JP2009252590A - Vehicle lamp fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the visibility of a semiconductor light source when it is turned on to emit light. <P>SOLUTION: According to the invention, a prism element is provided on an inner surface of a lamp lens 4. The prism element includes: a first prism portion 27 that outputs light L1 emitted from the semiconductor light source 6 through the external surface of the lamp lens 4 substantially perpendicularly thereto; and a second prism portion 28 that outputs light L2 emitted from the semiconductor light source 6 through the external surface of the lamp lens 4 substantially perpendicularly thereto. The first and second prism portions 27 and 28 are each provided two on each of two sides opposite to each other with respect to a vertical plane 31. As a result, the invention helps improve the visibility of the semiconductor light source 6 when it is turned on to emit light. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicular lamp such as a daytime running lamp (DTRL), which uses a semiconductor light source such as an LED as a light source.

  This type of vehicular lamp is conventionally known (for example, Patent Document 1). The vehicle lamp will be described below. The vehicular lamp includes a lamp housing and a lamp lens that define a lamp chamber, and a semiconductor-type light source disposed in the lamp chamber via a circuit board. When the semiconductor-type light source is turned on and emitted, light emitted from the semiconductor-type light source passes through the lamp lens and is irradiated to the outside with a predetermined light distribution pattern.

  In this vehicular lamp, it is important to improve the visibility when the semiconductor light source is turned on.

Japanese Utility Model Publication No. 2-104511 JP 2004-319379 A JP 2004-319380 A

  The problem to be solved by the present invention is to improve visibility when a semiconductor light source is turned on.

  According to the present invention (the invention according to claim 1), the prism that controls the emission direction of light from the semiconductor-type light source that is incident on the inner surface of the lamp lens and incident from the inner surface of the lamp lens and emitted from the outer surface of the lamp lens. An element is provided, and the prism element is provided at a portion facing the semiconductor light source, and emits light from the semiconductor light source from the outer surface of the lamp lens substantially perpendicularly to the outer surface. And a second prism portion that is provided on at least one portion of both sides of the first prism portion and emits light from the semiconductor-type light source from the outer surface of the lamp lens substantially perpendicularly to the outer surface. The first prism portion and the second prism portion pass through the semiconductor-type light source in a direction perpendicular to the outer surface of the lamp lens and connecting the first prism portion and the second prism portion. It provided two on both sides of the face, characterized in that.

  According to the present invention (the invention according to claim 2), the prism elements are provided between the two first prism portions and the two second prism portions, respectively, so that the light from the semiconductor-type light source is ramped. It has two 3rd prism parts each radiate | emitted from the outer surface of a lens near the outer surface, It is characterized by the above-mentioned.

  Further, according to the present invention (the invention according to claim 3), the outer surface of the lamp lens is inclined from the center of the lamp lens to the edge with a downward gradient with respect to a plane contacting the center of the outer surface of the lamp lens. Features.

  In the vehicular lamp according to the present invention (the invention according to claim 1), when the semiconductor-type light source is turned on by the means for solving the above-described problems, the light emitted from the semiconductor-type light source is emitted from the inner surface of the lamp lens. The light enters the two first prism parts and the two or four second prism parts, and exits from the outer surface of the lamp lens substantially perpendicularly (including perpendicularly) to the outer surface. As a result, the vehicular lamp of the present invention (the invention according to claim 1) has one semiconductor-type light source in a state of being lit and lit when viewed from the front when the semiconductor-type light source is turned on. In FIG. 4, at least four or six at most appear corresponding to the two first prism portions and the two or four second prism portions, respectively. For this reason, the vehicular lamp of this invention (the invention according to claim 1) can improve visibility and contribute to traffic safety since the entire front surface of the lamp lens appears to emit light uniformly. Can do. Further, the vehicular lamp of the present invention (the invention according to claim 1) has a glossy appearance and an improved appearance, and a high-class feeling when a single semiconductor-type light source appears to be many. In particular, the vehicular lamp of the present invention (the invention according to claim 1) is a daytime running system that allows a driver or a pedestrian of another vehicle (other vehicle) to visually recognize the presence of the own vehicle (own vehicle) during the daytime. Useful as a lamp.

  Moreover, in the vehicular lamp of the present invention (the invention according to claim 1), since the entire lamp lens appears to emit light uniformly, one semiconductor-type light source that is lit and lit is 1 on the outer surface of the lamp lens. The appearance is improved as compared with a vehicular lamp that can only be seen (a so-called spotlight vehicular lamp). In addition, the vehicular lamp according to the present invention (the invention according to claim 1) can be set with a small number of semiconductor-type light sources since the entire lamp lens appears to emit light uniformly. It can be made cheap. In particular, the vehicle lamp of the present invention (the invention according to claim 1) is suitable for a small-type vehicle lamp in which the distance between the lamp lens and the semiconductor light source is small. Also, a vehicle lamp that uses a semiconductor-type light source with a large output (light quantity), and the vehicle needs to reduce the number of semiconductor-type light sources and increase the distance between the semiconductor-type light sources for heat dissipation. Suitable for lighting fixtures.

