JP2016157568A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently suppress generation of dazzling light and to secure a favorable irradiation state of light radiated toward the outside.SOLUTION: A vehicular lighting fixture includes: a light source 15; a reflector 9 having a reflection surface 9a for reflecting light emitted from the light source 15; and a shade having a light shielding part for shielding at least one part of the light going toward a front surface 9b located in front of the reflection surface. At the shade, a transmission hole 19a is formed in which one part of the light emitted from the light source and going toward the outside is transmitted. Thereby, at least one part of the light going toward the front side is shielded by the light shielding part, and also one part of the light is transmitted in the transmission hole and going toward the outside, so that generation of dazzling light can be sufficiently suppressed by the light shielding part, and by the light being transmitted in the transmission hole, a favorable irradiation state of the light radiated toward the outside can be secured.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technical field of a vehicular lamp having a reflector that reflects light emitted from a light source.

No. 6-50881

  In a vehicle lamp, for example, a light source and a reflector are arranged inside a lamp outer casing constituted by a cover and a lamp housing, and a part of the light emitted from the light source is reflected by the reflector and irradiated to the outside. There are types.

  Such a vehicular lamp includes a reflector in which a first surface and a second surface having different functions are formed (see, for example, Patent Document 1). For example, the first surface is formed as a light distribution forming surface for reflecting light emitted from the light source to form a light distribution pattern, and the second surface does not contribute to the formation of the light distribution pattern, for example. It is formed as a non-light distribution forming surface.

  A part of the light emitted from the light source is reflected on the first surface to be emitted to the outside as light forming a light distribution pattern. Another part of the light emitted from the light source is also directed to the second surface and is incident on the second surface.

  In such a type of vehicle lamp, there is a need for means for preventing light incident on the second surface from being reflected and becoming dazzling light with respect to the oncoming vehicle and the preceding vehicle. In the described vehicle lamp, irregular reflection grooves are formed on the second surface by knurling or the like. Since the light emitted from the light source and incident on the second surface is diffusely reflected by the irregular reflection groove, it is difficult to generate illusion light.

  By the way, when the irregular reflection groove is formed on the second surface as described above, depending on the reflection direction of the light irregularly reflected by the irregular reflection groove, the irregularly reflected light may be directed in the direction in which the oncoming vehicle or the preceding vehicle exists. Therefore, there is a possibility that the generation of illusion light cannot be sufficiently suppressed.

  On the other hand, in a vehicular lamp, it is also necessary to secure a good irradiation state of light emitted toward the outside to improve visibility and safety.

  Therefore, an object of the vehicle lamp of the present invention is to overcome the above-described problems, sufficiently suppress generation of dazzling light, and ensure a good irradiation state of light emitted toward the outside.

  First, a vehicular lamp according to the present invention includes at least one of a light source, a reflector having a reflecting surface that reflects light emitted from the light source, and a light toward a front surface positioned on the front side of the reflecting surface. A shade having a light-shielding portion that shields the portion, and the shade is formed with a transmission hole through which a part of the light emitted from the light source and going to the outside is transmitted.

  Thereby, at least a part of the light traveling toward the front surface is shielded by the light shielding portion, and a part of the light is transmitted through the transmission hole and travels to the outside.

  2ndly, in the vehicle lamp which concerns on above-described this invention, it is desirable for the said light-shielding part to be located in the area | region which connects the said light source and the said front surface.

  Thereby, it becomes possible to shield the light which goes to a front surface most efficiently.

  Thirdly, in the vehicle lamp according to the present invention described above, an arrangement member in which the light source is arranged is provided, the shade is attached to the arrangement member, and the transmission hole and the light shielding portion are positioned in the front and rear. It is desirable.

  As a result, the transmission hole and the light-shielding portion, which are both necessary for the shade, are positioned close to each other, and the shade becomes the minimum size.

  Fourthly, in the above-described vehicular lamp according to the present invention, a lamp outer casing constituted by a lamp body having an opening and a cover for closing the opening is provided, and the light source is disposed inside the lamp outer casing. It is preferable that a heat sink that releases heat generated when light is emitted is provided, and a part of the heat sink is positioned to face the inner surface of the cover.

