JP2009262911A - Lighting system for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system for a vehicle having both a function for lighting feet of an occupant when getting in/out, and a function as a rear display function, enabled to reduce a space for installation by miniaturizing, and can contribute to the improvement of the degree of freedom in the design of a vehicle door. <P>SOLUTION: This lighting system for the vehicle is provided at a lower edge of a vehicle door so as to light in a state that the vehicle door is opened. This lighting system for the vehicle includes: a LED lamp mounted on a substrate so that a light emitting side is arranged on a lower edge side of the vehicle door; a light entrance surface positioned on a light emitting side of the LED lamp, facing the LED lamp; a first light emitting portion positioned in a lower surface of the vehicle door; a second light emitting portion positioned in a cabin inside surface or a cabin side end surface of the vehicle door; a reflecting portion for receiving one part of light which has entered through the light entrance surface, and is reflected to the second light emitting portion; and a light guide. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an improvement in a vehicle interior lighting device for a vehicle.

Some vehicles include a courtesy lamp that is provided inside the door, lights up in conjunction with the opening and closing of the door, and illuminates the feet of passengers. There are also vehicles equipped with lamps that are lit when the door is opened and indicate that the door is open to the rear of the vehicle. For example, Patent Literature 1 discloses an illumination device that illuminates the feet of passengers and the rear of a vehicle using a foot LED lamp and a rear LED lamp, respectively. On the other hand, Patent Document 2 discloses an illuminating device including an LED lamp having both the function of a foot LED lamp and the function of a rear LED lamp. The illumination device of Patent Document 2 is provided at an end portion on the inner side of the door, and illuminates three directions of a passenger's feet, the rear of the vehicle, and the inner side of the vehicle. Thus, by integrating a plurality of functions, cost reduction and design improvement are achieved.
JP 2007-22325 A JP 2005-280657 A

The vehicle door is provided with various members such as a door pocket, a door handle, a door lock mechanism, a door window, and switches in addition to the courtesy lamp and the rear display lamp when the door is opened. The door pocket or the like is preferably provided in a desired size and in a desired position in consideration of user convenience. However, in a vehicle equipped with a courtesy lamp, it is necessary to adjust the shape of the door pocket in order to secure an installation area of the courtesy lamp, and the degree of freedom in designing the door pocket is reduced. Specifically, a convex portion is provided at the bottom of the door pocket, and a courtesy lamp is accommodated on the inner plate side. According to the door pocket adjusted in this way, the storage capacity is reduced and the usability is reduced. Therefore, in order to increase the degree of freedom in designing the door pocket, to secure the capacity of the door pocket and to improve the usability, there is a demand for downsizing of the courtesy lamp.
On the other hand, in the illumination device of Patent Document 1, the foot illumination and the rear display are performed by different light sources. Therefore, installation space for each light source is required, and it is difficult to reduce the size of the apparatus. In the illumination device of Patent Document 2, light from one light source travels in three directions through the outer lens. However, if the light source and the outer lens are brought close to each other, light cannot be distributed with good balance in each direction. This is particularly noticeable with light sources with high directivity, such as LED lamps. Therefore, it is necessary to dispose the outer lens and the light source at a considerable distance, and it is difficult to reduce the size of the apparatus.
SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle lighting device that has both a function of illuminating a passenger's feet and a rear display, and is compact.

In order to solve the above problems, the present invention has the following configuration. That is,
A vehicle lighting device that is provided at a lower edge of a vehicle door and lights up in a state in which the vehicle door is opened,
An LED lamp mounted on a substrate such that a light emitting side is a lower edge side of the vehicle door;
Located on the light emission side of the LED lamp, located on the light incident surface facing the LED lamp, the first light emission portion located on the lower surface of the vehicle door, and the vehicle interior side or side end surface of the vehicle door. A light guide having a second light emitting portion and a reflecting portion that receives a part of the light incident from the light incident surface and reflects the light to the second light emitting portion side;
It is an illuminating device for vehicles provided with.

