CN209725878U - Lighting device - Google Patents

Abstract

The purpose is to provide a lighting device which is easy to change the design through sharing and sharing of parts and can prevent the falling of a spherical shell. The LED light source device is provided with an LED module (10) and a spherical shell (20) covering the LED module (10); the LED module (10) is provided with: a substrate (11) having a 1 st surface (11a) and a 2 nd surface (11b) opposite to the 1 st surface (11 a); and a light-emitting element (12) disposed on the 1 st surface (11a) of the substrate (11); a projection (21) is provided on the inner surface of the spherical shell (20), and the projection (21) projects to a position facing the 2 nd surface (11b) of the substrate (11).

Description

lighting device

technical field

The utility model relates to a lighting device having light-emitting elements such as light-emitting diodes (LED: Light Emitting Diode).

Background technique

Semiconductor light-emitting elements such as LEDs are used as light sources for various products because they are small, high-efficiency, and long-lived. For example, a lighting device (LED lighting) using an LED as a light source has been put into practical use.

As LED lighting, there are known structures with a base such as a bulb-type LED lamp (LED bulb) instead of a conventionally known bulb-type fluorescent lamp or an incandescent bulb, or a straight-tube LED lamp instead of a straight-tube type fluorescent lamp. In addition, lighting fixtures, such as a ceiling light, a downlight, and a spotlight, are known as LED lighting.

For example, a conventional LED light bulb includes a light-emitting module composed of a substrate and LED elements mounted on the substrate, a bulb covering the light-emitting module, a base for receiving AC power, and the AC power received by the base to generate light for the LED elements to emit light. The circuit unit of the direct current power, and the outer casing which accommodates the circuit unit (for example, refer to patent document 1).

Patent Document 1: Japanese Patent Laid-Open No. 2015-076281

Utility model content

However, in the conventional lighting device, it is difficult to realize the commonization and commonization of components, and it is not possible to easily change the design.

An object of the present invention is to provide an illuminating device that can be easily changed in design and that can prevent the drop of the spherical shell through the commonization and commonization of components.

In order to achieve the above object, a technical solution of the lighting device of the present invention includes: a light-emitting module; and a spherical shell covering the light-emitting module; the light-emitting module includes a substrate having a first surface and a surface opposite to the first surface. a second surface; and a light-emitting element arranged on the first surface of the substrate; and a protruding portion protruding to a position facing the second surface of the substrate on the inner surface of the spherical shell.

Furthermore, in the above-mentioned lighting device, the spherical shell may be configured to surround the entire circumference of the side surface of the substrate, and the substrate may have a protruding portion facing the protruding portion.

Furthermore, in the above-mentioned lighting device, the protruding portion may extend along the circumferential direction of the spherical shell.

Furthermore, in the above-mentioned lighting device, a first wall portion may be provided on the inner surface of the spherical shell, and the first wall portion may be provided on the side of the protruding portion and in one of the extending directions of the protruding portion. near the end.

Furthermore, in the above-mentioned lighting device, a second wall portion may be provided on the inner surface of the spherical shell, and the protrusion may be present along the circumferential direction of the spherical shell between the second wall portion and the protruding portion. the gap above the width of the part.

Furthermore, in the above-mentioned lighting device, a plurality of the above-mentioned protruding portions may be provided.

Further, in the lighting device, the spherical shell may have an arm portion extending in a thickness direction of the substrate from an opening end portion of the spherical shell, and the protruding portion may be provided on an inner surface of the arm portion.

In addition, in the above-mentioned lighting device, the spherical shell may be held on the substrate.

Further, in the lighting device, a convex portion may be provided on the outer peripheral surface of the spherical shell, and the convex portion may be located within a range of a marking portion provided on a part of the lighting device.

Further, the lighting device may further include: a base; a circuit unit that generates electric power for causing the light-emitting element to emit light from the electric power received by the base; and a case that accommodates the circuit unit.

Utility model effect

According to the present invention, since the commonization and commonization of components can be achieved, design changes can be easily made, and the drop of the spherical shell can be prevented.

Description of drawings

FIG. 1 is an external perspective view of an LED light bulb according to an embodiment.

2 is an exploded perspective view of the LED light bulb according to the embodiment.

3 is a cross-sectional view of the LED light bulb according to the embodiment.

4 is a perspective view showing a state in which the bulb of the LED light bulb according to the embodiment is removed.

5A is a half-cross-sectional perspective view of the spherical shell used in the LED light bulb according to the embodiment, as viewed obliquely from above.

5B is a half-cross-sectional perspective view of the spherical shell used in the LED light bulb according to the embodiment as viewed obliquely from below.

FIG. 6 is a partial cross-sectional view when the LED light bulb according to the embodiment is cut along a plane passing through the protruding portion of the spherical shell.

FIG. 7 is a diagram for explaining a method of attaching the bulb of the LED light bulb according to the embodiment.

8 is a cross-sectional view of an LED light bulb according to Modification 1. FIG.

FIG. 9 is a diagram for explaining a method of attaching the bulb of the LED light bulb according to Modification 2. FIG.

Label description

1. 1A, 1B LED bulb (lighting device)

10 LED module (light-emitting module)

11 Substrate

11a Side 1

11b side 2

11c Protrusion

12 Light-emitting elements

20, 20B spherical shell

20b Open end

21 Protrusions

22 1st wall

23 Second wall

24 convex

25 Arm

30 circuit units

40, 40A outer shell

43 Marks

50 lamp caps

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the embodiments described below all show a specific example of the present invention. Therefore, the numerical values, shapes, materials, constituent elements, arrangement and connection form of constituent elements, and steps and order of steps, etc. shown in the following embodiments are examples, and are not intended to limit the present invention. Therefore, among the components of the following embodiments, components not described in the independent claims representing the highest-level concept will be described as arbitrary components.

In addition, each figure is a schematic diagram, and is not necessarily shown strictly. In addition, in each figure, the same code|symbol is attached|subjected to the structure which has substantially the same function, and the overlapping description is abbreviate|omitted or simplified.

