Welding-free light source assembly

Abstract

A welding-free light source assembly, comprising a bracket, a light source (1) and a circuit board (2), wherein two metal points (8) are provided on one side of the circuit board (2), and the two metal points (8) are respectively configured to abut against positive and negative electrodes of the light source (1); and a fixing assembly is mounted on a top plate (3). By means of providing the two protruding metal points (8) on the circuit board, the metal points (8) can come into contact with the positive and negative electrodes of the light source (1) to supply power to the light source (1); in addition, in order to ensure tight contact between the light source (1) and the metal points (8), the fixing assembly is arranged on the bracket, and the contact between the circuit board (2) and the light source (1) can be more firm by means of the fixing assembly, thereby reducing the possibility of the metal points (8) being separated from the light source (1), and ensuring a normal power supply function of the light source (1). A welding-free and elastic piece-free power supply mode for the light source can be realized, which has a simple assembly structure, the production efficiency can be effectively improved, the use of elastic pieces is reduced, and production costs can be reduced.

Description

A solderless light source assembly Technical Field

[0001] This invention relates to the field of light source device technology, and in particular to a solderless light source assembly. Background Technology

[0002] In the modern lighting field, COB (Chip On Board) light sources have become a popular choice for LED lighting applications due to their advantages such as high brightness, high energy efficiency, and long lifespan. To accommodate the integrated nature of COB light sources, solderless COB light source brackets have emerged, aiming to simplify the installation process and improve production efficiency. Existing solderless COB light source brackets typically employ a spring-loaded contact power supply scheme. This involves fixing metal springs to the bracket, allowing them to directly contact the positive and negative terminals of the light source, and then connecting them to an external power source via terminals to power the light source.

[0003] For example, the wiring element for LED electrical connections disclosed in patent CN200810184925.0 achieves a solderless design through a spring-loaded structure. Although the solderless COB light source bracket simplifies the installation process to some extent, its design still has several key limitations, as follows:

[0004] Assembly complexity: Existing designs involve multiple independent components, including brackets, springs, and terminals, which not only increases assembly complexity but also raises production costs. In large-scale production environments, this complexity may lead to low production efficiency. Furthermore, the production and assembly of metal springs requires manual intervention, including adjusting the deformation of the metal springs, making fully automated production impossible and resulting in low production and assembly efficiency.

[0005] Number of parts and cost: The presence of multiple independent parts not only increases the difficulty of assembly but also directly leads to higher costs. Additional parts mean more inventory management, higher procurement costs, and more complex logistics arrangements.

[0006] Contact reliability: The installation and fixing of the spring contacts are crucial to ensuring circuit stability. If the spring contacts are not properly fixed, or if they shift over time, it will directly lead to poor contact, affecting the normal operation of the light source, and even causing circuit failure.

[0007] Given the above issues, the existing solderless light source bracket designs still have considerable room for improvement in terms of convenience, stability, and cost-effectiveness.

[0008] Summary of the Invention

[0009] This invention addresses the problems of existing technologies by providing a solderless light source assembly. Without the need for spring contacts, it achieves solderless power supply by ensuring close contact between the metal points on the circuit board and the positive and negative electrodes of the light source. The structure is simple and assembly is more convenient.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a solderless light source assembly, including a bracket, a light source, and a circuit board, wherein the circuit board is mounted on the bracket, the bracket includes a top plate and a bottom plate detachably connected to the top plate, the bottom plate is provided with a light source slot for assembling the light source, and the top plate is provided with a light hole for the light source to leak out; two metal points are provided on one side of the circuit board, the two metal points are respectively used to contact the positive and negative electrodes of the light source to make the light source electrically connected to the circuit board; a fixing component is mounted on the top plate, the fixing component is used to contact the other side of the circuit board.

[0011] Preferably, the metal point is a tin point.

[0012] Preferably, the metal point is a curved surface.

[0013] Preferably, the fixing component includes a plurality of spring clips, one end of which is fixed to the top plate, and the other end of which has a gap with the top plate, and the spring clip abuts against the other side of the circuit board.

[0014] Preferably, one end of the spring clip is integrally connected to the top plate.

[0015] Preferably, the top plate has a plurality of clearance grooves, which are located below the spring clip.

[0016] Preferably, the fixing component includes a plurality of springs, one end of which abuts against the top plate and the other end of which abuts against the other side of the circuit board.

[0017] Preferably, the top plate has a spring groove, and the spring is embedded in the spring groove.

