JP2014067514A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting fixture in which the depth of the end portion of the lighting fixture is reduced as compared with conventional vehicular lighting fixtures, and the end portion of the lighting fixture emits light favorably.SOLUTION: A lid lamp 1 includes: a first LED 4 oriented to the left; a plate-like light guide lens 5 which is provided so as to be substantially perpendicular to the front-rear direction and whose right side end face faces the first LED 4; a first lamp unit 6 provided behind the light guide lens 5 and emitting light forward; and an inner lens 7 provided ahead of the light guide lens 5 and transmitting light emitted forward from the light guide lens 5 while diffusing the light. The light guide lens 5 includes: a light guide reflection part 52 provided on the left side of the light guide lens 5 and having a prism cut 52a that is provided on the rear face of the light guide reflection part 52 and reflects light incident on the light guide lens 5 from the first LED 4 forward; and a light transmitting part 53 provided adjacent to the light guide reflection part 52 on its right side and transmitting light from behind forward. The first lamp unit 6 is arranged behind the light transmitting part 53 among the light guide lens 5.

Description

  The present invention relates to a vehicular lamp.

  In various types of vehicle lamps mounted on a vehicle, the depth in the front-rear direction of the lamp body may be limited depending on the mounted vehicle part. In such a case, generally, the depth of the lamp body is configured to be compact by reflecting light emitted from a light source in a lateral direction forward by a reflector (see, for example, Patent Documents 1 and 2). .

JP 2005-78884 A JP 2003-31010 A

  However, the reflector (reflecting surface) that reflects light from the side forward must be arranged in a state inclined with respect to the front-rear direction, and requires a certain arrangement space in the front-rear direction. For this reason, depending on the vehicle part on which the lamp is mounted, it may be difficult to light the end of the lamp because the reflector cannot be disposed at a portion where the depth is particularly limited, such as an end of the lamp chamber.

For example, a lid lamp provided in a back door (including a trunk lid, a tailgate, etc.) that opens and closes a luggage compartment at the rear of the vehicle is a left-right direction when the rear combination lamp mounted on the rear side end of the vehicle body and the back door are closed. It is required to emit light integrally with the rear combination lamp.
However, the body part of the back door to which the lid lamp is attached is formed in a shape in which the end on the side of the vehicle protrudes toward the rear of the vehicle than the part on the center side of the vehicle due to problems in sheet metal processing, etc. Combined with the necessity of configuring the entire back door to have a constant thickness, the depth of the end of the lamp lamp located at the end of the back door on the side of the vehicle is remarkably limited. Therefore, it becomes difficult to arrange a reflector that requires a certain arrangement space in the front-rear direction at the end portion on the side of the vehicle in the lamp chamber of the lid lamp.
Therefore, in the conventional lamp configuration using the reflector, the end portion of the lid lamp on the side of the vehicle cannot be emitted, and as a result, the lid lamp cannot emit light integrally with the rear combination lamp.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a vehicular lamp that can suitably emit light from the end of the lamp while having a more compact depth at the end of the lamp as compared with the prior art. To do.

In order to solve the above problems, the present invention is a vehicle lamp,
A light source that emits light toward one of the orthogonal directions substantially orthogonal to the front-rear direction;
A plate-shaped light guide lens that is provided so as to be substantially orthogonal to the front-rear direction, and has the other end face in the orthogonal direction opposed to the light source;
A light emitting unit disposed behind the light guide lens and emitting light forward;
A diffusion lens that is disposed in front of the light guide lens and transmits the light emitted forward from the light guide lens while diffusing;
With
The light guide lens is
A light guide lens provided on one side of the light guide lens in the orthogonal direction and having a prism cut on the rear surface that reflects the light emitted from the light source and incident on the light guide lens from the end surface on the other side. A light reflecting portion;
A light transmissive portion that is provided adjacent to the light guide reflection portion on the other side in the orthogonal direction from the light guide reflection portion, and transmits light from the rear to the front;
Have
The light emitting unit is disposed behind the light transmitting part in the light guide lens.

