JP6796268B2 - Lamp device and lighting device - Google Patents

Description

An embodiment of the present invention relates to a lamp device using a light emitting module and a lighting device using the lamp device.

Conventionally, some lamp devices using a light emitting module are made of metal and have a tubular housing. In this lamp device, a resin cover is inserted inside the housing, the cover is fixed to the housing with a fixture, a lighting circuit is inserted inside the cover, and the light emitting module is placed in contact with the housing. A light emitting module is installed.

However, since the number of parts constituting the housing is large and the assembly man-hours are required, improvement in assembling property is desired.

In addition, the lighting circuit may be affected by heat because the heat generated when the light emitting module is lit acts on the lighting circuit, or the lighting circuit may be affected by heat because the heat dissipation performance of the lighting circuit is low.

Japanese Unexamined Patent Publication No. 2012-74145

An object to be solved by the present invention is to provide a lamp device having improved heat dissipation of heat generated by a light emitting module, and a lighting device using the lamp device.

The lamp device of the previous embodiment is located inside a first housing portion having a tubular shape and insulating properties that opens to one end side and the other end side inside, and one end thereof. A second housing portion made of a metal material having a flat arrangement portion formed on the side in the circumferential direction, a third housing portion made of resin while covering a part of the inside of the second housing portion. A housing integrally formed by insert molding, a heat radiating plate in which a light emitting module is arranged on one end side surface and a peripheral surface on the other end side arranged in the arrangement portion of the housing, and the housing. In a lamp device having a power feeding unit arranged on the other end side and a lighting circuit arranged in the housing, the arranged portion is exposed from the first housing and the third housing, and the heat radiating plate is exposed. Is inserted from one end side of the housing and screwed from one end side of the housing by a screw so that the other end surface of the heat dissipation plate is the flat arrangement portion of the metal housing portion. It is characterized in that it is pressure-welded from the top to the other end .
A lighting device characterized by comprising.

According to the present invention, it can be expected to improve the heat dissipation of the heat generated by the light emitting module.

It is sectional drawing of the housing of the lamp device which shows one Embodiment. It is a perspective view of the disassembled state of the lamp device as above. It is a perspective view of the same lamp device. It is sectional drawing of the lighting apparatus using the same lamp apparatus.

Hereinafter, one embodiment will be described with reference to FIGS. 1 to 4.

2 and 3 show the lamp device 10. The lamp device 10 is a light bulb-shaped lamp that can be used by being attached to a socket for an incandescent light bulb for general lighting.

The lamp device 10 includes a housing 11, a heat radiating plate 12 arranged on one end side of the housing 11, a light emitting module 13 arranged on one end side of the heat radiating plate 12, and a lighting circuit arranged in the housing 11. It includes 14, a glove 15 attached to one end side of the housing 11, and a power feeding unit 16 attached to the other end side of the housing 11. The lamp device 10 has a virtual central axis extending from the globe 15 to the feeding portion 16, and the globe 15 side of the central axis is referred to as one end side and the feeding portion 16 side is referred to as the other end side.

As shown in FIGS. 1 to 3, the housing 11 is formed in a tubular shape having a large diameter on one end side and a small diameter on the other end side, and the diameter is reduced from one end side to the other end side. Inside the housing 11, a cavity 20 that opens to one end side and the other end side is formed.

The housing 11 has a first housing portion 21, a second housing portion 22 located inside the first housing portion 21, and a third housing portion 22 located inside the second housing portion 22. Has a housing portion 23 of.

The first housing portion 21 is formed of an insulating resin material. The second housing portion 22 is made of a metal material such as aluminum and is formed into a tubular shape by press molding. The third housing portion 23 is formed of an insulating resin material.

The first housing portion 21, the second housing portion 22, and the third housing portion 23 are integrally formed by insert molding. In order to form the housing 11, first, a third housing portion 23 is integrally formed inside the press-molded second housing portion 22 by insert molding, and then the second housing portion is formed. The first housing portion 21 is integrally formed on the outside of the portion 22 by insert molding.

The inner and outer surfaces of the second housing portion 22 are subjected to, for example, alumite processing or blast processing so as to improve the bonding strength and adhesion to the third housing portion 23 and the first housing portion 21. It may be.

The first housing portion 21, the second housing portion 22, and the third housing portion 23 have different thermal conductivitys, and the second housing portion 22 has the highest thermal conductivity. doing.

The relationship of thermal conductivity is higher in the order of the second housing portion 22, the first housing portion 21, and the third housing portion 23, or the second housing portion 22, the third housing portion, and the third housing portion. The order is higher in the order of 23 and the first housing portion 21.

