JP2013033622A - Lamp fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To radiate light from LEDs in a long linear line, while improving utilization efficiency of light flux.SOLUTION: The lamp fitting 1 includes LEDs 2, a light guide 3 arranged in front of the LEDs 2, and reflecting faces 41 arranged at either side of the light guide 3 in a Y direction. The light guide 3 includes a first incident face 311 opposed to each LED 2, and a second incident face 312 erected toward an LED 2 side from a peripheral edge of the first incident face 311. A part of ultraviolet rays incident from the second incident face 312 is made emitted to either side in a Y direction, and the rest of the ultraviolet rays is made irradiated toward front while it is branched to either side in an X direction to be irradiated on two first irradiated regions R1 separated in the X direction. The reflecting face 41 reflects forward the ultraviolet rays emitted to either side in the Y direction from the light guide 3 to be irradiated on a second irradiated region R2 that is a region between the two first irradiated regions R1.

Description

  The present invention relates to a lamp.

  2. Description of the Related Art Conventionally, as a lamp used in an ultraviolet irradiation device or the like, a lamp that emits light emitted from an LED (light emitting diode) in a long line shape is known, as described in Patent Document 1, for example.

  As shown in FIG. 6, the lamp 80 described in Patent Document 1 includes a plurality of LEDs 81 arranged in the left-right direction, a plurality of meniscus lenses 82 arranged in front of each LED 81, And a long cylinder lens 83 disposed in front of the meniscus lens 82. The entrance surface of each meniscus lens 82 is formed in a concave shape so that the distance from the exit portion of the corresponding LED 81 is constant, and the exit light from the LED 81 enters the entrance surface almost perpendicularly. ing. Therefore, the meniscus lens 82 emits the light forward while maintaining the illuminance distribution of the light emitted from the LED 81 at an angle.

  In this lamp 80, the light emitted from the LEDs 81,... Is condensed in the width direction (perpendicular to the paper surface) by the cylinder lens 83 while the illuminance distribution is uniformly maintained by the meniscus lenses 82,. Is irradiated in the shape of a long line in the left-right direction.

JP 2011-60798 A

  However, in general, light emitted from the LED is emitted substantially radially over a wide emission angle range. In the lamp 80 described in Patent Document 1, the light emitted from the LED 81 at a large emission angle is converted into a meniscus lens 82. Therefore, the utilization factor of the light flux is lowered. In this regard, if the incident surface of the meniscus lens 82 is made large so as to cover the LED 81, light having a large emission angle can be incident on the incident surface, but in this case, the light emitted from the meniscus lens 82 is also Since it spreads greatly over the entire circumference, it becomes difficult to irradiate the light in a line.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the lamp | ramp which can irradiate the light from LED in a elongate line shape, improving a light beam utilization rate compared with the past.

In order to solve the above problem, the invention according to claim 1 is a lamp.
An LED with its optical axis facing forward,
A light guide formed in an elongated shape in a direction orthogonal to the optical axis, and disposed in front of the LED;
Two reflective surfaces disposed on both sides of the light guide in the width direction orthogonal to both the longitudinal direction of the light guide and the optical axis;
With
The light guide is
A first incident surface that is provided at a position facing the LED and allows light emitted from the LED to enter the light guide;
A second incident surface that is erected from the peripheral edge of the first incident surface to the LED side, and that emits light emitted from the LED and directed laterally from the first incident surface into the light guide;
Have
While emitting a part of the light incident from the second incident surface to both sides in the width direction,
Among the light incident from the first incident surface and the second incident surface, the light excluding the part of the light is emitted forward while being branched to both sides in the longitudinal direction, and separated in the longitudinal direction 2 Irradiate one of the first irradiated areas,
The two reflecting surfaces reflect the light emitted from the light guide to both sides in the width direction forward, and are regions between the two first irradiated regions, the two first covered surfaces. Irradiation is performed to the irradiation region and the second irradiation region continuous in the longitudinal direction.

