JP2018026216A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To acquire a slender light emitting surface without greatly increasing the weight of a lighting fixture, in the lighting fixture which includes a lens for performing transmission control of light from a light source.SOLUTION: A lighting fixture includes a cylindrical member 40 for controlling emission light from a lens 30, and as the cylindrical member 40, emission light from the lens 30 is guided in a direction from a first opening part 40b toward a second opening part 40a in an internal space and it is emitted from the second opening 40a. Then, an inner peripheral surface of the cylindrical member 40 is constituted as reflection surfaces 40c1, 40c2, and also, an opening shape of the second opening part 40a is set to be a slender shape. By setting the opening shape of the second opening part 40a in the slender shape, a slender light emitting surface can be acquired as the lighting fixture 10. Also, by using the cylindrical member 40, weight becomes smaller compared to the case in which a tabular light guide body is used just like a conventional one.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lamp provided with a lens that controls transmission of light from a light source.

  2. Description of the Related Art Conventionally, as a configuration of a vehicular lamp such as a tail lamp or a clearance lamp, one having a lens that controls transmission of light from a light source is known.

  In “Patent Document 1”, such a lamp is configured such that light emitted from a lens is incident on a plate-shaped light guide disposed on the front side and emitted from a front end surface thereof. Have been described.

JP 2015-49977 A

  In the lamp described in “Patent Document 1”, since the shape of the front end surface of the plate-shaped light guide is set to be an elongated shape, it is possible to obtain an elongated light emitting surface as the lamp. Since the light guide is used, the weight of the lamp becomes large.

  The present invention has been made in view of such circumstances, and in a lamp provided with a lens that controls transmission of light from a light source, an elongated light emitting surface can be obtained without increasing the weight of the lamp. The purpose is to provide a lamp.

  The present invention is configured to have a cylindrical member for controlling the light emitted from the lens, and to achieve the above-described object by devising the configuration.

That is, the lamp according to the present invention is
In a lamp comprising a light source and a lens that controls transmission of light from the light source,
A cylindrical member for controlling the light emitted from the lens,
The cylindrical member guides the emitted light from the lens in a direction from the first opening to the second opening in the internal space of the cylindrical member so as to be emitted from the second opening of the cylindrical member. Configured,
The cylindrical member is characterized in that the inner peripheral surface of the cylindrical member is configured as a reflecting surface, and the opening shape of the second opening is set to be an elongated shape. .

  The type of the “light source” is not particularly limited, and for example, a light emitting element such as a light emitting diode or a laser diode, an incandescent bulb, or the like can be employed.

  The “cylindrical member” has an inner circumferential surface configured as a reflecting surface, but the entire area of the inner circumferential surface may not necessarily be configured as a reflecting surface.

  If the opening shape of the “second opening” is set to be an elongated shape, the specific direction in the longitudinal direction (that is, the direction in which the second opening extends in the elongated shape) or the specific opening shape thereof. Etc. are not particularly limited.

  The “elongated shape” means a shape in which the length on the long side is set to a value that is twice or more the length on the short side.

  The lamp according to the present invention includes a lens that controls transmission of light from a light source, and a cylindrical member for controlling light emitted from the lens. At this time, the cylindrical member transmits light emitted from the lens. The cylindrical member is configured to be guided in the direction from the first opening to the second opening and to be emitted from the second opening. The cylindrical member has an inner peripheral surface configured as a reflection surface. In addition, since the opening shape of the second opening is set to be an elongated shape, the following operational effects can be obtained.

  That is, the light emitted from the lens guided to the internal space of the cylindrical member can reach the second opening while being reflected on the inner peripheral surface thereof, and can be emitted from the second opening. In this case, since the opening shape of the second opening is set to be an elongated shape, an elongated light emitting surface can be obtained as a lamp.

  Further, since the cylindrical member can be reduced in weight as compared with a conventional plate-shaped light guide, an elongated light emitting surface can be obtained without increasing the weight of the lamp.

  Thus, according to the present invention, in a lamp provided with a lens that controls transmission of light from a light source, an elongated light emitting surface can be obtained without increasing the weight of the lamp.

  In the above configuration, if the cylindrical member is configured such that the first opening is positioned on the light source side of the lens, the cylindrical member can also be applied to direct light from the light source that has not entered the lens. The first opening can be guided to the internal space and reflected by the inner peripheral surface thereof to reach the second opening, thereby increasing the utilization efficiency of the light emitted from the light source.

