CN203215308U - Lamp provided with lamp holder and luminaire - Google Patents

Abstract

The utility model provides a lamp with a lamp base and a lighting appliance. A lamp with a lamp base, characterized in that it comprises: a light source part, including a solid light-emitting element; The radiation direction is protruded and set to guide the light from the light source part toward the direction opposite to the top; the light-transmitting covering member includes an opening part, and is set in a way to cover the light source part and the radiator, and the opening part The radiating part of the radiating body is exposed to the outside air; and the base member supplies power to the light source part. The utility model can improve the heat dissipation performance of the solid light-emitting element, and is similar to the light distribution characteristics of the existing light sources such as ordinary incandescent bulbs.

Description

Lamps and lighting fixtures with lamp bases

technical field

The embodiment of the utility model relates to a lamp with a lamp cap and a lighting appliance. the

Background technique

In recent years, bulb-shaped light-emitting diode (Light Emitting Diode, LED) lamps and other base lamps have been used as light sources for various lighting fixtures instead of incandescent bulbs. Light-emitting diodes, which are solid-state light-emitting elements with long life and low power consumption, are used as light sources. Such capped lamps using light-emitting diodes as light sources are designed to replace conventional incandescent bulbs in order to save energy and prolong the life of bulbs, and are required to have light distribution characteristics similar to those of ordinary incandescent bulbs. the

Prior art literature

Patent Documents

Patent Document 1: Japanese Patent Application Laid-Open No. 2008-034140

Patent Document 2: Japanese Patent Laid-Open No. 2008-204671

Utility model content

However, this type of lamp with a base uses a planar light-emitting module on which light-emitting diodes are installed as a light source. A light source part is arranged on one end side of the light source part, and a globe (globe) is provided so as to cover the light source part. Therefore, there may be a case where the light emitting part is concentrated only on the top side of the bulb, most of the emitted light is emitted from the top to the front side, and the amount of light decreases from the side to the back side of the bulb. On the other hand, in order to improve luminous efficiency, solid light-emitting elements such as light-emitting diodes used as light-emitting sources of the light source unit must efficiently emit heat generated during lighting. Therefore, in such a lamp with a base, it is important to improve the heat dissipation performance of the solid light-emitting element, and to achieve a light distribution characteristic similar to that of an ordinary incandescent bulb. the

One embodiment of the present utility model is completed in view of the above situation, and the purpose is to provide a lamp and lighting fixture with a lamp base, which can improve the heat dissipation performance of solid light-emitting elements, and have the same light distribution characteristics as conventional light sources such as ordinary incandescent bulbs. similar. the

A lamp with a lamp cap according to an embodiment of the present invention includes a light source part, the light source part includes a solid light emitting element, and a thermally conductive radiator arranges the light source part on the top to form a heat dissipation part, and the heat dissipation part is based on The means for guiding the light from the light source part in the direction opposite to the top is provided to protrude toward the radiation direction with respect to the optical axis. The light-transmitting covering member includes an open portion that exposes the heat dissipation portion of the heat dissipation body toward the outside air, and is provided to cover the light source portion and the heat dissipation body. The base member supplies power to the light source unit. the

In the lamp with a cap according to one embodiment of the present invention, the heat dissipation portion of the heat dissipation body includes a hollow portion communicating with outside air, and the outside air is allowed to circulate through the hollow portion. the

In the lamp with a base according to one embodiment of the present invention, the covering member is configured such that the light transmittance of the upper covering part is lower than that of the lower covering part, and the upper covering part covers the light source part. , the lower side covering part covers the radiator. the

In the lamp with a cap according to an embodiment of the present invention, the heat dissipation body includes the heat dissipation portion, and the heat dissipation portion is provided to protrude toward a radial direction substantially perpendicular to the base portion and the optical axis, and the heat dissipation portion The base portion is formed in a substantially disk shape. the

In the lamp with a cap according to one embodiment of the present invention, the heat dissipation portion includes plate-shaped heat dissipation fins. the

According to a lamp with a base according to an embodiment of the present invention, the heat sink is formed with a hollow portion, the hollow portion is continuous in a direction perpendicular to the optical axis, and the open portion on the side faces the The long side direction which is substantially parallel to the optical axis is open. the

In the lamp with a base according to one embodiment of the present invention, the hollow portion intersects at the center of the optical axes, and is a hollow with a small width and a long depth. the

According to a lamp with a base according to an embodiment of the present invention, the radiator includes a base plate, which is fixed so as to plug an open portion on the upper surface of the hollow portion perpendicular to the base plate, and the base plate holds the light source portion. , and formed in a substantially cross shape, the hollow part is formed by the heat dissipation fins. the

In the lamp with a base according to one embodiment of the present invention, space portions are formed between the heat dissipation fins by spaced apart by heat dissipation fins, and the direction of light from the light source portion is opposite to that of the top of the heat dissipation body. Guided in the direction, the upper and outer sides of the space are open. the

In the lamp with a base according to an embodiment of the present invention, the cover member further includes an upper cover member that reflects light emitted from the light source unit in an opposite direction and is disposed on the light source. upper part. the

A lighting fixture according to an embodiment of the present invention includes: a fixture body, which can be provided with a lamp holder; and a lamp with a lamp base, including: a light source part, including a solid light-emitting element; There is a heat dissipation part, which has thermal conductivity, and the heat dissipation part is provided to protrude in the radiation direction relative to the optical axis, so as to guide the light from the light source part in the direction opposite to the top; the translucent covering member includes an opening part is provided to cover the light source part and the heat dissipation body, and the opening part exposes the heat dissipation part of the heat dissipation body toward the outside air; and a lamp cap member provides the light source part with a power supply; and the lamp holder and the lamp cap member are installed. the

In the lighting fixture according to one embodiment of the present invention, the heat radiating portion of the heat radiating body includes a cavity communicating with outside air, and the outside air is circulated through the cavity. the

In the lighting fixture according to an embodiment of the present invention, the covering member is configured such that the light transmittance of the upper covering part is lower than that of the lower covering part, and the upper covering part covers the light source part. The lower side covering part covers the radiator. the

In the lighting fixture according to an embodiment of the present invention, the heat dissipation body includes the heat dissipation portion, and the heat dissipation portion is provided to protrude toward a radiation direction substantially perpendicular to the base portion and the optical axis, and the base portion It is configured to include a space portion inside and has a substantially disc shape. the

In the lighting fixture according to one embodiment of the present invention, the heat sink is formed with a hollow portion, and the hollow portion is continuous toward a direction perpendicular to the optical axis, and an open portion on the side thereof faces toward the optical axis. The long side direction with the axis substantially parallel is open. the

