Lamp unit

Abstract

A lamp unit (10) is provided with: a first unit having a light-emitting part; a light source; a second unit having a lens part (32) with a shape different from that of the light-emitting part; and a shield part (5) having an opening, the shield part (5) shielding from the outside a member provided on the back of the shield part (5). The first unit is disposed in a position where the light-emitting part can be visually recognized from the outside of the lamp unit (10) in a frontal view. The lens part (32) of the second unit is disposed on the back of the shield part (5) or in the opening. At least a part of the lens part (32) of the second unit is provided in a position not visible in the frontal view, and light emitted from the light source is projected forward through the opening provided in the shield part (5).

Description

[Technical Field]

[0001] The present disclosure relates to a lamp unit. [Background technology]

[0002] Known vehicle lighting devices include, for example, turn signal lamps and road marking lamps that notify people around the vehicle of the vehicle's right / left turn, etc. Patent Document 1 discloses a vehicle equipped with turn signal lamps and road marking lamps that draw a predetermined image on the road surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2019 / 044404 Summary of the Invention [Problem to be solved by the invention]

[0004] Meanwhile, most backup lamps and turn signal lamps have horizontally elongated light-emitting portions, while most road marking lamps have convex lenses. Therefore, the shape of the light-emitting portions of the backup lamps and turn signal lamps in a front view differs from the shape of the lenses of the road marking lamps in a front view. For example, if backup lamps and road marking lamps are arranged horizontally in a row, the design unity of the lamps may be lost, and the design of the lamp unit may be reduced. Therefore, when attempting to design a lamp unit without compromising the design of the lamp unit, the degree of freedom in designing the lamp unit may be restricted.

[0005] An object of the present disclosure is to provide a lamp unit with a high degree of freedom in design. [Means for solving the problem]

[0006] A lamp unit according to one aspect of the present disclosure includes: a first unit having a light-emitting portion; a second unit having a light source and a lens portion having a shape different from that of the light emitting portion; a shielding portion having an opening, the shielding portion shielding a member provided on a rear side of the shielding portion from the outside, the first unit is disposed at a position where the light emitting portion can be seen from outside the lamp unit in a front view, the lens portion of the second unit is disposed on the back side of the shielding portion or in the opening, At least a part of the lens portion of the second unit is located in a position that is not visible when viewed from the front, and light emitted from the light source is projected forward through the opening provided in the shielding portion.

[0007] According to the above configuration, the second unit has a lens portion having a different shape from the light-emitting portion of the first unit. Furthermore, at least a portion of the lens portion is located in a position that is not visible from the outside of the lamp unit in a front view due to the shielding portion. Therefore, the location of the second unit and the shape of the lens portion can be designed without taking the first unit into consideration. Therefore, the lamp unit according to the above configuration has a high degree of design freedom. [Effects of the Invention]

[0008] According to the present disclosure, a lamp unit with a high degree of freedom in design can be provided. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating the rear of a vehicle equipped with a lamp unit according to one aspect of this embodiment. [Figure 2] FIG. 2 is a cross-sectional view of the lamp unit according to the first embodiment. [Figure 3] FIG. 3 is a front view of the lamp unit according to the first embodiment. [Figure 4] FIG. 4 is a front view of the lamp unit according to the second embodiment. [Figure 5] FIG. 5 is a front view of a lamp unit according to the third embodiment. [Figure 6A] FIG. 6A is a diagram illustrating a lens according to a modified example. [Figure 6B] FIG. 6B is a diagram illustrating a lens according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present disclosure (hereinafter referred to as the present embodiment) will be described with reference to the drawings. For the sake of convenience, the dimensions of each component shown in the drawings may differ from the actual dimensions of each component.

[0011] Furthermore, in the description of this embodiment, for convenience of explanation, the "left-right direction," "up-down direction," and "front-rear direction" may be referred to as appropriate. These directions are relative directions set for the vehicle 100 shown in FIG. 1. Here, the "left-right direction" is a direction that includes the "left direction" and the "right direction." The "up-down direction" is a direction that includes the "upward direction" and the "downward direction." The "front-rear direction" is a direction that includes the "forward direction" and the "rearward direction." The front-rear direction is a direction that is perpendicular to the left-right direction and the up-down direction. Note that in each figure, the symbol U shown in the figure indicates the upward direction. The symbol D indicates the downward direction. The symbol F indicates the forward direction. The symbol B indicates the rearward direction. The symbol L indicates the leftward direction. The symbol R indicates the rightward direction.

