JP2014002897A - Lamp with ferrule and lighting fixture - Google Patents

Abstract

A lamp with a cap capable of efficiently dissipating heat generated from a lighting device, and a lighting fixture using the lamp with the cap.
A lamp with a cap 10 includes a main body 12 having thermal conductivity, an insulating case 13 having electrical insulation, a circuit board 14a, and a cap member 16. The main body 12 is provided with a solid light emitting element 11 on one end portion side, and has a cylindrical storage portion 12c having two or more plane portions f and f having an inner peripheral surface. The insulating case 13 is housed in the housing portion, and is configured by a cylindrical body having two or more plane portions f ′ and f ′ whose outer peripheral surface is in contact with the plane portion of the housing portion. The circuit board 14a is provided with electronic components constituting the lighting device 14 for a solid state light emitting device, and is provided inside the insulating case. The base member 16 is disposed on the other end side of the main body.
[Selection] Figure 1

Description

  Embodiments described herein relate generally to a lamp with a base and a lighting fixture that use a solid light emitting element such as a light emitting diode as a light source.

  Conventionally, in a lamp with a cap such as a light bulb shaped LED lamp that uses a light emitting diode (hereinafter referred to as “LED”) as a solid light emitting element as a light source, in order to improve the light emission efficiency of the LED, Heat is dissipated from the body, which is a body, to the outside. At the same time, in the lighting device for controlling the lighting of the LED, the temperature of the electronic components constituting the lighting circuit may rise during lighting, causing deterioration of the components and the like, which may impair reliability, and heat generated from the lighting device. Heat is released from the main body.

JP 2010-129414 A

  However, in order to store the lighting device in the main body which is a metal casing, in order to achieve electrical insulation from the lighting device, a resin insulating case is stored in the main body, and the lighting device is stored in the insulating case. There is a need. In general, as shown in FIG. 3 (b), a housing portion 12c made of a cylindrical hole is formed inside the main body 12, and an insulating case 13 made of a cylindrical body is inserted into the housing portion. The circuit board 14a of the lighting device 14 is accommodated in the insulating case. And the circuit board 14a and the inner surface of the insulating case 13 are thermally connected by the heat conducting member 15, and the heat generated from the lighting device 14 is conducted from the insulating case 13 to the main body 12 and radiated to the outside.

  However, since the insulating case 13 and the storage portion 12c are formed of a cylindrical body, the distance between the flat circuit board 14a and the cylindrical insulating body 13 and the storage portion 12c is increased. For this reason, the usage-amount of the heat conductive member 15 for thermally connecting the circuit board 14a and the inner surface of the insulating case 13 is needed. In particular, the heat conductive member often uses an expensive silicone resin adhesive having excellent heat conductivity, which has been a factor in increasing costs. For this reason, in a lamp with a base that uses this type of solid light-emitting element as a light source, the distance between the circuit board 14a, the insulating case 13 and the storage portion 12c can be made short to reduce the amount of heat conduction member used. It has become an important issue.

  The present invention has been made in view of the above problems, and provides a lamp with a base capable of reducing the distance between a circuit board, an insulating case, and a storage portion, and a lighting fixture using the lamp with the base. It is something to try.

  The lamp with a cap in the embodiment of the present invention includes a main body having thermal conductivity, an insulating case having electrical insulation, a circuit board, and a cap member. The main body includes a solid-state light emitting element on one end side, and forms a cylindrical storage portion having an inner peripheral surface having two or more plane portions inside. The insulating case is configured by a cylindrical body that is housed in the housing portion and that has two or more plane portions whose outer peripheral surfaces are in contact with the plane portion of the housing portion. The circuit board is provided with electronic components constituting a lighting device for a solid state light emitting device, and is provided inside the insulating case. The base member is disposed on the other end side of the main body.

  According to the present embodiment, it is possible to provide a lamp with a base capable of reducing the distance between the circuit board, the insulating case, and the storage portion, and a lighting fixture using the lamp with the base.

The longitudinal cross-sectional view of the lamp | ramp with a base which is embodiment of this invention. The lamp | ramp with a nozzle | cap | die is similarly shown, (a) is a perspective view of an insulation case, (b) is a perspective view which partially shows the contact state of an insulation case and a storage part. In FIG. 2B, the heat dissipating fins on the outer periphery of the main body are omitted. The lamp | ramp with a nozzle | cap | die is similarly shown, (a) is sectional drawing which follows the aa line | wire of FIG. 1, (b) is a figure which shows the prior art example of the part corresponded to this (a) figure. In FIGS. 3A and 3B, the heat dissipating fins on the outer periphery of the main body are omitted. The longitudinal cross-sectional view which shows roughly the lighting fixture which similarly used the lamp | ramp with a base as a light source. Similarly, a modification of the lamp with cap is shown, (a) is a perspective view corresponding to FIG. 2 (b) showing the first modification, and (b) is equivalent to FIG. 3 (a) showing the second modification. (C) is sectional drawing equivalent to FIG. 3 (a) which shows the 3rd modification. 5A, 5B, and 5C, the heat dissipating fins on the outer periphery of the main body are omitted.

