CN202561471U - A lighting device and a lighting apparatus - Google Patents

Abstract

A lighting device and a lighting fixture capable of ensuring thermal reliability for suppressing a decrease in luminous efficiency and mechanical reliability of a cover member. A lighting device (10) includes: a main body (11), a light emitting part (13), a cover member (14), and an engaging unit (17). The body (11) has thermal conductivity and contains a rigid body. The light emitting part (13) is arranged on the body and includes a solid state light emitting element (12). The cover member (14) is arranged to cover the solid-state light-emitting element of the light-emitting part, and includes a rigid body with thermal conductivity and light transmission. The engaging unit (17) includes a groove (17a) and a protrusion (17b), and engages the main body and the cover member. Furthermore, the heat generated by the solid-state light-emitting element is conducted to the cover member through the engaging unit.

Description

Lighting devices and lighting fixtures

technical field

Embodiments of the present invention relate to a lighting device and a lighting fixture using a solid-state light-emitting element such as a light-emitting diode (diode) as a light source.

Background technique

In recent years, since the luminous efficiency of solid-state light-emitting elements such as light-emitting diodes (hereinafter referred to as "LED (Light Emitting Diode)") has improved, they have been used as light sources for general lighting, and various LED lamps (lamps) or lamps have been developed. etc. lighting devices.

[Prior art literature]

[Patent Document]

[Patent Document 1] Japanese Patent Laid-Open No. 2009-37995

[Patent Document 2] Japanese Patent Laid-Open No. 2006-49410

[Patent Document 3] Japanese Patent Laid-Open No. 8-273609

However, for LEDs, as the temperature rises, the light output decreases and the luminous efficiency decreases. Therefore, it is necessary to suppress the temperature rise. In addition, LED lamps have a long life, and are used repeatedly for a long period of time by turning them on and off. Therefore, it is necessary to ensure sufficient mechanical reliability in the lamp configuration, particularly in the coupling of a cover member including a globe and a main body. Therefore, an important issue for such a lighting device using solid-state light-emitting elements as a light source is: how to obtain thermal reliability for suppressing a decrease in luminous efficiency and mechanical reliability of the lampshade.

Utility model content

This invention was made in view of the said subject, and aims at providing the lighting device and lighting fixture which can ensure the thermal reliability for suppressing the fall of luminous efficiency, and the mechanical reliability of a cover member.

A lighting device according to an embodiment includes a main body, a light emitting unit, a cover member, and an engaging unit. The body is thermally conductive and contains rigid bodies. The light emitting part is arranged on the body and includes a solid state light emitting element. The cover member is set to cover the solid-state light-emitting element of the light-emitting part, and includes a rigid body with thermal conductivity and light transmission. The engaging unit includes a groove and a protrusion, and engages the main body and the cover member. Furthermore, the heat generated by the solid-state light-emitting element is conducted to the cover member through the engaging unit.

[effect of utility model]

According to the present invention, it is possible to provide a lighting device capable of ensuring thermal reliability for suppressing a decrease in luminous efficiency and mechanical reliability of a cover member.

Description of drawings

Fig. 1 shows a lighting device as an embodiment of the present utility model, Fig. 1(a) is a plan view showing a state in which the cover member is removed, Fig. 1(b) is a longitudinal sectional view, and Fig. 1(c) is an enlarged view FIG. 1( d ) is an enlarged cross-sectional view showing part A of this (b) figure.

Fig. 2 is a front view of a lighting device as an embodiment of the present invention.

Fig. 3 shows the lighting device, Fig. 3(a) is an enlarged cross-sectional view of the engaging unit, and Fig. 3(b) shows a notch of the engaging unit, and is a perspective view of the main body viewed from above.

Fig. 4 schematically shows the lighting device, Fig. 4(a) is a front view of the cover member, Fig. 4(b) is a bottom view of the cover member, Fig. 4(c) is a side view of the molding die of the cover member, Fig. 4 (d) is a bottom view of the molding die of the cover member.

Fig. 5 is a cross-sectional view schematically showing a state in which a lighting fixture to which a lighting device is attached is installed on a ceiling.

Fig. 6 shows the modified example of lighting device, and Fig. 6 (a) is the sectional view corresponding to Fig. 3 (a) showing the first modified example, Fig. 6 (b) is the sectional view corresponding to Fig. 3 (a) showing the second modified example ) profile.

