JPS5940750Y2 - flyback transformer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flyback transformer used in a television receiver, and relates to the structure of mounting when a voltage dividing resistor board is incorporated.

Fig. 1 is a circuit diagram of a flybank transformer to which the present invention is applied. 1 is a single-layer coil which is a low-voltage coil, and 2 is a high-voltage coil divided into multiple parts, each of which is shown in the figure. A high voltage is obtained by a multi-Zingler type rectification method in which a rectifier 3 is connected as shown in the figure, and the voltage is increased sequentially.

A capacitor 5 is connected to a suitable point 4 of the high voltage coil 2 to smooth the voltage and obtain a voltage for focusing the cathode ray tube.

This smoothed voltage is further divided into voltages by a voltage dividing resistor board 6 and supplied to the cathode ray tube as a focus voltage and a screen voltage.

FIG. 2 is a plan view showing a specific structure of the voltage dividing resistor board 6 shown in the circuit diagram of FIG. 1, on which a focus voltage adjustment resistor 6a and a screen voltage adjustment resistor 6b are printed. A movable terminal (not shown) whose one end is in contact with the terminal 6c and whose other end rotates and slides on the focus voltage adjustment resistor 6a with the other end in contact with the terminal 6d; A movable terminal (not shown) whose other end slides with the screen voltage adjustment resistor 6b while in contact with the
The voltage obtained from the input terminal a is divided and adjusted and taken out as a focus voltage to a no-occurrence voltage supply terminal and to a screen voltage supply terminal C as a screen voltage.

Note that d is a ground terminal.

Figure 3 is a side sectional view of a conventional flyback transformer,
It shows the connection relationship between the voltage dividing resistor board 6 and each terminal, and a high voltage coil bobbin I around which a high voltage coil 2 is wound and a low voltage coil bobbin 8 around which a low voltage coil 1 is wound are arranged coaxially, and the low voltage coil bobbin 8 is arranged coaxially. It has a structure in which a core (not shown) is inserted into the hollow part of 8.

The voltage is supplied to the voltage dividing resistor board 6 by a rectifier 30 disposed in the groove 16 formed in the center of the high voltage coil bobbin 1. The ground terminal d of the voltage dividing resistor board 6 and the screen voltage supply terminal C are drawn out from the terminal 9 [corresponding to 4 in FIG. 1] provided on the low voltage coil bobbin 8. This is done through 10b.

On the other hand, the focus voltage is taken out to the outside through a high withstand voltage line 11 connected to the focus voltage supply terminal.

In this way, as shown in FIG.
With the terminals a=d at the two locations connected to predetermined locations using lead wires, the high-voltage coil bobbin 8, which has the low-voltage coil 1 wound thereon, and the high-voltage coil bobbin 1, which has the high-voltage coil 2 wound thereon, are connected to the case (not shown). ), then injected with insulating resin and hardened.

However, the terminal 9, which is the voltage supply point on the high-voltage coil bobbin I side, is located in the center of the bobbin, and the input terminal a of the voltage dividing resistor board 60 is located at the end, so the terminal 9 and input terminal a cannot be connected. Long lead wires are required, and the other two leads aC → 10b, d → 10
A was also forced to be longer than necessary.

For this reason, when the parts shown in Figure 3 are inserted into the case and positioned, these lead wires may become slack and come into contact with or come close to high-voltage parts, leading to dielectric breakdown, which also poses problems from a reliability standpoint. Ta.

The present invention proposes a method for installing a built-in resistor in a flyback transformer that is devised to eliminate these drawbacks.

The present invention will be described below with reference to the drawings in FIGS. 4 to 6.

For convenience of explanation hereinafter, common reference numerals are given to the same components in each of the drawings of FIGS. 4 to 6.

FIG. 4 (i) The above-mentioned four terminals atbtctd are connected to the protruding terminal 14a on the back surface of the voltage-dividing resistor board 6.

14 b * 14 c t 14 d.

FIG. 5 shows the protruding terminals 14a of the aforementioned voltage dividing resistor board 604 on an insulating board made of recycled paper epoxy material or the like.

