WO2011125142A1 - Polar electromagnet and electromagnetic contact - Google Patents

Polar electromagnet and electromagnetic contact Download PDF

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Publication number
WO2011125142A1
WO2011125142A1 PCT/JP2010/007382 JP2010007382W WO2011125142A1 WO 2011125142 A1 WO2011125142 A1 WO 2011125142A1 JP 2010007382 W JP2010007382 W JP 2010007382W WO 2011125142 A1 WO2011125142 A1 WO 2011125142A1
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WO
WIPO (PCT)
Prior art keywords
movable
fixed
iron core
plate
electromagnetic coil
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PCT/JP2010/007382
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French (fr)
Japanese (ja)
Inventor
勝昭 渡邊
英樹 代島
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富士電機機器制御株式会社
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Publication of WO2011125142A1 publication Critical patent/WO2011125142A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2209—Polarised relays with rectilinearly movable armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • H01F7/1615—Armatures or stationary parts of magnetic circuit having permanent magnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements

Definitions

  • the present invention relates to a polarized electromagnet including a permanent magnet and an electromagnetic coil, and an electromagnetic contactor including the polarized electromagnet.
  • 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. 6, 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.
  • the movable iron core 5 is urged to the right in FIG. 6 by a return spring (not shown).
  • 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
  • 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.
  • 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.
  • 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.
  • the magnetic flux of the electromagnetic coil 1 is changed so that the side plate portion 2c of the fixed core portion 2, the other end plate portion 2b, the second arm 5c of the movable core portion 5, the iron core rod 5a, and the fixed iron core.
  • a suction force hereinafter referred to as electromagnetic suction
  • the movable iron core is generated.
  • the part 5 is displaced 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. .
  • 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 contact surface gap A1 between the arms 5c has the same large dimension as the amount by which the movable iron core 5 is displaced.
  • an object of the present invention is to provide a polarized electromagnet and an electromagnetic contactor that can be reduced in size and power consumption while satisfying the required electromagnetic attractive force of an electromagnetic coil.
  • a polarized electromagnet is configured to insert a movable iron core rod into an insertion hole of an electromagnetic coil wound in a cylindrical shape from one end face of the electromagnetic coil.
  • the first movable counter plate is fixed to one end of the protruding movable iron core rod, and the second movable counter plate is fixed to the other end of the movable iron core rod protruding from the other end surface of the electromagnetic coil, and the movable iron core portion is disposed.
  • the first fixed counter plate is spaced apart from the first movable counter plate, the second fixed counter plate is opposed to the second movable counter plate, and the first and second fixed counter plates are separated from each other.
  • the fixed side plate to be connected is extended along the outer periphery of the electromagnetic coil, the fixed core portion is disposed, the permanent magnet is disposed between the outer periphery of the electromagnetic coil and the fixed side plate, and the electromagnetic coil is excited.
  • the gap between the first fixed counter plate and the first movable counter plate is electrically charged.
  • the first movable counter plate is displaced toward the first fixed counter plate against the spring force of the return spring and the attraction force of the permanent magnet, so that the movable iron core moves.
  • the first fixed facing plate and the first movable facing plate are formed with armature portions facing each other in parallel while extending obliquely with respect to the moving direction of the movable core portion.
  • the fixed counter plate and the movable counter plate that are parallel to each other while being orthogonal to the moving direction of the movable iron core are opposed to the fixed counter plate and the movable counter plate that generate an electromagnetic attraction force by the excitation of the electromagnetic coil.
  • the gap between the plates has the same large dimension as the displacement of the movable iron core.
  • the polarized electromagnet according to one embodiment of the present invention has a first stationary counter plate and a first movable counter plate that generate an electromagnetic attraction force by excitation of the electromagnetic coil with respect to the movable direction of the movable iron core.
  • the armature portions that extend obliquely and face each other in parallel are formed, even if the displacement amount of the movable iron core portion is set to the same dimension as that of the conventional polarized electromagnet, the first fixed opposing plate and the first The gap between the contact portions provided on the movable counter plate is smaller than the gap of the conventional device.
  • the gap between the contact portions provided on the first fixed counter plate and the first movable counter plate becomes a small value, when the electromagnetic coil is in the excited state, the first fixed counter plate And since the leakage of the magnetic flux which flows between the armature parts provided in the 1st movable counterplate reduces, the fall of the electromagnetic attraction force of an electromagnetic coil can be prevented.
  • the polarized electromagnet according to one embodiment of the present invention can obtain the required electromagnetic attraction force even when a normal electromagnetic coil is used because the magnetic flux leakage in the gap is reduced. This eliminates the need for miniaturization of the polarized electromagnet and low power consumption of the coil.
  • the armature portion of the first movable counter plate is a portion where the edge of the first movable counter plate is bent so as to face the armature portion of the first fixed counter plate in parallel. is there.
  • the armature portion of the first fixed facing plate and the armature portion of the first movable facing plate are bent portions of the plate material, and the displacement of the movable iron core portion Since a structure in which the gap is made smaller than the amount can be easily obtained, the manufacturing cost of the polarized electromagnet can be reduced.
  • the polarized electromagnet according to one embodiment of the present invention is the above-described permanent magnet in which the armature portion of the first fixed counter plate is disposed between the outer periphery of the electromagnetic coil and the fixed side plate. It is bent obliquely in the direction of separation.
  • the magnetic pole of the permanent magnet is in an excited state of the electromagnetic coil because the armature portion of the first fixed counter plate is arranged away from the permanent magnet. There is no adverse effect on the flow of magnetic flux between the armature portions of the first fixed counter plate and the first movable counter plate.
  • an electromagnetic contactor is an electromagnetic contactor using the above-described polarized electromagnet, and a contact mechanism is connected to the movable iron core part, 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 mounting space can be reduced, and a compact electromagnetic contactor that can be easily handled can be obtained, and the release operation of the contact mechanism can be performed while suppressing power consumption.
  • the charging operation can be performed reliably.
  • the magnetic flux leakage in the gap can be reduced, so that the required electromagnetic attractive force can be obtained even when a normal electromagnetic coil is used, and a large electromagnetic coil is not required. It is possible to reduce the size of the electromagnet and reduce the power consumption of the coil.
  • 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.
  • FIG. 1 shows the external appearance of an electromagnetic contactor 10 according to the present invention
  • FIG. 3 shows the internal structure of the electromagnetic contactor 10.
  • the electromagnetic contactor 10 is housed in the first case 11, the polar 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 first case 11.
  • a return spring 15 that applies a spring urging force to the movable iron core 27 of the polarized electromagnet 12 and the movable holder 16 of the contact mechanism 14 in the releasing direction (left direction in FIG. 3).
  • 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, as shown in FIG. 3, a plurality of pairs of fixed contacts 18 are fixed to the second case 13, and fixed contacts 19 are provided at the ends of the fixed contacts 18. Further, the movable holder 16 is disposed in the second case 13 so as to be movable in the left-right direction in FIG. 3, 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, and a movable iron core portion 27 disposed in the first case 11.
  • the movable iron core portion 27 is composed of a movable iron core rod 28, a first movable counter plate 29, and a second movable counter plate 30.
  • the components of the polarized electromagnet 12 will be described with reference to FIG. To do.
  • 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 includes a fixed side portion 35, a fixed bottom portion 36 that is bent orthogonally from one end in the longitudinal direction of the fixed side portion 35, and a fixed bottom portion that extends from the other end in the longitudinal direction of the fixed side portion 35.
