LED circuit board and LED lighting device

Abstract

The utility model discloses an LED circuit board and an LED lighting device, and belongs to the technical field of lighting. The LED circuit board comprises a circuit board body, LED lamp beads electrically connected with the circuit board body, a first positive electrode end, a first negative electrode end, a second positive electrode end and a second negative electrode end, the first positive electrode end and the first negative electrode end are arranged on the circuit board body, the second positive electrode end and the second negative electrode end are arranged on the LED lamp beads, and a connecting piece is installed between the circuit board body and the LED lamp beads. Solder paste can be injected into the inner side of the solder paste storage cavity through the filling port by using a tool until a small amount of the solder paste overflows out of the filling port, and then the solder paste is heated by using the hot air gun, so that the solder paste is melted and connected with the first positive electrode end and the second negative electrode end as well as the first negative electrode end and the second positive electrode end, the amount of the solder paste can be controlled, and waste of the solder paste is reduced; and the element connection is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting, and more specifically to an LED circuit board and an LED lighting device. Background Art

[0002] At present, due to the advantages of SMD LEDs such as small size and long service life, and easy automated production, SMD LED light-emitting components have gradually replaced traditional lighting devices, and SMD LED light strings are also commonly used as decorations. Most of the existing SMD LED lights are inserted on circuit boards. Due to the small size of some circuit boards, the assembly efficiency is generally poor, whether it is done manually or by equipment, and the circuit board structure is easily damaged, which results in high production costs and low efficiency.

[0003] The existing patent is a new type of SMD LED lamp, the patent authorization number is CN 220186744 U. The battery is directly installed on the circuit board through a hardware buckle. The side legs of the hardware buckle are fixed to the corresponding pins of the circuit board through solder paste. There is no need to insert it into the circuit. Automated equipment can be used for installation to improve production efficiency.

[0004] However, in the patent authorization number CN 220186744 U, during the installation of the lamp beads, the solder paste is directly applied to the junction of the corners and the circuit board. Since the solder paste is directly squeezed manually during the application process, the amount of solder paste extruded cannot be controlled, which can easily lead to too much or too little solder paste. Too much solder paste can easily lead to waste, while too little solder paste can easily lead to unstable connection. Therefore, we propose an LED circuit board and an LED lighting device to solve the above-mentioned problems. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide an LED circuit board and an LED lighting device, which can use a tool to inject solder paste into the inner side of the solder paste storage cavity through a filling port until a small amount of solder paste overflows from the filling port, and then use a hot air gun to heat the solder paste to melt the solder paste to connect the first positive terminal and the second negative terminal and the first negative terminal and the second positive terminal, so as to control the amount of solder paste, reduce the waste of solder paste, and make the component connection stable.

[0007] 2. Technical solution

[0008] To solve the above problems, the utility model adopts the following technical solutions.

[0009] An LED circuit board comprises a circuit board body, an LED lamp bead electrically connected to the circuit board body, a first positive terminal and a first negative terminal arranged at the circuit board body, and a second positive terminal and a second negative terminal arranged at the LED lamp bead, wherein a connector is installed between the circuit board body and the LED lamp bead;

[0010] Both ends of the connector are provided with filling ports, the inner side of the connector is symmetrically provided with solder paste storage cavities conductively connected to the filling ports, a partition integrally formed with the connector is provided between the symmetrically provided solder paste storage cavities, the top of the connector is symmetrically provided with a first connecting port conductively connected to the solder paste storage cavity, and the bottom of the connector is symmetrically provided with a second connecting port conductively connected to the solder paste storage cavity.

[0011] Furthermore, heat dissipation fins are installed on the outer walls of both sides of the connecting piece, and the heat dissipation fins are made of copper material;

[0012] Both ends of the heat dissipation fin are provided with assembly holes, and the connecting piece and the corresponding parts of the assembly holes are provided with screw holes.

[0013] Furthermore, thermal conductive silicone grease is coated between the heat dissipation fins and the connecting piece.

[0014] Furthermore, a first connection port symmetrically arranged on the top of the connection member is respectively combined with the second positive terminal and the second negative terminal.