Sockets 13a, 13b, 13c, and 13a are provided at positions corresponding to the terminals 14b, 14c, and 14d, and this board is hereinafter referred to as the intermediate board 12.

Further, the intermediate board 12 is provided with a socket H3e that fits and contacts the terminal 9 at a position corresponding to the terminal 9.
e and the socket corresponding to the input terminal a (corresponding to the protruding terminal 14a) of the voltage dividing resistor board 60) 13a are connected in advance by a lead a15 as shown in FIG.

FIG. 6 shows a side sectional view of a fly bank transformer according to the present invention, in which a high-voltage coil bobbin I is wound with a high-voltage coil 2, and a low-voltage coil bobbin 8 is wound with a low-voltage coil 1.
When a voltage dividing resistor board 6 is incorporated in a flyback transformer having a structure in which a core (not shown) is inserted, the intermediate board 12 shown in FIG. 5 is connected to a high voltage as shown in FIG. Coil bobbin 7KfN Attach by fitting or welding.

At this time, the terminal 9 is formed to be slightly higher than the height of the flanges 7a at both ends of the high voltage coil bobbin I,
It is brought into fitting contact with the socket 13e provided on the intermediate board 12,
The sockets 13c and 13d are connected to the terminals 10a and 10b of the low voltage coil bobbin 8 using lead wires, respectively.

The focus voltage for supplying the cathode ray tube is taken out from the socket 13b using the high withstand voltage line 11.

In this way, the intermediate board 12 is attached to the high voltage coil bobbin I. After making the necessary connections, the voltage dividing resistor board 6 shown in FIG. 4 is inserted into the four sockets N3a as shown in FIG.

There are four protruding terminals 14a on 13b, 13c, and 13d.

Electrical connection is established by fitting 14b, 14c, and 14d in correspondence.

According to the structure of the built-in resistor mounting of the flyback transformer of the present invention, there is no problem that conventionally, connection leads slack, touch, or approach the high voltage coil part and cause dielectric breakdown, and reliability is greatly improved. Since the terminals of the voltage dividing resistor board are protruding terminals, it is easy to assemble the voltage dividing resistor board, and productivity is greatly improved.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram of a flybank transformer, Figure 2 is a plan view of a voltage dividing resistor board, Figure 3 is a side sectional view of a conventional flyback transformer with a built-in voltage dividing resistor board, and Figures 4 and 5.
The figures are a perspective view of an intermediate board used in a flyback transformer embodying the present invention and a perspective view seen from the back of a voltage dividing resistor board, respectively, and FIG. 6 is a side sectional view of a flybank transformer embodying the present invention. 1...Low voltage coil, 2...High voltage coil, 6...Resistance board for voltage division, 6a...Resistance for focus voltage adjustment, I... ...High pressure coil bobbin, 8...Low pressure coil bobbin, 12...
...Intermediate substrate, 13a, 13b. 13c, 13d, 13e...-socket, 14
a. 14b, 14c, 14d...Protruding terminal, 1
5... Lead wire.

Claims (3)

[Scope of utility model registration request] (1) A second coil coaxially arranged on the bobbin of the first coil.
In a fly bank transformer in which a voltage dividing resistor plate is installed horizontally on the bobbin of a coil, a plurality of terminals of the voltage dividing resistor plate are formed into convex shapes or small holes, and the plurality of terminals of the voltage dividing resistor plate are connected to each other. An insulating plate having a plurality of small holes or convex terminals formed thereon that fit closely together is fixed to the bobbin of the second coil, and terminals of the voltage dividing resistor plate body corresponding to the plurality of terminals of the insulating plate are respectively attached. flyback), F
;/vinegar. (2) The insulating plate is provided with a terminal having a convex shape or a small hole other than the terminal that fits into the voltage dividing resistor plate, and this terminal and other terminals are connected with a conductor. A flyback transformer according to claim 1 of the utility model registration claim. (3) The flyback transformer according to claim 1, wherein the resistor plate for distribution pressure is provided with a resistor for adjusting focus voltage.