JP2019081392A - Vehicular interior member comprising luminaire - Google Patents

Abstract

To provide a vehicular interior member which retains a linear light guide member having flexibility to a stable shape and enhances designability by an illumination pattern.SOLUTION: In a vehicular interior member which comprises a light emission part consisting of a linear light guide member having flexibility, a substrate at least partially having a light transmission part made of a light transmissive material, and a light source emitting a laser beam incident into the light guide member, an arbitrary line light emission pattern is formed by using the light guide member as the vehicular interior member buried in the light transmission part of the substrate and retaining the light guide member to the stable shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an interior member for a vehicle, and more particularly to an interior member provided with a lighting device of a vehicle such as a car.

  Various interior members are installed on the interior of a vehicle, for example, a floor, a door, a roof, etc. of a vehicle in consideration of the riding comfort and design of a passenger. In recent years, attempts have been made to incorporate lighting in order to improve the design.

  Patent Document 1 describes an automobile accessory equipped with a light emitting fabric integrated with a power source or a light source by a light source and a self-light emitting body, and a light emission in which an optical fiber with lateral light leakage is incorporated. An arrangement is shown in which the knitted fabric is arranged at the edge of the floor mat of the motor vehicle.

  Patent Document 2 discloses a mat device in which a light emitting unit is laid on the periphery of a mat main body laid on a floor surface, and the light emitting unit includes an optical fiber for emitting light received from a light source from the side, Is fixed to the mat main body with a light storage material that emits light and emits light.

  The use of optical fibers for interior materials such as floorings to provide design is also being studied in fields other than vehicles. Patent Document 3 relates to an interior / exterior material of a building, in a laminate formed by sequentially laminating a non-woven mat or plastic tile, a transparent vinyl chloride sheet and an acrylic base plate, between the vinyl chloride sheet and the acrylic sheet. An inner / exterior material is described in which a large number of optical fibers having light emitting surfaces in the longitudinal direction are arranged in parallel, and transparent acrylic resin is filled and cured in cutouts provided in the mat or tile.

Utility model registration 3206217 gazette JP, 2016-117427, A Registered Utility Model No. 2600387

  In the interior member for vehicles, the flexibility (or plasticity) which can be deformed according to the curved surface shape of each part is called for. In addition, pressure resistance to pressure is also required at a portion where the passenger's body contacts, such as a floor that is repeatedly stepped on with a foot. Patent Document 1 discloses a configuration in which a knitted fabric including an optical fiber is disposed on the outer periphery of a floor mat, and Patent Document 2 also discloses a configuration in which an optical fiber is attached to the periphery of the mat. In the configuration, although the flexibility of the mat is maintained, it can not be said that the protection of the light emitting part is sufficient when stepping on with a foot, etc., and the lighting effect is excellent in design at any place on the surface of the mat. It is difficult to get Furthermore, when the optical fiber is fixed to the mat by sewing or bonding, it can not be easily removed when cleaning the floor mat. The interior material described in Patent Document 3 has a structure in which an acrylic is used as a base material and a cutout portion is filled with an acrylic resin, so that flexibility which can be used for a floor mat of an automobile or the like can not be expected. In addition, since the optical fibers are used in the form of bundles, it is not considered to utilize the characteristics as a linear light-emitting body in design.

  Patent Document 1 describes an LED as a light source. Although the patent document 3 does not have a specific description regarding a light source, what is illustrated is a light bulb. Although Patent Document 2 describes laser light as an option of a light source, the description of the embodiment is based on an LED, and describes that the light source may be a light bulb, a cold cathode tube, etc. . In the case of using a light source that emits light such as an LED or a light bulb, it is difficult to guide light to a long distance in a small diameter light guide such as an optical fiber.

  In view of the above-mentioned present situation, the present invention can guide a long distance (for example, 1 m or more) by using a flexible light guide member having a narrow diameter (for example, less than 0.9 mm in diameter of the light guide portion) Moreover, it aims at providing an interior member for vehicles with a lighting installation provided with a light emission part (illumination part) which can hold stably a desired luminescence pattern obtained by making a light guide bend. Still another object of the present invention is to provide an interior member with a lighting function which has flexibility capable of following the internal structure of a vehicle and which is also excellent in compression resistance.

The first configuration of the present invention is
A flexible linear light guide member;
A substrate having a light transmitting portion made of a translucent material at least in part;
A vehicle interior member comprising: a light emitting unit including a light source for emitting a laser beam entering the light guide member;
The light guide member is a vehicle interior member embedded in a light transmitting portion of the base.

