JP2021190630A - Electromagnetic contactor - Google Patents

Abstract

To obtain an electromagnetic contactor that has stable opening and closing characteristics in which the magnetic characteristics do not change from the initial state even after opening and closing operations have been repeated, and has a simple configuration with a small number of parts.SOLUTION: An electromagnetic contactor includes a coil 7, a coil bobbin 8, a fixed core 61, and a movable core 51. The fixed core 61 is divided into a fixed core 61A, a fixed core 61B, and a fixed core 61C that support the coil bobbin 8, and a gap 9A is provided between the fixed core 61A and the fixed core 61B, and a gap 9B is provided between the fixed core 61A and the fixed core 61C.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to an electromagnetic contactor having a movable core, a fixed core and a coil.

In the electromagnetic contactor, by applying a voltage to the coil, a magnetic path is formed by the movable core and the fixed core, the movable core is attracted by the fixed core, and the movable core is attracted to the fixed core. When stopping the magnetic contactor, the magnetic flux is reduced by releasing the voltage applied to the coil, and the holding force of the electromagnet is lower than the repulsive force of the spring supporting the moving part including the movable iron core. The movable core is dissociated from the fixed core.

In the electromagnetic contactor of Patent Document 1, a gap is provided at the contact surface position between the movable core and the central pole of the E-shaped fixed core, and when the movable core collides with the fixed core, what is the central pole of the fixed core? I try not to touch it. It is the gap provided between the movable core and the fixed core that guarantees the above-mentioned reduction in the magnetic flux, and the movable core can be reliably dissociated by the gap becoming a magnetic resistance.

Jitsukaisho 59-65456 Gazette

In Patent Document 1, since a gap is provided at the contact surface position between the movable core and the central pole of the fixed core, if the surfaces of the left and right poles that come into contact with each other when the movable core is opened and closed are worn, the distance between the gaps provided in advance becomes short. As a result, the magnetic flux does not decrease sufficiently due to the elimination of the voids, and there is a possibility that the movable iron core will not open. Further, even if the gap that can be opened is secured, there is a problem that the opening characteristic of the electromagnet changes significantly from the initial state after the opening / closing operation is repeatedly performed due to the change in the distance of the gap.

The present disclosure has been made in view of the above, and is simple, having stable opening / closing characteristics in which the magnetic characteristics do not change from the initial state even after repeated opening / closing operations, and a small number of parts. The purpose is to obtain an electromagnetic contactor that is a configuration.

In order to solve the above-mentioned problems and achieve the object, the present disclosure describes a coil, a coil bobbin around which the coil is wound, a fixed core in which a magnetic field is generated by a current flowing through the coil, and a magnetic field generated by the fixed core. A movable core that moves by action, the fixed core is located in the middle, the first fixed core that supports the coil bobbin, and the second fixed core and the third fixed core that are located on both sides of the first fixed core. It is divided into a fixed core, a first gap is provided between the first fixed core and the second fixed core, and a second gap is provided between the first fixed core and the third fixed core. It is characterized by being provided.

According to the present disclosure, stable opening / closing characteristics in which the magnetic characteristics do not change from the initial state can be obtained even after the opening / closing operation is repeatedly performed. Further, it is possible to realize an electromagnetic contactor having a simple configuration with a small number of parts.

A perspective view showing the overall external structure of the magnetic contactor of the first embodiment. A perspective view showing the internal structure of the electromagnet portion of the electromagnetic contactor of the first embodiment. Sectional drawing which shows the internal structure of the electromagnet part of the electromagnetic contactor of Embodiment 1. Sectional drawing which shows the internal structure of the electromagnet part of the electromagnetic contactor of Embodiment 2. Sectional drawing which shows the internal structure of the electromagnet part of the electromagnetic contactor of Embodiment 3. A perspective view showing the structure of a permanent magnet included in the electromagnetic contactor of the third embodiment. A perspective view showing the internal structure of the electromagnet portion of the electromagnetic contactor of the fourth embodiment. Sectional drawing which shows the internal structure of the electromagnet part of the electromagnetic contactor of Embodiment 4. A perspective view showing a coil bobbin and an inner fixed iron core of the electromagnet portion of the electromagnetic contactor of the fourth embodiment.

Hereinafter, the electromagnetic contactor according to the embodiment will be described in detail with reference to the drawings. In the following description, the direction in which the movable core and the fixed core move due to contact and non-contact is defined as the vertical direction, and the direction across the vertical direction and along the longitudinal direction of the movable core is the width direction. The direction that crosses the vertical direction and is along the short side of the movable iron core is defined as the depth direction.

