Quickly-assembled small-sized transformer

Abstract

The utility model discloses a fast-assembly type small transformer which comprises a framework, a coil wound on the framework, a magnetic core piece installed on the framework and pins arranged on the framework and connected with the coil, and the magnetic core piece is provided with a mandrel part which can be inserted into the framework and is located in the center of the coil. The two magnetic core pieces are symmetrically installed on the framework in a buckled mode, and the two magnetic core pieces are fixedly connected through a plurality of elastic clamping pins. The coil is wound on the framework, the core shaft part of the magnetic core piece is inserted into the center of the coil, so that the coil meets an electromagnetic induction structure, the coil and the core shaft part are separated through the framework, the insulation purpose is achieved, the heat dissipation effect is well improved, the structure is high in mechanical stability, and the long service life can be ensured. The two magnetic core pieces are buckled together through the elastic clamping pin, the installation efficiency is greatly improved, assembly is easier and more convenient, welding is not needed, and the assembly stability is better.

Description

Technical field:

[0001] The utility model relates to the technical field of transformers, in particular to a quick-install small transformer. Background technology:

[0002] A small transformer is an electrical device that converts one voltage to another voltage through the principle of electromagnetic induction. It is widely used in electronic equipment, lighting systems, communication equipment, and household appliances. Its basic structure includes two or more windings and a magnetic core. The windings are usually divided into primary windings and secondary windings. When the alternating current passes through the primary winding, the alternating magnetic field generated forms an alternating magnetic flux in the core, which induces an electromotive force in the secondary winding, thereby realizing voltage conversion. The voltage change of the transformer is proportional to the turns ratio of the primary and secondary windings, that is, by adjusting the turns ratio, high-voltage alternating current can be converted into low-voltage direct current, or low-voltage electricity can be converted into high-voltage electricity. The functions of small transformers are not limited to voltage conversion, but also include power transmission and signal coupling to ensure the stable operation of various electronic equipment and systems. Its compact structure, high efficiency, and strong reliability make it an indispensable core component in modern electrical and electronic applications.

[0003] The utility model patent with Chinese patent application number 201921882360.3 discloses a transformer structure, which is the same as the traditional transformers on the market, including a shell 1, an iron core 2, a terminal block 3, a pin 4, etc. However, the transformers on the market, because the iron core 2 is completely installed inside the shell 3, and the coil is directly wound on the outside of the iron core 2, not only there are insulation problems and safety hazards, but also the heat dissipation will be affected, and there are also mechanical stability problems after installation.

[0004] In view of this, the inventor proposes the following technical solution. Utility model content:

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a quick-install small transformer.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a quick-install small transformer, comprising: a skeleton, a coil wound on the skeleton, a magnetic core piece installed on the skeleton, and pins arranged on the skeleton and connected to the coil, wherein the magnetic core piece is provided with a core shaft portion that can be inserted into the skeleton and located at the center of the coil, two magnetic core pieces are provided and symmetrically buckled and installed on the skeleton, and the two magnetic core pieces are fixedly connected by multiple elastic pins.

[0007] Furthermore, in the above technical solution, the elastic latch includes a central axis portion and a first elastic arm and a second elastic arm provided at both ends of the central axis portion and capable of being elastically inserted into the magnetic core piece, and at least one first latching hole for inserting the first elastic arm and the second elastic arm is provided on the opposite end surfaces of the magnetic core piece.

[0008] Furthermore, in the above technical solution, four first elastic arms and second elastic arms are respectively provided at both ends of the central axis portion and are symmetrically distributed in a matrix, and can be folded, inserted and clamped when in contact with the first clamping hole.

[0009] Furthermore, in the above technical solution, the middle parts of the first elastic arm and the second elastic arm protrude from the outer wall of the central axis, and the ends of the first elastic arm and the second elastic arm are located inside the outer wall of the central axis, so that the outer walls of the first elastic arm and the second elastic arm form a first transition cone surface and a second transition cone surface with an angle of 120°.

