CN103016987A - led light bulb - Google Patents

Abstract

The invention discloses an LED bulb, which comprises a heat radiation body and an LED light source, wherein the LED light source consists of a flexible circuit board and LED chips uniformly arranged on the flexible circuit board; the electrode contact is arranged at one end of the flexible circuit board, and the electrical connection between the LED light source and the LED driving power supply can be completed only by electrically connecting the flexible circuit board and the LED driving power supply through the electrode contact, so that the electrical connection operation between the LED light source and the LED driving power supply is simplified, the production efficiency can be improved, and the production cost can be reduced.

Description

led light bulb

technical field

The invention relates to the field of LED lighting, in particular to an LED light bulb with good heat dissipation effect.

Background technique

At present, LED light sources are gradually replacing incandescent and fluorescent light sources with the characteristics of long life, no pollution, and high luminous efficiency. Therefore, LED bulbs using LEDs as light sources have appeared. In order to solve the heat dissipation problem of LEDs, LED bulbs are generally composed of lamp caps, radiators, LED light sources and lampshades. The lamp caps, radiators and lampshades are connected in sequence. The LED light source is installed on the radiator, and the heat generated by the LED light source is dissipated by the radiator. With the gradual development of LED light bulbs, the existing LED light sources are generally composed of several LED light panels installed with LEDs, but the LED light sources of existing LED bulbs are installed in different ways. Install it on the top of the radiator in a triangular or four-corner shape, or attach and fix several LED lamp panels on the side wall of the heat conducting core in the center of the radiator. No matter which installation method is used, the installation of the LED light source needs to The LED light boards are installed one by one, which requires a large amount of manpower for the installation operation; moreover, the electrical connection process between each LED light board and the driving circuit is complicated, and each LED light board and the driving circuit need to be electrically connected to each other. The connecting wires are welded, or each LED light board is electrically connected to a connecting circuit board by welding, and then the connecting circuit board is electrically connected to the driving circuit. The operation of the process is complicated, and the welding process is difficult. There are many welding points, poor welding can easily lead to desoldering, if desoldering, it will cause open circuit of LED light source, poor stability.

Therefore, how to simplify the installation operation and electrical connection operation of the LED light source, improve the stability of the electrical connection inside the LED bulb, and realize the efficient heat dissipation of the LED bulb are technical problems to be solved urgently in the industry.

Contents of the invention

The main purpose of the present invention is to provide an LED light bulb, which aims to simplify the installation operation and electrical connection operation of the LED light source, improve production efficiency, improve the stability of the electrical connection inside the LED light bulb, and realize efficient heat dissipation of the LED light bulb.

The present invention proposes an LED light bulb, which includes a lamp cap connected in sequence, a radiator and a lampshade. The radiator includes a heat sink and a heat conducting core connected to the upper end of the heat sink. An LED light source is installed on the heat conducting core. The LED light source is composed of a flexible circuit board and several LED chips evenly mounted on the flexible circuit board, the flexible circuit board is folded around the heat conduction core to form a shape suitable for the heat conduction core, the flexible circuit board The back of the circuit board is attached and fixed to the surface of the heat conducting core; an electrode contact is provided at one end of the flexible circuit board, and the electrode contact is covered by the other end of the flexible circuit board; Wire holes are arranged on the top, and the wires electrically connected to the electrode contacts pass through the wire holes to connect with the LED driving power supply.

Preferably, the flexible circuit board is pasted and fixed on the side wall of the heat-conducting core by a heat-conducting adhesive.

Preferably, the flexible circuit board includes an electrical connection portion disposed at one end of the flexible circuit board, the electrode contacts are disposed on the electrical connection portion, and the wire holes are disposed around the electrical connection portion.

Preferably, the heat conduction core is a cylinder or a platform, and the flexible circuit board includes a side circuit board adapted to the shape of the side wall of the heat conduction core after being folded and a top surface of the heat conduction core after being folded. Adapted top circuit board.

