KR101620476B1

KR101620476B1 - LED Bulb Combined Base

Info

Publication number: KR101620476B1
Application number: KR1020150088446A
Authority: KR
Inventors: 김성진
Original assignee: 주식회사 코메코 아이엔티
Priority date: 2015-06-22
Filing date: 2015-06-22
Publication date: 2016-05-13

Abstract

The present invention relates to a base-integrated LED bulb integrally formed with a lower body of an LED bulb integrally with an LED bulb coupled with a socket connected to a power source, wherein a hemispherical upper body A combined LED bulb comprising: a base portion formed integrally with a hemispherical lower body at a lower end of the LED substrate and having threads formed on an outer periphery thereof and having through holes formed in a side surface and a bottom surface, respectively; A first terminal electrically connected to the LED substrate and fixedly coupled to a first through hole formed on a bottom surface thereof and a second terminal electrically connected to the LED substrate and fixedly coupled to a second through- And a conductive metal cover having a cylindrical shape in which threads are formed on an inner side surface and an outer side surface, an inner side surface is screwed to the outer peripheral surface of the base portion, and an outer side surface is screwed to the first terminal portion of the socket, And the contact protrusion is protruded through the second through hole. The present invention relates to an LED bulb lower body and a base part integrally made of a synthetic resin so that the lower body and the base are not separated uninterruptedly and the connection of the internal wiring of the LED bulb is simplified and the short circuit is prevented, Improving workability and performance, and reducing manufacturing time and manufacturing cost of LED bulbs.

Description

Base Integrated LED Bulb {LED Bulb Combined Base}

The present invention relates to an LED bulb, and more particularly, to a base-integrated LED bulb integrally formed with an LED bulb lower body and an injection molded body, wherein a base portion of an LED bulb coupled with a socket connected to a power source is integrally formed.

Generally, an electric bulb is called an incandescent lamp in which a resistance wire called a filament is inserted into a glass bulb in which a vacuum or a small amount of nitrogen or argon gas is enclosed and a current is flowed and heated to cause temperature radiation at a temperature higher than 2,000 ° C. In addition to general-purpose lighting, the bulb has special light bulbs according to the type and purpose. The bulb has a short lifetime due to its brightness and a large power consumption. Fluorescent lamps have emerged to overcome these drawbacks. Fluorescent lamps are made by putting mercury and argon gas into a vacuum glass tube and applying fluorescent paint on the inner wall to turn the ultraviolet rays generated by the discharge of mercury into visible light. However, the fluorescent lamp has a problem that the paint or the gas enclosed therein causes environmental pollution.

Recently, according to the technological development, LEDs having more improved power consumption and lifetime than bulbs and fluorescent lamps have emerged. Therefore, light sources for domestic and industrial luminaires are being replaced by conventional lamps such as filament lamps and fluorescent lamps using LEDs. And LED lamps are available with LED bulbs with shapes and shapes similar to traditional bulbs. Most of the LED bulbs are made of conventional light bulb base, polycarbonate (PC), polyethylene (PE), and three-wavelength synthetic resin. However, due to the heavy weight heat sink used in the LED bulb, it is not well compatible with the conventional parts, and the LED bulb is vulnerable to impact or breakage due to the weight of the LED bulb.

1, an LED bulb 1 is manufactured by an upper body 4 for diffusing light emitted from an LED 3 attached to a plurality of LED substrates 2, and an injection molded product made of synthetic resin including a heat- And a base 6 of a conductive metal material which is coupled to the socket 7 and is coupled to the lower body 5. [ The base 6 is secured to the lower body 5 by a caulking operation C of approximately 8 to 12 parts. However, there is a problem that the base 6 is easily separated or lost from the lower body 5 due to external impact or the weight of the lower body 5.

Korean Registered Patent No. 10-1176909 (Aug. 30, 2012)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide an LED bulb integrally formed with a lower body and a base portion, and eliminating a base screwed into the socket.

Another object of the present invention is to integrate the lower body of the LED bulb with the base to minimize the loss of the LED bulb due to the external impact or the weight of the LED bulb, and to reduce the manufacturing time and manufacturing cost of the LED bulb.

In order to attain the above object, the present invention provides an LED bulb having a hemispherical upper body coupled to an upper end of an LED substrate having a plurality of LEDs, the LED bulb being integrally formed with a hemispherical lower body at a lower end of the LED substrate, A base portion having a through hole formed in a side surface and a bottom surface, respectively; A first terminal electrically connected to the LED substrate and fixedly coupled to a first through hole formed on a bottom surface thereof and a second terminal electrically connected to the LED substrate and fixedly coupled to a second through- And a conductive metal cover having a cylindrical shape in which threads are formed on an inner side surface and an outer side surface, an inner side surface is screwed to the outer peripheral surface of the base portion, and an outer side surface is screwed to the first terminal portion of the socket, And the contact protrusion is protruded through the second through hole.

