TWI575542B - Detachable transformer - Google Patents

Description

Detachable transformer

This invention relates to a transformer, and more particularly to a detachable transformer.

With the evolution and development of electronic products, different electronic products need to be driven by different power supply devices; therefore, manufacturers of power supply devices are actively trying to develop various transformer structures to be correspondingly applied to various power supply devices.

The simple transformer is composed of a first electrical conductor and a second electrical conductor, and when a non-quantitative current passes through the first electrical conductor, a variable magnetic field is generated on the first electrical conductor; and then, based on electromagnetic In the principle of mutual inductance, the varying magnetic field causes an induced electromotive force to be generated on the second electrical conductor, thereby forming a potential difference between the first electrical conductor and the second electrical conductor, thereby achieving the effect of changing the magnitude of the voltage. With the evolution of technology products, transformers can be miniaturized and mounted in various electronic devices or soldered onto circuit boards, in addition to being used as a device to change the electromotive force. Therefore, the structure of the transformer is continuously improved, and basically consists of a base, a set of primary side coils, a set of secondary side coils, and a core group. Transformers typically have an output voltage of 2.8 to 48 volts and a large output current range. If the winding of the transformer is formed by a coil, the winding corresponding to the large current is difficult to manufacture, and the output pin (pin) has a large volume and is not easy to manufacture. Furthermore, the line used for the large current is thicker, it is difficult to wrap around the pin, and the thick wire is wound around the pin to make the transformer high. Even if the thick wire is wound on the pin, causing a large current to go through the board, it will cause loss. In addition, in a low profile power supply, the top of the horizontal transformer has no magnetic core, so the transformer and the conductive housing above it cause eddy current loss.

Accordingly, the present invention has been made in view of the above problems, and a detachable transformer is proposed to solve the problems caused by the prior art.

The main object of the present invention is to provide a detachable transformer which is mounted with a second bobbin to a mounting groove of the first bobbin to form a detachable vertical joint, and then replaces the output according to the output requirement. Two winding frames, and achieve rapid manufacturing, reduce costs, miniaturize mass production and reduce eddy current losses.

To achieve the above objective, the present invention provides a detachable transformer comprising a first bobbin, a primary winding, a second bobbin, a secondary winding and a core group, wherein The side windings are formed by wires. The first bobbin has a first through hole penetrating through the center of the first bobbin. The top and bottom of the first bobbin respectively have a first winding groove and a mounting groove. The first winding groove surrounds the first through hole and is provided with a primary side winding. The mounting groove communicates with the first through hole, and one side of the mounting groove has a first opening that communicates with the external space. A portion of the edge of the bottom of the first bobbin extends horizontally to form a first baffle portion that abuts the bottom of the second bobbin. The second bobbin has a second through hole penetrating through the center of the second bobbin, the second bobbin has a second winding groove at the top, the second winding groove surrounds the second through hole, and the secondary winding is provided . The second bobbin is disposed in the mounting groove through the first opening, and the first through hole communicates with the second through hole to form a detachable combination of the second bobbin and the first bobbin. A portion of the edge of the bottom of the second bobbin extends vertically downward to form a second baffle portion that abuts the first baffle portion. The edge of the corresponding first opening of the second bobbin is provided with a plurality of notches and a plurality of pins. The magnetic core group is provided with a first bobbin and a second bobbin, and extends into the first through hole and the second through hole.

The magnetic core group further includes a first magnetic core and a second magnetic core. The first magnetic core abuts the first bobbin and extends into the first through hole, the second magnetic core abuts the second bobbin and extends into the second through hole, and is connected to the first magnetic core, To surround the first bobbin and the second bobbin.

In the first embodiment, the second winding groove is an annular groove, and the secondary side winding is formed by a wire.