According to the configuration of the vehicle lighting device of the present invention, the light emission side of the LED lamp is provided so as to be the lower edge side of the vehicle door. Thereby, compared with the case where the light emission side of the LED lamp is provided on the side surface side or obliquely below, the thickness of the device itself is reduced and the size is reduced. As a result, it contributes to improvement in the degree of freedom in designing peripheral members such as door pockets.
The lighting mode of the vehicle lighting device of the present invention is as follows. That is, in a state where the vehicle door is opened, part of the light of the LED lamp enters the light guide plate and is emitted to the outside from the first light emitting portion located on the lower surface of the vehicle door. This light illuminates the ground below the opened vehicle door, and functions as a courtesy lamp that illuminates the feet of passengers. On the other hand, a part of the light of the LED lamp enters the light guide plate, is received by the reflecting portion, reflected to the second light emitting portion side, and emitted from the second light emitting portion to the outside. Since the second light emitting part is located on the side surface or the side end face of the vehicle door, the light emitted from the second light emitting part functions as a rear display lamp when the door is opened. As described above, the vehicular lighting device of the present invention is a vehicular lighting device that integrates the function as a courtesy lamp and the rear display function when the door is opened. Therefore, space saving, a reduction in the number of parts, a simplification of the mounting process, and a reduction in cost are realized as compared with the case where a lighting device is provided separately.

(LED lamp)
The vehicle lighting device of the present invention uses an LED lamp as a light source. The LED lamp has various advantages such as small size, low driving power, low calorific value, and long life. The type of the LED lamp is not particularly limited, and various types of LED lamps such as a surface mount (SMD) type, a shell type (lens type), and a chip on board (COB) type can be adopted. Among these, it is preferable to adopt the SMD type. This is because the SMD type is small and contributes to thinning and downsizing of the device. In addition, in the shell type, the COB type, etc., the surface is formed in a convex shape and the emitted light is condensed, so that the directivity of the light source becomes too high. On the other hand, in the SMD type, the reflective part in the package is usually formed of white resin or white ceramic, and the emitted light is diffusely reflected by the reflective part, so the directivity of the light source is low. In the present invention, as described above, a part of the light of the LED lamp is taken out from the first light emitting part and the other part of the light of the LED lamp is taken out from the second light emitting part, so that the light source has low directivity. Is preferred. From this point of view, it is preferable to employ an SMD type LED lamp. Further, the LED lamp is more preferably a flat surface or a concave surface that is recessed by the surface tension of the sealing resin among the SMD types. This is because the directivity is further lowered.
The emission color of the LED lamp can be arbitrarily selected. For example, an LED lamp having an emission wavelength in the visible region such as white, red, amber, green, and blue can be employed. It is also possible to use an LED lamp that converts part of the light of the LED chip with a phosphor and emits light in which the light of the LED chip and fluorescence are mixed. The phosphor can be contained in, for example, a sealing resin for LED lamps. A layer containing a phosphor may be provided on the surface of the sealing resin.

  An LED lamp in which a plurality of LED chips of the same type or different types are incorporated can also be used as a light source. For example, a desired color can be emitted by using an LED lamp (3-in-1 LED lamp) in which LED chips of red, green, and blue are mounted on a single substrate and controlling the light emission mode of each LED chip. Thereby, the illuminating device which light-emits a desired luminescent color is comprised. A plurality of the same or different kinds of LED lamps may be used.

  In the present invention, the LED lamp is mounted on a substrate. The kind of board | substrate used here is not specifically limited, Well-known kind board | substrates, such as board | substrates, such as a glass epoxy board | substrate (FR-4) and a flexible substrate (FPC, Flexible Printed circuit), are employable. The substrate is preferably provided substantially parallel to the lower edge of the vehicle door. This is because if the substrates are provided substantially in parallel, the entire apparatus can be made thinner than when the substrates are not provided in parallel.

