JPH077121U - Thin transformer - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] To provide a base with a thin transformer / choke coil terminal that has a sufficient insulation distance to ensure insulation and passes the specified withstand voltage sufficiently. [Structure] A base 1 with terminals for a thin transformer / choke coil, which is provided with a core insulating cover that covers the central portion of the base, and has four coil guide collars 13, a core insulating collar 12, and a core middle leg. It is a cover for core insulation of a base with terminals of a thin transformer / tooke coil that covers the insulating collar 4, the core central guide collar, and the central hole 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a base with a terminal for a transformer / choke coil, and particularly to a core insulating cover for a base of a thin transformer / choke coil that has an insulating property between a magnetic core having a laminated structure and a coil portion, which is effective for thinning.

[0002]

[Prior art]

 The structure of a conventional thin transformer base of this type is shown in FIGS. In FIG. 4 and FIG. 5, the electric power of the magnetic cores 9 and 10 and the central hole 7 in which the middle legs 11 of the split type magnetic cores 9 and 10 are installed in the center of the rectangular flat base 21 made of an electric insulating material. A core middle foot insulating collar 4 and a core center guide collar 5 are provided around the outer core insulating flanges 12, coil guide collars 13, and the center hole 7 for insulation, and multiple core insulating flanges are provided on opposite sides in the longitudinal direction. A base 21 is formed by implanting individual terminals 8. The thin transformer is a combination of a base 21, a single-turn coil copper plate 14 with thin insulating films 15 and 16 of an electrically insulating film, and a plurality of air-core coils 17 in which thin wires are wound in a spiral shape, and has a higher relative magnetic permeability in both upper and lower directions. Insert the middle legs 11 of the E-shaped magnetic cores 9 and 10 having the characteristics into the center hole 7 of the base 21 and butt the joint surfaces together, and then assemble the magnetic cores by bonding or fixing them with metal fittings, taping, etc. The one-turn coil copper plate 14 and the air-core coil 17 are electrically connected by soldering, welding or the like to form a thin transformer.

[0003]

[Problems to be solved by the device]

 In the conventional transformer / choke coil with such a thin laminated structure, air core coils forming a plurality of circuits are laminated, and the lead wire ends are directly connected to the terminals provided on the base. It was fixed with solder. Due to the market demand for thinner products, it is not possible to secure a large distance between the laminated coil section and the magnetic core, resulting in a smaller insulation distance and failure to withstand the specified withstand voltage, causing a withstand voltage failure. There was a problem to do.

In order to solve these problems, according to the present invention, after a coil is laminated on the base of a thin transformer / choke coil, a core insulating cover is attached to the upper center of the base so as to cover the coil. It is designed to incorporate a magnetic core after that, and its purpose is to solve the problem of high breakdown voltage by providing a core insulating cover for a transformer / choke coil having a laminated structure.

[0005]

[Means for Solving the Problems]

 The present invention is a 1-turn coil copper plate with a terminal base provided with a flange for insulating the central hole into which the middle leg of the split E-shaped magnetic core is installed in the center of a rectangular flat plate made of an electrical insulating material. A thin transformer in which a spiral type air-core coil is laminated with an insulator interposed therebetween and a split-type E-type magnetic core is incorporated and formed in the central hole. It consists of a coil guide collar that guides the coil to be mounted, a core insulating collar that insulates the core, and a lid that mounts the E-shaped core while covering the core midfoot insulating collar that attaches and insulates the core midfoot. It is a thin transformer that is characterized.

[0006]

[Action]

 As shown in FIG. 1, the core insulating cover has a lid-like shape and includes a core guide 26, a center hole guide groove 23, an outlet 20 and a cover guide 25. 13, the core insulating flange 12, the core midfoot insulating flange 4, and the core central guide flange 5 are covered. The E-shaped core is mounted from above and below this core insulation cover. With such a configuration, the insulation distance between the coil and the magnetic core can be secured and the specified withstand voltage can be passed.

[0007]

【Example】

 FIG. 1 is a perspective view showing an insulating cover and a base with terminals of the present invention. FIG. 2 is a perspective view of a terminal-equipped base to which the core insulating cover of the embodiment of the present invention is attached. FIG. 3 is a perspective view showing a state in which the E-shaped core is set on the terminal-equipped base equipped with the insulating cover of the present invention.

