MAGNETIC SUBSTANCE HOLDING DEVICE USING PERMANENT MAGNET ENERGY CONTROL

• US 20140361860A1
• Filed: 12/30/2013
• Published: 12/11/2014
• Est. Priority Date: 06/07/2013
• Status: Active Grant

• Current Assignee: Taekwang Choi
• Original Assignee: Taekwang Choi
• Inventors: CHOI, TaeKwang
• Granted Patent: US 8,970,334 B2
• Time in Patent Office: Days
• US Class Current: 335/295
• CPC Class Codes: H01F 7/04 Means for releasing the attractive force

Abstract

There is provided a magnetic substance holding device that controls permanent magnet energy with which it is possible to obtain a strong holding force with a simple structure.

The magnetic substance holding device that controls permanent magnet energy of the present invention includes an N pole piece formed of a magnetic substance, wherein the N pole piece has a holding face to which a target formed of a magnetic substance is attached and a base attachment face at a side different from the holding face; an S pole piece formed of a magnetic substance, wherein the S pole piece has a holding face to which the target is attached and abase attachment face at a side different from the holding face; a permanent magnet that is disposed such that the N pole thereof comes in contact with the N pole piece and the S-pole thereof comes in contact with the S pole piece; a coil that is wound around at least one of the N pole piece and the S pole piece; abuse that is movable between a first position at which the base does not come in contact with both of the base attachment face of the N pole piece and the base attachment face of the S pole piece and a second position at which the base comes in contact with both of the base attachment face of the N pole piece and the base attachment face of the S pole piece; and a control device that controls a current applied to the coil., in which the target is held or released by applying a current to the coil through the control device such that at least one of the N pole piece and the S pole piece is magnetized.

Claims

1. A magnetic substance holding device that controls permanent magnet energy, the device comprising:

an N pole piece formed of a magnetic substance, wherein the N pole piece has a holding face to which a target formed of a magnetic substance is attached and a base attachment face at a side different from the holding face;

an S pole piece formed of a magnetic substance, wherein the S pole piece has a holding face to which the target is attached and a base attachment face at a side different from the holding face;

a permanent magnet that is disposed such that the N pole thereof comes in contact with the N pole piece and the S-pole thereof comes in contact with the S pole piece;

a coil that is wound around at least one of the N pole piece and the S pole piece;

a base that is movable between a first position at which the base does not come in contact with both of the base attachment face of the N pole piece and the base attachment face of the S pole piece and a second position at which the base comes in contact with both of the base attachment face of the N pole piece and the base attachment face of the S pole piece; and

a control device that controls a current applied to the coil,

wherein the target is held or released by applying a current to the coil through the control device such that at least one of the N pole piece and the S pole piece is magnetized,

when the base is disposed at the first position, the target is attached to the holding faces of the N pole piece and the S pole piece, and

the target is released from the holding faces of the N pole piece and the S pole piece by applying a current to the coil to generate a magnetic flow through the base attachment face of the N pole piece and the base attachment face of the S pole piece and by moving the base to the second position by a magnetic force.

2. The magnetic substance holding device that controls permanent magnet energy according to claim 1, further comprising:

an elastic member that provides an elastic force in a direction in which the base is away from the N pole piece and the S pole piece.

3. The magnetic substance holding device that controls permanent magnet energy according to claim 1, wherein the coil is wound around only the N pole piece and is positioned closer to the base than the permanent magnet.

4. The magnetic substance holding device that controls permanent magnet energy according to claim 1, wherein the coil is wound around only the N pole piece and is positioned further from the base than the permanent magnet, and

the sum of an area of the base attachment face of the N pole piece and an area of the base attachment face of the S pole piece is larger than that the sum of an area of the holding face of the N pole piece and an area of the holding face of the S pole piece.

5. The magnetic substance holding device that controls permanent magnet energy according to claim 1, further comprising:

a yoke that has an empty space therein and an opening,

wherein the base is disposed within the empty space and the holding faces of the N pole piece and the S pole piece are exposed to the outside through the opening, and

a first reinforced permanent magnet is disposed between the yoke and the N pole piece such that the N pole thereof comes in contact with the N pole piece and the S-pole thereof comes in contact with the yoke, or a second reinforced permanent magnet is disposed between the yoke and the S pole piece such that the S-pole thereof comes in contact with the S pole piece and the N pole thereof comes in contact with the yoke.

