Laminated high-frequency miniature transformer

Abstract

The invention discloses a laminated high-frequency miniature transformer, and relates to the technical field of transformers, the laminated high-frequency miniature transformer comprises a transformer body, the transformer body comprises a lower magnetic core, the top end of the lower magnetic core is provided with an upper magnetic core, the inner side of the upper magnetic core and the inner side of the lower magnetic core are sleeved with frameworks, the outer surfaces of the frameworks are sleeved with substrates, and the substrates are arranged on the upper magnetic core and the lower magnetic core. Pins are installed on the two sides of the surface of the base plate and the two sides of the surface of the framework, a self-heat-dissipation mechanism and a fast-assembly mechanism are arranged on the two sides of the inner surface and the two sides of the outer surface of the upper magnetic core and the two sides of the outer surface of the lower magnetic core respectively, and leakage inductance adjusting mechanisms are arranged on the outer surfaces of the pins. Therefore, a cooling fin self-adjusting function with lower cost, a more efficient substrate spacing adjusting function and a more stable assembling function are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformers, in particular to a laminated high-frequency micro transformer. BACKGROUND

[0002] A transformer is a static power conversion device based on electromagnetic induction principle, and its core function is to transform the voltage and current level of alternating current without changing the frequency, and to realize electrical isolation. A high-frequency micro transformer is a spiral planar copper foil trace designed for the primary and secondary windings. By manufacturing multiple layers of PCB substrates, these winding layers are stacked and pressed together, and the layers are connected through vias. It is widely used in modern electronic devices with high frequency, small size and light weight.

[0003] However, the existing transformer has the following disadvantages: The existing transformer mostly uses fixed heat sinks for heat dissipation, which not only limits the heat flow channel, but also lacks the ability to adaptively adjust according to the internal temperature of the transformer, resulting in low heat dissipation efficiency. The distance between the transformer substrates is fixed, and when the distance needs to be increased to fill the thermal conductive glue to improve the heat conduction path, or the leakage inductance needs to be adjusted due to substandard testing, the transformer must be disassembled and replaced with gaskets to adjust the distance between the substrates, which has obvious limitations. The existing transformer is mostly fixed by buckles, which are prone to come off when subjected to severe vibration, and the stability is poor.

[0004] Therefore, we propose a laminated high-frequency micro transformer to solve the above problems. SUMMARY

[0005] The present application aims to provide a laminated high-frequency micro transformer, which realizes lower-cost heat sink self-adjusting function, higher-efficiency substrate spacing adjustment function and more stable assembly function by setting self-heat dissipation mechanism, leakage inductance adjustment mechanism and quick mounting mechanism, to solve the problems in the above background technology.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a laminated high-frequency micro transformer, comprising a transformer body, the transformer body comprising a lower magnetic core, the top end of the lower magnetic core being provided with an upper magnetic core, the inner sides of the upper magnetic core and the lower magnetic core being provided with a framework, the outer surface of the framework being provided with a substrate, the surfaces of the substrate and the framework being provided with pins on both sides, the inner and outer surfaces of the upper magnetic core and the lower magnetic core being provided with self-heat dissipation mechanisms and quick mounting mechanisms on both sides, and the outer surface of the pin being provided with a leakage inductance adjustment mechanism. The self-heat-dissipation mechanism comprises a dustproof net, which is installed on both sides of the outer surfaces of the upper magnetic core and the lower magnetic core; the inner surfaces of the upper magnetic core and the lower magnetic core are provided with heat dissipation fins, and the inner surfaces of the upper magnetic core and the lower magnetic core are provided with grooves; the outer surfaces of the heat dissipation fins are fixedly installed with rotating shafts, which are rotatably connected to the inner sides of the grooves; the top ends of the heat dissipation fins are slidably connected with cover plates; the inner surface of one side of the cover plate is installed with an SMA spiral piece; the outer surface of one side of the SMA spiral piece is fixedly installed with a counterweight; the outer surface of one side of the counterweight is fixedly installed with a return spring; the outer surface of one side of the heat dissipation fin is installed with a heat conduction fin; the top ends of the cover plate and the heat dissipation fin are provided with mounting holes, and the inner sides of the mounting holes are rotatably connected with fixing bolts.

