JPH0648811Y2 - Transformer with winding shield - Google Patents

Description

[Detailed Description of Device] a. Purpose of the invention [Industrial application] The present invention relates to a transformer used in electronic equipment, and in a transformer in which an electromagnetic shield is provided in a winding, a structure in which an electromagnetic shield winding terminal can be processed by an automatic winding machine The present invention relates to a transformer with a winding shield.

[Conventional technology]

FIG. 3 shows the coil bobbin that constitutes the transformer in the conventional terminal treatment of the shield winding of the transformer provided with the electromagnetic shield. Like other transformers, the pin terminals are connected to the signal line embedded in the terminal block 3. 4 is used for connection. The electromagnetic shield is made by winding a winding similar to the signal wire on the signal wire, but connect the pin terminal 4 to both the winding start and the winding end, and only the winding start or the winding end to the pin terminal. The other winding terminal 15 is connected, insulated, fixed with an insulating tape 10 and wound into the winding.

In the former, two pin terminals are used for magnetic shielding, and a pin terminal may be insufficient in a transformer with many signal circuits. The latter needs to be covered with an insulating tape to cover the conductive part at the end of the winding terminal, and it is necessary to stop the machine temporarily for winding the insulating tape and winding the tape when using an automatic winding machine. However, there is a problem that the number of man-hours is required for the insulation treatment and it is difficult to apply the automatic winding.

[Problems to be solved by the device]

The present invention is a transformer for providing electromagnetic shielding by a winding, without using a pin terminal for a signal line, and in a shield winding whose one end is open, a taping treatment for covering the winding end. (EN) There is provided a winding shielded transformer having a structure capable of effectively using the board mounting surface of a coil bobbin and entwining and fixing the end of the shield winding by an automatic winding machine.

B. Configuration of the Invention [Means for Solving the Problems] In order to solve these problems, the present invention provides a standoff provided between the lower surface of the coil bobbin and the substrate surface to protect the winding end of the pin terminal from being twisted. Is a pin terminal that can be soldered, and a shield winding transformer with a structure in which the winding terminal of the shield winding is twisted to the pin terminal. This is a transformer with a winding shield that can be treated by brazing the terminals and fixed by soldering, without using extra pin terminals.

That is, the present invention has an electromagnetic shield on a tubular core of a coil bobbin having terminal blocks on both sides, and a plurality of pin terminals for integrally winding and soldering winding terminals to the terminal blocks and standoffs. In a winding shielded transformer formed by applying the target shield winding, part of the standoff of the terminal block is made of the same material as the pin terminal, the surface has solderability, and the height is the same as the standoff. I planted Nokarage standoff,
A transformer with winding shield, characterized in that winding ends of the shield winding are formed by soldering the winding standoffs.

[Action]

When an electromagnetic shield is applied to a transformer by a winding, one of the windings is incorporated into the ground terminal and the other is incorporated in the transformer in an open state. Conventionally, the open end of the winding is used to protect and secure the cut surface. Although it was stopped between the signal windings by taping on the winding, in the conventional structure, it was necessary to stop the self-winding machine and tap the winding end to the coil for taping. In order to remove the winding end of the pin terminal and protect the soldered portion, a pin terminal-shaped standoff is provided as part of the standoff that is usually attached to the board mounting surface of the transformer. By winding the one end open terminal around the sundoff pin terminal and soldering it, it is possible to protect the cut surface and fix the winding at the same time, and also stop the automatic winding machine during winding work. I was going Removing the ping operations to a homogeneous transformer efficiency and characteristics of the transformer winding operation.

〔Example〕

FIG. 1 is a perspective view of a coil bobbin 1 of a transformer with a winding shield according to the present invention, and FIG. 2 is a perspective view of a coil 2 in which the coil bobbin is provided with a winding shield.

The coil bobbin 1 used in the winding shielded transformer according to the present invention has the same height as the standoff 6 on the terminal block 3 having the pin terminals 4 and the standoffs 6 on both sides of the cylindrical winding core 11 around which the winding is wound. A peel-off standoff 5 for pulling up the end of the shield winding is attached. The stripping standoff 5 is made of the same material as that of the conventional pin terminal 4 and is solder-plated or tin-plated so that the shield winding end can be fixed by stripping soldering.

FIG. 2 shows a coil bobbin 1 in which a winding 7 is applied to a cylindrical winding core 11 to form a coil 2. The winding start of the shield winding starts from a conventional pin terminal 4 and one winding end is removed. Fasten the barge to the standoff 5. The winding terminals wound on the pin terminals 4 and the winding standoffs 5 are immersed in a solder bath and the winding terminals are respectively soldered and fixed, and then a magnetic core (not shown) is incorporated into the magnetic core insertion port 20 of the present invention. Use a transformer with a winding shield.

C. Effect of the Invention [Effect of the Invention] As described above, in the winding shielded transformer according to the present invention, the open side winding end of the shield winding is made of the same material as the conventional pin terminal at the standoff part on the coil bobbin terminal block. And, since the height of the standoff is the same as that of the standoff, the standoff is attached to the standoff so that it can be automatically wound using an automatic winding machine like other signal wire windings. Further, it is possible to provide a transformer with a winding shield that is highly reliable and does not require extra use of conventional pin terminals, and that allows uniform work.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a coil bobbin used in a transformer with a winding shield according to the present invention. FIG. 2 is a perspective view showing a coil of a transformer with a winding shield according to the present invention. FIG. 3 is a perspective view of a coil showing a conventional transformer with a winding shield. 1 ... coil bobbin, 2 ... coil, 3 ... terminal block, 4
...... Pin terminal, 5 ...... bare standoff, 6 ...... standoff, 7 ...... winding, 8 ...... shield winding winding start, 9
…… End of shield winding, 10 …… Insulating tape, 11 ……
Cylindrical winding core, 12 …… Tsuba, 15 …… Winding end, 20 …… Magnetic core insertion port.

Claims (1)

[Scope of utility model registration request] 1. An electromagnetic shield is provided on a tubular core of a coil bobbin having terminal blocks on both sides, and a plurality of pin terminals for winding and soldering winding ends to the terminal blocks and standoffs are integrally molded. In a winding shielded transformer formed by applying the target shield winding, part of the standoff of the terminal block is made of the same material as the pin terminal, the surface has solderability, and the height is the same as the standoff. A transformer with a winding shield, characterized in that the winding standoff is planted and the winding end of the shield winding is soldered to the above-mentioned standoff.