JP2023010396A - Lamp for vehicle - Google Patents

Abstract

To effectively utilize light after simplifying a structure.SOLUTION: A lamp for a vehicle comprises: a lamp outer box formed as a lamp chamber; a baseboard arranged in the lamp chamber; a plurality of light sources mounted to the baseboard while being separated in a circumferential direction; and an inner lens arranged in the lamp chamber in a state of covering the plurality of light sources, and controlling light emitted from the plurality of light sources into a state that the light progresses to prescribed directions. By this constitution, since the light emitted from the plurality of light sources which are mounted to the baseboard while being separated in the circumferential direction is controlled by the inner lens which is arranged in a state that the inner lens covers the plurality of light sources, and radiated toward the outside, all the light emitted from the light sources by the inner lens can be controlled, and the light can be thereby effectively utilized after simplifying a structure.SELECTED DRAWING: Figure 2

Description

The present invention relates to a technical field of a vehicle lamp that emits light from a plurality of light sources mounted on a substrate arranged in a lamp chamber and radiates outward.

There is a type of vehicle lamp in which multiple light sources that emit light are arranged inside a lamp housing made up of a cover and a lamp housing, and the light emitted from each light source is controlled and radiated to the outside. (See, for example, Patent Document 1). Such vehicle lamps include, for example, those that are attached to the roofs of patrol cars, construction vehicles, taxis, etc., and used as marker lights such as warning lights.

In the vehicular lamp described in Patent Document 1, a plurality of light sources are mounted on a substrate while being separated from each other in the circumferential direction, and reflectors (reflection columns) are arranged inside the plurality of substrates. Also, a cover is provided as a diffusing lens, and a cylindrical lens element is formed on a part of the cover.

In the vehicle lamp described in Patent Document 1, when light is emitted from the light source, part of the emitted light is reflected by the reflecting surface of the reflector, and the light not directed toward the reflecting surface is emitted as direct light to the outside. radiated towards. At this time, the light directed to the outside is diffused by the cylindrical lens element formed on the cover, and the diffused light is irradiated to the outside.

JP-A-9-330604

By the way, since the light emitted from the light source is emitted within a certain range of angles with respect to the optical axis direction, the light emitted from the light source may be emitted in directions other than the necessary directions. Therefore, it becomes impossible to achieve sufficient effective utilization of the light emitted from. For example, in the case of a warning light that is attached to the roof and used, the light emitted in the horizontal direction and obliquely downward provides a sufficient function. , unnecessary light is emitted, and the utilization efficiency of light is lowered.

In addition, in the vehicle lamp as described above, it is desirable that the structure is simplified and the light is effectively utilized.

SUMMARY OF THE INVENTION Accordingly, it is an object of the vehicle lamp of the present invention to achieve effective utilization of light while simplifying the structure.

A vehicular lamp according to the present invention comprises a lamp outer casing composed of a lamp housing and a cover and having an internal space formed as a lamp chamber; and an inner lens that is arranged in the lamp chamber so as to cover the plurality of light sources and controls the light emitted from the plurality of light sources so that the light beams emitted from the plurality of light sources are directed in respective predetermined directions. .

As a result, the light emitted from the plurality of light sources mounted on the substrate at intervals in the circumferential direction is controlled by the inner lens arranged so as to cover the plurality of light sources and is irradiated to the outside.

According to the present invention, the light emitted from the plurality of light sources mounted on the substrate at intervals in the circumferential direction is controlled by the inner lens disposed so as to cover the plurality of light sources and is irradiated to the outside. , it becomes possible to control all the light emitted from the light source by the inner lens, and it is possible to achieve effective utilization of the light while simplifying the structure.

An embodiment of the vehicle lamp of the present invention is shown together with FIGS. 2 to 5, and this figure is a perspective view of the vehicle lamp. 1 is an exploded perspective view of a vehicle lamp; FIG. It is sectional drawing, such as an inner lens. FIG. 4 is a perspective view of a lamp unit showing an example provided with a reflector; FIG. 4 is a perspective view showing a configuration in which substrates and the like are stacked;

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments for implementing the vehicle lamp of the present invention will be described below with reference to the accompanying drawings.

