DOORBELL DEVICE AND METHOD FOR SUPPLYING POWER THERETO

    公开(公告)号:EP3404650A1

    公开(公告)日:2018-11-21

    申请号:EP17738589.5

    申请日:2017-01-03

    发明人: JEON, Ki Kyung

    摘要: A doorbell device according to an embodiment of the present invention comprises: a power input unit; an interface unit; a battery unit for supplying power to the interface unit; a switching circuit which is connected to a doorbell switch so as to change the path of a current supplied from the power input unit according to the on/off state of the switch; a control unit for charging the battery unit by using a current output from the switching circuit; and a current detection unit which is connected between the switching circuit and the control unit so as to detect the current output from the switching circuit, wherein the control unit limits the current output from the switching circuit when the current detected by the current detection unit has a value equal to or greater than a predetermined value.

    ELECTOMECHANICAL RELAY AND METHOD OF MAKING SAME
    6.
    发明公开
    ELECTOMECHANICAL RELAY AND METHOD OF MAKING SAME 审中-公开
    机电式继电器及其制造方法

    公开(公告)号:EP2415061A1

    公开(公告)日:2012-02-08

    申请号:EP10762200.3

    申请日:2010-03-31

    申请人: Shen, Jun

    发明人: Shen, Jun

    IPC分类号: H01H51/34

    摘要: A relay comprises a movable body placed in a cavity which is formed on a substrate and surrounded by a spacer layer and sealed by a cover layer. The movable body comprises a first magnet which is permanently magnetized and has at least a first end. A nearby switching electromagnet, when energized, produces a switching magnetic field which is primarily perpendicular to the magnetization direction of the first magnet and exerts a magnetic torque on the first magnet to force the first magnet and said movable body to rotate and close an electrical conduction path at the first end. Changing the direction of the electrical current in the switching electromagnet changes the direction of the switching magnetic field and thus the direction of the magnetic torque on the first magnet, and causes the first magnet and said movable body to rotate in an opposite direction and opens the electrical conduction path at the first end. The first magnet can comprise multiple magnetic layers to form relatively closed magnetic circuits with other magnetic components. Latching and non-latching types of relays can be formed by appropriately using soft and permanent magnets as various components.