TWI532952B - LED bulb - Google Patents

Description

LED bulb

The invention relates to the technical field of the structure of an LED bulb, in particular to an LED bulb with good heat dissipation effect, convenient and rapid assembly, long service life and mild light on the circumference.

A commonly known LED light bulb, as disclosed in Taiwan Patent No. M402387, mainly comprises a plurality of LED chips on a circuit board of aluminum material, and then bonding the circuit board to a heat conducting plate of aluminum material, and then The heat conducting plate is assembled at one end of one of the heat dissipating blocks of the aluminum material, and a lamp cover is coupled to the side of the heat dissipating plate opposite to the heat dissipating block for covering the circuit board and the plurality of LED chips on the other end of the heat dissipating block An adapter is coupled to enable mounting on a bulb socket, and a transformer is disposed in the heat sink for electrically connecting to the adapter and the circuit board. In this way, the high temperature generated by the LED chip can be transmitted to the aluminum heat conduction plate through the aluminum circuit board, and then transferred to the aluminum heat sink by the aluminum heat conduction plate, and then the plurality of heat sinks on the periphery of the heat sink The heat dissipating blades and the heat dissipating grooves therebetween disperse heat into the surrounding air to achieve a cooling effect, and simultaneously use the plurality of heat dissipating holes on the heat conducting plate to directly dissipate the temperature of the circuit board into the through holes in the heat dissipating seat, so that The hot gas can be guided by the venting channel of the heat sink and discharged outward from the venting slot to further improve the heat dissipation and cooling effect.

However, the conventional LED bulbs have the following disadvantages in actual production and use:

1. The heat generated by the LED chip of the conventional LED bulb needs to pass through the circuit board, the heat conducting board and the heat sink to be radiated to the outside air, and the circuit board, the heat conducting board and the heat sink The thermal resistance is formed to greatly reduce the heat transfer efficiency of the LED chip, thereby affecting the heat dissipation effect thereof. Moreover, the heat sink only uses a plurality of venting slots close to one end surface of the adapter to discharge the internal hot air, which not only has a poor heat removal effect due to being far away from the heat source, especially the venting slots. Since it is impossible to form convection with the outside cold air, the internal hot gas is not easily discharged and there is a situation in which it accumulates. Therefore, the overall heat dissipation effect is very poor.

2, the conventional LED bulb is required to first combine a plurality of LED chips on the circuit board, and then the board is screwed on the heat conducting board, and the heat conducting board is screwed on the heat sink, so The assembly is very cumbersome and inconvenient. In particular, if the bonding state between the circuit board and the heat conducting plate and the heat conducting plate and the heat sink has a very large gap, the heat conduction effect is greatly reduced, thereby further increasing the difficulty of assembly. Degree and time spent.

3. The circuit board of the conventional LED bulb covers a plurality of heat dissipation holes on the heat conduction plate, so the circuit board and the plurality of LED chips thereon are covered by the lamp cover and the heat conduction plate in a sealed space. Therefore, the heat generated when the plurality of LED chips emit light causes the sealed space inside the lampshade to be filled with hot air, and the hot gas system cannot be exported to the outside, so that the LED wafer is caused once a long time. Very large impact, which in turn greatly shortens its service life.

4, because the conventional LED bulb is wrapped in the lampshade and the heat conducting plate, wherein the lampshade is transparent, the heat conducting plate is made of aluminum and is not transparent, so the plurality of LED wafers The emitted light can only be projected to the direction of the heat-conducting plate toward the lamp cover, and the portion of the heat-conducting plate to the periphery of the adapter block is blocked by the light-conducting plate without being irradiated, so that it is dark.

Conventional LED bulbs have problems such as poor heat dissipation, inconvenient assembly, short service life, and incapability of the illumination to illuminate the surroundings and darken the surroundings.

