JP2011187318A - Lamp tool for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp tool capable of emitting light beams toward an arbitrary angle without having an exclusive lens cut fitted. <P>SOLUTION: Light beams L1 emitted from a bulb 2 of a light source 1 in a direction of a flange part 34 located diagonally to the front of the bulb 2 is propagated through the inside of a lamp room 41 and is incident at a given incident angle θ1 into a translucent incident face 35a formed at a root of the flange part 34 of a lens 30. The incident face 35a guides the light beams L1 to a first reflecting face 35b. The light beams L1 reaching the first reflecting face 35b are totally reflected at the first reflecting face 35b at a given reflecting angle θ2 and directed toward a second reflecting face 35c. The light beams L1 reaching the second reflecting face 35c are totally reflected at a given reflecting angle θ3 at the second reflecting face 35c, are guided again inside an outer periphery edge part 32 and are emitted from a light-emitting face 35d of the outer periphery edge part 32, which is an end part outside the lamp room 41 of the flange part 34. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicular lamp.

  For example, according to European standards, in general signal lights, a constant luminous intensity in the direction of 80 ° outside the lamp is required. As shown in FIG. 6, when the bulb has a structure that is recessed with respect to the lens, direct light from the bulb is blocked by the housing, and light cannot be emitted in the direction of 80 °. For this reason, as shown in FIGS. 7 and 8, a dedicated lens cut aiming at the outside 80 ° is installed, and the light distribution is controlled by the refraction of the lens cut.

JP 2008-251351 A

  If a dedicated lens cut is provided on the lens surface as described above, it is difficult to design. Further, when the bulb is lit, the dedicated lens cut controls the light beam in the direction of 80 °, so that when viewed from the front, the cut range becomes dark and the lighting feeling deteriorates.

  An object of this invention is to provide the lamp which can make a light ray radiate | emit to arbitrary angles, without providing an exclusive lens cut.

  The present invention relates to a vehicular lamp including a housing having an opening formed on a front surface, a cover lens mounted on the housing and forming a lamp chamber between the housing, and a light source disposed in the lamp chamber. A groove is formed around the opening, and the cover lens is a cover lens body that covers the opening, and a leg that is provided on the back surface of the cover lens body on the lamp chamber side and is inserted into the groove and fixed. And a light incident surface on which a part of light emitted from the light source is incident, at a corner portion between the cover lens body and the leg portion or a portion of the cover lens body closer to the vehicle center than the extension line of the groove portion And an end face facing the side of the vehicle, and light from the light source incident on the cover lens body from the light incident surface on the front surface and the back surface of the cover lens body opposite to the back surface, respectively. Reflected, vehicle For a vehicle, wherein at least one of a light incident surface, a back surface, a front surface, and an end surface is adjusted to emit light from the end surface in a predetermined direction on the side of the vehicle with respect to a reference axis extending in the rearward direction Provide lighting fixtures.

  The present invention relates to a vehicular lamp including a housing having an opening formed on a front surface, a cover lens mounted on the housing and forming a lamp chamber between the housing, and a light source disposed in the lamp chamber. A groove portion and a reflection surface are formed around the opening of the lens, and the cover lens is provided on the back surface of the cover lens body on the lamp chamber side and is inserted into the groove portion. Part of the light emitted from the light source, which is disposed at a portion closer to the vehicle center than the extension line of the groove portion of the cover lens body or the corner portion between the cover lens body and the leg portion. The light from the light source that has entered the cover lens body from the light incident surface is reflected by the surface of the cover lens body opposite to the back surface and is emitted from the back surface. Anti-housing At least one of the light incident surface, the front surface, the back surface, and the reflective surface of the housing is adjusted so that the light is reflected in a predetermined direction of the vehicle with respect to a reference axis extending in the vehicle longitudinal direction. A vehicle lamp is provided.

  In the present invention, the light from the light source that has entered the cover lens body from the light incident surface is reflected by the front surface and the back surface of the cover lens body opposite to the back surface, respectively, with respect to the reference axis extending in the vehicle front-rear direction. At least one of the light incident surface, the back surface, the front surface, and the end surface is adjusted so as to be emitted from the end surface in a predetermined direction on the side of the vehicle.

  Further, in the present invention, the light from the light source that has entered the cover lens body from the light incident surface is reflected on the surface of the cover lens body opposite to the back surface, emitted from the back surface, and on the reflective surface of the housing. At least one of the light incident surface, the front surface, the back surface, and the reflective surface of the housing is adjusted so as to be reflected in a predetermined direction of the vehicle with respect to a reference axis extending in the vehicle front-rear direction.

  That is, in the present invention, by adjusting a member that does not affect the appearance design of the lens, light can be emitted in the forward direction of the lamp at an arbitrary angle around the reference axis.