In the lighting fixture according to an embodiment of the present invention, the covering member further includes an upper covering member that reflects light emitted from the light source unit in an opposite direction and is disposed on an upper portion of the light source unit. . the

The effect of utility models

According to one embodiment, a lamp and a lighting fixture with a lamp base can be provided, which can improve the heat dissipation performance of a solid light-emitting element, and have similar light distribution characteristics to existing light sources such as ordinary incandescent bulbs. the

Description of drawings

1( a ) and FIG. 1( b ) show a lamp with a base as a first embodiment, FIG. 1( a ) is an exploded perspective view, and FIG. 1( b ) is a cross-sectional view of a light source unit. the

Fig. 2 is a longitudinal sectional view of the capped lamp as described above. the

Fig. 3 is a perspective view showing a perspective view of the lamp with the cap as described above. the

Fig. 4 (a) and Fig. 4 (b) show the luminaire that is equipped with the lamp with the cap of this embodiment as described above, and Fig. 4 (a) schematically shows that the down light (down light) is installed on the ceiling 4(b) is a cross-sectional view schematically showing a state in which a bracket (bracket) is installed on a wall surface. the

Fig. 5 (a) ~ Fig. 5 (c) show the modified example of the lamp with cap as mentioned above, Fig. 5 (a) is the perspective view that the lamp with cap of the first modified example is shown in perspective, Fig. 5 (b) 5( c ) is a cross-sectional view showing the opening of the cover member and the junction of fins in the third modification. the

Fig. 6 (a) and Fig. 6 (b) show the modified example of the lamp with cap as mentioned above, Fig. 6 (a) is the longitudinal sectional view of the lamp with cap of the 4th modified example, Fig. 6 (b) is to A perspective view of a lamp with a cap according to a fifth modified example shown in perspective. the

Fig. 7 is a cross-sectional view showing a modified example of the capped lamp including the light-diffusing lens as described above. the

Reference signs:

10: Lamp with lamp cap

11: Light source department

11a: Solid state light emitting device

11b, 131: light emitting module

11b1: wiring substrate

11c, 133: Substrate

11c1: connector

12: radiator

12a, 15a: Basal part

12b: heat dissipation part

12b1: cooling fins

12b2: Hollow part

12b3: end face

12b4: Adhesive part

13: Covering components

13a: Upper cover part

13a1, 13b1, 13b2, 16a, 16b, 21a: opening

13b3: Open Department

13b: Lower side cover part

14: lamp head component

14a: shell part

14b: Insulation part

14c: eyelet

Detailed ways

Hereinafter, embodiments of a lamp with a base and a lighting fixture will be described. the

Example 1

As shown in Fig. 1 (a), Fig. 1 (b) ~ Fig. 3, the present embodiment is to constitute the lamp 10 with lamp head of the bulb shape that can replace common incandescent bulb, comprise: light source part 11, comprise solid light-emitting element; The body 12 is equipped with the light source part 11 and has thermal conductivity; the translucent covering member 13 is provided to cover the light source part 11 and the radiator 12; the

As shown in FIG. 1( b ), the light source unit 11 includes: a light emitting module 11b on which a solid light emitting element 11a is arranged in a planar shape; and a substrate 11c on which the light emitting module is arranged. The solid light-emitting element 11a includes a light-emitting diode (hereinafter referred to as "LED") in this embodiment, including a plurality of LEDs with high brightness and high output. The plurality of LEDs include blue LED chips with the same performance. LED11a is mounted on the wiring board 11b1, and comprises the light emitting module 11b. the

The light emitting module 11b is comprised as follows. That is, the wiring board 11b1 includes a substantially square member with good thermal conductivity. In this embodiment, it includes a thin flat plate on which an insulating layer is formed on a substrate containing aluminum. In the central part, a bank with a substantially square inner surface is formed to form a relatively shallow square recess. In the recess, a plurality of LEDs 11a are mounted in a substantially matrix form using a chip on board (COB) technology ( blue LED chips), and then coating or filling the sealing member dispersed and mixed with yellow phosphor to form a light emitting module 11b in which LEDs 11a are arranged in a square and planar manner. The light-emitting module 11b transmits blue light emitted from the blue LED chip, and excites a yellow phosphor with the blue light to convert it into yellow light. The transmitted blue light is mixed with the yellow light to emit white light. the

The light emitting module 11 b configured as described above is arranged on the substrate 11 c to constitute the light source unit 11 . The substrate 11c also serves as a heat dissipation member and is a member with good thermal conductivity. In this embodiment, it is formed in a substantially cross shape by using relatively thick plate-shaped aluminum. The optical axis x-x is projected in the radial direction perpendicular to the center. The light-emitting module 11b is closely fixed to the intersecting flat central portion of the board 11c with fixing members such as screws, and heat generated by each LED 11a is transmitted from the wiring board 11b1 to the board 11c. Furthermore, the wiring substrate 11b1 may be integrally formed with the substrate 11c. In this case, the thermal conductivity becomes better and the heat dissipation becomes better. Thereby, the light source part 11 which arrange|positions so that LED11a which is a solid light emitting element may form a square surface shape is comprised. Furthermore, on the board|substrate 11c, the connector (connector) 11c1 connected to LED11a is provided. The light source unit 11 configured as described above is arranged on the top of the radiator 12 . the

In this embodiment, the radiator 12 includes a base portion 12a and a heat dissipation portion 12b, and the base portion 12a and the heat dissipation portion 12b are integrally formed of an aluminum plate, which is a metal having good thermal conductivity. The base part 12a is comprised in substantially disk shape, and contains the space part inside. The heat dissipation part 12b is arranged to protrude toward the radial direction with respect to the optical axis x-x, and in this embodiment includes four plate-shaped heat dissipation fins 12b1, and the four plate-shaped heat dissipation fins 12b1 are arranged along the The radiation direction perpendicular to the optical axis x-x, that is, is arranged at equal intervals at an angle of 90° around the optical axis. The heat dissipation fins 12b1 are formed by bending four aluminum-containing plates such that their corners are R-shaped at approximately right angles, and the back sides of the plates face each other with a small predetermined interval a. the