[explanation of the symbol]

10: Lighting device / lamp with lamp socket

11: Ontology

11a, 11b, 20a, 31a: openings

11a1: Open end face

11c: storage department

11e: Substrate support part

11f: convex part

12: Solid state light emitting element/LED

13: Luminous Department

13a: Substrate

13b: fixed unit

14: Cover member

14a: Opening

14b: front end

15: lighting device

15a: Circuit board

15b: Electronic parts

15c, S: Adhesive

16: lamp port component

16a: Shell

16b: Electrical insulation part

16c: eyelet

17: Snap unit

17a: Groove

17a1: Notch

17a2: Wall

17a4, 17b1: inclined part

17b: protrusion

17b2: section

17b3: lower surface

20: Insulated shell

20c: lamp port installation part

30: Lighting fixtures

31: appliance body

32: reflector

33: lamp holder

A, B: part

D1: outer diameter

K1, K2: combination mold

L1: full length

O, O': center

P: Department of Space

S: Adhesive

T: top

t1, t2: wall thickness size

x-x: center line

X: ceiling surface

y: optical axis

Detailed ways

Hereinafter, embodiments of lighting devices and lighting fixtures will be described with reference to the drawings.

First, the configuration of the lighting device will be described. The lighting device of the present embodiment constitutes, for example, a small lamp with a cap 10 that can replace a 60W mini krypton bulb with an E17 cap. As shown in Fig. 1(a) to Fig. 1(d) to Fig. 4(a) to Fig. 4(d), the lighting device of this embodiment includes: a main body 11 including a rigid body with thermal conductivity; a light emitting part 13 , is arranged on the body 11, and the light-emitting part 13 has a solid-state light-emitting element 12; the outer cover member 14 is set to cover the solid-state light-emitting element 12 of the light-emitting part 13, and the outer cover member 14 includes a rigid light-emitting element with thermal conductivity and light transmittance body; and the engaging unit 17, which includes a groove 17a and a protrusion 17b provided for engaging the main body 11 and the cover member 14.

In order to support the light emitting part 13, the lighting device 15 and the socket member 16 described later, the main body 11 must have a certain rigidity, and in order to release the heat from the light emitting part 13 or the lighting device 15, the main body 11 must be It is thermally conductive. In order to satisfy these conditions, in the present embodiment, the main body 11 is made of aluminum. The main body 11 made of aluminum has a cylindrical shape with a substantially circular cross-sectional shape, and is integrally formed with a storage portion 11c having an opening 11a having a large diameter at one end side and a large diameter opening 11a at the other end side. Small opening 11b. In addition, as shown in FIG. 2 , the outer peripheral surface of the main body 11 is formed as a substantially conical inclined surface whose diameter gradually decreases from one end side to the other end side, and the appearance is configured in the following shape, which is similar to a mini kryptonite. Silhouette of the neck in the bulb. The aluminum main body 11 having such a configuration is produced, for example, by casting, forging, cutting, etc., and the aluminum main body 11 is formed as a cylinder having a space inside and one end of which is opened.

At the opening 11a on the one end side of the main body 11, a substrate supporting portion 11e is integrally formed. The substrate supporting portion 11e forms a ring-shaped recessed portion, and the surface of the recessed portion is formed as a flat surface. . A ring-shaped convex portion 11f is integrally formed around the substrate supporting portion 11e. Moreover, the storage part 11c integrally formed in the main body 11 has the space for arranging the circuit board which comprises the lighting device 15 mentioned later formed inside. The accommodating portion 11 c has a substantially circular cross section centered on the center line x-x of the main body 11 , and has a substantially truncated conical shape whose inner diameter decreases from one end side to the other end side. In order to electrically insulate the lighting device 15 and the main body 11, an insulating case 20 is fixed inside the housing portion 11c.

The insulating case 20 is made of: synthetic resin having heat resistance and electrical insulation such as polyethylene terephthalate (Polybutylene Terephthalate, PBT), and an opening 20a is formed on one end side, and the other end side is closed. . The insulating case 20 is configured in a shape of a substantially truncated cone with a bottom that substantially matches the shape of the inner surface of the housing portion 11c. Further, the insulating case 20 protrudes from an opening 11b on the other end side of the main body 11, and is fixed in the accommodating portion 11c by pressing the opening 20a through a substrate 13a described later. It may also be fixed in the housing portion 11c with screws, or an adhesive such as silicone resin or epoxy resin. In addition, on the other end side of the insulating case 20, a cap mounting portion 20c is integrally formed, and the outer periphery of the cap mounting portion 20c has a step shape.

In this embodiment, a solid-state light-emitting element 12 is formed by using a light-emitting diode (hereinafter referred to as "LED"), and in this embodiment, the solid-state light-emitting element 12 includes: 4 surface mount devices (Surface Mount Device, SMD) type of LED. Furthermore, the LED can also be a so-called chip on board (COB) type LED, and the so-called COB (Chip on Board) type LED is formed by a plurality of LED chips (chip) and the LED The phosphors excited by the chip emit white light (including daytime color, daylight color, and light bulb color).

