A driving power supply

Abstract

This invention provides a driving power supply, belonging to the field of electrical equipment technology. It solves the problem of poor switching stability in existing driving power supplies. This driving power supply includes a housing, a button mounted on the housing and pressable inwards, and a circuit board fixed inside the housing. The surface of the circuit board is arranged along the pressing direction of the button. The circuit board has two electrical contacts, and the inner end of the button has conductive rubber. Both electrical contacts are located on the side circumferential surface of the circuit board, with the conductive rubber opposite to the two electrical contacts. When the button is pressed, the conductive rubber can press against the two electrical contacts along the pressing direction. This driving power supply can improve switching stability and service life.

Description

Technical Field

[0001] This invention belongs to the field of electrical equipment technology and relates to a driving power supply. Background Technology

[0002] A driver power supply is a power converter that transforms the power supply into a specific voltage and current to drive the LED to emit light. Therefore, a circuit board is installed inside the driver power supply, and a button is installed on the driver power supply housing to control the switching of the LED. The button controls the on / off state of the circuit on the circuit board.

[0003] The existing relationship between buttons and circuit boards is exemplified by the color light electrical control box disclosed in patent document (application number: 02227841.9). In this case, the circuit board is fixed inside the housing, and electrical contacts are provided on the side of the circuit board. The conductive rubber button is opposite to the side of the circuit board. Similarly, in the novel LED lamp battery box disclosed in patent document (201320701621.3), the switch button is located on the side of the circuit board, and a waterproof housing is fitted over the switch button. In both of these structures, when the button is pressed, the pressing force is applied to the surface of the circuit board. However, since the circuit board is a thin plastic sheet structure, its support capacity in the direction perpendicular to the surface is poor. If the pressing force is too large, it may cause the circuit board to bend and deform. After long-term use, the circuit board may not return to its original shape, resulting in a bent state, or even loosening or displacement of the circuit board, affecting the stability and service life of the switch.

[0004] Given the poor vertical support of the circuit board, the vertical driver power supply for lamps disclosed in patent document (201510763243.5) adopts another layout, in which the circuit board is vertically fixed in the housing, the switch is located on the side of the end edge of the circuit board, and the sealing element is fitted on the switch. Although this structure can avoid vertical deformation of the circuit board when the switch is pressed, since the switch is also located on the side of the circuit board, the circuit board is still subjected to force on one side when pressed. When the pressing force is large, it is easy to cause the circuit board to tilt to one side. Long-term use will also cause the circuit board to tilt and deform, and even cause the circuit board to loosen or shift.

[0005] Since both of the above methods result in the deformation or loosening of the circuit board, those skilled in the art would naturally think of increasing the structural strength of the circuit board itself to address deformation, such as by using a thicker circuit board model and by supporting the circuit board in the direction of pressure. As for loosening of the circuit board, those skilled in the art would naturally think of increasing the fixing force of the casing on the circuit board, such as by increasing the fixing position and fixing force. However, any of the above methods will lead to the complexity of the internal structure of the casing and increase the cost. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a driving power supply that solves the issues of poor switching control stability and reduced service life of existing driving power supplies.

[0007] The objective of this invention can be achieved through the following technical solution: a driving power supply, comprising a housing, a button disposed on the housing and pressable inward, and a circuit board fixed inside the housing, wherein the surface of the circuit board is arranged along the pressing direction of the button, and two electrical contacts are provided on the circuit board, characterized in that the inner end of the button has conductive rubber, both electrical contacts are located on the side peripheral surface of the circuit board, the conductive rubber is opposite to the two electrical contacts, and when the button is pressed, the conductive rubber can press against the two electrical contacts along the pressing direction.

[0008] The button can be pressed inward, causing the conductive rubber to travel along the pressing direction. This controls the electrical connection and disconnection between two electrical contacts. The circuit board is fixed inside the housing, and its fixing method to the housing can be conventional methods such as welding, snap-fitting, or bonding. However, the circuit board's orientation is consistent with the button's pressing direction, and the conductive rubber at the inner end of the button faces the side circumferential surface of the circuit board. Unlike existing applications where electrical contacts are all located on the circuit board surface, this application sets the electrical contacts on the side circumferential surface of the circuit board, that is, on the outer edge circumferential surface surrounding the circuit board and located between the two side surfaces of the circuit board. The conductive rubber on the circuit board is opposite to the two electrical contacts. When the button is pressed, the conductive rubber presses against the electrical contacts along the pressing direction. Therefore, the pressing force generated on the circuit board is along the direction of the circuit board surface, such as the length or width direction. It will not produce tilting or lateral force perpendicular to the board surface. It makes full use of the high rigidity and strength of the circuit board in the length or width direction, and directly transmits the force to the housing without bending deformation or tilting itself. This ensures the stability of the circuit board, thereby improving the contact stability between the conductive rubber and the electrical contacts, and thus improving the switch stability and service life.

