CN205299186U - Light -emitting diode (LED) bulb lamp - Google Patents

Abstract

The utility model relates to a light -emitting diode (LED) bulb lamp, it is including going out a light shield, LED module, radiator, drive arrangement and lamp holder, a serial communication port, the LED module includes a plurality of LED units to along the direction of current flow, the quantity of LED chip tapers off and arranges in every LED unit, the radiator that has the both ends opening and be the loudspeaker form with go out the light shield with the lamp holder is connected fixedly, and be equipped with in the cavity of radiator drive arrangement, drive arrangement with the LED module with lamp holder electrical connection, and drive arrangement includes rectifier module, control module, constant -current module and energy storage module, and constant -current module sets up control module with between the LED module. The utility model discloses a bright optimum proportion of LED unit segmentation point is determined in the experiment to improve the utilization ratio of LED subassembly, carry high power factor, improve the light efficiency.

Description

A kind of LEDbulb lamp

Technical field

This utility model relates to a kind of LED light device, particularly relates to a kind of LEDbulb lamp.

Background technology

LED is the light being produced superhigh intensity by superconduction luminescent crystal, and the heat that it sends is little, the performances such as owing to it is energy-conservation, running voltage is low, and the life-span is long, environmental protection, specular removal, and present LED has been known as the environment-friendly type high-tech light source of a new generation by the whole world.

Owing to the ideal operation mode of LED is to adopt constant-current driving, and present civil power is sinusoidal ac, so must power supply be changed. And the common conversion electric power life-span is significantly shorter than the life-span of LED, thus constraining the actual useful year of LED light device.

A kind of published alternating current directly drives LED technology, the methods adopting resistance-capacitance depressurization more. This method simple in construction, but delivery efficiency is low, and if components and parts select improper, not only can not blood pressure lowering, also can cause the damage of circuit. Newly improved constant current technology: first rectification, then plurality of LEDs assembly (can comprise the current limiting device connected with it, such as current regulator diode) according to coupling tube voltage drop be connected on rectification unit after, addition switch suitable in the middle of the LED component of series connection, the mode lighted by segmentation improves the utilization rate of power supply. Finding through great many of experiments, the utilization rate of power supply is affected quite big by the ratio of LED segmentation.

One of novel green light source of LEDbulb lamp conventional incandescent bulb as an alternative, has good market prospect. In the prior art, LEDbulb lamp is generally made up of diffuser (going out light shield), lamp holder, radiator, driving device and LED module. General radiator is arranged on after LED module, so that LEDbulb lamp energy saving, life-span are long; But owing to heatsink weight is big, structure complicated causing not easily installs, and diffuser is easily broken. Careless slightly in installation process will easily make radiator or diffuser drop and make LEDbulb lamp damage, and then produce safety issue. If using the such as mechanical fastener of screw one class or thread connecting mode to be attached fixing to radiator and diffuser, although can fixation, but be not suitable for the diffuser of glass material class, range of application is restricted.Buckle structure is mechanically connected fixed form as one and is subject to extensive use in light fixture, and it has wider application scope compared with thread connecting mode, and is capable of Fast Installation. Chinese patent CN202927762U discloses the buckle structure of a kind of LEDbulb lamp, though diffuser and radiator can be carried out quick assembling by this buckle structure, but required by diffuser material is had, it must be the diffuser with good flexible Low Density Polyethylene diffuser or such as etc material, not being suitable for the diffuser of glass material, its range of application is still limited.

Utility model content

Deficiency for above prior art, this utility model provides a kind of LEDbulb lamp, it includes light shield, LED module, radiator, driving device and lamp holder, it is characterized in that, described LED module includes multiple LED unit, and along the sense of current, in each LED unit, the quantity of LED chip tapers off arrangement, have both ends open and in trumpet-shaped radiator with described go out light shield and described lamp holder be connected and fix, and it is provided with described driving device in the cavity of described radiator, described driving device and described LED module and the electrical connection of described lamp holder, and described driving device includes rectification module, control module, constant flow module and energy-storage module, and described constant flow module is arranged between described control module and described LED module.

According to a preferred implementation, described LED module includes the first LED unit, second LED unit, 3rd LED unit and substrate, wherein, described first LED unit, described second LED unit and described 3rd LED unit are annularly arranged on the substrate according to mode from inside to outside, and described first LED unit, the quantity of the LED chip of described second LED unit and described 3rd LED unit is than for 5:4:3, and, described LED module startup stage, described driving device is according to described first LED unit, LED light source module described in the sequential illumination of described second LED unit and described 3rd LED unit.