  Hereinafter, embodiments of a lamp with a cap and a lighting fixture using the lamp with a cap according to the present invention will be described. First, the structure of the lamp with cap is described.

  The lamp with cap of this embodiment is for a rated voltage of 100 V using an LED as a light source, and constitutes a lamp with a cap that can be replaced with an existing general incandescent lamp. As shown in FIG. The solid light-emitting element 11 is disposed on one end side, the main body 12 in which the storage part 12c is formed, the insulating case 13 stored in the storage part of the main body, and the electrons constituting the lighting device 14 of the solid light-emitting element 11 A globe provided with parts to cover the circuit board 14a disposed inside the insulating case 13, the base member 16 disposed on the other end side of the main body 12, and the light source portion A of the main body 12. 17 etc.

  In the present embodiment, the solid light emitting element 11 is composed of a plurality of LEDs having the same performance. In the present embodiment, it is composed of a high-luminance, high-power SMD (Surface Mount Device) type white LED that includes four blue LED chips and a yellow phosphor. The LED 11 transmits part of the blue light emitted from the blue LED chip to the yellow phosphor, converts the blue light into yellow light by the yellow phosphor, and the transmitted blue light and yellow light are mixed. And emits white light. The LED 11 may be a COB (Chip on Board) type constituted by a plurality of LED chips.

  Each LED 11 is configured by being mounted on a substrate 11a. The substrate 11a is made of a metal having good thermal conductivity, which is substantially disk-shaped aluminum in the present embodiment, and a copper foil with an electric insulating layer such as a silicone resin on the surface (upper surface in FIG. 1). A wiring pattern made up of, for example, is formed, and four LEDs 11 are mounted and arranged on the wiring pattern at substantially equal intervals so as to form a substantially concentric circle shape.

  Further, the substrate 11a is formed with a through hole 11b penetrating the wiring pattern and the electrical insulating layer. This through hole is a through hole through which an electric wire w for supplying power to each LED 11 is inserted from the back surface of the substrate 11a toward the front surface and connected to the connector 11c. An electrical insulating layer is formed on the back surface of the substrate 11a. As described above, the substrate 11 a on which each LED 11 is mounted is configured as a light source body having the optical axis x on the central axis of the circular substrate, and is disposed on one end side of the main body 12.

  The main body 12 is composed of a member having good thermal conductivity, which is aluminum in this embodiment, and has a substantially circular cross-sectional shape with respect to the axis yy, and is closed so that one end side has a large diameter. A support portion 12a having a flat surface for supporting the substrate 11a is formed on the closed surface side. The opening 12b is formed on the other end side so as to have a small diameter. And the outer peripheral surface of the main body 12 has a substantially conical tapered surface, the diameter of which gradually decreases from one large end to the other small end, and the appearance is a silhouette of a neck portion of a general incandescent light bulb. It is configured in an approximated shape.

  Further, inside the main body 12, a storage portion 12c formed of a cylindrical hole is integrally formed across the support portion 12a on one end side and the opening portion 12b on the other end side. The storage portion 12c is a cylindrical hole having two or more plane portions f and f whose inner peripheral surface is two or more. In this embodiment, as shown in FIG. 2B, the storage portion 12c is continuous at an angle c along the longitudinal direction. It is composed of two flat portions f and f, and is formed into a substantially fan-shaped shape in which a semirectangular shape and a semicircular shape in which a cross-sectional shape of a cylindrical hole is equally divided into two. In addition, the axial center of the cylindrical hole which comprises the accommodating part 12c is formed so that it may correspond with the axial center yy of the main body 12 substantially.

  The main body 12 having these configurations is configured such that the outer peripheral surface thereof is baked with acrylic and has an appearance such as metallic silver or white. The main body 12 has a function as a metal casing for dissipating the heat generated from the LED 11, so that a large number of heat radiation fins and a large number of uneven portions are integrally formed on the outer peripheral surface. It is good to comprise so that an area of an outer surface may be enlarged by giving a process etc. In the present embodiment, a large number of radiating fins 12d that project radially from one end of the outer peripheral surface to the other end are integrally formed.

  The main body 12 having the above-described configuration is processed, for example, by casting, forging, cutting, or the like, and is configured to be a thick metal casing having no internal cavity and a large heat capacity. At this time, the storage portion 12c is such that the flat plane portions f and f serve as heat transfer surfaces that come into contact with flat plane portions f ′ and f ′ of the insulating case 13 described later, and the heat transfer surfaces are flat. Since it is configured, it is possible to shorten the distance between a circuit board 14a, which will be described later, and the insulating case 13 and the storage portion 12c. At the same time, since this heat transfer surface can be formed in a straight line (planar), the design becomes easy, and the flatness of the heat transfer surface can be easily improved by machining such as cutting, and the contact portion of the heat transfer surface It becomes possible to improve the heat transfer performance in.