  In the above configuration, as the cylindrical member, the width of the internal space of the cylindrical member gradually decreases from the first opening toward the second opening in a cross section orthogonal to the longitudinal direction of the second opening. With the configuration formed as described above, the light repeatedly reflected on the inner peripheral surface of the cylindrical member can reach the second opening as light greatly inclined in the direction along the cross section. It is possible to make the second opening appear to emit light more uniformly.

  In the above configuration, if the second lens for controlling transmission of the light emitted from the second opening is arranged in the second opening of the cylindrical member, the second opening is formed by the transmission control action. It is possible to make it appear to emit light more uniformly.

  In the above configuration, if the light source includes a plurality of light emitting elements mounted on a common substrate, the amount of light reaching the second opening can be increased with a relatively compact configuration. As a result, the second opening can be seen to emit light brightly.

  On the other hand, when such a configuration is adopted, it is difficult to accurately control the transmission of light emitted from all the light emitting elements using a lens. For example, if the transmission control by the lens is performed with high accuracy for the light emitted from one light emitting element among the plurality of light emitting elements, the transmission control by the lens is performed with high accuracy for the light emitted from other light emitting elements. Difficult to do. However, due to the presence of the cylindrical member, the light from each light emitting element emitted from the lens can reach the second opening while being reflected by the inner peripheral surface thereof. Can be obtained.

The front view which shows the lamp which concerns on one Embodiment of this invention II-II sectional view of FIG. III-III sectional view of FIG. Side sectional view showing the main components of the lamp exploded The perspective view which decomposes | disassembles and shows the cylindrical member of the said lamp Front view showing first and second modifications of the embodiment Front view showing third and fourth modifications of the embodiment

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a lamp 10 according to an embodiment of the present invention. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line III-III in FIG.

  As shown in these drawings, a lamp 10 according to the present embodiment is a clearance lamp provided at a left front end portion of a vehicle, and is provided in a lamp chamber formed by a lamp body 12 and a transparent translucent cover 14. The light source unit 20, the lens 30, the cylindrical member 40, the second lens 50, and the third lens 60 are incorporated.

  3, the direction indicated by X in FIG. 3 is “front” (also “front” as a vehicle), and the direction indicated by Y is “left direction” (also “ “Left direction” but “right direction” in front view of the lamp.

  The light-transmitting cover 14 is formed so as to extend obliquely rearward along a convex curve slightly bulging toward the front side from the vehicle width direction inner side (right side) to the vehicle width direction outer side in plan view. Has been.

  FIG. 4 is a side sectional view showing the main components of the lamp 10 in an exploded manner.

  Hereinafter, a specific configuration of each of these main components will be described.

  First, the configuration of the light source unit 20 will be described.

  The light source unit 20 includes five light emitting elements 22 as light sources and is detachably supported with respect to the lamp body 12.

  Each of the five light emitting elements 22 is a white light emitting diode having a square light emitting surface of the same size, and is common in a state where the four light emitting elements 22 are arranged in a cross shape with the one light emitting element 22 as the center. It is mounted on the substrate 24. The substrate 24 is supported on the front end face of the plug 26.

  The light source unit 20 is supported by a light source support hole 12 a formed in the rear wall portion of the lamp body 12 at the plug 26. This support is performed by rotating the plug 26 of the light source unit 20 by a predetermined amount in the state where the front end portion 26a of the plug 26 is inserted into the light source support hole 12a from the rear to be fitted to the rear wall portion. A packing 28 is attached to the plug 26 in order to ensure this fitting. The plug 26 includes a plurality of cooling fins 26b that function as heat radiating portions and a power feeding connector 26c.

  The light source unit 20 is configured such that the light emitting surface of each light emitting element 22 faces the front direction of the lamp when supported by the lamp body 12.

  Next, the configuration of the lens 30 will be described.

  The lens 30 is disposed on the optical axis Ax extending in the front-rear direction so as to pass through the light emission center of the light emitting element 22 located in the center in the vicinity of the front of the light source unit 20.

  The front surface 30a of the lens 30 is configured as a convex surface portion 30a1 in which a central region centered on the optical axis Ax swells forward, and the outer peripheral region is configured as a flat surface portion 30a2. At that time, the convex surface portion 30a1 has a substantially arcuate vertical sectional shape and a substantially planar horizontal sectional shape.

