JPS5812554Y2 - flyback transformer - 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.

In recent years, flyback transformers used in television receivers have been designed to house high-voltage coils, low-voltage coils, and electrical circuit components such as high-voltage rectifiers connected to the output side of the high-voltage coils in a roughly cylindrical case made of insulating material. Store it inside the
A structure has been developed in which the case is filled with insulating resin and the coil and electric circuit components are integrally impregnated and molded within the case.

However, in the conventional flyback transformer having the above-mentioned configuration, the electric circuit components are arranged and fixed around the outer periphery of the high-voltage coil, and the shape of the case (overall shape) becomes larger in the circumferential direction. , the coil and electrical circuit components are placed and fixed in advance around the outer periphery of the high-voltage coil, and then the coil and electrical circuit components are housed in a case, and a means for fixing the electrical circuit components is required separately from the case. As a result, the number of parts increases, and furthermore, no consideration is given to the connection or lead-out position of the high voltage output lead wire connected to the output side of the electric circuit component, and lead wires may be rotated, disconnected, disconnected, etc. It has various drawbacks, such as the possibility that

The present invention relates to a flyback transceiver aimed at eliminating the above-mentioned drawbacks, and in particular has an opening on one side and a plurality of holes for protruding terminals on the other side, and houses high-voltage and low-voltage coils inside. The case body has an opening on one side, a high-voltage output lead wire outlet on the other side, and a case lid that houses and fixes electrical circuit components inside. This relates to a flyback transformer formed by displacing a high-voltage output lead wire lead-out portion in the circumferential direction from a connection point between the high-voltage output lead wire and an electric circuit component.

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

1 and 2, reference numerals 1 and 1 denote a pair of U-shaped cores, and a high voltage coil 2 and a low voltage coil 3 are mounted on the core 1 while being wound around a bobbin 4.

The bobbin 4 has a core 1 inserted inside and a high voltage coil 2 on the outer periphery.
- A cylindrical part 41 around which the low voltage coil 3 is wound, and a cylindrical part 41
The terminal mounting portion 42 includes a substantially fan-shaped terminal mounting portion 42 formed at one end and divided into a plurality of pieces.
is planted and fixed.

A bobbin 4 on which the high voltage coil 2 and low voltage coil 3 are wound and the terminal 5 is implanted and fixed is housed in a case body 6 made of an insulating material such as Noryl.

As shown in FIGS. 2 and 3A, the case body 6 has a hollow cylindrical shape, and has an opening 6K on one side 61 and a plurality of tapered holes 6S for protruding terminals on the other side 62. The terminal 5 implanted in the bobbin 4 is inserted into the hole in the wall 6T of the case body 6. 6S and protrudes to the outside (at this time, since the shape of the hole 6S is tapered, it becomes easy to insert and protrude the terminal 5.

), and with the wall portion 6T regulating the position of the bobbin 4 within the case body 6, and the high voltage coil 2 being placed in the large diameter portion 6R, the high voltage coil 2 and low voltage coil 3 are connected to the case via the bobbin 4. It is stored and fixed inside the main body 6.

A case lid 7 made of an insulating material such as Noryl is fitted and fixed into the opening 6K of the case body 6.

The case lid 7 has an opening 7K formed on one side 71 corresponding to the opening 6K of the case body 6, and a hole 7S through which the core 1 is inserted in the radial center approximately in the peripheral wall from the bottom toward the side 71. is provided in a raised state, and seven approximately semicircular hollow protrusions are formed in the thickness direction (axial direction) on the other side surface 72.

As shown in FIG. 3B, at least one pair of locking protrusions 8 are formed on the inner surfaces of the seven protruding parts of the case lid 7, and are formed by planting them from the bottom surface. Electric circuit components such as a high-voltage rectifier 9 such as a glass diode, a high-voltage resistor 10, etc. connected to the output side of the high-voltage coil 2 via a locking protrusion 8 are connected to the hollow portion) and housed and fixed therein.