  Thereby, the heat released from the arrangement member is transmitted to the cover, and it becomes possible to melt snow and ice attached to the surface of the cover.

Fifth, in the vehicular lamp according to the present invention described above, it is preferable that the light source is a semiconductor light emitting element, and the luminance of the light emitting unit is 30 cd / mm ² or more.

  Thereby, the light source has sufficient luminance to form a good light distribution pattern.

  According to the present invention, at least part of the light traveling toward the front surface is shielded by the light shielding part, and part of the light is transmitted through the transmission hole and travels to the outside. In addition, it is possible to ensure a good irradiation state of the light irradiated toward the outside by transmitting the light through the transmission hole.

FIG. 2 to FIG. 5 show an embodiment of the present invention, which is a longitudinal sectional view of a vehicular lamp. It is a front view of the vehicle lamp shown with the cover removed. It is a perspective view of an arrangement member. It is a perspective view of a shade. It is a longitudinal cross-sectional view of the vehicle lamp which shows the example by which the front surface was formed in the extension.

  EMBODIMENT OF THE INVENTION Below, the form for implementing the vehicle lamp of this invention is demonstrated with reference to an accompanying drawing.

  In the embodiment shown below, the vehicular lamp of the present invention is applied to a headlamp. The scope of application of the present invention is not limited to headlamps, and clearance lamps, tail lamps, turn signal lamps, stop lamps, daytime running lamps, cornering lamps, hazard lamps, position lamps, back lamps, fog lamps, etc. It can be widely applied to various vehicle lamps such as a combination lamp which is a combination of the above.

  The vehicular lamp 1 is attached and arranged at both left and right ends of the front end of the vehicle body.

  The vehicular lamp 1 includes a lamp housing 2 and a cover 3 (see FIG. 1). The lamp housing 2 and the 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.

  The lamp housing 2 is made of a metal material having high thermal conductivity such as aluminum, and has an opening 2a at the front end. The lamp housing 2 has an opening 2 a closed by a cover 3. An attachment surface portion 2b is provided at an upper end portion near the rear end of the lamp housing 2, and the attachment surface portion 2b is formed in a shape extending in the left and right direction and facing in the front-rear direction. A through hole 2c penetrating in the front-rear direction is formed at the rear end of the lamp housing 2, and a back cover 6 for closing the through hole 2c is attached to the lamp housing 2.

  A reflector 7 and an arrangement member 8 are arranged in the lamp chamber 5 (see FIGS. 1 and 2).

  The reflector 7 is formed by integrally forming a concave functional surface portion 9 opening forward and upward and a closing surface portion 10 projecting outward from the outer peripheral edge of the functional surface portion 9.

  In the functional surface portion 9, a reflective surface 9a is formed at a portion of the lower end portion excluding the front end portion, and a front surface 9b is formed at a position continuous with the front edge of the reflective surface 9a. The reflection surface 9a is formed as a light distribution formation surface for forming a light distribution pattern, for example, and the front surface 9b is formed as a non-light distribution formation surface that does not contribute to the formation of the light distribution pattern, for example. The front surface 9b faces upward and is formed in a minute uneven shape by knurling or the like. Therefore, the light incident on the front surface 9b is diffused by the uneven shape.

  The blocking surface portion 10 protrudes outward from the portion excluding the upper edge of the functional surface portion 9 and faces the front-rear direction. In a state where the reflector 7 is disposed in the lamp chamber 5, the rear side portion of the closing surface portion 10 is closed by the closing surface portion 10.

  The arrangement member 8 is formed of a metal material having high thermal conductivity such as aluminum, and is provided as a heat sink that transmits and releases heat. Arrangement member 8 has arrangement part 11, fin formation part 12, and to-be-attached surface part 13 (refer to Drawing 1 and Drawing 3).