In the second embodiment, one side of the second winding groove further has a second opening that communicates with the outer space, and the first opening communicates with the second opening. The secondary winding further includes a first conductive sheet, a second conductive sheet, a third conductive sheet and a fourth conductive sheet. For example, the first conductive sheet, the second conductive sheet, the third conductive sheet and the first conductive sheet The four conductive sheets are copper sheets. The first conductive sheet has a first curved portion, and the two ends thereof extend to form a first electrode portion and a second electrode portion, respectively, the first electrode portion has a higher level than the second electrode portion, and the first electrode portion and the first electrode portion The second electrode portion is respectively provided with a first locking hole and a second locking hole. The first curved portion is disposed in the second winding groove, and the first electrode portion and the second electrode portion are exposed from the second opening. The second conductive sheet has a second curved portion extending at both ends to form a third electrode portion and a fourth electrode portion, respectively, and the first electrode portion, the third electrode portion and the fourth electrode portion have the same horizontal level. The third electrode portion and the fourth electrode portion are respectively provided with a third locking hole and a fourth locking hole. The second curved portion is disposed on the first curved portion and abuts against each other, the second curved portion is located in the second winding groove, and the third electrode portion and the fourth electrode portion are respectively exposed from the second opening, and the third electrode portion is disposed On the second electrode portion and abutting each other. The third conductive sheet has a third curved portion extending at both ends to form a fifth electrode portion and a sixth electrode portion, respectively, wherein the fifth electrode portion and the sixth electrode portion have the same horizontal height, and the fifth electrode portion and The sixth electrode portion is respectively provided with a fifth locking hole and a sixth locking hole. The third bending portion is disposed on the second bending portion and abuts against each other, the third bending portion is located in the second winding groove, the fifth electrode portion and the sixth electrode portion are exposed from the second opening, and the fifth electrode portion and the The six electrode portions are respectively disposed on the first electrode portion and the third electrode portion, and the fifth electrode portion and the sixth electrode portion are respectively in contact with the first electrode portion and the third electrode portion. The fourth conductive sheet has a fourth curved portion extending at both ends to form a seventh electrode portion and an eighth electrode portion, respectively, wherein the seventh electrode portion has a higher level than the eighth electrode portion, and the seventh electrode portion and The eighth electrode portion is respectively provided with a seventh locking hole and an eighth locking hole. The fourth bending portion is disposed on the third bending portion and abuts against each other, the fourth bending portion is located in the second winding groove, the seventh electrode portion and the eighth electrode portion are exposed from the second opening, and the seventh electrode portion and the The eight electrode portions are respectively provided on the sixth electrode portion and the fourth electrode portion, and the seventh electrode portion and the eighth electrode portion are respectively in contact with the sixth electrode portion and the fourth electrode portion.

In order to give your reviewers a better understanding and understanding of the structural features and efficacies of the present invention, the following is a description of the preferred embodiment and the detailed description.

Embodiments of the invention will be further illustrated below in conjunction with the associated drawings. Wherever possible, the same reference numerals in the drawings In the drawings, shapes and thicknesses may be exaggerated based on simplification and convenient labeling. It is to be understood that the elements not specifically shown in the drawings or described in the specification are those of ordinary skill in the art. A variety of changes and modifications can be made by those skilled in the art in light of the present invention.