The invention according to claim 2 is the lamp according to claim 1,
The first incident surface is incident on the light guide body while refracting light emitted from the LED in an optical axis direction along the optical axis,
The light guide is
It is formed in a shape that is inclined so as to spread outward from the tip of the second incident surface toward the optical axis direction, and internally reflects light that has entered the light guide from the second incident surface in the optical axis direction. A first internal reflective surface;
The first internal reflection surface is disposed in the optical axis direction between the reflection surface portion excluding two reflection surface end portions located at both ends in the width direction and the first incident surface, and the reflection surface portion and the first reflection surface portion A second internal reflection surface that internally reflects light traveling in the optical axis direction from one incident surface so as to branch to both sides of the longitudinal direction;
A third internal reflection surface that is disposed on each side of the second internal reflection surface in the longitudinal direction and individually reflects the light internally reflected by the second internal reflection surface in the optical axis direction;
Light that is disposed in the optical axis direction of the third internal reflection surface and is internally reflected by the third internal reflection surface is emitted forward from the light guide body and is individually irradiated to the two first irradiated areas. Two first exit surfaces to be
Two fourth internal reflection surfaces that are arranged in the optical axis direction of the two reflection surface end portions and individually internally reflect the light internally reflected by the two reflection surface end portions outward in the width direction; ,
Lights that are disposed outside the two fourth internal reflection surfaces in the width direction and are internally reflected by the two fourth internal reflection surfaces are individually emitted outward from the light guide in the width direction. Two second exit surfaces;
Have
The two reflecting surfaces are arranged at positions facing the two second emitting surfaces, and individually reflect light emitted from the two second emitting surfaces obliquely forward to the second irradiated region. Irradiating.

The invention according to claim 3 is the lamp according to claim 1 or 2,
A housing having the two reflective surfaces;
The LED emits ultraviolet rays,
The housing is arranged so as to cover the periphery of the LED and the light guide, and is formed of a light shielding member. From the lamp to the area excluding the two first irradiated areas and the second irradiated area It is characterized by shielding the ultraviolet rays.

  According to the present invention, a part of the light emitted from the LED and incident from the first incident surface and the second incident surface into the light guide body is branched to both sides in the longitudinal direction of the light guide body. While being emitted forward and irradiated to two first irradiated regions that are separated in the longitudinal direction, the part of the light incident from the second incident surface is emitted to both sides in the width direction. After that, it is reflected forward by the two reflecting surfaces, and is irradiated to the second irradiated region that is between the two first irradiated regions and is continuous with the two first irradiated regions in the longitudinal direction. The light emitted from the LED can be irradiated in a long line shape in which the two first irradiated regions and the second irradiated region are connected.

  In addition, the light guide is erected on the LED side from the first incident surface provided at a position facing the LED, and the peripheral portion of the first incident surface, and is emitted from the LED and on the side of the first incident surface. And a second incident surface that allows light traveling in the direction to be incident on the light guide body, so that light emitted from the LED at a small emission angle is incident on the light guide body from the first incident surface, and a large emission angle from the LED. It is possible to make the light emitted from the second incident surface enter the light guide body. And as above-mentioned, these lights can be irradiated in a line form. Therefore, the luminous flux utilization factor can be improved as compared with the conventional case where the light emitted from the LED at a large emission angle cannot be used.

It is a front view of the lamp in embodiment. It is sectional drawing in the II-II line of FIG. It is sectional drawing in the III-III line of FIG. It is a perspective view of the light guide block in an embodiment. It is sectional drawing in the XZ plane of the light guide block in embodiment. It is sectional drawing of the conventional lamp.

