Vehicle lighting fixtures

Abstract

To provide a light source unit and a vehicle lamp in which a plurality of light sources corresponding to different lamp functions is mounted on one substrate, and which can prevent a situation that irradiation light from a first light source leaks to a light guide body facing a second light source and an unintended region of a lighting fixture emits light.SOLUTION: A light source unit 10 comprises a first light source 11, a second light source 12, a substrate 13 on which the first light source 11 and the second light source 12 are mounted, a body part 14 that houses the substrate 13, and a light shielding plate 15 attached to the body part 14 so as to face either the first light source 11 or the second light source 12. The light shielding plate 15 has an irradiation light passage hole 151 through which irradiation light from one of the light sources passes, and blocks irradiation light from at least the other light source. A vehicle lamp comprises the light source unit 10, a first light guide body 40 facing the first light source 11 of the light source unit 10, and a second light guide body 50 facing the second light source 12 of the light source unit 10.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention provides Vehicle lighting fixtures Regarding. [Background technology]

[0002] In vehicle lighting fixtures (hereinafter sometimes simply referred to as "lighting fixtures") such as combination lamps (rear combination lamps, front combination lamps, etc.), multiple light sources corresponding to different lamp functions may be arranged within the housing of the lighting fixture. For example, in the case of a rear combination lamp, a light source that functions as a stop lamp and another light source that functions as a tail lamp are arranged within the housing.

[0003] When arranging such multiple light sources in a housing, it is conceivable to mount each in a separate socket (LED socket). In other words, multiple sockets equipped with each light source are arranged side by side in the housing. However, in this case, it is necessary to provide space for the multiple sockets within the housing of the lamp. As a result, lamps with such a structure have problems in terms of space saving. Furthermore, wiring for supplying drive power to each light source must be provided according to the number of light sources (sockets). This may result in a complicated wiring structure within the lamp.

[0004] Incidentally, a light source unit in which different types of light sources are mounted on a single board is disclosed in Patent Document 1 below. More specifically, the light source unit of Patent Document 1 includes six light-emitting element groups densely arranged in two rows and three columns, and one light-emitting element mounted on the same board as the light-emitting element groups. The lighting fixture disclosed in Patent Document 1 also includes a first light guide facing the six light-emitting element groups of the light source unit, and a second light guide facing the one light-emitting element. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2020-47478 Summary of the Invention [Problem to be solved by the invention]

[0006] According to the light source unit and lighting fixture disclosed in Patent Document 1, different types of light sources are mounted together on one board. That is, multiple light sources corresponding to different lamp functions are provided in one socket. Therefore, the light source unit (lighting fixture) disclosed in Patent Document 1 can solve the above-mentioned problems that can arise in the light source unit (lighting fixture) that provides multiple sockets for each light source.

[0007] However, when different types of light sources mounted on a single board are close to each other, there is a possibility that light emitted from one light source (first light source) may leak toward the light guide facing the other light source (second light source). In this case, the light emitted from the first light source may be guided to the light guide facing the second light source, and the second light-emitting region (e.g., the second inner lens provided to emit light from the second light source) may emit light, rather than the first light-emitting region of the lamp (e.g., the first inner lens provided to emit light from the first light source). Patent Document 1 neither discloses nor suggests such a problem nor a means for solving the problem.

[0008] In view of the above-mentioned problems, the object is to provide a light source unit and a vehicle lamp in which multiple light sources corresponding to different lamp functions are mounted on a single substrate, and which can suppress leakage of light emitted from a first light source into a light guide facing a second light source, thereby preventing light from being emitted from an unintended area of ​​the lamp. [Means for solving the problem]

[0009] In order to solve the above-mentioned problems, the present invention Vehicle lighting fixtures teeth, A first light source; A second light source; a substrate on which the first light source and the second light source are mounted; a body portion that houses the substrate; before Second light sourcea light blocking plate attached to the body portion so as to face the a first light guide having a light entrance surface facing the first light source and a light guide region extending from the light entrance surface facing the first light source; a second light guide having a light entrance surface facing the second light source and a light guide region extending from the light entrance surface facing the second light source, the second light guide being disposed so that the light entrance surface facing the second light source faces the second light source via the light blocking plate; Equipped with the first light source is disposed near the second light source, and is arranged at a position where light emitted from the first light source is guided through the first light guide and a part of the light enters a light entrance surface of the second light guide when the light blocking plate is not provided; The light blocking plate is No. 2 An irradiation light passage hole for passing irradiation light from a light source, and the second light guide is disposed with a gap between it and the light incident surface of the second light guide; the irradiation light passing hole is sized to allow a light component of the light irradiated from the second light source that is irradiated toward the light incident surface of the second light guide to pass through, and to prevent a light component of the light irradiated from the second light source that is irradiated laterally toward the first light guide from entering the light incident surface of the first light guide, The light blocking plate is attached to the body portion so as to block light emitted from the first light source from entering the light entrance surface of the second light guide and to block light emitted from the second light source from entering the light entrance surface of the first light guide. It is characterized by:

