High frequency coil

Details

Inventors: Toyoshima, Yohtaro; Sasaki, Yasuhiro; Uchida, Minoru;
Assignee: TDK Electronics Co., Ltd. (Tokyo, JP); NGK Spark Plug Co., Ltd. (Nagoya, JP)
Primary Examiner: Truhe; J. V.
Assistant Examiner: Steward; Susan
Attorney, Agent or Firm: Oblon, Fisher, Spivak, McClelland & Maier

A high frequency coil including an inductance device formed by fitting a pair of electrode caps at both ends of a ferrite magnetic core wound by a winding on a peripheral surface of the core; a heat resistant electric insulating coated layer formed on the peripheral surface of the inductance device and a heat resistant electric insulating resilient tube fitted onto the peripheral surface of the coated inductance device.

DETAILED DESCRIPTION It is an object of the present invention to improve the disadvantages of conventional high frequency coils for an ignition plug.
It is another object of the present invention to provide a high frequency coil which has a desired impact strength.
The foregoing and other objects of the present invention have been attained by providing a high frequency coil which comprises an inductance device formed by fitting a pair of electrode caps at both ends of a ferrite magnetic core wound by a winding on the peripheral surface of the core; a heat resistant electric insulating coated layer formed on the peripheral surface of the inductance device and a heat resistant electric insulating resilient tube fitted onto the peripheral surface of the coated inductance device.

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