An electromagnetic actuator having a permanent magnet coupled to an armature of the electromagnetic actuator is provided. The electromagnetic actuator includes a housing, and an armature assembly arranged within the housing. The armature assembly includes an armature and a permanent magnet coupled to the armature. The armature is movable between a first position and a second position, and the permanent magnet defines an axial magnet thickness and the armature defines an axial armature thickness. A ratio of the axial armature thickness to the axial magnet thickness is greater than approximately three.

A solenoid valve for controlling a fluid flow. The solenoid valve comprises an actuating member (101) moveable between a first position and a second position. Movement of the actuating member (101) in one direction effects opening of the valve and movement of the actuating member (101) in an opposite direction effects closing of the valve. The solenoid valve further comprises a biasing means (102) for biasing the actuating member (101) towards the first position; and an armature (103) moveable in response to energising/de-energising of the solenoid valve. Energising the solenoid valve is operable to move the armature (103) to engage the actuating member (101) and cause movement of the actuating member (101) to the second position against action of the biasing means (102). De-energising the solenoid valve allows the biasing means (102) to effect movement of the armature and of the actuating member (101) towards the first position, initially causing disengagement of the armature from the actuating member, and, subsequently causing

[Object] To provide a coil device, which is small and can be easily attached to various apparatus without providing a lead wire and can be easily and inexpensively manufactured, and a method for manufacturing the coil device, and a bobbin for coil which is used in the coil device and the method.

[Solution] The bobbin for coil 1 according to the present invention is for winding a conductor wire configuring an electromagnetic coil, and contains a first bobbin body 2, a second bobbin body 3 disposed in series to the first bobbin body 2, and a connecting part 4 coupling the first bobbin body 2 and the second bobbin body 3 in series. A connector part 5 incorporating a prescribed number of terminal metal fittings 6 is provided on one axial end portion of the bobbin for coil 1.

Thus, since a relatively large space is not required for disposing lead wire(s) as in the prior art, the bobbin for coil is small, so that it can be inexpensively produced.

A bi-stable solenoid includes a housing, a wire coil, a permanent magnet, an armature, a pin, and a spring. The wire coil is arranged within the housing. The armature is slidably arranged within the housing and is moveable between a first armature position and a second armature position. The pin at least partially extends out of the housing and is slidably engaged by the armature. The spring is biased between the armature and the pin. When the pin encounters an intermediate position between a retracted position and an extended position due to the pin engaging an obstruction, the spring is configured to maintain a biasing force on the pin until the obstruction is removed.

A bistable solenoid valve for a hydraulic brake system has a guide sleeve in which an upper immovable pole core is fixedly arranged and a closing element is displaceably arranged. The closing element is forced into a valve seat during a closing movement and lifts off from the valve seat during an opening movement, and is fixedly connected to a magnet assembly. An actuation of the movement of the closing element is performed by the magnet assembly via a coil positioned around and substantially surrounding the guide sleeve. A lower immovable pole core is fixedly arranged in the guide sleeve and the magnet assembly is positioned between the lower and the upper pole core.

Embodiments of the present disclosure include a method and apparatus. An exemplary apparatus includes a solenoid assembly that includes a ferromagnetic core tube having a first channel and a second channel disposed on the radial exterior surface of the ferromagnetic core tube. The first channel and the second channel circumscribe the ferromagnetic core tube along a given portion of the longitudinal axis. The first channel and the second channel are spaced from one another along the longitudinal axis. The first channel has a first magnetic ring radially spaced apart from a first thin wall. The second channel has a second magnetic ring radially spaced part from a second thin wall. The solenoid assembly also includes a coil located radially outward of the ferromagnetic core tube.

An actuator is proposed. A housing and a housing cap may constitute the exterior of the actuator, and a driving pin may be installed in an inner space of the housing such that the driving pin is moved by being guided by a guide. A cylindrical bobbin having one open end portion may be installed at the driving pin to be moved integrally therewith, and a coil may be installed at the bobbin. A permanent magnet and an iron core may be stacked in the inner space by the guide. A pin iron core may be provided at the driving pin, and a pin coil may be installed in a groove of the pin iron core.

A vapor delivery needle is provided that may include any of a number of features. One feature of the energy delivery probe is that it can apply condensable vapor energy to tissue, such as a prostrate, to shrink, damage, denaturate the prostate. In some embodiments, the vapor delivery needle can be advanced a predetermined distance into the prostate with a solenoid actuation mechanism. Methods associated with use of the energy delivery probe are also covered.

A system may include an armature configured to move between a first position that electrically couples the armature to a first contact and a second position that electrically couples the armature to a second contact. The system may also include a coil configured receive a current, such that the current conducting in the coil is configured to magnetize a core. The magnetized core may cause the armature to move from the first position to the second position. The system may also include a control system configured to detect a position of the armature based on an inductance of the coil.

A linear movement bistable electromagnetic switch, comprising a coil (1), a magnetic rotor (2) movably disposed in an inner hole of the coil (1), a shell (3) which wraps an outer side surface of the coil (1), and an insulating layer (4) disposed between the coil (1) and the shell (3). The magnetic rotor (2) is able to move under the effect of a magnetic field generated after the coil is energized; one end of the magnetic rotor (2) extends out of the coil (1) and is connected to a blocking piece (211) for opening/closing a loudspeaker leakage hole. The magnetic rotor is able to be extended or retracted by changing the direction of current in the coil so as to drive the blocking piece to block or open the leakage hole, such that the call distortion condition can be improved and the high-frequency sound effect will not be reduced.