474results about "Contact vibration/shock damping" patented technology

An example of the present invention is a micromechanical device including, a substrate in which a signal line is provided, a micromachine which is mounted on the substrate, is formed of a conductive material into a beam-like shape, is elastically deformed by a function of an electric field in such a manner that the beam-like part moves closer to or apart from the signal line, and changes the electric characteristics concomitantly with the deformation, a deformation restraint section constituted of a material having a higher viscosity coefficient than the conductive material, provided on the opposite side of the micromachine to the signal line, for restraining deformation of the micromachine in a direction in which the micromachine is separated from the signal line, and a sealing body provided on the principal surface of the substrate, for covering the micromachine with a hollow section located therebetween.

In an electromagnet switch, a stationary iron core is composed mainly of a base part and a disk part. The base part is faced to a plunger and the disk part is forcedly inserted and fixed to a boss part formed in the base part. The disk part is composed of a metal plate of ferromagnetic substance (iron plate) and another substance plate (made of resin or rubber and the like, for example,) of a smaller spring constant or a larger damping coefficient than that of the metal plate. The metal plate and another substance plate are laminated. Another substance plate absorbs or reduces the impact force when the plunger is electromagnetically attracted toward and collides with the base part. The propagation of a large impact noise or crashing sound is thereby suppressed, and as a result the impact noise can be reduced.

This invention discloses a tapered damp oil buffer used in a vacuum breaker including an oil cylinder, an end cover, a sealed coil, a piston component and a spreader spring, in which, the piston component and the spreader spring are set in the oil cylinder including a working region and a guide hole filled with buffer oil and sealed with an end cover and a sealing loop characterizing that: the clearance between the piston and the oil cylinder working region is a variable value, and the clearance is large in the prophase of the movement of the piston and the clearance is small in the latter perion of the movement, and the distribution of the brake of the oil buffer is matched to the braking process of a switch device.

This electromagnetic switching device comprises an electromagnetic device 1 in which a movable core 15 comes into contact with or separates from a fixed core 14 in response to energization of an excitation coil 11 wound around a coil bobbin 10, a contact device 2 with a fixed contact 21 and a movable contact which comes into contact with or separates from the fixed contact in conjunction with a movement of the movable core 15 of the electromagnetic device, and a boxy case 3 configured to house the electromagnetic device and the contact device. The coil bobbin 10 has a flange 10a at its end in an axis direction of the coil bobbin, and the case 3 has, on its inner surface, a recess 31 into which a periphery of the flange 10a of the coil bobbin is fitted, and a cushioning member 32 for absorbing an impact which is transmitted from the electromagnetic device to the case is disposed in the recess, and the flange of the coil bobbin is supported by the recess through the cushioning member whereby the electromagnetic device is supported in the case.

An electromagnetic switch for use in actuating a starter for automotive vehicles is provided. The switch includes fixed contacts, a moving contact, and a plunger shaft. The moving contact is joined to a plunger shaft through an insulator. The plunger shaft is to be moved magnetically to bring the moving contact into abutment with the fixed contact to establish electric communication between the fixed contact. The switch also includes a rotation holder working to hold the moving contact and the insulator from rotating relative to each other. Use of the rotation holder results in a decrease in wear of the insulator. This eliminates the need for the insulator to have an additional thickness which would be worn down, thus permitting the insulator to be reduced in thickness to shorten the overall length of the switch.

A contact spring assembly is provided for an electrical switching apparatus including a movable contact assembly and a stationary contact assembly having stationary electrical contacts. The movable contact assembly includes a carrier assembly, and movable contact arms pivotably coupled to the carrier assembly and carrying movable electrical contacts. The contact spring assembly includes a first contact spring housing member, a second contact spring housing member coupled to and disposed opposite from the first contact spring housing member, a spring guide disposed between and coupled to at least one of the first and second contact spring housing members and including spring holes, springs received in the spring holes, and sliders coupled to the springs. The springs and sliders individually bias the movable contact arms and movable electrical contacts toward engagement with corresponding stationary electrical contacts. A movable contact assembly and an electrical switching apparatus are also disclosed.

Described herein is a knob including: a hub, which can be connected so that it is angularly fixed in a seat open at the front of an electrical household appliance, with a rotatable control pin of the household appliance designed to control, according to its own angular position, at least one function of the household appliance; a grip, which is carried so that it is angularly fixed but can slide axially, against the action of elastic means, on a first end of the hub opposite to a second end thereof for connection with said pin; and means for selective axial connection of the grip to the hub designed to block the grip in a first axial position, in which the grip projects in cantilever fashion from the first end of the hub and is set, in use, at least partially on the outside of said seat, and in a second axial position, in which the grip is fitted on said hub and is, in use, retracted within said seat; between the grip and the hub there being defined a closed chamber having a variable volume that is a function of the axial position of the grip on the hub and there being provided sliding seal means for sealing said air-tight chamber, and a calibrated restriction for connecting the inside of said chamber with the external environment in such a way as to bring about a negative pressure in said chamber as a result of the movement of the grip towards the first axial position.

