JP3028279U - Inverter transformer - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To prevent dielectric breakdown that occurs between a coil portion and a lead wire in an inverter transformer. A notch portion of a notch portion 5 provided in a collar 2 of a bobbin 1 used for an inverter transformer is made larger than a notch portion of another collar so that the collar 2 and the lead wire 3 do not come into contact with each other.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to prevention of dielectric breakdown of a planar type inverter transformer.

[0002]

[Prior art]

 Conventionally, in a planar mounting type inverter transformer in which a coil is wound around the outer circumference of a bobbin 11 having a built-in core and having a plurality of collars 12, the lead wire 13 contacts the coil portion 14 as shown in FIG. To avoid this, a part of each brim was cut out, and the lead wire 13 was fixed in close contact with the cutout portion 15 as shown in FIG.

[0003]

[Problems to be solved by the device]

 However, dielectric breakdown occurred between the coil portion having the lowest voltage and the lead wire portion (B portion) fixed to the collar close to the coil portion.

[0004]

[Means for Solving the Problems]

 In the present invention, in order to solve the above-mentioned problems, the collar and the leader line are not in contact with each other.

[0005]

【Example】

 1 and 2 are a perspective view and a partially enlarged vertical sectional view of an inverter transformer according to the present invention, which will be described below with reference to the drawings.

The cutout portion of the cutout portion 5 provided on the collar 2 wound around the bobbin 1 and adjacent to the coil portion 4 having the lowest potential difference is made larger than the cutout portion 5a of the adjacent collar 2a. As shown in FIG. 2, the lead wire 3 and the notch portion 5 were prevented from contacting each other.

[0007]

As described above, in the bobbin 1 used in the inverter transformer according to the present invention, the bridging 2 and the lead wire 3 in the portion having the highest potential difference are prevented from coming into contact with each other, so that the dielectric breakdown occurs. The frequency of occurrence of was extremely reduced.

Further, by filling the gap between the collar 2 and the lead wire 3 with an insulating material, it is possible to further increase the dielectric strength voltage.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of an inverter transformer according to the present invention.

FIG. 2 is a partially enlarged vertical sectional view of a bobbin of an inverter transformer according to the present invention.

FIG. 3 is a perspective view of an example of a conventional inverter transformer.

FIG. 4 is a partially enlarged vertical sectional view of a bobbin of a conventional inverter transformer.

[Explanation of symbols]

 1 Bobbin 2, Tsuba 2a Tsuba 3 Leader wire 4 Coil part 5, Notch part 5a Notch part 11 Bobbin 12 Tsuba 13 Leader wire 14 Coil part 15 Notch part

Claims (1)

[Scope of utility model registration request] 1. A flat type inverter transformer having a core built-in and a coil wound around an outer circumference of a bobbin having a plurality of collars, each of which is provided for fixing a lead wire of the coil. Inverter transformer characterized in that among the notches formed, only one notch has a larger notch than the other notches.