[0009] In the aforementioned driving power supply, the circuit board has a recessed notch along its edge. The side peripheral surface of the circuit board includes an edge end face and a bottom surface of the notch. Both electrical contacts are located on the bottom surface of the notch, allowing the conductive rubber to embed into the notch when the button is pressed. As the force-bearing location, the notch design allows the electrical contacts to penetrate deep into the circuit board. Compared to the edge end face, the circuit board portion at the bottom surface of the notch has higher structural strength, thereby improving the stability of the contact points.

[0010] In the aforementioned driving power supply, the bottom surface of the notch has two protrusions, which are spaced apart along the length of the bottom surface of the notch. The electrical contact includes a conductive plating layer covering the protrusions. The conductive plating layer covers the protrusions, increasing the fixed area between them and preventing the conductive plating layer from falling off under frequent pressing. The conductive rubber is soft, and when pressed, it presses against the conductive plating layer and deforms, allowing the conductive plating layer to embed within the conductive rubber. This creates the effect of conductive rubber covering the conductive plating layer, increasing the contact area between the conductive rubber and the conductive plating layer, thereby improving the contact stability between them.

[0011] In the aforementioned driving power supply, the two side surfaces of the protrusion are coplanar with the two side surfaces of the circuit board, and the height of the conductive plating layer is less than the depth of the notch. The protrusion has a certain width and thickness, and its two side surfaces are coplanar with the two side surfaces of the circuit board, thus giving the protrusion high strength and preventing breakage under pressure. Its height is less than the depth of the notch, and when pressed, the conductive rubber extends into the notch and contacts the conductive plating layer. When the pressing force is too large and causes the conductive rubber to shift to the side, the sidewall of the notch can limit the conductive rubber, preventing it from detaching from the conductive plating layer, improving the contact stability between the two, and thus improving the switching stability.

[0012] In the aforementioned driving power supply, the button is made of an elastic material. The button includes a cylindrical mounting portion and a pressing portion located inside the mounting portion and connected to it. The mounting portion is fixedly connected to the housing. The pressing portion is columnar, with its inner end facing two electrical contacts. The conductive rubber is fixed to the inner end face of the pressing portion. The elastic material button provides a good tactile feel and a good cushioning effect when pressed, preventing hard impacts on the circuit board and improving its stability. The mounting portion is used for fixed installation, and the pressing portion is used for pressing operation and to move the conductive rubber.

[0013] In the aforementioned driving power supply, the housing has a mounting hole, the mounting part is located inside the mounting hole, and the outer peripheral surface of the mounting part is fitted and fixed to the wall of the mounting hole. The outer peripheral surface of the pressing part is connected to the inner peripheral surface of the outer end of the mounting part through an annular elastic diaphragm. The inner peripheral surface of the mounting part has several radially protruding limiting parts circumferentially. Each limiting part has an arc-shaped limiting surface, which is opposite to the pressing part, and there is a gap between the limiting surface and the outer peripheral surface of the pressing part. The mounting part is fitted and fixed to the mounting hole to form a seal. The elastic diaphragm realizes the elastic connection between the mounting part and the pressing part and forms a waterproof seal. The gap between the limiting part and the pressing part reduces interference between the two during pressing, avoids delamination and tearing between the mounting part and the housing due to long-term and frequent pressing of the pressing part, and improves service life. At the same time, the limiting surface on the limiting part can prevent excessive tilting of the pressing part during pressing, ensuring the contact stability between the conductive rubber and the electrical contacts.

[0014] In the aforementioned drive power supply, the inner end of the mounting portion has an annular sealing portion on its outer circumferential surface. A sealing groove is circumferentially formed on the end face of the sealing portion. The inner side of the housing has a sealing protrusion surrounding the mounting hole, and the sealing protrusion is embedded in the sealing groove to form a fixed connection. The sealing protrusion and the sealing groove on the sealing portion form a sealed connection, increasing the sealing shape and enhancing the connection strength between the mounting portion and the housing.