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

FIG. 1 is a front (front) view of a lamp 1 in the present embodiment, and FIGS. 2 and 3 are cross-sectional views taken along lines II-II and III-III in FIG.
In the following description, the direction from the rear to the front along the front-rear direction of the lamp 1 is referred to as “Z direction”, and the two directions orthogonal to the Z direction and orthogonal to each other are “X direction” and “Y direction”. And

As shown in FIGS. 1 to 3, the lamp 1 is an ultraviolet irradiation device that irradiates ultraviolet rays to, for example, an ultraviolet curable resin (not shown), and includes a plurality of LEDs (light emitting diodes) 2. The light guide 3 is arranged in front of the two, and two housings 4 and 4 are provided.
Among these, LED2, ... is arranged in the X direction at equal intervals in the state mounted in the front surface of the common board | substrate 21. As shown in FIG. Each LED 2 emits ultraviolet light having a peak wavelength in the ultraviolet region (for example, 365 nm, 385 nm, etc.), and is disposed with the optical axis Ax directed forward along the Z direction. Ultraviolet rays are emitted substantially radially forward at the center.

  The light guide 3 is for irradiating ultraviolet rays emitted from the LEDs 2,. The light guide 3 is formed in an elongated shape in the X direction orthogonal to the optical axis Ax, specifically, a plurality of light guide blocks 30 for individually guiding ultraviolet rays from the LEDs 2. Are formed in a shape connected along the X direction.

FIG. 4 is a perspective view of the light guide block 30, and FIG. 5 is a cross-sectional view of the light guide block 30 on the XZ plane including the optical axis Ax.
As shown in FIGS. 3 to 5, the light guide block 30 is formed in a shape that is long in the X direction, and is formed symmetrically about each surface of the XZ plane and the YZ plane including the optical axis Ax. .

An incident portion 31 for allowing ultraviolet rays from the corresponding LED 2 to enter the light guide block 30 is formed at the rear portion of the light guide block 30 and in the center portion in the X direction (longitudinal direction). The incident portion 31 is formed in a truncated cone shape that protrudes rearward with the optical axis Ax as a rotational symmetry axis, and a concave portion 31a that opens rearward is formed at the rear end.
A convex (aspheric) first incident surface 311 bulging rearward is provided at a position facing the LED 2 with the optical axis Ax as a rotational symmetry axis at the bottom of the recess 31a. The first incident surface 311 is formed such that the LED 2 is located at the focal point thereof, and the emission angle of ultraviolet rays from the LED 2 to the outer peripheral edge of the first incident surface 311 is substantially a half-value angle. Of the ultraviolet rays that have been emitted, those having an emission angle of less than about a half-value angle are refracted along the Z direction to enter the light guide block 30 (light guide 3) while making it parallel light in the Z direction.
The inner peripheral surface of the recess 31 a is a second incident surface 312. The second incident surface 312 is a truncated conical surface erected from the peripheral edge of the first incident surface 311 to the LED 2 side (rear) so as to surround the LED 2, and the second incident surface 312 is the first of the ultraviolet rays emitted from the LED 2. A light that is directed to the side of one incident surface 311, that is, a light that has an emission angle of approximately a half-value angle or more is incident on the light guide block 30 (light guide 3).
The outer peripheral surface of the incident part 31 is a first internal reflection surface 313. The first internal reflection surface 313 is a truncated conical surface that is inclined so as to spread outward from the front end (rear end) of the second incident surface 312 in the Z direction (the side far from the optical axis Ax). Ultraviolet light that has entered the light guide block 30 from the incident surface 312 is internally reflected along the Z direction to be parallel light in the Z direction.

