JP2008143213A - Vehicle interior lighting device - Google Patents

Abstract

A bus bar, a contact, and a switch knob constituting a switch are made to function as a switch of a light source unit in association with the assembly of a functional unit to a design unit, thereby improving work efficiency and reducing costs.
A light source part 11 of a functional part 10 connected to a flexible flat cable 2 is inserted into a light source holding part 22 of the design part 20 in association with the assembly of the functional part 10 to the design part 20 and a lens. It is held on the inner surface side of the portion 21. In addition, the bus bar portion 12 of the functional portion 10 connected to the flexible flat cable 2 is fitted into the contact holding portion 23 of the design portion 20 and held on the inner surface side of the lens portion 21. At this time, the bus bar portion 12 fitted in the contact holding portion 23, the contact 25 and the switch knob 26 incorporated in advance in the contact holding portion 23 are in a state of functioning as a switch of the light source portion 11.
[Selection] Figure 1

Description

  The present invention relates to a vehicular interior lighting device mounted in a vehicle interior, and more particularly to a structure for improving work efficiency and cost, and improving appearance.

  Conventionally, vehicle interior lighting devices are known (see, for example, Patent Documents 1, 2, 3, and 4).

  FIG. 14 is an exploded perspective view showing the automobile room lamp apparatus disclosed in Patent Document 1. As shown in FIG.

  Referring to FIG. 14, in the automotive room lamp apparatus 100, a rectangular opening 102 is formed on the upper surface of the slider 101, and a protrusion 103 is provided on the bottom surface of the slider 101.

  A blade receiving portion 104 a of the S movable terminal 104 is fitted into the rectangular opening 102 of the slider 101 and protrudes upward. The blade receiving portion 104 a slides on a slide base 106 formed on the P common terminal 105. Connect freely. Further, the protrusion 103 of the slider 101 passes through the slide groove 108 of the switch box 107, and the tip portion is integrally connected to the switch knob 109.

  A lid 110 is detachably fitted to the switch box 107. A valve holder 111 is formed to protrude from the center of the tip of the lid 110. In addition, a fitting groove (not shown) is formed in the inner wall surface of the side plate of the lid 110, and the fitting groove is electrically connected to the neck portion 113 and the room lamp 112 of the room lamp 112. A pair of valve terminals 114 are fitted.

  In the room lamp 112, a lead wire 115 that is electrically connected to the filament is led out at a neck portion 113 formed in an elliptical shape.

  The bulb terminal 114 is made of a conductive metal plate having a spring property, and electrically connects the first flat conductor 117 and the third flat conductor 118 of the flexible flat cable (FFC) 116 and the room lamp 112. The bulb terminal 114 is formed by bending a conductor connection portion 119 electrically connected to the FFC 116 and a bulb connection portion 120 electrically connected to the lead wire 115 of the room lamp 112 into a substantially Z shape. It is formed.

  The FFC 116 is formed by covering a first flat conductor 117, a second flat conductor 121, and a third flat conductor 118, which are thin conductors, with an insulating film.

  FIG. 15 is an exploded perspective view showing the vehicle interior illumination lamp disclosed in Patent Document 2. As shown in FIG.

  Referring to FIG. 15, the vehicle interior illumination lamp 130 includes a functional part 131 and a design part 132 that is assembled to the functional part 131.

  The functional unit 131 is attached to the ceiling plate 133 from the vehicle body panel side in a state where a part is exposed to the indoor side from the opening 133a of the ceiling plate 133 that is an interior material that covers the vehicle body panel. Moreover, the design part 132 is attached to the ceiling board 133 from the indoor side so that the opening part 133a may be covered.

  That is, the functional unit 131 includes a bulb 134 that is a light source, and a switch unit 135 that switches power to the bulb 134 on and off. An electric wire 136 such as an FFC (flexible flat cable) is connected to the electric wire connection portion of the switch circuit of the switch unit 135. Further, the switch unit 135 is provided with a switch lever 137 for turning on and off the power to the valve 134.

  The design portion 132 is formed in a lens shape that transmits light and includes a housing 138. The housing 138 is attached to the ceiling board 133 so as to cover the opening 133a from the indoor side by engaging the locking protrusion 139 with an engagement hole 133b provided at the peripheral edge of the opening 133a.

  A switch knob 140 is provided on the housing 138 of the design portion 132. The switch knob 140 has a pair of locking claws engaged with the peripheral edge of the slide groove 141 of the housing 138 on the vehicle body panel side, and is held so as to be slidable in the longitudinal direction of the slide groove 141.

  Further, a pair of restricting protrusions 142 are provided in the vicinity of the slide groove 141 in the housing 138. The restricting protrusion 142 holds the switch unit 135 in the slide movement direction of the slide knob 140 and restricts the relative displacement of the switch unit 135 (functional unit 131) with respect to the housing 138 along the slide movement direction of the slide knob 140. .