Further, in the present invention, a holder for supporting the second terminal may be formed inside the base portion in which the second through hole is formed.

Further, in the present invention, it is preferable that the second terminal has elasticity.

According to the present invention, the LED bulb lower body and the base portion are integrally made of synthetic resin, so that the lower body and the base are not separated uninterruptedly, the connection of the internal wiring of the LED bulb is simplified, the short circuit is prevented, And the manufacturing time and manufacturing cost of the LED bulb are reduced.

1 is a perspective view showing a structure of a conventional LED bulb.
2 is a perspective view showing a base-integrated LED bulb according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view showing the base-integrated LED bulb according to the present invention.
4 is a perspective view showing a base-integrated LED bulb according to another embodiment of the present invention.
5 is a cross-sectional view of Fig.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a base-integrated LED bulb according to the present invention will be described in detail with reference to the accompanying drawings.

2 and 3, a spherical LED bulb 10 includes a hemispherical upper body 13 that emits light, a lower body 14 that emits heat generated from the LED, ), And a substrate 11 to which a plurality of LEDs are attached by soldering is coupled between the upper body 13 and the lower body 14. Further, the base member 15 is integrally coupled to the lower body 14 for coupling with the socket 30 to which power is connected.

The base portion 15 is formed integrally with the hemispherical lower body 14 integrally with the lower end of the LED substrate 11. The base portion 15 of the lower body 14 is engaged with the first terminal portion 31 coupled to the inner side surface of the socket 30. [ In other words, the base portion 15 is screwed to the first terminal portion 31 having a screw thread formed on the outer circumferential surface and formed on the inner circumferential surface. A first through hole 16 is formed in the bottom surface of the base portion 15 and a second through hole 18 is formed in the side surface. The holder 19 is provided with a substantially V-shaped holder 19 upwardly at an angle from the inside of the base portion 15 formed with the second through hole 18 at an angle and the second terminal 21 ).

The first terminal 20 is electrically connected to the LED substrate 11 and penetrates the first through hole 16 formed in the lower portion of the base portion 15. The end of the first terminal 20 is electrically connected to the bottom portion 15 of the base portion 15, And is fixedly coupled to the contact portion 17 protruding from the base. The first terminal 20 electrically connected to the LED substrate 11 is brought into contact with the second terminal portion 32 provided on the inner surface of the socket 30 to connect the AC power applied to the socket 30 to the LED substrate 11). Furthermore, when the first terminal 20 penetrates through the first through hole 16 and is brought into contact with the second terminal portion 32 of the socket 30, the first through hole 16 is sealed. At this time, it is preferable that the second terminal portion 32 of the socket 30 has elasticity.

The second terminal 21 is electrically connected to the LED substrate 11 and the contact protrusion 22 protrudes through the second through hole 18 formed on the side of the base portion 15. Further, the second terminal 21 is inserted into a substantially V-shaped holder 19 provided inside the base portion 15. The second terminal 21 electrically connected to the LED substrate 11 is configured such that the contact protrusion 22 contacts the first terminal portion 31 of the socket 30 to connect the AC power AC applied to the socket 30 to the LED 30, To the substrate (11). At this time, it is preferable that the second terminal 21 has elasticity. That is, when the second terminal 21 is inserted into the holder 19 and then the contact projection 22 is inserted through the second through hole 18 to protrude therefrom, (30), the first terminal portion (31) is brought into elastic contact with the first terminal portion (31).

The operation of combining the base-integrated LED bulb and the socket thus constructed will be described.

First, a substrate 11 having a plurality of LEDs attached by soldering or the like is prepared for manufacturing the LED bulb 10, and the spherical LED bulb 10 is provided with a hemispherical upper body 13 for emitting light Injection molding. The upper body 13 is made of synthetic resin, but may be made of glass if necessary.

The base portion 15 is integrally injection-molded so as to engage with the lower body 14 that emits heat generated from the LED and the socket 30 connected to the power source. At this time, the material of the lower body 14 is made of polybutylene terephthalate (PBT) having insulation and flame retardancy properties in order to minimize carbonization of the synthetic resin used as an injection product due to heat dissipation of the LED, Polybutylene terephthalate) resin is applied. The PBT resin prevents ignition due to a short inside the bulb and prevents the lower body 14 from being damaged by carbonization due to the high heat generated in the aluminum heat sink coupled with the lower body 14 . The PBT resin is a polyester thermoplastic resin having the strongest heat resistance among the thermoplastic resins. It is not deformed even at a temperature of 150 degrees. Further, when glass fiber is added to PBT resin and reinforced, it can be applied to various engineering resins.

