Multi-layer PCB circuit board structure of LED lights

Abstract

This utility model relates to the field of LED lighting technology, specifically to a multi-layer PCB circuit board structure for LED lights. It includes a multi-layer PCB circuit board body, a frame-shaped upper pressure plate at the top outer edge of the multi-layer PCB circuit board body, and a frame-shaped lower pressure plate at the bottom outer edge of the multi-layer PCB circuit board body. The multi-layer PCB circuit board body, the frame-shaped upper pressure plate, and the frame-shaped lower pressure plate are fixed together by four locking members. Each locking member includes a cylinder, with a lower abutment block at the bottom of the outer wall of the cylinder that abuts against the bottom of the frame-shaped lower pressure plate, and a threaded post threaded to the top of the cylinder. The top of the outer wall of the threaded post has an upper abutment block that abuts against the top of the frame-shaped upper pressure plate. This multi-layer PCB circuit board structure for LED lights effectively prevents separation of the circuit board structure layers by coordinating the edge of the multi-layer PCB circuit board body with the frame-shaped upper and lower pressure plates, combined with the through-type fixing design of the locking members. Simultaneously, the insertion and engagement of the positioning block and the U-shaped mating block enhances lateral bending resistance.

Description

Technical Field

[0001] This utility model relates to the field of LED lighting technology, specifically to the multi-layer PCB circuit board structure of LED lights. Background Technology

[0002] LED lights, as a highly efficient, energy-saving, and environmentally friendly modern light source, are widely used in commercial lighting, home lighting, and displays due to their advantages such as long lifespan, low power consumption, fast response, small size, and zero pollution. With the continuous development of LED lighting technology, its application scenarios are gradually expanding towards high power and high brightness. However, high-power LED lights generate a large amount of heat during operation, and their driving circuits place increasingly higher demands on the stability and integration of the circuit board. In meeting these requirements, multilayer PCB circuit boards, due to their excellent electrical performance, high-density circuit distribution, stable mechanical structure, and excellent heat dissipation capabilities, have become one of the core carriers of LED light circuit structures. However, existing multilayer PCB circuit board structures still have some shortcomings, such as insufficient heat dissipation and insufficient mechanical strength, requiring further design optimization to improve performance.

[0003] Utility model patent CN219780489U discloses a multilayer PCB circuit board structure, including a circuit board body. Positioning holes are provided inside the four corners of the circuit board body. A first limiting pressure plate is provided on the inner side of one positioning hole via a connecting cylinder, and a second limiting pressure plate is provided on the inner side of the other positioning hole via a connecting post. The connecting post is threadedly connected to the connecting cylinder. Mounting holes are provided in the center of the first limiting pressure plate, the connecting cylinder, the connecting post, and the second limiting pressure plate. A positioning frame is engaged between the two first limiting pressure plates. A heat sink is provided in the center of the positioning frame, and a wind-cooling mechanism is provided on one side of the heat sink. This utility model, through the first and second limiting pressure plates on both sides of the positioning holes at the four corners of the circuit board body, enables the outer side of the multilayer PCB circuit board to be limited, thereby improving the strength of the connection structure between the multilayer PCB circuit boards, preventing the outer layer of the circuit board from falling off, and increasing its service life.

[0004] The aforementioned existing technology enhances the strength of the connection structure between multilayer PCB circuit boards by adding a first limiting plate and a second limiting plate at the four corners of the multilayer PCB circuit board, thereby preventing the outer layers of the circuit board from detaching and being damaged to some extent. However, this four-point fixing method for improving strength still has limitations, especially when the sides of the multilayer PCB circuit board are bent or subjected to external impact, deformation or even interlayer separation may still occur. Therefore, we propose a multilayer PCB circuit board structure for LED lights, which improves the mechanical strength of the multilayer PCB circuit board through an innovative mechanical limiting design. Utility Model Content

