CN202158376U - light emitting diode bulb structure - Google Patents

Abstract

The utility model provides a light-emitting diode bulb structure, which comprises a light-transmitting cover and an electric connection seat, a heat radiation body and an assembly seat which are arranged between the light-transmitting cover and the electric connection seat, at least one light source substrate which is accommodated in the light-transmitting cover, and a power conversion plate which is electrically connected with the light source substrate and the electric connection seat, wherein the heat radiation body is internally provided with an installation space for accommodating the power conversion plate; the heat radiator is provided with a combination wall surface surrounding the area for combining the light source substrate, and the periphery of the light source substrate is provided with a corresponding binding surface which is tightly jointed with the combination wall surface so as to fix the light source substrate on the heat radiator; the light source substrate is tightly fixed by tightly jointing the light source substrate and the combination wall surface, so that the deformation caused by temperature is inhibited; and because the light source substrate is tightly combined with the heat dissipation body, the heat dissipation body has good heat conduction capability.

Description

light emitting diode bulb structure

technical field

The utility model relates to a light emitting diode light bulb structure, in particular to a light bulb structure in which a light emitting diode substrate and a radiator are tightly combined.

Background technique

Since light-emitting diodes (LEDs) have many advantages such as long service life, low power consumption, high brightness, and more environmentally friendly materials, with the progress of light-emitting diode manufacturing processes and the decline in costs, in addition to the signs used in traffic lights or electrical appliances In addition to the number, it is further used in environmental decoration and lighting lamps. In order to allow light-emitting diodes to be applicable to general light bulbs, existing known technologies combine light-emitting diodes with known light bulb shells, such as China Taiwan Patent Certificate No. I293807 "Light-Emitting Diode Light Bulbs with Constant Current Circuits", the previous patent A light-emitting diode bulb is disclosed, which includes a lamp cap, a lamp shell, a plurality of series-connected light-emitting diodes and a step-down constant current circuit. The lamp cap has electrodes connected to the power supply, and a plurality of LEDs are connected to the step-down constant current circuit to provide a constant current to make the LEDs emit light. The LED bulbs can be directly used after being mounted on a commonly used lamp holder. . However, since a stable DC current is required to drive the light-emitting diode, the drive circuit that converts the AC mains power into a DC current will continuously generate and accumulate waste heat during the conversion process. Moreover, the direct current passing through the impedance of the light-emitting diodes also generates a lot of waste heat. Excessive temperature under long-term use will damage the light-emitting diodes or the driving circuit, or reduce the service life.

Therefore, the industry has developed a variety of LED light bulbs with heat dissipation structures, such as China Taiwan Patent No. I338106 "LED Lamp", which discloses that an LED lamp includes a light-emitting device. unit, a circuit board for driving and controlling the LED unit and an inner lens. Wherein the circuit board is placed in a second accommodating space of a metal lamp cup, the LED unit is placed in a first accommodating space of the metal lamp cup, and has a thermally conductive substrate and a High-power light-emitting diode chips on substrates. It can be seen from the attached drawings of the previous application that the substrate on which the high-power light-emitting diode chip is installed is locked on the metal lamp cup by a plurality of screws, and the substrate is only positioned by these screws.

Another previous case, such as China Taiwan Patent Certificate No. M350675 "LED Lamp and Its Cover Structure", disclosed that an LED lamp includes a buckle-type heat dissipation fin set and an LED module, wherein the buckle-type heat dissipation fin set An accommodating space is formed around the interior, and the LED module is accommodated in the accommodating space and connected to the cooling fin group. The prior art can be clearly seen in the drawings, the circuit board of the LED module is fixed on the cooling fin assembly by screws.

The previous technology of using screws to lock the LED substrate also includes prior applications such as Taiwan Patent Certificate No. M365440.