  In such a vehicular interior lamp 130, the switch knob 140 of the design part 132 is switched by the engaging part 143 in the state in which the functional part 131 and the design part 132 are assembled via the ceiling plate 133. Engage with the lever 137. In this state, when the switch knob 140 is pressed in the sliding movement direction, the switch lever 137 is interlocked, and the power to the valve 134 is turned on and off.

  FIG. 16 is an exploded perspective view showing the lighting device disclosed in Patent Document 3. As shown in FIG.

  Referring to FIG. 16, in the illumination device 150, a bulb 152 is mounted in a storage space inside the lens body 151, and is held by the lens body 151 by the holding unit 153. An electric circuit 154 that supplies electricity to the valve 152 is formed integrally with the lens body 151 on the back surface of the lens body 151. Further, a switch 155 is assembled to the lens body 151 with a screw 156.

  The holding portion 153 that holds the bulb 152 is formed integrally with the lens body 151 at an inner end portion of a rib 157 that extends in a beam shape substantially at the center of the lens body 151. The holding unit 153 holds the bulb 152 on the lens body 151 by holding the cap portions 152a at both ends of the bulb 152.

  Further, a contact ball 159 and a spring 158 that biases the contact ball 159 are provided inside the switch 155. The switch 155 functions as a switch of the electric circuit 154 by moving the contact ball 159 by swinging with the screw 156 as a fulcrum.

  FIG. 17 is a cross-sectional view showing an indoor lamp disclosed in Patent Document 4. As shown in FIG.

  Referring to FIG. 17, in the indoor lighting lamp 160, a lens 164 of the design portion 163 is attached to an opening 162 provided in the ceiling trim 161 of the vehicle, and a light source bulb 166 is provided above the lens 164. It is done.

  The lens 164 includes a lens body 167 formed in a substantially rectangular shape, a locking edge 168 provided on the periphery of the lens body 167, and a transparent bezel 169 attached to the locking edge 168.

  The transparent bezel 169 includes a fitting portion 170 fitted to the locking edge 168 of the lens main body 167 and a protruding portion 171 protruding outward from the fitting portion 170. A light shielding layer 172 is provided on the back surface 169 a of the transparent bezel 169. The light shielding layer 172 is formed by printing, vapor deposition, film in-mold, or painting.

Japanese Patent Laid-Open No. 2002-373549 (pages 2 and 3, FIG. 1) Japanese Patent Laid-Open No. 2006-21670 (pages 2 and 3, FIG. 7) Japanese Patent Laying-Open No. 2003-220887 (pages 3 to 5, FIG. 1) Japanese Patent Laid-Open No. 2006-21657 (pages 3 to 4, FIG. 1)

  Among the above-described conventional vehicle interior lighting devices, in the vehicle room lamp apparatus 100 shown in FIG. 14 described in Patent Document 1 and the vehicle interior lamp 130 shown in FIG. 15 described in Patent Document 2, The functional units such as the room lamp 112 (Patent Document 1), the bulb 134 (Patent Document 2), the switch unit 135 (Patent Document 2), etc. are integrated, and assembled to the design part side and accommodated in the interior panel of the vehicle. Is done.

  In the vehicular interior lighting devices such as the automotive room lamp apparatus 100 and the vehicular interior illumination lamp 130, only the slider is disposed in the switch operating portion on the design portion side, and the bus bar of the switch unit is connected to the functional portion side. Placed in.

  Therefore, when assembling the functional part to the design part, it is necessary to position the slider with respect to the bus bar of the switch unit arranged on the functional part side. That is, for example, in the vehicle interior illumination lamp 130 described in Patent Document 2, it is necessary to position the switch knob 140 of the design portion 132 with respect to the switch lever 137 of the switch unit 135. For this reason, there was a problem that the working time was increased and the cost was increased.

  In addition, in the illumination device 150 shown in FIG. 16 described in Patent Document 3, the bulb 152 is accommodated in the lens body 151 which is a design part, and the switch 155 is assembled, and the lens body 151 is attached to the vehicle panel. The assembly work can be completed simply by assembling the to the vehicle panel. Therefore, the working time can be shortened and the cost can be reduced.

  However, in order to route the bulb 152 in the center of the lens body 151, it is necessary to provide a beam-like rib 157 that supports the conductor integrally with the lens body 151 and provided inside the lens body 151.

  For this reason, the material of the lens body 151 is clouded, the outer surface of the lens body 151 is rubbed and fogged like a glass, or the inner rib 157 is visible from the outside by providing irregularities in the shape of a prism cut so that the surface of the lens body 151 is scattered. Even if not, since the beam-like ribs 157 are thick, the ribs 157 are reflected when the light from the bulb 152 is transmitted, and there is a problem that the appearance from the passenger compartment side is deteriorated.