[0010] According to this aspect of the present invention, the first light source and the second light source are mounted on the same board, and a light blocking plate is attached to a body that houses the board, the light blocking plate having an irradiated light passing hole that passes light irradiated from either the first light source or the second light source and blocking light irradiated from the other light source. This makes it possible to effectively prevent the irradiated light from one light source from being guided to a light guide facing the other light source and emitting from an unintended area of ​​the vehicle lamp.

[0011] Furthermore, the present invention Vehicle lighting fixtures In It is preferable that the light-shielding plate prevents the illumination light from the second light source from entering the light-entering surface of the first light guide facing the first light source, and also prevents the illumination light from the first light source from entering the light-entering surface of the second light guide facing the second light source.

[0012] According to this aspect of the present invention, the light blocking plate prevents the light emitted from the first light source from entering the light entrance surface of the light guide facing the second light source. This more effectively prevents the light emitted from the first light source from being guided to the light guide facing the second light source and emitting from an unintended area of ​​the vehicle lamp. Similarly, the light blocking plate prevents the light emitted from the second light source from entering the light entrance surface of the light guide facing the first light source.

[0013] Furthermore, the present invention Vehicle lighting fixtures In It is preferable that a light-shielding rib be provided on the rear surface of the light-shielding plate, protruding rearward from a predetermined position on the outer periphery of the irradiation light passing hole.

[0014] According to this aspect of the present invention, the light-shielding rib protruding from the back surface of the light-shielding plate prevents the light emitted from the first light source from entering the light-receiving surface of the light guide facing the second light source. This more effectively prevents the light emitted from the first light source from being guided to the light guide facing the second light source and emitting from an unintended area of ​​the vehicle lamp. Similarly, the light-shielding rib prevents the light emitted from the second light source from entering the light-receiving surface of the light guide facing the first light source.

[0015] Furthermore, the present invention Vehicle lighting fixtures In It is preferable that the light blocking plate faces either the first light source or the second light source, whichever generates less heat when emitting light.

[0016] According to this aspect of the present invention, the light shading plate faces either the first light source or the second light source, whichever generates less heat when emitting light, thereby preventing problems such as deformation or damage to the light shading plate due to heat from the light source facing the light shading plate.

[0017] Further, the vehicle lamp according to the present invention comprises: the light source unit; a first light guide facing the first light source of the light source unit; a second light guide facing the second light source of the light source unit; The present invention is characterized by comprising:

[0018] According to this aspect of the present invention, the light emitted from one of the first light source or the second light source is guided to the light guide (the first light guide or the second light guide) facing the other light source, thereby effectively preventing the light from being emitted from an unintended area of ​​the vehicle lamp. [Effects of the Invention]

[0019] According to the present invention, a light source unit and a vehicle lamp can be provided in which multiple light sources corresponding to different lamp functions are mounted on a single substrate, and leakage of light emitted from a first light source to a second light guide facing a second light source can be suppressed, thereby preventing light from being emitted from unintended areas of the vehicle lamp. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a horizontal cross-sectional view of a vehicle lamp according to an embodiment of the present invention; [Figure 2] FIG. 2 is a perspective view of a light source unit according to the embodiment. [Figure 3] FIG. 2 is an exploded perspective view of the light source unit according to the embodiment. [Figure 4] FIG. 3 is an enlarged front view of a first light source and a second light source provided in the light source unit. [Figure 5] FIG. 4 is a rear view of the light blocking plate provided in the light source unit according to the embodiment. [Figure 6] FIG. 3 is a perspective view showing a state in which a first light guide and a second light guide face the light source unit according to the embodiment. [Figure 7] FIG. 10 is a vertical cross-sectional view of the light source unit for explaining the function of the light blocking plate. DETAILED DESCRIPTION OF THE INVENTION

[0021] A vehicle lamp and a light source unit according to an embodiment of the present invention will be described in detail below with reference to the drawings. First, a vehicle lamp 1 and a light source unit 10 according to this embodiment will be described with reference to Figs. 1 to 6.

