JP2016187986A - Vehicle interior material with lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle interior material with a lighting device which illuminates a wide area in a vehicle cabin with uniform luminance by using a simple structure.SOLUTION: A vehicle interior material includes: an interior material body 13 which has long attachment grooves 12 and is attached facing an interior part of a vehicle cabin; a light source 15; and a transparent material 16 which has a light incident part 16a into which light from the light source 15 enters, a branch part 16b branched from the light incident part 16a in a fork shape, and a pair of radiation parts 16c extending from the branch part 16b along an identical plane 17 in opposite directions and is provided in the interior material body 13 with the radiation parts 16c arranged in the attachment grooves 12.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle interior material with a lighting device, and more particularly, to a vehicle interior material with a lighting device that can divide light from a light source and guide it so as to extend in the longitudinal direction to illuminate a vehicle interior. It is about.

  Conventionally, when an illuminating device is provided in an automobile interior, an illuminating device for occupant irradiation provided on a ceiling between a driver's seat and a passenger seat, an illuminating device provided along an edge of the ceiling in the longitudinal direction of the vehicle, and an automobile A lighting device or the like provided on the inside of the door vehicle is known (for example, see Patent Document 1).

  FIG. 6 shows an example of a conventional vehicle interior material with a lighting device known from Patent Document 1 and the like. In the figure, the arrow F is the front of the automobile and the arrow R is the rear of the automobile. The vehicle interior material shown in FIG. 6 is a ceiling interior material 101. A long mounting groove 102 extending from the vicinity of the front end to the vicinity of the rear end is provided on the side edge of the ceiling interior material 101. In the mounting groove 102, a plurality (three) of lighting devices 103 are disposed over substantially the entire length of the mounting groove 102.

  As shown in FIG. 7, each of the illumination devices 103 includes a rectangular light guide 104, a light source 106 disposed opposite to an end face 105 of the light guide 104, and the light guides. A housing (not shown) for holding 104 and the light source 106 is provided. Then, light from the light source 106 enters the light guide body 104 to light the entire light guide body 104 and indirectly illuminate the passenger compartment. A light diffusing plate 107 is provided at a portion between adjacent light guides 104 so as to bridge between the adjacent light guides 104.

  In the vehicle interior material configured as described above, when the light source 106 is turned on, the light from the light source 106 enters the light guides 104 through the end faces 105 and causes the light guides 104 to emit light over the entire length. . As a result, the light from the light guide 104 illuminates a wide range from the vicinity of the front end to the vicinity of the rear end in the vehicle interior.

Japanese Patent No. 4398452

  However, the conventional illumination device known from Patent Document 1 or the like employs a divided structure in which a plurality of long light guides are arranged in a straight line. Therefore, the accuracy for maintaining the parallelism and coaxiality between the light guides is required, and the structure becomes complicated. In addition, there is a problem that it is difficult to illuminate a wide area in the passenger compartment with uniform brightness and uniformity. Furthermore, since a light diffusing plate that bridges the divided light guides is provided separately, there is a problem that the number of parts increases and the cost increases.

  Accordingly, the present invention has been made in view of the above-described problems, and provides an interior material for a vehicle with an illumination device that can illuminate a wide area in a vehicle interior with uniform brightness and uniformity with a simple structure. It is aimed.

  The present invention has been proposed in order to achieve the above object, and the present invention according to claim 1 includes an interior material body that has a long mounting groove and is mounted facing the vehicle interior, a light source, , A light incident part into which light from the light source enters, a branch part branched in a bifurcated manner from the light incident part, and a pair of irradiation parts extending in opposite directions along the same plane from the branch part And a light guide provided in the interior material main body with the irradiation portion disposed in the mounting groove.