[0012] (First embodiment) A vehicle 100 equipped with a lamp unit 10 according to this embodiment will be described below with reference to FIG. 1. FIG. 1 is a diagram illustrating the rear portion of a vehicle 100 equipped with a lamp unit 10 according to this embodiment. The vehicle 100 is, for example, a vehicle (automobile) that can run in a manual driving mode or an automatic driving mode. The vehicle 100 is equipped with the lamp unit 10. For ease of explanation, in this embodiment, it is assumed that the vehicle 100 is located on a horizontal, flat road.

[0013] 2, the lamp unit 10 includes a lamp body 101 having an opening in front of the lamp, and a light-transmitting outer cover 102 that covers the opening of the lamp body 101. As illustrated in FIGS. 2 and 3, the lamp unit 10 includes backup lamps 1 (an example of a first unit), turn signal lamps 2 (an example of a first unit), road marking lamps 3 (an example of a second unit), side light 4 (an example of a second unit), and a shielding portion 5. The backup lamps 1, turn signal lamps 2, road marking lamps 3, side light 4, and shielding portion 5 are housed in a lamp chamber 103 formed by the lamp body 101 and the outer cover 102.

[0014] The backup lamp 1 has a primary light source 11 and a first light-emitting portion 12. The backup lamp 1 emits light (e.g., white light) toward the rear of the vehicle 100, for example, when the vehicle 100 is backing up. The backup lamp 1 is disposed behind the shielding portion 5 (forward of the shielding portion 5 in FIG. 2). As illustrated in FIG. 3, the backup lamp 1 is disposed in a horizontal row with the road marking lamps 3 in a front view. In this specification, the term "horizontal row" refers to a state in which two or more different lamps are disposed in a horizontal row (left and right in FIG. 3), and does not necessarily have to be disposed in a linear row. The backup lamp 1 is disposed so that the first light-emitting portion 12 can be seen from outside the lamp unit 10 in a front view.

[0015] Primary light source 11 includes, for example, an LED (Light Emitting Diode) element or an LD (Laser Diode) element. Primary light source 11 emits light toward first light-emitting section 12.

[0016] The first light-emitting element 12 is a lens formed of a translucent material, such as a transparent resin such as acrylic or glass. The first light-emitting element 12 is disposed in front of the lamp unit 10 (rear of the vehicle 100) relative to the primary light source 11. The first light-emitting element 12 has a flat shape extending in the longitudinal direction of the lamp unit 10 (the left-right direction in FIG. 3 ). The first light-emitting element 12 transmits light emitted from the primary light source 11 toward the front of the lamp unit 10 (rear of the vehicle 100). In the following description, the front of the lamp unit 10 corresponds to the rear of the vehicle 100, and the rear of the lamp unit 10 corresponds to the front of the vehicle 100. The front of the lamp unit 10 refers to the direction in which the backup lamps 1, turn signal lamps 2, road marking lamps 3, and sidelights 4 project light. The light emitted from the primary light source 11 is irradiated toward the rear area of ​​the vehicle 100, which is an area outside the lamp unit 10. The first light emitting section 12 may be configured by a reflecting mirror or the like instead of a lens.

[0017] As illustrated in FIGS. 2 and 3 , the turn signal lamps 2 are arranged in front of the backup lamps 1, road marking lamps 3, and sidelights 4 (rear of the vehicle 100). The turn signal lamps 2 have a second light source 21 and a second light-emitting portion 22. The turn signal lamps 2, for example, irradiate light around the vehicle 100 to notify a target person of a change in the traveling direction of the vehicle 100. The turn signal lamps 2 are arranged so as to be aligned horizontally with the road marking lamps 3 in a front view. The turn signal lamps 2 are arranged so that the second light-emitting portion 22 can be seen from outside the lamp unit 10 in a front view.

[0018] The secondary light source 21 can be configured, for example, of an LED element or an LD element, similar to the primary light source 11. The secondary light source 21 emits light toward the second light-emitting unit 22. The secondary light source 21 is disposed in a position that is not hidden by the shielding unit 5 and is higher than the backup lamps 1, the road marking lamps 3, and the side lamps 4.

