JPH09231813A - Lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a lamp during lighting look novel and different from the conventional lamp as viewed from the outside. SOLUTION: The reflecting surface of a reflecting mirror 14 for reflecting light from a light source is constituted with a plurality of reflecting surface elements 18s concentrically and radially divided round a light axis Ax, and a diffusion lens 16 arranged in the front of the reflecting mirror 14 is constituted with a plurality of lens elements 16s radially divided round the light axis Ax. The reflecting surface 18 is lit in a scattered point pattern in equal pitch in the diameter direction and in the circumferential direction of the light axis Ax. The scattered dot reflecting light pattern is further scattered in the circumferential direction by the diffusion function of the diffusion lens 16, and a lamp is lit in a chrysanthemum pattern.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lamp used for vehicles, general purposes and various other purposes.

2. Description of the Related Art Conventionally, various types of lamps have been proposed. As a lamp configured to emit diffused light, a light source 2 and a light source 2 are provided as shown in FIG. It is known to include a reflecting mirror 4 that reflects the light from the front and a diffusion lens 6 that is provided in front of the reflecting mirror 4.

However, in the above-mentioned conventional lamp, most of the light diffusion function is performed by the diffusion lens 6, so that when the diffused illumination light is to be obtained, the diffusion lens 6 does not work. There is a problem that a large load is applied, and thus light cannot be emitted over a wide angle range. Further, in the above-mentioned conventional lamp, since the reflected light from the reflecting mirror 4 enters the diffusing lens 6 in a lump, when the lamp is observed from the outside at the time of lighting, the way it shines is mediocre and novel, and it is not very visible. There is a problem that it does not look good. Such a problem is, for example, in a vehicle lamp such as a vehicular marker lamp, in which, in addition to the original lighting function of the lamp, the appearance (lighting) of the lamp when it is turned on is important. This is a particularly important issue. On the other hand, if the reflecting mirror also has a light diffusing function, it is possible to secure a wide irradiation angle without imposing a heavy burden on the lens.
If a plurality of irregularities is provided on the reflecting surface in order to have a light diffusing function, it is possible to prevent the reflected light from the reflecting surface from being collected and entering the diffusing lens. However, in this case, if the unevenness of the reflecting surface is simply arranged, it will not be possible to enhance the appearance of the lamp when it is lit when viewed from the outside. . The present invention has been made in view of such circumstances, and an object of the present invention is to provide a lamp having excellent appearance when turned on.

SUMMARY OF THE INVENTION The present invention achieves the above object by using a plurality of reflecting surface elements that are regularly divided about the optical axis of a reflecting mirror as constituent elements of the reflecting surface. It was done like this. That is, the present invention provides a lamp including a light source, a reflecting mirror that reflects the light from the light source forward, and a diffusion lens provided in front of the reflecting mirror, as described in claim 1. The reflecting surface of the reflecting mirror is provided with a plurality of reflecting surface elements that are concentrically and radially divided with the light source as a center. "Multiple reflective surface elements"
Is not particularly limited as long as it is concentrically and radially divided about the optical axis of the reflecting mirror, and the surface shape and other configurations of each reflecting surface element. For example, each of the reflective surface elements may be formed to deflect and reflect the light from the light source, or may be formed to diffusely reflect the light from the light source. The "plurality of reflective surface elements" may be formed over the entire reflective surface, or may be formed only in a partial area thereof.