In order to more clearly show the absence of the light-emitting diode substrate locked by screws, please refer to Figures 1 and 2 together. 1 and 2 disclose the structure of a known light emitting diode bulb, which includes a lampshade 90 , a light emitting diode substrate 91 , a radiator 92 , a power conversion board 93 , and a socket 94 . One end of the radiator 92 is combined with the power socket 94 , and the power conversion board 93 is accommodated between the radiator 92 and the socket 94 . The other end of the heat sink 92 has a bearing surface 921 , a plurality of screw holes 922 disposed on the bearing surface 921 , and a wiring hole 923 passing through the bearing surface 921 . The LED substrate 91 has a plurality of LEDs 911 and a plurality of screw holes 912 corresponding to the positions of the screw holes 922 . The known technology uses a plurality of screws 95 to pass through the screw holes 912 , 922 to fix the LED substrate 91 on the bearing surface 921 of the heat sink 92 . The problem is that if only the screws 95 are used to lock the LED substrate 91 , only the surroundings of the screws 95 can be completely attached to the radiator 92 . Moreover, if an aluminum substrate is used as the LED substrate 91 to install the LEDs 911, the LEDs 911 will be deformed due to temperature rise when the LEDs 911 heat up. , The temperature is different to produce different deformation states. As a result, parts that are some distance away from the screw 95 cannot be tightly bonded to the radiator 92 due to thermal expansion and contraction, so that the speed of heat conduction between the LED substrate 91 and the radiator 92 is significantly reduced, directly affecting the LED substrate 91. The temperature rises faster. If the temperature of the LED substrate 91 rises higher, the deformation will be more obvious, resulting in a vicious cycle of poor heat dissipation.

Utility model content

Because the known light-emitting diode bulbs use screws to fix the light-emitting diode substrate, although the technical level is very simple, it increases the man-hours, and the temperature rise causes the light-emitting diode substrate to deform, which may affect the heat conduction effect between the radiator and the heat sink, causing heat A vicious circle of ineffective export.

The utility model provides a light-emitting diode light bulb structure, which comprises a light-transmitting cover and a power connection seat, a radiator and an assembly seat installed between the light-transmitting cover and the power connection seat, at least one The light source substrate in the cover, and a power conversion board electrically connected to the light source substrate and the electric socket, wherein the cooling body has an installation space for accommodating the power conversion board, wherein the cooling body has a surrounding area for combining A bonding wall surface in the region of the light source substrate, the periphery of the light source substrate has a corresponding bonding surface that is tightly bonded to the bonding wall surface so that the light source substrate is fixed on the heat sink; the light source substrate is tightly bonded to the bonding wall surface , so that the light source substrate is urgently fixed to suppress deformation caused by temperature; and because the light source substrate is tightly combined with the radiator, it has good thermal conductivity.

In the LED light bulb structure described in the present invention, the outer diameter of the light source substrate is greater than or equal to the inner diameter of the combined wall.

In the LED light bulb structure described in the present invention, the cooling body is further provided with a support portion having a thickness difference from the combined wall surface under the light source substrate to support the light source substrate.

In the light emitting diode light bulb structure described in the present utility model, the assembly seat has an insulating wall to partition a circuit accommodation space for accommodating the power conversion board, and the assembly seat is provided with a shielding portion attached to the heat sink The lower edge of the body is used to close the lower opening of the installation space.

Furthermore, the light emitting diode light bulb also includes an isolator arranged in the installation space, and the insulator includes a partition wall between the power conversion board and the radiator to form a space for accommodating the power conversion board. A circuit accommodating space and an outlet hole on the partition wall allow the power conversion board to go out and connect to the light source substrate. The inner edge of the insulation wall is tightly joined to the partition wall. ; The power conversion board is separated by the partition wall, thereby complying with strict safety tests.

In the light emitting diode light bulb structure described in the present invention, the assembly base and the radiator have at least a first positioning portion and a second positioning portion that are buckled correspondingly.

In the light emitting diode light bulb structure described in the present invention, the first positioning portion and the second positioning portion are protrusions and notches that are buckled correspondingly.

In the light emitting diode light bulb structure described in the present invention, the assembly seat has a joint part located outside the installation space and combined with a power socket.

In the light emitting diode light bulb structure described in the utility model, the isolator is provided with a protruding part on the periphery of the outlet hole.

In the light emitting diode light bulb structure described in the present invention, the light source substrate has a wiring hole communicating with the installation space through which at least one power wire passes through to electrically connect with the light source substrate.

In the LED light bulb structure described in the present invention, the protruding part is embedded in the wiring hole of the light source substrate.

In the light emitting diode light bulb structure described in the present invention, the light source substrate has a wiring hole communicating with the installation space through which at least one power wire passes through to electrically connect with the light source substrate.