  The rear surface 30b of the lens 30 is configured as a convex surface portion 30b1 in which a central region centered on the optical axis Ax swells rearward, and regions on both upper and lower sides thereof are configured as prism portions 30b2. Each prism portion 30b2 has a vertical cross-sectional shape with a convex curve on the surface on the optical axis Ax side, and a linear vertical cross-sectional shape with the surface opposite to the optical axis Ax extending forward. ing. In addition, regions on the left and right sides of the convex surface portion 30b1 on the rear surface 30b are configured as conical surface portions 30b3 that spread forward.

  In this lens 30, the light emitted from each light emitting element 22 at an angle close to the front direction of the lamp is made incident from the convex portion 30b1 of the rear surface 30b and emitted from the convex portion 30a1 of the front surface 30a.

  At that time, the convex surface portion 30b1 of the rear surface 30b makes the light emitted from the light emitting element 22 located at the center incident as light substantially parallel to the optical axis Ax. The convex portion 30a1 of the front surface 30a emits the emitted light from the light emitting element 22 as convergent light in the vertical plane and as substantially parallel light in the horizontal plane.

  On the other hand, the light emitted from each of the light emitting elements 22 positioned around the optical path after being incident on the lens 30 from the convex surface portion 30b1 of the rear surface 30b is shifted by the amount of the positional deviation from the light emitting element 22 positioned at the center. For this reason, the direction of the emitted light from the convex surface portion 30a1 of the front surface 30a is inclined in the direction closer to the optical axis Ax than the emitted light from the light emitting element 22 located at the center.

  Further, in this lens 30, light emitted from each light emitting element 22 at an angle greatly inclined in the up and down direction than the angle incident on the convex surface portion 30b1 of the rear surface 30b is a convex surface on the optical axis Ax side in each prism portion 30b2. So that the light is incident on the lens 30 and totally reflected forward on the planar surface opposite to the optical axis Ax in each prism portion 30b2, and then emitted from the flat portion 30a2 of the front surface 30a. It has become.

  The lens 30 is formed with a pair of upper and lower flange portions 30c and is supported by the cylindrical member 40 at both flange portions 30c.

  Next, the configuration of the cylindrical member 40 will be described.

  The cylindrical member 40 is a cylindrical member for controlling the light emitted from each light emitting element 22 emitted from the lens 30 and includes a half-shaped upper half 40A and a lower half 40B.

  FIG. 5 is a perspective view showing the tubular member 40 disassembled into an upper half 40A and a lower half 40B.

  As shown in the figure, the upper half 40A and the lower half 40B have a vertically symmetrical shape, and both are configured as a resin molded product. The tubular member 40 is supported by the lamp body 12 in a state where the lower end surface of the upper half 40A and the upper end surface of the lower half 40B are abutted.

  As shown in FIGS. 1-3, this cylindrical member 40 has the 1st opening part 40b in the rear-end side, and has the 2nd opening part 40a in the front-end side.

  As shown in FIG. 1, the first opening 40 b has a slightly elongated rectangular opening shape centered on the optical axis Ax when the lamp is viewed from the front. As shown in FIGS. 2 and 3, the first opening 40b is formed along a vertical plane perpendicular to the optical axis Ax at substantially the same position as the substrate 24 of the light source unit 20 in the front-rear direction.

  On the other hand, the second opening 40a has a horizontally-long rectangular opening shape centered on the optical axis Ax in the lamp front view. Specifically, the vertical width of the second opening 40a is set to a value that is 2/3 or less of the vertical width of the first opening 40b (for example, about 1/2). Further, the left-right width of the second opening 40a is set to a value that is twice or more of the vertical width (more specifically, a value that is four times or more (for example, a value that is about five times)). The second opening 40a is formed so as to incline toward the rear side along a convex curve slightly bulging toward the front side from the vehicle width direction inner side to the vehicle width direction outer side in plan view. ing.

  The internal space of the tubular member 40 has a vertical width that gradually decreases from the first opening 40b toward the second opening 40a, and a horizontal width thereof from the first opening 40b toward the second opening 40a. It is formed to gradually widen.

  This internal space is formed by the upper wall portion 40Aa of the upper half 40A and the pair of left and right side wall portions 40Ab, and the lower wall portion 40Ba and the pair of left and right side wall portions 40Bb of the lower half 40B. Since both have symmetrical shapes, first, a specific configuration of the lower half 40B will be described.

  The lower wall portion 40Ba of the lower half 40B is an inclined surface portion that extends in a flat plate shape obliquely upward from the portion located slightly forward of the first opening portion 40b to the portion located near the second opening portion 40a. The part located in the front and back both sides is comprised as a horizontal surface part extended along a horizontal surface.

