JP2010192331A - Lamp for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems of limited design of a light emitting pattern and degree of freedom in designing, a large number of components and high manufacturing cost of a conventional lamp for vehicle. <P>SOLUTION: The lamp includes a lamp housing 2 and a lamp lens 3, a light source 4, and a light distribution control unit 6. The light distribution control unit 6 is constituted of a group of fine prism elements. The group of fine prism elements is constituted of incidence planes 27, reflection planes 28, and outgoing planes 29. The incidence planes 27 and the outgoing plane 29 in the group of fine prism elements are alternately disposed stepwise so as to come closer to the side of the lamp lens 3 as they go in a radial direction of light L from the light source 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicular lamp such as a tail lamp, a stop lamp, a tail and stop lamp, and the like, and relates to a vehicular lamp that controls light distribution from a light source by a prism.

  Conventionally, this type of vehicle lamp is known (for example, Patent Document 1, Patent Document 2, and Patent Document 3). Hereinafter, a conventional vehicle lamp will be described. The vehicular lamps of Patent Literature 1 and Patent Literature 2 include a resin reflector formed entirely in a concave shape, a total reflection prism cut provided on the resin reflector, and a light source. When the light source is turned on, the light emitted from the light source is totally reflected by the total reflection prism cut of the resin reflector, and is irradiated in a predetermined direction with a predetermined light distribution pattern. The vehicular lamp of Patent Document 3 includes a lamp body and a through hole cover that divide a lamp chamber, and a right-angle prism-shaped or mirror-shaped reflector and a light source disposed in the lamp chamber. When the light source is turned on, the light emitted from the light source is totally reflected by the reflector, passes through the through hole cover, and is irradiated in a predetermined direction with a predetermined light distribution pattern.

  However, since the former conventional vehicle lamp is provided with a total reflection prism cut on a resin reflector that is formed in a substantially concave shape as a whole, the light emission pattern in the total reflection prism cut is a substantially concave shape of the resin reflector. The design of light emitting patterns and the degree of design freedom are limited. In addition, the latter conventional vehicular lamp includes a lamp body and a through hole cover, a reflector and a light source, and thus has a large number of parts, and the manufacturing cost is correspondingly high.

Japanese Patent Laid-Open No. 5-120903 Japanese Utility Model Publication No. 6-54104 JP 2004-47221 A

  The problems to be solved by the present invention are that in the conventional vehicle lamp, the design of the light emission pattern and the degree of design freedom are limited, the number of parts is large, and the manufacturing cost is high.

  The present invention (invention according to claim 1) includes a lamp housing and a lamp lens that define a lamp chamber, a light source disposed in the lamp chamber such that the light emission direction and the lamp lens are substantially parallel, A light distribution control unit that is provided integrally with a part of the lamp housing and controls light distribution from the light source, and the light distribution control unit is a light that is opposed to the light emission direction of the light source and the lamp lens. A transparent plate shape is formed of a fine prism element group, and the fine prism element group includes an incident surface on which light emitted from a light source is incident, a reflective surface on which light incident from the incident surface is totally reflected, The exit surface from which the light totally reflected by the reflection surface exits to the lamp lens side, and the entrance surface and the exit surface of the fine prism element group move toward the lamp lens side in the light emission direction of the light source. As you get closer, Each other are provided in a stepped shape, and wherein the.

  Further, according to the present invention (the invention according to claim 2), the incident surface of the fine prism element group is provided over the entire surface of the plate-shaped light distribution control unit as viewed from the light emission direction of the light source. The exit surface of the prism element group is composed of one or more planes, one or more curved surfaces, or a combination of one or more planes and one or more curved surfaces. It is characterized by.

  Further, the present invention (the invention according to claim 3) is characterized in that a plate member for preventing the rearward view is provided at least on the back side of the light distribution control portion of the lamp housing.

  Furthermore, the present invention (the invention according to claim 4) is characterized in that a light source and a light distribution control unit are set as one set, and a plurality of sets of light sources and a light distribution control unit are provided.

  Furthermore, according to the present invention (the invention according to claim 5), a part other than the light transmissive light distribution control part in the lamp housing is used as a light transmissive part, and a second light source is provided on the back side of the light transmissive part. It is characterized by that.

  Furthermore, in the present invention (the invention according to claim 6), a light source is provided in a light source housing disposed in a lamp chamber, and light from the light source is transmitted to the light source housing in a group of fine prism elements. An optical member to be incident on the incident surface is provided.

  The vehicle lamp according to the present invention (the invention according to claim 1) is provided integrally with a part of the lamp housing, has a light-transmitting plate shape, and is composed of a fine prism element group. The light emission pattern of the light distribution control unit can be arbitrarily changed by changing the position of the unit in the light emission direction of the light source. As a result, the vehicular lamp according to the present invention (the invention according to claim 1) has a light emitting pattern design and a greater degree of design freedom than a conventional vehicular lamp. In particular, in the vehicular lamp according to the present invention (the invention according to claim 1), the light distribution control unit which is a part of the lamp housing has a light-transmitting plate shape and is composed of a group of fine prism elements. The light distribution control part of any shape looks as if it is floating in the air (air), can express three-dimensional feeling, floating feeling, crystal feeling, and also freely design the light emission pattern Or design.