In the light emitting diode bulb structure described in the present invention, the light source substrate is an aluminum substrate including a plurality of conductive lines.

In the LED light bulb structure described in the present invention, the radiator has a plurality of heat dissipation fins arranged in layers, and the heat dissipation fins have a plurality of through holes forming at least one airflow channel.

In the light emitting diode light bulb structure described in the utility model, the power conversion board is a switching power supply circuit.

Description of drawings

Fig. 1 is the exploded schematic diagram of known bulb;

Fig. 2 is a schematic sectional view of a known bulb;

Figure 3-1 is an exploded view of the utility model;

Figure 3-2 is a partial enlarged view of the radiator;

FIG. 4 is a schematic diagram of the assembly of the light-emitting diode bulb;

5 is a cross-sectional view of the light-emitting diode;

Fig. 6 is a cross-sectional view of another embodiment in which the isolator is tightly fitted with the assembly seat.

Detailed ways

The utility model provides a light-emitting diode light bulb structure, and the technical content of the utility model will be described below in conjunction with the accompanying drawings. Please refer to Fig. 3-1, Fig. 3-2, Fig. 4 and Fig. 5, Fig. 3-1 to Fig. 5 show the first embodiment of this case, the light bulb provided by the first embodiment includes a light-transmitting cover 5 And a power connection seat 6, a radiator 4 and assembly seat 2 installed between the light transmission cover 5 and the power connection seat 6, at least one light source substrate 40 accommodated in the light transmission cover 5, and an electric The power conversion board 3 that connects the light source substrate 40 and the power socket 6 is connected. Preferably, the power conversion board 3 is a switching power supply circuit. The radiator 4 has an installation space 41 for accommodating the power conversion board 3 . Wherein, the light source substrate 40 has a plurality of light emitting diodes 401 . The light source substrate 40 can be an aluminum substrate including a plurality of conductive lines. In the prior art, an aluminum substrate can be formed by stacking copper foil, heat-conducting insulating material and aluminum plates. After the copper foil is etched into a circuit, it is wrapped in a thermally conductive insulating material and an aluminum plate to form a light source substrate 40 including a conductive line. Since the aluminum substrate is a currently known technology, although the utility model uses the technology of the aluminum substrate, the The manufacturing technology and detailed structure of the aluminum substrate are not the technical focus of the present invention, so no more details are given here. In order to provide a better positioning method for the light source substrate 40 , the radiator 4 of the present invention has a surrounding bonding wall 410 , and the bonding wall 410 surrounds a region for bonding the light source substrate 40 . The peripheral edge of the light source substrate 40 has a bonding surface 400. By pressing the light source substrate 40 into the area surrounded by the bonding wall surface 410, the bonding surface 400 is pressed into contact with the bonding wall surface 410 correspondingly, and The light source substrate 40 is fixed on the radiator 4 . More specifically, the outer diameter of the peripheral bonding surface 400 of the light source substrate 40 is not smaller than the inner diameter of the bonding wall surface 410, so the light source substrate 40 is pressed into the bonding wall surface 410 by applying force, and the slight elasticity of the bonding wall surface 410 itself and The hardness will make the bonding wall 410 press against the mating surface 400 . The heat sink 4 also has a supporting portion 412 under the light source substrate 40 that has a thickness difference from the coupling wall 410 to support the light source substrate 40 . Through the aforementioned technology of tightly bonding the light source substrate 40 to the heat dissipation body 4 , the light source substrate 40 can be closely attached to the heat dissipation body 4 to achieve excellent heat conduction effect. Moreover, when the temperature of the light source substrate 40 rises, the tightness of the joint wall surface 410 can suppress the deformation of the light source substrate 40 and increase the heat conduction effect, so as to ensure that the heat conduction effect is not affected, which completely improves the lack of fixing by screws in the known technology. .

