A structure for improving transformer withstand voltage

Abstract

The present invention discloses a structure for improving the withstand voltage of a transformer, which relates to the technical field of transformers and includes a high-frequency transformer body. The high-frequency transformer body includes a manganese-zinc ferrite, with metal steel clips fixedly mounted on both sides of the outer wall of the manganese-zinc ferrite, and an insulating sheet fixedly mounted on the bottom outer wall of the manganese-zinc ferrite. The present invention significantly increases the creepage distance by adding an insulating sheet between the manganese-zinc ferrite and the bakelite frame. This solves the problems of the existing withstand voltage method for ultra-thin transformer products, such as the tendency of "L"-shaped tape to be applied crookedly, the uncontrollable process resulting in a high defect rate, the possibility of bubbles generated by the glue during dispensing causing some products to be unqualified, and the need to open a mold to extend the frame, which increases costs and product volume and results in a low power density. The present invention achieves the effect of simple assembly with mass production feasibility, reduces the difficulty of the production process, improves production efficiency, prevents differences in manual operation, thereby reducing the defect rate, and improving product reliability and market competitiveness.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a structure for improving the withstand voltage of a transformer. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, the secondary coil, and the magnetic core. Its main functions include voltage conversion, current conversion, impedance conversion, isolation, and voltage stabilization. A high-frequency transformer refers to a device with an operating frequency exceeding the medium frequency (10kHz). It is mainly used for medium-high frequency, and is also used for high-frequency inverter power transformers in combination with high frequency. In order to ensure electrical safety, high-frequency transformers have strict safety regulations. The primary, secondary, and coils must be effectively isolated. When AC is input, the transformer must have a safe distance to achieve isolation between the primary and secondary. The primary and secondary windings of the transformer are isolated with insulating tape. If there is no good isolation, AC may pass directly through the secondary output. When the human body touches an electronic product (such as the output end of a mobile phone charger), the primary AC passes through the human body and forms a loop with the earth, causing electric shock. Therefore, it is necessary to perform high-voltage testing on the transformer to detect the transformer's voltage resistance. The following problems exist in the existing technology:

[0003] Because the existing ultra-thin transformer product voltage resistance method uses manual "L"-shaped tape on the surface of the core close to the frame, or glue is dispensed at the junction of the core and the frame, and the frame is extended to make the pins away from the core and steel clamps, which increases the product volume. As a result, the "L"-shaped tape is easily attached crookedly, the process is uncontrollable, resulting in a high defective rate. The dispensed glue may produce bubbles, causing some products to be unqualified. In addition, extending the frame requires mold opening, which increases costs, increases product volume, and causes low power density. Summary of the Invention

[0004] The present invention provides a structure for improving the withstand voltage of a transformer to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The heat dissipation device is connected with the heat dissipation device of the heat dissipation device to the heat dissipation device, and the heat dissipation device is connected with the heat dissipation device to the heat dissipation device. The heat dissipation device is connected with the heat dissipation device to the heat dissipation device. The heat dissipation device is connected with the heat dissipation device to the heat dissipation device.

[0007] A further improvement of the technical solution of the present invention is that an insulator fixing plate is fixedly mounted on the outer wall of the bakelite frame base, and the top outer wall of the insulator fixing plate overlaps the bottom outer wall of the insulating sheet.

[0008] A further improvement of the technical solution of the present invention is that: a spring buckle is fixedly installed on the top of the insulator fixing plate, a pressure plate is fixedly installed on one side outer wall of the spring buckle, a connecting belt is fixedly installed on the inner outer wall of the pressure plate, and one end of the connecting belt is fixedly connected to the top outer wall of the insulator fixing plate.

[0009] A further improvement of the technical solution of the present invention is that: a button is overlapped in the groove of the inner outer wall of the bakelite frame, a pressure rod is fixedly installed on the bottom outer wall of the button, a sliding rod is fixedly installed on the left inner wall of the bakelite frame, the upper and lower inner walls of the bottom of the button are slidably connected to the outer wall of the sliding rod, and an elastic ball is movably installed on the outer wall of the sliding rod.

[0010] A further improvement of the technical solution of the present invention is that: a movable rod 2 is movably installed on the top of the pressure rod, a fixed plate is fixedly installed on the inner wall of the bakelite frame, a movable disk is slidably connected in the sliding groove of the fixed plate, and the top of the movable rod 2 is movably connected to the outer wall of the movable disk.

