JP2008159458A - Lamp structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp structure capable of preventing leakage of light between lamps connected through a connection part. <P>SOLUTION: This lamp structure includes: a lamp 5 and a lamp 6 having LED light sources 10 and 11, and light guide members 30 and 31 formed of a transparent material, having the LED light sources 10 and 11 embedded therein, and emitting light from the LED light sources 10 and 11 toward a predetermined direction; and the connection part 32 formed of a transparent material, and integrally connecting the lamp 5 with the lamp 6. Light returning surfaces 30B and 31B returning light emitted from the LED light sources 10 and 11 of the lamp 5 and the lamp 6 toward the connection part 32 to the insides of the light guide members 30 and 31 are formed in the vicinities of the connection part 32 in the light guide members 30 and 31. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lamp structure including a plurality of lamps.

  The LED has a longer life than a conventional light bulb and has a low power consumption. Therefore, LEDs are being used in place of light bulbs in automobile lamps, such as side mirror lamps, tail lamps, brake lamps, rear turn signal lamps, side turn signal lamps, head lamps, fog lamps, and the like.

  As such a lamp, for example, a planar emission type LED that irradiates light in a direction perpendicular to the optical axis of the light emitting element, and at least one of the LEDs is provided at a predetermined position, and the planar surface from the LED A light guide member having a reflection surface that reflects emitted light and emits the light in a predetermined direction, and the light guide member emits the direct light from the LED and the reflected light from the reflection surface to the outside. A lamp having an exit surface has been proposed (Patent Document 1).

  In the lamp having the above-described configuration, since the LED is embedded in the light guide, it is compact as a whole and has high robustness. And since LED is a plane radiation | emission type | mold, by illuminating LED, the whole light guide member can be made to shine and visibility is high. Furthermore, by making the outer shape of the light guide member continuous with the vehicle body, it is easy to integrate the lamp with the vehicle body, which is preferable in terms of design.

  In recent years, combination lamps that integrate different types of lamps, such as tail lamps and rear turn signal lamps, tail lamps and brake lamps, brake lamps and rear turn signal lamps, are widely used as lamps provided at the rear end of vehicles. .

However, when a combination lamp is configured by simply integrating a plurality of lamps composed of a planar emission type LED and a light guide member via a connecting portion, when the LED of one of the lamps is turned on in the combination lamp There is a problem that light of the LED leaks to the other lamp.
JP 2004-319445 A

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a lamp structure capable of preventing or suppressing light leakage between lamps connected via a connecting portion.

  The invention according to claim 1 includes: one or a plurality of light sources; a light guide member that is formed of a transparent body, is provided with the light sources, and emits light from the light sources in a predetermined direction. A plurality of lamps, and a connection portion formed of a transparent body and integrally connecting the plurality of lamps, and in each lamp, the light emitted from the light source toward the connection portion is provided inside the light guide member. The light return surface to return to is formed in the vicinity of the connection part in the light guide member.

  In the lamp structure according to claim 1, each lamp is provided with a light return surface that returns light emitted toward the connecting portion to the inside of the light guide member of the lamp. The light emitted from the light source toward the connection portion hits the light return surface and is returned to the inside of the light guide member.

  According to a second aspect of the present invention, in the lamp structure according to the first aspect, the light return surface reflects the light from the light source toward the predetermined direction in the light guide member and the connection. It is a surface formed by providing the notch part which interrupts | blocks the optical path of the light radiate | emitted toward the said connection part from the said light source in the boundary part with a part.

  In the lamp structure according to claim 2, as described above, a notch portion that blocks an optical path of light emitted from the light source toward the connection portion is provided at a boundary portion between the reflection surface and the connection portion. Therefore, the light emitted from the light source toward the connection portion in each lamp is blocked by the surface formed by the cut portion and does not reach the connection portion, but is reflected toward the inside of the light guide member. .

