Anti-surge circuit board for cold start of switching power supply

Abstract

The utility model discloses a switching power supply cold start anti-surge circuit board, which comprises a circuit board body and a rapid installation mechanism, the circuit board body is provided with a switching power supply cold start anti-surge circuit, the inner bottom of a shell is fixedly connected with an installation pipe, the circuit board body is provided with a round hole, and the installation pipe is fixedly connected with the installation pipe. The circuit board body sleeves the mounting pipe through the round hole, the quick mounting mechanism comprises a fixing cap, a through hole is formed in the side face of the fixing cap, a rotating rod is rotationally mounted in the through hole, a clamping head is fixedly connected to the lower end of the rotating rod, a clamping groove is formed in the outer wall of the upper end of the mounting pipe, and after the fixing cap sleeves the upper end of the mounting pipe, the clamping head can be clamped into the clamping groove; according to the utility model, the circuit board body and the housing can be quickly assembled and disassembled through the arranged quick installation mechanism.

Description

Technical Field

[0001] This utility model relates to the field of circuit board technology, and in particular to a surge-resistant circuit board for cold start of a switching power supply. Background Technology

[0002] In the widespread application of electronic devices, switching power supplies, as the core component of power supply, directly affect the operating efficiency and reliability of the entire system through their stability and maintainability. Traditional switching power supply circuit boards are typically mounted inside the power supply casing using screws, soldering, or other fixing methods. While this design enhances structural stability, it also leads to inconvenience in disassembly and assembly. When repairs are required, the traditional design makes disassembly and assembly difficult, increasing both the difficulty and time required for repairs.

[0003] To address this, a surge-resistant circuit board for cold-start switching power supplies is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a surge protection circuit board for cold start of a switching power supply, thereby solving or at least mitigating one or more of the above-mentioned problems and other issues existing in the prior art.

[0005] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0006] A cold start surge protection circuit board for a switching power supply includes a circuit board body, the circuit board body having a cold start surge protection circuit for the switching power supply, a mounting tube fixedly connected to the inner bottom of the housing, and a circular hole opened on the circuit board body, the circuit board body being sleeved on the mounting tube through the circular hole.

[0007] A quick-installation mechanism to prevent the circuit board body from detaching from the mounting tube includes a fixing cap, a through hole on the side of the fixing cap, a rotating rod rotatably installed in the through hole, a clamping head fixedly connected to the lower end of the rotating rod, and a slot on the upper outer wall of the mounting tube. After the fixing cap is fitted onto the upper end of the mounting tube, the clamping head can be engaged in the slot.

[0008] In a cold start surge protection circuit board for a switching power supply according to the present invention, an elastic sheet is provided inside the fixing cap. The elastic sheet is arranged in an inverted V shape, and the lower end of the elastic sheet abuts against the upper end of the rotating rod.

[0009] In a cold start surge protection circuit board for a switching power supply according to the present invention, the elastic sheet is fixed to the inner top of the fixing cap by screws.

[0010] In a cold start surge protection circuit board for a switching power supply according to the present invention, the slot is arranged in a ring shape.

[0011] In a cold start surge protection circuit board for a switching power supply according to the present invention, a guide cut is provided at the top of the mounting tube.

[0012] In a cold start surge protection circuit board for a switching power supply according to the present invention, the upper end of the rotating rod is provided with a protrusion.

[0013] In a cold start surge protection circuit board for a switching power supply according to the present invention, the surface of the protrusion is provided with anti-slip texture.

[0014] In a cold start surge protection circuit board for a switching power supply according to the present invention, a support ring is formed on the upper outer wall of the mounting tube, and the bottom of the circuit board body is pressed on the support ring.

[0015] In a cold start surge protection circuit board for a switching power supply according to the present invention, the surface of the elastic sheet is coated with an epoxy resin anti-oxidation coating.

[0016] In a cold start surge protection circuit board for a switching power supply according to the present invention, the mounting tube and the housing are integrally formed.