  Further, in the vehicular lamp of the present invention (the invention according to claim 2), when the semiconductor-type light source is turned on by the means for solving the above-described problems, the light emitted from the semiconductor-type light source is emitted from the lamp lens. The light enters the two or four third prism portions on the inner surface, refracts from the outer surface of the lamp lens toward the outer surface, and exits. As a result, the vehicular lamp of the present invention (the invention according to claim 1) emits light from the side surface of the lamp lens when viewed from the side surface (left and right side or left and right side) when the semiconductor light source is turned on. Therefore, the visibility in the side direction as well as the visibility in the front direction can be improved, and further, it can contribute to traffic safety.

  Furthermore, in the vehicular lamp according to the present invention (the invention according to claim 3), the light emitted from the semiconductor-type light source is emitted from the two or four inner surfaces of the lamp lens by means for solving the above-mentioned problems. When light is incident on the three prism portions and refracted from the outer surface of the lamp lens toward the outer surface and emitted, the light is further refracted toward the outer surface and emitted, so that the visibility in the side surface direction can be further improved. Can contribute to road safety.

  Embodiments of a vehicular lamp according to the present invention will be described below in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments. Further, in this specification, “front, rear, upper, lower, left, right” means “front, rear, upper, lower, left, right” when the vehicle lamp according to the present invention is mounted on a vehicle. is there. Further, in the drawings, the symbols “F”, “B”, “U”, “D”, “L”, “R” are “front”, “rear”, “upper”, “lower”, “left”. , “Right”.

  Hereinafter, the configuration of the vehicular lamp in this embodiment will be described. FIG. 1 is a perspective view showing a vehicular lamp (daytime running lamp) in this embodiment. FIG. 2A is a front view showing a vehicular lamp (daytime running lamp). FIG. 2B is also a cross-sectional view taken along line BB in FIG. FIG. 3 is a partially exploded cross-sectional view showing a vehicular lamp (daytime running lamp). 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is an exploded sectional view showing a vehicular lamp (daytime running lamp). FIG. 6A is a front view showing the lamp lens. FIG. 6B is also a rear view showing the lamp lens. FIG. 7A is a cross-sectional view taken along the line VIIA-VIIA in FIG. FIG. 7B is a cross-sectional view taken along the line VIIB-VIIB in FIG. FIG. 8 is also an explanatory diagram showing prism elements on the inner surface of the lamp lens. FIG. 9A is a cross-sectional view taken along the line IXA-IXA in FIG. FIG. 9B is a cross-sectional view taken along line IXB-IXB in FIG. FIG. 9C is a cross-sectional view taken along the line IXC-IXC in FIG. FIG. 9D is a cross-sectional view taken along the line IXD-IXD in FIG. FIG. 10 is also a perspective view showing the lamp housing. FIG. 11 is also a front view showing a circuit board and a semiconductor-type light source. FIG. 12A is a front view showing the seat, similarly. FIG. 12B is also a rear view showing the sheet. FIG. 12C is a cross-sectional view taken along the line CC in FIG. In FIGS. 7A, 8 and 9C, hatching is omitted for the explanation of the optical path and the prism.

  In FIG. 1, reference numeral 1 is a daytime running lamp for an automobile, for example. The daytime running lamp 1 includes a plurality of lamp housings 3 and lamp lenses 4 that define a lamp chamber 2, and a circuit board (printed circuit board) 5 disposed in the lamp chamber 2, in this example. , Six semiconductor-type light sources 6 and a sheet (decorative sheet) 7 disposed in the lamp chamber 2 closer to the lamp lens 4 than the circuit board 5.

  The lamp housing 3 is made of, for example, a light impermeable synthetic resin. As shown in FIGS. 1 to 5 and 10, the lamp housing 3 has one front surface (front surface) opened and the other five rear surfaces (rear surface), upper surface (plane), and lower surface ( It has a substantially rectangular parallelepiped shape in which the bottom surface), the left surface (left side surface), and the right surface (right side surface) are closed. The lamp housing 3 is provided with a concave storage portion 8 that forms the lamp chamber 2.

  A long hole 9 is provided in the center of the rear wall of the lamp housing 3 (that is, the bottom of the storage portion 8). A grommet 10 is fitted and fixed to the long hole 9 in a watertight manner. Two cords 11 are inserted and fixed in the grommet 10. The two cords 11 are inserted into a protective tube 12. One end of each of the two cords 11 is electrically connected to a printed circuit (printed circuit) (not shown) of the circuit board 5 via a solder 13. The other ends of the two cords 11 are electrically connected to a power source (battery) or the like via a terminal (not shown), a connector (not shown), or the like.