  According to a third aspect of the present invention, in the lamp structure according to the second aspect, a recess is formed between two adjacent lamps adjacent to a connection portion connecting the two lamps, and the connection portion. The surface facing the recessed portion in (1) forms the bottom surface of the recessed portion, and the notch portion has a straight line connecting the center of the light source included in each lamp and the apex of the notched portion and the side wall surface of the recessed portion. It is formed so as to intersect.

  In the lamp structure according to claim 3, as described above, the straight line connecting the center of the light source included in each lamp and the apex of the cut portion intersects the side wall surface of the recessed portion. The part is formed. Thereby, among the light emitted from the light source, the light directed to the connection portion is blocked by the cut portion and directly returned to the inside of the light guide member or proceeds toward the side wall surface of the recessed portion, Since the light is reflected by the wall surface and returned to the inside of the light guide member, the light can be prevented from entering the connection portion.

  According to a fourth aspect of the present invention, in the lamp structure according to the third aspect of the present invention, a vehicle body fastening portion for fastening to a vehicle is formed at the bottom of the recessed portion.

  In the lamp structure according to the fourth aspect of the present invention, the lamp structure is fastened to the vehicle body at the vehicle body fastening portion provided at the bottom of the recessed portion, that is, the innermost portion.

  A fifth aspect of the present invention is the lamp structure according to any one of the first to fourth aspects, wherein the light source provided in the lamp is an LED light source.

  In the lamp structure according to claim 5, an LED light source is used as the light source. Therefore, power consumption and heat generation are small and the life is long.

  A sixth aspect of the present invention is the lamp structure according to any one of the first to fifth aspects, wherein the light guide member provided in the lamp is colored and transparent.

  In the lamp structure according to claim 6, since the light guide member is colored and transparent as described above, light having the same color as the color of the light guide member can be emitted in a predetermined direction.

  A seventh aspect of the present invention is the lamp structure according to any one of the first to sixth aspects, wherein each of the plurality of lamps is a rear turn signal lamp, a brake lamp, and a tail lamp. It is at least two kinds of lamps selected from the lamps, and the rear combination lamp is configured by being integrated at the connection portion.

  In the lamp structure according to claim 7, the light emitted from the light source of one lamp constituting the rear combination lamp toward the connection portion is reflected by a light return surface provided in the one lamp, and the one Returned to the light guide member of the lamp. Therefore, the light emitted from the one lamp does not leak to the other lamps constituting the rear combination lamp through the light guide member.

  The invention according to claim 8 is the lamp structure according to any one of claims 1 to 6, wherein one of the plurality of lamps is a headlamp, and the connection to the one lamp is performed. Another lamp connected through the unit is a fog lamp.

  In the lamp structure according to the eighth aspect, the light emitted from the light source toward the connection portion in the headlamp is reflected by the light return surface of the headlamp and returned to the light guide member. Therefore, the light emitted from the headlamp does not leak to the adjacent fog lamp through the light guide member. Similarly, there is no light leakage from the fog lamp to the headlamp.

  According to the first aspect of the present invention, as described above, in each lamp, the light emitted from the light source toward the connection portion hits the light return surface and returns to the inside of the light guide member. Further, in the plurality of lamps, light emitted from the light source toward the connection portion in one lamp can be prevented or suppressed from leaking toward the other lamp through the connection portion.

  According to the invention of claim 2, as described above, a notch is provided at the boundary between the light reflecting surface of the light guide member and the connection part, and the light return surface is formed by the notch. The shape and angle of the light return surface can be arbitrarily set.

  According to the invention of claim 3, the light emitted from the light source toward the bottom of the recessed portion, that is, the connection member as described above is directly returned to the light guide member by the light return surface, or by the light return surface. It is guided toward the side wall surface of the recessed portion, reflected by the side wall surface, and returned to the inside of the light guide member. This prevents entry into the connecting portion, and thus prevents or suppresses light leakage between the two lamps in the lamp structure having a recess formed between two adjacent lamps. it can.

