JP5505211B2 - Polarized electromagnet and electromagnetic contactor - Google Patents

Description

  The present invention relates to a polarized electromagnet including a permanent magnet and an electromagnetic coil, and an electromagnetic contactor including the polarized electromagnet.

As a polarized electromagnet incorporated in an electromagnetic contactor, for example, one disclosed in Patent Document 1 is known. As shown in FIG. 11, the polarized electromagnet includes a cylindrical electromagnetic coil 1, a pair of fixed iron core portions 2, a permanent magnet 3, a pair of magnetic pole plates 4, and a movable iron core portion 5.
The fixed iron core portion 2 has one end plate portion 2a close to one end of the electromagnetic coil 1 and the other end plate portion 2b spaced apart and opposed to the other end of the electromagnetic coil 1, and the one and other end plate portions 2a. , 2b is a substantially U-shaped member disposed so that the side plate portion 2c extending between the outer peripheral portions of the electromagnetic coil 1 is close to the side plate portion 2c. The permanent magnet 3 is disposed outside the side plate portion 2 c of the fixed iron core portion 2. The magnetic pole plate 4 is a substantially L-shaped member in which the side plate portion 4 a is disposed outside the permanent magnet 3, and the end plate portion 4 b is separated from and opposed to one end plate portion 2 a of the fixed iron core portion 2. The movable iron core 5 is fixed to one end of the iron core 5a inserted through the electromagnetic coil 1 and one end of the iron core 5a, and is positioned between one end plate 2a of the fixed iron core 2 and the side plate 4b of the magnetic pole plate 4. A first arm 5b that is fixed to the other end of the iron core rod 5a, and a second arm 5c that is positioned between the other end of the electromagnetic coil 1 and the other end plate 2b of the fixed iron core portion 2. The movable iron core 5 is urged to the right in FIG. 6 by a return spring (not shown).

Here, the 2nd arm 5c of the movable iron core part 5 mentioned above is a flat plate member extended in the direction orthogonal to the axis line of the iron core stick | rod 5a, and the other flat shape of the fixed iron core part 2 is this 2nd arm 5c. The end plate portions 2b face each other in parallel. Thereby, the 2nd arm 5c and the other end plate part 2b are facing in parallel, orthogonal to the movable direction (direction shown by the arrow of FIG. 6) of the movable iron core part 5. FIG.
When the electromagnetic coil 1 is in a non-excited state, the magnetic flux of the permanent magnet 3 is changed to the magnetic pole plate 4, the first arm 5b of the movable iron core 5, the iron core 5a, one end plate 2a of the fixed iron core 2, and the side plate. By circulating in the forward path of the part 2c and the permanent magnet 3, the attractive force between the end plate part 4b of the magnetic pole plate 4 and the first arm 5b of the movable iron core part 5 becomes strong, and the first arm of the movable iron core part 5 5b is attracted to the end plate portion 4b of the magnetic pole plate 4 by the return force of the return spring and the attractive force of the permanent magnet 3, and the released state is maintained.

  Further, when the electromagnetic coil 1 is in an excited state, the magnetic flux of the electromagnetic coil 1 is changed so that the side plate portion 2c of the fixed iron core portion 2, the other end plate portion 2b, the second arm 5c of the movable iron core portion 5, the iron core rod 5a, and the fixed iron core. By circulating in the forward path of one end plate part 2a and side plate part 4a of the part 2, a suction force (hereinafter referred to as electromagnetic suction) is formed between the side plate part 2c of the fixed core part 2 and the second arm 5c of the movable core part 5. When the electromagnetic attraction force becomes larger than the attraction force generated by the permanent magnet 3 between the end plate portion 4b of the magnetic pole plate 4 and the first arm 5b of the movable iron core portion 5, the movable iron core is generated. The part 5 strokes leftward in FIG. 1, and the second arm 5 of the movable core part 5 is attracted to the other end plate part 2 b of the fixed core part 2, so that the closing state is maintained. .

JP 2007-207777 A

By the way, in the conventional polarized electromagnet, the second arm 5c and the other end plate portion 2b face each other in parallel while being orthogonal to the moving direction of the movable iron core portion 5, and therefore the other end plate portion 2b and the second end plate portion 2b. The magnetic gap A <b> 1 between the arms 5 c has the same large dimension as the stroke amount of the movable iron core part 5.
When the magnetic gap A1 is thus large, leakage of magnetic flux flowing from the other end plate portion 2b to the second arm 5c is likely to occur when the electromagnetic coil 1 is in an excited state, and the electromagnetic attractive force of the electromagnetic coil 1 is reduced. There is a risk. In order to compensate for the decrease in the electromagnetic attractive force due to the magnetic flux leakage, the large electromagnetic coil 1 is required. However, if the large electromagnetic coil 1 having the increased axial dimension L1 and radial dimension D1 is used, a pole is provided. There are problems in terms of miniaturization of electromagnets and power consumption.
Accordingly, the present invention provides a polarized electromagnet capable of reducing the electromagnetic attraction force of the electromagnetic coil required by setting the magnetic gap small with respect to the stroke amount of the movable iron core, thereby reducing the size and reducing the power consumption. And to provide an electromagnetic contactor.