The light emitting unit 13 includes a metal substrate having good thermal conductivity, and in the present embodiment includes a flat, thin, circular plate-shaped aluminum substrate 13 a. A wiring pattern (pattern) including copper foil is formed on the upper surface of the surface ( FIG. 1( b )) of the substrate 13 a through an electrical insulating layer such as silicone resin. The four LEDs 12 are arranged approximately concentrically at approximately equal intervals and mounted on the wiring pattern. This constitutes a light emitting unit 13 including a light emitting module in which four LEDs 12 are arranged approximately symmetrically on a circular plate-shaped substrate 13a ( FIG. 1( a )).

In order to achieve electrical insulation from the substrate supporting portion 11e formed on one end side of the main body 11, an electrical insulating sheet (not shown) containing silicone resin or the like is interposed, and a fixing unit 13b such as a screw is used. The constituted light emitting unit 13 is fixed to the surface of the substrate supporting unit 11e having a flat surface. Thereby, the light emitting part 13 is closely adhered and fixed to the substrate support part 11e.

Thereby, the light-emitting part 13 is disposed on the one end side of the main body 11, and the back surface of the substrate 13a is reliably adhered to the substrate supporting part 11e of the main body 11, and the substrate 13a is made of aluminum having good thermal conductivity, so that the The heat generated mainly from the back side of the LED 12 is conducted to the main body 11 to release the heat. According to the above configuration, the optical axis y of the light emitting unit 13 including the substrate 13a on which the four LEDs 12 are mounted approximately coincides with the central axis x-x of the main body 11, thereby constituting a light source unit comprising approximately Rounded luminous surface.

The cover member 14 constitutes a shade of the lamp, so the cover member 14 must have light transmission properties and thermal conductivity in order to dissipate heat generated by the light emitting unit 13 and the like. Furthermore, since the function of the cover for protecting the light emitting part 13 is required, it is comprised with the member which has a certain rigidity. In the present embodiment, a member satisfying the above-mentioned conditions is formed using translucent ceramics. The translucent ceramics in this embodiment are, for example, preferably translucent ceramics used in luminous tubes such as sodium lamps or metal halide lamps. Optical polycrystalline alumina ceramics (aluminum oxide), yttrium-aluminum-garnet (Yttrium Aluminum Garnet, YAG), yttrium oxide (YOX), and aluminum nitride (AlN) light-transmitting ceramics constitute the described Translucent ceramics. The light-transmitting ceramics with the above configuration are molded and calcined to form a milky-white lampshade having an opening 14a at one end side and having a substantially hemispherical shape. The milky-white lampshade has an overall shape approximately The outline of the lampshade of the mini krypton bulb has a smooth curved shape and has light diffusion.

As mentioned above, the use of light-transmitting ceramics as the cover member 14 can effectively utilize the cover member that was not conducive to heat dissipation in the past to effectively release the heat generated by the solid-state light-emitting element, thereby improving the luminous efficiency. improve. By the way, in the past, although the surface area of such a cover member such as a lampshade occupies a ratio of about 30% to 40% of the surface area of the entire lamp with a cap, the material of these cover members is glass. Or synthetic resin, therefore, the thermal conductivity is low, which does not help to improve the heat dissipation effect. On the other hand, according to this embodiment, the cover member is made of light-transmitting ceramics with excellent thermal conductivity, and the surface area of the cover member accounts for about 30% to 40%, thereby improving the heat dissipation performance of the entire lamp. Therefore, it is possible to constitute a lighting device such as a lamp with a lamp with a higher efficiency.

In order to protect the light emitting part 13, the cover member 14 comprised as mentioned above is fixed to the opening part 11a of the main body 11 so that the light emitting part 13 may be covered. The fixation is to combine the aluminum main body 11 containing a rigid body with the ceramic cover member 14 also containing a rigid body, because the heat of the light emitting part 13 must be conducted more efficiently from the main body 11 to the cover member 14, and then This heat is released, and therefore, bonding is performed as follows.

That is, as shown in FIG. 3(a) and FIG. 3(b), for example, since it is difficult to combine the rigid main body 11 and the cover member 14 by using a material with high flexibility such as synthetic resin, The main body 11 and the cover member 14 are bonded together by an adhesive having good thermal conductivity. Moreover, in order to prevent the positions of the cover member 14 and the main body 11 from being misaligned due to long-term creep (creep) (thermal creep), the cover member 14 and the main body 11 are mechanically locked by the engaging unit 17 . Closed and fixed, the engaging unit 17 includes: a groove portion 17a and a protruding portion 17b provided opposite to the main body 11 and the cover member 14 .

The engagement unit 17 includes: an annular groove portion 17a integrally formed on the inner peripheral surface of the opening on the one end side of the main body 11, that is, the inner peripheral surface of the protruding line portion 11f; peripheral surface. The groove portion 17a includes a notch portion 17a1 ( FIG. 1( a ), FIG. 3( b )) into which the protrusion 17b of the cover member 14 is inserted. A pair of two notch portions 17 a 1 are integrally cut and formed, and the pair of two notch portions 17 a 1 are symmetrical with respect to the center O of the main body 11 .