  According to the invention of claim 4, since the lamp structure can be fastened to the vehicle body at the vehicle body fastening portion provided at the bottom of the recessed portion, that is, the innermost part, the lamp structure is attached to the vehicle body at the vehicle body fastening portion. After fastening, by inserting a plug-shaped member into the recessed portion, the vehicle body fastening portion can be made invisible from the outside. Therefore, a lamp structure that can be mounted on the vehicle in a nice manner is provided.

  According to the fifth aspect of the present invention, a lamp structure having a small power consumption and heat generation and a long lifetime can be obtained.

  According to the invention of claim 6, since the light of the same color as the color of the light guide member provided in the lamp can be emitted as described above, even when a white light source that emits white light is used as the light source, A lamp structure that emits colored light of a predetermined color such as orange, yellow, purple, and blue is provided.

  According to the invention of claim 7, in the rear combination lamp, it is possible to prevent light emitted from one lamp from leaking to another lamp through the light guide member. Therefore, a rear combination lamp without light leakage between the lamps is provided.

  According to the invention of claim 8, in the lamp structure in which the head lamp and the fog lamp of the vehicle are integrated, light leakage is prevented between the head lamp and the fog lamp. Therefore, when one of the headlamp and the fog lamp is turned on, light does not leak to the other.

1. Embodiment 1
Hereinafter, a rear combination lamp which is an example of the lamp structure of the present invention will be described. In FIG. 1 and below, FR indicates the front of the vehicle, RE indicates the rear of the vehicle, IN indicates the inner side in the vehicle width direction, and UP indicates the upper side of the vehicle.

  As shown in FIG. 1, a luggage door 3 that is a lid of a luggage room is provided at a rear end portion of a vehicle body 2 provided in the vehicle 1, and a pair of rear combination lamps 4 are provided on both sides thereof.

  The rear combination lamp 4 includes a rear turn signal lamp 5 located outside and a tail lamp 6 located inside the rear turn signal lamp 5. The tail lamp 6 also serves as a brake lamp. Between the rear turn signal lamp 5 and the tail lamp 6, a reflector 7 for reflecting light from the rear is provided.

  A rear bumper 8 is provided below the trunk lid 3 and the rear combination lamp 4.

  As shown in FIG. 2, in the rear combination lamp 4, the rear turn signal lamp 5 is formed by the light guide member 30 located on the outer side in the vehicle width direction and the LED light source 10 mounted on the front end surface of the light guide member 30. The tail lamp 6 is composed of the light guide member 31 located on the inner side in the vehicle width direction and the LED light source 11 disposed on the front end surface of the light guide member 31.

  The light guide members 30 and 31 are connected by a connection portion 32. The light guide members 30 and 31 and the connection portion 32 are preferably integrally formed of a transparent body such as transparent resin or glass, but the light guide members 30 and 31 formed as separate bodies are connected with a transparent body. You may connect by the part 32. FIG. Examples of a method for connecting the light guide members 30 and 31 and the connection portion 32 include adhesion, welding, and screwing. The light guide members 30 and 31 and the connection portion 32 may be colorless and transparent, or may be colored and transparent. When the light guide members 30 and 31 and the connection portion 32 are colored and transparent, it is preferable that the light guide member 30 is colored orange and the light guide member 31 is colored red. Examples of the transparent resin include resins usually used as organic glass, such as acrylic resin, polycarbonate resin, and heat-resistant polystyrene resin.

  As shown in FIG. 2, a recessed portion 33 having a U-shaped cross section as viewed from above and opened rearward is formed between the light guide members 30 and 31. The pair of side wall surfaces 33 </ b> A of the recessed portion 33 is processed by means such as plating or painting, and the light from the LED light sources 10 and 11 is returned to the inside of the light guide members 30 and 31 as shown in FIGS. 3 and 4. It is considered as a reflective surface. Further, the connection part 32 forms the bottom part of the recessed part 33. A bottom surface 33B is formed in the innermost portion of the recessed portion 33, that is, the front end portion so as to be orthogonal to the side wall surface 33A.