  In the main body 12 configured as described above, a substrate 11a on which each LED 11 is mounted is disposed on a flat support portion 12a formed on one end side. That is, the back side of the substrate 11a is brought into close contact with the flat support portion 12a through an insulating sheet or adhesive made of a silicone resin or an epoxy resin having thermal conductivity and electrical insulation, and fixing screws or the like. Support by means. Thereby, the optical axis x of the light source body consisting of each LED 11 and the substrate 11a substantially coincides with the axis yy of the main body 12, and the light source unit A having a substantially circular light emitting surface in plan view as a whole is configured. .

  Further, an insertion hole 12d is formed that penetrates substantially along the axis yy direction from the central portion of the support portion 12a toward the storage portion 12c. The insertion hole 12d is formed so as to communicate with the through hole 11b formed in the substrate 11a in order to insert the power supply wire w. Then, the insulating case 13 is inserted and fitted into the main body 12 in the storage portion 12c.

  The insulating case 13 is housed in the housing portion 12c of the main body 12 and is provided for electrical insulation between a circuit board 14a of the lighting device 14 described later and the aluminum main body 12, and is made of PBT (polybutylene). A cylindrical body having two or more plane portions f ′ and f ′ whose outer peripheral surface is in contact with the plane portions f and f of the storage portion 12c. As shown in FIGS. 2 (a) and 2 (b), a semi-rectangular shape which is composed of two plane portions f 'and f' which are continuous along the longitudinal direction at an angle c ', and the cross-sectional shape of the cylindrical body is divided into two equal parts. And a semicircular shape that is substantially continuous, that is, a shape that matches a shape of the inner surface of the storage portion 12 c of the main body 12. In addition, the axial center zz of the cylindrical body constituting the insulating case 13 is formed so as to substantially coincide with the axial center of the storage portion 12c, that is, the axial center yy of the main body 12.

  As shown in FIGS. 2 (b) and 3 (a), the insulating case 13 configured as described above matches the shape of the cylindrical body that is substantially fan-shaped with the shape of the housing portion 12c that is substantially fan-shaped. 12 is inserted into the storage portion 12c from the opening 12b below and fitted. The insulating case 13 and the storage portion 12c are fixed to the inner surface of the support portion 12a of the main body 12 by screws s1 (FIG. 1). The insulating case 13 may be fixed in the storage portion 12c by a fixing means such as an adhesive.

  At this time, the corner c ′ and the flat plane portions f ′ and f ′ of the insulating case 13 become heat transfer surfaces that come into close contact with the corner c and the flat plane portions f and f of the storage portion 12 c of the main body 12. Thus, since the heat transfer surface is a flat surface, the distance between the circuit board 14a, the insulating case 13 and the storage portion 12c can be shortened. Thereby, it becomes possible to reduce the usage-amount of the heat conductive member 15 mentioned later. At the same time, since the heat transfer surface can be formed in a straight line (planar), the design is facilitated, and the flatness of the heat transfer surface can be easily improved by processing such as resin molding in the insulating case 13. It becomes possible to improve the heat transfer performance in the contact part of a hot surface. As a result, by inserting and fitting the insulating case 13 into the storage portion 12c, the flat planar portions f ′ and f ′ of the insulating case 13 with respect to the inner surface composed of the flat planar portions f and f of the storage portion 12c. The outer surface made of the material comes into close contact with each other and can exhibit a good heat transfer effect.

  In this case, an adhesive made of silicone resin, epoxy resin or the like having good thermal conductivity, electrical insulation, and heat resistance is applied in advance to the outer surface of the insulating case 13 and the inner surface of the storage portion 12c so as to be fixed. By doing so, since the outer surface of the insulating case 13 and the inner surface of the storage portion 12c are fixed via an adhesive having good thermal conductivity, it becomes possible to more closely bond them together.

  At the same time, by inserting and fitting the insulating case 13 into the storage portion 12c, the inner surface of the storage portion 12c consisting of the flat plane portions f and f and the flat plane portions f ′ and f ′ of the insulation case 13 When the insulation case 13 is inserted and aligned, positioning when the insulation case 13 is inserted and rotation of the insulation case 13 with respect to the storage portion 12c are performed.

  Incidentally, as shown in FIG. 3B, when the storage portion 12c and the insulating case 13 are both formed of a cylindrical body as in the prior art, separate special positioning and rotation prevention structures must be provided. On the other hand, according to the present embodiment, the distance between the circuit board 14a, the insulating case 13 and the storage portion 12c is shortened, that is, the heat transfer surface is configured as a plane, and the storage portion 12c and the insulating case 13 It becomes possible to perform positioning and rotation prevention by utilizing a shape in which the cross-sectional shapes are both substantially fan-shaped, so that the configuration can be simplified and the cost can be reduced.

