WO2016031296A1

WO2016031296A1 - Vehicle interior illumination device

Info

Publication number: WO2016031296A1
Application number: PCT/JP2015/061835
Authority: WO
Inventors: 関　利彦; 正人大科; 啓介鳥飼
Original assignee: 河西工業株式会社
Priority date: 2014-08-28
Filing date: 2015-04-17
Publication date: 2016-03-03
Also published as: JP2016047693A

Abstract

The purpose of the present invention is to provide a vehicle interior illumination device that can achieve a decrease in the number of components to be managed by being made versatile, and that can be provided inexpensively through cost reduction. The vehicle interior illumination device (18) is provided with: an interior material body (13) having an illumination window (20c) and being mounted facing the inside of a cabin (31); a light source (22); and a light guide member (23) formed in bar shape with a rectangular or circular cross section. The light guide member (23) has a light entrance face (25a) formed on one end face opposed to the light source (22), a plurality of light exit faces (25b to 25e) disposed successively at predetermined intervals in a circumferential direction and each including a side face along a light guide direction, and a plurality of recess portions (26) formed on each of the light exit faces (25b to 25e) at predetermined intervals forming a line along the light guide direction (24), the positions of the recess portions being successively shifted in the light guide direction (24) among the light exit faces (25b to 25e), each of the recess portions having a total reflection cut face (26a) on the inner face thereof, the light guide member (23) being disposed so as to correspond to the illumination window (20c) of the interior material body (13).

Description

Vehicle interior lighting device

The present invention relates to a vehicle interior lighting device.

Conventionally, various structures have been adopted as devices for illuminating the interior of a car or the like (hereinafter referred to as “vehicle interior”). In addition, the illumination has a structure in which the light from the LED light source is guided to a predetermined location via an optical fiber (for example, see Patent Document 1), and the light from the LED light source is transmitted through a rod-shaped light guide. A structure having a structure in which light is guided to a predetermined location and the entire light guide is illuminated to illuminate (for example, see Patent Document 2) is known.

The light guide and the illumination device known from Patent Document 1 have a structure in which a plurality of optical fibers are used as a light guide, and light from an LED light source is guided to a predetermined location via the optical fiber for illumination. In this structure, since a plurality of branched optical fibers are used, the structure becomes complicated and the mounting workability is poor.

On the other hand, in a structure in which the light from the LED light source is guided to a predetermined location via a rod-shaped light guide and the entire light guide is emitted to illuminate, as known in Patent Document 2, the light guide is used. Since the whole body emits light, there is a problem that the amount of irradiation in the target direction is not small.

Therefore, for example, as shown in FIG. 12 and FIG. 13, an illumination device using a light guide provided with a total reflection cut surface for irradiating spot light in a target direction is also considered. The lighting device 101 shown in FIGS. 12 and 13 includes a light guide 102 and an LED light source 103.

The light guide body 102 is a rectangular bar-shaped molded product having a rectangular cross section made of a light-transmitting resin such as acrylic resin. The light guide body 102 is opposed to the LED light source 103 with the light incident surface 102a at one end surface. Of the pair of

side surfaces

102b and 102c, one side surface 102b is a light exit surface (hereinafter referred to as "light exit surface 102b"), and the other side surface 102b is a light control surface (hereinafter referred to as "light control surface 102c"). Said).

The light control surface 102c has a plurality of concavities 104 formed in a conical section from the outer side to the inner side (light emission surface 102b side) of the light guide 102, from one end surface side (light incident surface 102a). These are provided in the form of dots at predetermined intervals respectively toward the other end surface facing this, that is, in the light guide direction indicated by the arrow 105 in FIG. In each of the concave portions 104, light L11 (not shown) from the LED light source 103 enters the light guide 102, and the light L11 is conical surface 104a (hereinafter referred to as “total reflection cut surface 104a”). In this case, the light hitting the total reflection cut surface 104a is totally reflected toward the light emitting surface 102b, and is irradiated as the spot light L12 onto the irradiation surface facing the light emitting surface 102b.