  According to the interior member of the above configuration, the light guide member having flexibility in the light emitting portion is stably held in a desired shape, an arbitrary linear light emission pattern is formed, and the interior member is provided with designability A function as a lighting device can be provided. Further, since the light source emits laser light, even when the light guide has a small diameter, light can be emitted up to the end of the long light guide.

  In the vehicle interior member, the light guide member may be a light diffusing optical fiber in which the diameter of the light guide portion is less than 1 mm.

  According to the vehicle interior member of the above configuration, in the light emitting portion, the optical fiber having a diameter of less than 1 mm can be stably held in a bent state to a radius of curvature (R) of 10 mm or less, and a plurality of long optical fibers are used. A light emission pattern consisting of light emission lines can be realized.

  In the interior member for a vehicle having the above configuration, the base includes a base body and a light transmitting member constituting the light transmitting portion, and the light transmitting portion is fitted in a groove formed in the base body. The light guide member may be a vehicle interior member fitted in a recess provided in the light transmitting portion.

  According to the interior member for a vehicle having the above configuration, an arbitrary light emission pattern can be obtained by processing the groove pattern by using the base body and the light transmitting portion as separate members. In addition, assembly of the light guide member is easy.

  In the interior member for a vehicle having the above configuration, the cross section of the groove has a tapered portion in which the groove width on the substrate surface side is narrower than the groove width on the substrate back surface side, and the outer surface of the light transmitting portion It may have a tapered portion corresponding to the shape of the groove. In addition, the recess of the light transmission portion may also have a tapered cross section.

  With the above configuration, when installing the light transmitting portion on the base body or when installing the light guide in the light transmitting portion, positioning can be performed easily and accurately.

In the interior member for a vehicle, the opening width of the groove on the surface side of the base material is W, the depth of the light guiding member is z, the refractive index of the light transmitting member is n ₁ , the light transmitting member and the base When the refractive index of the interface of the material body is n ₂ and the refractive index of _air is n _air ,
The inclination angle θ of the interface between the light transmitting member and the base body with respect to the surface of the base may satisfy the following equation.

  The said vehicle interior member may consist of a flexible material, and the said vehicle interior member may comprise a vehicle floor laying member.

  Since the interior member for a vehicle equipped with a lighting device with the above configuration has flexibility and impact pressure resistance, damage to the light guide can be prevented even when used as a floor laying member that is stepped on frequently by the passenger's foot By the light emission pattern from the light guide, high designability can be given to the laying member.

  The vehicle interior member constituting the floor laying member may further include a floor laying member main body made of a fabric, and the light emitting unit may be detachably attached to the floor laying member main body.

  According to the interior member for a vehicle having the above configuration, the floor laying member main body and the light emitting unit (illumination device) are detachably attached, so that the floor laying member main body can be removed when being cleaned, and separately from the floor laying member main body Can also be exchanged.

  In the above-described vehicle interior member, the floor laying member main body may be made of pile fabric, and the light emitting unit may be attached to the floor laying member main body via a surface fastener.

  According to the vehicle interior member, the light emitting unit can be easily attached to and detached from the floor laying member main body.

  According to the interior member of the present invention, the flexible light guide member can be stably held in a desired shape. At that time, long total linear light emission can be realized using a light guide member of small diameter such as an optical fiber and a laser light source, and an arbitrary linear light emission pattern can be formed.

It is a schematic plan view showing the floor laying member concerning one embodiment of the interior member for vehicles of the present invention. It is an enlarged view of the part shown with frame II in the interior member of FIG. It is sectional drawing of the light emission part of an interior member shown by line | wire III-III of FIG. It is the schematic plan view which looked at the light emission part in the interior member of FIG. 1 from the back surface. It is the schematic which shows the assembly process of the interior member of FIG. It is a figure for demonstrating the preferable conditions of the light emission part cross section shown in FIG. It is a figure which shows the modification of the floor laying member concerning one Embodiment of the interior member for vehicles of this invention. It is a figure for demonstrating the wiring of a light guide member in the floor laying member shown to b of FIG.

  Hereinafter, the configuration of the present invention will be described with reference to the drawings. Each drawing is a conceptual diagram for explaining the configuration of the invention, and does not represent an actual dimensional ratio. In the different drawings, the corresponding components are denoted by the same reference numerals and the detailed description will be omitted.