As described above, in the present invention, the reflecting surface of the reflecting mirror is provided with a plurality of reflecting surface elements which are concentrically and radially divided about the optical axis of the reflecting mirror. Therefore, the reflecting surface shines discretely at predetermined intervals in the radial direction and the circumferential direction with respect to the optical axis. Then, the discrete reflected light pattern is further dispersed by the diffusing function of the diffusing lens, and the lamp is lit in the discrete pattern while maintaining the regularity in the radial direction and the circumferential direction. As a result, when the lit lamp is lit from outside, it can be made to appear to shine with a novel lighting method that is not available in conventional lamps. As described above, according to the present invention, it is possible to obtain a lamp that is excellent in appearance when turned on. Further, by adopting the configuration of the present invention, when the reflecting surface is observed through the diffusing lens even when it is not lit, the reflecting surface having concentric and radial regularity is located at the back of the diffusing lens. Since it can be seen with a mark, it is possible to make the lamp exhibit an ordered sense of depth. In the above configuration, as described in claim 2, if each reflecting surface element is configured to diffusely reflect the light from the light source in the radial direction and the circumferential direction with respect to the optical axis, the reflective surface element can be removed in a state where the lens is removed. The reflecting surface element can be made to appear to shine in a scattered manner at predetermined intervals in the radial direction and the circumferential direction with respect to the optical axis, and thus, when the diffuser lens is arranged in front of the reflecting mirror, It is possible to illuminate the lamp with a scattered pattern in which the dotted pattern is further emphasized. As a specific configuration example of the reflecting surface element for diffusing and reflecting the light from the light source in the radial direction and the circumferential direction in this manner, as described in claim 3, a predetermined reference curved surface and the reference curved surface are provided. Can adopt a method of allocating curved surfaces (including planes) having different curvatures. In this case, the reference curved surface may be a single curved surface such as a paraboloid of revolution or a plurality of curved surfaces. At this time, if the reference curved surface is constituted by a paraboloid of revolution having the optical axis as the central axis, it is possible to make each reflecting surface element shine substantially evenly when viewed from the front of the lamp. Can be When the reference curved surface is composed of a plurality of curved surfaces, the same effect can be obtained by configuring it with a so-called multiple parabolic surface. At this time, as described in claim 5, the multiple paraboloids are a plurality of paraboloids of rotation arranged concentrically with different focal lengths with one point on the optical axis as a common focal point. If the parabolic surface is closer to the optical axis and has a plurality of parabolic surfaces whose focal length is set to a shorter value, the reflecting mirror can be made thinner, and the lighting fixture can be made thinner accordingly. Can be achieved. Further, as described in claim 6, if the surface shape of each of the reflecting surface elements is set to a convex spherical surface shape, the processing of the reflecting mirror molding die can be easily performed using an end mill or the like. You can The size of each of the reflective surface elements may be set to be substantially the same or different from each other. However, as described in claim 7, each of the reflective surface elements is set. By setting the width in the radial direction of the reflective surface element closer to the optical axis to a smaller value, the light emitting area of each reflective surface element from the inner peripheral portion to the outer peripheral portion of the reflective surface in a front view of the lamp. Is gradually increased, so that the appearance can be improved by the gradation effect. Further, the array of the reflective surface elements is not limited to a specific array as long as it has concentric and radial regularity. For example, as described in claim 8, If the pitch of the elements in the circumferential direction is shifted by a half pitch between the adjacent reflecting surface elements in the radial direction, it is possible to create novelty in how the reflecting surface shines. The specific configuration of the “diffusing lens” is not particularly limited, but as described in claim 9, it may be a configuration including a plurality of lens elements radially divided about the optical axis. For example, since a group of reflected lights that radiate discretely at predetermined intervals in the radial direction and the circumferential direction with respect to the optical axis can be diffused and transmitted by further providing a radial regularity with a diffusing lens, the scattered light is scattered in the circumferential direction. The lamp can be lit specifically (eg, a pattern of chrysanthemums or fireworks). The present invention relates to a vehicle lamp, a general lighting lamp used indoors and outdoors,
It is applicable to guide display lamps, display lighting lamps, portable lamps, and other lamps used for various purposes, but when applied to vehicular marker lamps where the appearance of the lamp itself when turned on is extremely important. Especially effective for.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing a lamp according to an embodiment of the present invention, and FIG. 2 is a view taken in the direction of arrow II. The lamp 10 according to the present embodiment is a vehicular marker lamp, and includes a light source 12, a reflecting mirror 14 that reflects the light from the light source 12 forward, and a diffusing lens 16 provided in front of the reflecting mirror 14. The outer shape of the lamp when viewed from the front is set to be circular. The reflecting surface 18 of the reflecting mirror 14 is formed on a reference curved surface 18o constituted by a paraboloid of revolution having the optical axis Ax of the reflecting mirror 14 as a central axis.