[0011] A further improvement of the technical solution of the present invention is that the outer wall of the movable plate is movably connected to a movable rod 1, the left top end of the movable rod 1 is movably connected to a connecting block, and a connecting rope is fixedly installed on the inner wall of the connecting block.

[0012] A further improvement of the technical solution of the present invention is that: both ends of the connecting rope are fixedly connected with fixed clips, the outer walls of the fixed clips are clipped with grooves on both sides of the bottom outer wall of the bakelite frame base, and a clip spring is fixedly installed on the rear outer wall of the fixed clip, and the bottom outer wall of the clip spring is fixedly connected to the inner wall of the bakelite frame.

[0013] A further improvement of the technical solution of the present invention is that a push rod is movably installed in the groove on the outer wall of the button, a pull rope is fixedly installed on the outer wall of the rotating shaft of the push rod, the top end of the pull rope is fixedly connected to a pull block, a compression spring is fixedly installed on the rear outer wall of the pull block, and the top outer wall of the compression spring is fixedly connected to the inner wall of the button.

[0014] Due to the adoption of the above technical solution, the present invention has the following technical advancements compared to the prior art:

[0015] 1. The present invention provides a structure for improving the withstand voltage of transformers, which adopts the combination of insulating sheets, manganese-zinc ferrite, and bakelite frames. By adding an insulating sheet between the manganese-zinc ferrite and the bakelite frame, although the material cost is increased, the creepage distance can be greatly increased. The withstand voltage method of existing ultra-thin transformer products solves the problem that the "L"-shaped tape is easily attached to the surface of the magnetic core close to the frame, or glue is applied at the junction of the magnetic core and the frame, and the frame is extended to keep the pins away from the magnetic core and the steel clamp, which increases the volume of the product. As a result, the "L"-shaped tape is easily attached crookedly, the process is uncontrollable, resulting in a high defect rate, the glue applied may produce bubbles, causing some products to be unqualified, and the extension of the frame requires mold opening, which increases the cost, increases the volume of the product, and causes a low power density. The present invention achieves the goal of simple assembly and mass production feasibility. Compared with traditional solutions, the difficulty of the production process is reduced, production efficiency is improved, and differences in manual operation are prevented, thereby reducing the defect rate and improving product reliability and market competitiveness.

[0016] 2. The present invention provides a structure for improving the withstand voltage of a transformer. Through the cooperation of a heat sink, a heat sink base, a heat sink fixing plate, a piston chamber, a piston spring, a piston rod, and an arc clip, the heat sink bases at both ends of the heat sink are clipped into the heat sink fixing plate, so that the arc clip squeezes the piston rod through the piston spring in the piston chamber and is thereby clipped into the groove on the outer wall of the heat sink base and fixed, so that the heat sink is close to the main body of the high-frequency transformer, which solves the problem that most existing high-frequency transformers use air cooling for cooling, resulting in poor cooling effect and reduced withstand voltage effect of the high-frequency transformer. The heat dissipation effect of the high-frequency transformer is improved by having the heat sink close to the high-temperature transformer, thereby improving the withstand voltage efficiency.

[0017] 3. The present invention provides a structure for improving the voltage resistance of a transformer, which adopts the cooperation of a button, a pressure rod, a second movable rod, a first movable rod, a movable disk, a fixed plate, a connecting block, a connecting rope, a buckle spring, and a fixed buckle. By pressing the button, the pressure rod squeezes the second movable rod inward, driving the movable disk to move downward in the sliding groove of the fixed plate, and at the same time, the first movable rod pulls the connecting block downward, so that the connecting block pulls the connecting rope downward, and the fixed buckles on both sides move inward and disengage from the grooves on both sides of the bottom outer wall of the bakelite frame base. The entire high-frequency transformer body can be disassembled, which solves the problem that most of the metal pins at the bottom of the existing high-frequency transformer are installed in a fixed installation manner in the switching power supply, and most of them are fixedly connected to the bakelite frame at the bottom of the high-frequency transformer, and the bakelite frame and the high-frequency transformer are integrated, resulting in slow disassembly when the high-frequency transformer needs to be repaired, inspected and disassembled, which affects the maintenance efficiency. The bakelite frame can be quickly disassembled, separated from the high-frequency transformer body, conveniently repaired, and improved maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the main body of the high-frequency transformer of the present invention;

[0020] Figure 3 Schematic cross-sectional view of the buffer structure of the present invention;

