Lamp body
The headlamp design enhances visibility and stability by using a central recess and strategic light source placement, addressing the challenges of size and functionality in multi-functional headlamps.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- HONDA MOTOR CO LTD
- Filing Date
- 2024-12-19
- Publication Date
- 2026-07-01
Smart Images
Figure 2026109029000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a lamp body.
Background Art
[0002] Conventionally, a headlamp having functions of high beam, low beam, and DRL is known. (For example, see Patent Document 1). The headlight of Patent Document 1 has a smoothly curved front surface and includes light sources for high beam and low beam inside. The light sources are arranged vertically side by side, and the light emission state and light quantity of the light sources are controlled according to the light emission in high beam, low beam, and DRL.
Prior Art Documents
Patent Documents
[0003] The lamp body comprises a first light source, a second light source, and a third light source, each emitting light as either a high beam or a low beam, surrounded by a base member and an outer lens. A gap is formed in the left-right center of the lamp body, spaced apart in the left-right direction. The first light source and the third light source emit light as either a high beam or a low beam, while the second light source emits light as either a high beam or a low beam. In a front view of the lamp body, the first light source, the second light source, and the third light source are arranged in that order from the left-right outer edge of the lamp body, with the third light source provided between the gap and the second light source. [Effects of the Invention]
[0006] According to the present invention, it is possible to provide a light fixture that improves visibility while suppressing excessive size, and while also improving steering stability. [Brief explanation of the drawing]
[0007] [Figure 1] This diagram shows the structure around the headlights of a saddle-type vehicle. [Figure 2] This is a front view of the headlight. [Figure 3] This is a front view of the headlight with the outer lens, the extension on the left side of the headlight, and the inner lens on the left side of the headlight removed. [Figure 4] This is a cross-sectional view taken along line IV-IV in Figure 2. [Figure 5] Figure 2 is a cross-sectional view along the VV line. [Figure 6] This is a cross-sectional view taken along the line VI-VI in Figure 2. [Figure 7] This is an enlarged view showing the area around the opening of the third lamp chamber. [Figure 8] Figure 3 is a front view of a headlight with an inner lens. [Modes for carrying out the invention]
[0008] Embodiments of the present invention will be described below with reference to the drawings. In the description, directions such as front, back, left, right, and up and down are the same as the directions relative to the saddle-type vehicle body in Figure 1 unless otherwise specified. In each figure, the symbol FR indicates the front of the vehicle body, the symbol UP indicates the top of the vehicle body, and the symbol LH indicates the left side of the vehicle body.
[0009] [Embodiment] Figure 1 shows the structure around the headlight 40 of the saddle-type vehicle 10. The saddle-type vehicle 10 is a vehicle comprising a body frame (not shown), a power unit (not shown) supported by the body frame, a front fork (not shown) that steers the front wheel (not shown), a swing arm (not shown) that supports the rear wheel (not shown), and a seat (not shown) for the rider. The front fork is steerably supported by the head pipe of the body frame.
[0010] The vehicle frame and power unit are covered by a vehicle cover. The vehicle cover is supported by the vehicle frame. The vehicle cover comprises a front cowl 36 that protects the front and front sides of the saddle-type vehicle 10, and a middle cowl 37 positioned behind the front cowl 36 and covering the sides of the saddle-type vehicle 10.
[0011] A windscreen 38 is positioned above the front cowl 36. An opening 36a is formed in the front part of the front cowl 36. In this embodiment, the opening 36a is composed of an air intake 36a1 that takes in airflow from the rear of the front cowl 36 and a lens opening 36a2 through which the outer lens 45 of the headlight (lamp body) 40 is exposed. The headlight 40 is fixed to the vehicle frame via a bracket (not shown).
[0012] Figure 2 is a front view of the headlight 40. Figure 3 is a front view of the headlight 40 with the outer lens 45, left extension 71, and left inner lens removed. Figure 4 is a cross-sectional view taken along line IV-IV of Figure 2. The headlight 40 extends rearward and upward in the left - right direction from the center portion in the left - right direction of the saddle - riding type vehicle 10, in other words, from the left - right center line C1 of the lamp body. The headlight 40 is substantially symmetric about the left - right center line C1 of the lamp body.