  FIG. 1 is a schematic plan view showing a vehicle floor laying member 1 as an embodiment of a vehicle interior member including a lighting device according to an embodiment of the present invention. The interior member (floor laying member) 1 includes a floor laying member main body (floor mat) 2 and a light emitting unit 3. The base 4 of the light emitting unit 3 includes a base body 40 and a light transmitting member 42. FIG. 2 is an enlarged view of a portion shown by a frame II in FIG. As shown here, below the light transmission member 42, a flexible linear light guide member (optical fiber) 6 is embedded. Although not an essential configuration, in the present embodiment, the hard plate member 5 is disposed for the purpose of protecting the light source disposed in the light emitting unit 3. The plate member 5 can also be used as, for example, a plate for displaying a vehicle emblem or a name.

  3 is a schematic cross-sectional view along line III-III of FIG. The base body 40 is formed with a groove 41 having an opening 41a on the base surface side, and the inner surface thereof is an upper (front side) tapered surface 41b, a lower (back side) tapered surface 41c, and both A step surface 41d connecting the tapered surfaces 41b and 41c is formed, and the groove width is narrowed from the back surface side to the front surface side. The step surface 41 d is a surface substantially parallel to the surface of the base body 40. The light transmitting member 42 is fitted in the groove 41, and connects the top surface 42a, the upper tapered surface 42b, the lower tapered surface 42c, and the both tapered surfaces 42b and 42c in accordance with the shape of the groove 41. And a step surface 42d. The light transmitting member 42 is provided with a recess 42f which is recessed in a tapered manner from the bottom surface 42e toward the inside, and the light guide member (optical fiber) 6 is inserted into the recess 42f. The sealing member 43 is further inserted into the recess 42 f from the side of the bottom surface 42 e to fix the light guiding member 6 in the light transmitting member 42. In the present embodiment, although a two-step tapered groove cross section is shown, the number of tapered surfaces may be one, or three or more.

  FIG. 4 is a schematic plan view of the light emitting unit 3 as viewed from the back side. The grooves 41 form a line pattern on the base body 40. The groove 41 has the cross-sectional structure shown in FIG. 3 in the portion (opening groove portion 410) opened in the surface of the base body 40, but in the portion without the opening in the surface (connection groove portion 411). Similar to the recess 42 f of the light transmitting member 42, a cross-sectional structure that does not reach the surface of the base body 40 is adopted. The long light guide member (optical fiber) 6 is disposed along the groove 41 and is held by the light transmitting member 42 and the sealing member 43 placed in the groove. A terminator (reflector: not shown) may be installed at the end of the light guide member 6 in order to improve the luminous efficiency. The proximal end of the light guide member 6 is connected to a laser light source 7 such as a laser diode, and is disposed such that the laser light emitted from the light source 7 enters from the end face. The laser light source 7 is connected to an external power supply (not shown) via the harness 8.

  FIG. 5 is a schematic view showing the assembly of the light emitting unit 3 to the floor laying member main body 2. The light emitting unit 3 may be assembled to the floor laying member main body 2 in the above state, but as illustrated, the backing member 9 may be bonded to the back surface. By bonding the surface fastener 10 to the back surface of the base body 40 or the backing member 9, the light emitting unit 3 is formed on the floor laying member body 2 (for example, a floor mat made of pile fabric) via the surface fastener 10. It is removably attached. With this configuration, the floor laying member main body 2 can be cleaned or replaced separately from the light emitting unit 3.

FIG. 6 is a view for explaining the conditions of the upper part of the cross-sectional structure shown in FIG. The width of the opening 41a of the groove 41 is W, the depth of the light guiding member (the distance from the top surface 42a of the light transmitting member 42 to the upper surface of the light guiding member 6) is z, the light transmitting member 42 and the base body 40 the interface (upper tapered surface 41a, 42b) when the inclination angle with respect to the substrate surface of theta, W, z, by adjusting the theta to the appropriate range, only the direct light L _D from the light guide member 5 Instead, the light L _R reflected at the interface between the base body 40 and the light transmitting member 42 can also be used, and the range in which the passenger can visually recognize the illumination can be expanded.

Specifically, the maximum value of the angle formed by the reflected light L _R when the light reflected at the interface is transmitted without total reflection on the surface of the light transmission member (the limit viewing angle) ) the beta, the direct light L _D is the maximum value of the angle (limit viewing angle) and alpha serving the same vertical line, under the condition that the beta> alpha, but it is possible to widen the viewing range of the illumination, the condition Can be expressed by the following equation.

Here, n ₁ is the refractive index of the light transmitting member 42, n ₂ is the refractive index of the interface between the light transmitting member 41 and the base body 40, and n _air is the refractive index in air.