  • the plate member On the side where 36 extends, the plate member is provided with a fixed armature portion 37 bent at an angle smaller than 90 ° with respect to the extending direction.
  • the fixed iron core portions 24 are configured so that the fixed bottom portion 36 is brought into contact with the bottom wall 11a of the first case 11 and a part of the fixed side portion 35 is engaged with the side wall 11b of the first case 11. It is installed inside.
  • the spool 23 is inserted in the direction in which the fixed side portion 35 of the fixed core portion 24 extends in the left-right direction with the permanent magnet 26 in contact with the inward surface of the fixed side portion 35 and the insertion of the electromagnetic coil 32. It arrange
  • a movable space is provided between the one end of the spool 23 and the bottom wall 11 a of the first case 11 so that the second movable counter plate 30 of the movable iron core 27 can move in the left-right direction.
  • the movable iron core 28 of the movable iron core portion 27 is slidably inserted into the insertion hole 31 of the electromagnetic coil 32.
  • a flat plate-shaped second movable counter plate 30 positioned in the movable space is fixed to one end of the movable core rod 28, and a first movable counter plate 29 is fixed to the other end of the movable core rod 28.
  • the first movable counter plate 29 is formed by bending a movable orthogonal portion 38 orthogonally fixed to the other end of the movable iron core rod 28, and bending from both ends of the movable orthogonal portion 38, and fixing the pair of fixed iron core portions 24. It is composed of a pair of movable armature portions 39 facing the armature portion 37 in parallel.
  • the movable armature portion 39 of the first movable counter plate 29 and the fixed armature portion 37 of the fixed iron core portion 24 extend obliquely with respect to the movable direction of the movable iron core portion 27. They are facing each other in parallel.
  • the central portion of the first movable counter plate 29 (movable orthogonal portion 38) of the movable iron core portion 27 is connected to the movable holder 16 of the contact mechanism 14 via a connecting member 40, and the movable iron core portion 27 and the movable holder 16 is adapted to move synchronously in the left-right direction.
  • the return spring 15 is disposed between the bottom wall 11a of the first case 11 and the second movable counter plate 30 of the movable core portion 27, and is released from the movable core portion 27 and the movable holder 16 (FIG. 3). The spring urging force is applied in the left direction).
  • the fixed side plate of the present invention corresponds to the fixed side portion 5
  • the second fixed counter plate of the present invention corresponds to the fixed bottom portion 36
  • the armature portion of the first fixed counter plate of the present invention is the fixed armature portion 37.
  • the armature portion of the first movable counter plate of the present invention corresponds to the movable armature portion 39
  • the gear gap of the present invention corresponds to the armature surface gap A2.
  • FIG. 3 shows the electromagnetic contactor 10 in a released state.
  • the electromagnetic coil 32 is in a non-excited state.
  • the magnetic flux of the permanent magnet 26 circulates in the normal path of the magnetic pole plate 25, the second movable counter plate 30 of the movable core portion 27, the fixed bottom portion 36 of the fixed core portion 24, the fixed side portion 35, and the permanent magnet 26.
  • the attraction force between the end plate portion 33 of the magnetic pole plate 25 and the second movable counter plate 30 of the movable iron core portion 27 is increased.
  • the second movable counter plate 30 of the movable iron core portion 27 moves to the left side of FIG. 3 by the return force of the return spring 15 and the attractive force of the permanent magnet 26, and approaches the end plate portion 33 of the magnetic pole plate 25. In this way, it is attracted to the end of the spool 23.
  • the entire movable iron core 27 also moves to the left in FIG. 3, and the movable holder 16 of the contact mechanism 14 connected to the first movable counter plate 29 via the connecting member 40.
  • 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. 4 shows the electromagnetic contactor 10 in the input state.
  • the electromagnetic coil 32 In the electromagnetic contactor 10 in the charged state, the electromagnetic coil 32 is in an excited state.
  • the magnetic flux of the electromagnetic coil 32 is changed so that the fixed side portion 35, the fixed armature portion 37 of the fixed iron core portion 24, the movable armature portion 39 of the first movable counter plate 29, the movable orthogonal portion 38, the movable iron core rod 28, 2
  • the movable armature plate 30, the magnetic pole plate 25, the permanent magnet 26, and the stationary armature portion 24 of the stationary iron core portion 24 are circulated in the normal path to move the stationary armature portion 37 of the stationary iron core portion 24 and the first movable opposing plate 29.
  • An attractive force (hereinafter referred to as an electromagnetic attractive force) is generated between the armature portion 39 and the armature portion 39.
  • the electromagnetic attraction force of the electromagnetic coil 32 is based on the attraction force generated by the permanent magnet 26 between the end plate portion 33 of the magnetic pole plate 25 and the second movable counter plate 30 of the movable iron core portion 27 and the spring force of the return spring 15.
  • the first movable counter plate 29 of the movable core portion 27 moves to the right side in FIG. 4 and is attracted to the fixed armature portion 37 of the fixed core portion 24.
  • the movable holder 16 of the contact mechanism 14 together with the first movable counter plate 29 also moves to the right side of FIG. Thereby, the movable contact 20 provided in the movable holder 16 contacts the fixed contact 19 provided in the 2nd case 13, and the insertion state of the electromagnetic contactor 10 is hold
  • FIG. 5 compares the main part of the conventional polarized electromagnet shown in FIG. 6 and the polarized electromagnet 12 of the present embodiment, and the operational effects of the present embodiment will be described based on FIG. To do.
  • the conventional polarized electromagnet shown in FIG. 5A the second arm 5c of the movable iron core portion 5 and the end plate portion 2b of the fixed iron core portion 2 face each other in parallel while being orthogonal to the movable direction of the movable iron core portion 5. Therefore, the contact surface gap A1 between the other end plate portion 2b and the second arm 5c has the same large dimension as the displacement amount (H) of the movable core portion 5.
  • the movable armature portion 39 of the movable iron core portion 27 and the fixed armature portion 37 of the fixed iron core portion 24 are the same as those of the movable iron core portion 27. Since they are opposed to each other in a state of extending obliquely with respect to the movable direction, even if the displacement amount of the movable iron core portion 27 is set to the same dimension H as that of the conventional polarized electromagnet, the movable armature portion 39 And the contact surface gap A2 between the fixed contact portions 37 is smaller than the contact surface gap A1 of the conventional device (A2 ⁇ A1).
  • the armature surface gap A2 between the movable armature portion 39 and the fixed armature portion 37 becomes a small value as in the present embodiment, the movable armature from the fixed armature portion 37 when the electromagnetic coil 32 is in an excited state. Since the leakage of the magnetic flux flowing through the portion 39 is reduced, it is possible to prevent the electromagnetic attraction force of the electromagnetic coil 32 from being lowered. Therefore, in the present embodiment, since the magnetic flux leakage of the armature surface gap A2 is reduced, the required electromagnetic attraction force can be obtained even when the normal electromagnetic coil 32 is used. Therefore, it is possible to reduce the size of the polarized electromagnet 12 and to reduce the coil power consumption.
  • the permanent magnet 26 of the polarized electromagnet 12 is arranged close to the fixed armature portion 37 while being in contact with the inner side of the fixed side portion 35 of the fixed iron core portion 24. 26, the magnetic flux of the permanent magnet 26 is fixed to the fixed armature portion 37 and the movable armature when the electromagnetic coil 32 is excited. The flow of magnetic flux between the armature portions 39 is not adversely affected.
  • the electromagnetic contactor 10 provided with the polarized electromagnet 12 can also reduce the mounting space, can be a compact device that is easy to handle, and can release the contact mechanism 14 while reducing power consumption.