[0005] The purpose of this invention is to provide a multilayer PCB circuit board structure for LED lights to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: The multi-layer PCB circuit board structure of LED lights includes a multi-layer PCB circuit board body, which serves as the core circuit carrier of the LED light and is used to integrate the driving circuit and install LED chips. Its conductive line layer is composed of at least three layers of copper foil, including the bottom LED chip mounting layer, the middle signal layer and the top power layer. The layers are electrically connected through metallized vias. An insulating dielectric layer is filled between adjacent structural layers of the conductive line layer. An electromagnetic shielding layer is provided between the bottom layer and the middle layer. The above is the existing technology of multi-layer PCB circuit boards, which will not be elaborated further here. The multilayer PCB circuit board body has connection holes at the top and near the four corners. The outer edge of the top of the multilayer PCB circuit board body has a frame-shaped upper pressure plate. The top of the frame-shaped upper pressure plate has a mounting hole a communicating with the connection holes. The outer edge of the bottom of the multilayer PCB circuit board body has a frame-shaped lower pressure plate. The frame-shaped upper pressure plate and the frame-shaped lower pressure plate work together to press the edge of the multilayer PCB circuit board body to prevent the structural layers from separating. The top of the frame-shaped lower pressure plate has a mounting hole b communicating with the connection holes. The multilayer PCB circuit board body, the frame-shaped upper pressure plate, and the frame-shaped lower pressure plate are fixed together by four locking members, which pass through the connecting holes and press the multilayer structure. The locking members include cylinders. The bottom of the outer wall of the cylinder is provided with a lower abutment block that abuts against the bottom of the frame-shaped lower pressure plate. The top of the cylinder passes through the mounting hole b, the connecting hole, and the mounting hole a in sequence and is threaded with a threaded post. The threaded post is screwed into the threaded groove of the cylinder to press the structure. The top of the outer wall of the threaded post is provided with an upper abutment block that abuts against the top of the frame-shaped upper pressure plate. The bottom of the cylinder has a circular hole a, and the top of the threaded post has a circular hole b that communicates with the circular hole a. The circular holes a and b form a channel for bolts to pass through, which is used to install the multilayer PCB circuit board inside the lamp housing of the LED lamp.

[0007] Preferably, the top of the cylinder has a threaded groove, and the threaded column is threaded into the threaded groove to achieve a locking function.

[0008] Preferably, the frame-shaped upper pressure plate has two first positioning blocks arranged symmetrically on both the front and rear sides to restrict the displacement of the multilayer PCB circuit board body in the front-rear direction. The frame-shaped upper pressure plate has a second positioning block in the middle of both the left and right sides to restrict the displacement of the multilayer PCB circuit board body in the left and right direction. The sides of the first positioning blocks and the second positioning blocks are in contact with the outer side of the multilayer PCB circuit board body.

[0009] Preferably, the frame-shaped lower pressure plate is provided with two first U-shaped docking blocks arranged symmetrically on both the front and rear sides, and the bottom end of the first positioning block is inserted into the first U-shaped docking block to enhance the limiting strength.

[0010] Preferably, a second U-shaped connecting block is provided in the middle of both the left and right sides of the frame-shaped lower pressure plate, and the bottom end of the second positioning block is inserted into the second U-shaped connecting block to improve the lateral bending resistance.

[0011] Preferably, the top of the frame-shaped upper pressure plate is provided with four U-shaped connectors arranged in a matrix for fixing the pins of the heat sink to achieve quick installation. The four U-shaped connectors are connected to the heat sink, and the fan forces the operating temperature of the multi-layer PCB circuit board to be reduced.

[0012] Preferably, the heat sink includes an annular plate that supports the fan and guides the airflow direction. The fan is mounted on the annular plate by bolts to accelerate the heat dissipation of the PCB body. The air outlet of the fan faces the back of the multilayer PCB body, that is, the top of the multilayer PCB body. The bottom of the multilayer PCB body is the mounting surface for the LED beads.

[0013] Preferably, the outer wall of the annular plate is provided with four L-shaped supports. The L-shaped supports have a certain deformation capacity to ensure that the vertical section of the L-shaped supports can be slightly bent so that the pins can be inserted into the U-shaped connector. The bottom of the outer side of the L-shaped supports is provided with pins, which are inserted into the U-shaped connector.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The multi-layer PCB circuit board structure of this LED light uses a frame-shaped upper pressure plate and a frame-shaped lower pressure plate to press the edges of the multi-layer PCB circuit board body together. Combined with the through-type fixing design of the locking component, it effectively avoids the separation of the circuit board structure layers. At the same time, the insertion and cooperation of the positioning plug and the U-shaped docking block enhances the lateral bending resistance and solves the problem of easy deformation under lateral force in the existing four-point fixing method.