  A block-shaped fastening part 34 for fastening the rear combination lamp 4 to the vehicle body 2 is inserted into the recessed part 33. A fastening bolt 35 for fastening the rear combination lamp 4 to the vehicle body 2 is planted on the vehicle front side of the fastening part 34. The fastening bolt 35 corresponds to the vehicle body fastening portion in the present invention. The connecting portion 32 is provided with an insertion hole for inserting the fastening bolt 35. The reflector 7 is welded or bonded to the side of the fastening part 34 opposite to the side where the fastening bolt 35 is implanted, that is, the rear side of the vehicle 1.

  The front surfaces of the light guide members 30 and 31 are light reflecting surfaces 30A and 31A that reflect light from the LED light sources 10 and 11 backward.

  The LED light sources 10 and 11 are disposed at substantially central portions of the light reflecting surfaces 30 </ b> A and 31 </ b> A of the light guide members 30 and 31. In the example shown in FIG. 2, the LED light sources 10 and 11 are arranged in one row along the vehicle vertical direction, but may be arranged in two or more rows. Further, the number of the LED light sources 10 and 11 in each row may be one, but may be two or more. In particular, in the tail lamp 6, a part of the LED light source 11 is used as a tail lamp and is always lit during night driving, and the rest is lit as a brake lamp when the brake of the vehicle 1 is operated. The light sources 11 are arranged in two or more rows along the vertical direction, and the number of each row is preferably two or more.

  As shown in FIG. 2, cut portions 30C, 31C cut toward the rear of the vehicle are formed at the boundary portions between the light reflecting surfaces 30A, 31A of the light guide members 30, 31 and the connection portion 32. Light return surfaces 30B and 31B continuous to the light reflecting surfaces 30A and 31A are formed by the insertion portions 30C and 31C.

  As shown in FIGS. 3 and 4, the cut portions 30C and 31C are such that the straight line L connecting the centers of the LED light sources 10 and 11 and the innermost portions, that is, the apexes of the cut portions 30C and 31C is the bottom surface of the recessed portion 33. It is formed so as to pass the vehicle rear side from 33B, in other words, to intersect with the side wall surface 33A of the recessed portion 33. Accordingly, the light emitted from the LED light sources 10 and 11 toward the connection portion 32 strikes the light return surfaces 30B and 31B on the near side of the connection portion 32 as indicated by an arrow a, and the light guide members 30 and 31 Returned inside. The centers of the LED light sources 10 and 11 are defined as the center point of the upper surface 12C of the housing 12 described later.

  As shown in FIGS. 5 and 6, the LED light sources 10 and 11 have a single spherical type housing 12 that is detachably mounted on a socket (not shown) of the rear combination lamp 4 and is conventionally used. It can be mounted on a filament valve socket (not shown).

  As shown in FIG. 5, the housing 12 of the LED light sources 10 and 11 is formed in a disk shape with a central portion protruding in a columnar shape toward the front of the vehicle, a + terminal 14 is formed on the lower surface 12A, and a side surface 12B. A negative terminal 16 is formed to protrude. A disc-shaped upper surface 12C is formed at the upper end of the housing 12. In this embodiment, nine high-brightness LEDs 20 are arranged on the upper surface 12C as shown in FIG. 6, but the number of high-brightness LEDs 20 is not limited to nine. The housing 12 is covered with a lamp case 22 whose upper end is formed in a hemispherical or dome shape on the upper surface 12C. The lamp case 22 is made of a heat-resistant transparent resin. The lamp case 22 may be colorless and transparent, or may be colored and transparent.

  When the light guide members 30 and 31 on which the LED light sources 10 and 11 are disposed are colored and transparent, the lamp case 22 is preferably colorless and transparent, and the high-intensity LED 20 is preferably a white LED.