The base with a terminal of the present invention is used for a thin transformer choke coil or the like. The E-type ferrite core, which is a magnetic core, is mounted so as to sandwich the base with terminals. As shown in FIG. 1, the terminal-equipped base is a rectangular flat plate-shaped base 1 made of an electrically insulating material, and the split type magnetic cores 9 and 10 (see FIG. 3) are assembled at the center of the base. In order to electrically insulate the center hole 7 and the magnetic core to be inserted, a core insulating collar 12, a coil guide collar 13 on both outer sides, and a core middle foot insulating collar 4 and a core central guide collar 5 are provided around the center hole 7. It is provided. In addition, a plurality of terminals 8 are planted on opposite sides in the longitudinal direction.

The core insulating cover 22 is provided at the center of the base with terminals, that is, the four coil guide flanges 13, the core insulating flange 12, the core midfoot insulating flange 4, the core central guide flange 5, and the central hole 7. It is installed so as to cover and.

The core insulating cover 22 is mounted on the terminal-equipped base by fully covering the central portion of the terminal-equipped base as described above, and the shape of the core-insulating cover 22 covers the terminal-equipped base. It has a lid-like shape. In the core insulating cover 22, the two core guides 26 have cover guides 25 at both ends thereof so that an E-shaped magnetic core can be mounted, and the cover guides 25 have four coil guide collars 13. Is a lid for covering the coil, and has a lead-out port 20 for pulling out the end of the coil. The outlet port 20 is an open port that is widely opened to release the heat generated by the coil or the like.

FIG. 2 shows a state where the core insulating cover 22 covers the central portion of the terminal-equipped base. Further, the core insulating cover 22 covers the central hole of the base, forms a central hole guide groove 23 into which the core foot is inserted, and forms a step between the core insertion groove 3 and the cover guide 25 to form an E-shape. A center hole guide groove 23, a cover guide, and a core guide 26 are provided so that the magnetic core can be mounted. The lead-out port 20 pulls out the terminal of the coil copper plate 14 from the terminal.

As shown in FIG. 3, in a thin transformer, a base 1 with a terminal mounted with a coil copper plate, an insulating film, an air-core coil, etc. is covered with a core insulating cover 22, and two E-shaped magnetic cores 9, 10 are provided. It becomes a transformer and choke coil by mounting.

[0013]

[Effect of device]

 As described above, by covering the core insulation cover on the base with the terminals of the thin transformer choke coil that is formed by stacking the air core coils of multiple circuits, the specified withstand voltage and insulation can be secured, and the thin transformer choke coil can be secured. Was able to improve the quality of.

[Brief description of drawings]

FIG. 1 is a perspective view showing an insulating cover and a base with terminals of the present invention.

FIG. 2 is a perspective view of a base with a terminal equipped with an insulating cover according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a state in which an E-shaped magnetic core is mounted on a base with a terminal equipped with an insulating cover of the present invention.

FIG. 4 is a perspective view of a conventional base with terminals.

FIG. 5 is an exploded perspective view of a conventional base with terminals.

[Explanation of symbols]

 1 Base with Terminal 2 Groove 3 Core Insertion Groove 4 Core Middle Foot Insulation Tsuba 5 Core Center Guide Tsuba 6 Core Guide Tsuba 7 Center Hole 8 Terminal 9 Magnetic Core 10 Magnetic Core 11 Middle Foot 12 Core Insulation Tsuba 13 Coil Guide Tsuba 14 Coil Copper Plate 14a Terminal hole 15 Insulating film 16 Insulating film 17 Air core coil 19 Guide 20 Outlet port 21 Base 22 Core insulating cover 23 Center hole guide collar 25 Cover guide 26 Core guide

Claims (1)

[Scope of utility model registration request] 1. A one-turn coil in a base with a terminal provided with a flange for insulating the central hole into which the middle leg of the split type E-shaped magnetic core is incorporated in the center of a rectangular flat plate made of an electric insulating material. A thin transformer in which a copper plate and an air-core coil formed in a spiral shape are laminated by interposing an insulator, and a split type E-type magnetic core is incorporated and formed in the central hole. From the lid that mounts the E-shaped core while covering the coil guide collar that guides the coil to be mounted, the core insulating collar that insulates the core, and the core midfoot insulating collar that mounts and insulates the core middle foot. A thin transformer characterized by