[0017] The utility model has at least the following beneficial effects:

[0018] The cold start surge protection circuit board for switching power supplies provided by this utility model can achieve quick assembly and disassembly between the circuit board body and the housing through the set quick installation mechanism. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a schematic diagram of the cold start surge protection circuit board for the switching power supply of this utility model;

[0021] Figure 2 This is a partial structural schematic diagram of the surge protection circuit board for cold start of the switching power supply of this utility model;

[0022] Figure 3 This is a partial cross-sectional view of the surge protection circuit board for cold start of the switching power supply of this utility model.

[0023] Figure 4 This is a structural schematic diagram of the quick installation mechanism of this utility model;

[0024] Figure 5 for Figure 3 A magnified structural diagram of part A in the diagram;

[0025] Figure 6 This is the circuit diagram of the cold start surge protection circuit for the switching power supply of this utility model.

[0026] Explanation of icon numbers:

[0027] 1. Circuit board body; 101. Round hole; 2. Quick installation mechanism; 201. Fixing cap; 202. Through hole; 203. Rotating rod; 204. Clip; 205. Protrusion; 206. Anti-slip texture; 207. Elastic sheet; 208. Screw; 3. Housing; 301. Mounting tube; 302. Support ring; 303. Slot; 304. Guide cut. Detailed Implementation

[0028] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0029] Please refer to Figures 1 to 6 As shown, this embodiment provides a cold start surge protection circuit board for a switching power supply (such as...). Figure 6 As shown, it includes a circuit board body 1 and a quick installation mechanism 2. An installation tube 301 is fixedly connected to the inner bottom of the housing 3. A round hole 101 is opened on the circuit board body 1, and the circuit board body 1 is sleeved on the installation tube 301 through the round hole 101.

[0030] The quick-installation mechanism 2 for preventing the circuit board body 1 from detaching from the mounting tube 301 includes a fixing cap 201. The fixing cap 201 has a through hole 202 on its side. A rotating rod 203 is rotatably installed in the through hole 202. A clip 204 is fixedly connected to the lower end of the rotating rod 203. A slot 303 is provided on the upper outer wall of the mounting tube 301. After the fixing cap 201 is fitted onto the upper end of the mounting tube 301, the clip 204 can be inserted into the slot 303. To prevent the clip 204 from easily falling out of the slot 303, an elastic piece 207 is provided inside the fixing cap 201. The elastic piece 207 is inverted V-shaped. The lower end of the elastic piece 207 abuts against the upper end of the rotating rod 203. In order to leave sufficient heat dissipation space between the bottom of the circuit board body 1 and the housing 3, a support ring 302 is formed on the upper outer wall of the mounting tube 301. The bottom of the circuit board body 1 is pressed on the support ring 302.

[0031] By adopting the above technical solution, when installing the circuit board body 1, the circuit board body 1 is fitted onto the mounting tube 301 through the round hole 101, and the upper end of the rotating rod 203 is pressed towards the inside of the fixing cap 201, so that the clip 204 is tilted outward from the fixing cap 201. Then the fixing cap 201 is fitted onto the mounting tube 301, and then the rotating rod 203 is released. At this time, the upper end of the rotating rod 203 is pressed by the elastic sheet 207, so that the clip 204 can be stably locked in the slot 303, thereby fixing the circuit board body 1 onto the mounting tube 301.

[0032] During disassembly, press the upper end of the rotating rod 203 towards the inside of the fixing cap 201, causing the clip 204 to tilt outward from the fixing cap 201, thereby disengaging the clip 204 from the slot 303. Then, pull the fixing cap 201 upward to unlock the circuit board body 1.

[0033] Specifically, in this embodiment, the elastic sheet 207 is fixed to the inner top of the fixing cap 201 by screws 208. In order to improve the service life of the elastic sheet 207, the surface of the elastic sheet 207 is coated with an epoxy resin anti-oxidation coating.

[0034] Specifically, the slot 303 is arranged in a ring shape. With this arrangement, when the fixing cap 201 is put on the mounting tube 301, the clip 204 can be inserted into the slot 303 at any position, making the operation more convenient.