12 and 13, when the LED light source 103 is turned on and light L11 is emitted from the LED light source 103 toward the light incident surface 102a, the light L11 is emitted from the light incident surface 102a. Incident into the light guide 102. The light L11 incident on the light guide 102 proceeds in the light guide direction 105 while repeating diffuse reflection due to internal reflection in the light guide 102, and the entire light guide 102 is emitted. And the circumference | surroundings of the illuminating device 101 can be illuminated with the emitted light. At the same time, the light L11 that hits the total reflection cut surface 104a of the concave portion 104 in the light guide 102 is reflected by the total reflection cut surface 104a in the direction of the light emission surface 102b, and is guided from the light emission surface 102b to the light guide 102. Is emitted as spot light L12 outside. Therefore, on the irradiated surface that is struck by the spot light L12, in addition to the light illuminated by the light guide 102 itself shining, there is irradiation of the spot light L12, so that a brighter light amount can be obtained.

However, the lighting device 101 as shown in FIGS. 12 and 13 is restricted in the mounting direction so that the light guide 102 needs to be mounted with the single light emitting surface 102b facing the irradiation surface. There is. Therefore, for example, when the lighting device 101 is incorporated in an interior material body such as an automobile door, a center console, or a roof panel, it is often attached to the left and right positions of the automobile. The direction in which the emission surface 102b is directed is often different. In such a case, in the conventional vehicle interior illumination device, it is necessary to separately prepare the vehicle interior illumination devices in which the directions of the light emitting surface 102b are different on the left and right. For this reason, the number of parts to be managed is increased, and there is a problem that the cost is increased.

Japanese Patent Application Laid-Open No. 2005-19154. Japanese Patent No. 4398452.

Therefore, the present invention has been made in view of the above problems, and provides a vehicle interior lighting device that can be provided at low cost by reducing the number of parts to be managed with general versatility and reducing costs. It is an object.

The present invention has been proposed in order to achieve the above object. (1) A vehicle interior lighting device according to a first aspect of the present invention is provided with an illumination window so as to face the vehicle interior. An interior material main body, a light source, and a light guide formed in a rod shape having a square or circular cross section, a light incident surface formed on one end surface facing the light source, and a predetermined interval in the circumferential direction in order A plurality of light exit surfaces each having a side surface along the light guide direction, a plurality of light exit surfaces each having a predetermined interval for each light exit surface, and formed in a row in the light guide direction, Each position of each light exit surface is sequentially shifted in the light guide direction, and has a recess having a total reflection cut surface on each inner surface, so as to correspond to the illumination window of the interior material body The light guide is provided.

(2) Each recess formed on one light exit surface of the plurality of light exit surfaces is provided at a position that does not overlap with at least each recess formed on the other light exit surface facing each other. May be.

(3) Each recessed part may be provided with the space | interval which becomes narrow in order as it progresses in the said light guide direction.

(4) Each recess may be conically recessed from the outside to the inside of the light guide.

(5) Each recess may be formed larger in order in the light guide direction.

(6) In the above (1) to (5), the interior material body may be formed as a door trim of a vehicle door.

(7) In the above (1) to (5), the interior material body may be formed as a center console body of a center console.

(8) In the above (1) to (5), the interior material body may be formed as an interior material for a roof panel.

According to the present invention, a vehicle interior lighting device that can be provided at low cost by providing versatility, reducing the number of components to be managed, and reducing costs is expected.

It is a perspective view which shows embodiment of the vehicle door which employ | adopted the vehicle interior lighting device of this invention. FIG. 2 is an enlarged sectional view taken along line AA in FIG. 1. It is a schematic explanatory drawing of the vehicle interior illuminating device used for the vehicle door shown in FIG. It is a top view which fractures | ruptures and shows a part of illuminating device for vehicle interiors of FIG. FIG. 4 is an enlarged sectional view taken along line BB in FIG. 3. It is a figure explaining the structure of the light guide in the illuminating device for vehicle interior shown in FIG. 3, and the top view seen from the arrow (a) direction of FIG. 3, and the plane seen from the arrow (b) direction in order from the top It is a top view seen from a figure and an arrow (c) direction, and a top view seen from an arrow (d) direction. It is sectional drawing explaining the modification of a light guide. It is a perspective view which shows schematic arrangement | positioning structure in the vehicle interior which employ | adopted the vehicle interior lighting device of this invention for the center console. FIG. 9 is an enlarged sectional view taken along the line CC of FIG. 1 is a perspective view showing a schematic arrangement configuration in a vehicle compartment in which a vehicle interior lighting device of the present invention is adopted in a vehicle ceiling. FIG. 11 is an enlarged sectional view taken along line DD of FIG. 10. It is a perspective view explaining an example of the conventional vehicle interior lighting device. It is the side view seen from the arrow E direction of FIG.

