KR101591637B1 - Electromagnetic contactor and assembly method thereof - Google Patents

Electromagnetic contactor and assembly method thereof Download PDF

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Publication number
KR101591637B1
KR101591637B1 KR1020157016568A KR20157016568A KR101591637B1 KR 101591637 B1 KR101591637 B1 KR 101591637B1 KR 1020157016568 A KR1020157016568 A KR 1020157016568A KR 20157016568 A KR20157016568 A KR 20157016568A KR 101591637 B1 KR101591637 B1 KR 101591637B1
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South Korea
Prior art keywords
case
coil
movable
engaging projection
iron core
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KR1020157016568A
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Korean (ko)
Inventor
유마 야마마츠
도모히코 다케모토
야스히사 햐쿠타
Original Assignee
미쓰비시덴키 가부시키가이샤
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Priority to KR1020157016568A priority Critical patent/KR101591637B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/44—Magnetic coils or windings

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)

Abstract

The electromagnetic contactor is composed of a movable contactor to which the movable contactor can be attached and which is mounted on the first movable iron plate 10a, a case which can mount the fixed contactor and which covers the contact carrier, 2, and a rear case connected to the case. The coil bobbin 9 has a first engaging protrusion on its upper surface, and the case has a case in which the abutting carrier is mounted on the first movable iron core 10a And a second engaging projection opposed to the first engaging projection with a clearance of a preset distance therebetween.

Description

[0001] Electromagnetic contactor and assembly method [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic contactor having a permanent magnet and a coil in combination, and a method of assembling the same.

The electromagnetic contactor disclosed in Patent Document 1 includes a free magnetic member in which a permanent magnet and a coil are combined, a movable contact carrier on which the movable contact is mounted, a stationary contact member which is brought into contact with and separated from the movable contact, A rear case for accommodating the magnetic pole electromagnets, and a case for covering the contact carrier and engaging with the rear case. The positive electromagnet includes a coil formed by winding a conductor wire, a coil bobbin around which the coil is wound, a movable iron core penetrating the coil bobbin in the axial direction, and a U-shaped fixed An iron core, a magnetic pole plate disposed opposite to the coil, and a permanent magnet provided on the fixed core. The movable iron core plate is provided with a movable contact carrier on which the movable contactor is mounted. The movable contactor is displaced by the same amount in accordance with the displacement amount of the movable core.

In the electromagnetic contactor disclosed in Patent Document 1, when the coil is not energized, the movable iron core is attracted to the magnetic pole plate by the magnetic force of the permanent magnet, so that the movable contact and the stationary contactor are kept separated do. When the coil is excited, a magnetic field for eliminating the magnetic field of the permanent magnet is generated between the movable core and the fixed core, so that the movable core is displaced toward the stationary fixed core, and the movable contact and the fixed contact are in contact with each other.

Patent Document 1: JP-A-2010-62079

The electromagnetic contactor is required to prevent foreign matter from entering into and remaining in the product from the viewpoints of malfunction due to insertion of foreign objects into the driving portion and reduction of contact life due to insertion of foreign objects between the contacts . Therefore, the electromagnetic contactor needs to be assembled in a case in which the opening is made as small as possible, and in order that the foreign matter does not remain in the case as much as possible.

However, Patent Document 1 does not disclose a procedure for assembling an electromagnetic contactor, which takes into consideration prevention of intrusion and residual of foreign matter.

In the electromagnetic contactor disclosed in Patent Document 1, when a movable contact provided with a movable contact is inserted into a case, and the movable electromagnet is lifted only by the case in the state that the electromotive electromagnet is mounted on the case, The contact carrier is lowered. When the movable contact carrier is lowered by the weight of the movable electromagnet, the movable contactor is displaced by more than the displacement amount of the contact carrier and comes into contact with the fixed contactor, so that the movable contactor is deformed.

In order to prevent deformation of the movable contact, the case and the electromotive electromagnet need to be put in at the same time. However, when the case and the electromagnet electromagnet are held with both hands, the working efficiency of the assembling work is lowered. Therefore, when the case is lifted, a case in which the movable contact and the fixed contact are not in contact with each other, and a case capable of lifting the entire structure excluding the rear case, and a structure for engaging the free magnetic electromagnet are required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an electromagnetic contactor having a structure in which a movable contactor and a fixed contactor are not in contact with each other, .