The invention relates to an operating mechanism and a switching apparatus using the same. The operating mechanism comprises a power apparatus and a transmission mechanism, wherein the transmission mechanism comprises a connecting lever shaft connected with an output rotary shaft of the power apparatus and an insulating pull rod which is in transmission connection with the connecting lever shaft and used for driving a circuit breaker to switch on and switch off; the operating mechanism also comprises a spring apparatus which provides assisting force firstly and then provides buffer force in both of the switch on and switch off processes. According to the operating mechanism and the switching apparatus using the same, the spring apparatus supplies an assisting force effect to a moving contact of the circuit breaker in a front period of the switch on and switch off, so that short-time output power and transient torque output capability of the power apparatus can be reduced, and the power apparatus obtains the characteristics of low rotational inertia, small size and light weight; and meanwhile, the spring apparatus supplies a buffering effect to the moving contact of the circuit breaker in a later period of the switch on and switch off, so that the circuit breaker can be stopped in the switch on and switch off positions smoothly and stably so as to lower impact force.

The present invention is provided with a fixed contact; a movable contact which selectively contacts with or separates from the fixed contact; and a drive means which has at least an electromagnetic coil and drives the movable contact so that the movable contact comes into contact with the fixed contact. The drive means generates a first driving force for bringing the movable contact into contact with the fixed contact, and a second driving force larger than the first driving force for maintaining the contact state between the movable contact and the fixed contact.

A fuse element having a damping structure is disclosed. The fuse element includes a fuse body having two ends, a housing for encapsulating the fuse body and two extending anchor sections connected to the two ends. A meltable portion is coupled between the two ends and housed by the housing, so that the metable portion, when melted, will not contaminate the surrounding space. At least one of the anchor sections has at least one flexible conductive portion. If the fuse element is mounted in a circuit and subjected to shock and vibration, the flexible conductive portion will absorb the mechanical stresses placed on the terminals and the fuse body. As a result, the safety and reliability of the fuse element and the apparatus to which it is connected is significantly enhanced.

In an electromechanical relay the core of the relay coil and a corresponding zone of the armature are each provided with a pole face of zig-zag or stair-step configuration. A succession of corresponding edges of the core and armature pole faces concentrate the magnetic flux to increase the initial force on the armature and to limit the closing force as the armature reaches the closed position. The armature bearing is shaped to create a longitudinal wipe motion. The relay exhibits faster and quieter action with less bounce and reduced contact chatter.

A computer mouse includes a housing and a button assembly. The button assembly includes a button, a circuit board, a first conductive sheet, and a second conductive sheet. The button is exposed out of the housing. The circuit board is received in the housing, and includes a first contact and a second contact. The first conductive sheet has a first magnet fixed thereon, and is electrically connected to the first contact of the circuit board. The second conductive sheet is electrically connected to the second contact of the circuit board. The second conductive sheet is fixed to the button and contactable with the first conductive sheet when the button is pressed. The second magnet and the first magnet form a repulsive force therebetween.

The invention relates to a permanent magnet operating mechanism with an air opening damping device for high-voltage and low-voltage switches, belonging to the technical field of high-voltage and low-voltage electric appliances. The mechanism mainly comprises a permanent magnet mechanism body consisting of a power output shaft, an upper magnet yoke, an outer magnet yoke, a closing/opening coil, a movable iron core, an inner magnet yoke, a permanent magnet embedded between the inner magnet yoke and the outer magnet yoke, a lower magnet yoke, a guide shaft and an air chamber. In the technical scheme of the invention, the property and structure of an original permanent magnet mechanism are not changed; the movable iron core is used as a piston; and the section of an air escape channel can be controlled through calculating and designing the width of an eddy current prevention groove, a fit clearance and compressed air volume. During the closing operation of a breaker, the movable iron core rushes to the air chamber at a high speed, air pressure acts on the end surface of the movable iron core, and the breaker can obtain an ideal closing damping effect. An air damper and the permanent magnet operating mechanism are integrated into a whole, and therefore the structure of the breaker is simplified and the performance of the breaker is improved; and since an original closing oil damper and accessories are not used, cost is reduced, resources are saved and oil pollution is avoided.