  In addition, as shown in FIG. 1, the insulating case 13 is integrally formed with a locking portion 13a that is located at a lower portion of the outer peripheral surface and protrudes so as to form a ring-shaped ridge. A portion that protrudes downward from the engaging portion is formed with a base attaching portion 13b integrally with the outer periphery being stepped. Further, a guide groove 13c is integrally formed on the inner surface of the insulating case 13 along the axial direction of the cylinder (FIG. 3A), and a circuit board 14a of the lighting device 14 to be described later is provided in the guide groove in the vertical direction. That is, it is fitted and supported substantially along the axis yy direction of the main body 12. The guide groove 13c is an axis zz of the insulating case 13 forming a cylindrical body, in other words, one side from the axis yy of the main body 12, in this embodiment, the corner c 'of the insulating case 13 and the flat plane portion f. The circuit board 14a is fitted in the longitudinal direction in the guide groove 13c formed so as to be offset toward the ′ and f ′ sides. As a result, the wide plate surface of the circuit board 14a is positioned and supported toward the corner c ′ and the flat plane portions f ′ and f ′ of the insulating case 13.

  As shown in FIG. 1, the circuit board 14a constitutes the lighting device 14 for each LED 11. The circuit board 14a is made of a glass epoxy material, is mounted with electronic components constituting the lighting circuit, and is a relatively large component 14b such as an electrolytic capacitor. Are concentrated on one surface, and a component 14c that generates heat relatively by a small chip component or a transistor is mounted on the other surface. The circuit board 14a on which the electronic components 14b and 14c are mounted is inserted into the guide groove 13c of the insulating case 13 in the vertical direction. At this time, the component 14c that generates heat relatively by a chip component, a transistor, or the like is located in a narrow space, that is, a space on the side where the corner c ′ of the insulating case 13 and the flat plane portions f ′ and f ′ exist, The large part 14b is inserted in a large space. When mounting the electronic component on the circuit board 14a, the component 14c, which is relatively heat generated by a transistor or the like, is positioned in advance so as to face the corner c ′ and the plane portions f ′ and f ′ of the insulating case 13. And implement it.

  Thus, when the circuit board 14a is housed in the insulating case 13, the insulating case 13 provides electrical insulation between the body 12 made of aluminum and the circuit board 14a, and at the same time, the component 14c automatically generates heat. Is positioned to face the corner c ′ of the insulating case 13 and the flat planar portions f ′ and f ′. In a state where the component 14c with heat generation and the corner c ′ and the plane portions f ′ and f ′ of the insulating case 13 face each other, the plate surface including the component 14c with heat generation of the circuit board 14a and the corner of the insulating case 13 The heat conducting member 15 is filled between c ′ and the plane portions f ′ and f ′ (FIG. 3A). In this embodiment, an adhesive made of silicone resin having thermal conductivity, electrical insulation and heat resistance is filled.

  At this time, the heat conducting member 15 may be filled toward the corner c ′ of the insulating case 13 and the flat plane portions f ′ and f ′. That is, what is necessary is just to fill the portion where the distance dimension between the circuit board 14a and the insulating case 13 and the storage portion 12c is short, and it is possible to reduce the amount of the adhesive such as expensive silicone resin used. This is also advantageous. Incidentally, conventionally, as shown in FIG. 3B, since the insulating case 13 and the storage portion 12c are both formed of a cylindrical body, the circuit board 14a made of a flat plate, the insulating case 13 made of a cylindrical body, and the storage case. The distance dimension with the part 12c becomes long, and it is necessary to fill the adhesive up to the back of the cylinder of the insulating case 13 (in the figure, the hatched portion located in the center), which increases the amount of adhesive used.

  Further, the circuit board 14a of the lighting device 14 is disposed in the vertical direction and offset, and is supported at a position closer to the corner c 'and the plane portions f' and f 'of the insulating case 13, so that the bonding is performed. The amount of the agent used can be further reduced. At the same time, the distance between the circuit board 14a, the insulating case 13 and the storage portion 12c is shortened so that the heat conduction path is shortened, and the heat of the lighting device 14 can be more effectively transmitted to the main body 12 side. become.

  Accordingly, the circuit board 14a, in particular, the component 14c that generates heat, and the corner c ′ and the flat plane portions f ′ and f ′ of the insulating case 13 are thermally connected by the heat conducting member 15 made of silicone resin. At the same time, the circuit board 14a itself is firmly fixed to the insulating case 13 with an adhesive to provide a lamp with a base that is electrically safe, highly reliable, and strong against vibrations. It becomes possible.