  Boss portions 14 are integrally provided at both ends of the rear wall of the lamp housing 3 (that is, the bottom of the storage portion 8). The circuit board 5 is fixed to the boss portion 14 with a screw 16 through a washer 15. A step portion 17 on which the circuit board 5 is placed is provided at an end portion of the boss portion 14. The corners of the rear wall of the lamp housing 3 and the upper wall, lower wall, left wall, and right wall (four side walls) of the lamp housing 3, the corners of the bottom and the four sides of the storage unit 8. The part is integrally provided with a plurality of ribs 18 on which the circuit board 5 is placed. The height of the rib 18 and the height of the boss portion 14 to the stepped portion 17 are substantially equal.

  An extension rib 19 is provided integrally with an arbitrary number of ribs 18 among the plurality of ribs 18 of the lamp housing 3. The sheet 7 is bonded and fixed to the extension rib 19. Although not shown, one or a plurality of air holes may be provided at an arbitrary position on the bottom of the lamp housing 3, and a filter that covers the air holes may be provided.

  A mounting boss portion 20 is integrally provided at a location near the top wall side (upper side in FIG. 2A) of the left and right wall of the lamp housing 3. The mounting boss portion 20 is for mounting the daytime running lamp 1 to a vehicle body (for example, a bumper or the like) via a mounting bracket (not shown).

  A flange portion 21 is integrally provided at a corner portion of the rear wall and the four side walls of the lamp housing 3 and on the corner portion on the rear wall side of the entire peripheral edge portion of the lamp housing 3. A notch 22 is provided in the flange portion 21 in the longitudinal direction, that is, in the center of the flange portion 21 on the lower surface wall side. The notch 22 is for preventing erroneous assembly when the lamp housing 3 and the lamp lens 4 are assembled.

  The wall surface 23 outside the four side walls of the lamp housing 3, and the four side surfaces of the entire peripheral edge of the lamp housing 3 are inclined in a divergent shape from the front wall of the lamp housing 3 to the flange portion 21 of the rear wall. is doing. As shown in FIGS. 2B and 3, the slopes of the wall surfaces 23 of the left wall and the right wall of the lamp housing 3 are gentle. On the other hand, the inclination of the wall surface 23 of the upper surface wall and the lower surface wall of the lamp housing 3 is steep (substantially vertical) as shown in FIGS.

  It is the entire periphery of the lamp housing 3 and is located on the lamp chamber 2 side of the four side walls of the lamp housing 3 (that is, the entire periphery of the opening of the storage portion 8 of the lamp housing 3, A welding surface 24 is provided on the front wall of the lamp housing 3.

  A standing wall 25 is integrally provided on the front peripheral wall of the lamp housing 3, that is, on the entire peripheral edge of the opening of the storage portion 8 of the welding surface 24. Of the standing walls 25, the longitudinal standing walls 24, that is, the end surfaces of the standing wall 25 on the upper surface wall side and the standing wall 25 on the lower surface wall side, have a center at the apex as shown by a two-dot chain line in FIG. Both sides have a gentle downward slope.

  The lamp lens 4 is made of, for example, a light transmissive synthetic resin. As shown in FIGS. 1 to 9, the lamp lens 4 has a hollow surface in which the rear surface of one surface is opened and the front surface, upper surface, lower surface, left surface, and right surface of the other five surfaces are closed. It has a rectangular parallelepiped shape. The lamp lens 4 is provided with a concave (or reverse concave) accommodating portion 26 that forms the lamp chamber 2.

  A first prism element portion and a second prism element portion are provided on the inner surface of the front wall of the lamp lens 3 (that is, the bottom portion of the storage portion 26).

  The first prism element portion is provided in a portion corresponding to the semiconductor-type light source 6, is light from the semiconductor-type light source 6, enters from the inner surface of the lamp lens 4, and is an outer surface of the lamp lens 4. It controls the emission direction of the light emitted from. The first prism element unit includes a first prism unit 27, a second prism unit 28, and a third prism unit 29. The first prism element unit is composed of a fourth prism unit 30.

  Six first prism portions 27 are provided at portions facing the six semiconductor light sources 6. The first prism unit 27 emits the light L1 from the semiconductor light source 6 from the outer surface of the lamp lens 4 substantially perpendicularly to the outer surface.

  The second prism portion 28 is provided on at least one portion of both sides of the first prism portion 27. That is, the second prism portion 28 is provided on both sides of four of the six first prism portions 27 among the six first prism portions 27. The second prism portion 28 is provided on one side of the two first prism portions 27 at both ends of the six first prism portions 27. The second prism portion 28 emits the light L2 from the semiconductor light source 6 from the outer surface of the lamp lens 4 substantially perpendicularly to the outer surface.

  The third prism portion 29 is provided between the first prism portion 27 and the second prism portion 28. The third prism portion 29 refracts and emits the light L3 from the semiconductor light source 6 from the outer surface of the lamp lens 4 toward the outer surface.

