JP3152234U - LED bulb and its lamp cover - Google Patents

Abstract

An LED bulb for uniformly diffusing light rays and fusing them together is provided. A lamp cover (20) uses light guide as a main technical means, uniformly diffuses light beams emitted from a plurality of LED elements (11) in an LED bulb and fuses them together, and exhibits a good irradiation effect. A light guide column 22 is installed inside the light transmissive case 21 of the lamp cover so as to face each LED element, the outer diameter of the root portion of the light guide column at a position close to the light transmissive case is increased, and the LED is extended from the root portion. The closer to the element, the outer diameter gradually decreases, exhibiting a cone shape, and the light rays generated by each LED element are uniformly diffused by the corresponding light guide pillars to reach the translucent case and emitted to the outside. [Selection] Figure 3

Description

  The present invention relates to a structure technology of a bulb, and more particularly to an LED bulb using a plurality of LED elements as a light source and a lamp cover thereof.

  In recent years, since LEDs have advantages such as power saving and longer service life than other light emitters, they have been increasingly used in lighting fixtures. However, since the illuminance of the LED element is limited to technical difficulties in powering up, the number of LED elements used must be increased in order to increase the luminance of the lighting fixture. The difference between LED elements and traditional illuminants is the characteristic that the generated light rays are concentrated at a specific area angle. When multiple LED elements are attached to the same lighting fixture, the problem of multiple rays and multi-bright spots occurs. Can do. Multiple rays and bright spots are unevenly irradiated, and it is easy to form multiple shadows on the irradiated object, causing flickering to the viewer and damaging visual acuity.

  FIG.1 and FIG.2 is a lighting fixture display figure (1) and (2) which provided the some well-known LED element. In general, as shown in FIG. 1, a technical means for improving a defect that occurs when a plurality of LED elements 90 are irradiated with multiple light beams is provided with a slight refraction pattern 92 on a lamp cover 91 so that the light beams generated by the LED elements 90 are emitted. It is diffused by the refractive action of the refractive pattern 92. Further, as shown in FIG. 2, the light generated by each LED element 90 can be diffused and irradiated in a relatively soft manner by the frost processing method for the lamp cover 91.

  The improvement effect that the light diffusion means in the above-mentioned prior art manifests is not ideal as expected, and there are problems such as multiple rays, multiple bright spots, uneven illumination, multiple shadows of the irradiated object, etc. Is still not effectively suppressed. As a result of the research conducted by the present inventors, the main reason why the improvement effect of the known technology is not expected is that the inside of the lamp cover when a plurality of LED elements emit light, First, light spots and flares where light rays are concentrated are projected, and a dark area with insufficient light illuminance is formed between the light spots. After these light spots are generated, a refraction pattern or frost placed on the lamp cover is generated. The diffusion effect generated by the treatment is quite limited.

  In view of this, the present invention provides an LED bulb and a lamp cover for the bulb that use a plurality of LED elements, and finally effectively improves the drawbacks of multiple light irradiation.

  The main object of the present invention is to uniformly diffuse and fuse the light rays emitted from a plurality of LED elements in an LED bulb.

  For the above purpose, the LED bulb provided by the present invention includes a lamp head and a lamp cover attached to the lamp head, and a plurality of LED elements are provided at connection ends corresponding to the lamp cover of the lamp head. A circuit device is provided in the head for driving each LED element to generate light, and a connector for electrically connecting the circuit device and an external bulb socket is provided at the end of the lamp head.

  The lamp cover includes a translucent case attached to a lamp head including a plurality of LED elements, and a light guide column is provided on the inner side of the translucent case so as to face each LED element. The outer diameter at the position close to the translucent case is large, and at least one side is connected to the root portion of the adjacent light guide column, and each light guide column is stretched while the outer diameter is gradually reduced from the root portion to a position closer to the LED element to form a cone In addition, a fitting groove for fitting the light generating end of the LED element is provided at the end of the light guide column, and the light generated by each LED element is uniformly diffused through the corresponding light guiding column to reach the light transmitting case. Radiated to the outside.

  The light guide column installation means may be integrally injection molded with the translucent case, or each light guide column is first integrally molded and a recess is formed at a position corresponding to each light guide column on the back of the light guide assembly. The light guide assembly is combined with the inner side of the translucent case, and any of various technical means for installing the light guide column generates an effect of conducting the light beam.

  When each light guide column and the translucent case are integrally injection-molded, a small number of enlarged diameter convex portions or light guides for assisting light beam conduction are provided at the root position of each light guide column, and the light beam is diffused more uniformly.

