Magnet type medical instrument and electromagnet and coil used in it
AssigneePulse Medical Co., Ltd.
InventorKyoichi Nakagawa
Life of this patent
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Abstract
The purpose of the present invention is to propose a magnet type medical instrument which can prevent the magnetic flux density from reducing remarkably even at a point distant from a magnetic pole of a core and realize a satisfactory pain-killing effect in a human body even at a point distant from the magnetic pole. The electromagnet for the magnet type medical instrument comprises a first core 1 with first inner space and a first coil 3 which is wound round the first core 1 and which can generate a first magnetic field by applying an alternating current, a commutated current or a pulsating current to the first coil 3.
Claims11
An electromagnet for a magnetic medical instrument comprising a cylindrical first core with a first inner space and a first coil wound around said first core, said electromagnet adapted to generate a first magnetic field by applying an alternating current, a commutated current, or a pulsating current to said first coil,
- a second coil, wound around a second core in said first inner space to form a second inner space, adapted to generate a second magnetic field by applying said alternating current or said pulsating current to said second coil, said first coil and said second coil wound in a same direction so that a polarity of said first magnetic field coincides with that of said second magnetic field, and a number of turns of at least one of said first coil and said second coil is regulated so that a phase of said first magnetic field coincides with that of said second magnetic field.
A magnetic medical instrument comprising a transformer having a primary winding adapted to receive a primary voltage from a source of alternating current, and a secondary winding adjacent said primary winding adapted to convert said primary voltage into an output voltage;
- a pair of electromagnets which generates a magnetic field by application of said output voltage to said electromagnets whereby pain in at least a portion of a human body between said electromagnets is ameliorated;
- a pair of supporting elements for said electromagnets, a fixing bed for moving said electromagnets toward and away from each other, whereby said electromagnets move close to and away from said human body;
- and
- a pair of sliding terminals, attached to said supporting elements, which slide axially in contact with said secondary winding, thereby regulating a number of active turns of said secondary winding based on a distance between said pair of electromagnets and said human body, whereby said output voltage applied to said electromagnets is varied.
A magnetic medical instrument comprising a transformer having a primary winding adapted to receive a primary voltage from a source of alternating current, and a secondary winding adjacent said primary winding adapted to convert said primary voltage into an output voltage;
- a pair of electromagnets which generate a magnetic field by application of said output voltage to said electromagnets whereby pain in at least a portion of a human body between said electromagnets is ameliorated;
- a pair of distance sensors, attached to said pair of electromagnets, applying infrared rays against said human body and detecting a distance between said pair of electromagnets and said human body by receiving said infrared rays reflected from said human body,
- a pair of supporting elements for said electromagnets, a fixing bed for moving said pair of supporting elements close to or apart from each other;
- a pair of sliding terminals, attached to said pair of supporting elements, which slide axially in contact with said secondary winding, thereby regulating a number of active turns of said secondary winding, whereby said output voltage applied to said electromagnets is varied;
- a control device including a driving mechanism for changing a distance between said supporting elements, which also changes a distance between said sliding terminals based on an input signal from said pair of distance sensors corresponding to a distance between said pair of electromagnets and said human body.
Dependencies are inferred from the claim text.