  Further, as shown in FIG. 1, the insulating case 13 has a base member 16 fitted on the outer peripheral surface of the base attaching portion 13 b protruding from the small-diameter opening 12 b on the other end side of the main body 12. Alternatively, it is fixed using a heat-resistant adhesive such as silicone resin or epoxy resin. Thereby, the external shape of the outer peripheral surface extending from the main body 12 to the base member 16 is configured to approximate a neck silhouette in a general incandescent lamp. In addition, the electric wire w for LED electric power feeding is connected to the output terminal of the circuit board 14a, and an input line (illustration omitted) is connected to an input terminal. The lighting circuit configured on the circuit board 14 a is configured to convert an AC voltage into a DC voltage and supply a constant DC current to each LED 11.

  The base member 16 is an Edison type E26 type, and includes a cylindrical shell portion 16a having a thread and an eyelet portion 16c provided on the top of the lower end of the shell portion via an insulating portion 16b. The opening portion of the shell portion 16a is fitted into the base attachment portion 13b of the insulating case 13 and is fixed by adhesion or caulking. As a result, the insulation case 13 provides electrical insulation between the main body 12 made of aluminum and the base member 16. An input line derived from an input terminal of the circuit board 14a is connected to the shell portion 16a and the eyelet portion 16c of the base member 16.

  As shown in FIG. 1, the globe 17 has translucency, for example, is composed of a material such as a thin resin such as glass or polycarbonate, and is transparent or light diffusive, such as milky white. As milky white, it is formed in a smooth spherical shape approximating the silhouette of the ball portion of a general incandescent bulb having an opening 17a at its end. The globe 17 is fitted with a stepped portion formed around the support portion 12a of the main body 12 so that the light emitting surface of the light source portion A of the main body 12 is covered, for example, a silicone resin or an epoxy resin. Fix with adhesive. As a result, each LED 11 and its charging part are covered and protected, and the outer peripheral surface shape of the main body 12 becomes an external shape that is substantially continuous integrally with the outer peripheral surface shape of the globe 17. The lamp is configured as a lamp 10 with a cap shape that approximates the silhouette of the entire incandescent bulb.

  Next, an assembly procedure of the lamp with cap 10 configured as described above will be described. First, the substantially fan-shaped shape of the insulating case 13 is positioned so as to match the substantially fan-shaped shape of the storage portion 12c, and the insulating case 13 is inserted and fitted into the storage portion 12c of the main body 12, and the screw s1 is used. Secure to the body 12. As a result, the corner c ′ and the flat plane portions f ′ and f ′ of the insulating case 13 and the corner c and the flat planes f and f of the storage portion 12c are in close contact with each other and fitted.

  Next, while passing the electric wire w pre-connected to the output terminal of the circuit board 14a from the opening on the upper end side of the insulating case 13 toward the insertion hole 12d formed in the support part 12a of the main body 12, the circuit board 14a is passed through. It is inserted vertically into the insulating case 13, and is fitted and supported along the guide groove 13c. At this time, the circuit board 14a is inserted in such a direction that the component 14c that generates heat faces the corner c ′ and the flat portions f ′ and f ′ of the insulating case 13. At this time, the tip end of the electric wire w drawn out from the insertion hole 12d of the main body 12 is drawn out from the through hole 11b of the substrate 11a on which the LED 11 is mounted.

  Next, a heat conductive member 15 made of an adhesive is injected and filled between the circuit board 14a in the insulating case 13 and the corners c ′ and the flat portions f ′ and f ′ of the insulating case 13. As a result, the plate surface of the circuit board 14a, including the component 14c with heat generation mounted on the circuit board 14a, and the corner c 'and the plane portions f' and f 'of the insulating case 13 are connected by the heat conducting member 15. . At this time, as described above, the adhesive constituting the heat conducting member 15 can be connected with a reduced amount of use.

  Next, the substrate 11a on which the LED 11 is mounted is placed on and closely adhered to the support portion 12a of the main body 12, and the surrounding area from the upper surface side (surface side) is fixed by using fixing means such as screws. At this time, the through hole 11b of the substrate 11a and the insertion hole 12d of the main body 12 are aligned and fixed. Thereby, the back surface of the board | substrate 11a and the flat surface of the support part 12a are closely_contact | adhered and fixed. Next, the electric wire w pulled out from the through hole 11b of the substrate 11a is bent to the surface side of the substrate 11a and connected to the connector 11c.

  Next, the input line led out from the input terminal of the circuit board 14a of the lighting device 14 is connected to the shell portion 16a and the eyelet portion 16c of the base member 16, and the opening of the shell portion 16a is connected to the insulating case 13 in the connected state. Is fitted into the base attachment portion 13b and fixed with an adhesive.

  Next, the glove 17 is prepared, and the opening end 17a of the glove is fitted into the step formed on the support part 12a of the main body 12 so as to cover the light source part A of the main body 12, and fixed with an adhesive.