The vehicle lamp 1 is attached to the roof of, for example, a patrol car or construction vehicle, or attached to the body of a so-called police motorcycle such as a patrol bike, and used as a warning light or other indicator light. However, the vehicle lamp 1 is not limited to a marker lamp such as a warning light, and may be another vehicle lamp attached to the vehicle body. In the following description, the front, back, top, bottom, left, and right directions will be described with the direction in which light emitted from the vehicle lamp 1 is upward. However, the front, rear, up, down, left, and right directions shown below are for convenience of explanation, and the implementation of the present invention is not limited to these directions.

A vehicle lamp 1 includes a lamp housing 2 having an opening at its upper end and a cover 3 closing the opening of the lamp housing 2 (see FIGS. 1 and 2). The lamp housing 2 is formed, for example, in the shape of a shallow container, and the cover 3 is formed, for example, in the shape of a shallow container that opens downward. A lamp housing 4 is formed by the lamp housing 2 and the cover 3 , and an internal space of the lamp housing 4 is formed as a lamp chamber 5 . The lamp housing 4 has, for example, a substantially cylindrical outer peripheral portion and a flat shape with a low height.

The lamp housing 2 has a disk-shaped bottom surface portion 2a facing in the vertical direction and a cylindrical peripheral surface portion 2b protruding upward from the outer peripheral portion of the bottom surface portion 2a. The cover 3 has a disk-shaped top surface portion 3a facing in the vertical direction and a cylindrical peripheral portion 3b protruding downward from the outer peripheral portion of the top surface portion 3a. The lamp housing 4 is formed by joining the peripheral surface portion 2b of the lamp housing 2 and the peripheral portion 3b of the cover 3 together.

A lamp unit 6 is arranged in the lamp chamber 5 . The lamp unit 6 has a substrate 7 , a plurality of light sources 8 and a plurality of inner lenses 9 .

The substrate 7 is formed, for example, in the shape of a disk facing up and down, and has a control circuit section (not shown) for controlling the lighting and extinguishing of the plurality of light sources 8 on the bottom surface. The thickness direction of the substrate 7 is the vertical direction, and the thickness direction coincides with the joining direction of the lamp housing 2 and the cover 3 . The board 7 is attached to the lamp housing 2 from above, and the mounting direction of the board 7 with respect to the lamp housing 2 is aligned with one of the directions in which the lamp housing 2 and the cover 3 are coupled.

As the light source 8, for example, a light emitting diode (LED) is used. The light sources 8, 8, . For example, six light sources 8 are provided. However, the number of light sources 8 mounted on the substrate 7 is not limited to six, and a plurality of light sources 8 other than six may be mounted on the substrate 7 so as to be spaced apart in the circumferential direction. Light is emitted upward from the light source 8 , and the optical axis direction of the light source 8 is aligned with the thickness direction of the substrate 7 .

Each part of the inner lens 9 is integrally formed of, for example, a transparent material, and is composed of an attached part 10, an intermediate part 11, and a light control part 12 (see FIG. 3). However, it is sufficient that the inner lens 9 is provided with at least the attached portion 10 and the light control portion 12 .

The attached portion 10 is formed in a thin and flat shape, for example, in a substantially rectangular shape. A light source arrangement hole 10 a is formed in the central portion of the attached portion 10 .

The intermediate portion 11 is formed, for example, in a substantially annular shape, and is provided between the attached portion 10 and the light control portion 12 in the vertical direction.

The light control portion 12 is formed in a shape protruding upward from the intermediate portion 11 and has a function of controlling the light emitted from the light source 8 to travel in a predetermined direction.

The light control section 12 has a circular outer shape, and has a recess opening downward at its lower end, and the surface forming this recess is formed as an incident surface 12a. The upper surface of the light control section 12 is formed as an inclined surface that is displaced downward from the outer periphery toward the center, and this inclined surface is formed as a reflection control surface 12b. The light control portion 12 is formed as an emission surface 12c having a circular outer peripheral surface. The output surface 12c may be processed to diffuse the light by, for example, embossing, steps, or the like.

The inner lens 9 is arranged on the substrate 7 so as to cover the light source 8 from above. The inner lens 9 is arranged such that its longitudinal direction coincides with the radial direction connecting the center of the substrate 7 and the outer periphery thereof. By arranging the inner lenses 9, 9, . . . 8, .

When the inner lens 9 is arranged on the substrate 7 , the light source 8 is positioned in the light source arrangement hole 10 a of the mounting portion 10 and the incident surface 12 a is positioned right above the light source 8 .