[0021] Figure 4 A schematic cross-sectional view of a bakelite skeleton structure of the present invention;

[0022] Figure 5 A schematic cross-sectional view of a button structure of the present invention;

[0023] Figure 6 A cross-sectional schematic diagram of a heat sink fixing plate of the structure of the present invention;

[0024] In the figure: 1. High-frequency transformer body; 11. Metal steel clip; 12. Insulation sheet; 13. Manganese-zinc ferrite; 2. Heat sink; 21. Heat sink base; 22. Heat sink fixing plate; 221. Piston chamber; 222. Piston spring; 223. Piston rod; 224. Arc buckle; 3. Metal pin; 31. Bakelite frame; 311. Sliding rod; 312. Elastic ball; 313. Moving disk; 314. Fixing plate; 315. Movable rod 1; 316. Connecting block; 317. Connecting rope; 318. Buckle spring; 319. Fixing buckle; 32. Bakelite frame base; 321. Insulator fixing plate; 322. Pressing plate; 323. Connecting belt; 324. Spring buckle; 33. Button; 331. Pressing rod; 332. Movable rod 2; 333. Push rod; 334. Pull rope; 335. Pull block; 336. Compression spring. DETAILED DESCRIPTION

[0025] The present invention is described in further detail below in conjunction with the embodiments:

[0026] Example 1

[0027] like Figure 1-6 As shown, the present invention provides a structure for improving the withstand voltage of a transformer, including a high-frequency transformer body 1, the high-frequency transformer body 1 includes a manganese-zinc ferrite 13, metal steel clips 11 are fixedly installed on the outer walls of both sides of the manganese-zinc ferrite 13, an insulating sheet 12 is fixedly installed on the bottom outer wall of the manganese-zinc ferrite 13, a bakelite frame base 32 is fixedly installed on the bottom of the insulating sheet 12, a bakelite frame 31 is fixedly installed on the bottom of the bakelite frame base 32, and metal pins 3 are fixedly installed on the outer walls of both sides of the bakelite frame 31.

[0028] In this embodiment, the manganese-zinc ferrite 13, the metal steel clip 11, and the metal pin 3 are all conductors, and the bakelite frame base 32, the bakelite frame 31, and the insulating sheet 12 are all insulators. By adding an insulating sheet 12 with a thickness of about 0.1 mm, the creepage distance between the metal pin 3 and the magnetic core is greatly improved. When calculating the creepage distance of the finished product, it is superimposed, and the creepage distance is increased, thereby improving the product's voltage resistance.

[0029] Example 2

[0030] like Figure 1-4 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the front outer wall of the manganese-zinc ferrite 13 is overlapped with a heat sink 2, and the outer walls on both sides of the heat sink 2 are fixedly installed with a heat sink base 21, the front outer wall of the manganese-zinc ferrite 13 is fixedly installed with a heat sink fixing plate 22, the outer wall of the heat sink base 21 is clamped with the inner outer wall of the heat sink fixing plate 22, the inner cavity of the heat sink fixing plate 22 is fixedly installed with a piston compartment 221, the inner cavity of the piston compartment 221 is fixedly installed with a piston spring 222, the inner wall of the piston compartment 221 is movably installed with a piston rod 223, the top of the piston rod 223 is fixedly installed with an arc buckle 224, and the outer wall of the arc buckle 224 is clamped with the outer wall groove of the heat sink base 21.

[0031] In this embodiment, the heat sink base 21 at both ends of the heat sink 2 is clamped into the heat sink fixing plate 22, so that the arc buckle 224 squeezes the piston rod 223 through the piston spring 222 in the piston compartment 221, thereby being clamped into the groove on the outer wall of the heat sink base 21 and fixed, so that the heat sink 2 is close to the high-frequency transformer body 1, and the heat dissipated by the high-frequency transformer body 1 is absorbed. The heat sink 2 is made of thermally conductive silicone material and has high thermal conductivity. After long-term use, the heat sink 2 can be taken out and replaced by pulling it upward.

[0032] Example 3

[0033] like Figure 1-6 As shown, based on Example 1, the present invention provides a technical solution: preferably, an outer wall of the bakelite frame base 32 is fixedly installed with an insulator fixing plate 321, the top outer wall of the insulator fixing plate 321 overlaps the bottom outer wall of the insulating sheet 12, and a spring buckle 324 is fixedly installed on the top of the insulator fixing plate 321. A pressure plate 322 is fixedly installed on the outer wall of one side of the spring buckle 324, and a connecting belt 323 is fixedly installed on the inner outer wall of the pressing plate 322. One end of the connecting belt 323 is fixedly connected to the top outer wall of the insulator fixing plate 321.