[0007] Preferably, the inner side of the heat dissipation fin is provided with a sliding groove, and the cover plate is slidably connected to the inner side of the sliding groove.

[0008] Preferably, the SMA spiral piece is extruded into a spring shape, and the outer surfaces of the SMA spiral piece and the return spring are respectively in contact with the inner surfaces of the heat dissipation fins; and the counterweight is slidably connected to the inner side of the heat dissipation fin.

[0009] Preferably, the distribution position of the heat conduction fin corresponds to the distribution position of the SMA spiral piece.

[0010] Preferably, the leakage inductance adjusting mechanism comprises an insulating sleeve, which is sleeved on the surface of the pin; the insulating sleeve is made of silicone rubber material; the bottom end of the insulating sleeve is fixedly installed with positioning blocks at four corners; the top end of the substrate is provided with a positioning groove; and the positioning blocks are inserted into the inner side of the positioning groove.

[0011] Preferably, the outer surface of the pin is provided with a moving groove, and the insulating sleeve is slidably connected to the inner side of the moving groove; the surface of the top of the pin is rotatably connected with a knob; and the inner side of the knob and the surface of the top of the pin are provided with threaded grooves.

[0012] Preferably, the quick mounting mechanism comprises a rotating rod, which is rotatably connected to the outer surfaces of the lower magnetic core; the outer surface of the rotating rod is fixedly installed with connecting pieces; the outer surfaces of both sides of the upper magnetic core are provided with arc-shaped grooves; and the outer surfaces of both sides of the connecting pieces are fixedly installed with torsional springs.

[0013] Preferably, the torsional spring is sleeved on the outer surface of the rotating rod; one end of the outer surface of the connecting piece is fixedly installed with an arc-shaped block; the outer surface of the arc-shaped block is fixedly installed with a limiting frame; the arc-shaped block is inserted into the inner side of the arc-shaped groove; and the top end of the upper magnetic core is fixedly installed with a supporting block.

[0014] Preferably, the inner side of the supporting block is fixedly provided with a shaft rod, the outer surface of the shaft rod is rotationally connected with a movable block, the arc-shaped block and the limiting frame are both arc-shaped moving paths, and the outer surface of the movable block is fixedly provided with a clamping block at one end.

[0015] Compared with the prior art, the present application has the following advantages: 1、The self-heat-dissipation mechanism is arranged, the self-adjusting function of the heat dissipation fin with lower cost is realized, when the temperature in the transformer body is too high, the heat is transmitted to the corresponding SMA spiral fin through the heat conduction fin, the SMA spiral fin is shrunk by phase change due to heat, the counterweight block is driven to move by overcoming the elastic force of the return spring, the center of gravity of the heat dissipation fin is shifted and rotation is generated, the heat dissipation surface area can be increased, the air flow channel is optimized, the heat is efficiently discharged, after the temperature is reduced, the SMA spiral fin is softened by phase change, and returns to the original state under the action of the return spring, the counterweight block and the heat dissipation fin are reset, at this time, the heat dissipation fin is closed and cooperates with the dust screen to block dust from entering, without the help of a driver, intelligent adjustment according to the temperature in the transformer body is realized, the heat dissipation efficiency of the transformer body is improved, the use cost is reduced, when the SMA spiral fin is replaced, only the fixing bolt is taken out and the cover plate is pulled out, the SMA spiral fin on the cover plate can be replaced, and the practicality is higher.

