JP2010123359A - Led lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED lamp with an assembly work facilitated. <P>SOLUTION: In a straight-tube LED lamp A provided with a substrate 1, a plurality of LEDs 2 mounted on one of the faces 1a of the substrate 1, and a cylindrical case 6 housing the substrate 1, the case 6 has protruded pieces 61 integrally formed protruded inward so as to make a pair on a face parallel with a center axis O1 of the case 6, and the substrate 1 is regulated against movement in a vertical direction to the center axis O1 of the case 6 as its one face 1a is in contact with the protruded piece 61. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an LED lamp that uses an LED as a light source and is suitable for use as an alternative to a fluorescent lamp.

  FIG. 4 shows a cross-sectional view of an example of a conventional LED lamp (see, for example, Patent Document 1). The LED lamp X shown in the figure includes a long rectangular substrate 91, a plurality of LEDs 92 mounted on one surface of the substrate 91, a cylindrical tube 93 that accommodates the substrate 91, and a longitudinal direction of the tube 93. A base 94 provided at both ends, a terminal 95 fixed to the base 94, and a circuit 96 for lighting the LED 92 are provided. The substrate 91 is supported by a base 94, for example, and wiring (not shown) connected to the plurality of LEDs 92 and the terminals 95 is formed on the substrate 91. This LED lamp X is configured such that a plurality of LEDs 92 can emit light by fitting a terminal 95 into a socket of a general fluorescent lamp lighting fixture. Since the LED 92 has low power consumption and a long life, if the LED lamp X is used as an alternative to the fluorescent lamp, improvement in cost and environment can be expected. The general fluorescent lamp luminaire is a luminaire widely used mainly for indoor general illumination. For example, in Japan, a commercial 100 V power source is used, and a straight tube fluorescent lamp defined in JIS C7617 or A lighting fixture to which a ring-shaped fluorescent lamp defined in JIS C7618 is attached.

  However, when assembling the LED lamp X having the above-described configuration, the base plate 94 is inserted into both ends of the tube 93 while the substrate 91 is inserted into the tube 93 and the relative positional relationship between the tube 93 and the substrate 91 is kept constant. It is necessary to install. Therefore, in the conventional LED lamp X, assembly work at the time of manufacture is troublesome.

Japanese Utility Model Publication No. 6-54103

  The present invention has been conceived under the above-described circumstances, and an object thereof is to provide an LED lamp capable of facilitating assembly work.

  An LED lamp provided by the present invention is a straight-tube LED lamp comprising a substrate, a plurality of LEDs mounted on one surface of the substrate, and a cylindrical case that accommodates the substrate, The case is integrally formed with a protruding piece protruding inward so as to form a pair in a plane parallel to the central axis of the case, and the one surface of the substrate is in contact with the protruding piece. Thus, the movement in the direction perpendicular to the central axis with respect to the case is restricted.

  According to the LED lamp having such a configuration, a pair of projecting pieces are provided on the inside of the case, and these projecting pieces abut against one surface at both ends in the width direction of the substrate, thereby Movement in a direction perpendicular to the central axis of the case (radial direction of the case) is restricted. Thereby, when assembling the LED lamp, the substrate can be positioned relative to the case simply by inserting the substrate into the case. Therefore, the assembly work of the LED lamp can be easily performed.

  In a preferred embodiment of the present invention, the substrate is in a position deviated from the central axis of the case to the side opposite to the one surface.

  According to such a configuration, when the light emitted from the LED is irradiated to the outside through the case, the irradiation light is irradiated in an angular range exceeding 180 ° in the circumferential direction with respect to the central axis of the case. Therefore, for example, compared with the case where the substrate is arranged along the central axis of the case, the angle range of the irradiation light irradiated from the case can be increased, and the irradiation range by the LED lamp can be substantially enlarged. .

  In a preferred embodiment of the present invention, the heat dissipating member further extending in parallel with the central axis of the case, and a pair of caps attached to both ends of the heat dissipating member, the substrate is disposed in a stack on the heat dissipating member. The heat dissipating member is in contact with the inner surface of the case.

  According to such a structure, since the board | substrate with which several LED was mounted is laminated | stacked and arrange | positioned on a heat radiating member, the heat | fever generate | occur | produced at the time of lighting of LED can be effectively released outside via a heat radiating member. And deterioration of the LED can be prevented. Moreover, since the heat radiating member is extended along substantially the whole longitudinal direction of a case, it can function as a structural material of an LED lamp. Therefore, according to such a configuration, an appropriate rigidity can be secured in the LED lamp.

