JP2016066427A - Light emission device and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emission device that is not apt to thermally deteriorates and can be formed inexpensively to have simple constitution and wide light distribution, and a luminaire with the light emission device.SOLUTION: A light emission device 1 comprises: a light emission body 2 having a substrate 8 and a light emission element 9 mounted on the side of one surface 8a of the substrate 8; a casing 4 provided with a power supply part 26 at one end side 4a and with a substrate fitting part on the other end side 4b, the other surface side of the light emission body 2 being fitted to the substrate fitting part; and a cover body 6 having a translucent cover body part 35 fitted to the other end side 4b of the casing 4 to cover the light emission body 2, and a columnar or spindle-like projection part 36 extended from a top part 37 of the cover body part 35 to the side of the substrate 8 and provided inside the color body part 35 such that a tip side 36 thereof does not come into contact with the side of the one surface 8a of the substrate 8, a part of radiant light of the light emission body 2 being made incident from an end face 38 of the projection part 36 to be guided and emitted from an outer peripheral surface 36c of the projection part 36 and the top part 37 of the cover body part 35.SELECTED DRAWING: Figure 1

Description

Embodiments described herein relate generally to a light-emitting device using a light-emitting element as a light source, and a lighting fixture in which the light-emitting device is disposed.

For example, an LED bulb (light-emitting device) using an LED (light-emitting diode) as a light source has a light-emitting body (LED module) with an LED mounted on a substrate, a base disposed on one end side, and a light-emitting body mounted on the other end side. And a cover body (glove) attached to the other end of the casing so as to cover the lighting device housed in the casing and the light emitter.

And in order to obtain wide light distribution with respect to LED which has directivity in some LED light bulbs, the light-emitting body is equipped with the reflector and the lens, and has controlled the light of LED (for example, patent document 1). reference.). In addition, there is one in which a light guide is installed on the LED mounted on the substrate, the light of the LED is introduced into the light guide, diffused by transmitting and reflecting, and wide light distribution (for example, patent) Reference 2).

JP2013-20813A (6th page, Fig. 1) Japanese Patent Laying-Open No. 2012-234783 (page 3, FIG. 2)

If a light control means such as a reflector, a lens, or a light guide is provided on the light emitter, the number of parts increases and the structure on the light emitter side becomes complicated, leading to an increase in cost of the LED bulb. In addition, when the light control unit is in contact with the light emitter or the housing, heat generation occurs due to heat transfer, causing thermal degradation, and there is a possibility that problems such as a decrease in light emission efficiency due to discoloration or crack damage may occur.

An object of the present embodiment is to provide a light-emitting device that is less likely to be thermally deteriorated and that can be formed with a simple configuration with a wide light distribution and at low cost, and a lighting fixture including the light-emitting device.

The light emitting device according to the present embodiment includes a light emitter, a casing, and a cover body. The light emitter has a substrate and a light emitting element. The light emitting element is mounted on one side of the substrate. The casing is provided with a power feeding part on one end side and a substrate mounting part on the other end side. The other surface side of the light emitter is attached to the substrate attachment portion.

The cover body has a translucent cover main body portion and a protruding portion. A cover main-body part is attached to the other end side of a housing | casing so that a light-emitting body may be covered. The protrusion extends from the top of the cover main body to the substrate side of the light emitter, and is formed in a columnar or conical shape provided on the inner side of the cover main body so that the tip side does not contact one surface of the substrate. . And a cover body injects and guides a part of emitted light of a light-emitting body from the end surface of a protrusion part, and radiate | emits it from the outer peripheral surface of a protrusion part, and the top part of a cover main-body part.

According to the light emitting device of the present embodiment, the protrusion is provided so that the tip side does not contact the one surface side of the substrate. Therefore, the heat from the light emitter is not directly conducted, so that the temperature rise is suppressed and thermal degradation occurs. In addition, a part of the emitted light of the light emitting element is incident from the end surface of the protrusion of the cover body, guided through the protrusion, and emitted from the outer peripheral surface of the protrusion and the top of the cover body. The radiated light emitted from the top part of the main body part is less likely to cause a dark part on the top side of the cover main body part, and the radiated light emitted from the outer peripheral surface of the projecting part is emitted from the cover main body part to the housing side and is widely distributed. Expect to be light.

