Switching power supply transformer with shielding function

Abstract

The utility model discloses a switching power supply transformer with a shielding function, which comprises a transformer main body, a main shell, a shielding layer, a bottom boss and pins, the transformer main body is mounted in the main shell, the shielding layer is wound outside the transformer main body in the main shell, the bottom of the main shell protrudes to form the bottom boss, the pins are fixed at the bottom boss, and the shielding layer is wound outside the bottom boss. The switch power supply transformer further comprises a preassembling seat, the preassembling seat is arranged at the position of the main shell of the transformer body, the preassembling seat can be installed at the position of the switch power supply circuit board in a tin soldering mode, and then the main shell and the pins of the switch power supply transformer can be installed at the preassembling seat in a clamping mode to be connected with the switch power supply circuit board. The switching power supply transformer can be directly pulled out and replaced from the preassembled seat during disassembly, so that the switching power supply transformer can be installed at the switching power supply circuit board without tin soldering, and the convenience of disassembly, assembly and maintenance of the switching power supply transformer at the switching power supply circuit board is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of switching power supply transformers, in particular to a switching power supply transformer with a shielding function. Background Art

[0002] The switching power transformer is a power transformer with a switch tube added. In addition to the voltage conversion function of an ordinary transformer in the circuit, it also has insulation isolation and power transmission functions. It is generally used in occasions involving high-frequency circuits such as switching power supplies. The switching power transformer and the switch tube together constitute a self-excited (or externally excited) intermittent oscillator, thereby modulating the input DC voltage into a high-frequency pulse voltage. It plays a role in energy transfer and conversion. In the flyback circuit, when the switch tube is turned on, the transformer converts electrical energy into magnetic field energy and stores it, and releases it when the switch tube is turned off. In the forward circuit, when the switch tube is turned on, the input voltage is directly supplied to the load and the energy is stored in the energy storage inductor. When the switch tube is turned off, the energy storage inductor is used to transfer the energy to the load. After the shielding layer is wrapped around the main surface of the switching power transformer, the switching power transformer has a shielding function.

[0003] The switching power supply transformer in the prior art has a shielding function by wrapping a shielding layer around its main body. When such a switching power supply transformer is installed on the surface of a switching power supply circuit board, its pins are usually fixed by soldering. When the switching power supply transformer fails and needs to be replaced, technicians usually need to heat the soldering pins of the switching power supply transformer on the circuit board to disassemble the switching power supply transformer, and the new switching power supply transformer also needs to be re-soldered on the circuit board, which makes the switching power supply transformer inconvenient during disassembly and maintenance. For this reason, we propose a switching power supply transformer with a shielding function. Utility Model Content

[0004] The main purpose of the utility model is to provide a switching power supply transformer with a shielding function, wherein a pre-installed seat is arranged at the main shell of the transformer body, and the pre-installed seat can be installed by soldering at the switching power supply circuit board, and then the main shell and pins of the switching power supply transformer can be installed at the pre-installed seat in a card-mounted manner and connected to the switching power supply circuit board, and the switching power supply transformer can be directly removed and replaced from the pre-installed seat when disassembling, so that the switching power supply transformer does not need to be installed by soldering at the switching power supply circuit board, thereby ensuring the convenience of disassembly, assembly and maintenance of the switching power supply transformer at the switching power supply circuit board; and after the switching power supply transformer is not fixed by soldering at the switching power supply circuit board, when the switching power supply transformer fails to be replaced at the switching power supply circuit board, it is not necessary to heat the soldering holes at the switching power supply circuit board, thereby avoiding thermal damage to the switching power supply circuit board when the switching power supply transformer is repaired and replaced, and effectively solving the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A switching power supply transformer with a shielding function comprises a transformer main body shell, a shielding layer, a bottom boss and pins, wherein the transformer main body is installed in the main shell, and the shielding layer is wrapped around the outside of the transformer main body in the main shell, the bottom of the main shell is convex with a bottom boss, and the bottom boss is fixed with pins, and also comprises a pre-installed seat, the pre-installed seat comprises a U-shaped seat plate, an embedded tube, an inner convex ring, a main abutment plate, a triangular pressure block and a support abutment plate, the main shell is pressed on the surface of the U-shaped seat plate, and the surface of the U-shaped seat plate is concave and has a concave groove for clamping the bottom boss, An embedded tube extending downwardly from the U-shaped seat plate is fixed at the groove wall of the concave platform groove, and a pin is inserted into the tube body of the embedded tube, and an inner convex ring for contacting the pin is protruded at the inner tube wall of the embedded tube, a main abutment plate is integrally formed on the surface of the central plate body of the U-shaped seat plate, and supporting abutment plates are symmetrically protruded outside the double sets of short plates of the U-shaped seat plate away from the main abutment plate, the main abutment plate and the supporting abutment plates are symmetrically pressed against the outside of the main shell, and a fixed groove is provided at the top of the main shell on one side of the main abutment plate, and a triangular pressure block for snapping into the fixed groove is protruded on the surface of the vertical plate body of the main abutment plate.