  Furthermore, in the room illumination lamp 160 shown in FIG. 17 described in Patent Document 4, the light shielding layer 172 is provided on the periphery of the lens main body 167 of the lens portion 164, and the light source bulb 166 and the light source bulb 166 are attached thereto. The light shielding range is not defined for the function unit 172. For this reason, there is a lot of room for improvement in the appearance from the indoor side.

  The present invention makes it possible to attach a plurality of functional parts to the design part without impairing the appearance when the bulb is lit, and to simplify and miniaturize the switch structure without impairing the work of attaching the functional part of the light source switch. It aims at providing the interior lighting device for vehicles.

  The above object of the present invention is achieved by the following configurations.

(1) A vehicle interior lighting device having a functional part and a design part,
In the function part,
A plurality of light source parts each connected to the electric wire at a predetermined interval and fitted with a bulb;
It is connected to the electric wire, has an insulating portion formed between a plurality of bus bars and each bus bar, and a bus bar portion constituting a switch is provided,
In the design part,
A lens unit that allows bulb light from the light source unit to pass through;
Light source holding that is provided on the inner surface side of the lens unit and holds each light source unit in the lens unit by inserting and inserting each light source unit connected to the electric wire when the functional unit is assembled to the design unit And
Provided on the inner surface side of the lens part, the contact and switch knob constituting the switch together with the bus bar part are incorporated, and the bus bar part connected to the electric wire is inserted when the functional part is assembled to the design part. A contact holding part that holds the bus bar part on the lens part,
A light-shielding housing that is mounted on the inner surface side of the lens portion and covers at least a portion surrounded by the light source holding portion and the contact holding portion;
With the assembly of the functional part to the design part, the vehicle interior lighting device is characterized in that the bus bar part, the contact and the switch knob constituting the switch function as a switch of the light source part.

(2) The contact constituting the switch has flexibility, is provided with an indent, and is inclined along the fitting direction of the bus bar portion to the contact holding portion of the design portion,
The vehicle interior lighting device according to (1), wherein the indentation of the contact is slid on the surface of the bus bar of the bus bar portion in association with the assembly of the functional portion to the design portion.

  (3) The vehicle interior lighting device according to (2), wherein the contact includes a plurality of spring pieces that can be elastically deformed independently of each other.

  (4) A concave portion or a convex portion is formed on each of the slide portions of the bus bar and the insulating portion so that the contact connection position is maintained on either the bus bar or the insulating portion of the bus bar portion. The vehicle interior lighting device according to (2) or (3).

  (5) The insulating part of the bus bar is provided with guide means for guiding the indent of the contact to a predetermined position of the bus bar when the contact holding part is inserted. 4) The vehicle interior lighting device according to any one of 4).

  (6) The vehicle according to any one of (1) to (5), wherein a light shielding layer is formed in a portion corresponding to the light source holding part and the contact holding part on the outer surface side of the lens part. Interior lighting device.

  (7) The vehicular interior lighting device according to any one of (1) to (6), wherein a semi-transmissive layer is formed on the entire outer surface side of the lens portion.

  In the vehicle interior lighting device according to (1), the light source part of the functional part connected to the electric wire is inserted into the light source holding part of the design part with the assembly of the functional part to the design part. At the same time, the bus bar portion of the functional portion connected to the electric wire is inserted into the contact holding portion of the design portion. Thereby, a light source part and a bus-bar part are each hold | maintained on the inner surface side of a lens part via a light source holding part and a contact holding part in the state connected to the electric wire. At this time, the bus bar portion, the contact, and the switch knob constituting the switch are in a state of functioning as a switch of the light source portion.

  In the vehicle interior lighting device according to (2), the indent of the flexible contact is brought into contact with the bus bar while sliding on the surface of the bus bar as the functional unit is assembled to the design portion. . Thereby, the oxide film on the surface of the bus bar is scraped off, and a reliable electrical connection can be obtained from the beginning. Therefore, a favorable conduction state of the contact and the bus bar is ensured.

  In the vehicle interior lighting device according to (3), each spring piece of the contact individually contacts the bus bar with a predetermined contact pressure. Therefore, the contact pressure between each spring piece and the bus bar can be adjusted individually or constantly.

  In the vehicle interior lighting device according to the above (4), the indentation of the contact is guided to the concave or convex portion of the bus bar or the insulating portion as the functional portion is assembled to the design portion, and is brought into contact with the bus bar. The Thereby, the favorable conduction | electrical_connection state of a contact and a bus-bar is ensured.

  Further, the creepage distance between the bus bars is increased, and even when a high voltage is applied to the bus bar portion, high insulation between the bus bars is ensured.

  Further, when a convex portion is formed on the insulating portion of the bus bar portion, when the indent of the contact is guided to the corresponding bus bar of the bus bar portion, the convex portion is engaged with the convex portion of the insulating portion of the bus bar portion. Since it gets over the part, a sense of moderation is given to the switch operation without requiring a complicated mechanism.

