WO2019043816A1 - Vehicle cabin lighting device - Google Patents

Vehicle cabin lighting device Download PDF

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Publication number
WO2019043816A1
WO2019043816A1 PCT/JP2017/031070 JP2017031070W WO2019043816A1 WO 2019043816 A1 WO2019043816 A1 WO 2019043816A1 JP 2017031070 W JP2017031070 W JP 2017031070W WO 2019043816 A1 WO2019043816 A1 WO 2019043816A1
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WO
WIPO (PCT)
Prior art keywords
light
lens
lighting device
vehicle
groove
Prior art date
Application number
PCT/JP2017/031070
Other languages
French (fr)
Japanese (ja)
Inventor
鈴木　和俊
文秋 相良
Original Assignee
河西工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 河西工業株式会社 filed Critical 河西工業株式会社
Priority to PCT/JP2017/031070 priority Critical patent/WO2019043816A1/en
Publication of WO2019043816A1 publication Critical patent/WO2019043816A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/20—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for lighting specific fittings of passenger or driving compartments; mounted on specific fittings of passenger or driving compartments
    • B60Q3/217—Doors, e.g. door sills; Steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/60—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects
    • B60Q3/62—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides
    • B60Q3/64—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides for a single lighting device

Definitions

  • the present invention relates to a vehicle interior lighting device.
  • Patent Document 1 discloses a vehicle interior material having a lighting function.
  • a lighting member is disposed at a joint between the door lining main body and the switch panel.
  • the illumination member mainly includes a light source for illuminating the passenger compartment, a light guide for guiding the light from the light source, and a lens for transmitting the light from the light guide.
  • the lens is sandwiched between the joint portion of the door lining main body and the switch panel, and the light emitting portion is disposed substantially flush with the upper surface portion of the switch panel.
  • a light guide is arranged below the light projection part.
  • a method may be adopted in which a surface treatment for diffusing light is applied to the light incident surface of the lens, or a light diffusion sheet is interposed between the light source and the light incident surface. According to this method, since the diffused light is emitted into the vehicle compartment, the light distribution is equalized. Therefore, since unevenness and roughness of light are reduced, it is possible to perform illumination with a small change in appearance and good appearance.
  • the surface treatment to the design surface of the lens may affect the designability at the time of non-illumination, and since it tends to be avoided, the surface treatment is applied to the light incident surface There is a limit to the improvement of the light performance by itself.
  • position control of the light diffusion sheet is difficult. For this reason, there is a disadvantage that the light diffusion sheet is displaced from a desired position by vibration or the like, and light which does not pass through the light diffusion sheet is generated.
  • the present invention has been made in view of such circumstances, and it is an object of the present invention to provide a vehicle interior lighting device that has a small change in appearance and looks good.
  • the present invention provides a vehicle interior illumination device provided in an interior part mounted in a vehicle interior and emitting illumination light to the vehicle interior side.
  • the vehicle interior illumination device includes a light source unit that emits light, and a lens that is sandwiched by gaps provided in the interior parts and emits light from the light source unit toward the vehicle interior.
  • the lens includes a light incident surface on which light from the light source unit is incident, a light emitting surface for emitting light incident from the light incident surface toward the vehicle interior, and a light incident surface and a light emitting surface.
  • the groove portion is provided with a concavo-convex portion formed in a concavo-convex shape in one or both of a pair of surface portions constituting a concave space as a light diffusion portion.
  • the groove portion be provided as a light diffusion portion, which is a sheet-like member which is inserted into the concave space and which diffuses light.
  • the groove is preferably a hole which is perforated along the light incident surface and the light emitting surface.
  • the lens has a structure in which a first lens member provided with a light incident surface and a second lens member provided with a light emitting surface are integrally joined, and the groove portion is formed with the first lens member. It is preferable to be configured to face the second lens member with a gap.
  • the lens be held at the boundary between the first interior member and the second interior member which are joined together to constitute the interior part.
  • FIG. 1 is a perspective view schematically showing a door trim according to a first embodiment.
  • FIG. 2 is an enlarged front view showing an essential part of the door trim shown in FIG.
  • FIG. 3 is a front view schematically showing the configuration of the vehicle interior lighting device.
  • FIG. 4 is a perspective view schematically showing the state of the AA cross section shown in FIG.
  • FIG. 5 is a cross-sectional view showing the state of the AA cross section shown in FIG.
  • FIG. 6 is an explanatory view showing the function of the second uneven portion provided in the vehicle interior lighting device according to the first embodiment.
  • FIG. 7 is an explanatory view showing a modification of the vehicle interior lighting device according to the first embodiment.
  • FIG. 8 is an explanatory view showing the main part of the vehicle interior lighting device according to the second embodiment.
  • FIG. 9 is an explanatory view showing a modification of the vehicle interior lighting device according to the second embodiment.
  • FIG. 1 is a perspective view schematically showing the door trim 1 according to the present embodiment.
  • FIG. 2 is a front view showing an enlarged main part of the door trim 1 shown in FIG.
  • the door trim 1 is a vehicle interior part that covers a vehicle interior side of a door inner panel that is a vehicle body panel of a car and decorates the vehicle interior.
  • the door trim 1 is mainly composed of a door trim main body 2.
  • a door arm rest 5 is provided at the vertically central position of the door trim main body 2.
  • a door pocket 6 is formed at a lower position than the door arm rest 5, and a speaker grill 7 is formed in front of the door pocket 6.
  • the door trim main body 2 is constituted by upper and lower halves of the door trim upper 3 and the door trim lower 4.
  • the door trim upper 3 is comprised by the 1st upper member 3a and the 2nd upper member 3b provided in the center position of the 1st upper member 3a.
  • the second upper member 3b is a horizontally long rectangular shape extending in the longitudinal direction of the vehicle, and has a shape in which the width in the vertical direction is reduced toward the rear side of the vehicle.
  • a space portion surrounded by the inner peripheral edge portion 3a1 is formed at a required position of the first upper member 3a.
  • the second upper member 3b is accommodated in the space of the first upper member 3a, and the outer peripheral edge 3b1 of the second upper member 3b is joined to the inner peripheral edge 3a1 of the first upper member 3a.
  • the door trim main body 2 is formed by molding using an appropriate synthetic resin material. Moreover, in the required part of the door trim main body 2 (for example, the 1st upper member 3a of the door trim upper 3 and the door trim lower 4), the skin material provided with designability and cushioning properties is stuck on the surface of the core material made of resin. It is assumed that Further, although the door trim main body 2 is configured to be divided into upper and lower halves, it may be configured to be divided into upper and lower three halves, such as a door trim upper, a door trim center, and a door trim lower.
  • the vehicle interior lighting device 10 (hereinafter simply referred to as the “lighting device 10”) according to the present embodiment is a device that decorates the door trim 1 by emitting illumination light to the vehicle interior side.
  • the lighting device 10 is disposed in a gap provided in the door trim 1.
  • the lighting device 10 is disposed at the upper boundary portion BP of the first upper member 3 a and the second upper member 3 b which are joined to each other to constitute the door trim upper 3.
  • FIG. 3 is a front view schematically showing the configuration of the lighting device 10 applied to the door trim 1.
  • FIG. 4 is a perspective view schematically showing the state of the AA cross section shown in FIG.
  • FIG. 5 is a cross-sectional view showing the state of the AA cross section shown in FIG.
  • the illumination device 10 mainly includes a light source unit 20 and a lens 30. 4 and 5, “3a2" indicates the core material of the first upper member 3a, and “3a3" indicates the surface material of the first upper member 3a.
  • the light source unit 20 emits light to the lens 30.
  • the light source unit 20 is configured of a light source unit 21 and a light guide bar 25.
  • the light source unit 21 includes one or more light sources.
  • an LED can be used as a light source.
  • the light source unit 21 is disposed on the end face 25 a in the longitudinal direction of the light guide rod 25 and allows light to be incident on the end face 25 a.
  • the light source unit 21 is provided on one end face 25a of the light guide rod 25, but may be provided on both end faces 25a.
  • the number of light source units 21 to be installed can be determined according to the amount of light required for the lighting device 10.
  • the light guide rod 25 is a rod-like light guide that propagates the light from the light source unit 21 incident on the end face 25 a in the length direction.
  • the light guide rod 25 is formed of an optical resin such as acrylic, and has a rod shape whose cross section is a prism.
  • the light guide rod 25 may be in the shape of a rod other than a prism (for example, a cylinder).
  • the light guide bar 25 extends along the lens 30 and is provided over the entire area of the lens 30.
  • the light guide rod 25 is disposed in a holder 35 provided on the lens 30.
  • a pin (not shown) is provided upright on the light guide bar 25, and the pin is inserted into a pin hole (not shown) of the holding portion 35 to position the light guide bar 25 and the lens 30. And fixation is performed. Transmission of light by the light guide rod 25 extends over the entire area in the longitudinal direction.