The invention provides an LED light bulb, comprising a base, a light cup, a plurality of LED chips, a fixed cover, a decorative ring, a lamp cover, a lamp holder and a power conversion module. The base is made of a plastic material, and has a shell wall with a small end and a small end end and a ring wall located inside the shell wall. The inner side of the ring wall encloses an accommodation space which is open toward the head end. A convection space is formed between the ring wall and the shell wall in an open shape toward the head end, and the outer peripheral surface of the shell wall has a plurality of convection holes penetrating into the convection space. The lamp cup is made of a composite material with high thermal conductivity and good insulation, and is coupled to the opening end of the shell wall for covering the opening of the convection space. The lamp cup comprises a substrate and is arranged on one side of the substrate. a plurality of heat dissipating fins integrally formed on the other side of the substrate, wherein the plurality of heat dissipating fins are respectively formed with a plurality of heat dissipating grooves connecting the convection space and the outer portion, and the center of the substrate has a through hole to the bottom a perforation having an annular arrangement near the periphery and respectively penetrating the plurality of heat dissipation A plurality of through holes in the slot. The plurality of LED chips are bonded to the circuit. The fixing cover covers the opening of the receiving space, and has a protruding post protruding into the through hole. The end surface of the protruding post has a guiding hole extending through the bottom surface to communicate with the receiving space. The trim ring is detachably coupled to the base of the lamp cup. The lampshade is detachably coupled to the trim ring for illuminating the plurality of LED chips on the inner side and for transmitting light of the plurality of LED chips. The base is coupled to the rear end of the casing wall for screwing onto a bulb socket. The power conversion module is disposed in the accommodating space and has two upper wires and two lower wires. The two upper wires are connected to the circuit through the guiding holes, and the two lower wires are connected to the lamp cap.

The LED bulb of the present invention can be directly conducted by the lamp cup by directly arranging a circuit on the lamp cup and then directly bonding the plurality of LED chips to the circuit, so that the heat generated when the LED chip emits light can be directly conducted by the lamp cup. And discharging to the outside without further heat resistance, so that the heat generated when the LED chip emits light can be quickly derived, and the plurality of convection holes and the lamp cup penetrating the convection space on the shell wall are utilized. The plurality of heat dissipation fins connecting the convection space and the external plurality of heat dissipation slots can convect the hot air in the convection space and the external cold air, so that the hot air in the convection space can be quickly discharged, so that the plurality The heat sink fins can quickly cool down, so the overall heat dissipation effect is achieved. In particular, the plurality of LED chips are directly bonded to the lamp cup which is pre-wired, so that several assembly steps can be reduced, so that the assembly is convenient and quick. In particular, the plurality of through holes arranged in a ring shape on the substrate of the lamp cup enable the hot air in the space inside the lamp cover to flow into the plurality of heat dissipation grooves and the convection space and then discharge Externally, the space inside the lampshade can be maintained at an appropriate temperature, so that the plurality of LED chips can be prevented from being affected by a high temperature environment, thereby greatly extending the service life thereof. In addition, when the plurality of LED chips emit light, most of the light is projected through the lamp cover, and a small portion of the light is reflected by the lamp cover, and the reflected light is projected through the plurality of through holes. The plurality of heat dissipating grooves and the convection space can thereby make the lamp cup and the circumferential surface of the base transparently emit light.

10‧‧‧Base

11‧‧‧ shell wall

12‧‧‧Circle

13‧‧‧Accommodation space

14‧‧‧ Convection space

15‧‧‧ convection hole

20‧‧‧light cup

21‧‧‧ bolt

22‧‧‧Substrate

23‧‧‧ Circuitry

24‧‧‧ Heat sink fins

240‧‧‧ convex

25‧‧‧heat sink

26‧‧‧Perforation

27‧‧‧through hole

28‧‧‧Circle

29‧‧‧Cut hole

30‧‧‧LED chip

40‧‧‧Fixed cover

41‧‧‧Bump

42‧‧‧Guide

43‧‧‧ Groove

50‧‧‧rings

51‧‧‧ Ring groove

52‧‧‧ring inserts

53‧‧‧ buckle

54‧‧‧Kakong

60‧‧‧shade

61‧‧‧ ring convex

62‧‧‧ card hook

70‧‧‧ lamp holder

80‧‧‧Power Conversion Module

81‧‧‧Upper wire

82‧‧‧Down wire

Figure 1 is a perspective exploded view of the present invention.