As schematically shown in FIG. 4(a) and FIG. 4(b), the protrusion 17b includes a pair of two protrusions, and the pair of two protrusions is symmetrical with respect to the center O' of the cover member 14, and It is integrally protrudingly formed on the outer peripheral surface of the cover member 14 . The inclined portion 17b1 is formed to form an inclined plane at a closed angle with respect to the direction of the groove portion 17a of the main body 11, and the annular step portion 17b2 is integrally formed above the protrusion 17b. The slope part 17b1 includes the slope part formed in the upper surface of the protrusion part 17b, and the slope part formed in both side surfaces. The inclination angle of the inclination portion 17b1 is only required to satisfy an angle corresponding to the draft angle of a molding die used when molding a globe made of ceramics.

Next, align the pair of protrusions 17b of the cover member 14 with the pair of notches 17a1 of the main body 11, insert the protrusions 17b from the notches 17a1 into the grooves 17a, and rotate the protrusions 17b ( Rotate to the left or right) by the specified angle. Thereby, as shown in FIG. 3( a ), the protruding portion 17b is engaged in the groove portion 17a and is mechanically coupled, thereby preventing the misalignment of the cover member 14 and the main body 11 caused by long-term creep (thermal creep). . Furthermore, it is preferable to apply the adhesive S to the groove portion 17a of the main body 11 in advance. The adhesive is preferably an adhesive containing silicone resin or epoxy resin having thermal conductivity and heat resistance.

Moreover, the groove part 17a is engaged with the protrusion part 17b, and the wall surface 17a2 of the lower surface of the groove part 17a is bonded and thermally connected with the lower surface 17b3 of the protrusion part 17b by this. Meanwhile, the lower surface of the segment portion 17b2 of the housing member 14 is engaged and thermally connected to the opening end surface 11a1 of the opening portion 11a of the body 11 . Furthermore, even when a slight gap is formed in the thermally connected portion, since the adhesive S enters into the gap, the thermal connection is maintained. According to the above function, the heat that has been conducted to the light emitting part 13 of the main body 11 can be efficiently conducted to Cover member 14 .

Furthermore, in the engaged state of the groove portion 17a and the protrusion portion 17b, the formed space P having a triangular cross-section becomes an adhesive reservoir, thereby preventing the adhesive S from seeping out to the surface of the main body 11. , and the appearance is also good. At the same time, since the adhesive S is filled in the space P, it can be fixed more firmly, and the light that has been conducted to the light emitting part 13 of the main body 11 can be more efficiently transmitted by the filled adhesive. The heat is conducted to the cover member 14 .

According to the above, the aluminum main body 11 and the ceramic outer cover member 14 including rigid bodies can be firmly fixed by the engaging unit 17, thereby preventing the misalignment of the outer cover member 14 and the main body 11. The LED 12 of the light emitting part 13 is covered reliably for a long time by the component 14. Furthermore, the heat of the light emitting unit 13 can be efficiently conducted to the cover member 14 by the engaging unit 17 to release the heat. Thereby, the cover member 14 made of translucent ceramics can diffuse and transmit the light emitted from the LED 12, and can release heat mainly generated on the surface side of the LED 12 to the outside. At the same time, the cover member 14 is connected to the opening 11a of the main body 11 in a heat-conductive manner by means of the engaging unit 17, and the heat mainly generated by the back side of the LED 12 is conducted from the main body 11 to the cover member 14, and then the This heat is dissipated to exert an effective heat dissipation effect, thereby suppressing a decrease in the luminous efficiency of the LED.

In addition, in the present embodiment, the thickness of the cover member 14 made of translucent ceramics is not uniform. That is, the ratio of the minimum thickness portion to the maximum thickness portion is configured to be 1:3 or more. In this embodiment, as shown in FIG. 1( b ) and FIG. 1( c ), the wall thickness dimension t1 ( FIG. 1( b )) of the top T is set to about 1 mm, and the wall thickness dimension t2 on the side of the opening 14 a ( FIG. 1( c )) is about 3 mm, the minimum thickness portion becomes the top T, and the maximum thickness portion becomes the opening 14 a. Thereby, the light transmittance on the T side of the top can be increased, and light distribution or light diffusivity corresponding to the application of lighting can be produced, for example, it is possible to brightly illuminate directly under a down light. In addition, the opening 14a is thickened, that is, the part that is the contact portion between the cover member 14 and the main body 11 is thickened, and the contact area of this part is set to a large contact area, whereby heat can be efficiently transferred from the main body. The 11 side conducts to the housing member 14 . Furthermore, the strength of the portion where the cover member 14 is fixed to the main body 11 can be improved. At the same time, when manufacturing the cover member 14 , it is not necessary to uniformly process the entire cover member, and it is possible to improve the machining accuracy of ceramics, which are difficult to process, and ensure stable productivity. In addition, the outer diameter D1 (FIG. 2) of the cover member 14 is comprised so that it may be about 35 mm.