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

FIG. 1 and FIG. 2 are views showing an embodiment of a vehicle door adopting the vehicle interior lighting device of the present invention. 1 is a perspective view of a vehicle door as seen from the vehicle interior side, and FIG. 2 is an enlarged cross-sectional view taken along line AA of FIG.

1 and 2, a vehicle door 11 (hereinafter simply referred to as “door 11”) includes an interior material body (door trim) 13 attached to the inner surface of a door panel (inner panel) 12. The interior material body 13 is also provided with a door pocket 14, a switch panel 15 as a retrofitted functional component, an operation member 16, and the like.

The interior material body 13 is integrally formed with a resin core material formed into a desired curved surface shape by molding press molding PP resin (polypropylene resin) mixed with talc, and when the resin core material is press molded. It is composed of a skin material such as a TPO (thermoplastic olefin) sheet. Further, the interior material body 13 is provided with a pocket opening 14a of the door pocket 14 below the armrest 17 swelled to the vehicle interior side, and the inside of the door pocket 14 and the like are provided at the periphery of the pocket opening 14a. A vehicle interior lighting device 18 (hereinafter simply referred to as “illuminating device 18”) to be illuminated is attached.

The structure around the door pocket 14 will be described in further detail using FIG. The door pocket 14 has a pocket front cover 19 that forms a wall surface 19a on the front side of the door pocket 14 so as to sandwich the pocket opening 14a, and a side wall surface 20a and a bottom surface 20b on the rear side of the door pocket 14 (hereinafter referred to as “inner bottom surface”). 20b ") and a pocket back cover 20.

The pocket back cover 20 has an illumination window 20c opened corresponding to the upper hole edge of the pocket opening 14a along the upper hole edge of the pocket opening 14a from the front end side of the pocket opening 14a. It is formed toward the end side. An accommodation portion 20d for accommodating and arranging the illumination device 18 is provided in communication with the illumination window 20c, located immediately behind the illumination window 20c. In the housing portion 20d, a unitized lighting device 18 to be described later brings a light guide 23 to be described later along the illumination window 20c, and the light guide 23 directly from the vehicle interior side. It is installed so that it cannot be seen. Further, an insole 21 is detachably laid on the inner bottom surface 20b of the door pocket 14.

The illumination device 18 includes a light source 22 and a light guide 23 as shown in FIGS.

The light source 22 uses a single light-emitting diode (preferably a high-intensity LED or an ultra-high-intensity LED) in this embodiment. The light source 22 uses a light-emitting diode because of its advantages such as power saving, miniaturization, and low heat generation, but is not limited to the light-emitting diode. Further, the on / off control of the light source 22 can be performed by operating a switch (not shown).

The light guide 23 is a molded product made of a light transmissive resin such as acrylic resin. Moreover, the shape which crossed perpendicularly with respect to the light guide direction (direction along a long axis) mentioned later shown by the arrow 24 in FIG.3 and FIG.4 is formed in the square-bar shape which made the regular tetragon shape. In the light guide 23, one end surface to which the light source 22 is attached so as to face the substrate 28 and the holder 29 is a light incident surface 25 a on which the light L <b> 1 from the light source 22 is incident. The four

side surfaces

25b, 25c, 25d, and 25e that are provided in order in the light guide direction 24, respectively, are light emission surfaces that also serve as light control surfaces. Hereinafter, the side surface 25b is referred to as “light emitting surface 25b”, the side surface 25c is referred to as “light emitting surface 25c”, the side surface 25d is referred to as “light emitting surface 25d”, and the side surface 25e is referred to as “light emitting surface 25e”. In the light guide 23, when the light source 22 is turned on, the light L1 from the light source 22 enters the light guide 23 from the light incident surface 25a, and the light L1 entered from the light incident surface 25a 23, while the diffuse reflection is repeated by the internal reflection in 23, it proceeds to the other end surface facing the light incident surface 25a. That is, the light guide direction 24 is a direction along the long axis in which light travels from the light incident surface 25 a side to the other end surface side in the light guide 23.

