75 results about "Plastic magnet" patented technology

An endoscopic coupler by which the rotary and / or linear motion of an external ring is transferred via magnetic interaction of specially configured continuous plastic magnets to a lens resident in a hermetically sealed housing to effect focusing and / or zooming action of the lens without mechanically breaching the integrity of the hermetic seal thereby making the coupler particularly suitable for withstanding the rigors of autoclaving.

A magnetic tile construction set is disclosed that may be used to construct extended 3-dimensional structures. In one embodiment, plastic magnets are attached to multiple edges of a lightweight core. The magnets have a width and length comparable to the thickness of the core and a length that is an order of magnitude longer than the thickness of the core. Tiles may be attached to one another at the tile edges through magnetic forces that do not vary by more than a factor of two over the range of angles from 45 degrees to 180 degrees.

A rotor for a motor includes a shaft having an outer periphery with an engaging portion. At least one coupling member includes an engaging hole. The shaft extends through the engaging hole of the at least one coupling member. The at least one coupling member is engaged with the engaging portion of the shaft by tight coupling. A plastic magnet envelops the shaft and the at least one coupling member by injection molding. The at least one coupling member prevents the plastic magnet from disengaging from the shaft, providing enhanced engaging effect while reducing structural complexity and enhancing assembling convenience.

A tone wheel constituting a rotation detection magnetic encoder in combination with a magnetic sensor fixed onto a stationary side member, the tone wheel comprising a metal reinforcing ring fitted in a rotary side member and a circular multipolar magnet fixed to the metal reinforcing ring. the circular multipolar magnet is made of a plastic magnet of a circular resin molded product which contains a magnetic powder therein and is magnetized with a number of S and N poles alternatively along its circumference; the circular multipolar magnet is fixed to a surface of the metal reinforcing ring opposed to the magnetic sensor with an adhesive; and a restraint portion is provided at a part of the portion wherein the circular multipolar magnet is fixed to the metal reinforcing ring, thereby fixation of the circular multipolar magnet to the metal reinforcing ring is reinforced and depart of the circular multipolar magnet from the metal reinforcing ring is prevented.

An endoscopic coupler by which the rotary and / or linear motion of an external ring is transferred via magnetic interaction of specially configured continuous plastic magnets to a lens resident in a hermetically sealed housing to effect focusing and / or zooming action of the lens without mechanically breaching the integrity of the hermetic seal thereby making the coupler particularly suitable for withstanding the rigors of autoclaving.

A wheel support bearing assembly for supporting a wheel, which assembly includes an outer member having rolling surfaces and serving as a stationary member; an inner member having rolling surfaces; a plurality of rows of rolling elements interposed between the respective rolling surfaces; a magnetic encoder fitted to the outer peripheral surface of the inner member at a location adjacent one end thereof; an annular sensor holder made of resin and fitted to the outer member through a core metal, the annular sensor holder having a built-in magnetic sensor with an axial gap intervening between it and the magnetic encoder; and a sealing unit arranged on an outer side axially outwardly of the encoder and the sensor for sealing a space between the sensor holder and the inner member. The magnetic encoder includes a plastic magnetic encoder having a plastic magnet defining a to-be-detected portion.

A magnetized pulsar ring of the invention is a pulsar ring fixed to an outer peripheral surface of a supporting member and including a ring body in which a number of magnetic poles are at predetermined intervals in a peripheral direction. The ring body 11a is formed of a plastic magnet, and has a cushion member made of an elastic body that is interposed between the ring body and the outer peripheral surface.

A composition for synthetic resin magnets (such as magnet rollers for electrophotography process) which is composed of a resin binder and a magnetic powder mixed and dispersed therein. The resin compound has improved melt flow rate because the binder contains a thermoplastic and an aliphatic polyamide. Owing to its improved melt flow rate, the resin compound can be incorporated with a large amount of magnetic powder without deterioration in moldability. Thus the resulting plastic magnet has a strong magnetic force. In addition, the composition for synthetic resin magnets may be incorporated with a hindered phenol antioxidant, so that it is molded at a higher temperature (120-180 DEG C.) than usual to achieve the same object as mentioned above.