In addition, a pair of protrusions 17b of the engaging unit 17 are formed on the outer peripheral surface of the cover member 14, the pair of protrusions 17b having symmetry with respect to the center O' of the cover member 14, and the pair of protrusions 17b Formed to include the inclined portion 17b1, therefore, as shown in Fig. 4(c) and Fig. 4(d), the outer cover made of ceramics can be easily produced by two piece (piece) combined molds K1, K2 without using complicated molds The member 14 can further improve productivity, and can constitute a cost-effective lighting device.

As shown in FIG. 1( b), the lighting device 15 includes: a flat circuit board 15a on which circuit components are mounted, and the circuit components constitute a lighting circuit for each LED 12. This lighting circuit converts an AC voltage of 100 V into a DC voltage of 24 V, and supplies a constant DC current to each LED 12. The circuit board 15a is formed in a strip-shaped vertically long shape, and a circuit pattern is formed on one or both surfaces. On the mounting surface of the circuit board 15a, a plurality of small electronic components 15b for constituting a lighting circuit, such as lead components such as small electrolytic capacitors or chip components such as transistors, are mounted. . Moreover, the circuit board 15a is accommodated vertically in the insulating case 20 provided in the housing recess 11c of the main body 11, and is filled with silicone resin or epoxy resin, etc., which have good thermal conductivity and good electrical insulation. The adhesive 15c is used to embed and fix the circuit board 15a and the electronic components 15b. Thereby, the heat generated by each electronic component 15b is dispersed in the adhesive, saturated and then homogenized. In addition, a wire (not shown) for power supply for supplying power to each LED 12 is connected to the output terminal of the circuit board 15a, and an input wire (not shown) is connected to the input terminal.

As shown in FIG. 1( b ), in an Edison type (Edison type) E17 socket, the socket member 16 connected to the lighting device 15 and provided on the other end side of the main body 11 includes: a tube made of copper plate with threads Shaped shell portion 16a; and a conductive eyelet (eyelet) portion 16c is provided on the top of the lower end of the shell portion 16a via the electrical insulating portion 16b. The opening of the case portion 16a is fitted into the cap mounting portion 20c of the insulating case 20 from the outside, and is attached by bonding or caulking using an adhesive such as silicone resin or epoxy resin. The opening of the case 16 a is fixed to the other end side of the main body 11 while being electrically insulated from the main body 11 . An input line led out from an input terminal of the circuit board 15 a in the lighting device 15 is connected to the case portion 16 a and the eyelet portion 16 c.

Thereby, a bulb-shaped lamp with a cap 10 is formed. The bulb-shaped lamp with a cap 10 includes a milky white cover member 14 made of translucent ceramics on one end side of the main body 11, and It includes a light-emitting part 13 using LED 12 as a light source, and an E17 lamp socket member 16 is arranged on the other end side, and the overall appearance shape is similar to the outline of a 60 W mini krypton bulb (Fig. 2). The overall length L1 of the lamp with a base is about 67 mm.

Next, the configuration of a lighting fixture using the lamp 10 with a cap configured as described above as a light source will be described. As shown in FIG. 5 , 30 is a conventional lighting fixture of downlight type. This lighting fixture 30 is embedded in the ceiling surface X of a store or the like, and uses a mini krypton bulb with an E17 socket as a light source. The lighting fixture 30 includes: a fixture body 31 in the shape of a metal box with an opening 31a on the lower surface; a metal reflector 32 fitted into the opening 31a; and a socket 33 that can be made of a miniature The E17 socket of the krypton bulb is screwed in. The reflector 32 is made of, for example, a metal plate such as stainless steel, and a lamp socket 33 is provided at the center of the upper plate of the reflector 32 .

In the conventional lighting fixture 30 for miniature krypton bulbs configured as described above, for energy saving and long life, etc., the aforementioned lightbulb-shaped lamp 10 with a cap using LED as a light source is used instead of miniature krypton bulbs. . That is, since the cap member 16 of the capped lamp 10 is configured as E17, the capped lamp 10 can be directly inserted into the socket 33 for the mini krypton bulb of the lighting fixture. At this time, since the outer peripheral surface of the lamp 10 with a cap is a substantially conical slope, and the appearance is configured to approximate the contour of the neck of a mini krypton bulb, the neck does not reflect off the periphery of the lamp socket. Body 32 and the like can be smoothly inserted, and the bulb-shaped lamp 10 with a socket is more applicable to existing lighting fixtures. Thereby, the energy-saving downlight which uses LED as a light source is comprised. Of course, it is also possible to configure a novel downlight in the same manner as described above.

