JP2012040970A - Vehicular indoor light - Google Patents

Abstract

Even when noise is generated from a translucent conductive film, it is possible to prevent other electronic components and the like from being affected by the noise by absorbing the noise at a shield portion, and noise from the outside can be prevented. It can be prevented from being picked up by the light-transmitting conductive film.
A lamp body 100 fixed to a vehicle interior, a light source provided in the lamp body 100, and a light transmitting portion 210 that transmits light emitted from the light source toward the vehicle interior. And a translucent cover 200 having a translucent conductive film formed on at least a part of the translucent part 210, and a contact body connected to the translucent conductive film on the surface of the translucent part 210 on the vehicle interior side. A lighting state control unit 400 that controls a lighting state of the light source by detecting a change in capacitance formed between the transparent conductive film and the contact body due to contact; and the transparent conductive film , And a shield portion that is grounded to the ground.
[Selection] Figure 1

Description

  The present invention relates to a vehicle interior lamp. More specifically, light is emitted from a light source provided in a lamp body fixed to an overhead console or the like on the ceiling of the passenger compartment to the passenger compartment, and a finger is applied to the surface of the translucent cover that covers the light source. It is related with the interior lamp for vehicles which can operate on or off of a light source by making it contact.

  An interior lamp for illuminating the interior of the vehicle is provided on the ceiling surface of the interior of the automobile. In a conventional room light, operations such as turning on and off are performed by operating a changeover switch such as a push switch provided in the vicinity of the irradiation surface. However, in such a room light, there is a problem that a change-over switch must be searched for in a dark vehicle interior when a lighting operation is performed from a light-off state.

  In view of this, a vehicle interior lighting device has been proposed in which a touch sensor is provided on a part of the light-transmitting surface of the light-transmitting cover, and can be switched on and off by simply touching the light-transmitting surface with a finger (for example, a patent). Reference 1). Such a touch sensor type indoor light is applied to an electrode when a human body capacitance is applied to the conductive film by touching a transparent cover or the like on which a conductive film functioning as an electrode of the touch sensor is formed with a finger. The frequency of the pulse voltage changes, and the presence or absence of a touch operation is detected by detecting this.

JP 2007-230450 A

  However, in the touch sensor type indoor lamp as described above, noise derived from the pulse voltage applied to the electrode of the touch sensor may radiate to the surroundings, which may adversely affect other in-vehicle electrical components. was there.

  In order to solve the above-described problems, the present invention provides a lamp body fixed to a passenger compartment, a light source provided in the lamp body, and a light source disposed in the vehicle body so as to cover the light source. A translucent cover having a translucent portion that transmits light emitted toward the light transmitting portion, a translucent conductive film formed on at least a part of the translucent portion, and a contact with the translucent conductive film The lighting state of the light source is controlled by detecting a change in capacitance formed between the translucent conductive film and the contact body when the body contacts the surface of the translucent part on the passenger compartment side There is provided a vehicular interior lamp comprising: a lighting state control unit that performs the above operation; and a shield unit that is provided around the translucent conductive film and is grounded to the ground.

  According to such a vehicle interior light, operations such as lighting and light amount adjustment can be performed simply by touching a portion (touch operation surface) where the transparent conductive film is formed on the back side of the transparent cover with a finger. As compared with the case where the push button or the adjustment knob is operated, the operability particularly in the dark interior is improved. Further, even when noise is generated from the translucent conductive film, it is possible to prevent other electronic components inside and outside the lamp from being affected by the noise by absorbing the noise at the shield portion. In addition, it is possible to prevent external noise from being picked up by the light-transmitting conductive film.

  In the vehicle interior light, the lighting state control unit is provided in the vicinity of the translucent cover, and the shield unit is electrically connected to a ground terminal of a ground potential provided in the lighting state control unit. It is preferable that

  Thereby, the noise which generate | occur | produced from the translucent conductive film can be more effectively removed by the shield part. Further, for example, the potential of the shield portion can be stabilized near the ground potential as compared with the case where the shield portion is grounded by body earth.

  In the above vehicle interior light, it is preferable that the shield portion is provided in an annular shape so as to surround the translucent conductive film.

  Thereby, the noise from a translucent conductive film and the noise from the outside can be removed more effectively.

  Moreover, the said vehicle interior lamp WHEREIN: It is preferable that the said shield part is formed in the said translucent cover with the same translucent conductive material as the said translucent conductive film.

  Thereby, since a shield part and a translucent conductive film can be formed together with a translucent cover using the same formation method, a shield part can be easily formed around a translucent conductive film.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

The front view of the vehicle interior lamp 10 which concerns on embodiment of this invention is shown. The AA cross-sectional arrow view of the vehicle interior lamp 10 shown in FIG. 1 is shown. The BB cross-sectional arrow view of the vehicle interior lamp 10 shown in FIG. 1 is shown. The rear view of the translucent cover 200 is shown.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the following embodiments do not limit the invention according to the scope of claims, and all combinations of features in the embodiments are solutions of the invention. It is not always essential to the means.