  According to this configuration, in the light guide body in which the irradiation part is disposed in the mounting groove of the interior material body, when light from the light source enters the light incident part, the incident light branches into a bifurcated shape. The light is guided into the pair of irradiation parts extending in the opposite directions from the branched parts, and the pair of irradiation parts shines over the entire length in the mounting groove. In addition, the light guide is not divided, and a pair of irradiation sections are extended in the opposite direction to form a single irradiation section. Therefore, in the illumination device adopting the conventional divided structure, the accuracy for maintaining the parallelism and the coaxiality between the light guides is necessary. In the case of this configuration, the illumination device is integrated without being divided. Therefore, it is not necessary to obtain accuracy. Further, by being integrated, it is possible to reduce the number of parts and to illuminate a wide area in the passenger compartment with uniform brightness and without unevenness.

  According to a second aspect of the present invention, the light guide has the same width as that of the pair of irradiation units, and the bridge portion connecting the base ends of the pair of irradiation units is connected to the pair of irradiation units. It is characterized by being provided along the same plane as the plane from which the part extends.

  According to this configuration, the light incident on the light incident portion from the light source extends in the opposite direction from the bifurcated branch portion, and the base end of the pair of irradiation portions. Are respectively guided into the bridging portion connecting the two, and the pair of irradiation portions and the bridging portion simultaneously shine in the mounting groove. In this way, the pair of irradiating portions and the bridging portion shine at the same time, so that the portion between the base end sides can be prevented from becoming a dark portion, and the design can be enhanced by uniform illumination with uniform illuminance.

  The present invention according to claim 3 is characterized in that the bridging portion has a light exit surface having a light diffusion shape for diffusing light.

  According to this configuration, the bridging portion shines while diffusing light, so that the bridging portion can be made to shine evenly with uniform illumination.

  The present invention according to claim 4 is characterized in that the light guide body is provided with a plurality of sets continuously in the longitudinal direction, with the light incident portion, the branching portion, and a pair of irradiation portions as one set. To do.

  According to this configuration, it is possible to uniformly illuminate a wider area in the vehicle interior with uniform brightness.

  The present invention according to claim 5 is characterized in that a light incident part is provided on a tip end side extending in the outer direction of the pair of irradiation parts, and the light source is provided so as to face the light incident part.

  According to this configuration, light from the light source is also incident on the light guide body from the tip end side extending in the outward direction of the pair of irradiation units, so that the amount of light increases and brighter light is emitted over the entire length. Can be released.

  According to the present invention, since a pair of irradiating portions are extended in the opposite direction without dividing the light guide to form one linear irradiating portion, the illumination device having the conventional divided structure Then, the accuracy for maintaining the parallelism and the coaxiality between the light guides is necessary, but the configuration of the present invention does not require the accuracy. In addition, since the pair of irradiation units is integrated, the number of parts can be reduced, and the structure can be simplified and the cost can be reduced. Furthermore, it is possible to illuminate a wide area in the passenger compartment with uniform brightness and without unevenness.

It is a perspective view of the interior material for vehicles with an illuminating device shown as one Embodiment of this invention. It is a top view which shows the whole structure of the illuminating device of FIG. It is the A section expanded sectional view of FIG. FIG. 4 is an enlarged sectional view taken along line B-B in FIG. 3. It is a top view of the illuminating device shown as a modification. It is a perspective view which shows an example of the conventional interior material for vehicles with a illuminating device. It is a top view which shows the whole structure of the illuminating device shown in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings.

  FIG. 1 shows an interior material for a vehicle with a lighting device as one embodiment of the present invention. The vehicle interior material with a lighting device shown in FIG. 1 is a ceiling interior material 10 for decorating a vehicle interior ceiling. In FIG. 1, the ceiling interior material 10 is viewed from the back side (the roof panel side of the vehicle body). ing. An arrow F in FIG. 1 is the front of the automobile, and an arrow R is the rear of the automobile.

  More specifically, FIG. 1 schematically shows an arrangement configuration of an interior material body 13 constituting the ceiling interior material 10 and a lighting device 11 attached to the interior material body 13.