  In the front surface of the light guide block 30, a pair of second internal reflection surfaces 32 and 32 are recessed in the Z direction of the first incident surface 311 and the first internal reflection surface 313. The second internal reflection surfaces 32 and 32 are individually tilted at an angle of 45 degrees to both sides in the X direction with respect to the YZ plane including the optical axis Ax, with a line passing through the optical axis Ax and extending along the Y direction as a base line. Ultraviolet rays traveling in the Z direction from the first incident surface 311 and the first internal reflection surface 313 are internally reflected so as to branch to both sides in the X direction with the optical axis Ax as a boundary. However, both end positions of the second internal reflection surfaces 32, 32 in the Y direction (the width direction of the light guide 3) are the first internal reflection surfaces 313 on both sides in the Y direction on the YZ plane including the optical axis Ax. Is substantially the middle position in the Y direction (see FIG. 3), and the both end positions are constant along the X direction. Therefore, both ends of the first internal reflection surface 313 in the Y direction and are not positioned behind the second internal reflection surfaces 32 and 32 (that is, the second internal reflection surfaces 32 and 32 are in the Y direction). There are two reflection surface end portions 313a and 313a, and the ultraviolet rays internally reflected in the Z direction by the reflection surface end portions 313a and 313a are incident on the second internal reflection surfaces 32 and 32, respectively. Instead, the light is incident on fourth internal reflection surfaces 351 and 351 described later. Therefore, to be exact, the second internal reflection surfaces 32 and 32 are ultraviolet rays traveling in the Z direction from the reflection surface portions of the first internal reflection surface 313 excluding the reflection surface end portions 313a and 313a and the first incident surface 311. To reflect internally.

  Two third internal reflection surfaces 33 and 33 are formed on both sides of the incident portion 31 in the X direction on the rear surface of the light guide block 30. The two third internal reflection surfaces 33 and 33 are parallel to the closer one of the pair of second internal reflection surfaces 32 and 32 on both sides in the X direction of the incident portion 31, that is, in the YZ plane. It is formed so as to be inclined in the X direction at an angle of 45 degrees with respect to each other, and is continuous in the X direction with a step surface 33a orthogonal to the Z direction interposed therebetween. The third internal reflection surfaces 33 and 33 are located on both sides in the X direction of the second internal reflection surfaces 32 and 32, respectively, and the ultraviolet rays internally reflected on both sides in the X direction by the second internal reflection surfaces 32 and 32. Are internally reflected individually in the Z direction.

  First light exit surfaces 34 are formed on both sides in the X direction of the second internal reflection surfaces 32, 32 in the front surface of the light guide block 30. The first emission surface 34 is a surface in which a plurality of lens cuts are formed on a reference surface orthogonal to the Z direction. The plurality of lens cuts are each formed in a cylindrical surface shape having a generatrix along the Y direction and bulging in the Z direction, and are arranged in parallel in the X direction over the entire reference surface. The first emission surface 34 is located in the Z direction of the third internal reflection surfaces 33 and 33, and ultraviolet rays internally reflected in the Z direction by the third internal reflection surfaces 33 and 33 are X-direction by a plurality of lens cuts. The light is emitted forward from the light guide block 30 while being diffused to the first irradiated region R1. Here, the first irradiated region R1 is a region located in front of the first emitting surface 34 among irradiated surfaces on which an ultraviolet irradiation target (for example, an ultraviolet curable resin) is arranged (see FIG. 5). ).

Protruding portions 35 projecting to both sides in the Y direction are provided at both ends of the light guide block 30 in the X direction and in the Y direction, respectively. The protruding portion 35 is formed in a substantially flat plate shape orthogonal to the Y direction.
The rear half of the projecting portion 35 is integrated with the incident portion 31, and among the first internal reflection surface 313 of the incident portion 31, the reflection surface end 313 a located at the end in the Y direction is the projection portion 35. It is the rear end face.
A protruding portion 35 a is formed at the front end of the projecting portion 35 so as to protrude outward in the Y direction (outward of the lamp). The front end surface of the projecting portion 35 located at the base end portion of the overhang portion 35a is a fourth internal reflection surface 351 that is inclined outward in the Y direction at an angle of 45 degrees with respect to the XZ plane. The fourth internal reflection surface 351 is located in the Z direction of the reflection surface end 313a, and internally reflects the ultraviolet rays internally reflected in the Z direction by the reflection surface end 313a outward in the Y direction.
A tip end surface in the Y direction of the overhang portion 35 a is a second emission surface 352. The second emission surface 352 is a surface in which a rear half portion formed in a planar shape orthogonal to the Y direction and a front half portion formed in a curved surface shape projecting outward in the Y direction as it goes forward. It has become. The second emission surface 352 is located outward in the Y direction with respect to the fourth internal reflection surface 351, and ultraviolet rays internally reflected outward in the Y direction by the fourth internal reflection surface 351, and Y in the second half portion. The light is emitted from the light guide block 30 (light guide 3) along the direction, and is emitted from the light guide block 30 (light guide 3) in the Y direction while being refracted in the Z direction in the first half.