  According to the present invention, the light emitted from the light source in one of the orthogonal directions enters the light guide lens from the other end face in the orthogonal direction and guides the light guide lens, and then the light guide lens. The light is reflected forward by the prism cut of the light guide reflection part provided on one side in the orthogonal direction, emitted from the front surface of the light guide reflection part, transmitted through the diffusion lens, and irradiated forward. Therefore, the reflector inclined with respect to the front-rear direction is disposed at the lamp end only by positioning the light guide reflection part of the light guide lens and the diffusion lens part in front of the light guide lens at the lamp end on one side of the lamp chamber. This lamp end can be illuminated without need. Therefore, it is possible to suitably emit light at the end of the lamp while making the depth of the end of the lamp compact compared to the conventional case where a reflector for emitting light at the end of the lamp needs to be disposed at the end of the lamp. it can.

  Further, as described above, the light emitted from the light source in one of the orthogonal directions is emitted forward from the light guide reflection portion of the light guide lens, while the light emitted forward from the light emitting unit is the light guide lens. Among them, the light is transmitted through a light transmitting part adjacent to the light guide reflection part and emitted forward. Since these lights are diffused by the diffusion lens disposed in front of the light guide lens and transmitted forward, the light emitted from the light guide reflection part and the light emitted from the light transmission part Are emitted forward in a more uniform manner. Therefore, unevenness of light emission between the respective parts due to the light emitted from the light sources and light paths different from each other can be reduced, and the diffusing lens can emit light more uniformly.

It is a rear view of a vehicle provided with the lid lamp in an embodiment. It is a front view of the rear lamp containing the lid lamp in an embodiment. It is sectional drawing in the III-III line of FIG. It is sectional drawing in the IV-IV line of FIG. It is sectional drawing in the VV line of FIG. It is a front view of the light guide lens in an embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a rear view of a vehicle C including a lid lamp 1 according to the present embodiment, FIG. 2 is a front view of a rear lamp 100 including the lid lamp 1, and FIGS. FIG. 6 is a cross-sectional view taken along line III-VV, and FIG. 6 is a front view of the light guide lens 5 provided in the lid lamp 1.
In the following description, “front”, “rear”, “left”, “right”, “upper”, and “lower” refer to the direction viewed from the lid lamp 1, that is, from the vehicle C, unless otherwise specified. The direction is the direction in which the front, back, left and right are reversed.

As shown in FIGS. 1 and 2, the lid lamp 1 is a vehicular lamp according to the present invention, and is provided on both right and left ends of a flip-up type back door D that opens and closes a cargo compartment at the rear of the main body of the vehicle C. It has been. Each lid lamp 1 is disposed so as to be adjacent to the rear combination lamp 101 provided at the rear side end of the vehicle C main body in the left-right direction when the back door D is closed, and the lid lamp 1 and the rear combination lamp 101 are A rear lamp 100 is configured.
The lid lamps 1 are provided at the left and right ends of the back door D, respectively. However, since the two left and right lid lamps 1 are symmetrical to each other, in the following description, the back door D Only the lid lamp 1 provided on the right side of the vehicle will be described, and the description of the back door D provided on the left side of the vehicle will be omitted.

  Specifically, as shown in FIGS. 3 to 5, the lid lamp 1 includes a housing 2 whose front surface is open and a transparent outer lens 3 that covers the front opening of the housing 2. The housing 2 is formed in a shape in which both left and right end portions protrude forward, and is fixed to the outer surface body Db of the back door D.

  The interior of the lamp chamber 10 formed by the housing 2 and the outer lens 3 is partitioned vertically into a lamp chamber lower portion 10a at the lower end portion and a lamp chamber upper portion 10b at the upper portion thereof. Three first LEDs (light emitting diodes) 4,... (See FIG. 6), a light guide lens 5, a first lamp unit 6, and an inner lens 7 are accommodated in the chamber upper part 10b.

  Among these, the three first LEDs 4,... Are light sources according to the present invention, and as shown in FIG. 3 and FIG. It is arranged at the right end in the lamp chamber upper part 10b. Each first LED 4 is arranged in the left direction so as to emit light toward the left.