  On the other hand, when the light guide members 30 and 31 on which the LED light sources 10 and 11 are disposed are colorless and transparent, the lamp case 22 may be colorless and transparent or colored and transparent, but the lamp case 22 is colorless and transparent. In this case, the high-brightness LED 20 is preferably an orange LED that emits orange light in the LED light source 10 and a red LED that emits red light in the LED light source 11. In the light source 11, instead of using an orange LED as the high-brightness LED 20, a red LED and a green LED may be combined to emit light in orange as a whole. The lamp case 22 may have the same shape as a conventionally used lamp bulb lamp case.

  Thirteen transparent balls 26 are disposed inside the lamp case 22. These transparent spheres 26 are made of a spherical heat-resistant transparent resin, and diffuse light emitted from the high brightness LED 20. The transparent sphere 26 may be colorless and transparent, or may be colored and transparent. When the transparent sphere 26 is colored and transparent, when the lamp case 22 is colored and transparent, the color of the lamp case 22 and the high-intensity LED 20 When is an orange LED or a red LED, it is preferably colored in the same color as the color of the light from the high-intensity LED 20.

  If the number of transparent spheres 26 filled in the lamp case 22 of the LED light sources 10 and 11 is too small, a light divergence range from the LED light sources 10 and 11, that is, a light irradiation range is conventionally used. If the number of transparent spheres 26 is too small compared to the filament bulb, the amount of light divergence from the LED light sources 10 and 11, that is, the amount of light decreases. For this reason, in consideration of the refractive index and transmittance of the heat-resistant transparent resin to be used, the size of the transparent sphere 26 with respect to the volume of the lamp case 22 is set so that a desired light irradiation range and light quantity can be obtained. ing. Therefore, the number of transparent spheres 26 is not limited to 13 as well.

  Next, the operation of the rear combination lamp 4 according to the first embodiment will be described.

  The light (arrows in FIGS. 5 and 6) emitted from the plurality of high-intensity LEDs 20 disposed on the upper surface 12C of the housing 12 of the LED light sources 10 and 11 is diffused by the transparent sphere 26 and then diffused as shown in FIGS. As shown by arrows in FIG. 2, the light is emitted through the lamp case 22 toward the inside of the light guide members 30 and 31.

  Here, in the rear turn signal lamp 5, as described above, the straight line L connecting the center of the LED light source 10 and the apex of the cut portion 30C intersects the side wall surface 33A of the recessed portion 33 on the light guide member 30 side. ing.

  And the light radiated | emitted from the LED light source 10 is reflected in the vehicle back by the light reflection surface 30A or the light return surface 30B. Of the light, the light that passes on the straight line L or is closer to the light reflecting surface 30A than the straight line L gives up the tip of the light return surface 30B as shown by the arrow a in FIG. Reflected by the surface 30B and proceeds toward the side wall surface 33A of the recessed portion 33, reflected by the side wall surface 33A and returned to the inside of the light guide member 30, or reflected by the light return surface 30B and directly guided to the light guide member 30. Returned inside. Accordingly, since the light from the LED light source 10 does not enter the connection portion 32, the light can be prevented from entering the light guide member 31 of the tail lamp 6 through the connection portion 32.

  Similarly, also in the tail lamp 6, as described above, the straight line L connecting the center of the LED light source 11 and the innermost part of the cut portion 31C intersects the side wall surface 33A of the recessed portion 33 on the light guide member 31 side. .

  Therefore, the light emitted from the LED light source 11 is reflected rearward of the vehicle by the light reflecting surface 31A or the light returning surface 31B. Of the light, the light that passes on the straight line L or is closer to the light reflecting surface 31A than the straight line L gives up the tip of the light return surface 31B as shown by the arrow a in FIG. Reflected by the surface 31B and proceeds toward the side wall surface 33A of the recessed portion 33, reflected by the side wall surface 33A and returned to the inside of the light guide member 31, or reflected by the light return surface 31B and directly guided to the light guide member 31. Returned inside. Therefore, the light from the LED light source 11 also does not enter the connection portion 32, so that the light does not enter the light guide member 30 of the rear turn signal lamp 5 through the connection portion 32.

