JP2562562Y2 - Flyback transformer - Google Patents

Description

The present invention relates to a flyback transformer used in a television receiver.

2. Description of the Related Art A conventional high voltage lead-out portion of a flyback transformer has a configuration as shown in FIG. That is, as shown in the figure, a high-pressure lead wire 9 is drawn out from a draw-out opening of a high-pressure case 8 made of a synthetic resin, and a draw-out base of the high-pressure case 8 and a draw-out base of the high-pressure lead wire 9 are made of a sealing material such as a heat-shrinkable tube 10. It was covered and insulated and sealed.

Problems to be solved by the invention By the way, when using the heat-shrinkable tube 10,
There is a problem that the high-pressure lead wire 9 may come off due to uneven shrinkage of the heat shrink tube 10 or insufficient shrink force. In addition, when a tube-shaped rubber molded product having better tightness than the heat-shrinkable tube 10 is used, the rubber molded product must be once expanded and adhered, and the attaching work is troublesome. was there. Further, since the heat-shrinkable tube 10 to be coated does not have rubber elasticity, the heat-shrinkable tube 10 has poor fastening force even after heat shrinkage. For this reason, there is a problem that it easily comes out even when a small external force is applied.

The present invention is intended to solve such a problem. A flyback transformer having a high-voltage lead wire lead-out structure having excellent high-voltage lead wire tightening properties, good workability of mounting a high-voltage insulating seal, and excellent insulation sealing properties. It is intended to provide.

Means for Solving the Problems In order to solve such problems, the seal member inserted and fixed to the lead portion for extracting the lead wire provided in the case of the present invention is made of an elastic material, and the lead wire is penetrated. Holding, having a plurality of flanges and a lid, an outer peripheral end of the flange forms a curved surface such that an upper end diameter is larger than a lower end diameter, and a distal end of the flange abuts on an inner peripheral wall of a drawer portion; Is configured to be in contact with the upper end of the drawer.

Operation With this configuration, the lead wire penetrating through the seal member made of the elastic material is clamped and held by the inner peripheral surface through which the lead wire of the seal member penetrates, and the seal member is provided with a plurality of flanges of the seal member on the inner surface of the lead-out portion. It is pressed and held and sealed.

Embodiment FIG. 1 shows the configuration of a flyback transformer according to an embodiment of the present invention. As shown in the figure, the high-voltage lead 2 is a copper wire 2a.
And an insulating coating 2b surrounding the sealing member 3. The insulating coating 2b is made of a rubber material and penetrates the center hole of the tubular sealing member 3 and is pressed against the inner surface of the hole. A seal part 3 holding a high-voltage lead wire 2 is fitted into a hole of a synthetic resin high-pressure case 1 (a cylindrical outlet). The seal component 3 has a plurality of flanges 4 on the outer periphery. As shown in FIG. 2A, the cross-sectional shape of the flange 4 has a curved surface 5 so that the diameter of the lower end is smaller than the diameter of the upper end of the outer peripheral end. The sealing part 3 is inserted into the hole of the outlet of the high-pressure case 1 and the flange 4 is pressed against the inner surface of the hole, thereby holding and sealing the sealing part 3. When the seal component 3 is inserted into the hole, the shape of the flange 4 is easily deformed upward as shown in FIG. When the high-voltage lead wire 2 is pulled out by an external force, the second
The flange 4 is slightly deformed downward as shown in FIG.
Is pressed against the inner wall of the high-pressure case 1
The sliding resistance increases and it becomes difficult to remove. Further, since the outermost flange 4 is in close contact with the edge of the outlet of the high-pressure case 1, the entry of moisture and dust is prevented, and the high voltage does not leak.

According to the present invention, as is apparent from the description of the above embodiments, the rubber material has a lid and a plurality of flanges having a curved surface such that the upper end diameter of the outer peripheral end is larger than the lower end diameter. The flat part of the lid is in contact with the upper end of the drawer, and the tip of the flange is in contact with the inner peripheral wall of the drawer. The holding state is strong and stable, and since there are a plurality of flanges, the high-voltage lead wire is stably held at the center of the lead portion, and the distance between the lid and the flange and between the flange and the flange, that is, the creepage distance increases. High voltage insulation performance and sealing performance are improved and stress distortion can be absorbed.
Further, since the sealing part is fitted, the effect of good workability can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing the structure of a high-voltage lead wire lead-out portion of a flyback transformer according to an embodiment of the present invention, and FIG. 2 (a).
Is a side view of the sealing part, FIG. 2 (b) is a sectional view of the shape of the flange when the sealing part is inserted into the high-pressure case, and FIG. 2 (c) is when the sealing part is to be withdrawn. FIG. 3 is a sectional view showing a conventional example. 1 high-pressure case, 2 high-voltage lead wire, 3 seal component, 4 flange, 5 curved surface, 6 upper end of flange, 7
... the lower end of the collar.

Claims (1)

(57) [Scope of request for utility model registration] 1. A core, a plurality of coils wound around the core, a case in which the coil is provided, a lead portion provided in the case for leading a lead wire, and the lead wire being held through. A seal member inserted and fixed to the drawer portion, wherein the seal member is made of an elastic material and has a plurality of flanges and a lid, and the outer peripheral end of the flange has an upper end diameter larger than a lower end diameter. A flyback transformer having a curved surface, a front end of the flange abutting on the inner peripheral wall of the drawer, and a flat portion of the lid abutting on an upper end of the drawer.