It is a schematic sectional side view of the light-emitting device which shows the 1st Embodiment of this invention. It is a schematic top view of the state which removed the cover body of the light-emitting device same as the above. It is a schematic sectional side view of the light-emitting device which shows the 2nd Embodiment of this invention. It is a partial notch schematic side view of the lighting fixture which shows the 3rd Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, a first embodiment of the present invention will be described.

The light emitting device 1 of this embodiment is, for example, an LED light bulb that is attached to and detached from a socket for a light bulb. As illustrated in FIG. 1, a light emitting body 2, a housing 4 having an attachment body 3, a lighting device 5, and a cover body 6 It is configured.

The light emitter 2 is formed by having a substrate 8 and a plurality of LEDs 9 as light emitting elements. The substrate 8 is made of a metal plate having high thermal conductivity, for example, an aluminum (Al) plate having a thickness of 1.0 mm, and is formed in a disk as shown in FIG. An insulating layer (not shown) is formed on one surface 8a of the substrate 8, and a plurality of LEDs 9 are mounted on the insulating layer. In the present embodiment, one LED 9 is provided in the central portion 8 c of the substrate 8, and the remaining LEDs 9 are concentric with the central portion 8 c of the substrate 8, and are substantially equidistant along the circumferential direction of the substrate 8. It is provided as follows. Here, the center portion 8c includes the center on the one surface 8a side of the substrate 8, and means the vicinity around the center.

The plurality of LEDs 9 are connected in series by a wiring pattern (not shown) formed on the insulating layer and connected to a connector 11 provided on the insulating layer. The LEDs 9 connected in series are connected to the lighting device 5 by an output line 13 with a connector 12 electrically connected to the connector 11. The LED 9 is a package product, for example, one that emits white light.

On the insulating layer around the LED 9 and the connector 11, for example, a white resist 14 that insulates the wiring pattern or the like is applied. A plurality (three) of cutout portions 15 are formed on the outer peripheral edge 8d of the substrate 8 at regular intervals with respect to the central portion 8c, in this embodiment, at intervals of 120 °. The substrate 8 (light-emitting body 2) is fixed to the heat radiating plate 17 with screws 16 at the notch 15.

As shown in FIG. 1, the housing 4 is formed of an outer case 18 made of a metal material having a high thermal conductivity, such as aluminum (Al), and the attachment body 3 in this embodiment. The casing 4 as a whole is formed in a cylindrical shape of a substantially inverted truncated cone that gradually increases in diameter from the one end side 4a to the other end side 4b. The outer case 18 is provided with a boss 19 projecting inwardly on the other end side 4b. Three bosses 19 are formed at intervals of 120 ° in the circumferential direction. Moreover, the end surface 4d of the other end side 4b of the outer case 18 is formed in a plane. The outer case 18 is molded by aluminum die casting.

And the heat sink 17 is mounted on the end surface 4d of the housing | casing 4 (outer case 18). The heat radiating plate 17 is fixed to the end face 4d by an adhesive (not shown) such as a silicone adhesive. The heat radiating plate 17 is made of a relatively thick metal plate having high thermal conductivity, such as an aluminum plate, and is formed in a disk shape as shown in FIG. A surface 17 a of the heat radiating plate 17 serves as a substrate mounting surface 20 as a planar substrate mounting portion of the housing 4. The light emitter 2 is attached to the board attachment surface 20 with a plurality of screws 16. The light emitter 2 is attached so that the other surface side 8b (shown in FIG. 1) of the substrate 8 faces and closely contacts the substrate attachment surface 20.

In addition, for example, a rectangular insertion port 21 is formed on the heat radiating plate 17 on the outer peripheral edge 17d side. The output line 13 of the lighting device 5 is led out from the inside of the housing 4 to the board mounting surface 20 side from the insertion port 21, and the connector 12 of the output line 13 is connected to the connector 11 of the light emitter 2. Further, a cutout portion 23 through which a locking claw 22 of the cover body 6 described later is passed is formed on the outer peripheral edge 17d of the heat radiating plate 17. In the present embodiment, the notches 23 are formed at 90 ° intervals so as to be equally spaced in the outer circumferential direction. Further, as shown in FIG. 1, the heat radiating plate 17 has a large outer shape so as to form a locking groove 24 that locks the locking claw 22 of the cover body 6 with the outer case 18 of the housing 4. Is set. The outer case 18 may be formed of a resin or ceramic having a good thermal conductivity.