Preferably, the heat conducting core is in the shape of a cylinder, a right prism, a truncated cone or a truncated prism.

Preferably, the heat conduction core is a cone, and the flexible circuit board is folded around the side wall of the heat conduction core.

Preferably, the heat conduction core is in the shape of a cone or a regular pyramid.

Preferably, the heat conduction core is arcuate, "U" shaped or arch bridge shaped.

Preferably, both the heat sink and the heat conduction core are made of high thermal conductivity copper, copper alloy, aluminum or aluminum alloy, and a number of heat dissipation ribs are uniformly arranged on the outer wall of the heat sink; the heat conduction core is set At the central position of the upper end of the heat sink, the heat conduction core is integrally formed with the heat sink or fixed through threaded connection.

Preferably, the lamp head is fixed on the lower end of the heat sink through screw connection, the LED drive power is connected to the lamp head, and the LED drive power is installed at the connection between the lamp head and the heat sink.

The beneficial effects of the LED bulb of the present invention are:

1. The installation of the LED light source is simple and fast: the LED light source is composed of a flexible circuit board and a number of LED chips evenly installed on the flexible circuit board. Because the flexible circuit board is relatively soft and foldable, the flexible circuit board can be rolled around the heat-conducting core. Form a shape suitable for the heat conduction core. When installing the LED light source, you only need to fold the flexible circuit board around the shape of the heat conduction core, and use glue to paste the flexible circuit board on the outer surface of the heat conduction core to complete the LED light source. Installation, one step in place, simple and fast installation and operation, easy to produce, can improve production efficiency.

2. The electrical connection between the LED light source and the LED drive power supply is easy to operate, the welding point is protected, it is not easy to desolder, and the stability is good: since all the LED chips in the LED light source are installed on the same flexible circuit board, you only need to Set a pair of electrode contacts on the flexible circuit board, use a wire that is electrically connected to the LED drive power supply at one end to weld the electrode contacts, so that the flexible circuit board is electrically connected to the LED drive power supply, and the LED light source and the LED drive power supply can be completed. Electrical connection, unlike the original LED light source, it is not necessary to connect the LED light board to the LED drive power supply one by one, which simplifies the electrical connection operation between the LED light source and the LED drive power supply, and greatly reduces the workload of this process , can improve production efficiency and reduce production cost; there is only one pair of electrode contacts, so there is only one pair of welding points, the number is small, and the electrode contacts are set at one end of the flexible circuit board. After the LED light source is installed, the electrode contacts are covered by the flexible circuit board. The other end of the flexible circuit board is covered, so that the welding point between the electrode contact and the connecting wire is also covered by the other end of the flexible circuit board, so that the welding point will not be exposed, and the welding point can be protected, so that it is not easy to desolder. LED light source The stability of the electrical connection with the LED driving power supply is good, which can improve the quality of LED light bulb products.

3. When the LED light source is turned on, the light distribution is uniform: the LED chips are evenly installed on the flexible circuit board, and the flexible circuit board is pasted and fixed around the surface of the heat-conducting core, so that the LED chips are evenly distributed on the surface of the heat-conducting core. When the LED light source is turned on, the LED chip The emitted light is evenly distributed without shadows.

4. Excellent heat dissipation effect: the flexible circuit board is pasted on the outer surface of the heat conducting core, and the flexible circuit board is in full contact with the heat conducting core. The heat conducting core can quickly conduct the heat generated by the LED light source to the heat sink, and the heat is quickly dissipated by the heat sink In the air, the heat dissipation effect is good, which can prevent the LED light source from overheating and prolong the service life of the LED light source.