[0034] In this embodiment, since the insulating sheet 12 extends out and is relatively thin, an insulator fixing plate 321 is provided at the bottom of the insulating sheet 12 to prevent the insulating sheet 12 from being squeezed and broken during transportation. When the top is squeezed, the pressure plate 322 squeezes the spring buckle 324 to produce a buffer, thereby improving the protection effect.

[0035] Example 4

[0036] like Figure 1-6 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, a button 33 is overlapped on the inner outer wall groove of the bakelite frame 31, a pressure rod 331 is fixedly installed on the bottom outer wall of the button 33, a sliding rod 311 is fixedly installed on the left inner wall of the bakelite frame 31, the upper and lower inner walls of the bottom of the button 33 are slidably connected to the outer wall of the sliding rod 311, an elastic ball 312 is movably installed on the outer wall of the sliding rod 311, a movable rod 2 332 is movably installed on the top of the pressure rod 331, a fixed plate 314 is fixedly installed on the inner wall of the bakelite frame 31, a movable disk 313 is slidably connected in the slide groove of the fixed plate 314, the top of the movable rod 2 332 is movably connected to the outer wall of the movable disk 313, the outer wall of the movable disk 313 is movably connected to the movable rod 1 315, and the movable rod 1 The top left side of 315 is movably connected to a connecting block 316, the inner wall of the connecting block 316 is fixedly installed with a connecting rope 317, both ends of the connecting rope 317 are fixedly connected with fixing buckles 319, the outer wall of the fixing buckle 319 is clamped with the grooves on both sides of the bottom outer wall of the bakelite frame base 32, the rear outer wall of the fixing buckle 319 is fixedly installed with a buckle spring 318, the bottom outer wall of the buckle spring 318 is fixedly connected to the inner wall of the bakelite frame 31, the outer wall groove of the button 33 is movably installed with a push rod 333, the outer wall of the rotating shaft of the push rod 333 is fixedly installed with a pull rope 334, the top of the pull rope 334 is fixedly connected to the pull block 335, the rear outer wall of the pull block 335 is fixedly installed with a compression spring 336, and the top outer wall of the compression spring 336 is fixedly connected to the inner wall of the button 33.

[0037] In this embodiment, when the high-frequency transformer body 1 needs to be repaired, the button 33 is pressed to make the pressure rod 331 squeeze the movable rod 2 332 inward, driving the movable plate 313 to move downward in the sliding groove of the fixed plate 314, and at the same time, the movable rod 1 315 pulls the connecting block 316 downward, so that the connecting block 316 pulls the connecting rope 317 downward, so that the fixing buckles 319 on both sides move inward and disengage from the grooves on both sides of the bottom outer wall of the bakelite frame base 32. The whole high-frequency transformer body 1 is separated from the bakelite frame 31, which is convenient for maintenance. After the maintenance is completed, the bakelite frame base 32 is squeezed downward to fix the buckle 31 9. The beveled edge of the outer wall of the fixing buckle 319 is used to squeeze the buckle spring 318 inward, so that it is stuck in the groove at the bottom of the bakelite frame base 32 and fixed. When the button 33 is pressed, the push rod 333 is rotated through the groove on the outer wall of the button 33, and the pull rope 334 is tightened, driving the pull block 335 to squeeze the compression spring 336, which facilitates the inward squeezing of the button 33. After the push rod 333 is used, the compression spring 336 squeezes the pull block 335 to straighten the pull rope 334, and the push rod 333 is rotated to reset. After the button 33 is used, the elastic balls 312 on the slide bar 311 squeeze each other to reset the button 33.

[0038] The following is a detailed description of the working principle of the transformer voltage-proof structure.

[0039] like Figure 1-6 As shown in the figure, by adding an insulating sheet between the manganese-zinc ferrite and the bakelite frame, the creepage distance between the pin and the core is greatly improved. When calculating the creepage distance of the finished product, it is superimposed. Increasing the creepage distance improves the product's voltage resistance. This solution uses a very thin insulating sheet, which can take advantage of the assembly tolerance between the core and the frame. No additional changes to the frame and core are required. Without increasing the product size, the power output requirements and safety requirements are met, thereby achieving higher power output with a smaller volume. With very little increase in cost, the power density is improved, that is, higher power output is achieved with a smaller volume.

