JP3055485B2 - Flyback transformer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flyback transformer (hereinafter also referred to as "FBT") used in a display device using a cathode ray tube used in a color television receiver or a computer terminal, a method of manufacturing an FBT, and an FB.
The present invention relates to a component fixing plate for T.

[0002]

2. Description of the Related Art A conventional FBT is shown in FIGS. FIG. 6 is a diagram showing a connection portion of a conventional flyback transformer with a high-voltage processed product, FIG. 7 is a diagram showing a connection portion of the flyback transformer between a high-voltage capacitor and a protection resistor, and FIG. 8 is a configuration of the flyback transformer. FIG.

In the figure, 1 is a ferrite core, 2 is 1
Secondary winding, 3 is a primary winding bobbin, 4 is a secondary winding, 5
Is a secondary winding bobbin, 6 is a rectifying element for rectifying an output pulse, 7 is a high voltage capacitor, 8 is a component fixing plate for fixing the rectifying element 6 and the high voltage capacitor 7, etc., 9 is an epoxy resin as an insulating material, 10 Denotes an outer case, 11 denotes a conductive rubber for connection to the high-voltage line 16, 12 denotes a first protection resistor having a terminal whose one end is sharpened, 13 denotes a second protection resistor, and 14 denotes a second protection resistor.
Are insulating cylinders, which constitute an FBT main body.

Reference numeral 35 denotes a high-pressure processed product. A sharp terminal 17 is pressed against one end of a high-voltage wire 16, and the other terminal is provided with an anode cap and an anode connection fitting (both not shown). Further, an insulating rubber cap 19, a first fixed sleeve 20, and a second fixed sleeve 21 are mounted in the middle.

[0005] The high-pressure processed product 35 is connected to the insulating tube 14 of the FBT main body.
, The terminal 17 at the tip of the high-pressure processed product 35 is inserted into the conductive rubber 11 inserted into the insulating tube 14, and the engaging portion 20 a of the first fixing sleeve 20 is connected to the high-voltage terminal portion of the outer case 10. It is configured to engage with the inner end engaging portion 10a to hold the high-pressure processed product 35 and the FBT main body.

[0006] Electrical connection inside the FBT main body is mainly performed by soldering or caulking with conductive rubber. For example, the connection between the FBT main body and the high-voltage line 16 is shown in FIG.
As shown in (1), the resistance lead 12a of the high-voltage output section of the FBT is connected to the terminal 17 of the high-voltage processed product 35 via the conductive rubber 11. The connection of the terminal of the secondary winding 4 or the terminal of the rectifying element 6, the connection of the second protection resistor 13 and the first protection resistor 12 of the high voltage capacitor 7, and the connection of the high voltage capacitor 7 As shown in FIG. 7, this is done by soldering 115 . That is, the connection between the high-voltage capacitor 7 mounted on the component fixing plate 8 and the components such as the rectifying element 6 is completed before the outer case 10 is mounted.

[0007] In this way, the connected component fixing plate 8 is disposed on the coil body in which the primary winding bobbin 3 and the secondary winding bobbin 5 are fitted, and the coil body is inserted into the outer case 10 of the FBT. By doing so, the FBT body is formed. F
The BT body is filled and hardened with an epoxy resin 9 which is an insulating material for insulating the high pressure generating portion of the BT body.

[0008]

However, in such an FBT, the connection between the conductive rubber 11 and the first protection resistor 12 at the connection portion with the high-voltage line 16 is a U-shaped first protection resistor. The tip of the bent lead 12a is sharp and is electrically connected by inserting it into the conductive rubber 11, but the tip 12a of the first protection resistor 12 is bent into a U-shape. Since the position cannot be fixed, the strength is weak and the position is uncertain.

Although the electrical connection between the high voltage capacitor 7 and the rectifying element 6 or the terminals of the first and second protection resistors 12 and 13 is soldered, a short circuit due to solder adhesion to a solder temper or other places, etc. In addition, there is a problem in that it is difficult to automate due to the reliability problem of the soldering and the unstable soldering operation.

Further, the coil body is inserted into the outer case 10 for filling and curing of the epoxy resin 9. In the case of connection requiring soldering, the electrical connection and the mechanical connection before the insertion into the outer case 10 are performed. Must be completed. Therefore, there is a problem that the number of production steps increases.

The present invention solves the above problems, and provides a flyback transformer, a method of manufacturing the flyback transformer, and a component fixing plate for the flyback transformer, which can simplify the production process and perform efficient production. The purpose is to do.