Further, the light emitting surfaces 25b to 25e are provided with a predetermined distance in the light guide direction 24 at a substantially central portion in the width direction of the light emitting surfaces 25b to 25e (a direction perpendicular to the light guide direction 24). A plurality of recesses 26 are provided in a row in the form of dots. As shown in FIG. 5, each recess 26 is formed as a recess recessed in a conical shape from the outer side to the inner side of the light guide 23, and a total reflection cut surface on the inner surface (the inner side of the light guide 23). 26a is formed. Each total reflection cut surface 26a functions to reflect the hit light in the direction of the light emitting surfaces 25b to 25e facing each other when the light hits the total reflection cut surface 26a in the light guide 23.

In addition, as shown in FIG. 6, the recesses 26 provided on the light exit surfaces (25b to 25e) are adjacent to each other in the circumferential direction when the interval between the recesses 26 of the light exit surface 25b is 1 pitch (1P). Light emitting surfaces that meet each other, that is, light emitting surface 25b and light emitting surface 25c, light emitting surface 25c and light emitting surface 25d, light emitting surface 25d and light emitting surface 25e, and light emitting surface 25e and light emitting surface 25b. The intervals at are respectively shifted in the light guide direction 24 by about a quarter pitch width (1 / 4P) in order and formed in a spiral shape. In addition, the diameter of the recessed part 26 is smaller than the quarter pitch width (1 / 4P), and the direction in which the recessed part 26 provided in one light-emitting surface and the other light-emitting surface which face each other oppose each other. It is preferable to form the layers so as not to overlap each other (a direction perpendicular to the light guide direction 24).

Furthermore, each recess 26 is provided so that the distance from each recess 26 becomes narrower and the density becomes higher as the light guide direction 24 is advanced. That is, when the interval between the recesses 26 is reduced in order as the light guide direction 24 is increased and the density is increased, the light also attenuates and gradually decreases as the light guide direction 24 is advanced. When the interval 26 is narrowed, the interval between the spotlights is also reduced, and the amount of light irradiated on the irradiation surface 27 side is increased as it advances toward the terminal end side in the light guide direction 24, so that the total amount of irradiation light can be averaged.

It should be noted that a configuration in which a recess 26 is provided between a pair of light emission surfaces 25b and 25d facing each other, and a pair of light emission surfaces 25c and 25e, for example, a light emission surface 25d near the light incidence surface 25a. The concave portion 26 is provided only on the light emitting surface 25e side, and the concave portion 26 is shifted in a zigzag manner to the light emitting surface 25b and the light emitting surface 25d, and the light emitting surface 25c and the light emitting surface 25e at an intermediate point in the light guide direction 24. Alternatively, the recess 26 may be provided only on the light exit surface 25b and the light exit surface 25c side on the end side.

When the light source 22 is turned on, the vehicle interior lighting device 18 thus formed is irradiated with the light L1 from the light source 22 toward the light incident surface 25a as shown in FIG. 4, and the light L1. Enters the light guide 23 from the light incident surface 25a. Further, the light L1 incident in the light guide 23 proceeds in the light guide direction 24 while repeating diffuse reflection due to internal reflection in the light guide 23, and the entire light guide 23 is emitted. Become. Therefore, these emitted lights are emitted in all directions by the respective light emission surfaces (25b to 25e), and can illuminate the surroundings of the vehicle interior illumination device 18.

At the same time, the light L1 that hits the total reflection cut surface 26a of the recess 26 in the light guide 23, as shown by the dotted line in FIGS. 3 and 5, is a light emitting surface (25b to 25b) facing the reflection cut surface 26a. 25e) is reflected in the direction, emitted from each light exit surface (25b to 25e) to the outside of the light guide 23 as spot light L2, and has a circular spot irradiation range (hereinafter, this is indicated by a dotted line 30 in FIG. 3). (Referred to as “spot irradiation range 30”). 3 shows only the spot light L2 and the spot irradiation range 30 emitted from the light emitting surface 25d, the spot light L2 is actually emitted from each of the light emitting surfaces (25b to 25e). Is.

Then, as shown in FIG. 2, the illuminating device 18 configured in this way has any one of the light emitting surfaces (25b to 25e) in the accommodating portion 20d of the pocket back cover 20. In the present embodiment, the light emitting surface 25d) is attached to the pocket back cover 20 in a state in which a gap is provided between the light emitting surface 25d) in the illumination window 20c, that is, the inside of the door pocket 14 and the housing portion 20d.