[0013] The headlight 40 has a base member 41 on which a first light source 51, a second light source 52, a third light source 53, a fourth light source 54 (see FIG. 3), etc. are arranged, and an outer lens 45 that covers the front surface of the base member 41.
[0014] The base member 41 forms the rear surface portion of the headlight 40. The base member 41 has a base main body portion 42 on which the light sources 51 - 54, a partition member 60 (see FIG. 3), and an extension 71 are arranged, and a fixing portion 43 of the base member 41.
[0015] The base main body portion 42 is composed of a base member central portion 42a extending in the left - right direction and base member end portions 42b that curve rearward and upward and spread from both left and right ends of the base member central portion 42a.
[0016] The fixing portion 43 is formed on the outer periphery of the base main body portion 42 in a front view of the headlight 40. In the present embodiment, the fixing portion 43 is formed at four locations on the upper part of the base member 41 and two locations on the lower part of the base member 41. The fixing portion 43 is fixed to the vehicle body frame via a stay (not shown).
[0017] A fitting edge portion 44 is formed along the outer peripheral edge of the front surface of the base main body portion 42. The outer peripheral portion of the outer lens 45 is fitted and mounted on the fitting edge portion 44. Thereby, the front surface of the base member 41 is covered by the outer lens 45. Therefore, the headlight 40 has an internal space surrounded by the base member 41 and the outer lens 45. The internal space houses the light sources 51 - 54, the partition member 60, the extension 71, etc. attached to the base member 41.
[0018] The outer lens 45 is formed from a transparent material that allows light to pass through. The outer lens 45 extends upward and rearward from the left-right center line C1 of the light body.
[0019] Figure 5 is a cross-sectional view along line VV in Figure 2. Figure 6 is a cross-sectional view along line VI-VI in Figure 2. The outer lens 45 is composed of a recess 46 in which the central part in the left-right direction is recessed backward, and an outer lens front portion 45a that extends outward in the left-right direction from both left and right ends of the recess 46.
[0020] The recess 46 is a roughly U-shaped recess. When viewed from above, the recess 46 is composed of a recess rear surface portion (gap rear surface portion) 46a corresponding to the bottom surface of the recess shape, and recess side portions (gap side portions) 46b extending forward from both the left and right ends of the recess rear surface portion 46a. The recess side portions 46b are connected to the ends of the outer lens front surface portion 45a on the C1 side of the left and right center line of the lamp body.
[0021] In this embodiment, as shown in Figure 1, the recess 46 is covered by the front cowl 36 when viewed from the front of the vehicle. A portion of the recess 46 is positioned to overlap with the air intake 36a1 when viewed from the front of the vehicle. In other words, a portion of the recess 46 is visible from the front through the air intake 36a1. As a result, the recess 46 and the front cowl 36 form an air guide 47. Therefore, when the saddle-type vehicle 10 is in motion, air enters from the air intake 36a1 and is guided along the air guide 47 to the rear of the saddle-type vehicle 10. This stabilizes the airflow around the headlight 40 and further improves the handling stability of the saddle-type vehicle 10.
[0022] As shown in Figure 3, the headlight 40 has a plurality of light sources 51-54 attached to a base member 41, and a partition member 60 that forms lamp chambers 64-66 in which the light sources 51-54 are housed. Each of the light sources 51-54 and the partition members 60 is provided in pairs, one on the left and one on the right. The light sources 51-54 and the partition members 60 are arranged symmetrically with respect to the left-right center line C1 of the light fixture. In the following section, regarding headlight 40, the configuration of the right side will be omitted from the explanation, and the configuration of the left side will be described.
[0023] In this embodiment, the light sources 51 to 54 are LEDs (Light Emitting Diodes). Light sources 51 to 54 are light sources that emit light as high beam, low beam, position light, or daytime running light (DRL), respectively. Light sources 51 to 53 are arranged in the order of first light source 51, second light source 52, and third light source 53, from the outside of the headlight 40 to the center of the headlight 40.
[0024] The first light source 51 and the second light source 52 are used as either a high beam or a low beam. The third light source 53 is used as a high beam when the first light source 51 is a high beam, and as a low beam when the first light source 51 is a low beam. In this embodiment, the first light source 51 and the third light source 53 are low beam light sources, and the second light source 52 is a high beam light source.