In order to solve the above-described problems and to achieve the object, the present invention is a coil bobbin including a coil formed by winding a conductor wire around a coil bobbin, a coil formed by winding a U (coil) extending from both ends of a side plate portion A pair of U-shaped fixed iron pieces each having a coil-like shape, one of the single plate portions being opposed to one end of the coil, the other single plate portion being spaced apart from the other end of the coil and facing the outer peripheral portion of the coil, A pair of permanent magnets arranged inside the side plate portion of the U-shaped fixed iron core, and a first movable iron plate for positioning the one end of the U-shaped fixed iron core on the outer side of one end of the iron core rod inserted and passed through the coil A movable electromagnet provided with a movable iron core provided with a second movable iron plate for positioning the other end of the iron bar between the other end of the coil and the other end plate of the U-shaped fixed iron core; and a movable contact Possible A movable case mounted on the first movable iron core; a case capable of mounting a fixed contact and covering the movable contact carrier; and a rear case connected to the case, the movable case receiving the movable electromagnet, And a first engaging protrusion on the upper surface of the first movable iron core plate, and the casing is provided with a second engaging projection for opposing the first engaging projection with a predetermined clearance, And a projection is provided.

The electromagnetic contactor according to the present invention exhibits the effect of lifting the entire structure except for the rear case without bringing the movable contact and the fixed contact into contact with each other by raising the case.

1 is a perspective view of an electromagnetic contactor according to an embodiment of the present invention;
2 is a cross-sectional view of an electromagnetic contactor according to an embodiment of the present invention.
3 is a cross-sectional view of a positive electromagnet of an electromagnetic contactor according to an embodiment.
4 is a perspective view of a levitation electromagnet of an electromagnetic contactor according to the embodiment;
5 is a perspective view of a contactable carrier of the electromagnetic contactor according to the embodiment;
6 is a perspective view of a case of the electromagnetic contactor according to the embodiment;
7 is a perspective view of a case of the electromagnetic contactor according to the embodiment;
8 is a cross-sectional view of a portion of the electromagnetic contactor except the rear case of the embodiment in a state in which the engaging portion of the contact carrier is passed through the notch provided in the movable iron core.
9 is a cross-sectional view of a portion of the electromagnetic contactor except the rear case of the embodiment in a state in which the case with the contact carrier inserted therein is slid in the + z direction.
10 is a cross-sectional view of a portion of the electromagnetic contactor according to the embodiment except the rear case in the assembled state;
11 is a partially enlarged view of the electromagnetic contactor according to the embodiment;
12 is a partially enlarged view of the electromagnetic contactor according to the embodiment;
13 is a sectional view of the inside of a case of the electromagnetic contactor according to the embodiment;
14 is a cross-sectional view of a portion of the electromagnetic contactor according to the embodiment except for the rear case in a state in which the case of the electromagnetic contactor is lifted.
15 is a partially enlarged view of the electromagnetic contactor according to the embodiment;
16 is a partially enlarged view of the electromagnetic contactor according to the embodiment;
17 is a sectional view of the inside of the case of the electromagnetic contactor according to the embodiment.

Hereinafter, an electromagnetic (electromagnetic) contactor according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to these embodiments.

Embodiments.

1 is a perspective view of an electromagnetic contactor according to an embodiment of the present invention. 2 is a cross-sectional view of an electromagnetic contactor according to an embodiment of the present invention. In the following description, the direction indicated by the arrow x in the figure is defined as the x direction, the direction indicated by the arrow y is referred to as the y direction, and the direction indicated by the arrow z is referred to as the z direction. The same direction as the arrow is the + direction, and the direction opposite to the arrow is the -direction. For example, the same direction as the arrow x is the + x direction, and the opposite direction to the arrow x is the -x direction. In the figure showing only a part of the constituent elements of the electromagnetic contactor 1, what direction is taken in the assembled state shown in Fig. 1 is indicated by arrow x, arrow y and arrow z.