  The light guide lens 5 is formed in a substantially parallelogram-like plate shape when viewed from the front, and the right end face faces the three first LEDs 4,... And the front-rear direction while tilting slightly to the left. Are arranged so as to be substantially orthogonal to each other. The light guide lens 5 includes an incident part 51 at the right end, a light guide reflection part 52 at a substantially left half, and a light transmitting part 53 between the incident part 51 and the light guide reflection part 52. Of these, the light guide reflection portion 52 is arranged in the lamp chamber upper portion 10b so as to be located at the left end portion in the lamp chamber upper portion 10b.

  The incident part 51 is a part for allowing the light emitted from the three first LEDs 4,... To enter the light guide lens 5, and corresponds to the three first LEDs 4,. It has incident surfaces 51a,. Each incident surface 51a is a right convex surface formed on a portion of the right end surface of the incident portion 51 facing the first LED 4 corresponding to the incident surface 51a, and leftward from the first LED 4. The emitted light is incident on the light guide lens 5 while being converted into parallel light substantially along the left-right direction.

In addition, two holes 511 and 512 penetrating in the front-rear direction are formed in the left part of the uppermost incident surface 51a in the incident part 51. One of the holes 511 is formed at a vertical position slightly above the vertical center of the uppermost entrance surface 51a, and its right side surface is at an angle of approximately 45 degrees toward the left. The first reflecting surface 51b is inclined upward. The other hole 512 is formed above the one hole 511, and its lower surface is a second reflecting surface 51c that is inclined upward at an angle of approximately 45 degrees toward the left. . By the first reflecting surface 51b and the second reflecting surface 51c, the light that has entered the light guide lens 5 from the uppermost incident surface 51a passes below the one hole 511 (first reflecting surface 51b). And those that proceed to the left and those that are reflected upward (total reflection) by the first reflection surface 51b and further reflected (total reflection) by the second reflection surface 51c and proceed to the left, and are lined up and down. Branches into two rows.
Therefore, in the incident part 51, the light radiate | emitted from three 1st LED4 and ... enters while being branched in two rows through the uppermost incident surface 51a, the 1st reflective surface 51b, and the 2nd reflective surface 51c. The light is incident from the lower two incident surfaces 51a and 51a, and enters the light guide lens 5 while being converted into four rows of parallel light arranged in the vertical direction.

  The light guide reflection part 52 is a part that reflects light guided to the left in the light guide lens 5 to the front, and has a plurality of substantially sawtooth prism cuts 52a for reflection on the rear surface. Have. More specifically, the plurality of prism cuts 52a,... Are emitted from the first LEDs 4,... And enter the light guide lens 5 from the incident surfaces 51a,. The light that has been shined is reflected forward. The light reflected forward by the plurality of prism cuts 52a,... Is emitted forward from the front surface of the light guide reflection unit 52.

  The light transmitting part 53 is a part provided adjacent to the light guide reflection part 52 on the right side of the light guide reflection part 52. The translucent portion 53 guides light emitted from the first LEDs 4... And incident into the light guide lens 5 from the incident surfaces 51 a of the incident portion 51 to the left, and as will be described later, The light emitted forward from the first lamp unit 6 provided in the front is transmitted forward as it is.