  As a result, there is a bulb-type lamp 10 having a globe on one end side and an E26-type base on the other end side, and having an overall appearance similar to a silhouette of a general incandescent bulb. In addition, the assembly procedure of the lamp | ramp 10 with a nozzle | cap | die is not restricted above, Another assembly procedure may be sufficient.

  Next, the structure of the lighting fixture which uses the light bulb-shaped lamp 10 with the cap configured as described above as a light source will be described. As shown in FIG. 4, reference numeral 20 denotes an existing downlight type lighting fixture that is embedded in a ceiling surface X of a store or the like and uses a general incandescent bulb having an E26-type base as a light source, and has an opening 21a on the lower surface. It comprises a metal box-like instrument body 21, a metal reflector 22 fitted into the opening 21a, and a socket 23 into which an E26-type base of a general incandescent bulb can be screwed. . The reflector 22 is made of, for example, a metal plate such as stainless steel, and a socket 23 is installed at the center of the top plate of the reflector 22.

  In the existing lighting fixture 20 for a general incandescent bulb configured as described above, a bulb-type cap lamp 10 using the LED 11 as a light source is used instead of the incandescent bulb in order to save energy and prolong the life. That is, since the bulb-shaped lamp with the cap has the cap member 16 formed in the E26 shape, it can be directly inserted into the socket 23 for a general incandescent bulb of the lighting fixture. At this time, the main body 12 of the bulb-shaped lamp with cap 10 has a substantially conical tapered surface, and the appearance is configured to approximate the silhouette of the neck portion of the incandescent bulb. It can be smoothly inserted without hitting the reflector 22 and the like around the socket, and the application rate of the light bulb-shaped lamp with cap 10 to the existing lighting fixture is improved. As a result, an energy-saving downlight in which a light bulb-shaped lamp with a cap is installed using the LED 11 as a light source is configured. Of course, a new downlight may be configured in the same manner as described above.

  When power is applied to the downlight configured as described above, power is supplied from the socket 23 through the base member 16 of the lamp with base 10, the lighting device 14 is operated, and a DC voltage is output. This DC voltage is applied from the lighting device 14 to the LED 11, and a constant DC current is supplied to light the LED. Thereby, all the LEDs 11 are turned on simultaneously, and white light is emitted.

  At this time, since the four LEDs 11 are mounted on the surface of the substrate 11a at substantially equal intervals so as to be substantially concentric, light emitted from each LED 11 is directed toward the entire inner surface of the globe 17. Light is emitted almost uniformly and light is diffused by a milky white glove, and illumination with light distribution characteristics similar to those of a general incandescent bulb can be performed.

  In particular, when the light distribution of the bulb-shaped lamp with cap 10 serving as the light source approaches the light distribution of a general incandescent light bulb, the amount of light irradiated to the reflector 22 in the vicinity of the socket 23 arranged in the lighting fixture 20 increases. In addition, it is possible to obtain substantially the appliance characteristics as the optical design of the reflector 22 configured for a general incandescent bulb.

  Further, when the lamp with cap 10 is turned on, the electronic components of the lighting device 14, particularly the components 14c such as transistors, generate heat. The generated heat is transmitted to the corner c ′ and the flat portions f ′ and f ′ of the insulating case 13 through the heat conducting member 15 made of silicone resin, and further, the corner c ′ and the flat flat portion f of the insulating case 13. The corners c and the flat planes f and f of the storage portion 12c that are in close contact with and contact 'and f' are transmitted, and are radiated to the outside from the thick main body 12 made of aluminum through the radiation fins 12d.

 At this time, the heat transfer surfaces of the insulating case 13 and the storage portion 12c are formed into a flat planar shape, that is, the corner c ′ of the insulating case 13 and the flat flat portions f ′ and f ′ and the storage of the main body 12. The circuit board 14a is configured by the corner c of the part 12c and the flat planes f and f, the distance between the circuit board 14a and the insulating case 13 and the storage part 12c is shortened, and the amount of use of the heat conducting member 15 is reduced. Side heat can be effectively transmitted to the insulating case 13 and the main body 12 side.

  Further, the circuit board 14a of the lighting device 14 is disposed in the vertical direction and offset, and is located closer to the corner c ′ and the plane portions f ′ and f ′ of the insulating case 13, The heat on the circuit board 14a side can be transmitted to the insulating case 13 and the main body 12 side with less heat conduction loss. At the same time, the design of the heat transfer surface formed in a straight line is combined with the ease of design and processing, making it possible to ensure that both heat transfer surfaces are in close contact with each other without any gaps, resulting in heat transfer loss. The heat can be dissipated more efficiently and effectively.

  With these actions, the temperature rise of the electronic components in the lighting device 14 can be suppressed, and factors such as a circuit failure are removed, so that the reliability is further improved, and the lamp with the cap whose lifetime is suppressed is reduced. It becomes possible to provide a lighting fixture.