In the outer case 18, the attachment body 3 is inserted and attached from the other end side 4b. The attachment body 3 is formed in a cylindrical shape having an outer shape in which one end side 3 a is formed in a substantially cylindrical shape and the other end side 3 b is in close contact with the inner surface 18 c of the outer case 18. The attachment body 3 is formed of a synthetic resin having electrical insulation and high thermal conductivity, for example, polybutylene terephthalate (PBT) resin.

The mounting body 3 is formed with a ridge 25 spirally on the outer surface of one end side 3a (one end side 4a of the housing 4), and an E-shaped base 26 as a power feeding portion is screwed to the ridge 25. Are combined. The E-shaped base 26 is caulked and fixed to the outer surface of the one end side 3 a of the attachment body 3.

The E-shaped base 26 is, for example, an E26 type, and is a male screw portion 27 that is screwed and fixed to the ridge 25 and is fixed, an insulating portion 28 provided on the distal end side of the male screw portion 27, and the apex of the insulating portion 28. It has the top connection part 29 provided in this. The male screw portion 27 is made of, for example, aluminum (Al) and is formed in a substantially cylindrical shape having a bottom portion 27a, and the top connection portion 29 is made of, for example, brass, and is formed in a substantially cylindrical shape having a convex outer surface 29a. . The insulating portion 28 is made of, for example, glass or ceramic, is formed in a conical shape, is attached to the bottom portion 27a of the male screw portion 27, and is provided with a top connection portion 29 at the apex. The E-shaped base 26 is attached to the one end side 4 a of the housing 4 by attaching the male screw portion 27 to the attachment body 3.

The E-shaped base 26 fixes the outer case 18 to the attachment body 3. That is, between the outer case 18 and the E-shaped base 26, a ring body 30 fitted into one end side 3 a of the attachment body 3 is interposed. The ring body 30 is a rigid body having electrical insulation, and is formed of, for example, polybutylene terephthalate (PBT) resin.

The ring body 30 is pressed by the E-shaped base 26 as the male thread portion 27 of the E-shaped base 26 is screwed to the ridge 25 of the mounting body 3, and this pressing causes the outer case 18 to be encased on the outer surface of the mounting body 3. The body 4 is pressed so as to move from the one end side 4a to the other end side 4b. In the E-shaped base 26, the male thread portion 27 is screwed into the ridge 25 of the attachment body 3 until the outer case 18 cannot move. Thus, the outer case 18 is attached in close contact with the attachment body 3.

The outer case 18 is formed of, for example, aluminum (Al) having a high thermal conductivity, so that the heat generated in the light emitter 2 is quickly transferred and released from the outer surface 18d to the external space. If the outer case 18 is formed of a synthetic resin or ceramic having high thermal conductivity and electrical insulation, the mounting body 3 may be formed integrally with the outer case 18 to form the housing 4. .

Thus, the housing 4 is provided with an E-shaped base 26 as a power feeding portion on one end side 4a, and a substrate mounting surface 20 as a flat substrate mounting portion by a heat radiating plate 17 on the other end side 4b. The light emitter 2 is attached to the surface 20.

The lighting device 5 includes a circuit board 31 and various types of circuit components 32 mounted on the circuit board 31. The circuit board 31 is made of a synthetic resin plate such as a glass epoxy material, and extends from one end side 4a (one end side 3a of the attachment body 3) to the other end side 4b (the other end side 3b of the attachment body 3). It is formed in a shape and is arranged in a direction along the other end side 4 b from the one end side 4 a of the housing 4. On the inner surface 3c of the mounting body 3, a pair of substrate mounting grooves 33 and 33 (only one of them is shown in FIG. 1) are provided in a straight line from one end side 3a to the other end side 3b. Yes. Both ends of the circuit board 31 in the width direction are press-fitted and attached to the pair of board mounting grooves 33 and 33. The circuit board 31 is formed so as to increase in width as it goes from the one end side 31c to the other end side 31d, and the mounting area of the circuit component 32 is increased as much as possible in the housing 4 including the inside of the E-shaped base 29. The housing 4 is arranged in a direction along the other end side 4b from the one end side 4a.