Embodiment 1.
The first embodiment will be described with reference to FIGS. 1, 2, and 3. FIG. 1 is a perspective view showing the overall external structure of the electromagnetic contactor 1 of the first embodiment. FIG. 2 is a perspective view showing the internal structure of the electromagnet portion constituting the electromagnetic contactor 1 of the first embodiment. FIG. 3 is a cross-sectional view of the electromagnet portion of the first embodiment. As shown in FIG. 1, the electromagnetic contactor 1 accommodates a top case 2 constituting an arc extinguishing chamber accommodating a contact portion and an electromagnet portion that drives a movable contactor accommodated in the contact portion in the vertical direction by an electromagnetic force. The bottom case 3 is provided with plate-shaped coil terminals 4A and 4B protruding in the width direction of the bottom case 3. The coil terminals 4A and 4B are for wiring by the user when a voltage is applied to the coil 7 of the electromagnetic contactor 1, and are made of, for example, an iron-based metal. The coil terminals 4A and 4B and the coil 7 arranged in the bottom case 3 are bonded to each other by, for example, soldering (not shown), and a current flows through the coil 7 via the coil terminals 4A and 4B.

As shown in FIG. 2, the electromagnet portion in the bottom case 3 is a fixed iron core magnetized by a coil bobbin 8, a copper coil 7 that is multiple times wound around the coil bobbin 8, and a magnetic field generated by applying an electric current to the coil 7. It is configured to include a 61 and a movable iron core 51 that moves in the vertical direction by a magnetized fixed iron core 61. The fixed core 61 is divided into three fixed cores 61A, 61B, and 61C. The fixed core 61A corresponds to the first fixed core in the claims, the fixed core 61B corresponds to the second fixed core in the claims, and the fixed core 61C corresponds to the third fixed core in the claims. Corresponds to. The coil bobbin 8 is fixed to the bottom case 3.

The movable core 51 and the fixed cores 61A, 61B, 61C may be composed of either a laminated core or a bulk core. Further, the structure of the fixed parts for preventing the positional deviation of the fixed cores 61A, 61B, 61C and the movable core 51, the presence or absence of the fixed parts for connecting the cores in the case of the laminated core, and the fixed parts thereof are used. The number of cases is not limited.

As shown in FIG. 3, both the movable core 51 and the fixed core 61 have an E-shaped core structure. The fixed core 61 is divided into three fixed cores 61A, 61B, 61C in the width direction, and voids 9A, 9B are provided between the fixed cores 61A, 61B, 61C. The void 9A corresponds to the first void in the claims, and the void 9B corresponds to the second void in the claims. Specifically, the shape of the divided fixed core 61 is as follows: the central pole fixed core 61A has a convex (T-shaped) shape, the left pole fixed core 61B has an L-shape, and the right pole fixed core 61B. 61C is L-shaped. The distance between the gaps 9A and 9B differs depending on the main circuit current of the magnetic contactor, but the magnetic circuit characteristics can be changed by changing the distance between the gaps 9A and 9B according to the opening / closing characteristics. .. The magnetic fluxes 12A and 12B generated from the coil 7 flow out from the fixed core 61A of the central pole, and if the electromagnet portion is symmetrical, flow into the fixed core 61B of the left pole and the fixed core 61C of the right pole almost evenly. .. Details of the flow of the magnetic fluxes 12A and 12B will be described later. The gap 10 located between the movable core 51 and the fixed cores 61A, 61B, 61C is the same distance between the central pole and the left and right poles. Further, the width direction and the paper surface depth direction of the fixed iron cores 61A, 61B, 61C are positioned by the bottom case 3. Therefore, the fixed iron cores 61A, 61B, and 61C do not rattle.

The coil bobbin 8 is fitted to the outside of the fixed iron core 61A of the T-shaped central pole. The direction of the axis of the coil bobbin 8 coincides with the direction in which the movable iron core 51 moves, that is, the vertical direction. On the lower side of the coil bobbin 8 in the vertical direction, two protrusions 8A and 8B extending downward so as to be away from the coil bobbin 8 are provided. The protrusion 8A is arranged between the fixed core 61A and the fixed core 61B, and the protrusion 8B is arranged between the fixed core 61A and the fixed core 61C. The protrusions 8A and 8B function as spacers. The protrusion 8A corresponds to the first spacer and the first protrusion in the claims, and the protrusion 8B corresponds to the second spacer and the second protrusion in the claims.

