JP5255947B2 - Vehicle lamp - Google Patents

Description

  The present invention relates to a vehicular lamp. More specifically, the present invention relates to a technical field in which an optical body in which a lens unit and a reflector unit are integrally formed is provided to improve the positional accuracy between the lens unit and the reflector unit.

  As a vehicular lamp, for example, there is a type in which a light source and an inner lens are arranged inside a lamp outer casing constituted by an outer cover and a lamp housing.

  In the vehicular lamp having such a structure, the inner surface of the lamp housing is formed as a reflector part that reflects light emitted from the light source, and the light reflected by the lens part is passed through the inner lens from the outer cover. Some of them are emitted to the outside (see, for example, Patent Document 1).

JP 2007-123027 A

  However, in the conventional vehicular lamp described in Patent Document 1, an inner lens (lens portion), which is a separate member from the lamp housing, is attached to a lamp housing having an inner surface formed as a reflector portion. Therefore, the positional accuracy between the lens portion and the reflector portion depends on the mounting accuracy of the inner lens with respect to the lamp housing.

  Therefore, when the mounting accuracy of the inner lens with respect to the lamp housing is low, the positional accuracy between the lens portion and the reflector portion is lowered, and a desired light distribution pattern may not be obtained with respect to the light emitted from the light source.

  In addition, since the lamp housing having the reflector portion and the inner lens are separate members, the number of parts is correspondingly increased, and there is a risk that the assembly work for each part of the vehicular lamp will be complicated and the manufacturing cost will increase.

  Accordingly, an object of the vehicle lamp of the present invention is to overcome the above-described problems and improve the positional accuracy between the lens portion and the reflector portion.

In order to solve the above-described problems, a vehicular lamp is a vehicular lamp in which a light source and an optical body are disposed inside a lamp outer casing formed by a lamp housing and an outer cover. A reflector portion that reflects the reflected light and a lens portion that transmits and emits light and functions as an inner lens. The lens portion and the reflector portion are integrally formed, and the optical body is a light of the light source. A cross section in a vertical plane including the axis is formed in a substantially arc shape, and the light emitted from the light source is reflected by the reflector part, and the reflected light is refracted through the lens part and emitted to the outside. It is what is done.

Therefore, in the vehicular lamp, the light reflected by the reflector unit is transmitted through the lens unit formed integrally with the reflector unit .

The vehicular lamp according to the present invention is a vehicular lamp in which a light source and an optical body are disposed inside a lamp outer casing formed by a lamp housing and an outer cover, and the optical body reflects light emitted from the light source. A reflector portion that transmits light and a lens portion that emits light and functions as an inner lens. The lens portion and the reflector portion are integrally formed, and the optical body includes a vertical axis that includes the optical axis of the light source. It is formed in a substantially arc shape in a cross section in the plane, and the light emitted from the light source is reflected by the reflector part, and the reflected light is refracted through the lens part and emitted to the outside. And

  Therefore, the positional accuracy between the lens unit and the reflector unit is high, and a desired light distribution pattern can be obtained for the light emitted from the light source.

  In addition to reducing the number of parts, it is possible to simplify the assembling work for each part of the vehicle lamp and reduce the manufacturing cost.

In addition, since the optical body is formed in a substantially arc shape in a cross section in a vertical plane including the optical axis of the light source, the structure is simple and the moldability can be improved and facilitated.

In the invention described in claim 2 , since the light source is disposed on the support and positioned between the front and rear ends of the optical body, a structure in which light is emitted from the light source toward the reflector portion is easy. Can be configured.

  In the invention described in claim 4, since a part of the light emitted from the light source is guided inside the optical body to be emitted from the lens unit, the number of light sources is not increased. The light emission area can be increased.

  In the invention described in claim 5, a light source different from the light source is disposed inside the lamp outer casing, and the light emitted from the other light source is guided inside the optical body. Since light is emitted from the lens unit, the light emission area can be increased.

  The best mode for carrying out the vehicular lamp of the present invention will be described below with reference to the accompanying drawings.

  As shown in FIG. 1, the vehicular lamp 1 includes a lamp housing 2 having a recess opened forward, and an outer cover 3 that closes the opening surface of the lamp housing 2. The lamp housing 2 and the outer cover 3 constitute a lamp outer casing 4, and the inner space of the lamp outer casing 4 is formed as a lamp chamber 5.