[0007] Furthermore, the support plate and the back plate surface of the main support plate away from the main shell are integrally formed with ribs;

[0008] By adopting the above technical solution, ribs are arranged at the support plate and the main support plate to reinforce the structure.

[0009] Furthermore, the inner tube wall of the embedded tube close to its own tube opening is convexly provided with an inner convex ring, and a pin passes through the middle of the inner convex ring;

[0010] By adopting the above technical solution, the convex ring is arranged close to the tube opening of the embedded tube, so that the pins can be firmly clamped and restricted in the embedded tube by the inner convex ring.

[0011] Furthermore, the rectangular block below the triangular pressure block is inserted into the rectangular groove cavity of the fixed groove;

[0012] By adopting the above technical solution, the triangular pressing block is clamped in the fixed groove with a rectangular block body to press the main shell against the U-shaped seat plate.

[0013] Furthermore, the two sets of plate bodies of the main abutment plate and the supporting abutment plate are fixed on the surface of the U-shaped seat plate in a triangular shape, and the plate bodies of the main abutment plate and the supporting abutment plate are elastic plastic plate bodies;

[0014] By adopting the above technical solution, the main abutment plate and the supporting abutment plate fixed in a triangular distribution on the U-shaped seat plate can clamp the main shell at three points, and the main abutment plate and the supporting abutment plate can be slightly bent outward to facilitate the main shell to be inserted between the main abutment plate and the supporting abutment plate.

[0015] Furthermore, the tube body of the embedded tube is a single-port tube body, and the tube lumen length of the embedded tube is the same as the rod length of the pin;

[0016] By adopting the above technical solution, the single-port tube body of the embedded tube can be adapted to be connected by inserting the pins.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model provides a pre-installed seat at the main shell of the transformer body, and the pre-installed seat can be installed by soldering at the switching power supply circuit board. Then the main shell and pins of the switching power supply transformer can be installed at the pre-installed seat in a card-mounted manner and connected to the switching power supply circuit board. When the switching power supply transformer is disassembled, it can be directly removed and replaced from the pre-installed seat, so that the switching power supply transformer does not need to be installed by soldering at the switching power supply circuit board, thereby ensuring the convenience of disassembly, assembly and maintenance of the switching power supply transformer at the switching power supply circuit board.

[0019] In addition, after the switching power supply transformer is fixed on the switching power supply circuit board without soldering, when the switching power supply transformer fails to be replaced on the switching power supply circuit board, there is no need to heat the soldering holes on the switching power supply circuit board, thereby avoiding thermal damage to the switching power supply circuit board when the switching power supply transformer is repaired and replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a schematic diagram of the overall structure of a switching power supply transformer with shielding function.

[0021] Figure 2 This is an exploded view of a pre-installed seat of a switching power supply transformer with a shielding function according to the utility model.

[0022] Figure 3 The utility model is a schematic diagram of an embedded tube structure of a switching power supply transformer with a shielding function.