[0016] 2、The leakage inductance adjusting mechanism is arranged, higher efficient substrate spacing adjusting function is realized, the framework is arranged on the lower magnetic core, then the substrates are stacked on the framework, the positioning blocks on the insulating sleeves are inserted into the positioning grooves, the substrates are supported through the insulating sleeves, then the pins are inserted through the substrates and the framework, the knob is sleeved on the surface of the pin through the threaded groove, the insulating sleeves are extruded by the knob, since the insulating sleeves are made of elastic silicone rubber material, a plurality of insulating sleeves can share the pressure, so that the spacing of the plurality of substrates remains consistent, during the use of the transformer body, the spacing of the substrates can be adjusted by rotating the knob to extrude the insulating sleeves, the leakage inductance can be adjusted without disassembling the transformer body, the labor cost is reduced and convenience is provided.

[0017] 3、The quick mounting mechanism is arranged, stable assembly function is realized, the connecting piece is rotated first, the arc-shaped block is moved, is inserted into the arc-shaped groove, the arc-shaped block is moved, the limiting frame is slid into the inner side of the supporting block, extrusion is generated to the movable block and makes it rotate, the clamping block limits the movement path of the movable block, after the limiting frame slides into the inner side of the supporting block and reaches the suitable position, the movable block is reset, is combined with the supporting block and the limiting frame, the downward force of the torsional spring is brought to the connecting piece and the arc-shaped block on it and the limiting frame, the arc-shaped block is combined in the arc-shaped groove through the arc-shaped movement path of itself, the movable block forms the limitation to the limiting frame, and the more intense the movement of the limiting frame is, the more the movable block limits it, the arc-shaped block also cannot move, realizes quick assembly, and through double limitation, the violent vibration of the transformer body cannot shake the limiting frame, improves the stability of the transformer body. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a front view structural perspective drawing of a laminated high-frequency micro transformer of the application; Figure 2 It is a split structure perspective drawing of a laminated high-frequency micro transformer of the application; Figure 3 It is a side view structural perspective drawing of the upper magnetic core in a laminated high-frequency micro transformer of the application; Figure 4 It is a side view structural enlarged perspective drawing of the self-heat dissipation mechanism in a laminated high-frequency micro transformer of the application; Figure 5 It is a split structure enlarged perspective drawing of the heat dissipation fin in a laminated high-frequency micro transformer of the application; Figure 6 It is a side view structural perspective drawing of the leakage inductance adjusting mechanism in a laminated high-frequency micro transformer of the application; Figure 7 It is a laminated high-frequency micro transformer of the application Figure 6 It is an enlarged perspective drawing of the structure at A in a laminated high-frequency micro transformer of the application; Figure 8 It is a side view structural perspective drawing of the quick mounting mechanism in a laminated high-frequency micro transformer of the application; Figure 9 It is a split structure enlarged perspective drawing of the supporting block in a laminated high-frequency micro transformer of the application.

[0019] As shown in the figure, 1 is a transformer body; 101 is a lower magnetic core; 102 is an upper magnetic core; 103 is a framework; 104 is a base plate; 105 is a pin; 2 is a self-heat dissipation mechanism; 201 is a dust screen; 202 is a cooling fin; 203 is a groove; 204 is a rotating shaft; 205 is a cover plate; 206 is an SMA spiral piece; 207 is a counterweight; 208 is a return spring; 209 is a heat-conducting piece; 210 is a mounting hole; 211 is a fixing bolt; 3 is a leakage inductance adjusting mechanism; 301 is an insulating sleeve; 302 is a positioning block; 303 is a positioning groove; 304 is a knob; 305 is a threaded groove; 4 is a quick mounting mechanism; 401 is a rotating rod; 402 is a connecting piece; 403 is a torsional spring; 404 is an arc-shaped block; 405 is a limiting frame; 406 is an arc-shaped groove; 407 is a supporting block; 408 is a movable block; 409 is a shaft rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0021] Please refer to the accompanying Figure 1 - the accompanying Figure 9 As shown in the figure, the present application provides a technical solution: a laminated high-frequency micro transformer, comprising a transformer body 1, the transformer body 1 comprises a lower magnetic core 101, the top end of the lower magnetic core 101 is provided with an upper magnetic core 102, the inner side of the upper magnetic core 102 and the lower magnetic core 101 are both provided with a framework 103, the outer surface of the framework 103 is provided with a base plate 104, the surface of the base plate 104 and the framework 103 are both provided with a pin 105, the inner surface and the outer surface of the upper magnetic core 102 and the lower magnetic core 101 are respectively provided with a self-heat dissipation mechanism 2 and a quick mounting mechanism 4, and the outer surface of the pin 105 is provided with a leakage inductance adjusting mechanism 3.