  In order to achieve the above object, the polarized electromagnet according to claim 1 according to the present invention, the movable iron core is inserted into the insertion hole of the electromagnetic coil, and the first movable plate is fixed to one end of the movable iron core, A movable iron core portion having a second movable plate fixed to the other end of the movable iron core rod, and a fixed plate facing the first movable plate connected to one end of a fixed side plate extending along the outer periphery of the electromagnetic coil; A fixed iron core portion having the other end of the fixed side plate disposed around a movable space of the second movable plate; a permanent magnet disposed between an outer periphery of the electromagnetic coil and the fixed side plate; and the second movable plate. A return spring that applies a spring force so as to be positioned on the electromagnetic coil side, and a rotating magnetic path portion disposed in the movable space in the vicinity of the fixed side plate. When the coil is excited, the movable core portion between the fixed side plate and the rotating magnetic path portion Electromagnetic attraction force is generated in the magnetic gap provided in the direction perpendicular to the moving direction, by rotating such that the magnetic gap is reduced to move the second movable plate in a direction away from the electromagnetic coil.

  According to the present invention, since the magnetic gap is provided in the direction orthogonal to the moving direction of the movable core portion between the rotating magnetic path portion and the fixed side plate, the magnetic gap having a small size with respect to the stroke amount of the movable core portion. Can be set to When this magnetic gap becomes a small value, leakage of magnetic flux flowing from the fixed side plate to the rotating magnetic path portion is reduced when the electromagnetic coil is in an excited state, so that it is possible to prevent a decrease in electromagnetic attractive force of the electromagnetic coil. .

According to a second aspect of the present invention, in the polarized electromagnet according to the first aspect of the present invention, the rotating magnetic path portion includes a first magnetic path portion engaged with the second movable plate and the fixed side plate. When the electromagnetic coil is excited with the magnetic path part body provided with the second magnetic path part in proximity with the magnetic gap provided therebetween, the magnetic gap between the fixed side plate and the magnetic side part part is reduced. A rotation support unit that supports rotation of the magnetic path unit main body so that the two magnetic path units move and the first magnetic path unit moves to a position where movement of the second movable plate is not restricted. It has.
According to the present invention, the circuit magnetic path portion provided with the magnetic gap between the fixed side plate moves to a position where the magnetic path portion main body does not restrict the lower side movement of the second movable plate. The stroke amount can be secured.

The invention according to claim 3 is an electromagnetic contactor comprising the polarized electromagnet according to claim 1 or 2, wherein a contact mechanism is connected to the movable core portion, and excitation or de-excitation of the electromagnetic coil is performed. The movable iron core portion is moved to open and close the movable contact and the fixed contact of the contact mechanism.
The electromagnetic contactor of the present invention can be a compact device with a small installation space, and an electromagnetic contactor with reduced power consumption can be obtained.

According to the polarized electromagnet according to the present invention, since the magnetic gap is provided in a direction orthogonal to the moving direction of the movable core portion between the rotating magnetic path portion and the fixed side plate, the stroke amount of the movable core portion is determined. The magnetic gap can be set to a small size, and when the magnetic gap becomes a small value, when the electromagnetic coil is in an excited state, leakage of magnetic flux flowing from the fixed side plate to the rotating magnetic path portion is reduced. A decrease in electromagnetic attractive force can be prevented. Therefore, the present invention makes it possible to obtain the required electromagnetic attraction even if a normal electromagnetic coil is used because the magnetic flux leakage of the magnetic gap is reduced. And lower coil power consumption can be achieved.
In addition, according to the electromagnetic contactor according to the present invention, the mounting space can be reduced, and a compact electromagnetic contactor that can be easily handled can be obtained. Can be performed reliably.

It is a perspective view which shows the external appearance of the electromagnetic contactor which concerns on this invention. It is sectional drawing which shows the release state of the electromagnetic contactor of 1st Embodiment which concerns on this invention. It is sectional drawing which shows the injection state of the electromagnetic contactor of 1st Embodiment which concerns on this invention. It is a figure which shows the structure of the rotation magnetic path part of 1st Embodiment which concerns on this invention. It is sectional drawing which shows the release state of the electromagnetic contactor of 2nd Embodiment which concerns on this invention. It is sectional drawing which shows the injection state of the electromagnetic contactor of 2nd Embodiment which concerns on this invention. It is a figure which shows the structure of the rotation magnetic path part of 2nd Embodiment which concerns on this invention. It is sectional drawing which shows the release state of the electromagnetic contactor of 3rd Embodiment which concerns on this invention. It is sectional drawing which shows the injection state of the electromagnetic contactor of 3rd Embodiment which concerns on this invention. It is a figure which shows the structure of the rotation magnetic path part of 3rd Embodiment which concerns on this invention. It is sectional drawing which shows the release state of the conventional polarized electromagnet.

DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings.
(First embodiment)
FIG. 1 shows the external appearance of an electromagnetic contactor 10 according to the present invention, and FIG. 2 shows the internal structure of the released state of the electromagnetic contactor 10 according to the first embodiment. The electromagnetic contactor 10 includes a first case 11. The poled electromagnet 12 housed in the first case 11, the contact mechanism 14 housed in the second case 13 integrally connected to the first case 11, and the movable core part 27 of the poled electromagnet 12 housed in the first case 11. And a return spring 15 that applies a spring urging force to the movable holder 16 of the contact mechanism 14 in the release direction.

  As shown in FIG. 2, the contact mechanism 14 is attached to the movable holder 16, the plurality of movable contacts 17, the plurality of pairs of fixed contacts 18 disposed in the second case 13, and the opening of the second case 13. The arc extinguishing cover 22 is provided. That is, a plurality of pairs of fixed contacts 18 are fixed to the second case 13, and a fixed contact 19 is provided at the end of each fixed contact 18. Further, the movable holder 16 is disposed in the second case 13 so as to be movable in the vertical direction of FIG. 2, and the movable holder 16 holds a plurality of movable contacts 17. Each movable contact 17 is provided with a movable contact 20 at a position opposed to the fixed contact 19 of the plurality of pairs of fixed contacts 18, and is also directed toward the movable contact 17 in a direction in which the movable contact 20 is pressed against the fixed contact 19. A contact spring 21 for applying a spring biasing force is provided.

The polarized electromagnet 12 includes a spool 23, a pair of fixed iron core portions 24, a pair of magnetic pole plates 25, a pair of permanent magnets 26, a movable iron core portion 27, and a pair of rotating magnetic path portions 41 disposed in the first case 11. It has.
The spool 23 includes a cylindrical electromagnetic coil 32 in which an insertion hole 31 is formed.
The pair of magnetic pole plates 25 is a plate member having an end plate portion 33 and a side plate portion 34 bent in an L shape, and is fixed to the spool 23 so that the end plate portion 33 is close to one end of the electromagnetic coil 32. The side plate portion 34 is disposed along the outer periphery of the electromagnetic coil 32. A rectangular plate-shaped permanent magnet 26 is fixed to the surface of the pair of magnetic pole plates 25 facing the outside of the side plate portion 34.

The pair of fixed iron core portions 24 are plate members including a fixed side plate 35 and a fixed plate 36 that is bent inwardly from one end in the longitudinal direction of the fixed side plate 35 at an angle smaller than 90 °.
These fixed iron core portions 24 are in a state in which the other end in the longitudinal direction of the fixed side plate 35 is in contact with the bottom wall 11 a of the first case 11 and a part of the fixed side plate 35 is engaged with the side wall 11 b of the first case 11. It is mounted inside the first case 11.

The spool 23 is in a state in which the permanent magnet 26 is in contact with the surface facing the inward side of the fixed side plate 35, and the direction in which the fixed side plate 35 of the fixed iron core 24 extends in the vertical direction of FIG. It arrange | positions inside a pair of fixed iron core part 24 so that the axis line of the insertion hole 31 may become parallel.
Here, a movable space S is provided between one end of the spool 23 and the bottom wall 11 a of the first case 11, and the fixed side plate 35 of the fixed iron core portion 24 is located around the movable space S. Yes.

The movable iron core portion 27 includes a movable iron core rod 28, a first movable plate 29 and a second movable plate 30, and the movable iron core rod 28 of the movable iron core portion 27 slides in the insertion hole 31 of the electromagnetic coil 32. It is inserted freely.
A flat plate-shaped second movable plate 30 located in the aforementioned movable space S is fixed to one end of the movable core rod 28, and a first movable plate 29 is fixed to the other end of the movable core rod 28. ing.

The first movable plate 29 is formed by bending a movable orthogonal portion 38 that is orthogonally fixed to the other end of the movable iron core 28, and bent from both ends of the movable orthogonal portion 38. 36 and a pair of movable armature portions 39 facing in parallel with each other.
The central portion of the first movable plate 29 of the movable iron core 27 is connected to the movable holder 16 of the contact mechanism 14 via a connecting member 40, and the movable iron core 27 and the movable holder 16 are arranged in the vertical direction in FIG. It is designed to move synchronously.

The return spring 15 is disposed between the bottom wall 11a of the first case 11 and the second movable plate 30 of the movable core portion 27 (movable space S), and is released in the release direction (with respect to the movable core portion 27 and the movable holder 16). A spring biasing force is applied in the upper direction of FIG.
The pair of rotating magnetic path portions 41 are provided in the movable space S, rotate in conjunction with the second movable plate 30 of the movable core portion 27, and have a magnetic gap between the fixed side plate 35 of the fixed core portion 24. A member provided with A.