  At the same time, the temperature of each LED 11 rises and heat is generated. The heat is transmitted from the disk-shaped substrate 11a made of aluminum to the support portion 12a to which the substrate 11a is adhered and fixed, and is radiated to the outside from the main body 12 made of aluminum through the radiation fins 12d. At this time, since the substrate 11a and the main body 12 are made of aluminum having good thermal conductivity, heat generated by the LED 11 can be effectively radiated with reduced conduction loss. Thereby, the temperature rise and temperature unevenness of the LED 11 are prevented, the decrease in light emission efficiency is suppressed, the decrease in illuminance due to the decrease in luminous flux can be prevented, and at the same time, the life of the LED can be extended. Further, the weight can be reduced by aluminum.

  As described above, in the present embodiment, the flat planar portions f ′ and f ′ of the insulating case 13 and the flat planar portions f and f of the storage portion 12c are in close contact with each other. ) With respect to the flat portions f ′ and f ′ of the insulating case 13 and the flat portions f and f of the storage portion 12c, respectively, the protruding strip portions 18 and the concave portions that are arranged in the vertical direction, that is, in the mold drawing direction, respectively. The strip portion 19 is formed integrally, and the convex strip portion 18 and the concave strip portion 19 are fitted to each other, so that the contact area between the insulating case 13 and the storage portion 12c is increased, and more efficient. You may comprise so that a thermal radiation effect | action can be performed.

  Moreover, although the cross-sectional shape of the insulating case 13 and the accommodating part 12c was comprised so that it might become a substantially sector shape which has the angle | corners c and c ', as shown to FIG. The parts f ′, f ′ and f, f may be configured continuously by an R shape. Furthermore, as shown in FIG.5 (c), you may comprise the whole in the rectangular cross-sectional shape. According to this, the insulating case 13 and the storage part 12c can be brought into contact with each other by a flat plane part over substantially the entire periphery, and it becomes possible to perform a more efficient heat dissipation action.

  Further, in the present embodiment, the lamp with cap 10 is a light bulb shape (A shape or PS shape), a ball shape (G shape), a cylindrical shape (T shape), a reflex shape (R) that approximates the shape of a general incandescent light bulb. Shape), or a flat thin lamp using a GX53 base. Further, the present invention is not limited to a lamp with a cap approximated to the shape of an existing incandescent bulb, but can be applied to lamps with a cap having various other external shapes and uses. Furthermore, a globeless bulb-type lamp with a cap may be configured.

  The solid light-emitting element 11 is not limited to an LED, and a solid light-emitting element using an organic EL or a semiconductor laser as a light source is allowed. The solid light-emitting element is preferably configured to emit white light, but may be configured to be red, blue, green, or a combination of various colors depending on the use of the luminaire used.

  The substrate 11a is made of a metal having thermal conductivity and conductivity. In this embodiment, the substrate 11a is made of aluminum. However, the substrate 11a may be made of glass epoxy resin, ceramics, or the like that has no conductivity. In this case, it is possible to form the wiring pattern by omitting the formation of the electrical insulating layer on the one surface side of the substrate 11a, and to directly mount the LED 11, and to provide a lamp with a base that is more advantageous in terms of cost. Is possible. Further, the substrate 11a is formed in a disc shape, but may be a polygonal shape such as a quadrangle or a hexagon, or an elliptical shape, and all of them for obtaining a desired light distribution characteristic. Is acceptable.

  Further, in the present embodiment, the solid light emitting element 11 is disposed on the support portion 12a of the main body 12 via the substrate 11a. However, the substrate 11a is omitted, and the solid light emitting element is directly insulated from the support portion. You may comprise so that it may be supported and arrange | positioned by 12a. According to this configuration, the heat generated from the solid state light emitting device 11 can be directly transmitted to the support portion 12a, that is, the main body 11, and a more effective heat dissipation operation can be performed. Furthermore, it is possible to provide a lamp with a cap that is advantageous in terms of cost by omitting the substrate 11a.

  The main body 12 is preferably formed of a metal including at least one of aluminum (Al), copper (Cu), iron (Fe), and nickel (Ni) having good thermal conductivity. In addition, it may be made of an industrial material such as aluminum nitride (AlN) or silicone carbide (SiC), or may be made of a synthetic resin such as a high thermal conductive resin. Appearance shape can be applied to existing lighting fixtures by forming a shape that approximates the silhouette of the neck part of a general incandescent bulb so that the diameter gradually decreases from one end to the other. In this case, it is not a condition to approximate a general incandescent lamp, and the shape is not limited to a specific shape.

  The insulating case 13 is preferably PBT, for example, but may be composed of another synthetic resin such as acrylic or ABS. In addition, the shape of the cylindrical body is, for example, a lattice shape as long as it does not impair the electrical insulation in order to reduce material costs or improve the heat dissipation effect even if it has a cylindrical body with both ends opened or a bottomed cylindrical body. For example, it may be configured by a cylinder provided with other openings.