[0022] Embodiment 1, according to Figures 1-5As shown, the heat dissipation mechanism 2 comprises a dust screen 201 mounted on the outer surface of the upper magnetic core 102 and the lower magnetic core 101, the inner surface of the upper magnetic core 102 and the lower magnetic core 101 is provided with a cooling fin 202, and the inner surface of the upper magnetic core 102 and the lower magnetic core 101 is provided with a groove 203, the outer surface of the cooling fin 202 is fixedly installed with a rotating shaft 204, the rotating shaft 204 is rotatably connected to the inner side of the groove 203, the top end of the cooling fin 202 is slidably connected with a cover plate 205, the inner surface of the cover plate 205 is installed with an SMA spiral piece 206 on one side, the outer surface of the SMA spiral piece 206 is fixedly installed with a counterweight 207 on one side, the outer surface of the counterweight 207 is fixedly installed with a return spring 208 on one side, the outer surface of the cooling fin 202 is installed with a heat conduction piece 209 on one side, the top end of the cover plate 205 and the cooling fin 202 is provided with a mounting hole 210, the inner side of the mounting hole 210 is rotatably connected with a fixing bolt 211, the inner side of the cooling fin 202 is provided with a sliding groove, the cover plate 205 is slidably connected to the inner side of the sliding groove, the SMA spiral piece 206 is extruded into a spring shape, and the outer surface of the SMA spiral piece 206 and the return spring 208 is respectively in contact with the inner surface of the cooling fin 202 on the other side, the counterweight 207 is slidably connected to the inner side of the cooling fin 202, and the distribution position of the heat conduction piece 209 corresponds to the distribution position of the SMA spiral piece 206.

[0023] The effect of the whole embodiment 1 is: the self-adjusting function of the cooling fin 202 with lower cost is realized, when the temperature in the transformer body 1 is too high, the heat will be quickly transferred to the corresponding position of the SMA spiral piece 206 through the heat conduction piece 209, the SMA spiral piece 206 will shrink after phase change, overcoming the elastic force of the return spring 208, driving the counterweight 207 to move in the inner side of the cooling fin 202, so that the center of gravity of the cooling fin 202 shifts to the other end, and then drives the cooling fin 202 to rotate, which can increase the heat dissipation surface area and optimize the air flow channel, so as to realize the efficient discharge of heat, after the temperature decreases, the SMA spiral piece 206 softens after phase change, and returns to the original state under the action of the return spring 208, the counterweight 207 and the cooling fin 202 are reset, at this time the cooling fin 202 is closed, and the dust screen 201 blocks the dust from entering, this structure does not need to rely on the driver, and can intelligently adjust according to the internal temperature of the transformer body 1, which not only improves the heat dissipation efficiency of the transformer body 1, but also reduces the use cost, when replacing the SMA spiral piece 206, only need to take down the fixing bolt 211 from the mounting hole 210, and then take out the cover plate 205 from the sliding groove, the SMA spiral piece 206 on the cover plate 205 can be replaced, which has strong practicability.

[0024] Embodiment 2, according to Figure 2 , Figure 6 and Figure 7As shown, the leakage inductance adjusting mechanism 3 comprises an insulating sleeve 301 sleeved on the surface of the pin 105, and the insulating sleeve 301 is made of silicone rubber material, the bottom end of the insulating sleeve 301 is fixedly installed with a positioning block 302 at four corners, the top end of the substrate 104 is provided with a positioning groove 303, the positioning block 302 is inserted into the inner side of the positioning groove 303, the outer surface of the pin 105 is provided with a moving groove, the insulating sleeve 301 is slidingly connected to the inner side of the moving groove, and the surface top of the pin 105 is rotatably connected with a knob 304, and the inner side of the knob 304 and the surface top of the pin 105 are both provided with a threaded groove 305.