  • a light deflection portion 26 is provided on a predetermined side wall surface 25 b among a plurality of side wall surfaces continuously provided in the circumferential direction.
  • the light deflection unit 26 has a function of emitting light from the side wall surface 25c facing the lens 30 (specifically, the light incident surface 31a) by deflecting a part of the light propagated inside the light guide rod 25. Is responsible for The side wall surface 25 b and the side wall surface 25 c are in a mutually facing relationship.
  • the light deflection unit 26 is configured, for example, by forming the surface of the side wall surface 25 b in an uneven shape.
  • the formation of the concavo-convex shape includes, for example, a method of treating the surface of the side wall surface 25b by blasting, or a method of transferring with a mold at the time of molding of the light guide rod 25 by molding.
  • the formation of the concavo-convex shape is not limited to these methods as long as the light deflection unit 26 has a function.
  • the light deflection unit 26 may be realized by a method other than the concavo-convex shape as long as the function can be realized.
  • the lens 30 emits the light emitted from the light source unit 20, specifically, the light guide rod 25 toward the vehicle interior.
  • the lens 30 is held in a gap provided in the door trim 1. Specifically, the lens 30 is held by the upper boundary portion BP (gap) of the first upper member 3a and the second upper member 3b.
  • the lens 30 has a laterally elongated shape extending along the upper boundary BP.
  • the lens 30 is made of, for example, an optical resin such as acrylic.
  • the lens 30 is composed of a lens body 31, a holder 35, and an assembly piece 36.
  • the lens body 31 has a light incident surface 31a on which the light from the light guide rod 25 is incident, and a light emission surface 31b for emitting the light incident from the light incident surface 31a toward the vehicle interior.
  • the light incident surface 31a is provided with a first uneven portion 31a1 formed in an uneven shape.
  • the first uneven portion 31a1 having the uneven shape functions as a first light diffusion portion for diffusing light.
  • a method of transferring with a mold when molding the lens 30 by molding can be used.
  • the method for forming the first light diffusion portion is not limited.
  • a method other than the first uneven portion 31a1 may be used.
  • the lens body 31 has a groove 32 which forms a concave space between the light incident surface 31a and the light emission surface 31b.
  • the groove 32 is formed, for example, by drilling a hole in the lens body 31 in a bottomed concave shape.
  • the groove portion 32 extends along the surface direction of the light incident surface 31a and the light emission surface 31b, and includes a pair of surface portions 33a and 34a facing each other with a concave space therebetween.
  • Each of a pair of surface parts 33a and 34a which make the groove part 32 is provided with 2nd uneven part 33a1, 34a1 formed in uneven
  • the second uneven portions 33a1 and 34a1 having the uneven shape function as a second light diffusion portion for diffusing light.
  • the second uneven portions 33a1 and 34a1 can be formed, for example, by a method of transferring with a mold when molding the lens 30 by molding. However, as long as it has a function as a 2nd light-diffusion part, the formation method will not be limited. In addition, as long as the function of the second light diffusion portion can be realized, a method other than the second uneven portions 33a1 and 34a1 may be used.
  • the holding unit 35 has a function of holding the light guide rod 25.
  • the holding portion 35 is composed of a vertical wall 35 a facing the light incident surface 31 a of the lens body 31 at a predetermined distance and a lower wall 35 b connecting the vertical wall 35 a and the lens body 31. From the vertical wall 35 a, the lower wall 35 b and the light incident surface 31 a of the lens body 31, a concave housing groove for holding the light guide rod 25 is formed. Pin holes are formed at required positions in the lower wall 35 b, and the light guide rods 25 are held in a positioned state in the lens body 31 by inserting the pins of the light guide rods 25 into the pin holes.
  • the side wall surface 25 c of the light guide rod 25 faces the light incident surface 31 a of the lens body 31 in the state of being held by the holding unit 35.
  • the assembly piece 36 is a member for assembling and fixing the lens 30 to the second upper member 3b.
  • the mounting piece 36 is provided in a required range of the holding portion 35 and extends from the holding portion 35.
  • the nonwoven fabric 40 is provided between the lens 30 of the illuminating device 10 and the first upper member 3a.
  • Drawing 6 is an explanatory view showing the function of the 2nd concavo-convex part 33a1 and 34a1 with which lighting installation 10 concerning this embodiment is provided.
  • the operation of the lighting device 10 according to the present embodiment will be described.
  • light emitted from the light source unit 21 enters the inside from the end face 25 a of the light guide bar 25.
  • the light incident on the inside of the light guide bar 25 is propagated inside the light guide bar 25 while repeating internal reflection.
  • a part of the light propagated inside the light guide rod 25 is deflected when being reflected by the side wall surface 25 b (light deflection unit 26) and emitted from the side wall surface 25 c.
  • the light emitted from the side wall surface 25 c of the light guide rod 25 is incident on the light incident surface 31 a of the lens body 31.
  • the light incident on the light incident surface 31 a is diffused in the first uneven portion 31 a 1, passes through the inside of the lens body 31, and is emitted from one surface 33 a of the groove 32.
  • the light emitted from the one surface portion 33a is diffused in the second uneven portion 33a1.
  • the light emitted from one of the surface portions 33 a passes through the space of the groove 32, and enters the inside of the lens main body 31 again from the other surface portion 34 a.
  • the light incident on the other surface portion 34 a is diffused in the second uneven portion 34 a 1 and then passes through the inside of the lens body 31.
  • the light having passed through the inside of the lens body 31 is emitted from the light emission surface 31 b of the lens body 31.
  • the lens 30 included in the illumination device 10 emits light from the light source unit 20 to the light incident surface 31a and the light emitted from the light incident surface 31a toward the vehicle interior. It has a surface 31 b and a groove 32 which is provided between the light incident surface 31 a and the light emission surface 31 b and which forms a concave space.
  • the groove portion 32 includes a light diffusion portion that diffuses light.
  • the groove portion 32 includes, as a light diffusion portion (second light diffusion portion), second concavo-convex portions 33a1 and 34a1 formed in a concavo-convex shape on a pair of surface portions 33a and 34a constituting a concave space. .
  • the lens 30 is provided with the groove portion 32, the second uneven portions 33a1 and 34a1 can be set on the pair of surface portions 33a and 34a forming the groove portion 32.
  • the function of diffusing light can be provided on the optical path from the light incident surface 31a to the light emitting surface 31b. Therefore, the ability to diffuse light is dramatically improved as compared to the case where light is diffused only by the light incident surface 31 a (first light diffusion portion).
  • unevenness and roughness of light can be suppressed, it is possible to provide the lighting device 10 that has a small change in appearance and looks good.
  • the groove part 32 provided with a 2nd light-diffusion part exists in the position away from the light source part 20 rather than the light-incidence surface 31a provided with a 1st light-diffusion part.
  • the light diffusion effect is larger as the distance from the light source unit 20 is increased, high diffusion efficiency can be obtained by using the light diffusion function of the groove 32. Thereby, unevenness and roughness of light can be effectively suppressed.
  • the light emission surface 31b of the lens 30 is a design surface facing the vehicle interior, it tends not to be preferable to provide the design surface with the concavo-convex portion formed in a concavo-convex shape.
  • this method including the groove portion 32 the ability to diffuse light can be increased without providing the uneven portion on the design surface. Thereby, it is possible to suppress unevenness and roughness of light at the time of illumination of the illumination device 10 while suppressing a decrease in design of the lens 30 at the time of non-illumination of the illumination device 10.
  • the second concavo-convex parts 33a1 and 34a1 are set on both of the pair of surface parts 33a and 34a forming the groove part 32, but the second concavo-convex parts 33a1 and 34a1 are provided on only one of the surface parts 33a and 34a. It may be set.
  • FIG. 7 is an explanatory view showing a modified example of the illumination device 10 according to the first embodiment.
  • the second light diffusion portion is constituted by the second uneven portions 33a1 and 34a1 provided on the pair of surface portions 33a and 34a forming the groove 32 (concave space).
  • a light diffusion sheet 37 which is a sheet-like member for diffusing light, may be inserted into the groove 32, and the light diffusion sheet 37 may be used as a second light diffusion part. .
  • the ability to diffuse light by the light diffusion sheet 37 is dramatically improved, as in the case of the above-described second uneven portions 33a1 and 34a1. In this way, it is possible to make a fine response to the optical performance. As a result, since unevenness and roughness of light can be suppressed, it is possible to provide the lighting device 10 that has a small change in appearance and looks good.
  • the light diffusion sheet 37 since the light diffusion sheet 37 is inserted into the groove 32, the light diffusion sheet 37 can be positioned and fixed by the groove 32. As a result, it is possible to suppress the inconvenience that the position of the light diffusion sheet 37 is shifted, or light which is not transmitted through the light diffusion sheet is generated due to the position shift.