[0025] Furthermore, the base body 42 has a fourth light source 54, which is a light source for the DRL. Therefore, in the following, the first light source 51 and the third light source 53 will be referred to as the outer low beam light source 51 and the additional low beam light source 53, respectively. The second light source 52 will be referred to as the high beam light source 52. The fourth light source 54 will be referred to as the DRL light source 54. In this embodiment, the DRL light source 54 is positioned above the low beam light source 51 when viewed from the front.
[0026] As shown in Figure 5, in this embodiment, the outer low-beam light source 51 and the high-beam light source 52 are positioned in the front-rear direction on the front side of the base member end portion 42b and behind the recessed rear surface portion 46a.
[0027] Furthermore, the additional low-beam light source 53 is positioned on both the left and right sides of the recess 46 with respect to the left-right center C1 of the headlight 40, and in front of the central part 42a of the base member. More specifically, the additional low-beam light source 53 is positioned in front of the rear surface 46a of the recess 46 and behind the front surface 45a of the outer lens. By providing the additional low-beam light source 53 in front of the rear surface 46a of the recess and behind the front surface 45a of the outer lens in this way, the space of the headlight 40 can be used effectively, and the headlight 40 itself can be made more compact.
[0028] As shown in Figure 3, a partition member 60 is provided in front of the light sources 51 to 54. In this embodiment, the partition member 60 is composed of a first partition plate 61 and a second partition plate 62. The first partition plate 61 forms a first lamp chamber 64 that houses the outer low beam light source 51 and a second lamp chamber 65 that houses the high beam light source 52. The second partition plate 62 forms a third lamp chamber 66 that houses the additional low beam light source 53 and the DRL light source 54. Light is emitted from the lamp chambers 64 to 66 in accordance with the light emission of the light sources 51 to 54 that are housed there, respectively. Furthermore, the partition member 60 separates the light sources 51 to 54 by the lamp chambers 64 to 66. Therefore, interference between the light emission of the light sources 51 to 54 is less likely.
[0029] The third lamp compartment 66 is a recess that extends towards the rear of the headlight 40. The third lamp chamber 66 is composed of a straight section 67 extending along the boundary between the first partition plate 61 and the second partition plate 62, and a curved section 68 extending from the other end of the straight section 67 to the DRL light source 54.
[0030] Figure 7 is an enlarged view showing the area around the opening 66a of the third lamp chamber 66, and is a view from the front and below of the headlight 40. The third lamp chamber 66 has substantially rectangular openings at both ends in the longitudinal direction. Opening 66a is located in front of the additional low beam light source 53. Light from the additional low beam light source 53 enters the third lamp chamber 66 through opening 66a. Opening 66b is located in front of the DRL light source 54. Light from the DRL light source 54 enters the third lamp chamber 66 through opening 66b (see Figure 3).
[0031] As shown in Figure 3, a turn signal unit 56 is positioned to the left of the DRL light source 54. The turn signal unit 56 extends in the direction in which the straight section 67 of the third lamp chamber extends.
[0032] The turn signal section 56 consists of a turn signal base section on which LEDs are arranged, and a transparent turn signal cover section that covers the turn signal base section. The turn signal cover section is equipped with a bellows-shaped light reflecting section 58.
[0033] In the turn signal section 56 of this embodiment, four white LEDs and four amber LEDs are arranged (not shown), with four of the same color arranged in a line in the extending direction at predetermined intervals. Therefore, when the LEDs emit light, some of the light reflected by the light reflecting section 58 is emitted, causing the turn signal section 56 to appear to emit light.
[0034] The turn signal unit 56 is a position turn signal that functions as both a turn signal and a daytime running light (DRL). In other words, under normal conditions, the turn signal unit 56 functions as a DRL by emitting a white LED. When the driver activates the turn signal, the turn signal unit 56 turns off the white LED and then continuously switches the amber LED on and off. As a result, the turn signal unit 56, which was functioning as a DRL, also functions as a turn signal.
[0035] Figure 8 is a front view of the headlight 40 with inner lenses 61a, 61b, 70a, and 70b added compared to Figure 3. The first light source 51 is covered by a first inner lens 61a formed from a transparent material at its front. The second light source 52 is covered by a second inner lens 61b formed from a transparent material at its front. The light from the first light source 51 and the second light source 52 is emitted directly through the inner lenses 61a and 61b.