In the vehicle lamp 1, when light P is emitted from the light source 8, the emitted light P is incident on the inner lens 9 through the incident surface 12a. The light P incident from the entrance surface 12a is refracted at the entrance surface 12a toward the reflection control surface 12b, internally reflected (total reflection) at the reflection control surface 12b, and directed toward the exit surface 12c. The light P directed toward the emission surface 12c is emitted from the emission surface 12c, transmitted through the peripheral portion 3b of the cover 3, and irradiated laterally. At this time, since the exit surface 12c is formed as a circumferential surface, the light P is irradiated in 360-degree directions in the substantially horizontal direction.

As described above, in the vehicle lamp 1, the light is controlled by the inner lens 9, and the light is not emitted upward. Illusion light can be suppressed. In addition, since the generation of dazzling light can be suppressed without using a shade or the like, unnecessary light can be shielded without increasing the number of parts.

Note that the color of the light emitted from the light source 8 may be changed as necessary, and for example, the light source 8 may emit light of white, red, or the like. When colored light is emitted from the light source 8, the cover 3 is colored, for example, red, and the light that is transmitted through the cover 3 and emitted to the outside is emitted as colored light. On the other hand, when colored light, for example red light, is emitted from the light source 8, the cover 3 is formed transparent, and the light transmitted through the cover 3 and emitted to the outside is emitted as colored light. .

Further, the vehicle lamp 1 is provided with a plurality of light sources 8, 8, . . . It is possible to create a light irradiation state in which the lamp unit 6 is radiated outward in order in the direction, and the light is visually recognized as if the lamp unit 6 is rotating.

Furthermore, by turning on and off the light sources 8, 8, . . .

Although an example in which a plurality of inner lenses 9 are provided has been shown above, a configuration in which a plurality of inner lenses 9 are integrally formed is also possible. For example, the attached portions 10, 10, . If there is only one inner lens, the number of parts can be reduced, and the inner lens can be easily attached to the substrate 7 in a short time.

As described above, in the vehicular lamp 1, the substrate 7 arranged in the lamp chamber 5, the plurality of light sources 8 mounted on the substrate 7 in a circumferentially spaced relationship, and the plurality of light sources 8 are covered. An inner lens 9 is provided in the lamp chamber 5 and controls the light beams emitted from the plurality of light sources 8 so as to direct the light beams in predetermined directions.

Therefore, the light emitted from the plurality of light sources 8 mounted on the substrate 7 so as to be spaced apart in the circumferential direction is controlled by the inner lens 9 arranged so as to cover the plurality of light sources 8 and is irradiated to the outside. , all the light emitted from the light source 8 can be controlled by the inner lens 9, so that the structure can be simplified and the light can be effectively utilized.

Further, the coupling direction of the lamp housing 2 and the cover 3 is aligned with the thickness direction of the substrate 7, and the optical axis direction of the light source 8 is aligned with the thickness direction of the substrate 7. FIG.

Accordingly, the dimension of the lamp chamber 5 in the thickness direction of the substrate 7 is reduced, and the light emitted from the light source 8 is controlled by the inner lens 9 to irradiate in a direction different from the coupling direction of the lamp housing 2 and the cover 3. Therefore, it is possible to reduce the thickness of the vehicle lamp 1 and irradiate the light emitted from the light source 8 in a desired direction.

Further, the substrate 7 is attached to the lamp housing 2, the inner lens 9 is attached to the substrate 7, the attachment direction of the substrate 7 to the lamp housing 2 is aligned with one of the coupling directions of the lamp housing 2 and the cover 3, and the inner lens 9 is attached to the lamp housing 2. The mounting direction of the lens 9 with respect to the substrate 7 matches the mounting direction of the substrate 7 with respect to the lamp housing 2 .

Accordingly, the mounting of the substrate 7 to the lamp housing 2, the mounting of the inner lens 9 to the substrate 7, and the connection of the cover 3 to the lamp housing 2 are all performed in the same direction. can be achieved.

The vehicle lamp 1 may be provided with a reflector 13 for reflecting light (see FIG. 4). When the reflector 13 is provided, for example, an insertion hole is formed in the center of the substrate 7 , the reflector 13 is inserted into the insertion hole, and the lower end is attached to the bottom surface 2 a of the lamp housing 2 . The reflector 13 is formed in a cylindrical shape with an axial direction extending vertically, and has, for example, a hexagonal outer shape.