The operation and effect of the electromagnetic contactor 1 configured as described above will be described with reference to FIGS. 2 and 3. When a voltage is applied to the coil terminals 4A and 4B shown in FIG. 1, a current flows through the coil 7 and magnetic fluxes 12A and 12B are generated in the coil 7 and the coil bobbin 8. A magnetic field is formed by the generated magnetic fluxes 12A and 12B, and flows through the fixed core 61A of the central pole to magnetize the fixed core 61A. Assuming that the electromagnet portion is symmetrical and the magnetic flux flows into the fixed iron cores 61B and 61C of the left and right poles almost evenly, the flow of the magnetic flux 12A on the left side in the width direction will be described. The magnetic flux 12A advances downward in the vertical direction from the fixed iron core 61A of the central pole. Next, when flowing in the width direction from the fixed core 61A of the central pole, it passes through the gap 9A provided between the fixed core 61A of the central pole and the fixed core 61B of the left pole, and flows into the fixed core 61B of the left pole. do. After that, the fixed core 61B of the left pole proceeds upward in the vertical direction, passes through the gap 10 with the movable core 51, and returns to the fixed core 61A of the central pole via the movable core 51. When an AC voltage is applied, the direction of the magnetic flux is reversed upside down, so the order is reversed from the above-mentioned flow.

When a certain period of time elapses and the magnetization of the movable iron core 51 progresses, an attractive force acts on the movable iron core 51, and the force exceeds the force of the return spring (not shown) that supports the movable iron core 51, so that the movable iron core 51 is moved in the vertical direction. It moves toward the fixed cores 61A, 61B, 61C located on the lower side, and after colliding with the tangent surfaces 11A, 11B, 11C, maintains the suction state with the fixed cores 61A, 61B, 61C.

The suction state between the movable core 51 and the fixed cores 61A, 61B, 61C is maintained as long as the voltage applied to the coil 7 does not fluctuate, but the voltage applied to the coil 7 by the user drops by a certain value or more from the rating. In this case, the movable core 51 and the fixed cores 61A, 61B, 61C must be dissociated. Therefore, the magnetic circuit formed by the movable core 51 and the fixed cores 61A, 61B, 61C has a magnetic resistance. It is necessary to provide one or more voids.

There are two generally well-known methods for ensuring magnetic resistance. The first method is to provide a gap between the central pole of the movable core and the central pole of the fixed core. The second method is to fix the spacer of the non-magnetic material to the tangential surface of the movable iron core or the fixed iron core.

However, each of these methods has its own problems. In the first method, the tangent surface of the movable core and the fixed core wears due to repeated opening and closing, and the gap distance provided in advance is shortened, so that the opening and closing characteristics change between the initial state and after repeated opening and closing. This leads to variations in quality. Specifically, since the magnetic resistance obtained by the void becomes small and the magnetic flux in the adsorption state becomes easy to flow, it becomes difficult for the movable iron core and the fixed iron core to dissociate, and even if the voltage becomes constant or less, the movable iron core becomes difficult. It cannot be denied that the fixed core may cause the problem of poor opening without dissociation.

In the second method, the voids are physically secured in order to prevent the change of the voids mentioned as the first problem, but in this method, a step of fixing the spacer of the non-magnetic material occurs. Therefore, there is a problem that the manufacturing cost of the product becomes high. Further, since the movable core magnetized by the fixed core moves at a speed of about 1 m / s, the energy when colliding with the fixed core depends on the square of the speed and the mass of the movable part including the movable core. , It becomes a relatively large value. Therefore, the non-magnetic spacer may continue to receive an impact due to repeated opening and closing, resulting in fatigue failure and falling off from the fixed surface.

In the first embodiment, the voids 9A and 9B that serve as magnetic resistance are formed by dividing the fixed iron core 61 and arranged at a position other than the tangential surface, so that the movable iron core 51 and the fixed iron cores 61A, 61B and 61C collide with each other. The structure is not affected by wear and impact. Therefore, since the opening / closing characteristics do not change from the initial state even after repeated use, the quality is stable and the manufacturing cost can be reduced.

Further, according to the first embodiment, the gaps 9A and 9B formed by the divided fixed iron cores 61A, 61B and 61C can be easily secured to a certain distance by the protrusions 8A and 8B of the coil bobbin 8, and further, the bottom case. Since the positional deviation of the fixed cores 61A, 61B, 61C can be suppressed by 3, for example, the voids 9A, 9B having a certain distance are maintained without using another component for connecting the fixed cores 61A, 61B, 61C. be able to. Therefore, it is not necessary to ensure the accuracy of each part, and the number of parts can be reduced, so that the assemblability is greatly improved and the manufacturing cost can be further reduced.

Further, when the movable iron core 51 is magnetized and moves, a phenomenon occurs in which the fixed cores 61A, 61B, 61C are slightly lifted upward in the vertical direction. However, in the first embodiment, the coil bobbin fixed to the bottom case 3 occurs. 8 can restrict the movement of the fixed cores 61A, 61B, 61C to the upper side.