[0012]

An outer case, a coil portion comprising at least a primary winding and a secondary winding wound in a plurality of layers, and a rectifying element connected at least between the layers of the secondary winding A component fixing plate having: a connector for outputting a high voltage generated by the secondary winding; and a high-voltage capacitor and the high- voltage capacitor, which are formed separately from the component fixing plate.
High voltage capacitor fixing plate having conductive rubber connected to
And a configuration in which the conductive rubber and the connection fitting are connected.

[0013] In addition to the above configuration, the outer case is provided with a component fixing plate holding portion for directly or indirectly fixing the component fixing plate, and a positioning portion for positioning at least a part of the high voltage capacitor fixing plate.

[0014]

According to the above construction, it is not necessary to perform a complicated connection operation, particularly a soldering operation, and the production efficiency can be improved.

Hereinafter, a flyback transformer according to an embodiment of the present invention will be described.

FIG. 1 is an explanatory view showing the vicinity of a connection fitting in a flyback transformer according to an embodiment of the present invention, FIG. 2 is an explanatory view showing the structure of the flyback transformer, and FIG. FIG. 4 (a) is a side view showing the connection fitting, FIG. 4 (b) is a bottom view thereof, FIG. 4 (a) is a top view of the periphery of the capacitor fixing plate of the flyback transformer, FIG. 4 (b) is a side view thereof, and FIG. FIG. 5 is a bottom view, and FIG. 5 is a view showing a positioning portion of an outer case of the flyback transformer.

In the figure, 1 is a ferrite core, 2 is a primary winding, 3 is a primary winding bobbin, 4 is a secondary winding, 5 is a secondary winding bobbin, and 15 is a primary winding. A coil body in which the wire bobbin 3 and the secondary winding bobbin 5 are fitted, 6 is a rectifying element for rectifying an output pulse, 7 is a high-voltage capacitor, 22 is a fitting, 8 is connected to the rectifying element 6 and the protection resistor 12. A component fixing plate for fixing the metal fittings 22, 18 is a high-voltage capacitor fixing plate for fixing the high-voltage capacitor 7, the protective resistor 13, and the conductive rubber 11, 9 is an epoxy resin as an insulating material, 10 is an outer case, and 14 is an insulating cylinder. Yes, these make up the FBT body.

On the other hand, the high-pressure processed product (not shown)
One end of the core wire 6 is a core wire from which the coating is removed, the other end is provided with an anode cap and an anode connection fitting, and the middle is provided with an insulating rubber cap. When the high-pressure processed product is inserted into the insulating tube 14 of the FBT main body, the tip of the high-pressure processed product is inserted into the inverted V-shaped portion 22b of the connection fitting 22 inserted into the insulating tube 14, so that the high-pressure processed product and F
The BT main body can be held.

FIGS. 3 (a) and 3 (b) show typical examples of the connection fitting 22 having a needle-shaped part 22a, a part 22b capable of connecting a high-voltage line, and a part 22c capable of connecting the rectifying element 6. FIG.

The connection fitting 22 is mounted on the component fixing plate 8, the rectifying element 6 is mounted on the component fixing plate 8, and the lead of the rectifying element 6 is sandwiched between the shape portions 22c to which the rectifying element 6 of the connection fitting 22 can be connected. The element 6 can be electrically connected to the connection fitting 22.

Further, by inserting the coil body 15 provided with the component fixing plate processed product 23 into the outer case 10 or the insulating tube 14 provided in the outer case 10, the gap 8a of the component fixing plate 8 and the connection fitting are connected. The connection portion 22b of 22 is press-fitted into the inner end 14a of the insulating tube 14 to form a connection portion with a high-voltage line, and also serves as an FBT main body.

FIGS. 4 (a) to 4 (c) show typical examples of the processed high-voltage capacitor fixing plate 24 on which the conductive rubber 11 is mounted.
Shown in After attaching the connection fitting 25 and the conductive rubber 11 to the high-voltage capacitor fixing plate 18, the high-voltage capacitor 7 having the high-voltage lead 7 a cut to a predetermined size (about 10 mm) is inserted, and the high-voltage lead 7 a is connected to the connection fitting 25. And the ground-side terminal 7b is fixed in position by being inserted into the engaging portion 18b of the high-voltage capacitor fixing plate 18. Further, the one end lead 13a of the second protection resistor 13 is cut straight and the other end 13b is cut and bent to about 120 °, the lead 13a is inserted into the holding portion 25b of the connection fitting 25, and the lead 13b is inserted into the conductive rubber 11. . Furthermore, high-voltage capacitor fixing plate 1
8 has a T-shaped rib 18c and a convex rib 18d.
Are integrally formed.