[0018] Preferably, the circuit board is equipped with wiring terminals, the base plate has a terminal slot, and after the circuit board is assembled into the bracket, the wiring terminals are assembled into the terminal slot.

[0019] Preferably, the light source slot has four sidewalls, one of which has an arc-shaped limiting protrusion protruding from it. The bottom plate has a limiting adjustment hole, which is close to the sidewall with the arc-shaped limiting protrusion so that the arc-shaped limiting protrusion can move. The other three sidewalls are each provided with a fastening block. Both the fastening block and the arc-shaped limiting protrusion are used to abut against the light source.

[0020] The beneficial effects of this invention are:

[0021] This invention provides a solderless light source assembly. An additional circuit board is added, and power is supplied to the light source by placing two protruding metal points on the circuit board, which then contact the positive and negative terminals of the light source. To ensure a tight contact between the light source and the metal points, a fixing component is provided in the bracket. This component further secures the circuit board to the light source, reducing the possibility of separation and ensuring normal power supply. This invention achieves a solderless and spring-loaded power supply method for the light source, simplifies the assembly structure, effectively improves production efficiency, and reduces the use of springs, thus reducing production costs. Attached Figure Description

[0022] Figure 1 is an exploded structural diagram of Embodiment 1 of the present invention;

[0023] Figure 2 is a second exploded structural diagram of Embodiment 1 of the present invention;

[0024] Figure 3 is a schematic diagram of the structure of the base plate of the present invention;

[0025] Figure 4 is a cross-sectional view of Embodiment 1 of the present invention;

[0026] Figure 5 is a schematic diagram of the spring clip structure of the present invention;

[0027] Figure 6 is a cross-sectional view of the base plate of the present invention;

[0028] Figure 7 is an exploded structural diagram of Embodiment 2 of the present invention;

[0029] Figure 8 is a cross-sectional view of Embodiment 2 of the present invention.

[0030] The reference numerals in Figures 1 to 8 include:

[0031] 1-Light source, 2-Circuit board, 3-Top plate, 4-Bottom plate, 5-Light source slot, 6-Light hole, 7-Annular slot, 8-Metal point, 9-Spring buckle, 10-Gap, 11-Allowing slot, 12-Spring, 14-Wire terminal, 15-Terminal slot, 16-Side wall, 17-Arc-shaped limiting protrusion, 18-Limit adjustment hole, 19-Fastening block, 20-Positioning protrusion, 21-Mounting post, 22-Mounting slot, 23-Soldering pad. Detailed Implementation

[0032] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0033] Example 1:

[0034] This embodiment provides a solderless light source assembly, as shown in Figures 1 to 6, including a bracket, a light source 1, and a circuit board 2. The circuit board 2 is mounted on the bracket, which includes a top plate 3 and a bottom plate 4 detachably connected to the top plate 3. The bottom plate 4 is provided with a light source slot 5 for mounting the light source 1, and the top plate 3 has a light hole 6 for the light source 1 to pass through. Two metal points 8 are provided on one side of the circuit board 2, and the two metal points 8 are respectively used to contact the positive and negative terminals of the light source 1 to make the light source 1 electrically connected to the circuit board 2. The top plate 3 is equipped with a fixing component, which is used to contact the other side of the circuit board 2.

[0035] Specifically, this embodiment adds a circuit board, such as a printed circuit board. The circuit board 2 has pads corresponding to the power supply positions, and metal points 8 are fixed on these pads, protruding from the circuit board 2, as shown in Figure 2. Electrical connection is achieved by the metal points 8 contacting the positive and negative pads 23 of the light source 1, thus supplying power to the light source 1. The support includes a top plate 3 and a bottom plate 4, as shown in Figures 1 and 2. A space is formed between the top plate 3 and the bottom plate 4 for mounting the light source 1 and the circuit board 2. The bottom plate 4 has a light source slot 5 and an annular groove 7 for positioning the circuit board 2. After fixing the light source 1 in the light source slot 5, the circuit board 2 is also assembled into the annular groove 7. The size of the annular groove 7 is adapted to the circuit board 2, reducing the possibility of circuit board 2 shifting. The metal points 8 of the circuit board 2 contact the positive and negative pads of the light source 1. By assembling the top plate 3 and the bottom plate 4 together, the fixing components of the top plate 3 abut against the circuit board 2, making the contact between the circuit board 2 and the light source 1 more secure and ensuring normal contact between the metal points 8 and the light source 1.