As a result, two continuous hollow portions 12b2 are formed: a hollow that is continuous in a direction perpendicular to the optical axis x-x, has a small width and a long depth, and has an open portion on the side facing the optical axis. x-x are open in the direction of the long sides approximately parallel to each other. The two continuous hollow portions 12b2 intersect at the center of the optical axis and are continuous. In addition, the open portion on the side of the hollow portion 12b2, that is, the shape in the longitudinal direction of the end surface 12b3 facing the outer periphery of the heat radiation fin 12b1 is formed by bending so as to be in line with the curved neck shape of the covering member 13 described later. The outer peripheral surface of the part is continuous, so that the appearance is configured in a shape similar to the outline (silhouette) of the neck part of an ordinary incandescent light bulb (FIG. 3). the

The radiating portion 12b thus constituted is formed by bending the lower ends of the radiating fins 12b1 outward to integrally form the bonding portion 12b4, and is bonded to the upper surface of the disc-shaped base portion 12a by welding or the like. It may also be integrally formed with the base part 12a. Thus, the radiating portion 12b of the heat radiating body 12 is configured to include the cavity portion 12b2 communicating with the outside air, and is configured in such a manner that the outside air flows through the cavity portion 12b2 in two directions perpendicular to the radiation direction, The orthogonal radiation directions are centered on the optical axis x-x. the

In addition, in the radiator 12 configured as described above, the above-mentioned light source part 11 is arranged on the top of the radiator part 12b. That is, the substrate 11c of the light source unit 11 formed in a cross shape is fitted in such a manner as to plug the open portion of the upper surface of the orthogonal hollow portion 12b2, and fixed by welding or the like. The hollow portion 12b2 dissipates heat Fins 12b1 are formed. Thus, the upper surface of the hollow portion 12b2 is blocked by the substrate 11c, and the light source portion 11 is disposed at the central portion of the substrate 11c, in other words, on the top of the radiator 12, and the axis of the radiator 12 is aligned with the optical axis of the light source portion 11. x-x are consistent. the

By constituting the light source part 11 and the radiator 12 as described above, four wide spaces S are formed between each of the four heat dissipation fins 12b1 by using the heat dissipation fins 12b1 to divide them into four equal parts. The upper and outer sides of the portion S are open. Through the space part S, the light from the light source part 11 can be hardly blocked by the thin radiator 12, and can be radiated toward the direction opposite to the top of the radiator 12, in other words, toward the side and back side of the bulb ( figure 2). the

The space part S is a space separated by the heat dissipation fins 12b1, and each space has its upper part curved in a parabolic shape toward the central part, and the opposite side of the light source part 11, that is, its lower part is also curved in a parabolic shape toward the central part. The curved shape of the space portion S is not limited to a parabolic shape, and may be other various curves, straight lines, or combinations of these lines. In addition, the shape of the space part S is preferably a shape in which the surface in contact with the side surface of the bulb is enlarged. the

Moreover, since it is formed in the shape gathered from the upper part to the lower part, the curved shape of the upper part is larger than the curved shape of the lower part. the

In addition, the partitioned space is not limited to quarters, and may not be equally divided. Moreover, the number of divisions may be divided into two, three, or more than three, and may not be divided, as long as it is appropriately set according to the heat to be released and the amount of light required. the

The light radiated from the light source part 11 is reflected by the cover member 13, and is guided through the space part S so that light may go around from the side surface of a bulb to the back side. At this time, the light radiated from the light source 11 and reflected by the cover member 13 can be almost uniformly distributed over the entire circumference of the side and back sides of the bulb without being blocked by the thin radiator 12 through the space S. through. the

Therefore, the larger the surface of the space portion S that is in contact with the side surface of the bulb, the greater the amount of light can be secured. Moreover, if the heat dissipation portion 12b is reduced symmetrically therewith, the amount of heat dissipation will be limited. It is preferable that the shape of the heat dissipation portion 12b be made into a shape that has a larger volume in the center and is formed smaller in the side portion of the bulb. Small volume. the

15 among the figure is holder (holder), is used for holding radiator 12, and supports and accommodates following lighting device 17, utilizes heat-resistant synthetic resin, is to utilize polybutylene terephthalate in this embodiment Polybutylene terephthalate (PBT) integrally forms the disk-shaped base part 15a and the holding part 15b. The size of the base part 15a is formed to fit into the space part of the base part 12a of the radiator 12, and the holding part 15b corresponds to the two hollow parts 12b2 respectively, along the radial direction perpendicular to the axis of the holder 15. Four holding pieces 15b1 are integrally formed, and the two hollow portions 12b2 are formed by four heat dissipation fins 12b1, and are arranged along a radial direction perpendicular to the optical axis x-x. The shape and size of the holding piece 15b1 are configured so as to be able to fit in the hollow portion 12b2. The upper surface of the holding piece 15b1 is integrally closed, and the inside is formed as a cavity so that a circuit board 17b of the lighting device 17 described later can be inserted. the

Furthermore, each holding piece 15b1 is inserted into the two hollow portions 12b2 of the heat sink 12 from the base portion 12a of the heat sink 12 and fitted into the hollow portions 12b2. At this time, the base portion 15 a of the holder 15 is fitted into the space portion of the base portion 12 a of the radiator 12 . Thus, the radiator 12 is held by the holding portion 15b from the inner surface side. Furthermore, the height at which the retaining piece 15b1 fits into the hollow portion 12b2 is set to a height approximately at the middle of the height of the hollow portion 12b2 so as not to block the hollow portion 12b2 communicating with the outside air ( FIG. 2 ). Furthermore, the holding sheet 15b1 and the hollow portion 12b2 may be bonded together by applying an adhesive including heat-resistant silicone resin, epoxy resin, or the like. the

In addition, an electric wire insertion portion 15b2 is formed on the integrally closed upper surface of the holding piece 15b1. The wire insertion portion 15b2 has a tubular shape with an elongated inner diameter, through which the wire w1 can be inserted, and is formed to integrally extend upward on the upper surface of the holding piece 15b1. In addition, it is configured such that the lower end of the tube communicates with the cavity of the holding piece 15b1, and the upper end of the tube passes through the cavity 12b2 of the heat dissipation portion 12b, and becomes a position facing the connector 11c1 provided on the substrate 11c of the light source portion. superior. The radiator 12 and the holder 15 constituted as described above fit and adhere the lower ends of the respective base portions 12a, 15a to the opening portion 16a of the connecting body 16 described below. the

The cover member 13 constitutes the lampshade as a lamp part in this embodiment, and is made of, for example, a material such as thin glass or synthetic resin, and is made of translucent resin such as transparent or light-diffusing milky white. The middle one contains milky white polycarbonate (polycarbonate, PC) resin. In addition, the covering member 13 of the present embodiment is configured by being divided into two parts, an upper covering part 13 a that mainly covers the light source part 11 , and a lower covering part 13 b to increase the light emitting area. , the lower side covering portion 13 b mainly covers the radiator 12 . The dividing line between the upper cover part 13a and the lower cover part 13b is divided into two by the line y-y, which is a line in the horizontal direction that roughly passes through the light source part 11 disposed on the top of the radiator 12. , in other words, is a line perpendicular to the optical axis x-x in the vicinity of the substantially largest diameter portion of the globe. the