The first lamp unit 6 is a light emitting unit according to the present invention, and is disposed behind the light transmitting portion 53 of the light guide lens 5 as shown in FIGS. 3 and 4. Light is emitted forward. Specifically, the first lamp unit 6 includes a plurality of second LEDs 61,..., A condenser lens 62, and a reflector 63.
Among these, the plurality of second LEDs 61,... Are arranged at the upper end in the lamp chamber upper part 10b in a state of being arranged substantially along the left-right direction. Each second LED 61 is arranged downward so as to emit light downward.
The condenser lens 62 is disposed immediately below the plurality of second LEDs 61. The condensing lens 62 is formed in a Fresnel lens shape on the lower surface of the portion located below each of the second LEDs 61. The light emitted downward from the plurality of second LEDs 61,. The light is emitted downward while being parallel light.
The reflector 63 is disposed below the condenser lens 62, and has a plurality of reflecting portions 630,... Corresponding to the plurality of second LEDs 61,. The plurality of reflecting portions 630,... Are provided below the plurality of second LEDs 61,... Are substantially rearward in the left-right direction while being positioned slightly rearward on the left side following the inclination of the light guide lens 5. Side by side. The front surface of each reflecting portion 630 is formed in a stepped surface including four reflecting surfaces 630a,. These four reflecting surfaces 630a,... Form a step-like surface by being alternately connected in a vertical direction with step surfaces 630b,... doing. Each reflecting surface 630a is formed in an inclined surface shape that is inclined forward and downward, and reflects the light emitted downward from the second LED 61 and converted into parallel light by the condenser lens 62. Further, the four reflecting surfaces 630a,... Substantially correspond to the four rows of parallel light incident into the light guide lens 5 through the incident portion 51 in the vertical direction.

  The inner lens 7 is a diffusing lens according to the present invention, and is formed in a plate-like shape in front view substantially the same as the light guide lens 5 as shown in FIGS. It arrange | positions so that the front of the light guide lens 5 may be covered. The inner lens 7 has a configuration in which four diffuse transmission parts 71,... Elongated along the left-right direction are juxtaposed in the vertical direction with the light-shielding part 72 interposed therebetween. Each diffuse transmission part 71 has a plurality of hook-like flute cuts (not shown) along the vertical direction on the rear surface, and a plurality of hook-like flute cuts (not shown) along the left-right direction on the front surface. By these flute cuts, the light emitted forward from the rear light guide lens 5 is transmitted forward while slightly diffusing vertically and horizontally. In addition, the four diffuse transmission parts 71,... Substantially correspond to the four reflecting surfaces 630a,. Each of the light shielding portions 72 between the four diffuse transmission portions 71,... Has an aluminum film deposited on the front surface, and shields light from the rear without transmitting light. The inner lens 7 is supported by an extension 8 that surrounds the inner lens 7.

  In addition, as shown in FIG. 4, for example, a second lamp unit 9 that is turned on as a reverse lamp is accommodated inside the lamp chamber lower part 10 a of the lid lamp 1. Since the second lamp unit 9 is a lamp unit having a general configuration having a bulb 91, a detailed description thereof will be omitted.

Next, the light emission mode of the lid lamp 1 will be described.
When the lid lamp 1 receives, for example, a control command for performing a lighting operation as a taillight and a brake light from the vehicle main body, the three first LEDs 4,... And the plurality of second LEDs 61,. Light up.

  Among these, the light emitted from the three first LEDs 4,... Is guided as parallel light to the left through the three incident surfaces 51a,. The light enters the lens 5. At this time, the light incident from the uppermost incident surface 51a is branched into two rows of parallel light arranged in the vertical direction by the first reflecting surface 51b and the second reflecting surface 51c, and from the lower two incident surfaces 51a and 51a. Since the incident light becomes parallel light separated from each other, the light emitted from the three first LEDs 4,... Enters the light guide lens 5 as four rows of parallel light arranged in the vertical direction through the incident part 51. To do. The light that has entered the light guide lens 5 is guided to the left after passing through the translucent part 53 and then enters the light guide reflection part 52, and is reflected forward by the plurality of prism cuts 52 a of the light guide reflection part 52. Then, it is emitted forward from the front surface of the light guide reflection portion 52.

  On the other hand, the light emitted from the plurality of second LEDs 61,... Of the first lamp unit 6 is converted into parallel light downward through the condenser lens 62 as shown in FIG. .. Are reflected forward by the four reflecting surfaces 630a,..., And are converted into four parallel light beams in the forward direction. And this light permeate | transmits the light transmission part 53 of the light guide lens 5 as it is.