As shown in FIG. 4, one rotating magnetic path portion 41 includes a magnetic path portion main body 42 formed by bending a plate member in a substantially L shape, and a bent portion of the magnetic path portion main body 42 in the plate width direction. A rotation pin 43 that protrudes outward and serves as a rotation center, an engagement slot 44 that is formed on the side wall of the first case 11 and engages with the rotation pin 43, and a part of the magnetic path portion main body 42 are provided. And an engaging member 45 to be interlocked with the second movable plate 30.
The magnetic path part main body 42 includes a long first magnetic path part 42a and a short second magnetic path part 42b. The engagement long hole 44 is formed such that its long axis extends in a direction perpendicular to the movable direction of the second movable plate 30. The magnetic path portion main body 42 has the first magnetic path portion 42 a facing the second movable plate 30 and the second magnetic path portion 42 b facing the fixed side plate 35, and the rotation pin 43 is the engagement slot 44. Is engaged.

The engaging member 45 is sandwiched between the second movable plate 30 and the distal end portion of the first magnetic path portion 42a, and is moved from the return spring 15 in the direction toward the second movable plate 30 (upward in FIG. 4). Energizing power is given. Thereby, the magnetic path part main body 42 moves in the moving direction of the second movable plate 30 and can move in the direction orthogonal to the moving direction of the second movable plate 30 and the engaging member 45 and It is sandwiched between the second movable plates 30. In the released electromagnetic contactor 10 of FIGS. 2 and 4, a magnetic gap A is provided between the second magnetic path portion 42 b of the rotating magnetic path portion 41 and the fixed side plate 35.
The other rotating magnetic path portion 41 also includes similar components with the engaging member 45 as a common member of the one rotating magnetic path portion 41.
Here, the rotation support portion of the present invention corresponds to the rotation pin 43 and the engagement long hole 44.

Next, the operation of the electromagnetic contactor 10 having the above configuration will be described with reference to FIGS.
FIG. 2 shows the electromagnetic contactor 10 in a released state. In the released electromagnetic contactor 10, the electromagnetic coil 32 is in a non-excited state. At this time, the magnetic flux of the permanent magnet 26 circulates in the forward path of the magnetic pole plate 25, the second movable plate 30, the magnetic path portion main body 42 of the rotating magnetic path portion 41, the fixed side plate 35, and the permanent magnet 26. The suction force between the 25 end plate portions 33 and the second movable plate 30 of the movable iron core portion 27 is increased. Thereby, the second movable plate 30 of the movable iron core portion 27 moves to the upper side in FIG. 2 by the return force of the return spring 15 and the attractive force of the permanent magnet 26 so as to come close to the end plate portion 33 of the magnetic pole plate 25. Adsorbed to the end of the spool 23.

  And with the movement of the 2nd movable plate 30, the movable iron core part 27 whole also moves to the upper part of Drawing 2, and movable holder 16 of contact mechanism 14 connected with the 1st movable plate 29 via connecting member 40, Move to the upper side of FIG. Thereby, the movable contact 20 provided in the movable holder 16 is positioned in a state of being separated from the fixed contact 19 provided in the second case 13, and the released state of the electromagnetic contactor 10 is maintained.

  FIG. 3 shows the electromagnetic contactor 10 in the input state. In the electromagnetic contactor 10 in the charged state, the electromagnetic coil 32 is in an excited state. At this time, the magnetic flux of the electromagnetic coil 32 is the first magnetic flux circulating through the movable iron core 28, the movable orthogonal portion 38, the movable armature portion 39, the fixed plate 36, the permanent magnet 26, and the magnetic pole plate 25, and the movable iron rod 28. , The movable orthogonal portion 38, the movable armature portion 39, the fixed plate 36, the fixed side plate 35, the magnetic path portion main body 42 of the rotating magnetic path portion 41, and the second magnetic flux circulating through the second movable plate 30.

The magnetic gap between the fixed plate 36 of the fixed core portion 24 and the movable armature portion 39 of the first movable plate 29, and the magnetism between the second magnetic path portion 42 b of the rotating magnetic path portion 41 and the fixed side plate 35. An attractive force (hereinafter referred to as an electromagnetic attractive force) is generated in the gap A.
The electromagnetic attractive force of the electromagnetic coil 32 is larger than the attractive force generated by the permanent magnet 26 between the end plate portion 33 of the magnetic pole plate 25 and the second movable plate 30 of the movable iron core portion 27 and the spring force of the return spring 15. Then, in the rotating magnetic path portion 41, the second magnetic path portion 42 b moves so that the magnetic gap A between the fixed side plate 35 is small, and the first magnetic path portion 42 a is the bottom wall 11 a of the first case 11. The magnetic path section main body 42 rotates around the rotation pin 43 so that the rotation pin 43 slides toward the fixed side plate 35 in the engagement long hole 44.