  FIG. 1 shows a front view of a vehicle interior lamp 10 according to an embodiment of the present invention. 2 shows an AA cross-sectional view of the vehicle interior light 10 shown in FIG. 1, and FIG. 3 shows a BB cross-sectional view of the vehicle interior light 10 shown in FIG. . FIG. 4 shows a rear view of the translucent cover 200.

  The vehicle interior light 10 according to the present embodiment is used, for example, to illuminate the interior of a vehicle by being attached to the ceiling surface of the interior of an automobile, and includes a lamp body 100, a translucent cover 200, light sources 311, 312, 313, a lighting state control unit 400, an inner lens 500, and the like. In this example, the vehicle interior light 10 is arranged in a space between the vehicle body 1100 and the overhead console 1000 and illuminates the interior of the vehicle through the opening 1010.

  In this specification, “vehicle compartment side” means, for example, above the translucent cover 200 in FIGS. 2 and 3. Further, the “light chamber side” means a direction opposite to the vehicle interior with respect to the translucent cover 200 (below the translucent cover 200 in FIGS. 2 and 3). Further, “side” means a direction along the vehicle body 1100 and the overhead console 1000 in the vehicle interior lamp 10.

  The lamp body 100 is a member that is integrally molded of resin, for example, and is provided with recesses 110 and 111 that are open on the vehicle compartment side. The light sources 311, 312, and 313 are fixed inside the recess 110, and the lighting state control unit 400 is fixed inside the recess 111. In addition, a plurality of fixed seats 130 with screw holes are provided on the outer periphery of the lamp body 100, and the lamp body 100 is screwed to the overhead console 1000 via the fixed seat 130. Fixed to the passenger compartment.

  The translucent cover 200 is formed of, for example, a transparent or translucent resin and transmits light emitted from the light sources 311, 312, and 313 toward the vehicle interior, and a peripheral portion of the translucent section 210. The peripheral wall 220 extends substantially perpendicularly to the inner and outer surfaces (translucent surface) of the translucent part 210. Further, the peripheral wall 220 is provided with a plurality of fixing seats 230 in which screw holes are formed, engaging holes 240 and engaging claws 241, and the translucent cover 200 includes the fixing seats 230 and the engaging claws 241. It is fixed to the lamp body 100 by being screwed or engaged with a screw hole or an engaging claw of the lamp body 100 through the hole 240 and the engaging claw 241.

  As shown in FIGS. 1 to 3, the translucent cover 200 is disposed so as to cover an opening on the vehicle compartment side in the concave portion 110 of the lamp body 100, and the lamp chamber is formed by the concave portion 110 of the lamp body 100 and the translucent cover 200. Is formed. In addition, the translucent part 210 of the translucent cover 200 is disposed at a position that covers the light sources 311, 312, and 313 when the vehicle interior lamp 10 is viewed from the passenger compartment side.

  In addition, two independent thin film electrodes of a light-transmitting conductive film 251 and a light-transmitting conductive film 252 are formed on the surface (inner surface) on the lamp chamber side of the light-transmitting portion 210 of the light-transmitting cover 200. In this example, for example, as shown in FIG. 4, the translucent conductive film 251 is formed at the center of the inner surface of the translucent part 210, and the translucent conductive film 252 is a peripheral part of the inner surface of the translucent part 210. Are formed so as to surround the transparent conductive film 251. Each of the translucent conductive film 251 and the translucent conductive film 252 may be an ITO (Indium Tin Oxide) film formed by sputtering, for example.

  In addition, the conductive wires 264, 265 provided with connectors 267, 268, 269 at one ends are provided in the portions where the transparent conductive film 251 and the transparent conductive film 252 are formed in the transparent portion 210 of the transparent cover 200, respectively. , 266 to which the other ends of the terminals 261, 262, 263 are fixed. Specifically, as shown in FIG. 4, a terminal 261 is attached to a portion of the translucent part 210 where the translucent conductive film 251 is formed, and the terminal 261 is provided with a connector 267 at the tip. A conductor 264 is attached.

  In addition, terminals 262 and 263 are attached to the portion of the light transmitting portion 210 where the light transmitting conductive film 252 is formed, and the terminals 262 and 263 are conductors 265 and 266 provided with connectors 268 and 269 at their tips. Is attached. The translucent conductive film 251 is electrically connected to the connector 267 via the terminal 261 and the conductive wire 264, and the translucent conductive film 252 is connected to the connector 268, via the terminals 262 and 263 and the conductive wires 265 and 266. H.269.