The electromagnetic contactor 1 includes a polar electromagnet 2 in which a permanent magnet and a coil are combined, a movable contact 4 on which the movable contact 6 is mounted, a movable contact 6, A stationary contactor 5 for folding and a cylindrical rear case 7 for accommodating the permanent magnet 2. The electromagnetic contactor 1 has a case 3 that covers the contact carrier 4. [ In the case 3, the stationary contactor 5 can be mounted.

3 is a cross-sectional view of a levitation electromagnet of an electromagnetic contactor according to the embodiment. The coiled electromagnet 2 has a coil 8 formed by winding a coiled bobbin 9 around a coil bobbin 9 and one end plate 12a opposite to one end 8a of the coil 8, And a coil 8 is disposed so as to oppose the other end plate portion 12b to the other end 8b of the coil 8 with the space therebetween and to face the side plate portion 12c to the outer peripheral portion 8c of the coil 8 And a pair of U-shaped fixed iron cores 12 disposed inside. The permanent magnet 2 includes a pair of permanent magnets 13 disposed inside the side plate portion 12c of the U-shaped fixed core 12 and an iron core rod 10d inserted into the coil 8, The first movable iron core 10a is positioned at one end 10d1 of the iron core 10d and the other end 10d2 of the iron core 10d is positioned outside the one end plate 12a of the U- And a movable iron core 10 provided with a second movable iron core 10b for positioning the other movable iron core 10b between the other end 8b of the coil 8 and the other end plate 12b of the U- The permanent magnet 13 has a stationary iron core 11 formed of a magnetic material on the inside of the permanent magnet 13. The distance between the second movable iron core 10b and the other end plate 12b of the U-shaped fixed iron core 12 is L2. That is, the movable iron core 10 has a displacement amount of the distance L2.

The U-shaped fixed iron core 12 is U-shaped in which the end plate portions 12a and 12b extend from both ends of the side plate portion 12c. The U-shaped fixed iron core 12 has a U-shaped cross-sectional shape perpendicular to the x-direction, that is, a cross-sectional shape including a plane extending in the y-direction and the z-direction.

Fig. 4 is a perspective view of the electromotive electromagnet of the electromagnetic contactor according to the embodiment. Fig. 5 is a perspective view of a bonded carrier of an electromagnetic contactor according to the embodiment. 6 and 7 are perspective views of a case of the electromagnetic contactor according to the embodiment. As shown in Fig. 4, the engaging portion 4a of the jam carrier 4 shown in Fig. 5 is engaged with the notch 10c provided in the first movable iron core 10a, And mounted on the iron plate 10a. As shown in Fig. 4, first engaging projections 9b and 9c are formed on the upper surface 9a of the coil bobbin 9 of the permanent magnet 2. As shown in Fig. 6, second engaging projections 3b and 3c are formed on the lower surface 3a of the case 3. As shown in Fig. The second engaging projection 3c is provided with a step 3d for holding the first engaging projection 9c. The stepped portion 3d is a portion in which the engagement between the first engaging projection 9c and the second engaging projection 3c is released in a state in which the second engaging projection 3c is engaged with the first engaging projection 9c ≪ / RTI >

Since the second movable iron plate 10b is attracted to the fixed iron plate 11 by the magnetic force of the permanent magnet 13 in the state where the coil 8 shown in Fig. 2 is not energized, (6) and the stationary contactor (5).

When the coil 8 is excited, a magnetic field for removing the magnetic field by the permanent magnet 13 acts between the movable iron core 10 and the U-shaped fixed iron core 12, (12) by a distance L2. As a result, the movable contactor 6 and the stationary contactor 5 come into contact with each other. Therefore, the distance L2, which is the amount of displacement of the movable core 10, is larger than the distance L1, and L2> L1.

The assembling procedure of the electromagnetic contactor according to the embodiment will be described. In the first procedure, the movable contactor 6 is mounted on the contact carrier 4 and inserted into the case 3. In the second procedure, the stationary contactor 5 is mounted on the case 3 and subjected to dust removal by air blowing. In the third procedure, the levitation electromagnet 2 is mounted on the adherend carrier 4. In the fourth procedure, the electromotive electromagnets 2 of the structure assembled in the first, second, and third order are inserted into the cylinder of the rear case 7, and the case 3 and the rear case 7 are combined. In the above assembling procedure, the step of inserting the electromotive electromagnets 2 into the cylinder of the rear case 7 is the final step, thereby realizing a structure in which foreign substances generated during assembly are not left in the rear case 7 as much as possible.