In consideration of the material of the common transparent resin, n ₁ is about 1.40 to 1.65 (in the case of transparent urethane 1.49), similar to the light transmitting member 42 to the base body 40 material Can be used (colored). n _air and n ₂ may be 1.0. The depth z is preferably 2.5 mm or more in order to prevent breakage of the light guide member 6 due to stepping, for example. In order to mount the light transmitting member 42 in the groove 41, it is preferable that θ be less than 90 °.
In addition, although it does not specifically limit, 0.5 to 5.0 times the diameter D of the light guide member may be sufficient as the opening width W of the groove | channel in the base-material surface side.

(Light guiding member)
In the present invention, as the light guide member, it is preferable to use a flexible thin light guide member such as an optical fiber. The light guiding member may be an optical fiber consisting only of a light guiding part, but may be an optical fiber consisting of a core wire for light guiding consisting of one or more fibers and a covering material for protection. For example, an optical fiber made of a glass fiber core wire serving as a light guide portion and a resinous coating material such as polyvinyl chloride (PVC) may be used. The optical fiber may be one (light diffusing fiber) in which the light diffusing property to the side is improved by defects and / or scattering particles and the like. In addition, a phosphor may be dispersed in the coating material of the optical fiber. A commercial item can be used as an optical fiber as described above. By using an optical fiber, a light guide member (optical fiber) having a diameter of less than 3 mm, and even less than 1 mm (for example, 0.9 mm) and a diameter of a light guide portion of for example less than 0.9 mm , Fine linear light emission can be obtained. The length of the light guide member to be used is not particularly limited, but in the present invention, by combined use of the thin optical fiber and the laser light source, long light guide becomes possible, specifically, 1 m or more, further 3 m or more Furthermore, it is also possible to set it as the length of 5 m or more, for example, it can select suitably from the length of the range of about 0.1-10 m, 1-10 m, 3-5 m, 5-10 m. A commercially available thing can be used for said light guide member, and the light guide member currently sold under the brand name with Fibrance by Corning Inc. may be used as an example.

(light source)
As a light source, a laser light source excellent in directivity is used. The laser light source is not particularly limited, but it is preferable to use a laser diode (LD) because the size of the light source can be reduced, the price is low, a stable output can be obtained, and the power consumption is low. A single-color laser beam from one laser light source may be used, but for example, mixed light using two-color or three-color laser light appropriately selected from red, green and blue three-color laser light By doing this, laser light of a desired color may be formed and used. In the embodiment shown in FIG. 4, the laser light source 7 is disposed on the back side of the light emitting unit, but a light guide for light transmission which transmits a light from the laser light source by disposing the light source such as a laser diode outside A light transmission fiber) may be used as a light source, and the light guide may be connected to this.

(Light transmitting member)
It is preferable that the light transmission member which comprises a light transmission part consists of transparent flexible resin. For example, a transparent urethane resin can be used, but other elastomer-based or silicone-based transparent resins (for example, transparent silicone resins) may be used.

(Base material)
The material which comprises a base material body is not specifically limited, Although hard resin may be used depending on a use, when using for interior members which require flexibility, such as a floor laying member, a base material body is also flexible. It is preferably a resin. For example, a colored urethane resin may be used, or other elastomer-based or silicone-based resin may be colored and used. In addition, the same material as the base body can be used for the sealing member. When the base body is made of a hard material depending on the application, a metal may be used, or a resin such as an acrylic resin or a polycarbonate resin may be used. The plate member protecting the light source can also be formed from similar materials.

(Vehicle interior components)
When the interior member of the present invention is used as a floor laying member, the present invention is not limited to the illustrated embodiment, and various modifications are possible. For example, in FIG. 4, the laser light source is disposed on the back side of the light emitting unit 3 and protected by the plate member 5. However, when the light source is disposed outside the floor laying member, the plate member 5 is omitted. It is also good. Although said embodiment demonstrated the structure which installs a light emission part in the floor laying member main body made from cloth, you may process the base material which consists of flexible resin in the shape of a floor laying member. The contour shape of the floor laying member is changed according to the position to be used, the type of vehicle, and the like.

  The arrangement of the light emitting parts and the light emission pattern can be arbitrarily changed. For example, in the interior member 1 shown in a) in FIG. 7, the light emitting unit 3 is disposed near the center of the floor laying member 1. In the interior member 1 shown in b), the base material body 40 has a function as a floor laying member, and by arranging the light guide members in the light transmitting member 42 in a cross configuration, a mesh-like light emission pattern is formed There is.

