JPH0831380B2 - High voltage transformer - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high voltage transformer used in a high voltage power supply device for a copying machine.

2. Description of the Related Art Conventionally, this type of high voltage transformer has been shown in FIG. In FIG. 4, a primary bobbin 1 wound with a primary winding and a secondary bobbin 2 wound with a secondary winding are combined, and terminals 3 of the primary bobbin 1 and the secondary bobbin 2 are rectified or resonated. 5 is connected to the printed circuit board 4 in which various electronic components 8 constituting the above are incorporated, so that the electronic components 8 on the printed circuit board 4 and the secondary winding have sufficient dimensions to maintain insulation. It is regulated by a special jig 7 for position regulation, and the magnetic core 5 is incorporated into the primary bobbin 1 and the secondary bobbin 2, and these are housed in an insulating case 6.

Problems to be Solved by the Invention In such a conventional configuration, it is generally possible to secure an insulation distance between the secondary winding to which a high voltage is applied and various electronic components 8 forming a rectifying or resonant circuit. is necessary. Therefore, there is a problem that the position regulation cannot be performed unless the jig 7 for position regulation as shown in FIG. 5 is used to regulate the insulation distance, and safety and reliability cannot be guaranteed.
Further, various electronic components 8 that form a rectifying or resonance circuit
A combination of a primary bobbin 1 in which a primary winding is wound on a printed circuit board 4 in which is mounted and a secondary bobbin 2 in which a secondary winding is wound can be mounted on the printed circuit board 4 without post-installation work. There was also a problem that it could not be done and the workability was very poor.

The present invention solves such a problem, and can easily position-regulate the insulation distance between various secondary electronic windings constituting a rectifying or resonance circuit and the primary winding, and
An object of the present invention is to provide a structure of a high-voltage transformer that can improve the workability of inserting a combination of secondary bobbins into a printed circuit board in a retrofitting operation.

Means for Solving the Problem In order to solve this problem, the present invention provides primary and secondary bobbins with position control projections respectively projecting from the terminals of the primary bobbin and secondary bobbin on the lead-out side of the bobbin. A primary winding and a secondary winding are wound around and combined with each other, and the above terminals are connected to a printed circuit board on which various electronic components constituting a rectifying or resonance circuit are incorporated, and the position regulating projections are applied to this printed circuit board. Set them so that they are in contact with each other and have sufficient dimensions to maintain insulation between the various electronic components on the printed circuit board and the secondary winding, and then install the magnetic cores in the primary and secondary bobbins and store them in an insulating case. It is composed.

Action With this configuration, a jig for exclusive use of position regulation was used to maintain a sufficient insulation distance between the secondary winding and various electronic components that make up the rectification or resonance circuit. It is possible to facilitate the position regulation by providing a position regulation projection on the terminal lead-out side of the and contacting it with the printed circuit board. Further, the combination of the primary and secondary bobbins can be simultaneously performed in the assembly process of inserting various electronic components into the printed circuit board, and the workability can be improved.

Embodiment FIG. 1 is a completed drawing of a high voltage transformer according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the same high voltage transformer. FIG. 3 is a perspective view of the coil portion, and will be described in detail in the embodiment shown in FIGS. In FIG. 2, a primary bobbin 11 wound with a primary winding and a secondary bobbin 12 wound with a secondary winding are combined, and the above bobbins are provided on the lead-out side of the terminals 13 of the primary bobbin 11 and the secondary bobbin 12. The position regulating protrusion 18 protruding from the
The arrangement is the third when the primary bobbin 11 and the secondary bobbin 12 are combined.
As shown in the figure, the terminals 13 are connected to the printed circuit board 14 in which various electronic components 17 forming a rectifying or resonance circuit are incorporated so that the terminals 13 can be balanced against the forces in the left-right and up-down directions. The protrusion 18 is brought into contact with the printed circuit board, and the distance between the various electronic components 17 on the printed circuit board 14 and the secondary winding is configured to be a sufficient size to maintain insulation between the two. A magnetic core 15 is built in the secondary bobbin 12, and these are housed in an insulating case 16.

As described above, according to the present invention, the high voltage transformer includes a primary bobbin wound with a primary winding, a secondary bobbin wound with a secondary winding combined with the primary bobbin, and the primary, secondary A printed circuit board incorporating an electronic component forming a rectifying or resonance circuit connected to each terminal of the next bobbin; and abutting the printed circuit substrate so as to separate the secondary winding from the electronic component. Position regulating protrusions provided on the lead-out sides of the terminals of the primary and secondary bobbins respectively so as to project from the primary and secondary bobbins, magnetic cores incorporated in the primary and secondary bobbins, and the primary and secondary bobbins. Since it is composed of an insulating case that houses the printed circuit board, the primary bobbin and the secondary bobbin are provided with position regulating protrusions, which are brought into contact with the printed circuit board to align the secondary winding to which high voltage is applied. Position control to maintain a sufficient insulation distance between various electronic parts that make up a diversion or resonance circuit is possible without using a jig for position control, improving workability and reducing costs. In addition, it will be excellent in safety and reliability. In addition, by providing three position regulating projections, it is possible to achieve a balance with respect to forces in the left-right and up-down directions, and it is possible to simultaneously perform the primary and secondary processes in the process of inserting various electronic components forming a rectifying or resonant circuit into a printed circuit board. It is possible to insert a combination of the next bobbins, there is no need for retrofitting work, the workability is improved, and it is possible to reduce the cost for reducing the number of steps.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a completed state of a high voltage transformer according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a high voltage transformer according to an embodiment of the present invention, and FIG. FIG. 4 is an exploded perspective view of a conventional high-voltage transformer, and FIG. 5 is a conventional high-voltage transformer position-regulating jig. It is a figure. 11 …… Primary winding bobbin, 12 …… Secondary winding bobbin, 13
...... Terminals for drawing out windings, 14 ...... Printed circuit boards incorporating various electronic components, 15 ...... Magnetic core, 16 ...... Insulation case, 17 ......
Electronic parts, 18 ... Protrusions for position regulation.

Claims (1)

[Claims] 1. A primary bobbin wound with a primary winding, a secondary bobbin wound with a secondary winding combined with the primary bobbin, and a rectifier connected to each terminal of the primary and secondary bobbins. Board incorporating electronic components constituting a circuit for resonance or resonance, and drawing out the terminals of each of the primary and secondary bobbins that abut the printed circuit board so as to separate the secondary winding from the electronic components. And a magnetic core incorporated in the primary and secondary bobbins, and an insulating case for accommodating the primary and secondary bobbins and the printed circuit board. High voltage transformer.