Figure 2 is a schematic enlarged view of the three-dimensional combination of the present invention.

Figure 3 is an enlarged schematic cross-sectional view of the combination of the present invention.

Fig. 4 is a perspective exploded view showing the LED chip and the lamp cup of the present invention.

Fig. 5 is a schematic enlarged view showing the three-dimensional combination of the LED chip and the lamp cup of the present invention.

Fig. 6 is an enlarged schematic cross-sectional view showing the combination of the LED chip and the lamp cup of the present invention.

Figure 7 is a schematic diagram of heat dissipation convection when the lamp cap of the present invention is installed downward.

Fig. 8 is a schematic view showing the heat dissipation convection when the lamp cap of the present invention is mounted upward.

Referring to FIGS. 1 to 6 , the LED light bulb of the present invention includes a base 10 , a light cup 20 , a plurality of LED chips 30 , a fixed cover 40 , a trim ring 50 , a lamp cover 60 , and a lamp cap . 70 and a power conversion module 80. among them: The base 10 is made of a plastic material, and has a shell wall 11 having a small end and a large end, and a ring wall 12 located inside the shell wall 11. The inner side of the annular wall 12 is surrounded by a receiving space 13 which is open toward the head end. The annular wall 12 and the casing wall 11 form an annular convection space 14 which is open toward the head end. The outer peripheral surface of the casing wall 11 has a plurality of convection holes 15 penetrating into the convection space 14, and the peripheral surface of the tail end has an external thread.

The lamp cup 20 is made of a composite material such as an electronic ceramic or a heat conductive plastic having high thermal conductivity and good insulation, for example, it can be made of a composite material containing aluminum oxide, aluminum nitride, tantalum carbide or yttrium oxide. to make. The lamp cup 20 is screwed to the head end of the casing wall 11 of the base 10 by a plurality of bolts 21 to cover the opening of the convection space 14. The lamp cup 20 includes a substrate 22, a circuit 23 disposed on a top surface of the substrate 22, and a plurality of heat dissipation fins 24 integrally formed on the bottom surface of the substrate 22. A plurality of heat dissipation grooves 25 are formed between the plurality of heat dissipation fins 24 and the outer surface of the plurality of heat dissipation fins 24, and the bottom surfaces of the plurality of heat dissipation fins 24 respectively have a convex portion 240 for being embedded in the shell wall 11. In the opening. The center of the top surface of the substrate 22 has a through hole 26 penetrating to the bottom portion, and has a plurality of through holes 27 which are arranged in a ring shape and penetrate through the plurality of heat dissipation grooves 25, respectively, near the periphery. The top surface of the substrate 22 is further provided with a ring groove 28 on the outer periphery of the plurality of through holes 27, and the ring groove 28 is provided with a plurality of button holes 29.

The plurality of LED chips 30 are coupled to the circuit 23 for emitting light.

The fixing cover 40 covers the opening of the receiving space 13 and has A protruding post 41 protrudes into the through hole 26, and an end surface of the protruding post 41 has a guiding hole 42 extending through the bottom surface to communicate with the receiving space 13. The bottom of the fixing cover 40 has a recess 43 for receiving the upper end edge of the ring wall 12.

The ring 50 is disposed on the top surface of the substrate 22, and the top mask of the ring 50 has a ring groove 51. The bottom surface has a ring insert 52 and a plurality of hooks 53. The outer groove wall of the annular groove 51 has a plurality of holes 54 extending through the outer peripheral surface. The ring insert 52 is embedded in the annular groove 28 of the substrate 22, and the plurality of hooks 53 are elastically hooked respectively. The plurality of button holes 29 of the substrate 22 are such that the ring 50 is detachably coupled to the substrate 22 of the lamp cup 20.

