Contact device

A contact device comprising:

• a sealed receptacle configured to house a fixed contact, and a movable contact;
• and
• a drive unit configured to move said movable contact between an on position where said movable contact is kept in contact with said fixed contact and an off position where said movable contact is kept away from said fixed contact,
• wherein said sealed receptacle includes:
• a case made of dielectric materials, said case being provided with an aperture in its first wall;
• and
• a closure plate secured in an airtight manner to a periphery of said aperture of said case,
• said fixed contact being fixed to a second wall of said case which is opposed to said first wall of said case,
• said movable contact being interposed between said fixed contact and said closure plate,
• said drive unit comprising a shaft, and an actuator including a fixed core penetrating through said closure plate, a movable core, and an electromagnet device,
• said shaft being disposed to penetrate through said movable contact, and said fixed core,
• said shaft being provided at its first end inside said sealed receptacle with a latch coming into contact with a fixed contact side surface of said movable contact,
• said shaft having its second end outside said sealed receptacle secured to said movable core,
• said electromagnet device being configured to generate a magnetic attraction between said fixed core and said movable core,
• said actuator being configured to control said electromagnet device to move said shaft along its axial direction between a position where said latch separates said movable contact from said fixed contact and a position where said latch allows said movable contact to come into contact with said fixed contact,
• said fixed core being provided with a flange configured to be hooked over a periphery of a through hole of said closure plate through which said fixed core penetrates,
• said contact device including a cap secured to said closure plate such that said flange of said fixed core is held between said cap and said closure plate,
• said contact device including a shock absorber,
• said shock absorber comprising:
• a first resilient portion interposed between said flange of said fixed core and said cap;
• a second resilient portion interposed between said flange of said fixed core and said closure plate;
• and
• a connection portion configured to integrally connect an outer edge of said first resilient portion to an outer edge of said second resilient portion.

A contact device comprising:

• a contacts mechanism unit including a sealed receptacle and a drive unit, said sealed receptacle configured to house a fixed contact and a movable contact, and said drive unit being configured to move said movable contact between an on position where said movable contact is kept in contact with said fixed contact and an off position where said movable contact is kept away from said fixed contact;
• an extinguishing unit including a pair of permanent magnets and a yoke configured to hold said pair of said permanent magnets, said permanent magnets in said pair being arranged on opposite sided of said sealed receptacle with respect to a direction crossing a direction along which said movable contact moves toward and away from said fixed contact;
• and,
• a housing including a base on which said contacts mechanism unit is mounted, and a cover configured to attached to said base such that said contacts mechanism unit and said extinguishing unit are housed between said base and said cover, and
• wherein any one of said yoke and said base is provided with an attachment protrusion with the other being provided with an attachment recess configured to receive said attachment protrusion.

A contact device comprising:

• a sealed unit including a fixed contact, a movable contact, and a sealed receptacle configured to house said fixed contact and said movable contact;
• and
• a drive unit configured to move said movable contact between an on position where said movable contact is kept in contact with said fixed contact and an off position where said movable contact is kept away from said fixed contact,
• wherein said sealed unit includes a fixed terminal penetrating through a wall of said sealed receptacle, and an external connection terminal adapted to be connected to an external circuit,
• said fixed terminal being provided with said fixed contact at its first end inside said sealed receptacle,
• said fixed terminal being provided with a deformation portion at its second end outside said sealed receptacle, and said deformation portion being adapted to be plastically deformed to connect said fixed terminal to said external connection terminal.