Arrangement recesses 2a and 2a that are opened obliquely rearward are formed on the lower surface of the lamp housing 2 so as to be separated from each other in the left-right direction. The arrangement recesses 2a and 2a are closed by cover lenses 6 and 6, respectively.

  The lamp housing 2 is provided with a partition wall 2b that partitions the lamp chamber 5 on the left and right sides (see FIGS. 1 and 2).

  Light sources 7 and 7 are arranged in the arrangement recesses 2a and 2a of the lamp housing 2, respectively. As the light sources 7 and 7, for example, light emitting diodes are used, and the light sources 7 and 7 are mounted on supports 8 and 8 such as a circuit board, respectively.

  Optical bodies 9, 9 are arranged in the lamp chamber 5 so as to be separated from each other on the left and right sides (see FIGS. 1 and 2). As shown in FIG. 1, the optical body 9 is formed in an arc shape that protrudes substantially upward in a vertical section, and is formed of a transparent material such as an epoxy resin, an acrylic resin, or a polycarbonate resin.

  The optical body 9 has a front half portion provided as a lens portion 10, and a rear half portion other than the lens portion 10 provided as a reflector portion 11. Reflection processing, for example, aluminum deposition is performed on the inner surface of the reflector portion 11, and a portion where the aluminum deposition is performed is formed as a reflection surface 11a. In addition, the reflective surface 11a, such as aluminum vapor deposition, is not restricted to the inner surface of the reflector portion 11, and may be provided on the outer surface of the reflector portion 11, for example.

  The reflecting surface 11a of the reflector unit 11 is formed as a parabolic surface or an elliptical surface, and the light source 7 is disposed at the focal point or in the vicinity of the focal point.

  In the optical bodies 9 and 9, a part of the reflector portions 11 and 11 is attached to the rear end portion of the lamp housing 2 by appropriate means such as adhesion. In a state in which the optical bodies 9 and 9 are respectively attached to the rear end portions of the lamp housing 2, the light sources 7 and 7 are respectively positioned below substantially central portions in the front-rear direction of the optical bodies 9 and 9.

  In the vehicular lamp 1 configured as described above, when light is emitted from the light sources 7 and 7, the emitted light is transmitted through the cover lenses 6 and 6, respectively, and the reflector portion 11 of the optical bodies 9 and 9. , 11 head. The light traveling toward the reflectors 11 and 11 is reflected by the reflecting surfaces 11a and 11a of the reflectors 11 and 11, respectively, is transmitted through the lens units 10 and 10 of the optical bodies 9 and 9, and is emitted to the outside through the outer cover 3. The

  In addition, you may form the diffusion step which diffuses light in the optical bodies 9 and 9, for example. The diffusion step can be formed in the lens units 10 and 10 or the reflector units 11 and 11 or both the lens units 10 and 10 and the reflector units 11 and 11.

  As described above, in the vehicular lamp 1, the reflector unit 11 that reflects the light emitted from the light source 7 and the lens unit 10 that transmits and emits the light and functions as an inner lens are integrally formed. Therefore, the positional accuracy between the lens unit 10 and the reflector unit 11 is high, and a desired light distribution pattern can be obtained with respect to the light emitted from the light source 7, and can be applied to, for example, a tail lamp or a stop lamp. It is.

  In addition, since the lens unit 10 and the reflector unit 11 are provided by the same member, the number of components can be reduced, and the assembly work for each component of the vehicular lamp 1 can be simplified and the manufacturing cost can be reduced. Can be achieved.

  Furthermore, since the optical body 9 is formed in a substantially arc shape in a cross section in a vertical plane including the optical axis of the light source 7, the structure is simple, and the moldability can be improved and facilitated.

  In addition, since the light source 7 is mounted on the support 8 and the light source 7 is positioned between both front and rear ends of the optical body 9, a structure in which light is emitted from the light source 7 toward the reflector unit 11 can be easily configured. can do.

  In the above description, the configuration in which the light emitted from the light sources 7 and 7 is reflected by the reflectors 11 and 11 is described. In addition to this, the light emitted from the light source is reflected on the optical body 9 as follows. It is also possible to adopt a configuration in which light is guided and emitted inside (see FIGS. 3 and 4).