  A light guide is provided on the light emission side of the LED lamp. The light guide includes a light incident surface facing the LED lamp, a first light emitting portion located on the lower surface of the vehicle door, a second light emitting portion located on the side or side end surface of the vehicle door, and a light incident surface. And a reflection part that receives a part of the light incident from the light source and reflects it to the second light emission part side. The material of the light guide is not particularly limited as long as it is a transparent material. For example, a polycarbonate resin, an acrylic resin, a silicon resin, glass, etc. can be illustrated. Among these, it is preferable to use a polycarbonate resin or an acrylic resin. This is because polycarbonate resin or acrylic resin has high light transmittance, is easy to mold and has excellent strength, and is easy to handle. Since the outer lens is exposed to the lower side of the door trim, it is easy to receive an impact due to contact or collision of a passenger's foot or the like. Therefore, the outer lens is particularly preferably made of polycarbonate resin having high impact resistance. The shape of the light incident surface of the light guide is not particularly limited as long as the light of the LED lamp can be incident, and is usually a smooth flat plate surface, but the shape conforming to the shape of the light emitting portion of the LED lamp. You can also. The light incident surface is preferably disposed close to the light emitting portion of the LED lamp. This is because the efficiency of incidence on the light guide is improved. The shape of the first light emitting portion is not particularly limited. The first light emitting portion is located at the lower edge of the vehicle door and is usually not observed from the outside. Therefore, it is not necessary to perform surface treatment (texture processing or blasting treatment) to prevent the LED lamp or the like located behind the light guide from being visually recognized when observed from the outside. In addition, for the purpose of diffusing the light emitted from the first light emitting portion, the first light emitting portion can be subjected to light diffusion processing such as prism processing in addition to embossing and blasting.

  On the other hand, the second light emitting portion of the light guide is located on the side surface or the side end surface of the vehicle door and is provided at a position observed from the outside, so that an LED lamp or the like located behind the light guide is visible. In order to prevent this, it is preferable to perform a surface treatment. In addition, for the purpose of diffusing emitted light in the same manner as the first light emitting unit, the second light emitting unit can be subjected to light diffusion processing such as prism processing in addition to embossing and blasting.

(holder)
In one embodiment of the invention, the lens and LED lamp are packaged by a holder. If the vehicle lighting device is packaged in this manner, it can be easily attached to the vehicle door. In addition, the structure of the attachment portion can be simplified. As a result, the installation space can be reduced, which contributes to an improvement in the degree of freedom in designing the vehicle door. Furthermore, versatility is improved by packaging. That is, it can be applied to various vehicles with the same configuration. Thereby, cost reduction is achieved. The structure of the holder is not particularly limited as long as the lens and the LED lamp can be held.
Hereinafter, based on an Example, this invention is demonstrated in detail.

  FIG. 1 shows a perspective view of a vehicle door 100 including a vehicle lighting device 1 according to an embodiment of the present invention, and FIG. 2 shows a partially enlarged view of a cross-sectional view taken along line AA of the vehicle door 100. As shown in FIG. 1, a vehicular illumination device 1 is provided at the lower edge of the vehicle door 100. A door pocket 101 is provided inside the vehicle above the vehicular lighting device 1. As shown in FIG. 2, the vehicular lighting device 1 includes an LED lamp 2 and a light guide 3. The LED lamp 2 is a surface mount type (SMD type) white LED lamp and is a top view type that emits light from the upper surface. The LED lamp 2 is mounted on the substrate 21 so that the optical axis 2 a is substantially perpendicular to the substrate 21. An opening 104 is provided at the lower edge of the inner plate 102 of the vehicle door 100, and the LED lamp 2 is positioned in the opening 104 so that the light emission side is downward (that is, toward the ground). The substrate 21 is fixed to the edge of 104 by screws 22. As a result, the substrate 21 is provided substantially parallel to the lower edge of the inner plate 102.