[0010] Furthermore, in the above technical solution, a first gap is formed between the four first elastic arms for them to be embraced and narrowed, and the first gap is in a cross shape; a second gap is formed between the four second elastic arms for them to be embraced and narrowed, and the second gap is in a cross shape.

[0011] Furthermore, in the above technical solution, the elastic latch is made of plastic.

[0012] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art: the utility model adopts the method of winding the coil on the frame, and inserting the core shaft part of the magnetic core into the center of the coil to make it meet the electromagnetic induction structure, and at this time the coil is not directly wound on the core shaft part, but wound on the frame, which not only achieves the purpose of insulation, but also improves the heat dissipation effect, and this structure is mechanically stable and can ensure a long service life. Secondly, the two magnetic core parts are buckled together with an elastic bayonet, which not only greatly improves the installation efficiency and makes the assembly simpler and more portable, but also does not require welding, and the assembly stability is better. Description of the drawings:

[0013] Figure 1 It is a three-dimensional diagram of the utility model;

[0014] Figure 2 It is an exploded view of the utility model;

[0015] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0016] Figure 4 It is a three-dimensional diagram of the elastic bayonet in the utility model;

[0017] Figure 5It is a three-dimensional diagram of the skeleton in the utility model;

[0018] Figure 6 It is the three-dimensional structure of the magnetic core member in the utility model;

[0019] Figure 7 It is a three-dimensional diagram of the pins in the utility model. Specific implementation method:

[0020] The utility model is further described below in conjunction with specific embodiments and drawings.

[0021] See Figures 1 to 7 As shown, a quick-install small transformer includes: a skeleton 1, a coil 2 wound on the skeleton 1, a magnetic core 3 installed on the skeleton 1, and a pin 4 arranged on the skeleton 1 and connected to the coil 2, wherein the magnetic core 3 is provided with a core shaft portion 31 that can be inserted into the skeleton 1 and located at the center of the coil 2, and the magnetic core 3 is provided with two and symmetrically buckled and installed on the skeleton 1, and the two magnetic cores 3 are fixedly connected by multiple elastic bayonet pins 5. The coil 2 is wound on the skeleton 1, and the core shaft portion 31 of the magnetic core 3 is inserted into the center of the coil 2 to meet the electromagnetic induction structure. At this time, the coil 2 is not directly wound on the core shaft portion 31, but is wound on the skeleton 1, which not only achieves the purpose of insulation, but also has a good improvement in the heat dissipation effect. Moreover, this structure has strong mechanical stability and can ensure a long service life. Secondly, the two magnetic cores 3 are buckled together by the elastic bayonet pin 5, which not only greatly improves the installation efficiency and makes the assembly simpler and more portable, but also does not require welding, and the assembly stability is better.

[0022] The elastic bayonet 5 includes a central axis 51 and a first elastic arm 52 and a second elastic arm 53 provided at both ends of the central axis 51 and capable of being elastically inserted into the magnetic core 3. At least one first locking hole 32 for inserting the first elastic arm 52 and the second elastic arm 53 is provided on the opposite end surfaces of the magnetic core 3. The elastic bayonet 5 is provided with a double-head locking structure, and the first elastic arm 52 and the second elastic arm 53 at both ends of the central axis 51 are respectively inserted into the first locking holes 32 of the two magnetic cores 3, so that the two magnetic cores 3 are assembled together.

[0023] Four first elastic arms 52 and second elastic arms 53 are respectively provided at both ends of the middle axis 51, and are symmetrically distributed in a matrix, so that they can be folded and inserted into the first clamping hole 32 after contacting the first clamping hole 32. By providing four first elastic arms 52 and second elastic arms 53 respectively and symmetrically distributed at both ends of the middle axis 51, two structures similar to explosive screws are formed at both ends of the elastic clamping pin 5. After the two ends of the elastic clamping pin 5 are respectively inserted into the first clamping holes 32 of the two magnetic core pieces 3, the first elastic arms 52 and the second elastic arms 53 will be elastically clamped with the inner wall of the first clamping hole 32, so that the two magnetic core pieces 33 can be symmetrically fastened together, and then tightly fixed on the frame 1. Of course, in order to increase the stability of the connection between the magnetic core component 3 and the elastic latch 5, a threaded groove or a latching groove can be added on the inner wall of the first latching hole 32 to increase the friction between the first elastic arm 52 and the second elastic arm 53 and the first latching hole 32, and a barbed latching structure can be formed under the elastic force of the first elastic force arm 52 and the second elastic force arm 53 to achieve a stable connection between the magnetic core component 3 and the elastic latch 5.