Overall perspective view of vehicular lamp Cross section of vehicular lamp The principal part enlarged view of the light distribution control part which concerns on 1st Embodiment. The principal part enlarged view of the light distribution control part which concerns on 2nd Embodiment. The principal part enlarged view of the light distribution control part which concerns on 3rd Embodiment. The figure which shows an example of a mode that a light ray is restrict | limited to a 80 degree direction in the conventional vehicle lamp. The figure which shows an example of the structure which enables a light ray to a 80 degree direction in the conventional vehicle lamp. The figure which shows an example of the lens cut which enables a light ray to a 80 degree direction in the conventional vehicle lamp

<First Embodiment>
FIG. 1 is an overall perspective view of a vehicular lamp according to a preferred first embodiment of the present invention. The vehicular lamp mainly includes a light source 1, a housing 20 to which the light source 1 is attached, and a lens 30 that fits into a front opening of the housing 20.

  FIG. 2 shows a sectional view of the vehicular lamp. As shown in FIG. 2, the light source 1 is a bulb with a socket, for example, and includes a wedge base bulb (bulb 2) and a wedge base bulb socket (socket 3).

  The housing 20 includes a bottom portion 21, a substantially cylindrical side wall portion 23 rising from the outer peripheral edge portion 22 of the bottom portion 21, and an open end portion 24 having a groove portion that opens toward the lower end in the vertical direction of the side wall portion 23. The reference axis X in the emission direction of the light source 1 is assumed to coincide with the axis extending in the front-rear direction of the vehicle. Furthermore, the bottom 21 is formed with a metal reflecting surface made of a metal film such as aluminum or silver.

  The lens 30 includes a lens portion 31 swelled in a spherical shape or an aspheric shape toward the front of the lamp, and a flange portion 34 extending substantially vertically upward from the outer peripheral edge portion 32 of the lens portion 31.

  The opening end portion 24 of the housing 20 and the flange portion 34 of the lens 30 are fitted via a sealing material (not shown), and the light source 1 is supported in the lamp chamber 41 formed by the housing 20 and the lens 30. The lens 30 is arranged in a state.

  FIG. 3 is an enlarged view of a main part of the light distribution control unit provided in the vicinity of the flange portion 34. The light distribution control unit includes an incident surface 35a, a first reflecting surface 35b, a second reflecting surface 35c, and a light emitting surface 35d.

  On the surface of the boundary portion between the base portion in the lamp chamber 41 of the flange portion 34 and the rear surface of the lens 30, an incident surface 35 a made of a triangular piece of light transmitting member is formed. The inclination of the incident surface 35a is set so as to form a predetermined incident angle θ1 with respect to the light beam L1 from the light source 1.

  A light beam L1 emitted from the bulb 2 of the light source 1 toward the flange portion 34 located obliquely forward of the bulb 2 propagates in the lamp chamber 41 and is formed at the base of the flange portion 34 of the lens 30. The light is incident on the translucent incident surface 35a at a predetermined incident angle θ1. The incident surface 35a refracts the light beam L1 at a predetermined angle or guides the light beam L1 to the first reflecting surface 35b on the back side of the outer peripheral edge 32 of the lens 30 (inside the lamp chamber 41) without being refracted. The incident angle of the light ray L1 on the first reflecting surface 35b is equal to or greater than the critical angle of the first reflecting surface 35b.

  The light beam L1 that has reached the first reflecting surface 35b is totally reflected at the first reflecting surface 35b at a predetermined reflection angle θ2, guided again through the outer peripheral edge 32, and outside the light source 41 outside the lamp chamber 41 of the flange 34. The second reflective surface 35c on the back side of the rear surface of the peripheral edge 32 is directed. The incident angle of the light ray L1 on the second reflecting surface 35c is equal to or greater than the critical angle of the second reflecting surface 35c.

  The light beam L1 that has reached the second reflecting surface 35c is totally reflected at the second reflecting surface 35c at a predetermined reflection angle θ3, is again guided through the outer peripheral edge portion 32, and hits the end of the flange portion 34 outside the lamp chamber 41. The light is emitted from the light emitting surface 35 d of the outer peripheral edge 32. The brightness of the emitted light beam L1 is preferably about 0.05 candela.

  Alternatively, the rear surface of the lens 30 is subjected to mirror treatment such as silver coating or aluminum vapor deposition to form the second reflecting surface 35c, and the light beam L1 reaching the second reflecting surface 35c is reflected and emitted from the light emitting surface 35d. You may comprise.

  The exit angle from the light exit surface 35d is set to a desired value, for example, 45 ° to 80 °, by adjusting the incident angle θ1 and / or the reflection angle θ3 that do not affect the appearance design of the lens 30, particularly θ1 to θ3. A desired value within the range can be determined. Therefore, the light L1 can be emitted from the flange portion 34 of the lens 30 at an arbitrary angle around the reference axis X in the forward direction of the lamp.

  The incident angle θ1 and / or the reflection angle θ3 are adjusted by mutually adjusting the position, angle, surface shape, and the like of the incident surface 35a, the first reflecting surface 35b, the second reflecting surface 35c, and the light emitting surface 35d. it can.

Second Embodiment
The shape of the incident surface is not limited to that shown in FIG. FIG. 4 shows a light distribution control unit according to the second embodiment.