In the following embodiments, as an example of a lighting device, an LED light bulb, which is a substitute for a light bulb-type fluorescent lamp or an incandescent light bulb, will be described.

(Embodiment)

[LED bulb]

The overall structure of the LED light bulb 1 according to the embodiment will be described with reference to FIGS. 1 to 4 . FIG. 1 is an external perspective view of an LED light bulb 1 according to the embodiment. FIG. 2 is an exploded perspective view of the LED light bulb 1 . FIG. 3 is a cross-sectional view of the LED bulb 1 . FIG. 4 is a perspective view showing a state in which the bulb 20 of the LED light bulb 1 is removed.

As shown in FIGS. 1 to 4 , the LED light bulb 1 includes an LED module 10 , a spherical case 20 covering the LED module 10 , a circuit unit 30 that generates power for causing the LED module 10 to emit light, and an outer case that accommodates the circuit unit 30 . body 40 and lamp cap 50. As shown in FIG. 1 , the LED bulb 1 is composed of a spherical shell 20 , an outer shell 40 and a lamp cap 50 to form peripheral components.

Hereinafter, each component constituting the LED light bulb 1 will be described with reference to FIGS. 1 to 4 .

[LED module]

The LED module 10 is an example of a light emitting module that emits light of a predetermined color, for example, white light. The LED module 10 emits light by power supplied from the circuit unit 30 .

In this embodiment, the LED module 10 is fixed to the outer casing 40 . Specifically, the LED module 10 is fixed to the outer casing 40 so as to cover the first opening 40 a of the outer casing 40 .

As shown in FIGS. 2 to 4 , the LED module 10 includes a substrate 11 and a light-emitting element 12 arranged on the substrate 11 .

The substrate 11 is a mounting substrate for mounting the light-emitting element 12, and as shown in FIG. That is, the second surface 11b is a surface facing away from the first surface 11a. The substrate 11 is, for example, a plate-shaped substrate that is substantially circular as a whole in plan view, but the shape of the substrate 11 is not limited to this, and may be a polygon such as a rectangle or the like. In addition, although the thickness of the board|substrate 11 is 0.5 mm - 5 mm as an example, it is not specifically limited.

As shown in FIGS. 2 and 4 , protruding portions 11 c are provided at the ends of the substrate 11 . The protruding portion 11 c is formed so as to protrude outward from the end portion of the substrate 11 in a plan view of the substrate 11 . The projection part 11c is a part of the board|substrate 11, and has the 1st surface 11a and the 2nd surface 11b. Although the details will be described later, the protruding portion 11 c faces the protruding portion 21 provided on the inner surface of the spherical shell 20 . Specifically, the second surface 11 b of the protruding portion 11 c faces the protruding portion 21 of the spherical shell 20 . Although the planar view shape of the protrusion part 11c is a rectangle, for example, it is not limited to this. The shape of the protruding portion 11c may be any shape as long as at least a part thereof faces the protruding portion 21 of the spherical shell 20 .

In the present embodiment, a plurality of protrusions 11c are provided. Specifically, the substrate 11 is provided with two protrusions 11c. The two protruding portions 11c are provided in opposing positions. That is, the two protrusions 11c are provided at an interval of about 180°. In addition, the perimeter of the protruding portion 11c is marked with a triangular mark so that it can be easily identified as the protruding portion 11c.

As shown in FIG. 3 , the substrate 11 is fixed to the outer casing 40 in a state where the second surface 11 b is in contact with the outer casing 40 . Specifically, as shown in FIGS. 2 and 3 , the mounting portion 41 is provided in the vicinity of the first opening portion 40 a of the outer casing 40 , and the substrate 11 is formed to cover the first opening portion 40 a of the outer casing 40 . The method is placed on the placement portion 41 . That is, the substrate 11 is supported by the mounting portion 41 of the outer casing 40 .

In addition, the substrate 11 is provided with a through hole 11d. A screw 60 for fixing the substrate 11 and the outer case 40 is inserted through the through hole 11d. In this embodiment, since the base plate 11 and the outer casing 40 are fixed by the three screws 60, the base plate 11 is provided with three through holes 11d.

As the substrate 11 , for example, a metal base substrate obtained by applying an insulating coating to a base material made of a metal material such as aluminum or copper, a ceramic substrate that is a sintered body of a ceramic material such as alumina, or a resin made of a resin material are used. substrate, etc. From the viewpoint of dissipating heat generated by the light-emitting element 12, it is preferable to use a metal base substrate having the highest thermal conductivity among them. In addition, although the board|substrate 11 is a rigid board|substrate, a flexible board|substrate may be sufficient.

Moreover, as shown in FIG.2 and FIG.3, the connector 13 is provided as a power supply part in the center part of the 1st surface 11a of the board|substrate 11. FIG. The connector 13 has a pair of conductive members 13a, and an insulating member 13b that holds the pair of conductive members 13a. A part of the insulating member 13b of the connector 13 penetrates the board 11, and the connector plug 33a is connected to the conductive member 13a by inserting the connector plug 33a led out from the circuit unit 30 into the insulating member 13b. In addition, although not shown, on the first surface 11a of the substrate 11, a metal wiring (not shown) for electrically connecting the conductive member 13a of the connector 13 and the light-emitting element 12 is formed.

The light-emitting element 12 is arranged on the first surface 11 a of the substrate 11 . In the present embodiment, the plurality of light emitting elements 12 are mounted on the substrate 11 in an annular arrangement. In addition, in this embodiment, six light-emitting elements 12 are mounted, but the number of mounted light-emitting elements 12 is not limited to this, and may be one.

The light-emitting element 12 of the present embodiment is an individually packaged surface mount (SMD: Surface Mount Device) type LED element, and as shown in FIG. 4 , has a container (package) 12 a and an LED chip 12 b mounted once in the container 12 a. , and a sealing member 12c for sealing the LED chip 12b. The light-emitting element 12 , which is an SMD-type LED element, is mounted on the substrate 11 twice.

The container 12a is a resin molded product or a white ceramic molded product made of white resin, and has a concave portion (cavity) in the shape of an inverted truncated cone. The inner surface of the recessed portion is inclined, and is configured to reflect the light from the LED chip 12b upward.