Description of drawings

Fig. 1 is a structural schematic diagram of a radiator in which the thermal conduction core is a cylinder in an embodiment of the LED light bulb of the present invention;

Fig. 2 is a front view of the unfolded flexible circuit board when the heat conducting core is in the form of a cylinder in an embodiment of the LED light bulb of the present invention;

Fig. 3 is a structural schematic diagram of a heat sink with an LED light source installed when the heat conducting core is a cylinder in an embodiment of the LED light bulb of the present invention;

Fig. 4 is a perspective view of a radiator installed with an LED light source when the heat conducting core is in the form of a cylinder in an embodiment of the LED light bulb of the present invention;

Fig. 5 is a schematic structural view of the LED bulb when the heat conducting core is in the form of a cylinder in an embodiment of the LED bulb of the present invention;

6 is an exploded view of the structure of the heat sink when the heat conducting core and the heat sink are designed separately in an embodiment of the LED light bulb of the present invention;

Fig. 7 is a structural schematic diagram of a heat sink with a heat conducting core in the form of a cone in an embodiment of the LED light bulb of the present invention

Fig. 8 is a front view of the unfolded flexible circuit board when the heat conducting core is in the form of a cone in an embodiment of the LED light bulb of the present invention;

Fig. 9 is a schematic structural view of the LED bulb when the heat conducting core is in the shape of a cone in an embodiment of the LED bulb of the present invention;

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Referring to Fig. 1 to Fig. 5, an embodiment of the LED light bulb of the present invention is proposed. The LED light bulb includes a lamp cap 1, a radiator 2 and a lampshade 3 connected in sequence. The heat conduction core 100 is equipped with an LED light source on the heat conduction core 100 , and the LED light source is covered in the lampshade 3 . The LED light source consists of a flexible circuit board 20 and a number of LED chips 201 uniformly mounted on the flexible circuit board 20. The circuit board 20 is soft and foldable, and the flexible circuit board 20 can be folded around the heat conduction core 100 to form a shape compatible with the heat conduction core 100; when installing the LED light source, the flexible circuit board 20 is folded around the heat conduction core 100, and The installation of the LED light source can be completed by pasting the flexible circuit board 20 on the outer surface of the heat-conducting core 100 with glue. The installation of the LED light source is completed in one step. The installation operation is simple, fast, easy to produce, and can improve production efficiency.

The heat conduction core 100 can be set as a cylinder or a platform, and the flexible circuit board 20 includes a side circuit board 200 adapted to the shape of the side wall of the heat conduction core 100 after being folded and a top surface adapted to the top surface of the heat conduction core 100 after being folded. The surface circuit board 210, after the LED light source is installed, the flexible circuit board 20 is wrapped on the outer surface of the heat conduction core 100, the side circuit board 200 is attached to the side wall surface of the heat conduction core 100, and the top surface circuit board 210 is connected to the top surface of the heat conduction core 100 fit. In order to make the LED light bulb 360° uniform, the wire core is arranged at the center of the upper end surface of the heat sink 10, and the heat conduction core 100 is in the shape of a cylinder, a right prism, a circular truncated prism or a positive prism; in this embodiment, the heat conduction core 100 is set as a cylinder When the flexible circuit board 20 is unfolded, the side circuit board 200 is rectangular, and the top circuit board 210 is circular. The flexible circuit board 20 is formed by cutting and processing. sexual connection.

The lamp cap 1 is fixed on the lower end of the heat sink 10 through threaded connection, an LED driving power is connected with the lamp cap 1 , and the LED driving power is installed at the joint between the lamp cap 1 and the heat sink 10 . Since all the LED chips 201 in the LED light source are mounted on the same flexible circuit board 20 , the LED chips 201 on the flexible circuit board 20 are connected in series, in parallel or in series/parallel through wiring on the flexible circuit board 20 . A pair of electrode contacts 221 are arranged on the flexible circuit board 20, and a wire hole 101 is arranged on the side wall of the heat conducting core 100. The wire is soldered to the electrode contact 221 through the wire hole 101, so that the electrical connection between the flexible circuit board 20 and the LED driving power can be completed, and the electrical connection between the LED light source and the LED driving power can be completed, without the need for the original LED light source. , it is necessary to connect the LED light board to the LED driving power one by one, which simplifies the electrical connection operation between the LED light source and the LED driving power, greatly reduces the workload of this process, improves production efficiency, and reduces production costs.