  A groove 40Bc extending linearly in the vehicle width direction is formed on the inner surface of the front end position of the rear horizontal surface portion, and the inner surface of the rear end position of the front horizontal surface portion is formed in the vehicle width direction. A groove 40Bd extending in a curved line is formed.

  The groove 40Bc is formed with a certain length around the optical axis Ax. And the flange part 30c of the lower side of the lens 30 is engage | inserted by this groove part 40Bc. On the other hand, the groove 40Bd is formed over the entire length along the second opening 40a. And the lower end part of the 2nd lens 50 is engage | inserted by this groove part 40Bd.

  Each side wall portion 40Bb of the lower half 40B has a focal point at the intersection of the light emitting surface of the light emitting element 22 located at the center and the optical axis Ax in plan view, and extends along a parabola with the optical axis Ax as an axis. The vertical cross-sectional shape is set to be linear.

  However, in each side wall 40Bb, the inner surface of the portion located in the first opening 40b is chamfered along a vertical plane parallel to the optical axis Ax, and the portion located in the second opening 40a is the second. It is configured as a flange portion for supporting the lens 50.

  A flat-plate-like flange portion 40Be projecting to the outer surface side is formed at a position near the front end portion in each side wall portion 40Bb. The upper surface of each flange portion 40Be is flush with the upper end surface of each side wall portion 40Bb.

  The inner surface of the inclined surface portion in the lower wall portion 40Ba of the lower half 40B and the inner surface of the curved surface portion in each side wall portion 40Bb (regions indicated by meshes in FIG. 5) are subjected to a reflective surface treatment by aluminum vapor deposition or the like. The reflecting surfaces 40c1 and 40c2 are respectively configured.

  On the other hand, the upper wall portion 40Aa of the upper half 40A, the pair of left and right side wall portions 40Ab, the groove portions 40Ac and 40Ad, and the flange portions 40Ae have the same configuration.

  The tubular member 40 is positioned on the lamp body 12 in a state where the flange portions 40Ae of the upper half 40A and the flange portions 40Be of the lower half 40B are overlapped. Further, the tubular member 40 is positioned on the lamp body 12 also at the rear end portions of the upper wall portion 40Aa of the upper half 40A and the lower wall portion 40Ba of the lower half 40B.

  The cylindrical member 40 directly guides the light from each light emitting element 22 emitted from the lens 30 to the second opening 40a in the inner space, and the upper wall 40Aa and the lower half 40B of the upper half 40A. The reflection surface 40c1 formed on the lower wall portion 40Ba is reflected once or a plurality of times and then guided to the second opening 40a.

  In addition, the cylindrical member 40 emits light emitted from each light emitting element 22 at an angle greatly inclined in the left-right direction from the light incident on the rear surface 30b of the lens 30 in the inner space of the upper half 40A and the lower half 40B. The reflection surface 40c2 formed on each of the side surfaces 40Ab and 40Bb reflects the light forward and guides it to the second opening 40a.

  Next, the configuration of the second lens 50 will be described.

  The second lens 50 is disposed in the second opening 40 a of the cylindrical member 40. Specifically, the second lens 50 extends in the vehicle width direction along the second opening 40a, and the upper and lower ends thereof are fitted in the grooves 40Ad and 40Bd of the upper half 40A and the lower half 40B. It is supported by the cylindrical member 40.

  A plurality of lens elements 50 s are formed on the front surface of the second lens 50. Each lens element 50s is configured as a convex cylindrical lens extending in the vertical direction, and is continuously formed in the vehicle width direction. Each lens element 50s controls the transmission of the light reaching the second lens 50 as light that diffuses in the left-right direction.

  Next, the configuration of the third lens 60 will be described.

  The third lens 60 is disposed on the front end surface of the second opening 40 a of the cylindrical member 40. Specifically, the third lens 60 extends in the vehicle width direction along the second opening 40a, and the upper half 40A and the lower half of the upper and lower flange portions 60a extending rearward from both upper and lower ends thereof. 40B is inserted from the front side so as to be sandwiched from both the upper and lower sides.

  A plurality of lens elements 60 s are formed on the front surface of the third lens 60. Each lens element 60s is configured as a narrow convex cylindrical lens extending in the horizontal direction, and is formed at regular intervals in the vertical direction.

