JP2007299599A - Ring lamp - Google Patents

Abstract

In a conventional ring lamp, a core that is a transparent material having a high refractive index is covered with a clad that is a transparent material having a low refractive index to form a light emitting portion, and a reflective layer is formed between the core and the cladding. Therefore, the formation of the light emitting portion is very time-consuming and expensive.
According to the present invention, a plurality of LEDs 4 are arranged radially at the center of a light guide lens 2 formed as a ring-shaped plate, and the light guide arm 5 is integrated with the light guide lens from the optical axis direction of each LED. The reflection part 2a that reflects light from the LED propagating through the light guide arm in the circumferential direction on which the light guide lens is formed is provided at the intersection of the light guide lens and the light guide arm. The ring-shaped lamp 1 having the structure as described above is used as a base, and by combining with a multilayer structure or a reflector 10 or the like, various ring-shaped lamps can be formed at low cost and the problem is solved.
[Selection] Figure 1

Description

  The present invention relates to a configuration of a lamp that emits light in a ring shape.For example, the lamp is provided at the periphery of an illumination lamp such as a headlight to further improve a decorative effect such as a vehicle and improve the commercial value. It is used when used when producing.

  A conventional ring-shaped lamp 90 of this type is generally formed in a shape as shown in FIGS. 9 and 10, and a part of the light-emitting portion 91 in which a round bar is formed in a ring shape. Is provided with at least one substantially V-shaped notch 92 along the radial direction of the light emitting portion 91, and an LED lamp 93 is opposed to the notched portion 92 so that light is introduced into the light emitting portion 91. It is comprised so that.

  Here, FIGS. 11 and 12 are cross-sectional views of the light-emitting portion 91, and the round bar itself forming the light-emitting portion 91 has a multi-layer structure. First, the central portion of the light-emitting portion 91 is shown in FIG. The core 91a is formed of a resin having a relatively high refractive index, such as an acrylic resin or a polycarbonate resin, and the outer periphery thereof is coated (clad) with a resin having a relatively low refractive index, such as polyethylene or polypropylene. 91b is formed.

In addition, a reflection layer 91c is formed between the core 91a on the side where the notch 92 is provided and the coating 91b so as to emit the light circulating in the light emitting portion 91 to the outside. As shown in FIG. 12, 91 c is formed so as to have a wider width at a location farther from the LED lamp 93, and is designed so that light with uniform brightness is emitted from the entire surface of the light emitting unit 91.
JP 2003-297107 A

  However, in the above-described ring-shaped lamp 90 having the conventional configuration, forming the light emitting portion 91 in a round bar shape, that is, forming the core 91a portion easily causes problems such as sink marks. In addition, it is more difficult to form the coating (clad) 91b and the reflective layer 91c that cover the core 91a.

  Therefore, the light emitting unit 91 is likely to be low in productivity and high in cost, and the ring lamp 90 itself is high in cost, such as a decorative part for a vehicle that is inexpensive and requires mass production. As a result, problems that are not suitable for the purpose of using the

  Further, when the light emitting portion 91 is formed in a ring shape of a round bar as described above, all the light emitted to the outside passes through a substantially semicircular lens-shaped portion and is diffused over a wide range. As a result, it was not possible to obtain the expected brightness, and when this brightness was sufficient, a large number of LED lamps had to be used, and the configuration was complicated. .

  In the present invention, as specific means for solving the above-described conventional problems, a plurality of LEDs are arranged radially in the center of a light guide lens formed as a ring-shaped plate, and the optical axis direction of each of the LEDs From the LED to the light guide lens, a light guide arm is integrated and installed, and light from the LED propagating through the light guide arm is guided to the intersection of the light guide lens and the light guide arm. By providing a ring-shaped lamp that is provided with a reflecting portion that reflects in the circumferential direction on which the lens is formed, the configuration and assembly work can be simplified, and the cost can be reduced to solve the problem. It is.

  According to the present invention, a plate-like ring is used, a chip-like LED is arranged at the center of this ring, and the light from the LED does not cause much loss by being directly connected by a ring with a light guide arm radially. And when it is emitted from the ring to the outside, it is emitted from the plane and is not subject to extreme diffusion, and thus a bright ring-shaped lamp can be obtained even with a small number of LEDs. The effect is obtained.

  Below, this invention is demonstrated in detail based on embodiment shown in a figure. 1 is a first embodiment of a ring-shaped lamp according to the present invention. In the present invention, the light guide lens 2 which is a ring portion of the ring-shaped lamp 1 is basically plate-shaped. It is formed as a shape.