Please refer to Figure 1, Figure 2 and Figure 3 below. A first embodiment of the detachable transformer of the present invention will now be described. This first embodiment is for outputting high voltage and low current. For example, the low current is 5 to 30 amps. The first embodiment of the detachable transformer of the present invention comprises a first bobbin 10, a primary winding 12, a second bobbin 14, a secondary winding 16 and a core assembly 18, wherein The primary side winding 12 is formed by a wire. The first bobbin 10 has a first through hole 20 extending through the center of the first bobbin 10. The top and bottom of the first bobbin 10 have a first winding recess 22 and a mounting recess 24, respectively. The first winding recess 22 surrounds the first through hole 20 and is provided with a primary winding 12, and the wires of the primary winding 12 are wound on the first winding recess 22 by a specific number of turns as required. The mounting groove 24 communicates with the first through hole 20, and one side of the mounting groove 24 has a first opening 26 that communicates with the outer space. A portion of the edge of the bottom of the first bobbin 10 extends horizontally to form a first baffle portion 28 that abuts the bottom of the second bobbin 14. The second bobbin 14 has a second through hole 30 extending through the center of the second bobbin 14 , and a second winding recess 32 is formed at the top of the second bobbin 14 , and the second winding recess 32 surrounds the second through hole 30 , and A secondary side winding 16 is provided. The second bobbin 14 is disposed in the mounting recess 24 through the first opening 26, and the first through hole 20 communicates with the second through hole 30, so that the second bobbin 14 and the first bobbin 10 form a detachable type. Combine. A portion of the edge of the bottom of the second bobbin 14 extends vertically downward to form a second flap portion 36 that abuts the first flap portion 28. As can be seen from the illustration, the second baffle portion 36 has a protruding piece of material behind it, which can be accommodated in the space above the first baffle portion 28 to provide a preliminary positioning function, and further, the second baffle portion 36 abuts The first baffle portion 28 is such that the first through hole 20 corresponds to the second through hole 30. In this way, after the magnetic core group 18 is assembled, the second bobbin 14 is firmly coupled with the first bobbin 10, and conversely, the second bobbin 14 can be easily replaced after disassembling the magnetic core group 18, thereby achieving rapid manufacturing, Material saving, assembly convenience and other effects. The edge of the corresponding first opening 26 of the second bobbin 14 is provided with a plurality of notches 38 and a plurality of pins 40. In the first embodiment, the second winding groove 32 is an annular groove, the secondary winding 16 is formed by a wire, the wire is wound around the pin 40 through the notch 38, and the pin 40 is inserted on the circuit board. , allowing low current to flow through the wire to the board. The magnetic core group 18 surrounds the first bobbin 10 and the second bobbin 14 and extends into the first through hole 20 and the second through hole 30. The magnetic core group 18 further includes a first magnetic core 42 and a second magnetic core 44. The first core 42 abuts the first bobbin 10, the central cylinder extends into the first through hole 20, the two sides extend downward along the first bobbin 10, and the second core 44 abuts the second winding The wire frame 14 has a central cylinder extending into the second through hole 30, and both sides extend upward along the second bobbin 14 and are connected to the first magnetic core 42 to surround the first bobbin 10 and the second winding. Wire frame 14. The first core 42 and the second core 44 form a central cylinder and two sides from one side to the other, and the manufacturing process is completed in one step, which saves man-hours. In a power supply, the detachable transformer of the present invention is disposed on a circuit board, and the power supply is covered by a power supply housing, and the power supply housing is made of a conductive material. Generally, in order to reduce the eddy current loss between the drift magnetic flux and the power supply case, a vertical transformer is used, but the height of the vertical transformer is relatively high, and it is impossible to use the power supply case at a low height, for example, the height is only 1 unit (U, Unit) power supply housing, 1U is equal to 1.75 inches (inch). The detachable transformer of the present invention is a vertical transformer, and its structural design is flat enough to be applied in a low-level power supply housing, and reduces eddy current loss generated by the drift magnetic flux and the power supply casing. .

Please refer to FIG. 3, FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 8, FIG. 9, and FIG. A second embodiment of the detachable transformer of the present invention is described below. This second embodiment is for outputting low voltage and high current. For example, the high current system is greater than 40 amps. The second embodiment differs from the first embodiment in the secondary winding 16 and the second winding recess 32. In the second embodiment, one side of the second winding groove 32 has a second opening 45 that communicates with one of the outer spaces, and the second opening 45 communicates with the first opening 26.