[0036] The third lamp chamber 66 houses a light guide member 69 made of transparent resin. The third lamp chamber 66 appears to be illuminated as a whole due to the emission of additional low-beam light sources 53 or DRL light sources 54. More specifically, when the additional low-beam light source 53 and the DRL light source 54 emit light, light enters the light guide member 69 through the apertures 66a and 66b. The light that enters the light guide member 69 is guided throughout the third lamp chamber 66 by diffuse reflection, and some of the diffusely reflected light is emitted outside the third lamp chamber 66. Therefore, the entire third lamp chamber 66 appears to be emitting light.
[0037] The third lamp chamber 66 and the turn signal section 56 are covered by a third inner lens 70a and a fourth inner lens 70b, which are made of transparent material. The third inner lens 70a covers the front of the additional low beam light source 53 in the third lamp chamber 66. The fourth inner lens 70b covers the turn signal section 56 and most of the straight section 67 of the third lamp chamber. In other words, the light from the additional low beam light source 53 and the DRL light source 54 is emitted through the light guide member 69 and the inner lenses 70a and 70b of the third lamp chamber 66.
[0038] An extension 71 is positioned on the base member 41. The extension 71 is positioned so as to overlap the partition member 60 and the turn signal section 56. In a front view of the headlight 40, the extension 71 has openings 71b corresponding to the positions of the first lamp chamber 64, the second lamp chamber 65, the straight section 67 of the third lamp chamber 66, and the turn signal section 56. This allows light emitted from lamp chambers 64-66 to be emitted outside the headlight 40.
[0039] The extension 71 has a light-shielding portion 71a that separates the third inner lens 70a and the fourth inner lens 70b. As a result, the light emitted from the third lamp chamber 66 is less likely to intersect with the light emitted from the third inner lens 70a and the light emitted from the fourth inner lens 70b, and in a front view of the headlight 40, each appears to be independent.
[0040] The third lamp chamber 66 appears to emit light due to diffuse reflection from the additional low-beam light source 53 and the DRL light source 54. In this embodiment, when the additional low-beam light source 53 is emitting light, the DRL light source 54 emits light at a reduced intensity. Therefore, in the third lamp chamber, the third inner lens 70a side emits light brightly, while the fourth inner lens 70b side emits light dimmer than the third inner lens 70a side, with the light shielding portion 71a as the boundary.
[0041] In other words, the third lamp chamber 66 functions as a low beam on the side with the third inner lens 70a. At the same time, the fourth inner lens 70b side of the third lamp chamber 66 functions as a position lamp due to the dimming of the DRL light source 54. Furthermore, since the third lamp chamber 66 is equipped with an additional low-beam light source 53 and a DRL light source 54, even if one of them stops emitting light, the other light source can be used to make the third lamp chamber 66 appear to be lit.
[0042] Thus, in this embodiment, the additional low-beam light source 53 and the DRL light source 54 are shared in the third lamp chamber 66. Therefore, the headlight 40 can be made more compact while achieving the desired light distribution.
[0043] As described above, the headlight 40 is a headlight in which an outer low beam light source 51, a high beam light source 52, and an additional low beam light source 53, which emit light as either a high beam or a low beam, are surrounded by a base member 41 and an outer lens 45. A recess 46 is formed in the left-right center of the headlight 40, spaced apart in the left-right direction. The outer low beam light source 51 and the additional low beam light source 53 emit light as either a high beam or a low beam, and the high beam light source 52 emits light as either a high beam or a low beam. When viewed from the front of the headlight 40, the outer low beam light source 51, the high beam light source 52, and the additional low beam light source 53 are arranged in that order from the left-right outer side of the headlight 40, with the additional low beam light source 53 provided between the recess 46 and the high beam light source 52. With this configuration, a recess 46 is provided in the center of the headlight 40 through which airflow can pass, thereby improving steering stability. Additionally, by providing an additional low-beam light source 53 between the high-beam light source 52 and the recess 46, which emits light in the same way as the outer low-beam light source 51, it is possible to expand the illumination range of the low beam and further improve visibility. This is achieved by positioning the additional low-beam light source 53, which performs the same function as the outer low-beam light source 51, while suppressing the enlargement of the headlight 40 by arranging the outer low-beam light source 51 and high-beam light source 52 vertically in order to emit light in the left-right-center direction.