The lamp cover 60 is semi-spherical, and has a ring protrusion 61 for inserting into the ring groove 51 of the ring 50 on the open end face. The ring protrusion 61 has a plurality of hooks 62 for elastically hooking into the plurality of card holes 54 of the ring 50, so that the lamp cover 60 can be detachably coupled to the ring 50 for the plural The LED chip 30 is disposed on the inner side and is transparent to the light of the plurality of LED chips 30.

The base 70 has internal threads for threading on the external threads of the rear end of the casing wall 11, which are available for screwing onto a bulb socket (not shown).

The power conversion module 80 is disposed in the accommodating space 13 and has a function of voltage regulation and conversion of alternating current into direct current. The power conversion module 80 has two upper wires 81 and two lower wires 82. The two upper wires 81 are connected to the circuit 23 through the guide holes 42 of the fixing cover 40. The two lower wires 82 are connected to the same. The lamp head 70 is guided.

Please refer to Figure 7, which indicates that the lamp head 70 is mounted face down. When the ground is used, external cold air flows into the convection space 14 from the convection hole 15, and the hot air in the convection space 14 and the heat of the heat dissipation fin 24 are discharged from the heat dissipation groove 25 to the outside. Therefore, the convection space 14 can form a heat dissipation convection state through the communicating convection holes 15 and the heat dissipation slots 25, so that the hot air in the convection space 14 and the heat of the heat dissipation fins 24 can be quickly discharged, and The heat sink fins 24 are rapidly cooled by the cold air flowing in from the outside.

Referring to FIG. 8, it is pointed out that when the lamp holder 70 is used upwardly, external cold air flows into the convection space 14 from the heat dissipation groove 25, and the hot air in the convection space 14 and the The heat of the heat dissipating fins 24 is discharged from the convection hole 15 so that the convection space 14 can form a heat convection state through the communicating convection holes 15 and the heat dissipating grooves 25, so that the hot air in the convection space 14 The heat of the heat dissipation fins 24 can be quickly discharged, and the heat dissipation fins 24 can be quickly cooled by the cold air flowing in from the outside.

Since the LED bulb of the present invention has the special structural design described above, it has the following advantages:

1. The present invention is designed such that the circuit 23 is directly disposed on the lamp cup 20, and then the plurality of LED chips 30 are directly bonded to the circuit 23, so that the heat generated by the LED chip 30 can be directly generated. The lamp cup 20 is quickly conducted and discharged to the outside without any other thermal resistance, so that the heat generated when the LED chip 30 emits light can be quickly derived, and the shell wall 11 is used to penetrate the The plurality of convection holes 15 of the convection space 14 and the plurality of heat dissipation fins 24 of the lamp cup 20 communicate with the convection space 14 and the plurality of external heat dissipation slots 25, The hot air in the convection space 14 can be convected with the external cold air, so that the heat in the convection space 14 and the heat of the heat dissipation fins 24 can be quickly discharged, and the plurality of heat dissipation fins can be 24 can quickly cool down, so the overall heat dissipation effect.

2. The plurality of LED chips 30 of the present invention are directly coupled to the lamp cup 20 in which the circuit 23 is pre-wired, so that several assembly steps can be reduced, so that assembly can be facilitated and quick.

3. The present invention can make the hot air in the inner space of the lamp cover 60 flow into the plurality of heat dissipation slots 25 and the convection space 14 by using a plurality of through holes 27 arranged in a ring shape on the substrate 22 of the lamp cup 20. The discharge to the outside allows the space inside the lamp cover 60 to be maintained at an appropriate temperature, so that the plurality of LED chips 30 can be prevented from being affected by a high temperature environment, so that the service life thereof can be greatly extended.

4. When the plurality of LED chips 30 of the present invention emit light, most of the light is projected through the light cover 60, and a small portion of the light is reflected by the light cover 60, and the reflected light is transmitted through the light. The plurality of through holes 27 are projected into the plurality of heat dissipation grooves 25 and the convection space 14, whereby the circumferential surface of the lamp cup 20 and the base 10 can be made to emit a gentle light. Please refer to Chapters 7 and 8. The figure shows.