[0025] The effect achieved by the whole embodiment 2 is that the higher efficient substrate 104 spacing adjusting function is realized, the skeleton 103 is first sleeved on the lower magnetic core 101, then the substrate 104 is stacked on the skeleton 103, the positioning block 302 on the insulating sleeve 301 is inserted into the positioning groove 303 in alignment, the substrate 104 is supported by the insulating sleeve 301, then the pin 105 passes through the substrate 104 and the skeleton 103, and the knob 304 is sleeved on the surface of the pin 105 through the threaded groove 305, the insulating sleeve 301 is extruded by the knob 304, since the insulating sleeve 301 is made of elastic silicone rubber material, a plurality of insulating sleeves 301 can share the pressure, so that the spacing of the plurality of substrates 104 remains consistent, and in the same way, in the use process of the transformer body 1, the spacing of the substrate 104 can also be adjusted by rotating the knob 304 to extrude the insulating sleeve 301, without disassembling the transformer body 1, the leakage inductance adjusting can be completed, the labor cost is reduced, and the use of the transformer body 1 is facilitated.

[0026] In embodiment 3, according to Figure 2 、 Figure 8 and Figure 9 As shown, the quick mounting mechanism 4 comprises a rotating rod 401 rotatably connected to the outer surface of the lower magnetic core 101 on both sides, and the outer surface of the rotating rod 401 is fixedly installed with a connecting piece 402, the outer surface of the upper magnetic core 102 on both sides is provided with an arc-shaped groove 406, the outer surface of the connecting piece 402 on both sides is fixedly installed with a torsional spring 403, the torsional spring 403 is sleeved on the outer surface of the rotating rod 401, the outer surface of the connecting piece 402 is fixedly installed with an arc-shaped block 404 at one end, the outer surface of the arc-shaped block 404 is fixedly installed with a limiting frame 405, the arc-shaped block 404 is inserted into the inner side of the arc-shaped groove 406, the top end of the upper magnetic core 102 is fixedly installed with a supporting block 407, the inner side of the supporting block 407 is fixedly installed with a shaft rod 409, the outer surface of the shaft rod 409 is rotatably connected with a movable block 408, the arc-shaped block 404 and the limiting frame 405 are both arc-shaped moving paths, and the outer surface of the movable block 408 is fixedly installed with a clamping block at one end.

[0027] The effect achieved by the whole embodiment 3 is: a more stable assembly function is realized, the connecting sheet 402 is first rotated to drive the arc-shaped block 404 to move to be inserted into the arc-shaped slot 406, while the arc-shaped block 404 moves, the limiting frame 405 will be slid into the inside of the supporting block 407 to extrude the movable block 408 and make it rotate, and the clamping block will limit the movement path of the movable block 408, after the limiting frame 405 is slid into the inside of the supporting block 407 to the appropriate position, the movable block 408 is reset to be clamped with the supporting block 407 to limit the limiting frame 405, at this time, the continuous downward force of the torsional spring 403 will drive the connecting sheet 402 and the arc-shaped block 404 thereon and the limiting frame 405 to move backward, the arc-shaped block 404 is clamped in the arc-shaped slot 406 through the arc-shaped movement path of itself, the movable block 408 limits the limiting frame 405, and the more intense the movement of the limiting frame 405 is, the tighter the limitation of the movable block 408 to it is, and the arc-shaped block 404 also cannot move, this structure realizes the rapid assembly, at the same time, through the double limiting action, the violent vibration of the transformer body 1 cannot shake the limiting frame 405, and the stability of the transformer body 1 is effectively improved.