Therefore, as in the present embodiment, the vehicle interior lighting device 18 attached to the door 11 has spotlights outward from the light emitting surfaces (25b to 25e) of the light guide 23 when the light source 22 is turned on. Light containing L2 is emitted to irradiate the interior of the accommodating portion 20d, and light leaked from the accommodating portion 20d and the illumination window 20c illuminates the interior of the door pocket 14, and the light L2 emitted from the light emitting surface 25b is illuminated. The interior of the vehicle interior can be decorated by illuminating the interior of the door pocket 14 and its surroundings through the window 20c and producing the effects of occupant assistance and indirect lighting.

In the vehicle interior lighting device 18 configured as described above, each of the four side surfaces along the light guide direction of the light guide 23 is formed, and predetermined intervals in the circumferential direction (intervals of 90 ° in this embodiment). A plurality of recesses 26 are provided in the light guide direction 24 in a row in the light guide direction 24 at predetermined intervals on each of the light emitting surfaces 25b to 25e provided in order. Therefore, by rotating the light guide 23 in the circumferential direction and selecting any one position of the light emission surfaces 25b to 25e, a single illumination device 18 including the same light guide 23 and the light source 22 can be obtained. For example, the same lighting device can be attached to the left and right doors 11 and used in a forward-facing state or a backward-facing state. In addition to the left and right doors 11, they can be attached and used in a forward-facing, backward-facing state, or the like. As a result, the compatibility of the lighting device 18 can be obtained, and the types of lighting devices prepared in advance can be reduced, so that the number of components to be managed is reduced, thereby enabling cost reduction and providing at low cost. be able to.

Further, the positions of the concave portions 26 formed in a row of the light emitting surfaces 25b to 25e are sequentially shifted by a quarter pitch in the light guide direction 24 for each row (each light emitting surface), and at least facing each other. The recessed portions 26 of the light emitting surfaces are provided at positions that do not overlap in the facing direction. Therefore, the reflection of light by the total reflection cut surface 26a provided on the inner surface of the concave portion 26 can be emitted to the outside with less influence from the concave portion 26 on the side surface (light emitting surface) side. If a plurality of recesses 26 are provided in the same cross section, the recesses 26 may interfere with each other depending on the thickness of the light guide 23 and may not propagate. These problems are solved by providing the respective positions of the recessed portions 26 that are shifted in the light guide direction 24 in order.

Further, since the interval between the positions of the concave portions 26 forming the row of the concave portions 26 provided on the light emitting surfaces 25b to 25e is narrowed in order as the light guide direction 24 proceeds, the dense portions are formed. Normally, light is attenuated and the irradiation amount is reduced as it proceeds from the light incident surface 25a in the light guide direction 24. In this embodiment, the spot light irradiation by the total reflection cut surface 26a becomes dense as it proceeds in the light guide direction 24. Therefore, the amount of light irradiated on the irradiation surface 27 is increased and averaged by the dense irradiation. Thereby, the wide range on the irradiation surface 27 can be irradiated uniformly. The interval between the positions of the recesses 26 forming the row is changed to be narrowed in order as the light guide direction 24 is advanced, and the diameter or depth of the recesses 26, that is, the area of the recesses 26 (this area is the total reflection). The area of the cut may be changed.

In the above-described embodiment, the light guide 23 has been described as a case where the shape of the light guide 23 is formed in a square bar shape in which the cross section is perpendicular to the light guide direction 24. Alternatively, a prismatic shape such as a pentagon may be used so that each side surface has the light exit surface. Further, as shown in FIG. 7, the cross-sectional shape perpendicular to the light guide direction 24 may be formed in a circular rod shape. In this case, the circumferential surface of the light guide 23 is equally divided in the circumferential direction (four divisions in this example) to form four side surfaces along the light guide direction 24, and the four side surfaces are light emission surfaces 25b to 25e. The light emitting surfaces 25b to 25e may be provided with a plurality of concave portions 26 and total reflection cut surfaces 26a in the same manner as the light emitting surfaces 25b to 25e shown in FIGS. Thus, even as the rod-shaped light guide 23 having a circular cross section, when the light guide 23 is rotated in the circumferential direction, any one position of the light emitting surfaces 25b to 25e can be selected. By the switching, for example, it can be used as a forward-facing state or a backward-facing state, and the same lighting device can be commonly attached to the left and right doors 11 or the like.