FIG. 5 shows the positioning formed on the high-voltage capacitor fixed plate processed product 24, the component fixed plate processed product 23, and the outer case 10 which are formed separately. The T-shaped rib 18c and the projection 18d of the high-voltage capacitor fixing plate processed product 24 are
The conductive rubber 11 of the high-voltage capacitor fixing plate processed product 24 was mounted on the component fixing plate processed product 23 by inserting along the T-shaped concave portion 10c and the concave portion 10d of the positioning of the outer case 10 in which the BT body was inserted. It is inserted and connected to the needle-like portion 22a of the connection fitting 22 to enable electrical connection, and is fixed in position by the concave portions 10c and 10d of the outer case 10 and the T-shaped rib 18c and the convex portion 18d of the high-voltage capacitor fixing plate 18. Further, for insulating the high-voltage generating portion, it is filled and hardened with an epoxy resin 9 as an insulating material.

Thus, the conventional soldering operation is reduced, and the problems associated therewith are reduced. In addition, the manufacturing method is different from the conventional method in which parts including a high-voltage capacitor are collectively processed on one component fixing plate, and the high-voltage capacitor 7 and its associated part are separated into a high-voltage capacitor fixing plate processed product 24 to form an outer case 10. Fixing plate 8 (Processed part fixing plate 23)
Then, by inserting the high-voltage capacitor fixing plate 18 (high-voltage capacitor fixing plate processed product 24),
The processing of the component fixing plate 8 and the processing of the high-voltage capacitor fixing plate 18 can also be automated because the soldering is eliminated, and the production can be performed with higher efficiency. Further, by using the same connection portion shape for the high-voltage capacitor fixing plate processed products 24 having different shapes and types, the main body portion including the high-voltage line connection portion and the component fixing plate processed product 23 can be shared.

[0025]

As is apparent from the above description, according to the present invention, there is no need to perform a complicated connection operation, especially a soldering operation, and the production efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram around a connection fitting in a flyback transformer according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of the flyback transformer.

FIG. 3A is a side view showing a connection fitting of the flyback transformer, and FIG.

FIG. 4 (a) is a top view of the periphery of a capacitor fixing plate of the flyback transformer, FIG. 4 (b) is a side view thereof, and FIG.

FIG. 5 is a view showing a positioning portion of an outer case of the flyback transformer.

FIG. 6 is a diagram showing a connection portion between a conventional flyback transformer and a high-pressure processed product.

FIG. 7 is a diagram showing a connection portion between a high-voltage capacitor and a protection resistor of the flyback transformer.

FIG. 8 is an explanatory diagram showing a configuration of the flyback transformer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Ferrite core 2 Primary winding 3 Primary winding bobbin 4 Secondary winding 5 Secondary winding bobbin 6 Rectifier 7 High voltage capacitor 7a High voltage lead 7b Earth side lead 8 Component fixing plate 8a Gap Reference Signs List 9 epoxy resin 10 outer case 10a inner end fitting portion 10c T-shaped recess 10d recess 11 conductive rubber 12 protection resistor 12a lead wire 13 protection resistor 13a lead wire 13b lead wire 14 insulating cylinder 14a inner end 18 high voltage capacitor fixing plate 18a Engagement part with component fixing plate 18b High-voltage capacitor earth engagement part 18c T-shaped rib fitted with exterior case 18d Fitted projection with exterior case 22 Connection fitting 22a that outputs high voltage 22a Needle-shaped part 22b Inverted C-shaped portion 22c Shaped portion that can be connected to rectifier element 23 Parts fixed plate processed product 24 High-voltage capacitor fixed plate processed product 25 Connection fitting 25a Nipping part 25b Nipping part

Claims (2)

(57) [Claims] An exterior case; a coil portion including at least a primary winding and a secondary winding wound in a plurality of layers; a rectifying element connected at least between layers of the secondary winding; a component fixing plate having a fitting for outputting a high voltage generated by the winding, is configured on the component fixing plate and another member, prior to a high pressure condenser
A high voltage capacitor having a conductive rubber connected to the high voltage capacitor
Flyback transformer comprising a capacitor fixed plate, formed by connecting the connection fitting and the conductive rubber. 2. The flyback according to claim 1, wherein the outer case is provided with a component fixing plate holding portion for directly or indirectly fixing the component fixing plate, and a positioning portion for positioning at least a part of the high voltage capacitor fixing plate. Trance.