That is, in the electromagnetic contactor 1 having the permanent magnet 2, the fixed contact 5 is mounted after inserting the fixed contact carrier 4, in which the movable contactor 6 is mounted, into the case 3, It is possible to realize the assembling procedure in which the foreign matter is less left by combining the casing 2 and the contact carrier 4 with the case 3 and performing vibration damping and finally combining with the rear case 7. [

In order to prevent the foreign matter from entering from the outside, since the opening is not provided in the rear case 7, the case 3 and the rear case 7 ) Are incorporated, the vibration damping is not performed.

Next, the assembling procedure of the structure including the case 3, the contact carrier 4, the fixed contacts 5, and the movable contact 6 and the electromotive electromagnet 2 will be described. First, the movable contactor 5 is attached to the contact carrier 4 and inserted into the case 3. Next, the case 3 in which the jam carrier 4 is inserted is inserted in the -y direction so that the engaging portion 4a of the jam carrier 4 passes through the notch 10c provided in the first movable iron core 10a . 8 is a cross-sectional view of a portion of the electromagnetic contactor except the rear case of the embodiment in a state in which the engaging portion of the contact carrier is passed through the notch provided on the movable iron core.

After the engaging portion 4a is passed through the notch 10c and the case 3 in which the contact carrier 4 is inserted is slid in the + z direction, the contact carrier 4 and the first movable iron plate 10a are engaged with each other , And the contact carrier 4 and the levitated electromagnet 2 are connected. The assembling procedure described above allows the structure including the free magnetic electromagnet 2, the case 3, the contact carrier 4, the fixed contact 5 and the movable contactor 6 to be moved from the electromagnetic contactor 1 to the rear case 7 are assembled.

9 is a cross-sectional view of a portion of the electromagnetic contactor except the rear case of the embodiment in a state in which the case inserted with the contact carrier is slid in the + z direction. The upper face 3b1 of the second engaging projection 3b and the lower face 9b1 of the first engaging projection 9b are moved in the + z direction by sliding the case 3 in which the contact carrier 4 is inserted, And the upper surface 3c1 of the second engaging projection 3c and the lower surface 9c1 of the first engaging projection 9c are opposed to each other in the y direction.

10 is a cross-sectional view of a portion of the electromagnetic contactor according to the embodiment except for the rear case in the assembled state. 11 and 12 are partial enlarged views of the electromagnetic contactor according to the embodiment. Fig. 11 is an enlarged view of a portion A in Fig. 10 and its vicinity, and Fig. 12 is an enlarged view of a portion B and its surroundings in Fig. 13 is a cross-sectional view of the inside of a case of the electromagnetic contactor according to the embodiment. The second engaging projection 3b and the first engaging projection 9b are not completely engaged with each other in a state in which the case 3 in which the contact carrier 4 is inserted is slid in the + z direction, The upper surface 3b1 of the second engaging projection 3b and the lower surface 9b1 of the first engaging projection 9b and the lower surface of the second engaging projection 3c A clearance of a distance L3 is provided between the upper surface 3c1 and the lower surface 9c1 of the first engaging projection 9c as shown in Fig. The distance L3 of the clearance is smaller than the distance L2 shown in Fig. 2, so that L3 < L2. The distance L3 of the clearance is smaller than the distance L1 between the movable contact 6 and the fixed contact 5 in a state in which the coil 8 is not energized, so that L3 < L1.

14 is a cross-sectional view of a portion of the electromagnetic contactor according to the embodiment except for the rear case in a state in which the case of the electromagnetic contactor is lifted. Figs. 15 and 16 are partially enlarged views of the electromagnetic contactor according to the embodiment. Fig. Fig. 15 is an enlarged view of the portion C in Fig. 14 and its periphery, and Fig. 16 is an enlarged view of the portion D and its surroundings in Fig. 17 is a cross-sectional view of the inside of the case of the electromagnetic contactor according to the embodiment.