In order to make the light bulb pass the safety test, the assembly seat 2 includes a surrounding insulating wall 21 to separate a circuit accommodating space 7 for accommodating the power conversion board 3 , a shielding portion 23 and a connecting portion 22 . The insulating wall 21 is located between the power conversion board 3 and the radiator 4 , and the shielding portion 23 is attached to the lower edge of the radiator 4 to close the lower opening of the installation space 41 . Wherein, the assembly seat 2 is provided with a first positioning portion 211 in order to closely combine with the radiator 4 . The inner edge of the heat sink 4 has at least one second positioning portion 411 correspondingly engaged with the first positioning portion 211 on the assembly base 2 , thereby limiting the relative movement between the assembly base 2 and the heat sink 4 . The first positioning part 211 can be a longitudinal bump, or a horizontal bump, or a vertical and horizontal staggered bump (as shown in Figure 3-1), and the second positioning part 411 is the same as The first positioning portion 211 corresponds to the snap-fit notch. However, the present invention does not limit the specific shape of the first positioning part 211 and the second positioning part 411 to bumps or notches, as long as the first positioning part 211 and the second positioning part 411 can be easily changed corresponding to the buckle. It should be included in the protection scope of the present utility model. In order to further strengthen the insulation capability to protect the power conversion board 3, optionally, the light emitting diode bulb also includes an insulator 1, and the insulator 1 includes a partition wall between the power conversion board 3 and the radiator 4 10 , and an outlet hole 12 located on the partition wall 10 to enable the power conversion board 3 to connect to the light source substrate 40 . And in order to pass the safety test, the isolator 1 is provided with a protruding portion 13 around the outlet hole 12 to avoid high-voltage electric breakdown. In the embodiment shown in FIG. 3-1 , the end of the partition wall 10 has a fitting portion 11 combined with the upper end of the assembly seat 2 , so that the partition wall 10 covers the top of the power conversion board 3 , Around the sides, and close the opening above the assembly seat 2. Through the joint of the assembly base 2 and the isolator 1 , it is ensured that the power conversion board 3 is insulated and partitioned in the circuit accommodating space 7 .

The light source substrate 40 has a wiring hole 402 communicating with the installation space 41 . At least one power wire 30 connected to the power conversion board 3 can pass through the outlet hole 12 on the partition wall 10 and the wiring hole 402 on the light source substrate 40 to make the power conversion board 3 and the LEDs 401 electrically connected to each other. sexual connection. Moreover, the protruding portion 13 can be inserted into the wiring hole 402 .

Through the above-mentioned technology, the power conversion board 3 can be installed in the LED light bulb, and the power conversion board 3 can be isolated and protected in the circuit accommodating space 7 through the isolator 1 and the assembly seat 2 . Furthermore, there is an air gap between the isolation wall 10 of the isolation body 1 and the inner edge of the radiator 4 , which can ensure that the power conversion board 3 cannot be damaged by the high voltage test in the safety test.

It can also be seen in Fig. 3-1 to Fig. 5 that the joint portion 22 of the assembly seat 2 is located outside the installation space 41, and the joint portion 22 is combined with a joint end 61 of a power connection base 6, the power connection The base 6 is used for connecting to an external power source, and electrically connects the power conversion board 3 and the power connection base 6 through at least one power wire 31 , so as to send the power conducted from the external power source to the power conversion board 3 . Depending on the type of light bulb or the application environment, a variety of different shapes of the socket 6 can be selected. The shapes quoted in Figure 3-1 to Figure 5 are the shapes of ordinary household light bulbs, but the socket 6 is not limited to that shown in Figure 3 -1 to the form shown in Figure 5.

The radiator 4 is provided with a positioning groove 44 outside the combined wall surface 410, the positioning groove 44 is used to fix the aforementioned transparent cover 5, the transparent cover 5 has a neck 50, and the neck 50 can be tightly fitted on the The neck 50 is glued into the positioning groove 44 , or the neck 50 is glued into the positioning groove 44 through the structural design of glue or buckle.

What Fig. 6 shows is the sectional view of another embodiment of the light bulb, the difference between the embodiment of Fig. 6 and the first embodiment is that, because the isolator 1 is optional, the embodiment of Fig. 6 is not An example of installation of the separator 1 is given. It can be seen in FIG. 6 that the insulating wall 21 of the assembly base 2 extends upwards to connect with the light source substrate 40, and the power wire 30 of the power conversion board 3 directly passes through the opening above the assembly base 2 and the wiring hole 402, and It is electrically connected with the light source substrate 40 . Since the insulating wall 21 still completely separates the power conversion board 3 and the heat sink 4 , it still has good insulating ability to pass the safety test.