8 and 9 are views showing an embodiment of a center console employing the vehicle room lighting device of the present invention, FIG. 8 is a perspective view showing a schematic arrangement configuration in the vehicle room, and FIG. 9 is a CC view of FIG. It is a line expanded sectional view. In addition, since the structure of the illuminating device 18 of this embodiment is the same as the structure of the illuminating device 18 of embodiment shown in FIG. 1 thru | or FIG. 7, the same component is attached | subjected the same code | symbol and duplication description is abbreviate | omitted. .

8 and 9, a passenger seat 32, a passenger seat 33, an instrument panel 34, a center console 35, a shift lever mechanism 36, a parking brake mechanism 37 as an operation means, and the like are disposed in the passenger compartment 31. ing.

The center console 35 is a center console main body 38 (hereinafter referred to as an “interior material main body 38”) as an inner material main body that is resin-molded to a length reaching from the instrument panel 34 to the front of the rear seat (not shown). Is provided.

Further, a container case 39 and a cup holder recess 40 are formed on the upper surface of the front portion of the interior material body 38, and a shift lever opening 41 through which the shift lever mechanism 36 passes through the center of the center console body 38 is connected to the recess 40. A brake lever insertion portion 42 that is opened and is connected to the rear of the shift lever opening portion 41 to pass the parking brake mechanism 37 is opened.

Further, lighting devices that illuminate the feet of the driver seat 32 and the passenger seat 33 in the passenger compartment 31 are provided on both sides in the vehicle width direction of the interior material body 38 (the side portion on the driver seat 32 side and the side portion on the passenger seat 33 side). 18 is provided. In FIG. 8, the lighting device 18 that illuminates the feet on the passenger seat 33 side is shown, and the lighting device 18 that illuminates the feet on the driver seat 32 side is not shown.

As shown in FIG. 9, the lighting device 18 faces the inside of the passenger compartment 31 and is arranged in a united state inside an interior material body 38 attached on the floor.

On the side surface of the interior material body 38, an illumination window 43 penetrating the front and back faces the floor surface corresponding to the portion where the lighting device 18 is disposed, and is formed in the front-rear direction of the vehicle. A housing portion 44 for housing and arranging the lighting device 18 is provided in communication with the lighting window 43 immediately behind the lighting window 43. Then, the unitized lighting device 18 is mounted in the housing portion 44 so that the light guide 23 is placed along the illumination window 43 and the light guide 23 is not seen from the vehicle interior side. It has been.

Then, as shown in FIG. 9, on the back side of the interior material main body 38, any one of the light emission surfaces (25b to 25e) (light emission surface 25d in the present embodiment) is used as an illumination window. The light guide 23 is attached to the interior material main body 38 together with the light source 22 with a gap between the light guide 23 and the housing portion 44 in the 43 direction, that is, toward the floor surface.

Therefore, as in this embodiment, the illumination device 18 attached to the side surface of the center console 35 emits the spot light L2 to the outside from the light emitting surfaces 25b to 25e of the light guide 23 when the light source 22 is turned on. The contained light is emitted to irradiate the inside of the housing portion 44, and the light leaked from the housing portion 44 and the illumination window 43 illuminates the floor surface. At the same time, the light L2 emitted from the light exit surface 25b can pass through the illumination window 43 to illuminate the floor surface and its surroundings to assist the passenger, or can produce indirect illumination to decorate the interior of the vehicle.

10 and 11 are views showing an embodiment of a vehicle ceiling portion that employs the vehicle interior lighting device of the present invention, and FIG. 10 shows a ceiling interior material that is an interior material body, that is, a roof panel interior material 50 on the back side. Seen from the roof panel side of the car body. And the arrow F in FIG. 10 is the front of the automobile, and the arrow R is the rear of the automobile. In addition, since the structure of the illuminating device of this embodiment is the same as the structure of the illuminating device 18 for vehicle interiors of embodiment shown in FIG. 1 thru | or FIG. 7, the same component part attaches | subjects the same code | symbol and repeats description. Omitted.

More specifically, FIG. 10 schematically shows an arrangement configuration of an interior material body 51 constituting the interior material 50 for a roof panel and the lighting device 18 attached to the interior material body 51.