The secondary side winding 16 further includes a first conductive sheet 46, a second conductive sheet 48, a third conductive sheet 50 and a fourth conductive sheet 52. For example, the first conductive sheet 46 and the second conductive sheet 48. The third conductive sheet 50 and the fourth conductive sheet 52 are copper sheets. The first conductive sheet 46 has a first curved portion 54 extending at two ends thereof to form a first electrode portion 56 and a second electrode portion 58 respectively. The first electrode portion 56 has a higher level than the second electrode portion 58. The first electrode portion 56 and the second electrode portion 58 are respectively provided with a first locking hole 60 and a second locking hole 62. The first curved portion 54 is disposed in the second winding groove 32, and the first electrode portion 56 and the second electrode portion 58 are exposed from the second opening 45. The second conductive sheet 48 has a second curved portion 64 extending at two ends thereof to form a third electrode portion 66 and a fourth electrode portion 68, respectively, a first electrode portion 56, a third electrode portion 66 and a fourth electrode. The third electrode portion 66 and the fourth electrode portion 68 are respectively provided with a third locking hole 70 and a fourth locking hole 72. The second curved portion 64 is disposed on the first curved portion 54 and abuts against each other, the second curved portion 64 is located in the second winding groove 32, and the third electrode portion 66 and the fourth electrode portion 68 are respectively separated from the second opening 45. Exposed, the third electrode portion 66 is provided on the second electrode portion 58 and abuts each other. The third conductive sheet 50 has a third curved portion 74 extending at both ends to form a fifth electrode portion 76 and a sixth electrode portion 78, respectively, and the fifth electrode portion 76 and the sixth electrode portion 78 have the same horizontal height. The fifth electrode portion 76 and the sixth electrode portion 78 are respectively provided with a fifth locking hole 80 and a sixth locking hole 82. The third curved portion 74 is disposed on the second curved portion 64 and abuts against each other, the third curved portion 74 is located in the second winding groove 32, and the fifth electrode portion 76 and the sixth electrode portion 78 are exposed from the second opening 45. The fifth electrode portion 76 and the sixth electrode portion 78 are respectively disposed on the first electrode portion 56 and the third electrode portion 66, and the fifth electrode portion 76 and the sixth electrode portion 78 are respectively in close contact with the first electrode portion 56 and the first electrode portion The three electrode portion 66. The fourth conductive sheet 52 has a fourth curved portion 84 extending at both ends to form a seventh electrode portion 86 and an eighth electrode portion 88. The seventh electrode portion 86 has a higher level than the eighth electrode portion 88. The seventh electrode portion 86 and the eighth electrode portion 88 are respectively provided with a seventh locking hole 90 and an eighth locking hole 92. The fourth curved portion 84 is disposed on the third curved portion 74 and abuts against each other, the fourth curved portion 84 is located in the second winding groove 32, and the seventh electrode portion 86 and the eighth electrode portion 88 are exposed from the second opening 45. The seventh electrode portion 86 and the eighth electrode portion 88 are respectively disposed on the sixth electrode portion 78 and the fourth electrode portion 68, and the seventh electrode portion 86 and the eighth electrode portion 88 are respectively abutted against the sixth electrode portion 78 and Four electrode portion 68. Since the shapes of the first conductive sheet 46, the second conductive sheet 48, the third conductive sheet 50, and the fourth conductive sheet 52 are similar, they can be fabricated in the same mold to reduce the manufacturing cost. In addition, the first curved portion 54, the second curved portion 64, the third curved portion 74, and the fourth curved portion 84 have a maximum heat dissipation area, and can be applied to a high current output to avoid making a large volume of the output pin and the thick coil. The windings are formed and the time for the thick wire to wrap around the pins 40 is omitted. Furthermore, considering that the loss generated by the large current circuit board is large, a conductive sheet can be directly connected to the output end on the circuit board, and the secondary side winding 16 of the transformer of the present invention is directly connected to the conductive sheet, and the large current does not pass. The board is directly output. Referring to the drawings, the first conductive sheet 46, the second conductive sheet 48, the third conductive sheet 50 and the fourth conductive sheet 52 are screwed through the first lock hole 60, the second lock hole 62, the third lock hole 70, and the fourth The locking hole 72, the fifth locking hole 80, the sixth locking hole 82, the seventh locking hole 90 and the eighth locking hole 92 are directly locked to the secondary side rectifier to avoid loss of high current running circuit board. According to the invention, the second bobbin 14 and the secondary winding 16 are replaced according to the output requirement, so as to avoid the repeated fabrication of the first bobbin 10 and the primary winding 12, thereby achieving rapid manufacturing, cost reduction and mass production. .