  The arrangement part 11 is formed in a shape in which the length of the front end in the left-right direction is longer than the length of the rear end in the left-right direction, and the width in the left-right direction increases as going backward. The first fins 11a, 11a,... Are provided on the upper surface side of the central portion in the left-right direction of the arrangement portion 11, and the first fins 11a, 11a,. ing. Two positioning pins (not shown) protruding downward are provided on the lower surface of the arrangement portion 11 so as to be separated from each other in the left and right directions. The arrangement part 11 is provided as a protruding part 11b in which a part excluding the left and right end parts protrudes downward with respect to the left and right end parts. A screw hole 11c opened downward is formed in the protruding portion 11b.

  The fin forming portion 12 is provided continuously at the front end of the placement portion 11 and is formed in a shape extending left and right. On the front side of the fin forming portion 12, second fins 12a, 12a,. The front ends of the first fins 11a, 11a,. As for the fin formation part 12, 2nd fin 12a, 12a, ... is located facing the inner surface of the cover 3. As shown in FIG.

  The mounted surface portion 13 is continuously provided at the rear end of the arrangement portion 11 and is formed in a plate shape extending in the left and right directions and facing in the front-rear direction. The rear surface of the mounted surface portion 13 is formed as a contact surface 13a. The rear end of the first fins 11a, 11a,...

  The arrangement member 8 is attached to the upper end portion of the reflector 7 by screws or the like, and the attached surface portion 13 is attached to the attachment surface portion 2b of the lamp housing 2 by screws or the like. In the state in which the arrangement member 8 is attached to the lamp housing 2, the contact surface 13a of the attached surface portion 13 is in surface contact with the front surface of the attachment surface portion 2b.

  In addition, between the contact surface 13a of the to-be-attached surface part 13 and the front surface of the attachment surface part 2b, the thermally conductive grease, the adhesive agent, etc. are apply | coated, and the contact surface 13a and the front surface of the attachment surface part 2b have these grease and It is desirable that the contact is made through an adhesive or the like. The contact surface 13a and the front surface of the mounting surface portion 2b are brought into contact with each other via grease, an adhesive, or the like, thereby ensuring a good contact state between the contact surface 13a and the front surface of the mounting surface portion 2b.

  A substrate 14 is attached to the lower surface of the arrangement portion 11 of the arrangement member 8, and a light source 15 is mounted on the lower surface of the substrate 14. As the light source 15, for example, a light emitting diode (LED) that is a semiconductor light emitting element having directivity is used.

  A shade 16 is attached to the lower surface of the arrangement portion 11 of the arrangement member 8 (see FIGS. 1 and 2). The shade 16 is formed by integrally forming a mounted plate portion 17, a connecting plate portion 18, and a shielding plate portion 19 (see FIG. 4).

  The mounted plate portion 17 faces in the vertical direction, has a screw insertion hole 17a at the center in the left-right direction, and has positioning holes 17b and 17b on the left and right of the screw insertion hole 17a, respectively.

  The connecting plate portion 18 protrudes downward from the rear edge of the central portion in the left-right direction of the mounted plate portion 17.

  The shielding plate portion 19 protrudes rearward from the lower edge of the connecting plate portion 18 and has a transmission hole 19a penetrating vertically. The front end portion of the shielding plate part 19 is provided as a light shielding part 19b, and the transmission hole 19a and the light shielding part 19b are positioned in the front and rear. The light shielding part 19b is located in a region connecting the light source 15 and the front surface 9b of the reflector 7 (see FIG. 1).

  The shade 16 is positioned on the positioning member 8 by inserting positioning pins of the positioning member 8 into the positioning holes of the mounted plate portion 17. The shade 16 is attached to the arrangement portion 11 by an attachment screw 100 inserted through the screw insertion hole 17a and screwed into the screw hole 11c. In a state in which the shade 16 is attached to the placement portion 11, the shielding plate portion 19 is positioned to be spaced downward from the placement portion 11, and the light shielding portion 19 b is located in front of the light source 15.

  In the vehicular lamp 1 configured as described above, when light is emitted from the light source 15, part of the emitted light passes through the outer peripheral side of the shade 16 toward the reflection surface 9 a of the reflector 7, and the reflection surface Reflected by 9a, transmitted through the cover 3, and irradiated to the outside, a predetermined light distribution pattern is formed (see lights A, B, and C in FIG. 1). The light distribution pattern is, for example, a light distribution pattern as a low beam.