The LED chip 12b is mounted on the bottom surface of the concave portion of the container 12a. The LED chip 12b is an example of a semiconductor light-emitting element that emits light by a predetermined DC power, and is a bare chip that emits monochromatic visible light. The LED chip 12b is, for example, a blue LED chip that emits blue light when energized.

The sealing member 12c is a translucent insulating resin material such as silicone resin. The sealing member 12c of this embodiment contains a fluorescent substance as a wavelength conversion material which converts the wavelength of the light from the LED chip 12b. That is, the sealing member 12c is a phosphor-containing resin containing a phosphor in a translucent resin, and converts the wavelength (color-conversion) of light from the LED chip 12b to a predetermined wavelength. The sealing member 12c is filled in the concave portion of the container 12a.

As the sealing member 12c, for example, when the LED chip 12b is a blue LED chip, in order to obtain white light, a phosphor-containing substance obtained by dispersing YAG (yttrium aluminum garnet)-based yellow phosphor particles in a silicone resin can be used. resin. As a result, the yellow phosphor particles are excited by the blue light of the blue LED chip to emit yellow light, so that the sealing member 12c emits the yellow light from the yellow phosphor particles and the blue light from the blue LED chip as composite light of the yellow light from the yellow phosphor particles and the blue light from the blue LED chip. Release white light. In addition, in the sealing member 12c, a light diffusing material such as silicon oxide, a filler, and the like may be dispersed.

The plurality of light-emitting elements 12 configured in this way are connected in series, for example, and emit light by the DC power supplied from the circuit unit 30 via the connector 13 . In addition, the form of connection of the plurality of light-emitting elements 12 (series connection, parallel connection, and a combination of series connection and parallel connection, etc.) are not particularly limited.

[spherical shell]

As shown in FIGS. 2 to 4 , the globe 20 is an example of a translucent cover covering the LED module 10 . The spherical shell 20 is a hollow member having an opening 20a, and has a substantially hemispherical shape in which the top portion on the opposite side of the opening 20a is closed. In addition, the shape of the spherical shell 20 is not limited to a substantially hemispherical shape, and may be a semi-elliptical shape or the like, and may be the same shape as a normal bulb-type fluorescent lamp or an incandescent light bulb (type A, type G, or type G specified by JIS C7710). Type E, etc.).

The globe 20 is configured to take out the light emitted from the LED module 10 (light emitting element 12 ) to the outside of the lamp. That is, the light of the LED module 10 incident on the inner surface of the spherical shell 20 transmits through the spherical shell 20 and is taken out to the outside of the spherical shell 20 .

As the material of the spherical shell 20, a translucent material made of a resin material such as polycarbonate or acrylic, a glass material such as silica glass, or the like can be used.

In addition, the spherical shell 20 may be a diffuser cover having light diffusing properties (light diffusing properties). For example, the spherical shell 20 can be provided with light diffusing properties by dispersing a light-diffusing material such as light-reflecting fine particles in a light-transmitting resin material to produce the spherical shell 20 . By imparting light diffusivity to the spherical shell 20, the light incident from the LED module 10 to the spherical shell 20 can be diffused, so that the light distribution angle can be increased. In addition, since LEDs have strong light directivity, if LEDs are used as the light source of the light-emitting elements 12, graininess (uneven brightness) occurs due to the plurality of light-emitting elements 12. However, by imparting light diffusivity to the spherical shell 20, Graininess caused by the plurality of light-emitting elements 12 can be suppressed.

In addition, in the case where the spherical shell 20 has light diffusivity, it is not limited to the structure in which the light diffusing material is dispersed in the inside of the light-transmitting member. For example, the spherical shell 20 may be formed by forming a milky white light-diffusing film containing a light-diffusing material or the like on the surface (inner surface or outer surface) of the spherical shell 20 , or by embossing processing or the like instead of using the light-diffusing material. The surface of the spherical shell 20 is formed with micro unevenness, or a dot pattern is printed on the surface of the spherical shell 20, so that the spherical shell 20 has light diffusivity.

In the present embodiment, the spherical shell 20 is a milky white diffuser cover formed by injection molding using a light-transmitting resin material in which a light-diffusing material is dispersed. In addition, it is also possible to make the spherical shell 20 transparent without making the spherical shell 20 have the light diffusion function, so that the LED module 10 inside can be recognized.

As shown in FIG. 3 , in the present embodiment, the spherical shell 20 is configured to cover the entire LED module 10 . That is, the spherical shell 20 covers the substrate 11 and the light-emitting element 12 . Specifically, the spherical shell 20 is configured to surround the entire circumference of the side surface of the substrate 11 , and the opening end 20 b of the spherical shell 20 exists at a position beyond the substrate 11 .

Here, the specific shape of the spherical shell 20 will be described with reference to FIG. 4 and using FIGS. 5A , 5B and 6 . 5A and 5B are perspective views showing a half cross-section of the bulb 20 used in the LED light bulb 1 according to the embodiment. FIG. 5A shows a state when the spherical shell 20 is viewed obliquely from above, and FIG. 5B shows a state when the spherical shell 20 is viewed obliquely from below. FIG. 6 is a partial cross-sectional view of the LED light bulb 1 cut along a plane passing through the protruding portion 21 of the spherical shell 20 . In addition, in FIG. 5A, the structure of the periphery of the protrusion part 11c of the board|substrate 11 is shown by the dotted line. In addition, the circuit unit 30 is omitted in FIG. 6 .

As shown in FIGS. 5A and 5B , the inner surface of the spherical shell 20 is provided with a protruding portion 21 that protrudes to a position facing the second surface 11 b of the substrate 11 of the LED module 10 . As shown in FIGS. 5A and 6 , the protruding portion 21 faces the protruding portion 11 c provided on the substrate 11 . Specifically, the protruding portion 21 has a flat surface facing the second surface 11b of the protruding portion 11c.