As shown in FIG. 1( a ), the upper cover portion 13a has a substantially hemispherical shape and includes an opening 13a1 open downward. . The lower cover part 13b includes an opening 13b1 matching the opening 13a1 of the upper cover part 13a on the upper side, and an opening 13b2 having a smaller diameter on the lower side. It is formed in a shape that approximates the outline of the neck of an ordinary incandescent light bulb. Furthermore, the upper side cover portion 13a and the lower side cover portion 13b are integrated by bonding the abutting surfaces of the openings 13a1, 13b1 by means of ultrasonic welding or the like to form a lampshade. the

The upper side cover part 13a, the lower side cover part 13b, etc. which comprise the cover member 13 may be integrally molded from the beginning, or may be separate parts. Moreover, it is also possible to assemble the covering parts molded separately as in the above-mentioned embodiment. Moreover, the opening part 13b3 mentioned later may be provided in the lower side covering part 13b, and may be provided in the upper side covering part 13a. the

In addition, an open portion 13b3 is formed on the outer peripheral surface of the lower cover portion 13b for exposing the heat dissipation portion 12b of the heat dissipation body 12. The open portion 13b3 includes a long hole with an open lower end ( FIG. 1( a )). Four radiation directions are formed, and the four cooling fins 12b1 are arranged along the radiation direction perpendicular to the center of the optical axis x-x. Then, the end surface 12b3 of each heat radiation fin 12b1, that is, the side open portion of the hollow portion 12b2 is fitted into the open portion 13b3 including the long hole, so that the end surface 12b3 is exposed to the outside air. the

At this time, since the lower end of the long hole of the opening part 13b3 is opened, the end surface 12b3 of each heat dissipation fin 12b1 can be inserted through the opened part from below. Furthermore, the end face 12b3 of the heat radiation fin 12b1 is fitted into the seam of the opening 13b3 including the long hole, and adhesives such as transparent silicone resin or epoxy resin can also be coated and bonded to block the gap. seam. the

Thus, the end surfaces 12b3 of the heat dissipation fins 12b1 exposed from the openings 13b3 of the covering member 13 are continuous and integrated with the outer peripheral surface of the covering member 13, and as a whole, the appearance is configured to approximate the outline of the neck portion of an ordinary incandescent light bulb. shape (Figure 3). the

In addition, the cover member 13 is configured such that the light transmittance of the upper cover portion 13a that covers the light source portion 11 is lower than the light transmittance of the lower cover portion 13b that covers the light source portion 13b. Radiator 12. In this embodiment, by making the content of the light-diffusion agent in the upper side cover part 13a larger than the content of the light-diffusion agent in the lower side cover part 13b, it is comprised so that the light transmittance of the upper side cover part 13a may be lower than that of the lower side cover part 13a. The light transmittance of the covering part 13b. In the covering member 13 configured as described above, the opening 13 b 2 below the lower covering part 13 b is fitted and adhered to the opening 16 a of the connecting body 16 . the

As shown in FIG. 2, the connecting body 16 is made of heat-resistant synthetic resin. In this embodiment, polybutylene terephthalate (PBT) resin is used to form the following cylindrical shape, and the diameter of the outer peripheral surface is free. A generally conical tapered surface that gradually decreases from one end to the other end, so that the appearance is configured to approximate the contour near the lower end of the neck of an ordinary incandescent bulb. In a circular shape, a large-diameter opening 16a is formed above, a small-diameter opening 16b is formed below, and a storage recess 16c is formed inside. Next, the radiator 12 and the base portions 12a, 15a of the holder 15 are fitted into the upper opening 16a with a larger diameter, and bonded with a heat-resistant adhesive including silicone resin, epoxy resin, etc. combine. Then, the lower opening 13b2 of the covering member 13 is fitted so as to cover the radiator 12, and bonded with a heat-resistant adhesive including silicone resin, epoxy resin, or the like. And, the base member 14 is bonded to the lower opening 16b having a small diameter. Furthermore, the outer surface of the connecting body 16 is coated with metallic silver or white. the

Next, the base member 14 is an Edison type (Edison type) E26 type, including: a cylindrical shell (shell) portion 14a, containing a conductive metal including screw threads, including a copper plate in this embodiment; and an eyelet (eyelet). ) part 14c is provided on the top of the lower end of the housing part 14a via the insulating part 14b. The opening of the shell part 14a is embedded in the outer periphery of the opening 16b below the connecting body 16, and is bonded by riveting or a heat-resistant adhesive including silicone resin or epoxy resin, so that the aluminum-containing radiator 12 is electrically insulated from the base member 14 . the

The lighting device 17 includes, as shown in FIG. 1( a ) and FIG. 1( b ), a circuit component 17 a constituting a lighting circuit for each LED 11 a , and a circuit board 17 b on which the circuit component is mounted. The lighting circuit is configured to convert an AC voltage of 100V into a DC voltage of about 24V, and supply a constant current DC current to each LED 11a. The circuit substrate 17b includes glass epoxy material in a cross-shaped strip, and electronic components are mounted on one or both sides. It is inserted into the cavity of the holding piece 15b1, and the substantially lower half is arranged and supported in the housing recess 16c of the coupling body 16 (FIG. 2). The circuit board 17b may be bonded to the inner surface of the holding sheet 15b1 or the connecting body 16 using a thermally conductive adhesive such as silicone resin or epoxy resin. the

Next, the electric wire w1 inserted into the electric wire insertion part 15b2 of the holder 15 and connected to the connector 11c1 of the board|substrate 11c is connected to the output terminal of the circuit board 17b. Furthermore, an input line (not shown) connected to the cap member 14 is connected to the input terminal of the circuit board 17 b. Furthermore, the lighting device 17 is preferably built into the light bulb as described above, and is configured to directly replace an ordinary incandescent light bulb. However, such as a compact fluorescent lamp, the lighting device may also be additionally provided on the side of the appliance where the lamp is installed. For not built into the bulb side. the