FIG. 8 is a diagram for explaining the method of forming the light emission pattern shown in FIG. 7 b). For the sake of explanation, the width of the light transmission member 42 is emphasized, and the individual light transmission members 42 arranged in a line are illustrated. In order to distinguish (hereinafter referred to as a line), symbols l _{1 to} l ₁₁ are attached. The arrangement of the light guide member is partially shown by a broken line with an arrow, and the direction of the arrow indicates the direction from the base end to the end of the light guide member 6 (the direction in which the laser light is guided). Guiding member 6 which is connected to the light source 7 is first routed to l ₁ (light transmitting member 42 arranged in a line) the right end of the line in FIG. Light guide member leaving the line l ₁ is an arrival line l ₂ adjacent bent, it is wired from the right end of the line l ₁ to the left edge of the l _6. Light guide member leaving the line l ₆ is an arrival line l _7, likewise, is wired from l ₇ to line l ₁₁ via the _{l 8, l 9, l 10} . Here, in the line l ₇ to l _11, (from the back surface 42e side) the depth of the recess 43 to place the light guide member 6, less than the depth of the recess 43 in the line l ₁ to l ₆ and (shallower) at best, and / or the position where the line intersects (e.g., may be a notch provided on the line l ₇ to l _11. in this way, by using the light guide member of a single elongated stitches It is possible to form various light emission patterns in the same manner as in the one-stroke writing method.

  In the above embodiment, the floor laying member including the light emitting unit is described as an example of the vehicle interior member of the present invention, but the application of the interior member of the present invention is not limited to the floor laying member, and door panels and roof panels Or, it may be applied to the back of a seat or the like. Alternatively, it can be applied to floor materials of large vehicles such as buses and trains. In this case, the interior member of the present invention can be suitably used as a member with a lighting function for a vehicle such as a car, and provides a interior member with a lighting function by combining various vehicle interior members with a light emitting part. be able to. According to the present invention, light can be emitted from a thin portion by using a light guide member having a small diameter, and if necessary, the light emitting portion is disposed at a position away from the light source by using a light transmission member. Since it is possible to emit light, it is possible to emit light at the position where it is difficult to arrange the electric circuit and the electric wiring for lighting, so that it can be applied to various vehicle parts.

  According to the interior member with illumination function of the present invention, it is possible to provide an interior member having an illumination function that exhibits linear light emission of an arbitrary shape using a flexible thin and long light guide member having a long diameter. it can. Such an interior member can enhance the design of the interior of a vehicle such as a car.

1 Interior member (floor laying member)
Reference Signs List 2 floor laying member body 3 light emitting portion 4 base 5 plate member 6 light guiding member 7 laser light source 40 base body 41 groove 41a opening 41b, 41c tapered portion 42 light transmitting member 42b, 42c tapered portion 9 backing member 10 Hook-and-loop fastener D Light guide member diameter W Groove width z Light guide member depth θ Interface inclination angle

Claims (7)

A flexible linear light guide member;
A substrate having a light transmitting portion made of a translucent material at least in part;
It is an interior member for vehicles provided with the light emission part containing the light source which emits the laser beam which enters into the above-mentioned light guide member, and being provided.
The interior member for a vehicle, wherein the light guiding member is embedded in a light transmitting portion of the base.   The vehicle interior member according to claim 1, wherein the light guide member is an optical fiber having a diameter of less than 1 mm.   The vehicle interior member according to claim 1, wherein the base includes a base body and a light transmitting member that constitutes the light transmitting portion, and the light transmitting member is formed on the base body. An interior member for a vehicle, which is fitted in the groove formed in the housing and the light guide member is fitted in a recess provided in the light transmission member.   The vehicle interior member according to claim 3, wherein the groove cross section has a tapered portion in which the groove width on the substrate surface side is narrower than the groove width on the substrate back surface side, and the outer surface of the light transmitting member The vehicle interior member having a tapered portion corresponding to the shape of the groove. A vehicle interior member according to claim 3 or 4, wherein
The opening width of the groove on the surface of the base material is W, the depth of the light guide member is z, the refractive index of the light transmitting member is n ₁ , and the refractive index of the interface between the light transmitting member and the base material is When n ₂ and the refractive index of _air are n _air ,
An interior member for a vehicle, wherein an inclination angle θ of the interface between the light transmitting member and the base body with respect to the surface of the base satisfies the following expression.

  It is an interior member for vehicles according to any one of claims 1 to 5, and the interior material for vehicles which the base material consists of material which has flexibility, and constitutes a floor laying member with a lighting function.   The vehicle interior member according to claim 6, further comprising a floor laying member main body made of a fabric, wherein the light emitting unit is detachably attached to the floor laying member main body via a surface fastener. Interior parts.

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