  The incident surface 36a is provided on the surface inside the lamp chamber 41 of the flange portion 34, which is a portion extending further below the lower end of the side wall portion 23, and the area thereof is larger than the incident surface 35a of the first embodiment, More light can be incident. The incident angle changing unit 36 refracts the light ray L2 incident on the incident surface 36a at the incident angle φ0 at a predetermined refraction angle φ1 and guides it to the first reflecting surface 36b.

  The first reflecting surface 36b is the same as the first reflecting surface 35b.

  The light beam L2 that has reached the first reflecting surface 36b is totally reflected at the first reflecting surface 36b at a predetermined reflection angle φ2, is guided again in the outer peripheral edge portion 32, and hits the foot portion outside the lamp chamber 41 of the flange portion 34. It goes to the second reflecting surface 36c of the outer peripheral edge 32.

  The light beam L2 reaching the second reflecting surface 36c is totally reflected or reflected by the second reflecting surface 35c at a predetermined reflection angle φ3, and is guided again in the outer peripheral edge 32, so that the end of the flange portion 34 outside the lamp chamber 41 is obtained. The light is emitted from the light emitting surface 36d of the outer peripheral edge 32 corresponding to the portion.

  Here, if φ0> φ1 in the incident angle changing unit 36, the reflection angle at the first reflection surface 36b is smaller than that in the first embodiment, and the emission angle from the light emission surface 35d is increased. Conversely, if φ0 <φ1 in the incident angle changing unit 36, the reflection angle at the first reflection surface 36b is larger than that in the first embodiment, and the emission angle from the light emission surface 35d is reduced.

<Third Embodiment>
The configurations of the second reflecting surface and the light emitting surface are not limited to those shown in FIGS. FIG. 5 shows a configuration of a light distribution control unit according to the third embodiment. The light distribution control unit includes an incident surface 37a, a first reflecting surface 37b, a light emitting surface 37c, and a reflecting surface 37d.

  The incident surface 37a and the first reflecting surface 37b are the same as the incident surface 35a and the first reflecting surface 35b of the first embodiment. The incident surface 37a may be the same as the incident surface 36a (FIG. 4) of the second embodiment.

  The light emitting surface 37c is located on the back surface of the outer peripheral edge portion 32 corresponding to the surface of the foot portion outside the lamp chamber 41 of the flange portion 34, and emits the light beam L3 guided from the first reflecting surface 37b toward the reflecting surface 37d. .

  The reflective surface 37d is formed by a mirror treatment such as silver coating or aluminum deposition on the outer lower end portion of the open end 24 of the housing 20, reflects the light beam L3 emitted from the light emitting surface 37c, and emits it to the atmospheric space. To do.

<Fourth embodiment>
A known lens cut may be provided on the above-described light exit surfaces 35d, 36d, and 37c to diffuse or collect the light rays. The present invention is applicable not only to vehicle lamps such as four-wheeled vehicles and two-wheeled vehicles, but also to signal lights in general.

1: Light source, 20: Housing, 30: Lens, 35a / 36a: Incident surface, 35b / 36b: First reflecting surface, 35c / 36c: Second reflecting surface, 35d / 36d: Light emitting surface

Claims (2)

In a vehicle lamp comprising: a housing having an opening formed on a front surface; a cover lens that is mounted on the housing and forms a lamp chamber between the housing; and a light source disposed in the lamp chamber;
A groove is formed around the opening of the housing,
The cover lens includes a cover lens main body that covers the opening, a leg portion that is provided on the back surface of the cover lens main body on the lamp chamber side, is inserted into the groove, and is fixed, and the cover lens main body and the leg A light incident surface on which a part of the light emitted from the light source is incident, and a vehicle side. And an end face facing toward the
Light from the light source that has entered the cover lens body from the light incident surface is reflected by the surface opposite to the back surface of the cover lens body and the back surface, and extends in the vehicle front-rear direction. And at least one of the light incident surface, the back surface, the front surface, and the end surface is adjusted so that the light exits from the end surface in a predetermined direction on the side of the vehicle. . In a vehicle lamp comprising: a housing having an opening formed on a front surface; a cover lens that is mounted on the housing and forms a lamp chamber between the housing; and a light source disposed in the lamp chamber;
A groove and a reflective surface are formed around the opening of the housing.
The cover lens includes a cover lens main body that covers the opening, a leg portion that is provided on the back surface of the cover lens main body on the lamp chamber side, is inserted into the groove, and is fixed, and the cover lens main body and the leg A light incident surface on which a part of light emitted from the light source is incident, and is disposed at a portion closer to the vehicle center than an extension line of the groove portion of the cover lens body. And
Light from the light source that has entered the cover lens body from the light incident surface is reflected on the surface of the cover lens body opposite to the back surface, is emitted from the back surface, and is reflected on the reflective surface of the housing. In addition, at least one of the light incident surface, the front surface, the back surface, and the reflective surface of the housing is adjusted so as to be reflected in a predetermined direction of the vehicle with respect to a reference axis extending in the vehicle longitudinal direction. A vehicular lamp characterized by the above.

Images