  These terminals 261, 262, and 263 are provided at positions hidden by the overhead console 1000 when the vehicle interior light 10 is viewed from the compartment side, for example, as shown in FIG. The appearance of 10 is not impaired.

  As shown in FIG. 2, the light sources 311, 312, and 313 are respectively arranged at different positions in the lamp chamber. More specifically, as shown in FIGS. 2 and 3, the light source 312 is arranged in the approximate center of the lamp chamber and is held by the light source holding unit 270. The light source 311 and the light source 313 are arranged on both sides of the light source 312. In this example, bulbs such as halogen bulbs are used as the light sources 311, 312, and 313, but the type of the light source is not limited to this.

  Reflective members 151, 152, and 153 that reflect light from the light sources 311, 312, and 313 toward the passenger compartment are provided on the side opposite to the light-transmitting cover 200 with respect to the light sources 311, 312, and 313. In addition, a lens step is provided on the inner surface of the light transmitting portion 210 of the light transmitting cover 200 so that the light from the light sources 311, 312, and 313 is diffused as shown in FIG. 2, for example. Is provided. The formation position of the lens step, the shape of the step, and the like are set as desired for the purpose of, for example, making the light distribution pattern by the vehicle interior lamp 10 appear more beautiful.

  The lighting state control unit 400 includes a circuit board 410, a control circuit unit 420, connector housing units 431, 432, 433, and ground terminals 435, 436. The circuit board 410 is a printed wiring board on which a predetermined circuit pattern is formed, for example, and is held in the recess 110 by a plurality of lances 140 provided inside the recess 111 in the lamp body 100.

  The control circuit part 420, the connector housing parts 431, 432, 433 and the ground terminals 435, 436 are fixed to the circuit board 410. Among these, the connector housing portion 431 is electrically connected to the control circuit portion 420, and the connector housing portions 432 and 433 are electrically connected to the ground terminals 435 and 436, respectively. In these connector accommodating portions 431, 432, and 433, connectors 267, 268, and 269 provided at the tips of the conducting wires 264, 265, 266 extending from the terminals 261, 262, 263 attached to the translucent cover 200 are provided. It is inserted.

  Therefore, the light-transmitting conductive film 251 in the light-transmitting portion 210 of the light-transmitting cover 200 is electrically connected to the control circuit portion 420, and the light-transmitting conductive film 252 is electrically connected to the ground terminals 435 and 436.

  The ground terminals 435 and 436 that are electrically connected to the translucent conductive film 252 are grounded by being electrically connected to, for example, the ground pattern of the circuit board 410 and are kept at the ground potential. Accordingly, the translucent conductive film 252 provided around the translucent conductive film 251 in the translucent part 210 of the translucent cover 200 is applied to the translucent conductive film 251 by applying the pulse voltage. It functions as an electromagnetic shield (shield part) that absorbs electromagnetic noise generated from the.

  Therefore, even when noise is generated from the translucent conductive film 251, other electronic components inside and outside the vehicle interior lamp 10 are affected by the noise by absorbing the noise with the translucent conductive film 252. Can be prevented. In addition, external noise such as electromagnetic noise generated from other various in-vehicle devices can be prevented from being picked up by the transparent conductive film 251. In this example, the transparent conductive film 252 that functions as a shield portion is formed using the same material and the same method as the transparent conductive film 251 that functions as an electrode for various touch operations described later. No special equipment or process is required to form the film. The shield part provided around the translucent conductive film 251 is not limited to the translucent conductive film as in this example, and a conductor may be wound around the peripheral wall part 220 or the like, for example.

  In this example, as described above, the transparent conductive film 252 is grounded by the ground terminals 435 and 436 provided on the circuit board 410 of the lighting state control unit 400. Therefore, since the ground terminals 435 and 436 for grounding the transparent conductive film 252 are provided in the vicinity of the control circuit unit 420 that applies a pulse voltage to the transparent conductive film 251, the ground terminals 435 and 436 are generated from the transparent conductive film 251. Noise can be removed more effectively, and the potential of the light-transmitting conductive film 252 can be stabilized near the ground potential as compared with the case where the light-transmitting conductive film 252 is connected to the vehicle body 1100 and grounded by body earth, for example. Can do.

  Further, in this example, since the transparent conductive film 252 is provided so as to surround the entire transparent conductive film 251 instead of a part thereof, noise from the transparent conductive film 251 and external noise are more reliably detected. Can be blocked.

  The control circuit unit 420 applies a pulse voltage having a predetermined frequency to the translucent conductive film 251. When a contact body such as a human finger comes into contact with the outer surface (surface on the passenger compartment side) of the translucent portion 210, the above-described effect is caused by the electrostatic capacitance formed between the translucent conductive film 251 and the contact body. The frequency of the pulse voltage changes. By detecting this change, the control circuit unit 420 determines the contact frequency and contact time of the contact body, and controls the lighting state of the light sources 311, 312, and 313 according to a preset control program.