  In this way, the light emitted from the three first LEDs 4,... And the plurality of second LEDs 61,... Passes through the optical paths described above, as shown in FIGS. The light is emitted forward from the reflecting portion 52 and the light transmitting portion 53. All of these lights pass through the four diffuse transmission parts 71,... Forward through the inner lens 7 while being partially shielded by the respective light shielding parts 72 between the four diffuse transmission parts 71,. It becomes four clear lines of light lined up and down. At this time, the light emitted forward from the light guide reflection part 52 and the light emitted forward from the light transmission part 53 pass through each diffusion transmission part 71 of the inner lens 7, respectively. By diffusing vertically and horizontally by a plurality of flute cuts formed on the front surface and the rear surface of the portion 71, it is made uniform so as to reduce unevenness in light emission between the left and right portions of the inner lens 7 that transmits these lights. And emitted forward.

Then, the light emitted forward from the inner lens 7 is transmitted forward through the transparent outer lens 3.
In this way, as shown in FIG. 2, the lid lamp 1 causes the four diffuse transmission parts 71,... Of the inner lens 7 to emit light in the forward (rear direction) direction in the upper part 10b of the lamp chamber.

  The rear combination lamp 101 disposed on the vehicle side of the lid lamp 1 has a plurality of rows of light emitting portions 101a,... Provided so as to be continuous with the four diffuse transmission portions 71,. When the lid lamp 1 causes the inner lens 7 to emit light, the light emitting portions 101a,... Are made to emit light integrally with the four diffuse transmission portions 71,.

As described above, according to the lid lamp 1 of the present embodiment, the light emitted leftward from the first LEDs 4,... Enters the light guide lens 5 from the incident surfaces 51a,. After the light guide lens 5 is guided to the left, it is reflected forward by the prism cuts 52a of the light guide reflector 52 provided on the left side of the light guide lens 5 and the front surface of the light guide reflector 52. Is emitted through the inner lens 7 and irradiated forward. Therefore, the reflector inclined with respect to the front-rear direction can be obtained simply by positioning the light guide reflection portion 52 of the light guide lens 5 and the inner lens 7 portion in front of the light guide lens 5 at the left lamp end in the lamp chamber upper portion 10b. The lamp end can be illuminated without having to be placed at the end. Therefore, it is possible to suitably emit light at the end of the lamp while making the depth of the end of the lamp compact compared to the conventional case where a reflector for emitting light at the end of the lamp needs to be disposed at the end of the lamp. it can.
Thereby, the lamp end portion of the lid lamp 1 can be preferably caused to emit light even at the end portion on the side of the vehicle of the back door D, the depth of which is remarkably limited by the convenience of the vehicle body side. And the rear combination lamp 101 can emit light integrally without interposing a large gap therebetween.

  Further, the light emitted leftward from the first LEDs 4... Is emitted forward from the light guide reflection portion 52 of the light guide lens 5, while the light emitted forward from the first lamp unit 6 is guided. Of the optical lens 5, the light is transmitted through a light transmitting portion 53 adjacent to the light guide reflection portion 52 and emitted forward. These lights are diffused by the inner lens 7 disposed in front of the light guide lens 5 and transmitted forward, so that the light emitted from the light guide reflection part 52 and the light emitted from the light transmission part 53 are emitted. The emitted light is emitted forward in a more uniform manner. Accordingly, it is possible to reduce unevenness in light emission between the left and right parts by emitting light from different light sources and light paths, and to make the inner lens 7 emit light more uniformly.

  The light emitted from the uppermost one of the three first LEDs 4... Is incident on the light guide lens 5 while being converted into parallel light through the incident surface 51 a on the right end surface of the light guide lens 5. The one that travels to the left through the lower side than the first reflecting surface 51b, and the one that reflects upward on the first reflecting surface 51b and then further reflects on the second reflecting surface 51c and proceeds to the left. Branches into two rows arranged in the vertical direction. Therefore, a plurality of rows (a plurality of locations) can be made to emit light by one first LED 4, and as a result, the number of the first LEDs 4,.

  The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the lid lamp 1 has been described as an example of the vehicle lamp according to the present invention, but the present invention is widely applicable to vehicle lamps other than the lid lamp.