[0036] The material of the metal point 8 can be tin. In the actual production of the circuit board 2, tin is placed on the pads of the output end of the circuit board 2 for power supply. At this time, the tin is square or irregular in shape. Then, the circuit board 2 with tin is reflow soldered to melt the tin. At the same time, under the combination of the properties of the tin itself and the properties of the pads, the tin melts into an arc or spherical shape as shown in Figures 2 and 4, that is, a bump is formed. The shape of this bump is convenient for contact with the pads of the light source 1, and it is not easy for poor contact to occur. On this basis, it is only necessary to ensure that the metal point 8 can make close contact with the pads.

[0037] Therefore, this embodiment further provides a fixing component, as shown in Figures 2 and 4. The fixing component includes a plurality of spring clips 9. One end of the spring clip 9 is fixed to the top plate 3, and a gap 10 is provided between the other end of the spring clip 9 and the top plate 3. The spring clip 9 abuts against the other side of the circuit board 2.

[0038] Specifically, one end of the spring clip 9 is integrally connected to the top plate 3. The bracket structure is generally injection molded from plastic, and the material of the bracket is existing technology. Therefore, since the spring clip 9 is integrally molded on the top plate 3, only the fixture needs to be adjusted during injection molding. The produced top plate 3 comes with the spring clip 9, meaning no other production assembly process is required. In use, the other end of the spring clip 9 abuts against the circuit board 2, applying a force to the circuit board 2 towards the light source 1, i.e., pushing the circuit board 2 towards the light source 1. The light source 1 is fixed to the floor, so the function of the spring clip 9 is to make the contact between the circuit board 2 and the light source 1 tighter. Furthermore, the material of the top plate 3 determines that the spring clip 9 itself has a certain degree of elasticity, so it can apply a certain force to the circuit board 2 with the help of elasticity. Further, in order to increase the elastic movement space of the spring clip 9, the top plate 3 has a corresponding relief groove 11, as shown in Figures 4 and 5. When the spring clip 9 is squeezed by the circuit board 2, it can move into the relief groove 11 according to the actual situation, thereby accommodating more thicknesses of the circuit board 2, and the spring clip 9 is not easy to break, thus not affecting the service life of the spring clip 9. In this embodiment, the more spring clips 9 there are, the tighter the contact between the circuit board 2 and the light source 1. As shown in Figure 2, three spring clips 9 can be set to form a triangular positioning, which can also provide a good and stable pushing force for installation, ensuring normal contact between the circuit board 2 and the light source 1.

[0039] As shown in Figure 1, the circuit board 2 in this embodiment has two terminals 14 soldered on. The structure of the terminals 14 is the prior art. The base plate 4 has a corresponding terminal slot 15. After assembly, the terminals 14 are located in the terminal slot 15. The terminals 14 can limit the circuit board 2 in addition to connecting to the external power supply, preventing the circuit board 2 from rotating. With the spring force of the spring clip 9, the circuit board 2 can be effectively fixed, so that the metal point 8 and the solder pad of the light source 1 are in stable contact.

[0040] As shown in Figure 3, in order to ensure the stable installation of the light source 1, the light source slot 5 in this embodiment is provided with four side walls 16. One of the side walls 16 is provided with an arc-shaped limiting protrusion 17. The base plate 4 is provided with a limiting adjustment hole 18. The limiting adjustment hole 18 is close to the side wall 16 where the arc-shaped limiting protrusion 17 is provided, so that the arc-shaped limiting protrusion 17 can move. The other three side walls 16 are provided with fastening blocks 19. The fastening blocks 19 and the arc-shaped limiting protrusion 17 are used to abut against the light source 1.

[0041] Specifically, the general light source 1 is a COB light source 1. In this embodiment, a square light source 1 is used. The size of the light source slot 5 is adapted to the size of the light source 1. In order to ensure the stable installation of the light source 1, after the light source 1 is assembled into the light source slot 5, three fastening blocks 19 respectively abut against the three sides of the light source 1, and the arc-shaped limiting protrusion 17 abuts against the fourth side of the light source 1. In addition, a limiting adjustment hole 18 is opened at the position of the arc-shaped limiting protrusion 17. Since the base plate 4 is made of a material with a certain elasticity such as plastic, the limiting adjustment hole 18 is set near the position of the arc-shaped limiting protrusion 17 so that the arc-shaped limiting protrusion 17 can have a certain elastic movement space. When installing the light source 1, the position of the arc-shaped limiting protrusion 17 can be finely adjusted according to the size of the light source 1 to ensure that it can abut against the light source 1, thereby fixing the light source 1.