  • the method of using the second uneven portions 33a1 and 34a1 having the concavo-convex shape and the light diffusion sheet 37 independently has been described, but these methods may be used in combination It may be
  • FIG. 8 is an explanatory view showing the main part of the illumination device 10 according to the second embodiment.
  • the lens body 31 has a structure in which two divided lens members 38 and 39 are integrally joined.
  • One lens member 38 is provided with a light incident surface 31 a and a surface portion 38 a facing the light incident surface 31 a.
  • the other lens member 39 includes a light emitting surface 31 b and a surface portion 39 a facing the light emitting surface 31 b.
  • the groove 32 is configured by facing a pair of lens members 38 and 39 with a gap therebetween.
  • the pair of lens members 38 and 39 has a shape in which one surface 38a and the other surface 39a face each other.
  • the groove part 32 is comprised by the clearance gap between one surface part 38a and the other surface part 39a.
  • a second uneven portion 38a1 functioning as a second light diffusion portion is provided on the surface portion 38a of one of the lens members 38. Similarly, on the surface 39a of the other lens member 39, a second uneven portion 39a1 functioning as a second light diffusion portion is provided.
  • the lens 30 is provided with the groove 32 similarly to the method described in the first embodiment, the second uneven portions 38a1 and 39a1 are set in the pair of surface portions 38a and 39a forming the groove 32. can do.
  • the function of diffusing light can be provided on the optical path from the light incident surface 31a to the light emitting surface 31b. Therefore, the ability to diffuse light is dramatically improved as compared to the case where light is diffused only by the light incident surface 31 a (first light diffusion portion).
  • unevenness and roughness of light can be suppressed, it is possible to provide the lighting device 10 that has a small change in appearance and looks good.
  • the lens body 31 is composed of two lens members 38 and 39. For this reason, the adjustment range of the light performance is increased by making the color tone and / or the transmittance of the two lens members 38 and 39 different. Thereby, desired illumination can be appropriately performed.
  • FIG. 9 is an explanatory view showing a modified example of the illumination device 10 according to the second embodiment.
  • the second light diffusion portion is constituted by the second concavo-convex portions 38a1 and 39a1 of the concavo-convex shape formed on the pair of surface portions 38a and 39a forming the groove 32 (concave space).
  • a light diffusion sheet 37 which is a sheet-like member for diffusing light, may be inserted into the groove 32, and this light diffusion sheet 37 may be used as a second light diffusion part. .
  • the light diffusion sheet 37 since the light diffusion sheet 37 is inserted into the groove 32, the light diffusion sheet 37 can be positioned and fixed by the groove 32.
  • light sources such as LEDs may be arranged on the lens at a predetermined pitch.
  • the illumination device is disposed at the boundary between the two interior members.
  • the illumination device may be disposed in a gap formed in an integral interior part.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)

Abstract

Provided is a vehicle cabin lighting device which controls against uneven and patchy illumination, does not undergo significant change in appearance, and is visually appealing. This vehicle cabin lighting device (10) comprises a light source section (20) for emitting light and a lens (30) that is held in a gap formed in a door trim (1) and directs the light from the light source section (20) toward the vehicle cabin. The lens (30) has: a light incident surface (31a) whereon light from the light source section (10) is incident; a light output surface (31b) wherefrom the light incident on the light incident surface (31a) is directed toward the vehicle cabin; and a groove section (32) which is disposed between the light incident surface (31a) and the light output surface (31b) and forms a recessed space. The groove section (32) is provided with a light diffusion section for diffusing light.

Description

車両室内用照明装置Vehicle interior lighting device
　本発明は、車両室内用照明装置に関する。 The present invention relates to a vehicle interior lighting device.
　従来より、車両室内を優美に装うために、様々な装飾や機能を備えた内装部品が知られている。また、より高い装飾効果を得るために、照明を用いて上質な内装を演出する内装部品も知られている。 DESCRIPTION OF RELATED ART Conventionally, in order to dress a vehicle interior gracefully, interior parts provided with various decorations and functions are known. Also known are interior parts that use lighting to create a high quality interior in order to obtain higher decorative effects.
　例えば特許文献１には、照明機能を備えた車両用内装材が開示されている。この車両用内装材において、ドアライニング本体とスイッチパネルとの接合部には、照明部材が配設されている。照明部材は、車室を照明する光源と、光源からの光を誘導する導光体と、導光体からの光を透過するレンズと、を主体に構成されている。レンズは、ドアライニング本体とスイッチパネルとの接合部に挟持され、スイッチパネルの上面部とほぼ面一に投光部が配置されている。そして、投光部よりも下方に導光体が配置されている。 For example, Patent Document 1 discloses a vehicle interior material having a lighting function. In the interior material for a vehicle, a lighting member is disposed at a joint between the door lining main body and the switch panel. The illumination member mainly includes a light source for illuminating the passenger compartment, a light guide for guiding the light from the light source, and a lens for transmitting the light from the light guide. The lens is sandwiched between the joint portion of the door lining main body and the switch panel, and the light emitting portion is disposed substantially flush with the upper surface portion of the switch panel. And a light guide is arranged below the light projection part.
特開２０１５－１５５２９８号公報JP, 2015-155298, A
　しかしながら、従来の照明装置においては、レンズから出射される光が指向性を有するため、視認する角度によっては光のむらや粗さが目立ってしまい、外観の変化が大きいという不都合がある。 However, in the conventional lighting device, since the light emitted from the lens has directivity, the unevenness and roughness of the light are noticeable depending on the angle to be recognized, and there is a disadvantage that the change in appearance is large.
　このため、光を拡散するための表面処理をレンズの光入射面に施したり、光源と光入射面との間に光拡散シートを介在させたりする方法が採られることがある。この方法によれば、拡散された光が車両室内に出射されるので、光の分布が均等化される。そのため、光のむらや粗さが軽減されるので、外観の変化が小さく見栄えのする照明を行うことができる。 For this reason, a method may be adopted in which a surface treatment for diffusing light is applied to the light incident surface of the lens, or a light diffusion sheet is interposed between the light source and the light incident surface. According to this method, since the diffused light is emitted into the vehicle compartment, the light distribution is equalized. Therefore, since unevenness and roughness of light are reduced, it is possible to perform illumination with a small change in appearance and good appearance.
　一方で、レンズの意匠面（車両室内側に臨む面）への表面処理は非照明時における意匠性に影響を与える虞があり、避けられる傾向にあることから、光入射面に表面処理を行うのみでは光性能の改善に限度がある。また、光拡散シートを用いる方法にあっては、光拡散シートの位置規制が難しい。このため、振動などにより光拡散シートが所望の位置からずれ、光拡散シートを透過しない光が発生するという不都合がある。 On the other hand, the surface treatment to the design surface of the lens (the surface facing the vehicle interior) may affect the designability at the time of non-illumination, and since it tends to be avoided, the surface treatment is applied to the light incident surface There is a limit to the improvement of the light performance by itself. Moreover, in the method of using a light diffusion sheet, position control of the light diffusion sheet is difficult. For this reason, there is a disadvantage that the light diffusion sheet is displaced from a desired position by vibration or the like, and light which does not pass through the light diffusion sheet is generated.
　本発明はかかる事情に鑑みてなされたものであり、その目的は、外観における変化が小さく見栄えのする車両室内用照明装置を提供することである。 The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a vehicle interior lighting device that has a small change in appearance and looks good.
　かかる課題を解決するために、本発明は、車両室内に装着される内装部品に設けられて車両室内側へと照明光を出射する車両室内用照明装置を提供する。この車両室内用照明装置は、光を出射する光源部と、内装部品に設けられた隙間に挟持され、光源部からの光を車両室内に向けて出射するレンズと、を有している。ここで、レンズは、光源部からの光が入射する光入射面と、光入射面から入射した光を車両室内に向けて出射する光出射面と、光入射面と光出射面との間に設けられ、凹状の空間を形成する溝部と、を有し、溝部は、光を拡散する光拡散部を備えている。 In order to solve such problems, the present invention provides a vehicle interior illumination device provided in an interior part mounted in a vehicle interior and emitting illumination light to the vehicle interior side. The vehicle interior illumination device includes a light source unit that emits light, and a lens that is sandwiched by gaps provided in the interior parts and emits light from the light source unit toward the vehicle interior. Here, the lens includes a light incident surface on which light from the light source unit is incident, a light emitting surface for emitting light incident from the light incident surface toward the vehicle interior, and a light incident surface and a light emitting surface. And a groove which is provided to form a concave space, and the groove includes a light diffusion portion which diffuses light.
　ここで、本発明において、溝部は、凹状の空間を構成する一対の面部の一方又は双方に凹凸形状に形成された凹凸部を光拡散部として備えることが好ましい。 Here, in the present invention, it is preferable that the groove portion is provided with a concavo-convex portion formed in a concavo-convex shape in one or both of a pair of surface portions constituting a concave space as a light diffusion portion.
