Resistor

• US 10,446,297 B2
• Filed: 02/20/2017
• Issued: 10/15/2019
• Est. Priority Date: 03/08/2016
• Status: Active Grant

• Current Assignee: KOA Corporation
• Original Assignee: KOA Corporation
• Inventors: Miyagawa, Masaki, Miyashita, Kyohei, Sakai, Hiroshi
• Primary Examiner(s): Lee, Kyung S
• Application Number:
  US16/083,088
• Publication Number:
  US 20190096549A1
• Time in Patent Office: 967 Days
• CPC Class Codes: H01C 1/02 Housing; Enclosing; Embedding; Filling the housing or enclosure
• CPC Class Codes: H01C 1/028 the resistive element being embedded in insulation with outer enclosing sheath
• CPC Class Codes: H01C 1/14 Terminals or tapping points or electrodes specially adapted for resistors in general H01R; Arrangements of terminals or tapping points or electrodes on resistors
• CPC Class Codes: H01C 1/148 the terminals embracing or surrounding the resistive element H01C1/142 takes precedence
• CPC Class Codes: H01C 7/00 Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material consisting of loose powdered or granular material H01C8/00; resistors having potential barriers, e.g. field-effect resistors, H01L29/00; semiconductor devices sensitive to electromagnetic or corpuscular radiation, e.g. photoresistors, H01L31/00; magnetic field controlled resistors H10N50/10; bulk negative resistance effect devices H10N80/00
• CPC Class Codes: H01R 11/12 End pieces terminating in an eye, hook, or fork
• CPC Class Codes: H01R 4/183 for cylindrical elongated bodies, e.g. cables having circular cross-section H01R4/01 takes precedence

Abstract

A power resistor has paired harness electric wires that have one end parts connected to a resistor substrate, and other end parts pass through an exterior material made of insulating resin and extend outward. Crimp terminals, which are means for reinforcing affinity between the coating material of the harness electric wires and the insulating resin, i.e., the exterior material and for maintaining adhesion, are formed on predetermined portions of the harness electric wires. As a result, a short and small power resistor suitable for an in-vehicle environment is provided.

Claims

1. A resistor comprising:

a resistor substrate that comprises on an insulating substrate, paired electrodes and a resistive element, which is connected to the respective paired electrodes,

an insulating exterior material covering at least the upper and the side surface of the resistor substrate, and

a pair of coated electric wires that have one end parts connected to the respective paired electrodes, pass through the insulating exterior material and extend outside;

wherein the pair of coated electric wires are harness electric wires made of metal conductors which are covered by an insulating coating material, each of which extends outside of the exterior material in the same direction, and connection terminals are crimped to other end parts thereof, respectively; and

wherein the resistor has a metal maintainer, on respective predetermined portions of the pair of coated electric wires, crimped to the pair of coated electric wires for maintaining adhesion between the insulating coating material and the insulating exterior material.

2. The resistor according to claim 1, wherein the metal maintainer for maintaining adhesion are pipe members, each of which has a circumferential projection, and allows the pair of coated electric wires to pass through at the respective predetermined portions and to be crimped on the predetermined portions by applying a pressure from the circumference.

3. The resistor according to claim 1, wherein the predetermined portions are either borders between portions of the pair of coated electric wires covered by the exterior material and portions exposed to the outside of the exterior material or portions covered by the exterior material, separated from the one end parts of the pair of coated electric wires.

4. A resistor comprising:

a resistor substrate that comprises on an insulating substrate, paired electrodes and a resistive element, which is connected to the respective paired electrodes,

an insulating exterior material covering at least the upper and the side surface of the resistor substrate, and

a pair of coated electric wires that have one end parts connected to the respective paired electrodes, pass through the insulating exterior material and extend outside;

wherein the pair of coated electric wires are harness electric wires made of metal conductors which are covered by an insulating coating material, each of which extends outside of the exterior material in the same direction, and connection terminals are crimped to other end parts thereof, respectively; and

wherein metal terminals are attached to the respective end parts of the pair of coated electric wires, comprising junctions joined together with the electrodes partially covering the metal conductors at portions where the coatings of the other end parts are removed by a predetermined length, and crimping portions where the insulating coating material is crimped at respective borders with the respective tip parts of the pair of coated electric wires, where the junctions have at least four contacts.

5. The resistor according to claim 4, wherein each of the contacts has a round shape in a plan view.