  Compared with the prior art, the LED bulb of the present invention and its lamp cover are refracted and totally reflected by the light guide column before the light generated by the plurality of LED elements enters the translucent case, and uniformly diffused. It is introduced into the inner surface of the translucent case and does not form concentrated light spots and flares on the inner surface of the translucent case (lamp cover), thereby producing a good illumination effect.

It is a lighting fixture display figure (1) provided with the well-known several LED element. It is a lighting fixture display figure (2) provided with the well-known several LED element. It is local sectional drawing of 1st Example of this invention. It is a three-dimensional exploded view of the first embodiment of the present invention. It is a three-dimensional view of the lamp cover inside of the second embodiment of the present invention. It is a three-dimensional exploded view of the second embodiment of the present invention. It is local sectional drawing of 2nd Example of this invention. It is a three-dimensional exploded view of the third embodiment of the present invention. It is local sectional drawing of 3rd Example of this invention. It is a lamp cover inner surface display figure of 4th Example of this invention. It is a lamp cover inner surface display figure of 5th Example of this invention. It is a front view external view of 6th Example of this invention.

  3 and 4 are a local sectional view and a three-dimensional exploded view of the first embodiment of the present invention. The LED bulb of the first embodiment includes a lamp head 10 and a lamp cover 20 attached to the lamp head 10.

  A plurality of LED elements 11 are installed at a connection end corresponding to the lamp cover 20 of the lamp head 10, and a circuit device 12 that drives each LED element 11 to generate a light beam is provided in the lamp head 10. A radiating fin set 13 is provided at the bottom end of the circuit device 12, and a connector 14 for electrically connecting the circuit device 12 and an external bulb socket is provided at the end of the lamp head 10. A heat radiating hole 15 is provided.

  A light guide column 22 is extended and installed integrally with the light transmissive case 21 at a position corresponding to each LED element 11 inside the light transmissive case 21 of the lamp cover 20, and the light transmissive case 21 at the root of the light guide column 22 is attached to the light transmissive case 21. The outer diameter of the near position is large, and at least one side is connected to the root portion of the adjacent light guide column 22, and each light guide column is extended from the root portion to the end portion while gradually decreasing the outer diameter to exhibit a substantially cone shape (for example, a cone) The shape is a polygonal pyramid, and the conical shape is described as a representative in the figure). The translucent case 21 of this embodiment has an arc shape, and the plurality of light guide columns 22 and the translucent case 21 are integrally formed, and some of the light guide columns 22 are arranged in an annular shape, and are arranged in the above-described annular shape. The connection position between the outer periphery of the light guide column 22 and the translucent case 21 is inclined to form a light guide 23, and the corresponding light guide column in a situation where the light intensity generated by each LED element 11 is not attenuated. The light is uniformly diffused through 22, introduced into the translucent case 21, and emitted to the outside, thus achieving the effect of uniform dispersion of light rays.

  5 to 7 show a second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that the adjacent light guide columns 22 are not directly connected to each other, and are extended to the connection position between the root of each light guide column 22 and the translucent case 21 in four directions. The diameter-expanded convex part 24 is provided, and at least one side of the diameter-expanded convex part 24 is extended to provide an arc-shaped light guide 23, and the arc-shaped light guide 23 is adjacent to the light guide column. 22 is connected to the enlarged-diameter convex portion 24.

  When the above-described translucent case 21 is implemented, the translucent mode includes a transparent material, a translucent material, or a transparent material that has been subjected to a frost treatment on the surface. An engagement flange 25 is provided on the front side. The lamp head 10 is provided with an engagement groove 16 corresponding to the engagement flange 25 to be used for locking the translucent case 21, and the engagement flange 25 is provided with at least one notch 26. 10 is provided with a stopper 17 for preventing the rotation of the lamp cover 20 relative to the lamp head 10 corresponding to the notch 26, whereby the lamp head 10 and the lamp cover 20 are assembled quickly.

  In addition, a fitting groove 27 for fitting the light generating end of the LED element 11 is provided at the end of the light guide column 22, and an arc convex surface 28 corresponding to the light generating end of the LED element 11 is provided in the fitting groove 27. The arc-shaped convex surface 28 is formed of a lens that is integrally formed in the fitting groove 27 or inserted into the groove bottom of the fitting groove 27.

  In this embodiment, the plurality of light guide columns 22 are arranged in a radial pattern, and one of the light guide columns 22 is located at the center of the inner surface of the translucent case 21, and the other light guide columns 22 surround the light guide columns 22 at the center position. Are arranged as follows.