A concave portion 105 having substantially the same shape as the outer shape of the light guide 3 is provided immediately below the LED lamp 2 at the lower edge of the vehicle door 100, and the light guide 3 is attached thereto. The light guide 3 is made of polycarbonate resin and has a substantially flat plate shape with a thickness of about 5 mm, a width of about 35 mm, and a length of 45 mm. Of the upper surface of the light guide 3, the region facing the LED lamp 2 is the light incident surface 31, the flat plate surface on the ground side is the first light emitting portion 33, and the side surface indicated by reference numeral 34 is the second light emitting portion 34. Become. The first light emitting portion 33 is a smooth surface and is flush with the lower end surface of the inner plate 102. The second light emitting portion 34 is flush with the outer surface of the inner plate 102 and is subjected to lens cutting as a light diffusion process. The surface opposite to the second light emitting portion 34 is an inclined surface having an inclination angle α of about 40 °, and the interface serves as the reflecting portion 32. The reflection part 32 intersects the optical axis 2 a of the LED lamp 2.
The light guide 3 includes a ridge 35 on the upper corner on the second light emitting portion 34 side, and a ridge 36 on the upper side of the reflector 32. On the wall surface of the concave portion 105 of the inner plate 102, a groove 106 is provided at a position corresponding to the convex strip portion 35, and a groove 107 is provided at a position corresponding to the convex strip portion 36. The light guide 3 is positioned by fitting into the grooves 106 and 107. A double-sided tape 108 is provided between the upper surface of the light guide 3 and the recess 105, whereby the light guide 3 is fixed to the inner plate 102. Thus, the light guide 3 has a function as an outer lens by exposing the first light emitting portion 33 and the second light emitting portion 34.

Next, the illumination aspect of the vehicle lighting device 1 will be described. When the vehicle door 100 is opened, the LED lamp 2 is lit in conjunction with this. The light from the LED lamp 2 enters the light guide 3 from the light incident surface 32 of the light guide 3. Part of the incident light is guided in the light guide 3 to reach the first light emitting portion 33 and is emitted to the outside (see the arrow indicated by P in FIG. 2). The first light emitting unit 33 faces the ground, and this emitted light illuminates the ground. In other words, the vehicular illumination device 1 functions as a courtesy lamp that illuminates the feet of passengers. Thereby, the visibility of the step at the time of getting on and off increases, and safety improves. It also gives passengers a sense of security.
On the other hand, the other part of the incident light is guided in the light guide 3 and reaches the reflection part 32. The reflection unit 32 totally reflects the received incident light and advances the light to the second light emitting unit 34 side. The light reaching the second light emitting portion 34 is diffused by the second light emitting portion 34 and emitted to the outside. Since the second light emitting portion 34 is flush with the side surface of the inner plate of the vehicle door 100, the second light emitting portion 34 faces the rear of the vehicle when the vehicle door 100 is opened, and is emitted from the second light emitting portion 34. The diffused light is emitted toward the rear of the vehicle (see the arrow indicated by Q in FIG. 2). That is, the vehicle lighting device 1 functions as a display lamp (hereinafter, also referred to as “door open display lamp”) indicating that the vehicle door 100 is in an open state. Thereby, the safety | security with respect to a following vehicle etc. increases. In addition, since the 2nd light emission part 34 is embossed, when it observes from the outside, the LED lamp 2 etc. which are located in the inside of the light guide 3, or the back are not observed.
Thus, the vehicular lighting device 1 has a function as a courtesy lamp and a function as a door opening display lamp, thereby saving space and reducing the number of parts compared to the case where a lighting device is provided separately. Simplification of the mounting process and reduction of costs are realized. The optical axis 2 a of the LED lamp 2 intersects with the reflecting portion 32. Thereby, the balance of the light quantity which the light of LED lamp 2 advances to the reflection part 32, is reflected to the 2nd light emission part 34 side, and the light quantity which advances to the 1st light emission part 33 side becomes favorable. As a result, the function as the courtesy lamp and the function as the door opening display lamp are exhibited with a good balance. When the vehicle door 100 is closed, the LED lamp 2 is turned off in conjunction with this.