[0022] Here, Fig. 1 is a horizontal cross-sectional view of the vehicle lamp 1. Fig. 2 is a perspective view of the light source unit 10. Fig. 3 is an exploded perspective view of the light source unit 10. Fig. 4 is an enlarged front view of the first light source and the second light source provided in the light source unit 10. Fig. 5 is a rear view of the light shielding plate provided in the light source unit 10. Fig. 6 is a perspective view showing the state in which the first light guide and the second light guide face the light source unit 10.

[0023] First, a vehicle lamp 1 will be described. The vehicle lamp 1 of this embodiment is a rear combination lamp (tail and stop lamp). More specifically, as shown in FIG. 1 , the vehicle lamp 1 includes a light source unit 10, a housing 20, an outer lens 30, a first light guide 40, a second light guide 50, a first inner lens 60, and a second inner lens 70. The first inner lens 60 and the second inner lens 70 are integrally formed from a resin member, and the light-transmitting portion is formed from a light-transmitting resin, while the remaining portion is formed from a light-opaque resin. Although not shown, an extension for hiding the components may be disposed between the first inner lens 60, the second inner lens 70, and the outer lens 30. Since the vehicle lamp 1 is a rear combination lamp, the front side of the vehicle lamp 1 (light source unit 10) corresponds to the rear side of the vehicle. The back side of the vehicle lamp 1 (light source unit 10) corresponds to the front side of the vehicle.

[0024] However, the type of vehicle lamp 1 is not limited to a rear combination lamp corresponding to a tail and stop lamp. Examples of other vehicle lamps include other rear combination lamps (for example, tail lamp / turn lamp, stop lamp / turn lamp, position lamp / turn lamp, position lamp / autonomous driving lamp, tail lamp / autonomous driving lamp, etc.) and front combination lamps (for example, daytime running light / turn lamp, etc.).

[0025] In the vehicle lamp 1, the light source unit 10 is attached to a housing 20. The space surrounded by the housing 20 and the outer lens 30 corresponds to a lamp chamber 80. The first light guide 40 is a rod-shaped optical member (light guide rod) extending from the light source unit 10 toward a position near the first inner lens 60. The second light guide 50 is a rod-shaped optical member (light guide rod) extending from the light source unit 10 toward a position near the second inner lens 70.

[0026] More specifically, the light entrance surface 41 of the first light guide 40 faces a first light source (for example, a light source for a stop lamp) of the light source unit 10, which will be described later, while the light exit surface 42 faces the first inner lens 60. As a result, light from the first light source is guided to the first light guide 40, enters the first inner lens 60 from the light exit surface 42, and is emitted from the first inner lens 60.

[0027] Furthermore, the light entrance surface 51 of the second light guide 50 faces a second light source (for example, a light source for a tail lamp) of the light source unit 10, which will be described later, while the light exit surface 52 faces the second inner lens 70. As a result, light from the second light source is guided to the second light guide 50, enters the second inner lens 70 from the light exit surface 52, and is emitted from the second inner lens 70.

[0028] 2 and 3, the light source unit 10 of this embodiment includes a first light source 11, a second light source 12, a substrate 13, a body portion (socket body) 14, a light shielding plate 15, etc. The light source unit 10 also preferably includes a heat sink 16 that is fitted into the body portion 14 from the rear side and is in thermal contact with the substrate 13.

[0029] The body portion 14 of this embodiment extends to the front side of the light source unit 10 and includes a peripheral wall 141 having a substantially circular outline when viewed from the front. The substrate 13 is housed inside the body portion 14 surrounded by the peripheral wall 141. The substrate 13 also mounts both the first light source 11 and the second light source 12.

[0030] The first light source 11 and the second light source 12 are light sources that perform different lamp functions. The first light source 11 in this embodiment is an LED (Light Emitting Diode) for a stop lamp. The LED of the first light source 11 is preferably covered with a light-transmitting sealing resin. In contrast, the second light source 12 in this embodiment is an LED for a tail lamp. The LED of the second light source 12 is also preferably covered with another light-transmitting sealing resin.

[0031] The light blocking plate 15 is attached to the body portion 14 so as to face either the first light source 11 or the second light source 12, and is a member for blocking at least the light emitted from the light source on the side that is not facing. Although not particularly limited, the light blocking plate 15 of this embodiment is disposed so as to face the second light source 12, as shown in FIG.

[0032] As described above, the first light source 11 in this embodiment corresponds to the light source for the stop lamp, and the second light source 12 corresponds to the light source for the tail lamp. Here, the first light source 11 is made up of four LEDs. In contrast, the second light source 12 is made up of one LED (see FIG. 4; however, the number of LEDs making up both light sources and the arrangement of the LEDs are not limited to this).

