Patent application number | Description | Published |
20090315653 | Electromagnet device and electromagnetic contactor - A core for an electromagnetic device includes a yoke and at least two legs extending from the yoke. The yoke and at least two legs are formed of steel plates laminated together. Each of the legs has a free end face forming a magnetic pole face, a first groove extending from the magnetic pole face and a second magnetic groove on a side face thereof. Also, the core includes a shading coil having a metal ring shape, and including a first linear section and a second linear section extending in parallel with each other. A part of the first linear section is accommodated in the first groove, and a part of the second linear section is accommodated in the second groove and locked therein. A bottom face of the second groove forms an angle with respect to a bottom face of the first groove. | 12-24-2009 |
20120133461 | RIVERSIBLE ELECTROMAGNETIC CONTACTOR - An electromagnetic contactor ( | 05-31-2012 |
20120138759 | RAIL ATTACHMENT STRUCTURE OF ELECTRIC DEVICE - First fitting portions ( | 06-07-2012 |
20120139672 | ELECTROMAGNETIC CONTACT DEVICE - An extinction cover ( | 06-07-2012 |
20120280771 | REVERSIBLE ELECTROMAGNETIC CONTACTOR - A reversible unit ( | 11-08-2012 |
20120326815 | ELECTROMAGNETIC SWITCH - An electromagnetic switch has a contact device having a pair of fixed contacts fixed thereof and maintaining a predetermined interval inside an arc-extinguishing chamber receptacle, and a movable contact disposed to be connectable with the pair of fixed contacts; and an electromagnetic device driving the movable contact. The electromagnetic device has a cylindrical exciting coil, a fixed core passing through center of the exciting coil, a magnetic yoke covering an outer side of the exciting coil, and a movable core facing the fixed core and the magnetic yoke, and armature surfaces of the fixed core and the magnetic yoke are formed on a side of the contact device than the exciting coil. | 12-27-2012 |
20130002381 | REVERSIBLE ELECTROMAGNETIC CONTACTOR - A reversible unit ( | 01-03-2013 |
20130063232 | CONTACT DEVICE AND ELECTROMAGNETIC SWITCH USING CONTACT DEVICE - The present invention provides a contact device capable of narrowing a gap between a fixed contactor and a movable contactor and reducing the number of parts and the production costs, and an electromagnetic switch that uses the contact device. The contact device has a pair of columnar fixed contactors ( | 03-14-2013 |
20130076463 | ELECTROMAGNETIC CONTACTOR AND ASSEMBLY METHOD FOR THE SAME - There is provided a drive lever incorrect assembly detection portion ( | 03-28-2013 |
20130113580 | CONTACT MECHANISM AND ELECTROMAGNETIC CONTACTOR USING SAME - The present invention provides a contact mechanism that is capable of, without enlarging the entire configuration thereof, preventing the generation of an electromagnetic repulsion that opens a movable contact upon application of a current, and also provides an electromagnetic contactor that uses this contact mechanism. A contact mechanism (CM) has a fixed contact ( | 05-09-2013 |
20130115829 | CONTACT MECHANISM, AND ELECTROMAGNETIC CONTACTOR USING THE CONTACT MECHANISM - A contact mechanism includes a fixed contact and a movable contact adapted to be inserted in a conducting path. The fixed contact includes a pair of flat plate conductive bodies disposed and fixed to maintain a predetermined interval. The movable contact includes a flat plate conductive body disposed to face the pair of flat plate conductive bodies of the fixed contact and capable of contacting with and separating from the pair of flat plate conductive bodies. Current paths wherein each of the current paths has a current flowing in a same direction are formed at least two side portions of the flat plate conductive bodies of the fixed contact and movable contact mutually facing each other in a width direction. | 05-09-2013 |
20130257567 | ELECTROMAGNETIC CONTACTOR - An electromagnetic contactor has a contact device having a pair of fixed contacts and a movable contact; and an electromagnet unit including an exciting coil driving a movable plunger connected through a connecting shaft. The contact device is configured such that L-shaped portions have a contact portion formed in the pair of fixed contacts fixed maintaining a predetermined interval, and two ends of the movable contact are disposed to be capable of contacting to and separating from the contact portions of the L-shaped portion on a side opposite to that of the electromagnet unit. The electromagnet unit includes a magnetic yoke enclosing a plunger drive portion, a movable plunger having a leading end protruding through an aperture formed in the magnetic yoke and urged by a return spring, and a ring-form permanent magnet magnetized in a movable direction of the movable plunger and fixed to enclose a peripheral flange portion. | 10-03-2013 |