The flexible circuit board 20 includes an electrical connection portion 220 disposed at one end of the side circuit board 200 , the electrode contact 221 is disposed on the electrical connection portion 220 , and the wire hole 101 is disposed around the electrical connection portion 220 for convenience of wire welding. There is only one pair of electrode contacts 221, so there is only one pair of welding points, the number is small, and the probability of desoldering is not high; and after the LED light source is installed, the other end of the side circuit board 200 is joined to one end of the side circuit board 200, and the electrodes Contact 221 is covered by the other end of side circuit board 200, like this, the welding point between electrode contact 221 and connecting lead is also covered by the other end of side circuit board 200, thus this welding point can not be exposed outside, and welding point can be protected , It is not easy to desolder, which improves the stability of the electrical connection between the LED light source and the LED drive power supply, and the quality of the LED bulb product is improved.

The LED chips 201 are evenly installed on the flexible circuit board 20, and the flexible circuit board 20 is pasted and fixed around the surface of the heat conduction core 100, so that the LED chips 201 are evenly distributed on the surface of the heat conduction core 100, and the light emitted by the LED chip 201 is distributed when the LED light source is turned on. Uniform, no shadowing.

The heat sink 10 is in the shape of a rounded table, the area of the lower end is slightly smaller than the area of the upper end, and the lower end of the heat sink 10 is hollow, and the inner wall surface of the lower end of the heat sink 10 and the outer wall surface of the upper end of the lamp holder 1 are provided with matching threads. , The heat sink 10 and the lamp cap 1 are fixed through screw connection, and the LED driving power is installed at the hollow position of the lamp cap 1 and the lower end of the heat sink 10 . The heat conduction core 100 is hollow, and the wire hole 101 on the heat conduction core 100 communicates with the hollow position at the lower end of the heat sink 10 . The heat sink 10 includes a side wall extending upwards around the edge of the upper end of the heat sink 10 , corresponding threads are provided on the inner surface of the side wall and the outer wall of the lower end of the lampshade 3 , and the heat sink 10 and the lampshade 3 are fixed by screw connections. The heat sink 10 includes a circular arc surface 110 that can reflect light, and the circular arc surface 110 is formed by protruding upward at the center of the upper end surface of the heat sink 10; the heat conducting core 100 is arranged on the circular arc surface 110 and placed on the In the center of the circular arc surface 110 , the heat conduction core 100 is formed to protrude upward along the center of the circular arc surface 110 , and the heat sink 10 , the circular arc surface 110 and the heat conduction core 100 are integrally formed. The circular arc surface 110 is inclined from the center of the upper end to the edge of the lower end, which can reflect the light emitted by the LED light source, which is beneficial to improve the light efficiency.

The heat sink 10 and the heat conduction core 100 are both made of high thermal conductivity copper, copper alloy, aluminum or aluminum alloy, the flexible circuit board 20 is pasted on the outer surface of the heat conduction core 100, the flexible circuit board 20 is in full contact with the heat conduction core 100, heat conduction The core 100 can quickly conduct the heat generated by the LED light source to the heat sink 10, and the heat sink 10 quickly dissipates the heat into the air. The flexible circuit board 20 is pasted and fixed on the side wall of the heat conduction core 100 by a thermally conductive adhesive, which can accelerate the heat conduction speed between the flexible circuit board 20 and the heat conduction core 100; Several cooling holes 103, the cooling holes 103 communicate with the hollow position at the lower end of the cooling seat 10, so that the internal air of the cooling seat 10 can circulate with the external air to realize heat exchange, thereby improving the heat dissipation effect; There are a number of annular heat dissipation ribs 102, which can increase the contact area between the heat dissipation seat 10 and the air and improve the heat dissipation speed; the above design can greatly improve the heat dissipation capacity of the heat dissipation body 2, thereby controlling the temperature of the LED light source to the greatest extent and achieving delay The purpose of light decay and prolonging the service life of LED light source.