A magnetic recording apparatus comprises a magnetic disk; a magnetic head, including a magnetoresistive device, for reading information from the magnetic disk; an arm attached to the magnetic head and swings so as to load and unload the magnetic head to or from the magnetic disk; a magnetic field applying part disposed close to the magnetic disk, made of a magnetic material, and formed with a groove for surrounding the magnetic head; and a holding part for holding the arm such that the unloaded magnetic head stays at a position surrounded by the groove; whereas the magnetic material contains a plastic magnet.

The invention relates to the field of buzzer automation, in particular to a buzzer automatic assembling machine. The buzzer automatic assembling machine comprises a workbench, and the workbench is provided with a part feeding module, an assembling module and a material receiving module. The buzzer automatic assembling machine is specially used for assembling novel buzzers, magnetic rings are placed and stored in a material bin mode during feeding, the storage quantity is large, during use, a stop block air cylinder drives a stop block to achieve automatic material falling and feeding, the operation is simple, convenient and time-saving, frequent material changing is not needed, synchronous belt material conveying and feeding are achieved, the automation degree is greatly improved, inner supporting type clamping jaws are adopted for taking materials, separation of plastic magnets is achieved through cooperation with magnetic rings with steps, through combining of a plate placing mechanism, a plate conveying mechanism and a plate taking mechanism, the material receiving module achieves automatic material receiving, coils, cover plates and connector lug assembling parts only need to be additionally arranged on the upper portions of buzzer semi-finished products and then pressed so that assembling of the whole buzzers can be achieved, the structure is simple, pure machining can be achieved, existing manual dispensing assembling is replaced, time and labor are saved, and the quality of produced products is higher.

A plastic magnet precursor which can be supplied in molding a plastic magnet with a constant composition without requiring kneading in which a resin is melted and sheared. Through injection molding using the precursor, a plastic magnet having little deterioration of magnetic properties and a small variation in quality is obtained. The plastic magnet precursor according to the present invention includes an Nd—Fe—B isotropic magnet powder and a ferrite anisotropic magnet powder subjected to coating with a titanate coupling agent, and a thermoplastic resin powder adhered around the magnet powder.

In a rotary flow-path exchanging valve, the magnetic force generated in a pair of main magnetic pole pieces (66) by energization of an electromagnetic solenoid is acted on a multi-pole magnet (71) of a main valve element accommodated within a valve housing (1) so that the main valve element (3) is rotated to exchange a flow-path. The multi-pole magnet (71) is made of a plastic magnet of plastic material mixed with magnetic powder. The main valve element (3) and multi-pole magnet (71) are integrally formed by multiple molding. A pair of main magnetic pole pieces (66) magnetically connected to one polarity of the electromagnetic solenoid (11) are arranged. A pair of auxiliary magnetic pole pieces (70) connected to the other polarity of the electromagnetic solenoid (11) are arranged at positions out of phase from the magnetic pole pieces by 90 DEG . The pair of auxiliary magnetic poles (70) are opposed to portions of the multi-pole magnet (71) having a reverse polarity to that of portions of the multi-pole magnet (71) opposite to the main magnetic poles (66).

An electric motor includes a magnet rotor which is placed with an air gap interposed between it and a stator and has a magnetic pole portion formed from a plastic magnet which swells by hydrogen bonds, an inverter circuit, a DC-voltage conversion portion, a driving logic control portion, a supply current value control portion, a current value designation portion, a reference current value designation portion, and a correlation designation portion, wherein the correlation designation portion determines an average current value by changing the average current value linearly or non-linearly with respect to a reference current value, and the magnetic pole portion absorbs moisture to swell, thereby making the air gap smaller, at higher humidity than a reference humidity.