Thus, a lightbulb-shaped lamp 10 with a cap is formed. Like an ordinary incandescent bulb, the lamp 10 with a cap includes a PS-shaped covering member 13 from the front side of the top to the periphery of the side surface. The covering member 13 is formed with The lampshade is to increase the luminous area, and an E26-type lamp cap member 14 is arranged on the other end side, and the overall appearance shape forms an appearance shape that is approximately the same as the overall outline of an ordinary incandescent bulb. the

Next, the operation of the capped lamp 10 configured as described above will be described. When power is supplied to the capped lamp 10 via the cap member 14 to turn it on, as shown in FIG. 2 , light is emitted from the square planar light emitting portion of the light source portion 11 . The radiated light A is radiated and transmitted through the inner surface of the upper cover portion 13a, and is mainly irradiated on the front side of the top. In addition, part of the light B is reflected from the side toward the back by the light diffusing agent of the upper cover portion 13a, passes through the lower cover portion 13b, and is radiated so that the light goes around from the side surface of the bulb to the back side. . At this time, four wide space parts S are formed in the radiator 12, and the upper and outer sides of the four space parts S are open, so the light emitted from the light source part 11 B is hardly blocked by the thin radiator 12, and can pass through substantially uniformly (so that substantially the entire side and rear sides of the bulb emit light) with respect to substantially the entire circumference of the side and rear sides of the bulb. the

In addition, the covering member 13 is configured so that the light transmittance of the upper covering part 13a is lower than that of the lower covering part 13a by making the content of the light-diffusing agent in the upper covering part 13a larger than that of the lower covering part 13b. Therefore, the light B reflected on the inner surface by the light diffusing agent of the upper cover part 13a increases, and conversely, the light A transmitted through the upper cover part 13a decreases. the

Then, the increased light B reflected on the inner surface passes through the lower cover portion 13b with high light transmittance, and is emitted so that the light goes around from the side surface of the bulb to the back side. In this way, combined with the effects of the four wide spaces S, that is, the light B is transmitted approximately uniformly to the side and back sides of the bulb, the light emitted from the bulb can be spread approximately uniformly over the entire surface of the covering member 13. Radiation, the entire surface of the bulb emits light approximately uniformly and can increase the light-emitting area, so that approximately the same light distribution characteristics as that of ordinary incandescent bulbs can be obtained. the

At the same time, when the capped lamp 10 is turned on, the temperature of the LED 11a rises to generate heat. The heat is transferred from the aluminum-containing wiring substrate 11b1 to the aluminum-containing substrate 11c, and then to the heat dissipation fins 12b1 of the aluminum-containing radiator 12 bonded to the substrate 11c. The heat transferred to the heat dissipation fins 12b1 is heat-exchanged with the outside air flowing in the hollow portion 12b2 formed by the heat dissipation fins 12b1 to dissipate heat to the outside. the

At this time, the hollow portion 12b2 includes two communicating hollow portions perpendicular to the radiation direction, and the external air is introduced from one end surface 12b3 forming the hollow portion, and comes into contact with the large-area plate surface of the heat-dissipating fin 12b1. For heat exchange, the heat-exchanged air is discharged to the outside from the other end surface 12b3 (arrow A in FIG. 3 ). The heat exchange effect is carried out simultaneously in the two orthogonal hollow portions 12b2 to effectively dissipate heat. Especially in the central part near the optical axis where the light source part is close and heat is easy to accumulate, since the two orthogonal hollow parts 12b2 intersect, heat exchange can be performed by the external air introduced from the two hollow parts 12b2, so it can For more effective heat dissipation. In addition, a wide space with a rhombic cross-section is formed at the center near the optical axis, enabling more efficient heat exchange. the

In addition, since the end surface 12b3 of the heat radiation fin 12b1 exposed from the cover member 13 is continuous and integrated with the outer peripheral surface of the cover member 13, as a whole, the external appearance is constituted in a shape similar to the outline of the neck portion of an ordinary incandescent bulb. As shown by arrow B in FIG. 3 , the external air will be guided and sucked into the hollow portion 12b2 along the curved inclination of the neck portion, so more external air can be introduced into the hollow portion for more effective heat dissipation. . The temperature rise of LED11a is suppressed by these effective heat dissipation actions. This is the use of the chimney effect (chimney effect) produced by the hollow part 12b2 with a small width and a long depth. The external air is continuously sucked in from one end face 12b3 and released from the other end face 12b3 continuously, so that it will be in the lighting process. Continuous heat exchange and continuous heat dissipation. the

Moreover, since the holding piece 15b1 of the holder 15 inserted into the circuit board 17b of the lighting device 17 is located at a height approximately in the middle of the hollow portion 12b2, the holding piece 15b1 is cooled by the outside air sucked into the hollow portion, and the built-in Since the circuit board 17b is also cooled, the temperature rise of the circuit component 17a can also be suppressed, and the reliability of the electronic component can also be improved. the

Next, the structure of the lighting fixture which uses the light bulb-shaped lamp 10 with a cap which is comprised as mentioned above as a light source is demonstrated. As shown in Fig. 4(a), 20 is a downlight-type existing lighting fixture, which is embedded in the ceiling surface X of a shop or the like, and is installed with an ordinary incandescent bulb including a lamp cap of the E26 type as a light source, including: The box-shaped appliance body 21 includes an opening 21a on the lower surface; a metal reflector 22 fitted into the opening 21a; and a lamp socket 23 that can be screwed into an E26-type cap of an ordinary incandescent bulb. The reflector 22 includes, for example, a metal plate such as stainless steel, and a socket 23 is provided at the center of the upper surface plate of the reflector 22 . the

In the conventional lighting fixture 20 for general incandescent light bulbs configured as described above, the above-mentioned light bulb-shaped lamp 10 with a cap using LED as a light source is installed instead of general incandescent light bulbs for energy saving and long life. That is, the light bulb-shaped lamp with a base has the base member 14 configured as an E26 type, so it can be directly inserted into the lamp socket 23 for a common incandescent light bulb of the lighting fixture 20. the

Moreover, the appearance of the capped lamp 10 is configured in a shape similar to the outline of the neck portion of an ordinary incandescent light bulb, so the neck portion can be inserted smoothly without touching the reflector 22 around the lamp socket, so that the bulb shape The applicability of the lamp 10 with a lamp base to existing lighting fixtures is improved. Thus, the existing downlight can be easily converted into an energy-saving downlight provided with a bulb-shaped lamp 10 with a base using LED as a light source. Of course, not only the existing fixtures but also newly configured lighting fixtures can be configured in the same manner. the

