall around the surface of the translucent cover by using an infrared LED, and the infrared ray is blocked by touching the panel, and the position of the blocking part is detected. Thus, an infrared touch switch in which the illumination power source control unit turns on / off the power source of the indoor illumination light source can be considered.

  (Operation) Since the translucent cover that functions as a touch switch is illuminated by the light of the second light source in the housing, the touch switch (the translucent cover) can be visually recognized from the passenger compartment. Touch to the cover becomes easy.

  According to the vehicle interior illumination lamp according to the present invention, since the translucent cover that functions as a touch switch can be visually recognized from the vehicle interior regardless of day or night, the lighting operation of the interior illumination lamp can be performed smoothly. That is, a vehicular interior lighting with excellent visibility and operability of the touch switch is provided.

  According to the second aspect, since the translucent cover that functions as a touch switch can be surely seen from the vehicle interior regardless of day or night, the lighting operation of the indoor illumination lamp can be performed more smoothly. That is, a vehicular interior illumination lamp that is more excellent in visibility and operability of the touch switch is provided.

  According to the third aspect, since the inner lens disposed between the outer lens and the light source for room illumination suppresses the heat (radiant heat) of the light source from being transmitted to the electrode film, the heat generated by the incandescent bulb or the like. Even if a relatively large amount of bulb is used as a light source for room illumination, thermal deterioration and thermal damage of the electrode film are avoided, and the translucent cover, which is a touch switch, does not become hot.

  Further, since the inner lens functions as a light emitting part of the light guide member, it is possible to accurately emit light in a predetermined region of the outer lens that functions as a touch switch.

  Further, since the light guide member can be integrated with the inner lens simultaneously with the molding of the inner lens, the light guide member can be easily manufactured.

  According to the fourth aspect, since the inner lens is not provided between the electrode film and the light source for room illumination, the lamp structure can be simplified and thinned.

  Moreover, since the translucent cover functions as a light emitting portion of the light guide member, it is possible to accurately emit light in a predetermined region of the translucent cover that functions as a touch switch.

  Moreover, since the light guide member can be integrated with the light transmissive cover simultaneously with the formation of the light transmissive cover, the light guide member can be easily manufactured.

  According to the vehicle interior illumination lamp of the fifth aspect, since the translucent cover that functions as a touch switch can be visually recognized from the vehicle interior regardless of day or night, the lighting operation of the interior illumination lamp can be performed smoothly. That is, a vehicular interior lighting with excellent visibility and operability of the touch switch is provided.

It is a longitudinal cross-sectional view of the interior illumination lamp which is the 1st Example of this invention. It is a longitudinal cross-sectional view of the same room illumination lamp in the light guide member arrangement position. It is a disassembled perspective view of the inner lens which integrally molded the light guide member. It is a figure which shows the electric control circuit used for the same room illumination light. It is a figure which shows the flowchart of the control unit which is an illumination power supply control part. It is a longitudinal cross-sectional view of the interior illumination lamp which is the 2nd Example of this invention. It is a disassembled perspective view of the outer lens which integrally molded the light guide member.

  Hereinafter, embodiments of the present invention will be described based on examples.

  1 to 5 show an interior illumination lamp according to a first embodiment of the present invention, FIG. 1 is a longitudinal sectional view of the interior illumination lamp, and FIG. 2 is a longitudinal sectional view of the interior illumination lamp at a light guide member installation position. 3 is an exploded perspective view of an inner lens integrally formed with a light guide member, FIG. 4 is a diagram showing an electric control circuit used for the indoor illumination lamp, and FIG. 5 is a flowchart of a control unit which is an illumination power source control unit. FIG.

  A room illumination lamp 10 according to the first embodiment includes a flat rectangular casing 12 that is fixed to the ceiling of a rear seat in a vehicle interior and that is long in the vehicle width direction, and an interior illumination that is disposed inside the casing 12. A bulb 14 as a light source, an outer lens 16 as a translucent cover disposed in an opening 13 formed on the casing 12 side of the housing 12, and a back side of the outer lens 16 (a side desired for the bulb 14). The translucent electrode film 18 formed on the surface of the outer lens 16 is connected to the electrode film 18 so that a part of the human body such as a hand contacts the vehicle interior side surface of the outer lens 16, thereby And a control unit 34 that is an illumination power source control unit that turns on and off the power source of the bulb 14 based on a change in capacity.