  The fourth prism unit 30 is provided on at least one side of both sides of the first prism element unit. That is, the fourth prism part 30 is provided on both sides of the second prism part 28 of the four first prism element parts among the six first prism element parts. The fourth prism portion 30 is provided on one side of the second prism portion 28 of the two first prism element portions at both ends of the six first prism element portions. The fourth prism unit 30 controls the emission direction of the external light L4 that is incident from the outer surface of the lamp lens 4 and is emitted from the inner surface of the lamp lens 4 nonuniformly.

  The first prism unit 27, the second prism unit 28, the third prism unit 29, and the fourth prism unit 30 are perpendicular to the outer surface of the lamp lens 4 and are connected to the first prism unit 27 and the first prism unit. 2 on each side of the vertical surface 31 passing through the semiconductor-type light source 6 in the direction connecting the two prism portions 28, the third prism portion 29 and the fourth prism portion 30 (longitudinal direction of the lamp lens 4). Is provided.

  The two first prism portions 27 each have a concave spherical shape centered on the light source chip of the one semiconductor light source 6 and recessed from the inner surface to the outer surface of the lamp lens 4. The two or four second prism portions 28 each have a convex curved shape protruding from the outer surface of the lamp lens 4 to the inner surface. The two or four third prism portions 29 each have a concave spherical shape centered on the light source chip of the one semiconductor-type light source 6 and recessed from the inner surface to the outer surface of the lamp lens 4. The two or four fourth prism portions 30 each have an inclined surface shape that continues from the two or four convex curved second prism portions 28.

  The two first prism portions 27 and the two or four third prism portions 29 are connected via two or four step prism portions 32, respectively. The two first prism portions 27, the two or four step prism portions 32, and the two or four third prism portions 29 have a so-called Fresnel shape. The two or four second prism portions 28 and the two or four third prism portions 29 are respectively two or four step prism portions 33 and two or four inclined prism portions. 34. The two adjacent fourth prism portions 30 are connected via two valley prism portions 35 each having a concave curved shape that is recessed from the inner surface to the outer surface of the lamp lens 4.

  The outer surface of the lamp lens 4 is inclined from the center of the lamp lens 4 to the edge with a downward gradient with respect to a plane 36 that is in contact with the center of the outer surface of the lamp lens 4.

  The entire periphery of the lamp lens 4 and the four side walls (upper surface wall, lower surface wall, left surface wall, and right surface wall) of the lamp lens 4 are fitted to the entire periphery of the lamp housing 3 from the outside. The fitting wall 37 is integrally provided. The fitting wall 37 of the lamp lens 3 is inclined in a divergent shape along the inclined side surface 23 of the lamp housing 3 in the fitting direction (direction from the front surface to the rear surface).

  A welding surface 38 corresponds to the welding surface 24 of the lamp housing 3 in the entire peripheral edge portion of the lamp lens 4 and at a position closer to the lamp chamber 2 than the fitting wall 37 of the lamp lens 4. Is provided. A welding bead portion 39 is integrally provided over the entire peripheral edge portion of the lamp lens 4 at a location on the welding surface 38 of the lamp lens 4 from the lamp chamber 2 side.

  A concave portion 40 is provided outside the mounting boss portion 20 of the lamp housing 3 at a location near the upper surface wall side (the upper side in FIGS. 2A and 6A) of the left and right wall of the lamp lens 4. Are provided so that they can be fitted together.

  A convex portion 41 is integrally provided at the center of the lower wall of the lamp lens 4 so as to fit into the notch 22 of the lamp housing 3. The convex portion 41 and the notch 22 are for preventing erroneous assembly when the lamp housing 3 and the lamp lens 4 are assembled.

  The circuit board 5 is made of an insulating member. As shown in FIG. 11, the circuit board 5 has a rectangular thin plate shape. The circuit board 5 is disposed in the lamp chamber 2 (the housing portion 8 of the lamp housing 3 and the housing portion 26 of the lamp lens 4). The six semiconductor light sources 6 are attached to one surface (front surface) of the circuit board 5 at equal intervals, and electronic components 42 such as resistors and diodes are attached. A printed circuit (printed circuit) (not shown) is wired on the other surface (rear surface) of the circuit board 5. Of the six semiconductor-type light sources 6 among the two ends of the circuit board 5, an inner diameter is between the semiconductor-type light sources 6 at both ends and the adjacent semiconductor-type light sources 6. A circular through-hole 43 that is substantially the same as or slightly larger than the outer diameter of the small-diameter portion of the boss portion 14 (the tip portion than the stepped portion 17) is provided.

  As the semiconductor-type light source 6, for example, a self-luminous semiconductor-type light source (LED in this embodiment) such as LED or EL (organic EL) is used. As shown in FIGS. 2B and 3 to 5, the semiconductor-type light source 6 includes a substantially square plate-shaped substrate 44, and a light emitting unit 45 provided on one surface (front surface) of the substrate 44. , And four terminals 46 provided on the other surface (rear surface) of the substrate 44. The light emitting unit 45 includes a minute rectangular parallelepiped light source chip (not shown) fixed to one surface of the substrate 44, and a hemispherical (dome-shaped) light transmission member (lens) covering the light source chip. It will be.