A plurality of protrusions 21 are provided. Specifically, the protrusions 21 are provided in the same number as the protrusions 11c of the substrate 11. In the present embodiment, as shown in FIG. 4, two protrusions 21 are provided on the inner surface of the spherical shell 20. The two protrusions 21 is set in the opposite position. That is, the two protrusions 21 are provided at an interval of about 180°.

As shown in FIGS. 5A and 5B , each protruding portion 21 extends along the circumferential direction of the spherical shell 20 , and is formed as a protrusion on the inner surface of the spherical shell 20 . Specifically, the protruding portion 21 extends in the circumferential direction of the opening portion 20 a along the opening end portion 20 b of the opening portion 20 a of the spherical shell 20 . In addition, the end surface of the protruding portion 21 on the substrate 11 side is flush with the end surface of the opening end portion 20 b of the spherical shell 20 . In addition, although the length of the extension direction of the protrusion part 21 is 5 mm - 10 mm, for example, it is not limited to this. Further, the length in the extending direction of the protruding portion 21 is preferably longer than the width of the protruding portion 11 c of the substrate 11 . As an example, the cross-sectional shape of the protruding portion 21 with the extending direction of the protruding portion 21 as a normal line is a rectangle, but it is not limited to this.

As shown in FIGS. 5A and 5B , the inner surface of the spherical shell 20 is further provided with a first wall portion 22 and a second wall portion 23 . The first wall portion 22 and the second wall portion 23 extend along the inner surface of the spherical shell 20 in a direction away from the opening end portion 20 b of the spherical shell 20 . Specifically, it extends linearly in the direction from the end surface of the opening end portion 20 b of the spherical shell 20 toward the top of the spherical shell 20 .

Like the protruding portion 21 , the first wall portion 22 and the second wall portion 23 are formed as protrusions on the inner surface of the spherical shell 20 . The protruding amount (height) of the first wall portion 22 and the second wall portion 23 relative to the inner surface of the spherical shell 20 is the same as the protruding amount (height) of the protruding portion 21 relative to the inner surface of the spherical shell 20, but not limited to this . Although the protrusion amount (height) of the protrusion part 21, the 1st wall part 22, and the 2nd wall part 23 is 1 mm - 5 mm as an example, it is not limited to this.

As shown in FIG. 5A , the first wall portion 22 is located on the side of the protruding portion 11 c of the substrate 11 of the LED module 10 , and is provided in the vicinity of one end portion in the extending direction of the protruding portion 21 of the spherical shell 20 . In the present embodiment, the protruding portion 21 and the first wall portion 22 are continuously formed along the inner surface of the spherical shell 20 . Specifically, the protruding portion 21 and the first wall portion 22 are integrally formed so that the side view shapes of the protruding portion 21 and the first wall portion 22 are L-shaped. Therefore, the cross-sectional shapes of the protruding portion 21 and the first wall portion 22 are the same.

The second wall portion 23 is formed so as to have a gap G along the circumferential direction of the spherical shell 20 between the second wall portion 23 and the protruding portion 21 of the spherical shell 20 . Specifically, the second wall portion 23 is formed to have a gap G between the second wall portion 23 and the other end portion in the extending direction of the protruding portion 21 . The gap G is equal to or larger than the width of the protruding portion 11c so that the protruding portion 11c of the substrate 11 can pass therethrough. In this way, between the second wall portion 23 and the protruding portion 21 , a gap G larger than the width of the protruding portion 11 c exists along the circumferential direction of the spherical shell 20 .

The details will be described later, but the spherical case 20 configured in this way is fixed to the outer casing 40 in combination with the LED module 10 . In the present embodiment, the spherical shell 20 is combined with the substrate 11 by rotating the spherical shell 20 horizontally. At this time, as shown in FIGS. 1 , 2 and 4 , the convex portion 24 is provided on the outer surface of the spherical shell 20 so that the spherical shell 20 can be correctly rotated visually. That is, with the convex portion 24 provided on the outer surface of the spherical shell 20, it can be confirmed whether the spherical shell 20 is correctly combined with the LED module 10 or not. Specifically, as shown in FIG. 1 , when the spherical shell 20 is combined with the LED module 10 , the convex portion 24 of the spherical shell 20 is provided at a position corresponding to the marking portion 43 provided on the outer casing 40 . As an example, the convex portion 24 is formed as a protrusion so as to extend in a direction away from the opening end portion 20 b of the spherical shell 20 along the outer surface of the spherical shell 20 .

[circuit unit]

The circuit unit 30 shown in FIGS. 2 and 3 is a drive circuit for causing the LED module 10 (light emitting element 12 ) to emit light. That is, the circuit unit 30 supplies the LED module 10 with electric power for causing the LED module 10 to emit light. In the present embodiment, the circuit unit 30 is a lighting circuit for turning on and off the LED module 10 , and constitutes a power supply unit (power supply circuit). The circuit unit 30 converts, for example, AC power supplied from the base 50 into DC power, and supplies the DC power to the LED module 10 . The LED module 10 (light emitting element 12 ) is turned on or off by the DC power supplied from the circuit unit 30 (lighting circuit).

The circuit unit 30 has a circuit board 31 and a plurality of electronic parts 32 mounted on the circuit board 31 . The circuit unit 30 is arranged between the LED module 10 and the base 50 . Specifically, the circuit unit 30 is accommodated in the outer casing 40 . The circuit unit 30 is held by the outer casing 40 by locking the circuit board 31 to a locking portion provided on the inner surface of the outer casing 40 . In addition, the fixing mechanism of the circuit board 31 is not limited to this, and the circuit board 31 may be fixed to the outer casing 40 with screws or the like.

The circuit board 31 is a printed circuit board (PCB) in which metal wiring such as copper foil is formed on one surface (soldering surface). The plurality of electronic parts 32 mounted on the circuit board 31 are electrically connected to each other through metal wirings formed on the circuit board 31 .

An output terminal 33 and an input terminal (not shown) are provided on the circuit board 31 . The output terminal 33 is provided with a connector pin 33a. The connector pins 33 a are mechanically and electrically connected to the conductive members 13 a of the connector 13 provided on the substrate 11 of the LED module 10 . On the other hand, a pair of lead wires (not shown) are connected to the input terminals. The other ends of the pair of lead wires connected to the input terminals are connected to the base 50 .