　また、本発明において、溝部は、凹状の空間に挿入され、光を拡散するシート状の部材である光拡散シートを光拡散部として備えることが好ましい。 Further, in the present invention, it is preferable that the groove portion be provided as a light diffusion portion, which is a sheet-like member which is inserted into the concave space and which diffuses light.
　また、本発明において、溝部は、光入射面及び光出射面の面方向に沿って穿孔されている穴部であることが好ましい。 Further, in the present invention, the groove is preferably a hole which is perforated along the light incident surface and the light emitting surface.
　また、本発明において、レンズは、光入射面が設けられた第１レンズ部材と光出射面が設けられた第２レンズ部材とを一体に接合した構造であり、溝部は、第１レンズ部材と第２レンズ部材とを隙間を隔てて対向させることで構成されることが好ましい。 Further, in the present invention, the lens has a structure in which a first lens member provided with a light incident surface and a second lens member provided with a light emitting surface are integrally joined, and the groove portion is formed with the first lens member. It is preferable to be configured to face the second lens member with a gap.
　また、本発明において、レンズは、互いに接合されて内装部品を構成する第１内装部材と第２内装部材との境界部に挟持されることが好ましい。 Further, in the present invention, it is preferable that the lens be held at the boundary between the first interior member and the second interior member which are joined together to constitute the interior part.
　本発明によれば、光のむらや粗さを抑制することができるので、外観における変化が小さく見栄えのする車両室内用照明装置を提供することができる。 According to the present invention, since unevenness and roughness of light can be suppressed, it is possible to provide a lighting device for a vehicle interior which has a small change in appearance and looks good.
図１は、第１の実施形態に係るドアトリムを模式的に示す斜視図である。FIG. 1 is a perspective view schematically showing a door trim according to a first embodiment. 図２は、図１に示すドアトリムの要部を拡大して示す正面図である。FIG. 2 is an enlarged front view showing an essential part of the door trim shown in FIG. 図３は、車両室内用照明装置の構成を模式的に示す正面図である。FIG. 3 is a front view schematically showing the configuration of the vehicle interior lighting device. 図４は、図２に示すＡＡ断面の状態を模式的に示す斜視図である。FIG. 4 is a perspective view schematically showing the state of the AA cross section shown in FIG. 図５は、図２に示すＡＡ断面の状態を示す断面図である。FIG. 5 is a cross-sectional view showing the state of the AA cross section shown in FIG. 図６は、第１の実施形態に係る車両室内用照明装置が備える第２凹凸部の機能を示す説明図である。FIG. 6 is an explanatory view showing the function of the second uneven portion provided in the vehicle interior lighting device according to the first embodiment. 図７は、第１の実施形態に係る車両室内用照明装置の変形例を示す説明図である。FIG. 7 is an explanatory view showing a modification of the vehicle interior lighting device according to the first embodiment. 図８は、第２の実施形態に係る車両室内用照明装置の要部を示す説明図である。FIG. 8 is an explanatory view showing the main part of the vehicle interior lighting device according to the second embodiment. 図９は、第２の実施形態に係る車両室内用照明装置の変形例を示す説明図である。FIG. 9 is an explanatory view showing a modification of the vehicle interior lighting device according to the second embodiment.
（第１の実施形態）
　以下、本実施形態に係る車両室内用照明装置をドアトリムに適用して説明する。ここで、図１は、本実施形態に係るドアトリム１を模式的に示す斜視図である。図２は、図１に示すドアトリム１の要部を拡大して示す正面図である。 First Embodiment
Hereinafter, the lighting device for the vehicle interior according to the present embodiment will be described by applying to a door trim. Here, FIG. 1 is a perspective view schematically showing the door trim 1 according to the present embodiment. FIG. 2 is a front view showing an enlarged main part of the door trim 1 shown in FIG.
　ドアトリム１は、自動車の車体パネルであるドアインナパネルの車両室内側を覆い、車両室内を装飾する車両用内装部品である。ドアトリム１は、ドアトリム本体２を主体に構成されている。このドアトリム本体２には、その上下方向中央位置に、ドアアームレスト５が設けられている。また、ドアトリム本体２には、ドアアームレスト５よりも下方位置にドアポケット６が形成され、このドアポケット６の前方にスピーカーグリル７が形成されている。 The door trim 1 is a vehicle interior part that covers a vehicle interior side of a door inner panel that is a vehicle body panel of a car and decorates the vehicle interior. The door trim 1 is mainly composed of a door trim main body 2. A door arm rest 5 is provided at the vertically central position of the door trim main body 2. Further, in the door trim main body 2, a door pocket 6 is formed at a lower position than the door arm rest 5, and a speaker grill 7 is formed in front of the door pocket 6.
　本実施形態において、ドアトリム本体２は、ドアトリムアッパー３と、ドアトリムロア４との上下二分割体から構成されている。また、ドアトリムアッパー３は、第１アッパー部材３ａと、第１アッパー部材３ａの中央位置に設けられた第２アッパー部材３ｂとで構成されている。第２アッパー部材３ｂは、車両前後方向に延在する横長矩形で、かつ、車両後側にかけて上下方向の幅が縮小した形状にされている。第１アッパー部材３ａの所要位置には、内周縁部３ａ１によって囲まれた空間部が形成されている。第２アッパー部材３ｂは、第１アッパー部材３ａの空間部に収容され、第２アッパー部材３ｂの外周縁部３ｂ１が第１アッパー部材３ａの内周縁部３ａ１と接合されている。 In the present embodiment, the door trim main body 2 is constituted by upper and lower halves of the door trim upper 3 and the door trim lower 4. Moreover, the door trim upper 3 is comprised by the 1st upper member 3a and the 2nd upper member 3b provided in the center position of the 1st upper member 3a. The second upper member 3b is a horizontally long rectangular shape extending in the longitudinal direction of the vehicle, and has a shape in which the width in the vertical direction is reduced toward the rear side of the vehicle. A space portion surrounded by the inner peripheral edge portion 3a1 is formed at a required position of the first upper member 3a. The second upper member 3b is accommodated in the space of the first upper member 3a, and the outer peripheral edge 3b1 of the second upper member 3b is joined to the inner peripheral edge 3a1 of the first upper member 3a.
　ドアトリム本体２は、適宜の合成樹脂材を用いた型成形によって形成されている。また、ドアトリム本体２の所要の部位においては（例えば、ドアトリムアッパー３の第１アッパー部材３ａ及びドアトリムロア４）、樹脂製の芯材の表面に意匠性及びクッション性を備えた表皮材を貼着した構成とされている。また、ドアトリム本体２は上下二分割構成であるが、ドアトリムアッパー、ドアトリムセンター、ドアトリムロアというように上下三分割構成、あるいは一体構成であってもよい。 The door trim main body 2 is formed by molding using an appropriate synthetic resin material. Moreover, in the required part of the door trim main body 2 (for example, the 1st upper member 3a of the door trim upper 3 and the door trim lower 4), the skin material provided with designability and cushioning properties is stuck on the surface of the core material made of resin. It is assumed that Further, although the door trim main body 2 is configured to be divided into upper and lower halves, it may be configured to be divided into upper and lower three halves, such as a door trim upper, a door trim center, and a door trim lower.
　本実施形態に係る車両室内用照明装置１０（以下単に「照明装置１０」という）は、車両室内側へと照明光を出射することにより、ドアトリム１を装飾する装置である。この照明装置１０は、ドアトリム１に設けられた隙間に配置されている。具体的には、照明装置１０は、互いに接合されてドアトリムアッパー３を構成する第１アッパー部材３ａと第２アッパー部材３ｂとの上側境界部ＢＰに配置されている。照明装置１０の照明光を通じて上側境界部ＢＰを際立たせることで、見栄えのよいドアトリム１を提供することができる。 The vehicle interior lighting device 10 (hereinafter simply referred to as the “lighting device 10”) according to the present embodiment is a device that decorates the door trim 1 by emitting illumination light to the vehicle interior side. The lighting device 10 is disposed in a gap provided in the door trim 1. Specifically, the lighting device 10 is disposed at the upper boundary portion BP of the first upper member 3 a and the second upper member 3 b which are joined to each other to constitute the door trim upper 3. By highlighting the upper boundary BP through the illumination light of the illumination device 10, it is possible to provide the door trim 1 with a good appearance.
　図３は、ドアトリム１に適用される照明装置１０の構成を模式的に示す正面図である。また、図４は、図２に示すＡＡ断面の状態を模式的に示す斜視図である。図５は、図２に示すＡＡ断面の状態を示す断面図である。照明装置１０は、光源部２０と、レンズ３０とを主体に構成されている。なお、図４及び図５において、「３ａ２」は第１アッパー部材３ａの芯材を示し、「３ａ３」は第１アッパー部材３ａの表皮材を示す。 FIG. 3 is a front view schematically showing the configuration of the lighting device 10 applied to the door trim 1. FIG. 4 is a perspective view schematically showing the state of the AA cross section shown in FIG. FIG. 5 is a cross-sectional view showing the state of the AA cross section shown in FIG. The illumination device 10 mainly includes a light source unit 20 and a lens 30. 4 and 5, "3a2" indicates the core material of the first upper member 3a, and "3a3" indicates the surface material of the first upper member 3a.