Next, the operation of the downlight 20 using the capped lamp 10 configured as described above as a light source will be described. When power is turned on to the downlight configured as described above, commercial power is supplied from the socket 23 to the capped lamp 10 via the cap member 14, and the lighting device 17 operates to output a DC voltage of 24V. The said DC voltage is applied to each LED11a from the lighting device 17, and the DC current of a constant current is supplied, and all LEDs light up simultaneously and emit white light. the

The white light emitted from each LED 11a is emitted substantially uniformly over the entire surface of the covering member 13 as described above, and the light goes around from the side of the bulb to the back side without reducing the amount of light from the side to the back side of the bulb. This can increase the luminous area to obtain approximately the same light distribution characteristics as that of an ordinary incandescent light bulb, so the amount of light irradiated toward the reflector 22 near the lamp socket 23 disposed in the lighting fixture 20 increases. , it is possible to obtain device characteristics such as the optical design of the reflector 22, which is configured as an ordinary incandescent light bulb, so that lighting having substantially the same light distribution characteristics as that of an ordinary incandescent light bulb can be performed. the

At the same time, after the light bulb-shaped lamp 10 with a base is turned on, the temperature of the LED 11a rises to generate heat, but it can effectively dissipate heat through the heat dissipation fins 12b1 and the hollow portion 12b2 of the radiator 12 as described above, thereby suppressing the light emission of the LED. The decrease in efficiency keeps the brightness from decreasing for a long time, and the reliability of electronic components is also improved, so that long-life lighting fixtures can be provided. the

In addition, the lighting fixture is not limited to the downlight, and may be configured as a bracket-shaped lighting fixture installed on the wall surface X as shown in FIG. 4( b ). The bracket 20 includes a transparent shade 24 that opens upward, and the capped lamp 10 of this embodiment is installed facing upward through a lamp socket 23 . Thereby, the light from the capped lamp 10 can be radiated upward, sideways, and downward, and can be uniformly irradiated to a wall surface etc. FIG. Moreover, in the lamp 10 with a base, the light enters from the side surface of the bulb to the back side, and the amount of light does not decrease from the side surface of the bulb to the back side, so it is possible to provide a lighting system that can effectively utilize the brightness in the horizontal direction in particular. Bracket-shaped lighting fixtures. the

As above, according to this embodiment, a lamp with a base and a lighting fixture can be provided, which can improve the heat dissipation performance of LEDs, and have similar light distribution characteristics to conventional light sources such as ordinary incandescent bulbs, and can also exert the following effects. the

According to the present embodiment, since the covering member 13 is divided into two at the maximum diameter portion, the diameter of the heat sink 12 can be made larger until it reaches approximately the maximum diameter portion, and the area of the heat dissipation fins 12b1 can be enlarged. , for more effective heat dissipation. Furthermore, the covering member 13 may not be divided into two at the largest diameter portion, but may be divided into two in the longitudinal direction along the optical axis x-x. At this time, the diameter of the radiator 12 may be enlarged up to substantially the largest diameter portion of the covering member 13 . Moreover, according to the above structure, not only the area of the heat radiation fins 12b1 can be enlarged, but also the size of the light source unit 11 can be made larger, so that a lamp with a cap having a higher output can also be configured. the

In addition, the radiator 12 utilizes an aluminum plate to form the cavity 12b2 to effectively dissipate heat, so that the weight of the light bulb can be reduced. In particular, in this embodiment, the heat radiation of the LED can be performed without using a main body case including thick aluminum or the like, so that the weight can be further reduced, and it is also advantageous to reduce the cost. Furthermore, the cover member 13 is formed with an open portion 13b3 for exposing the heat dissipation fins 12b1, and outside air can also be introduced into the cover member 13, so that the temperature rise of the cover member 13 can also be suppressed, even after the light is turned off, etc. The bulb is not hot when touched by hand, so the bulb can be easily operated. In this case, when the opening portion 13b3 and the end surface 12b3 of the heat radiation fin 12b1 are bonded together with an adhesive such as silicone resin having good thermal conductivity, the heat of the covering member 13 can be released through the heat radiation fin 12b1. the

In addition, since two hollow portions 12b2 are formed along the radial direction perpendicular to each other, the air flow path for heat dissipation is arranged perpendicular to the longitudinal direction of the cover member 13, so that no matter which direction the lamp with the cap is installed, The external air can be introduced from the whole circumference of the bulb. Moreover, especially when the bulb is installed in the horizontal direction, no matter where the bulb is installed in the direction of rotation, any one of the cavities can be positioned approximately up and down, and the outside air can be sucked in from below through the chimney effect. And release from above, can carry out heat dissipation effect more effectively. the

As mentioned above, in this embodiment, the radiator 12 is formed with two hollow portions 12b2 along the radial direction perpendicular to it, but in the case of a lamp with a base with a low output, etc., one hollow portion may be formed along the radial direction. . In addition, in the case of a higher output capped lamp, the number of cavities along the radiation direction may be increased, such as three or four. In addition, it is also possible to form a plurality of protrusions or pins on the surface of the heat dissipation fin 12b1 to further increase the surface area. the

In addition, as shown in FIG. 5( a ), instead of connecting the hollow portion 12 b 2 in the radial direction, a hollow portion communicating in the radial direction from the optical axis x-x may be formed. In this case, the end surface 12b3 of the heat radiation fin 12b1 may protrude outward from the opening 13b3 of the covering member 13 so as to take in outside air from a direction (up-down direction) substantially parallel to the optical axis x-x. the

In addition, the hollow part 12b2 is formed with a side open portion, that is, the end surface 12b3 is formed to open toward the longitudinal direction substantially parallel to the optical axis x-x, but it may also be formed along the direction of the optical axis x-x as shown in FIG. 5(b). The generally orthogonal directions form laterally longer open portions. As a result, the open portion is formed in a horizontal-striped pattern on the outer surface of the cover member 13 , and a lamp with a base having a better appearance can be configured. the

And, the open portion 13b3 of the covering member 13 and the end surface 12b3 of the heat dissipation fin 12b1 can also be shown in FIG. A seam with the opening 13b3. At this time, the joints may be bonded with an adhesive such as silicone resin, which is transparent and has good thermal conductivity. Furthermore, the joint between the opening portion 13b3 and the end surface 12b3 of the heat radiation fin 12b1 is formed on the same plane, but as shown in FIG. The side is recessed and set. Thereby, outside air can be taken into the covering member 13 more efficiently. the

And, as shown in Fig. 6 (b), also can be constituted in the following manner: constitute radiator 12, described radiator 12 comprises the relatively thicker aluminum of board wall, forms a plurality of radiator fins 12b1 on its outer surface, makes The heat dissipation fins 12b1 are exposed to the outside air from the opening 13b3 of the covering member. the