[0015] Furthermore, the second connection ports at the bottom of the symmetrically arranged connection members are respectively combined with the first positive terminal and the first negative terminal.

[0016] Furthermore, the connecting piece is made of copper-aluminum alloy.

[0017] The utility model also provides an LED lighting device;

[0018] The circuit board body is fixedly connected to the connecting piece, and the connecting piece is fixedly connected to the LED lamp bead.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] (1) In this solution, the second connection port provided at the bottom of the connector is abutted against the first positive terminal and the first negative terminal provided at the circuit board body, and then the second positive terminal and the second negative terminal at the LED lamp bead are abutted against the first connection port provided at the top of the connector. A tool is used to inject solder paste into the inner side of the solder paste storage cavity through the filling port until a small amount of solder paste overflows from the filling port. Then, a hot air gun is used to heat the solder paste so that the solder paste melts and connects the first positive terminal and the second negative terminal and the first negative terminal and the second positive terminal. This can control the amount of solder paste, reduce the waste of solder paste, and make the component connection stable.

[0022] (2) This solution uses thermal conductive silicone grease to fill the gap between the heat sink and the connector, which is beneficial to the heat transfer and can effectively speed up the heat exchange efficiency between the connector and the surroundings, thus avoiding damage to the circuit board due to excessive temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 It is a schematic diagram of the disassembly of the utility model;

[0025] Figure 3 This is a schematic diagram of the LED lamp bead structure of the utility model;

[0026] Figure 4 It is a side view schematic diagram of the connecting piece of the utility model;

[0027] Figure 5 It is a schematic cross-sectional view of the AA portion of the connector of the present invention.

[0028] Description of the numbers in the figure:

[0029] 1. Circuit board body; 2. First positive terminal; 3. First negative terminal; 4. LED lamp bead; 5. Second positive terminal; 6. Second negative terminal; 7. Connector; 8. Filling port; 9. Solder paste storage chamber; 10. Partition; 11. First connection port; 12. Second connection port; 13. Heat sink fin. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0031] Example:

[0032] See also Figure 1-5 , an LED circuit board, comprising a circuit board body 1, an LED lamp bead 4 electrically connected to the circuit board body 1, a first positive terminal 2 and a first negative terminal 3 arranged at the circuit board body 1, and a second positive terminal 5 and a second negative terminal 6 arranged at the LED lamp bead 4, and a connector 7 is installed between the circuit board body 1 and the LED lamp bead 4;

[0033] Both ends of the connector 7 are provided with filling ports 8, the inner side of the connector 7 is symmetrically provided with solder paste storage chambers 9 which are conductively connected to the filling ports 8, a partition 10 which is integrally formed with the connector 7 is provided between the symmetrically provided solder paste storage chambers 9, the top of the connector 7 is symmetrically provided with first connection ports 11 which are conductively connected to the solder paste storage chambers 9, and the bottom of the connector 7 is symmetrically provided with second connection ports 12 which are conductively connected to the solder paste storage chambers 9;

[0034] It should be noted that, first, the second connecting port 12 set at the bottom of the connecting member 7 is abutted against the first positive terminal 2 and the first negative terminal 3 set at the circuit board body 1, and then the second positive terminal 5 and the second negative terminal 6 at the LED lamp bead 4 are abutted against the first connecting port 11 set at the top of the connecting member 7, and the first positive terminal 2 and the second negative terminal 6 and the first negative terminal 3 and the second positive terminal 5 are made to correspond to each other, and the solder paste is injected into the inner side of the solder paste storage cavity 9 through the filling port 8 using a tool until a small amount of solder paste overflows from the filling port 8, and then the solder paste is heated using a hot air gun to melt the solder paste to connect the first positive terminal 2 and the second negative terminal 6 and the first negative terminal 3 and the second positive terminal 5, so that the amount of solder paste can be controlled, the waste of solder paste can be reduced, and the component connection can be stable.

[0035] like Figure 1 , Figure 2 As shown, heat sinks 13 are installed on both sides of the outer wall of the connector 7, and the heat sink fins 13 are made of copper material. Both ends of the heat sink fins 13 are provided with assembly holes, and screw holes are provided at the connector 7 corresponding to the assembly holes.