When the case 3 is lifted in the + y direction with the contact carrier 4 and the first movable iron core 10a engaged with each other, the lower face 9b1 of the first engaging projection 9b and the lower face 9b1 of the second engaging projection 9b, The upper surface 3b1 of the projection 3b abuts and the lower surface 9c1 of the first engaging projection 9c and the upper surface 3c1 of the second engaging projection 3c abut each other and the second engaging projection 3b and 3c and the first engaging projections 9b and 9c are completely engaged with each other. Therefore, when the case 3 is lifted in the + y direction, the free magnetic electromagnet 2 having the coil bobbin 9 is suspended from the case 3.

The electromagnetic contactor 1 according to the embodiment described above is provided with the first engagement projections 9b and 9c on the upper surface 9a of the coil bobbin 9 and the second engagement projections 9b and 9c on the lower surface 3a of the case 3, When the engaging projections 3b and 3c are not lifted in the + y direction, they are not completely engaged with each other. With this structure, the electromagnetic contactor 1 can be easily assembled by simply sliding the contact carrier 4 in the + z direction after engaging the first movable iron core 10a. Since the electromagnetic contactor 1 does not need to use a tool when it is assembled or disassembled, it is advantageous in that, compared with the case where a screw is fixed or a case where a claw is fitted (fitted and fitted) The number of processes can be reduced.

The first engaging projections 9b and 9c of the coil bobbin 9 are brought into contact with the second engaging projections 3b and 3c of the case 3 only when the lifting electromagnets 2 are mounted, In the assembled state, the first engaging projections 9b, 9c and the second engaging projections 3b, 3c do not interfere with each other.

When the first engaging projections 9b and 9c and the second engaging projections 3b and 3c are in contact with each other in the assembled state and the coil 8 is excited to move the movable contactor 6 when the movable iron core 10 moves, The design value of the displacement amount is different from the design value, which may affect the product performance. However, since the first engaging projections 9b and 9c and the second engaging projections 3b and 3c do not interfere with each other in the assembled state of the electromagnetic contactor 1 according to the embodiment, the first engaging projections 9b 9c and the second engaging projections 3b, 3c are provided, the possibility that the product performance is lowered can be reduced.

The distance L3 of the clearance is set shorter than the distance L1 between the movable contact 6 and the fixed contact 5 in the coil non-excitation state, The reduction amount of the distance between the movable contactor 6 and the fixed contactor 5 becomes equal to or greater than the distance L1 and the movable contactor 6 and the fixed contactor 5 are prevented from coming into contact with each other and being damaged. As a result, defective products due to deformation of the movable contactor 6 at the time of assembling work are generated, and the yield can be prevented from being lowered. Further, by shortening the assembling operation time, the energy consumption in the production process can be suppressed.

The first engaging projection 9c is held in the second engaging projection 3c of the case 3 so as to prevent the engagement between the first engaging projection 9c and the second engaging projection 3c from being released It is possible to prevent the first movable iron core 10a from coming into contact with the contact carrier 3 by the self weight of the permanent magnet 2 when the case 3 is tilted in a state in which the permanent magnet 2 is tilted, 4 can be prevented from being released. The first engaging projection 9b and the second engaging projection 9c are provided on at least one of the second engaging projections 3b and 3c, The effect of preventing the engagement between the first movable iron core 10a and the contact carrier 4 from being loosened by the own weight of the permanent magnet 2 can be obtained.

As described above, in the electromagnetic contactor 1 according to the embodiment, since the upper case 3 is assembled to the rear case 7 after the curling electromagnet 2 is also assembled to the upper case 3 , It is possible to realize an assembling method in which foreign matter generated during assembly is not left as much as possible in the rear case 7. [ In addition, the electromagnetic contactor 1 can be easily assembled because the electromotive electromagnet 2 can be suspended from the upper case 3. In addition, since the first engaging projections 9b, 9c and the second engaging projections 3b, 3c are provided with a constant clearance, the case 3 can be lifted to suspend the movable electromagnet 2, The contactor 6 and the stationary contactor 5 are not in contact with each other so that deformation and breakage of the movable contactor 6 can be prevented.