[0015] 2. The LED light has a multi-layer PCB circuit board structure with an added heat sink with a fan. Forced air cooling is used to directly dissipate heat from the back of the multi-layer PCB circuit board body, which significantly reduces the heat generated when the LED light is working and avoids circuit performance degradation or component damage caused by excessive temperature.

[0016] 3. The LED light features a multi-layer PCB circuit board structure, with locking components designed with round holes to secure the entire multi-layer PCB structure to the LED light housing; the L-shaped bracket for the heat sink adapts to plug-in installation through deformation capability, simplifying the disassembly and assembly process of the heat sink module and improving maintenance efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall exploded structure of this utility model; Figure 3 This is a partial assembly structure diagram of the present invention; Figure 4 This is a schematic diagram of the locking component structure in this utility model; Figure 5 This is a schematic diagram of the heat dissipation component structure in this utility model; In the diagram: 100, Multilayer PCB circuit board body; 101, Connecting hole; 200, Frame-shaped upper pressure plate; 201, Mounting hole a; 210, First positioning insert; 220, Second positioning insert; 230, U-shaped connector; 300, Frame-shaped lower pressure plate; 301, Mounting hole b; 310, First U-shaped mating block; 320, Second U-shaped mating block; 400, Locking component; 410, Cylindrical component; 411, Threaded groove; 412, Circular hole a; 413, Lower abutment block; 420, Threaded post; 421, Circular hole b; 422, Upper abutment block; 500, Heat sink; 510, Annular plate; 520, L-shaped bracket; 521, Pin; 530, Fan. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Please see Figures 1-5 This utility model provides a technical solution: The multi-layer PCB circuit board structure of LED lamps includes a multi-layer PCB circuit board body 100, which serves as the core circuit carrier of the LED lamp and is used to integrate the driving circuit and install LED chips. Its conductive line layer is composed of at least three layers of copper foil, including the bottom LED chip mounting layer, the middle signal layer and the top power layer. The layers are electrically connected through metallized vias. An insulating dielectric layer is filled between adjacent structural layers of the conductive line layer. An electromagnetic shielding layer is provided between the bottom layer and the middle layer. The above is the existing technology of multi-layer PCB circuit boards, which will not be described in detail here. A connection hole 101 is provided on the top of the multilayer PCB circuit board body 100 and near the four corners. A frame-shaped upper pressure plate 200 is provided on the outer edge of the top of the multilayer PCB circuit board body 100. The top of the frame-shaped upper pressure plate 200 is provided with a mounting hole a201 that communicates with the connection hole 101. A frame-shaped lower pressure plate 300 is provided on the outer edge of the bottom of the multilayer PCB circuit board body 100. The frame-shaped upper pressure plate 200 and the frame-shaped lower pressure plate 300 work together to press the edge of the multilayer PCB circuit board body 100 to prevent the structural layers from separating. The top of the frame-shaped lower pressure plate 300 is provided with a mounting hole b301 that communicates with the connection hole 101. The multilayer PCB circuit board body 100, the frame-shaped upper pressure plate 200, and the frame-shaped lower pressure plate 300 are fixed together by four locking members 400, which pass through the connecting hole 101 and press the multilayer structure. The locking member 400 includes a cylinder 410. The bottom of the outer wall of the cylinder 410 is provided with a lower abutment block 413 that abuts against the bottom of the frame-shaped lower pressure plate 300. The top of the cylinder 410 passes through the mounting hole b301, the connecting hole 101, and the mounting hole a201 in sequence and is threadedly connected to a threaded post. 420, screw into the threaded groove 411 of the cylinder 410 to tighten the structure. The top of the outer wall of the threaded cylinder 420 is provided with an upper abutment block 422 that abuts against the top of the frame-shaped upper pressure plate 200. The bottom of the cylinder 410 is provided with a circular hole a412, and the top of the threaded cylinder 420 is provided with a circular hole b421 that communicates with the circular hole a412. The circular holes a412 and b421 form a channel for the bolt to pass through, which is used to install the multilayer PCB circuit board inside the lamp housing of the LED lamp.