  In addition, since the heat dissipating member is in contact with the inner surface of the case, the substrate and the heat dissipating member are supported at three points with respect to the case, and the relative positioning of the substrate with respect to the case can be more accurately achieved. Can do.

  In a preferred embodiment of the present invention, the apparatus further includes an additional substrate on which a plurality of power supply components are mounted on both sides.

  According to such a configuration, since a plurality of power supply components are mounted on both sides of the additional board, the mounting efficiency of the power supply components is higher than when the power supply component is mounted only on one side of the additional board. As a result, the area occupied by the additional substrate can be reduced. Therefore, about the additional board | substrate, the dimension of the longitudinal direction in alignment with the central axis of a case can be made small. As a result, in the LED lamp having the above-described configuration, the non-light emitting area can be reduced.

  In a preferred embodiment of the present invention, the plurality of power supply components include an AC / DC converter that converts alternating current into direct current.

  In a preferred embodiment of the present invention, the additional substrate is disposed so as to be separated from the heat dissipation member.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  1 to 3 show an example of an LED lamp according to the present invention. The LED lamp A of this embodiment includes a light source substrate 1, a plurality of LED modules 2, a heat radiating member 3, a power supply substrate 4, a plurality of power supply components 5, a case 6, and a pair of caps 7. For example, as an alternative to a straight tube fluorescent lamp, it is used by being attached to a general fluorescent lamp luminaire.

  The light source substrate 1 is made of, for example, a glass epoxy resin and is formed in a long rectangular shape. Wiring (not shown) is formed at appropriate positions on the surface of the light source substrate 1. The light source substrate 1 is laminated on a heat radiating member 3 described later, and is attached to the heat radiating member 3 using, for example, screws.

  The plurality of LED modules 2 are light sources of the LED lamp A, and are mounted on the upper surface 1 a of the light source substrate 1. These LED modules 2 are arranged so as to be arranged at a predetermined interval along the longitudinal direction of the light source substrate 1, and are connected in series by, for example, wiring (not shown). As the LED module 2, for example, a white LED configured in a surface mount package type is preferably used.

  The heat dissipating member 3 is made of, for example, Al and has an elongated block shape extending along the longitudinal direction of the light source substrate 1. As clearly shown in FIG. 3, a plurality of concave portions 31 are formed on the surface of the heat radiating member 3, and have a shape having irregularities. The recess 31 is formed over substantially the entire length of the heat dissipation member 3 along the longitudinal direction of the light source substrate 1. These concave portions 31 can be formed by providing convex portions on a mold used when the heat radiating member 3 is formed.

  The power supply substrate 4 is made of, for example, glass epoxy resin and is formed in a long rectangular shape. Wiring (not shown) is formed at appropriate positions on the surface of the power supply substrate 4. The power supply substrate 4 is attached to the light source substrate 1 by a plurality of metal leads 41. For example, one end of the plurality of leads 41 is fixed to both longitudinal ends of the power supply substrate 4 by soldering, and the other end is a pad (not shown) provided on the upper surface 1 a of the light source substrate 1. Soldered to As a result, the power supply substrate 4 is spaced from the light source substrate 1 or the heat dissipation member 3. Note that the wiring of the light source substrate 1 and the wiring of the power supply substrate 4 are electrically connected via leads 41.

  The plurality of power supply components 5 function as a power supply circuit for lighting the LED module 2, and are mounted on both surfaces (upper surface 4 a and lower surface 4 b) of the power supply substrate 4. The plurality of power supply components 5 include an AC / DC converter 51 and other functional components 52 such as a capacitor and a resistor, and converts alternating current supplied from a commercial power source into a direct current constant current and supplies it to the LED module 2. It is comprised as follows. The AC / DC converter 51 occupies a larger space than the other components mounted on the power supply board 4.

  The case 6 is for housing the light source substrate 1, the heat radiating member 3, and the power supply substrate 4, and as shown in FIG. 3, has a straight tubular shape having a circular cross section. On the inner surface of the case 6, a pair of projecting pieces 61 projecting inward are integrally formed. Each of the protruding pieces 61 is biased downward (in the radial direction) from the central axis O1 of the case 6 and protrudes in a plane parallel to the central axis O1, and extends in a direction along the central axis O1. Yes. The case 6 having such a configuration is made of a synthetic resin such as polycarbonate, and is integrally formed by extrusion molding.

