Coil resistor and method for manufacturing same
First Claim
1. A coil resistor made by attaching a cap electrode on either end part of a resistive element formed by winding a resistance wire around the circumference of a core that is formed by twisting together fibrous insulating material, comprising a plurality of notches of a predetermined length formed along the axis of the resistive element on rims of either end surface of the resistive element.
1 Assignment
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Accused Products
Abstract
A single or multiple cutters are pressed against end surfaces of a resistive element so as to form a plurality of notches in rims of the end surfaces. At this time, notches are formed such that notch depth at the end surfaces of the resistive element toward the axis center is smaller than notch length from the end surfaces of the resistive element to the axis. This allows easy cutting and removal of the resistance wire at the resistive element ends of a coil resistor, etc., and prevention of fraying of a wound wire at the resistive element ends.
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Citations
18 Claims
- 1. A coil resistor made by attaching a cap electrode on either end part of a resistive element formed by winding a resistance wire around the circumference of a core that is formed by twisting together fibrous insulating material, comprising a plurality of notches of a predetermined length formed along the axis of the resistive element on rims of either end surface of the resistive element.
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7. A manufacturing method for a coil resistor comprising the steps of:
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twisting together fibrous insulating material to form a long core; winding a resistance wire around the circumference of the core; cutting at a predetermined length the core around which the resistance wire is wound, so as to form a resistive element; forming a plurality of notches of a predetermined length along the axis of the resistive element in rims of either end surface of the resistive element; and
attaching a cap electrode on either end part of the resistive element. - View Dependent Claims (8, 9, 10, 11, 16, 17, 18)
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Specification