　光源部２０は、レンズ３０に対して光を出射する。光源部２０は、光源ユニット２１と、導光棒２５とで構成されている。 The light source unit 20 emits light to the lens 30. The light source unit 20 is configured of a light source unit 21 and a light guide bar 25.
　光源ユニット２１は、１又は複数の光源を備えている。光源としては、例えばＬＥＤを用いることができる。光源ユニット２１は、導光棒２５の長さ方向の端面２５ａに配置され、当該端面２５ａに光を入射させる。光源ユニット２１は、導光棒２５の一方の端面２５ａに設けられているが、両方の端面２５ａに設けられるものであってもよい。設置する光源ユニット２１の数は、照明装置１０に求められる光量に応じて決定することができる。 The light source unit 21 includes one or more light sources. For example, an LED can be used as a light source. The light source unit 21 is disposed on the end face 25 a in the longitudinal direction of the light guide rod 25 and allows light to be incident on the end face 25 a. The light source unit 21 is provided on one end face 25a of the light guide rod 25, but may be provided on both end faces 25a. The number of light source units 21 to be installed can be determined according to the amount of light required for the lighting device 10.
　導光棒２５は、長さ方向の端面２５ａに入射された光源ユニット２１からの光を内部において伝搬させる棒状の導光体である。導光棒２５は、アクリルなどの光学樹脂から成形されており、その断面が角柱となる棒形状とされている。ただし、導光棒２５は、角柱以外の棒形状（例えば円柱）であってもよい。 The light guide rod 25 is a rod-like light guide that propagates the light from the light source unit 21 incident on the end face 25 a in the length direction. The light guide rod 25 is formed of an optical resin such as acrylic, and has a rod shape whose cross section is a prism. However, the light guide rod 25 may be in the shape of a rod other than a prism (for example, a cylinder).
　導光棒２５は、レンズ３０に沿って延在しており、当該レンズ３０の全域にわたって設けられている。導光棒２５は、レンズ３０に設けられた保持部３５に配設されている。導光棒２５には、ピン（図示せず）が立設されており、当該ピンを保持部３５のピン穴（図示せず）に挿入することにより、導光棒２５とレンズ３０との位置決め及び固定が行われる。導光棒２５による光の伝達は、長手方向の全域に及んでいる。 The light guide bar 25 extends along the lens 30 and is provided over the entire area of the lens 30. The light guide rod 25 is disposed in a holder 35 provided on the lens 30. A pin (not shown) is provided upright on the light guide bar 25, and the pin is inserted into a pin hole (not shown) of the holding portion 35 to position the light guide bar 25 and the lens 30. And fixation is performed. Transmission of light by the light guide rod 25 extends over the entire area in the longitudinal direction.
　導光棒２５において、周方向に連設された複数の側壁面のうち所定の側壁面２５ｂには、光偏向部２６が設けられている。光偏向部２６は、導光棒２５の内部を伝搬される光の一部を偏向させることにより、レンズ３０（具体的には、光入射面３１ａ）と向かい合う側壁面２５ｃから光を出射させる機能を担っている。側壁面２５ｂと側壁面２５ｃとは、互いに向かい合う関係にある。光偏向部２６は、例えば側壁面２５ｂの表面を凹凸形状に形成することにより構成されている。凹凸形状の形成は、例えばブラスト処理により側壁面２５ｂの表面を処理する方法、又は、型成形による導光棒２５の成形時に金型により転写する方法などが挙げられる。もっとも、光偏向部２６としての機能を備えるのであれば、凹凸形状の形成はこれらの手法に限られない。また、光偏向部２６は、その機能を実現することができるのであれば、凹凸形状以外の手法で実現してもよい。 In the light guide rod 25, a light deflection portion 26 is provided on a predetermined side wall surface 25 b among a plurality of side wall surfaces continuously provided in the circumferential direction. The light deflection unit 26 has a function of emitting light from the side wall surface 25c facing the lens 30 (specifically, the light incident surface 31a) by deflecting a part of the light propagated inside the light guide rod 25. Is responsible for The side wall surface 25 b and the side wall surface 25 c are in a mutually facing relationship. The light deflection unit 26 is configured, for example, by forming the surface of the side wall surface 25 b in an uneven shape. The formation of the concavo-convex shape includes, for example, a method of treating the surface of the side wall surface 25b by blasting, or a method of transferring with a mold at the time of molding of the light guide rod 25 by molding. However, the formation of the concavo-convex shape is not limited to these methods as long as the light deflection unit 26 has a function. In addition, the light deflection unit 26 may be realized by a method other than the concavo-convex shape as long as the function can be realized.
　レンズ３０は、光源部２０、具体的には導光棒２５から出射された光を車両室内に向けて出射する。レンズ３０は、ドアトリム１に設けられた隙間に挟持されている。具体的には、レンズ３０は、第１アッパー部材３ａと第２アッパー部材３ｂとの上側境界部ＢＰ（隙間）に挟持されている。レンズ３０は、この上側境界部ＢＰに沿って延在する横長形状を有している。レンズ３０は、例えばアクリルなどの光学樹脂から成形されている。 The lens 30 emits the light emitted from the light source unit 20, specifically, the light guide rod 25 toward the vehicle interior. The lens 30 is held in a gap provided in the door trim 1. Specifically, the lens 30 is held by the upper boundary portion BP (gap) of the first upper member 3a and the second upper member 3b. The lens 30 has a laterally elongated shape extending along the upper boundary BP. The lens 30 is made of, for example, an optical resin such as acrylic.
　レンズ３０は、レンズ本体３１と、保持部３５と、組み付け片３６とで構成されている。 The lens 30 is composed of a lens body 31, a holder 35, and an assembly piece 36.
　レンズ本体３１は、導光棒２５からの光が入射する光入射面３１ａと、光入射面３１ａから入射した光を車両室内に向けて出射する光出射面３１ｂとを有している。光入射面３１ａには、凹凸形状に形成された第１凹凸部３１ａ１が設けられている。この凹凸形状の第１凹凸部３１ａ１は、光を拡散させるための第１光拡散部として機能する。第１凹凸部３１ａ１の形成は、例えば型成形によるレンズ３０の成形時に金型により転写する方法などを用いることができる。もっとも、第１光拡散部としての機能を備えるものであれば、その形成方法を限定するものではない。また、第１光拡散部の機能を実現することができるものであれば、第１凹凸部３１ａ１以外の手法を用いてもよい。 The lens body 31 has a light incident surface 31a on which the light from the light guide rod 25 is incident, and a light emission surface 31b for emitting the light incident from the light incident surface 31a toward the vehicle interior. The light incident surface 31a is provided with a first uneven portion 31a1 formed in an uneven shape. The first uneven portion 31a1 having the uneven shape functions as a first light diffusion portion for diffusing light. For forming the first uneven portion 31a1, for example, a method of transferring with a mold when molding the lens 30 by molding can be used. However, as long as it has a function as the first light diffusion portion, the method for forming the first light diffusion portion is not limited. Moreover, as long as the function of the first light diffusion portion can be realized, a method other than the first uneven portion 31a1 may be used.
　また、レンズ本体３１は、光入射面３１ａと光出射面３１ｂとの間に、凹状の空間を形成する溝部３２を有している。溝部３２は、例えば、レンズ本体３１に有底凹状に穴部を穿孔することにより形成されている。溝部３２は、光入射面３１ａ及び光出射面３１ｂの面方向に沿って延在しており、凹状の空間を隔てて対向する一対の面部３３ａ，３４ａを備えている。 Further, the lens body 31 has a groove 32 which forms a concave space between the light incident surface 31a and the light emission surface 31b. The groove 32 is formed, for example, by drilling a hole in the lens body 31 in a bottomed concave shape. The groove portion 32 extends along the surface direction of the light incident surface 31a and the light emission surface 31b, and includes a pair of surface portions 33a and 34a facing each other with a concave space therebetween.
　溝部３２をなす一対の面部３３ａ，３４ａのそれぞれは、凹凸形状に形成された第２凹凸部３３ａ１，３４ａ１を備えている。この凹凸形状の第２凹凸部３３ａ１，３４ａ１は、光を拡散させるための第２光拡散部として機能する。第２凹凸部３３ａ１，３４ａ１の形成は、例えば型成形によるレンズ３０の成形時に金型により転写する方法などを用いることができる。もっとも、第２光拡散部としての機能を備えるものであれば、その形成方法を限定するものではない。また、第２光拡散部の機能を実現することができるものであれば、第２凹凸部３３ａ１，３４ａ１以外の手法を用いてもよい。 Each of a pair of surface parts 33a and 34a which make the groove part 32 is provided with 2nd uneven part 33a1, 34a1 formed in uneven | corrugated shape. The second uneven portions 33a1 and 34a1 having the uneven shape function as a second light diffusion portion for diffusing light. The second uneven portions 33a1 and 34a1 can be formed, for example, by a method of transferring with a mold when molding the lens 30 by molding. However, as long as it has a function as a 2nd light-diffusion part, the formation method will not be limited. In addition, as long as the function of the second light diffusion portion can be realized, a method other than the second uneven portions 33a1 and 34a1 may be used.