  In addition, when a concave portion is formed in the bus bar of the bus bar portion, when the contact is slid in association with the assembly of the functional portion to the design portion, the indent is caused by the concave portion of the bus bar so that the corresponding bus bar portion of the bus bar portion Are held in place and contacted. Thereby, the favorable conduction state of a contact and a bus-bar and the feeling of moderation of switch operation are ensured.

  In addition, when a convex part is formed in the insulating part of the bus bar part, and the concave part is formed alternately with the convex part in the bus bar of the bus bar part, the functional part is assembled to the design part. Accordingly, each of the convex portions induces the indentation of the contact to contact the corresponding bus bar of the bus bar portion. In addition, each of the concave portions continuing to the convex portion guides the indent of the contact to a predetermined position on the corresponding bus bar of the bus bar portion. As a result, the indent of the contact is guided and contacted to the bus bar more smoothly and reliably.

  In the vehicle interior lighting device according to the above (5), when the functional part is assembled to the design part, the indentation of the contact is predetermined by the guide means with the insertion of the bus bar part into the contact holding part of the design part. It will be guided to the position of and will be in a contact state reliably with a bus-bar. This makes it possible to set the initial position of the switch by simply inserting and inserting the bus bar portion into the contact holding portion of the design portion, and does not require alignment of the contact, the switch knob, and the bus bar portion, thereby reducing assembly work.

  In the vehicle interior lighting device according to (6), the light-shielding layer makes the light source holding part and the contact holding part invisible from the occupant side, and the appearance from the occupant side is improved.

  In the vehicle interior lighting device according to (7), the semi-transmissive layer is a decorative coating layer made of vapor deposition or film-in-mold. The semi-transmissive layer makes it difficult to see the light source holding part and the contact holding part from the occupant side when the bulb is not lit, and improves the appearance from the occupant side. Further, the light shielding effect by the light shielding housing prevents the light source holding part and the contact holding part from being reflected on the lens by the bulb light from the light source part at the time of lighting, so that a decrease in appearance is suppressed.

  According to the vehicle interior lighting device of the present invention, with the assembly of the functional part to the design part, the bus bar part, the contact, and the switch knob constituting the switch can be provided with the lens part without impairing the appearance when the bulb is turned on. By being arranged inside and functioning as a switch of the light source unit, the assembly of the functional unit can be improved, the number of components can be reduced, and the size can be reduced.

  The vehicle interior lighting device obtained by the present invention is provided in interior materials such as a ceiling surface of a vehicle and a sun visor, and is suitably used when good workability and appearance are required.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
1 is an exploded perspective view showing a vehicular interior lighting device according to a first embodiment of the present invention, and FIG. 2 is a perspective view of a main part of the vehicular interior lighting device of FIG. 3 is a perspective view showing the upside down state of the switch case of the vehicle interior lighting device of FIG. 1, FIG. 4 is a perspective view showing contacts of the vehicle interior lighting device of FIG. 1, and FIG. 1 is a perspective view showing the upside-down state of the lens portion of the vehicle interior lighting device of FIG. 1, and FIG. 6 is a cross-sectional view of the main part showing the bus bars and contacts of the vehicle interior lighting device of FIG.

  1 to 6, the vehicle interior lighting device 1 according to the first embodiment includes a functional unit 10, a design unit 20 to which the functional unit 10 is assembled, and a flexible flat cable (FFC) connected to the functional unit 10. 2).

  The function unit 10 is provided with a pair of light source units 11 and a bus bar unit 12 constituting a switch.

  Each light source unit 11 is connected to the flexible flat cable 2 at a predetermined interval, and is fitted with a bulb 13. Each light source unit 11 is turned ON / OFF by a switch described later, and the lighting / non-lighting of the bulb 13 can be switched.

  The bus bar portion 12 is housed in the switch case 14 together with the flexible flat cable 2, and the flexible flat cable 2 is crimped and held on the pressure contact portion by the strain relief cover 15, and a part of the bus bar portion 12 is shown in FIG. It is exposed on the lower surface of. As shown in FIG. 6, the bus bar portion 12 includes a plurality of bus bars 12 a and insulating portions 12 b formed between the bus bars 12 a, and contacts 25 incorporated in a contact holding portion 23 described later of the design portion 20. And conducting and connecting the flexible flat cable 2.

  Each of the insulating portions 12 b of the bus bar portion 12 is formed with a convex portion 12 c in a required convex shape with respect to the contact 25. Each of the convex portions 12 c is engaged with the hemispherical indent 25 c of the contact 25 in association with the assembly of the functional portion 10 to the design portion 20, so that the indent 25 c comes into contact with the corresponding bus bar 12 a of the bus bar portion 12. To induce.