  In addition, the vehicular lamp according to the present invention (the invention according to claim 1) has a light-transmitting plate shape, and a light distribution control unit composed of a group of fine prism elements is provided integrally with a part of the lamp housing. Therefore, the light distribution control unit and the lamp housing are used together. As a result, the vehicular lamp according to the present invention (the invention according to claim 1) can reduce the number of parts as compared with the conventional vehicular lamp, and the manufacturing cost can be reduced accordingly. .

  In addition, in the vehicular lamp according to the present invention (the invention according to claim 1), the light distribution control unit has a light-transmitting plate shape and is composed of a group of fine prism elements. be able to. In particular, in the vehicular lamp according to the present invention (the invention according to claim 1), the light distribution control part of the housing has a light-transmitting plate shape and is composed of a group of fine prism elements. The surface treatment of the reflective surface such as vapor deposition or silver coating is not required, and accordingly, the environmental load can be reduced and the manufacturing cost can be reduced.

  In the vehicular lamp of the present invention (the invention according to claim 2), the incident surface of the fine prism element group is provided over the entire surface of the plate-shaped light distribution control unit as viewed from the light emission direction of the light source. Therefore, the light emitted from the light source can be efficiently incident on the fine prism element group of the light distribution control unit without waste.

  Moreover, in the vehicular lamp of the present invention (the invention according to claim 2), the exit surface of the fine prism element group is one or more planes, one or more curved surfaces, or one or more Since it consists of a combination of a plurality of planes and one or a plurality of curved surfaces, it is possible to arbitrarily and easily control the direction and amount of light emitted from the fine prism element group of the light distribution control unit. . As a result, the vehicular lamp according to the present invention (the invention according to claim 2) does not need to be provided with a prism or the like for controlling the light distribution on the lamp lens. Can be prevented. In addition, the structure of the lamp lens is simplified, and accordingly, the manufacture of the lamp lens is simplified and the manufacturing cost can be reduced.

  Furthermore, the vehicular lamp according to the present invention (the invention according to claim 3) is provided with a plate member for preventing the rear view from being provided at least on the back side of the light distribution control unit in the lamp housing. Even if the light is transparent, the back-preventing plate member can conceal the back side (back side) of the lamp more than the back-preventing plate member, thereby preventing the appearance from deteriorating. .

  Moreover, in the vehicular lamp according to the present invention (the invention according to claim 3), the light distribution control is performed by the light distribution control unit, and the plate member for preventing the rear view is not involved in the light distribution control. Any color, shape or material can be used for the plate member for preventing the back view. For example, the same color as the color of the vehicle body panel to which the lamp is attached, and a lightweight thin plate member can be used as a plate member for preventing the back view, and the appearance and design when not lit can be improved.

  Furthermore, the vehicular lamp of the present invention (the invention according to claim 4) uses a plurality of sets of the light source and the light distribution control unit, so that the vehicle lamp is compared with a combination of the light source and the light distribution control unit. When the light emission area is the same, the dimension of the light distribution and emission direction of the light distribution control unit can be reduced to about one half or less, and the lamp can be further thinned.

  Furthermore, in the vehicular lamp of the present invention (the invention according to claim 5), a portion other than the light transmissive light distribution control portion in the lamp housing is used as a light transmissive portion, and a second portion is provided on the back side of the light transmissive portion. By providing the light source, a lamp function separate from the lamp function by the light distribution control unit can be added, or the light distribution light amount of the same lamp function as the lamp function of the light distribution control unit can be complemented.

  Furthermore, the vehicular lamp according to the present invention (the invention according to claim 6) is a fine prism element group by diffusing (diverging), condensing (converging, converging), and deflecting (deflection) light from a light source by an optical member. Therefore, the degree of freedom of layout of the light distribution control unit is further increased, and the design of the light emission pattern and the degree of freedom of design are further increased.

  Moreover, in the vehicular lamp according to the present invention (the invention according to claim 6), since the light source is provided in the light source housing, when the lamp chamber is viewed from the lamp lens, the light source can be seen only by viewing the light source housing. can not see. As a result, the vehicular lamp of the present invention (the invention according to claim 6) can prevent the appearance from deteriorating due to the visible light source.

It is a longitudinal cross-sectional view (vertical cross-sectional view) which shows Example 1 of the vehicle lamp concerning this invention, Comprising: It is the II sectional view taken on the line in FIG. Similarly, it is a perspective view showing a lamp housing, a light source and a light distribution control unit excluding the lamp lens. Similarly, it is a top view which shows the fine prism element group of a light distribution control part. Similarly, it is a partially enlarged perspective view showing a fine prism element group of the light distribution control unit. Similarly, it is the VV sectional view taken on the line in FIG. Similarly, it is the VI-VI sectional view taken on the line in FIG. It is a description longitudinal cross-sectional view (Description vertical cross-sectional view) which shows Example 2 of the vehicle lamp concerning this invention. It is a longitudinal cross-sectional view (vertical cross-sectional view) which shows Example 3 of the vehicle lamp concerning this invention. FIG. 10 is a partial cross-sectional view showing a first modification of Example 3. FIG. 10 is a partial cross-sectional view showing a second modification of Example 3. It is a longitudinal cross-sectional view (vertical cross-sectional view) which shows Example 4 of the vehicle lamp concerning this invention. It is a partial cross section figure showing the 1st modification of an optical member. It is a partial cross section figure showing the 2nd modification of an optical member. It is a partial cross section figure showing the 3rd modification of an optical member. It is a perspective view of 1 prism element which shows the 1st modification of a fine prism element group. Similarly, it is a partial longitudinal cross-sectional view (partially vertical cross-sectional view) showing a first modification of the fine prism element group. It is a perspective view of 1 prism element which shows the 2nd modification of a fine prism element group. Similarly, it is a partial longitudinal cross-sectional view (partially vertical cross-sectional view) showing a second modification of the fine prism element group. It is a perspective view of 1 prism element which shows the 3rd modification of a fine prism element group. Similarly, it is a partial cross-sectional view (partial horizontal cross-sectional view) showing a third modification of the fine prism element group.