The circuit board 31 has a circuit component 32 mounted on at least one surface 31a. The circuit component 32 includes a number of components such as a transformer, a capacitor, and a resistor. The circuit board 31 is provided with an input terminal (not shown) on one end side 31c and an output terminal (not shown) on the other end side 31d. Input lines 34 and 34 are connected to the input terminal, and output lines 13 and 13 are connected to the output terminal. The input lines 34 are connected to the top connection portion 29 and the male screw portion 27 of the E-shaped base 26. The output lines 13 and 13 are equipped with a connector 12, and the connector 12 is connected to the connector 11 of the light emitter 2.

And the lighting device 5 forms the lighting circuit which lights LED9 of the light-emitting body 2 by the circuit component 32, the wiring pattern not shown, etc. The lighting circuit is configured to convert an AC voltage to a predetermined DC voltage and supply a constant current to the LED 9 from the output terminal when an AC voltage (AC 100 V) of an external power source is applied to the input terminal.

The cover body 6 is provided on the other end side 4 b of the housing 4 so as to cover the light emitting body 2. The cover body 6 is made of a translucent resin material, for example, polycarbonate (PC) resin, and extends from a cover main body portion 35 attached to the other end side 4 b of the housing 4 and an inner surface 35 b of the cover main body portion 35. A protrusion 36 is provided. In the present embodiment, the cover main body portion 35 and the protruding portion 36 are integrally molded.

Note that the cover main body 35 may be transparent or may have a diffuse translucency such as milky white. In the latter case, the diffused light is radiated from the outer surface 35a of the cover main body 35 to the external space, so that there is an advantage that a wide light distribution described later can be easily obtained.

The cover main body portion 35 is formed in a substantially spherical shape so that the one end side 6 a is opened and the other end side 6 b is closed and the light emitter 2 is covered. That is, the other end side 6 b of the cover main body portion 35 is a top portion 37. The cover body portion 35 is provided with a locking claw 22 on one end side 6 a, and the locking claw 22 is locked to the locking groove 24 on the other end side 4 b of the housing 4 to attach to the housing 4. It is attached. In the present embodiment, four locking claws 22 are formed at equal intervals in the circumferential direction at the opening on one end side 6a of the cover main body 35. The cover body 6 is locked in the locking groove 24 by being rotated after the locking claw 22 is fitted in the notch 23 of the heat radiating plate 17.

The protruding portion 36 is provided inside the cover main body portion 35. That is, the projecting portion 36 extends from the inner surface 35 b of the top portion 37 of the cover main body portion 35 to the substrate 8 side of the light emitter 2. In the present embodiment, the projecting portion 36 is formed in a truncated cone that gradually decreases in diameter from the proximal end side 36b to the distal end side 36a, and the end surface 38 of the distal end side 36a is disposed in the central portion 8c of the substrate 8. The front end side 35a is provided so as to face the LED 9 and is surrounded by the remaining LED 9. Further, the protruding portion 36 is provided such that the front end side 36 a and the end surface 38 do not contact the one surface 8 a side of the substrate 8 and the LED 9.

Next, the operation of the first embodiment of the present invention will be described.

The light emitting device (LED light bulb) 1 is attached to a light bulb socket of a lighting fixture. When an AC voltage from an external power source is applied to the E-shaped base 26, the lighting device 5 operates, and a predetermined constant current (power) is supplied from the lighting device 5 to the plurality of LEDs 9 of the light emitter 2. The plurality of LEDs 9 are lit, generate heat and emit white light. White light is emitted toward the cover main body 35 on the front side of the light emitter 2.