  The four terminals 46 of the six semiconductor light sources 6 are electrically connected to a printed circuit (printed circuit) (not shown) of the circuit board 5 by solder 47, respectively. Thereby, the circuit board 5 and the six semiconductor-type light sources 6 constitute an assembly part (sub assembly).

  The sheet 7 is made of a synthetic resin member. As shown in FIG. 12, the sheet 7 has a rectangular sheet shape that is slightly larger than the circuit board 5. The sheet 7 includes, for example, a polycarbonate (PC) base sheet 48, a protective sheet (or protective film) 49 laminated on one surface (front surface) of the base sheet 48, and the other surface (rear surface) of the base sheet 48. ) And a pressure-sensitive adhesive sheet (or pressure-sensitive film) 51 laminated on the edges of both long sides of the print sheet 50.

  The printing sheet 50 is formed by printing a texture pattern on a sheet (or film) with a white or silver paint. The print sheet 50 constitutes a scattering reflection surface.

  In the sheet 7, a square hole 52 that is slightly larger than the substrate 44 of the semiconductor type light source 6 corresponds to four of the six semiconductor type light sources 6. It is provided at equal intervals. Further, rectangular cutouts 53 that are slightly larger than the substrate 44 of the semiconductor light source 6 are provided at both ends of the sheet 7, and the two semiconductor light sources at both ends of the six semiconductor light sources 6. Two are provided corresponding to six.

  The vehicular lamp (daytime running lamp 1) in this embodiment has the above-described configuration, and how to assemble it will be described below with reference to FIGS. 2B and 3 to 5. FIG.

  First, the circuit board 5 and the six semiconductor-type light sources 6 as assembled parts are accommodated in the accommodating portion 8 of the lamp housing 3. Further, the through hole 43 of the circuit board 5 is fitted into the small diameter portion of the boss portion 14 of the lamp housing 3. Further, the edge of the circuit board 5 and the edge of the through hole 43 are directly placed on the rib 18 and the step 17 of the lamp housing 3.

  Next, the washer 15 is placed on the edge of the through hole 43 of the circuit board 5. The screw 16 is screwed into the boss portion 14 of the lamp housing 3 through the through hole of the washer 15 and the through hole 43 of the circuit board 5 to assemble the circuit board 5 and the six semiconductor-type light sources 6. The parts are fixed to the lamp housing 3.

  Then, the seat 7 is stored in the storage portion 8 of the lamp housing 3. Further, the four holes 52 and the two notches 53 of the sheet 7 are fitted to the substrates 44 of the six semiconductor-type light sources 6. Further, the adhesive sheet 51 of the sheet 7 is adhered to the extension rib 19 of the lamp housing 3 to fix the sheet 7 to the lamp housing 3.

  Subsequently, the fitting wall 37 at the entire peripheral edge of the lamp lens 4 is fitted to the inclined wall surface 23 at the entire peripheral edge of the lamp housing 3 from the outside. The bead portion 39 of the lamp lens 4 is brought into contact with the welding surface 24 of the lamp housing 3. In this state, ultrasonic waves are transmitted from a tool horn (not shown) of an ultrasonic welding apparatus (not shown) to the welding surface 24 of the lamp housing 3 and the welding surface 38 (the bead portion 39 of the lamp lens 4). The welding surface 24 of the lamp housing 3 and the welding surface 38 of the lamp lens 4 are welded to each other via the bead portion 39.

  As described above, the vehicular lamp (daytime running lamp 1) in this embodiment is assembled.

  The vehicular lamp 5 in this embodiment has the above-described configuration, and the operation thereof will be described below.

  The light emitting units 45 of the six semiconductor-type light sources 6 are turned on and emitted. Then, as shown in FIGS. 7A and 9C, a part L1 of the light emitted from the light emitting portions 45 of the six semiconductor light sources 6 is one semiconductor light source of the lamp lens 4. 6 enters the two first prism portions 27 and exits from the outer surface of the lamp lens 4 substantially perpendicularly to the outer surface. In addition, a part L2 of the light emitted from the light emitting unit 45 is incident on two or four second prism units 28 with respect to one semiconductor-type light source 6 of the lamp lens 4 and the outer surface of the lamp lens 4. Is emitted almost perpendicularly to the outer surface. Thus, when the daytime running lamp 1 is viewed from the front, the six semiconductor light sources 6 are actually housed in the lamp chamber 2 as shown in FIG. As shown in FIG. 6A, the front surface of the lamp has a lamp as if there are four or six light emitting semiconductor light sources 6 with respect to one light emitting semiconductor light source 6. The entire lens 4 appears to shine.