　保持部３５は、導光棒２５を保持する機能を担っている。保持部３５は、レンズ本体３１の光入射面３１ａと所定の距離を隔てて対向する縦壁３５ａと、縦壁３５ａとレンズ本体３１とを繋ぐ下壁３５ｂとから構成されている。縦壁３５ａ、下壁３５ｂ及びレンズ本体３１の光入射面３１ａから、導光棒２５を保持するための凹状の収容溝が構成される。下壁３５ｂにおける所要の位置にはピン穴が形成されており、導光棒２５のピンをピン穴に挿入することにより、導光棒２５がレンズ本体３１に位置決めされた状態で保持される。保持部３５に保持された状態において、導光棒２５の側壁面２５ｃは、レンズ本体３１の光入射面３１ａと対向する。 The holding unit 35 has a function of holding the light guide rod 25. The holding portion 35 is composed of a vertical wall 35 a facing the light incident surface 31 a of the lens body 31 at a predetermined distance and a lower wall 35 b connecting the vertical wall 35 a and the lens body 31. From the vertical wall 35 a, the lower wall 35 b and the light incident surface 31 a of the lens body 31, a concave housing groove for holding the light guide rod 25 is formed. Pin holes are formed at required positions in the lower wall 35 b, and the light guide rods 25 are held in a positioned state in the lens body 31 by inserting the pins of the light guide rods 25 into the pin holes. The side wall surface 25 c of the light guide rod 25 faces the light incident surface 31 a of the lens body 31 in the state of being held by the holding unit 35.
　組み付け片３６は、レンズ３０を第２アッパー部材３ｂに組み付けて固定するための部材である。組み付け片３６は、保持部３５における所要の範囲に設けられており、当該保持部３５から延設されている。 The assembly piece 36 is a member for assembling and fixing the lens 30 to the second upper member 3b. The mounting piece 36 is provided in a required range of the holding portion 35 and extends from the holding portion 35.
　また、図５に示すように、照明装置１０のレンズ３０と第１アッパー部材３ａとの間には、不織布４０が設けられている。 Moreover, as shown in FIG. 5, the nonwoven fabric 40 is provided between the lens 30 of the illuminating device 10 and the first upper member 3a.
　図６は、本実施形態に係る照明装置１０が備える第２凹凸部３３ａ１，３４ａ１の機能を示す説明図である。以下、本実施形態に係る照明装置１０の動作について説明する。まず、光源ユニット２１から出射された光は、導光棒２５の端面２５ａよりその内部へと入射する。導光棒２５の内部へと入射した光は、内部反射を繰り返しながら、導光棒２５の内部を伝搬される。導光棒２５の内部を伝搬される光のうちその一部は、側壁面２５ｂ（光偏向部２６）において反射される際に偏向され、側壁面２５ｃから出射される。 Drawing 6 is an explanatory view showing the function of the 2nd concavo-convex part 33a1 and 34a1 with which lighting installation 10 concerning this embodiment is provided. Hereinafter, the operation of the lighting device 10 according to the present embodiment will be described. First, light emitted from the light source unit 21 enters the inside from the end face 25 a of the light guide bar 25. The light incident on the inside of the light guide bar 25 is propagated inside the light guide bar 25 while repeating internal reflection. A part of the light propagated inside the light guide rod 25 is deflected when being reflected by the side wall surface 25 b (light deflection unit 26) and emitted from the side wall surface 25 c.
　導光棒２５の側壁面２５ｃから出射された光は、レンズ本体３１の光入射面３１ａに入射する。光入射面３１ａに入射した光は、第１凹凸部３１ａ１において拡散された後、レンズ本体３１の内部を通過し、溝部３２の一方の面部３３ａから出射される。一方の面部３３ａから出射される光は、第２凹凸部３３ａ１において拡散される。 The light emitted from the side wall surface 25 c of the light guide rod 25 is incident on the light incident surface 31 a of the lens body 31. The light incident on the light incident surface 31 a is diffused in the first uneven portion 31 a 1, passes through the inside of the lens body 31, and is emitted from one surface 33 a of the groove 32. The light emitted from the one surface portion 33a is diffused in the second uneven portion 33a1.
　また、一方の面部３３ａから出射された光は、溝部３２の空間を通過して、他方の面部３４ａからレンズ本体３１の内部へと再度入射する。他方の面部３４ａに入射した光は、第２凹凸部３４ａ１において拡散された後、レンズ本体３１の内部を通過する。そして、レンズ本体３１の内部を通過した光は、レンズ本体３１の光出射面３１ｂから出射される。これにより、車両室内側からドアトリム１に臨んだ場合には、第１アッパー部材３ａと第２アッパー部材３ｂとの上側境界部ＢＰに、線状に発光するレンズ３０を視認することとなる。 Further, the light emitted from one of the surface portions 33 a passes through the space of the groove 32, and enters the inside of the lens main body 31 again from the other surface portion 34 a. The light incident on the other surface portion 34 a is diffused in the second uneven portion 34 a 1 and then passes through the inside of the lens body 31. Then, the light having passed through the inside of the lens body 31 is emitted from the light emission surface 31 b of the lens body 31. Thereby, when facing the door trim 1 from the vehicle interior side, the lens 30 that emits light linearly is visually recognized at the upper boundary portion BP between the first upper member 3a and the second upper member 3b.
　このように本実施形態において、照明装置１０が備えるレンズ３０は、光源部２０からの光が入射する光入射面３１ａと、光入射面３１ａから入射した光を車両室内に向けて出射する光出射面３１ｂと、光入射面３１ａと光出射面３１ｂとの間に設けられ、凹状の空間を形成する溝部３２と、を有している。ここで、溝部３２は、光を拡散する光拡散部を備えている。具体的には、溝部３２は、凹状の空間を構成する一対の面部３３ａ，３４ａに凹凸形状に形成された第２凹凸部３３ａ１，３４ａ１を光拡散部（第２光拡散部）として備えている。 As described above, in the present embodiment, the lens 30 included in the illumination device 10 emits light from the light source unit 20 to the light incident surface 31a and the light emitted from the light incident surface 31a toward the vehicle interior. It has a surface 31 b and a groove 32 which is provided between the light incident surface 31 a and the light emission surface 31 b and which forms a concave space. Here, the groove portion 32 includes a light diffusion portion that diffuses light. Specifically, the groove portion 32 includes, as a light diffusion portion (second light diffusion portion), second concavo-convex portions 33a1 and 34a1 formed in a concavo-convex shape on a pair of surface portions 33a and 34a constituting a concave space. .
　この構成によれば、レンズ３０が溝部３２を備えているので、この溝部３２をなす一対の面部３３ａ，３４ａに第２凹凸部３３ａ１，３４ａ１を設定することができる。これにより、光入射面３１ａから光出射面３１ｂに至る光路上に、光を拡散する機能を付与することができる。したがって、光入射面３１ａ（第１光拡散部）のみで光を拡散させる場合と比べ、光を拡散させる能力が飛躍的に向上する。よって、光性能についてきめ細かな対応を施すことができる。その結果、光のむらや粗さを抑制することができるので、外観における変化が小さく見栄えのする照明装置１０を提供することができる。 According to this configuration, since the lens 30 is provided with the groove portion 32, the second uneven portions 33a1 and 34a1 can be set on the pair of surface portions 33a and 34a forming the groove portion 32. Thereby, the function of diffusing light can be provided on the optical path from the light incident surface 31a to the light emitting surface 31b. Therefore, the ability to diffuse light is dramatically improved as compared to the case where light is diffused only by the light incident surface 31 a (first light diffusion portion). Thus, it is possible to make a detailed response to the light performance. As a result, since unevenness and roughness of light can be suppressed, it is possible to provide the lighting device 10 that has a small change in appearance and looks good.
　また、この構成によれば、光を拡散させるための光拡散シートを用いる必要がないので、そもそも光拡散シートがずれてしまうといった心配がない。 Moreover, according to this configuration, since it is not necessary to use a light diffusion sheet for diffusing light, there is no concern that the light diffusion sheet is originally displaced.
　また、第２光拡散部を備える溝部３２は、第１光拡散部を備える光入射面３１ａよりも光源部２０から遠ざかった位置にある。光源部２０から遠ざかる程、光の拡散効果が大きいため、溝部３２の光拡散機能を利用することで、高い拡散効率を得ることができる。これにより、光のむらや粗さを有効に抑制することができる。 Moreover, the groove part 32 provided with a 2nd light-diffusion part exists in the position away from the light source part 20 rather than the light-incidence surface 31a provided with a 1st light-diffusion part. As the light diffusion effect is larger as the distance from the light source unit 20 is increased, high diffusion efficiency can be obtained by using the light diffusion function of the groove 32. Thereby, unevenness and roughness of light can be effectively suppressed.