  The third lens 60 has a function of transmitting and controlling a part of the light reaching each lens element 60s as light that diffuses in the vertical direction, but mainly to make the cylindrical member 40 difficult to see from the front side. It is configured as a decorative lens.

  Next, the contents of light control by the tubular member 40 will be described.

  As described above, the light emitted from the light emitting element 22 located at the center and incident on the lens 30 from the convex surface portion 30b1 of the rear surface 30b is transmitted from the convex surface portion 30a1 of the front surface 30a to the optical axis in the vertical plane. As convergent light close to Ax, it is emitted as light substantially parallel to the optical axis Ax in the horizontal plane, so that most of it is reflected without being reflected by the reflecting surfaces 40c1 located on the upper and lower sides of the internal space of the cylindrical member 40. It reaches the second opening 40a.

  On the other hand, the light emitted from each light emitting element 22 located in the periphery is shifted in the optical path of the incident light from the convex portion 30b1 of the rear surface 30b by the amount of the positional deviation from the light emitting element 22 located in the center, and the front surface 30a. Since the direction of the emitted light from the convex surface portion 30a1 is inclined in the direction closer to the optical axis Ax than the emitted light from the light emitting element 22 located at the center, most of the reflective surface 40c1 of the cylindrical member 40 And reaches the second opening 40a after being reflected once or a plurality of times.

  Further, the light emitted from each light emitting element 22 at an angle that is largely inclined in the horizontal direction than the angle incident on the rear surface 30 b of the lens 30 reaches the reflection surfaces 40 c 2 positioned on both the left and right sides of the internal space of the cylindrical member 40. Then, the light reaches the second opening 40a after being reflected by the reflecting surface 40c2.

  At that time, the light emitted from the light emitting element 22 located at the center and reflected by each reflecting surface 40c2 reaches the second opening 40a as light substantially parallel to the optical axis Ax in plan view, and is positioned on both the left and right sides thereof. The emitted light from the light emitting element 22 that reaches the second opening 40a is directed to the right and left sides as much as the positional deviation from the light emitting element 22 located at the center.

  The light that has thus reached the second opening 40a is incident on the second lens 50 disposed in the second opening 40a, and is emitted forward as light that is further diffused in the left-right direction by the lens element 50s. . Although the second lens 50 does not have a vertical light diffusion function, the light incident on the second lens 50 after being reflected by the reflecting surface 40c1 of the cylindrical member 40 has a considerably large incident angle in the vertical plane. Therefore, the light is emitted forward from the second lens 50 as light that diffuses greatly in the vertical direction.

  Then, the emitted light from the second lens 50 is irradiated toward the front of the lamp through the third lens 60 and the translucent cover 14. Since the third lens 60 is formed with a plurality of lens elements 60s extending in the horizontal direction, part of the light is further emitted toward the front of the lamp as light that diffuses in the vertical direction.

  Next, the effect of this embodiment is demonstrated.

  The lamp 10 according to the present embodiment includes a lens 30 that controls transmission of light from five light emitting elements 22 as light sources, and a cylindrical member 40 that controls emitted light from the lens 30, and At this time, the cylindrical member 40 is configured to guide the emitted light from the lens 30 in the direction toward the second opening 40a from the first opening 40b in the internal space, and to emit the light from the second opening 40a. In this cylindrical member 40, the upper and lower side portions of the inner peripheral surface are configured as reflecting surfaces 40c1, and the opening shape of the second opening 40a is set to a horizontally long rectangular shape (elongated shape). Therefore, the following effects can be obtained.

  That is, the light emitted from the lens 30 guided to the internal space of the cylindrical member 40 reaches the second opening 40a while being reflected by the pair of upper and lower reflecting surfaces 40c1, and is emitted from the second opening 40a. be able to. At this time, since the opening shape of the second opening 40 a is set to be a horizontally long rectangular shape, a long and light emitting surface can be obtained as the lamp 10.

  Moreover, since the cylindrical member 40 can reduce weight compared with the plate-shaped light guide like the past, it can obtain an elongate light emission surface, without increasing the weight of the lamp 10 so much.

  As described above, according to the present embodiment, in the lamp 10 including the lens 30 that controls the transmission of light from the five light emitting elements 22, an elongated light emitting surface can be obtained without increasing the weight of the lamp 10.