The circuit board 31 is arranged, for example, in a posture (vertical arrangement) substantially parallel to the cylindrical axis of the outer casing 40 . In addition, the circuit board 31 is not limited to the vertical arrangement, and may be arranged in a posture (horizontal arrangement) in which the main surface of the circuit board 31 and the cylindrical axis of the outer casing 40 are substantially orthogonal. In addition, the metal wiring formed on the circuit board 31 may be formed not only on one side (single side) of the circuit board 31 but on both sides of the circuit board 31 . That is, the circuit board 31 may be a double-sided wiring board.

The electronic components 32 mounted on the circuit board 31 are a plurality of circuit elements for lighting the LED module 10, for example, capacitive elements such as electrolytic capacitors and ceramic capacitors, resistive elements such as resistors, rectifier circuit elements, coil elements, Choke coils (choke transformers), noise filters, diodes, semiconductor elements such as integrated circuit elements, etc.

Insulation is ensured by accommodating the circuit unit 30 thus constituted in the outer casing 40 constituted by an insulating resin material. In addition, in order to control the light emission state of the LED module 10 , a light control circuit such as a dimming circuit, a color adjustment circuit, or a wireless communication circuit may be combined with the circuit unit 30 .

[Outer shell]

As shown in FIGS. 2 and 3 , the outer casing 40 is a cylindrical body having a first opening 40a provided on the spherical shell 20 side and a second opening 40b provided on the base 50 side. The outer diameter of the first opening 40a is larger than the outer diameter of the second opening 40b, and the cylindrical body constituting the outer casing 40 has a substantially cylindrical shape whose outer diameter gradually changes. The outer case 40 constitutes an outer part of the LED light bulb 1, and the outer surface of the outer case 40 is exposed to the outside (in the atmosphere). In addition, the outer casing 40 is arranged between the spherical shell 20 and the base 50 .

In this embodiment, the outer case 40 also functions as a support member for supporting the LED module 10 . The LED module 10 is fixed to the outer casing 40 and supported by the outer casing 40 .

Specifically, as shown in FIGS. 2 to 4 , the first opening 40 a of the outer casing 40 is provided with a mounting portion 41 having a mounting portion for mounting the substrate 11 of the LED module 10 . face 41a. The second surface 11b of the substrate 11 is in surface contact with the mounting surface 41a.

The mounting portion 41 of the outer casing 40 is provided with a screw hole 41 b extending in the cylindrical axis direction of the outer casing 40 . The base plate 11 and the outer casing 40 are fixed by screwing the screws 60 inserted into the through holes 11d of the base plate 11 into the screw holes 41b. The screw 60 is, for example, a metal screw.

Moreover, the annular groove part 42 is formed in the outer side of the mounting part 41 of the 1st opening part 40a of the outer casing 40. As shown in FIG. The open end portion 20b of the spherical shell 20 is inserted into the groove portion 42 . As shown in FIG. 3 , the spherical shell 20 and the outer shell 40 are fixed to each other by the adhesive 70 filled in the groove portion 42 . As the adhesive 70 filled in the groove portion 42, for example, an adhesive made of silicone resin is used.

The outer casing 40 is provided with a marking portion 43 . The marking portion 43 is provided at a position corresponding to the convex portion 24 provided on the outer surface of the spherical shell 20 , and functions as a positioning portion when the spherical shell 20 and the LED module 10 (substrate 11 ) are combined. In this embodiment, the marking part 43 is a notch part provided in the opening end part of the 1st opening part 40a side of the outer casing 40, and is formed in the position which can be recognized from an external appearance. The marking portion 43 may be formed by, for example, performing laser marking after molding the outer case 40 , or may be formed at the time of injection molding the outer case 43 . The marking portion 43 is in the shape of a horizontally long slit, and in this embodiment, the horizontal width of the marking portion 43 is wider than the horizontal width of the convex portion 24 of the spherical shell 20 .

Moreover, the screwing part for attaching the base 50 is formed in the outer surface of the 2nd opening part 40b. The base 50 is screwed into the second opening 40b.

The outer casing 40 is thermally bonded to the LED module 10 in the first opening 40a. That is, the outer case 40 also functions as a heat dissipation member (heat sink) that dissipates heat generated by the LED module 10 . Therefore, in order to efficiently dissipate heat generated by the LED module 10 (light emitting element 12 ), the outer case 40 is preferably made of a material with high thermal conductivity, such as a metal material or a highly thermally conductive resin material. For example, the outer casing 40 may be composed of a material having a higher thermal conductivity than the substrate 11 . In this embodiment, the outer casing 40 is made of resin, and is formed of an insulating resin material such as polybutylene terephthalate (PBT), for example. In addition, the outer casing 40 is an integrally molded product.

As shown in FIG. 3 , the circuit unit 30 is arranged inside the outer casing 40 . Therefore, the outer casing 40 can also dissipate heat generated by the circuit unit 30 . In this embodiment, the outer casing 40 directly surrounds the circuit unit 30 . That is, the outer casing 40 also functions as a circuit box (insulation box) that insulates and protects the circuit unit 30 .

[lamp head]

The base 50 shown in FIGS. 2 and 3 is a power receiving unit that receives electric power for causing the LED module 10 (light emitting element 12 ) to emit light from the outside of the lamp. The base 50 is mounted on the outer casing 40 .

On the inner peripheral surface of the base 50, a screwing portion for screwing with a screwing portion formed in the second opening portion 40b of the outer casing 40 is formed. The base 50 is externally fitted to the outer casing 40 by the screwing portion screwed into the second opening portion 40b.

The LED light bulb 1 is attached to the fixture body by attaching the base 50 to the socket of the fixture body of the lighting fixture, for example. Specifically, the outer peripheral surface of the base 50 is formed with a screwing portion for screwing with the socket of the fixture body. By attaching the base 50 to the socket of the appliance body, the base 50 is brought into a state capable of receiving electric power from the appliance body. The base 50 is supplied with AC power, for example, from a commercial power source. The base 50 of the present embodiment receives AC power through two contacts, and the power received by the base 50 is input to the input terminal of the circuit unit 30 via a pair of lead wires.