  Hereinafter, four examples of the embodiments of the vehicular lamp according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

  FIGS. 1-6 shows Example 1 of the vehicle lamp concerning this invention. Hereinafter, the configuration of the vehicular lamp in the first embodiment will be described. In FIG. 1, reference numeral 1 denotes a vehicular lamp according to the first embodiment, which is a tail lamp in this example. The vehicular lamp 1 includes a lamp housing 2, a lamp lens 3, a light source unit 5 having a light source 4, a light distribution control unit 6, and a plate member 7 for preventing back-viewing.

  In this example, the lamp housing 2 and the lamp lens 3 are made of a light transmissive resin member. In this example, the lamp lens 3 includes a transparent outer cover. A lamp chamber 8 is defined by the lamp housing 2 and the lamp lens 3. In the lamp chamber 8, in this example, the light source unit 5 is arranged on the upper side in the lamp chamber 8.

  The lamp housing 2 has a hollow ship shape with an open front. On the other hand, the lamp lens 3 has a hollow thin dish shape with an open rear surface. The end face 9 at the peripheral edge of the front opening of the lamp housing 2 and the end face 9 at the peripheral edge of the rear opening of the lamp lens 3 are fixed by, for example, ultrasonic welding or adhesion. As a result, the lamp chamber 8 is partitioned.

  A seal leg 10 is integrally provided on the entire peripheral edge or a part of the peripheral edge of the rear portion of the lamp housing 2. The tip end of the seal leg 10 is configured to press the seal member 11 against the vehicle body panel (body sheet metal) 12 and prevent water from entering the center side of the seal leg 10. In this example, in order to enhance the waterproof effect, the body panel 12 is provided with a recess (seal groove) 13 in which the seal member 11 is pressed and stored. As shown in FIG. 11, the sealing member 11 may be pressed against the flat body panel 12 without providing the recess 13.

  A plurality of bolts 14 are fixed to a predetermined portion of the rear portion of the lamp housing 2 closer to the center than the seal leg 10. The bolt 14 is attached to the vehicle body panel 12 with a nut 15. As a result, the vehicular lamp 1 is attached to the vehicle body panel 12.

  A mounting leg portion 16 is integrally provided at a predetermined location on the rear side of the lamp housing 2 and on the center side of the bolt 14. The mounting leg portion 16 is provided with a groove portion (concave portion) for mounting the plate member 7 for preventing the back view. An end portion of the plate member 7 for preventing the back view is detachably attached to the groove portion of the attachment leg portion 16. As a result, at least the back side of the light distribution control unit 6 in the lamp housing 2 (in this example, as shown in FIG. 1, the upper light distribution control unit 6 and the lower light distribution control unit 6 The plate member 7 for preventing the rearward view is provided on the lamp housing 2 (including the transparent portion).

  The plate member 7 for preventing the rearward view is composed of a lightweight thin plate member. In addition, an arbitrary color is colored on the surface (surface facing the lamp housing 2) of the plate member 7 for preventing the rearward appearance. For example, the same color as that of the body panel 12 is applied. A portion of the vehicle body panel 12 corresponding to the back-preventing plate member 7 is provided with an opening 17 for attaching, removing, and replacing the back-preventing plate member 7. .

  An opening 18 for mounting the light source unit 5 is provided above the rear portion of the lamp housing 2. The light source unit 5 is housed and disposed in the lamp chamber 8 through the opening 18 and is detachably attached to the edge of the opening 18 of the lamp housing 2 by a mounting bolt 19.

  The light source unit 5 includes the light source 4, a light source housing 20, a light source mounting member 21, and an optical member 22.

  The light source housing 20 has a hollow shape in which openings are provided in a rear portion 23 and a lower portion 24. The light source attachment member 21 includes a first attachment portion 25 and a second attachment portion 26. The light source 4 uses a semiconductor light source, for example, a self-luminous semiconductor light source (LED in this embodiment) such as an LED or an EL (organic EL).

  The light source 4 is attached to the first attachment portion 25 of the light source attachment member 21 and is housed and disposed in the light source housing 20 from the rear opening 23 of the light source housing 20. The second mounting portion 26 of the light source mounting member 21 is provided at the edge of the rear opening 23 of the light source housing 20 and the edge of the opening 18 of the lamp housing 2 via the edge. It is detachably attached by the mounting bolt 19. One or a plurality of the light sources 4 are provided in the light source unit 5.

