JP5344198B2 - Light bulb shaped lamp and lighting equipment - Google Patents

Description

  The present invention relates to a light bulb shaped lamp using an LED as a light source and a lighting fixture using the light bulb shaped lamp.

  Conventionally, in a light bulb shaped lamp using an LED as a light source, a substrate on which an LED is mounted is attached to one end side of a heat radiator and a glove that covers the substrate is attached, and an insulating member is interposed on the other end side of the heat radiator. A base is attached and a lighting circuit is housed inside the insulating member.

The radiator is integrally formed of aluminum die casting so that the heat of the LED can be efficiently conducted and radiated to the outside (see, for example, Patent Document 1).

JP 2009-37995 A (page 5, FIG. 1)

  However, since the heat sink of the bulb-type lamp is made of aluminum die casting, the shape of the heat sink is limited to the range that can be molded by die casting, so there is a limit to adopting a shape with excellent heat dissipation. There is a problem that it is difficult to further improve the heat dissipation performance.

  Moreover, since the heatsink of the light bulb shaped lamp is made of aluminum die casting, there is a problem that the manufacturing cost is increased and the weight is increased. If the weight of the light bulb shaped lamp is large, the load applied to the lighting fixture using the light bulb shaped lamp also becomes large, so that there is a problem that the support strength must be improved.

  The present invention has been made in view of these points, and an object thereof is to provide a light bulb-type lamp that has high heat dissipation performance, is lightweight and inexpensive, and a lighting fixture using the light bulb-type lamp.

The light bulb shaped lamp according to claim 1 is composed of a module substrate having an LED; a heat dissipation member formed by pressing a metal plate, and a substrate bonding portion in which the module substrate is attached to one end side so as to be thermally conductive. And a metal heat dissipating member provided on the heat dissipating member so as to conduct heat; a base fixing portion, one end side being provided inside the heat dissipating member, and the other end side from the heat dissipating member to the base fixing portion. An insulative holder provided so as to protrude; a base provided in the base fixing portion ; and a lighting circuit housed in the holder .

  The LED is, for example, a COB (Chip On Board) type in which a chip-shaped LED is directly mounted on a substrate and wire-bonded, or an SMD (Surface Mount Device) in which a light-emitting body with a connection terminal on which the chip-shaped LED is mounted is mounted. ) Type, etc., mounted on the board One or a plurality of LEDs may be mounted on the substrate.

  The substrate is formed, for example, in a flat plate shape using a metal material having excellent thermal conductivity such as aluminum or a ceramic material, and is capable of conducting heat by surface-contacting the radiator with screws or the like.

  The radiator is formed by pressing a metal plate, and may be configured by one component or may be configured by integrally combining components that are pressed into two or more components. Further, a heat conducting member that conducts heat efficiently may be interposed between the module substrate and the radiator.

  For example, a base that can be connected to a socket for a general lighting bulb such as E17 type or E26 type is used.

  The lighting circuit has, for example, a power supply circuit that outputs a constant direct current, and supplies power to the LED by a desired power supply unit.

  In addition, although the light-transmitting glove etc. which cover the one end side of a module board | substrate may be comprised, it is not an essential structure of this invention.

  For example, the heat radiating part is formed into a corrugated shape in the radial direction, the tip side is formed in a comb-like shape, or the outer peripheral part of the cover part is formed so as to surround substantially the entire surface area. By making it wide, the heat dissipation performance can be improved.

  The heat dissipating part thermally connected to the substrate bonding part includes cases where the substrate bonding part and the heat dissipating part are separate and integrated.

  The contact portion between the cover member and the heat radiating member may be provided with a heat radiating sheet, a resin material, grease, or the like to improve thermal conductivity, or the cover member and the heat radiating member may be fixed integrally by welding. Conductivity may be improved.

For example, the heat dissipating member is formed into a corrugated shape, is formed in a comb-like shape having a plurality of slits, or is formed so as to surround substantially the entire outer peripheral portion of the cover portion. The heat dissipation performance can be improved.
The lighting fixture according to claim 7 comprises: a fixture main body having a socket; and the light bulb shaped lamp according to any one of claims 1 to 6 attached to the socket of the fixture main body.

