US 10,770,245 B2Granted

Contact structure for switch, trigger switch and electric power tool

AssigneeOMRON Corporation

InventorsTaiki Koyama, Shigenobu Kishi

Life of this patent

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Abstract

The switch opening-closing mechanism, which makes it possible to increase a contact force so as to improve a vibration resistance, includes a sliding part, a second movable piece, and a second fixed contact. In a case where an amount of movement of a sliding part reaches a second retraction amount, the second movable piece comes into contact with the second fixed contact due to a spring force applied to the second movable piece. In a case where the amount of movement of the sliding part reaches a third retraction amount which is larger than a second retraction amount, the sliding part presses the second movable piece against the second fixed contact.

Claims14

Dependent claims

A switch contact structure comprising:

an operation section;
a first movable contact member, the first movable contact member including an elastic member;
and
a first counter contact member configured to face the first movable contact member,
wherein the operation section is configured such that:
in a case where an amount of movement of the operation section reaches a first movement amount, the first movable contact member coming into contact with the first counter contact member due to a spring force applied to the first movable contact member, and
in a case where the amount of movement of the operation section reaches a second movement amount which is larger than the first movement amount, the operation section comes into contact with the elastic member, the operation section pressing the first movable contact member so as to cause the elastic member to elastically deform, and the operation section pressing the first movable contact member against the first counter contact member.

4 more elements

A switch contact structure comprising:

an operation section;
a first movable contact member;
and
a first counter contact member configured to face the first movable contact member,
the first movable contact member including an elastic member,
wherein the operation section is configured such that:
in a case where an amount of movement of the operation section reaches a first movement amount, the first movable contact member coming into contact with the first counter contact member due to a spring force applied to the first movable contact member, and
in a case where the amount of movement of the operation section reaches a second movement amount which is larger than the first movement amount, the operation section pressing the first movable contact member so as to cause the elastic member to elastically deform, and the operation section pressing the first movable contact member against the first counter contact member, and
wherein the elastic member being a flat spring.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/347,293Filed 19 Oct 2017
Priority: JP 2016-25577928 Dec 2016
Published: US 2019/0279831 A112 Sep 2019
Granted: 8 Sep 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H01H 9/06
Bases, casings, or covers: casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle…
H01H 13/64
Having a single operating member: wherein the switch has more than two electrically distinguishable positions, e.g. multi-position push-button…
B25F 5/00
Details or components of portable power-driven tools not particularly related to the
H01H 1/50
Contacts: means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts…

Family

US 2019/0279831 A1Pre-grant publication · published 12 Sep 2019
US 10,770,245 B2This patent

From the US filing history. Foreign family members aren’t listed.

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