[0015] In the aforementioned driving power supply, a radially arranged limiting groove is formed on the lower end face of the mounting part. The upper edge of the circuit board is embedded in the limiting groove, and the bottom surface of the limiting groove abuts against the edge end face of the circuit board. The inner end face of the conductive rubber is flush with the bottom surface of the limiting groove. The circuit board positions the mounting part to prevent displacement and supports and positions the sealing part and the mounting part, making the button structure more stable and the seal more reliable.

[0016] In the aforementioned driving power supply, the circuit board has a protruding boss along its edge, and the side peripheral surface of the circuit board includes an edge end face and a boss platform, with the electrical contacts located on the boss platform. This structure allows the boss to protrude directly from the edge end face of the circuit board, eliminating the need for an opening in the circuit board design.

[0017] In the aforementioned driving power supply, the side peripheral surface of the circuit board includes a flat edge end face, and the electrical contacts are located on the edge end face. The structure is simple and easier to manufacture.

[0018] In the aforementioned driving power supply, a through hole is provided on the end face of the housing, and a lens is fixed inside the through hole. The inner surface of the lens is an arc-shaped concave surface. An infrared receiver head is fixed on the circuit board, and the infrared receiver head is opposite to the concave surface. External infrared signals pass through the lens and are refracted by the concave surface before being received by the infrared receiver head. The concave surface design can increase the infrared reception range.

[0019] Compared with existing technologies, this drive power supply has the following advantages:

[0020] 1. Because the electrical contacts are located on the side circumference of the circuit board, when the button is pressed, the conductive rubber presses against the electrical contacts along the pressing direction. Therefore, the pressing force generated on the circuit board is along the direction of the circuit board surface, and will not produce tilting or lateral force perpendicular to the board surface. This makes full use of the high rigidity and strength of the circuit board in the length or width direction, so the circuit board will not bend or tilt, ensuring the stability of the circuit board. This improves the contact stability between the conductive rubber and the electrical contacts, thereby improving the stability and service life of the switch.

[0021] 2. Because the conductive coating covers the protrusions, and the conductive rubber is soft, when pressed, the conductive rubber presses against the conductive coating and deforms. The conductive coating can embed itself into the conductive rubber, producing the effect of the conductive rubber covering the conductive coating, increasing the contact area between the conductive rubber and the conductive coating, and thus improving the contact stability between the two.

[0022] 3. Because the upper edge of the circuit board is embedded in the limiting groove, and the bottom surface of the limiting groove abuts against the edge end face of the circuit board, the circuit board positions the mounting part to prevent the mounting part from shifting. The circuit board also supports and positions the sealing part and the mounting part, making the button structure more stable and the sealing more reliable. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the drive power supply.

[0024] Figure 2 This is a top view of the drive power supply.

[0025] Figure 3 yes Figure 2 A partial structural cross-sectional view at point AA.

[0026] Figure 4 yes Figure 3 Enlarged view of the structure at point B in the middle.

[0027] Figure 5 yes Figure 2 A partial structural cross-sectional view at point CC.

[0028] Figure 6 This is a structural diagram of a button.

[0029] Figure 7 yes Figure 2 A partial structural cross-sectional view at point DD.

[0030] In the diagram, 1. Housing; 11. Mounting hole; 12. Sealing flange; 13. Through hole; 2. Button; 21. Mounting part; 22. Pressing part; 23. Elastic diaphragm; 24. Limiting part; 241. Limiting surface; 25. Sealing part; 251. Sealing groove; 26. Limiting groove; 3. Circuit board; 31. Side peripheral surface; 32. Notch; 33. Protrusion; 4. Electrical contact; 41. Conductive plating; 5. Conductive rubber; 6. Lens; 61. Groove; 62. Concave surface; 63. Positioning flange; 7. Infrared receiver head. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0032] Example 1:

[0033] like Figure 1 , Figure 2 , Figure 3 As shown, a driving power supply includes a housing 1, a circuit board 3, and a button 2. The circuit board 3 is vertically fixed inside the housing 1. A mounting hole 11 is provided on the upper surface of the housing 1. The button 2 is fixedly installed in the mounting hole 11. Figure 7 As shown, a through hole 13 is also provided on the upper surface of the housing 1. A circular lens 6 is fixed in the through hole 13. The outer circumferential surface of the lens 6 has a positioning protrusion 63. The inner wall of the through hole 13 is fused and fixed to the outer wall of the lens 6 and the positioning protrusion 63. The inner surface of the lens 6 has a circular groove 61. The bottom surface of the groove 61 has an arc-shaped concave surface 62. An infrared receiver 7 is fixed on the circuit board 3. The infrared receiver 7 is opposite to the concave surface 62 of the lens 6. Figure 4 , Figure 5 As shown, button 2 includes a pressing part 22 that can be pressed inward. The pressing part 22 is columnar and vertically arranged, and the pressing part 22 and the mounting hole 11 have the same center line. That is, the surface of the circuit board 3 is arranged along the pressing direction of the pressing part 22. A sheet of conductive rubber 5 is fixed on the inner end face of the pressing part 22. The pressing part 22 and the conductive rubber 5 are both located directly above the circuit board 3. The circuit board 3 is a double-sided circuit board with two electrical contacts 4. The two electrical contacts 4 are both located on the side peripheral surface 31 of the circuit board 3. The conductive rubber 5 is located above the two electrical contacts 4 and is opposite to the two electrical contacts 4. In the natural state, there is a gap between the conductive rubber 5 and the electrical contacts 4. When button 2 is pressed, the conductive rubber 5 can press against the two electrical contacts 4 along the pressing direction to realize the electrical connection between the two points of contact.

[0034] Specifically, the upper edge of the circuit board 3 has a recessed notch 32, and the side peripheral surface 31 of the circuit board 3 includes an edge end face and a bottom surface of the notch 32. The bottom surface of the notch 32 has two protrusions 33, which are spaced apart along the length of the bottom surface of the notch 32. The two sides of the protrusions 33 are coplanar with the two sides of the circuit board 3. The electrical contact 4 includes a conductive plating layer 41 covering the protrusions 33. The conductive plating layer 41 can be tin-plated, copper-plated, etc. The height of the conductive plating layer 41 is less than the depth of the notch 32. When the button 2 is pressed, the conductive rubber 5 can penetrate into the notch 32 and press against the two conductive plating layers 41.

[0035] Combination Figure 6As shown, button 2 is made of elastic material, such as rubber or silicone. Button 2 also includes a cylindrical mounting part 21, which is located inside the mounting hole 11. The outer peripheral surface of the mounting part 21 is fitted and fixed to the wall of the mounting hole 11 to form a seal. The pressing part 22 is located inside the mounting part 21. The outer end of the pressing part 22 protrudes from the mounting hole 11, and the outer peripheral surface of the outer end of the pressing part 22 is connected to the inner peripheral surface of the outer end of the mounting part 21 through an annular elastic diaphragm 23, so that the pressing part 22 and the mounting part 21 have the same center line. The inner peripheral surface of the mounting part 21 has several radially protruding limiting parts 24. Each limiting part 24 has an arc-shaped limiting surface 241, and the limiting surfaces 241 have the same center line as the pressing part 22. The limiting surfaces 241 are opposite to the pressing part 22, and there is a gap between the limiting surfaces 241 and the outer peripheral surface of the pressing part 22. The inner end of the mounting part 21 has an annular sealing part 25 on its outer circumferential surface. A sealing groove 251 is formed on the end face of the sealing part 25. The inner side of the housing 1 has a sealing protrusion 12 surrounding the mounting hole 11, and the sealing protrusion 12 is embedded in the sealing groove 251 to form a sealed connection. A limiting groove 26 is formed on the lower end face of the mounting part 21. The inner end of the limiting groove 26 penetrates the inner circumferential surface of the mounting part 21, and the outer end penetrates the outer circumferential surface of the sealing part 25. The upper edge of the circuit board 3 is embedded in the limiting groove 26, and the bottom surface of the limiting groove 26 abuts against the edge end face of the circuit board 3. The inner end face of the conductive rubber 5 is flush with the bottom surface of the limiting groove 26.

[0036] Example 2:

[0037] The structure of the driving power supply is basically the same as that of Embodiment 1. The difference is that the edge of the circuit board 3 has a protruding boss. The side peripheral surface 31 of the circuit board 3 includes an edge end face and a boss platform. The electrical contact 4 is located on the boss platform. This structure allows the boss to protrude directly from the edge end face of the circuit board 3, eliminating the need for an opening design in the circuit board 3.