According to the light bulb shaped lamp according to claim 1, since the metal radiator is formed by pressing, it becomes easier to form the radiator in a shape excellent in heat dissipation performance compared to the die casting, and the heat dissipation performance is high. A lightweight and inexpensive light bulb shaped lamp can be provided. Moreover, since the thermal radiation body thermally connects the thermal radiation part to the board | substrate junction part which a module board | substrate contacts so that heat conduction is possible, the thermal radiation performance can be improved.

  According to the lighting fixture of the seventh aspect, the light bulb shaped lamp is light and the load applied to the fixture body can be reduced.

It is sectional drawing of the lightbulb-shaped lamp which shows the 1st Embodiment of this invention. It is a perspective view of the decomposition | disassembly state of the heat radiator of a bulb-type lamp same as the above. It is a perspective view of the assembly state of the heat sink of a bulb-type lamp same as the above. It is sectional drawing of the lighting fixture using a bulb-type lamp same as the above. It is sectional drawing of the light bulb shaped lamp which shows the 2nd Embodiment of this invention. It is sectional drawing of the lightbulb-shaped lamp which shows the 3rd Embodiment of this invention. It is a perspective view of the decomposition | disassembly state of the heat radiator of a bulb-type lamp same as the above.

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

  1 to 4 show a first embodiment, in which FIG. 1 is a sectional view of a light bulb shaped lamp, FIG. 2 is a perspective view of an exploded state of a heat radiating body of the light bulb shaped lamp, and FIG. FIG. 4 is a sectional view of a lighting fixture using a light bulb shaped lamp.

  In FIG. 1, 11 is a light bulb shaped lamp. The light bulb shaped lamp 11 is a metal radiator 12, and a module substrate attached to one end side of the heat radiator 12 (one end side in the axial direction of the light bulb shaped lamp 11). 13, an insulating holder 14 attached to the other end of the radiator 12, a base 15 attached to the other end of the holder 14, and a module substrate 13 covering the module substrate 13 and attached to one end of the radiator 12. A globe 16 having translucency, and a lighting circuit 17 housed inside the holder 14 between the radiator 12 and the base 15 are provided.

  As shown in FIGS. 1 to 3, the radiator 12 includes a cover member 21 and a heat radiating member 22, and the cover member 21 and the heat radiating member 22 are integrally combined.

  The cover member 21 is formed by pressing from a single metal plate such as an aluminum plate having a maximum thickness of about 3 mm. The cover member 21 has a cylindrical shape substantially the same diameter as the outer diameter of the base 15 and has one end and the other end. The cover portion 23 has a through-opening opening, and an annular flange portion 24 bent from one end of the cover portion 23 in the outer diameter direction. The surface on one end side of the flange portion 24 is configured as a substrate bonding portion 25 that contacts the module substrate 13 so that heat conduction is possible, and an edge portion 26 protruding from the substrate bonding portion 25 is formed on the peripheral edge portion of the flange portion 24, A plurality of attachment holes 27 for screwing the module substrate 13 are formed in the substrate bonding portion 25.

  The heat dissipating member 22 is formed by pressing from a single metal plate such as an aluminum plate having a maximum size of about 3 mm, and has a cylindrical fitting portion 28 that fits on the outer periphery of the cover portion 23 of the cover member 21. It has an annular joint portion 29 that is joined to the surface on the other end side of the flange portion 24, that is, a surface opposite to the substrate joint portion 25, and a heat dissipation portion 30 that is bent from the periphery of the joint portion 29. . The heat dissipating part 30 is inclined toward the base 15 side so that the tip side approaches the outer peripheral part of the cover part 23 and is spaced from the outer peripheral part of the cover part 23, so that the surface area is increased. It is formed in a corrugated shape that is uneven in the direction.

  Then, the radiator 12 is press-fitted from the other end side of the cover part 23 of the cover member 21 to the inside of the fitting part 28 of the heat radiation member 22, and the flange part 24 of the cover member 21 is joined to the joint part 29 of the heat radiation member 22. It is assembled together by joining. In the assembled state, the cover part 23 of the cover member 21 and the fitting part 28 of the heat dissipation member 22 are fixed to each other by press-fitting, and the cover part 23 and the flange part 24 of the cover member 21 and the fitting part 28 of the heat dissipation member 22 are fixed. The joint 29 is joined in surface contact so as to efficiently conduct heat. In order to join the cover member 21 and the heat radiating member 22 efficiently in a heat conductive manner, a heat conductive member such as a heat radiating sheet or grease may be interposed between the joint surfaces of the cover member 21 and the heat radiating member 22, Alternatively, the cover member 21 and the heat dissipation member 22 may be welded.