Moreover, although the cover member 13 is divided and comprised, it may form integrally by vacuum molding etc., and may change the preparation of a light-diffusion agent etc. to an upper side and a lower side. In addition, the covering member 13 may also be constructed in such a way that the thickness of the upper covering part 13a is formed thicker, and the thickness of the lower covering part 13b is formed thinner by using the same material as an integral body or as a separate body. Change light transmittance. The light transmittance can also be set by changing the preparation of wavelength converting members such as phosphors. Furthermore, the covering member 13 is formed of PC resin, but may be formed of acrylic resin. It is also possible to form the cover member 13 using glass. The concentration of the light-diffusing agent coated on the inner surface of the glass is changed so that the transmittance has a gradient, which can increase the reflectance toward the desired direction by increasing the desired position. In addition, it can also be comprised using the ceramics which have translucency. In this case, the thermal conductivity of the ceramic is relatively good, so that the temperature rise of the covering member itself can be suppressed, and the heat of the LED can also be released from the covering member, thereby providing a lamp with a base with better operability and better heat dissipation. As mentioned above, in FIGS. 5-6 which show a modification, the same code|symbol is attached|subjected to the same part as FIG. 1-4, and detailed description is abbreviate|omitted. the

In addition, a light-diffusing lens as shown in FIG. 7 may also be provided. The luminosity of the light-diffusing lens in the direction of the optical axis and the direction intersecting the direction of the optical axis are both high, and wide-angle light distribution characteristics can be obtained. In FIG. 7 , the lens 114 includes a first lens portion 146 and a second lens portion 148 formed integrally. The first lens portion 146 is formed in a hemispherical shell shape and includes a first concave portion 145 opening toward one of the optical axis directions in which light from the surface light source 134 is incident. The second lens portion 148 is formed in a hemispherical shell shape and includes a second concave portion 147 that opens toward the other direction of the optical axis direction. the

And, lens 114 is to utilize transparent resin such as polycarbonate (polycarbonate) of refractive index 1.45～1.6 to form a whole, comprises: lens body 143, is opposite to surface light source 134, controls the light from surface light source 134; With respect to the mounting feet 144 , the lens body 143 is mounted on the light source unit 113 . the

The lens body 143 includes: a hemispherical shell-shaped first lens portion 146, including a first concave portion 145, and the first concave portion 145 faces one of the directions of the optical axis where the light from the surface light source 134 is incident, that is, the other direction of the lamp axis. one end side opening; and a hemispherical shell-shaped second lens portion 148 including a second concave portion 147 that opens toward the other side in the optical axis direction, that is, one end side in the lamp axis direction; and is formed in the following shape, That is, one end side of the first lens portion 146 in the lamp axis direction and the other end side of the second lens portion 148 in the lamp axis direction face each other and are integrated. the

Each concave portion 145, 147 of each lens portion 146, 148 includes an ellipsoidal surface of revolution comprising a perfect sphere and an ellipsoid, and the outer surface of each lens portion 146, 148 includes an ellipsoidal surface of revolution, and the ellipsoidal surface of revolution is formed to be aligned with each concave portion 145. , 147 similar shapes. On the other end side of the first lens portion 146 , except for the pair of attachment legs 144 , a groove-shaped retreat portion 149 is formed, which is away from the surface light source 134 . the

At the connection site between the outer surface of the first lens part 146 and the outer surface of the second lens part 148, a continuous part 150 is formed, and the continuous part 150 is to make the outer surface of the first lens part 146 and the second lens part The outer surface of 148 is continuous. The continuous portion 150 is configured as a flat surface, a curved surface, or a combination of a flat surface and a curved surface to be smoothly continuous so that the intersection of the outer surface of the first lens portion 146 and the outer surface of the second lens portion 148 does not form an acute angle. the

Furthermore, the curvature of each concave portion 145,147 of each lens portion 146,148 and the outer surface of the spheroidal surface, the position of each lens portion 146,148 in the lamp axis direction, the shape and size of the continuous portion 50, etc., can be determined according to the needs. Appropriately set the light distribution. the

Each mounting leg 144 protrudes from a position symmetrical to the center of the lens 114 toward the side intersecting the lamp axis direction on the other end side of the first lens portion 146 in the axial direction, and is attached to the substrate 133 of the light emitting module 131 in contact with it. on one side. A substantially L-shaped locking portion 151 protrudes from the front end of each mounting leg 144 . The locking portion 151 protrudes toward the other end in the direction of the lamp axis and is embedded in the outer surface of the lens mounting portion 139 of the heat sink 132 . A claw portion 152 is formed at the front end of the locking portion 151 , and the claw portion 152 is hung on the other surface of the heat dissipation plate 132 . Furthermore, the locking portion 151 mounted on each mounting leg 144 of the light source unit 113 is accommodated in the groove portion 122 for lens mounting of the base body 112 . Moreover, one mounting foot 144 has a wider width and is provided with two locking portions 151 , while the other mounting foot 144 has a narrower width and is provided with one locking portion 151 . The other mounting foot 144 is disposed on the side of the connector of the light emitting module 131 , so its width is narrowed to prevent interference with the connector. the

Furthermore, the lens body 143 of the lens 114 may also contain glass material. In this case, the mounting leg 144 may be formed as a separate body and have a structure for holding the lens main body 143 . the

Since the details of the light-diffusing lens are described in Japanese Patent Application No. 2010-194975, the entire content thereof is incorporated herein by reference as a part of this specification. the

Moreover, in this embodiment, the lamp 10 with a cap can also be configured as a bulb shape (A shape or PS shape), a reflective type (R shape), a spherical shape (G shape), a cylinder, etc. shape (T shape), etc. In addition, the present invention is not limited to a lamp with a base having a shape similar to that of an ordinary incandescent light bulb, but can also be applied to lamps with a base having other various appearance shapes and uses. the

Furthermore, the solid light emitting element 11 a is not limited to a light emitting diode, and a solid light emitting element using an organic electroluminescence (EL) element or a semiconductor laser as a light emitting source may also be used. The solid-state light-emitting element is preferably composed of a plurality, and the required number is selected according to the purpose of lighting. For example, it can also be formed in the following manner: form four or so element groups, and form one or more groups. Group. In addition, it is also possible to include a solid light emitting element. The solid-state light-emitting element is preferably formed using COB technology, but it can also be formed as a surface mount device (Surface Mounted Devices, SMD) type. The solid state light-emitting element is preferably configured to emit white light, but it may also be configured to emit red, blue, green, etc., or a combination of various colors depending on the application of the lighting fixture used. the