  When each LED element 11 generates a light beam, the light beam is refracted by the arc convex surface 28 to form a diffused light beam, and the light beam is directly incident on the light guide column 22, and the light beam is reflected by the principle of total reflection and refraction of the light beam. After being uniformly diffused through the light guide column 22, the diameter-expanded convex portion 24, and the arc-shaped light guide 23 and introduced into the translucent case 21, it is emitted to the outside. Thus, the light rays generated by the LED elements 11 are already uniformly diffused before entering the translucent case 21.

  8 and 9 show a third embodiment of the present invention. The difference between this embodiment and the first embodiment is that the light guide assembly 30 is attached to the inner side of the translucent case 21 after the plurality of light guide pillars 22 are integrally injection-molded to form the light guide assembly 30. is there. The concave portion 29 is formed at a position corresponding to each light guide column 22 on the back portion of the light guide assembly 30, and each light guide column 22 is hollow, so that the light intensity generated by each LED element 11 is not attenuated. Thus, the light is uniformly diffused through the corresponding light guide column 22, introduced into the translucent case 21, and further emitted to the outside. Thus, the effect of uniformly dispersing the light beam is achieved. The shaping of the translucent case 21 of the lamp cover 20 and the arrangement method of the light guide columns 22 in the first, second, and third embodiments described above are explained by the translucent case 21 having a circular arc shape and the light guide columns 22 having a radial arrangement. However, at the time of actual implementation, the shaping mode of the translucent case 21 and the arrangement method of the light guide columns 22 can be changed as necessary.

  For example, as shown in the lamp cover inner surface display diagram of the fourth embodiment of the present invention in FIG. 10, the translucent case 21 of the lamp cover of this embodiment has a substantially rectangular shape, and the light guide column 22 has a rectangular array system. It is arranged. Further, as shown in the lamp cover inner surface display diagram of the fifth embodiment of the present invention in FIG. 11, the translucent case 21 of the lamp cover of this embodiment is in a substantially arc-like long state, and the light guide column 22. Are arranged in an elongated manner. In addition, in this embodiment, a heat-dissipating sheet drawn with a dotted line in the drawing and a conductive terminal are combined to form a fluorescent lamp tube.

  FIG. 12 is a front view of the sixth embodiment of the present invention. The fifth embodiment is different from the first embodiment in that the lamp head 10 has a relatively long working length, the LED bulb is mounted in a mounting environment having a relatively deep depth, and the connector 14 employed is the above-described one. Unlike what is generally found, the connector 14 is a plug-in connector 14 and is fitted and joined to a socket-type external lamp sheet.

  In summary, the LED bulb of each embodiment of the present invention has a light guide column, a diameter-expanded convex portion, a refraction of an arc-convex light guide, before allowing light beams generated by a plurality of LED elements to enter the translucent case. It is diffused uniformly by the total reflection action and introduced into the inner surface of the translucent case, and a relatively good lighting effect appears.

DESCRIPTION OF SYMBOLS 10 Lamp head 11 LED element 12 Circuit device 13 Radiation fin set 14 Connector 15 Radiation drilling hole 16 Engagement groove 17 Stopper 20 Lamp cover 21 Translucent case 22 Light guide pillar 23 Light guide 24 Expanded convex part 25 Engagement flange 26 Notch 27 Fitting groove 28 Arc convex surface 29 Recess 30 Light guide assembly 90 LED element 91 Lamp cover 92 Refraction pattern

Claims (23)