  Further, the module substrate 13 includes a disk-shaped substrate 33 and a plurality of LEDs 34 mounted on a mounting surface which is one surface side of the substrate 33.

  The substrate 33 is formed of a metal material such as aluminum or an insulating material such as ceramics, and a wiring pattern (not shown) to which the plurality of LEDs 34 are electrically connected is formed on the mounting surface. A wiring hole 33a is formed in the vicinity of the center of the substrate 33 to allow wiring to be connected to the wiring pattern from the lighting circuit 17, and a connector provided at the tip of the wiring that has passed through the wiring hole 33a is connected. A connector receiver 35 is disposed. The connector receiver 35 is connected to the wiring pattern of the substrate 33. Further, a plurality of insertion holes 33b are formed in the substrate 33, and a plurality of screws 36 are screwed into the respective mounting holes 27 of the heat radiator 12 through the insertion holes 33b, whereby the substrate 33 is fixed to the heat radiator 12. Yes. By this screwing, the surface opposite to the mounting surface of the substrate 33 is pressure-bonded to the substrate bonding portion 25 of the radiator 12 in a surface contact state, and is bonded so as to be able to conduct heat efficiently. Also in this case, a heat conducting member such as a heat radiating sheet or grease that can efficiently conduct heat may be interposed between the joint surfaces of the substrate 33 and the heat radiating body 12.

  The LED 34 includes, for example, an LED chip that emits blue light, and a sealing resin such as a silicone resin that covers the LED chip, and the phosphor that is excited by a part of the blue light and emits yellow light to the sealing resin. The LED 34 emits white illumination light.

  The holder 14 is formed in a cylindrical shape from an insulating material such as PBT resin, and is interposed between the cover portion 23 of the cover member 21 and the base 15 at the outer peripheral portion to insulate each other. An annular protrusion 38 is formed, and a radiator fixing part 39 is formed on the outer peripheral part on one end side of the protrusion 38 to which the cover part 23 of the cover member 21 is fitted and fixed. A base fixing portion 40 to which the base 15 is fitted and fixed is formed on the outer peripheral portion. A partition wall 42 having a wiring hole 41 through which a wiring connected from the lighting circuit 17 to the substrate 33 is passed is formed on one end side of the holder 14, and an opening is formed on the other end side so that the lighting circuit 17 can be accommodated.

  The base 15 is connectable to a socket for general lighting bulbs such as E17 type and E26 type, for example, a shell 45 fitted into the holder 14 and fixed by caulking, and the other end of the shell 45 An insulating portion 46 provided on the side, and an eyelet 47 provided on the top of the insulating portion 46 are provided.

  Further, the globe 16 is formed in a spherical shape so as to cover the module substrate 13 with glass or synthetic resin having light diffusibility, and is formed so as to be substantially continuous with the heat radiating portion 30 of the heat radiating member 22. Yes. The inside of the globe 16 may be sealed to prevent intrusion of dust, pests, etc., or may be opened to the outside through a ventilation filter or the like.

  The lighting circuit 17 is a circuit that supplies a constant current to the LED 34, for example, and has a circuit board on which a plurality of circuit elements constituting the circuit are mounted, and this circuit board is housed in the holder 14. Is fixed. The shell 45 and eyelet 47 of the base 15 are electrically connected to the input side of the lighting circuit 17 by wiring, and the wiring connected to the output side of the lighting circuit 17 is the wiring hole 41 of the holder 14 and the wiring hole 33a of the substrate 33. Through the wiring pattern of the substrate 33.

  FIG. 4 shows a lighting fixture 50 that is a downlight using the light bulb shaped lamp 11. The lighting fixture 50 has a fixture main body 51, and a socket 52 and a reflector 53 are provided in the fixture main body 51. It is arranged.

  Then, when the light bulb shaped lamp 11 is attached to the socket 52 of the lighting fixture 50 and energized, the lighting circuit 17 operates, power is supplied to each LED 34, each LED 34 emits light, and this light diffuses through the globe 16. Radiated.