[0019] The second light-emitting portion 22 can be configured, for example, by a lens, a reflector, or the like, similar to the first light-emitting portion 12. The second light-emitting portion 22 is disposed at a position facing the secondary light source 21. The second light-emitting portion 22 has a flat shape extending in the longitudinal direction of the lamp unit 10 (the left-right direction in FIG. 3). The second light-emitting portion 22 transmits the light emitted from the secondary light source 21 toward the front of the lamp unit 10 (the rear of the vehicle 100). The light emitted from the secondary light source 21 is irradiated onto the rear area of ​​the vehicle 100, which is an external area of ​​the lamp unit 10.

[0020] The road surface drawing lamp 3 draws an image (road surface drawing pattern) indicating predetermined information on the road surface by irradiating light onto the road surface near the vehicle 100. The predetermined information is, for example, information regarding the planned direction of travel of the vehicle 100, information prompting pedestrians, other vehicles, etc. to stop or slow down, etc. The road surface drawing lamp 3 has a third light source 31 and a lens unit 32.

[0021] The third light source 31 can be configured, for example, by an LED element or an LD element, similar to the first light source 11. The third light source 31 is disposed, for example, behind the shielding portion 5 (in front of the vehicle 100) and above the side light 4. The third light source 31 emits light toward the lens portion 32.

[0022] The lens section 32 includes three lenses 32a to 32c. The lenses 32a to 32c are arranged in the longitudinal direction of the lamp unit 10 (the left-right direction in FIG. 3). The lenses 32a to 32c are made of a light-transmitting material, such as a transparent resin such as acrylic or glass. The lenses 32a to 32c are, for example, aspherical lenses.

[0023] 3, the lens 32a is substantially circular in a front view of the lamp unit 10 (viewed from the rear of the vehicle 100). The lenses 32b to 32c have the same configuration as the lens 32a. The lenses 32a to 32c are smaller in size in this order: lens 32a, lens 32b, and lens 32c.

[0024] 2, the lens unit 32 projects the light emitted from the third light source 31 forward of the lamp unit 10. The light emitted from the third light source 31 is irradiated onto an area inclined downward by an angle θ1 or more and an angle θ2 or less with respect to an axis X1 extending horizontally from the lamp unit 10. When the light emitted from the third light source 31 is irradiated onto the road surface near the vehicle 100, an image (road surface drawing pattern) showing predetermined information is drawn on the road surface.

[0025] The light emitted from the third light source 31 is irradiated onto an area tilted downward by, for example, 5 degrees or more and 58 degrees or less with respect to the axis X1. However, the angles θ1 and θ2 are not limited to these values. The angle θ1 may be 5 degrees or more, and is preferably 10 degrees. The angle θ2 may be 58 degrees or less. It is particularly preferable that the angle θ1 is 11 degrees and the angle θ2 is 58 degrees. The lens unit 32 is disposed between the third light source 31 and the shielding unit 5, on the back side of the shielding unit 5 (in front of the shielding unit 5 in FIG. 2).

[0026] 2 and 3, the side marker lamp 4 has a fourth light source 41 and a fourth light emitting portion 42. The side marker lamp 4 emits light toward the rear of the vehicle 100 to indicate the presence of the vehicle 100. The side marker lamp 4 is disposed in a position where the fourth light emitting portion 42 can be seen from outside the lamp unit 10 when viewed from the front.

[0027] The fourth light source 41 may be configured, for example, with an LED element or an LD element, similar to the first light source 11. The fourth light source 41 is disposed, for example, inside the side light 4. The fourth light source 41 emits light toward the fourth light-emitting portion 42.

[0028] The fourth light-emitting section 42 may be configured, for example, by a lens, a reflecting mirror, or the like, similar to the first light-emitting section 12. The fourth light-emitting section 42 is disposed in a position facing the fourth light source 41. The fourth light-emitting section 42 has a flat shape extending in the longitudinal direction of the lamp unit 10 (the left-right direction in FIG. 3 ) when viewed from the front. The fourth light-emitting section 42 is disposed between the fourth light source 41 and the shielding section 5. The fourth light-emitting section 42 transmits light emitted from the fourth light source 41 toward the front of the lamp unit 10 (the rear of the vehicle 100).

[0029] The shielding portion 5 is, for example, a frame-shaped panel member (extension) arranged on the front side of the lamp unit 10, and shields members provided on the back side of the shielding portion 5 (forward of the shielding portion 5 in FIG. 2) from the outside (the rear of the vehicle 100). The shielding portion 5 can be made of, for example, a thermoplastic resin such as polycarbonate, polypropylene, or polybutylene terephthalate resin. In addition, a metal film such as aluminum may be vapor-deposited on the surface of the shielding portion 5 (the surface facing the rear of the vehicle 100).