  For example, a part of the light emitted from the light source 7 can be guided and emitted inside the optical body 9 (see FIG. 3).

  An inclined total reflection surface 9 a is formed at the lower end portion of the rear end portion of the optical body 9.

  When light is emitted from the light source 7, a part of the light is reflected by the total reflection surface 9 a, enters the optical body 9, is guided from the reflector unit 11 toward the lens unit 10, and is emitted from the lens unit 10. The light is emitted to the outside through the outer cover 3.

  By guiding the light emitted from the light source 7 in the optical body 9 in this way, the light emitting area can be increased without increasing the number of the light sources 7.

  Further, for example, by arranging a light source 7A different from the light source 7, the emitted light can be guided and emitted inside the optical body 9 (see FIG. 4).

  In this case, the light source 7 and the light source 7A can be used as light sources for lamps having different functions. For example, the light source 7 is used as a light source for a so-called daytime running lamp that functions as a marker lamp other than nighttime. The light source 7A can be used as a light source for a so-called clearance lamp (vehicle width lamp) that functions as a night marker lamp.

  The light source 7 </ b> A is positioned below the lower end surface 9 b at the rear end portion of the optical body 9. When light is emitted from the light source 7A, the emitted light is incident on the optical body 9 from the lower end surface 9b, guided from the reflector portion 11 toward the lens portion 10, and emitted from the lens portion 10 to be emitted from the outer cover. 3 to the outside.

  As described above, the light emitting area can be increased by using the light source 7A different from the light source 7 to guide the light inside the optical body 9 to emit the light.

  Further, by using the light source 7 and the light source 7A as light sources of lamps having different functions, one lamp can be used as a lamp having a plurality of functions, and the functionality of the vehicular lamp 1 can be improved. it can.

  In the above, the example in which the two optical bodies 9 and 9 are arranged inside the lamp outer casing 4 is shown, but the number of the optical bodies 9 arranged inside the lamp outer casing 4 is limited to two. Is optional.

  The shapes and structures of the respective parts shown in the best mode for carrying out the invention described above are merely examples of the embodiments performed in practicing the present invention. The range should not be interpreted in a limited way.

FIG. 2 to FIG. 4 show the best mode of the vehicular lamp according to the present invention, and this figure is a schematic longitudinal sectional view of the vehicular lamp. It is a front view of the vehicle lamp which abbreviate | omits and shows an outer cover. It is a schematic sectional drawing which shows the example in which the light radiate | emitted from the light source is light-guided inside an optical body. It is a schematic sectional drawing which shows another example in which the light radiate | emitted from the light source is light-guided inside an optical body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp, 2 ... Lamp housing, 2a ... Arrangement recessed part, 3 ... Outer cover, 4 ... Outer casing, 7 ... Light source, 8 ... Support body, 9 ... Optical body, 10 ... Lens part, 11 ... Reflector part , Light source 7A

Claims (5)

A vehicular lamp in which a light source and an optical body are arranged inside a lamp outer casing formed by a lamp housing and an outer cover,
The optical body includes a reflector portion that reflects light emitted from the light source and a lens portion that transmits light and emits light and functions as an inner lens.
The lens part and the reflector part are integrally formed ,
The optical body is formed in a substantially arc shape in a cross section in a vertical plane including the optical axis of the light source,
The vehicular lamp characterized in that the light emitted from the light source is reflected by the reflector portion, and the reflected light is transmitted through the lens portion, refracted and emitted to the outside . The light source is disposed on a support and is positioned between both front and rear ends of the optical body,
2. The vehicular lamp according to claim 1, wherein an arrangement recess for a light source that is obliquely opened rearward is formed in the lamp housing . 3. The vehicular lamp according to claim 1 , wherein a plurality of the arrangement recesses are formed in the lamp housing so as to be separated from each other in the left-right direction, and are configured by a plurality of lamp units arranged side by side . 4. The vehicle according to claim 1, wherein a part of the light emitted from the light source is guided inside the optical body to be emitted from the lens unit. 5. Light fixture. A light source different from the light source is disposed inside the lamp outer casing,
4. The vehicular lamp according to claim 1, wherein light emitted from the another light source is guided inside the optical body to be emitted from a lens unit. 5. .

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