JP2551487Y2 - Trance - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical coil bobbin used for a step-up transformer of an electronic device.

[0002]

2. Description of the Related Art In a conventional bobbin of a step-up transformer, a primary side coil and a secondary side coil are arranged side by side in a direction parallel to a coil axis as shown in FIG. A high voltage was obtained on the secondary side by dividing the pressure with a plurality of partition plates 5 and dividing the pressure within a range that could withstand. However, recently, there has been a strong demand for a thin type, and particularly in the case of a cathode ray tube, as the cathode ray tube has become thinner, the transformer itself has been required to be shorter. For this reason, the above-described structure has a limit in the thickness of the core, the thickness of the bobbin, and the like, and has a problem that the requirements cannot be satisfied. Therefore, the primary side coil and the secondary side coil are arranged in a vertical direction perpendicular to the axial direction of the coil, and a bobbin with one frame is used. In this case, in order to increase the number of windings, it is necessary to make the winding frame thinner. However, if the winding frame is made thinner, the mechanical strength is low, workability is reduced, and the first coil (secondary coil) and the second coil (primary coil) are reduced. Although the insulation between the coils is made by an insulating tape or the like, there is a problem that the insulation is insufficient and the reliability is poor.

[0003]

An object of the present invention is to provide a transformer that uses a coil bobbin that is thin, easy to assemble, and has high voltage reliability with overcoming the above-mentioned problems. is there.

[0004]

SUMMARY OF THE INVENTION According to the present invention, there is provided an insulating device in which a first coil (generally a secondary coil) and a second coil (generally a primary coil) are arranged in a direction perpendicular to the axial direction of the coil. A transformer using a coil bobbin made of
It is composed of a lower collar. A through-hole is provided in the center of the upper flange, and a first coil winding frame for winding the first coil and an inter-coil insulating frame are integrally formed on one surface of the upper flange. On the other hand, the lower flange is similarly provided with a through hole at the center, around which the same width as the first coil frame at the center of the upper flange,
A magnetic core having a size that fits inside the first coil bobbin;
An inter-coil insulating frame is integrally formed, and a second coil bobbin, which is fitted outside the inter-coil insulating frame of the upper collar and has the same width and winds the second coil, is integrally formed outside the inter-coil insulating frame. Provided,
Terminals are provided at both ends of the first coil, and a drawing hole for leading a terminal of the coil is formed near the outermost peripheral portion of the first coil. The transformer of the present invention can be obtained by bonding or welding the ends of the winding frame of the two flanges and the insulating frame while pressing them against the inner wall of the other flange, and mounting the magnetic core in the central through hole.

That is, the present invention is used for a vertical coil in which a plurality of coils are arranged in a direction perpendicular to the axis of the coil, and is composed of an upper flange and a lower flange made of an insulating material. Is provided with a through-hole in the center portion, a first coil winding frame made of a cylindrical insulator for winding the first coil on one side is integrally formed, and the lower flange has the upper portion in the center portion. A through hole communicating with the through hole of the flange, and having the same size as the first hole;
A magnetic core / coil insulating frame having a size that fits inside the first coil bobbin and has the same width as that of the first coil bobbin is provided at a position facing the coil bobbin. In the transformer using the provided coil bobbin, a step is provided in the upper flange at the inner peripheral upper end surface of the through hole, and the step is larger than the outer periphery of the first coil bobbin, and at the same time, the Provide a cylindrical insulation frame between the coils so that it is located on the outside,
The lower flange has a size that is fitted to the outside of the inter-coil insulating frame at a position facing the inter-coil insulating frame, and has a width made of a cylindrical insulator having the same width as the inter-coil insulating frame. And a plurality of terminals provided at both ends thereof, and a terminal of the first coil is led out between the second coil winding frame and the magnetic core / coil insulating frame. A lead hole is provided, and the magnetic core / coil insulating frame and the intercoil insulating frame are provided inside the first coil bobbin such that the upper end of the magnetic core / coil insulating frame reaches the step. The second coil bobbin is fitted on the outside, the upper and lower flanges are combined, the terminal is wrapped around the terminal, and the respective ends of the bobbin and the insulating frame are connected to the upper and lower flanges. A truss characterized by using a coil bobbin with a structure that is fixed to the inside by bonding or welding. The scan is.

[0006]

In the transformer of the present invention, a first coil bobbin, which is disassembled into two upper and lower flange portions, and winds a first coil and a second coil respectively, Second
Are provided concentrically, and the insulating frames between the coils and the magnetic core-to-coil insulating frame having the same width are provided at corresponding positions, respectively, in the first coil winding frame and the second coil winding frame. It is provided in a size that fits inside the frame. Therefore, the outside of the magnetic core / coil insulating frame can be fitted inside the first coil bobbin, and the inside of the second coil bobbin can be fitted outside the intercoil insulating frame. Therefore, the partition between the first coil and the second coil has a double structure, and the number of parts is two,
The second coil and the second coil are mounted horizontally, and the upper flange and the lower flange are fitted at the same height. Therefore, the coil is made thin and easy to assemble. A sufficient creepage distance can be ensured by assembling them by winding them up or facing only the first coil with the windings rising. If necessary, adhesion or welding may be performed in a range that can maintain the mechanical strength. In addition, a terminal provided at a position facing the terminal lead-out hole provided on the flange provides a sufficient distance between the high-voltage part and other parts, and a reliable air-core coil can be obtained.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating a structure of a coil bobbin used in a step-up transformer according to the present invention. FIG. 1 (a)
1 is an exploded external perspective view, and FIG. 1B is a perspective view showing a state in which they are integrally assembled. FIG. 2 is a cross-sectional view taken along line AA of the coil bobbin shown in FIG. 1 and is a cross-sectional view for explaining a step in assembling a step-up transformer coil. FIG. 2 (a)
2 shows a state before assembling, and FIG. 2B shows an assembled state.