  As shown in FIGS. 1 and 3, the housings 4 and 4 are side walls of the lamp 1 erected on both sides in the Y direction of the light guide 3 over the entire length of the light guide 3 in the X direction. The front half of the inner side surfaces of the housings 4 and 4 are reflecting surfaces 41 and 41 in which the XZ plane is slightly inclined outward in the Y direction. The reflection surfaces 41 and 41 are opposed to the second emission surfaces 352 and 352 of the respective light guide blocks 30, and individually reflect the ultraviolet rays emitted from the second emission surfaces 352 and 352 obliquely forward, so that the second Irradiate the irradiated region R2 (see FIG. 5). Here, the second irradiated region R2 refers to the two first irradiated regions R1 and R1 in each light guide block 30 in the irradiated surface on which an ultraviolet irradiation target (for example, an ultraviolet curable resin) is disposed. An area between the two first irradiated areas R1, R1 and the X-direction. The reflecting surfaces 41 and 41 may be mirror reflecting surfaces subjected to aluminum vapor deposition or the like, or may be diffuse reflecting surfaces subjected to white coating or embossing.

  The housings 4 and 4 are arranged so as to cover the periphery of the LEDs 2,... And the light guide 3, and are formed of a light shielding member, and the first irradiated regions R1, R1 and the second irradiated region R2. The ultraviolet rays from the lamp 1 are shielded from the area except for. Here, the “periphery” of the LEDs 2,... And the light guide 3 does not include the front of the light guide 3, and at least a portion where there is a risk of unintentional ultraviolet leakage from the lamp 1. It only has to be included.

Subsequently, an ultraviolet irradiation mode in the lamp 1 will be described.
Since the lamp 1 functions in the same manner for each of the light guide block 30 and the corresponding parts (LED2, reflecting surfaces 41, 41), hereinafter, the ultraviolet light in the light guide block 30 and the corresponding part is described below. The irradiation mode will be described.

  As shown in FIG. 5, among the ultraviolet rays emitted from the LED 2, those having an emission angle of less than a half-value angle enter the light guide 3 through the first incident surface 311 while being converted into parallel light along the Z direction. To do. The ultraviolet light travels in the Z direction from the first incident surface 311 and enters the second internal reflection surfaces 32 and 32, and is branched by the second internal reflection surfaces 32 and 32 to both sides in the X direction with the optical axis Ax as a boundary. So that it is internally reflected. The ultraviolet rays branched to both sides in the X direction are internally reflected in the Z direction by the third internal reflection surfaces 33 and 33, respectively, and then emitted forward while being diffused in the X direction through the first emission surfaces 34 and 34. Two first irradiated regions R1 and R1 separated in the X direction are individually irradiated.

In addition, among the ultraviolet rays emitted from the LED 2, those having an emission angle of approximately a half-value angle or more are incident on the light guide 3 while being refracted through the second incident surface 312, and then are reflected by the first internal reflection surface 313 in the Z direction. Internally reflected.
Here, among the first internal reflection surface 313, the ultraviolet rays internally reflected by the reflection surface portions excluding the reflection surface end portions 313a and 313a at both ends in the Y direction are the same as the above-described ultraviolet rays whose emission angle is less than the half-value angle. Thus, the first irradiated regions R1 and R1 are irradiated. That is, the ultraviolet rays are internally reflected so as to branch to both sides in the X direction by the second internal reflection surfaces 32 and 32, and internally reflected in the Z direction by the third internal reflection surfaces 33 and 33, and then the first emission surface. The light is emitted forward while being diffused in the X direction through 34 and 34, and is irradiated to the first irradiated regions R1 and R1.