After the power is turned on in this state, power is supplied from the socket 33 through the cap member 16 of the capped lamp 10, and the lighting device 15 operates to output a DC voltage of 24V. The direct current voltage is applied from the lighting device 15 to each LED 12, and when a constant direct current is supplied, all the LEDs 12 are simultaneously lit.

The white light emitted from each LED 12 is emitted substantially uniformly to the entire inner surface of the cover member 14, and the milky white lampshade made of translucent ceramics diffuses the light, so it is possible to perform a light distribution similar to that of a mini krypton bulb. Characteristic lighting. In addition, the substrate 13a is plate-shaped, and the LED 12 is mounted on the surface of the substrate 13a, and the back surface is enclosed in the substrate supporting portion 11e including the concave segment portion on one end side of the body 11, so the substrate 13a will not be a shadow. While appearing on the inner surface of the lampshade, the substrate 13a does not hinder the light distribution characteristics. In particular, the light distribution of the capped lamp 10 as a light source is close to the light distribution of the mini krypton bulb. Therefore, the amount of light irradiated to the reflector 32 near the lamp socket 33 arranged in the lighting fixture 30 increases, The properties of the appliance as described by the optical design of the reflector 32 configured as a mini-krypton bulb can be achieved approximately.

In addition, the lampshade integrally formed from light-transmitting ceramics is easy to obtain optical homogeneity, and can diffuse light more uniformly, so that lighting with light distribution characteristics more similar to mini krypton bulbs can be performed, or lighting with Illumination with light distribution characteristics as follows: the light distribution characteristics are above the light distribution characteristics of the mini krypton bulb. Moreover, it also has sufficient heat resistance and mechanical strength, and is hard to be damaged by vibration etc. at the time of transportation.

Simultaneously, after the lamp 10 with lamp socket of bulb shape is lit, the temperature of LED 12 can rise and generate heat. This heat, that is, heat mainly generated on the surface side of the LED 12, is released from the cover member 14 made of translucent ceramics to the outside. In addition, the heat generated mainly on the back side of the LED 12, that is, on the back side of the substrate 13a, is conducted from the substrate 13a made of aluminum having good thermal conductivity to the substrate supporting portion 11e directly adhering to and fixing the substrate, and then transferred from the substrate 11e made of aluminum. The outer peripheral surface of the body 11 is released to the outside. The temperature rise of the LED 12 is suppressed by the effective heat dissipation effect.

In addition, especially in this embodiment, the main body 11 and the cover member 14 are thermally connected by the engagement unit 17 , whereby the heat from the light emitting portion 13 conducted to the main body 11 can be efficiently conducted to the cover member 14 , and the heat mainly generated by the back side of the LED 12 is conducted from the body 11 to the cover member 14, and the heat is released. Therefore, a more effective heat radiation effect is produced, the temperature rise of LED12 is further suppressed, and the fall of the luminous efficiency of the lamp with a cap is suppressed. Thereby, bright lighting can be performed as a downlight.

As described above, according to the present embodiment, the cover member 14 is formed of translucent ceramics, and the cover member 14 is provided facing to cover the LED 12 of the light emitting unit 13 . Therefore, the light radiated from the LED 12 can be transmitted, and the heat generated by the LED 12 can be effectively released, so that a lighting device such as a lamp with a base that can suppress a decrease in luminous efficiency can be provided. In addition, the cover member 14 is made of light-transmitting ceramics with a small thermal expansion coefficient (aluminum oxide: 6.0×10 ⁻⁶ /° C.), and the cover member 14 is firmly fixed to the The main body 11, therefore, can also reliably prevent the natural fall or the like of the cover member 14 caused by heat cycle expansion. The thermal cycle expansion is caused by repeated lighting and extinguishing of the lamp. According to the above functions, it is possible to provide various lighting devices such as a lamp with a cap that can ensure thermal reliability for suppressing a decrease in luminous efficiency and mechanical reliability of the cover member.

In addition, translucent ceramics have excellent heat resistance and high mechanical strength. Therefore, a safe lamp with a cap can be constructed. Even when internal pressure is applied to the cover member 14, it will not be easily melted or damaged. In addition, the translucent ceramics constituting the cover member 14 can be fully integrally molded, and the cover member 14 of various shapes can be easily formed, so that lighting devices and lighting fixtures such as lamps with caps suitable for mass production can be provided. .

As mentioned above, in this embodiment, as shown in FIG. The surfaces of the substrate 13a come into contact. According to this configuration, the cover member 14 is thermally connected to the light-emitting portion 13. Therefore, the heat mainly generated on the surface side of the solid-state light-emitting element can be conducted to the cover member 14 made of ceramics through heat conduction, thereby effectively dissipating the heat. The heat of the light emitting part 13 is released. Moreover, a more effective heat dissipation effect can be realized by a simple structure, which means that the front end of the opening 14a is only connected to the surface of the substrate 13a. Furthermore, an adhesive having good thermal conductivity may be used to fix the connection portion between the front end 14b of the opening 14a of the cover member 14 and the light emitting unit 13 .

