JPS5821127Y2 - Split type coil bobbin - Google Patents

Description

[Detailed description of the invention] The present invention relates to a split-type coil bobbin in which a low-voltage coil and a high-voltage coil are wound side by side between a plurality of flanges provided on the bobbin shaft surface. It is particularly suitable for use in back transformers.

When winding a low-voltage coil and a high-voltage coil side by side on a split-type coil bobbin that has multiple flanges, conventionally, the winding start wire of the high-voltage coil had to be taken out to the outside without coming close to the high-potential coil part. For this reason, an empty winding groove, in which no coil is wound, is provided between the low-voltage coil and the high-voltage coil.

To explain this based on Figure 1, 1 is the bobbin axis;
Reference numeral 2 denotes a plurality of flanges provided on this shaft surface, in which part A is a winding groove around which a high voltage coil is wound, part B is a winding groove around which a low voltage coil is wound, and part 0 is an empty winding groove.

To wind a high-voltage coil in the winding groove of part A, the tip of the lead-out wire at the beginning of winding is tied several times to the protrusion 3 on the outer circumferential surface of the collar 2 adjacent to the empty winding groove C, and then the wire is pulled out. Tsuba line 2
It passes through the empty winding groove side on the back side, leads to the bobbin shaft 1 side of the winding groove of the high-voltage coil via the cut groove 4, and winds the required number of windings around the shaft surface.

By doing this, the lead wire is blocked by the collar 2, so that it does not cross within the same winding groove as the high voltage coil having a high potential.

In this case, when a low-voltage coil is wound in the winding groove of part 0, the lead wire comes into contact with this low-voltage coil, so it is necessary to leave part 0 of the winding groove empty.

In this way, with conventional split-type coil bobbins, empty winding grooves are essential, resulting in larger bobbins.
This was not desirable for constructing a small flyback transformer.

Moreover, because the magnetic coupling between the low voltage coil and the high voltage coil is not very tight due to the presence of the empty winding groove, when used in a flyback transformer, high order tuning cannot be achieved, and high voltage regulation and There were also problems such as not being good.

The present invention was developed in view of the above, and an object of the present invention is to provide a split-type coil bobbin in which a low-voltage coil and a high-voltage coil can be wound adjacent to each other without forming empty winding grooves. That is.

An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 2, 11 is a bobbin shaft, and 12 to 17 are a plurality of flanges provided on the surface of this bobbin shaft 11. A low voltage coil is connected between these flanges 12 and 13, and a low voltage coil is connected between these flanges 13 and 14.
High-voltage coils are wound between questions 4.15, 15.16, and 16.17.

Reference numeral 18 indicates a plurality of through grooves extending from the outer peripheral surface of the collar 12 to the surface of the bobbin shaft 11, and are for taking out the lead wire of the low voltage coil to the outside of the bobbin.

Reference numeral 19 denotes a groove formed in a part of the outer peripheral surface of the collar 13 that separates the winding grooves of the low-voltage coil and the high-voltage coil so as to divide the collar into two in the thickness direction. 1
3. A protrusion 20 protruding from the outer peripheral surface is formed, and its groove 19
An opening 21 communicating with the surface of the bobbin shaft 11 is formed at the other end.

Reference numerals 22, 23, and 24 are through grooves that lead from the outer circumferential surface of the flanges 14, 15, and 16 to the surface of the bobbin shaft 11, respectively, and are used to continuously wind high-voltage coils in the winding grooves formed between the flanges. It is something.

25 is a projection projecting from the outer peripheral surface of the collar 17.

To wind a high-voltage coil onto the split coil bobbin configured as described above, the tip of the lead-out wire at the start of winding is fixed by twisting it around the protrusion 20 of the collar 13 several times, and the groove 19 and the opening 21 are secured. After guiding the wire to the surface of the bobbin shaft 11 through the wire, the winding wire is wound the required number of times in the winding groove between the collars 13 and 14, and then,
The winding wire is sequentially wound in the winding groove between each collar via the cut grooves 22, 23, and 24.

The winding end wire of the high-voltage coil is tied to the protrusion 25 on the outer peripheral surface of the collar 17 and fixed.

Since the winding start wire of the high-voltage coil is processed as described above, it is not drawn out to winding grooves other than the high-voltage coil, and as a result, the low-voltage coil can be wound in the winding groove adjacent to the high-voltage coil. .

Since the split-type coil bobbin of the present invention is constructed as described above, an extra empty winding groove is not required, making it convenient for constructing a small flyback transformer.

In addition, since the low-voltage coil and high-voltage coil can be wound adjacent to each other, their magnetic coupling becomes tight, reducing leakage inductance, and in the flyback transformer, high-order tuning is achieved, which improves high-voltage regulation, etc. The characteristics become better.

Note that the through groove 18 of the collar 12 and the protrusion 25 of the collar 17 are not necessarily indispensable, since appropriate means can be used to process the lead wire of the low-voltage coil and the end-of-winding lead wire of the high-voltage coil.

Further, the opening 21 of the groove 19 of the collar 13, which processes the lead wire at the start of winding of the high-voltage coil, may be formed by providing a through groove 26 that penetrates the upper and lower surfaces of the collar 13, as shown in FIG. can.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional split-type coil bobbin, FIG. 2 is a perspective view of a split-type coil bobbin according to an embodiment of the present invention, and FIG.
The figure is a perspective view of main parts of another embodiment of the present invention. 11... Bobbin shaft, 12, 13, 14, 15,
16.17...Tsuba, 18°22.23,24.
26...through groove, 19...groove, 20.
25... Protrusion, 21... Opening.

Claims (1)

[Scope of utility model registration request] In a split-type coil bobbin in which a low-voltage coil and a high-voltage coil are wound side by side between multiple flanges provided on the bobbin shaft surface, the outer peripheral surface of the flanges that separate the winding grooves of the low-voltage coil and the high-voltage coil. A groove is formed in a part of the collar to divide the collar into two in the thickness direction, and one end of this groove is formed with a protrusion projecting from the outer peripheral surface of the collar, and the other end is provided with an opening that communicates with the bobbin shaft surface. A split-type coil bobbin characterized by: