JP3190818B2 - Lamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Various types of lamps have heretofore been proposed. As a lamp configured to emit diffused light, a light source 2 and a light source 2 as shown in FIG. There is known a device provided with a reflecting mirror 4 for reflecting light from the front, and a diffusion lens 6 provided in front of the reflecting mirror 4.

[0003]

However, in the above-mentioned conventional lamp, most of the light diffusion function is performed by the diffusion lens 6, so that if the diffused illumination light is to be obtained, There is a problem that a large load is applied, and therefore, light cannot be irradiated over a very wide angle range. Further, in the above-mentioned conventional lamp, since the reflected light from the reflecting mirror 4 enters the diffusion lens 6 as a lump, when the lamp is observed from the outside at the time of lighting, the light is mediocre and lacks novelty. There is a problem that the appearance is not good. Such a problem is, for example, in a lamp such as a vehicle marker light, in which the appearance (lighting) of the lamp when lit is observed from the outside in addition to the original lighting function of the lamp, is regarded as important. This is particularly important.

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 large burden on the lens.
If a plurality of irregularities are provided on the reflecting surface in order to have a light diffusing function, it is possible to prevent the light reflected from the reflecting surface from entering the diffusion lens as one unit. However, in this case, simply arranging irregularities on the reflecting surface casually merely causes the lamp to illuminate messyly when observed from the outside when the lamp is lit, and there is a problem that the appearance of the lamp cannot be enhanced. .

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a lamp having an excellent appearance when lit.

[0006]

According to the present invention, the above object is achieved by using a plurality of reflecting surface elements which are regularly divided around the optical axis of a reflecting mirror as components of the reflecting surface. It is like that.

That is, the present invention comprises a light source, a reflecting mirror for reflecting light from the light source forward, and a diffusion lens provided in front of the reflecting mirror. In the lamp, the reflecting surface of the reflecting mirror comprises a plurality of reflecting surface elements radially divided around the optical axis of the reflecting mirror, and each of the reflecting surface elements transmits light from the light source to the light source. It is configured to diffusely reflect in the circumferential direction with respect to the optical axis, and the diffusion lens includes a plurality of lens elements that are concentrically divided around the optical axis. .

[0008] The "plurality of reflective surface elements" may be formed over the entire reflective surface, or may be formed only in a partial region thereof.

[0009]

As described above, in the present invention, the reflecting surface of the reflecting mirror is provided with a plurality of reflecting surface elements radially divided around the optical axis of the reflecting mirror. Therefore, a reflected light group of a radial pattern having the reflected light from each of these reflecting surface elements as one unit is obtained, and each of the reflecting surface elements diffusely reflects light from the light source in the circumferential direction with respect to the optical axis. Therefore, when the lens is removed, the reflecting surface element appears to shine radially with respect to the optical axis. When the reflected light group radiating in this way enters the diffusion lens, the lamp shines in a discrete pattern while maintaining the radial regularity. For this reason, when the lighting device at the time of lighting is observed from the outside, it is possible to make the lighting device look shining in a novel way that the conventional lighting device does not have. Moreover, in the present invention, if the diffusing lens includes a plurality of lens elements that are concentrically divided about the optical axis, the following operation and effect can be obtained. That is, as described above, a regular reflection light group of a radial pattern having the reflection light from each reflection surface element as one unit is incident on the diffusion lens, and this is further concentric regularity by the diffusion lens. By letting it diffuse and transmit,
It is possible to illuminate the lamp in a scattered manner (for example, like a pattern of a chrysanthemum flower or a fireworks display) while maintaining radial and concentric regularity.

As described above, according to the present invention, it is possible to obtain a lamp excellent in appearance at the time of lighting.

Further, by adopting the configuration of the present invention, even when the light is not lit, when the reflection surface is observed through the diffusion lens, the reflection surface having a radial regularity has a distance toward the back of the diffusion lens. Since the lighting is visible, the lighting fixture can exhibit an ordered depth feeling.

As a specific configuration example of the reflecting surface element for diffusing and reflecting the light from the light source in the circumferential direction as described above, as described in claim 2, the reflecting surface element is provided on a predetermined reference curved surface. The method of allocating a curved surface having a different curvature in the circumferential direction (including a curved surface having a zero curvature in the circumferential direction) can be adopted.

In this case, if the reference curved surface is constituted by a paraboloid of revolution having the optical axis as a central axis, all the reflecting surface elements can be seen in the lamp front view. It can be made to look like a streak over the entire length in the radial direction. Such a configuration is particularly effective in a lamp, such as a vehicle marker lamp, where importance is placed on how to shine in the front direction of the lamp.

According to a fourth aspect of the present invention, when the sectional shape in the circumferential direction of each of the reflection surface elements is set to a convex arc shape, the processing of the mold for forming the reflector can be performed by an end mill or the like. Can be easily performed.

[0015]

[0016]

The present invention is applicable to vehicle lamps, general lighting lamps used indoors and outdoors, guide display lamps, display lighting lamps, portable lamps, and other lamps used for various purposes. This is particularly effective when applied to a vehicle marker light in which the appearance of the lamp itself during lighting is extremely important.

[0018]

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.

A lamp 10 according to the present embodiment is a vehicular marker lamp, and is provided with a light source 12, a reflector 14 for reflecting light from the light source 12 forward, and a reflector 14 in front of the reflector 14. It has a diffusion lens 16, and has a circular outer shape when viewed from the front of the lamp.

As shown in FIG. 3, the reflecting surface 18 of the reflecting mirror 14 is placed on a reference curved surface 18o constituted by a paraboloid of revolution centered on the optical axis Ax of the reflecting mirror 14, as shown in FIG. A plurality of fan-shaped reflecting surface elements 18s radially divided at equal pitches from the center are allocated.

The light source 12 is a bulb having a C-6 type filament 12a. The filament 12a is located at the focal point F of the reference curved surface 18o, and the rear top portion of the reflecting mirror 14 is connected via the socket 20. Attached to.

As shown in FIG. 5 (a), each of the reflection surface elements 18s has a circular cross section in the circumferential direction, so that the light from the light source 12 is moved with respect to the optical axis Ax. The light is diffusely reflected in the circumferential direction.

As shown in FIG. 4, the diffusion lens 16 includes a plurality of lens elements 16s which are concentrically divided at equal pitches around the optical axis Ax. As shown in FIG. 1, each of these lens elements 16 s has a radial cross-sectional shape set to a convex arc shape, so that light reflected from the reflecting surface 18 is diffusely transmitted in the radial direction with respect to the optical axis Ax. It has become.

Next, the operation of the present embodiment will be described.

When parallel light is incident on the diffusion lens 16 from behind, when the parallel light is observed from the front front, the diffusion lens 16 is concentrically formed at an equal pitch as shown in FIG. Looks shiny. This is because the parallel light is diffused in the radial direction by the lens action of each of the plurality of lens elements 16s.

On the other hand, light incident on the reflecting surface 18 from the light source 12 (more precisely, from the filament 12a) is diffused in the circumferential direction by each of the plurality of reflecting surface elements 18s formed on the reflecting surface 18. When the reflection surface 18 is observed from the front front, the ridge lines of the plurality of reflection surface elements 18s appear to shine in a streak shape. Then, as a whole, the reflection surface 18 appears to radiate at an equal pitch as shown in FIG. 6B. At that time, the reflection surface 18
Is constituted by a paraboloid of revolution having the optical axis Ax as the central axis, so that each reflecting surface element 18s appears to shine in a streak shape over the entire length in the radial direction.

Therefore, when the diffusing lens 16 is arranged in front of the reflecting mirror 14, the radial reflected light pattern shown in FIG. 6B is dispersed in the radial direction by the diffusing lens 16, so that the lamp 10 is moved from the front to the front. When observed, FIG.
As shown in (c), it shines in a scattered pattern at regular intervals in both the circumferential direction and the radial direction.

When the lamp 10 is observed obliquely from the front, the positional relationship between the diffusion lens 16 and the reflection surface 18 is shifted, but the lens elements 16s and the reflection surface elements 18s have a light diffusion function. 6A and FIG. 6B, the diffusion lens 16 and the reflecting mirror 14 shown in FIG.
Is slightly deformed as compared with the pattern observed when viewed from the front front, so that the lamp 10 shines in a pattern close to the scattered pattern shown in FIG. Become.

As described in detail above, in the present embodiment, the reflecting surface 18 of the reflecting mirror 14 is
Since a plurality of reflecting surface elements 18s radially divided around x are provided, each of these reflecting surface elements 1s is provided.
A reflected light group having a radial pattern with the reflected light from 8s as one unit can be obtained, and the reflected light group having such regularity is diffused with a plurality of lens elements 16s concentrically divided. When the light 10 is incident on the lens 16, the lamp 10 can be illuminated in a discrete pattern while maintaining the above-mentioned radial and concentric regularity. It can be made to look shining in a novel way of lighting that is not found in lamps.

As described above, according to the present embodiment, it is possible to obtain a lamp with an excellent appearance when lit.

Further, by adopting the configuration of the present embodiment, even when the light is not lit, when the reflection surface 18 is observed through the diffusion lens 16 as shown in FIG. Since the surface 18 can be seen at a distance toward the back of the diffusion lens 16 having concentric regularity, the lamp 10 can exhibit an ordered depth feeling.