  On the other hand, as shown in FIG. 3, the ultraviolet rays internally reflected by the reflection surface end portions 313a and 313a at both ends in the Y direction of the first internal reflection surface 313 travel in the Z direction from the reflection surface end portions 313a and 313a. Then, the light enters the fourth internal reflection surfaces 351 and 351 of the projecting portion 35 and is individually internally reflected outward in the Y direction by the fourth internal reflection surfaces 351 and 351. The ultraviolet rays internally reflected by the fourth internal reflection surfaces 351 and 351 are individually emitted outward from the light guide 3 in the Y direction while being partially refracted in the Z direction through the second emission surfaces 352 and 352. Later, it is individually reflected obliquely forward by the reflecting surfaces 41, 41 of the housings 4, 4, and irradiated to the second irradiated region R2 between the two first irradiated regions R1, R1 (see FIG. 5).

  Thus, in each light guide block 30, the two first irradiated regions R1, R1 and the second irradiated region R2 are connected on the irradiated surface, and ultraviolet rays are irradiated in a long line shape in the X direction. At the same time, the first irradiated regions R1 are connected between the adjacent light guide blocks 30 and 30, whereby the lamp 1 as a whole is irradiated with ultraviolet rays in a longer line shape in the X direction.

  As described above, according to the lamp 1, a part of the ultraviolet rays that are emitted from the LED 2 and enter the light guide 3 from the first incident surface 311 and the second incident surface 312, excluding some ultraviolet rays, are in the X direction. Are emitted to the front while being branched to both sides of the first and second irradiated regions R1 and R1 spaced apart in the X direction, and part of the ultraviolet rays incident from the second incident surface 312 Is emitted to both sides in the Y direction and then reflected forward by the two reflecting surfaces 41 and 41, and is a region between the two first irradiated regions R1 and R1 and the two first irradiated regions. Irradiation is performed to the second irradiated region R2 connected in the X direction with R1, R1. Therefore, the ultraviolet rays emitted from the LED 2 can be irradiated in a long line shape in which the two first irradiated regions R1, R1 and the second irradiated region R2 are connected.

  In addition, the light guide 3 is erected on the LED 2 side from the peripheral portion of the first incident surface 311 provided at a position facing the LED 2, and is emitted from the LED 2 to be emitted from the first incident surface. Since it has the 2nd entrance plane 312 which injects the ultraviolet ray which goes to the side rather than 311 in the said light guide 3, ultraviolet rays radiate | emitted from LED2 with the small exit angle from the 1st entrance plane 311 in the light guide 3 UV light emitted from the LED 2 at a large emission angle can be made incident from the second incident surface 312 into the light guide 3. And as above-mentioned, these ultraviolet rays can be irradiated in a line form. Therefore, the luminous flux utilization factor can be improved as compared with the conventional case where the light emitted from the LED at a large emission angle cannot be used.

  In addition, the housings 4 and 4 are arranged so as to cover the periphery of the LEDs 2,... And the light guide 3 and are formed of a light shielding member, and are regions excluding the first irradiated region R1, R1 and the second irradiated region R2. Since the ultraviolet rays from the lamp 1 are shielded from light, it is possible to prevent ultraviolet rays from being irradiated to areas other than the desired irradiated areas (the first irradiated area R1 and the second irradiated area R2), and to ensure safety. Can do.

  The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.

  For example, in the above embodiment, the LEDs 2,... Emit ultraviolet light, but the LEDs 2,... May emit light other than ultraviolet light. Therefore, the lamp 1 only needs to irradiate light from the LEDs 2,... In a line, and may not be an ultraviolet irradiation device.