[0036] Thermal conductive silicone grease is coated between the heat dissipation fins 13 and the connector 7;

[0037] The connecting piece 7 is made of copper-aluminum alloy.

[0038] It should be noted that by filling the gap between the heat sink fins 13 and the connector 7 with thermal grease, heat transfer is facilitated, and the heat exchange efficiency between the connector 7 and the surroundings can be effectively accelerated, thereby preventing the circuit board body 1 from being damaged due to excessive temperature.

[0039] like Figure 2 , Figure 3 , Figure 5As shown, the first connection port 11 symmetrically arranged at the top of the connection member 7 is respectively combined with the second positive terminal 5 and the second negative terminal 6, and the second connection port 12 symmetrically arranged at the bottom of the connection member 7 is respectively combined with the first positive terminal 2 and the first negative terminal 3;

[0040] It should be noted that the solder paste is then heated with a hot air gun to melt the solder paste to connect the first positive terminal 2 and the second negative terminal 6 and the first negative terminal 3 and the second positive terminal 5 .

[0041] An LED lighting device;

[0042] The circuit board body 1 is fixedly connected to the connecting piece 7 , and the connecting piece 7 is fixedly connected to the LED lamp bead 4 .

[0043] When in use: first, connect the second connecting port 12 set at the bottom of the connecting piece 7 with the first positive terminal 2 and the first negative terminal 3 set at the circuit board body 1, and then connect the second positive terminal 5 and the second negative terminal 6 at the LED lamp bead 4 with the first connecting port 11 set at the top of the connecting piece 7, and make the first positive terminal 2 and the second negative terminal 6 and the first negative terminal 3 and the second positive terminal 5 correspond to each other, use a tool to inject the solder paste into the inner side of the solder paste storage cavity 9 through the filling port 8 until a small amount of solder paste overflows from the filling port 8, and then use a hot air gun to heat the solder paste so that the solder paste melts and connects the first positive terminal 2 and the second negative terminal 6 and the first negative terminal 3 and the second positive terminal 5.

[0044] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. An LED circuit board, comprising a circuit board body (1), an LED lamp bead (4) electrically connected to the circuit board body (1), a first positive terminal (2) and a first negative terminal (3) arranged at the circuit board body (1), and a second positive terminal (5) and a second negative terminal (6) arranged at the LED lamp bead (4), Features: A connecting piece (7) is installed between the circuit board body (1) and the LED lamp bead (4); Both ends of the connecting member (7) are provided with filling ports (8); a solder paste storage cavity (9) conductively connected to the filling port (8) is symmetrically arranged on the inner side of the connecting member (7); a partition (10) integrally formed with the connecting member (7) is arranged between the symmetrically arranged solder paste storage cavities (9); a first connecting port (11) conductively connected to the solder paste storage cavity (9) is symmetrically arranged on the top of the connecting member (7); and a second connecting port (12) conductively connected to the solder paste storage cavity (9) is symmetrically arranged on the bottom of the connecting member (7).

2. The LED circuit board according to claim 1, Features: Both side outer walls of the connecting member (7) are provided with heat dissipation fins (13), and the heat dissipation fins (13) are made of copper material; Both ends of the heat dissipation fin (13) are provided with assembly holes, and the connection piece (7) is provided with screw holes at positions corresponding to the assembly holes.

3. The LED circuit board according to claim 2, Features: Thermal conductive silicone grease is coated between the heat dissipation fins (13) and the connecting piece (7).

4. The LED circuit board according to claim 1, Features: A first connection port (11) symmetrically arranged on the top of the connection member (7) is respectively connected to the second positive terminal (5) and the second negative terminal (6).

5. The LED circuit board according to claim 1, Features: The second connection ports (12) at the bottom of the symmetrically arranged connection member (7) are respectively connected to the first positive terminal (2) and the first negative terminal (3).

6. The LED circuit board according to claim 1, Features: The connecting piece (7) is made of copper-aluminum alloy.

7. An LED lighting device, It is characterized in that The LED lighting device comprises the LED circuit board according to any one of claims 1 to 6; The circuit board body (1) is fixedly connected to the connecting piece (7), and the connecting piece (7) is fixedly connected to the LED lamp bead (4).

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