Intensive LED lamp

Abstract

The utility model provides an intensive LED lamp. The intensive LED lamp comprises a shell, a PCB, LED lamp beads and an ejector pin welding column. The LED lamp beads are fixed to the PCB, and the distance between every two adjacent LED lamp beads is smaller than 2 mm. Welding holes are formed in the PCB, the welding holes are through holes, the diameter of each welding hole is smaller than 2.5 mm, and the welding holes are formed among the LED lamp beads; the ejector pin welding column comprises a column body and an ejector pin extending to one side of the column body, and a threaded hole is formed in the side, away from the ejector pin, of the column body. The ejector pins are inserted into the welding holes from the side, where the LED lamp beads are not installed, of the PCB and are welded in the welding holes. Through holes are formed in the shell, the positions of the through holes correspond to the positions of the welding holes, and screws penetrate into the through holes from the outside and are screwed into the threaded holes, so that fastening between the PCB and the shell is achieved. According to the scheme, the supporting force and the fastening force are effectively improved for the PCB, the lamp panel is locked on the flat shell, the flatness of the lamp panel is improved, and the uniformity of the brightness of a light source is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of lamp board design, and particularly relates to a dense LED lamp. Background Art

[0002] In the field of visual inspection, light sources are usually required for lighting. The flatness of the light source PCB board is directly related to the uniformity of the brightness of the light source. Therefore, in a high-precision inspection environment, there are high requirements for the flatness of the light source. For large-sized light sources, due to the large size of the lamp board, the PCB board after welding will have a large deformation. At this time, if only relying on the fixation at the edge of the PCB board, the flatness of the lamp board cannot be guaranteed. Therefore, welding studs need to be added in the middle area of the PCB board. By using the locking force of the welding studs, the PCB lamp board can be fixed and flattened.

[0003] Currently, common welding fastening studs usually include round thimble welding posts ( Figure 1a ), welding terminals ( Figure 1c ), or SMT patch nuts ( Figure 1b ). Among them, welding terminals and SMT patch nuts are usually arranged on the front side of the PCB board, and welding holes with large openings are required. When there are dense lamp beads (spacing < 2 mm) distributed on the lamp board, the gaps between the lamp beads are not sufficient to open welding holes for accommodating the welding terminals and SMT patch nuts, resulting in the inapplicability of the welding terminals and SMT patch nuts on the lamp board with dense lamp beads. And the welding surface of the common round thimble welding studs on the market is usually unilateral, so the strength is poor, and it only plays a positioning role and cannot achieve a high-strength fastening effect. For a large-sized lamp board, due to the large deformation of the lamp board, the welding studs need to bear a large force. Therefore, the common round thimble welding studs on the market cannot be used for fastening the dense LED lamp board either. Summary of the Invention

[0004] In order to solve the above technical problems, the utility model provides a dense LED lamp. For the welding and fastening of dense lamp beads (spacing very small < 2 mm), by customizing the thimble welding posts, the supporting force and fastening force of the PCB board are effectively improved, the lamp board is locked on a flat shell, the flatness of the lamp board is improved, and the uniformity of the light source brightness is guaranteed.

[0005] The technical solution is as follows:

[0006] A dense LED lamp, comprising: a shell (1), a PCB board (2), LED lamp beads (3), and thimble welding posts (4);

[0007] The LED lamp beads (3) are fixed on the PCB board (2), and the spacing between adjacent LED lamp beads is less than 2 mm;

[0008] The PCB board (2) is provided with welding holes (21), and the welding holes (21) are through holes with a diameter less than 2.5 mm and are arranged between LED lamp beads;

[0009] The thimble welding post (4) includes a column body and a thimble (42) extending on one side of the column body. The column body is provided with a threaded hole (41) on the side away from the thimble (42); the diameter of the thimble (42) is slightly smaller than the diameter of the welding hole (21), and the length is slightly smaller than the thickness of the PCB board (2); the thimble (42) is inserted into the welding hole (21) from the side of the PCB board (2) where the LED lamp beads are not installed and is welded in the welding hole (21);

[0010] The housing (1) is provided with a through hole corresponding to the position of the welding hole (21) for a screw to penetrate from the outside and be screwed into the threaded hole (41) to realize the fastening between the PCB board (2) and the housing (1).

[0011] Preferably, a plurality of welding holes (21) are provided and are evenly distributed on the PCB board (2).

[0012] Preferably, the diameter of the welding hole is 1 mm to 2.5 mm.

[0013] Preferably, the diameter of the thimble (42) = the diameter of the welding hole - d, where d ranges from 0.1 mm to 0.5 mm.