[0033] Therefore, a larger driving current flows to the first light source 11 side than to the second light source 12. As a result, the amount of heat generated when the first light source 11 emits light is greater than the amount of heat generated when the second light source 12 emits light. As shown in FIG. 2, the light shading plate 15 is in close contact with either the first light source 11 or the second light source 12. Therefore, if the light shading plate 15 is placed opposite a light source that generates a large amount of heat, there is an increased risk that the light shading plate 15 will be deformed or damaged by the heat from the light source. To reduce such a risk, the light shading plate 15 in this embodiment is disposed so as to face the second light source 12, which generates a relatively small amount of heat.

[0034] Furthermore, the light blocking plate 15 of this embodiment has an irradiation light passing hole 151 that passes the irradiation light from either the first light source 11 or the second light source 12 (in this embodiment, the irradiation light from the second light source 12). As shown in FIG. 2, the irradiation light passing hole 151 of the light blocking plate 15 faces the second light source 12. Furthermore, the light blocking plate 15 is attached (hangs) across the peripheral wall 141 (edge ​​142 of the peripheral wall 141) of the body portion 14 so as to traverse the area facing the second light source 12.

[0035] 5, a light-shielding rib 153 that protrudes rearward from a predetermined position on the outer periphery of the irradiation light passing hole 151 is preferably provided on the back surface 152 of the light-shielding plate 15. Although not particularly limited, an example of the shape of the light-shielding rib 153 is a generally cylindrical shape that follows the periphery of the irradiation light passing hole 151, as shown in FIG. 5(a). Alternatively, as shown in FIG. 5(b), the light-shielding rib 153 may have an arch-shaped wall portion 154 that follows the upper side of the periphery of the irradiation light passing hole 151, and leg-shaped wall portions 155a and 155b that are connected to both ends of the arch-shaped wall portion 154 and extend toward the bottom surface of the light-shielding plate 15.

[0036] 6 , the light entrance surface 41 of the first light guide 40 faces the first light source 11. Furthermore, the light entrance surface 51 of the second light guide 50 faces the second light source 12 via the light shielding plate 15. The provision of the light shielding plate 15 prevents the light emitted from the first light source 11 from entering the light entrance surface 51 of the second light guide 50 facing the second light source 12. Similarly, the light emitted from the second light source 12 is prevented from entering the light entrance surface 41 of the first light guide 40 facing the first light source 11. This prevents light from being emitted from an unintended area on the front side of the vehicle lamp 1.

[0037] More specifically, the light emitted from the first light source 11 is intended to be guided to the first light guide 40 and emitted from the first inner lens 60. In contrast, if the light source unit 10 is not provided with the light shielding plate 15, part of the light emitted from the first light source 11 leaks to enter the light entrance surface 51 of the second light guide 50 facing the second light source 12. Therefore, the light emitted from the first light source 11 that leaks toward the light entrance surface 51 of the second light guide 50 may be guided to the second light guide 50 and emitted from the second inner lens 70, which is not intended to emit light based on the light emitted from the first light source 11. According to this embodiment, it is possible to prevent the light emitted from the first light source 11 from emitting from the second inner lens 70.

[0038] Furthermore, if the light source unit 10 is not provided with the light shielding plate 15, the light emitted from the second light source 12 may be guided to the first light guide 40 facing the first light source 11 and may exit from the first inner lens 60, which is not intended to emit light based on the light emitted from the second light source 12. According to the present embodiment, it is possible to prevent the light emitted from the second light source 12 from exiting from the first inner lens 60.

[0039] Furthermore, as will be described later, the provision of the light-shielding rib 153 on the light-shielding plate 15 more effectively prevents the light emitted from the first light source 11 from entering the light-entering surface 51 of the second light guide 50 facing the second light source. Similarly, the light emitted from the second light source 12 from entering the light-entering surface 41 of the first light guide 40 facing the first light source.

[0040] Next, the function of the light blocking plate 15 will be described with reference to Fig. 7. Here, Fig. 7 is a vertical cross-sectional view of the light source unit 10 according to this embodiment. As shown in Fig. 7, the light component L11 irradiated to the lateral side of the first light source 11 is blocked by the light blocking plate 15. As a result, the light component L11 does not reach the light incident surface 51 of the second light guide 50.