  • the charging operation can be performed reliably.
  • the movable armature portion is bent by bending the edges of the first movable counter plate 29 and the fixed core portion 24 so as to face each other in parallel with the movable core portion 27 extending obliquely with respect to the movable direction. It is possible to easily obtain a structure in which the displacement H of the movable iron core is set to a desired value and the armature surface gap A2 is reduced simply by forming the armature 39 and the fixed armature portion 37. 12 manufacturing costs can be reduced.
  • the polarized electromagnet and the electromagnetic contactor according to the present invention are useful for reducing the size and power consumption while satisfying the required electromagnetic attraction force of the electromagnetic coil.
  • Electromagnetic contactor 11 ... 1st case, 11a ... Bottom wall, 11b ... Side wall, 12 ... Polarized electromagnet, 13 ... 2nd case, 15 ... Return spring, 14 ... Contact mechanism, 16 ... Movable holder, 17 ... Movable contact, 18 ... stationary contact, 19 ... fixed contact, 20 ... movable contact, 21 ... contact spring, 22 ... arc extinguishing cover, 23 ... spool, 24 ... fixed iron core, 25 ... magnetic pole plate, 26 ... permanent magnet , 27 ... movable iron core part, 28 ... movable iron core bar, 29 ... first movable counter plate, 30 ...
  • second movable counter plate 31 ... insertion hole, 32 ... electromagnetic coil, 33 ... end plate part, 34 ... side plate part, 35 ... fixed side part, 36 ... fixed bottom part, 37 ... fixed armature part, 38 ... movable orthogonal part, 39 ... movable armature part, 40 ... coupling member, A2 ... armature surface gap

Abstract

A movable iron core part (27) comprises a first movable opposing plate (29) and a second movable opposing plate (30) affixed respectively to the two ends of a movable iron core rod (28) inserted through an insertion hole (31) in an electromagnetic coil (32). In a fixed iron core part (24), a first fixed opposing plate (36) opposes the first movable opposing plate at a separation therefrom, a second fixed opposing plate (37) opposes the second movable opposing plate at a separation therefrom, and the first and second fixed opposing plates are coupled by a fixed side plate (35) that extends around the outside of the electromagnetic coil. When the electromagnetic coil is energized, creating an electromagnetic attractive force in the gap between the first fixed opposing plate and the first movable opposing plate, said force opposes a spring force from a return spring (15) and an attractive force from a permanent magnet (26), and the first movable opposing plate moves towards the first fixed opposing plate. An armature section (37) of the first fixed opposing plate and an armature section (39) of the first movable opposing plate extend diagonally with respect to the movement direction of the movable iron core part and are parallel to each other.

Description

有極電磁石及び電磁接触器Polarized electromagnet and electromagnetic contactor
　本発明は、永久磁石と電磁コイルとを備えた有極電磁石及びこの有極電磁石を備えた電磁接触器に関する。 The present invention relates to a polarized electromagnet including a permanent magnet and an electromagnetic coil, and an electromagnetic contactor including the polarized electromagnet.
　電磁接触器に組み込まれる有極電磁石として、例えば特許文献１のものが知られている。この有極電磁石は、図６に示すように、円筒形状の電磁コイル１と、一対の固定鉄心部２と、永久磁石３と、一対の磁極板４と、可動鉄心部５とを備えている。
　固定鉄心部２は、一方の端板部２ａを電磁コイル１の一端に近接させ、他方の端板部２ｂを電磁コイル１の他端に離間して対向させ、一方及び他方の端板部２ａ，２ｂの間に延在する側板部２ｃを電磁コイル１の外周部に近接させるように配置した略Ｕ字形状の部材である。永久磁石３は、固定鉄心部２の側板部２ｃの外側に配置されている。磁極板４は、側板部４ａを永久磁石３の外側に配置し、端板部４ｂを固定鉄心部２の一方の端板部２ａに離間して対向させた略Ｌ字形状の部材である。可動鉄心部５は、電磁コイル１に挿通した鉄心棒５ａと、鉄心棒５ａの一端に固定され、固定鉄心部２の一方の端板部２ａ及び磁極板４の側板部４ｂとの間に位置する第１アーム５ｂと、鉄心棒５ａの他端に固定され、電磁コイル１の他端及び固定鉄心部２の他方の端板部２ｂの間に位置する第２アーム５ｃとを備えており、この可動鉄心部５は、図示しない復帰ばねにより図６の右方向に付勢されている。 As a polarized electromagnet incorporated in an electromagnetic contactor, for example, one disclosed in Patent Document 1 is known. As shown in FIG. 6, 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).
　ここで、上述した可動鉄心部５の第２アーム５ｃは、鉄心棒５ａの軸線に直交する方向に延在した平板部材であり、この第２アーム５ｃに、固定鉄心部２の平坦形状の他方の端板部２ｂが平行に対面している。これにより、第２アーム５ｃ及び他方の端板部２ｂは、可動鉄心部５の可動方向（図６の矢印で示す方向）に直交しながら平行に対向している。
　そして、電磁コイル１が非励磁状態のときには、永久磁石３の磁束が、磁極板４、可動鉄心部５の第１アーム５ｂ、鉄心棒５ａ、固定鉄心部２の一方の端板部２ａ、側板部２ｃ、永久磁石３の順路で循環することで、磁極板４の端板部４ｂと可動鉄心部５の第１アーム５ｂとの間の吸引力が強くなり、可動鉄心部５の第１アーム５ｂが、復帰ばねの復帰力と永久磁石３の吸引力とにより、磁極板４の端板部４ｂに吸着して釈放状態が保持される。 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.
　また、電磁コイル１が励磁状態のときには、電磁コイル１の磁束が、固定鉄心部２の側板部２ｃ、他方の端板部２ｂ、可動鉄心部５の第２アーム５ｃ、鉄心棒５ａ、固定鉄心部２の一方の端板部２ａ、側板部４ａの順路で循環することで、固定鉄心部２の側板部２ｃと可動鉄心部５の第２アーム５ｃとの間に吸引力（以下、電磁吸引力と称する）が発生し、この電磁吸引力が、磁極板４の端板部４ｂと可動鉄心部５の第１アーム５ｂとの間の永久磁石３で発生する吸引力より大きくなると、可動鉄心部５が図１の左方向に変位し、固定鉄心部２の他方の端板部２ｂに可動鉄心部５の第２アーム５が吸着することで、投入状態が保持されるようになっている。 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 core portion 2, the other end plate portion 2b, the second arm 5c of the movable core portion 5, the iron core rod 5a, and the fixed iron core. By circulating in the forward path of one end plate portion 2a and side plate portion 4a of the portion 2, a suction force (hereinafter referred to as electromagnetic suction) is formed between the side plate portion 2c of the fixed core portion 2 and the second arm 5c of the movable core portion 5. If 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 is displaced 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. .
特開２００７－２０７７７７号公報JP 2007-207777 A
　ところで、上記従来の有極電磁石は、第２アーム５ｃ及び他方の端板部２ｂが可動鉄心部５の可動方向に直交しながら平行に対向しているので、他方の端板部２ｂ及び第２アーム５ｃの間の接極面ギャップＡ１は、可動鉄心部５が変位する量と同一の大きな寸法となる。
　このように接極面ギャップＡ１が大きいと、電磁コイル１が励磁状態のときに、他方の端板部２ｂから第２アーム５ｃに流れる磁束の漏れが発生しやすく、電磁コイル１の電磁吸引力が低下するおそれがある。この磁束漏れによる電磁吸引力の低下分を補填するためには大型の電磁コイル１が必要となるが、軸方向寸法Ｌ１、径方向寸法Ｄ１が増大した大型の電磁コイル１を使用すると、有極電磁石の小型化、消費電力の面で問題がある。
　そこで、本発明は、要求される電磁コイルの電磁吸引力を満足しつつ小型化、低消費電力化を図ることができる有極電磁石及び電磁接触器を提供することを目的としている。 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 contact surface gap A1 between the arms 5c has the same large dimension as the amount by which the movable iron core 5 is displaced.