  In addition, another part of the light emitted from the light source 15 is shielded by the shielding plate portion 19 of the shade 16, in particular, the light shielding portion 19b. At this time, since the light shielding part 19b is located in the region connecting the light source 15 and the front surface 9b of the reflector 7 as described above, the light emitted from the light source 15 is blocked by the light shielding part 19b. It is not incident on the direction 9b. That is, the light emitted from the light source 15 does not reach the range H shown in FIG.

  Thus, in the vehicular lamp 1, the front surface 9b is formed at the front end portion of the reflector 7, and the light shielding portion 19b is located in the region connecting the light source 15 and the front surface 9b. It is possible to most efficiently block the light that travels and efficiently suppress the generation of illusion light on the oncoming vehicle and the preceding vehicle.

  The light emitted from the light source 15 includes light (direct light) transmitted through the transmission hole 19 a of the shade 16. The light transmitted through the transmission hole 19a passes through the front side of the front surface 9b, is transmitted through the cover 3, and travels obliquely downward in the front, and irradiates the area immediately in front of the vehicle on the road surface (light D in FIG. 1). E). Therefore, good visibility for the driver of the host vehicle is ensured.

  Note that when light is emitted from the light source 15, light may be incident on the front surface 9b as stray light or the like, but the incident light is diffused on the front surface 9b formed in a minute uneven shape. Therefore, even when light as stray light or the like is incident on the front surface 9b, the illusion light for the oncoming vehicle and the preceding vehicle is hardly generated, and the generation of the illusion light can be suppressed.

  When light is emitted from the light source 15 described above, heat is generated as the light source 15 is driven. The generated heat is transmitted from the light source 15 and the substrate 14 to the arrangement member 8 that functions as a heat sink, and is transmitted from the arrangement member 8 to the lamp housing 2. The lamp housing 2 is formed of a metal material having high thermal conductivity such as aluminum, and heat is radiated from the entire lamp housing 2 to ensure high heat dissipation.

  At this time, heat is also released from the arrangement member 8, and in particular, heat is radiated from the first fins 11a, 11a,... And the second fins 12a, 12a,. The heat released from the first fins 11 a, 11 a,... Is transmitted to the cover 3 through the air present in the lamp chamber 5.

  Thus, in the vehicular lamp 1, a part of the arrangement member 8 that functions as a heat sink is positioned to face the inner surface of the cover 3, so that heat released from the arrangement member 8 is transmitted to the cover 3. This contributes to melting of snow and ice attached to the surface of the cover 3.

  Further, the fin forming portion 12 of the arrangement member 8 is a portion that is visually recognized through the cover 3 from the front of the vehicular lamp 1. When the fin forming portion 12 is visually recognized, the first fins 11a, 11a,.・ ・ Is recognized as a decoration. Therefore, it is possible to improve the design of the vehicular lamp 1 by positioning the fin forming portion 12 so as to face the inner surface of the cover 3.

  Similarly, when the vehicular lamp 1 is viewed from the front, the front surface 9b is also visible, the minute uneven shape of the front surface 9b is recognized as a decoration, and the front surface 9b is a minute uneven shape. Thus, the design of the vehicular lamp 1 can be further improved.

  As described above, in the vehicular lamp 1, the light source 15 provided as a light source, the reflector 9 having the reflection surface 9a and the front surface 9b, and at least a part of the light traveling toward the front surface 9b are shielded. A shade 16 having a light shielding portion 19b. The shade 16 is formed with a transmission hole 19a through which a part of the light traveling toward the outside of the vehicular lamp 1 is transmitted.

  Accordingly, since the light traveling toward the front surface 9b is shielded by the light shielding portion 19b and part of the light is transmitted through the transmission hole 19a and travels to the outside, generation of the illusion light can be sufficiently suppressed by the light shielding portion 19b. At the same time, when the light is transmitted through the transmission hole 19a, it is possible to ensure a good irradiation state of the light irradiated toward the outside.

  Moreover, the arrangement | positioning member 8 in which the light source 15 is arrange | positioned is provided, the shade 16 is attached to the arrangement | positioning member 8, and the permeation | transmission hole 19a and the light-shielding part 19b are located in the front and back.