In the aforementioned first embodiment shown in FIGS. 3-1 to 5 and the second embodiment shown in FIG. 6 , a plurality of cooling fins 42 are stacked on the outer edge of the cooling body 4 , and between the cooling fins 42 Has gaps for air circulation. Moreover, the heat dissipation fins 42 have a plurality of through holes 43 , and the plurality of through holes 43 of the plurality of heat dissipation fins 42 are arranged correspondingly and pass through the heat dissipation body 4 to form at least one airflow channel for air to pass through longitudinally. The gaps between the heat dissipation fins 42 and the airflow channels allow horizontal and vertical airflow to flow, and provide a large air contact area to achieve excellent heat dissipation effects.

The above descriptions are only preferred feasible embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, all equivalent technical changes made by using the utility model are included in the protection scope of the present utility model.

Claims (15)

1. A light-emitting diode light bulb structure, comprising a light-transmitting cover (5) and a power-connecting seat (6), a radiator ( 4) and an assembly seat (2), at least one light source substrate (40) arranged in the light transmissive cover (5), and a power conversion device electrically connecting the light source substrate (40) and the power connection seat (6) plate (3), the cooling body (4) has an installation space (41) for accommodating the power conversion plate (3), characterized in that, The radiator (4) has a bonding wall surface (410) surrounding the area for bonding the light source substrate (40), and the periphery of the light source substrate (40) has a corresponding bonding surface (400) and the bonding wall surface ( 410) press-bonding to fix the light source substrate (40) on the radiator (4). 2. The LED light bulb structure according to claim 1, characterized in that, the outer diameter of the light source substrate (40) is greater than or equal to the inner diameter of the combined wall surface (410). 3. The light emitting diode light bulb structure according to claim 1, characterized in that, the heat sink (4) is also provided under the light source substrate (40) with a thickness difference from the combined wall surface (410) to support the light source substrate Support portion (412) of (40). 4. The light emitting diode light bulb structure according to claim 1, characterized in that, the assembly base (2) has an insulating wall (21) to partition a circuit accommodating space for accommodating the power conversion board (3) (7), and the assembly seat (2) is provided with a shielding portion (23) attached to the lower edge of the radiator (4) to close the lower opening of the installation space (41). 5. The light emitting diode light bulb structure according to claim 1, characterized in that, the light emitting diode light bulb further comprises an isolator (1) arranged in the installation space (41), and the isolator (1) comprises A partition wall (10) between the power conversion board (3) and the radiator (4), and an outlet hole (12) for the power conversion board (3) to be connected to the light source substrate (40). The inner edge of the wall (21) is in tight engagement with the partition wall (10). 6. The light emitting diode light bulb structure according to claim 5, characterized in that, the assembly base (2) and the radiator (4) have at least one first positioning part (211) and a second positioning part (411). 7. The LED light bulb structure according to claim 6, characterized in that, the first positioning portion (211) and the second positioning portion (411) are protrusions and notches that are buckled correspondingly. 8. The light emitting diode bulb structure according to claim 5, characterized in that, the assembly seat (2) has a joint portion (22) located outside the installation space (41) and combined with a power socket (6) ). 9. The light emitting diode light bulb structure according to claim 5, characterized in that, the isolator (10) is provided with a protruding portion (13) around the periphery of the wire outlet hole (12). 10. The LED light bulb structure according to claim 9, characterized in that, the light source substrate (40) has a wiring hole (402) communicating with the installation space (41) for at least one power wire (30) Pass through and be electrically connected with the light source substrate (40). 11. The light emitting diode light bulb structure according to claim 10, characterized in that, the protrusion (13) is embedded in the wiring hole (402) of the light source substrate (40). 12. The LED light bulb structure according to claim 4, characterized in that, the light source substrate (40) has a wiring hole (402) communicating with the installation space (41) for at least one power wire (30) Pass through and be electrically connected with the light source substrate (40). 13. The LED light bulb structure according to claim 1, characterized in that the light source substrate (40) is an aluminum substrate including a plurality of conductive lines. 14. The light emitting diode light bulb structure according to claim 1, characterized in that, the heat sink (4) has a plurality of heat dissipation fins (42) arranged in layers, and the heat dissipation fins (42) have at least one through formation. A plurality of through holes (43) for an airflow channel. 15. The LED light bulb structure according to claim 1, characterized in that, the power conversion board (3) is a switching power supply circuit.

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