As shown in FIG. 3, a plurality of fan-shaped reflecting surface elements 18s, which are concentrically divided at equal intervals around the optical axis Ax and radially radially at equal intervals, are allocated. At this time, each of the reflecting surface elements 18s is allocated such that the pitch in the circumferential direction is shifted by a half pitch between the adjacent reflecting surface elements in the radial direction. The light source 12 is a bulb having a C-6 type filament 12a, and is attached to the rear top portion of the reflecting mirror 14 via the socket 20 so that the filament 12a is located at the focal point F of the reference curved surface 18o. ing. As shown in FIG. 1, the cross-sectional shape of each reflecting surface element 18s has a surface shape set to a convex spherical shape (fish-eye shape), which allows the light from the light source 12 to pass through the optical axis Ax. Direction and the circumferential direction are diffusely reflected. The diffusion lens 16 has an optical axis A as shown in FIG.
It is provided with a plurality of lens elements 16s radially divided at equal intervals around x. Each of these lens elements 16s has a cross-sectional shape in the circumferential direction set to a convex arc shape as shown in FIG. Thus, the reflected light from the reflecting surface 18 is diffused and transmitted in the circumferential direction with respect to the optical axis Ax. When the lens elements 16s are radially divided as described above, the center thereof becomes one point (a point on the optical axis Ax), and it is difficult to form the lens elements 16s accurately in terms of die processing. ,
A small circular region 16a formed in a fisheye lens shape is set at the center of the lens of the diffusion lens 16. Next, the operation of the present embodiment will be described. When parallel light is incident on the diffusing lens 16 from the rear side, when observing the parallel light from the front side, the diffusing lens 16 is
As shown in (a), it appears to radiate in a uniform pitch.
This is because the parallel light is diffused in the circumferential direction by the lens action of each of the plurality of lens elements 16s. On the other hand, the light incident on the reflecting surface 18 from the light source 12 (accurately from the filament 12a) is moved in the radial direction and the circumferential direction by each of the plurality of reflecting surface elements 18s formed on the reflecting surface 18. Since it is diffusely reflected, when it is observed from the front side, the reflecting surface 18 is
The central portions of the plurality of reflective surface elements 18s appear to shine.
Then, as shown in FIG. 6B, the entire reflecting surface 18 has an equal pitch in the radial direction and the circumferential direction, and bright portions adjacent to each other in the radial direction have a half pitch in the circumferential direction. It seems to shine like a scattered spot. At that time, since the reference curved surface 18o of the reflecting surface 18 is configured by a paraboloid of revolution having the optical axis Ax as the central axis, all the reflecting surface elements 18s appear to shine almost uniformly. Therefore, when the diffusing lens 16 is arranged in front of the reflecting mirror 14, as shown in FIG.
The scattered light pattern shown in FIG.
Since the lamps 10 are further dispersed in the circumferential direction by 6, the bright parts of the reflected light pattern shown in FIG. 6 (b) are thinned in the circumferential direction as shown in FIG. 6 (c) when the lamp 10 is observed from the front side. It will shine in a chrysanthemum-like scattered pattern. When the lamp 10 is observed obliquely from the front, the positional relationship between the diffusing lens 16 and the reflecting surface 18 is deviated, but the lens elements 16s and the reflecting surface elements 18 are the same.
Since s has a light diffusing function, the patterns of how the diffusing lens 16 and the reflecting mirror 14 shown in FIGS. 6 (a) and 6 (b) shine compared to the patterns when observed from the front front. Therefore, the lamp 10 is deformed to some extent.
Will shine in a pattern close to the scattered pattern shown in FIG. As described above in detail, in the present embodiment, the reflecting surface 18 of the reflecting mirror 14 has a plurality of reflection / diffusion functions which are divided at equal intervals in the radial direction and the concentric circles about the optical axis Ax of the reflecting mirror 14. Reflective surface element 18s having
Therefore, the reflecting surface 18 shines in a scattered manner at equal intervals in the radial direction and the circumferential direction with respect to the optical axis Ax. Then, this scattered light pattern is scattered by the diffusing function of the diffusing lens 16, and the lamp 10 shines in a scattered pattern while maintaining the regularity in the radial direction and the circumferential direction. As a result, when the lamp 10 when it is turned on is observed from the outside, it can be made to appear to shine with a novel lighting method that is not available in conventional lamps. As described above, according to the present embodiment, it is possible to obtain a lamp that is excellent in appearance when turned on. Further, by adopting the configuration of the present embodiment, even when not lit, when the reflecting surface 18 is observed through the diffusion lens 16 as shown in FIG. 2, the reflection having concentric and radial regularity is obtained. Since the surface 18 can be seen at a distance toward the back of the diffuser lens 16 having the radial regularity, the lamp 10 can have an ordered sense of depth. In the above embodiment, the reflective surface elements 18s and the lens elements 16s are both formed with an equal pitch, but it is needless to say that these pitches may be changed. In comparison with the above-mentioned embodiment, it is possible to obtain a lighting tool having a pattern with an accent. Further, in the above-described embodiment, the reflecting surface element 1 whose surface shape is set to the convex spherical shape.
8s has been described. However, the concave spherical reflecting surface element 18sA shown in FIG.
A corrugated reflection surface element 1 having a cross-sectional shape as shown in FIG.
8sB may be adopted, and in these cases, the light source 12
