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Thermal protector and a method for reducing a contact resistance of same

A contact resistance and protector technology, which is applied to thermal switch components, contacts, circuits, etc., can solve the problem of increasing contact resistance

Inactive Publication Date: 2005-03-23
FURUKAWA ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when used for other purposes, the position of the contacts may shift due to various reasons such as release of residual stress or deformation of the movable piece, vibration from the installed device body, etc. during long-term use. The problem that the contact position is shifted and the contact resistance is increased, and it is hoped to solve these problems

Method used

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  • Thermal protector and a method for reducing a contact resistance of same
  • Thermal protector and a method for reducing a contact resistance of same
  • Thermal protector and a method for reducing a contact resistance of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0051] First, use figure 1 The heat-sensitive protector of the structure shown, carry out adopting the method of the present invention to carry out the heat-sensitive protector of activation treatment and the method for adopting the prior art to carry out the activation treatment of the heat-sensitive protector of the heat-sensitive protector of the activation treatment after the activation mark of the 1st contact Comparative test of area and contact resistance. Since the contact resistance varies depending on the material of the contacts, all contacts made of AgNi are used as the contact material.

[0052] In the activation treatment conditions shown in Table 1, according to the conditions of No.1 and No.2, and as each condition of Comparative Example No.10, 100 thermal protectors that carried out activation treatment were produced, and the contact resistance and the first thermal protector were measured. 1 The area of ​​the activation trace of the contact. Regarding the m...

Embodiment 2

[0055] Made in Ultrasonic Bonding figure 2 The heat-sensitive protector in the state of the housing 1 and the cover 3 of the heat-sensitive protector shown (the heat-sensitive protector without activation treatment), and after the housing 1 and the cover 3 are ultrasonically bonded, as shown in Table 1 100 thermal protectors (activation-treated thermal protectors) each subjected to activation treatment under the conditions of activation treatment No. 3 were subjected to drop and impact tests. The drop test was carried out by dropping from a height of 1.8 m 12 times in total by setting the six surfaces constituting the produced thermal protector as each drop surface, twice for each surface, and 12 times in total. For the impact test, put a specified number of heat-sensitive protectors in a metal cylinder with a length of 1m, cover both ends of the heat-sensitive protectors, alternate the ends up and down, and turn the heat-sensitive protectors in the metal cylinder 200 times a...

Embodiment 3

[0058] Making adopts the heat-sensitive protector identical with embodiment 1, after ultrasonic bonding casing 1 and cover body 3, press various activation conditions shown in table 1, has carried out the heat-sensitive protector of the activation treatment of contact surface, 100 each. Table 6 shows the results of measuring the contact resistance and the activation scar area of ​​the first contact in the same manner as in Example 1 and calculating the average values. The contact resistance and the activation mark area of ​​the first contact were also evaluated by the same method as above, and Table 6 shows the defect rate calculated as a defect when the contact resistance exceeds 10 mΩ. In the durability test 1, after the casing 1 and the cover 3 were assembled by ultrasonic bonding, the thermal protector in the activated state was subjected to a drop test and an impact test under the same conditions as in Example 2, and then The contact resistance value was obtained to obta...

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Abstract

A method for forming an activated trace on both of a first and second contact point surface or either a first or second contact point surface by applying vibration while applying an electric current, wherein a first contact point electrically is connected to a first external terminal and a second contact point electrically connected to a second external terminal being aligned opposed to said a first contact point in pair. And an electrical components such as a thermal protector, a cellular phone and a notebook personal computer in the like which adopted the process.

Description

technical field [0001] The present invention relates to a thermal protector used as a protective element for breaking circuits in various motors or electrical appliances to prevent damage and destruction caused by overcurrent or overheating, especially for portable phones or notebook computers, etc. Secondary batteries, small motors, automotive motors, thermal protectors used in DC circuits of chargers, fans of air conditioners, AC circuits of commonly used motors such as electric washing machines, and small contactors such as relay switches or reed switches. Point electrical components and application products of small electrical equipment using the electrical components. Background technique [0002] In recent years, electrical equipment such as mobile phones and notebook computers have been significantly reduced in size and high in performance, and thermal protectors used are also required to be further reduced in size and high in performance. [0003] Figure 5 A conven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H37/54H01H1/00H01H1/60H01H37/52
CPCH01H1/60H01H37/52H01H1/605
Inventor 丰崎孝一山本洁森井晓永井健史
Owner FURUKAWA ELECTRIC CO LTD