20130301181 | ELECTROMAGNETIC CONTACTOR - An electromagnetic contactor has a pair of fixed contacts disposed and fixed maintaining a predetermined interval; a movable contact disposed to be capable of contacting to and separating from the pair of fixed contacts; an electromagnet unit to drive the movable contact; and a drive circuit driving the electromagnet unit. The electromagnet unit includes at least a movable plunger urged by a return spring, a coil to move the movable plunger, and a ring-form permanent magnet magnetized in a moving direction of the movable plunger. The drive circuit includes a power source to supply power to the coil; a pulse drive circuit to output and supply to the coil an engage pulse causing the movable plunger to perform an attracting operation and a hold pulse maintaining the attracting operation when the movable plunger is subject to the attracting operation, and a flywheel circuit having a semiconductor switching element. | 11-14-2013 |
20130328647 | ELECTROMAGNETIC CONTACTOR - An electromagnetic contactor has a pair of fixed contacts; a movable contact disposed to be capable of contacting with and separating from the pair of fixed contacts; and an electromagnetic unit driving the movable contact. The electromagnetic unit has a magnetic yoke having an open upper part; an upper magnetic yoke cross-linked in the open upper part of the magnetic yoke; a spool having a central opening in which an exciting coil is wound around the spool; a movable plunger movably disposed in the central opening of the spool in an axial direction and having a tip end protruding, the movable plunger urged by a return spring; and an auxiliary yoke forming a magnetic path between the movable plunger and the U-shaped magnetic yoke when the movable plunger is in an open position. The movable plunger is coupled to the movable contact through a coupling shaft. | 12-12-2013 |
20140013583 | METHOD FOR ASSEMBLING ARC-EXTINGUISHING CHAMBER OF ELECTROMAGNETIC CONTACTOR - A method for assembling an arc-extinguishing chamber of an electromagnetic contactor includes a step of fixing a pair of fixed contacts each including a support conductor and a C-shaped part, to a bottom plate part of the arc-extinguishing chamber having a tub-shape with one end being open, the C-shaped part defining inside of the arc-extinguishing chamber; a step of installing an insulation cover covering a part other than a contact point part of each C-shaped part of the pair of fixed contacts; and a step of disposing a movable contact to be capable of contacting to and separating from the contact point parts of the fixed contacts. | 01-16-2014 |
20140014622 | ELECTROMAGNETIC CONTACTOR - An electromagnetic contactor includes a contact device having a contact housing case formed from an insulating material and housing a pair of fixed contacts and a movable contact disposed to be capable of contacting to and separating from the pair of fixed contacts. On an inner peripheral surface of the contact housing case along the movable contact, arc extinguishing permanent magnets magnetized so that magnetic pole faces facing each other have same polarity are disposed to be near the movable contact. | 01-16-2014 |
20140062625 | ELECTROMAGNETIC CONTACTOR - An electromagnetic contactor has a pair of fixed contacts disposed maintaining a predetermined interval and a movable contact disposed to be capable of connecting to and separating from the pair of fixed contacts; and an electromagnet unit that drives the movable contact. The electromagnet unit includes a magnetic yoke enclosing a plunger drive portion; a movable plunger in which a leading end is protruding through an aperture formed in the magnetic yoke, and urged by a return spring; and an annular permanent magnet enclosing a peripheral flange portion formed on a protruding end side of the movable plunger, and magnetized in a moving direction of the movable plunger. | 03-06-2014 |
20140062627 | ELECTROMAGNETIC CONTACTOR - An electromagnetic contactor has a contact device including a pair of fixed contacts disposed maintaining a predetermined distance and a movable contact disposed to be capable of contacting to and separating from the pair of fixed contacts. The pair of fixed contacts each includes a support conductor portion supported by an upper plate of a contact housing case, and a contact conductor portion connected to an end portion of the support conductor portion. The contact conductor portion includes a contact plate portion formed with a contact portion, and a connecting plate portion formed on an outer end portion of the contact plate portion and extending to the upper plate side. The movable contact is mounted onto a connecting shaft connected to a drive portion through a contact spring on an end portion on the upper plate side, and disposed to face the contact portion of the pair of fixed contacts. | 03-06-2014 |