  The optical member 22 is set in the lower opening 24 of the light source housing 20 and attached to the edge of the lower opening 24. The optical member 22 is an element that emits the light L emitted from the light source 4 as substantially parallel light L1, for example, a Fresnel lens. In the optical member 22, the incident surface (the surface facing the light source 4) is a flat surface, and the output surface is a Fresnel prism.

  The light source 4 is arranged on one side in the lamp chamber 8, in this example, on the upper side, via the light source unit 5. Further, in the light source 4, the emission direction of the light L emitted from the light source 4, the emission direction of the parallel light L <b> 1 emitted from the optical member 22, and the planar direction of the lamp lens 3 are substantially parallel. In the lamp chamber 8.

  The light distribution control unit 6 is provided integrally with a part of the rear closing portion of the lamp housing 2. The light distribution control unit 6 controls the light distribution of the light L from the light source 4. The light distribution control unit 6 is light transmissive opposite to the emission direction of the light L emitted from the light source 4 and the emission direction of the parallel light L1 emitted from the optical member 22 and the plane direction of the lamp lens 3. And is composed of a group of fine prism elements.

  The fine prism element group includes an incident surface 27 on which the parallel light L1 emitted from the optical member 22 is incident and the light L1 incident from the incident surface 27 is totally reflected. A surface 28 and an emission surface 29 from which the light L2 totally reflected by the reflection surface 28 is emitted to the lamp lens 3 side are configured. The entrance surface 27 and the exit surface 29 of the fine prism element group are alternately stepped so as to approach the lamp lens 3 side in the radiation direction of the light L of the light source 4 (from the upper side to the lower side). It is provided in the shape.

  As shown in FIG. 3, the incident surface 27 of the fine prism element group is viewed from the emission direction of the light L of the light source 4 and the emission direction (upper side) of the parallel light L1 emitted from the optical member 22, It has a hexagonal shape and is provided over the entire surface of the plate-shaped light distribution control unit 6. As shown in FIGS. 4 and 5, the emission surface 29 of the fine prism element group is composed of three planes. That is, it consists of three planes each including three of the six sides of the incident surface 27 having a hexagonal shape. As shown in FIG. 6, the reflecting surface 28 of the fine prism element group is a flat surface inclined (about 45 ° in this example) with respect to the incident surface 27 and the exit surface 29.

  The light distribution control unit 6 indicated by a solid line in FIG. 1, the light distribution control unit 6 indicated by a broken line in FIG. 1, and the light distribution control unit 6 shown in FIG. The layout of the light distribution control unit 6 is arbitrarily changed by changing the position to the emission direction of the light L of the light source 4 and the emission direction of the parallel light L1 emitted from the optical member 22. In this example, a part of the light distribution control unit 6 is divided into two upper and lower stages.

  As shown by a two-dot chain line in FIG. 1, among the lamp housings 2 made of a light transmissive resin member, the light distribution control unit 6 (in this example, as shown in FIG. The inner surface (the surface facing the lamp chamber 8) other than the light distribution control unit 6 and the lower light distribution control unit 6 (including the lamp housing 2 portion) is blindfolded. Surface treatment 44 is applied. The blindfold surface treatment 44 includes, for example, painting, vapor deposition, and graining. Moreover, the part which performs the surface treatment 44 for the blindfold is the seal leg 10 (the seal member 11 and the recess 13), the bolt 14, the mounting leg 16, and the mounting bolt in the lamp housing 2. 19 is a portion provided. In the lamp housing 2, the blind surface treatment 44 may also be applied to the peripheral portion of the front opening fixed to the lamp lens 3 by the end face 9.

  The vehicular lamp 1 according to the first embodiment is configured as described above, and the operation thereof will be described below.

  First, the light source 4 is turned on to emit light. Then, light L is emitted from the light source 4. The light L becomes parallel light L <b> 1 through the optical member 22. The parallel light L1 is incident from the incident surface 27 of the fine prism element group of the light distribution control unit 6. The incident light L1 is totally reflected by the reflection surface 28 of the fine prism element group of the light distribution control unit 6. The totally reflected light L <b> 2 is diffused (diverged) and emitted from the emission surface 29 of the fine prism element group of the light distribution control unit 6. The diffused (diverged) emitted light L2 passes through the lamp lens 3 and is irradiated outside in a predetermined direction with a predetermined light distribution pattern.

  The vehicular lamp 1 according to the first embodiment is configured and operated as described above, and the effects thereof will be described below.

  The vehicular lamp 1 according to the first embodiment is provided integrally with a part of the lamp housing 2, has a light-transmitting plate shape, and has a position of a light distribution control unit 9 configured by a fine prism element group. Is changed to the emission direction of the light L of the light source 4 and the emission direction of the parallel light L1 emitted from the optical member 22, the light emission pattern of the light distribution control unit 6 can be arbitrarily changed. The vehicular lamp 1 according to the first embodiment has a light emitting pattern design and a greater degree of design freedom than a conventional vehicular lamp. In particular, in the vehicular lamp 1 according to the first embodiment, the light distribution control unit 6 that is a part of the lamp housing 2 has a light-transmitting plate shape and is composed of a group of fine prism elements. Whether the light distribution control unit 6 having an arbitrary shape is floating in the air (when the light source 4 is turned on) and when the light distribution control unit 6 is not emitting light (when the light source 4 is turned off). The three-dimensional effect, the floating feeling, and the crystal feeling can be expressed, and the light emission pattern can be designed and designed arbitrarily and freely.