  Further, a part L3 of the light emitted from the light emitting unit 45 is incident on two or four third prism portions 29 with respect to one semiconductor-type light source 6 of the lamp lens 4 to enter the outer surface of the lamp lens 4. The light is refracted toward the outer surface and emitted in a diagonal direction on the front left and right. Thereby, when viewed from the eye point EP diagonally to the left and right with respect to the front of the daytime running lamp 1, the lamp lens 4 appears to shine.

  On the other hand, the light emitting units 45 of the six semiconductor light sources 6 are turned off. Then, as shown in FIG. 7A, external light (external light) L4 enters from the outer surface of the lamp lens 4 and is unevenly distributed from the fourth prism portion 30 on the inner surface of the lamp lens 4 into the lamp chamber 2. The light is emitted in any direction. The outside light L4 emitted in a non-uniform direction into the lamp chamber 2 is scattered on the scattering reflection surface (printing sheet 50) of the sheet 7 in the lamp chamber 2. As a result, when the daytime running lamp 1 is viewed, it appears as if the six semiconductor-type light sources 6 are also lit even though the six semiconductor-type light sources 6 are turned off.

  The vehicular lamp 5 in this embodiment is configured and operated as described above, and the effects thereof will be described below.

  In the vehicle lamp (daytime running lamp 1) in this embodiment, as shown in FIGS. 7 (A) and 9 (C), when the light emitting portions 45 of the six semiconductor-type light sources 6 are turned on, 6 A part of the light L1 and L2 emitted from the light emitting units 45 of the semiconductor light sources 6 is two first prism units 27 and two or four for one semiconductor light source 6 of the lamp lens 4. The light enters each of the second prism portions 28 and exits from the outer surface of the lamp lens 4 substantially perpendicularly to the outer surface. As a result, the vehicular lamp (daytime running lamp 1) in this embodiment is one semiconductor-type light source 6 in a state where the six semiconductor-type light sources 6 are lit up when viewed from the front when the six semiconductor-type light sources 6 are turned on. Appears on the outer surface of the lamp lens 4 as four or six corresponding to the two first prism portions 27 and the two or four second prism portions 28, respectively. For this reason, the vehicular lamp (daytime running lamp 1) in this embodiment can improve the visibility and contribute to traffic safety because the entire front surface of the lamp lens 6 appears to emit light uniformly. be able to.

  Further, in the vehicle lamp (daytime running lamp 1) in this embodiment, one semiconductor-type light source 6 appears to be four or six, so that a glossy feeling is obtained and the appearance is improved, and a high-grade is obtained. A feeling increases. In particular, the vehicular lamp (daytime running lamp 1) in this embodiment is daytime running that allows a driver or pedestrian of another vehicle (other vehicle) to visually recognize the presence of the vehicle (own vehicle) during the daytime. Useful as a lamp.

  Moreover, in the vehicle lamp (daytime running lamp 1) in this embodiment, the entire lamp lens 4 appears to emit light uniformly, so that one semiconductor-type light source that is lit and lit is on the outer surface of the lamp lens. The appearance is improved as compared with a vehicular lamp that can be seen only one (so-called spotlight vehicular lamp).

  In addition, the vehicular lamp (daytime running lamp 1) in this embodiment can be set to a small number of semiconductor light sources 6 because the entire lamp lens 4 appears to emit light uniformly. Cost can be reduced. In particular, the vehicular lamp (daytime running lamp 1) in this embodiment is suitable for a small type vehicular lamp in which the distance between the lamp lens 4 and the semiconductor light source 6 is small. Also, a vehicle lamp that uses a semiconductor-type light source with a large output (light quantity), and the vehicle needs to reduce the number of semiconductor-type light sources and increase the distance between the semiconductor-type light sources for heat dissipation. Suitable for lighting fixtures.

  In the vehicle lamp (daytime running lamp 1) in this embodiment, when six semiconductor light sources 6 are turned on and emitted, the light L3 emitted from the six semiconductor light sources 6 is 1 of the lamp lens 4. Each of the two semiconductor-type light sources 6 is incident on two or four third prism portions 29 and is refracted from the outer surface of the lamp lens 4 toward the outer surface and then emitted. As a result, the vehicular lamp (daytime running lamp 1) in this embodiment has side surfaces (left and right sides or left and right sideways sides), that is, daytime running when the six semiconductor light sources 6 are turned on and lighted. Since the lamp lens 4 (the side surface of the lamp lens 4) appears to shine when viewed from the eye point EP diagonally to the left and right with respect to the front of the lamp 1, not only the visibility in the front direction but also the visibility in the side direction is obtained. Can be improved, and can contribute to road safety.

  Further, in the vehicle lamp (daytime running lamp 1) in this embodiment, the outer surface of the lamp lens 4 is inclined downward from the center to the edge of the lamp lens 4 with respect to the plane 36 that is in contact with the center of the outer surface of the lamp lens 4. It is inclined at. As a result, in the vehicular lamp (daytime running lamp 1) in this embodiment, the light L3 emitted from the six semiconductor-type light sources 6 is four in number with respect to one semiconductor-type light source 6 of the lamp lens 4. When the light enters the third prism portion 29 and is refracted and emitted from the outer surface of the lamp lens 4 toward the outer surface, the light L4 is further refracted and emitted toward the outer surface, thereby further improving the visibility in the side surface direction. It can be improved and can contribute to road safety.