  The interior material body 13 is formed into a predetermined ceiling shape using a shape-retaining base material such as a foamed resin base material, a fiber base material, a corrugated cardboard base material, and the like on the left and right side edges. Each has a long mounting groove 12 extending from the vicinity of the front end to the vicinity of the rear end. In each mounting groove 12, the lighting device 11 is provided over substantially the entire length of the mounting groove 12. The interior material main body 13 provided with the lighting device 11 as described above is attached to the roof panel of the vehicle body so as to face the vehicle interior.

  The mounting groove 12 of the interior material body 13 is opened to the vehicle interior side. Further, the opening has an area in which the light emitting surface of the light guide, which will be described later, of the illuminating device 11 is directed toward the opening (vehicle interior side), and an irradiation portion of the light guide can be disposed. The mounting groove 12 is formed by a recess or a slit. Further, the opening on the vehicle interior side of the mounting groove 12 is closed with, for example, a milky white light-transmitting cover molding 23 (see FIG. 4) or the like so that the light guide or the like cannot be directly seen from the vehicle interior side. Is considered.

  2 is a plan view showing the overall configuration of the illuminating device 11, FIG. 3 is an enlarged cross-sectional view of a portion A in FIG. 2, and FIG. 4 is a cross-sectional view along the line BB in FIG. In FIG. 2, the housing 14 shown in FIGS. 3 and 4 is omitted.

  2 to 4, the lighting device 11 includes a light source 15, a light guide 16, the housing 14 that holds the light source 15 and the light guide 16, and the like.

  In the present embodiment, the light source 15 employs a single light-emitting diode (preferably a high-intensity LED or an ultra-high-intensity LED), and if necessary, a plurality of light-emitting diodes are used in parallel. The light source 15 uses a light-emitting diode for advantages such as power saving, downsizing, and low heat generation, but is not limited to the light-emitting diode. The light source 15 is turned on / off by operating a switch (not shown).

  The light guide 16 is a molded product made of a light transmissive resin such as acrylic resin, and includes a light incident portion 16a into which light from the light source 15 is incident, and a branch portion branched in a bifurcated manner from the light incident portion 16a. 16b, a pair of irradiation portions 16c extending in opposite directions along the same plane 17 from the branch portion 16b, a bridging portion 16d connecting the base end 18 sides of the pair of irradiation portions 16c, etc. Are integrated. In this embodiment, all cross sections of the light incident part 16a, the branching part 16b, the irradiation part 16c, the bridging part 16d, etc. are long in the left-right direction (vehicle width direction) as shown in FIG. The rectangular shape is short in the vertical direction, and the width of the bridging portion 16d in the left-right direction (vehicle width direction) is the same as the width of the irradiation portion 16c.

  In the resin material forming the light guide 16, micro particles that scatter light are mixed in a predetermined ratio. Then, by using the light guide 16 in which micro particles are dispersed at a predetermined ratio, the light incident on the light guide 16 changes its optical path due to the interference of the particles and is complicated in the light guide 16. Following the path, the light guide 16 is gradually emitted out of the light guide 16 (inside the vehicle compartment) from the exposed side surface (light-emitting surfaces 20 and 21 described later) of the light guide 16. As a result, the light guide 16 into which light is incident from the light incident portion 16a emits light over the entire length, and illumination in a wide range in the length direction of the vehicle interior is performed.

  The light incident portion 16a is arranged so that the end surface 19 is disposed opposite to the light source 15 and the light from the light source 15 enters.

  The branch portion 16b is bifurcated from the light incident portion 16a with a predetermined radius of curvature, and the branched tip ends are directed in the opposite directions on the same plane 17, and the tip of the branch portion 16b. In addition, the base ends 18 of the pair of irradiation portions 16c are connected to each other so that the pair of irradiation portions 16c extend in the opposite directions along the same plane 17. The lengths of the pair of irradiation units 16c are set to the same size, and in the embodiment, the surface arranged facing the vehicle interior side (the surface facing the lower side in the embodiment) is the light output of the irradiation unit 16c. Set as face 20. In addition, as shown in FIG. 2, a light incident portion 16e is provided integrally with each of the tip portions 22 of the pair of irradiation portions 16c, and the light incident portion 16e is provided with the light incident portion. The light sources 15 different from the light sources 15 arranged to face the end surface 19 of the part 16a are arranged to face each other. It should be noted that the light incident part 16e and the light source 15 provided on each tip part 22 side of the pair of irradiation parts 16c are not necessarily required. In the case where the light incident portion 16e and the light source 15 are provided, the light from the light source 15 is also incident on the irradiation portion 16c and the bridging portion 16d from the distal end portion 22 side of the pair of irradiation portions 16c. The total amount of light in the inside increases, and bright light can be emitted over the entire length.