Each part of the outer peripheral surface of the reflector 13 is formed as reflecting surfaces 13a, 13a, . . . which are continuous in the circumferential direction. The reflective surface 13a is formed, for example, in a planar shape. However, the reflecting surface 13a may be formed in a convex or concave shape.

In the above example, the reflector 13 has a hexagonal outer shape. It may be formed in other shapes, if any. In addition, the reflector 13 may not have the entire outer peripheral surface formed as a reflective surface, and a part of the outer peripheral surface may be formed as a reflective surface. It may be a configuration or the like formed in the .

The reflector 13 has a non-circular outer shape. Accordingly, the insertion hole of the substrate 7 is also formed in a non-circular shape corresponding to the outer shape of the reflector 13 .

When the vehicle lamp 1 is provided with the reflector 13 in this manner, the light emitted from the emission surfaces 12c, 12c, . . . of the inner lenses 9, 9, . . . , is transmitted through the cover 3, and is irradiated to the outside.

Therefore, the light emitted from the exit surface 12c of the inner lens 9 is less likely to reach the other inner lens 9, and the light is less likely to be reflected by the other inner lens 9 and travel in an unintended direction. The lights emitted from 12c, . . . toward the central portion of the substrate 7 do not interfere. As a result, reflection of light in unnecessary directions can be prevented, and luminance can be improved by effectively using light.

In addition, when the light is emitted from the emission surface 12c, the light source 8 is reflected on the reflection surface 13a of the reflector 13, and the number of the light sources 8 is visually recognized as if there are more than the actual number. It is possible to improve the quality.

Furthermore, the outer shape of the reflector 13 is formed in a non-circular shape, and an insertion hole into which the reflector 13 is inserted is formed in the substrate 7 .

Therefore, since the reflector 13 formed in a non-circular shape is inserted into the insertion hole of the substrate 7 and arranged in the center of the plurality of light sources 8, the positioning of the reflector 13 with respect to the light sources 8 is performed by the outer shape of the reflector 13. , the reflector 13 can be positioned with respect to the light source 8 while simplifying the structure without requiring a special positioning means for the reflector 13 with respect to the light source 8 .

In the vehicle lamp 1, a plurality of substrates 7 on which the light sources 8, 8, . . . are mounted and the inner lenses 9, 9, . It is also possible (see FIG. 5).

In such a configuration, it is possible to change the color of the light emitted from the light sources 8 in each stage, change the order of turning on and off the light sources 8 in each stage, and change the flickering pattern of the light sources 8 in each stage. This makes it possible to improve the degree of freedom in the irradiation state. For example, in a configuration in which the substrates 7, 7 are arranged in two stages, the light emitted from the light source 8 at the upper stage and the light emitted from the light source 8 at the lower stage may be different colors, or the light emitted from the light source 8 at the upper stage may Light is emitted in a circular direction, and the light source 8 in the lower stage emits light in the counterclockwise direction in order. , the light source 8 is turned on, and the top and bottom are alternately turned on and off.

DESCRIPTION OF SYMBOLS 1... Vehicle lamp, 2... Lamp housing, 3... Cover, 4... Lamp outer housing, 5... Lamp chamber, 7... Substrate, 8... Light source, 9... Inner lens, 13... Reflector

Claims (5)

a lamp outer housing composed of a lamp housing and a cover and having an internal space formed as a lamp chamber;
a substrate disposed in the lamp chamber;
a plurality of light sources mounted on the substrate at intervals in the circumferential direction;
and an inner lens arranged in the lamp chamber in a state of covering the plurality of light sources, and controlling the light emitted from the plurality of light sources so that the light beams are directed in predetermined directions. the coupling direction of the lamp housing and the cover is aligned with the thickness direction of the substrate;
The vehicle lamp according to claim 1, wherein the optical axis direction of the light source is aligned with the thickness direction of the substrate. the substrate is attached to the lamp housing;
the inner lens attached to the substrate,
a direction in which the substrate is attached to the lamp housing is aligned with one direction in which the lamp housing and the cover are coupled;
3. The vehicle lamp according to claim 2, wherein the mounting direction of the inner lens with respect to the substrate coincides with the mounting direction of the substrate with respect to the lamp housing. A reflector is provided for reflecting the light emitted from each of the plurality of light sources,
4. The vehicle lamp according to claim 1, wherein the reflector is arranged inside the plurality of light sources. the outer shape of the reflector is formed in a non-circular shape,
5. The vehicle lamp according to claim 4, wherein an insertion hole into which the reflector is inserted is formed in the substrate.

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