  In addition, the cylindrical member 40 of the present embodiment is formed such that the first opening 40b is positioned on the five light emitting element 22 sides with respect to the lens 30, and thus each light emitting element that has not entered the lens 30 The direct light from 22 is also led from the first opening 40b of the cylindrical member 40 to the internal space and reflected by the reflection surfaces 40c2 constituting the left and right side portions of the inner peripheral surface thereof, and the second opening 40a. Thus, the utilization efficiency of the light emitted from each light emitting element 22 can be increased.

  At that time, the first opening 40b is formed along the vertical plane perpendicular to the optical axis Ax at substantially the same position as the substrate 24 on which the five light emitting elements 22 are mounted in the front-rear direction. Substantially the entire amount of light emitted from each light emitting element 22 that has not entered can be guided to the internal space of the tubular member 40.

  In addition, the vertical width of the internal space of the cylindrical member 40 (the width in the cross section perpendicular to the longitudinal direction of the second opening 40a) gradually decreases from the first opening 40b toward the second opening 40a. Thus, the light repeatedly reflected by the pair of upper and lower reflecting surfaces 40c1 can be made to reach the second opening 40a as light greatly inclined in the vertical direction, whereby the second opening 40a. Can appear to emit light more uniformly.

  Furthermore, in the present embodiment, since the second lens 50 that controls transmission of the light emitted from the second opening 40a is disposed in the second opening 40a of the cylindrical member 40, the transmission control action thereof allows It is possible to make the second opening 40a appear to emit light more uniformly.

  In the present embodiment, since the third lens 60 is arranged as a decorative lens on the front end face of the second opening 40a of the cylindrical member 40, the cylindrical member 40 may be difficult to see from the front side. This can improve the design of the lamp 10.

  The cylindrical member 40 of the present embodiment is composed of an upper half 40A and a lower half 40B. A pair of upper and lower flange portions 30c of the lens 30 are fitted into the groove portions 40Ac and 40Bc, and a second lens is inserted into the groove portions 40Ad and 40Bd. Since the upper and lower end portions of 50 are fitted, the positioning support of the lens 30 and the second lens 50 by the cylindrical member 40 can be easily performed.

  In particular, since the lens 30 is supported by the cylindrical member 40 at a pair of upper and lower flange portions 30c, the lens 30 is inclined at a larger angle in the left-right direction than the angle at which the light emitting element 22 enters the rear surface 30b of the lens 30. It is possible to prevent the emitted light from reaching the pair of left and right reflecting surfaces 40c2 unintentionally by the support structure of the lens 30. Thus, the light emitted from each light emitting element 22 can be used. Efficiency can be increased.

  Since the lamp 10 according to the present embodiment includes the five light emitting elements 22 mounted on the common substrate 24 as the light source, the amount of light reaching the second opening 40a can be reduced with a relatively compact configuration. Thus, the second opening 40a can be seen to emit light brightly.

  On the other hand, when such a configuration is adopted, it is difficult to accurately control the transmission of light emitted from all the light emitting elements 22 by the lens 30. That is, although it is possible to accurately control the transmission of light emitted from the light emitting element 22 located in the center by the lens 30, the light emitted from the surrounding light emitting element 22 is transmitted through the lens 30. It is difficult to perform control with high accuracy. However, the presence of the cylindrical member 40 allows the light from each light emitting element 22 emitted from the lens 30 to reach the second opening 40a while being reflected by the pair of upper and lower reflecting surfaces 40c1. Thus, a long and bright light emitting surface can be obtained.

  In addition, since the five light emitting elements 22 are configured as a part of the light source unit 20 that can be attached to and detached from the lamp body 12, it is possible to easily replace them as necessary.

  In the above-described embodiment, the second opening 40a of the cylindrical member 40 has been described as having a horizontally-long rectangular opening shape. However, the cylindrical member 40 has an opening shape extending in an elongated shape in other directions. It is also possible.

  In the said embodiment, although demonstrated as what the 2nd lens 50 and the 3rd lens 60 are arrange | positioned in the 2nd opening part 40a of the cylindrical member 40, the structure in which any one or both does not exist among these. It is also possible.

  In the above embodiment, the case where the lamp 10 is a clearance lamp provided at the left front end portion of the vehicle has been described. However, vehicle lamps other than the clearance lamp (for example, daytime running lamp, tail lamp, stop lamp, turn signal) Lamp, room lamp, etc.), and further, a lamp other than the vehicular lamp may be used.

  Next, a modification of the above embodiment will be described.

  First, a first modification of the above embodiment will be described.