  The heat generated when the LED 34 is turned on is thermally conducted to the substrate 33 and is also conducted from the substrate 33 to the radiator 12 and is radiated from the radiator 12 into the air. That is, the heat generated when the LED 34 is turned on is efficiently conducted in the order of the substrate 33, the substrate joint portion 25 and the cover portion 23 of the cover member 21, the joint portion 29 and the fitting portion 28 of the heat dissipation member 22, and the heat dissipation member. The cover member 21 including the heat radiating portion 30 and the entire heat radiating member 22 are efficiently radiated into the air. In particular, the heat dissipating part 30 of the heat dissipating member 22 is formed in a corrugated shape in the radial direction, ensuring a large surface area and providing a space between the cover part 23 and air permeability. Therefore, heat is radiated more efficiently.

  In this way, the heat sink 12 made of metal is formed by pressing, so it becomes easier to form the heat sink 12 in a shape with excellent heat dissipation performance compared to die casting, and the light bulb shape has high heat dissipation performance and is lightweight and inexpensive. A lamp 11 can be provided.

  Since the heat dissipating body 12 thermally connects the heat dissipating part 30 to the substrate joining part 25 that contacts the substrate 33 so as to conduct heat, the heat dissipating performance can be improved.

  By disposing the radiator 12 into a cylindrical cover member 21 and an annular heat dissipation member 22 fitted to the outer periphery of the cover member 21, the heat dissipation member 22 can be easily formed into a shape with excellent heat dissipation performance. Thus, the heat dissipation performance can be improved.

  In addition, the lighting fixture 50 that uses the bulb-shaped lamp 11 can reduce the load applied to the fixture body 51 and simplify the structure because the bulb-shaped lamp 11 is light.

  Next, FIG. 5 shows a second embodiment, and FIG. 5 is a sectional view of a light bulb shaped lamp.

  As in the first embodiment, the heat radiating body 12 includes a cover member 21 and a heat radiating member 22. However, the heat radiating member 22 is made of a thin metal plate with better press formability, and the fitting portion 28 is fitted on the outer peripheral portion of the cover portion 23 of the cover member 21 on the other end side close to the base 15 and is connected to the joint portion. 29 is joined to the surface on the other end side of the flange portion 24, that is, the surface opposite to the substrate joint portion 25, and the heat radiating portion 30 is conical between one end side of the fitting portion 28 and the peripheral portion of the joint portion 29. It is arranged in a plane. A space portion 56 is formed between the heat radiating portion 30 and the outer peripheral portion of the cover portion 23, and a plurality of slits 57 are formed in the heat radiating portion 30 so as to allow the space portion 56 and the outside to communicate with each other.

  In addition, a disc-shaped substrate mounting plate 58 is joined to the flange portion 24 of the cover member 21 so as to be able to conduct heat, and the substrate 33 is joined to the substrate attaching plate 58 so as to be able to conduct heat.

  In this light bulb shaped lamp 11, since the heat radiating portion is formed in a conical shape, the appearance can be improved while ensuring heat radiation.

  In FIG. 5, a part of the joint portion 29 of the heat radiating member 22 is separated from the flange portion 24 of the cover member 21 to form a gap. A heat conducting member such as grease may be interposed, or surface contact may be made without a gap.

  Next, FIG. 6 and FIG. 7 show a third embodiment, FIG. 6 is a sectional view of the light bulb shaped lamp, and FIG. 7 is a perspective view of an exploded state of the radiator of the light bulb shaped lamp.

  As in the first embodiment, the heat radiating body 12 includes a cover member 21 and a heat radiating member 22. However, the cover member 21 is formed with a partition wall portion 61 that closes one end side of the cylindrical cover portion 23. The partition wall portion 61 constitutes a part of the substrate bonding portion 25 to which the substrate 33 is bonded so as to be thermally conductive. The partition wall 61 is formed with a wiring hole 62 through which wiring connected from the lighting circuit 17 to the wiring pattern of the substrate 33 is passed.

  The heat dissipating member 22 includes a cylindrical fitting portion 28 that fits on the outer periphery of the cover portion 23 of the cover member 21, and an annular joining portion 29 that forms part of the substrate joining portion 25 to which the substrate 33 is joined so as to be thermally conductive. The outer heat radiating portion 30a is bent from the peripheral portion of the joint portion 29, and the inner heat radiating portion 30b is bent from the other end of the fitting portion. A plurality of attachment holes 63 for screwing the module substrate 13 are formed in the joint portion 29.