  Further, each of the convex portions 12c increases the creeping distance between the bus bars 12a of the bus bar portion 12. Thereby, even when a high voltage is applied to the bus bar portion 12, high insulation between the bus bars 12a is ensured.

  Further, each of the convex portions 12c engages and gets over the indent 25c when the indent 25c of the contact 25 is guided to the corresponding bus bar 12a of the bus bar portion 12. This gives a sense of moderation to the switch operation without requiring a dedicated mechanism.

  The design unit 20 includes a lens unit 21, a gate-type light source holding unit 22, a gate-type contact holding unit 23, and a light-shielding housing 24.

  The lens unit 21 transmits, condenses, or diffuses the light from the bulb 13 of the light source unit 11. A light source holding unit 22 and a contact holding unit 23 are provided on the inner surface side of the lens unit 21.

  The light source holding part 22 is provided on the inner surface side of the lens part 21, and each light source part 11 is fitted and inserted when the functional part 10 is assembled to the design part 20. As a result, the light source holding unit 22 holds each light source unit 11 connected to the flexible flat cable 2 on the inner surface side of the lens unit 21.

  The contact holding portion 23 is provided on the inner surface side of the lens portion 21 and incorporates a contact 25 and a switch knob 26 that constitute a switch together with the bus bar portion 12. When the functional unit 10 is assembled to the design unit 20, the contact holding unit 23 is inserted into the bus bar unit 12 connected to the flexible flat cable 2 so that the bus bar unit 12 is placed on the inner surface side of the lens unit 21. The bus bar portion 12, the contact 25, and the switch knob 26 are connected to a state that functions as a switch of the light source portion 11.

  The contact 25 disposed in the gate of the contact holding part 23 makes an electrical connection / disconnection between the circuits of the bus bar part 12. That is, the contact 25 is formed with a plurality of spring pieces 25b each having a slit 25a and elastically deformable independently of each other, and has flexibility. The contact 25 is provided with an indent 25 c and is inclined along the direction in which the bus bar portion 12 is inserted into the contact holding portion 23 of the design portion 20.

  The indent 25 c of the contact 25 comes into contact with the corresponding bus bar 12 a of the bus bar portion 12 by the convex portion 12 c formed on the insulating portion 12 b of the bus bar portion 12 in association with the assembly of the functional portion 10 to the design portion 20. Is guided and touched. Thereby, the favorable conduction | electrical_connection state of the contact 25 and the bus-bar 12a is ensured.

  Further, the indent 25 c of the contact 25 is slid on the surface of the bus bar 12 a as the function unit 10 is assembled to the design unit 20. Thereby, the oxide film on the surface of the bus bar 12a is scraped off, and a reliable electrical connection is obtained from the beginning between the indent 25c of the contact 25 and the bus bar 12a, and the contact pressure is stabilized. Thereby, the favorable conduction | electrical_connection state of the contact 25 and the bus-bar 12a is ensured.

  Furthermore, each spring piece 25b of the contact 25 individually contacts the bus bar 12a with a predetermined contact pressure. Thereby, the contact pressure between each spring piece 25b and the bus bar 12a can be adjusted individually or constantly.

  The switch knob 26 incorporated in the contact holder 23 is a member to be operated when the bulb 13 of the light source unit 11 is turned ON / OFF, and fixes the contact 25.

  The light shielding housing 24 is mounted on the inner surface side of the lens portion 21 and covers the inner surface side central portion of the lens portion 21 surrounded by the light source holding portion 22 and the contact holding portion 23. The light shielding housing 24 blocks light upward from the bulb 13 of the light source unit 11 in FIG. 1 and reflects it to the lens unit 21 side (downward in FIG. 1).

The operation of this embodiment will be described.
With the assembly of the functional unit 10 to the design unit 20, the light source unit 11 of the functional unit 10 connected to the flexible flat cable 2 is inserted into the light source holding unit 22 of the design unit 20 and the inner surface of the lens unit 21. Held on the side.

  In addition, the bus bar portion 12 of the functional portion 10 connected to the flexible flat cable 2 is fitted into the contact holding portion 23 of the design portion 20 and held on the inner surface side of the lens portion 21. At this time, the bus bar portion 12 fitted in the contact holding portion 23, the contact 25 and the switch knob 26 incorporated in advance in the contact holding portion 23 are in a state of functioning as a switch of the light source portion 11.

  FIG. 7 is a cross-sectional view of the main part showing the bus bars and contacts of the vehicle interior lighting device according to the second embodiment of the present invention.

  Referring to FIG. 7, in the vehicle interior lighting device according to the second embodiment, the insulating portion 12b of the bus bar portion 12 is not formed with the convex portion 12c (see FIG. 6). Each of the bus bars 12a of the portion 12 is formed with a concave portion 12d in a required concave shape with respect to the contact 25 so that the bus bar 12a and the indent 25c are connected well.