[0042] Additionally, as shown in Figure 3, the bottom plate 4 in this embodiment has a positioning protrusion 20 on its edge, and the top plate 3 has a positioning groove (not shown in the figure) for assembling the positioning protrusion 20 on its edge. During assembly, the positioning of the bottom plate 4 and the top plate 3 can be achieved through the positioning protrusion 20 and the positioning groove. Furthermore, the bottom plate 4 is equipped with a mounting post 21, and the top plate 3 has a mounting groove 22. After assembly, the mounting post 21 is limited in the mounting groove 22, and the assembly can be fixed by screws or other existing technologies. This embodiment does not impose any limitations.

[0043] Existing technologies for COB light source installation and power supply, referencing the COB bracket disclosed in patent CN201620634420.X, involve mounting the COB light source onto the bracket and then setting metal springs. The metal springs deform to contact the positive and negative electrodes of the COB light source, thus supplying power. The metal springs deform under external force and return to their original shape when the force is removed. This characteristic allows the springs to maintain close contact with the light source pads even when compressed. Therefore, existing technologies utilize many metal springs in COB light source brackets. However, this structure requires the installation of metal springs, necessitating dedicated slots on the bracket for this purpose. Stable power supply requires proper installation and fixation of the springs. The small size of the springs leads to inefficiency in production and installation, and they are prone to loss and oxidation over time. Furthermore, the production and assembly of the springs require manual intervention, making fully automated production difficult with this spring-based structure.

[0044] In this embodiment, the circuit board is added, eliminating the need for spring contacts and the need for power supply through spring deformation. Power supply is achieved through the contact between the metal point 8 and the positive and negative electrodes of the light source. This means that the contact method used in this embodiment is a hard contact, and the metal point 8 will not deform. Therefore, during actual assembly, there is no need to control the degree of deformation or worry about poor contact caused by changes in deformation over time. With the assistance of the fixing components, the metal point 8 can maintain contact with the positive and negative electrodes of the light source. In addition, since the metal point 8 is a point and the positive and negative electrode pads of the light source are surfaces, the contact between the point and the surface has a certain contact area. This means that even if the metal point 8 shifts to a certain extent, it will not affect the contact between the metal point 8 and the pads, thus ensuring the stability of the contact. The circuit board is larger than the spring contact, making it easier to install. In actual production, the components on the circuit board can be automatically assembled using a pick-and-place machine. The circuit board assembly method is simpler and can be assembled into electronic products using automated equipment. In other words, this embodiment can achieve fully automated production, which helps to improve production efficiency and quality. Power supply can be achieved simply by making the metal point 8 of the circuit board contact with the positive and negative terminals of the light source. The circuit board is then fixed and secured by the fixing components set on the housing to ensure the stability of the power supply. The application of the circuit board in COB light source lamps can effectively improve production efficiency, enable long-term use, and provide a more stable power supply.

[0045] In this embodiment, a circuit board is added. Through the stable installation of light source 1, the stable installation of circuit board 2, and the cooperative installation between light source 1 and circuit board 2, a solderless and spring-loaded assembly structure is achieved. Specifically, the light source groove 5 and the annular groove 7 are used to limit the installation of light source 1 and circuit board 2, as shown in Figure 4. Then, the spring clip 9 provides a force in the y-direction of Figure 4, i.e., towards light source 1, to the circuit board 2, making the connection between circuit board 2 and light source 1 more stable. In addition, combined with the installation of terminal 14, the rotation of circuit board 2 in the x-direction of Figure 4 is restricted, thereby effectively fixing circuit board 2 and ensuring the stability of the assembly between circuit board 2 and light source 1. This achieves a solderless and spring-loaded structure design, and the assembly process is simpler. It saves the use of spring clips, reduces production costs, and is more practical.

[0046] Example 2:

[0047] As shown in Figures 7 and 8, the fixing component of this embodiment includes several springs 12. One end of each spring 12 abuts against the top plate 3, and the other end abuts against the circuit board 2, applying a force in the y-direction to the circuit board 2 to ensure stable contact between the circuit board 2 and the light source 1. The springs 12 can be installed by creating several spring slots in the top plate 3 and embedding the springs 12 into these slots, ensuring that the springs 12 protrude and abut against the circuit board 2. Alternatively, other methods can be used to limit the installation of the springs 12; this embodiment does not impose any limitations.