According to a preferred implementation, described rectification module includes the first rectifier arm and the second rectifier arm that are made up of four diodes, the first diode and the 3rd Diode series in described four diodes constitute described first rectifier arm, and the second diode and the 4th Diode series in described four diodes constitute described second rectifier arm.

According to a preferred implementation, described constant flow module includes the first constant current unit, the second constant current unit and the 3rd constant current unit, and each constant current unit includes a transistor and a feedback resistance respectively,

In each constant current unit, the drain electrode of its transistor connects the outfan of corresponding LED unit, and the grid of its transistor connects described control module, and the source electrode of its transistor is connected to the source electrode of the transistor of next constant current unit via its feedback resistance.

According to a preferred implementation, described control module includes the first resistance, second resistance and controlled source of stable pressure, described control module is connected between the output plus terminal of described rectification module and output negative terminal, wherein, the negative terminal of described controlled source of stable pressure is connected to the output plus terminal of described rectification module via described first resistance, and the negative terminal of described controlled source of stable pressure is also respectively connected with the grid of the transistor of each constant current unit, the anode of described controlled source of stable pressure connects the output negative terminal of described rectification module, the reference edge of described controlled source of stable pressure is connected to the source electrode of described transistor via described second resistance.

According to a preferred implementation, described energy-storage module includes electric capacity, and one end of described electric capacity connects the output plus terminal of described rectification module and the input of described LED module, and the other end of described electric capacity connects the outfan of described LED module.

According to a preferred implementation, described go out light cover on its bottom opening edge and be axially formed buckle supporting leg, in order to by described go out light shield buckle be fixed to described radiator, described go out light cover on its bottom opening place along described in go out light shield inwall radially protruding and have spacer, in the mounted state, described spacer presses the outer peripheral edge region to described substrate in form-fit fashion, thus described LED module is fixed to described radiator.

According to a preferred implementation, described radiator with described go out the port that is connected of light shield be axially formed the ring-shaped platform for supporting fixing described LED module, it is formed with cannelure between described ring-shaped platform and heat radiation wall, light shield is gone out described in holding, the outer peripheral edge region of described ring-shaped platform is provided with the breach for holding described buckle supporting leg, described heat radiation wall offers the draw-in groove corresponding with described breach, described breach and described draw-in groove together form snap connection with described buckle supporting leg, thus described in go out light shield and described radiator and snap connection.

According to a preferred implementation, described draw-in groove is L-shaped.

According to a preferred implementation, the outer wall distribution of described radiator has radiating fin.

LEDbulb lamp of the present utility model has been improved in the connected mode and driving device of product members. The wider array of buckle connecting structure of range of application is obtained by the buckle snapping connection light shield and radiator in prior art is done further Optimal improvements, simultaneously by rational structural design, make to show that light shield is fixed by snap and in the lump LED module is fixed to radiator while radiator, without increasing extra connector, it is achieved thereby that the quick assembling of product and also save product cost. On the constant current technology of existing improvement, this utility model adopts segmentation lighting mode, and the ratio of LED segmentation is carried out preferably, thus the utilization rate of LED module is greatly improved, reduce the harmonic wave of input current, improve the light efficiency of power factor and LED fluorescent lamp tube.

Accompanying drawing explanation

Fig. 1 is the structure chart of LEDbulb lamp of the present utility model;

Fig. 2 (a) is the structure chart light shield of LEDbulb lamp of the present utility model;

Fig. 2 (b) is the Local map light shield of LEDbulb lamp of the present utility model;

Fig. 2 (c) is the Local map light shield of LEDbulb lamp of the present utility model;

Fig. 3 (a) is the Local map of the radiator of LEDbulb lamp of the present utility model;

Fig. 3 (b) is the top view of the radiator of LEDbulb lamp of the present utility model;

Fig. 4 is the schematic diagram that alternating current directly drives LED circuit;

Fig. 5 is the drive circuit figure of LEDbulb lamp of the present utility model;

Fig. 6 is the unidirectional sinuous pulsation DC voltage waveform schematic diagram of the rectification unit output of LEDbulb lamp of the present utility model;

Fig. 7 is the voltage oscillogram after the unidirectional sinuous pulsation DC voltage rectification of the rectification unit output of LEDbulb lamp of the present utility model;

Fig. 8 is the input current waveform schematic diagram of LEDbulb lamp of the present utility model; With

Fig. 9 is the inside LED module layout viewing of LEDbulb lamp of the present utility model.