  That is, the casing 12 and the outer lens 16 define the lamp chamber S of the room lamp 10, and in the lamp chamber S, three valves 14 (14A, 14B, 14C) for indoor lighting are arranged in the vehicle width direction. Is arranged.

  The electrode film 18 has three locations (18A, for example, on the back side of the outer lens 16 with a predetermined interval in the vehicle width direction so as to face a reflector 15 (15A, 15B, 15C) described later by printing, painting, vapor deposition, or sputtering. , 18B, 18C).

  The electrode film 18 (18A, 18B, 18C) is connected to a printed circuit board 30 disposed in the lamp chamber S by conduction means (for example, a lead wire) (not shown), and the printed circuit board 30 is placed at a predetermined position in the lamp chamber S. It is connected to the arranged control unit 34 (see FIG. 4).

  Behind the bulb 14 (14A, 14B, 14C) is a reflector 15 (15A, 15B, 15C) that reflects the light emitted from the bulb 14 forward, but inside the outer lens 16 (on the side of the lamp chamber S). The inner lens 20 is arranged to protect the electrode film 18 from the radiant heat when the bulb 14 is turned on, while hiding the back of the reflector 15 through the outer lens 16 so as not to be seen.

  The inner lens 20 has an inner lens body 21 having a size that can be disposed inside the outer lens 16, and an opening 22 a having a predetermined size corresponding to the reflector 15 that is matched to the size of the inner lens body 21. The inner frame body 21 made of translucent resin and the frame body 22 made of non-translucent resin are integrated by two-color molding.

  The frame body 22 is provided with a leg portion 22b that engages with the step portion 12a1 of the inner flange portion 12a that forms the opening 13 of the housing 12, and the leg portion 22b is placed on the inner flange portion 12a. Thus, the inner lens 20 is positioned in the opening 13 of the housing 12, and the outer lens 16 can be assembled to the opening 13 of the housing 12 so as to cover the inner lens 20.

  The back surface side of the inner lens body 21 that is desired for the opening 22a of the frame body 22 is subjected to graining so that light transmitted through the inner lens body 21 is diffused, and the light-impermeable frame body. 22 has a function of hiding around the reflector 15.

  The inner lens body 21 is integrally provided with a light guide member 24 that emits light in a band-like region (hereinafter referred to as an electrode film non-formation region) 16a (see FIG. 1) sandwiched between the electrode film 18 and the electrode film 18 in the outer lens 16. Is formed.

  The light guide member 24 has a circular cross section and extends into the lamp chamber S in a substantially L shape from a position corresponding to the electrode film non-formation region 16a at the side edge of the outer lens 16, as shown in FIGS. The extending portion 24 </ b> A is provided, and is configured as an integrally molded body with the inner lens body 21. As shown in FIGS. 1 and 2, the inner flange portion 12 a forming the opening 13 of the housing 12 is provided with a slit 12 b for avoiding interference with the extending portion 24 </ b> A of the light guide member 24. Yes.

  That is, the light incident portion side 24A of the light guide member 24 extends from the side edge portion 21b of the inner lens main body 21 into the lamp chamber S, and the inner lens main body 21 forms a part of the light guide member 24 (light emitting portion). Constitute. For this reason, the light incident on the side edge portion 21b of the inner lens body 21 through the light guide member 24 substantially parallel to the inner lens body 21 is guided into the inner lens body 21 functioning as the light guide member. On the contact surface side of the region 21a corresponding to the electrode film non-formation region 16a of the outer lens 16 in the inner lens body 21 with the frame 22 is formed a spot 25 (see FIGS. 2 and 3) as light distribution means. ing.