  Moreover, the vehicular lamp 1 according to the first embodiment has a light-transmitting plate shape, and a light distribution control unit 6 composed of a group of fine prism elements is integrally provided in a part of the lamp housing 2. Therefore, the light distribution control unit 6 and the lamp housing 2 are used together. As a result, the vehicular lamp 1 according to the first embodiment can reduce the number of parts as compared with the conventional vehicular lamp, and the manufacturing cost can be reduced accordingly.

  In addition, in the vehicular lamp 1 according to the first embodiment, the light distribution control unit 6 has a light-transmitting plate shape and is composed of a group of fine prism elements, so that the size and weight can be reduced. In particular, in the vehicular lamp 1 according to the first embodiment, a part of the light distribution control unit 6 of the housing 2 has a light-transmitting plate shape and is composed of a group of fine prism elements. The surface treatment of the reflecting surface such as painting is not necessary, and accordingly, the environmental load can be reduced and the manufacturing cost can be reduced.

  Further, in the vehicular lamp 1 according to the first embodiment, the incident surface 27 of the fine prism element group is viewed from the emission direction of the light L of the light source 4 and the emission direction (upper side) of the parallel light L1 emitted from the optical member 22. Since it is hexagonal and is provided over the entire surface of the plate-shaped light distribution control unit 6, the light L emitted from the light source 4 and the parallel light L1 emitted from the optical member 22 are efficiently used. The light can be incident on the fine prism element group of the light distribution control unit 6 well.

  In addition, in the vehicular lamp 1 according to the first embodiment, the exit surface 29 of the fine prism element group includes three planes, that is, three of each of the six sides of the hexagonal entrance surface 27. Therefore, the emission direction and the emission amount of the light L2 emitted from the emission surface 29 of the fine prism element group of the light distribution control unit 6 can be arbitrarily and easily controlled. For example, by changing the direction of the three exit surfaces 29, the exit direction of the emitted light L2 that is diffused (diverged) can be arbitrarily and easily controlled, and the area of the three exit surfaces 29 is changed. This makes it possible to arbitrarily and easily control the amount of emitted light L2 that is diffused (diverged). As a result, the vehicular lamp 1 according to this embodiment does not need to be provided with a prism or the like for controlling the light distribution on the lamp lens 3, so that it is possible to prevent the appearance (commercial value) of the lamp lens 3 from being deteriorated. it can. Further, the structure of the lamp lens 3 is simplified, and accordingly, the manufacture of the lamp lens 3 is simplified and the manufacturing cost can be reduced.

  Further, the vehicular lamp 1 according to the first embodiment includes at least the back side of the light distribution control unit 6 in the lamp housing 2 (in this example, as shown in FIG. 1, the upper light distribution control unit 6 and the lower light distribution control unit 6 are arranged. Since the plate member 7 for preventing the rearward view is provided in the portion (including the transparent portion) of the lamp housing 2 between the light control portion 6 and the light distribution control portion 6 and the lamp housing 2, Even if it is light-transmitting, the back side (back side) of the vehicular lamp 1 in this embodiment can be blindfolded by the plate member 7 for preventing back-viewing than the plate member 7 for preventing back-viewing, It can prevent the appearance from deteriorating.

  Moreover, in the vehicular lamp 1 according to the first embodiment, the light distribution control is performed by the light distribution control unit 6, and the plate member 7 for preventing the back view is not involved in the light distribution control. A free color, shape or material can be used for the plate member 7 for use. For example, the same color as the color of the vehicle body panel 12 to which the vehicular lamp 1 is mounted in the first embodiment, and a lightweight thin plate member can be used as the plate member 7 for preventing the rear view, and the appearance when not lit is obtained. And design can be improved.

  In addition, the vehicular lamp 1 according to the first embodiment includes a light distribution control unit 6 (in this example, as shown in FIG. 1, of the upper side of the lamp housing 2 made of a light transmissive resin member. A surface treatment 44 for blindfolding is applied to the inner surface (the surface facing the lamp chamber 8) other than the light distribution control unit 6 and the lower light distribution control unit 6 (including the portion of the lamp housing 2). Is. As a result, in the vehicular lamp 1 according to the first embodiment, even if the lamp housing 2 is made of a light-transmitting resin member, the seal leg 10 (the seal member 11 and the recess 13) provided in the lamp housing 2 is used. ), The bolts 14, the mounting legs 16, the mounting bolts 19 and the like can be blindfolded by the surface treatment 44 for blindfolding, and deterioration in appearance can be prevented.

  Furthermore, in the vehicular lamp 1 according to the first embodiment, since the light source 4 is provided in the light source housing 20 of the light source unit 5, when the inside of the lamp chamber 8 is viewed from the lamp lens 3, the light source housing 20 I can only see the light source 4 but not. As a result, the vehicular lamp 1 according to the first embodiment can prevent a decrease in appearance due to the light source 4 being visible. In addition, the vehicular lamp 1 according to the first embodiment includes the light source unit 5 having the light source 4 provided on the upper side in the lamp chamber 8, and transmits the light L from the light source 4 as the parallel light L1. Five optical members 22 are provided downward. As a result, when the vehicular lamp 1 in the first embodiment is viewed in the lamp chamber 8 from the lamp lens 3, the vehicular lamp 1 attached to the vehicle body panel 12 at this time is viewed from the viewpoint (eye point). Since the direction of the line of sight from the viewpoint is the direction from the top to the bottom, the light source 4 cannot be seen through the optical member 22, so that the appearance of the light source 4 can be further reduced. Can be prevented.