When the switch knob 26 is slid after the functional part 10 is assembled to the design part 20, the concave parts 12d receive the indents 25c of the contacts 25 respectively, so that the operator is confirmed to be held at the connection position of the bus bar 12a. It is possible to obtain a moderation feeling with a small number of parts without using a complicated structure. Further, the curvature of the indent 25c of the contact 25 and the concave portion 12d of the bus bar 12a are substantially approximated, so that the indent 25c can secure a good contact point as compared with the case where the bus bar 12a is flat, Heat generation at the contact portion can be suppressed with respect to the allowable current.
Other configurations and operations are the same as those in the first embodiment.

  FIG. 8 is a cross-sectional view of a main part showing bus bars and contacts of the vehicle interior lighting device according to the third embodiment of the present invention.

  Referring to FIG. 8, in the vehicle interior lighting device of the third embodiment, each of the insulating portions 12 b of the bus bar portion 12 has a convex portion 30 with respect to the contact 25 (see FIGS. 6 and 7). It is formed in a convex shape. In addition, each of the bus bars 31 of the bus bar portion 12 is formed in a curved shape that is a required concave shape with respect to the contact 25, and is arranged alternately with the convex portions 30 following the convex portion 30. That is, the bus bar portion 12 is formed in a waveform in cross-sectional view as a whole by combining the convex portions 30 of the insulating portions 12b and the curved shape of the bus bar 31 that are alternately continuous.

As the functional part 10 is assembled to the design part 20, the convex part 30 of the bus bar part 12 contacts the indent 25 c (see FIGS. 6 and 7) of the contact 25 with the corresponding bus bar 31 of the bus bar part 12. Invite them to do. Each of the curved bus bars 31 continuing to the convex portion 30 guides the indent 25c of the contact 25 guided by the convex portion 30 to a predetermined position in the bus bar 31. As a result, when the indent 25c of the contact 25 is displaced from the apex of the convex portion 30, it slides inertially to the bus bar 31 and is guided to the corresponding bus bar 31 of the bus bar portion 12 more smoothly and surely and is brought into contact with an accurate position. The
Other configurations and operations are the same as those in the first embodiment.

  FIG. 9A is a main part schematic plan view showing the bus bar and the contact of the vehicle interior lighting device according to the fourth embodiment of the present invention, and FIG. 9B is a perspective view of the bus bar part.

  Referring to FIG. 9, in the vehicle interior lighting device of the fourth embodiment, the insulating portion 12 b of the bus bar portion 12 has a protruding curved surface, and each of the insulating portions 12 b holds a contact of the design portion 20 (see FIG. 1). The direction of entry of the bus bar portion 12 into the contact 25 of the bus bar portion 12 with the insertion of the bus bar portion 12 into the portion 23 (see FIG. 1) (in the direction of arrow A in FIG. 9A) (in FIG. 9A) The required guide shape 40 (sharp shape in FIG. 9) is formed on the lower side.

By the guide shape 40 of the insulating portion 12b of the bus bar portion 12, the indent 25c of the contact 25 entering along the direction of the arrow B is guided to a predetermined position (for example, the power OFF position), and with respect to the bus bar 12a of the bus bar portion 12 It is sure to be in contact. As a result, the initial position of the switch can be set only by inserting the bus bar portion 12 into the contact holding portion 23 of the design portion 20, and good workability is ensured.
Other configurations and operations are the same as those in the first embodiment.

  FIG. 10A is a main part schematic plan view showing the bus bar and the contact of the vehicle interior lighting device according to the fifth embodiment of the present invention, and FIG. 10B is a perspective view of the bus bar part.

Referring to FIG. 10, in the vehicle interior lighting device of the fifth embodiment, the approach side to the contact 25 (the lower side in FIG. 10A) rather than the guide shape 40 of the insulating portion 12 b of the bus bar portion 12. A standby taper portion 50 having a triangular shape in plan view is formed. The standby taper portion 50a guides the indent 25c1 of the contact 25 entering in the direction of the arrow before the guide shape 40 of the insulating portion 12b. To do. By the guide shape 40 and the standby taper portion 50, the indent 25c of the contact 25 is guided to a predetermined position more smoothly and reliably. In other words, the contact 25 can be always guided to the non-lighting position when the bus bar portion 12 is inserted and removed.
Other configurations and operations are the same as those in the fourth embodiment.

  FIG. 11 is a main part schematic cross-sectional view showing a lens part and a light source part of a vehicle interior lighting device according to a sixth embodiment of the present invention.

