JPS645863Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high pressure generator used in a cathode ray tube device such as a television receiver.

As is well known, a cathode ray tube device such as a television receiver uses a high voltage generator for supplying a predetermined high voltage to the anode of the cathode ray tube. In recent years, in order to reduce the distributed capacitance of the high-voltage coil part of this high-voltage generator and reduce the leakage inductance between it and the low-voltage coil, windings are divided into multiple parts, and each divided coil is connected in series through a rectifying element. The mainstream is a configuration connected to the

A typical circuit connection diagram of this type of high pressure generator is shown in FIG. In the figure, 1 indicates the high voltage generator as a whole, and this high voltage generator 1 includes a core 2, a low voltage coil (primary coil) 3, a high voltage coil (secondary coil) 4, and rectifier diodes 5A, 5B, 5.
In this example, the high-voltage coil 4 is divided into three windings 4A, 4B, and 4C as described above, and each winding is connected to a rectifying diode 5 with the polarity shown.
A, 5B, and 5C are connected in series through each, one end of the winding 4A is grounded, and the diode 5C
The cathode side of the cathode ray tube is connected to the anode of a cathode ray tube (not shown).

In a high-voltage generator having such a configuration, it is necessary to increase the withstand voltage between the high-voltage coil 4 and the core 2, so the high-voltage coil bobbin is arranged concentrically with respect to the low-voltage coil bobbin at a predetermined interval in the radial direction. , a rectifier diode is arranged on the side of this high voltage coil. For this reason, for example,
A low-voltage coil bobbin and a high-voltage coil bobbin are formed separately, and after the low-voltage coil is wound around the low-voltage coil bobbin, the high-voltage coil bobbin is connected to the low-voltage coil bobbin with an appropriate coupling means, placed around the outer periphery of the low-voltage coil, and the high-voltage coil is wound. Otherwise, it is necessary to wind the coils on separate low-voltage coil bobbins and high-voltage coil bobbins, and then connect the two coil bobbins with an appropriate coupling means, which makes manufacturing complicated and considerably large. There was a drawback.

Therefore, the purpose of the present invention is to arrange and wind a low voltage coil and a high voltage coil divided into two on one bobbin in the axial direction, and to connect a rectifier arrangement plate to which a multiplier rectifier circuit element is attached to the bobbin. It is an object of the present invention to provide a high voltage generator in which a capacitor of a multiplier rectifier circuit element is arranged at a corner of a substantially square case.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows an example of the circuit configuration of a high pressure generator to which the present invention can be applied.
0, the high-voltage coil (secondary coil) 11 is divided into two windings 11A and 11B, and a multi-voltage rectifier circuit element is connected between the divided high-voltage windings. In this example, there are 3 multiplier rectifier circuit elements.
Since it has a voltage doubler rectifier circuit configuration, five rectifier diodes 12A, 12 are connected in series with the illustrated polarity between the divided high voltage windings 11A and 11B.
B, 12C, 12D, 12E and the first and second
A first capacitor 13A is connected in parallel to a series circuit of diodes 12A and 12B, and a second capacitor 13 is connected in parallel to a series circuit of second and third diodes 12B and 12C.
B, third and fourth diodes 12C and 1
A third capacitor 13C, fourth and fifth diodes 12D connected in parallel to a 2D series circuit.
and a fourth connected in parallel to the series circuit of 12E.
It consists of a capacitor 13D. High voltage winding 11A
The other end is grounded, and the other end of the high voltage winding 11B is connected to the anode of a cathode ray tube (not shown).

Here, if the high voltage coil 11 is divided into two and a multiplier rectifier circuit element is connected between them, the high voltage coil 1
Since the generated pulse number 1 is approximately the high voltage output EH/the number of double voltage rectification stages, it becomes the high voltage output EH/2·(the number of double voltage rectification stages). In this example, a triple voltage rectifier circuit configuration is used, so approximately 1/3 to 1/6 of the high voltage output EH is used.
decreases to In this way, the pulse voltage induced in each high-voltage winding is considerably reduced, so the AC withstand voltage is low, and the high-voltage coil is placed at a predetermined distance in the radial direction from the low-voltage coil as in the past. There is no need to increase the withstand voltage, and even if the core is placed side by side with the low voltage coil, problems such as discharge occurring between the high voltage coil and the core will not occur.