20140176268 | ELECTROMAGNETIC SWITCH - An electromagnetic switch has a contact device having a pair of fixed contacts fixed inside an arc extinguishing chamber housing and a movable contact disposed to contact with and separate from the fixed contacts; and an electromagnetic device having a movable plunger moving between an opened position wherein the movable contact separates from the fixed contacts and a closed position wherein the movable contact contacts with the fixed contacts and pressed down. The arc extinguishing chamber housing is provided with permanent magnets to extinguish an arc generated at an opening time when the movable contact separates from the fixed contacts from a state in the closed position wherein the movable contact is contacting with the fixed contacts. In a state wherein the movable plunger is in the opened position, a magnetic circuit is formed starting from the permanent magnets and returning to the permanent magnets through the movable plunger. | 06-26-2014 |
20140266522 | CONTACT MECHANISM AND ELECTROMAGNETIC CONTACTOR USING SAME - A contact mechanism is capable of, without enlarging the entire configuration thereof, preventing the generation of an electromagnetic repulsion that opens a movable contact upon application of a current, and also provides an electromagnetic contactor that uses this contact mechanism. A contact mechanism has a fixed contact and a movable contact that are inserted in a current-carrying path. In the contact mechanism, the fixed contact or the movable contact is formed into an L-shape or a U-shape so as to generate a Lorentz force that acts against an electromagnetic repulsion in an opening direction, which is generated between the fixed contact and the movable contact upon application of a current. | 09-18-2014 |
20140360985 | SWITCH - A switch includes a pair of fixed contacts disposed at a predetermined distance from each other; a movable contact arranged to be capable of contacting with and separating from the pair of fixed contacts; and an arc extinguishing container internally mounted with the pair of fixed contacts and the movable contact. The arc extinguishing container includes a resin container having a terminal retention plate portion adhesively bonded a pair of external connection terminals, and a side plate portion extending downward from an outer circumferential portion of the terminal retention plate portion, and formed with an open face, and a metal bucket-shaped body internally mounted with the movable contact and the pair of fixed contacts inserted into the side plate portion of the resin container. The are extinguishing container is formed by bonding the resin container and the metal bucket-shaped body to each other by an adhesive agent. | 12-11-2014 |
20150022293 | ELECTROMAGNETIC CONTACTOR - The electromagnetic contactor includes a contact device having a pair of fixed contacts disposed to maintain a predetermined distance and a movable contact disposed so as to be attachable to and detachable from the pair of fixed contacts; an electromagnet unit having a movable plunger that moves the movable contact of the contact device; a hermetic chamber enclosing the pair of fixed contacts, the movable contact, and the movable plunger; an external receptacle that covers the hermetic chamber and electromagnet unit; and a sound insulating resin layer injected and hardened between the hermetic chamber and external receptacle. The electromagnetic contactor reduces the height of a contact device, and thus reduces a size of the electromagnetic contactor, while suppressing electromagnetic repulsion force generated between a movable contact and fixed contacts. | 01-22-2015 |
20150022295 | ELECTROMAGNETIC CONTACTOR - The electromagnetic contactor includes a contact mechanism including a pair of fixed contacts disposed to maintain a predetermined interval and a movable contact disposed so as to connect to and separate from the pair of fixed contacts, and an electromagnet unit that drives the movable contact. The electromagnet unit includes a magnetic yoke enclosing a plunger drive portion, a movable plunger, a leading end thereof protruding through an aperture formed in the magnetic yoke and a peripheral flange portion being formed on a protruding end side, movement regulating portions that regulate movement of the peripheral flange portion of the movable plunger in an engaged position and released position of the contact mechanism, and a contact noise suppression member that suppresses contact noise when the peripheral flange portion of the movable plunger contacts the movement regulating portions. | 01-22-2015 |
20150022296 | SWITCH - A switch has a pair of fixed contacts installed in an arc extinguishing container and disposed to maintain a predetermined space therebetween, and a movable contact disposed so as to come into and out of contact with the pair of fixed contacts. The arc extinguishing container includes an open-topped tub-shaped metal body, an insulating holding member which holds the pair of fixed contacts, disposed on an inner side of the tub-shaped metal body, opposite to the movable contact, and an open-bottomed tub-shaped resin cover which covers the pair of fixed contacts and the movable contact from an open edge face side of the tub-shaped metal body. A periphery of an open edge of the resin cover is sealed to a bottom surface of the tub-shaped metal body with an adhesive agent. | 01-22-2015 |