[0038] Example 3:

[0039] The structure of this driving power supply is basically the same as that of Embodiment 1. The difference is that the side peripheral surface 31 of the circuit board 3 includes a flat edge end face, and the electrical contact 4 is located on the edge end face. The structure is simple and the processing is more convenient.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0041] Although this document frequently uses terms such as housing 1, mounting hole 11, and sealing flange 12, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A driving power supply, comprising a housing (1), a button (2) disposed on the housing (1) and pressable inward, and a circuit board (3) fixed inside the housing (1), wherein the surface of the circuit board (3) is arranged along the pressing direction of the button (2), and the circuit board (3) has two electrical contacts (4), characterized in that, The inner end of the button (2) has conductive rubber (5), and the two electrical contacts (4) are located on the side peripheral surface (31) of the circuit board (3). The conductive rubber (5) is opposite to the two electrical contacts (4), and when the button (2) is pressed, the conductive rubber (5) can press against the two electrical contacts (4) in the pressing direction. The edge of the circuit board (3) has a concave notch (32), and the bottom surface of the notch (32) has two protrusions (33). The two protrusions (33) are spaced apart along the length direction of the bottom surface of the notch (32). The electrical contacts (4) include a conductive plating layer (41) covering the protrusions (33). The height of the conductive plating layer (41) is less than the depth of the notch (32). When the button (2) is pressed, the conductive rubber (5) can be embedded in the notch (32).

2. The driving power supply according to claim 1, characterized in that, The side peripheral surface (31) of the circuit board (3) includes the edge end face and the bottom surface of the notch (32).

3. The driving power supply according to claim 2, characterized in that, The two sides of the protrusion (33) are coplanar with the two sides of the circuit board (3).

4. The driving power supply according to claim 3, characterized in that, The button (2) is made of elastic material. The button (2) includes a cylindrical mounting part (21) and a pressing part (22) located inside the mounting part (21) and connected to the mounting part (21). The mounting part (21) is fixedly connected to the housing (1). The pressing part (22) is columnar, and the inner end of the pressing part (22) is opposite to the two electrical contacts (4). The conductive rubber (5) is fixed on the inner end face of the pressing part (22).

5. The driving power supply according to claim 4, characterized in that, The housing (1) has an installation hole (11). The installation part (21) is located inside the installation hole (11), and the outer peripheral surface of the installation part (21) is attached to the wall of the installation hole (11). The outer peripheral surface of the pressing part (22) is connected to the inner peripheral surface of the outer end of the installation part (21) through an annular elastic diaphragm (23). The inner peripheral surface of the installation part (21) has several radially protruding limiting parts (24) in the circumferential direction. Each limiting part (24) has an arc-shaped limiting surface (241). The limiting surface (241) is opposite to the pressing part (22), and there is a gap between the limiting surface (241) and the outer peripheral surface of the pressing part (22).

6. The driving power supply according to claim 5, characterized in that, The inner end of the mounting part (21) has an annular sealing part (25) on its outer peripheral surface. The sealing part (25) has a sealing groove (251) on its end face. The inner side of the housing (1) has a sealing protrusion (12) surrounding the mounting hole (11), and the sealing protrusion (12) is embedded in the sealing groove (251) to form a fixed connection.

7. The driving power supply according to claim 6, characterized in that, The mounting part (21) has a radially arranged limiting groove (26) on its lower end surface. The upper edge of the circuit board (3) is embedded in the limiting groove (26), and the bottom surface of the limiting groove (26) abuts against the edge end surface of the circuit board (3). The inner end surface of the conductive rubber (5) is flush with the bottom surface of the limiting groove (26).

8. The driving power supply according to claim 3, characterized in that, The circuit board (3) has a protruding boss on its edge, and the side peripheral surface (31) of the circuit board (3) includes an edge end face and a boss platform, and the electrical contact (4) is located on the boss platform.

9. The driving power supply according to claim 8, characterized in that, The side peripheral surface (31) of the circuit board (3) includes a flat edge end face, and the electrical contact (4) is located on the edge end face.

10. The driving power supply according to any one of claims 1 to 3, characterized in that, A through hole (13) is provided on the end face of the housing (1). A lens (6) is fixed in the through hole (13). The inner side of the lens (6) is an arc-shaped concave surface (62). An infrared receiver (7) is fixed on the circuit board (3). The infrared receiver (7) is opposite to the concave surface (62).

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