Further, on the side surface 72 of the case lid 7, a high-voltage output lead wire HVR is connected to the electric circuit component and supplies high voltage to the cathode ray tube anode. A hollow cylindrical high voltage output lead wire lead-out portion 7U for drawing out is formed to protrude in the axial direction from a position displaced in the circumferential direction from a connection point F between the electric circuit component and the high voltage output lead wire HVR.

Then, with the case body 6 and the case lid 7 fitted together, the case is filled with an insulating/flame-retardant resin such as epoxy resin.
The coils 2, 3 and electric circuit parts are impregnated and molded in an integrated manner.

In the flyback transformer having such a configuration, the bobbin 4
The high-voltage coil 2 and low-voltage coil 3 are wound around the bobbin 4, and the bobbin 4 is housed in the case body 6 with a predetermined connection made to the terminal 5.

When the bobbin 4 (high-voltage coil 2 and low-voltage coil 3) is housed and fixed in the case body 6, the case cover 7, which has electrical circuit components connected and fixed inside the seven protrusions, is connected to the coil 2.
After connecting ゜3 to the electric circuit components and connecting the electric circuit components to the high voltage output lead wire HVR, fit the opening 7K of the case lid 7 into the opening 6K of the case body 6. With the coil 2.3 and the electric circuit parts fixed inside the case, an insulating/flame-retardant resin E such as epoxy resin is injected and filled inside the case, and the coil 2 is fixed. , three electrical circuit parts are impregnated and molded together.

In one embodiment of the flyback transformer of the present invention, a high-voltage coil and a low-voltage coil are wound side by side on a bobbin, but the winding shape of the coil is not limited to the embodiment. Instead, for example, high-voltage and low-voltage coils may be wound one on top of the other, and the bobbin shape can be changed as appropriate depending on the winding shape of the coils.

In addition, the shape of the case that houses the high-voltage/low-voltage coils and electrical circuit components is such that the high-voltage output lead wire outlet formed on the case lid is displaced in the circumferential direction from the connection point between the high-voltage output lead wire and the electrical circuit components. However, other configurations are not limited to the embodiments.

As described above, according to the flyback transformer of the present invention, -
A case body with an opening on one side and multiple holes for protruding terminals on the other side, housing a high-voltage coil and a low-voltage coil inside, an opening on one side, and a high-voltage output lead on the other side. The case lid has a wire lead-out part and an electric circuit component is housed and fixed therein. This prevents the high-voltage output lead wire from rotating, disconnecting at the connection point, disconnecting due to pulling, etc., increasing its service life, and also allows the electrical circuit components to be attached to the side of the coil through the case lid. It has various effects such as being able to fix the arrangement and making the overall shape smaller in the circumferential direction.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the structure of an embodiment of the flyback transformer of the present invention, FIG. 2 is a perspective view of the exploded structure, and FIG. 3 is a front view of the case body and case lid. 1...Core, 2...High voltage coil, 3.
...Low voltage coil, 4...Bobbin, 6...
...Case body, 7...Case lid, K.
...Case, 7U...High voltage output lead wire lead-out section, HVR...High voltage output lead wire, D...
...Electrical circuit parts, F...Connection point, E...
...Insulating flame retardant resin.

Claims (1)

[Scope of utility model registration request] A hollow cylindrical case body with an opening on one side and multiple holes for protruding terminals on the other side, and housing a high-voltage coil and a low-voltage coil inside; It has a substantially semicircular hollow protrusion on the side surface, and a high-voltage output lead wire lead-out part that continuously protrudes in the axial direction from the end of the protrusion,
A case lid is provided in which the electric circuit component is housed and fixed inside the protrusion through a locking protrusion, and the high voltage output lead wire lead-out portion of the case lid is connected to the high voltage output lead wire and the electric circuit component. A flyback transformer characterized by being formed from a position displaced in the circumferential direction from a connection point.