As shown in FIG. 1A, the coil bobbin used in the transformer of the embodiment of the present invention is composed of two parts, an upper flange 6 and a lower flange 16, and the upper flange 6 has a magnetic core in the center. Is provided, a step 18 is provided on the upper end surface of the inner periphery of the through hole 17, and a first coil (here, a secondary coil) having a size substantially equal to the outer periphery of the through hole 17 is provided. Is provided, and an inter-coil insulating frame 15 that insulates the first coil and the second coil (here, the primary side coil) is provided on the outside thereof with the same material as the upper flange 6. Is integrally formed with the insulator. The lower flange 16 is provided with a through hole 17 at the center. Further, one surface of the upper flange 6 at a position corresponding to the first coil winding frame 14 and the inter-coil insulating frame 15 is provided with a magnetic core-coil insulation. The frame 13 and the second coil winding frame 7 around which the second coil is wound are integrally formed of an insulator of the same material as the lower flange. At a position between the second coil winding frame 7 and the magnetic core / coil insulating frame 13 of the lower flange 16, a lead hole 8 for leading out a terminal of the first coil is formed. In addition, the terminals 1 are separately arranged for each coil at both ends (opposite) on the outer periphery of the lower flange 16.

Next, an example of assembling an air-core coil for a step-up transformer will be described with reference to FIG. As shown in FIG. 2A, the first coil 10 is applied to the first coil former 14 inside the upper flange 6 with an insulating tape or the like having a width substantially equal to the width of the first coil former 14. It is wound in several layers. On the other hand, the second coil 11 is wound around the second coil frame 7 outside the lower flange 16 to a width substantially equal to the width of the second coil frame 7. Next, as shown in FIG. 2 (b), the lead wire 9 of the first coil 10 formed in the upper flange 6 is led out from the lead hole 8 provided in the lower flange, and the lead wire 9 between the magnetic core and the coil of the lower flange 16 is formed. The upper end of the insulating frame 13 is the step 1 of the through hole 17 of the upper flange 6.
8, the first coil winding frame 14, the second coil winding frame 7, the inter-coil insulating frame 15, and the magnetic core / coil insulating frame 13 of each flange are fitted to face each other. The welding portion 12 at each tip is pushed in until it comes into contact with the inner wall of the other flange, and is fixed by welding or bonding. afterwards,
The terminal of each coil is terminated to the terminal 1 to complete the air-core coil for the step-up transformer. A magnetic core is mounted in the through hole at the center of the air-core coil, and a step-up transformer is completed. As described above, the assembling can be easily performed, and the insulation between the magnetic core and the first coil and between the first coil and the second coil are partially formed by the end of the winding frame or the insulating frame. Even if it was welded and fixed to the inner wall of the other flange and a slight gap was generated, a sufficient pressure resistance could be secured. Also, it was easy to assemble, and the whole was very thin.

[0010]

As described above, according to the present invention, an economical and highly reliable coil bobbin that can reduce the thickness of a step-up transformer or the like, is easy to assemble, and can reliably maintain insulation between a high-voltage part and other parts. Is obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure of a coil bobbin used in a step-up transformer according to the present invention, wherein FIG. 1 (a) is an exploded perspective view, and FIG. 1 (b) is a perspective view showing an assembled state.

2 is a sectional view of the coil bobbin shown in FIG. 1, taken along the line AA. FIG. 2 (a) is a sectional view before assembly, and FIG. 2 (b) is a sectional view after assembly.

FIG. 3 is an external perspective view showing an example of a coil bobbin used in a conventional step-up transformer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Terminal 2 Bobbin 3 Secondary winding frame 4 Primary winding frame 5 Partition plate 6 Upper flange 7 Second coil winding frame 8 Lead-out hole 9 Lead wire 10 First coil 11 Second coil 12 Welding part 13 Insulation frame between magnetic core and coil 14 First coil winding frame 15 Insulation frame between coils 16 Lower flange 17 Through hole 18 Step

Claims (1)

(57) [Scope of request for utility model registration] 1. A vertical coil in which a plurality of coils are arranged in a direction perpendicular to the axis of the coil. The coil includes an upper flange and a lower flange made of an insulator, and the upper flange has a central portion. A first coil winding frame made of a cylindrical insulator for winding the first coil on one side is integrally formed,
The lower collar is provided with a through-hole of the same size in a central portion thereof in communication with the through-hole of the upper collar, and the first coil bobbin is provided at a position facing the first coil bobbin. And a coil bobbin provided with a magnetic core / coil insulating frame having a width the same as that of the first coil bobbin and having a size that fits inside the A step is provided on the inner peripheral upper end surface of the hole, and a cylindrical inter-coil insulating frame is provided so as to be larger than the outer periphery of the first coil bobbin and at the same time to be located outside the first coil. In lower tsuba,
A second coil bobbin made of a cylindrical insulator having a size fitting to the outside of the inter-coil insulating frame at a position facing the inter-coil insulating frame and having the same width as the inter-coil insulating frame. And a plurality of terminals provided at both ends thereof. The first terminal is provided between the second coil winding frame and the magnetic core / coil insulating frame.
Providing a lead hole for leading out the end of the coil, the magnetic core-coil insulating frame inside the first coil bobbin so that the upper end of the magnetic core-coil insulating frame reaches the step. And, the second coil bobbin is fitted outside the inter-coil insulating frame, the upper flange and the lower flange are combined, the terminal is wrapped around the terminal, and each end of the winding frame and the insulating frame is A transformer characterized by using a coil bobbin having a structure fixed to the inside of the upper and lower flanges by bonding or welding.