As the magnetic path section main body 42 rotates, the second movable plate 30 attracted to the first magnetic path section 42a moves to the lower side in FIG. 3, and the movable iron core section 27 moves by a predetermined stroke amount T.
Then, the movable holder 16 of the contact mechanism 14 is moved to the lower side of FIG. 3 together with the first movable plate 29 moving to the lower side of FIG. 3, and the movable contact 20 provided on the movable holder 16 is attached to the second case 13. It contacts the fixed contact 19 provided, and the charged state of the electromagnetic contactor 10 is maintained.

Next, the effect of this embodiment will be described.
The polarized electromagnet 12 of the present embodiment provides a magnetic gap A between the second magnetic path portion 42 b of the rotating magnetic path portion 41 and the fixed side plate 35, which is a direction orthogonal to the moving direction of the movable iron core portion 27. The magnetic gap A can be set to a small dimension (A <T) with respect to the stroke amount T of the movable iron core portion 27.
When the magnetic gap A becomes a small value, leakage of magnetic flux flowing from the fixed side plate 35 to the rotating magnetic path portion 41 is reduced when the electromagnetic coil 32 is in an excited state, so that the electromagnetic attractive force of the electromagnetic coil 32 is reduced. Can be prevented.
Therefore, in the present embodiment, since the magnetic flux leakage of the magnetic gap A is reduced, the required electromagnetic attraction force can be obtained even when the normal electromagnetic coil 32 is used. The polar electromagnet 12 can be downsized and the power consumption of the coil can be reduced.

Further, the circuit magnetic path portion 41 provided with the magnetic gap A between the fixed side plate 35 and the magnetic path portion main body 42 in which the rotation pin 43 engages and moves in the engagement elongated hole 44 has the second movable plate 30. Therefore, the stroke amount T required for the movable iron core portion 27 can be ensured.
In addition, the electromagnetic contactor 10 provided with the polarized electromagnet 12 can also reduce the mounting space and can be a compact device that is easy to handle, and also releases the contact mechanism 14 while reducing power consumption. In addition, the charging operation can be performed reliably.

(Second Embodiment)
Next, FIGS. 5 to 7 show the internal structure of the electromagnetic contactor 10 according to the second embodiment of the present invention. Note that the same components as those in the first embodiment shown in FIGS. 2 to 4 are denoted by the same reference numerals and description thereof is omitted.
In the polarized electromagnet 12 of the present embodiment, a pair of rotating magnetic path portions 51 are arranged in the movable space S, and the pair of rotating magnetic path members 51 are connected to the second movable plate 30 of the movable iron core portion 27. The magnetic gap A is provided between the fixed iron core portion 24 and the fixed side plate 35 by rotating in conjunction with each other.

As shown in FIG. 7, one rotating magnetic path portion 51 includes a magnetic path portion main body 52 formed by bending a plate member in a substantially L shape, and a rotating pin 53 fixed to the magnetic path portion main body 52. An engagement hole (not shown) that is formed on the side wall of the first case 11 and engages with the rotation pin 53; and an engagement member 55 that interlocks a part of the magnetic path portion main body 52 with the second movable plate 30. It has.
The magnetic path part main body 52 is composed of a long first magnetic path part 52a and a short second magnetic path part 52b, and a rotation pin 53 is provided on the distal end side of the second magnetic path part 52b. Yes. The rotation pin 53 is engaged with the engagement hole in a state where the first magnetic path portion 52a faces the second movable plate 30 and the second magnetic path portion 52b faces the fixed side plate 35.

The engaging member 55 is sandwiched between the second movable plate 30 and the distal end portion of the first magnetic path portion 52a, and springs from the return spring 15 in the direction toward the second movable plate 30 (upward direction in FIG. 7). Energizing power is given. Thereby, the magnetic path part main body 52 is sandwiched between the engaging member 55 and the second movable plate 30 so as to be movable in the moving direction of the second movable plate 30. In the released electromagnetic contactor 10 of FIGS. 5 and 7, a magnetic gap A is provided between the second magnetic path portion 52 b of the rotating magnetic path portion 51 and the fixed side plate 35.
The other rotating magnetic path portion 51 also includes similar components with the engaging member 55 as a common member of the one rotating magnetic path portion 41.
Here, the rotation support portion of the present invention corresponds to the rotation pin 53 and the engagement hole.

