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Title:
BREAKER, SAFETY CIRCUIT, AND SECONDARY BATTERY PACK
Document Type and Number:
WIPO Patent Application WO/2019/230751
Kind Code:
A1
Abstract:
A breaker 1 comprises: a fixed piece 2 having a fixed contact 21; a movable piece 4 that has an elastically deformable elastic portion 44 and a movable contact 41 at the leading end part of the elastic portion 44, and presses the movable contact 41 to come in contact with the fixed contact 21; a thermally responsive element 5 that deforms with a change in temperature to thereby transition the movable piece 4 from the conduction state to the cutoff state; and a case 10 that stores the fixed piece 2, the movable piece 4, and the thermally responsive element 5. The movable piece 4 is cantilevered by the case 10 near the base end part 44s of the elastic portion 44. The elastic portion 44 includes a first narrow width portion 45 that has a smaller width W than the base end part 44s in the transverse direction D1 perpendicular to the longitudinal direction D1 of the elastic portion 44. The first narrow width portion 45 has an arc-shaped contour 46 in plan view as seen along the thickness direction of the elastic portion 44.

Inventors:
MIYATA KEITARO (JP)
Application Number:
PCT/JP2019/021184
Publication Date:
December 05, 2019
Filing Date:
May 29, 2019
Export Citation:
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Assignee:
BOURNS KK (JP)
International Classes:
H01H37/54
Foreign References:
JP2016035822A2016-03-17
JPH0193019A1989-04-12
JP2017103118A2017-06-08
Attorney, Agent or Firm:
SUMITOMO SHINTARO (JP)
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