Since the light from the can be diffused and reflected in the radial direction and the circumferential direction, it is possible to obtain a lamp having a lighting method similar to that of the above embodiment. On the other hand, in place of the reflecting surface element 18s having such a diffuse reflection function, the cross-sectional shape in the radial direction, the circumferential direction, or both directions is shown in FIGS.
Reflection surface elements 18sC and 18sD that are set to have a cross-sectional shape as shown in FIG. 3D and that deflect and reflect the light from the light source 12 in the radial direction or the circumferential direction may be employed. It is possible to obtain a lighting device having a different lighting style from the form. Furthermore, in the above-described embodiment, as shown in FIG. 3, the reflecting surface elements 18s are arranged on the reference curved surface 18o at equal pitches in the radial direction and the circumferential direction about the optical axis Ax, and Although the pitch in the circumferential direction is shifted by a half pitch between the reflecting surface elements adjacent to each other in the radial direction, other layout methods may be adopted. For example, as opposed to the case of FIG. 3, as shown in FIG. 8, the radial pitch of each reflecting surface element 18s is shifted by a half pitch between the adjacent reflecting surface elements in the circumferential direction. Alternatively, as shown in FIG. 9, while the pitch in the circumferential direction and the pitch in the radial direction are made uniform, the radial width of each reflecting surface element 18s is directed from the inner peripheral portion to the outer peripheral portion of the reflecting surface 18. May be gradually set to a wider range. By changing the arrangement method in this manner, it is possible to obtain a lighting device having a different lighting style from the above embodiment. The lens element 16s of the diffusing lens 16 is also shown in FIGS. 7 (a) and 7 (b) given as modified examples of the reflecting surface element instead of the convex arcuate cross-sectional shape as in the above embodiment. It may have a concave arc shape as shown, a wavy cross-sectional shape, etc.
Since the reflected light can be diffused and transmitted in the circumferential direction,
It is possible to obtain a lamp having a lighting method similar to that of the above embodiment. Further, instead of the diffused lens 16 radially divided as in the above embodiment, the diffused lens 16A is divided concentrically as shown in FIG. 10 or the radial and concentric circles as shown in FIG. The diffusing lens 16B, and further, the diffusing lens 6 divided into a lattice shape as shown in FIG. 15 as a conventional example may be adopted. In these cases, a different way of shining from that of the above embodiment is used. You can get a lamp. In the above-described embodiment, the reference curved surface 18o of the reflecting surface 18 has been described as the reflecting mirror 14 formed of a single paraboloid of revolution, but as shown in FIG. 12, the reference curved surface 18 (1) formed of multiple paraboloids. It is also possible to employ a reflecting surface 18 with o. This reflective surface 1
Reference numeral 8 indicates a first reflecting surface 18 (1) formed in the vicinity of the optical axis Ax of the reflecting mirror 14 and a circular outer peripheral edge of the first reflecting surface 18 (1) so as to spread forward. It is composed of a second reflecting surface 18 (2) that is extended and formed in a ring shape in
The reference curved surface 18 (1) o is adopted as the first reflecting surface 18 (1). The first reflecting surface 18 (1) is composed of a plurality of reflecting surface elements 18 (1) s that are concentrically and radially divided about the optical axis Ax. The concentric divisional pitches are set such that the inner four locations are relatively narrow and the outer two locations are relatively wide. And
Each of the reflecting surface elements 18 (1) s is allocated on the reference curved surface 18 (1) o composed of a multiple paraboloid. The multiple paraboloid has a plurality of rotating paraboloids (shown by chain double-dashed lines in the figure) concentrically arranged with a single focal point F on the optical axis Ax as a common focal point and different focal lengths. The focal length is set to a shorter value for a paraboloid of revolution closer to Ax. on the other hand,
The second reflecting surface 18 (2) is composed of a plurality of reflecting surface elements 18 (2) s radially divided at equal intervals around the optical axis Ax.
Consists of As shown in FIG. 13, the radial division is performed by alternately moving the reflecting surface elements 18 (2) s in and out in the radial direction of the optical axis Ax. As described above, by constructing the reflecting surface 18 with the first reflecting surface 18 (1) and the second reflecting surface 18 (2), it becomes possible to perform reflected light irradiation different from the above embodiment. Moreover, the reference curved surface 18 (1) o of the first reflecting surface 18 (1) has the optical axis A
Since the paraboloid of revolution which is closer to x has a multi-paraboloid whose focal length is set to a shorter value, the first reflecting surface 18 (1) can be made thinner, and the second reflecting portion 18 (1) can be thinned accordingly. Face 18
The depth of (2) can be secured deeply. Or,
By setting the depth of the second reflecting surface 18 (2) to be shallow, it is possible to reduce the thickness of the lamp 10. Of course, the present invention can be applied to a lamp having an outer shape different from the circular lamp as in the above embodiment. FIG. 14 shows an example of application to a rectangular lamp 10A. In this example, the lens element 16s similar to that of the above-described embodiment is adopted, but the reflective surface element 18s is divided into a concentric rectangular shape and a radial shape with the optical axis Ax as the center in accordance with the shape of the lamp 10A. The thing is adopted. In this case also, the way the light of the lamp shines is similar to the above embodiment, but due to the difference between the circle and the rectangle,
It is possible to obtain a lighting device having a different lighting style from that of the above embodiment.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a lamp according to an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrow II in FIG. 1;