[0048] Example 3:

[0049] In this embodiment, the circuit board can also be applied to other electronic products. The circuit board 2 includes a substrate and metal dots 8 disposed on the substrate. The metal dots 8 are used to contact external structures to achieve electrical connection. The surface of the metal dots 8 is curved.

[0050] During production, the corresponding amount of solder is first placed on the corresponding position on the substrate. Then, the circuit board with solder is reflow soldered. During the reflow soldering process, the solder melts, and based on the properties of liquids, it forms an arc-shaped surface on the pads of the circuit board. Therefore, after the reflow soldering is completed, a bump is formed on the pads of the circuit board. The reflow soldering process can ensure the contact between the metal point 8 and the pads of the circuit board, avoiding issues such as cold solder joints and false solder joints. The production process is highly automated and can improve production efficiency.

[0051] Furthermore, the axial cross-section of the metal point 8 is similar to a hemispherical shape, and the surface of the metal point 8 is coated with a coating, namely an anti-oxidation coating (not shown in the attached figure), which can prevent poor contact caused by oxidation of the surface of the metal point 8.

[0052] As shown in Figures 4 and 8, the two metal points 8 are mainly used for power supply, and are therefore set as positive and negative poles. Preferably, the two metal points 8 are located on the same side of the circuit board. After this embodiment is installed in the electronic device, it can be pressed against the other side of the circuit board by the fixing component 24 provided on the electronic device, so that the metal points 8 are in stable contact with the positive and negative poles of the structure 1 to be powered by the electronic device, thereby achieving the purpose of power supply. Of course, the metal points 8 can also contact the external electronic device to transmit other electronic signals, and this embodiment does not impose any restrictions.

[0053] The contact method used in this embodiment is a hard contact, and the metal point 8 will not deform. Therefore, during actual assembly, there is no need to control the degree of deformation, nor is there any need to worry about poor contact caused by changes in deformation over time. With the assistance of the fixing components, the metal point 8 can maintain contact with the positive and negative electrodes of the light source. In addition, the metal point 8 is a point, and the positive and negative electrode pads of the light source are surfaces. The contact between the point and the surface has a certain contact area. That is, even if the metal point 8 is displaced to a certain extent, it will not affect the contact between the metal point 8 and the pads, thus ensuring the stability of the contact.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present invention without departing from the scope of the present invention are within the scope of the present invention.

Claims

1. A solderless light source assembly, characterized in that: The device includes a bracket, a light source, and a circuit board, both of which are mounted on the bracket. Two metal points are provided on one side of the circuit board, which are used to contact the positive and negative terminals of the light source to make the light source electrically connected to the circuit board. The bracket is equipped with a fixing component that is used to contact the other side of the circuit board. The metal points are solder points, and the surfaces of the metal points are curved.

2. The solderless light source assembly according to claim 1, characterized in that: The metal point is hemispherical in shape.

3. The solderless light source assembly according to claim 1, characterized in that: The bracket includes a top plate and a base plate detachably connected to the top plate. The fixing component includes a plurality of spring clips. One end of each spring clip is fixed to the top plate, and a gap is provided between the other end of the spring clip and the top plate. The spring clip abuts against the other side of the circuit board.

4. The solderless light source assembly according to claim 3, characterized in that: One end of the snap fastener is integrally connected to the top plate.

5. The solderless light source assembly according to claim 3, characterized in that: The top plate has several clearance slots, which are located below the spring clip.

6. The solderless light source assembly according to claim 1, characterized in that: The fixing component includes several springs, one end of which abuts against the bracket, and the other end of which abuts against the other side of the circuit board.

7. The solderless light source assembly according to claim 6, characterized in that: The bracket has a spring groove, and the spring is embedded in the spring groove.

8. The solderless light source assembly according to claim 1, characterized in that: The circuit board is equipped with wiring terminals, the base plate has a terminal slot, and after the circuit board is assembled into the bracket, the wiring terminals are assembled into the terminal slot.

9. The solderless light source assembly according to claim 1, characterized in that: The base plate is provided with a light source slot for assembling a light source, and the top plate is provided with a light hole for the light source to leak out. The light source slot is provided with four side walls, one of which is provided with an arc-shaped limiting protrusion. The base plate is provided with a limiting adjustment hole, which is close to the side wall where the arc-shaped limiting protrusion is provided so that the arc-shaped limiting protrusion can move. The other three side walls are provided with fastening blocks. The fastening blocks and the arc-shaped limiting protrusion are used to abut against the light source.

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