The base 50 is, for example, a metal bottomed cylindrical shape, and as shown in FIG. The insulating portion 52 is formed of, for example, cullet. One of the pair of lead wires connected to the circuit unit 30 is connected to the shell portion 51 of the base 50 , and the other is connected to the eyelet portion 53 of the base 50 .

The type of the base 50 is not particularly limited, but in the present embodiment, a screw-in Edison type (E type) base is used. For example, as the base 50, E26 type, E17 type, or E16 type, etc. are mentioned. In addition, the base 50 may not be a screw type but a Swan type (plug-in type).

[Installation method of spherical shell]

Next, a method of attaching the spherical shell 20 will be described with reference to FIGS. 3 and 4 and using FIG. 7 . FIG. 7 is a diagram for explaining a method of attaching the bulb 20 of the LED light bulb 1 according to the embodiment. In addition, in FIG. 7, only the LED module 10 and the spherical housing 20 are shown.

First, as shown in FIGS. 3 and 4 , after the circuit unit 30 is accommodated in the outer casing 40 , the LED module 10 is fixed to the outer casing 40 . Specifically, the through holes 11 d of the substrate 11 of the LED module 10 are aligned with the screw holes 41 b of the outer case 40 , and the substrate 11 is placed on the placement surface 41 a of the placement portion 41 of the outer case 40 . , insert the screw 60 into the through hole 11 d of the base plate 11 and screw the screw 60 into the screw hole 41 b of the outer casing 40 . As a result, the substrate 11 is screwed to the outer casing 40 , and the LED module 10 can be fixed to the outer casing 40 .

Next, as shown in FIGS. 7( a ) and ( b ), the protruding portion 11 c of the base plate 11 is inserted into the gap G between the protruding portion 21 of the spherical shell 20 and the second wall portion 23 , and the spherical shell 20 is moved toward the gap G. The substrate 11 is embedded. At this time, as shown in FIG. 3 , the opening end portion 20 b of the spherical shell 20 is inserted into the groove portion 42 of the outer casing 40 .

Next, as shown in FIG.7(c), the spherical shell 20 is rotated horizontally in a predetermined direction. Specifically, the spherical shell 20 is rotated until the protruding portion 21 of the spherical shell 20 moves to a position facing the protruding portion 11 c of the substrate 11 . In this embodiment, the spherical shell 20 is rotated horizontally in a right-handed direction.

At this time, since the spherical shell 20 is provided with the first wall portion 22 , when the spherical shell 20 is rotated, the protruding portion 11 c of the base plate 11 comes into contact with the first wall portion 22 . That is, the first wall portion 22 functions as a stopper for preventing the rotation of the spherical shell 20 so that the spherical shell 20 cannot be rotated beyond a certain level. In this way, the spherical shell 20 is configured to be rotatable only to a position where the first wall portion 22 abuts on the protruding portion 11 c of the base plate 11 . In addition, it can be seen that when the spherical shell 20 is rotated and the first wall portion 22 abuts on the protruding portion 11c of the substrate 11, the protruding portion 21 of the spherical shell 20 moves to a position facing the protruding portion 11c of the substrate 11. In addition, in this embodiment, since the length in the extending direction of the protruding portion 21 is 5 mm to 10 mm, the maximum rotation amount (maximum rotation angle) of the spherical shell 20 is set small, and the rotation amount of the spherical shell 20 is suppressed.

In addition, in the present embodiment, since the second wall portion 23 is provided in the spherical shell 20 , when the spherical shell 20 is rotated in a direction opposite to the predetermined direction, the second wall portion 23 abuts against the protrusion of the base plate 11 . Section 11c. That is, the second wall portion 23 functions as a stopper that prevents the spherical shell 20 from rotating in the reverse direction, and the spherical shell 20 is configured not to rotate in the reverse direction. In this embodiment, the spherical shell 20 cannot be rotated in a left-handed direction.

In addition, in the present embodiment, since the convex portion 24 is provided on the outer surface of the spherical shell 20 , it can be confirmed whether the spherical shell 20 is correctly rotated through the convex portion 24 . Specifically, if the convex portion 24 of the spherical shell 20 is located within the range of the lateral width W of the marking portion 43 of the outer casing 40 , it can be determined that the spherical shell 20 is rotated to the correct position.

In this way, in the LED light bulb 1 of the present embodiment, the bulb 20 is fixed by the LED module 10 . Specifically, the relative positional relationship with the LED module 10 is determined by combining the spherical shell 20 with the LED module 10 .

In addition, although not shown, when the spherical housing 20 is mounted on the LED module 10 , the adhesive 70 is applied to the groove portion 42 of the outer case 40 . Thereby, the spherical shell 20 can be fastened to the outer casing 40 by the adhesive 70 .

[Effect, etc.]

Next, the structure and the effect which are the characteristic of the LED light bulb 1 of this embodiment are demonstrated including the reason for this invention.

In recent years, the external dimensions of LED light bulbs have been reduced to the same size as incandescent light bulbs. Therefore, when developing new products or when preparing various series of different wattages, the commonization/commonization of outer casings is studied, and the product design of LED bulbs is to be carried out by changing only the design of LED modules and spherical casings. demand has increased.

On the other hand, if the spherical housing is detached after the LED light bulb is attached to a lighting fixture or the like, the spherical housing may fall. In this case, even if an adhesive is used to fasten the spherical shell to the outer casing, the fastening force may be weakened due to deterioration of the adhesive or the like, and the spherical shell may be detached. Therefore, in order to prevent the spherical shell from falling, a drop prevention structure in which the spherical shell is provided in the LED light bulb has been studied. In this case, it is conceivable to provide an anti-drop structure of the spherical shell on the outer casing. However, if the outer shell is provided with a drop preventing structure of the spherical shell, it is difficult to realize the commonality/commonization of components.

Therefore, as a result of intensive research, the present inventors have found a structure in which the spherical shell 20 can be prevented from falling while realizing the commonality and sharing of components by using the LED module 10 covering the LED module 10 .

Specifically, in the LED light bulb 1 of the present embodiment, as shown in FIGS. 4 and 6 , the inner surface of the spherical shell 20 is provided with a position protruding to face the second surface 11 b of the substrate 11 of the LED module 10 . the protrusion 21.

With this configuration, even if the bulb 20 is detached after the LED bulb 1 is attached to a lighting fixture or the like, the projection 21 of the bulb 20 is caught on the substrate 11 , so that the bulb 20 can be prevented from falling. That is, the protruding portion 21 of the spherical shell 20 is a hooking portion that is hooked to the base plate 11 , and functions as a drop prevention structure of the spherical shell 20 .

In addition, by realizing the anti-drop structure of the spherical shell 20 by the LED module 10 and the spherical shell 20, the commonization/commonization of the components constituting the LED light bulb 1 can be easily realized.

Specifically, in the LED light bulb, the LED module 10 and the bulb 20 determine optical characteristics such as light distribution characteristics. Therefore, when designing a product of an LED light bulb, it is sufficient to only change the design of the LED module 10 and the spherical housing 20, and therefore it is not necessary to change the shapes of components other than the LED module 10 and the spherical housing 20 (the outer casing 40, etc.). and dimensions, etc., the common/commonization of components such as the outer casing 40 can be realized.

Conversely, the LED module 10 and the spherical shell 20, which are the main factors of the optical characteristics of the LED light bulb, can be made into one module, and the common/common use of components can also be achieved. That is, by using the LED module 10 and the spherical shell 20 as a single module and applying the LED module 10 and the spherical shell 20 to the outer casing 40 or the like having different shapes or sizes, various types of LED light bulbs can be easily obtained.

For example, instead of directly fixing the LED module 10 to the outer casing 40 as described above, a cup-shaped heat sink 80 may be arranged in the outer casing 40A as in the LED light bulb 1A shown in FIG. 8 . The LED module 10 is placed and fixed thereon. In the LED light bulb 1A shown in FIG. 8 , the same LED module 10 and the bulb 20 as the LED light bulb 1 of the above-described embodiment are used. That is, the LED module 10 and the dome 20 are shared/shared as one module. In addition, the circuit unit 30 is omitted in FIG. 8 .

As described above, according to the LED light bulb 1 according to the present embodiment, since the commonality and commonization of components can be achieved, design changes can be easily made, and the drop of the bulb 20 can be prevented. Specifically, the drop prevention structure can be realized only by the LED module 10 and the spherical shell 20 . In addition, by realizing the commonality and commonization of parts, investment in molds can be kept to a minimum.

Further, in the LED light bulb 1 of the present embodiment, the spherical shell 20 is configured to surround the entire circumference of the side surface of the substrate 11 , and the substrate 11 has the protruding portion 11 c facing the protruding portion 21 of the spherical shell 20 . Furthermore, the protruding portion 21 of the spherical shell 20 extends along the circumferential direction of the spherical shell 20 .

With this configuration, the spherical shell 20 surrounds the entire side surface of the substrate 11 , but by rotating the spherical shell 20 horizontally, the protruding portion 11 c of the substrate 11 and the protruding portion 21 of the spherical shell 20 can be easily opposed. That is, although the entire board 11 is covered by the spherical shell 20 , the spherical shell 20 and the LED module 10 can easily realize the drop prevention structure of the spherical shell 20 .

In addition, in this embodiment, the protrusion part 21 of the spherical shell 20 is provided in plurality.

With this structure, the LED light bulb 1 can be provided with a plurality of anti-drop structures for the spherical shells 20 , so that the spherical shells 20 can be more reliably prevented from falling.

In addition, in the present embodiment, as shown in FIG. 6 , there may be a gap between the protruding portion 11 c of the substrate 11 and the protruding portion 21 of the spherical shell 20 , although the protruding portion 11 c of the substrate 11 and the protruding portion of the spherical shell 20 may have a gap. 21 is not in contact, but the protruding portion 11c of the substrate 11 is brought into contact with the protruding portion 21 of the spherical shell 20 .

In this case, it is preferable that the spherical shell 20 is held by the base plate 11 . That is, it is preferable that the spherical shell 20 is fixed to the base plate 11 . For example, the protruding portion 21 of the spherical shell 20 may have a claw structure, and the spherical shell 20 may be fixed to the substrate 11 by engaging the protruding portion 21 with the protruding portion 11 c of the substrate 11 .

With this configuration, the optical characteristics determined by the LED module 10 and the bulb 20 can be suppressed from varying for each LED bulb. Therefore, it is possible to easily realize an LED light bulb having the same optical characteristics although the shape and size of the outer casing and the like are different, and the external shape and the like are different.

(Variation)

As mentioned above, although the lighting device concerning this invention was demonstrated based on embodiment, this invention is not limited to the said embodiment.

For example, in the above-described embodiment, the protruding portion 21 of the spherical shell 20 is provided on the inner surface of the opening end portion 20b of the spherical shell 20, but it is not limited thereto. Specifically, as in the LED bulb 1B shown in FIG. 9 , the protruding portion 21 of the spherical shell 20B may be provided on the inner surface of the arm portion 25 extending in the thickness direction of the substrate 11 from the opening end 20b of the spherical shell 20B. In this case, the spherical shell 20B may be combined with the base plate 11 by horizontally rotating the spherical shell 20 as in the above-described embodiment, but as shown in FIG. 11 is pushed in and assembled to the base plate 11 so that the end portion 11e of the base plate 11 faces the protruding portion 21 of the spherical shell 20B. In this modification, the protrusion 21 of the spherical shell 20B may have a claw structure, and the spherical shell 20B may be fixed to the board 11 by engaging the protrusion 21 with the end of the board 11 . Thereby, the spherical shell 20B can be locked to the substrate 11 by being snapped in. In this case, the end portion 11e of the substrate 11 may be formed in a protruding shape like the protruding portion 11c of the above-described embodiment, but it does not need to be formed in a protruding shape. That is, a disk-shaped substrate 11 having no unevenness at the end portion may be used.