[0044] The recess 46 is formed by an enclosed shape consisting of at least the rear recess portion 46a and the left and right side recess portions 46b of the rear recess portion 46a, and in a top view of the headlight 40, the additional low beam light source 53 is provided in front of the headlight 40 beyond the rear recess portion 46a and behind the headlight 40 beyond the front surface of the outer lens 45. With this configuration, by placing the additional low-beam light source 53 in front of the rear recess portion 46a and behind the front surface of the outer lens 45, the space of the headlight 40 can be effectively utilized, allowing the additional low-beam light source 53 to be positioned while still having a recess 46 in the center of the headlight 40. Even with the recess 46 and the additional low-beam light source 53, the headlight 40 itself can be made more compact.
[0045] The system further comprises a partition member 60 forming a first lamp chamber 64, a second lamp chamber 65, and a third lamp chamber 66, and a DRL light source 54 that emits light as a DRL. Light from an outer low beam light source 51 is emitted from the first lamp chamber 64, light from a high beam light source 52 is emitted from the second lamp chamber 65, and light from an additional low beam light source 53 and a DRL light source 54 is emitted from the third lamp chamber 66. With this configuration, by sharing the lamp chamber for the DRL light source 54 that emits light as a DRL and the lamp chamber for the additional low beam light source 53, it becomes unnecessary to provide a separate lamp chamber for the additional low beam light source 53, making the headlight 40 more compact while achieving the desired light distribution.
[0046] When the additional low beam light source 53 is emitting light, the DRL light source 54 emits light at a reduced intensity than a predetermined amount. The third lamp chamber 66 extends at least in either the vertical or horizontal direction of the headlight 40 and has openings 66a and 66b at both ends in the direction of extension. Light from the additional low beam light source 53 is emitted from the opening 66a at one end, and light from the DRL light source 54 is emitted from the opening 66b at the other end. With this configuration, since the additional low-beam light source 53 is located on one end of the third lamp chamber 66 and the DRL light source 54 is located on the other end, even if the light output of the DRL light source 54 decreases, the entire third lamp chamber 66 can be made to appear to be emitting light without the need for additional light sources.
[0047] [Other embodiments] The embodiments described above represent only one aspect of the present invention and can be modified and applied as needed without departing from the spirit of the invention.
[0048] The above-described embodiment explained an example of a headlight installed on a saddle-type vehicle. However, it is not limited to this, and headlights installed on four-wheeled vehicles, etc., may also be used.
[0049] Furthermore, in the embodiments described above, examples were given in which LEDs were used as light sources 51 to 54. However, the type of light source is not limited to this, and known light sources can be used. For example, the light source may be a point light source other than an LED, a bulb light source, or a surface light source that emits surface light by densely arranging multiple light-emitting elements.
[0050] In the embodiment described above, the third lamp chamber 66 appeared to emit light as a daytime running light (DRL) and low beam by reflecting light with the light guide member 69. Similarly, the turn signal section 56 appeared to emit light as a DRL and turn signal by reflecting light with the light reflecting section 58. However, it is also possible to use a direct-emitting type where the light from the light source is emitted directly without going through a light guide member or reflector. Furthermore, the low beam from the first light source and the high beam from the second light source were direct-emitting types, where the light from the light source was emitted directly. However, it is also possible to use a configuration in which the light is emitted via a light guide member or reflector.
[0051] [Configurations supported by the above embodiment] The above embodiment supports the following configuration:
[0052] (Configuration 1) A lamp body in which a first light source, a second light source, and a third light source that emit light as either a high beam or a low beam are surrounded by a base member and an outer lens, wherein a gap is formed in the left-right central part of the lamp body, the first light source and the third light source emit light as either a high beam or a low beam, the second light source emits light as either a high beam or a low beam, and in a front view of the lamp body, the first light source, the second light source, and the third light source are arranged in that order from the left-right outer edge of the lamp body, and the third light source is provided between the gap and the second light source. This configuration allows for improved handling stability by providing a gap in the center of the light unit through which airflow can pass. Furthermore, by placing a third light source between the second light source and the gap, which emits light in the same way as the first light source, it is possible to expand the illumination range and improve visibility while suppressing the enlargement of the light unit by arranging the first and second light sources vertically to emit light in the left-right-center direction, thereby improving visibility. Consequently, this configuration provides a light unit that improves handling stability, suppresses enlargement, and also improves visibility.