  Moreover, although the light guide reflection part 52 was provided in the left side part of the light guide lens 5, the said light guide reflection part 52 is one side of the orthogonal direction substantially orthogonal to the front-back direction among the light guide lenses 5. As long as it is on the side, it may be an upper part or a lower part. In this case, however, it is needless to say that the arrangement positions of the first LEDs 4,.

  Further, although the three first LEDs 4,... Have been described as the light source of the lid lamp 1, the light source of the vehicular lamp according to the present invention may be a light source other than a light emitting diode, and the number thereof is also particularly limited. Is not to be done.

  The first lamp unit 6 is not limited to the one provided with the second LED 61, the condenser lens 62, and the reflector 63, but is disposed behind the light guide lens 5 (the translucent portion 53) and emits light forward. For example, a valve or a lens may be provided.

  Further, the back door D provided with the lid lamp 1 may be a trunk lid, a tailgate, or the like as long as it is a luggage compartment door at the rear of the vehicle. Or double doors.

1 Lid lamp (vehicle lamp)
DESCRIPTION OF SYMBOLS 10 Lamp chamber 10b Lamp chamber upper part 2 Housing 3 Outer lens 4 1st LED (light source)
DESCRIPTION OF SYMBOLS 5 Light guide lens 51 Incident part 51a Incident surface 51b First reflective surface 51c Second reflective surface 52 Light guide reflective part 52a Prism cut 53 Translucent part 6 First lamp unit (light emitting unit)
61 Second LED
62 Condensing lens 63 Reflector 630a Reflecting surface 7 Inner lens (diffuse lens)
71 Diffusing and transmitting part 72 Light-shielding part 100 Rear lamp 101 Rear combination lamp 101a Light emitting part C Vehicle D Back door Db External body

Claims (4)

A light source that emits light toward one of the orthogonal directions substantially orthogonal to the front-rear direction;
A plate-shaped light guide lens that is provided so as to be substantially orthogonal to the front-rear direction, and has the other end face in the orthogonal direction opposed to the light source;
A light emitting unit disposed behind the light guide lens and emitting light forward;
A diffusion lens that is disposed in front of the light guide lens and transmits the light emitted forward from the light guide lens while diffusing;
With
The light guide lens is
A light guide lens provided on one side of the light guide lens in the orthogonal direction and having a prism cut on the rear surface that reflects the light emitted from the light source and incident on the light guide lens from the end surface on the other side. A light reflecting portion;
A light transmissive portion that is provided adjacent to the light guide reflection portion on the other side in the orthogonal direction from the light guide reflection portion, and transmits light from the rear to the front;
Have
The said light emitting unit is arrange | positioned behind the said translucent part among the said light guide lenses, The vehicle lamp characterized by the above-mentioned. A housing with an open front;
An outer lens provided to cover the front opening of the housing and defining a lamp chamber with the housing;
With
The said light guide lens is arrange | positioned so that the said light guide reflection part may be located in the edge part of the one side of the said orthogonal direction among the insides of the said lamp chamber. Light fixture. The light guide lens is
An incident surface that is formed on the other end surface and allows the light emitted from the light source to enter the light guide lens while making the light substantially parallel to the orthogonal direction;
One position in the orthogonal direction of the incident surface and one side in the second orthogonal direction from the center of the incident surface in the second orthogonal direction substantially orthogonal to both the front-rear direction and the orthogonal direction. A first reflecting surface that is provided at a position and reflects light incident into the light guide lens from the incident surface to one of the second orthogonal directions;
A second reflecting surface provided at one position of the first reflecting surface in the second orthogonal direction and reflecting light reflected by the first reflecting surface to one of the orthogonal directions;
The vehicular lamp according to claim 1, wherein the vehicular lamp is provided. The vehicle lamp is a lid lamp provided on a back door that opens and closes a luggage compartment at the rear of the vehicle,
The end of the lid lamp on one side in the orthogonal direction is a lamp end located at an end of the back door on the side of the vehicle. The vehicle lamp as described.

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