  Further, behind the reflector 15 in the lamp chamber S, the light emitting diode 32 mounted on the printed circuit board 30 is disposed so as to face the end surface (light incident end) 24a of the extending portion 24A of the light guide member 24. Has been. The light emitted from the light emitting diode 32 that has entered the light guide member 24 from the light incident end portion 24a is guided by repeated total reflection on the inner surface of the light guide member 24, and is guided to the inner lens body 21 from the side edge portion 21b. Light that is incident substantially parallel to the inner lens main body 21, diffuses and is guided through the inner lens main body 21, and is reflected by the dots 25 formed on the contact surface side of the inner lens main body 21 with the frame body 22. The electrode of the outer lens 16 is emitted toward the outer lens 16 from the dot forming region (region 21a corresponding to the electrode film non-forming region 16a) of the inner lens body 21 which is the light emitting portion 24b of the light guide member 24. The non-film-forming region 16a emits light slightly.

  Therefore, the electrode film non-formation region 16a sandwiching the electrode film formation region of the translucent cover 16 functioning as a touch switch, whether day or night, emits light slightly, and the electrodes of the translucent cover 16 functioning as the touch switch. Since the film formation region can be surely seen from the vehicle interior, the lighting operation of the room illumination lamp can be performed smoothly.

  In FIG. 4 which shows the electric control circuit used for the room lamp 10, the electrode films 18 (18A, 18B, 18C) are connected to the control unit 34 via the printed circuit board 30, respectively. There is an electrostatic capacitance (floating capacitance) between the electrode film 18 and surrounding conductors such as a metal portion of the housing 12 and a metal portion of the printed circuit board 30. Since the human body is also a conductor, electrostatic capacity (stray capacitance) exists between the human body and the electrode film 18 (18A, 18B, 18C), and the value of the stray capacitance changes when the human body (finger) approaches the electrode film. To do. The control unit 34 detects the change in the stray capacitance and determines the touch. When it is determined that the touch is detected, the control unit 34 outputs a predetermined output. The output of the control unit 34, which is an illumination power supply control unit, is connected to the gate of a valve driving transistor 36 (36A, 36B, 36C) that drives each valve 14 (14A, 14B, 14C). The anode side of 36 (36A, 36B, 36C) is connected to a power source 38 via a valve 37 (14A, 14B, 14C) and a switch 37 which is interlocked with turning on and off of the ignition switch, and the cathode side is grounded. It is connected to the. The current from the power source 38 to the valve 14 (14A, 14B, 14C) is turned on and off by turning on and off the current to the gate of the valve driving transistor 36 (36A, 36B, 36C) according to the signal from the control unit 34.

  FIG. 5 shows a flowchart of the control unit 34.

  In step 41, it is determined whether or not the touch switch (area corresponding to each of the electrode films 18A, 18B, and 18C of the outer lens 16) is touched. If it is determined at 41 that the touch switch (area corresponding to each of the electrode films 18A, 18B, and 18C of the outer lens 16) is not touched, the process returns to step 41.

  In step 42, it is determined whether or not the valves 14A, 14B, and 14C are turned off (whether current is not supplied to the valves 14A, 14B, and 14C). If it is determined in step 42 that the valves 14A, 14B, and 14C are not lit (current is not supplied to the valves 14A, 14B, and 14C), the process proceeds to step 43, where the valve driving transistors 36A, 36B, After the gate current of 36C is turned on and current is supplied to the valves 14A, 14B, and 14C (the valves 14A, 14B, and 14C are lit), the process returns to step 41. On the other hand, if it is determined in step 42 that the valves 14A, 14B, and 14C are lit (current is supplied to the valves 14A, 14B, and 14C), the process proceeds to step 44 and the valve driving transistors 36A, 36B, and 36C. Is turned off, the supply of current to the valves 14A, 14B, and 14C is stopped (the valves 14A, 14B, and 14C are turned off), and then the process returns to step 41.

  In FIG. 4, the regions corresponding to the electrode films 18A, 18B, and 18C of the outer lens 16 function as independent touch switches, and the bulbs 14 (14A, 14B, and 14C) are lit independently. Although it is configured, depending on the configuration of the control unit 34 corresponding to the electrode films 18A, 18B, 18C, when the human body contacts any one of the areas corresponding to the electrode films 18A, 18B, 18C of the outer lens 16 All the valves 14 (14A, 14B, 14C) may be lit.

  Further, the light emitting diode 32 as the second light source is turned on / off by turning on / off the ignition switch interlocking switch 37 of the automobile, and linked to turning on / off the bulb 14 for room lighting by the control unit 34. It is configured to turn off and on.