Next, operation | movement of the electromagnetic contactor 10 of this embodiment is demonstrated with reference to FIG.5 and FIG.6.
In the released electromagnetic contactor 10, the electromagnetic coil 32 is in a non-excited state, as shown in FIG. The magnetic flux of the permanent magnet 26 circulates in the forward path of the magnetic pole plate 25, the second movable plate 30, the magnetic path portion main body 52 of the rotating magnetic path portion 51, the fixed side plate 35, and the permanent magnet 26. The suction force between the plate portion 33 and the second movable plate 30 of the movable iron core portion 27 is increased. Thereby, the second movable plate 30 of the movable iron core portion 27 moves to the upper side in FIG. 2 by the return force of the return spring 15 and the attractive force of the permanent magnet 26 so as to come close to the end plate portion 33 of the magnetic pole plate 25. Adsorbed to the end of the spool 23.

  As the second movable plate 30 moves, the entire movable iron core 27 moves to the upper side in FIG. 5, and the movable holder 16 of the contact mechanism 14 connected to the first movable plate 29 via the connecting member 40 also includes: Move to the upper side of FIG. Thereby, the movable contact 20 provided in the movable holder 16 is positioned in a state of being separated from the fixed contact 19 provided in the second case 13, and the released state of the electromagnetic contactor 10 is maintained.

  As shown in FIG. 6, the electromagnetic contactor 10 in the charged state has the electromagnetic coil 32 in an excited state. At this time, the magnetic flux of the electromagnetic coil 32 is the first magnetic flux circulating through the movable iron core 28, the movable orthogonal portion 38, the movable armature portion 39, the fixed plate 36, the permanent magnet 26, and the magnetic pole plate 25, and the movable iron rod 28. The movable orthogonal portion 38, the movable armature portion 39, the fixed plate 36, the fixed side plate 35, the magnetic path portion main body 52 of the rotating magnetic path portion 51, and the second magnetic flux circulating through the second movable plate 30.

Then, the magnetic gap between the fixed plate 36 of the fixed core portion 24 and the movable armature portion 39 of the first movable plate 29, and the magnetism between the second magnetic path portion 52 b of the rotating magnetic path portion 51 and the fixed side plate 35. An attractive force (hereinafter referred to as an electromagnetic attractive force) is generated in the gap A.
The electromagnetic attractive force of the electromagnetic coil 32 is larger than the attractive force generated by the permanent magnet 26 between the end plate portion 33 of the magnetic pole plate 25 and the second movable plate 30 of the movable iron core portion 27 and the spring force of the return spring 15. Then, in the rotating magnetic path portion 51, the second magnetic path portion 52b moves so that the magnetic gap A between the fixed side plate 35 and the first magnetic path portion 52a becomes the bottom wall 11a of the first case 11. The magnetic path section main body 52 rotates about the rotation pin 53 so as to be parallel to the rotation pin 53.

As the magnetic path unit main body 52 rotates, the second movable plate 30 attracted to the first magnetic path unit 52a moves to the lower side in FIG. 6 and the movable iron core unit 27 moves by a predetermined stroke amount T.
Then, the movable holder 16 of the contact mechanism 14 moves together with the first movable plate 29 that moves downward in FIG. 6, and the movable contact 20 provided on the movable holder 16 moves to the second case 13. It contacts the fixed contact 19 provided, and the charged state of the electromagnetic contactor 10 is maintained.

Next, the effect of this embodiment will be described.
The polarized electromagnet 12 of this embodiment is provided with a magnetic gap A between the second magnetic path portion 52 b of the rotating magnetic path portion 51 and the fixed side plate 35, which is a direction orthogonal to the moving direction of the movable core portion 27. The magnetic gap A can be set to a small dimension (A <T) with respect to the stroke amount T of the movable iron core portion 27.
When the magnetic gap A becomes a small value, leakage of magnetic flux flowing from the fixed side plate 35 to the rotating magnetic path portion 51 is reduced when the electromagnetic coil 32 is in an excited state, so that the electromagnetic attractive force of the electromagnetic coil 32 is reduced. Can be prevented.
Therefore, in the present embodiment, since the magnetic flux leakage of the magnetic gap A is reduced, the required electromagnetic attraction force can be obtained even when the normal electromagnetic coil 32 is used. The polar electromagnet 12 can be downsized and the power consumption of the coil can be reduced.

In addition, the circuit magnetic path portion 51 provided with the magnetic gap A between the fixed side plate 35 rotates around the rotation pin 53 to a position where the magnetic path portion main body 42 does not restrict the lower side movement of the second movable plate 30. Since it moves, the stroke amount T required for the movable iron core 27 can be secured.
In addition, the electromagnetic contactor 10 provided with the polarized electromagnet 12 can also reduce the mounting space and can be a compact device that is easy to handle, and also releases the contact mechanism 14 while reducing power consumption. In addition, the charging operation can be performed reliably.

(Third embodiment)
Next, FIGS. 8 to 10 show an internal structure of the electromagnetic contactor 10 according to the third embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment shown in FIGS. 2 to 4 are denoted by the same reference numerals, and description thereof is omitted.
In the polarized electromagnet 12 of the present embodiment, a pair of rotating magnetic path portions 61 are disposed in the movable space S, and the pair of rotating magnetic path members 61 are connected to the second movable plate 30 of the movable core portion 27. The magnetic gap A is provided between the fixed iron core portion 24 and the fixed side plate 35 by rotating in conjunction with each other.
As shown in FIG. 8, one rotating magnetic path portion 61 is provided at a magnetic path portion main body 62 in which a plate member is bent in a substantially L shape, and at an end portion of the magnetic path portion main body 62. A rotation pin 63 serving as a moving center and an engagement portion 64 provided at a lower portion of the second movable plate 30 and engaged with the rotation pin 63 are provided.

As shown in FIG. 10, the magnetic path part main body 62 is composed of a long first magnetic path part 62 a and a short second magnetic path part 62 b, and the rotation pin 63 is a first magnetic path. It protrudes in the plate width direction from the front end side of the portion 62a.
The engaging portion 64 is formed with an engaging long hole 64a having a long axis extending in a direction perpendicular to the moving direction of the second movable plate 30, and the magnetic path portion main body 62 has a first magnetic path. The rotation pin 63 is engaged with the engagement elongated hole 64a in a state where the portion 62a faces the second movable plate 30 and the second magnetic path portion 62b faces the fixed side plate 35.
The other rotating magnetic path portion 41 also includes the same components as the one rotating magnetic path portion 61.
Here, the rotation support part of this invention respond | corresponds to the rotation pin 63 and the engaging part 64 (engagement long hole 64a).

Next, operation | movement of the electromagnetic contactor 10 of this embodiment is demonstrated with reference to FIG.8 and FIG.9.
As shown in FIG. 8, in the released electromagnetic contactor 10, the electromagnetic coil 32 is in a non-excited state. The magnetic flux of the permanent magnet 26 circulates in the forward path of the magnetic pole plate 25, the second movable plate 30, the magnetic path portion main body 52 of the rotating magnetic path portion 61, the fixed side plate 35, and the permanent magnet 26. The suction force between the plate portion 33 and the second movable plate 30 of the movable iron core portion 27 is increased. Thereby, the second movable plate 30 of the movable iron core portion 27 moves to the upper side in FIG. 2 by the return force of the return spring 15 and the attractive force of the permanent magnet 26 so as to come close to the end plate portion 33 of the magnetic pole plate 25. Adsorbed to the end of the spool 23.

As the second movable plate 30 moves, the entire movable iron core 27 moves to the upper side of FIG. 8, and the movable holder 16 of the contact mechanism 14 connected to the first movable plate 29 via the connecting member 40 also includes: Move to the upper side of FIG. Thereby, the movable contact 20 provided in the movable holder 16 is positioned in a state of being separated from the fixed contact 19 provided in the second case 13, and the released state of the electromagnetic contactor 10 is maintained.
In the electromagnetic contactor 10 in the charged state, the electromagnetic coil 32 is in an excited state, as shown in FIG. At this time, the magnetic flux of the electromagnetic coil 32 is the first magnetic flux circulating through the movable iron core 28, the movable orthogonal portion 38, the movable armature portion 39, the fixed plate 36, the permanent magnet 26, and the magnetic pole plate 25, and the movable iron rod 28. , The movable orthogonal portion 38, the movable armature portion 39, the fixed plate 36, the fixed side plate 35, the magnetic path portion main body 62 of the rotating magnetic path portion 61, and the second magnetic flux circulating through the second movable plate 30.

The magnetic gap between the fixed plate 36 of the fixed core portion 24 and the movable armature portion 39 of the first movable plate 29 and the magnetism between the second magnetic path portion 62 b of the rotating magnetic path portion 61 and the fixed side plate 35. An attractive force (hereinafter referred to as an electromagnetic attractive force) is generated in the gap A.
The electromagnetic attractive force of the electromagnetic coil 32 is larger than the attractive force generated by the permanent magnet 26 between the end plate portion 33 of the magnetic pole plate 25 and the second movable plate 30 of the movable iron core portion 27 and the spring force of the return spring 15. Then, in the rotating magnetic path portion 61, the second magnetic path portion 62b moves so that the magnetic gap A between the fixed side plate 35 and the first magnetic path portion 62a becomes the bottom wall 11a of the first case 11. The magnetic path portion main body 62 rotates around the rotation pin 63 so that the rotation pin 63 slides toward the fixed side plate 35 in the engagement long hole 64a of the engagement portion 64 so as to be parallel to the rotation pin 63. I will do it.

As the magnetic path portion main body 62 rotates, the second movable plate 30 attracted to the first magnetic path portion 62a moves to the lower side in FIG. 9 and the movable iron core portion 27 moves by a predetermined stroke amount T.
Then, the movable holder 16 of the contact mechanism 14 is moved to the lower side of FIG. 9 together with the first movable plate 29 moving to the lower side of FIG. 9, and the movable contact 20 provided on the movable holder 16 is attached to the second case 13. It contacts the fixed contact 19 provided, and the charged state of the electromagnetic contactor 10 is maintained.