[0021] In this embodiment, a threaded groove 411 is provided at the top of the cylinder 410, and the threaded column 420 is threaded into the threaded groove 411 to achieve a locking function.

[0022] Specifically, the frame-shaped upper pressure plate 200 has two first positioning blocks 210 arranged symmetrically on both the front and rear sides to restrict the displacement of the multilayer PCB circuit board body 100 in the front-rear direction. The frame-shaped upper pressure plate 200 has a second positioning block 220 in the middle of both the left and right sides to restrict the displacement of the multilayer PCB circuit board body 100 in the left and right directions. The sides of the first positioning blocks 210 and the second positioning blocks 220 are in contact with the outer side of the multilayer PCB circuit board body 100.

[0023] Furthermore, two first U-shaped docking blocks 310 are provided on both the front and rear sides of the frame-shaped lower pressure plate 300, which are arranged symmetrically from left to right. The bottom end of the first positioning block 210 is inserted into the first U-shaped docking block 310 to enhance the limiting strength.

[0024] Furthermore, a second U-shaped docking block 320 is provided in the middle of both sides of the frame-shaped lower pressure plate 300, and the bottom end of the second positioning block 220 is inserted into the second U-shaped docking block 320 to improve the lateral bending resistance.

[0025] Furthermore, the top of the frame-shaped upper pressure plate 200 is provided with four U-shaped connectors 230 arranged in a matrix for fixing the pins 521 of the heat sink 500 to achieve quick installation. The four U-shaped connectors 230 are connected to the heat sink 500, and the fan 530 forces the operating temperature of the multilayer PCB circuit board body 100 to be reduced.

[0026] Furthermore, the heat sink 500 includes an annular plate 510, which supports the fan 530 and guides the airflow direction. The fan 530 is mounted on the annular plate 510 by bolts. The fan 530 can start and stop synchronously with the LED lights, or it can start and stop at a timer. It can also be used in conjunction with a temperature sensor and controller to accelerate the heat dissipation of the PCB body. The air outlet of the fan 530 faces the back of the multilayer PCB circuit board body 100, that is, the top of the multilayer PCB circuit board body 100. The bottom of the multilayer PCB circuit board body 100 is the mounting surface of the LED beads.

[0027] Furthermore, the outer wall of the annular plate 510 is provided with four L-shaped brackets 520. The L-shaped brackets 520 have a certain deformation capacity to ensure that the vertical section of the L-shaped brackets 520 can be slightly bent so that the pins 521 can be inserted into the U-shaped connector 230. The bottom of the outer side of the L-shaped brackets 520 is provided with pins 521, which are inserted into the U-shaped connector 230.