When the contact surface gap A1 is large as described above, 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 increased. May decrease. 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, an object of the present invention is to provide a polarized electromagnet and an electromagnetic contactor that can be reduced in size and power consumption while satisfying the required electromagnetic attractive force of an electromagnetic coil.
　上記目的を達成するために、本発明の一の実施形態に係る有極電磁石は、円筒状に巻装された電磁コイルの挿通穴に可動鉄心棒を挿通し、前記電磁コイルの一方の端面から突出した前記可動鉄心棒の一端に第１可動対向板を固定し、前記電磁コイルの他方の端面から突出した前記可動鉄心棒の他端に第２可動対向板を固定して可動鉄心部を配置し、前記第１可動対向板に離間して第１固定対向板が対向し、前記第２可動対向板に離間して第２固定対向板が対向し、これら第１及び第２固定対向板を連結する固定側板を前記電磁コイルの外周に沿って延在させて固定鉄心部を配置し、前記電磁コイルの外周と前記固定側板との間に永久磁石を配置し、前記電磁コイルを励磁して前記第１固定対向板及び前記第１可動対向板の間のギャップに電磁吸引力が発生すると、復帰ばねのばね力及び前記永久磁石の吸引力に抗して、前記第１可動対向板が前記第１固定対向板に向けて変位して可動鉄心部が可動する有極電磁石において、前記第１固定対向板及び前記第１可動対向板に、前記可動鉄心部の可動方向に対して斜めに延在しながら互いに平行に対向する接極部を形成した。 In order to achieve the above object, a polarized electromagnet according to one embodiment of the present invention is configured to insert a movable iron core rod into an insertion hole of an electromagnetic coil wound in a cylindrical shape from one end face of the electromagnetic coil. The first movable counter plate is fixed to one end of the protruding movable iron core rod, and the second movable counter plate is fixed to the other end of the movable iron core rod protruding from the other end surface of the electromagnetic coil, and the movable iron core portion is disposed. The first fixed counter plate is spaced apart from the first movable counter plate, the second fixed counter plate is opposed to the second movable counter plate, and the first and second fixed counter plates are separated from each other. The fixed side plate to be connected is extended along the outer periphery of the electromagnetic coil, the fixed core portion is disposed, the permanent magnet is disposed between the outer periphery of the electromagnetic coil and the fixed side plate, and the electromagnetic coil is excited. The gap between the first fixed counter plate and the first movable counter plate is electrically charged. When the attraction force is generated, the first movable counter plate is displaced toward the first fixed counter plate against the spring force of the return spring and the attraction force of the permanent magnet, so that the movable iron core moves. In the electromagnet, the first fixed facing plate and the first movable facing plate are formed with armature portions facing each other in parallel while extending obliquely with respect to the moving direction of the movable core portion.
　従来の有極電磁石は、電磁コイルの励磁により電磁吸引力が発生する固定対向板及び可動対向板が可動鉄心部の可動方向に直交しながら平行に対向しているので、固定対向板及び可動対向板の間のギャップは、可動鉄心部の変位量と同一の大きな寸法となる。
　しかし、本発明の一の実施形態に係る有極電磁石は、電磁コイルの励磁により電磁吸引力が発生する第１固定対向板及び第１可動対向板には、可動鉄心部の可動方向に対して斜めに延在しながら互いに平行に対向する接極部が形成されており、可動鉄心部の変位量を、従来の有極電磁石と同一寸法に設定しても、第１固定対向板及び第１可動対向板に設けた接極部の間のギャップが、従来装置のギャップより小さな値となる。このように、本発明では、第１固定対向板及び第１可動対向板に設けた接極部の間のギャップが小さな値になるので、電磁コイルが励磁状態のときに、第１固定対向板及び第１可動対向板に設けた接極部の間を流れる磁束の漏れが減少するので、電磁コイルの電磁吸引力の低下を防止することができる。したがって、本発明の一の実施形態に係る有極電磁石は、ギャップの磁束漏れが減少することで通常の電磁コイルを使用しても要求する電磁吸引力を得ることができ、大型の電磁コイルが不要となって有極電磁石の小型化及び低コイル消費電力化を図ることができる。 In the conventional polarized electromagnet, the fixed counter plate and the movable counter plate that are parallel to each other while being orthogonal to the moving direction of the movable iron core are opposed to the fixed counter plate and the movable counter plate that generate an electromagnetic attraction force by the excitation of the electromagnetic coil. The gap between the plates has the same large dimension as the displacement of the movable iron core.
However, the polarized electromagnet according to one embodiment of the present invention has a first stationary counter plate and a first movable counter plate that generate an electromagnetic attraction force by excitation of the electromagnetic coil with respect to the movable direction of the movable iron core. Even though the armature portions that extend obliquely and face each other in parallel are formed, even if the displacement amount of the movable iron core portion is set to the same dimension as that of the conventional polarized electromagnet, the first fixed opposing plate and the first The gap between the contact portions provided on the movable counter plate is smaller than the gap of the conventional device. As described above, in the present invention, since the gap between the contact portions provided on the first fixed counter plate and the first movable counter plate becomes a small value, when the electromagnetic coil is in the excited state, the first fixed counter plate And since the leakage of the magnetic flux which flows between the armature parts provided in the 1st movable counterplate reduces, the fall of the electromagnetic attraction force of an electromagnetic coil can be prevented. Therefore, the polarized electromagnet according to one embodiment of the present invention can obtain the required electromagnetic attraction force even when a normal electromagnetic coil is used because the magnetic flux leakage in the gap is reduced. This eliminates the need for miniaturization of the polarized electromagnet and low power consumption of the coil.
　また、本発明の一の実施形態に係る有極電磁石は、前記第１固定対向板の前記接極部が
、前記固定側板から前記電磁コイルの前記挿通穴に向けて斜めに折曲された部位であり、前記第１可動対向板の前記接極部は、前記第１固定対向板の前記接極部に平行に対向するように、前記第１可動対向板の縁部を折曲した部位である。
　本発明の一の実施形態に係る有極電磁石によると、第１固定対向板の接極部及び第１可動対向板の接極部は、板材を折曲した部位であり、可動鉄心部の変位量と比較してギャップを小さくする構造を容易に得ることができるので、有極電磁石の製造コストの低減化を図ることができる。 In the polarized electromagnet according to one embodiment of the present invention, a portion where the armature portion of the first fixed counter plate is obliquely bent from the fixed side plate toward the insertion hole of the electromagnetic coil. And the armature portion of the first movable counter plate is a portion where the edge of the first movable counter plate is bent so as to face the armature portion of the first fixed counter plate in parallel. is there.
According to the polarized electromagnet according to one embodiment of the present invention, the armature portion of the first fixed facing plate and the armature portion of the first movable facing plate are bent portions of the plate material, and the displacement of the movable iron core portion Since a structure in which the gap is made smaller than the amount can be easily obtained, the manufacturing cost of the polarized electromagnet can be reduced.