　さらに、レンズ３０における光出射面３１ｂは車両室内側に臨む意匠面となるため、凹凸形状に形成された凹凸部を意匠面に施すことは好まれない傾向にある。しかしながら、溝部３２を備える本手法によれば、意匠面に凹凸部を設けることなく、光を拡散させる能力を増加させることができる。これにより、照明装置１０の非照明時におけるレンズ３０の意匠性の低下を抑制しつつ、照明装置１０の照明時における光のむらや粗さを抑制することができる。 Furthermore, since the light emission surface 31b of the lens 30 is a design surface facing the vehicle interior, it tends not to be preferable to provide the design surface with the concavo-convex portion formed in a concavo-convex shape. However, according to this method including the groove portion 32, the ability to diffuse light can be increased without providing the uneven portion on the design surface. Thereby, it is possible to suppress unevenness and roughness of light at the time of illumination of the illumination device 10 while suppressing a decrease in design of the lens 30 at the time of non-illumination of the illumination device 10.
　なお、本実施形態では、溝部３２をなす一対の面部３３ａ，３４ａの双方に第２凹凸部３３ａ１，３４ａ１を設定しているが、第２凹凸部３３ａ１，３４ａ１は一方の面部３３ａ，３４ａのみに設定するものであってもよい。 In the present embodiment, the second concavo-convex parts 33a1 and 34a1 are set on both of the pair of surface parts 33a and 34a forming the groove part 32, but the second concavo-convex parts 33a1 and 34a1 are provided on only one of the surface parts 33a and 34a. It may be set.
　図７は、第１の実施形態に係る照明装置１０の変形例を示す説明図である。上述した実施形態において、第２光拡散部は、溝部３２（凹状の空間）をなす一対の面部３３ａ，３４ａに設けられた第２凹凸部３３ａ１，３４ａ１から構成されている。しかしながら、図７に示すように、光を拡散するシート状の部材である光拡散シート３７を溝部３２に挿入し、この光拡散シート３７を第２光拡散部として利用するものであってもよい。 FIG. 7 is an explanatory view showing a modified example of the illumination device 10 according to the first embodiment. In the embodiment described above, the second light diffusion portion is constituted by the second uneven portions 33a1 and 34a1 provided on the pair of surface portions 33a and 34a forming the groove 32 (concave space). However, as shown in FIG. 7, a light diffusion sheet 37, which is a sheet-like member for diffusing light, may be inserted into the groove 32, and the light diffusion sheet 37 may be used as a second light diffusion part. .
　この構成によれば、上述の第２凹凸部３３ａ１，３４ａ１と同様、光拡散シート３７によって光を拡散させる能力が飛躍的に向上することになる。これにより、光性能についてきめ細かな対応を施すことができる。その結果、光のむらや粗さを抑制することができるので、外観における変化が小さく見栄えのする照明装置１０を提供することができる。 According to this configuration, the ability to diffuse light by the light diffusion sheet 37 is dramatically improved, as in the case of the above-described second uneven portions 33a1 and 34a1. In this way, it is possible to make a fine response to the optical performance. As a result, since unevenness and roughness of light can be suppressed, it is possible to provide the lighting device 10 that has a small change in appearance and looks good.
　また、本実施形態によれば、光拡散シート３７が溝部３２に挿入されているため、溝部３２によって光拡散シート３７を位置決めし、固定することができる。これにより、光拡散シート３７の位置がずれたり、この位置ずれによって光拡散シートを透過しない光が生じてしまったりするという不都合を抑制することができる。 Further, according to the present embodiment, since the light diffusion sheet 37 is inserted into the groove 32, the light diffusion sheet 37 can be positioned and fixed by the groove 32. As a result, it is possible to suppress the inconvenience that the position of the light diffusion sheet 37 is shifted, or light which is not transmitted through the light diffusion sheet is generated due to the position shift.
　なお、上述の説明では、第２光拡散部として、凹凸形状の第２凹凸部３３ａ１，３４ａ１と、光拡散シート３７とをそれぞれ単独で利用する方法について説明したが、これらの方法を併用するものであってもよい。 In the above description, as the second light diffusion portion, the method of using the second uneven portions 33a1 and 34a1 having the concavo-convex shape and the light diffusion sheet 37 independently has been described, but these methods may be used in combination It may be
（第２の実施形態）
　以下、第２の実施形態に係る照明装置１０について説明する。この第２の実施形態に係る照明装置１０が、第１の実施形態のそれと相違する点は、溝部３２の構成態様である。以下、第１の実施形態と共通する構成の説明は省略することとし、相違点を中心に説明を行う。ここで、図８は、第２の実施形態に係る照明装置１０の要部を示す説明図である。 Second Embodiment
The illumination device 10 according to the second embodiment will be described below. The point in which the illuminating device 10 which concerns on this 2nd Embodiment differs from it of 1st Embodiment is the structural aspect of the groove part 32. FIG. Hereinafter, the description of the configuration common to the first embodiment will be omitted, and the description will be made focusing on the differences. Here, FIG. 8 is an explanatory view showing the main part of the illumination device 10 according to the second embodiment.
　本実施形態において、レンズ本体３１は、分割された２つのレンズ部材３８，３９を一体に接合した構造とされている。一方のレンズ部材３８は、光入射面３１ａと、この光入射面３１ａと対向する面部３８ａとを備えている。他方のレンズ部材３９は、光出射面３１ｂと、この光出射面３１ｂと対向する面部３９ａとを備えている。 In the present embodiment, the lens body 31 has a structure in which two divided lens members 38 and 39 are integrally joined. One lens member 38 is provided with a light incident surface 31 a and a surface portion 38 a facing the light incident surface 31 a. The other lens member 39 includes a light emitting surface 31 b and a surface portion 39 a facing the light emitting surface 31 b.
　本実施形態に係る溝部３２は、一対のレンズ部材３８，３９を隙間を隔てて対向させることで構成されている。具体的には、一対のレンズ部材３８，３９は、一方の面部３８ａと他方の面部３９ａとを向かい合わせた格好となっている。これにより、一方の面部３８ａと他方の面部３９ａとの間の隙間により溝部３２が構成される。 The groove 32 according to the present embodiment is configured by facing a pair of lens members 38 and 39 with a gap therebetween. Specifically, the pair of lens members 38 and 39 has a shape in which one surface 38a and the other surface 39a face each other. Thereby, the groove part 32 is comprised by the clearance gap between one surface part 38a and the other surface part 39a.
　そして、一方のレンズ部材３８の面部３８ａには、第２光拡散部として機能する第２凹凸部３８ａ１が設けられている。同様に、他方のレンズ部材３９の面部３９ａには、第２光拡散部として機能する第２凹凸部３９ａ１が設けられている。 A second uneven portion 38a1 functioning as a second light diffusion portion is provided on the surface portion 38a of one of the lens members 38. Similarly, on the surface 39a of the other lens member 39, a second uneven portion 39a1 functioning as a second light diffusion portion is provided.
　この構成によれば、第１の実施形態に示す手法と同様に、レンズ３０が溝部３２を備えているので、この溝部３２をなす一対の面部３８ａ，３９ａに第２凹凸部３８ａ１，３９ａ１を設定することができる。これにより、光入射面３１ａから光出射面３１ｂに至る光路上に、光を拡散する機能を付与することができる。したがって、光入射面３１ａ（第１光拡散部）のみで光を拡散させる場合と比べ、光を拡散させる能力が飛躍的に向上する。よって、光性能についてきめ細かな対応を施すことができる。その結果、光のむらや粗さを抑制することができるので、外観における変化が小さく見栄えのする照明装置１０を提供することができる。 According to this configuration, since the lens 30 is provided with the groove 32 similarly to the method described in the first embodiment, the second uneven portions 38a1 and 39a1 are set in the pair of surface portions 38a and 39a forming the groove 32. can do. Thereby, the function of diffusing light can be provided on the optical path from the light incident surface 31a to the light emitting surface 31b. Therefore, the ability to diffuse light is dramatically improved as compared to the case where light is diffused only by the light incident surface 31 a (first light diffusion portion). Thus, it is possible to make a detailed response to the light performance. As a result, since unevenness and roughness of light can be suppressed, it is possible to provide the lighting device 10 that has a small change in appearance and looks good.
　また、本実施形態によれば、レンズ本体３１が２つのレンズ部材３８，３９から構成されている。このため、２つのレンズ部材３８，３９について、色合い及び／又は透過率を相違させることで、光性能の調整幅が増加する。これにより、所望とする照明を適切に行うことができる。 Further, according to the present embodiment, the lens body 31 is composed of two lens members 38 and 39. For this reason, the adjustment range of the light performance is increased by making the color tone and / or the transmittance of the two lens members 38 and 39 different. Thereby, desired illumination can be appropriately performed.