[0028] In this embodiment, the multilayer PCB circuit board structure of the LED lamp is used as follows: First, a frame-shaped upper pressure plate 200 is installed on the top outer edge of the multilayer PCB circuit board body 100, and a frame-shaped lower pressure plate 300 is installed on the bottom outer edge, so that the mounting holes a201 of the frame-shaped upper pressure plate 200, the connecting holes 101 of the multilayer PCB circuit board body 100, and the mounting holes b301 of the frame-shaped lower pressure plate 300 are aligned; then, the cylinder 410 of the locking member 400 is inserted into the mounting hole b301 of the frame-shaped lower pressure plate 300, passing through the connecting hole 101 and the mounting hole a201 in sequence, and the threaded post 420 is screwed into the threaded groove 411 at the top of the cylinder 410. By rotating the threaded post 420, the upper abutment block 422 is pressed against the top of the frame-shaped upper pressure plate 200, and the lower abutment block 413 is pressed against the bottom of the frame-shaped lower pressure plate 300. The multilayer PCB circuit board body 100, frame-shaped upper pressure plate 200, and frame-shaped lower pressure plate 300 are pressed together. At this time, the first positioning plug 210 and the second positioning plug 220 of the frame-shaped upper pressure plate 200 are respectively inserted into the first U-shaped docking block 310 and the second U-shaped docking block 320 of the frame-shaped lower pressure plate 300 to complete the lateral limiting. Then, the pin 521 of the heat sink 500 is inserted into the U-shaped connecting seat 230 of the frame-shaped upper pressure plate 200 to achieve fixation. The fan 530 is installed on the annular plate 510 by bolts, so that the air outlet of the fan 530 faces the top of the multilayer PCB circuit board body 100 for forced heat dissipation. Finally, the bolts are passed through the round holes a412 and b421 of the locking member 400 to fix the entire multilayer PCB structure in the LED lamp housing, completing the assembly.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-layer PCB circuit board structure for an LED lamp, comprising a multi-layer PCB circuit board body (100), wherein connection holes (101) are provided on the top of the multi-layer PCB circuit board body (100) and near the four corners, characterized in that: The multilayer PCB circuit board body (100) has a frame-shaped upper pressure plate (200) at the outer edge of its top. The top of the frame-shaped upper pressure plate (200) has a mounting hole a (201) communicating with the connecting hole (101). The multilayer PCB circuit board body (100) has a frame-shaped lower pressure plate (300) at the outer edge of its bottom. The top of the frame-shaped lower pressure plate (300) has a mounting hole b (301) communicating with the connecting hole (101). The multilayer PCB circuit board body (100), the frame-shaped upper pressure plate (200), and the frame-shaped lower pressure plate (300) are fixed together by four locking members (400). 400) includes a cylinder (410), the bottom of the outer wall of the cylinder (410) is provided with a lower abutment block (413) that abuts against the bottom of the frame-shaped lower pressure plate (300), the top of the cylinder (410) passes through the mounting hole b (301), the connecting hole (101) and the mounting hole a (201) in sequence and is threadedly connected to a threaded column (420), the top of the outer wall of the threaded column (420) is provided with an upper abutment block (422) that abuts against the top of the frame-shaped upper pressure plate (200), the bottom of the cylinder (410) is provided with a circular hole a (412), and the top of the threaded column (420) is provided with a circular hole b (421) that communicates with the circular hole a (412).

2. The multilayer PCB circuit board structure of the LED lamp according to claim 1, characterized in that: The top of the cylinder (410) is provided with a threaded groove (411), and the threaded column (420) is threaded into the threaded groove (411).

3. The multilayer PCB circuit board structure of the LED lamp according to claim 1, characterized in that: The frame-shaped upper pressure plate (200) has two first positioning blocks (210) arranged symmetrically on both the front and rear sides. The frame-shaped upper pressure plate (200) has a second positioning block (220) in the middle of both the left and right sides. The sides of the first positioning block (210) and the second positioning block (220) are attached to the outer side of the multilayer PCB circuit board body (100).

4. The multilayer PCB circuit board structure of the LED lamp according to claim 3, characterized in that: The frame-shaped lower pressure plate (300) has two first U-shaped docking blocks (310) arranged symmetrically on both the front and rear sides. The bottom end of the first positioning block (210) is inserted into the first U-shaped docking block (310).

5. The multilayer PCB circuit board structure of the LED lamp according to claim 3, characterized in that: The frame-shaped lower pressure plate (300) is provided with a second U-shaped docking block (320) in the middle of both sides, and the bottom end of the second positioning block (220) is inserted into the second U-shaped docking block (320).

6. The multilayer PCB circuit board structure of the LED lamp according to claim 1, characterized in that: The top of the frame-shaped upper pressure plate (200) is provided with four U-shaped connecting seats (230) arranged in a matrix, and the four U-shaped connecting seats (230) are connected to a heat sink (500).

7. The multilayer PCB circuit board structure of the LED lamp according to claim 6, characterized in that: The heat sink (500) includes an annular plate (510) on which a fan (530) is bolted.

8. The multilayer PCB circuit board structure of the LED lamp according to claim 7, characterized in that: The outer wall of the annular plate (510) is provided with four L-shaped brackets (520), and the bottom of the outer side of the L-shaped brackets (520) is provided with a pin (521), which is inserted into the U-shaped connector (230).

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