[0014] Preferably, the length of the thimble (42) = the thickness of the PCB board - h, where h ranges from 0.1 mm to 0.5 mm.

[0015] The utility model customizes the thimble welding post for the dense LED lamp (the distance between lamp beads is very small < 2 mm). The PCB board and the housing are firmly connected through the thimble welding post, effectively improving the supporting force and fastening force for the PCB board, locking the lamp board on the flat housing, improving the flatness of the lamp board, and ensuring the uniformity of the light source brightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG. 1 is a schematic diagram of a circular thimble welding post, an SMT patch nut, and a welding terminal;

[0017] Figure 2 is a schematic diagram of the overall structure of the dense LED lamp in the specific embodiment;

[0018] Figure 3 is a schematic diagram of the thimble welding post in the specific embodiment;

[0019] Figure 4 is a schematic cross-sectional view of the connection between the thimble welding post, the PCB board, and the housing in the specific embodiment and a partial enlarged view of position A. DETAILED DESCRIPTION OF THE INVENTION

[0020] The technical solution of the present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] A dense LED lamp, as Figures 2 to 4 shown, includes: a housing 1, a PCB board 2, LED lamp beads 3, and thimble welding posts 4;

[0022] The LED lamp beads 3 are fixed on the PCB board 2, and the distance between adjacent LED lamp beads is less than 2 mm;

[0023] The PCB board 2 is provided with welding holes 21. The welding holes 21 are through holes, the diameter of which is less than 2.5 mm and are arranged between the LED lamp beads;

[0024] The thimble welding post 4 includes a column body and a thimble 42 extending on one side of the column body. The column body is provided with a threaded hole 41 on the side away from the thimble 42; the diameter of the thimble 42 is slightly smaller than the diameter of the welding hole 21, and the length is slightly smaller than the thickness of the PCB board 2; the thimble 42 is inserted into the welding hole 21 from the side of the PCB board 2 where the LED lamp beads are not installed and welded in the welding hole 21;

[0025] The housing 1 is provided with a through hole corresponding to the position of the welding hole 21 for a screw 5 to penetrate from the outside and be screwed into the threaded hole 41 to realize the fastening between the PCB board 2 and the housing 1.

[0026] When the size of the PCB board is large, fastening needs to be performed at multiple positions. There are multiple welding holes 21 evenly distributed on the PCB board 2.

[0027] In order to keep the lamp board beautiful, the size of the welding hole should be small, and the diameter of the welding hole is 1 mm to 2.5 mm.

[0028] As a preferred embodiment, the diameter of the thimble 42 = the diameter of the welding hole - d, where d ranges from 0.1 mm to 0.5 mm. The length of the thimble 42 = the thickness of the PCB board - h, where h ranges from 0.1 mm to 0.5 mm.

[0029] The foregoing description of the specific exemplary embodiments of the present detection system has been presented for purposes of illustration and description. The foregoing description is not intended to be exhaustive nor to limit the present detection system to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teachings.

Claims

1. A dense LED lamp, characterized in that, Comprising: A housing (1), a PCB board (2), LED lamp beads (3), and thimble welding posts (4); The LED lamp beads (3) are fixed on the PCB board (2), and the distance between adjacent LED lamp beads is less than 2 mm; The PCB board (2) is provided with welding holes (21), the welding holes (21) are through holes, and their diameter is less than 2.5 mm and is arranged between the LED lamp beads; The thimble welding post (4) includes a column body and a thimble (42) extending on one side of the column body, and the column body is provided with a threaded hole (41) on the side away from the thimble (42); the diameter of the thimble (42) is slightly smaller than the diameter of the welding hole (21), and the length is slightly smaller than the thickness of the PCB board (2); the thimble (42) is inserted into the welding hole (21) from the side of the PCB board (2) where the LED lamp beads are not installed and is welded in the welding hole (21); The housing (1) is provided with a through hole, and the through hole corresponds to the position of the welding hole (21) for a screw to penetrate from the outside and be screwed into the threaded hole (41) to achieve the fastening between the PCB board (2) and the housing (1).

2. The intensive LED lamp according to claim 1, characterized in that: There are a plurality of the welding holes (21), which are evenly distributed on the PCB board (2).

3. The intensive LED lamp according to claim 1, wherein: The diameter of the welding hole is 1 mm to 2.5 mm.

4. The intensive LED lamp according to claim 1, wherein: The diameter of the thimble (42) = the diameter of the welding hole - d, where d ranges from 0.1 mm to 0.5 mm.

5. The intensive LED lamp according to claim 1, wherein: The length of the thimble (42) = the thickness of the PCB board - h, where h ranges from 0.1 mm to 0.5 mm.

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