  Fig.6 (a) is a front view which shows the principal part of the lamp | ramp 110 which concerns on this modification.

  The basic configuration of the lamp 110 is the same as that of the lamp 10 of the above embodiment, but the configuration of the light source unit 120 is different from the light source unit 20 of the above embodiment.

  In other words, the light source unit 120 includes four light emitting elements 122. These four light emitting elements 122 are mounted on a common substrate 124 in a state of being disposed at a square corner centered on the optical axis Ax, and this substrate 124 is supported on the front end face of the plug 126.

  The lamp 110 according to the present modification also includes a plurality of light emitting elements 122 as the light source unit 120. Therefore, although not as in the case of the above-described embodiment, the first member of the cylindrical member 40 has a relatively compact configuration. It is possible to make the two openings 40a appear to emit light brightly.

  Next, a second modification of the above embodiment will be described.

  FIG.6 (b) is a front view which shows the principal part of the lamp 210 which concerns on this modification.

  The basic configuration of the lamp 210 is the same as that of the lamp 10 of the above embodiment, but the configuration of the light source unit 220 is different from that of the light source unit 20 of the above embodiment.

  That is, the light source unit 220 includes three light emitting elements 222. These three light emitting elements 222 are composed of a light emitting element 222 disposed on the optical axis Ax and a pair of light emitting elements 222 disposed on the left and right sides thereof. These three light emitting elements 222 are mounted on a common substrate 224, and this substrate 224 is supported on the front end face of the plug 226.

  The lamp 210 according to the present modification also includes a plurality of light emitting elements 222 as the light source unit 220. Therefore, although not as in the case of the above-described embodiment, the first member of the tubular member 40 is configured with a relatively compact configuration. It is possible to make the two openings 40a appear to emit light brightly.

  Next, a third modification of the above embodiment will be described.

  Fig.7 (a) is a front view which shows the principal part of the lamp | ramp 310 which concerns on this modification.

  The basic configuration of the lamp 310 is the same as that of the lamp 10 of the above embodiment, but the configuration of the cylindrical member 340 is different from the cylindrical member 40 of the above embodiment.

  That is, this cylindrical member 340 also includes an upper half 340A and a lower half 340B having symmetrical shapes, and has a first opening 340b on the rear end side and a second opening 340a on the front end side. doing.

  However, the first opening 340b of the cylindrical member 340 has a circular shape centered on the optical axis Ax. Further, the second opening 340a of the tubular member 340 has a horizontally long opening shape centered on the optical axis Ax in the front view of the lamp, and both left and right end portions thereof are formed in an arc shape. .

  As in the case of the above embodiment, the internal space of the cylindrical member 340 gradually decreases in width from the first opening 340b toward the second opening 340a, and the left-right width thereof decreases to the first opening 340b. To the second opening 340a so as to gradually widen.

  This internal space is formed by an upper wall portion 340Aa of the upper half 340A and a pair of left and right side wall portions 340Ab, a lower wall portion 340Ba of the lower half 340B and a pair of left and right side wall portions 340Bb.

  The inner surfaces of the upper wall portion 340Aa of the upper half 340A and the lower wall portion 340Ba of the lower half 340B are configured as a reflective surface 340c1, and the inner surfaces of the side wall portions 340Ab of the upper half 340A and the side wall portions 340Bb of the lower half 340B. Is configured as a reflective surface 340c2. At this time, the left and right ends of the second opening 340a are formed in an arc shape, and the reflecting surface 340c2 is formed in an arc-shaped vertical cross-sectional shape.

  Even in the case of adopting the configuration of this modification, it is possible to obtain the same effects as those of the above embodiment.

  In this modification, since the opening shape of the second opening 340a is different from that in the above embodiment, the lamp design can be different from that in the above embodiment.

  In the present modification, the way in which the light from each light emitting element 22 is reflected by the pair of left and right reflecting surfaces 340c2 of the cylindrical member 340 is different from that in the above embodiment, and therefore the second opening portion thereof. The light emission method of 340a can be different from that in the above embodiment.

  Next, the 4th modification of the said embodiment is demonstrated.

  FIG.7 (b) is a front view which shows the principal part of the lamp 410 which concerns on this modification.

  The basic configuration of the lamp 410 is the same as that of the lamp 10 of the above embodiment, but the configuration of the cylindrical member 440 is different from the cylindrical member 40 of the above embodiment.

  That is, this cylindrical member 440 also includes an upper half 440A and a lower half 440B, and has a first opening 440b on the rear end side and a second opening 440a on the front end side thereof.