[0053] (Configuration 2) The lamp body according to Configuration 1, characterized in that the gap is formed by an enclosed shape consisting of at least the rear surface of the gap and the left and right side surfaces of the gap on both sides of the rear surface of the gap, and in a top view of the lamp body, the third light source is provided in front of the lamp body beyond the rear surface of the gap and behind the lamp body beyond the front surface of the outer lens. With this configuration, by placing the third light source in front of the rear surface of the gap and behind the front surface of the outer lens, the space of the light fixture can be effectively utilized, allowing the third light source to be positioned while leaving a gap in the center of the light fixture. Even with the gap and the third light source, the light fixture itself can be made more compact.
[0054] (Configuration 3) A lamp body according to Configuration 1 or 2, further comprising partition members forming a first lamp chamber, a second lamp chamber, and a third lamp chamber, and a fourth light source that emits light as a DRL, wherein light from the first light source is emitted from the first lamp chamber, light from the second light source is emitted from the second lamp chamber, and light from the third light source and the fourth light source is emitted from the third lamp chamber. With this configuration, by sharing the lamp chamber for the fourth light source that emits light as a DRL with the lamp chamber for the third light source, it becomes unnecessary to provide a separate lamp chamber for the third light source, making the lamp body more compact while achieving the desired light distribution.
[0055] (Configuration 4) The lamp body according to Configuration 3, characterized in that when the third light source is emitting light, the fourth light source emits light at a reduced light intensity than a predetermined amount, the third lamp chamber extends at least in either the vertical or horizontal direction of the lamp body, and has openings at both ends in the direction of extension, with light from the third light source emitting from the opening at one end and light from the fourth light source emitting from the opening at the other end. With this configuration, the third light source is located at one end of the third lighting chamber and the fourth light source is located at the other end. Therefore, even if the light intensity of the fourth light source decreases, the entire third lighting chamber can be made to appear to be emitting light without the need for additional light sources. [Explanation of Symbols]
[0056] 40 Headlights (lamp bodies) 41 Base member 45 Outer Lens 46 Recess (gap) 46a Rear surface of recess (rear surface of gap) 46b Recessed side portion (gap side portion) 50 light source 51. Outer low-beam light source (first light source) 52 High-beam light source (second light source) 53 Additional low-beam light source (third light source) 54 DRL light source (fourth light source) 60 Partition members 64 First Light Room 65 Second light room 66 Third light room 66a aperture 66b aperture
Claims
1. In a lamp body (40) in which a first light source (51), a second light source (52), and a third light source (53) that emit light as high beam or low beam are surrounded by a base member (41) and an outer lens (45), In the left-right central part of the lamp body (40), a gap (46) is formed that is spaced apart in the left-right direction of the lamp body. The first light source (51) and the third light source (53) emit light as either a high beam or a low beam. The second light source (52) emits light as either a high beam or a low beam, the other of the two. In a front view of the lamp body (40), the first light source (51), the second light source (52), and the third light source (53) are arranged in that order from the left and right outer sides of the lamp body (40). The third light source (53) is provided between the gap (46) and the second light source (52), A light fixture characterized by the following features.
2. The gap (46) is formed by an enclosed shape consisting of at least the rear gap portion (46a) and the left and right side gap portions (46b) of the rear gap portion (46a), In a top view of the lamp body (40), the third light source (53) is positioned in front of the lamp body (40) beyond the gap rear surface portion (46a) and behind the lamp body beyond the front surface of the outer lens (45). The lamp body according to feature 1.
3. The system further comprises a partition member (60) forming a first lamp chamber (64), a second lamp chamber (65), and a third lamp chamber (66), and a fourth light source (54) that emits light as a DRL, Light from the first light source (51) is emitted from the first lamp chamber (64). Light from the second light source (52) is emitted from the second lamp chamber (65). Light from the third light chamber (66) and the fourth light source (54) is emitted from the third light chamber (66). The lamp body according to feature 1.
4. The fourth light source (54) emits light at a reduced light intensity than a predetermined amount when the third light source (53) is emitting light. The third lamp chamber (66) extends at least in either the vertical or horizontal direction of the lamp body (40), and has openings (66a, 66b) at both ends in the direction of extension. Light from the third light source (53) is emitted from the opening (66a) at one end, and light from the fourth light source (54) is emitted from the opening (66b) at the other end. The lamp body according to feature 3.