  FIG. 7 shows Example 2 of a vehicular lamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 6 denote the same components. FIG. 7A is an explanatory diagram showing an outline of the vehicular lamp 1 according to the first embodiment. FIG. 7B is an explanatory diagram showing an outline of the vehicular lamp 100 according to the second embodiment. In FIG. 7, hatching is omitted in order to make it easy to read the optical path. Hereinafter, the vehicular lamp 100 according to the second embodiment will be described.

  The vehicular lamp 100 according to the second embodiment uses two sets, whereas the vehicular lamp 1 according to the first embodiment uses one set of the light source 4 (light source unit 5) and the light distribution control unit 6. Is. In other words, the vehicular lamp 100 according to the second embodiment has two sets of light sources 4 and 4 arranged vertically, and two sets of light distribution control units 6 and 6 between the two sets of upper and lower light sources 4 and 4. Is to arrange.

  The vehicular lamp 100 according to the second embodiment has the above-described configuration, and the operation and effect will be described below. The height H2 of the vehicular lamp 100 in the second embodiment is higher than the height H1 of the vehicular lamp 1 in the first embodiment, but the depth (light distribution control) of the vehicular lamp 100 in the second embodiment. The dimension of the portion 6 in the direction of reflection and emission of the light L2) W2 can be made smaller than the depth W1 of the vehicular lamp 1 in the first embodiment. As a result, the vehicular lamp 100 according to the second embodiment has a light emission area (an area of the emission surface 29 of the fine prism element group of the light distribution control unit 6) S1 as compared with the vehicular lamp 1 according to the first embodiment. When S2 is the same, the depth (the dimension of the light distribution control unit 6 in the direction of reflection and emission of the light L2) can be reduced to about one half or less, so that the lamp can be made thinner.

  In the second embodiment, two sets of light distribution controllers 6 and 6 are arranged above and below, and two sets of light sources 4 and 4 are arranged between the two sets of light distribution controllers 6 and 6 above and below. Also good. Alternatively, two sets of light distribution control units 6 and 6 may be arranged on the left and right, and two sets of light sources 4 and 4 may be arranged between the two sets of left and right light distribution control units 6 and 6. Further, four sets of light distribution control units 6, 6, 6, 6 are arranged on the top, bottom, left, and right, and four sets of light sources 4, 4, between the four sets of light distribution control units 6, 6, 6, 6 on the top, bottom, left, and right. 4, 4 may be arranged. Furthermore, two sets of light sources 4 and 4 may be arranged on the left and right, and two sets of light distribution control units 6 and 6 may be arranged between the two sets of left and right light sources 4 and 4. Furthermore, four sets of light sources 4, 4, 4, 4 are arranged vertically and horizontally, and four sets of light distribution control units 6, 6, 6 are arranged between the four sets of light sources 4, 4, 4, 4. , 6 may be arranged.

  FIGS. 8-10 shows Example 3 of the vehicle lamp concerning this invention. In the figure, the same reference numerals as those in FIGS. 1 to 7 denote the same components. Hereinafter, the vehicular lamp 101 according to the third embodiment will be described.

  The vehicular lamp 101 according to the third embodiment is a portion of the lamp housing 2 other than the light distribution control unit 6, in this example, a portion between the upper light distribution control unit 6 and the lower light distribution control unit 6. 30 is a light transmission part. A second light source unit 32 having two second light sources 31 and 31 is provided on the back side of the light transmission part 30 (the side opposite to the side facing the lamp chamber 8).

  The second light source unit 32 includes the two second light sources 31, 31, a first attachment portion 33, and a second attachment portion 34. The two second light sources 31, 31 are attached to the first attachment portion 33 via attachment brackets 35. The first attachment portion 33 is attached to the second attachment portion 34. The second attachment portion 34 is attached to the attachment leg portion 16 of the lamp housing 2. The second mounting portion 34 is provided with two parabolic reflection surfaces 36, 36 corresponding to the two second light sources 31, 31.

  The vehicular lamp 101 in the third embodiment is configured as described above, and the operation will be described below. When the light source 4 is turned on, as described above, the light L from the light source 4 is emitted as emitted light L2 to the outside in a predetermined direction with a predetermined light distribution pattern. On the other hand, when the second light source 31 is turned on, a part of the light from the second light source 31 is transmitted through the light transmitting portion 30 and the lamp lens 3 of the lamp housing 2 as direct light (not shown) to the outside. Irradiated. Further, the remainder of the light from the second light source 31 is reflected by the parabolic reflection surfaces 36 and 36, passes through the light transmitting portion 30 and the lamp lens 3 of the lamp housing 2 as reflected light L 3, and is externally transmitted together with direct light. Are irradiated in a predetermined direction with a predetermined light distribution pattern.