  Therefore, not only while the automobile is running, but also in a state where the ignition switch is turned on and the automobile can run, the electrode film non-formation region 16a of the outer lens 16 emits light. The interior lighting lamp 10 can be turned on easily.

  Further, in a state in which the room illumination lamp 10 (bulb 14) is lit and the room is illuminated, the entire outer lens 16 that is a touch switch emits light. Therefore, the light emitting diode 32 is lit and the outer lens that is a touch switch is turned on. Since it is not necessary to cause the lens 16 to emit light, the power consumption to the light emitting diode 32 is stopped by a signal from the control unit 34, thereby eliminating waste of power consumption.

  6 and 7 show an interior illumination lamp according to a second embodiment of the present invention, FIG. 6 is a longitudinal sectional view of the interior illumination lamp, and FIG. 7 is an exploded perspective view of an outer lens integrally formed with a light guide member. is there.

  In the first embodiment described above, the light guide member 24 is integrally formed with the inner lens 20 disposed inside the outer lens 16 that is a light-transmitting cover. A light guide member 24 is integrally formed with an outer lens 116 which is a conductive cover.

  The outer lens 116 matches the size of the outer lens main body 117 and the outer lens main body 117 disposed in the opening 13 formed on the casing 12 side of the casing 12, and has an opening having a predetermined size corresponding to the reflector 15. The frame body 118 formed with the portion 118a is laminated and integrated, and the outer lens body 117 made of translucent resin and the frame body 118 made of translucent resin are integrated by two-color molding. Yes.

  The frame body 118 is provided with a leg portion 118b that engages with the stepped portion 12a1 of the inner flange portion 12a that forms the opening 13 of the housing 12, and the leg portion 118b is placed on the inner flange portion 12a. Thus, the outer lens 116 can be assembled to the opening 13 of the housing 12.

  On the back surface side of the outer lens body 117 corresponding to the opening 118a of the frame body 118, a texture process is performed and a translucent electrode film 18 (18A, 18B, 18C) is formed. The opaque frame 118 has a function of hiding the periphery of the reflector 15.

  The outer lens main body 117 is integrally formed with a light guide member 24 that emits light in a rectangular frame-shaped electrode film non-formation region 117 a surrounding the electrode film 18 formation region in the outer lens main body 117.

  That is, the outer lens body 117 includes an extension portion 24A of the light guide member 24 that extends into the lamp chamber S in a substantially L shape from the side edge portion 117b, and the extension portion 24A is a light of the light guide member 24. The incident lens side is constituted, and the outer lens body 117 constitutes a part of the light guide member 24 (light emitting part). Further, a slit 12b (see FIG. 6) for avoiding interference with the extending portion 24A of the light guide member 24 is provided in the inner flange portion 12a forming the opening portion 13 of the housing 12.

  For this reason, the light that has entered the side edge portion of the outer lens body 117 via the light guide member 24 substantially parallel to the outer lens body 117 is guided through the outer lens body 117 that functions as a light guide member. As shown in FIG. 7, dots 25 as light distribution means are formed on the contact surface side of the outer lens body 117 with the frame body 118 of the rectangular frame-shaped electrode film non-formation region 117a.

  For this reason, the light incident on the outer lens body 117 from the extending portion 24 </ b> A of the light guide member 24 substantially in parallel with the outer lens body 117 is diffused and guided in the outer lens body 117. The light reflected by the dot 25 formed on the contact surface side with the body 118 is emitted toward the vehicle interior from the dot 25 formation region of the outer lens body 117 which is the light emitting portion 24b of the light guide member 24. Thus, the electrode film non-formation region 117a of the outer lens body 117 emits light slightly.

  Further, as a light source for room illumination, a light emitting diode 114 having a relatively small calorific value is disposed in front of the reflector 15 as compared with the bulb 14 employed in the room illumination lamp of the first embodiment.

  For this reason, in the second embodiment, there is no need to consider the influence of the radiant heat of the light emitting diode 114, which is a light source for room illumination, on the electrode film 16, and therefore no inner lens is provided.

  In the interior illumination lamp of the present embodiment, the number of components is reduced and the depth of the lamp (housing 12) can be reduced, so that the lamp structure can be simplified and thinned.

