JPS61144803A - Fly-back transformer - Google Patents

Abstract

PURPOSE:To obtain several kinds of bobbins from a bobbin by a method wherein, when a fly-back transformer is formed by providing a winding between the flanges of a bobbin on which a plurality of flanges are formed on its shaft barrel, a flange is divided into plural pieces, and the width of a groove, the thickness of the flanges and the shaft barrel are adjusted properly. CONSTITUTION:A plurality of flanges, consisting of the flanges 5a and 5b which are split in two, are put together and inserted into the groove part 4 located between the flanges 2 of the high pressure bobbin main body 1 whereon the flanges 2 are formed in one body on both sides in advance. These split flanges are composed of the flange pieces 5a and 5b having engaging parts 6a, 6b and 6c on the inside, and a recessed engaging part 6d corresponding to the engaging part 6c is provided on the surface of the shaft barrel 3 which is exposed to the groove part 4. The titled transformer is constituted as above, the flange pieces 5a and 5b are put together with the engaging part 6c is being immersed into the engaging part 6d, a set of the protruded engaging part 6a located outside the engaging part 6c and the recessed engaging part 6b is fitted in, and the flange pieces 5a and 5b are formed in one body. At this time, the thickness and the like of the flange pieces 5a and 5b is formed in desired measurements.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a flyback transformer, and particularly to an improvement in its high-pressure bobbin.

(Prior Art) As shown in FIG. 5, the conventional high-pressure bobbin of a flyback transformer has a plurality of flanges 12 integrally formed at predetermined intervals. The width of the groove portion 13, the thickness of the flange, etc., were set separately depending on the purpose of use of the flyback transformer, the voltage used, etc. (see, for example, Japanese Utility Model Publication No. 53-4119).

(Problem to be solved by the invention) Therefore, it is necessary to prepare several types of high-pressure bobbins depending on the intended use of the flyback transformer, and if one high-pressure bobbin is to be used for several types of flyback transformers, This inevitably led to problems with reliability.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a removable collar on the high-pressure bobbin, and attaches and detaches the collar according to the purpose of use of the flyback transformer.

(Function) Fig. 4 shows a cross section of a high voltage coil in which electric wire is wound around a high voltage bobbin. It is determined by the diameter of the electric wire 14, the voltage generated in the flyback transformer, the number of turns of the winding wire wound around the groove 13 of the bobbin, etc. That is, in FIG. 4, (1) the potential difference generated between the electric wires 11A14a and 14b of the isosceles triangle (shaded area) formed within the groove portion 13 is equal to or less than the withstand voltage of the electric wire used; Assuming W, [(W''/2) ÷ Wire diameter x Voltage per turn of winding] <[Electric wire coating withstand voltage] The potential difference between adjacent grooves 13 must be equal to or lower than the withstand voltage of collar 12.

Therefore, as in the present invention, by adding a collar as necessary, the thickness of the collar can be changed depending on the operating voltage of the flyback transformer, and the number of divisions of the high voltage bobbin and the width of the groove can be changed. If it is necessary to consider pressure resistance with the low-voltage coil inserted inside the bobbin, the thickness of the shaft cylinder of the high-pressure bobbin can be changed.

(Example) Hereinafter, embodiments will be described based on the accompanying drawings.

FIG. 1 shows an embodiment of the present invention, in which 1 is a high-pressure bobbin main body, 2 is a collar provided integrally with a shaft cylinder 3 in advance,
4 is a groove between the collars. 5a.

5b is a tsuba piece made by dividing one tsuba into two, and each tsuba piece 5
Engagement portions 6a, 6b, and 6c are formed in a and 5b, respectively. Further, an engaging portion 6d is formed in the shaft cylinder 3, and when the collar pieces 5a and 5b are inserted as shown by the arrows and the corresponding engaging portions are engaged, a new collar is formed in the groove. I can do it.

In this way, when a flange is additionally formed in the groove portion 4, the groove is divided, so that the winding wire wound in the groove 14 in FIG.
The potential difference generated between the wires corresponding to a and 14b is kept low, and the bobbin as a whole becomes a high voltage bobbin when the output voltage of the flyback transformer is high.

FIG. 2 shows another embodiment of the present invention, 7a,
Reference numeral 7b denotes a collar piece that is divided into two parts, each of which has a body portion 8a and 8b overlapping the outer periphery of the shaft tube 3.

Reference numerals 9a, 9b, and 9c are engaging portions, of which the engaging portion 9c is adapted to engage with a slit 9d formed in the collar 2.The bobbins of the six embodiments are designed so that the output voltage of the flyback transformer is This is suitable when it is necessary to increase the withstand voltage of the electric wire in the groove and the thickness of the shaft cylinder 3 at the same time.

FIG. 3 shows still another embodiment of the present invention, which is suitable for increasing the thickness of the collar when the potential difference between coils wound in adjacent grooves is large. ]Oa, 10
b is a flange piece, and a slit li with a protrusion 11c formed in the flange 2;
By fitting the collar piece 10a into d.

10b overlaps the tsuba 2, effectively increasing the thickness of the tsuba.

(Effects of the Invention) As explained above, according to the present invention, one type of bobbin can be easily converted into several types of bobbins by adding a detachable collar according to the purpose of use and required pressure resistance. Therefore, there is no need to prepare several types of dedicated bobbins as in the past, and therefore, it is possible to achieve a significant cost reduction.

[Brief explanation of drawings]

Figure 1 is a perspective view of one embodiment of the present invention, Figures 2 and 3 are
The figures are perspective views of other embodiments of the present invention, FIG. 4 is a partial sectional view of a high voltage coil, and FIG. 5 is a perspective view of a conventional high voltage bobbin. 1...High pressure bobbin body, 2...Tsuba, 3.
・・Shaft tube, 4 ・・Groove portion, 5a, 5b, 7a
, 7b, 10a. iob...guard piece, 8a, 8b...body. Figure 3 and Figure 4 + 41) Figure 5

Claims (1)

[Claims] In a flyback transformer in which a shaft cylinder is provided with a plurality of flanges and a wire is wound in a groove between the flanges of a bobbin, a removable flanged piece that is divided into a plurality of flanges is incorporated into the bobbin. A flyback transformer characterized by adding one or more flanges and adjusting the groove width, the flanges thickness, the thickness of the shaft cylinder, etc. according to the purpose of use.