　また、本発明の一の実施形態に係る有極電磁石は、前記第１固定対向板の前記接極部が、前記電磁コイルの外周と前記固定側板との間に配置されている前記永久磁石から離間する方向に向かって斜めに折曲されている。
　本発明の一の実施形態に係る有極電磁石によると、第１固定対向板の前記接極部が永久磁石から離間して配置されているので、永久磁石の磁束が、電磁コイルの励磁状態における第１固定対向板及び第１可動対向板の接極部の間の磁束の流れに悪影響を与えることがない。 Moreover, the polarized electromagnet according to one embodiment of the present invention is the above-described permanent magnet in which the armature portion of the first fixed counter plate is disposed between the outer periphery of the electromagnetic coil and the fixed side plate. It is bent obliquely in the direction of separation.
According to the polarized electromagnet according to one embodiment of the present invention, the magnetic pole of the permanent magnet is in an excited state of the electromagnetic coil because the armature portion of the first fixed counter plate is arranged away from the permanent magnet. There is no adverse effect on the flow of magnetic flux between the armature portions of the first fixed counter plate and the first movable counter plate.
　さらに、本発明の一の実施形態に係る電磁接触器は、上述した有極電磁石を使用した電磁接触器であり、前記可動鉄心部に接点機構を連結し、前記電磁コイルの励磁、非励磁による前記可動鉄心部の可動により前記接点機構の可動接点及び固定接点の開閉動作を行なうようにした。
　本発明の一の実施形態に係る電磁接触器によると、取付けスペースを小さくすることができ、取り扱いも容易なコンパクトな電磁接触器とすることができるとともに、消費電力を抑えながら接点機構の釈放動作及び投入動作を確実に行なうことができる。 Further, an electromagnetic contactor according to an embodiment of the present invention is an electromagnetic contactor using the above-described polarized electromagnet, and a contact mechanism is connected to the movable iron core part, 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.
According to the electromagnetic contactor according to an embodiment of the present invention, the mounting space can be reduced, and a compact electromagnetic contactor that can be easily handled can be obtained, and the release operation of the contact mechanism can be performed while suppressing power consumption. In addition, the charging operation can be performed reliably.
　本発明に係る有極電磁石によると、ギャップの磁束漏れが減少することで通常の電磁コイルを使用しても要求する電磁吸引力を得ることができ、大型の電磁コイルが不要となって有極電磁石の小型化及び低コイル消費電力化を図ることができる。
　また、本発明に係る電磁接触器によると、取付けスペースを小さくすることができ、取り扱いも容易なコンパクトな電磁接触器とすることができるとともに、消費電力を抑えながら接点機構の釈放動作及び投入動作を確実に行なうことができる。 According to the polarized electromagnet according to the present invention, the magnetic flux leakage in the gap can be reduced, so that the required electromagnetic attractive force can be obtained even when a normal electromagnetic coil is used, and a large electromagnetic coil is not required. It is possible to reduce the size of the electromagnet and reduce the power consumption of the coil.
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.
本発明に係る電磁接触器の外観を示す斜視図である。It is a perspective view which shows the external appearance of the electromagnetic contactor which concerns on this invention. 本発明に係る電磁接触器を構成する部品を示す展開斜視図である。It is an expansion | deployment perspective view which shows the components which comprise the electromagnetic contactor which concerns on this invention. 本発明に係る電磁接触器の釈放状態を示す断面図である。It is sectional drawing which shows the release state of the magnetic contactor which concerns on this invention. 本発明に係る電磁接触器の投入状態を示す断面図である。It is sectional drawing which shows the injection state of the magnetic contactor which concerns on this invention. 可動鉄心部の変位量を同一とした場合の従来の有極電磁石と本発明の有極電磁石のギャップ変化を説明した図である。It is a figure explaining the gap change of the conventional polarized electromagnet when the displacement amount of a movable iron core part is made the same, and the polarized electromagnet of this invention. 従来の有極電磁石を示す断面図である。It is sectional drawing which shows the conventional polarized electromagnet.
　以下、本発明を実施するための形態（以下、実施形態という。）を、図面を参照しながら詳細に説明する。
　図１は本発明に係る電磁接触器１０の外観を示し、図３は電磁接触器１０の内部構造を示すものである。この電磁接触器１０は、第１ケース１１に内装された有極電磁石１２と、第１ケース１１に一体に連結した第２ケース１３に内装された接点機構１４と、第１ケース１１内に収納され、有極電磁石１２の可動鉄心部２７及び接点機構１４の可動ホルダ１６に対して釈放方向（図３の左方向）にばね付勢力を付与する復帰ばね１５とを備えている。 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.
FIG. 1 shows the external appearance of an electromagnetic contactor 10 according to the present invention, and FIG. 3 shows the internal structure of the electromagnetic contactor 10. The electromagnetic contactor 10 is housed in the first case 11, the polar 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 first case 11. And a return spring 15 that applies a spring urging force to the movable iron core 27 of the polarized electromagnet 12 and the movable holder 16 of the contact mechanism 14 in the releasing direction (left direction in FIG. 3).
　接点機構１４は、図２に示すように、第２ケース１３内に配置された可動ホルダ１６、複数の可動接触子１７及び複数対の固定接触子１８と、第２ケース１３の開口部に装着した消弧カバー２２とを備えている。すなわち、図３に示すように、第２ケース１３には複数対の固定接触子１８が固定されており、各固定接触子１８の端部に固定接点１９が設けられている。また、可動ホルダ１６は、第２ケース１３内に図３の左右方向に移動自在に配置されており、この可動ホルダ１６は、複数の可動接触子１７を保持している。各可動接触子１７は、複数対の固定接触子１８の固定接点１９に対向する位置に可動接点２０が設けられているとともに、可動接点２０を固定接点１９に押し付ける方向に可動接触子１７に対してばね付勢力を付与する接触ばね２１が設けられている。 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, as shown in FIG. 3, a plurality of pairs of fixed contacts 18 are fixed to the second case 13, and fixed contacts 19 are provided at the ends of the fixed contacts 18. Further, the movable holder 16 is disposed in the second case 13 so as to be movable in the left-right direction in FIG. 3, 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.
　有極電磁石１２は、図２に示すように、第１ケース１１内に配置されたスプール２３、一対の固定鉄心部２４、一対の磁極板２５、一対の永久磁石２６、可動鉄心部２７を備えており、可動鉄心部２７は、可動鉄心棒２８、第１可動対向板２９及び第２可動対向板３０で構成されており、これら有極電磁石１２の構成部材を、図３を参照して説明する。
　スプール２３は、挿通穴３１を形成した円筒形状の電磁コイル３２を備えている。 As shown in FIG. 2, 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, and a movable iron core portion 27 disposed in the first case 11. The movable iron core portion 27 is composed of a movable iron core rod 28, a first movable counter plate 29, and a second movable counter plate 30. The components of the polarized electromagnet 12 will be described with reference to FIG. To do.
The spool 23 includes a cylindrical electromagnetic coil 32 in which an insertion hole 31 is formed.