  For example, the control circuit unit 420 includes a light source driving circuit (not shown) at a predetermined stage each time a finger touches a portion (touch operation surface) where the transparent conductive film 251 is formed inside the outer surface of the transparent unit 210. You may control the magnitude | size of the electric current supplied with respect to the light sources 311,312,313. More specifically, the control circuit unit 420 determines the magnitude of the current that the light source driving circuit supplies to the light sources 311, 312, and 313 when the light sources 311, 312, and 313 are lit brightest. When 100 is set, for example, every time a finger touches the part, the magnitude of the current is set to 0 (non-lighting), 20, 40, 60, 80, 100 (lighting at the maximum light amount) in five steps sequentially. You may control the said light source drive circuit so that it may become large.

  In this case, the control circuit is configured such that when the light sources 311, 312, and 313 are lit brightest (the current supplied from the light source driving circuit to the light sources 311, 312, and 313 is the largest ( In the case of 100), when it is detected that a finger touches the part, the light source 311, 312, 313 may be turned off by stopping the supply of current to the light source 311 by the light source driving circuit.

  Alternatively, the control circuit unit 420 may be provided with a timer circuit that counts the time that the finger is continuously touching the touch operation surface. In this case, the control circuit unit 420 determines the magnitude of the current that the light source driving circuit supplies to the light sources 311, 312, and 313 according to the length of time that the finger is continuously touching the touch operation surface. May be adjusted. Alternatively, the control circuit unit 420 may adjust the light amount by turning off or turning on one of the light sources 311, 312, and 313 each time the finger touches the part.

  The inner lens 500 is formed of, for example, a translucent resin, and is disposed immediately inside the translucent cover 200 (close to the translucent cover 200 in the lamp chamber formed by the concave portion 110 of the lamp body 100 and the translucent cover 200). Is done. In this example, as shown in FIGS. 2 and 3, since the inner lens 500 is provided on the entire back side of the translucent part 210, even when the translucent cover 200 is formed of a transparent material, When the vehicle interior lamp 10 is viewed, various members in the lamp chamber cannot be seen. Thereby, there are few restrictions in the shape and arrangement | positioning, etc. of the light sources 311, 312, 313 and the reflecting members 151, 152, 153 in the lamp chamber, and the design is excellent.

  The inner lens 500 also plays a role of making it difficult for heat generated when the light sources 311, 312, and 313 are turned on to be transmitted to the translucent cover 200. As a result, the touch operation surface of the translucent part 210 of the translucent cover 200 is not easily heated, and there is no risk of burns when touched with a finger. The inner lens 500 may be two-color molded. More specifically, for example, by molding a portion that emits light from the light sources 311, 312, and 313 with a transparent resin, and forming other portions with a non-transparent (colored) resin, The appearance from is improved.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment.

DESCRIPTION OF SYMBOLS 10 ... Vehicle interior light 100 ... Lamp body 110, 111 ... Recess 130 ... Fixed seat 140 ... Lance 151, 152, 153 ... Reflective member 200 ... Translucent cover 210 ... Translucent part 220 ... Peripheral wall part 230 ... Fixed seat 240 ... Engagement holes 241 ... engaging claws 251, 252, 253 ... translucent conductive films 261, 262, 263 ... terminals 264, 265, 266 ... conductive wires 267, 268, 269 ... connectors 270 ... Light source 400 ... Lighting state control unit 410 ... Circuit board 420 ... Control circuit units 431, 432, 433 ... Connector housings 435,436 ... Ground terminal 500 ... Inner lens 1000 ... Overhead console 1010 ... Opening portion 1100 ... Car body

Claims (4)

A lamp body fixed in the passenger compartment,
A light source provided in the lamp body;
A light-transmitting portion disposed so as to cover the light source and transmitting light emitted from the light source toward the vehicle interior; and a light-transmitting conductive film is formed on at least a part of the light-transmitting portion A translucent cover;
A change in capacitance formed between the translucent conductive film and the contact body is detected when the contact body is connected to the translucent conductive film and the contact body contacts the surface of the translucent portion on the vehicle interior side. A lighting state control unit for controlling the lighting state of the light source by
A shield portion provided around the translucent conductive film and grounded to the ground;
A vehicle interior light comprising: The lighting state control unit is provided in the vicinity of the translucent cover,
The vehicle interior light according to claim 1, wherein the shield part is electrically connected to a ground terminal having a ground potential provided in the lighting state control part.   The vehicular interior light according to claim 1 or 2, wherein the shield part is provided in an annular shape so as to surround the translucent conductive film.   The vehicle interior light according to any one of claims 1 to 3, wherein the shield portion is formed on the translucent cover by the same translucent conductive material as the translucent conductive film. .

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