In summary, the second bobbin of the present invention forms a detachable vertical combination with the first bobbin, and replaces the second bobbin according to the output requirement, thereby achieving rapid manufacturing, cost reduction, and miniaturization. Produce and reduce the eddy current loss.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, so that the shapes, structures, features, and spirits described in the claims of the present invention are equally varied and modified. All should be included in the scope of the patent application of the present invention.

10‧‧‧First Winding Rack
12‧‧‧ primary winding
14‧‧‧Second reel
16‧‧‧secondary winding
18‧‧‧Magnetic core group
20‧‧‧First through hole
22‧‧‧First winding groove
24‧‧‧Installation groove
26‧‧‧First opening
28‧‧‧First baffle
30‧‧‧Second through hole
32‧‧‧second winding groove
36‧‧‧Second baffle
38‧‧‧ gap
40‧‧‧ feet
42‧‧‧First core
44‧‧‧second core
45‧‧‧second opening
46‧‧‧First conductive sheet
48‧‧‧Second conductive sheet
50‧‧‧ Third conductive sheet
52‧‧‧4th conductive sheet
54‧‧‧First bend
56‧‧‧First electrode section
58‧‧‧Second electrode section
60‧‧‧First keyhole
62‧‧‧Second keyhole
64‧‧‧second bend
66‧‧‧ third electrode
68‧‧‧fourth electrode section
70‧‧‧ third keyhole
72‧‧‧fourth keyhole
74‧‧‧ Third bend
76‧‧‧ fifth electrode
78‧‧‧ sixth electrode
80‧‧‧ fifth keyhole
82‧‧‧ sixth keyhole
84‧‧‧fourth bend
86‧‧‧ seventh electrode
88‧‧‧8th electrode section
90‧‧‧ seventh keyhole
92‧‧‧ eighth keyhole

Figure 1 is a perspective view of a first embodiment of a detachable transformer of the present invention. Figure 2 is an exploded view of the first embodiment of the detachable transformer of the present invention. Figure 3 is a perspective view of the first bobbin of the present invention. Figure 4 is a perspective view of a second embodiment of the detachable transformer of the present invention. Figure 5 is an exploded view of a second embodiment of the detachable transformer of the present invention. Figure 6 is a perspective view of a second bobbin of the second embodiment of the present invention. Figure 7 is a perspective view of the first conductive sheet of the present invention. Figure 8 is a perspective view of the second conductive sheet of the present invention. Figure 9 is a perspective view of a third conductive sheet of the present invention. Figure 10 is a perspective view of a fourth conductive sheet of the present invention.

10‧‧‧First Winding Rack

12‧‧‧ primary winding

14‧‧‧Second reel

16‧‧‧secondary winding

18‧‧‧Magnetic core group

22‧‧‧First winding groove

38‧‧‧ gap

40‧‧‧ feet

42‧‧‧First core

44‧‧‧second core

Claims (10)