[0041] Furthermore, the light component L12 irradiated to the side of the first light source 11 travels to the second light guide 50 side, but enters the second light guide 50 from the side surface of the second light guide 50. As described above, the light component L12 does not enter the second light guide 50 from the light entrance surface 51, and is therefore emitted to the outside of the second light guide 50 from the other side surface of the second light guide 50. That is, the light component L12 is also guided to the second light guide 50, and is not a light component that is emitted from the second inner lens 70. In other words, the provision of the light shielding plate 15 (light shielding rib 153) prevents the irradiation light from the first light source 11 from entering the light entrance surface 51 of the second light guide 50.

[0042] 7, the light component L21 irradiated laterally from the second light source 12 is blocked by the light blocking plate 15. As a result, the light component L21 does not reach the light incident surface 41 of the first light guide 40.

[0043] Furthermore, the light component L22 irradiated to the side of the second light source 12 travels to the first light guide 40 side, but enters the first light guide 40 from the side surface of the first light guide 40. In this way, the light component L22 does not enter the first light guide 40 from the light entrance surface 41, and is therefore emitted to the outside of the first light guide 40 from the other side surface of the first light guide 40. In other words, the light component L22 is also guided to the first light guide 40, and is not a light component that is emitted from the first inner lens 60. In other words, the provision of the light shielding plate 15 (light shielding rib 153) prevents the irradiation light from the second light source 12 from entering the light entrance surface 41 of the first light guide 40.

[0044] In this way, by providing the light shielding plate 15 facing either the first light source 11 or the second light source 12, it is possible to prevent light leakage from both the first light source 11 and the second light source 12. According to this embodiment, it is possible to prevent problems caused by light leakage from both light sources while suppressing a rise in costs.

[0045] The embodiments of the present invention have been described above in detail. However, the above description is provided to facilitate understanding of the present invention and is not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit of the present invention. Furthermore, the present invention includes equivalents thereof.

[0046] For example, in this embodiment, light is guided to the outer lens side via the rod-shaped first light guide 40 extending from the first light source 11 and the rod-shaped second light guide 50 extending from the second light source 12, but the light guide method is not limited to this. For example, the light emitted from the first light source 11 and the second light source may be guided to the outer lens side via another light guide (light guide plate) connected to the first light guide 40 and the second light guide 50. [Explanation of symbols]

[0047] 1... Vehicle lighting fixtures 10... Light source unit 11... 1st light source 12…Second light source 13... Circuit board 14... Body 15... Shade 151... Irradiation light passage hole 153... Blackout rib 16... Heat sink 20... Housing 30...Outer lens 40... 1st light guide 41... Light incident surface of first light guide 50…Second light guide 51... Light incident surface of second light guide 60... First inner lens 70... Second inner lens

Claims

1. A first light source; A second light source; a substrate on which the first light source and the second light source are mounted; a body portion that houses the substrate; a light blocking plate attached to the body portion so as to face the second light source; a first light guide having a light entrance surface facing the first light source and a light guide region extending from the light entrance surface facing the first light source; a second light guide having a light incident surface facing the second light source and a light guiding region extending from the light incident surface facing the second light source, the second light guide being disposed so that the light incident surface facing the second light source faces the second light source via the light blocking plate; Equipped with the first light source is disposed near the second light source, and is arranged at a position where irradiation light from the first light source is guided through the first light guide and a part of the irradiation light enters a light entrance surface of the second light guide when the light blocking plate is not provided; the light-shielding plate has an irradiation light passage hole through which the irradiation light from the second light source passes, and is disposed with a gap between itself and the light-entering surface of the second light guide; the irradiation light passing hole is sized to allow a light component of the light irradiated from the second light source that is irradiated toward the light incident surface of the second light guide to pass through, and to prevent a light component of the light irradiated from the second light source that is irradiated laterally toward the first light guide from entering the light incident surface of the first light guide, The light blocking plate is attached to the body portion so as to block light emitted from the first light source from entering the light entrance surface of the second light guide and to block light emitted from the second light source from entering the light entrance surface of the first light guide. A vehicle lamp characterized by:

2. The light blocking plate is attached to the peripheral wall of the body portion so as to cross the area facing the second light source.

2. A vehicle lamp according to claim 1.

3. A light-shielding rib is provided on the rear surface of the light-shielding plate, protruding rearward from a predetermined position on the outer periphery of the irradiation light passing hole.

3. A vehicle lamp according to claim 1 or 2.

4. The first light source is a light source that is composed of a plurality of LEDs and performs a first lamp function, The second light source is a light source that performs a lamp function different from the first lamp function.

4. A vehicle lamp according to claim 1.

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