[0024] The middle parts of the first elastic arm 52 and the second elastic arm 53 protrude from the outer wall of the middle axis 51, and the ends of the first elastic arm 52 and the second elastic arm 53 are located inside the outer wall of the middle axis 51, so that the outer walls of the first elastic arm 52 and the second elastic arm 53 form a first transition cone 54 and a second transition cone 55 with an angle of 120°. A first gap 56 is formed between the four first elastic arms 52 for embracing each other and shrinking, and the first gap 56 is in a "cross" shape; a second gap 57 is formed between the four second elastic arms 53 for embracing each other and shrinking, and the second gap 57 is in a "cross" shape. The elastic bayonet 5 is made of plastic. In one embodiment, four elastic bayonet pins 5 are used to connect the two magnetic core pieces 3, and the four elastic bayonet pins 5 are located at the four corners of the magnetic core piece 3 to ensure the stability of the magnetic core piece 3 when docked and fastened.

[0025] In one embodiment, the skeleton 1 includes a sleeve 11 in the middle for winding the coil 2 and a first terminal portion 12 and a second terminal portion 13 formed at both ends of the sleeve 11 and used to install the pin 4. The lead 21 of the coil 2 extends out from both ends of the sleeve 11 and is wound around the pin 4, and the pin 4 is provided with a spiral groove 41 for facilitating the winding and welding of the lead 21.

[0026] The first terminal portion 12 and the second terminal portion 13 are symmetrically located at two ends of one side of the sleeve 11, and the end of the sleeve 11 is provided with a first connecting block 14 and a second connecting block 15 protruding outward and used to support the first terminal portion 12 and the second terminal portion 13; the other side of the sleeve 11 is provided with a third terminal portion 16 and a fourth terminal portion 17 symmetrical to the first connecting block 14 and the second connecting block 15.

[0027] The magnetic core member 3 includes a frame 33 that can be buckled on the outside of the frame 1, a core shaft portion 31 arranged at the center of the frame 33 and capable of being inserted into the sleeve 11, and a first positioning plate 34 and a second positioning plate 35 arranged on the inner wall of the frame 33 and used to support the core shaft portion 31, and the first positioning plate 34 and the second positioning plate 34 can be docked and clamped between the first connection block 14 and the third terminal portion 16 or between the second connection block 15 and the fourth terminal portion 17. The first positioning plate 34 and the second positioning plate 35 are symmetrically located at one end of the inner wall of the frame 33 to support the core shaft portion 31, and a positioning cavity 30 for docking with the frame 1 and accommodating the coil 2 is formed between the core shaft portion 31 and the inner wall of the frame 33.

[0028] An outer circumferential contact surface A of the core shaft portion 31 is reserved between the first positioning plate 34 and the second positioning plate 35, and the ends of the first connecting block 14, the second connecting block 15, the third terminal portion 16 and the fourth terminal portion 17 are all provided with arc-shaped groove surfaces B for docking and positioning with the outer circumferential contact surface A. By providing the arc-shaped groove surfaces B at the ends of the first connecting block 14, the second connecting block 15, the third terminal portion 16 and the fourth terminal portion 17, the magnetic core member 3 can be quickly positioned when it is buckled onto the frame 1, and the installation direction of the magnetic core member 3 is ensured to be accurate.