　図９は、第２の実施形態に係る照明装置１０の変形例を示す説明図である。上述した実施形態において、第２光拡散部は、溝部３２（凹状の空間）をなす一対の面部３８ａ，３９ａに形成された凹凸形状の第２凹凸部３８ａ１，３９ａ１から構成されている。しかしながら、図９に示すように、光を拡散するシート状の部材である光拡散シート３７を溝部３２に挿入し、この光拡散シート３７を第２光拡散部として利用するものであってもよい。 FIG. 9 is an explanatory view showing a modified example of the illumination device 10 according to the second embodiment. In the embodiment described above, the second light diffusion portion is constituted by the second concavo-convex portions 38a1 and 39a1 of the concavo-convex shape formed on the pair of surface portions 38a and 39a forming the groove 32 (concave space). However, as shown in FIG. 9, a light diffusion sheet 37, which is a sheet-like member for diffusing light, may be inserted into the groove 32, and this light diffusion sheet 37 may be used as a second light diffusion part. .
　この構成によれば、第１実施形態と同様、光拡散シート３７が溝部３２に挿入されているため、溝部３２によって光拡散シート３７を位置決めし、固定することができる。 According to this configuration, as in the first embodiment, since the light diffusion sheet 37 is inserted into the groove 32, the light diffusion sheet 37 can be positioned and fixed by the groove 32.
　以上、本実施形態の車両室内用照明装置について説明したが、本発明はこの実施形態に限定されることなく、その発明の範囲において種々の変更が可能である。 As mentioned above, although the illuminating device for vehicle interiors of this embodiment was demonstrated, this invention can be variously changed in the range of the invention, without being limited to this embodiment.
　例えば、光源部として導光棒を用いる必要はなく、ＬＥＤなどの光源を所定のピッチでレンズに配置してもよい。 For example, it is not necessary to use a light guide bar as the light source unit, and light sources such as LEDs may be arranged on the lens at a predetermined pitch.
　また、車両用内装部材としては、ドアトリムに限らず、インストルメントパネル、ルーフパネルなど種々のものに適用することができる。また、上述した実施形態では、２つの内装部材の境界部に照明装置を配置しているが、一体の内装部品に形成された隙間に照明装置を配置するものであってもよい。 Moreover, as an interior member for vehicles, it can apply not only to a door trim but to various things, such as an instrument panel and a roof panel. Further, in the above-described embodiment, the illumination device is disposed at the boundary between the two interior members. However, the illumination device may be disposed in a gap formed in an integral interior part.
　　　１　　　ドアトリム
　　　２　　　ドアトリム本体
　　　３　　　ドアトリムアッパー
　　　３ａ　　第１アッパー部材（第１内装部材）
　　　３ｂ　　第２アッパー部材（第２内装部材）
　　　４　　　ドアトリムロア
　　１０　　　照明装置
　　２０　　　光源部
　　２１　　　光源ユニット
　　２５　　　導光棒
　　３０　　　レンズ
　　３１　　　レンズ本体
　　３１ａ　　光入射面
　　３１ａ１　第１凹凸部（第１光拡散部）
　　３１ｂ　　光出射面
　　３２　　　溝部
　　３３ａ，３４ａ　　面部
　　３８ａ，３９ａ　　面部
　　３３ａ１，３４ａ１　　第２凹凸部（第２光拡散部）
　　３８ａ１，３９ａ１　　第２凹凸部（第２光拡散部）
　　３５　　　保持部
　　３６　　　組み付け片
　　３７　　　光拡散シート 1 door trim 2 door trim main body 3 door trim upper 3a first upper member (first interior member)
3b Second upper member (second interior member)
DESCRIPTION OF SYMBOLS 4 door trim lower 10 illuminating device 20 light source part 21 light source unit 25 light guide rod 30 lens 31 lens main body 31a light-incident surface 31a1 1st uneven part (1st light-diffusion part)
31b light emitting surface 32 groove 33a, 34a surface 38a, 39a surface 33a1, 34a1 second uneven portion (second light diffusing portion)
38a1, 39a1 second uneven portion (second light diffusing portion)
35 holder 36 assembly piece 37 light diffusion sheet

Claims (6)

  1. 　車両室内に装着される内装部品に設けられて車両室内側へと照明光を出射する車両室内用照明装置において、
    　光を出射する光源部と、
    　前記内装部品に設けられた隙間に挟持され、前記光源部からの光を車両室内に向けて出射するレンズと、を有し、
    　前記レンズは、
    　前記光源部からの光が入射する光入射面と、
    　前記光入射面から入射した光を車両室内に向けて出射する光出射面と、
    　前記光入射面と前記光出射面との間に設けられ、凹状の空間を形成する溝部と、を有し、
    　前記溝部は、光を拡散する光拡散部を備える
    ことを特徴とする車両室内用照明装置。     A lighting device for a vehicle room, which is provided in an interior part mounted in a vehicle room and emits illumination light to the vehicle room side.
    A light source unit that emits light;
    And a lens which is held in a gap provided in the interior part and emits light from the light source toward the vehicle interior.
    The lens is
    A light incident surface on which light from the light source unit is incident;
    A light emitting surface for emitting light incident from the light incident surface toward a vehicle cabin;
    And a groove which is provided between the light incident surface and the light exit surface and which forms a concave space,
    The said groove part is provided with the light-diffusion part which diffuses light, The illuminating device for vehicle interiors characterized by the above-mentioned.
  2. 　前記溝部は、前記凹状の空間を構成する一対の面部の一方又は双方に凹凸形状に形成された凹凸部を前記光拡散部として備える
    請求項１記載の車両室内用照明装置。     The vehicle interior illumination device according to claim 1, wherein the groove portion includes an uneven portion formed in an uneven shape on one or both of the pair of surface portions constituting the concave space as the light diffusion portion.
  3. 　前記溝部は、前記凹状の空間に挿入され、光を拡散するシート状の部材である光拡散シートを前記光拡散部として備える
    請求項１記載の車両室内用照明装置。     The vehicle interior lighting device according to claim 1, wherein the groove portion includes a light diffusion sheet, which is a sheet-like member that is inserted into the concave space and that diffuses light, as the light diffusion portion.
  4. 　前記溝部は、前記光入射面及び前記光出射面の面方向に沿って穿孔されている穴部である
    請求項１から３のいずれかに記載の車両室内用照明装置。     The vehicle interior lighting device according to any one of claims 1 to 3, wherein the groove portion is a hole portion which is perforated along the surface direction of the light incident surface and the light emission surface.
  5. 　前記レンズは、前記光入射面が設けられた第１レンズ部材と前記光出射面が設けられた第２レンズ部材とを一体に接合した構造であり、
    　前記溝部は、前記第１レンズ部材と前記第２レンズ部材とを隙間を隔てて対向させることで構成される
    請求項１から３のいずれかに記載の車両室内用照明装置。     The lens has a structure in which a first lens member provided with the light entrance surface and a second lens member provided with the light exit surface are integrally joined.
    The vehicle interior lighting device according to any one of claims 1 to 3, wherein the groove portion is configured by facing the first lens member and the second lens member with a gap therebetween.
  6. 　前記レンズは、互いに接合されて前記内装部品を構成する第１内装部材と第２内装部材との境界部に挟持される
    請求項１から５のいずれかに記載の車両室内用照明装置。     The vehicle interior lighting device according to any one of claims 1 to 5, wherein the lens is sandwiched between the first interior member and the second interior member which are joined to each other to constitute the interior part.
PCT/JP2017/031070 2017-08-30 2017-08-30 Vehicle cabin lighting device WO2019043816A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/031070 WO2019043816A1 (en) 2017-08-30 2017-08-30 Vehicle cabin lighting device

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2317214A1 (en) * 2009-11-02 2011-05-04 Valeo Vision Lighting or signalling device for an automobile comprising a light guide
US20130155708A1 (en) * 2011-12-15 2013-06-20 Joshua L. Moberg Door trim pull cup ambient light
JP2015039936A (en) * 2013-08-21 2015-03-02 トヨタ紡織株式会社 Light source unit
JP2016124351A (en) * 2014-12-26 2016-07-11 テイ・エス テック株式会社 Vehicle decorative member

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2317214A1 (en) * 2009-11-02 2011-05-04 Valeo Vision Lighting or signalling device for an automobile comprising a light guide
US20130155708A1 (en) * 2011-12-15 2013-06-20 Joshua L. Moberg Door trim pull cup ambient light
JP2015039936A (en) * 2013-08-21 2015-03-02 トヨタ紡織株式会社 Light source unit
JP2016124351A (en) * 2014-12-26 2016-07-11 テイ・エス テック株式会社 Vehicle decorative member

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