  As shown in FIG. 2, the substrate 21 is provided substantially parallel to the lower edge of the vehicle door 100 so that the optical axis 2 a of the LED lamp 2 is substantially perpendicular to the lower edge of the vehicle door 100. Thereby, compared with the case where the board | substrate 21 is made to incline with respect to the lower edge of the vehicle door 100, the whole apparatus is reduced in thickness and size. Further, the fact that the LED lamp 2 is an SMD type LED lamp also contributes to miniaturization of the apparatus. As a result, as shown in FIG. 1 and FIG. 2, the door pocket 101 and the vehicle lighting device 1 are set in a predetermined manner without providing a convex portion at the bottom of the door pocket 101 provided above the vehicle lighting device 1. It can be arranged at the position. This prevents a reduction in the storage capacity of the door pocket 101 and a reduction in usability. Thus, by setting it as the thin and small vehicle illuminating device 1, the freedom degree of design improves not only the door pocket 101 but another peripheral member.

Although the vehicle lighting device 1 is provided on the vehicle door 100 on the driver's seat side, the vehicle lighting device having the same configuration can be provided on the vehicle doors on the passenger seat side and the left and right rear seats.
Although the lighting state of the LED lamp 2 is interlocked with the opening and closing of the vehicle door 100, it is not limited to this. For example, it may be turned on immediately before the vehicle door is opened in conjunction with the door handle operation of the vehicle door 100. Alternatively, the vehicle door may be turned on for a predetermined time after the vehicle door is closed.

FIG. 3 shows a perspective view of a vehicular lighting device 50 according to another embodiment of the present invention, FIG. 4 shows a top perspective view of the exploded view, and FIG. 5 shows a bottom perspective view. Furthermore, the partial expanded view of the longitudinal cross-section of the vehicle door 500 provided with the illuminating device 50 for vehicles is shown in FIG. In addition, the same code | symbol is attached | subjected to the member same as the illuminating device 1 for vehicles, and the description is abbreviate | omitted.
The vehicle lighting device 50 is provided at the lower edge of the vehicle door 500 in the same manner as the vehicle lighting device 1. As shown in FIG. 3, the vehicular lighting device 50 includes a holder 510 and a lens 530 provided on the lower surface side thereof. Further, as shown in FIG. 4, the substrate 520 is sandwiched between the lens 530 and the holder 510. The substrate 520 is a long plate and includes two electrodes 521. As shown in FIG. 5, two LED lamps 2 are provided on the back surface side (lens 530 side) of the substrate 520. The two LED lamps 2 are arranged at a predetermined interval along the longitudinal direction of the substrate 520. The lens 530 is made of a colorless and transparent polycarbonate resin. The lens 530 includes four positioning protrusions 531 and two locking claws 532 on the inner surface thereof, and a part of the upper surface and an end surface are open on the side of the lens 530. A box-shaped electrode protection unit 540 is provided.