When the relationship of thermal conductivity is higher in the order of the second housing portion 22, the first housing portion 21, and the third housing portion 23, the thermal conductivity of the first housing portion 21 is 0.3 to 0.3 to The range of 3.0 W / (m · K) is preferable. However, considering moldability, up to 1.0 W / (m · K) is desirable. The thermal conductivity of the third housing portion 23 is preferably in the range of 0.15 to 0.3 W / (m · K).

When the relationship of thermal conductivity is higher in the order of the second housing portion 22, the third housing portion 23, and the first housing portion 21, the thermal conductivity of the first housing portion 21 is 0.15. The range of ~ 0.3 W / (m · K) is preferable. The thermal conductivity of the third housing portion 23 is preferably in the range of 0.3 to 3.0 W / (m · K). However, considering moldability, up to 1.0 W / (m · K) is desirable.

The first housing portion 21 and the third housing portion 23 are each formed by mixing a filler with a resin material, and are set to a predetermined thermal conductivity according to the density of the filler.

On one end side of the housing 11, the first housing portion 21 and the second housing portion 22 are projected from the third housing portion 23, and one end side of the second housing portion 22 is exposed. .. An arrangement portion 25 for arranging the heat radiating plate 12 is formed on one end side of the second housing portion 22.

In the third housing portion 23, a boss 26 for screwing the heat radiating body 12 and the glove 15 arranged on one end side of the housing 11 and a lighting circuit 14 inserted from one end side of the housing 11 will be described later. A circuit board holding portion 27 for holding the circuit board 40 is formed.

A mounting portion 28 for mounting the feeding portion 16 is formed at the other end of the housing 11.

Further, the heat radiating plate 12 is formed of a metal material such as aluminum in a disk shape. In the heat radiating plate 12, the light emitting module 13 is arranged on one end side surface, and the periphery of the other end side surface is arranged on the arrangement portion 25 of the housing 11. The heat radiating plate 12 is formed with a groove 31 into which the boss 26 is inserted and arranged.

Further, the light emitting module 13 has a plurality of light emitting elements 34 and a substrate 35 on which these light emitting elements 34 are mounted. As the light emitting element 34, for example, an LED of an SMD (Surface Mount Device) package is used. As the light emitting element 34, a COB (Chip On Board) module may be used, or another light emitting element other than the LED, such as an organic EL, may be used. The substrate 35 is fastened and fixed to the heat radiating plate 12 by a plurality of screws 36, and is thermally coupled to the heat radiating plate 12.

Further, the lighting circuit 14 converts the AC power input from the power feeding unit 16 into a predetermined DC power and supplies it to the light emitting element 34 of the light emitting module 13. The lighting circuit 14 has a plurality of electronic components 39 constituting the lighting circuit 14 and a circuit board 40 on which these electronic components 39 are mounted. The circuit board 40 is inserted into the pair of circuit board holding portions 27 of the housing 11 from one end side of the housing 11. The connection line 41 is derived from the circuit board 40. The connection line 41 is electrically connected to the substrate 35 of the light emitting module 13. Then, the input unit for AC power of the lighting circuit 14 is electrically connected to the power supply unit 16, and the connection line 41 is electrically connected to the output unit for DC power.

Further, the glove 15 has light transmission and light diffusivity, and is formed in white by mixing a diffusing material in a synthetic resin such as polycarbonate. The glove 15 has a first glove portion 44 attached to one end side of the housing 11 and a second glove portion 45 attached to the first glove portion 44.

The glove 15 is formed in a shape similar to a sphere, and the first glove portion 44 and the second glove portion 45 are divided into one end side and the other end side of the glove 15 at the portion where the diameter dimension of the glove 15 is maximized. Has been done.

The first glove portion 44 is formed in a tubular shape opened on one end side and the other end side, and the other end side is attached to one end side of the housing 11 so as to be continuous with the shape of the outer shell portion of the housing 11. It is configured. On the other end side of the first glove portion 44, a mounting portion 47 attached to one end side of the housing 11 by a screw 46 is formed in an annular shape. The screw 46 is screwed to the boss 26 of the housing 11 through the mounting portion 47 and the groove portion 31 of the heat radiating plate 12, and the first glove portion 44, the heat radiating plate 12, and the housing 11 are fastened and fixed together. As a result, the peripheral portion of the heat radiating plate 12 is pressed against the second housing portion 22 of the housing 11, and the heat radiating plate 12 and the second housing portion 22 are thermally coupled.

The second glove portion 45 is formed in a dome shape with the other end side open and projecting toward one end side. The other end side of the second glove portion 45 is fixed to one end side of the first glove portion 44 by, for example, vibration welding.