  The vehicular lamp 101 according to the third embodiment is configured as described above, and the effects will be described below. The vehicular lamp 101 according to the third embodiment includes a light transmitting portion 30 other than the light-transmitting light distribution control unit 6 in the lamp housing 2, and a second light source 31 on the back side of the light transmitting portion 30. The second light source unit 32 is provided. As a result, the vehicular lamp 101 according to the third embodiment can be added with a lamp function (for example, a stop lamp) separate from the lamp function (for example, the tail lamp) by the light distribution control unit 6, or the light distribution control. The light distribution quantity of the same lamp function (for example, tail and stop lamp) as the lamp function (for example, tail and stop lamp) of the unit 6 can be complemented.

  Note that the vehicular lamp 101 according to the third embodiment uses direct light from the second light source 31 and reflected light L3 from the parabolic reflection surfaces 36 and 36, which is light from the second light source 31. To do. In addition to this, for example, light from the second light source is radiated to the outside as indirect light, or light from the second light source is used as direct light and light from a Fresnel lens provided in the light transmission unit 30. You may irradiate outside.

  FIG. 9 is a partial cross-sectional view illustrating a first modification of the third embodiment. The first modification of the third embodiment uses a bulb-type light source 37 instead of the semiconductor-type light source. The large light source unit 38 having the bulb-type second light source 37 includes an attachment portion 39 attached to the attachment leg portion 16 of the lamp housing 2. The mounting portion 39 is provided with a parabolic reflection surface 40. A mounting hole 41 is provided in the parabolic reflective surface 40. The second light source 37 is attached to the attachment hole 41 via a base 42. The thing of the 1st modification of this Example 3 can achieve the effect similar to the thing of the above-mentioned Example 3.

  FIG. 10 is a partial cross-sectional view illustrating a second modification of the third embodiment. In the second modification of the third embodiment, a prism 43 that controls the reflected light L3 from the parabolic reflecting surface 40 is provided in the light transmitting portion 30 of the lamp housing 2. The second modification of the third embodiment can achieve the same operational effects as those of the third embodiment.

  FIGS. 11-14 shows Example 4 of the vehicle lamp concerning this invention. In the figure, the same reference numerals as in FIGS. 1 to 10 denote the same components. Hereinafter, the vehicular lamp 102 according to the fourth embodiment will be described.

  In the vehicle lamp 102 according to the fourth embodiment, the Fresnel 220 is provided on the incident surface (the surface facing the light source 4), and is diffused (diverged) on the emission surface (the surface opposite to the surface facing the light source 4). The optical member 221 of the first modified example provided with the prism 224 is used.

  The vehicular lamp 102 according to the fourth embodiment is configured as described above, and the operation will be described below. When the light source 4 is turned on, the light L from the light source 4 passes through the optical member 221 of the first modified example and enters the fine prism element group of the light distribution member 6 as diffused light L4. The light incident on the fine prism element group of the light distribution member 6 is totally reflected and emitted, and the emitted light L2 is dropped onto the lamp lens 3 and is irradiated to the outside in a predetermined direction with a predetermined light distribution pattern.

  The vehicular lamp 102 according to the fourth embodiment is configured as described above, and the effects will be described below. As shown in FIGS. 11 and 12, the vehicular lamp 102 according to the fourth embodiment is an optical member of a first modification example in which a Fresnel 220 is provided on the incident surface and a diffusion prism 224 is provided on the exit surface. Since the light L can be diffused (diverged) from the light source 4 by 221 and can be made to enter the incident surface 27 of the fine prism element group of the light distribution control unit 6 as diffused light L4, the degree of freedom of the layout of the light distribution control unit 6 Will further increase the light emitting pattern design and design freedom. For example, the position of the light distribution control unit 6 can be changed up and down as in the first embodiment, and the position of the light distribution control unit 6 can be changed back and forth as in the fourth embodiment.

  FIG. 13 is a partial cross-sectional view illustrating a second modification of the optical member according to the fourth embodiment. The optical member 222 of the second modified example is provided with a Fresnel 220 on the incident surface and a converging (converging, converging) prism 225 on the exit surface. The optical member 222 of the second modified example condenses (converges and converges) the light L from the light source 4 and makes the condensed (convergent and converged) light L5 incident on the fine prism element group of the light distribution control unit 6. The light is incident on the surface 27. The optical member 222 of the second modified example can achieve the same effects as the optical member 221 of the first modified example.

  FIG. 14 is a partial cross-sectional view illustrating a third modification of the optical member according to the fourth embodiment. The optical member 223 of the third modified example is provided with a Fresnel 220 on the entrance surface and a deflection (deflection) prism 226 on the exit surface. The optical member 223 of the third modified example deflects (deflects) the light L from the light source 4 and makes the deflected (deflection) light L6 incident on the incident surface 27 of the fine prism element group of the light distribution control unit 6. It is what The optical member 223 of the third modification can achieve the same effects as the optical member 221 of the first modification and the optical member 222 of the second modification.

  FIG. 15 is a perspective view of one prism element showing a first modification of the fine prism element group. FIG. 16 is a partial longitudinal sectional view (partially vertical sectional view) showing a first modification of the fine prism element group.

  The fine prism element group of the light distribution control unit 61 of the first modified example is composed of a hexagonal incident surface 271, a reflective surface 281, and an output surface 291 composed of four planes. Since one plane of the emission surface 291 is inclined, the upward emission light L2 is obtained together with the horizontal emission light L2.