  The lens 530, the substrate 520, and the holder 510 are prepackaged as follows. First, the substrate 520 is placed on the positioning protrusion 531 and the locking claw 532 so that the LED lamp 2 faces the inner surface of the lens 530. FIG. 7 shows a side view for explaining a state where the substrate 520 is placed. As shown in FIG. 7, the positioning projection 531 is L-shaped, and includes a wall surface 531 a facing inward in the vertical direction on the upper surface of the lens 530, and a placement surface 531 b parallel to the upper surface of the lens 530. . The positioning protrusions 531 are arranged such that the distance between the opposing wall surfaces 531 a is substantially the same as the width of the substrate 520. The distance between the mounting surface 531 b and the upper surface of the lens 530 is slightly longer than the height of the LED lamp 2. Similarly, the locking claw 532 is L-shaped, and includes a wall surface 532 a that faces the upper surface of the lens 530 in the vertical direction and a mounting surface 532 b that is parallel to the upper surface of the lens 530. A claw portion 532c is provided on the outer wall surface in the vertical direction. Each positioning is performed so that the surface on which the LED lamp 2 is mounted is on the lens 530 side so that the wall surface 531a is in contact with the side surface of the substrate 520 and the electrode 521 is accommodated in the electrode protection unit 540. The substrate 520 is placed on the wall surface 531 b of the protrusion 531. As a result, the LED lamp 2 faces the predetermined position of the lens 530 without being in contact with the lens 530 and in the state of being close to the lens 530. Next, the holder 510 is attached to the lens 530 from the back side of the substrate 520, and the substrate 520 is sandwiched between the holder 510 and the lens 530. As shown in FIG. 5, the holder 510 has a box shape, and an opening 511 is provided on the lower surface (the surface on the lens 530 side). The shape of the opening 511 is a substantially rectangular shape that is slightly larger than the outer edge of the substrate 520. The four corners 511 a of the opening 511 come into contact with the outer wall surface of the positioning protrusion 531 at the corresponding position in a state where the four corners 511 a are attached to the lens 530. Two locking holes 512 are provided on the side wall of the holder 510. A claw 534 is provided on the side wall surface of the holder 510. The wall surface on the electrode protection part 540 side is cut out so as to be continuous with the electrode protection part 540. The holder 510 is placed on the lens 530 from the back side of the substrate 520 so that the corner 511a of the opening 511 of the holder 510 abuts on the outer wall surface of the positioning projection 531 at the corresponding position, and the claw 532c of the locking claw 532 is placed. Is locked in a locking hole 512 provided on the side wall of the holder 510, and the substrate 520 is sandwiched between the holder 510 and the lens 530 to be packaged. The packaged vehicle lighting device 50 is provided at the lower edge of the vehicle door 500 by engaging a claw 534 with a locking hole (not shown) provided in the inner plate 502 at the lower edge of the vehicle door 500. It is done.

  The vehicle lighting device 50 having such a configuration has the same effects as the vehicle lighting device 1. Further, as shown in FIG. 6, the LED lamp 2 is not directly attached to the inner plate 502 of the vehicle door 500, but is attached to the inner plate 502 via the holder 510. Since all the members constituting the vehicular lighting device 50 are attached by engaging the respective claws with the corresponding locking holes, screwing or the like is unnecessary. Thereby, attachment work becomes easy. Further, by packaging with the holder 510 as described above, the versatility of the member is increased and the member can be shared. This reduces manufacturing costs.