  In the lamp cover, the lamp cover includes a light-transmitting case attached to a lamp head including a plurality of LED elements, and a light guide column facing each LED element is provided inside the light-transmitting case. The root portion has a large outer diameter at a position close to the translucent case, and at least one side is connected to the root portion of the adjacent light guide column, and each light guide column is extended while gradually decreasing the outer diameter to a position closer to the LED element than the root portion. The lamp cover has a cone shape, and the light generated by the LED element is uniformly diffused through a corresponding light guide column, introduced into a translucent case, and radiated to the outside.   2. The lamp cover according to claim 1, wherein the translucent case has an arc shape, a plurality of light guide columns are formed integrally with the translucent case, and the light guide columns are arranged in an annular shape. , Lamp cover.   3. The lamp cover according to claim 2, wherein a light guide is formed by tilting and extending a connection position of the outer periphery of the root portion of the plurality of light guide columns arranged in an annular shape with the translucent case. cover.   3. The lamp cover according to claim 2, wherein an enlarged-diameter convex portion diffusing toward the four circumferences is provided at a connection position between the root portion of each light guide column and the translucent case, and at least one side of the enlarged-diameter convex portion is extended to form an arc. A lamp cover, characterized in that a convex light guide is formed and a diameter-expanded convex part of a light guide column adjacent to the arc-shaped light guide is connected.   2. The lamp cover according to claim 1, wherein a fitting groove for fitting a light generation end of the LED element is provided at an end portion of the light guide column.   The lamp cover according to claim 1, wherein the plurality of light guide pillars are integrally injection-molded to form a light guide assembly, the light guide assembly is fixed to the inside of the translucent case, and the back of the light guide assembly is formed. A lamp cover, wherein a concave portion is formed at a position corresponding to each light guide column, and each light guide column is hollow.   7. The lamp cover according to claim 6, wherein a fitting groove for fitting a light generation end of the LED element is provided at an end portion of the light guide column.   2. The lamp cover according to claim 1, wherein the translucent case is rectangular or elongated.   9. The lamp cover according to claim 8, wherein the plurality of light guide pillars are integrally injection-molded to form a light guide assembly, the light guide assembly is fixed to the inside of the translucent case, and the back of the light guide assembly is formed. A lamp cover, wherein a concave portion is formed at a position corresponding to each light guide column, and each light guide column is hollow.   10. The lamp cover according to claim 9, wherein a fitting groove for fitting a light generation end of the LED element is provided at an end of the light guide column. A lamp head and a lamp cover attached to the lamp head are included, and a plurality of LED elements are installed at connection ends corresponding to the lamp cover of the lamp head, and each LED element is driven into the lamp head to emit light. In the LED bulb in which a circuit device is provided for generating a lamp, and a connector for electrically connecting the circuit device and an external bulb socket is provided at the end of the lamp head.
A light guide column is provided inside the translucent case of the lamp cover so as to oppose each LED element, and the outer diameter of the root portion of each light guide column at a position close to the translucent case is large, and at least one side is adjacent. The light guide pillars are connected to the roots of the matching light guide pillars, and each light guide pillar is extended to a position closer to the LED element than the root part while gradually reducing the outer diameter to form a cone shape. An LED bulb, wherein the LED bulb is uniformly diffused through a light column, reaches a translucent case, and is radiated to the outside.   12. The LED bulb according to claim 11, wherein the translucent case has an arc shape, a plurality of light guide columns are formed integrally with the translucent case, and the light guide columns are arranged in an annular shape. LED bulb.   13. The LED bulb according to claim 12, wherein a light guide is formed by tilting and extending a connection position with the translucent case on the outer periphery of the root portion of the plurality of light guide columns arranged in an annular shape. valve.   13. The LED bulb according to claim 12, wherein a diameter-expanded convex portion diffusing toward the four circumferences is provided at a connection position between the root portion of each light guide column and the translucent case, and at least one side of the diameter-expanded convex portion is extended to form an arc. An LED bulb, wherein a convex light guide is formed and a diameter-expanded convex portion of a light guide column adjacent to the arc-shaped light guide is connected.   12. The LED bulb according to claim 11, wherein a fitting groove for fitting a light generation end of the LED element is provided at an end portion of the light guide column.   12. The LED bulb according to claim 11, wherein the plurality of light guide pillars are integrally injection-molded to form a light guide assembly, the light guide assembly is fixed to the inside of the translucent case, and the back of the light guide assembly is formed. An LED bulb, wherein a recess is formed at a position corresponding to each light guide column, and each light guide column is hollow.   17. The LED bulb according to claim 16, wherein a fitting groove for fitting a light generation end of the LED element is provided at an end portion of the light guide column.   12. The LED bulb according to claim 11, wherein the translucent case is rectangular or elongated.   19. The LED bulb according to claim 18, wherein the plurality of light guide pillars are integrally injection-molded to form a light guide assembly, the light guide assembly is fixed to the inside of the translucent case, and the back of the light guide assembly is formed. An LED bulb, wherein a recess is formed at a position corresponding to each light guide column, and each light guide column is hollow.   19. The LED bulb according to claim 18, wherein a fitting groove for fitting a light generation end of the LED element is provided at an end portion of the light guide column.   12. The LED bulb according to claim 11, wherein an engagement flange is provided in the translucent case, and an engagement groove is provided at a position corresponding to the engagement flange of the lamp head to the lamp head of the translucent case. An LED bulb, wherein the engagement flange is provided with at least one notch, and a stopper is provided at a position corresponding to the notch of the lamp head.   The LED bulb according to claim 11, wherein the lamp head includes a connector for electrical connection with an external bulb socket, and the shape of the connector is either a plug-in type plug or a spiral type plug. LED bulb.   12. The LED bulb according to claim 11, wherein the circuit device is provided with a heat radiating fin set, and the lamp head is provided with a heat radiating hole.

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