US 11,289,289 B2Granted

Emergency stop switch

AssigneeNkk Switches Co., Ltd.

InventorJunya Takeshita

Life of this patent

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Abstract

The problem to be addressed is to provide a highly safe and compact switch that is adapted to improvements in portability, weight reduction and size reduction of machines, or the like. An operating part has a button covering the upper part of a cylindrical housing that receives a downward pushing operation and a rotational operation. A contact unit part has contacts which open by being coupled to the downward pushing operation of the button. A twisting coil spring is disposed on the interior of the button, one end being joined to the housing, and the other end being joined to the button. A latch part disposed to the interior of the twisting coil spring, has a plunger coil spring that expands and contracts in a direction perpendicular to the direction of the downward pushing operation, and when a downward pushing operation is performed on the button, causes a sliding rod to slide along an inner wall of the housing while being displaced in the direction of the downward pushing operation.

Claims3

Dependent claims

A switch comprising:

a cylindrical housing;
an operating part disposed at an upper region of the housing and including a button that accepts a pushing operation and a turning operation;
a contact unit part including a contact that separates in conjunction with the pushing operation of the button;
a twisting coil spring disposed inside the button, one end of the twisting coil spring being joined to the housing and another end of the twisting coil spring being joined to the button;
and
a latch part that includes a plunger and is disposed inside the twisting coil spring and that, when the pushing operation is performed on the button, displaces in a direction of the pushing operation while causing a portion of the plunger to slide along an inner wall of the housing and compressing the portion of the plunger in a direction perpendicular to the direction of the pushing operation,
wherein the portion of the plunger is an end portion of a sliding rod which is compressed by an elastic force of a coil spring in the direction perpendicular to the direction of the pushing operation, and
the portion of the plunger is disposed inside the twisting coil spring.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/651,696Filed 25 Sep 2018
Priority: JP JP2017-18953329 Sep 2017
Published: US 2020/0234895 A123 Jul 2020
Granted: 29 Mar 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H01H 25/008
Switches with compound movement of handle or other operating part: operating part movable both angularly and rectilinearly, the rectilinear…
H01H 3/022
Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch: emergency operating parts, e.g. for…
H01H 13/14
Movable parts; Contacts mounted thereon: operating parts, e.g. push-button
H01H 13/62
Having a single operating member: the contact returning to its original state upon manual release of a latch