  The bridging portion 16d connects the base ends 18 of the pair of irradiation portions 16c connected to the distal ends of the branching portions 16b, and the pair of irradiation portions 16c on the same plane 17 They are arranged in a straight line. As in the case of the pair of irradiation units 16c, the bridging portion 16d has a surface facing the vehicle interior side (a surface facing the lower side in the embodiment) set as the light exit surface 21 of the bridging portion 16d. The The light exit surface 21 of the bridging portion 16d is formed with a light diffusion shape so that the light guided into the bridging portion 16d can be diffused and emitted to the vehicle interior side. As shown in FIG. 3, the light diffusion shape in the present embodiment is provided with triangular concave and convex grooves, but may be a conical shape as long as light diffusion can be performed. The light diffusion shape provided on the light exit surface 21 is for adjusting the brightness of the emitted light on the light exit surface 20 of the irradiating portion 16c and the brightness on the light exit surface 21 of the bridging portion 16d so that there is no unevenness. . Therefore, you may provide a light-diffusion shape in both the light emission surface 20 of the irradiation part 16c, and the light emission surface 21 of the bridge part 16d.

  The housing 14 is a resin molded product, and is formed in a rail shape having a substantially U-shaped cross section as shown in FIG. 4, and the lower surface side (vehicle compartment) corresponding to the mounting groove 12 of the interior material body 13. The inside is open. In the housing 14, the light output surface 20 of the pair of irradiation portions 16 c and the light output surface 21 of the bridging portion 16 d in the light guide 16 are exposed from the opening on the lower surface side, respectively. And the volume which can accommodate the light source 15 is ensured. Further, by housing the light guide 16 and the light source 15 in the housing 14, the unitized lighting device 11 is formed. Therefore, the illuminating device 11 is attached to the back surface side (the side facing the roof panel of the vehicle body) of the interior material body 13 in the united state. Furthermore, the opening of the mounting groove 12 of the interior material main body 13 is closed by, for example, a milky white light-transmitting cover molding 23 as shown in FIG. 4, and the interior of the mounting groove 12 is not directly visible from the vehicle interior side. To be considered.

  The ceiling interior material (vehicle interior material) 10 thus configured is attached to the roof panel of the vehicle body facing the vehicle interior. When the light source 15 facing the end surface 19 of the light incident portion 16a and the light source 15 corresponding to the tip portion 22 of the pair of irradiation portions 16c are turned on, the light source 15 is paired with the end surface 19 of the light incident portion 16a. Light enters the light guide 16 from the tip 22 of the irradiation section 16c. In addition, the light incident on the light guide 16 changes its optical path due to particle interference, follows a complicated path in the light guide 16, and is exposed to the exposed side surfaces (light-emitting surfaces 20 and 21) of the light guide 16. From what has arrived, the light is gradually emitted out of the light guide 16. As a result, the light guide 16 in which light is incident from the light incident part 16a and the light incident part 16e emits light over the entire length, and illumination in a wide range in the length direction in the passenger compartment is performed.

  Therefore, according to the vehicle interior material (ceiling interior material 10) according to the present invention, the light guide body 16 is not divided, and the pair of irradiation portions 16c are extended in the opposite direction to form one linear irradiation. Therefore, in the lighting device having the conventional divided structure, it is necessary to have accuracy for maintaining the parallelism and the coaxiality between the light guides. Is no longer necessary. In addition, since the pair of irradiation units 16c are integrated, the number of parts can be reduced, the structure can be simplified, and the cost can be reduced. Furthermore, it is possible to illuminate a wide area in the passenger compartment with uniform brightness and without unevenness.