  Then, a polygonal substrate, for example, a polygonal substrate 3 such as a quadrangle, a pentagon, or a hexagon, is installed at a substantially central position with respect to the light guide lens 2. An LED chip 4 as a light source is attached to each of the sides 3a that are polygonal. At this time, the substrate 3 is formed of an appropriate insulator such as ceramics or glass epoxy resin, and a wiring pattern (not shown) is formed so that power can be supplied to each LED chip 4. The LED chip 4 attached to the side 3a of the substrate 3 is configured to be freely turned on and off. Further, wiring may be performed using a flexible printed circuit board for the substrate 3, or a metal substrate such as aluminum may be used instead of the substrate.

  At this time, the substrate 3 and the LED chip 4 are molded with, for example, a transparent epoxy resin in order to protect the LED chip 4 from the external environment such as humidity, and can keep airtight against the outside air. It is configured.

  In addition, in the present invention, the light guide arm 5 is provided corresponding to each LED chip 4, and the light emitted from each LED chip 4 is provided corresponding to each. The light guide arm 5 is introduced into the light guide arm 5 from one end portion 5a and guided.

  Since the other end 5b of the light guide arm 5 is connected to the inner diameter of the light guide lens 2, the light emitted from the LED chip 4 is transmitted into the light guide lens 2. Will be introduced. At this time, the other end portion 5b of the light guide arm 5 and the light guide lens 2 are connected at an angle close to a right angle. There is a high possibility that the light from the LED chip 4 goes straight without being reflected and is emitted from the outer diameter side of the light guide lens 2 to the outside.

  Therefore, as shown in FIG. 1, the light beam from the light guide arm 5 is reflected on the outer diameter side of the light guide lens 2 at a position connected to the light guide arm 5 as an angle at which total internal reflection is performed. A substantially V-shaped reflecting portion 2 a is formed so as to be in contact with the reflecting portion 2 a, and light is reflected by the reflecting portion 2 a so as to be confined in the light guide lens 2. Therefore, the light from the LED chip 5 is present in the light guide lens 2.

  Here, if the surfaces of the light guide lens 2, the reflecting portion 2 a, and the light guide arm 5 that are in contact with the outside air are smooth surfaces, the light once confined in the inner surface is higher than the light guide lens 2 described above. Internal reflection is repeated in the refractive member, and no light is emitted to the surface. That is, it does not achieve the purpose as a lamp.

  Therefore, in the present invention, as shown in FIG. 2, if a lens cut 2 c having an appropriate shape is provided on a surface (hereinafter referred to as a back surface) facing the viewing surface 2 b of the light guide lens 2, the viewing is performed. The surface 2b can emit light. The above is the same for the light guide arm 5, and if the lens cut 5 d is provided on the surface (rear surface) facing the viewing surface 5 c of the light guide arm 5, the light guide arm 5 also emits light. It can be used as a part and can change the overall design.

  At this time, if the lens cut 2c is applied to the back surface 2d corresponding to the place where the viewing surface 2b of the light guide lens 2 is desired to shine, a desired portion of the light guide lens 2 is illuminated. It is also possible to make the light guide lens 2 shine as a broken arc. This can be carried out for the light guide arm 5 in exactly the same manner.

  In the present invention, it is possible to process the viewing surface 2b of the light guide lens 2 or the viewing surface 5c side of the light guide arm 5 to improve the appearance. If the surface 2b, 5c corresponding to the lens cuts 2c, 5d on the back surface 2d of the optical lens 2 or the back surface 5e of the light guide arm 5 is subjected to fine uneven processing such as matte processing, it is emitted to the outside The light becomes even more uniform and the quality and aesthetics can be improved.

  3 and 4 show a second embodiment, and the present invention may have only one light guide arm 5 as in the first embodiment described above. There may be more than one.

  In the case of this second embodiment, there is one light guide lens 2 as in the previous embodiment, and for example, a light guide arm 51 having four LED chips 4 is provided for this light guide lens 2. In addition, the light guide arm 52 having four LED chips 4 is also provided below the light guide lens 2 in the same manner. The light arm 51 and the light guide arm 52 are arranged so as to divide the inner periphery of the light guide lens 2 at an equal angle.

  The LED chip 4 is opposed to one end portion 52a of the light guide arm 52 disposed below, and the bent reflection portion 6 is provided on the other end portion 52b side. The light from 52 is bent upward at a substantially right angle and connected to the light guide lens 2. Therefore, light from the light guide arm 51 is introduced into the light guide lens 2 at four locations on the inner diameter side, and light from the light guide arm 52 is introduced into four locations on the back side.

  Incidentally, a reflecting portion 2a is provided on the outer diameter side of the light guide lens 2 to which the light guide arm 51 is connected. Similarly, a lens cut 2c is applied to a necessary portion of the back surface 2d of the light guide lens 2. This is the same as the first embodiment in that a satin finish or the like is applied to the viewing surface 2b as necessary.