  About the light source board | substrate 1 and the heat radiating member 3, the width dimension of the light source board | substrate 1 thru | or the heat radiating member 3, and the vertical dimension of the heat radiating member 3 are prescribed | regulated so that it can accommodate below the protrusion piece 61 in FIG. ing. In the accommodated state shown in FIG. 3, the light source substrate 1 is restricted from moving in the direction perpendicular to the central axis O <b> 1 (upward in the drawing) with respect to the case 6 by the upper surface 1 a contacting the protruding piece 61. The lower part of the heat radiating member 3 is in contact with the inner surface of the lower part of the case 6.

  Here, the light source substrate 1 is located at a position deviated from the central axis O1 of the case 6 to the side opposite to the upper surface 1a, and the power supply substrate 4 is located near the central axis O1 of the case 6. Thus, since the power supply substrate 4 is located closer to the central axis O1 than the light source substrate 1, the width dimension of the power supply substrate 4 can be made larger than the width dimension of the light source substrate 1. The light source substrate 1, the heat dissipation member 3, and the power supply substrate 4 are accommodated in the case 6 by inserting the light source substrate 1 and the heat dissipation member 3 into the case 6 below the protruding piece 61 while sliding.

  The pair of bases 7 are for supplying power from a commercial AC power source by being mounted on a socket of a fluorescent lamp lighting fixture. As shown in FIG. 2, the base 7 includes a bottomed cylindrical cover body 71, a resin block 72 accommodated and held in a hollow portion of the cover body 71, and two terminals 73. A recess 72 a is formed in the resin block 72, and the base 7 is attached to the heat dissipating member 3 by inserting a longitudinal end of the heat dissipating member 3 into the recess 72 a. Thereby, in the LED lamp A, the heat dissipation member 3 is supported by the pair of caps 7.

  A partially cylindrical gap is provided between the cover body 71 and the resin block 72, and both ends in the longitudinal direction of the case 6 are inserted into the gap when the base 7 is attached to the heat dissipation member 3. Yes. Here, as shown in FIG. 2, a gap is provided between the longitudinal end edge 6 a of the case 6 and the end edge 72 b of the resin block 72. The terminal 73 is provided so as to penetrate the cover body 71 and the resin block 72. One end portion (outer end portion) of the terminal 73 is a portion that fits into the insertion port of the socket of the fluorescent lamp lighting device, and the other end portion of the terminal 73 is between the wiring of the light source substrate 1. Electrical continuity is achieved.

  Next, the operation of the LED lamp A having the above configuration will be described.

  When using the LED lamp A, the LED module 2 can be made to emit light by supplying power after fitting the terminal 73 of the base 7 to the socket of the fluorescent lamp lighting fixture.

  In the present embodiment, a pair of projecting pieces 61 are provided inside the case 6, and these projecting pieces 61 abut against the upper surface 1 a at both ends in the width direction of the light source substrate 1, thereby The movement of the case 6 in the direction perpendicular to the central axis O1 (the radial direction of the case 6) is restricted. Thus, when the LED lamp A is assembled, the light source substrate 1 can be positioned relative to the case 6 simply by inserting the light source substrate 1 into the case 6. Therefore, the assembly work of the LED lamp A can be easily performed.

  Since the light source substrate 1 is in a position deviated from the central axis O1 of the case 6 to the side opposite to the upper surface 1a (the mounting surface of the LED module 2), the light emitted from the LED module 2 is exposed to the outside through the case 6. When irradiated, the irradiated light is irradiated in an angular range exceeding 180 ° in the circumferential direction with respect to the central axis O1 of the case 6. Therefore, for example, compared with the case where the light source substrate 1 is arranged along the central axis O1 of the case 6, the angle range of the irradiation light irradiated from the case 6 can be increased, and the irradiation range by the LED lamp A is substantially reduced. Can be expanded.