Reference numerals list

100:LED bulb lamp 1: go out light shield 2:LED module

3: radiator 4: driving device 5: lamp holder

11: buckle supporting leg 12: spacer 31: ring-shaped platform

32: cannelure 33: breach 10: rectification module

101: the first diode 102: the second diode 103: the three diodes

104: the four diodes 20: control module 201: the first resistance

202: the second resistance 203: controlled source of stable pressure 30: constant flow module

301 first constant current unit 302: the second constant current unit 303 first constant current unit

311,312,313: transistor 321,322,323: feedback resistance

21: the first LED unit 22: the second LED unit 23: the three LED unit

40: energy-storage module 401: electric capacity 6: cavity

34: draw-in groove

Detailed description of the invention

This utility model is illustrated below in conjunction with accompanying drawing.

Fig. 1 illustrates a kind of LEDbulb lamp 100, and it includes light shield 1, LED module 2, radiator 3, driving device 4 and lamp holder 5. LED module 2 includes multiple LED unit (not shown), and along the sense of current, and in each LED unit, the quantity of LED chip tapers off arrangement. Have both ends open and in trumpet-shaped radiator 3 with go out light shield 1 and lamp holder 5 is connected and fixes. The small end mouth distribution of radiator 3 has screw thread so that radiator 3 is threaded connection mode with lamp holder 5 and is connected fixing. It is provided with driving device 4 in the cavity 6 of radiator 3, and cavity 6 has the space that at least can hold driving device 4. Driving device 4 is electrically connected with LED module 2 and lamp holder 5.

Fig. 2 (a) to Fig. 2 (c) illustrate of the present utility model go out light shield. As shown in Fig. 2 (a) and Fig. 2 (b), go out light shield 1 and be axially formed buckle supporting leg 11 at its bottom opening edge, be fixed to radiator 3 in order to light shield 1 buckle will be gone out. Buckle supporting leg 11 has and the crook of draw-in groove 33 buckle structure, and this crook snaps connection with draw-in groove in form-fit manner, thus light shield 1 will be gone out be fixed to radiator 3.

Referring to Fig. 2 (c), going out light shield 1 has spacer 12 at its bottom opening place along going out light shield 1 inwall radially protruding. In the mounted state, spacer 12 presses the outer peripheral edge region to substrate 7 in form-fit fashion, thus LED module 2 being fixed to radiator 3 while connecting light shield 1 and radiator 3, without LED module being fixed by other connectors or attachment structure again, thus saving product cost, also simplify product structure, installing/dismounting is also more quick, convenient simultaneously. Spacer 12 can be the single flanged structure being mutually independent as shown in Fig. 2 (c), it is also possible to be the annular slice structure being molded over out on light shield inwall. Going out light shield 1 can plastic material can also be glass material or ceramic material.

As shown in Fig. 3 (a), it is axially formed the ring-shaped platform 31 for supporting fixing LED module 2 at radiator 3 with going out the port that light shield 1 is connected. It is formed with cannelure 32 between ring-shaped platform 31 and heat radiation wall, is used for holding light shield 1. The outer peripheral edge region of ring-shaped platform 31 is provided with the breach 33 for holding buckle supporting leg 11. Heat radiation wall offers the draw-in groove 34 corresponding with breach 33. Breach 33 and draw-in groove 34 together form snap connection with buckle supporting leg 11, snap connection thus going out light shield 1 with radiator 3. Draw-in groove 34 is L-shaped. When mounted, buckle supporting leg 11 pushes along the vertical groove of L-type draw-in groove until card trench bottom, then passes through and rotates light shield 1 and make the transverse concave groove that buckle supporting leg 11 enters L-type draw-in groove complete assembling. When dismounting, then first pass through rotation and make buckle supporting leg 11 be directed at the vertical groove of L-type draw-in groove, then skid off along vertical groove again. Buckle structure moulding of the present utility model is special, it is possible to quickly realize the assembly or disassembly of component, simple in construction, good fixing effect. The outer wall distribution of radiator 3 has radiating fin, increases the area of dissipation of radiator, thus improving radiating efficiency.