A detachable transformer comprising: a first bobbin having a first through hole penetrating through the center thereof, the top and the bottom of the first bobbin having a first winding groove and a mounting groove respectively The first winding groove surrounds the first through hole, and one side of the mounting groove has a first opening that communicates with the external space; a primary side winding is disposed in the first winding groove; a second bobbin having a second through hole penetrating through the center thereof, the second bobbin having a second winding groove at the top thereof, the second winding groove surrounding the second through hole, the second winding The second bobbin is disposed in the mounting groove through the first opening, and the first through hole communicates with the second through hole; a secondary side winding is disposed in the second winding groove; and a The magnetic core group is configured to surround the first bobbin and the second bobbin and extend into the first through hole and the second through hole. The detachable transformer of claim 1, wherein the primary side winding is formed by a wire. The detachable transformer of claim 1, wherein a part of the edge of the bottom of the first bobbin extends horizontally to form a first baffle portion, and the first baffle portion positions the second winding frame. The detachable transformer of claim 3, wherein a portion of the bottom edge of the second bobbin extends vertically downward to form a second baffle portion, the second baffle portion abutting the first Baffle section. The detachable transformer of claim 4, wherein one side of the second winding groove further has a second opening that communicates with the outer space, the first opening communicating with the second opening. The detachable transformer of claim 5, wherein the secondary winding further comprises: a first conductive piece having a first bent portion extending at both ends to form a first electrode portion and a first a second electrode portion having a height higher than the second electrode portion, wherein the first electrode portion and the second electrode portion are respectively provided with a first locking hole and a second locking hole, and the first bending portion is provided In the second winding recess, the first electrode portion and the second electrode portion are exposed from the second opening; a second conductive sheet has a second bent portion, and the two ends thereof extend to form a first a third electrode portion and a fourth electrode portion, wherein the first electrode portion, the third electrode portion and the fourth electrode portion have the same height, and the third electrode portion and the fourth electrode portion are respectively provided with a third keyhole and a fourth locking hole, the second bending portion is disposed on the first bending portion and abutting each other, the second bending portion is located in the second winding groove, the third electrode portion and the fourth electrode portion Not exposing from the second opening, the third electrode portion is disposed on the second electrode portion and mutually a third conductive piece having a third curved portion extending at both ends to form a fifth electrode portion and a sixth electrode portion, wherein the fifth electrode portion and the sixth electrode portion have the same height. The fifth electrode portion and the sixth electrode portion are respectively provided with a fifth locking hole and a sixth locking hole. The third bending portion is disposed on the second bending portion and abuts each other, and the third bending portion is located at In the second winding groove, the fifth electrode portion and the sixth electrode portion are exposed from the second opening, and the fifth electrode portion and the sixth electrode portion are respectively disposed on the first electrode portion and the third electrode Further, the fifth electrode portion and the sixth electrode portion respectively abut the first electrode portion and the third electrode portion; and a fourth conductive sheet has a fourth bent portion, the two ends of which extend Forming a seventh electrode portion and an eighth electrode portion, wherein the height of the seventh electrode portion is higher than the eighth electrode portion, and the seventh electrode portion and the eighth electrode portion are respectively provided with a seventh keyhole and a first Eight locking holes, the fourth bending portion is disposed on the third bending portion and abutting each other, the fourth bending The curved portion is located in the second winding groove, the seventh electrode portion and the eighth electrode portion are exposed from the second opening, and the seventh electrode portion and the eighth electrode portion are respectively disposed on the sixth electrode portion and the In the fourth electrode portion, the seventh electrode portion and the eighth electrode portion respectively abut the sixth electrode portion and the fourth electrode portion. The detachable transformer of claim 6, wherein the first conductive sheet, the second conductive sheet, the third conductive sheet and the fourth conductive sheet are both copper sheets. The detachable transformer of claim 4, wherein the second bobbin corresponds to the edge of the first opening with a plurality of notches and a plurality of pins. The detachable transformer of claim 4, wherein the second winding groove is an annular groove, and the secondary winding is formed by a wire. The detachable transformer of claim 1, wherein the magnetic core group further comprises: a first magnetic core, wherein a central cylinder extends into the first through hole, and both sides are along the first bobbin And a second magnetic core having a central cylinder extending into the second through hole, the two sides extending upward along the second bobbin and connected to the first magnetic core to surround the first winding The frame and the second bobbin.