  In the vehicle lamp (daytime running lamp 1) in this embodiment, when the six semiconductor light sources 6 are turned on and emitted, the lights L1, L2, and L3 emitted from the six semiconductor light sources 6 are lamps. The light enters the first prism part 27, the second prism part 28, and the third prism part 29 as the first prism element part on the inner surface of the lens 4 and exits from the outer surface of the lamp lens 4 with the emission direction controlled, When the six semiconductor-type light sources 6 are not lit, the external light (external light) L4 enters from the outer surface of the lamp lens 4 and the fourth prism as the second prism element portion on the inner surface of the lamp lens 4 The light is emitted from the portion 30 into the lamp chamber 2 with the emission direction being controlled unevenly. As a result, the vehicular lamp (daytime running lamp 1) in this embodiment passes through the fourth prism portion 30 as the second prism element portion of the lamp lens 4 when the six semiconductor-type light sources emit no light. Since the external light L4 incident in the lamp chamber 2 is scattered, the six semiconductor-type light sources 6 are turned on and emit light, and the lamp lens 4 appears to emit light. Visibility at the time of lighting can be improved, which can contribute to traffic safety.

  Moreover, in the vehicle lamp (daytime running lamp 1) in this embodiment, external light (external light) L4 is incident from the outer surface of the lamp lens 4 when the six semiconductor-type light sources 6 are not lit. Then, since the emission direction is controlled to be nonuniform from the fourth prism portion 30 as the second prism element portion on the inner surface of the lamp lens 4 and is emitted into the lamp chamber 2, the inside of the lamp chamber 2 is outside the lamp lens 4. It becomes difficult to see, and the parts and objects in the lamp chamber 2 become inconspicuous, and the appearance is improved.

  In the vehicle lamp (daytime running lamp 1) in this embodiment, a sheet 7 having a print sheet 50 as a scattering reflection surface is disposed in the lamp chamber 2. As a result, in the vehicle lamp (daytime running lamp 1) in this embodiment, the external light L4 incident on the lamp chamber 2 through the lamp lens 4 is emitted when the six semiconductor light sources 6 are not lit. Since the light is scattered by the printed sheet 50 as the scattering reflection surface of the sheet 7 in the chamber 2, the visibility of the six semiconductor-type light sources 6 when the light is not lit can be further improved, which further contributes to traffic safety. be able to.

  Moreover, the vehicular lamp (daytime running lamp 1) in this embodiment uses six semiconductor-type light sources 6 by using metal color coating or metal color vapor deposition on the printed sheet 50 as the scattering reflection surface of the sheet 7. Since the metallic luster is obtained in the lamp chamber 2 not only during the non-light emission but also during the light emission, the appearance is improved and the visibility is further improved. Moreover, the vehicular lamp (daytime running lamp 1) in this embodiment increases the distance between the lamp lens 4 and the seat 7 by bringing the seat 7 closer to the circuit board 5 and away from the lamp lens 4. The depth of the interior of the lamp chamber 2 can be increased, and accordingly, the appearance is improved and the sense of quality is increased.

  In this embodiment, the vehicular lamp (daytime running lamp 1) includes a welding surface 24 at the entire peripheral edge of the lamp housing 3 and a peripheral edge of the lamp lens 4 to which the fitting walls 37 of the lamp lens 4 are welded to each other. Since the welding surface 38 can be covered and concealed from the outside (the side opposite to the lamp chamber 2), the appearance of the appearance can be improved.

  Moreover, in the vehicle lamp (daytime running lamp 1) in this embodiment, the fitting wall 37 of the lamp lens 4 covers and hides the welding surface 24 of the lamp housing 3 and the welding surface 38 of the lamp lens 4 from the outside. When water enters the lamp chamber 2 from outside the lamp chamber 2 through the welding surface 24 of the lamp housing 3 and the welding surface 38 of the lamp lens 4, the water is welded from the lamp chamber 2 to the lamp housing 3. 24 and the fitting wall 37 of the lamp lens 4 can be prevented from entering the welding surface 38 side of the lamp lens 4, and the water tightness can be improved accordingly.

  Further, in the vehicle lamp (daytime running lamp 1) in this embodiment, the fitting wall 37 of the lamp lens 4 is inclined in a divergent shape in the fitting direction. As a result, the vehicular lamp (daytime running lamp 1) in this embodiment is fitted when the fitting wall 37 of the lamp lens 4 is fitted to the inclined wall surface 23 of the entire peripheral edge of the lamp housing 3 from the outside. Since the fitting wall 37 of the lamp lens 4 inclined toward the end in the direction serves as a guide and positioning, the fitting operation between the lamp housing 3 and the lamp lens 4 is improved, and the manufacturing cost can be reduced.