6. The magnetic substance holding device that controls permanent magnet energy according to claim 1, wherein the S pole piece is a first S pole piece and the permanent magnet is a first permanent magnet,

the device further includes:

a second S pole piece formed of a magnetic substance, wherein the second S pole piece has a holding face to which the target is attached and a base attachment face at a side different from the holding face; and

a second permanent magnet that is disposed such that the N pole thereof comes in contact with the N pole piece and the S-pole thereof comes in contact with the second S pole piece,

wherein the coil is wound around the N pole piece, and the base extends to face the base attachment face of the second S pole piece.

7. The magnetic substance holding device that controls permanent magnet energy according to claim 1, wherein the N pole piece is a first N pole piece and the permanent magnet is a first permanent magnet,

the device further includes:

a second N pole piece formed of a magnetic substance, wherein the second N pole piece has a holding face to which a target formed of a magnetic substance is attached and a base attachment face at a side different from the holding face; and

a second permanent magnet that is disposed such that the S-pole thereof comes in contact with the S pole piece and the N pole thereof comes in contact with the second N pole piece,

wherein the coil is wound around the S pole piece, and the base extends to face the base attachment face of the second N pole piece.

8. The magnetic substance holding device that controls permanent magnet energy according to claim 2,

wherein the N pole piece is a first N pole piece, the S pole piece is a first S pole piece, the permanent magnet is a first permanent magnet, the base is a first base, and the elastic member is a first elastic member,

the device further includes:

a second N pole piece formed of a magnetic substance, wherein the second N pole piece has a holding face to which a target formed of a magnetic substance is attached and a base attachment face at a side different from the holding face;

a second S pole piece formed of a magnetic substance, wherein the second S pole piece has a holding face to which a target formed of a magnetic substance is attached and a base attachment face at a side different from the holding face;

a second permanent magnet that is disposed such that the N pole thereof comes in contact with the second N pole piece and the S-pole thereof comes in contact with the second S pole piece;

a second base formed of a magnetic substance, wherein the second base is movable between a first position at which the second base does not come in contact with both of the base attachment face of the second N pole piece and the base attachment face of the second S pole piece and a second position at which the base comes in contact with both of the base attachment face of the second N pole piece and the second base attachment face of the second S pole piece; and

a second elastic member that provides an elastic force pushing the second base in a direction in which the second base is away from the second N pole piece and the second S pole piece, wherein the first N pole piece and the second N pole piece face each other but are spaced from each other, and the coil is disposed to surround both of the first N pole piece and the second N pole piece.

9. The magnetic substance holding device that controls permanent magnet energy according to claim 2,

wherein the N pole piece is a first N pole piece, the S pole piece is a first S pole piece, the permanent magnet is a first permanent magnet, the base is a first base, and the elastic member is a first elastic member,

the device further includes:

a second N pole piece formed of a magnetic substance, wherein the second N pole piece has a holding face to which a target formed of a magnetic substance is attached and a base attachment face at a side different from the holding face;

a second S pole piece formed of a magnetic substance, wherein the second S pole piece has a holding face to which the target formed of a magnetic substance is attached and a base attachment face at a side different from the holding face;

a second permanent magnet that is disposed such that the N pole thereof comes in contact with the second N pole piece and the S-pole thereof comes in contact with the second S pole piece;

a second base formed of a magnetic substance, wherein the second base is movable between a first position at which the second base does not come in contact with both of the base attachment face of the second N pole piece and the base attachment face of the second S pole piece and a second position at which the second base comes in contact with both of the base attachment face of the second IN pole piece and the base attachment face of the second S pole piece; and

a second elastic member that provides an elastic force in a direction in which the second base is away from the second N pole piece and the second S pole piece,

wherein the first S pole piece and the second S pole piece face each other but are spaced from each other, and the coil is disposed to surround both of the first S pole piece and the second S pole piece.

10. The magnetic substance holding device that controls permanent magnet energy according to claim 1, wherein the target and one or more of the holding face of the N pole piece and the holding face of the S pole piece are fitted to each other, and

the one or more of the holding face of the N pole piece and the holding face of the S pole piece is held at a predetermined position of the target when holding.