JPS6223069Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flyback transformer that supplies high voltage to the cathode ray tube anode of a television receiver.

Generally, in a flyback transformer used in a television receiver, the core of the flyback transformer must be grounded, and a means for grounding must be efficiently and securely attached to the core. However, this is desirable from the viewpoint of obtaining a flyback transformer with excellent characteristics. This also applies to flyback transformers that have been developed in recent years, in which the flyback transformer is directly attached and fixed to the printed circuit board in the receiver (set) via pin-shaped terminals. applicable.

The present invention relates to a novel flyback transformer devised in view of the above matters, and in particular, first and second engagement grooves are formed on the side of one side of an upright wall provided at the upper end of the case, and the first A flyback formed by engaging and fixing a core grounding metal piece whose part contacts the core in the second engagement groove, and engaging and fixing a part of the support piece connected to the chassis of the television set in the second engagement groove. It's about trance.

Hereinafter, one embodiment of the flyback transformer of the present invention will be described in detail with reference to the drawings. In FIGS. 1 and 2, 10 is a flyback transformer, which houses a core 11, low-voltage/high-voltage coils (not shown) wound around the core 11, and low-voltage/high-voltage coils inside. It is composed of a cylindrical case 12 and an insulating resin (not shown) injected into the case 12, and includes a pin-shaped terminal 13 and a core tightening fitting 14.
Television receiver (set) through one end of the
It is placed and fixed at a predetermined position on the printed circuit board P inside. A resistor pack 15 having a focus volume and a screen volume V is attached to the side surface of the case 12 of the flyback transformer 10.
A focus lead 16 and a screen lead 17 are led upward from the upper surface of the resistor pack 15. The upper end of the case 12 with the resistor pack 15 attached to the side surface;
That is, the flyback transformer 10 is connected to the printed circuit board P.
An upright wall 19 is provided in a direction perpendicular to the upper end portion 18 at a position close to the resistor pack 15 on the upper end surface 18 in the upper end face 18 . A cylindrical fixing part 20 is provided on the surface of the upright wall 19 facing the resistor pack 15, and a screw hole 21 is formed in the fixing part 20 in the vertical direction. On the other surface of the upright wall 19 (the surface facing the surface on which the fixing portion 20 is provided), step-shaped first and second engagement grooves 22 and 23 are formed at the sides. First and second engagement grooves 2
2 and 23 are fixed parts 2 and 23, as shown in FIG. 3A and B.
A first engagement groove 22 is formed at a position on the 0 side (inner surface), and a first engagement groove 22 is formed at a position facing the fixing part 20 (outer side).
A second engagement groove 23 having a width narrower than the first engagement groove 22 is formed continuously from the engagement groove 22 . Upright wall 19
A core grounding metal piece 24 is engaged and fixed in the first engagement groove 22 provided in the first engagement groove 22 . As shown in FIG. 4, the core grounding metal piece 24 includes a plate-shaped part 24a that engages with the engagement groove 22, a fixing piece 24b formed at one end of the plate-shaped part 24a, and a lower end of the plate-shaped part 24a. It consists of an elastic tongue piece 24c that extends downward and partially contacts the core 11 while being fixed to the upright wall 19, and the fixing piece 24b includes a fixing portion 20 of the upright wall 19.
A threaded groove 24b is formed corresponding to the threaded hole 21 formed in . In addition, a part of the chassis 25 of the television receiver (set) is punched out into the second engagement groove 23 provided in the upright wall 19, and the focus lead 16,
A hollow bent portion 27 provided at the tip 26a of an arm-shaped support piece 26 connected to a chassis 25 formed in a substantially L-shape is engaged and fixed so as not to prevent the screen lead 17 from being led out. A threaded groove 28 is formed near the bent portion 27 of the arm-shaped support piece 26 in correspondence with the threaded hole 21 provided in the fixed portion 20 of the upright wall 19 . 29 is a screw, which connects the core earthing metal piece 24 and the arm-shaped support piece 26 through the screw grooves 24d and 28 of the core earthing metal piece 24 and the arm-shaped support piece 26 and the screw hole 21 of the fixing part 20.
This is for fixing it to the upright wall 19.

In a flyback transformer with such a configuration,
The flyback transformer 10 is attached to a predetermined position on the printed circuit board P with a pin-shaped terminal 13 and a core tightening fitting 1.
Place and fix via 4 etc. After that, a part of the tongue piece 24c of the core earthing metal piece 24 is brought into contact with the core 11, and the screw groove 24d of the fixing piece 24b is inserted into the fixing part 20.
As shown in FIG.
4a and fix it. Next, chassis 25
As shown in FIG. Engage and fix. And screw 2
9 through the screw groove 28 of the support piece 26 and the screw groove 24d of the core earthing metal piece 24 from the vertical direction, and through the screw hole 21 of the fixing part 20 from the same vertical direction, screw the support piece 26 and the core earthing metal piece 24. By stopping, the flyback transformer 10 is fixed to the chassis 25 via the support piece 26, and at the same time, the core earthing metal piece 24 is fixed to the upright wall 19.

In one embodiment of the flyback transformer of the present invention, an arm-shaped support piece was punched directly from the chassis, but as shown in FIG. A support piece 30 may also be used, in which case one end 30a bent at right angles is fixed to the chassis, the other configuration being consistent with the support piece 26 described above. Furthermore, in one embodiment of the present invention,
Although a flyback transformer having a structure in which a resistor pack is integrally attached to the side of the case has been described, the present invention may also be applied to a normal flyback transformer that does not include a resistor pack. Furthermore, in one embodiment of the present invention, as the first and second engaging grooves provided in the upright wall, the second engaging groove is formed narrower than the first engaging groove. , the core earthing metal piece, and a part of the support piece are each engaged and fixed, the shape and shape of the engagement groove
The dimensions etc. are not limited to the examples.
The shape of the support piece is not limited to the embodiment as long as it does not interfere with the derivation of focus leads and screen leads, or when applied to a flyback transformer that does not have a resistor pack. This can be changed as appropriate.

As described above, according to the flyback transformer of the present invention, an upright wall is provided in the vertical direction at the upper end of the case in which the core and the coil wound around the core are housed and filled with insulating resin. A fixing portion having a screw hole in the vertical direction is formed on one surface of the upright wall, and a first engagement groove and a second engagement groove are formed on the side of the other surface of the upright wall. 1, a plate-shaped part that engages with the engagement groove, a fixing piece formed at one end of the plate-shaped part, and an elastic tongue piece extending downward from the lower end of the plate-shaped part. A core earthing metal piece consisting of a metal piece is engaged and fixed with a part of the elastic tongue piece in contact with the core, and the second engagement groove is connected to the chassis of the television set and corresponds to the screw hole of the fixing part. It is made by engaging and fixing a part of a support piece with a threaded groove, and the core can be grounded simply by engaging and fixing the core grounding metal piece to the first engagement groove in the upright wall provided in the case. With this method, the means for grounding (metal piece for core grounding) can be efficiently and reliably attached to the core, and a flyback transformer with excellent electrical characteristics can be obtained, and in addition, The flyback transformer can be fixed to the chassis easily and reliably through engagement grooves, support pieces, etc., and is applicable to flyback transformers that are directly attached and fixed to the printed circuit board being set up. This is extremely effective in practice.

[Brief explanation of drawings]

FIG. 1 is a front view of a flyback transformer according to an embodiment of the present invention, and FIG. 2 is a perspective view of the flyback transformer fixed to the chassis.
FIG. 3A is a perspective view of the upright wall, FIG. FIG. 6 is a partially cross-sectional front view of the support piece in a state of being engaged and fixed in the mating groove, and FIG. 6 is a perspective view of the support piece in another embodiment of the present invention. 10... flyback transformer, 12... case, 18... upper end of case, 19... upright wall, 2
0... Fixed part, 22... First engagement groove, 23...
Second engagement groove, 24... Metal piece for core ground, 2
4a...plate-like part, 24b...fixing piece, 24c...
Elastic tongue piece, 25... Chassis, 26, 30...
...Support piece.

Claims (1)

[Scope of utility model registration request] An upright wall is provided in the upper end of the case in which the core and the coil wound around the core are housed and filled with insulating resin, and one side of the upright wall has a screw hole in the vertical direction. In addition to forming the
a plate-shaped plate located on the side of the other surface of the upright wall to form a first engagement groove and a second engagement groove; A core earthing metal piece consisting of a fixed piece formed at one end of the plate-like part, and an elastic tongue piece extending downward from the lower end of the plate-like part is attached to the elastic tongue piece. A part of the support piece is engaged and fixed in a state where it is in contact with the core, and a part of the support piece is connected to the chassis of the television set and has a screw groove corresponding to the screw hole of the fixing part in the second engagement groove. A flyback transformer characterized by a fixed engagement.