を満たすものであって、各界面８３１ａ〜８３１ｎは全反射面となっている。
同様に、図１１Ｂに示すＢ?Ｂ線位置においても、界面８３１ｄ、８３１ｅは入射部８３５から遠いものほど、下面８３３に近く、かつ、傾斜角が大きい。また、界面８３１ｄ、８３１ｅは上記関係式を満たすものであって、全反射面となっている。 FIG. 8 is an exploded perspective view of a vehicular lighting device 80 according to another embodiment of the present invention. Furthermore, the elements on larger scale of the longitudinal cross-section of the vehicle door 500 provided with the vehicle illuminating device 80 are shown in FIG. In addition, the same code | symbol is attached | subjected to the member same as the illuminating device 1 for vehicles, and the description is abbreviate | omitted.
The vehicle lighting device 80 includes a holder 510, a substrate 520, and a lens 830. The outer shape of the lens 830 is substantially the same as the outer shape of the lens 530 of the vehicular lighting device 50. The lens 830 includes a reflective portion 836, a first emitting portion 833, a second emitting portion 834, and an incident portion 835 that are equivalent to the lenses 3 and 530. Further, a plurality (17) of grooves 831 are provided on the upper surface 832 of the lens 830. FIG. 10 shows a partial top view of the lens 830, FIG. 11A shows a cross-sectional view taken along line AA in FIG. 10, and FIG. 11B shows a cross-sectional view taken along line BB in FIG. The grooves 831 are arranged in a lattice shape in plan view. In the A? A line position, the arrangement of the adjacent B? B line positions is shifted. That is, the grooves 831 are arranged alternately. In addition, the area | region shown with a dotted line and the oblique line in FIG. 10 shows the area | region (incident part 835) in which the light of the LED lamp 2 injects into the lens 830. FIG. As shown in FIG. 11A, the interfaces on the side wall surface of the incident portion 835 of the groove 831 are interfaces 831 a, 831 b, and 831 c in order from the side closer to the incident portion 31. An enlarged view of the interface 831a in FIG. 11A is shown in FIG. 11C. As shown in FIG. 11C, the interface 831a is tapered such that the distance from the incident portion 835 is closer to the lower surface 833 side of the lens 830. The width Wa of the interface 831a is about 2.4 mm, the depth Ha of the deepest portion is about 1.0 mm, and the angle (tilt angle) θa formed between the interface 831a and the lower surface 833 is about 20 °. The interface 831b located farther from the incident part 835 than the interface 831a is deeper at the deepest part than the interface 831a and is closer to the lower surface 833. The inclination angle of the interface 831b is about 30 °, which is larger than the inclination angle θa of the interface 831a. The width of the interface 831b is about 3.2 mm, which is larger than the width Wa of the interface 831a. Subsequently, the interface 831c located farther from the incident portion 835 than the interface 831b is closer to the lower surface 833 than the interface 831b. The interface 831c has a width of about 4.0 mm and an inclination angle of about 45 °, both of which are larger than the interface 831b. Thus, the groove 831 is formed deeper as the distance from the incident portion 835 increases. Thereby, the interfaces 831a, 831b, and 831c are closer to the lower surface 833 and the inclination angle is larger as the distance from the incident portion 835 increases. Furthermore, the interfaces 831a, 831b, and 831c all satisfy the following relational expression. That is, when the angles formed by the interfaces 831a to 831n of the groove 831 and the first emitting portion 833 are θa to θn and the refractive index of the lens 830 is n,

The interfaces 831a to 831n are total reflection surfaces.
Similarly, at the BB line position shown in FIG. 11B, the interfaces 831d and 831e that are farther from the incident portion 835 are closer to the lower surface 833 and have a larger inclination angle. The interfaces 831d and 831e satisfy the above relational expression and are total reflection surfaces.

  A lower surface 833 of the light guide plate 830 serves as a first emission portion 833. The first discharge portion 833 is a smooth surface and is exposed at the lower edge of the vehicle door 500. An end surface of the light guide plate 830 opposite to the incident portion 835 is a second emission portion 834. The second discharge part 834 is lens-cut. Further, as shown in FIG. 11A, the second discharge portion 834 has a curved surface that is gently curved so as to be continuous with the first discharge portion 833 in the longitudinal section.

The vehicular lighting device 80 also has the same effects as the vehicular lighting devices 1 and 50. Furthermore, as shown in FIG. 9, in the vehicle lighting device 80, a part of the light incident on the lens 830 from the incident portion 835 is reflected by the reflecting portion 836, and then guided to the lens 830 to be guided to It reaches the interfaces 831a to 831n. The plurality of interfaces 831a to 831n reflect the incident light to generate light in the direction of the lower surface 833. The reflected light is emitted to the outside from the first emission part 833 of the lens 830 (see the light indicated by a in FIG. 9). Lights indicated by b and c are reflected by the interfaces 831b and 831c, respectively, and emitted from the first emission unit 833 to the outside. Since the inclination angle of each of the interfaces 831a, 831b, and 831c increases as the distance from the incident portion 835 increases, the emitted light emitted from the first emitting portion 833 is a predetermined region between the vehicle door 500 and the vehicle main body (not shown). Irradiate (not shown). Such light distribution control illuminates the area between the vehicle door 500 and the vehicle main body (not shown) near the vehicle main body more brightly, thereby further increasing the visibility of the feet when getting on and off, and safety. Is further improved.
On the other hand, light (light indicated by d) that is not reflected by the plurality of interfaces 831a to 831n among the incident light reaches the second emission portion 834. Since the light reaching the second emission part 834 functions as a door opening display lamp, the safety for the following vehicle and the like is improved.