  Therefore, the shade 16 becomes the minimum size because the transmission hole 19a and the light shielding portion 19b, both of which are necessary for the shade 16, are located close to each other, and the vehicle lamp 1 can be downsized by reducing the size of the shade 16. Can be planned.

In the vehicular lamp 1, the light source 15 has a light emitting portion with a luminance of 30 cd / mm ² or more, and has a sufficient luminance to form a good light distribution pattern.

  Therefore, it is possible to form a light distribution pattern with appropriate brightness while preventing generation of illusion light by the light shielding portion 19b. In addition, since the light emitted from the light source 15 has high luminance, it is not necessary to use a plurality of light sources, and the vehicle lamp 1 can be configured using the single light source 15. Thus, it is possible to configure the vehicular lamp 1 capable of forming a good light distribution pattern while reducing the manufacturing cost and the manufacturing cost.

  In the conventional configuration without the shade 16, when the light source is changed from a halogen lamp to a semiconductor light emitting element (light source 15) having higher directivity than the halogen lamp, generation of illusion light can be sufficiently suppressed. Can not. Therefore, the configuration using the light source 15 which is a semiconductor light emitting element and the shade 16 for preventing the generation of the illusion light as in the present invention sufficiently generates the illusion light after forming a good light distribution pattern. This is a particularly useful configuration in terms of suppression.

  In the above, an example is shown in which light is not incident on the entire front surface 9b by the light shielding portion 19b of the shade 16, but for example, light is not incident on a part of the front surface 9b by the light shielding portion 19b of the shade 16. It is also possible.

  Moreover, although the example which the front surface 9b was formed in the reflector 7 above was shown, for example, the front surface 9b is not formed in the reflector 7, but the extension 20 is arrange | positioned in the front side in the lower end part of the reflector 7, A front surface 20a may be formed on the extension 20 (see FIG. 5).

  The upper surface of the extension 20 is formed as a front surface 20a, and the front surface 20a is formed in a minute uneven shape by, for example, knurling. Therefore, the light incident on the front surface 20a is diffused by the uneven shape.

  In the case where the front surface 20a is formed on the extension 20, the light shielding portion 19b of the shade 16 is located in a region connecting the light source 15 and the front surface 20a, and the light emitted from the light source 15 is light shielding portion 19b. Is not incident on the front surface 20a. In other words, the light emitted from the light source 15 does not reach the range H shown in FIG.

  Even in such a configuration in which the front surface 20a is formed on the extension 20, the generation of the illusion light can be sufficiently suppressed by the light shielding portion 19b, and the light is irradiated to the outside by being transmitted through the transmission hole 19a. It is possible to ensure a good irradiation state of the emitted light.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp, 2 ... Lamp housing, 3 ... Cover, 4 ... Lamp housing, 7 ... Reflector, 8 ... Arrangement member, 9a ... Reflecting surface, 9b ... Front surface, 15 ... Light source, 16 ... Shade, 19a ... Transmission hole, 19b ... light-shielding part, 20a ... front surface

Claims (5)

A light source;
A reflector having a reflecting surface for reflecting light emitted from the light source;
A shade having a light-shielding portion that shields at least part of the light toward the front surface located on the front side of the reflective surface;
A vehicular lamp, wherein the shade is formed with a transmission hole through which a part of light emitted from the light source and traveling to the outside is transmitted. The vehicular lamp according to claim 1, wherein the light shielding portion is positioned in a region connecting the light source and the front surface. An arrangement member on which the light source is arranged is provided,
The shade is attached to the placement member;
The vehicular lamp according to claim 1, wherein the transmission hole and the light-shielding portion are positioned front and rear. A lamp outer casing composed of a lamp body having an opening and a cover for closing the opening is provided,
A heat sink that releases heat generated when light is emitted from the light source is provided inside the lamp outer casing,
4. The vehicular lamp according to claim 1, wherein a part of the heat sink is positioned to face an inner surface of the cover. The vehicular lamp according to claim 1, 2, 3, or 4, wherein the light source is a semiconductor light emitting element, and the luminance of the light emitting unit is set to 30 cd / mm ² or more.

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