  As described above, in the rear combination lamp 4, the rear turn signal lamp 5 and the tail lamp 6 are connected to each other through the connection portion 32 made of a transparent resin. It is prevented or suppressed that light leaks between them.

2. Embodiment 2

  Hereinafter, a combination lamp in which a head lamp and a fog lamp are integrated as another example of the lamp structure of the present invention will be described.

  As shown in FIG. 7, an engine hood 13 is provided at a front end portion of a vehicle body 2 included in the vehicle 1, and a pair of fender panels 15 are provided on both sides thereof. A pair of combination lamps 40 are provided in front of the engine hood 13 and the fender panel 15 so as to sandwich the radiator grille 45, and further below, a front bumper 46 is provided.

  The combination lamp 40 includes a headlamp 42 positioned on the inner side in the vehicle width direction and a fog lamp 44 positioned on the outer side in the vehicle width direction. A clearance lamp 43 is provided between the head lamp 42 and the fog lamp 44. In FIG. 7, the clearance lamp 43 and the fog lamp 44 are omitted from the left combination lamp 40.

  As shown in FIG. 8, in the combination lamp 40, a headlamp 42 is formed by the light guide member 50 located on the inner side in the vehicle width direction and the LED light source 10 mounted on the rear end surface of the light guide member 50. A fog lamp 44 is constituted by the light guide member 51 located on the outer side in the direction and the LED light source 11 mounted on the rear end face of the light guide member 51.

  The light guide members 50 and 51 are connected by a connecting portion 52. The light guide members 50 and 51 and the connection portion 52 are preferably integrally formed of a transparent body such as transparent resin or glass, but the light guide members 50 and 51 formed as separate bodies are connected with a transparent body. You may connect by the part 52. FIG. Examples of a method for connecting the light guide members 50 and 51 and the connecting portion 52 include adhesion, welding, and screwing. The light guide members 50 and 51 and the connection portion 52 may be colorless and transparent, but the light guide member 51 constituting the fog lamp 44 may be colored and transparent colored yellow to orange.

  Examples of the transparent resin include resins usually used as organic glass, such as acrylic resin, polycarbonate resin, and heat-resistant polystyrene resin.

  Between the light guide members 50 and 51, as shown in FIGS. 8 to 10, a concave portion 53 that is U-shaped when viewed from above and is opened forward is formed. The side wall surface 53 </ b> A of the recessed portion 53 is processed by means such as plating or painting, and as shown in FIGS. 9 and 10, the reflecting surface that returns the light from the LED light sources 10 and 11 to the inside of the light guide members 50 and 51. It is said that. Further, the connection part 52 forms the bottom part of the recessed part 53. A bottom surface 53B is formed in the innermost portion of the recessed portion 53, that is, the rear end portion so as to be orthogonal to the side wall surface 53A.

  A clearance lamp 43 is inserted into the recessed portion 53. A fastening bolt 55 for fastening the combination lamp 40 to the vehicle body 2 is planted on the vehicle rear side of the clearance lamp 43. The connection portion 52 is provided with an insertion hole for inserting the fastening bolt 55. The fastening bolt 55 corresponds to the vehicle body fastening portion in the present invention. As shown in FIG. 8, the clearance lamp 43 is provided with an LED light source 43A and a transmission prism 43B that is provided at the front end and transmits light from the LED light source 43A.

  The rear end surfaces of the light guide members 50 and 51 are light reflecting surfaces 50A and 51A that reflect the light from the LED light sources 10 and 11 forward.

  The LED light sources 10 and 11 are disposed at substantially central portions of the light reflecting surfaces 50A and 51A of the light guide members 50 and 51, respectively. Although the LED light sources 10 and 11 are arranged in one row along the vehicle vertical direction in the example shown in FIG. 8, they may be arranged in two or more rows. Further, the number in the vertical direction of each row may be one, but may be two or more.

  At the boundary between the light reflecting surfaces 50A and 51A of the light guide members 50 and 51 and the connection portion 52, cut portions 50C and 51C cut toward the front of the vehicle are formed as shown in FIG. Light return surfaces 50B and 51B continuous with the light reflecting surfaces 50A and 51A are formed by the insertion portions 50C and 51C.