The configuration shown in the above embodiments represents one example of the content of the present invention and can be combined with other known technologies and a part of the configuration can be omitted or changed without departing from the gist of the present invention Do.

1: Magnetic contactor 2: Leaky magnetism
3: Case 3a:
3b, 3c: second engaging projection 3d: step
4: abutment carrier 4a:
5: stationary contactor 6: movable contactor
7: rear case 8: coil
9: coil bobbin 9a: upper surface
9b, 9c: first engaging projection 10: movable core
10a: first movable iron referee 10b: second movable iron referee
10c: notch 10d: iron bar
11: Fixed iron referee 12: U-shaped fixed iron core
13: permanent magnet

Claims (4)

A coil formed by winding a coil wire on a coil bobbin and a U-shaped coil extending from both ends of the side plate portion so as to face one end of the coil, A pair of U-shaped fixed iron cores disposed inside the side plate portion of the U-shaped fixed iron core so as to face each other with the other end of the coil facing the other end of the coil, and the side plate portion is opposed to the outer peripheral portion of the coil; And a first movable iron core plate disposed on one end of the one end of the U-shaped fixed core, the other end of the iron core rod being inserted into the coil, And a movable iron core provided with a second movable iron plate for positioning the other end of the coil and the other end plate of the U-shaped fixed iron core;
A movable contact carrier mountable on the first movable iron referee,
A case capable of mounting a fixed contact and covering the contact carrier,
And a rear case connected to the case to receive the curled electromagnet,
Wherein the coil bobbin includes a first engaging projection on an upper surface thereof,
Characterized in that the case includes a second engaging protrusion opposed to the first engaging projection with a clearance of a predetermined distance in a state where the attaching carrier is mounted on the first movable iron core plate Contactor. The method according to claim 1,
Wherein the clearance is smaller than a distance between the movable contact and the fixed contact in a state in which the coil is not energized. The method according to claim 1,
Wherein the second engaging projection has a step for preventing engagement between the first engaging projection and the second engaging projection when the engaging projection engages with the first engaging projection. A method for assembling an electromagnetic contactor according to any one of claims 1 to 3,
Attaching the movable contactor to the contact carrier;
A step of inserting the movable contact carrier, on which the movable contact is mounted, into the case;
A step of mounting the stationary contactor on a case into which the contact carrier is inserted;
A step of dusting the contact carrier on which the stationary contactor is mounted,
A step of engaging the contact carrier with the first movable iron plate and connecting the contact carrier with the free magnetic electromagnet;
And inserting the curled electromagnet into the rear case to connect the rear case and the case.
KR1020157016568A 2014-09-25 2014-09-25 Electromagnetic contactor and assembly method thereof KR101591637B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1167039A (en) * 1997-08-18 1999-03-09 Fuji Electric Co Ltd Electromagnetic contactor
KR100633760B1 (en) * 2004-10-21 2006-10-16 엘에스산전 주식회사 A Preserving Device for the Fixed Contact Point of Electronic Contactor
KR200430937Y1 (en) * 2006-08-25 2006-11-14 엘에스산전 주식회사 Fixing construction for bobbin of magnetic contactor
JP2010062079A (en) 2008-09-05 2010-03-18 Mitsubishi Electric Corp Polarized electromagnet, electromagnetic contactor, electromagnetic switchgear, and manufacturing method of polarized electromagnet
KR101288627B1 (en) * 2012-02-28 2013-07-19 엘에스산전 주식회사 Magnetic contactor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1167039A (en) * 1997-08-18 1999-03-09 Fuji Electric Co Ltd Electromagnetic contactor
KR100633760B1 (en) * 2004-10-21 2006-10-16 엘에스산전 주식회사 A Preserving Device for the Fixed Contact Point of Electronic Contactor
KR200430937Y1 (en) * 2006-08-25 2006-11-14 엘에스산전 주식회사 Fixing construction for bobbin of magnetic contactor
JP2010062079A (en) 2008-09-05 2010-03-18 Mitsubishi Electric Corp Polarized electromagnet, electromagnetic contactor, electromagnetic switchgear, and manufacturing method of polarized electromagnet
KR101288627B1 (en) * 2012-02-28 2013-07-19 엘에스산전 주식회사 Magnetic contactor

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