Referring to Fig. 5, driving device 4 of the present utility model includes rectification module 10, controls module 20, constant flow module 30 and energy-storage module 40. Constant flow module 30 is arranged between control module 20 and LED module 2. LED module 2 includes the first LED unit the 21, second LED unit the 22, the 3rd LED unit 23 and substrate 7. First LED unit the 21, second LED unit 22 and the 3rd LED unit 23 are annularly arranged on substrate 7 according to mode from inside to outside.The quantity of the LED chip of first LED unit the 21, second LED unit 22 and the 3rd LED unit 23 is than for 5:4:3, and, LED module 2 startup stage, driving device 4 is according to the sequential illumination LED light source module 2 of first LED unit the 21, second LED unit 22 and the 3rd LED unit 23.

Rectification module 10 includes the first rectifier arm and the second rectifier arm that are made up of four diodes. The first diode 101 in four diodes and the 3rd diode 103 first rectifier arm in series. The second diode 102 in four diodes and the 4th diode 104 second rectifier arm in series. Diode 101,102,103,104 can be common commutation diode, it is also possible to be pressure enough Schottky diodes or other components and parts that can realize identical function.

Constant flow module 30 includes the first constant current unit the 301, second constant current unit 302 and the 3rd constant current unit 303. Each constant current unit includes 311,312,313 and feedback resistance 321,322,323 of a transistor respectively. In each constant current unit, the drain electrode of its transistor connects the outfan of corresponding LED unit, and the grid link control module 20 of its transistor, the source electrode of its transistor is connected to the source electrode of the transistor of next constant current unit via its feedback resistance.

Control module 20 and include the first resistance the 201, second resistance 202 and controlled source of stable pressure 203. Control module 20 to be connected between the output plus terminal of rectification module 10 and output negative terminal. The negative terminal of controlled source of stable pressure 203 is connected to the output plus terminal of rectification module 10 via the first resistance 201. The negative terminal of controlled source of stable pressure 203 is also respectively connected with the grid of the transistor of each constant current unit. The anode of controlled source of stable pressure 203 connects the output negative terminal of rectification module 10. The reference edge of controlled source of stable pressure 203 is connected to the source electrode of transistor 311,312,313 via the second resistance 202.

Energy-storage module 40 includes electric capacity 401, and one end of electric capacity 401 connects the output plus terminal of rectification module 10 and the input of LED module 2. The other end of electric capacity connects the outfan of LED module 2. Stroboscopic can be effectively reduced at LED two ends shunt-wound capacitance 401.

Electric main (AC) output ripple unidirectional current after the bridge rectifier that commutation diode 101,102,103,104 forms. After constant flow module, it is thus achieved that the stable electric current flowing through LED unit. The forward conduction voltage assuming LED unit 21,22,23 is VF1, VF2, VF3.

Its working method is:

When initial, when pulsating dc voltage is risen to VF1 by 0V, after constant flow module 30, obtain stable electric current I1. LED unit 21 conducting starts luminescence. When voltage rises to VF1+VF2 from VF1, the transistor 21 of constant current unit is closed, and the transistor 22 of constant current unit is opened, and LED unit 21,22 conducting starts luminescence, and now electric current is I2. When voltage rises to VF1+VF2+VF3 from VF1+VF2, the transistor 22 of constant current unit is closed, and the transistor 23 of constant current unit is opened, and LED unit 21,22,23 all turns on luminescence.

As it is shown in figure 5, rectification module 10 is made up of 4 commutation diodes, the electric main of input being rectified into unidirectional Rectified alternating current, its voltage waveform is as shown in Figure 7. The reference voltage circuit controlling module 20 is made up of the first resistance 201 and the controlled source of stable pressure TL431 connected with it. One end of first resistance 201 and the output plus terminal of rectification module 10 connect, and the negative terminal (negative electrode) of its other end and TL431 connects.Control module 20 to be connected with the grid of transistor as the drive end of constant current unit transistor. The anode (anode) of TL431 is connected to the output negative terminal of rectification module 10. The reference edge of TL431 is connected with constant current unit. Constant current unit basic structure is identical, it is made up of a transistor and current setting resistor, for constant current unit 301, the grid of transistor 311 is connected to the negative electrode of TL431, and source electrode is connected to constant-current control unit end and is connected with one end of current setting resistor 321. The other end of current setting resistor 321 is drawn out to the source electrode of the transistor of next stage constant current unit. The drain electrode of transistor 311 is connected to the junction point between the first LED unit and the second LED unit. The electric current Vref/ �� of each direct current_N=iRi, the other end of the current setting resistor of afterbody constant current unit is directly connected to rectification unit output negative terminal.