The substrate 11c and the wiring substrate 11b1 contain aluminum having good thermal conductivity, but may also contain metals such as copper and stainless steel. In addition, for example, non-metallic members such as synthetic resins such as epoxy resins, glass epoxy materials, and paper phenol materials may be included. In addition, ceramics may also be contained. Moreover, the shape of the light-emitting portion of the LED 11a that is provided with the light source portion 11 in a planar shape can be circular, polygonal, hexagonal, etc. Obtain all shapes of the target light distribution characteristics. the

The radiator 12 contains aluminum having good thermal conductivity, but may also contain a metal containing at least one of copper (Cu), iron (Fe), and nickel (Ni). In addition to these, industrial materials such as aluminum nitride (AlN) and silicon carbide (SiC), and synthetic resins such as high thermal conductivity resins may also be contained. the

The lighting device 17 may also have a dimming function or a color adjustment function, and the dimming function is used for dimming the solid-state light-emitting element 11a. The whole lighting device may be housed and arranged in the radiator 12 , or part of it may be housed in the base member 14 . the

The cap member 14 may be any cap that can be mounted to a socket that mounts an ordinary incandescent light bulb, however, a cap of E26 type or E17 type or the like which is generally the most popular Edison type is preferable. Moreover, regarding the material, the entire lamp cap can be made of metal, or it can be a resin lamp cap, that is, a metal such as a copper plate is used to form an electrical connection part, and a synthetic resin is used to form other parts. In addition, it can also be a pin shape. The base of the terminal may be a base including an L-shaped terminal, and is not limited to a specific base. the

Moreover, in this embodiment, the lighting fixture can be a ceiling-embedded type, a direct installation type, a pendant type, and a wall surface installation type, etc., and a lampshade, a shade, a reflector, etc. can be installed in the fixture body as a light control device. The body lighting fixture may also be a lighting fixture in which a lamp with a base as a light source is exposed. Furthermore, not only one lamp with a base is attached to the appliance body, but a plurality of lamps with bases may be arranged. In addition, facilities such as offices and large-scale lighting fixtures for business use can also be configured. Above, the preferred embodiment of the present utility model has been described, but the present utility model is not limited to the above-mentioned embodiment, and various design changes can be made within the scope of not departing from the gist of the present utility model. Lamps, etc., the lamp with lamp base can replace the light source or compact fluorescent lamp containing the GX53 lamp base, and use LED as the light source. the

Claims (16)

1. A lamp with a lamp base, characterized in that it comprises: Light source part, including solid light emitting elements; The heat dissipation body is provided with a light source part at the top, and is formed with a heat dissipation part, which has thermal conductivity. guide in the direction; A light-transmitting covering member includes an opening part, and is arranged to cover the light source part and the heat dissipation body, and the opening part exposes the heat dissipation part of the heat dissipation body toward the outside air; and The cap member supplies power to the light source unit. the 2. The lamp with lamp base according to claim 1, characterized in that: The radiating portion of the heat radiating body is configured to include a cavity communicating with outside air, and the outside air is allowed to circulate through the cavity. the 3. The lamp with lamp base according to claim 1, characterized in that: The covering member is configured such that the light transmittance of an upper covering part that covers the light source part is lower than that of a lower covering part that covers the radiator. . the 4. The lamp with lamp base according to claim 1, characterized in that: The heat dissipation body includes the heat dissipation portion, and the heat dissipation portion protrudes toward a radial direction substantially perpendicular to the base portion and the optical axis, and the base portion is formed in a substantially disk shape. . the 5. The lamp with lamp base according to claim 4, characterized in that: The heat dissipation part includes plate-shaped heat dissipation fins. the 6. The lamp with lamp base according to claim 5, characterized in that: The radiator is formed with a hollow portion which is continuous in a direction perpendicular to the optical axis, and an open portion on a side of the hollow portion is opened in a longitudinal direction substantially parallel to the optical axis. the 7. The lamp with lamp base according to claim 6, characterized in that: The hollow part intersects at the center of the optical axes, and is a hollow with a small width and a long depth. the 8. The lamp with lamp base according to claim 6, characterized in that: The heat dissipation body includes a base plate, which is fixed so as to plug the open portion of the upper surface of the orthogonal hollow portion, the base plate holds the light source portion, and is formed in a substantially cross shape, and the hollow portion is formed by the heat dissipation fins. the 9. The lamp with lamp base according to claim 5, characterized in that: Between the heat dissipation fins, a space is formed by spaced apart by the heat dissipation fins, and the light from the light source is guided in a direction opposite to the top of the heat dissipation body. Above and outside the space Fang is open. the 10. The lamp with lamp base according to claim 1, characterized in that: The cover member further includes an upper cover member that reflects light emitted from the light source unit in an opposite direction and is disposed above the light source unit. the 11. A lighting appliance, characterized in that it comprises: the body of the appliance, which may be provided with a lamp holder; and A lamp with a cap, comprising: a light source part, including a solid light-emitting element; a heat sink, the light source part is arranged on the top, and a heat dissipation part is formed, which has thermal conductivity, and the heat dissipation part protrudes relative to the light axis radiation direction And set, to guide the light from the light source part toward the direction opposite to the top; the light-transmitting covering member includes an opening part, and is set in a manner to cover the light source part and the heat dissipation body, the The opening part is to expose the heat dissipation part of the heat dissipation body to the outside air; and the lamp cap member provides power to the light source part; and The lamp holder and the lamp cap member are installed. the 12. The lighting fixture according to claim 11, characterized in that: The radiating portion of the heat radiating body is configured to include a cavity communicating with outside air, and the outside air is allowed to circulate through the cavity. the 13. The lighting fixture according to claim 11, characterized in that: The covering member is configured such that the light transmittance of an upper covering part that covers the light source part is lower than that of a lower covering part that covers the radiator. . the 14. The lighting fixture according to claim 11, characterized in that: The radiating body includes the radiating part, and the radiating part is protruded toward a radiation direction substantially perpendicular to the base part and the optical axis, and the base part is configured to include a space part inside, and is approximately Disc shape. the 15. The lighting fixture according to claim 14, characterized in that: The radiator is formed with a hollow portion which is continuous in a direction perpendicular to the optical axis, and an open portion on a side of the hollow portion is opened in a longitudinal direction substantially parallel to the optical axis. the 16. The lighting fixture according to claim 11, characterized in that: The cover member further includes an upper cover member that reflects light emitted from the light source unit in an opposite direction and is disposed above the light source unit. the

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