White light emitted from the LED 9 provided at the central portion 8c of the substrate 8 is incident on the projecting portion 36 mainly from the end face 38, and is repeatedly reflected on the outer peripheral surface 36c in the projecting portion 36 from the front end side 36a. The light is guided (propagated) toward the end side 36b. A part of the white light guided through the protrusion 36 is emitted from the outer peripheral surface 36 c to the internal space of the cover main body 35, and a part of the white light is emitted from the top 37 to the external space of the cover main body 35. The White light emitted from the top portion 37 of the cover main body portion 35 to the external space causes the top portion 37 side to shine. This prevents a dark part from occurring at the top 37 of the cover main body 35.

The white light emitted from the outer peripheral surface 36c of the projecting portion 36 is formed in a truncated cone in which the projecting portion 36 is gradually reduced in diameter from the proximal end side 36b to the distal end side 36a. The light is emitted toward one end side 6 a of the cover main body 35. Then, the light passes through the cover main body 35 and is emitted from the outer surface 35 a to the external space over the circumference of the housing 4.

Further, the white light emitted from the LEDs 9 provided around the central portion 8 c of the substrate 8 is emitted toward the inner surface 35 b of the cover main body portion 35 and the outer peripheral surface 36 a of the protruding portion 36. The white light incident on the inner surface 35 b of the cover main body portion 35 is transmitted through the cover main body portion 35 and is emitted from the outer surface 35 a to the external space extending around the cover main body portion 35. Further, the white light incident on the outer peripheral surface 36a of the protruding portion 36 is mainly reflected by the outer peripheral surface 36c, and moves toward the one end side 6a of the cover main body portion 35 due to the shape of the truncated cone of the protruding portion 36. 35 is transmitted through the outer surface 35 a to the outer space around the casing 4.

Thus, in the light emitting device 1, the white light incident on the end surface 38 of the protrusion 36 is radiated from the outer peripheral surface 36 c to the one end side 6 a of the cover main body 35, and the white light incident on the outer peripheral surface 36 c is one end of the cover main body 35. A wide light distribution is obtained by reflection on the side 6a.

In the light emitter 2, the LED 9 is provided at the center 8c of the substrate 8, and the end surface 38 of the projecting portion 36 is directly opposed to the LED 9. Therefore, one end side of the cover main body portion 35 from the outer peripheral surface 36c of the projecting portion 36. The amount of light emitted to 6 a and emitted to the external space over the circumference of the housing 4 is ensured. Further, the light emitter 2 is provided with the LEDs 9 at substantially equal intervals around the central portion 8 c of the substrate 8 along the circumferential direction of the substrate 8, so that the external space with respect to the substantially spherical outer surface 35 a of the cover main body portion 35 is provided. The amount of light emitted to the light is uniformly ensured. As a result, the light emitting device 1 can obtain a wide light distribution having a uniform light flux around the light emitting device 1.

The heat generated in the LED 9 is mainly transferred from the substrate 8 to the outer case 18 of the housing 4 via the heat radiating plate 17 and released from the outer surface 18d of the outer case 18 to the external space. Further, the heat generated in the LED 9 is released into the internal space of the cover main body 35 and is transferred to the protrusion 36. Here, since the projecting portion 36 is provided so that the end surface 38 and the front end side 36a do not contact the LED 9 and the one surface 8a side of the substrate 8, heat transfer from the substrate 8 side that becomes a high temperature is suppressed, and thermal degradation occurs. Is suppressed. Thereby, the fall of the transmittance | permeability and reflectance in a protrusion part 36, discoloration, etc. are suppressed, and the function of the protrusion part 36 is maintained over the lifetime of the light-emitting device 1. FIG. In order to increase the incident light and realize higher light distribution, it is desirable that the distance between the end surface 38 of the protrusion 36 and the LED 9 or the first surface 8a side of the substrate 8 is within 10 mm.

According to the light emitting device 1 of the present embodiment, part of the radiated light of the light emitter 2 is incident and guided from the end surface 38 of the protrusion 36 of the cover body 6, and is guided from the top 37 of the cover body 35 to the external space. And is emitted from the outer peripheral surface 36 c of the protrusion 36 to the one end side 6 a of the cover main body 35 and emitted from the cover main body 35 to the external space extending around the casing 4. It is difficult to produce a dark portion on the 37 side, and it has an effect that a wide light distribution can be obtained with a simple configuration in which the cover body 6 having the protruding portion 36 is attached to the housing 4 and can be formed at low cost.