FIG. 3 shows the lamp with its diffusing lens removed.
III direction arrow view

FIG. 4 is a view in the direction of arrow IV in FIG. 1 showing the lens of the lamp.

FIG. 5 is a sectional view showing a cross-sectional shape of a lens element of the lamp.
VV line cross section of

FIG. 6 is a diagram showing the operation of the above embodiment.

FIG. 7 is a partially enlarged view of FIG. 1, showing a modified example of the cross-sectional shape of the reflecting surface element of the lamp.

FIG. 8 is a view similar to FIG. 3 showing a modified example of the reflective surface element.

FIG. 9 is a view similar to FIG. 3, showing another modification of the reflecting surface element.

FIG. 10 is a view similar to FIG. 4, showing a modified example of the diffusion lens.

FIG. 11 is a view similar to FIG. 4, showing another modification of the diffusion lens.

FIG. 12 is a partial side view showing a modified example of the reflecting surface of the lamp.

13 is a sectional view taken along line XIII-XIII in FIG.

FIG. 14 is a view similar to FIG. 2 showing a modification of the above embodiment.

FIG. 15 is a diagram showing a conventional example.

[Explanation of symbols]

10, 10A Lamp 12 Light source (bulb) 12a Filament 14, 14A, 14B Reflecting mirror 16, 16A, 16B Lens 16s Lens element 18 Reflecting surface 18o Reference curved surface (rotating parabolic surface) 18 (1) o Reference curved surface (multiple parabola) Surface) 18s, 18sA, 18sB, 18sC, 18sD, 1
8 (1) s Reflective surface element Ax Optical axis

Claims (9)

[Claims] 1. A lamp including a light source, a reflecting mirror that reflects light from the light source forward, and a diffusing lens provided in front of the reflecting mirror, wherein the reflecting surface of the reflecting mirror is the above-mentioned. A lamp comprising a plurality of reflecting surface elements that are concentrically and radially divided around a light source. 2. The lamp according to claim 1, wherein each of the reflecting surface elements is configured to diffusely reflect light from the light source in a radial direction and a circumferential direction with respect to the optical axis. 3. The lamp according to claim 2, wherein each of the reflecting surface elements is configured by allocating a curved surface having a curvature different from that of the reference curved surface on a predetermined reference curved surface. 4. The lamp according to claim 3, wherein the reference curved surface is a paraboloid of revolution having the optical axis as a central axis. 5. The reference parabolic surface is a plurality of paraboloids of revolution which are concentrically arranged with different focal lengths and have one point on the optical axis as a common focal point and which are close to the optical axis. 4. The lamp according to claim 3, comprising a plurality of paraboloids of revolution whose focal lengths are set to shorter values. 6. The surface shape of each reflecting surface element is set to a convex spherical shape.
The lamp according to any one of 5 above. 7. The radial width of each reflective surface element is:
7. The lamp according to claim 1, wherein the reflecting surface element closer to the optical axis is set to a smaller value. 8. The pitch in the circumferential direction of each reflecting surface element is shifted by a half pitch between the reflecting surface elements adjacent to each other in the radial direction, according to claim 1. Light fixture. 9. The lamp according to claim 1, wherein the diffusing lens includes a plurality of lens elements radially divided around the optical axis.