  As shown in FIGS. 9 and 10, the notches 50C and 51C are such that the straight line L ′ that connects the center of the LED light source 10 or 11 and the innermost part of the notches 50C and 51C, that is, the vertex, It is formed so as to pass the vehicle front side from the bottom surface 53B, in other words, to intersect with the side wall surface 53A of the recessed portion 53. Accordingly, the light emitted from the LED light sources 10 and 11 toward the connection portion 52 hits the light return surfaces 50B and 51B on the near side of the connection portion 52 as indicated by an arrow a, and the light guide members 50 and 51 Returned inside. The definition of the centers of the LED light sources 10 and 11 is as described in the first embodiment.

  The configuration of the LED light sources 10 and 11 is as described in the first embodiment. The definition of the centers of the LED light sources 10 and 11 is also the same as in the first embodiment.

  Next, the operation of the combination lamp 40 according to the second embodiment will be described.

  The light emitted from the LED light sources 10 and 11 is diffused by the transparent sphere 26 and then radiated toward the inside of the light guide members 50 and 51 through the lamp case 22.

  Here, in the headlamp 42, as described above, the straight line L ′ connecting the center of the LED light source 10 and the cut portion 50 </ b> C intersects the side wall surface 53 </ b> A of the recessed portion 53.

  Therefore, the light emitted from the LED light source 10 is reflected forward by the light reflecting surface 50A or the light returning surface 50B. Of the light, the light passing on the straight line L ′ or closer to the light reflecting surface 50A than the straight line L ′ gives up the tip of the light return surface 50B as indicated by an arrow a in FIG. Reflected by the light return surface 50B and proceeds toward the side wall surface 53A of the recessed portion 53, reflected by the side wall surface 53A and returned to the inside of the light guide member 50, or reflected by the light return surface 50B and directly guided. It is returned to the inside of the member 50. Therefore, since the light from the LED light source 10 does not enter the connection portion 52, the light can be prevented from entering the light guide member 51 of the fog lamp 44 through the connection portion 52.

  Similarly, in the fog lamp 44, as described above, the straight line L ′ connecting the center of the LED light source 11 and the tip of the cut portion 51C intersects the side wall surface 53A of the recessed portion 53. Of the emitted light, one that passes on the straight line L ′ or is closer to the light reflecting surface 51A than the straight line L ′ gives up the tip of the light return surface 51B as shown by an arrow a in FIG. Reflected by the light return surface 51B and proceeds toward the side wall surface 53A of the recessed portion 53, reflected by the side wall surface 53A and returned to the inside of the light guide member 51, or reflected by the light return surface 51B and guided by the light guide member 51. Returned directly inside. Therefore, since the light from the LED light source 11 does not enter the connection portion 52, the light does not enter the headlamp 42 through the connection portion 52.

  As described above, the combination lamp 40 also prevents light leakage between the head lamp 42 and the fog lamp 44 even though the head lamp 42 and the fog lamp 44 are connected via the connection portion 52 made of transparent resin. Is done.

  As described above, the example of the lamp structure using the LED light source as the light source has been described. However, the light source used in the lamp structure of the present invention is not limited to the LED light source, and conventionally, such as an incandescent bulb, a halogen lamp, and a metal halide lamp. It also includes light sources that have been used.

  In the first and second embodiments, the example of the lamp structure in which the light return surface is formed by providing the notch at the boundary between the light reflection surface and the connection portion of the light guide member has been described. A light return surface may be formed by embedding a light reflecting member such as a light reflecting film, a reflecting mirror, or a light reflecting plate in a boundary portion between the light member and the connection portion.