[0030] The shielding portion 5 includes a main body portion 51 and a plate-like portion 52. The main body portion 51 has a plate-like portion extending in the left-right and up-down directions. As illustrated in FIG. 2, the main body portion 51 is substantially U-shaped in cross section. A first opening 511 and a second opening 512 are formed in the main body portion 51. The first opening 511 and the second opening 512 have a flat shape extending in the longitudinal direction of the lamp unit 10 (the left-right direction in FIG. 3). In this embodiment, the longitudinal direction of the first opening 511 coincides with the arrangement direction of the lenses 32a to 32c of the road marking lamp 3. Furthermore, the longitudinal direction of the second opening 512 coincides with the longitudinal direction of the fourth light-emitting portion 42 of the side marker lamp 4.

[0031] The first opening 511 is provided above the second opening 512. The first opening 511 is configured to project light emitted from the third light source 31 of the road marking lamp 3 and transmitted through the lens portion 32 forward of the lamp unit 10. The second opening 512 is configured to project light emitted from the fourth light source 41 of the side marker lamp 4 forward of the lamp unit 10.

[0032] The plate-shaped portion 52 is a plate-shaped member and is substantially I-shaped in cross section. In cross section, the plate-shaped portion 52 is inclined with respect to the horizontal direction of the lamp unit 10. Specifically, the plate-shaped portion 52 is inclined at an angle θ3 (an example of a first angle) with respect to an axis X1 extending horizontally from the lamp unit 10. In other words, the angle θ3 is the inclination angle of the plate-shaped portion 52 with respect to the axis X1 (horizontal direction). Here, if the angle formed by the optical axis X2 of the light emitted from the third light source 31 of the road marking lamp 3 and the axis X1 extending horizontally is angle θ4 (an example of a second angle), the angle θ3 is smaller than the angle θ4.

[0033] 3, the plate-like portion 52 hides a part of the lens portion 32 so that a part (upper part) of the lenses 32a to 32c cannot be seen from the outside of the lamp unit 10 in a front view. In other words, a part of the lens portion 32 is provided in a position that cannot be seen from the outside of the lamp unit 10 in a front view.

[0034] While most backup lamps and turn signal lamps have horizontally elongated light-emitting portions, most road marking lamps have convex lenses. Therefore, a lamp unit that includes both backup lamps and turn signal lamps and road marking lamps may have a mixture of horizontally elongated lenses from the backup lamps and turn signal lamps and round lenses from the road marking lamps. The mixture of lenses of different shapes in this way may impair the sense of design unity and reduce the aesthetic appeal of the lamp unit. This reduction in aesthetic appeal is particularly pronounced in lamp units in which the light-emitting portions of the backup lamps and turn signal lamps and the lenses of the road marking lamps are arranged horizontally. On the other hand, designing a lamp unit without compromising its aesthetic appeal may limit the design flexibility of the lamp unit.

[0035] According to the lamp unit 10 having the above configuration, the road marking lamp 3 has a lens portion 32 that has a shape different from the first light-emitting portion 12 of the backup lamp 1 and the second light-emitting portion 22 of the turn signal lamp 2. Furthermore, at least a portion of the lens portion 32 (for example, the upper portions of the lenses 32a to 32c) is provided in a position that is hidden from view by the shielding portion 5 when viewed from the front. Therefore, the location of the road marking lamp 3 and the shape of the lens portion 32 can be designed without taking into consideration the first light-emitting portion 12 of the backup lamp 1 and the second light-emitting portion 22 of the turn signal lamp 2. Therefore, the lamp unit 10 has a high degree of freedom in design.

[0036] Furthermore, although the light-emitting portions of lamps mounted on vehicles generally have a flat shape extending in the longitudinal direction, with the lamp unit 10 having the above configuration, even if the first light-emitting portion 12 of the backup lamp 1 and the second light-emitting portion 22 of the turn signal lamp 2 are designed to have a flat shape extending in the longitudinal direction, it is possible to use a round lens or the like as the lens portion 32 of the road marking lamp 3 without considering the shapes of the first light-emitting portion 12 and the second light-emitting portion 22. Therefore, the lamp unit 10 has a high degree of freedom in design.