Referring to FIG. 11, in the vehicle interior lighting device of the sixth embodiment, a light shielding layer 60 is provided on the outer surface side (lower side in FIG. 11) of the lens unit 21, and the light source holding unit 22 and the contact holding unit 23 ( 1). The shadow of the light source holding part 22 and the contact holding part 23 is not visible from the occupant side (lower side in FIG. 11) when the light is lit, and the light source holding part 22 and the contact holding part 23 are provided on the lens part 21. However, the appearance from the passenger compartment is improved.
Other configurations and operations are the same as those in the first embodiment.

  FIG. 12 is a main part schematic cross-sectional view showing a lens part and a light source part of a vehicle interior lighting device according to a seventh embodiment of the present invention.

  Referring to FIG. 12, in the vehicle interior lighting device of the seventh embodiment, a semi-transmissive layer 70 is formed on the entire outer surface side (lower side in FIG. 12) of the lens portion 21. The semi-transmissive layer 70 is a decorative coating layer made of vapor deposition or film in mold.

When the bulb 13 is not lit due to the semi-transmissive layer 70, the inside of the lens becomes a dark part. Therefore, the light from the cabin side is totally reflected on the surface of the semi-transmissive layer 70, and the passenger side (the lower side in FIG. 12). Therefore, the light source holding part 22 and the contact holding part 23 (see FIG. 1) cannot be seen. Further, when the bulb is lit, only the light projecting portion of the bulb (the portion surrounded by the light-shielding housing 24) is brightened, so that the bulb light is transmitted through the semi-transmissive layer 70, but the light source holding portion 22 of the lens portion and If the end face of the contact holding part 23 is arranged so as to be aligned with the side face of the housing 24, even if the holding part is provided with a base end part on the lens side, no shadow is reflected when the bulb is turned on, and the lens part 21 is not impaired. Each functional unit 10 can be arranged on the inner surface.
Other configurations and operations are the same as those in the first embodiment.

  As described above, according to each of the embodiments described above, when the functional unit 10 is assembled to the design unit 20, the light source unit 11 of the functional unit 10 connected to the flexible flat cable 2 is replaced with the light source holding unit 22 of the design unit 20. The bus bar portion 12 of the functional unit 10 connected to the flexible flat cable 2 is inserted into the contact holding portion 23 of the design unit 20.

  Thereby, the light source part 11 and the bus bar part 12 of the function part 10 can be held on the inner surface side of the lens part 21 via the light source holding part 22 and the contact point holding part 23 of the design part 20, respectively. In addition, the bus bar portion 12 fitted in the contact holding portion 23 and the contact 25 and the switch knob 26 incorporated in advance in the contact holding portion 23 can function as switches of the light source portion 11.

  That is, the light source part 11 and the bus bar part 12 of the functional part 10 connected to the flexible flat cable 2 are simply inserted into the light source holding part 22 and the contact point holding part 23 of the design part 20, so that the bus bar part 12, the contact 25 and the switch knob 26 can be made to function as switches of the light source unit 11, and work efficiency can be improved and costs can be reduced. Moreover, the flexible flat cable 2 connected to the functional unit 10 can be held in the air on the inner surface side of the lens unit 21 of the design unit 20, and a special support structure for supporting the flexible flat cable 2 is not necessary. can do.

  Further, the diffused light from the bulb 13 attached to the light source unit 11 is blocked or reflected between the lens unit 21 and the light-shielding housing 24, whereby the light can be efficiently distributed to the lens unit 21 side. Therefore, for example, even when the design part 20 and the function part 10 are arranged for trunk lamps directly under the rear tray of the sedan, it is possible to prevent leakage of bulb light to the trim side of the rear tray. Thereby, it is possible to eliminate the need to provide a means for shielding light on the trim side.

  In addition, since the contact 25 and the switch knob 26 constituting the switch together with the bus bar portion 12 are incorporated in the contact holding portion 23 of the design portion 20, the number of parts of the switch can be reduced and the cost can be reduced. At the same time, the switch can be miniaturized. By downsizing the switch, it is possible to downsize the production equipment for the component parts, reduce the mold cost, and set the molding pressure low. Thereby, improvement of production efficiency can be aimed at and production cost can be reduced.

  Further, since the contact 25 is protected in the gate-type contact holding part 23 when the design part 20 is conveyed alone, deformation of the contact 25 due to interference with other parts can be prevented.

  In each of the above embodiments, there is no need to provide a beam-like rib 157 (see FIG. 16) for holding the valve as in the prior art. Therefore, it is not necessary to make the material of the lens portion 21 cloudy or to rub the outer surface of the lens portion 21 in a glassy manner so that the rib 157 is not visible from the outside. Further, when the bulb light is transmitted through the lens portion 21, the functional portion in the lens such as the rib 157 (see FIG. 16) is not reflected. As a result, the appearance from the passenger compartment can be improved.

  Moreover, in the said embodiment, although the bus-bar part 12, the contact 25, and switch knob 26 which comprise a switch function as a slide switch, it is not restricted to this.