  Further, the light guide 16 has a bridging portion 16d connecting the base end 18 sides of the pair of irradiation portions 16c with the same width as the vehicle width of the pair of irradiation portions 16c, and the pair of irradiation portions 16c. Are provided along the same plane 17 extending from the light source 15, so that the light incident on the light incident portions 16a and 16e from the light source 15 is a pair of the irradiation portions 16c and the base of the pair of irradiation portions 16c. The light is guided into the bridging portion 16 d connecting the ends 18, and the pair of irradiation portions 16 c and the bridging portion 16 d shine in the mounting groove 12. Therefore, when the bridging portion 16d shines, it is possible to prevent the portion between the base end 18 sides of the pair of irradiation portions 16c from becoming a dark portion, and to shine evenly with uniform illuminance.

  In addition, since the light diffusing shape for diffusing light is provided on the light exit surface 21 of the bridging portion 16d, the bridging portion 16d shines while diffusing light, and the bridging portion 16d shines evenly with uniform illumination. be able to.

  Moreover, although the said light guide 16 demonstrated the case where the light guide 16 provided the light-incidence part 16a, the branch part 16b, one pair of irradiation part 16c, and one bridge part 16d, it is restricted to this structure. For example, as shown in FIG. 5, for example, a light incident part 16a, a branching part 16b, and a pair of irradiation parts 16c (including a bridging part 16d in some cases) are used as a set (see FIG. 5). In some cases, two sets) may be provided continuously in the longitudinal direction. That is, the light guide 16 of the lighting device 11 shown in FIG. 5 is formed by connecting the irradiation units 16c and 16c adjacent to each other out of the pair of irradiation units 16c. In FIG. 5, the same reference numerals as those shown in FIGS. 1 to 4 are the same as those described in FIGS. 1 to 4. In the case of this structure, it is possible to illuminate a wider area in the passenger compartment with uniform brightness and more evenly.

  Moreover, the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within a scope that can achieve the object of the present invention are included in the present invention.

10 Ceiling interior materials (interior materials for vehicles)
DESCRIPTION OF SYMBOLS 11 Illuminating device 12 Mounting groove 13 Interior material main body 14 Housing 15 Light source 16 Light guide 16a Light incident part 16b Branching part 16c Irradiation part 16d Bridge part 16e Light incident part 17 The same plane 18 The base 19 of an irradiation part 19 End surface 20 Irradiation Light exiting surface 21 Light exiting surface 22 at bridging portion Tip 23 Cover molding

Claims (5)

An interior material body that has a long mounting groove and is mounted facing the vehicle interior;
A light source;
A light incident portion on which light from the light source is incident, a branch portion that is bifurcated from the light incident portion, and a pair of irradiation portions that extend in opposite directions along the same plane from the branch portion; A light guide provided in the interior material body by disposing the irradiation part in the mounting groove;
An interior material for a vehicle with a lighting device, comprising:   The light guide has a width that is the same as the width of the pair of irradiation units and a bridge portion that connects the base ends of the pair of irradiation units, and a plane on which the pair of irradiation units extends. The interior material for a vehicle with a lighting device according to claim 1, wherein the interior material is provided along the same plane.   The interior material for a vehicle with an illuminating device according to claim 2, wherein the bridging portion has a light exit surface having a light diffusion shape for diffusing light.   The said light guide is provided with the said light incident part, the said branch part, and one pair of irradiation parts as one set, and multiple sets are provided continuously in the longitudinal direction. The vehicle interior material with a lighting device according to any one of the above.   5. The light source according to claim 1, wherein the light source is provided on a tip end side extending in the outer direction of the pair of irradiation units, and the light source is provided to face the light incident unit. The interior material for vehicles with an illuminating device of description.

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