  Moreover, although the housings 4 and 4 are the side walls of the lamp 1 divided separately, the housings 4 may be integrally formed.

1 Light 2 LED
Ax Optical axis 3 Light guide 30 Light guide block 31 Incident part 311 First incident surface 312 Second incident surface 313 First internal reflection surface 313a Reflective surface end 32 Second internal reflection surface 33 Third internal reflection surface 34 First Outgoing surface 35 Projecting portion 351 Fourth internal reflecting surface 352 Second emitting surface 4 Housing 41 Reflecting surface R1 First irradiated region R2 Second irradiated region X direction (longitudinal direction)
Y direction (width direction)
Z direction (optical axis direction)

Claims (3)

An LED with its optical axis facing forward,
A light guide formed in an elongated shape in a direction orthogonal to the optical axis, and disposed in front of the LED;
Two reflective surfaces disposed on both sides of the light guide in the width direction orthogonal to both the longitudinal direction of the light guide and the optical axis;
With
The light guide is
A first incident surface that is provided at a position facing the LED and allows light emitted from the LED to enter the light guide;
A second incident surface that is erected from the peripheral edge of the first incident surface to the LED side, and that emits light emitted from the LED and directed laterally from the first incident surface into the light guide;
Have
While emitting a part of the light incident from the second incident surface to both sides in the width direction,
Among the light incident from the first incident surface and the second incident surface, the light excluding the part of the light is emitted forward while being branched to both sides in the longitudinal direction, and separated in the longitudinal direction 2 Irradiate one of the first irradiated areas,
The two reflecting surfaces reflect the light emitted from the light guide to both sides in the width direction forward, and are regions between the two first irradiated regions, the two first covered surfaces. A lamp characterized by irradiating an irradiation region and a second irradiation region continuous in the longitudinal direction. The first incident surface is incident on the light guide body while refracting light emitted from the LED in an optical axis direction along the optical axis,
The light guide is
It is formed in a shape that is inclined so as to spread outward from the tip of the second incident surface toward the optical axis direction, and internally reflects light that has entered the light guide from the second incident surface in the optical axis direction. A first internal reflective surface;
The first internal reflection surface is disposed in the optical axis direction between the reflection surface portion excluding two reflection surface end portions located at both ends in the width direction and the first incident surface, and the reflection surface portion and the first reflection surface portion A second internal reflection surface that internally reflects light traveling in the optical axis direction from one incident surface so as to branch to both sides of the longitudinal direction;
A third internal reflection surface that is disposed on each side of the second internal reflection surface in the longitudinal direction and individually reflects the light internally reflected by the second internal reflection surface in the optical axis direction;
Light that is disposed in the optical axis direction of the third internal reflection surface and is internally reflected by the third internal reflection surface is emitted forward from the light guide body and is individually irradiated to the two first irradiated areas. Two first exit surfaces to be
Two fourth internal reflection surfaces that are arranged in the optical axis direction of the two reflection surface end portions and individually internally reflect the light internally reflected by the two reflection surface end portions outward in the width direction; ,
Lights that are disposed outside the two fourth internal reflection surfaces in the width direction and are internally reflected by the two fourth internal reflection surfaces are individually emitted outward from the light guide in the width direction. Two second exit surfaces;
Have
The two reflecting surfaces are arranged at positions facing the two second emitting surfaces, and individually reflect light emitted from the two second emitting surfaces obliquely forward to the second irradiated region. The lamp according to claim 1, wherein the lamp is irradiated. A housing having the two reflective surfaces;
The LED emits ultraviolet rays,
The housing is arranged so as to cover the periphery of the LED and the light guide, and is formed of a light shielding member. From the lamp to the area excluding the two first irradiated areas and the second irradiated area The lamp according to claim 1, wherein the ultraviolet light is shielded.

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