  That is, for example, referring to FIG. 13, a flexible switch operation portion 82 is formed in a convex dome shape on the outer surface side of the lens portion 80 by a film in-mold at a position facing the bus bar 81 in the lens portion 80 of the design portion. In addition, a contact 83 made of conductive printing or a metal contact is provided on the inner surface of the switch operation unit 82. The bus bar 81, the switch operation unit 82, and the contact 83 can be configured as a momentary switch (dome switch).

It is a disassembled perspective view which shows the vehicle interior lighting device which is 1st Embodiment of this invention. It is a principal part perspective view of the vehicle interior lighting device of FIG. It is a perspective view which shows the state upside down of the switch case of the vehicle interior lighting device of FIG. It is a perspective view which shows the contact of the vehicle interior illuminating device of FIG. It is a perspective view which shows the state upside down of the lens part of the vehicle interior lighting device of FIG. It is principal part sectional drawing which shows the bus-bar and contact of the vehicle interior illuminating device of FIG. It is principal part sectional drawing which shows the bus-bar and contact of the vehicle interior illuminating device which is 2nd Embodiment of this invention. It is principal part sectional drawing which shows the bus-bar and contact of the vehicle interior illuminating device which is 3rd Embodiment of this invention. (A) is a principal part schematic plan view which shows the bus-bar and contact of the vehicle interior lighting device which is 4th Embodiment of this invention, (b) is a perspective view of a bus-bar part. (A) is a principal part schematic plan view which shows the bus-bar and contact of the vehicle interior illuminating device which is 5th Embodiment of this invention, (b) is a perspective view of a bus-bar part. It is a principal part schematic sectional drawing which shows the lens part and light source part of the vehicle interior illuminating device which is 6th Embodiment of this invention. It is a principal part schematic sectional drawing which shows the lens part and light source part of the vehicle interior illuminating device which are 7th Embodiment of this invention. It is a principal part schematic sectional drawing which shows the example which comprised the switch as a momentary switch (dome switch). It is a disassembled perspective view which shows the room lamp device for motor vehicles currently disclosed by patent document 1. FIG. FIG. 11 is an exploded perspective view showing a vehicle interior illumination lamp disclosed in Patent Document 2. It is a disassembled perspective view which shows the illuminating device currently disclosed by patent document 3. FIG. It is sectional drawing which shows the room illumination lamp currently disclosed by patent document 4. FIG.

Explanation of symbols

1 Vehicle interior lighting system 2 Flexible flat cable (FFC)
DESCRIPTION OF SYMBOLS 10 Function part 11 Light source part 12 Bus bar part 12a Bus bar 12b Insulation part 12c Convex part 12d Concave part 13 Valve 14 Switch case 15 Strain relief cover 20 Design part 21 Lens part 22 Light source holding part 23 Contact holding part 24 Light-shielding housing 25 Contact 25a Slit 25b Spring piece 25c Indent 26 Switch knob

Claims (7)

A vehicle interior lighting device having a functional part and a design part,
In the function part,
A plurality of light source parts connected with electric wires and fitted with bulbs;
An electric wire is connected, and has a plurality of bus bars and an insulating part formed between the bus bars, and a bus bar part constituting a switch is provided,
In the design part,
A lens unit that allows bulb light from the light source unit to pass through;
A light source holding part that holds the light source part on the lens part by fitting the light source part on the inner surface side of the lens part;
A contact holding part to which a contact and a switch knob attached to the lens part are connected to the bus bar part while holding the bus bar part to the lens part by fitting and inserting the bus bar part on the inner surface side of the lens part,
A vehicle interior lighting device comprising: a portion of the lens portion through which bulb light passes; a light source holding portion; and a housing that covers a part of the contact holding portion. The contact constituting the switch has flexibility, is provided with an indent, and is inclined along the insertion direction of the bus bar portion to the contact holding portion of the design portion,
2. The vehicle interior lighting device according to claim 1, wherein the indentation of the contact is slid on the surface of the bus bar of the bus bar portion in association with the assembly of the functional portion to the design portion.   The vehicle interior lighting device according to claim 2, wherein the contact includes a plurality of spring pieces that can be elastically deformed independently of each other.   The concave portion or the convex portion is formed on each of the slide portions of the bus bar and the insulating portion so that the contact connection position is maintained in either the bus bar or the insulating portion of the bus bar portion. The vehicle interior lighting device according to 2 or 3.   The insulating part of the bus bar is provided with guide means for guiding the indent of the contact to a predetermined position of the bus bar when the contact holding part is inserted. Vehicle interior lighting device.   The vehicle interior lighting device according to any one of claims 1 to 5, wherein a light shielding layer is formed in a portion corresponding to the light source holding part and the contact holding part on the outer surface side of the lens part.   The vehicular interior lighting device according to any one of claims 1 to 6, wherein a semi-transmissive layer is formed on the entire outer surface side of the lens portion.

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