[0037] Furthermore, in the lamp unit 10 having the above configuration, the arrangement direction of the multiple lenses 32a to 32c included in the lens portion 32 coincides with the longitudinal direction of the first opening 511 of the shielding portion 5. Therefore, even if the lens portion 32 is arranged on the back side of the shielding portion 5, the light emitted from the third light source 31 of the road marking lamp 3 is not blocked by the shielding portion 5.

[0038] Furthermore, with the lamp unit 10 having the above configuration, the road marking lamp 3 irradiates light onto an area that is inclined downward by 5 degrees or more with respect to an axis X1 that extends horizontally from the lamp unit 10. In this case, even if the lens unit 32 is disposed on the back side of the shielding unit 5, the light emitted from the road marking lamp 3 is not shielded by the shielding unit 5, which is preferable.

[0039] Furthermore, with the lamp unit 10 having the above configuration, at least a portion of the lens portion 32 (for example, the upper portion of the lenses 32a to 32c) is not visible from outside the lamp unit 10 due to the plate-shaped portion 52 of the shielding portion 5, while the light emitted from the third light source 31 of the road marking lamp 3 is not blocked by the plate-shaped portion 52 of the shielding portion 5. Therefore, with the lamp unit 10, road marking can be performed without the lens portion 32 being visible.

[0040] Second Embodiment Next, the lamp unit 20 will be described with reference to Fig. 4. In the description of the lamp unit 20, the same components as those in the lamp unit 10 according to the first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted. The lamp unit 20 differs from the lamp unit 10 in that it has a third opening 513 that has a shape different from the first opening 511.

[0041] 4, the third opening 513 has a trapezoidal shape in a front view. In this embodiment, a portion (lower portion) of the lenses 32a to 32c can be seen from outside the lamp unit 10 in a front view through the third opening 513. On the other hand, a portion (upper portion) of the lenses 32a to 32c cannot be seen from outside the lamp unit 10 in a front view.

[0042] The lamp unit 20 according to the second embodiment can also achieve the same effects as the lamp unit 10 according to the first embodiment.

[0043] (Third embodiment) Next, the lamp unit 30 will be described with reference to Fig. 5. In the description of the lamp unit 30, the same components as those in the lamp unit 10 according to the first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted. The lamp unit 30 differs from the lamp unit 10 in that it has a fourth opening 514 that is a different size from the first opening 511. The lamp unit 30 also differs from the lamp unit 10 in that the arrangement of the lenses 32a to 32c included in the lens portion 32 is different from the arrangement of the lenses 32a to 32c in the first embodiment.

[0044] 5, in this embodiment, the lower ends of the lenses 32a to 32c are located above the fourth opening 514. Therefore, the lenses 32a to 32c are provided at positions that cannot be seen from the outside of the lamp unit 10 when viewed from the front.

[0045] The lamp unit 30 according to the third embodiment can also achieve the same effects as the lamp unit 10 according to the first embodiment.

[0046] (Modified lens) Next, with reference to FIGS. 6A and 6B, a modified example of the lens included in the lens unit 32 will be described. In this modified example, lens 132a, which is a modified example of lens 32a among the lenses included in the lens unit 32, will be described. Of the lenses included in the lens unit 32, the lenses other than lens 132a have the same configuration as lens 132a, but are smaller than lens 132a. Like lens 32a according to the first embodiment, lens 132a is formed from a transparent resin such as acrylic or a light-transmitting material such as glass. Lens 132a differs from lens 32a in that the upper end, lower end, left end, and right end of lens 132a are removed.

[0047] The lens 132a has a first surface 1321 and a second surface 1322 that is the surface opposite to the first surface 1321. As illustrated in Fig. 6A, the lens 132a has a substantially quadrangular shape when viewed from the front. That is, the lens 132a has a rectangular shape when viewed from the front. Therefore, when the lamp unit 30 is mounted on the vehicle 100, the lens 132a has a rectangular shape when viewed from the front.

[0048] 6B, first surface 1321 and second surface 1322 are convex surfaces. Both first surface 1321 and second surface 1322 are generally arc-shaped in side view, but the first curvature of first surface 1321 is smaller than the second curvature of second surface 1322. Therefore, first surface 1321 is more likely to appear rectangular in front view than second surface 1322.

[0049] This modification also has the same effects as the lamp unit 10 according to the first embodiment.