10‧‧‧Base

11‧‧‧ shell wall

12‧‧‧Circle

13‧‧‧Accommodation space

14‧‧‧ Convection space

15‧‧‧ convection hole

20‧‧‧light cup

21‧‧‧ bolt

22‧‧‧Substrate

23‧‧‧ Circuitry

24‧‧‧ Heat sink fins

240‧‧‧ convex

25‧‧‧heat sink

26‧‧‧Perforation

27‧‧‧through hole

28‧‧‧Circle

29‧‧‧Cut hole

30‧‧‧LED chip

40‧‧‧Fixed cover

41‧‧‧Bump

42‧‧‧Guide

50‧‧‧rings

51‧‧‧ Ring groove

52‧‧‧ring inserts

53‧‧‧ buckle

54‧‧‧Kakong

60‧‧‧shade

61‧‧‧ ring convex

62‧‧‧ card hook

70‧‧‧ lamp holder

80‧‧‧Power Conversion Module

81‧‧‧Upper wire

82‧‧‧Down wire

Claims (9)

An LED light bulb comprising: a base having a shell wall having a large end and a small end end; and a ring wall located inside the shell wall, the inner side of the ring wall enclosing a receiving space toward the head end, the ring A convection space is formed between the wall and the shell wall, and the outer peripheral surface of the shell wall has a plurality of convection holes penetrating into the convection space; a lamp cup is high in thermal conductivity and good in insulation. a composite material, which is coupled to the opening end of the shell wall for covering an opening of the convection space, the lamp cup comprising a substrate, a circuit disposed on one side of the substrate, and being radially formed integrally on the substrate a plurality of heat dissipating fins on the side surface, wherein the plurality of heat dissipating fins respectively form a plurality of heat dissipating grooves connecting the convection space and the outer portion, wherein the center of the substrate has a through hole penetrating to the bottom portion, and has an annular arrangement near the periphery and a plurality of through holes respectively penetrating into the plurality of heat dissipation slots; a plurality of LED chips are coupled to the circuit; a fixing cover covers the opening of the receiving space, and has a protrusion protruding into the through hole, the protrusion End mask of the column a guiding hole is connected to the bottom surface to communicate with the receiving space; a decorative ring is detachably coupled to the substrate of the lamp cup; a lamp cover is detachably coupled to the decorative ring for the plurality of LED chips The cover is disposed on the inner side and is permeable to the light of the plurality of LED chips; a lamp cap is coupled to the tail end of the shell wall for screwing onto a bulb socket; a power conversion module is disposed in the accommodating space and has two upper wires and two lower wires, and the two upper wires are connected to the circuit through the guiding holes, and the two lower wires are connected to the lamp head . The LED light bulb of claim 1, wherein the lamp cup is made of an electronic ceramic material containing any one of alumina, aluminum nitride, tantalum carbide or ruthenium oxide. The LED light bulb of claim 1, wherein the light cup is made of a thermally conductive plastic. The LED light bulb of claim 1, wherein the bottom surfaces of the plurality of heat dissipation fins respectively have a convex portion for being embedded in the opening of the shell wall. The LED light bulb of claim 1, wherein the light cup is screwed to the base by a plurality of bolts. The LED light bulb of claim 1, wherein the ring has a ring groove, and the bottom edge of the lamp cover has a ring protrusion for being embedded in the ring groove. The LED light bulb of claim 6, wherein the outer groove wall of the ring groove has a plurality of card holes penetrating to the outer peripheral surface, and the ring protrusion portion has a plurality of hooks for respectively elastically hooking on the plurality of cards In the hole. The LED light bulb of claim 1, wherein the fixing cover has a recess opposite to a side of the protruding post for receiving an upper end edge of the annular wall. The LED light bulb of claim 1, wherein the peripheral surface of the tail end of the shell wall has an external thread, and the base has an internal thread for screwing on the external thread.