[0028] The working principle of the whole device is: during the assembly of the transformer, first, the skeleton 103 is sleeved on the lower magnetic core 101, then the base plate 104 is stacked on the skeleton 103, and the positioning block 302 on the insulating sleeve 301 is inserted into the positioning groove 303 to support the base plates 104 through the insulating sleeve 301, then the pin 105 is inserted through the base plate 104 and the skeleton 103, and the knob 304 is sleeved on the surface of the pin 105 through the threaded groove 305, so that the knob 304 extrudes the insulating sleeve 301. Because the silicone rubber material of the insulating sleeve 301 has elasticity, multiple insulating sleeves 301 can share the pressure, so that the spacing of multiple base plates 104 is consistent. Similarly, during the use of the transformer body 1, the spacing of the base plates 104 can also be adjusted by rotating the knob 304 to extrude the insulating sleeve 301. Without disassembling the transformer body 1, the leakage inductance can be adjusted, the labor cost is reduced, the use of the transformer body 1 is facilitated, then the upper magnetic core 102 is sleeved on the lower magnetic core 101, and the connecting piece 402 is rotated to drive the arc-shaped block 404 to move, so that the arc-shaped block 404 is inserted into the arc-shaped groove 406. The movement of the arc-shaped block 404 drives the limiting frame 405 to slide into the inside of the supporting block 407, extrudes the movable block 408 to rotate, and limits the movement path of the movable block 408 through the clamping block. After the limiting frame 405 slides into the inside of the supporting block 407 to the appropriate position, the movable block 408 is reset to be clamped with the supporting block 407 to limit the limiting frame 405. At this time, the force of the torsional spring 403 always downward drives the connecting piece 402 and the arc-shaped block 404 and the limiting frame 405 to move backward. The arc-shaped movement path of the arc-shaped block 404 makes it clamped in the arc-shaped groove 406, while the limiting frame 405 moves more violently, the movable block 408 limits it more tightly, and the arc-shaped block 404 cannot move. While achieving rapid assembly, the violent vibration of the transformer body 1 cannot shake the limiting frame 405 through double limiting, which improves the stability of the transformer body 1. When the temperature in the transformer body 1 is too high, the heat is quickly transferred to the SMA spiral piece 206 corresponding to the distribution position of the heat conduction piece 209, the SMA spiral piece 206 shrinks after phase change, the SMA spiral piece 206 overcomes the elastic force of the reset spring 208 to drive the counterweight block 207 to move inside the heat sink 202, and the counterweight block 207 moves to shift the center of gravity of the heat sink 202 to the other end. Then the movement of the counterweight block 207 drives the heat sink 202 to rotate, increases the heat dissipation surface area of the heat sink 202, optimizes the air flow channel, and realizes the best heat discharge state. After the temperature decreases, the SMA spiral piece 206 softens after phase change, and the SMA spiral piece 206 is reset by the reset of the reset spring 208 to restore the original state. The counterweight block 207 and the heat sink 202 move back to the original position, and the heat sink 202 is closed to block the entry of dust through the dust screen 201.Make the fin 202 in the premise of not with the help of driver, can according to the temperature inside transformer body 1 intelligent adjustment, improve the heat dissipation efficiency of transformer body 1, reduce the use cost, when replacing SMA helical sheet 206, can be fixed bolt 211 from mounting hole 210, and the cover plate 205 is taken off from the slide groove, can replace the SMA helical sheet 206 on the cover plate 205, higher practicality.