  5 and 6 show a third embodiment of the present invention. In this third embodiment as well, as shown in FIG. 5, the configuration of the light guide lens 2 and the light guide arm 5 is shown. Are substantially the same, and the shape when viewed from the front is also substantially the same. However, the ring-shaped lamp 1 is viewed from the front and below the light guide lens 2 and the light guide arm 5 (FIG. 6). The second substrate 8 on which the LED chip 4 is mounted is installed in parallel with the light guide lens 2 and the light guide arm 5.

  At this time, a plurality of LED chips 4 are mounted on the second substrate 8, and these LED chips 4 surround the light emitting direction and the installation position with the light guide lens 2 and the light guide arm 5. Therefore, when the ring-shaped lamp 1 of the third embodiment is viewed from the front, the light from the LED chip 4 installed on the second substrate 8 is The light guide lens 2 and the light guide arm 5 are not obstructed.

  In addition, between the light guide lens 2 and the second substrate 8, a lens cut 9 a corresponding to the LED chip 4 installed on the second substrate 8, for example, a convex lens shape focused on the LED chip 4. The inner lens 9 with the cuts is attached.

  With the above configuration, the ring-shaped lamp 1 of the third embodiment looks like the shape shown in FIG. 5 when viewed from the front, and at the time of lighting, the light guide lens 2 and the light guide arm 5 are Indirect light shining in a uniform and relatively dark state by the lens cuts 2c and 5d applied to the back surface thereof and direct irradiation from the LED chip 4 directed in the irradiation direction on the second substrate 8 Combined with optical light, a novel lighting effect can be obtained.

  FIG. 7 and FIG. 8 show a fourth embodiment of the present invention. This fourth embodiment has the light guide lens 2 configured substantially the same as that described in the previous embodiments, and The substrate 3 is extended below the light guide arm 5, and an arbitrary number, for example, four LED chips 41 are preferably attached to be inclined so as to emit light downward at an appropriate angle.

  In a range where the light from the LED chip 41 is radiated, a reflector formed by a paraboloidal system such as a rotating paraboloid having a rotation center around the vertical line X passing through the center of the light guide lens 2. 10 is attached to reflect the light from the LED chip 41 in the vertical X direction.

  At this time, when the ring lamp 1 is intended to be used for a vehicle, the vertical line X is mounted horizontally when being mounted on the vehicle, and at the time of mounting, It is only necessary that the right and left sides can be specified so that the reflector 10 can obtain a prescribed light distribution characteristic.

  With the above configuration, the ring lamp 1 of the present invention can be used for household use by changing the output of the LED chip 4, stacking a plurality of stages, and changing the configuration of each stage when stacked. It can be used for various purposes such as for amusement parks, game machines, and vehicles, and can be a versatile lighting fixture.

1 is a front view showing a first embodiment of a ring lamp 1 according to the present invention. It is sectional drawing which follows the AA line of FIG. It is a front view which shows the 2nd Example of the ring-shaped lamp 1 which concerns on this invention. It is sectional drawing which follows the BB line of FIG. It is a front view which shows the 3rd Example of the ring-shaped lamp 1 which concerns on this invention. It is sectional drawing which follows the CC line of FIG. It is a front view which shows the 4th Example of the ring-shaped lamp 1 which concerns on this invention. It is sectional drawing which follows the DD line | wire of FIG. It is a perspective view which shows a prior art example. It is sectional drawing which follows the EE line | wire of FIG. It is sectional drawing which follows the FF line | wire of FIG. It is sectional drawing which follows the GG line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Ring-shaped lamp 2 ... Light guide lens 2a ... Reflection part 2b ... Viewing surface 2c ... Lens cut 2d ... Back surface 3 ... Substrate 3a ... Side 4, 41 ... LED chip 5, 51, 52 ... Light guide arm 5a ... One side End 5b ... the other end 5c ... viewing surface 5d ... lens cut 5e ... rear face 6 ... bending reflection part 7 ... gap part 8 ... second substrate 9 ... inner lens 9a ... lens cut 10 ... reflector

Claims (4)

  A plurality of LEDs are arranged radially at the center of a light guide lens formed as a ring-shaped plate, and a light guide arm is integrated and installed from the direction of the optical axis of each LED to the light guide lens. The intersection of the lens and the light guide arm is provided with a reflecting portion that reflects light from the LED propagating through the light guide arm in the circumferential direction where the light guide lens is formed. Characteristic ring lamp.   The ring lamp according to claim 1, wherein the LED and the light guide arm are provided with a plurality of stages so that the centers of the light guide lenses coincide with each other.   Irradiation directions are positioned behind the light guide lens and the light guide arm arranged in substantially the same plane so as to be located in respective gaps surrounded by the light guide lens and the light guide arm in a front view state. 2. A ring lamp according to claim 1, wherein a decorative lamp made of a front LED and an inner lens is arranged.   The ring-shaped lamp according to claim 1, wherein a lamp having a light distribution characteristic is combined with a rear surface of the ring-shaped lamp constituted by the light guide lens, the LED, and the light guide arm.

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