  In the first and second embodiments, the lamps of the inner lens body 21 and the outer lens body 117 functioning as a light guide member as light distribution means for distributing light from the light emitting portion of the light guide member 24. Although the dot 25 provided on the chamber side surface has been described, a reflection step may be used instead of the dot 25.

  Moreover, you may comprise so that the light-projection part of a light guide member may light-emit by a ride guide, a reflective sheet, a light tube, etc.

  In the first and second embodiments described above, a part of the human body such as a hand is brought into contact with the light-transmitting cover on which the electrode film is formed, so that the capacitance changes between the electrode and the human body. The capacitive touch switch in which the illumination power supply control unit (control unit 34) turns on / off the power source of the indoor lighting has been described. However, as the touch switch, in addition to the capacitive type, a resistive film type, surface elasticity A wave system or an infrared system may be used.

  In the resistive touch switch, a film on which a transparent electrode film is formed and a translucent cover surface are arranged to face each other, and the film surface and the translucent cover surface come into contact with each other by pressing the film with a hand or the like. Based on the change in the voltage division ratio due to the resistance between the film surface and the translucent cover surface, the illumination power source controller turns on / off the light source for room illumination.

  The surface acoustic wave type touch switch attaches a piezoelectric element to the corner of a highly transparent translucent cover, generates vibration by the piezoelectric element, and touches the translucent cover with a hand etc. The illumination power supply control unit turns on / off the power supply for the indoor illumination light source based on detecting the position where energy is absorbed and energy is not transmitted.

  The infrared touch switch is provided with the light emitting side and the light receiving side facing each other on the side wall around the surface of the translucent cover by using the infrared LED. Based on this, the illumination power supply controller turns on / off the power supply for the room illumination light source.

DESCRIPTION OF SYMBOLS 12 Housing | casing S Lamp chamber 13 Opening part 14 (14A, 14B, 14C) Bulb 114 which is a light source for room illumination Light-emitting diode 15 (15A, 15B, 15C) which is a main source for room illumination Reflectors 16, 116 Outer lens 16a, 117a, which is a conductive cover, Electrode film non-formation region 18 (18A, 18B, 18C) of outer lens Translucent electrode film 20 Inner lens 21 Inner lens body 22, 118 Frame body 24 Light guide member 24A Light guide Member extending portion 24a Light incident end portion 24b of light guide member Light emitting portion 25 of light guide member Spot 30 which is light distribution means Printed circuit board 32 Light emitting diode 34 which is second light source 34 Control which is illumination power control section unit

Claims (5)

A casing fixed to the passenger compartment, a light source for indoor lighting disposed in the casing, a translucent cover disposed in an opening formed on the casing side of the casing, and the transparent A translucent electrode film formed on the side of the light cover that is desired for the light source, and a part of a human body such as a hand contacting the interior side surface of the translucent cover by being connected to the electrode film In a vehicle interior illumination lamp comprising: an illumination power source controller that turns on and off the power source of the light source based on a change in capacitance between the electrode and the human body,
A vehicle interior illuminating lamp, wherein a second light source is disposed in the housing, and the light-transmitting cover is made visible by the light of the second light source.   Between the second light source and the translucent cover, the light of the second light source incident from the light incident portion is guided by internal reflection and emitted from the light emitting portion to the vehicle interior side. The vehicle interior illumination lamp according to claim 2, further comprising a light guide member that emits light from a predetermined area of the translucent cover that functions as a touch switch.   The vehicle interior lighting according to claim 2, wherein the translucent cover is formed of an outer lens, and the light guide member is integrally formed with an inner lens disposed inside the outer lens. light.   The vehicle interior illumination lamp according to claim 2, wherein the light guide member is integrally formed with the translucent cover. Translucent functioning as a housing fixed to the vehicle compartment, a light source for indoor lighting arranged inside the housing, and a touch switch arranged in an opening formed on the vehicle compartment side of the housing A vehicle interior illumination lamp comprising: a cover; and an illumination power supply control unit that detects that a part of a human body such as a hand has contacted the touch switch and turns on and off the light source,
A vehicle interior illuminating lamp, wherein a second light source is disposed in the housing, and the light-transmitting cover is made visible by the light of the second light source.

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