[0035] Specifically, in order to facilitate the pressing of the rotating rod 203, a protrusion 205 is formed on the upper end of the rotating rod 203. To prevent the hand from slipping when pressing the protrusion 205, anti-slip texture 206 is formed on the surface of the protrusion 205.

[0036] Specifically, the top of the mounting tube 301 is provided with a guide cutout 304. With the guide cutout 304, when the fixing cap 201 is put on the mounting tube 301, there is no need to squeeze the upper end of the rotating rod 203. Just press the fixing cap 201 down, and the clamp 204 can move into the clamp slot 303 along with the guide cutout 304, making the operation more convenient.

[0037] like Figure 6 Therefore, the circuit board body 1 has a cold start surge protection circuit for the switching power supply. Through the set cold start surge protection circuit for the switching power supply, the 220V switching power supply is cold started. The negative temperature coefficient thermistor RT1 reduces the inrush current of the input electrolytic capacitor, and JK1 is in the normally open state.

[0038] When the half-bridge converter circuit is working normally, the complementary PWM drive signal switch of U2 enters the normal switching state. The lower arm M4-PWML signal of the half-bridge is divided by D9, R50 / R51 / C44 to turn on U8. VCC12V is energized by RX to the relay, RT1 is shorted, and the surge-resistant soft start is completed.

[0039] By configuring a cold-start surge protection circuit for the switching power supply, the thermistor is shorted by the relay only after the switching circuit is operating normally. Under no-load conditions, the relay does not trip. This effectively prevents excessive inrush current and has no impact on the overall efficiency of the machine.

[0040] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A surge-resistant circuit board for cold start of a switching power supply, characterized in that, include: The circuit board body (1) has a cold start anti-surge circuit for the switching power supply. The inner bottom of the housing (3) is fixedly connected to the mounting tube (301). The circuit board body (1) has a round hole (101). The circuit board body (1) is sleeved on the mounting tube (301) through the round hole (101). A quick-installation mechanism (2) is provided to prevent the circuit board body (1) from detaching from the mounting tube (301). The quick-installation mechanism (2) includes a fixing cap (201). A through hole (202) is provided on the side of the fixing cap (201). A rotating rod (203) is rotatably installed in the through hole (202). A clip (204) is fixedly connected to the lower end of the rotating rod (203). A slot (303) is provided on the outer wall of the upper end of the mounting tube (301). After the fixing cap (201) is fitted onto the upper end of the mounting tube (301), the clip (204) can be inserted into the slot (303).

2. The surge protection circuit board for cold start of a switching power supply according to claim 1, characterized in that: The fixed cap (201) is provided with an elastic piece (207) inside. The elastic piece (207) is arranged in an inverted V shape, and the lower end of the elastic piece (207) abuts against the upper end of the rotating rod (203).

3. The surge protection circuit board for cold start of a switching power supply according to claim 2, characterized in that: The elastic sheet (207) is fixed to the inner top of the fixing cap (201) by screws (208).

4. The surge protection circuit board for cold start of a switching power supply according to claim 3, characterized in that: The card slot (303) is arranged in a ring shape.

5. The surge protection circuit board for cold start of a switching power supply according to claim 4, characterized in that: The top of the mounting tube (301) is provided with a guide cutout (304).

6. The surge protection circuit board for cold start of a switching power supply according to claim 2, characterized in that: The upper end of the rotating rod (203) is provided with a protrusion (205).

7. The surge protection circuit board for cold start of a switching power supply according to claim 6, characterized in that: The surface of the protrusion (205) is provided with anti-slip texture (206).

8. The surge protection circuit board for cold start of a switching power supply according to claim 7, characterized in that: The upper outer wall of the installed tube (301) is provided with a support ring (302), and the bottom of the circuit board body (1) is pressed on the support ring (302).

9. A surge protection circuit board for cold start of a switching power supply according to claim 2, characterized in that: The surface of the elastic sheet (207) is coated with an epoxy resin anti-oxidation coating.

10. A cold-start surge protection circuit board for a switching power supply according to any one of claims 1-9, characterized in that: The mounting tube (301) and the housing (3) are integrally formed.

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