  Moreover, in the vehicular lamp (daytime running lamp 1) in this embodiment, the fitting wall 37 at the entire peripheral edge of the lamp lens 4 is inclined toward the end in the fitting direction, so as shown in FIG. The distance 54 from the welding location of the welding surface 38 of the lamp lens 4 to the outermost side of the fitting wall 37 is increased, and accordingly, the thickness of the appearance of the lamp lens 4 is increased, the appearance is improved, and the luxury is increased. A feeling increases.

  Hereinafter, examples other than the above-described embodiment will be described. In the said Example, the daytime running lamp 1 is demonstrated as a vehicle lamp. However, in the present invention, the vehicle lamp may be a lamp other than the daytime running lamp, such as a clearance lamp or a turn signal lamp.

  In the above embodiment, six semiconductor light sources 6 are used. However, in the present invention, one semiconductor light source, 2 to 5 semiconductor light sources, or 7 or more semiconductor light sources may be used.

  Furthermore, in the above-described embodiment, the first prism portion 27, the second prism portion 28, the third prism portion 29, and the fourth prism portion 30 are arranged in the longitudinal direction of the lamp lens 4. However, in the present invention, the first prism portion, the second prism portion, the third prism portion, and the fourth prism portion may be arranged in the short direction of the lamp lens 4.

It is a perspective view of the daytime running lamp which shows the Example of the vehicle lamp concerning this invention. Similarly, it is explanatory drawing which shows a daytime running lamp. Similarly, it is a partially exploded sectional view showing a daytime running lamp. Similarly, it is a longitudinal sectional view showing a daytime running lamp. Similarly, it is an exploded sectional view showing a daytime running lamp. Similarly, it is explanatory drawing which shows a lamp lens. Similarly, it is explanatory drawing which shows a lamp lens. Similarly, it is explanatory drawing which shows the prism of a lamp lens. Similarly, it is explanatory drawing which shows a lamp lens. Similarly, it is a perspective view which shows a lamp housing. Similarly, it is a front view showing a circuit board. Similarly, it is explanatory drawing which shows a sheet | seat.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Daytime running lamp 2 Lamp chamber 3 Lamp housing 4 Lamp lens 5 Circuit board 6 Semiconductor type light source 7 Sheet 8 Storage part 9 Long hole 10 Grommet 11 Code 12 Tube 13 Solder 14 Boss part 15 Washer 16 Screw 17 Step part 18 Rib 19 Extension rib 20 Mounting boss portion 21 Flange portion 22 Notch 23 Inclined wall surface 24 Welding surface 25 Standing wall 26 Storage portion 27 First prism portion (first prism element portion)
28 Second prism part (first prism element part)
29 Third prism section (first prism element section)
30 Fourth prism section (second prism element section)
Reference Signs List 31 Vertical surface 32 Step rhythm portion 33 Step rhythm portion 34 Inclined prism portion 35 Valley prism portion 36 Plane contacting at the center of the outer surface of the lamp lens 37 Fitting wall 38 Welding surface 39 Bead portion 40 Concavity portion 41 Convex portion 42 Electronic component 43 Through-hole 44 Substrate 45 Light-emitting part 46 Terminal 47 Solder 48 Base sheet 49 Protection sheet 50 Printing sheet (scattering reflection surface)
51 Adhesive sheet 52 Hole 53 Notch 54 Distance from the welding location of the welding surface of the lamp lens to the outermost side of the fitting wall EP Eyepoint

Claims (3)

In a vehicle lamp that uses a semiconductor-type light source as a light source,
A lamp housing and a lamp lens that partition the lamp chamber;
One or more semiconductor-type light sources disposed in the lamp chamber via a circuit board;
With
The inner surface of the lamp lens is provided with a prism element that controls the emission direction of light from the semiconductor-type light source and incident from the inner surface of the lamp lens and emitted from the outer surface of the lamp lens. ,
The prism element is provided in a portion facing the semiconductor-type light source, and emits light from the semiconductor-type light source from an outer surface of the lamp lens substantially perpendicularly to the outer surface; A second prism portion provided on at least one side of both sides of the first prism portion and emitting light from the semiconductor-type light source from the outer surface of the lamp lens substantially perpendicularly to the outer surface; Have
The first prism portion and the second prism portion are perpendicular to an outer surface of the lamp lens and are perpendicular to a plane passing through the semiconductor-type light source in a direction connecting the first prism portion and the second prism portion. Two on each side,
A vehicular lamp characterized by the above. The prism elements are respectively provided between the two first prism portions and the two second prism portions, and light from the semiconductor-type light source is moved closer to the outer surface from the outer surface of the lamp lens. Each having two third prism portions to be emitted;
The vehicular lamp according to claim 1. The outer surface of the lamp lens is inclined from the center of the lamp lens to the edge with a downward gradient with respect to a plane that is in contact with the center of the outer surface of the lamp lens.
The vehicular lamp according to claim 2.

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