　一対の磁極板２５は、Ｌ字状に折曲した端板部３３及び側板部３４を備えた板部材であり、端板部３３が電磁コイル３２の一端に近接するようにスプール２３に固定され、側板部３４は電磁コイル３２の外周に沿って配置されている。これら一対の磁極板２５の側板部３４の外方を向く面には、矩形板状の永久磁石２６が固定されている。
　一対の固定鉄心部２４は、固定側部３５と、この固定側部３５の長手方向の一端から直交して折曲された固定底部３６と、固定側部３５の長手方向の他端から固定底部３６が延在する側に、その延在する方向に対して９０°より小さな角度で折曲された固定接極部３７を備えた板部材である。 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 includes a fixed side portion 35, a fixed bottom portion 36 that is bent orthogonally from one end in the longitudinal direction of the fixed side portion 35, and a fixed bottom portion that extends from the other end in the longitudinal direction of the fixed side portion 35. On the side where 36 extends, the plate member is provided with a fixed armature portion 37 bent at an angle smaller than 90 ° with respect to the extending direction.
　これら固定鉄心部２４は、固定底部３６を第１ケース１１の底壁１１ａに当接させ、固定側部３５の一部を第１ケース１１の側壁１１ｂに係合させた状態で第１ケース１１の内部に装着されている。そして、スプール２３は、固定側部３５の内方を向く面に永久磁石２６を当接した状態で、固定鉄心部２４の固定側部３５が左右方向に延在する方向と電磁コイル３２の挿通穴３１の軸線とが平行となるように、一対の固定鉄心部２４の内側に配置されている。ここで、スプール２３の一端と第１ケース１１の底壁１１ａとの間には、可動鉄心部２７の第２可動対向板３０を左右方向に可動自在とする可動空間が設けられている。 The fixed iron core portions 24 are configured so that the fixed bottom portion 36 is brought into contact with the bottom wall 11a of the first case 11 and a part of the fixed side portion 35 is engaged with the side wall 11b of the first case 11. It is installed inside. The spool 23 is inserted in the direction in which the fixed side portion 35 of the fixed core portion 24 extends in the left-right direction with the permanent magnet 26 in contact with the inward surface of the fixed side portion 35 and the insertion of the electromagnetic coil 32. It arrange | positions inside a pair of fixed iron core part 24 so that the axis line of the hole 31 may become parallel. Here, a movable space is provided between the one end of the spool 23 and the bottom wall 11 a of the first case 11 so that the second movable counter plate 30 of the movable iron core 27 can move in the left-right direction.
　可動鉄心部２７の可動鉄心棒２８は、電磁コイル３２の挿通穴３１に摺動自在に挿通されている。
　可動鉄心棒２８の一端には、前記可動空間に位置する平板形状の第２可動対向板３０が固定されているとともに、可動鉄心棒２８の他端には、第１可動対向板２９が固定されている。
　第１可動対向板２９は、可動鉄心棒２８の他端に直交して固定された可動直交部３８と、可動直交部３８の両端から折曲して形成され、一対の固定鉄心部２４の固定接極部３７に平行に対向している一対の可動接極部３９とで構成されている。
　これにより、本実施形態は、第１可動対向板２９の可動接極部３９及び固定鉄心部２４の固定接極部３７が、可動鉄心部２７の可動方向に対して斜めに延在した状態で互いに平行に対向している。 The movable iron core 28 of the movable iron core portion 27 is slidably inserted into the insertion hole 31 of the electromagnetic coil 32.
A flat plate-shaped second movable counter plate 30 positioned in the movable space is fixed to one end of the movable core rod 28, and a first movable counter plate 29 is fixed to the other end of the movable core rod 28. ing.
The first movable counter plate 29 is formed by bending a movable orthogonal portion 38 orthogonally fixed to the other end of the movable iron core rod 28, and bending from both ends of the movable orthogonal portion 38, and fixing the pair of fixed iron core portions 24. It is composed of a pair of movable armature portions 39 facing the armature portion 37 in parallel.
Accordingly, in the present embodiment, the movable armature portion 39 of the first movable counter plate 29 and the fixed armature portion 37 of the fixed iron core portion 24 extend obliquely with respect to the movable direction of the movable iron core portion 27. They are facing each other in parallel.
　また、可動鉄心部２７の第１可動対向板２９（可動直交部３８）の中央部は、連結部材４０を介して接点機構１４の可動ホルダ１６に連結されており、可動鉄心部２７及び可動ホルダ１６は、左右方向に同期移動するようになっている。
　そして、復帰ばね１５は、第１ケース１１の底壁１１ａと可動鉄心部２７の第２可動対向板３０との間に配置され、可動鉄心部２７及び可動ホルダ１６に対して釈放方向（図３の左方向）にばね付勢力を付与している。
　なお、本発明の固定側板が固定側部５に対応し、本発明の第２固定対向板が固定底部３６に対応し、本発明の第１固定対向板の接極部が固定接極部３７に対応し、本発明の第１可動対向板の接極部が可動接極部３９に対応し、本発明のギヤップが接極面ギャップＡ２に対応している。 The central portion of the first movable counter plate 29 (movable orthogonal portion 38) of the movable iron core portion 27 is connected to the movable holder 16 of the contact mechanism 14 via a connecting member 40, and the movable iron core portion 27 and the movable holder 16 is adapted to move synchronously in the left-right direction.
The return spring 15 is disposed between the bottom wall 11a of the first case 11 and the second movable counter plate 30 of the movable core portion 27, and is released from the movable core portion 27 and the movable holder 16 (FIG. 3). The spring urging force is applied in the left direction).
The fixed side plate of the present invention corresponds to the fixed side portion 5, the second fixed counter plate of the present invention corresponds to the fixed bottom portion 36, and the armature portion of the first fixed counter plate of the present invention is the fixed armature portion 37. The armature portion of the first movable counter plate of the present invention corresponds to the movable armature portion 39, and the gear gap of the present invention corresponds to the armature surface gap A2.
　次に、上記構成の電磁接触器１０の動作について、図３及び図４を参照して説明する。
　図３は、釈放状態の電磁接触器１０を示している。釈放状態の電磁接触器１０は、電磁コイル３２が非励磁状態となっている。このとき、永久磁石２６の磁束が、磁極板２５、可動鉄心部２７の第２可動対向板３０、固定鉄心部２４の固定底部３６、固定側部３５、永久磁石２６の順路で循環することで、磁極板２５の端板部３３と可動鉄心部２７の第２可動対向板３０との間の吸引力が強くなる。これにより、可動鉄心部２７の第２可動対向板３０は、復帰ばね１５の復帰力と永久磁石２６の吸引力により図３の左側に移動して、磁極板２５の端板部３３に近接するようにスプール２３の端部に吸着する。 Next, the operation of the electromagnetic contactor 10 having the above configuration will be described with reference to FIGS.
FIG. 3 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 normal path of the magnetic pole plate 25, the second movable counter plate 30 of the movable core portion 27, the fixed bottom portion 36 of the fixed core portion 24, the fixed side portion 35, and the permanent magnet 26. The attraction force between the end plate portion 33 of the magnetic pole plate 25 and the second movable counter plate 30 of the movable iron core portion 27 is increased. As a result, the second movable counter plate 30 of the movable iron core portion 27 moves to the left side of FIG. 3 by the return force of the return spring 15 and the attractive force of the permanent magnet 26, and approaches the end plate portion 33 of the magnetic pole plate 25. In this way, it is attracted to the end of the spool 23.
　そして、第２可動対向板３０の移動とともに、可動鉄心部２７全体も図３の左側に移動し、第１可動対向板２９と連結部材４０を介して連結している接点機構１４の可動ホルダ１６も、図３の左側に移動する。これにより、可動ホルダ１６に設けた可動接点２０が、第２ケース１３に設けた固定接点１９に対して離間した状態で位置し、電磁接触器１０の釈放状態が保持される。 As the second movable counter plate 30 moves, the entire movable iron core 27 also moves to the left in FIG. 3, and the movable holder 16 of the contact mechanism 14 connected to the first movable counter plate 29 via the connecting member 40. Move to the left 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.
