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Thermistor

一种热敏电阻器、电阻部的技术，应用在热敏电阻器、电阻器、不可调金属电阻器等方向，能够解决制造成本增加、模块大型化、结构复杂等问题，达到制造成本抑制、零件数量少、工作速度和工作精度高的效果

Inactive Publication Date: 2006-11-01
TYCO ELECTRONICS RAYCHEM BVBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the latter polymer PTC thermistor, which can be disconnected and connected at the desired timing, a heat source and a device for operating the heat source are required in addition to the former polymer PTC thermistor. There arises a problem that the structure becomes complicated and the manufacturing cost increases
In addition, there is a problem of increasing the size of the module due to the large number of parts

Method used

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Experimental program
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no. 1 Embodiment approach

[0023] exist Figure 1 ~ Figure 2 1st Embodiment of this invention is shown and demonstrated in .

[0024] exist Figure 1 ~ Figure 2 , shows a polymer PTC thermistor as an overcurrent protection element. The polymer PTC thermistor includes: 2 electrodes (1st, 2nd electrodes) 1, 2; a variable resistor installed between these two electrodes 1, 2, using temperature changes to change the resistance value Part 3; an electrode (third electrode) 4 that is not in contact with any of the electrodes 1 and 2; is integrally formed with the same material as the varistor part 3, and is in contact with the electrode 4. A current flows between the electrode 4 and the electrode 2 to generate heat to change the resistance value of the variable resistance part 3 in the heating part 5 . The varistor part 3 and the heat generating part 5 correspond to two non-overlapping parts of the conductive polymer 6 formed in a plate shape.

[0025] The conductive polymer 6 is rectangular and plate-like ...

no. 2 Embodiment approach

[0034] then, Figure 3 ~ Figure 5 The 2nd embodiment of this invention is shown and demonstrated in . In addition, the same code|symbol is attached|subjected to the component already demonstrated in the said embodiment, and description is abbreviate|omitted.

[0035] exist Figure 3 ~ Figure 5 Each figure in FIG. 1 shows a polymer PTC thermistor as an overcurrent protection element similarly to the first embodiment. This polymer PTC thermistor has the same rectangular and plate-shaped conductive polymer 6 as in the first embodiment, but in this embodiment, the variable resistance part 3 is arranged in the center, and two heat generating parts 5A, 5B are respectively provided on both sides thereof, and electrodes 4A, 4B as third electrodes are respectively provided on the respective heat generating parts 5A, 5B.

[0036] Most of the electrode 1 is arranged on one side of the central part of the variable resistance part 3 in the conductive polymer 6 ( image 3 The middle is ...

no. 3 Embodiment approach

[0040] then, Figure 6 ~ Figure 7 The 3rd embodiment of this invention is shown and demonstrated in . In addition, the same code|symbol is attached|subjected to the component already demonstrated in the said embodiment, and description is abbreviate|omitted.

[0041] exist Figure 6 ~ Figure 7 Each figure in FIG. 1 shows a polymer PTC thermistor as an overcurrent protection element similarly to the first and second embodiments. This polymer PTC thermistor is different from the above-mentioned embodiment in that it has a circular and plate-shaped conductive polymer 6, the variable resistance part 3 is arranged in the center, and the heat generating part 5C is arranged around it. Electrodes 4C serving as third electrodes are provided on both sides of the heat generating portion 5C.

[0042] The electrode 1 is arranged on one side of the central part constituting the variable resistance part 3 in the conductive polymer 6 ( Figure 6 On the upper surface side in the middle), t...

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Abstract

This thermistor is provided with a third electrode placed so that it is not in contact with either the first or second electrode, and with a heating part integrally formed with the same material as the variable resistance part and in contact with the third electrode, the heating part changing the resistance value of the variable resistance part by generating heat when current passes between the third electrode and either of the first or second electrode.

Description

technical field [0001] The present invention relates to a thermistor in which a resistance value between electrodes is changed by a change in temperature, thereby arbitrarily reducing the amount of conduction between the electrodes extremely. [0002] This application claims the priority of Japanese Patent Application No. 2003-330707 filed on September 22, 2003, the content of which is incorporated in this application. Background technique [0003] The polymer PTC thermistor as an overcurrent protection element is an element that turns on and off the current by using the positive resistance temperature characteristic (PTC: Positive Temperature Coefficient) of the conductive polymer that reduces the conductivity due to thermal expansion. . Conventional polymer PTC thermistors have a structure in which a conductive polymer is interposed between two electrodes. When the current required for thermal expansion of the conductive polymer flows between the two electrodes, or when p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/02H01C7/00
CPCH01C7/008H01C7/02
Inventor 小山洋幸佐藤隆
Owner TYCO ELECTRONICS RAYCHEM BVBA
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