In the above embodiment, the reflection surface element 18
Although both the s and the lens element 16s have been described as being formed at the same pitch, it is a matter of course that the pitches may be changed, and in such a case, compared to the above embodiment, It is possible to obtain a lighting fixture that has an accent on the pattern.

In the above embodiment, the reflecting surface element 18 whose circumferential cross section is set to a convex arc shape is used.
Although s has been described, a reflective surface element 18sA having a concave arc shape as shown in FIG. 5B or a reflective surface element 18sB having a corrugated cross section as shown in FIG. 5C may be employed. Also in this case, since the light from the light source 12 can be diffusely reflected in the circumferential direction, it is possible to obtain a luminous lamp similar to the above embodiment. On the other hand, instead of the reflective surface element 18s having such a diffuse reflection function,
Reflection surface elements 18sC and 18 for deflecting and reflecting light from the light source 12 in the circumferential direction as shown in FIGS. 5D and 5E.
A reflective surface element 18sE that deflects and reflects the light from the light source 12 in the radial direction as shown in FIG. 5F or sD may be employed. In these cases, the light is different from the above embodiment. You can get the lamp.

The lens element 16s of the diffusion lens 16 is also a modified example of the reflecting surface element shown in FIG. 5 instead of the convex arcuate cross section as in the above embodiment.
(B), a concave arc shape, a corrugated cross-sectional shape, or the like as shown in FIG. 5 (c). In these cases, the reflected light can be diffused and transmitted in the radial direction. It is possible to obtain a lighting device having a similar light emission.

Further, instead of the diffusion lens 16 divided concentrically as in the above embodiment, the diffusion lens 16A divided radially as shown in FIG. 7 or FIG.
As shown in FIG. 10, a diffusion lens 16B divided concentrically and radially, and a diffusion lens 6 divided into a lattice shape as shown in FIG. 10 as a conventional example may be employed. Thus, it is possible to obtain a lighting device having a different lighting style from the above-described embodiment. Note that the lens element 1
When 6 s is radially divided, the center becomes one point (point on the optical axis Ax) and the lens element 16 s
Since it is difficult to form the lens in the mold processing, a small circular area 16a formed in a fisheye lens shape is set at the center of the diffusion lenses 16A and 16B.

The present invention of course can be applied to a lamp having an outer shape different from the circular lamp as in the above embodiment. FIG. 9 shows a rectangular lamp 10A.
It shows an example of application to the present invention. In this example, the same reflective surface element 18s as in the above embodiment is employed, but the lens element 16s is adapted to the shape of the lamp 10A.
The one divided into concentric rectangular shapes around the optical axis Ax is adopted. Also in this case, the lighting method of the lamp is similar to that of the above-described embodiment. However, due to the difference between the circular shape and the rectangular shape, it is possible to obtain a lighting device with a different lighting style from the above-described embodiment.

[Brief description of the 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 diffusion lens removed.
III direction view

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

FIG. 5 shows a cross-sectional shape of the reflecting surface element of the lamp.
(A), and similar views (b to f) showing modifications thereof.

FIG. 6 is a view showing the operation of the embodiment.

FIG. 7 is a view similar to FIG. 4, showing a modification of the diffusion lens of the embodiment.

FIG. 8 is a view similar to FIG. 4, showing another modified example of the diffusion lens of the embodiment.

FIG. 9 is a view similar to FIG. 2, showing a modification of the embodiment.

FIG. 10 shows a conventional example.

[Explanation of symbols]

10, 10A lamp 12 light source (bulb) 12a filament 14 reflecting mirror 16, 16A, 16B lens 16s lens element 18 reflecting surface 18o reference curved surface (rotating paraboloid) 18s, 18sA, 18sB, 18sC, 18sD, 1,
8sE Reflective surface element Ax Optical axis

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F21S 8/10 F21W 101: 14 F21Y 101: 00

Claims (4)

(57) [Claims] 1. A lamp comprising a light source, a reflecting mirror for reflecting light from the light source forward, and a diffusion lens provided in front of the reflecting mirror, wherein the reflecting surface of the reflecting mirror is A plurality of reflecting surface elements radially divided around the optical axis of the reflecting mirror, wherein each of the reflecting surface elements is configured to diffusely reflect light from the light source in the circumferential direction with respect to the optical axis. A lamp, wherein the diffusion lens includes a plurality of lens elements concentrically divided about the optical axis. 2. The device according to claim 1, wherein each of the reflecting surface elements is configured by allocating a curved surface having a different curvature in the circumferential direction from the reference curved surface on a predetermined reference curved surface. Lights. 3. The lamp according to claim 2, wherein the reference curved surface is constituted by a paraboloid of revolution having the optical axis as a central axis. 4. The lamp according to claim 2, wherein the cross-sectional shape of each of the reflection surface elements in the circumferential direction is set to a convex arc shape.