Further, as the power feeding unit 16, for example, a base 50 that can be connected to a socket for a general lighting bulb such as E17 or E26 is used. The power feeding unit 16 is not limited to the base 50, and may be a pair of pins depending on the type of lamp.

Next, FIG. 4 shows a lighting device 60 using the lamp device 10. The illuminating device 60 is, for example, a downlight. The lighting device 60 has an instrument body 61, and a socket 62 and a reflector 63 are arranged in the instrument body 61. In the socket 62, the base 50 of the lamp device 10 is electrically connected to supply AC power to the lamp device 10.

Then, when the lamp device 10 is attached to the socket 62 of the lighting device 60 and AC power is supplied to the lamp device 10, the lighting circuit 14 converts the AC power into a predetermined DC power and supplies it to the light emitting module 13 to supply the light emitting element. 34 emits light. The light from the light emitting element 34 passes through the globe 15 and is emitted in a predetermined light distribution direction.

The heat generated when the light emitting element 34 emits light is mainly transmitted to the heat radiating plate 12, the second housing portion 22, and the first housing portion 21 in this order, and is transferred from the surface of the first housing portion 21 to the outside air. Heat is dissipated.

At this time, the housing 11 has different thermal conductivity of the first housing portion 21, the second housing portion 22, and the third housing portion 23, and the heat of the second housing portion 22 is different. It has the highest conductivity relationship.

When the relationship of thermal conductivity is higher in the order of the second housing portion 22, the first housing portion 21, and the third housing portion 23, the heat conductivity is transmitted from the light emitting module 13 to the second housing portion 22. The heat can be efficiently transferred to the first housing portion 21, and the heat dissipation of the heat generated by the light emitting module 13 can be improved. Further, the third housing portion 23 can insulate the second housing portion 22 and the lighting circuit 14 from which heat is transferred from the light emitting module 13. As a result, the temperature of the lighting circuit 14 is almost affected only by its own temperature, so that it is possible to easily control the current and the like.

When the relationship of thermal conductivity is higher in the order of the second housing portion 22, the third housing portion 23, and the first housing portion 21, the heat generated by the lighting circuit 14 is transferred to the third housing portion. The heat generated by the lighting circuit 14 can be efficiently dissipated from the unit 23 to the second housing unit 22, and the heat effect of the lighting circuit 14 can be reduced. That is, it is a particularly effective configuration in a circuit configuration in which temperature conditions are severe, such as a dimming power supply.

When the relationship of thermal conductivity is increased in the order of the second housing portion 22, the third housing portion 23, and the first housing portion 21, the third housing portion 23 to the second housing portion 23 to the second. In order to efficiently transfer heat to the housing portion 22, for example, the inner surface of the second housing portion 22 is subjected to, for example, alumite processing or blasting, and the second housing portion 22 and the third housing portion 23 are combined. It is preferable to increase the adhesion of.

Then, in the lamp device 10 of the present embodiment, the first housing portion 21, the second housing portion 22, and the third housing portion 23 are integrally formed by insert molding to form the housing 11. Therefore, when assembling the lamp device 10, the number of parts is small, the assembly man-hours can be reduced, and the assembling property can be improved. Moreover, as described above, the thermal influence of the lighting circuit 14 can be reduced.
Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

10 Lamp device
11 housing
13 Luminous module
14 Lighting circuit
16 Power supply
20 cavities
21 First housing
22 Second housing
23 Third housing
60 Lighting equipment
62 socket

Claims (3)

A tubular and insulating first housing portion that opens to one end side and the other end side inside, and a flat arrangement portion located inside the first housing portion and on the one end side. A housing in which a second housing portion made of a metal material formed in the circumferential direction and a part inside the second housing portion are covered, and a third housing portion made of resin is integrally formed by insert molding. With the body;
With a heat radiating plate in which a light emitting module is arranged on one end side surface and a peripheral surface on the other end side is arranged in the arrangement portion of the housing;
With the power feeding unit arranged on the other end side of the housing;
With the lighting circuit arranged in the housing;
In the lamp device having
The arrangement portion is exposed from the first housing and the third housing, and the heat radiating plate is inserted from one end side of the housing and screwed from one end side of the housing by a screw. , lamp unit and the other end side surface of the heat radiating plate is pressed toward the other end direction from the top of the flat-shaped arrangement of the metal casing. The lamp device according to claim 1, wherein the outer diameter of the heat radiating plate is smaller than the outer diameter of the metal housing portion. With socket;
The lamp device according to claim 1 or 2, wherein the power feeding unit is mounted on the socket;
A lighting device characterized by comprising.

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