JPH0714621U - Converter transformer - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the dimensional accuracy and strength of terminals by attaching terminals with board fixing pieces to boards with slits for converter transformers used in various video equipment, industrial equipment, etc. To aim. [Structure] A substrate fixing piece 15c inserted into a slit 12a and held by a substrate 12 having a slit 12a and a first
Lead holding piece 15a and second lead holding piece 15b
The terminal 15 connected to the external connection terminal 15d with the first and second lead holding pieces 15a and 15b.
A converter transformer in which the dimensional accuracy and strength of the terminal 15 are improved by holding the lead-out portion 14 of No. 3 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a converter transformer used for various video equipment, industrial equipment, and the like.

[0002]

[Prior art]

 In recent years, the frequency of converter transformers has been increasing with the aim of downsizing, and we are aiming to make them thinner by using spiral windings and printed coils in order to make them particularly thin. When using the spiral winding, the lead wire is wound around the terminal pin for connection.

A conventional converter transformer will be described below. FIG. 18 shows a perspective view of a conventional converter transformer. In FIG. 18, 1 is a magnetic core made of EE-type or EI-type ferrite, 2 is a coil, 3 is a substrate on which the coil 2 is formed, 4 is a lead portion pulled out from the coil 2, and 5 is a terminal pin.

The assembly of the converter transformer configured as described above will be described below.

First, a coil 2 in which a conductive wire having an insulating film is wound is mounted on a substrate 3 on which a coil 6 is formed by printing, and a lead portion pulled out from the coil 2 is attached to a terminal pin 5 embedded in the substrate 3. 4 is wound, and finally, the coil 1 is assembled with the magnetic core 1.

[0006]

[Problems to be solved by the device]

 However, the above-mentioned conventional configuration has a problem that when the converter transformer is mounted on a printed circuit board, the terminal pin 5 cannot have stable dimensional accuracy.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a converter transformer with improved dimensional accuracy and strength when mounted on a printed circuit board.

[0008]

[Means for Solving the Problems]

 In order to solve this problem, the converter transformer of the present invention comprises a terminal having a board fixing piece on a board having a slit, and connecting the lead-out portion of the coil installed on the board to a lead wire holding piece. It is designed to improve dimensional accuracy and strength.

[0009]

[Action]

 With this configuration, the dimensional accuracy and strength of the terminal, which was unstable due to the use of the thin substrate, is improved, and the lead-out portion can be easily connected.

[0010]

【Example】

 Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a converter transformer according to the present invention, FIG. 2 is a front view of a substrate having a slit, and FIGS. 3 to 10 are assembly views of the terminal portion.

1 to 10, 11 is an EE-type or EI-type magnetic core made of ferrite or the like, 12 is a substrate having a plurality of slits 12a at an edge portion, and a spiral print coil 12b, and 13 is A coil obtained by spirally winding a conductor having a single-layer or multi-layer insulating film, 14 is a lead-out portion of the coil 13, 15 is a terminal, 15a is a first lead holding piece, 15b is a second lead holding piece, and 15c is A board fixing piece, 15d, is an external connection terminal.

The converter transformer configured as described above will be described below. First, according to this embodiment, the substrate 12 having the slit 12a, the first lead holding piece 15a provided by folding back the tip and the second lead holding piece 15b and the external connection terminal 15d at the rear end are provided. A board fixing piece 15c, which is inserted into the slit 12a of the board 12 and held, is provided between the terminal 15 and the terminal 15, and the lead-out portion 14 is held by the first and second lead holding pieces 15a and 15b. As a result, the lead-out portions 14 from the coil 13 composed of spiral windings arranged and coupled on both sides of the substrate 12 can be easily connected on their respective surfaces, and if they are connected to the same terminal, they can be electrically connected and unstable. However, the dimensional accuracy of the terminal 15 is improved.

(Second Embodiment) A second embodiment of the present invention will be described below. 11 to 17 are assembly drawings of the terminal portion showing the second embodiment. 11 to 17, 15a is a first lead holding piece, 15b is a second lead holding piece, 15c is a board fixing piece, and 15d is an external connection terminal. The above is the same as that of the first embodiment. is there. The difference from the configuration of the first embodiment is that an opening 16 is provided in a substrate 12 having a slit 12a, a substrate fixing piece 15c inserted and held in the slit 12a of the substrate 12 is provided at the tip, and the first lead The point is that the second lead holding piece 15b and the external connection terminal 15d are provided at the rear end by folding back together with the holding piece 15a.

As described above, it has the board fixing piece 15c inserted into the slit 12a of the board 12 at the front end, and is folded back together with the first lead holding piece 15a to pass through the opening 16 and the second lead holding piece at the rear end. The dimensional accuracy of the terminal 15 is further improved by including the piece 15b and the external connection terminal 15d, which are held by the board fixing piece 15c, and the lead portion 14 is held by the first and second lead holding pieces 15a and 15b. The strength increases.

[0015]

[Effect of device]

 As described above, the present invention realizes a converter transformer in which dimensional accuracy and strength of an unstable terminal are improved by using a thin substrate, and the number of man-hours can be reduced because the drawer part can be easily connected. It is possible.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a converter transformer of the present invention.

FIG. 2 is a front view of a substrate on which a coil is formed in the example.

FIG. 3 is a development view of terminals in the same embodiment.

FIG. 4 is a front view of a terminal in the same embodiment.

FIG. 5 is a front view of the terminal after bending of the embodiment.

FIG. 6 is a plan view of a slit portion of the substrate in the example.

FIG. 7 is a perspective view showing a combination of a board and terminals according to the embodiment.

FIG. 8 is a front view of the same.

FIG. 9 is a front view showing a state in which the lead wires are connected.

FIG. 10 is a perspective view of the same.

FIG. 11 is a development view of terminals of another embodiment.

FIG. 12 is a front view of the terminal in a bent state.

FIG. 13 is a plan view of a substrate used in the same example.

FIG. 14 is a perspective view of a state in which the terminal and the board are combined.

FIG. 15 is a front view of the same.

FIG. 16 is a front view showing a state in which the leader line is connected.

FIG. 17 is a perspective view of the same.

FIG. 18 is a perspective view of a conventional converter transformer.

[Explanation of symbols]

 11 magnetic core 12 substrate 12a slit 12b printing coil 13 winding 14 lead wire 15 terminal 15a first lead holding piece 15b second lead holding piece 15c board fixing piece 15d external connection terminal 16 opening

Claims (2)

[Scope of utility model registration request] 1. A substrate having a slit and a printed coil,
A board fixing piece that is inserted into a slit of the board and held between a first lead holding piece provided by folding back the tip and a terminal having a second lead holding piece and an external connection terminal at the rear end. A converter transformer in which a terminal for holding a lead wire of a coil formed of a winding arranged on a substrate is provided on the first and second lead holding pieces, and a magnetic core is incorporated in the substrate. 2. A substrate having a slit and an opening, and a substrate fixing piece which is inserted into and held by the slit of the substrate at a tip thereof, and is folded back together with the first lead holding piece through the opening to a rear end. 2. The converter transformer according to claim 1, further comprising a second lead holding piece and an external connection terminal, the first and second lead holding pieces having a terminal for holding a lead wire of a coil made of a winding.