Further, since the end surface 38 and the front end side 36a, which are the front end portions of the projecting portions 36, are provided so as not to contact the LED 9 and the one surface 8a side of the substrate 8, heat transfer from the substrate 8 side that becomes a high temperature is suppressed. Accordingly, the thermal deterioration of the projecting portion 36 is suppressed, whereby the decrease in the amount of light emitted from the outer peripheral surface 36c of the projecting portion 36 and the top portion 37 of the cover main body portion 35 is suppressed, and the emitted light of the light emitting device 1 is emitted. This has the effect of preventing a reduction in efficiency.

Further, the light emitter 2 is provided with the LED 9 at the center portion 8c of the substrate 8 so as to face the end face 38 of the protruding portion 36, and the LED 9 is mounted around the center portion 8c of the substrate 8 along the circumferential direction of the substrate 8. Therefore, the amount of light incident on the protruding portion 36 from the end surface 38 of the protruding portion 36 is ensured, whereby the amount of light emitted to the external space over the circumference of the housing 4 can be ensured, and the cover body portion The amount of light emitted to the external space with respect to 35 can be ensured, thereby having the effect that a wide light distribution having a uniform luminous flux around the light emitting device 1 can be obtained.

In addition, in this embodiment, although the protrusion part 36 of the cover body 6 was formed in the truncated cone, it is not restricted to this, You may form in a cone or a cylinder. Moreover, it is not limited to a conical shape or a cylindrical shape, and may be formed in a polygonal columnar shape such as a hexagonal shape or an octagonal shape or a conical shape. However, the shape of the projecting portion 36 having an inclined surface that is reduced in diameter toward the substrate 8 is optimal in order to radiate incident light more into the space around the housing 4. The angle of the inclined surface is preferably 5 to 15 ° while the columnar shape is 0 °.

Further, the cover body portion 35 of the cover body 6 may not be substantially spherical, and the shape thereof is not limited as long as the other end side 6b is closed and the one end side 6a is opened. Or a square box shape.

Moreover, although the cover body 6 integrally formed the cover main body part 35 and the protrusion part 36, the cover main body part 35 and the protrusion part 36 may be separate from each other. The protruding portion 36 may be attached to the inner surface 35b of the cover main body portion 35 by welding, bonding or screwing. The cover body 6 is not limited to a resin material, and may be formed of translucent glass.

The light emitter 2 uses the packaged LED 9 as a light emitting element, but is not limited thereto, and may be formed by a COB method using an LED chip. An organic electroluminescence (EL) element may be used.

In addition, although one LED 9 is provided in the central portion 8c of the substrate 8, a plurality of LEDs 9 may be provided. The plurality of LEDs 9 may be opposed to the end surface 38 of the protrusion 36. Further, the LED 9 does not have to be directly opposed to the end surface 38 of the projecting portion 36, as long as a part of the emitted light of the light emitter 2 is incident on the end surface 38.

Further, although the E-shaped base 26 is provided as the power feeding unit, the present invention is not limited thereto, and for example, an insertion-type base may be used. Further, the housing 4 is not limited to a substantially truncated cone with a large diameter, but may be a cylinder such as a cylinder or a square tube.

Moreover, although the light-emitting device 1 of this embodiment was comprised in the LED light bulb, it is not restricted to this, For example, light-emitting devices, such as a spotlight which installs the lighting device 5, may be sufficient.

Next, a second embodiment of the present invention will be described.

The light emitting device (LED bulb) 1A of the present embodiment is formed as shown in FIG. In FIG. 3, the same parts as those in FIG. 1 and parts corresponding to the same parts are denoted by the same reference numerals and redundant description is omitted.

In the light emitting device 1A shown in FIG. 1, the light emitting device 1A is configured such that a protrusion 39 is provided around the outer peripheral surface 36c on the outer peripheral surface 36c side in the extending direction of the protruding portion 36. In the present embodiment, the protrusion 39 is provided so as to be located at the substantially spherical center of the cover main body 35. And the protrusion part 39 is formed in the substantially ellipsoid whose outer diameter increases / decreases in steps.