[0029] The first and second positioning contour surfaces B1 and B2 extending toward the outer edge of the sleeve 11 are provided on both sides of the arc-shaped groove surface B of the first connection block 14, the second connection block 15, the third terminal portion 16, and the fourth terminal portion 17, and the first and second positioning contour surfaces B1 and B2 are in contact with and pressed against at least one of the side walls of the first and second positioning plates 34 and 35 for positioning. The first and second positioning contour surfaces B1 and B2 of the arc-shaped groove surface B are in contact with and pressed against the side walls of the first and second positioning plates 34 and 35 to ensure that the magnetic core member 3 will not be offset or shaken after being installed on the frame 1, and to ensure that the magnetic core member 3 will not be displaced due to impact during subsequent use, thereby greatly improving the stability and life of the transformer.

[0030] The first terminal portion 12 and the second terminal portion 13 are respectively provided with a plurality of first wire grooves 121 and second wire grooves 131 for positioning and guiding the lead wires 21, and the pins 4 are provided on the first partitions 122 on both sides of the first wire grooves 121, and on the second partitions 132 on both sides of the second wire grooves 131. The pins 4 are provided on the first partitions 122 and the second partitions 132 along the radial direction of the sleeve 11. The first partitions 122 and the second partitions 132 are respectively provided with first mounting holes 123 and second mounting holes 133 for mounting the pins 4. The pins 4 are fixed to the first partitions 122 and the second partitions 132 by integral injection molding.

[0031] To sum up, when assembling the utility model, it is first necessary to wind the coil 2 on the sleeve 11 in the middle of the skeleton 1, and lead the lead wire 21 in the coil 2 from both sides of the skeleton 1 and wind it around the pin 4; further, insert four elastic bayonet pins 5 into the first positioning hole 32 of a core piece 3, and buckle the core piece 3 to the skeleton 1 so that the core shaft portion 31 in the middle is inserted into the sleeve 11, and then buckle another core piece 3 to the skeleton 1 in the same way, and by fastening the two core pieces 3, the elastic bayonet pins 5 are inserted into the two core pieces 3, thereby achieving a stable connection between the two core pieces 3.

[0032] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A quick-install small transformer, comprising: A frame (1), a coil (2) wound on the frame (1), a magnetic core piece (3) mounted on the frame (1), and a pin (4) arranged on the frame (1) and connected to the coil (2), wherein the magnetic core piece (3) is provided with a core shaft portion (31) that can be inserted into the frame (1) and is located at the center of the coil (2), and is characterized in that two magnetic core pieces (3) are provided and symmetrically buckled and mounted on the frame (1), and the two magnetic core pieces (3) are fixedly connected by a plurality of elastic latches (5).

2. A quick-install small transformer according to claim 1, characterized in that: The elastic latch (5) comprises a central axis portion (51) and a first elastic arm (52) and a second elastic arm (53) which are arranged at both ends of the central axis portion (51) and can be elastically inserted into the magnetic core member (3); and at least one first latching hole (32) for inserting the first elastic arm (52) and the second elastic arm (53) is arranged on the opposite end surfaces of the magnetic core member (3).

3. A quick-install small transformer according to claim 2, characterized in that: Four first elastic arms (52) and second elastic arms (53) are respectively arranged at both ends of the central axis portion (51) and are symmetrically distributed in a matrix, and can be folded, inserted and clamped when in contact with the first clamping hole (32).

4. A quick-install small transformer according to claim 3, characterized in that: The middle parts of the first elastic arm (52) and the second elastic arm (53) protrude from the outer wall of the middle axis portion (51), and the ends of the first elastic arm (52) and the second elastic arm (53) are located inside the outer wall of the middle axis portion (51), so that the outer walls of the first elastic arm (52) and the second elastic arm (53) are formed with a first transition conical surface (54) and a second transition conical surface (55) with an angle of 120°.

5. The quick-install small transformer according to claim 3, characterized in that: A first gap (56) is formed between the four first elastic arms (52) for embracing each other and shrinking, and the first gap (56) is in a "cross" shape; a second gap (57) is formed between the four second elastic arms (53) for embracing each other and shrinking, and the second gap (57) is in a "cross" shape.

6. A quick-install small transformer according to any one of claims 1 to 5, characterized in that: The elastic latch (5) is made of plastic.

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