[0023] In the figure: 1. transformer body; 2. main shell; 3. shielding layer; 4. bottom boss; 5. pin; 6. pre-installed seat; 7. U-shaped seat plate; 8. concave groove; 9. embedded tube; 10. inner convex ring; 11. main abutment plate; 12. fixed groove; 13. triangular pressure block; 14. support plate; 15. rib. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] like Figure 1-3As shown, a switching power supply transformer with a shielding function includes a transformer body 1, a main shell 2, a shielding layer 3, a bottom boss 4 and a pin 5. The transformer body 1 is installed in the main shell 2, and the shielding layer 3 is wrapped around the outside of the transformer body 1 in the main shell 2. The bottom of the main shell 2 is protruded with a bottom boss 4, and the pin 5 is fixed at the bottom boss 4. It also includes a pre-installed seat 6, and the pre-installed seat 6 includes a U-shaped seat plate 7, an embedded tube 9, an inner convex ring 10, a main abutment plate 11, a triangular pressure block 13 and a support plate 14. The main shell 2 is pressed on the surface of the U-shaped seat plate 7, and the surface of the U-shaped seat plate 7 is concave and has a concave groove 8 for clamping the bottom boss 4. An embedded tube 9 extending downward from the U-shaped seat plate 7 is fixed on the groove wall of the concave platform groove 8, and a pin 5 is inserted into the tube body of the embedded tube 9. An inner convex ring 10 for contacting the pin 5 is protruded on the inner tube wall of the embedded tube 9. A main abutment plate 11 is integrally formed on the central plate surface of the U-shaped seat plate 7, and a supporting abutment plate 14 is symmetrically protruded outside the double group of short plates of the U-shaped seat plate 7 away from the main abutment plate 11. The main abutment plate 11 and the supporting abutment plate 14 are symmetrically pressed against the outside of the main shell 2, and a fixed groove 12 is opened on the top of the main shell 2 on one side of the main abutment plate 11, and a triangular pressure block 13 for snapping into the fixed groove 12 is protruded on the surface of the vertical plate body of the main abutment plate 11.

[0026] The support plate 14 and the back plate surface of the main support plate 11 away from the main shell 2 are integrally formed with ribs 15;

[0027] By adopting the above technical solution, ribs 15 are provided at the support plate 14 and the main support plate 11 for structural reinforcement.

[0028] The inner tube wall of the embedded tube 9 near its own tube opening is convexly provided with an inner convex ring 10, and a pin 5 passes through the middle of the inner convex ring 10;

[0029] By adopting the above technical solution, the convex ring 10 is arranged close to the tube opening of the embedded tube 9 , so that the pin 5 can be firmly clamped and restricted in the embedded tube 9 by the inner convex ring 10 .

[0030] The rectangular block below the triangular pressure block 13 is inserted into the rectangular groove cavity of the fixed groove 12;

[0031] By adopting the above technical solution, the triangular pressing block 13 is clamped in the fixed groove 12 with a rectangular block to press the main shell 2 against the U-shaped seat plate 7.

[0032] The two sets of plates of the main abutment plate 11 and the supporting abutment plate 14 are fixed on the surface of the U-shaped seat plate 7 in a triangular shape, and the plates of the main abutment plate 11 and the supporting abutment plate 14 are elastic plastic plates;

[0033] By adopting the above technical solution, the main abutment plate 11 and the support abutment plate 14 fixed in a triangular distribution on the U-shaped seat plate 7 can clamp the main shell 2 at three points, and the main abutment plate 11 and the support abutment plate 14 can be slightly bent outward to facilitate the main shell 2 to be inserted between the main abutment plate 11 and the support abutment plate 14.

[0034] The tube body of the embedded tube 9 is a single-port tube body, and the tube lumen length of the embedded tube 9 is the same as the rod length of the pin 5;

[0035] By adopting the above technical solution, the single-port tube body of the embedded tube 9 can be adapted to be inserted into the pin 5 for connection.