[0050] In this modification, the first curvature of the first surface 1321 of the lens 132a is smaller than the second curvature of the second surface 1322 of the lens 132a, so that the shape of the lens portion 32 is rectangular in a front view. Therefore, this modification can improve the design of the lamp unit 10.

[0051] Although the embodiments of the present disclosure have been described above, it goes without saying that the technical scope of the present disclosure should not be interpreted as being limited by the description of the present embodiments. The present embodiments are merely examples, and it will be understood by those skilled in the art that various modifications of the embodiments are possible within the scope of the disclosure described in the claims. The technical scope of the present disclosure should be determined based on the scope of the disclosure described in the claims and its equivalents.

[0052] In the above embodiment, the lamp unit 10 is mounted on the rear of the vehicle 100, so the front of the lamp unit 10 coincides with the rear of the vehicle 100 and the rear of the lamp unit 10 coincides with the front of the vehicle 100, but the present disclosure is not limited to this. The lamp unit 10 may also be mounted on the front of the vehicle 100, in which case the front of the lamp unit 10 coincides with the front of the vehicle 100 and the rear of the lamp unit 10 coincides with the rear of the vehicle 100.

[0053] In the above embodiment, the lens section 32 includes three lenses, but may include two lenses, four or more lenses, or may be a single lens.

[0054] In the above embodiment, the lenses included in the lens unit 32 have different sizes, but the lenses included in the lens unit 32 may have the same size.

[0055] In the above embodiment, the lens portion 32 is disposed on the back side of the shielding portion 5, but it may also be disposed inside the first opening 511 of the shielding portion 5. When the lens portion 32 is disposed inside the first opening 511 of the shielding portion 5, the shielding portion 5 is disposed at an angle so that at least a portion of the lens portion 32 is not visible from outside the lamp unit 10 due to the plate-like portion 52 of the shielding portion 5, for example.

[0056] In the above embodiment, the plate-shaped portion 52 hides a part of the lens portion 32 so that some (upper portions) of the lenses of the lens portion 32 are not visible from outside the lamp unit 10 in a front view, but it may also hide, for example, a lower portion of a lens included in the lens portion 32. The plate-shaped portion 52 may also hide the entirety of some of the multiple lenses included in the lens portion 32. In other words, the multiple lenses included in the lens portion 32 may be arranged so that the lower portions of the multiple lenses or the entirety of some of the multiple lenses are not visible from outside the lamp unit 10 in a front view.

[0057] This application incorporates by reference, as appropriate, the contents disclosed in a Japanese patent application (Patent Application No. 2021-109185) filed on June 30, 2021.

Claims

1. a first unit having a light-emitting portion; a second unit having a light source and a lens portion having a shape different from that of the light emitting portion; a shielding portion having an opening, the shielding portion shielding a member provided on a rear side of the shielding portion from the outside, the first unit is disposed at a position where the light emitting portion can be seen from outside the lamp unit in a front view, the lens portion of the second unit is disposed on the back side of the shielding portion or in the opening, At least a part of the lens portion of the second unit is provided at a position that is not visible in a front view, and light emitted from the light source is projected forward through the opening provided in the shielding portion, the shielding portion has at least one plate-shaped portion having a predetermined length in the longitudinal direction of the lamp unit, The plate-shaped portion is disposed at an incline in the horizontal direction, A lamp unit, wherein a first angle, which is an inclination angle of the plate-shaped portion with respect to the horizontal direction, is smaller than a second angle, which is an angle formed between an optical axis of light emitted from the light source and the horizontal direction.

2. the light-emitting portion has a flat shape extending in the longitudinal direction of the lamp unit, 2. The lamp unit according to claim 1, wherein said opening also has a flat shape extending in said longitudinal direction.

3. the lens portion includes a plurality of lenses; 3. The lamp unit according to claim 1, wherein the arrangement direction of the plurality of lenses coincides with the longitudinal direction of the opening.

4. 3. The lamp unit according to claim 1, wherein the second unit irradiates light onto an area inclined downward at an angle of 5 degrees or more with respect to an axis extending horizontally from the lamp unit.

5. 3. The lamp unit according to claim 1, wherein the lens portion has a rectangular shape when viewed from the front.

6. The lens portion has a first surface and a second surface opposite to the first surface, the first surface is disposed at a position closer to the shielding portion than the second surface, 3. The lamp unit according to claim 1, wherein the first curvature of the first surface is smaller than the second curvature of the second surface.

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