　図４は、投入状態の電磁接触器１０を示している。投入状態の電磁接触器１０は、電磁コイル３２が励磁状態となっている。このとき、電磁コイル３２の磁束が、固定鉄心部２４の固定側部３５、固定接極部３７、第１可動対向板２９の可動接極部３９、可動直交部３８、可動鉄心棒２８、第２可動対向板３０、磁極板２５、永久磁石２６、固定鉄心部２４の固定側部３５の順路で循環することで、固定鉄心部２４の固定接極部３７と第１可動対向板２９の可動接極部３９との間に吸引力（以下、電磁吸引力と称する）が発生する。この電磁コイル３２の電磁吸引力が、磁極板２５の端板部３３と可動鉄心部２７の第２可動対向板３０との間の永久磁石２６で発生する吸引力及び復帰ばね１５のばね力より大きくなると、可動鉄心部２７の第１可動対向板２９は図４の右側に移動し、固定鉄心部２４の固定接極部３７に吸着する。
　そして、第１可動対向板２９とともに接点機構１４の可動ホルダ１６も、図４の右側に移動する。これにより、可動ホルダ１６に設けた可動接点２０が、第２ケース１３に設けた固定接点１９に接触し、電磁接触器１０の投入状態が保持される。 FIG. 4 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 changed so that the fixed side portion 35, the fixed armature portion 37 of the fixed iron core portion 24, the movable armature portion 39 of the first movable counter plate 29, the movable orthogonal portion 38, the movable iron core rod 28, 2 The movable armature plate 30, the magnetic pole plate 25, the permanent magnet 26, and the stationary armature portion 24 of the stationary iron core portion 24 are circulated in the normal path to move the stationary armature portion 37 of the stationary iron core portion 24 and the first movable opposing plate 29. An attractive force (hereinafter referred to as an electromagnetic attractive force) is generated between the armature portion 39 and the armature portion 39. The electromagnetic attraction force of the electromagnetic coil 32 is based on the attraction force generated by the permanent magnet 26 between the end plate portion 33 of the magnetic pole plate 25 and the second movable counter plate 30 of the movable iron core portion 27 and the spring force of the return spring 15. When it becomes larger, the first movable counter plate 29 of the movable core portion 27 moves to the right side in FIG. 4 and is attracted to the fixed armature portion 37 of the fixed core portion 24.
Then, the movable holder 16 of the contact mechanism 14 together with the first movable counter plate 29 also moves to the right side of FIG. Thereby, the movable contact 20 provided in the movable holder 16 contacts the fixed contact 19 provided in the 2nd case 13, and the insertion state of the electromagnetic contactor 10 is hold | maintained.
　次に、図５は、図６で示した従来の有極電磁石と本実施形態の有極電磁石１２の要部を比較したものであり、この図５に基づいて本実施形態の作用効果を説明する。
　図５（ａ）で示す従来の有極電磁石は、可動鉄心部５の第２アーム５ｃ及び固定鉄心部２の端板部２ｂが、可動鉄心部５の可動方向に直交しながら平行に対向しているので、他方の端板部２ｂ及び第２アーム５ｃの間の接極面ギャップＡ１は、可動鉄心部５の変位量（Ｈ）と同一の大きな寸法となる。 Next, FIG. 5 compares the main part of the conventional polarized electromagnet shown in FIG. 6 and the polarized electromagnet 12 of the present embodiment, and the operational effects of the present embodiment will be described based on FIG. To do.
In the conventional polarized electromagnet shown in FIG. 5A, the second arm 5c of the movable iron core portion 5 and the end plate portion 2b of the fixed iron core portion 2 face each other in parallel while being orthogonal to the movable direction of the movable iron core portion 5. Therefore, the contact surface gap A1 between the other end plate portion 2b and the second arm 5c has the same large dimension as the displacement amount (H) of the movable core portion 5.
　これに対して、図５（ｂ）で示す本実施形態の有極電磁石１２は、可動鉄心部２７の可動接極部３９及び固定鉄心部２４の固定接極部３７が、可動鉄心部２７の可動方向に対して斜めに延在した状態で互いに平行に対向しているので、可動鉄心部２７の変位量を、従来の有極電磁石と同一寸法Ｈに設定しても、可動接極部３９及び固定接極部３７の間の接極面ギャップＡ２は、従来装置の接極面ギャップＡ１より小さな値となる（Ａ２＜Ａ１）。 On the other hand, in the polarized electromagnet 12 of this embodiment shown in FIG. 5B, the movable armature portion 39 of the movable iron core portion 27 and the fixed armature portion 37 of the fixed iron core portion 24 are the same as those of the movable iron core portion 27. Since they are opposed to each other in a state of extending obliquely with respect to the movable direction, even if the displacement amount of the movable iron core portion 27 is set to the same dimension H as that of the conventional polarized electromagnet, the movable armature portion 39 And the contact surface gap A2 between the fixed contact portions 37 is smaller than the contact surface gap A1 of the conventional device (A2 <A1).
　本実施形態のように可動接極部３９及び固定接極部３７の間の接極面ギャップＡ２が小さな値になると、電磁コイル３２が励磁状態のときに、固定接極部３７から可動接極部３９に流れる磁束の漏れが減少するので、電磁コイル３２の電磁吸引力の低下を防止することができる。
　したがって、本実施形態は、接極面ギャップＡ２の磁束漏れが減少することで通常の電磁コイル３２を使用しても要求する電磁吸引力を得ることができるので、大型の電磁コイル３２が不要となり、有極電磁石１２の小型化及び低コイル消費電力化を図ることができる。 When the armature surface gap A2 between the movable armature portion 39 and the fixed armature portion 37 becomes a small value as in the present embodiment, the movable armature from the fixed armature portion 37 when the electromagnetic coil 32 is in an excited state. Since the leakage of the magnetic flux flowing through the portion 39 is reduced, it is possible to prevent the electromagnetic attraction force of the electromagnetic coil 32 from being lowered.
Therefore, in the present embodiment, since the magnetic flux leakage of the armature surface gap A2 is reduced, the required electromagnetic attraction force can be obtained even when the normal electromagnetic coil 32 is used. Therefore, it is possible to reduce the size of the polarized electromagnet 12 and to reduce the coil power consumption.
　また、有極電磁石１２の永久磁石２６は、固定鉄心部２４の固定側部３５の内側に当接しながら固定接極部３７に寄って配置されているが、固定接極部３７は、永久磁石２６から離間する方向に延在しつつ、その方向に対して９０°より小さな角度で折曲されているので、永久磁石２６の磁束が、電磁コイル３２の励磁状態における固定接極部３７及び可動接極部３９の間の磁束の流れに悪影響を与えることがない。 Further, the permanent magnet 26 of the polarized electromagnet 12 is arranged close to the fixed armature portion 37 while being in contact with the inner side of the fixed side portion 35 of the fixed iron core portion 24. 26, the magnetic flux of the permanent magnet 26 is fixed to the fixed armature portion 37 and the movable armature when the electromagnetic coil 32 is excited. The flow of magnetic flux between the armature portions 39 is not adversely affected.