The present invention has been developed with attention to these points, and one embodiment thereof is shown in FIGS. 3 and 4.
In the present invention, a low voltage coil 3 is wound around a single coil bobbin 14, and two coils are attached to the side of this low voltage coil 3.
The high voltage coil 11 divided into two parts is wound. In this embodiment, a case is shown in which the low voltage coil 3 is divided into two, and each divided high voltage winding 11A, 11B is further divided into two and wound around a single bobbin 14. The winding manner can be arbitrarily changed as necessary. Of course, changes such as winding a tertiary coil may be made as necessary.

Multi-voltage rectifier circuit elements, namely rectifier diodes 12A to 12E and capacitors 13A to 13, are connected between two divided high voltage windings 11A and 11B.
D is attached to the rectifier arrangement plate 15 and connected to the bobbin 14 by suitable means. Among the rectifier circuit elements, large capacitors 13A to 13D are attached to the rectifier arrangement plate 15 so as to be arranged at the corners of a generally square case 16 that circumscribes the coil bobbin 14 at a predetermined interval α, and small diodes 12A to 12E are respective pairs of protruding pieces 15A integrally formed on the arrangement plate 15 at predetermined intervals in the axial direction.
Install each in between. Of course, the rectifying element arrangement plate 15
Although the shape and configuration of the capacitor are not limited to those shown in the drawings, the capacitor has a rectangular case 16.
and the circular coil bobbin 14.

Rectifier arrangement plate 15 shown in FIGS. 3 and 4
The shape of is not exact and is merely an example of the arrangement of the rectifier circuit elements.

In this way, in the present invention, a low-voltage coil and a high-voltage coil are wound in parallel in the axial direction around a single coil bobbin, and a multi-voltage rectifier circuit element connected between the two divided high-voltage windings is mounted on a rectifier arrangement plate. Since this placement plate is connected to the bobbin so that the capacitor is installed and placed in the corner of the roughly square case, the coil bobbin can be considerably miniaturized, and the capacitor can be placed in the corner, which is a dead space. Therefore, the entire device can be made compact. Also, low voltage and high voltage coils (and other windings such as tertiary coils if necessary) on a single coil bobbin
Since it is only necessary to wind the rectifier and connect the rectifier arrangement plate with the multi-voltage rectifier circuit element attached to the bobbin, the work efficiency is further improved. Furthermore, there are significant advantages such as ease of manufacturing the coil bobbin.

It should be noted that the above embodiments are merely illustrative of the present invention, and therefore various modifications and changes may be made as necessary.
It goes without saying that changes can be made. for example,
The multi-voltage rectifier circuit connected between the two divided high-voltage windings may be another multi-voltage rectifier circuit such as a double voltage, quadruple voltage, etc., or a multi-voltage rectifier circuit with other circuit configurations. It may also be a rectifier circuit. Further, a circuit configuration may be adopted in which the focus voltage or the screen voltage is taken out from the multi-voltage rectifier circuit. Furthermore, the shape, structure, etc. of the coil bobbin are not limited to the illustrated example.

As mentioned above, according to the present invention, a very compact high pressure generator with good workability can be obtained.
When applied to various cathode ray tube devices including television receivers, its effects are remarkable.

[Brief explanation of the drawing]

Fig. 1 is a typical circuit connection diagram used in a conventional high-pressure generator, Fig. 2 is a typical circuit connection diagram of a high-pressure generator to which the present invention can be applied, and Fig. 3 is a typical circuit connection diagram of a high-pressure generator according to the present invention. FIG. 4 is a schematic cross-sectional view showing one embodiment, and is a schematic view illustrating the arrangement of multiple voltage rectifier circuit elements. 10: High voltage generator, 11: High voltage coil, 11
A, 11B: divided high-voltage winding, 14: coil bobbin, 15: rectifier arrangement plate, 16: case.

Claims (1)

[Scope of utility model registration request] A rectifier element in which a low-voltage coil and a high-voltage coil divided into two are arranged and wound on a single coil bobbin in the axial direction of the bobbin, and a multi-voltage rectifier circuit element connected between the two-divided high-voltage coil windings is attached. A high voltage generator comprising: a placement plate coupled to the bobbin; and a capacitor of the multi-voltage rectifier circuit element arranged at a corner of a generally square case circumscribing the coil bobbin at a predetermined interval.