It is not necessary to form a separate metal base by integrally molding the base portion 15 screwed with the socket 30 into the lower body 14 of the LED bulb 10 by injection molding. A first through hole 16 is formed in the bottom surface of the base portion 15, through which the first terminal 20 penetrates and is fixedly coupled. A conductive metal in contact with the second terminal portion 32 of the socket 30 is fixed to an end of the first terminal 20 in a protruding manner. A second through hole 18 is formed on the side surface of the base portion 15, to which the second terminal 21 is coupled. The second terminal 21 is inserted and fixed in a holder 19 provided on the inner side surface of the base portion 15. Further, the contact protrusion 22 protruding from the second terminal 21 is inserted into the second through hole 18. The contact protrusion 22 protruding through the second through hole 18 is in contact with the cylindrical first terminal portion 31 of the socket 30 while being screwed. At this time, the contact protrusion 22 is kept in contact with the socket 30 by elasticity due to the elasticity of the second terminal 21.

Therefore, the lower body 14 of the LED bulb 10 is injection-molded integrally with the base portion 15, and a screw thread is formed on the outer peripheral surface of the base portion 15 so as to be screwed into the socket 30 to which power is connected The second terminal portion 32 of the socket 30 is brought into contact with the first terminal 20 of the base portion 15 and the cylindrical first terminal portion 31 of the socket 30 is brought into contact with the first terminal 20 of the socket portion 30, Is in contact with the second terminal (21) protruding from the second through hole (18) on the side of the base part (15). The AC power source AC applied to the second terminal portion 32 of the socket 30 and the first terminal portion 31 is connected to the first terminal 20 And the LED substrate 11 through the second terminal 21 and the LED substrate 11 converts the applied AC power into DC power so that each LED emits light.

Accordingly, it is possible to minimize the loss of light due to an external impact on the LED bulb by omitting a separate base for coupling with the socket, and it is possible to remarkably reduce the defect rate in the process of manufacturing the LED bulb.

4 and 5, a conductive metal cover 40 screwed into the socket 30 is coupled to the base portion 15 in accordance with another embodiment of the present invention. The conductive metal cover 40 has a cylindrical shape and is formed with threads on the inner and outer sides so that the inner side is screwed to the outer peripheral surface of the base portion 15 and the outer side is connected to the first terminal portion 31 of the socket 30 To which a conductive metal cover 40 is screwed. The conductive metal cover 40 has a substantially cylindrical upper opening and a lower end through which the first terminal 20 protrudes through the first through hole 16 of the base portion 15.

That is, the lower body 14 of the LED bulb 10 is formed by injection molding the base portion 15 integrally with the first through hole 16 and the second through hole 18 on the bottom face and the side face of the base portion 15, A conductive metal cover 40 with threads formed on the inner side surface and the outer side surface, respectively. The first terminal 20 is fixedly coupled to the first through hole 16 and the second terminal 21 is fixedly coupled to the second through hole 18. [ Then, the conductive metal cover 40 is screwed to the base portion 15 and the second terminal 21 is contacted.

When the socket 30 is screwed into the base portion 15 to which the conductive metal cover 40 is coupled to the lower body 14 of the LED bulb 10, the second terminal portion 32 of the socket 30, The first terminal 20 of the socket 15 is contacted and the cylindrical first terminal portion 31 of the socket 30 contacts the second terminal 21 protruding from the second through hole 18 of the base portion 15 The outer surface of the contacted conductive metal cover 40 is contacted. The AC power source AC applied to the second terminal portion 32 of the socket 30 and the first terminal portion 31 is connected to the first terminal 20 And the second terminal 21 in contact with the outer surface of the conductive metal cover 40. The LED substrate 11 converts the applied AC power to DC power, .

While the invention has been shown and described with respect to the specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone who has it will know it easily.

LEDs 4 and 13 are mounted on an upper body 5 and 14 and a lower body 6 is mounted on a base 7 and 30 and a socket 15 is mounted on the base 16. : Second through hole 19: holder 20: first terminal 21: second terminal 22: contact protrusion 30: socket 31: first terminal portion 32: second terminal portion 40: conductive metal cover

Claims

In an LED bulb in which a hemispherical upper body is coupled to an upper end of an LED substrate to which a plurality of LEDs are attached,
A base portion formed integrally with the hemispherical lower body at the lower end of the LED substrate and having threads formed on the outer periphery thereof and having through holes on the side and bottom surfaces, respectively;
A first terminal electrically connected to the LED substrate and fixedly coupled to a first through hole formed on a bottom surface thereof,
And a second terminal electrically connected to the LED substrate and fixedly coupled to a second through hole formed on a side surface,
And a conductive metal cover in which a screw thread is formed on an inner side surface and an outer side surface in a cylindrical shape so that an inner side surface is screwed to the outer peripheral surface of the base portion and an outer side surface is screwed to the first terminal portion of the socket,
And a contact protrusion formed on the second terminal protrudes through the second through hole.

The LED light bulb according to claim 1, wherein a holder for supporting the second terminal is formed inside the base portion on which the second through hole is formed.

The LED light bulb according to claim 1 or 2, wherein the second terminal is elastic.

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