　また、この有極電磁石１２を備えた電磁接触器１０も、取付けスペースを小さくすることができ、取り扱いも容易なコンパクトな装置とすることができるとともに、消費電力を抑えながら接点機構１４の釈放動作及び投入動作を確実に行なうことができる。
　さらに、可動鉄心部２７の可動方向に対して斜めに延在した状態で互いに平行に対向するように、第１可動対向板２９及び固定鉄心部２４の縁部を折曲して可動接極部３９及び固定接極部３７を形成するだけで、可動鉄心の変位量Ｈを所望の値に設定し、且つ、接極面ギャップＡ２を小さくする構造を容易に得ることができるので、有極電磁石１２の製造コストの低減化を図ることができる。 In addition, the electromagnetic contactor 10 provided with the polarized electromagnet 12 can also reduce the mounting space, can be a compact device that is easy to handle, and can release the contact mechanism 14 while reducing power consumption. In addition, the charging operation can be performed reliably.
Furthermore, the movable armature portion is bent by bending the edges of the first movable counter plate 29 and the fixed core portion 24 so as to face each other in parallel with the movable core portion 27 extending obliquely with respect to the movable direction. It is possible to easily obtain a structure in which the displacement H of the movable iron core is set to a desired value and the armature surface gap A2 is reduced simply by forming the armature 39 and the fixed armature portion 37. 12 manufacturing costs can be reduced.
　以上のように、本発明に係る有極電磁石及び電磁接触器は、要求される電磁コイルの電磁吸引力を満足しつつ小型化、低消費電力化を図るのに有用である。 As described above, the polarized electromagnet and the electromagnetic contactor according to the present invention are useful for reducing the size and power consumption while satisfying the required electromagnetic attraction force of the electromagnetic coil.
　　１０…電磁接触器、１１…第１ケース、１１ａ…底壁、１１ｂ…側壁、１２…有極電磁石、１３…第２ケース、１５…復帰ばね、１４…接点機構、１６…可動ホルダ、１７…可動接触子、１８…固定接触子、１９…固定接点、２０…可動接点、２１…接触ばね、２２…消弧カバー、２３…スプール、２４…固定鉄心部、２５…磁極板、２６…永久磁石、２７…可動鉄心部、２８…可動鉄心棒、２９…第１可動対向板、３０…第２可動対向板、３１…挿通穴、３２…電磁コイル、３３…端板部、３４…側板部、３５…固定側部、３６…固定底部、３７…固定接極部、３８…可動直交部、３９…可動接極部、４０…連結部材、Ａ２…接極面ギャップ DESCRIPTION OF SYMBOLS 10 ... Electromagnetic contactor, 11 ... 1st case, 11a ... Bottom wall, 11b ... Side wall, 12 ... Polarized electromagnet, 13 ... 2nd case, 15 ... Return spring, 14 ... Contact mechanism, 16 ... Movable holder, 17 ... Movable contact, 18 ... stationary contact, 19 ... fixed contact, 20 ... movable contact, 21 ... contact spring, 22 ... arc extinguishing cover, 23 ... spool, 24 ... fixed iron core, 25 ... magnetic pole plate, 26 ... permanent magnet , 27 ... movable iron core part, 28 ... movable iron core bar, 29 ... first movable counter plate, 30 ... second movable counter plate, 31 ... insertion hole, 32 ... electromagnetic coil, 33 ... end plate part, 34 ... side plate part, 35 ... fixed side part, 36 ... fixed bottom part, 37 ... fixed armature part, 38 ... movable orthogonal part, 39 ... movable armature part, 40 ... coupling member, A2 ... armature surface gap

Claims (4)

  1. 　円筒状に巻装された電磁コイルの挿通穴に可動鉄心棒を挿通し、前記電磁コイルの一方の端面から突出した前記可動鉄心棒の一端に第１可動対向板を固定し、前記電磁コイルの他方の端面から突出した前記可動鉄心棒の他端に第２可動対向板を固定して可動鉄心部を配置し、前記第１可動対向板に離間して第１固定対向板が対向し、前記第２可動対向板に離間して第２固定対向板が対向し、これら第１及び第２固定対向板を連結する固定側板を前記電磁コイルの外周に沿って延在させて固定鉄心部を配置し、前記電磁コイルの外周と前記固定側板との間に永久磁石を配置し、前記電磁コイルを励磁して前記第１固定対向板及び前記第１可動対向板の間のギャップに電磁吸引力が発生すると、復帰ばねのばね力及び前記永久磁石の吸引力に抗して、前記第１可動対向板が前記第１固定対向板に向けて変位して可動鉄心部が可動する有極電磁石において、
    　前記第１固定対向板及び前記第１可動対向板に、前記可動鉄心部の可動方向に対して斜めに延在しながら互いに平行に対向する接極部を形成したことを特徴とする有極電磁石。     A movable iron core is inserted into the insertion hole of the electromagnetic coil wound in a cylindrical shape, a first movable counter plate is fixed to one end of the movable iron core protruding from one end surface of the electromagnetic coil, and the electromagnetic coil A second movable counter plate is fixed to the other end of the movable iron core rod protruding from the other end surface, and a movable iron core portion is disposed, spaced apart from the first movable counter plate, the first fixed counter plate faces, A fixed iron core is disposed by extending a fixed side plate connecting the first and second fixed counter plates along the outer periphery of the electromagnetic coil so that the second fixed counter plate is opposed to the second movable counter plate. When a permanent magnet is disposed between the outer periphery of the electromagnetic coil and the fixed side plate, the electromagnetic coil is excited to generate an electromagnetic attractive force in the gap between the first fixed counter plate and the first movable counter plate. Resisting the spring force of the return spring and the attractive force of the permanent magnet In polarized electromagnet movable core portion is movable first movable counter plate is displaced toward the first fixed face plate,
    A poled electromagnet characterized in that the first fixed counter plate and the first movable counter plate are formed with armature portions facing each other in parallel while extending obliquely with respect to the movable direction of the movable core portion. .
  2. 　前記第１固定対向板の前記接極部は、前記固定側板から前記電磁コイルの前記挿通穴に向けて斜めに折曲された部位であり、
    　前記第１可動対向板の前記接極部は、前記第１固定対向板の前記接極部に平行に対向するように、前記第１可動対向板の縁部を折曲した部位であることを特徴とする請求項１記載の有極電磁石。     The armature portion of the first fixed facing plate is a portion bent obliquely from the fixed side plate toward the insertion hole of the electromagnetic coil,
    The armature portion of the first movable counter plate is a portion where the edge of the first movable counter plate is bent so as to face the armature portion of the first fixed counter plate in parallel. The polarized electromagnet according to claim 1, wherein:
  3. 　前記第１固定対向板の前記接極部は、前記電磁コイルの外周と前記固定側板との間に配置されている前記永久磁石から離間する方向に向かって斜めに折曲されていることを特徴とする請求項２記載の有極電磁石。 The armature portion of the first fixed facing plate is bent obliquely in a direction away from the permanent magnet disposed between the outer periphery of the electromagnetic coil and the fixed side plate. The polarized electromagnet according to claim 2.
  4. 　前記請求項１乃至３の何れか１項に記載の有極電磁石を備えた電磁接触器であって、
    　前記可動鉄心部に接点機構を連結し、前記電磁コイルの励磁、非励磁による前記可動鉄心部の可動により前記接点機構の可動接点及び固定接点の開閉動作を行なうようにしたことを特徴とする電磁接触器。     An electromagnetic contactor comprising the polarized electromagnet according to any one of claims 1 to 3,
    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.
PCT/JP2010/007382 2010-04-01 2010-12-20 Polar electromagnet and electromagnetic contact WO2011125142A1 (en)

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KR102518886B1 (en) * 2016-01-15 2023-04-06 엘에스일렉트릭(주) Electro-magnetic Contactor

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