The following matters are disclosed.
(11) The vehicle illumination device according to any one of claims 1 to 5, further comprising a holder that holds the LED lamp and the light guide.
(12) The vehicle lighting device according to (11), wherein the holder and the light guide member sandwich the substrate and package.
(13) A plurality of protrusions having a vertical surface perpendicular to the upper surface of the light guide and a placement surface parallel to the upper surface of the light guide are provided on the upper surface of the light guide,
In the state where the substrate is placed on the light guide, the vertical surface is in contact with the side surface of the substrate, and the placement surface is in contact with the surface on which the LED lamp is mounted. (11) Or the illuminating device for vehicles as described in (12).
(14) A locking claw is provided on the upper surface of the light guide, and a hole for locking the locking claw is provided in the holder.
The locking claw has a vertical surface perpendicular to the upper surface of the light guide, and a placement surface parallel to the upper surface of the light guide,
In a state where the substrate is placed on the light guide, the vertical surface of the locking claw is in contact with a side surface of the substrate, and the mounting surface of the locking claw is mounted on the LED lamp of the substrate. The vehicle lighting device according to any one of (11) to (13), wherein the lighting device is in contact with a surface to be mounted.

  The vehicle lighting device of the present invention can be used for various vehicle doors.

The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications may be included in the present invention as long as those skilled in the art can easily conceive without departing from the description of the scope of claims.
The contents of papers, published patent gazettes, patent gazettes, and the like specified in this specification are incorporated by reference in their entirety.

It is a perspective view of the vehicle door 100 provided with the illuminating device 1 for vehicles which is an Example of this invention. It is a partially expanded view of the AA sectional view taken on the line in FIG. It is a perspective view of the illuminating device 50 for vehicles which is the other Example of this invention. 3 is a top perspective view of the vehicular lighting device 50. FIG. 3 is a bottom perspective view of the vehicular lighting device 50. FIG. FIG. 3 is a partially enlarged view of a longitudinal section of a vehicle door 500 including a vehicle lighting device 50. The side view for demonstrating the state which mounted the board | substrate 520 in the lens is shown. It is a perspective view of the illuminating device 80 for vehicles. A partially enlarged view of a longitudinal section of a vehicle door 500 including a vehicle lighting device 80 6 is a partial top view of a lens 830. FIG. 11A is a cross-sectional view taken along line AA in FIG. 10, and FIG. 11B is a cross-sectional view taken along line BB in FIG.

Explanation of symbols

100, 500 Vehicle door 1, 50, 80 Vehicle lighting device 2 LED lamp 21, 520 Substrate 22 Screw 3 Light guide 31 Light incident surface 32 Reflecting portion 33, 833 First light emitting portion 34, 834 Second light emitting portion 101 Door pocket 102 Inner plate 104 Opening 105 Recess 106, 107 Groove 108 Double-sided tape 530, 830 Lens

Claims (5)

A vehicle lighting device that is provided at a lower edge of a vehicle door and lights up in a state in which the vehicle door is opened,
An LED lamp mounted on a substrate such that a light emitting side is a lower edge side of the vehicle door;
Located on the light emission side of the LED lamp, located on the light incident surface facing the LED lamp, the first light emission portion located on the lower surface of the vehicle door, and the vehicle interior side or side end surface of the vehicle door. A light guide having a second light emitting portion and a reflecting portion that receives a part of the light incident from the light incident surface and reflects the light to the second light emitting portion side;
A vehicle lighting device comprising:   The vehicle lighting device according to claim 1, wherein the substrate is provided substantially parallel to a lower edge of the vehicle door.   The vehicular illumination device according to claim 1, wherein the reflection portion of the light guide is located on an optical axis of the LED lamp.   The vehicle lighting device according to any one of claims 1 to 3, wherein the second light emitting unit is subjected to a light diffusion process.   The vehicular illumination device according to any one of claims 1 to 4, wherein the LED lamp is an SMD type.

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