As shown in Figures 7 to 9, the heat conduction core 100 can also be set as a cone, and the flexible circuit board 20 is folded around the side wall of the heat conduction core 100 and pasted on the side wall surface of the heat conduction core 100; in order to make the LED bulb 360° evenly To emit light, the wire core is arranged at the center of the upper end surface of the heat sink 10, and the heat conduction core 100 is arranged in a conical shape or a regular pyramid shape.

In addition, the heat conduction core 100 can also be configured as an arcuate body, a "U" shape or an arch bridge shape, and the flexible circuit board 20 is pasted on the surface of the heat conduction core.

In addition, as shown in FIG. 6 , the heat conduction core 100 and the heat sink 10 can be arranged separately, and a socket 111 adapted to the lower end of the heat conduction core 100 is provided at the central position of the circular arc surface 110 of the heat sink 10 . The inner wall surface of the socket 111 and the outer wall surface of the lower end of the heat conduction core 100 are provided with matching threads, and the heat conduction core 100 and the heat sink 10 are fixed by threaded connection.

The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields, are all The same reasoning is included in the patent protection scope of the present invention.

Claims (10)

1. LED bulb, comprise the lamp holder, radiator and the lampshade that connect successively, described radiator comprises radiating seat and is connected to the heat conduction core of described radiating seat upper end, in described heat conduction core led light source is installed, it is characterized in that, described led light source by flexible PCB and the some led chips that evenly are installed on the described flexible PCB form, described flexible PCB forms the shape adaptive with described heat conduction core around described heat conduction core convolution, and the back side of described flexible PCB and the surface of described heat conduction core are fitted fixing; End at described flexible PCB is provided with electrode contact, and described electrode contact is covered by the other end of described flexible PCB; Be provided with wire guide at described heat conduction core sidewall, with the wire of described electrode contact electrical connection from described wire guide by being connected with the LED driving power.

2. LED bulb according to claim 1 is characterized in that, described flexible PCB is pasted and fixed on the sidewall of described heat conduction core by the heat conduction adhesive.

3. LED bulb according to claim 1 and 2 is characterized in that, described flexible PCB comprises that the electricity that is arranged on described flexible PCB one end meets section, and described electrode contact is arranged on described electricity and connects in the section, and described wire guide is arranged on the periphery that described electricity meets section.

4. LED bulb according to claim 1, it is characterized in that, described heat conduction core is cylinder or stage body, described flexible PCB comprise behind the convolution with the adaptive side circuit board of the sidewall shape of described heat conduction core and convolution after the end face circuit board adaptive with the top end face of described heat conduction core.

5. LED bulb according to claim 4 is characterized in that, described heat conduction core is cylindrical, vertical prismatic shape, truncated cone-shaped or positive terrace with edge shape.

6. LED bulb according to claim 1 is characterized in that, described heat conduction core is cone, and described flexible PCB is around the sidewall convolution of described heat conduction core.

7. LED bulb according to claim 6 is characterized in that, described heat conduction core is taper shape or orthopyramid shape.

8. LED bulb according to claim 1 is characterized in that, described heat conduction core is contour body, " U " body or arch bridge shape.

9. LED bulb according to claim 1 is characterized in that, described radiating seat and described heat conduction core are copper, copper alloy, the aluminum or aluminum alloy of high heat conduction and make, and evenly is provided with some vent ribs on the outside wall surface of described radiating seat; Described heat conduction core is arranged on the upper end middle position of described radiating seat, and described heat conduction core and described radiating seat are one-body molded or be threaded connection fixing.

10. each described LED bulb according to claim 1 or in 9, it is characterized in that, described lamp holder is threaded connection the lower end that is fixed on described radiating seat, and described LED driving power is connected with described lamp holder, and described LED driving power is installed in the junction of described lamp holder and described radiating seat.

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