Concrete: along with AC power supplies voltage continues to rise, under constant current state, the voltage that first LED unit 21 is born remains unchanged, its unnecessary voltage drop is born by transistor (can be metal-oxide-semiconductor field effect transistor), also being born by the second LED unit 22 and the second constant current unit, the constant current of constant current state is Vref/ (R₃₁₂+R₃₁₃). When, after the on state threshold voltage that voltage has reached the first LED unit 21 and the second LED unit 22, the second constant current unit is convinced by patient analysis logical, and constant current after current is Vref/ (R₃₁₂), transistor 311 ends.

When input voltage begins to decline from 310V, the equal all light of LED unit, the electric current of lighting module is Vref/R₃₁₃, other constant current unit is turned off. Along with voltage is gradually lowered, when voltage is lower than the conducting voltage of three LED unit, electric current begins to decline, when electric current is low to moderate Vref/ (R₃₁₂+R₃₁₃) time, the first LED unit 21 of lighting module is extinguished, and voltage is gradually reduced, until final stage extinguishes.

Voltage waveform in experiment as shown in Figure 6, obtains voltage waveform as shown in Figure 7 after over commutation. After the current constant control of overdrive circuit, obtain current waveform as shown in Figure 8. Taking 1/4 cycle is example, and t1, t2, t3 is first paragraph respectively, second segment, time when the 3rd section of LED chip is lighted. In figure, shaded area is unemployed power in circuit. So, the area of dash area should be the smaller the better.

Embodiment

This utility model adopts three kinds of schemes, by a number of first paragraph LED, a number of second segment LED, a number of the 3rd section of LED, this number ratio of three sections, according to being incremented by, successively decreases, and the scheme divided equally arranges respectively, tests.

In experiment, 80 LEDs chips being divided into three sections, respectively according to being incremented by, successively decrease, the ratio divided equally arranges. Find through substantial amounts of experiment, adopt the scheme successively decreased, the stability of circuit with electronic devices and components is had certain guarantee with safety, it is possible to circuit is caused damage by effective prefabricated hot plug, and has higher power factor, and Harmonics of Input is also less. Taking most ratio of greater inequality 5:4:3, an actual number ratio is 33:27:20. Calculating t1, t2, t3, the threshold value taking each LEDs chip is 2.5V. The cut-in voltage of three sections surveyed is vf respectively₁=82.5V, vf₂=150V, vf₃=200V.

82.5=311*sin (t1)

150=311*sin (t2)

200=311*sin (t3)

Solve: t1=15.4

T2=28.5

T3=40

Obtain the ON time of three sections than for 1.14:1:4.4.

Fig. 9 is the internal LED scattergram of bulb lamp, and circle ring area 21 is the COB that ratio the is 3 LED module encapsulated, and circle ring area 22 is the LED module of the COB encapsulation that ratio is 4, and circle ring area 23 is the LED module of the COB encapsulation that ratio is 5.When adding after power supply, ratio be 5 LED module first light, the order lighted is followed successively by 5,4,3, the order of extinguishing is followed successively by 3,4,5, so can be effectively prevented from the hot spot within light source board. Increase and decrease the powder amount of the fluorescent material smeared successively according to the scale of LED number, namely ratio be 5 COB module in the fluorescent material smeared maximum, so just can effectively achieve desired color temperature.

It should be noted that; above-mentioned specific embodiment is illustrative of; those skilled in the art can find out various solution under the inspiration of this utility model disclosure, and these solutions also belong to open scope of the present utility model and fall within protection domain of the present utility model. It will be understood by those skilled in the art that this utility model description and accompanying drawing thereof are illustrative and not constitute limitations on claims. Protection domain of the present utility model is limited by claim and equivalent thereof.

Claims (10)

1. a LEDbulb lamp (100), it includes light shield (1), LED module (2), radiator (3), driving device (4) and lamp holder (5), it is characterised in that

Described LED module (2) includes multiple LED unit, and along the sense of current, and in each LED unit, the quantity of LED chip tapers off arrangement,

Have both ends open and in trumpet-shaped radiator (3) with described go out light shield (1) and described lamp holder (5) be connected and fix, and it is provided with described driving device (4) in the cavity (6) of described radiator (3)

Described driving device (4) and described LED module (2) and described lamp holder (5) electrical connection, and described driving device (4) includes rectification module (10), controls module (20), constant flow module (30) and energy-storage module (40), and described constant flow module (30) is arranged between described control module (20) and described LED module (2).