  The circuit board 14a constituting the lighting device 14 is preferably made of a non-metallic member such as a glass epoxy material, a paper phenol material, or a glass composite. However, in order to improve heat dissipation, a heat conductive material such as aluminum is used. It may be composed of a good metal or may be composed of ceramics. The circuit board 14a is preferably disposed in the housing portion 12c substantially along the axis yy direction of the main body 12 in order to achieve miniaturization, but here, the circuit board 14a is orthogonal to the axis yy. Even if it is a direction to do, it may be inclined and arranged. The internal state in which the circuit board 14a is disposed in the insulating case 13 may be airtight, or may be in communication with the outside by forming air holes or the like for heat dissipation or pressure relief. Further, the lighting device 14 may be configured to constitute a lighting circuit that converts an alternating voltage of 100 V into a direct voltage of about 24 V and supplies the converted light to the light emitting element. Furthermore, you may have the light control function for adjusting the solid light emitting element 11, a color control function, etc. Further, the circuit board 14 a may be entirely stored in the insulating case 13 or may be partially stored in the base member 16.

  The heat conducting member 15 is filled between the circuit board 14a of the lighting device 14 and the corner c 'of the insulating case 13 and the plane portions f' and f ', including this portion and the back side where the large component 14b is mounted. The circuit board 14a may be at least partially filled with the flat portions f ′ and f ′ of the insulating case 13 by the heat conducting member 15. . The heat conducting member 15 is preferably composed of, for example, an adhesive made of a synthetic resin such as a heat-resistant silicone resin, an epoxy resin or a urethane resin having a good thermal conductivity and electrical insulation. Not only these synthetic resins but also metals having good thermal conductivity such as aluminum and copper may be interposed between the circuit board 14a and the insulating case 13 and connected to each other. You may make it connect combining an agent.

  The base member 16 is preferably an Edison type E26 type, E17 type or the like which is most commonly used. In addition, the material is preferably made of metal as a whole, but it may be a resin base partially made of synthetic resin. Further, it may be a GX53 base used for a flat thin structure lamp, a base having a pin-shaped terminal used for a fluorescent lamp, or a base having an L-shaped terminal used for hook sealing. Is not limited.

  The globe 17 is a bulb having a G-shaped spherical shape, such as an A-shaped shape, a PS-shaped shape, or the like, which has the same external shape as a bulb for a general lighting bulb, such as an incandescent bulb, and a T-shape. , A globe having the same shape as the R-shaped valve or a similar shape that is substantially the same shape may be used. Further, the glove 17 is fixed to the one end side of the main body 12 with an adhesive, but may be configured to be detachable by means such as screw tightening. In addition, the globe 17 preferably constitutes an envelope that substantially seals the light-emitting portion. However, it is only necessary that the globe 17 be optically sealed rather than a condition that it is completely sealed. What formed the hole for ventilation etc. may be used.

  The lighting fixture 20 can be embedded in the ceiling, directly attached, suspended, or wall-mounted, and can be attached to the fixture body with a glove, shade, reflector, or the like as a light control body. Alternatively, a lamp with a cap serving as a light source may be exposed. Moreover, not only what attached the lamp | ramp with one nozzle | cap | die to the instrument main body, A plurality may be arrange | positioned. Furthermore, a large indoor / outdoor lighting apparatus for facilities / businesses such as an office may be configured.

  In FIG. 3 (b) showing the conventional example, the same parts as in FIG. 3 (a) are given the same reference numerals, and in FIG. 5 showing the modification, the same parts as those in FIGS. The detailed explanation was omitted. The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and various design changes can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Lamp with a base 11 Solid light emitting element 12 Main body 12c Storage part f, f Plane part 13 Insulating case f ', f' Plane part 14 Lighting device 14a Circuit board 14b, 14c Electronic component 15 Thermal conduction member 16 Base member 20 Lighting fixture 21 Instrument body 23 Socket

Claims (3)

A thermally conductive main body in which a solid-state light emitting element is disposed on one end side and a cylindrical housing portion having an inner peripheral surface having two or more plane portions is formed inside;
An insulating case having an electrical insulation property, which is housed in the housing portion and is formed of a cylindrical body having two or more plane portions whose outer peripheral surfaces are in contact with the plane portion of the housing portion;
A circuit board on which electronic components constituting a lighting device for a solid state light emitting device are disposed and disposed in an insulating case;
A base member disposed on the other end side of the main body;
A lamp with a base, characterized by comprising: The said main body and the said insulation case are thermally connected in the plane part, At least one part of the said circuit board is thermally connected with the plane part of the insulation case by the heat conductive member. A lamp with a cap according to 1. An instrument body provided with a socket;
A lamp with a cap according to claim 1 or 2 attached to a socket of the instrument body;
The lighting fixture characterized by comprising.

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