In addition, as shown in FIG. 6( b ), the groove portion 17 a of the engaging unit 17 may form an inclined portion 17 a 4 that matches the inclined portion 17 b 1 of the protruding portion 17 b. According to this structure, since the groove part 17a and the slope part of the protrusion part 17b are joined and thermally connected, heat can be more effectively conducted from the main body 11 to the cover member 14. FIG.

In addition, the engagement unit 17 includes a groove 17a provided on the main body 11 and a protrusion 17b provided on the cover member 14, but conversely, the groove 17a may be provided on the cover member 14 and the protrusion 17b may be provided on the Ontology 11.

Moreover, for the main body 11 of the lamp with a cap, the outer surface part exposed to the outside can also be formed into a concave-convex shape or a satin pattern, for example, to increase the surface area; or implement white paint treatment or white anodized aluminum ( alumite) to increase the thermal emissivity of the outer surface. In addition, in the case of performing white painting or white anodized aluminum treatment, when the bulb-shaped lamp 10 with a cap is attached to the lighting fixture 30 and turned on, the reflection on the outer surface of the aluminum main body 11 exposed to the outer surface As the rate becomes higher, the efficiency of the appliance can be improved, and the appearance and design are also good, so that the commerciality can also be improved.

Moreover, in this embodiment, the illuminating device can also be configured as a bulb-shaped lamp with a cap (A-shape or PS-shaped), a spherical lamp with a cap (G-shape), Cylindrical capped lamps (T-shape) and reflective capped lamps (R-shaped) can also be configured as flat, thin-shaped lamps using GX53 caps. In addition, it is not limited to a lamp with a base having a shape similar to that of an ordinary incandescent light bulb, and it is applicable to lamps with a base having various other appearance shapes and uses. In addition, although it is suitable for small lamps with caps that can replace mini krypton bulbs with E17 caps of 60W, it is not limited to this, and can also be applied to incandescent bulbs such as 40W, 60W, and 100W that can replace E26 caps. Or lamps with sockets such as bulb-shaped fluorescent lamps.

In order to improve the heat dissipation of the solid-state light-emitting element, it is preferable to use a metal with good thermal conductivity, for example, to use at least one metal containing aluminum (Al), copper (Cu), iron (Fe), and nickel (Ni). Metals used to form the body including the rigid body, in addition, aluminum nitride (AlN), silicon carbide (SiC) and other industrial materials can also be used to form the body. If the appearance shape is formed as follows, the applicability to existing lighting fixtures will increase, so it is preferable that the shape is similar to that of an ordinary incandescent light bulb in which the diameter gradually decreases from one end to the other end. The shape of the outline of the neck portion, however, is not a condition to be similar to an ordinary incandescent bulb here, and is not limited to a limited specific appearance shape. In addition, in order to further improve the heat dissipation performance, a plurality of fins or pins protruding radially from one end side to the other end side may also be integrally formed on the outer peripheral surface of the body. .

The solid-state light-emitting element is preferably composed of an LED chip containing gallium nitride (GaN) semiconductors that emit blue light, but it is allowed to use semiconductor lasers (lasers), organic electroluminescence (Electroluminescence, EL) elements, etc. as light sources. Solid State Lighting Elements. In addition, although light is emitted in white, red, blue, green, etc. light may be emitted depending on the application of the lighting fixture, and various colors may be combined. In addition, it can also have a dimming function or a color adjustment function.

The light-emitting part can be constituted as a COB module. The COB module uses COB (Chip on Board) technology to arrange a part or all of the solid-state light-emitting elements regularly and Mounted on one side of the substrate. Also can utilize SMD (Surface Mount Device) packing body (package) to constitute described light-emitting part, under the situation of SMD package body, preferably, utilize a plurality of solid-state light-emitting elements to constitute light-emitting part, but also can according to illumination Use to select the required number of solid-state light-emitting elements, for example, to form an element group of about four solid-state light-emitting elements, and then form one or more groups. In addition, the light-emitting part can also be formed by using a solid-state light-emitting element.

As described above, the light-emitting unit is preferably configured as a light-emitting module in which a solid-state light-emitting element as a light source is mounted on the surface of a substrate, but it may also be a light-emitting unit configured without a substrate. In addition, in order to form a point module or a surface module, the shape of the light emitting part can be a plate-shaped circle, a polygonal shape such as a quadrangle, a hexagon, or an elliptical shape, etc. The shape of the light emitting part is allowed to be used for The overall shape of the target light distribution characteristic is obtained.