  The outer heat radiating part 30a is inclined toward the base 15 side so that the tip side approaches the outer peripheral part of the cover part 23, is formed in a comb shape, and is separated from the outer peripheral part of the cover part 23. Therefore, the surface area is increased and the air permeability to the inside of the heat radiating member 22 is ensured.

  The inner heat dissipating part 30b is projected in the radial direction toward the inner side of the outer heat dissipating part 30a, is formed in a comb shape, and is separated from the joint part 29 and the outer heat dissipating part 30a. Further, the surface area is increased and the air permeability to the inside of the heat radiating member 22 is ensured.

  Then, the radiator 12 is press-fitted from one end side of the cover part 23 of the cover member 21 to the inside of the fitting part 28 of the heat dissipation member 22, and the partition part 61 of the cover member 21 and the joint part 29 of the heat dissipation member 22 are connected. They are placed on the same plane and assembled together. In the assembled state, the cover part 23 of the cover member 21 and the fitting part 28 of the heat radiating member 22 are fixed to each other by press-fitting, and these are joined in surface contact so as to efficiently conduct heat.

  The module substrate 13 is fixed to the heat radiating body 12 by screwing a plurality of screws 36 into the mounting holes 63 of the heat radiating member 22 through the substrate 33. By this screwing, the surface opposite to the mounting surface of the substrate 33 is pressure-bonded in a surface contact state to the substrate joint portion 25 constituted by the partition wall portion 61 of the cover member 21 and the joint portion 29 of the heat radiating member 22. It is joined so that heat conduction is possible. In this case, a heat conducting member such as a heat radiating sheet or grease that enables efficient heat conduction may be interposed between the joint surfaces of the substrate 33 and the heat radiating body 12.

  In the light bulb shaped lamp 11, the heat conducted from the LED 34 to the substrate 33 is conducted directly to the heat radiating member 22 of the radiator 12 and also through the cover member 21. The heat efficiently conducted to the member 22 can be efficiently radiated by the outer radiating portion 30a and the inner radiating portion 30b. Thereby, the heat dissipation performance is high, the temperature of the LED 34 can be reduced, and the life can be extended.

  The shape of the outer heat radiating portion 30a and the inner heat radiating portion 30b is not limited to a comb shape, and may be a wave shape as in the first embodiment. It is only necessary to ensure and efficiently dissipate heat.

  Moreover, in each embodiment, although the heat radiator 12 was comprised by 2 components, the cover member 21 and the heat radiating member 22, you may comprise by 1 component which integrated the cover member 21 and the heat radiating member 22, or You may comprise combining 3 or more parts.

11 Light Bulb Lamp, 12 Heat Dissipator, 13 Module Board, 15 Base, 17 Lighting Circuit, 21 Cover Member, 22 Heat Dissipation Member, 23 Cover Part, 25 Board Junction, 30, 30a, 30b Heat Dissipation Part, 33 Board, 34 LED , 50 lighting fixtures, 51 fixture body, 52 socket

Claims (7)

A module substrate having LEDs;
A heat dissipation member formed by pressing a metal plate, and a substrate bonding portion in which a module substrate is attached to one end side so as to be able to conduct heat, and the substrate bonding portion is provided on the heat dissipation member so as to be able to conduct heat Heat sink made of;
An insulative holder provided with a base fixing portion, one end side being provided inside the heat radiating body and the other end side being provided so that the base fixing portion protrudes from the heat radiating body;
A base provided in the base fixing part ;
A lighting circuit housed inside the holder ;
A light bulb shaped lamp characterized by comprising: 2. The light bulb shaped lamp according to claim 1, wherein the heat dissipating member and the substrate joint are surface-connected . The board bonding part has a mounting hole, and the screw is screwed into the mounting hole so that the other surface of the module board is pressure-bonded to the one surface of the board bonding part in surface contact. The light bulb shaped lamp according to claim 1 or 2, characterized in that. 4. The light bulb shaped lamp according to claim 3, wherein the module substrate is provided with an insertion hole, the board joint portion is provided with an attachment hole, and a screw is screwed into the attachment hole through the insertion hole. The light bulb shaped lamp according to any one of claims 1 to 4, wherein the holder is formed in a cylindrical shape. 6. The light bulb shaped lamp according to claim 1, wherein the heat dissipating member has a conical shape whose diameter decreases from one end side to the other end side. An instrument body having a socket;
A light bulb-shaped lamp according to any one of claims 1 to 6, which is mounted in a socket of the fixture body.

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