  FIG. 17 is a perspective view of one prism element showing a second modification of the fine prism element group. FIG. 18 is a partial longitudinal sectional view (partially vertical sectional view) showing a second modification of the fine prism element group.

  The fine prism element group of the light distribution control unit 62 of the second modified example has an emission surface composed of a hexagonal incident surface 272, a reflecting surface 282, two flat surfaces 292, and two curved surfaces (lateral cylindrical surfaces) 294. And a surface. Due to the two curved surfaces (lateral cylindrical surfaces) 294 of the emission surface, the upward and downward emission light L2 is obtained together with the horizontal emission light L2.

  FIG. 19 is a perspective view of one prism element showing a third modification of the fine prism element group. FIG. 20 is a partial cross-sectional view (partially horizontal cross-sectional view) showing a third modification of the fine prism element group.

  The fine prism element group of the light distribution control unit 63 of the third modified example has an emission surface composed of a hexagonal incident surface 273, a reflective surface 283, two flat surfaces 293, and two curved surfaces (vertical cylindrical surfaces) 295. And a surface. Outgoing light L2 diffused in the left-right direction is obtained by two curved surfaces (vertical cylindrical surfaces) 295 of the exit surface.

  The fine prism element group of the light distribution control unit 61 of the first modified example, the fine prism element group of the light distribution control unit 62 of the second modified example, and the fine prism element group of the light distribution control unit 63 of the third modified example Can achieve the same effects as the light distribution control unit 6 described above.

  In the above embodiment, a tail lamp, a stop lamp, and a tail and stop lamp will be described as vehicle lamps. However, the present invention can also be applied to vehicle lamps other than tail lamps, stop lamps, tail and stop lamps, for example, vehicle lamps such as backup lamps, turn signal lamps, curve lamps, fog lamps, and head lamps. .

DESCRIPTION OF SYMBOLS 1,100,101,102 Vehicle lamp 2 Lamp housing 3 Lamp lens 4 Light source 5 Light source unit 6, 61, 62, 63 Light distribution control part 7 Plate member for preventing back view 8 Lamp chamber 9 End face 10 Seal leg part 11 Seal member 12 Car body panel 13 Recess 14 Bolt 15 Nut 16 Mounting leg 17 Opening 18 Opening 19 Mounting bolt 20 Light source housing 21 Light source mounting member 22, 221, 222, 223 Optical member 220 Fresnel 224 Diffusing prism 225 Condensing prism 226 Deflection prism 23 Rear opening 24 Lower opening 25 First mounting portion 26 Second mounting portion 27, 271, 272, 273 Incident surface 28, 281, 282, 283 Reflecting surface 29, 291, 292, 293, 294, 295 Outgoing surface 30 Light transmission part 31 Second light source 32 Second Source unit 33 First mounting portion 34 Second mounting portion 35 Mounting bracket 36 Parabolic reflection surface 37 Second light source 38 Second light source unit 39 Mounting portion 40 Parabolic reflection surface 41 Mounting hole 42 Base 43 Prism 44 Blindfold Surface treatment L Light from light source L1 Parallel light from optical member L2 Light emitted from light distribution controller L3 Reflected light from parabolic reflecting surface L4 Diffused light from optical member L5 Condensed light from optical member L6 Deflection light from optical member H1, H2 Height W1, W2 Depth S1, S2 Light emission area

Claims (6)

In a vehicle lamp that controls light distribution from a light source by a prism,
A lamp housing and a lamp lens that partition the lamp chamber;
A light source disposed in the lamp chamber such that a light emission direction and the lamp lens are substantially parallel;
A light distribution control unit that is provided integrally with a part of the lamp housing and controls light distribution from the light source;
With
The light distribution control unit has a light-transmitting plate shape facing the light emission direction of the light source and the lamp lens, and is composed of a fine prism element group,
The fine prism element group includes an incident surface on which light emitted from the light source is incident, a reflecting surface on which light incident from the incident surface is totally reflected, and light totally reflected on the reflecting surface is emitted to the lamp lens side. And a light exit surface,
The entrance surface and the exit surface of the fine prism element group are alternately provided in a staircase shape so as to approach the lamp lens side in the light emission direction of the light source.
A vehicular lamp characterized by the above. The incident surface of the fine prism element group is provided over the entire surface of the plate-shaped light distribution control unit as viewed from the light emission direction of the light source,
The exit surface of the fine prism element group may be one or more planes, one or more curved surfaces, or a combination of one or more planes and one or more curved surfaces. Become,
The vehicular lamp according to claim 1. On the back side of at least the light distribution control unit of the lamp housing, a plate member for preventing a back view is provided,
The vehicular lamp according to claim 1 or 2. The light source and the light distribution control unit are a set, and a plurality of sets of the light source and the light distribution control unit are provided.
The vehicular lamp according to any one of claims 1 to 3. A part other than the light-transmitting light distribution control part in the lamp housing is a light transmission part,
A second light source is provided on the back side of the light transmission part.
The vehicular lamp according to any one of claims 1 to 4, wherein the vehicular lamp is provided. The light source is provided in a light source housing disposed in the lamp chamber,
The light source housing is provided with an optical member that causes light from the light source to enter the incident surface of the fine prism element group.
The vehicular lamp according to any one of claims 1 to 5, wherein the vehicular lamp is provided.

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