2. LEDbulb lamp (100) as claimed in claim 1, it is characterized in that, described LED module (2) includes the first LED unit (21), the second LED unit (22), the 3rd LED unit (23) and substrate (7), wherein

Described first LED unit (21), described second LED unit (22) and described 3rd LED unit (23) are annularly arranged on described substrate (7) according to mode from inside to outside, and

The quantity of the LED chip of described first LED unit (21), described second LED unit (22) and described 3rd LED unit (23) is than for 5:4:3, and, described LED module (2) startup stage, described driving device (4) is LED light source module (2) described in the sequential illumination of described first LED unit (21), described second LED unit (22) and described 3rd LED unit (23).

3. LEDbulb lamp (100) as claimed in claim 2, it is characterized in that, described rectification module (10) includes the first rectifier arm and the second rectifier arm that are made up of four diodes, the first diode (101) in described four diodes and the 3rd diode (103) described first rectifier arm in series, the second diode (102) in described four diodes and the 4th diode (104) described second rectifier arm in series.

4. LEDbulb lamp (100) as claimed in claim 3, it is characterized in that, described constant flow module (30) includes the first constant current unit (301), the second constant current unit (302) and the 3rd constant current unit (303), each constant current unit includes a transistor (311,312,313) and a feedback resistance (321,322,323) respectively

In each constant current unit, the drain electrode of its transistor connects the outfan of corresponding LED unit, the grid of its transistor connects described control module (20), and the source electrode of its transistor is connected to the source electrode of the transistor of next constant current unit via its feedback resistance.

5. LEDbulb lamp (100) as claimed in claim 4, it is characterized in that, described control module (20) includes the first resistance (201), the second resistance (202) and controlled source of stable pressure (203), described control module (20) is connected between the output plus terminal of described rectification module (10) and output negative terminal, wherein

The negative terminal of described controlled source of stable pressure (203) is connected to the output plus terminal of described rectification module (10) via described first resistance (201), and the negative terminal of described controlled source of stable pressure (203) is also respectively connected with the grid of the transistor of each constant current unit

The anode of described controlled source of stable pressure (203) connects the output negative terminal of described rectification module (10),

The reference edge of described controlled source of stable pressure (203) is connected to the source electrode of described transistor (311,312,313) via described second resistance (202).

6. LEDbulb lamp (100) as claimed in claim 5, it is characterized in that, described energy-storage module (40) includes electric capacity (401), one end of described electric capacity (401) connects the output plus terminal of described rectification module (10) and the input of described LED module (2), and the other end of described electric capacity connects the outfan of described LED module (2).

7. LEDbulb lamp (100) as described in one of claim 2 to 6, it is characterised in that

Described go out light shield (1) be axially formed buckle supporting leg (11) at its bottom opening edge, in order to by described go out light shield (1) buckle be fixed to described radiator (3),

Described go out light shield (1) its bottom opening place along described in go out light shield (1) inwall radially protruding and have spacer (12), in the mounted state, described spacer (12) presses the outer peripheral edge region to described substrate (7) in form-fit fashion, thus described LED module (2) is fixed to described radiator (3).

8. LEDbulb lamp (100) as claimed in claim 7, it is characterised in that

Described radiator (3) with described go out the port that is connected of light shield (1) be axially formed the ring-shaped platform (31) for supporting fixing described LED module (2),

It is formed with cannelure (32) between described ring-shaped platform (31) and heat radiation wall, described in being used for holding, goes out light shield (1),

The outer peripheral edge region of described ring-shaped platform (31) is provided with the breach (33) for holding described buckle supporting leg (11), described heat radiation wall offers the draw-in groove (34) corresponding with described breach (33)

Described breach (33) and described draw-in groove (34) and described buckle supporting leg (11) together form snap connection, thus described in go out light shield (1) and snap connection with described radiator (3).

9. LEDbulb lamp as claimed in claim 8, it is characterised in that described draw-in groove (34) is L-shaped.

10. LEDbulb lamp as claimed in claim 9, it is characterised in that the outer wall distribution of described radiator (3) has radiating fin.