Circuit interrupter
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsYoshihisa Fukuda, Shinya Kimoto, Kenji Kanematsu, Kazuhisa Kinoshita, Masato Nakamura
Life of this patent
Estimating the term…
Abstract
A circuit interrupter includes: a first fixed terminal including a first fixed contact; a movable contactor which is formed as a separate part from the first fixed terminal and includes a first movable contact; a holding unit configured to hold the movable contactor so that the first movable contact is connected to the first fixed contact; and a squib configured to generate gas by combustion. In the circuit interrupter, pressure of the gas generated by the squib causes movement of the movable contactor in a direction away from the first fixed terminal so that the first movable contact is separated from the first fixed contact.
Claims15
A circuit interrupter, comprising:
- a fixed terminal including a fixed contact;
- a movable contactor that is formed as a separate part from the fixed terminal and includes a movable contact;
- a sleeve including a first cylindrical portion and a second cylindrical portion, an inner diameter of which is smaller than an inner diameter of the first cylindrical portion;
- a piston located in the sleeve, and including a base and a cylinder, an outer diameter of which is smaller than an outer diameter of the base;
- and
- a squib configured to generate gas by combustion,
- wherein the inner diameter of the second cylindrical portion is smaller than an outer diameter of the base of the piston,
- when the squib generates the gas, the piston moves down so that the cylinder moves in the sleeve in order of the first cylindrical portion of the sleeve and the second cylindrical portion of the sleeve,
- movement of the cylinder causes movement of the movable contactor in a direction away from the fixed terminal so that the movable contact is separated from the fixed contact, and
- the movement of the cylinder is stopped by the base being held on a sidewall of the second cylindrical portion, and
- wherein the second cylindrical portion is formed in a tapered shape with a smaller inner diameter toward the down side.
A circuit interrupter, comprising:
- a fixed terminal including a fixed contact;
- a movable contactor that is provided below the fixed contact and includes a movable contact;
- a squib configured to generate gas by combustion;
- a piston that pushes the movable contactor in a direction away from the fixed terminal when the squib generates the gas;
- a sleeve that arranges the piston inside;
- and
- a holding spring that holds the piston pushing the movable contactor in the direction away from the fixed terminal,
- wherein the holding spring includes a holding portion having a hollow frustoconical shape, and
- the holding portion contacts with the piston.
A circuit interrupter, comprising:
- a fixed terminal including a fixed contact;
- a movable contactor that is provided below the fixed contact and includes a movable contact;
- a squib configured to generate gas by combustion;
- a piston that pushes the movable contactor in a direction away from the fixed terminal when the squib generates the gas;
- a sleeve that arranges the piston inside;
- and
- a holding spring that holds the piston pushing the movable contactor in the direction away from the fixed terminal,
- wherein the piston has a holding groove, and
- the holding spring contacts with the holding groove.
Dependencies are inferred from the claim text.