In addition, in the above-described embodiment, the number of the protruding portions 21 of the spherical shell 20 is two, but the present invention is not limited to this. For example, only one protrusion 21 may be sufficient, or three or more may be sufficient. In addition, when a plurality of protrusions 21 are provided, the plurality of protrusions 21 may be provided at equal intervals along the circumferential direction of the spherical shell 20 .

In addition, in the above-described embodiment, in order to determine that the spherical shell 20 is rotated to the correct position, the notch portion is provided in the outer casing 40 as the marking portion 43 corresponding to the convex portion 24 of the spherical shell 20, but the present invention is not limited to this. . That is, although the marking part 43 for positioning of the spherical shell 20 is a notch part, it is not limited to this. For example, the marking portion for positioning the spherical shell 20 may be a convex portion provided on the outer casing 40 , or may be a convex portion or a concave portion provided on a component of the LED bulb 1 other than the outer casing 40 . In addition, the marking portion for positioning the spherical shell 20 is not limited to the structure or shape of the protrusions formed on the components of the LED bulb 1, and may be a pair of components constituting the LED as long as it can be visually recognized when the spherical shell 20 is mounted. Patterns, colors, seals, and the like are given to the parts of the bulb 1 (the outer casing 40 and the like). That is, whether or not the spherical shell 20 is correctly rotated can be confirmed by whether or not the convex portion 24 of the spherical shell 20 is located within the range of the marking portion provided on a part of the LED light bulb 1 .

In addition, in the above-mentioned embodiment, the LED light bulb was described as an example of the lighting device, but the present invention can also be applied to a straight tube LED lamp instead of a straight tube type fluorescent lamp, or a flat type having a GX53 base or a GH76p base, etc. LED lights, etc., LED lights with other lamp caps.

In addition, in the above-mentioned embodiment, the lighting device with a base attached to a lighting fixture and used as an example of the lighting device has been described. The lighting device according to the present invention can also be realized as a lighting fixture itself. As such a lighting apparatus, lighting fixtures, such as a downlight, a spotlight, a ceiling light, and a desk lamp installed in a ceiling etc. are mentioned.

In addition, in the above-described embodiment, the light-emitting element 12 is assumed to be an SMD-type LED element, but it is not limited to this. For example, a COB (Chip On Board) type LED module in which a bare chip is directly mounted (once mounted) on a substrate may be used. That is, the LED chip itself may be used as the light-emitting element 12 . In this case, a plurality of LED chips may be sealed together or individually with the sealing member. The sealing member contains a wavelength conversion material such as a yellow phosphor as described above.

In addition, in the above-described embodiment, the light-emitting element 12 is assumed to be a BB-Y type white LED element that emits white light through a blue LED chip and a yellow phosphor, but it is not limited to this. For example, it is also possible to use a phosphor-containing resin containing a red phosphor and a green phosphor, and combine it with a blue LED chip to emit white light. Further, for the purpose of improving color rendering properties, a red phosphor or a green phosphor may be mixed in addition to the yellow phosphor. In addition, an LED chip emitting a color other than blue may be used. For example, an ultraviolet LED chip that emits ultraviolet light having a wavelength shorter than that of blue light emitted by a blue LED chip may be used. The blue phosphor, green phosphor, and red phosphor of blue light, red light, and green light emit white light.

In addition, in the above-mentioned embodiment, the LED module 10 may be configured to be capable of dimming control and/or color adjustment control. For example, the LED module 10 can perform RGB control by including a red LED light source that emits red light, a green LED light source that emits green light, and a blue LED light source that emits blue light. Thereby, an LED module capable of color-adjustment control can be realized.

In addition, in the above-described embodiment, the LED is exemplified as the light source of the light-emitting element 12 , but other solid-state light-emitting elements such as semiconductor lasers and other solid-state light-emitting elements, organic EL (Electro Luminescence), and inorganic EL may also be used.

In addition to the above, the above-described embodiments and modified examples can be subjected to various modifications that those skilled in the art can think of, or configurations in the above-described embodiments and modified examples without departing from the gist of the present invention. A form realized by combining elements and functions arbitrarily is also included in the present invention.

Claims (10)

1. A lighting device, characterized in that, comprising: Lighting modules; and a spherical shell, covering the above-mentioned light-emitting module; The above-mentioned light-emitting module has: a substrate having a first surface and a second surface opposite to the first surface; and a light-emitting element disposed on the first surface of the substrate; A protruding portion is provided on the inner surface of the spherical shell, and the protruding portion protrudes to a position facing the second surface of the substrate. 2. The lighting device according to claim 1, characterized in that, The spherical shell is configured to surround the entire circumference of the side surface of the substrate; The said board|substrate has a protrusion part facing the said protrusion part. 3. The lighting device according to claim 2, characterized in that, The protruding portion extends along the circumferential direction of the spherical shell. 4. The lighting device of claim 3, wherein A first wall is provided on the inner surface of the spherical shell; The said 1st wall part is located in the side of the said protrusion part, and is provided in the vicinity of one end part of the extension direction of the said protrusion part. 5. The lighting device of claim 4, wherein A second wall is provided on the inner surface of the spherical shell; Between the second wall portion and the protruding portion, a gap larger than the width of the protruding portion exists along the circumferential direction of the spherical shell. 6. The lighting device according to any one of claims 1 to 5, characterized in that: A plurality of the above-mentioned protrusions are provided. 7. The lighting device of claim 6, wherein The spherical shell has an arm portion extending from the opening end of the spherical shell in the thickness direction of the substrate; The protruding portion is provided on the inner surface of the arm portion. 8. The lighting device according to any one of claims 1 to 5, wherein The spherical shell is held by the substrate. 9. The lighting device according to any one of claims 1 to 5, wherein A convex portion is provided on the outer peripheral surface of the spherical shell; The said convex part is located in the range of the marking part provided in a part of the said illuminating device. 10 . The lighting device according to claim 1 , wherein: 10 . Also has: lamp holder; a circuit unit that generates power for causing the light-emitting element to emit light from the power received by the base; and The casing houses the circuit unit.