[0040] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made based on the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A transformer withstand voltage improvement structure, comprising a high-frequency transformer body (1), characterized in that: The high-frequency transformer body (1) includes a manganese-zinc ferrite (13), the outer walls of both sides of the manganese-zinc ferrite (13) are fixedly mounted with metal steel clips (11), the outer wall of the bottom of the manganese-zinc ferrite (13) is fixedly mounted with an insulating sheet (12), the bottom of the insulating sheet (12) is fixedly mounted with a bakelite frame base (32), the bottom of the bakelite frame base (32) is fixedly mounted with a bakelite frame (31), the outer walls of both sides of the bakelite frame (31) are fixedly mounted with metal pins (3), the outer wall of the front side of the manganese-zinc ferrite (13) is overlapped with a heat sink (2), and the outer walls of both sides of the heat sink (2) are fixedly mounted with heat sinks. The base (21) is fixedly mounted with a heat sink fixing plate (22) on the front outer wall of the manganese-zinc ferrite (13); the outer wall of the heat sink base (21) is clamped with the inner outer wall of the heat sink fixing plate (22); the inner cavity of the heat sink fixing plate (22) is fixedly mounted with a piston chamber (221); the inner cavity of the piston chamber (221) is fixedly mounted with a piston spring (222); the inner wall of the piston chamber (221) is movably mounted with a piston rod (223); the top end of the piston rod (223) is fixedly mounted with an arc buckle (224); the outer wall of the arc buckle (224) is clamped with the outer wall groove of the heat sink base (21).

2. The transformer withstand voltage improvement structure according to claim 1, characterized in that: An insulator fixing plate (321) is fixedly mounted on the outer wall of the bakelite frame base (32), and the top outer wall of the insulator fixing plate (321) overlaps the bottom outer wall of the insulating sheet (12).

3. The transformer withstand voltage improvement structure according to claim 2, characterized in that: A spring buckle (324) is fixedly mounted on the top of the insulator fixing plate (321), a pressure plate (322) is fixedly mounted on one side outer wall of the spring buckle (324), a connecting belt (323) is fixedly mounted on the inner outer wall of the pressure plate (322), and one end of the connecting belt (323) is fixedly connected to the top outer wall of the insulator fixing plate (321).

4. The transformer withstand voltage improvement structure according to claim 1, characterized in that: A button (33) is overlapped with the inner outer wall groove of the bakelite frame (31); a pressure rod (331) is fixedly installed on the bottom outer wall of the button (33); a slide bar (311) is fixedly installed on the left inner wall of the bakelite frame (31); the upper and lower inner walls of the bottom of the button (33) are slidably connected to the outer wall of the slide bar (311); and an elastic ball (312) is movably installed on the outer wall of the slide bar (311).

5. The transformer withstand voltage improvement structure according to claim 4, characterized in that: A movable rod 2 (332) is movably mounted on the top of the pressure rod (331), a fixed plate (314) is fixedly mounted on the inner wall of the bakelite frame (31), a movable disk (313) is slidably connected in the sliding groove of the fixed plate (314), and the top of the movable rod 2 (332) is movably connected to the outer wall of the movable disk (313).

6. The transformer withstand voltage improvement structure according to claim 5, characterized in that: The outer wall of the movable plate (313) is movably connected to a movable rod (315), the left top end of the movable rod (315) is movably connected to a connecting block (316), and the inner wall of the connecting block (316) is fixedly installed with a connecting rope (317).

7. The transformer withstand voltage improvement structure according to claim 6, characterized in that: The two ends of the connecting rope (317) are fixedly connected with fixed buckles (319), the outer wall of the fixed buckle (319) is clamped with the grooves on both sides of the bottom outer wall of the bakelite frame base (32), and the rear outer wall of the fixed buckle (319) is fixedly installed with a buckle spring (318), and the bottom outer wall of the buckle spring (318) is fixedly connected to the inner wall of the bakelite frame (31).

8. The transformer withstand voltage improvement structure according to claim 7, characterized in that: A push rod (333) is movably mounted in the groove on the outer wall of the button (33); a pull rope (334) is fixedly mounted on the outer wall of the rotating shaft of the push rod (333); a pull block (335) is fixedly connected to the top end of the pull rope (334); a compression spring (336) is fixedly mounted on the rear outer wall of the pull block (335); and the top outer wall of the compression spring (336) is fixedly connected to the inner wall of the button (33).

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