[0036] It should be noted that the utility model is a switching power supply transformer with a shielding function. After a pre-installed seat 6 is set at the main shell 2 of the transformer body 1, the embedded tube 9 of the pre-installed seat 6 can be inserted at the position where the transformer is installed on the surface of the switching power supply circuit board, and then the embedded tube 9 can be soldered at the switching power supply circuit board, so that the U-shaped seat plate 7 is pressed on the surface of the switching power supply circuit board to complete the pre-installation of the pre-installed seat 6, and then the transformer body 1 wrapped with the shielding layer 3 can be placed on the surface of the U-shaped seat plate 7 while pressing the main shell 2, and the bottom boss 4 under the main shell 2 is clamped in the concave groove 8 on the surface of the U-shaped seat plate 7, and then the pin 5 can be inserted into the embedded tube 9 with an inner convex ring 10 for connection. At this time, the main shell 2 is fixed by the triangular distribution on the surface of the U-shaped seat plate 7. The abutment plate 11 and the supporting abutment plate 14 are stuck, and the triangular pressure block 13 of the main abutment plate 11 is pressed into the fixed groove 12 on the surface of the main shell 2 for clamping and positioning. At this time, the main shell 2 of the transformer main body 1 is assembled with the switching power supply circuit board at the U-shaped seat plate 7 of the pre-installed seat 6. When the transformer main body 1 fails and needs to be replaced, the main abutment plate 11 can be slightly bent outward to make the triangular pressure block 13 leave the fixed groove 12, and then the main shell 2 can be pulled out from between the main abutment plate 11 and the supporting abutment plate 14, and a new switching power supply transformer can be taken, and the main shell 2 can be reinstalled on the pre-installed seat 6 according to the above steps, so that the switching power supply transformer does not need to be installed at the switching power supply circuit board without soldering, thereby ensuring the convenience of disassembly, assembly and maintenance of the switching power supply transformer at the switching power supply circuit board.

[0037] It should be noted that the utility model is a switching power supply transformer with a shielding function. The components in the utility model are all components known to technical personnel in the field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0038] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A switching power supply transformer with a shielding function, comprising a transformer body (1), a main shell (2), a shielding layer (3), a bottom boss (4) and a pin (5), wherein the transformer body (1) is installed in the main shell (2), and the shielding layer (3) is wound around the outside of the transformer body (1) in the main shell (2), a bottom boss (4) is protruded from the bottom of the main shell (2), and a pin (5) is fixed at the bottom boss (4), characterized in that: The invention also comprises a pre-installed seat (6), wherein the pre-installed seat (6) comprises a U-shaped seat plate (7), an embedded tube (9), an inner convex ring (10), a main abutment plate (11), a triangular pressure block (13) and a support abutment plate (14); the main shell (2) is pressed on the surface of the U-shaped seat plate (7); and the surface of the U-shaped seat plate (7) is concavely provided with a concave platform groove (8) for clamping the bottom convex platform (4); an embedded tube (9) extending downward from the U-shaped seat plate (7) is fixed on the groove wall of the concave platform groove (8); and a pin (5) is inserted into the tube body of the embedded tube (9); and the inner tube wall of the embedded tube (9) is provided with a protruding bottom convex platform (4). The protrusion is provided with an inner protruding ring (10) for locking the contact pin (5), the surface of the central plate body of the U-shaped seat plate (7) is integrally formed with a main abutment plate (11), and the double group of short plates of the U-shaped seat plate (7) away from the main abutment plate (11) are symmetrically protruded with supporting plates (14), the main abutment plate (11) and the supporting plates (14) are symmetrically pressed against the outside of the main shell (2), and a fixed groove (12) is opened on the top of the main shell (2) on one side of the main abutment plate (11), and a triangular pressure block (13) for locking into the fixed groove (12) is protruded on the surface of the vertical plate body of the main abutment plate (11).

2. The switching power supply transformer with shielding function according to claim 1, characterized in that: The support plate (14) and the back plate surface of the main support plate (11) away from the main shell (2) are integrally formed with ribs (15).

3. The switching power supply transformer with shielding function according to claim 1, characterized in that: An inner convex ring (10) is protruded from the inner tube wall of the embedded tube (9) near its own tube opening, and a pin (5) passes through the middle of the inner convex ring (10).

4. The switching power supply transformer with shielding function according to claim 1, characterized in that: The rectangular block below the triangular pressing block (13) is inserted into the rectangular groove cavity of the fixed groove (12).

5. The switching power supply transformer with shielding function according to claim 1, characterized in that: The two groups of plate bodies of the main abutment plate (11) and the supporting abutment plate (14) are fixed on the surface of the U-shaped seat plate (7) in a triangular manner, and the plate bodies of the main abutment plate (11) and the supporting abutment plate (14) are elastic plastic plate bodies.

6. The switching power supply transformer with shielding function according to claim 1, characterized in that: The tube body of the embedded tube (9) is a single-port tube body, and the tube cavity length of the embedded tube (9) is the same as the rod length of the needle (5).

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