Rotational operation type switch

Patent metadata

Field	Value
Publication number	US-9786453-B2
Application number	US-201514936115-A
Country	US
Kind code	B2
Filing date	Nov 9, 2015
Priority date	Jun 21, 2013
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A rotational operation type switch includes a frame; a rotational operation button rotatably supported on the frame for rotational operation; a switching contact mechanism disposed below the operation button to face the operation button; and an operation mechanism disposed between the operation button and the switching contact mechanism, to switch the switching contact mechanism in conjunction with the rotational operation of the operation button. The switching contact mechanism includes a printed circuit board, a plurality of fixed contact electrodes disposed on the printed circuit board and spaced a predetermined distance away from each other, and a movable contact having a disc spring shape and disposed bridging between the plurality of fixed contact electrodes. The movable contact deforms to contact and separate from the fixed contact electrodes and switches an electrical connection between the fixed contact electrodes.

First claim

What is claimed is:

1. A rotational operation type switch, comprising:
a frame;
a rotational operation button rotatably supported on the frame for rotational operation;
a switching contact mechanism disposed below the operation button to face the operation button; and
an operation mechanism including a cam, and disposed between the operation button and the switching contact mechanism, to switch the switching contact mechanism in conjunction with the rotational operation of the operation button,
wherein the switching contact mechanism includes a printed circuit board, a plurality of fixed contact electrodes disposed on the printed circuit board and spaced at a predetermined distance away from each other, and a movable contact having a disc spring shape and disposed bridging between the plurality of fixed contact electrodes,
the movable contact deforms to contact with and separate from the plurality of fixed contact electrodes and switches an electrical connection between the plurality of fixed contact electrodes, and
the operation mechanism includes an annular cam formed with a cam surface on a rear surface of the operation button to face the switching contact mechanism, the cam surface undulating in a circumferential direction of the operation button, and a push bar urged by a spring so that one end face thereof abuts against the cam surface and another end face thereof operates the switching contact mechanism.

2. The rotational operation type switch according to claim 1 , wherein the operation mechanism is structured to switch the switching contact mechanism one time for each rotation of the operation button for a predetermined rotation angle, and to switch the switching contact mechanism for a plurality of times for one revolution of the operation button.

3. The rotational operation type switch according to claim 1 , further comprising a switching contact mechanism switching detection circuit connected to the switching contact mechanism, for counting number of switching of the switching contact mechanism and distinguishing rotational operation amounts of the operation button.

4. A rotational operation type switch, comprising:
a frame,
a rotational operation button rotatably supported on the frame for rotational operation,
a switching contact mechanism disposed below the operation button to face the operation button,
an operation mechanism including a cam, and disposed between the operation button and the switching contact mechanism, to switch the switching contact mechanism in conjunction with the rotational operation of the operation button,
a plurality of locking holes each being formed on a rear surface of the operation button at a predetermined rotation angle,
a locking member to engage with the plurality of locking holes, and
a locking member holding portion holding the locking member through a spring provided at one position of the frame to engage the plurality of locking holes of the operation button,
wherein the switching contact mechanism includes a printed circuit board, a plurality of fixed contact electrodes disposed on the printed circuit board and spaced at a predetermined distance away from each other, and a movable contact having a disc spring shape and disposed bridging between the plurality of fixed contact electrodes, and
the movable contact deforms to contact with and separate from the plurality of fixed contact electrodes and switches an electrical connection between the plurality of fixed contact electrodes.

5. The rotational operation type switch according to claim 4 , wherein a front surface of the operation button is provided with finger-hook holes, and
each of the finger-hook holes is formed at a rotation angle corresponding to that of each of the plurality of locking holes.

Assignees

• Fuji Electric Fa Conponents & Systems Co Ltd
• Chichibu Fuji Co Ltd
• Fuji Electric Fa Components & Systems Co Ltd

Inventors

• Takano Yoshihiro
• Machida Noriyoshi

Classifications

• H01H19/11

  with indexing means · CPC title

• H01H19/63

  Contacts actuated by axial cams {(H01H19/6355 takes precedence)} · CPC title

• H01H1/24

  with resilient mounting · CPC title

• H01H19/48 Primary

  having only axial contact pressure · CPC title

• H01H19/585 Primary

  provided with printed circuit contacts · CPC title