  The first opening 440b has the same opening shape as in the above embodiment. On the other hand, the second opening portion 440a has a horizontally long opening shape centered on the optical axis Ax in the front view of the lamp, but is curved in an arc shape upward from the center portion toward both left and right end portions. It is formed to extend.

  As in the case of the above embodiment, the internal space of the tubular member 440 gradually decreases in width from the first opening 440b toward the second opening 440a, and the left-right width thereof decreases to the first opening 440b. To the second opening 440a so as to gradually widen.

  This internal space is formed by the upper wall portion 440Aa of the upper half 440A and the pair of left and right side wall portions 440Ab, the lower wall portion 440Ba of the lower half 440B, and the pair of left and right side wall portions 440Bb.

  The inner surfaces of the upper wall portion 440Aa of the upper half 440A and the lower wall portion 440Ba of the lower half 440B are configured as a reflective surface 440c1, and the inner surfaces of the side wall portions 440Ab of the upper half 440A and the side wall portions 440Bb of the lower half 440B. Is configured as a reflective surface 440c2. At this time, the second opening 440a is formed so as to be curved and extend upward in a circular arc shape from the center to the left and right ends, and the reflection surface 440c1 on the upper half 440A side. And the reflecting surface 440c1 on the lower half 440B side are formed of curved surfaces having different shapes.

  Even in the case of adopting the configuration of this modification, it is possible to obtain the same effects as those of the above embodiment.

  In this modification, since the opening shape of the 2nd opening part 440a differs from the case of the said embodiment, a lamp design can be made different from the case of the said embodiment.

  Further, in the modified example, the manner of reflection of each light emitting element 22 on the pair of upper and lower reflecting surfaces 440c1 of the cylindrical member 440 is different from that in the above embodiment, and thus the light emission of the second opening 440a is made. The method can be different from that in the above embodiment.

  In addition, the numerical value shown as a specification in the said embodiment and its modification is only an example, and of course, you may set these to a different value suitably.

  The invention of the present application is not limited to the configuration described in the above-described embodiment and its modifications, and a configuration with various other changes can be adopted.

10, 110, 210, 310, 410 Lamp 12 Lamp body 12a Light source support hole 14 Translucent cover 20, 120, 220 Light source unit 22, 122, 222 Light emitting element (light source)
24, 124, 224 Substrate 26, 126, 226 Plug 26a Front end portion 26b Cooling fin 26c Connector 28 Packing 30 Lens 30a Front surface 30a1, 30b1 Convex portion 30a2 Planar portion 30b Rear surface 30b2 Prism portion 30b3 Conical surface portion 30c Flange portion 40, 340 Cylindrical member 40a, 340a, 440a Second opening 40b, 340b, 440b First opening 40c1, 40c2, 340c1, 340c2, 440c1, 440c2 Reflecting surface 40A, 340A, 440A Upper half 40Aa, 340Aa, 440Aa Upper wall 40Ab , 40Bb, 340Ab, 340Bb, 440Ab, 440Bb Side wall portion 40Ac, 40Ad, 40Bc, 40Bd Groove portion 40Ae, 40Be Flange portion 40B, 340B, 440B Bottom -Safe 40Ba, 340Ba, 440Ba lower wall portion 50 and the second lens 50s, 60s lens element 60 a third lens 60a flange Ax optical axis

Claims (5)

In a lamp comprising a light source and a lens that controls transmission of light from the light source,
A cylindrical member for controlling the light emitted from the lens,
The cylindrical member guides the emitted light from the lens in a direction from the first opening to the second opening in the internal space of the cylindrical member so as to be emitted from the second opening of the cylindrical member. Configured,
The tubular member is characterized in that an inner peripheral surface of the tubular member is configured as a reflecting surface, and an opening shape of the second opening is set to be an elongated shape.   The lamp according to claim 1, wherein the cylindrical member is formed such that the first opening is positioned on the light source side with respect to the lens.   The cylindrical member is configured such that the width of the internal space of the cylindrical member gradually decreases from the first opening toward the second opening in a cross section orthogonal to the longitudinal direction of the second opening. The lamp according to claim 1, wherein the lamp is formed.   The lamp according to any one of claims 1 to 3, wherein a second lens that controls transmission of light emitted from the second opening is disposed in the second opening.   The lamp according to any one of claims 1 to 4, comprising a plurality of light emitting elements mounted on a common substrate as the light source.

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