The interior material body 51 is formed into a predetermined ceiling shape using a shape-retaining base material such as a foamed resin base material, a fiber base material, or a corrugated cardboard base material. Each has a long illumination window 52 extending from the vicinity of the front end to the vicinity of the rear end, and an accommodation portion 53 for accommodating and arranging the illumination device 18 immediately behind the illumination window 52. In each of the housing portions 53, the unitized lighting device 18 illuminates the light guide 23 along the illumination window 52 so that the light guide 23 cannot be seen from the vehicle interior side. The window 52 is attached over substantially the entire length.

Then, as shown in FIG. 10, on the back surface side of the interior material main body 51, any one of the light emitting surfaces (25b to 25e) in the accommodating portion 53 (in this example, the light emitting surface). The light guide 23 is attached to the interior material main body 51 together with the light source 22 with a gap between the light guide 23 and the housing portion 53 so that the light guide 23 is directed inward in the illumination window 52, that is, toward the vehicle interior side.

Therefore, as in the present embodiment, when the light source 22 is turned on, the lighting device 18 attached to the roof panel interior material 50 emits the spot light L2 outward from the light emitting surfaces 25b to 25e of the light guide 23. Is emitted to illuminate the interior of the housing portion 44, and the light leaked from the housing portion 44 and the illumination window 43 illuminates the roof panel surface facing the vehicle interior. At the same time, the light L2 emitted from the light emission surface 25b passes through the illumination window 43 and indirect illumination is performed to illuminate the roof panel and its surroundings, so that the passenger's assistance and the interior of the vehicle can be decorated.

It should be noted that the present invention is not limited to the above-described embodiment, but includes modifications and improvements as long as the object of the present invention can be achieved.

DESCRIPTION OF SYMBOLS 11 ... Vehicle door, 12 ... Door panel, 13 ... Interior material body (door trim), 14 ... Door pocket, 14a ... Pocket opening, 15 ... Switch panel, 16 ... Operation member, 17 ... Armrest, 18 ... Vehicle interior lighting 19: Pocket front cover, 19a: Front wall surface, 20 ... Pocket back cover, 20a ... Rear side wall surface, 20b ... Inside bottom surface, 20c ... Lighting window, 20d ... Housing, 21 ... Insole, 22 ... Light source, 23 ... light guide, 24 ... arrow (light guide direction), 25a ... end face (light incident surface), 25b ... light exit surface, 26 ... concave, 26a ... total reflection cut surface, 27 ... irradiated surface, 30 ... Spot irradiation range, 31 ... cab, 32 ... driver seat, 33 ... passenger seat, 34 ... instrument panel, 35 ... center console, 36 ... shift lever mechanism, 37 ... parking Rake mechanism, 38 ... interior material body, 39 ... container, 40 ... recess, 41 ... shift lever opening, 42 ... brake lever insertion part, 43 ... lighting window, 44 ... housing part, 50 ... interior material for roof panel 51 ... Interior material body, 52 ... Lighting window, 53 ... Housing, P ... Pitch, L1 ... Light, L2 ... Light

Claims

An interior material body that is installed facing the interior of the vehicle with an illumination window;
A light source;
A light guide formed in a rod shape having a square or circular cross section, and is provided in order with a light incident surface formed on one end face facing the light source and a predetermined interval in the circumferential direction. And a plurality of light exit surfaces having side surfaces along the light guide surface, and a plurality of light exit surfaces at predetermined intervals for each light exit surface. The light guide body, which is sequentially displaced in the light guide direction and has a recess having a total reflection cut surface on each inner surface, and is arranged so as to correspond to the illumination window of the interior material body When,
A vehicle interior lighting device comprising:
Each recess formed on one light exit surface of the plurality of light exit surfaces is provided at a position that does not overlap with at least each recess formed on another light exit surface facing each other. The illumination device for vehicle interior according to claim 1, wherein
3. The vehicle interior lighting device according to claim 1, wherein the recesses are provided with an interval that becomes narrower in order as the light guide direction proceeds.
The vehicle interior lighting device according to any one of claims 1 to 3, wherein each of the recesses is provided in a conical shape from the outside to the inside of the light guide.
5. The vehicle interior lighting device according to claim 4, wherein each of the recesses is formed to increase in size as the light guide direction proceeds.