For the light-emitting part, for example, it is preferable to dispose the other surface side of the metal substrate on the substrate support part formed on the one end side of the main body in a heat-conductive manner. The generated heat is dissipated through the main body, and the metal substrate is provided with a solid-state light-emitting element on one surface side, but the specific means for dissipating heat through the main body is not limited to the above-mentioned illustrated configuration. For example, the substrate support portion may be flat and have a large area, or may be a ring-shaped segment-shaped support portion, and the material of the substrate is not limited to metal, and may be synthetic resin such as glass epoxy. In addition, the light-emitting part can release the heat generated by the solid-state light-emitting element only through the main body, or dissipate heat through the main body and other components such as the socket component.

In addition, it is preferable to use a lampshade of a similar shape that is the same or substantially the same shape as a light bulb, and is the same as or substantially the same shape as a T-shaped or R-shaped light bulb to constitute the cover member. substantially the same shape, the bulb has the same appearance shape as that of a bulb for general lighting such as an incandescent bulb, and is in a shape commonly called a teardrop shape such as an A shape, a PS shape, or a spherical shape called a G shape, but the The cover member may also be in the shape of a saucer constituting a lamp of a flat, thin structure, and may also be constructed using a protective cover for protecting charging of solid-state light-emitting elements such as light-emitting diodes. The parts, etc. are not affected by the outside, and are transparent or translucent disk-shaped.

As an example, the cover member preferably adopts the following configuration, that is, the outer diameter is about 700 mm or less, the wall thickness is 0.5 mm to 3 mm, preferably 1 mm to 2 mm, especially about 200 mm or less, and the wall thickness is about 1 mm. about. In addition, depending on the required properties, the cover member may be translucent, such as colorless transparent or milky white, having light diffusing properties, and the cover member may be colored or the like. In order to improve light distribution characteristics, reflective means such as a reflective film may be formed on a part of the globe or the like. In addition, the cover member preferably constitutes an enclosure that substantially seals the light-emitting part. However, complete sealing is not a requirement, as long as it is optically sealed. For example, small holes for ventilation may be locally formed.

The socket member allows the use of all lamp sockets that can be installed in the lamp socket. The lamp socket can be installed with ordinary incandescent bulbs or bulb-shaped fluorescent lamps, etc., but generally speaking, the most popular Edison-type lamp sockets such as E17 or E26 are better. . In addition, in terms of material, metal can be used to form the entire lamp socket, and the lamp socket can be made of resin lamp socket. The resin lamp socket uses metal such as copper plate to form the electrical connection part, and is made of synthetic resin. The parts other than the electrical connection part may be the GX53 socket used for a lamp with a flat and thin structure, the socket of a pin-shaped terminal used in a fluorescent lamp, or the socket used for a lamp with a flat and thin structure. The socket of the L-shaped terminal hooked to the ceiling is not limited to a specific socket.

Considering the direct replacement of light sources such as ordinary incandescent bulbs, it is advantageous to arrange the lighting device for lighting the solid-state light-emitting element in the body, but the lighting device can also be provided separately. In addition, the lighting device may also include a dimming circuit or a color adjustment circuit for dimming the solid-state light emitting element.

In this embodiment, the lighting fixtures are allowed to be ceiling-embedded lighting fixtures, direct-installation lighting fixtures, suspension-type lighting fixtures, and wall-mounted lighting fixtures. Shades, reflectors, etc. are used as light control bodies, and lamps with lamp sockets as light sources can also be exposed. In addition, it is not limited to attaching one lamp with a base to the apparatus body, and a plurality of lamps with a base may be arranged. Furthermore, it is also possible to configure large-scale indoor and outdoor lighting fixtures and the like for facilities and business such as offices.

In addition, in FIG. 6 (a) which shows the modification of this embodiment, FIG. 6 (b), attach the same code|symbol to the part which is the same as FIG. And a detailed description is omitted. As mentioned above, although preferred embodiment of this invention was demonstrated, this invention is not limited to the said embodiment, Various design changes are possible in the range which does not deviate from the summary of this invention.

Claims (4)

1. A lighting device, characterized in that it comprises: Body, which is thermally conductive and contains rigid bodies; The light emitting part is arranged on the body and includes a solid state light emitting element; a cover member configured to cover the light-emitting part, and includes a rigid body having thermal conductivity and light transmission; and an engaging unit includes a groove and a protrusion, and engages the body and the cover member, The heat generated by the solid-state light-emitting element is conducted to the cover member through the body and the engaging unit. 2. The lighting device according to claim 1, characterized in that, The groove portion of the engaging unit is formed on the body, The protrusion is formed on the cover member. 3. The lighting device according to claim 1 or 2, characterized in that, The cover member includes translucent ceramics, and the thickness of the translucent ceramics is formed non-uniformly. 4. A lighting fixture, characterized in that it comprises: the body of the appliance; and The lighting device according to any one of claims 1 to 3 installed on the appliance body.

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