Disconnecting switch

Patent metadata

Field	Value
Publication number	US-9336970-B2
Application number	US-201214349949-A
Country	US
Kind code	B2
Filing date	Oct 12, 2012
Priority date	Oct 13, 2011
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

A disconnecting switch includes a contact part that includes a stationary contact and a movable contact, a shaft that moves the movable contact relative to the stationary contact, an open/close mechanism part that moves the shaft back and forth freely between a closed contact position at which the movable contact contacts with the stationary contact and an open contact position at which the movable contact is separated from the stationary contact, and a housing that houses at least the contact part and the shaft. The open/close mechanism part includes an operation lever, an arm that rotates according to an operation of the operation lever to move the shaft between the open contact position and the closed contact position, and a wheel rotatably attached to the housing. The arm has a rotation slot in which the wheel is placed so that the wheel moves when the arm rotates.

First claim

The invention claimed is:

1. A disconnecting switch comprising:
a contact part that includes a stationary contact and a movable contact configured to be brought into contact with and separate from the stationary contact freely;
a shaft configured to move the movable contact back and forth freely relative to the stationary contact;
an open/close mechanism part configured to move the shaft back and forth freely between a closed contact position at which the movable contact is in contact with the stationary contact and an open contact position at which the movable contact is out of contact from the stationary contact; and
a housing in which at least the contact part and the shaft is housed, wherein
the open/close mechanism part includes an operation lever which is disposed so that an operation portion thereof protrudes outward from the housing, an arm configured to rotate according to an operation of the operation lever to move the shaft between the open contact position and the closed contact position, and a wheel which is rotatably attached to the housing, and
the arm is provided with a rotation slot in which the wheel is placed so that the wheel moves when the arm rotates.

2. The disconnecting switch according to claim 1 , wherein
a fusion detection part configured to detect a fusion of the contact part is constituted by the operation lever, the arm, and the wheel, and
the wheel is brought into contact with a side wall of the rotation slot and restricts a rotational movement of the arm at an intermediate position when the arm rotates from an ON position to an OFF position in a state where the contact part is fused, and thereby the fusion detection part detects the fusion of the contact part.

3. The disconnecting switch according to claim 1 , wherein the rotation slot is provided with an engaging protrusion that engages with the wheel in a state where the shaft is in the closed contact position.

4. The disconnecting switch according to claim 1 , wherein the shaft is directly connected to the arm.

5. The disconnecting switch according to claim 1 , wherein
the shaft includes a first end and a second end,
the arm is rotatably connected to the first end of the shaft via a support shaft,
the rotation slot includes a first end region and a second end region, and a distance between the first end region of the rotation slot and the support shaft is different from a distance between the second end region of the rotation slot and the support shaft, and
a relative distance between the wheel and the support shaft changes according to a movement of the wheel between the first end region and the second end region within the rotation slot, and thereby a rotation of the arm is converted into a movement of the shaft between the open contact position and the closed contact position.

6. The disconnecting switch according to claim 2 , wherein the rotation slot is provided with an engaging protrusion that engages with the wheel in a state where the shaft is in the closed contact position.

7. The disconnecting switch according to claim 2 , wherein the shaft is directly connected to the arm.

8. The disconnecting switch according to claim 3 , wherein the shaft is directly connected to the arm.

9. The disconnecting switch according to claim 6 , wherein the shaft is directly connected to the arm.

Assignees

• Panasonic Corp
• Panasonic Ip Man Co Ltd

Inventors

• Koeda Ryousuke
• Watanabe Shingo

Classifications

• H01H31/24 Primary

  with rectilinearly-movable bridging contact · CPC title

• H01H1/20

  Bridging contacts {(for circuit breakers H01H73/045)} · CPC title

• H01H21/22 Primary

  Operating parts, e.g. handle · CPC title

• H01H9/16

  Indicators for switching condition, e.g. "on" or "off" · CPC title

• H01H3/42

  using cam or eccentric · CPC title