FIG. 1 is a perspective view of a vehicle equipped with a rear combination lamp according to Embodiment 1 as viewed obliquely from the rear. 2 is a cross-sectional plan view of the rear combination lamp on the left side of the vehicle shown in FIG. 1 cut along the line XX. FIG. 3 is an explanatory diagram showing how light emitted from the LED light source propagates in the light guide member in the turn signal lamp included in the rear combination lamp shown in FIG. 2. FIG. 4 is an explanatory diagram illustrating a state in which light emitted from the LED light source propagates in the light guide member in the tail lamp included in the rear combination lamp illustrated in FIG. 2. FIG. 5 is a plan sectional view of the LED light source used in Embodiments 1 and 2 cut along the line XX. FIG. 6 is a cross-sectional view showing a cross section of the LED light source shown in FIG. 5 cut along a vertical plane. FIG. 7 is a perspective view of a vehicle equipped with the combination lamp according to the second embodiment when viewed obliquely from the front. FIG. 8 is a plan sectional view of the left combination lamp shown in FIG. 7 cut along the line YY. FIG. 9 is an explanatory diagram showing how light emitted from the LED light source propagates through the light guide member in the headlamp included in the combination lamp shown in FIG. 8. FIG. 10 is an explanatory diagram illustrating a state in which light emitted from the LED light source propagates in the light guide member in the fog lamp included in the combination lamp illustrated in FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 3 Luggage door 4 Rear combination lamp 5 Rear turn signal lamp 6 Tail lamp 10 LED light source 11 LED light source 13 Engine hood 14 Terminal 15 Fender panel 16 Terminal 22 Lamp case 26 Transparent ball 30 Light guide member 30A Light reflecting surface 30B Light return Surface 30C Cut portion 31 Light guide member 31A Light reflecting surface 31B Light return surface 31C Cut portion 32 Connection portion 33 Recessed portion 33A Side wall surface 33B Bottom surface 40 Combination lamp 42 Head lamp 43 Clearance lamp 43A LED light source 43B Transmitting prism 44 Fog lamp 50 Light guide member 50A Light reflection surface 50B Light return surface 50C Cut portion 51 Light guide member 51A Light reflection surface 51B Light return surface 51C Cut portion 52 Connection portion 53 Recess portion 53A Side wall surface 53B Bottom surface

Claims (8)

A plurality of lamps having one or a plurality of light sources, and a light guide member that is formed of a transparent body, the light source is disposed, and a light guide member that emits light from the light sources in a predetermined direction;
A connecting portion formed of a transparent body and integrally connecting the plurality of lamps;
With
In each of the lamps, the lamp structure is characterized in that a light return surface that returns light emitted from the light source toward the connection portion to the inside of the light guide member is formed in the vicinity of the connection portion of the light guide member. body. The light return surface is formed of light emitted from the light source toward the connection portion at a boundary portion between the light reflection surface that reflects the light from the light source toward the predetermined direction in the light guide member and the connection portion. The lamp structure according to claim 1, wherein the lamp structure is a surface formed by providing a cut portion that blocks an optical path. A concave portion is formed between two adjacent lamps adjacent to a connecting portion connecting the two lamps, and a surface of the connecting portion facing the concave portion forms a bottom surface of the concave portion, and The lamp structure according to claim 2, wherein the cut portion is formed such that a straight line connecting a center of a light source included in each lamp and a vertex of the cut portion intersects a side wall surface of the recessed portion. . The lamp structure according to claim 3, wherein a body fastening portion for fastening to a vehicle is formed at a bottom portion of the recessed portion. The lamp structure according to claim 1, wherein the light source included in the lamp is an LED light source. The lamp structure according to claim 1, wherein the light guide member included in the lamp is colored and transparent.   Each of the plurality of lamps is provided at the rear end of the vehicle, and is at least two lamps selected from three lamps of a rear turn signal lamp, a brake lamp, and a tail lamp. The lamp structure according to any one of claims 1 to 6, wherein the lamp structure is integrated to form a rear combination lamp.   7. The lamp according to claim 1, wherein one of the plurality of lamps is a headlamp, and the other lamp connected to the one lamp via the connection portion is a fog lamp. Lamp structure.

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