[0029] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that modifications can be made to the technology solutions recorded in the foregoing embodiments, or equivalent replacements can be made to part of the technical features, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A laminated high-frequency micro transformer comprising a transformer body (1), characterized in that: The transformer body (1) includes a lower magnetic core (101), the top end of the lower magnetic core (101) is provided with an upper magnetic core (102), the inner side of the upper magnetic core (102) and the lower magnetic core (101) are both provided with a framework (103), the outer surface of the framework (103) is provided with a base plate (104), the surface of the base plate (104) and the framework (103) is both provided with a pin (105), the inner surface and the outer surface of the upper magnetic core (102) and the lower magnetic core (101) are respectively provided with a self-heat dissipation mechanism (2) and a quick mounting mechanism (4), and the outer surface of the pin (105) is provided with a leakage inductance adjusting mechanism (3). The self-heat dissipation mechanism (2) includes a dustproof net (201), the dustproof net (201) is installed on the outer surface of the upper magnetic core (102) and the lower magnetic core (101), the inner surface of the upper magnetic core (102) and the lower magnetic core (101) is both provided with a cooling fin (202), and the inner surface of the upper magnetic core (102) and the lower magnetic core (101) is both provided with a groove (203), the outer surface of the cooling fin (202) is both fixedly provided with a rotating shaft (204), the rotating shaft (204) is rotatably connected to the inner side of the groove (203), the top end of the cooling fin (202) is slidably connected with a cover plate (205), one side of the inner surface of the cover plate (205) is provided with an SMA spiral piece (206), one side of the outer surface of the SMA spiral piece (206) is fixedly provided with a counterweight (207), one side of the outer surface of the counterweight (207) is fixedly provided with a return spring (208), one side of the outer surface of the cooling fin (202) is provided with a heat conduction piece (209), and the top end of the cover plate (205) and the cooling fin (202) is both provided with a mounting hole (210), and the inner side of the mounting hole (210) is rotatably connected with a fixing bolt (211).

2. The stacked high-frequency micro transformer according to claim 1, characterized by: The inner side of the cooling fin (202) is provided with a sliding groove, and the cover plate (205) is slidably connected to the inner side of the sliding groove.

3. The stacked high-frequency micro transformer according to claim 1, characterized by: The SMA spiral piece (206) is extruded into a spring shape, and the outer surface of the SMA spiral piece (206) and the return spring (208) is respectively in contact with the inner surface of the cooling fin (202) on the other side, and the counterweight (207) is slidably connected to the inner side of the cooling fin (202).

4. The stacked high-frequency micro transformer according to claim 1, wherein: The distribution position of the heat conduction piece (209) corresponds to the distribution position of the SMA spiral piece (206).

5. The stacked high-frequency micro transformer according to claim 1, characterized by: The leakage inductance adjusting mechanism (3) includes an insulating sleeve (301), the insulating sleeve (301) is provided on the surface of the pin (105), and the insulating sleeve (301) is made of silicone rubber material, the bottom end of the insulating sleeve (301) is fixedly provided with a positioning block (302), the top end of the base plate (104) is provided with a positioning groove (303), and the positioning block (302) is inserted into the inner side of the positioning groove (303).

6. The stacked high-frequency micro transformer according to claim 5, characterized by: The outer surface of the pin (105) is provided with a moving groove, the insulating sleeve (301) is slidingly connected to the inner side of the moving groove, the surface top of the pin (105) is rotationally connected with a knob (304), and the inner side of the knob (304) and the surface top of the pin (105) are both provided with a threaded groove (305).

7. The stacked high-frequency micro transformer according to claim 1, wherein: The quick mounting mechanism (4) comprises a rotating rod (401), the rotating rod (401) is rotationally connected to the outer surface of the lower magnetic core (101), and the outer surface of the rotating rod (401) is fixedly installed with a connecting plate (402); the outer surface of the upper magnetic core (102) is provided with an arc-shaped groove (406) on both sides; and the outer surface of the connecting plate (402) is fixedly installed with a torsional spring (403) on both sides.

8. The stacked high-frequency micro transformer according to claim 7, characterized by: The torsional spring (403) is sleeved on the outer surface of the rotating rod (401), one end of the outer surface of the connecting plate (402) is fixedly installed with an arc-shaped block (404), the outer surface of the arc-shaped block (404) is fixedly installed with a limiting frame (405), the arc-shaped block (404) is inserted into the inner side of the arc-shaped groove (406), and the top end of the upper magnetic core (102) is fixedly installed with a supporting block (407).

9. The stacked high-frequency micro transformer according to claim 8, characterized by: The inner side of the supporting block (407) is fixedly installed with a shaft rod (409), the outer surface of the shaft rod (409) is rotationally connected with a movable block (408), the arc-shaped block (404) and the limiting frame (405) are both arc-shaped moving paths, and one end of the outer surface of the movable block (408) is fixedly installed with a clamping block.

Images