Next, the effect of this embodiment will be described.
The polarized electromagnet 12 of the present embodiment is provided with a magnetic gap A between the second magnetic path portion 62 b of the rotating magnetic path portion 61 and the fixed side plate 35, which is a direction orthogonal to the moving direction of the movable core portion 27. The magnetic gap A can be set to a small dimension (A <T) with respect to the stroke amount T of the movable iron core portion 27.
When the magnetic gap A becomes a small value, leakage of magnetic flux flowing from the fixed side plate 35 to the rotating magnetic path portion 51 is reduced when the electromagnetic coil 32 is in an excited state, so that the electromagnetic attractive force of the electromagnetic coil 32 is reduced. Can be prevented.
Therefore, in the present embodiment, since the magnetic flux leakage of the magnetic gap A is reduced, the required electromagnetic attraction force can be obtained even when the normal electromagnetic coil 32 is used. The polar electromagnet 12 can be downsized and the power consumption of the coil can be reduced.

Further, the circuit magnetic path portion 61 provided with the magnetic gap A between the fixed side plate 35 and the magnetic path portion main body 42 with which the rotation pin 63 is engaged in the engagement long hole 64a of the engagement portion 64 is the first. 2 Since it moves to a position where the lower side movement of the movable plate 30 is not restricted, the stroke amount T required by the movable iron core 27 can be secured.
In addition, the electromagnetic contactor 10 provided with the polarized electromagnet 12 can also reduce the mounting space and can be a compact device that is easy to handle, and also releases the contact mechanism 14 while reducing power consumption. In addition, the charging operation can be performed reliably.

DESCRIPTION OF SYMBOLS 10 ... Electromagnetic contactor, 11 ... 1st case, 11a ... Bottom wall, 11b ... Side wall, 12 ... Polarized electromagnet, 13 ... 2nd case, 14 ... Contact mechanism, 15 ... Return spring, 16 ... Movable holder, 17 ... Movable contact, 18 ... stationary contact, 19 ... fixed contact, 20 ... movable contact, 22 ... arc extinguishing cover, 23 ... spool, 24 ... fixed iron core, 25 ... magnetic pole plate, 26 ... permanent magnet, 27 ... movable iron core , 28 ... movable iron core, 29 ... first movable plate, 30 ... second movable plate, 31 ... insertion hole, 32 ... electromagnetic coil, 33 ... end plate portion, 34 ... side plate portion, 35 ... fixed side plate, 36 ... Fixed plate, 38 ... movable orthogonal part, 39 ... movable armature part, 40 ... connecting member, 41, 51, 61 ... rotating magnetic path part, 42, 52, 62 ... magnetic path part body, 42a, 52a, 62a ... 1st magnetic path part, 42b, 52b, 62b ... 2nd magnetic path part, 43, 53, 63 ... times Pins, 44,64A ... long engagement hole, 45, 55 ... engaging member 64 ... engaging portion, A ... magnetic gap, S ... movable space

Claims (3)

A movable iron core that is inserted through the insertion hole of the electromagnetic coil, the first movable plate is fixed to one end of the movable iron core, and the second movable plate is fixed to the other end of the movable iron core;
A fixed plate facing the first movable plate is connected to one end of a fixed side plate extending along the outer periphery of the electromagnetic coil, and the other end of the fixed side plate is disposed around the movable space of the second movable plate. Fixed iron core,
A permanent magnet disposed between the outer periphery of the electromagnetic coil and the fixed side plate;
A return spring that exerts a spring force so that the second movable plate is positioned on the electromagnetic coil side;
A rotating magnetic path portion disposed in the movable space close to the fixed side plate,
When the electromagnetic coil is excited, the rotating magnetic path portion generates an electromagnetic attractive force in a magnetic gap provided in a direction perpendicular to the moving direction of the movable core portion between the fixed side plate and the rotating magnetic path portion. Then, the polarized electromagnet is rotated so as to reduce the magnetic gap and moves the second movable plate in a direction away from the electromagnetic coil. The rotating magnetic path part includes a first magnetic path part engaged with the second movable plate and a second magnetic path part adjacent to the fixed side plate by providing the magnetic gap. A magnetic path body,
When the electromagnetic coil is excited, the second magnetic path portion moves so that the magnetic gap between the fixed side plate and the first magnet is moved to a position where movement of the second movable plate is not restricted. The polarized electromagnet according to claim 1, further comprising: a rotation support unit that supports rotation of the magnetic path unit main body so that the path unit moves. An electromagnetic contactor comprising the polarized electromagnet according to claim 1 or 2,
An electromagnetic mechanism characterized in that a contact mechanism is connected to the movable iron core, and the movable and fixed contacts of the contact mechanism are opened and closed by moving the movable iron core when the electromagnetic coil is excited or de-energized. Contactor.

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