  In the present embodiment, the light source substrate 1 is stacked on the heat dissipation member 3. For this reason, the heat | fever generate | occur | produced at the time of lighting of the LED module 2 can be effectively escaped outside via the heat radiating member 3, and deterioration of the LED module 2 can be prevented. Further, since the heat radiating member 3 extends along substantially the entire length of the case 6, it can function as a structural material of the LED lamp A. Therefore, according to the configuration including the heat radiating member 3, an appropriate rigidity can be secured in the LED lamp A.

  Further, since the heat radiating member 3 is in contact with the inner surface of the case 6, the light source substrate 1 and the heat radiating member 3 are supported at three points with respect to the case 6. Positioning can be achieved more accurately.

  In the present embodiment, since the case 6 is made of a synthetic resin, it is less likely to be damaged than a fluorescent lamp constituted by a glass tube. Further, as described above with reference to FIG. 2, a gap is provided between the leading edge 6 a of the case 6 and the edge 72 b of the resin block 72 of the base 7. For this reason, even when the case 6 is thermally expanded when the LED module 2 is turned on, the amount of elongation in the longitudinal direction of the case 6 can be absorbed, and the case 6 is not unduly deformed.

  The power supply substrate 4 is supported by the heat radiating member 3 via the light source substrate 1. That is, the power supply substrate 4 is supported in a stable state by the heat radiating member 3 that can function as a structural material, and can be disposed at a desired position in the case 6.

  In the present embodiment, since the plurality of power supply components 5 are mounted on both surfaces (the upper surface 4a and the lower surface 4b) of the power supply substrate 4, for example, compared with the case where the power supply components 5 are mounted only on the upper surface 4a of the power supply substrate 4. Thus, the mounting efficiency of the power supply component 5 is increased, and the area occupied by the power supply substrate 4 can be reduced. Therefore, the size of the power supply board 4 in the longitudinal direction along the central axis O1 of the case 6 can be reduced. As a result, in the LED lamp A, the non-light emitting area can be reduced.

  In the present embodiment, an AC / DC converter 51 is included in the plurality of power supply components 5 that function as a power supply circuit for the LED lamp A. For this reason, the direct current constant supplied to the LED module 2 can be created easily, and the configuration of the power supply circuit can be simplified. Further, although the AC / DC converter 51 occupies a relatively large size in the space, the power supply board 4 is disposed away from the light source board 1 toward the central axis O1 of the case 6, so The mounted AC / DC converter 51 can be accommodated in the case 6 without interfering with the case 6.

  The LED lamp according to the present invention is not limited to the embodiment described above. The specific configuration of each part of the LED lamp according to the present invention can be varied in design in various ways.

It is a perspective view which shows an example of the LED lamp which concerns on this invention. It is principal part sectional drawing in alignment with the II-II line of FIG. It is an expanded sectional view which follows the III-III line of FIG. It is sectional drawing which shows an example of the conventional LED lamp.

Explanation of symbols

A LED lamp O1 (case) central axis 1 Light source substrate (substrate)
2 LED module (LED)
3 Heat dissipation member 4 Power supply board (additional board)
5 Power supply component 6 Case 7 Base 1a Upper surface (one surface of the substrate)
4a Upper surface 4b of additional board 41b Lower surface 41 of additional board Lead 51 AC / DC converter 61 Projection piece 71 Cover body 72 Resin block 73 Terminal

Claims (6)

A straight tubular LED lamp comprising a substrate, a plurality of LEDs mounted on one surface of the substrate, and a cylindrical case for housing the substrate,
The case is integrally formed with projecting pieces that project inward to form a pair in a plane parallel to the central axis of the case,
The LED lamp according to claim 1, wherein movement of the substrate in a direction perpendicular to the central axis relative to the case is restricted when the one surface is in contact with the protruding piece.   2. The LED lamp according to claim 1, wherein the substrate is in a position deviated from a central axis of the case to a side opposite to the one surface. A heat dissipating member extending in parallel with the central axis of the case, and a pair of caps attached to both ends of the heat dissipating member;
The substrate is laminated on the heat dissipation member,
The LED lamp according to claim 1, wherein the heat radiating member is in contact with an inner surface of the case.   The LED lamp according to claim 1, further comprising an additional substrate on which a plurality of power supply components are mounted on both sides.   The LED lamp according to claim 4, wherein the plurality of power supply components include an AC / DC converter that converts alternating current into direct current.   6. The LED lamp according to claim 4, wherein the additional substrate is disposed apart from the heat dissipation member.

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