A part of the emitted light (white light) of the LED 9 incident from the end face 38 of the protrusion 36 is emitted in all directions except for the extending direction of the protrusion 36 at the protrusion 39. Thereby, 1 A of light-emitting devices appear that the center part of the cover body 6 is shining. In particular, when the cover body 6 is clear, the center portion of the cover body 6 appears to shine more remarkably, so that it becomes close to a conventional incandescent bulb. Thereby, 1 A of light-emitting devices can be used as a substitute of the conventional candle light bulb, for example.

In addition, the protrusion part 39 may be formed in the shape of an ellipsoid whose surface is smooth, and may be formed in the shape of a sphere or a substantially sphere.

According to the light emitting device 1A of the present embodiment, a dark portion is unlikely to occur at the top portion 37 of the cover main body portion 35, can be formed at a low cost, and a wide light distribution can be obtained. The effect is that the part can be illuminated.

Next, a third embodiment of the present invention will be described.

The lighting fixture 41 of this embodiment is comprised as shown in FIG. The same parts as those in FIG.

The lighting fixture 41 is a lamp, for example, a candle lamp, which is installed on an installation table 42 such as a desk or a shelf. The lighting fixture 41 (LED bulb) 1A shown in FIG. A light bulb socket 44 is provided as a socket to which the E-shaped base 26 (not shown) is attached. The instrument main body 43 is attached to a mounting base 45 formed in an ashtray shape by screws (not shown). The mounting base 45 has a flange portion 46 attached to the installation base 42 by screws (not shown). That is, the mounting base 45 is fixed to the installation base 42.

The instrument body 43 is connected to a power cord 48 having a plug 47 at the tip. The plug 47 is inserted and connected to the socket 50 of the wiring cord 49. As a result, external power is supplied to the socket 44 for the light bulb via the power cord 48 and the like. The light emitting device 1A is attached to the socket 44 for a light bulb. The light emitting device 1A is turned on in response to an on / off operation of a wall switch (not shown). The white light emitted from the cover body 6 illuminates the surrounding external space.

According to the lighting fixture 41 of the present embodiment, since the light emitting device 1A that can be formed at a low cost and has a wide light distribution and the center portion of the cover body 6 is visible, the running cost can be reduced, and a conventional candle or It has the effect that the external space can be illuminated with a partially glare emitted light like a candle bulb.

In addition, the lighting fixture of this embodiment may be an embedded type, a hanging type, or a direct mounting type lighting fixture.

Further, the above-described embodiment of the present invention is presented as an example, and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1,1A ... LED bulb as a light-emitting device, 2 ... Light-emitting body, 4 ... Housing, 6 ... Cover body, 5 ... Lighting device, 8 ... Board | substrate, 9 ... LED as a light emitting element, 20 ... As board mounting part Board mounting surface, 26 ... E-shaped base as a power feeding part, 35 ... Cover main body part, 36 ... Projection part, 39 ... Projection part, 41 ... Lighting equipment, 43 ... Equipment main body, 44 ... Light bulb socket as socket

Claims (4)

A light emitting body having a substrate and a light emitting element mounted on one surface side of the substrate; a power feeding portion on one end side and a substrate mounting portion on the other end side; and the other surface side of the light emitting body is attached to the substrate mounting portion A translucent cover main body portion attached to the other end side of the housing so as to cover the light emitter, and the top side of the cover main body portion extending from the top of the cover main body portion to the substrate side. A columnar or pyramidal protrusion provided inside the cover main body so as not to come into contact with one surface side, and a part of the radiated light of the light emitter is incident from the end face of the protrusion to guide the light. And a cover body that emits light from an outer peripheral surface of the projecting portion and a top portion of the cover main body portion. The light emitting element is provided with the light emitting element at the center of the substrate so as to face the end face of the protruding portion, and the light emitting element is mounted around the center along the circumferential direction of the substrate. The light-emitting device according to claim 1. 3. The light emitting device according to claim 1, wherein the protruding portion is provided with a protruding portion on the outer peripheral surface in the middle of the extending direction over the outer peripheral surface. The light-emitting device according to any one of claims 1 to 3, wherein a power supply unit of the housing is a base, and a lighting device that lights the light-emitting element is housed in the housing; A lighting fixture comprising: a fixture body having a socket to be connected;

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