As described above, according to the first embodiment, the gaps 9A and 9B formed by the divided fixed cores 61A, 61B and 61C are arranged at positions other than the tangential surface between the movable core 51 and the fixed core 61. Therefore, the opening / closing characteristics do not change from the initial state even after repeated use, and stable opening / closing characteristics can be obtained. Further, since the fixed iron cores 61A, 61B, 61C are positioned by the bottom case 3, a dedicated part for connecting the fixed iron cores 61A, 61B, 61C is not required, and the number of parts is small and the cost is low. An electromagnetic contactor can be realized.

Embodiment 2.
The second embodiment will be described with reference to FIG. FIG. 4 is a diagram showing a configuration example of the electromagnet portion of the electromagnetic contactor 100 of the second embodiment. In the magnetic contactor 100 of the second embodiment shown in FIG. 4, the components overlapping with the components of the magnetic contactor 1 of the first embodiment shown in FIG. 3 are designated by the same reference numerals and overlap with each other. The explanation is omitted. That is, also in the second embodiment, as in the first embodiment, the gaps 9A and 9B are provided between the divided fixed iron cores 61A, 61B and 61C, and the protrusions 8A and 8B are provided in these gaps 9A and 9B. 8B is intervening. Further, the fixed cores 61A, 61B, 61C are surrounded and held by a bottom case 3 (not shown), and the width direction and the paper depth direction of the fixed cores 61A, 61B, 61C are positioned by the bottom case 3.

In the second embodiment, the shape of the movable core 52 is T-shaped, and the height of the fixed core 61A of the central pole in the vertical direction is lower than that of the fixed cores 61B and 61C of the left and right poles. The movable iron core 52 becomes T-shaped, and the central pole 52A of the movable iron core 52 extends to the vicinity of the center position in the vertical direction of the coil bobbin 8 in which a large amount of magnetic flux is generated, so that the moving movable iron core 52 is easily magnetized. That is, since the movable iron core 52 can be magnetized with a small magnetomotive force, the movable iron core 52 can be excited with a small current, in other words, the movable iron core 52 can be moved with a small energy. Therefore, the impact force applied to the fixed cores 61A, 61B, 61C by the movable iron core 52 can be reduced. Further, since the required power at the time of turning on is reduced, the transformer for operating the magnetic contactor 100 can be miniaturized.

According to the second embodiment, since the shape of the movable iron core 52 is T-shaped, it is possible to excite the movable iron core 52 with a small current, and it is possible to reduce the size of the transformer when operating the electromagnetic contactor 100. can.

Embodiment 3.
Next, the third embodiment will be described with reference to FIGS. 5 and 6. FIG. 5 is a diagram showing a configuration example of the electromagnet portion of the electromagnetic contactor 200 according to the third embodiment. FIG. 6 is a diagram showing a configuration example of the permanent magnet 13A. In the magnetic contactor 200 of the third embodiment shown in FIG. 5, the components overlapping with the components of the magnetic contactor 1 of the first embodiment shown in FIG. 3 are designated by the same reference numerals and overlap. The explanation is omitted. That is, also in the third embodiment, as in the first embodiment, the gaps 9A and 9B are provided between the divided fixed iron cores 61A, 61B and 61C, and the protrusions 8A and 9B are provided in the gaps 9A and 9B. 8B is intervening. Further, the fixed cores 61A, 61B, 61C are surrounded and held by a bottom case 3 (not shown), and the width direction and the paper depth direction of the fixed cores 61A, 61B, 61C are positioned by the bottom case 3.

In the third embodiment, a recess 17A extending in the width direction is provided at a position facing the fixed core 61B of the left pole in the lower portion of the fixed core 61A of the central pole, and a permanent magnet 13A is arranged in the recess 17A. Further, a recess 17B extending in the width direction is provided at a position facing the fixed core 61C of the right pole in the lower portion of the fixed core 61A of the central pole, and a permanent magnet 13B is arranged in the recess 17B. As shown in FIG. 6, the permanent magnets 13A and 13B have a rectangular parallelepiped shape. In FIG. 5, reference numerals 14A and 14B indicate the magnetic flux of the permanent magnet 13A, and reference numerals 14C and 14D indicate the magnetic flux of the permanent magnet 13B.

According to the third embodiment, since the permanent magnets 13A and 13B are arranged below the fixed iron core 61A of the central pole, the amount of magnetic flux in the attracted state can be increased and the holding current can be reduced. .. Since the power consumption can be reduced by reducing the holding current, the power supply device and the transformer required for maintaining the adsorption state can be miniaturized. Further, by strengthening the magnetic force of the permanent magnets 13A and 13B, once attracted, the attracted state can be maintained even if there is no holding current, and a magnetic latch electromagnetic contactor having a power consumption of 0 W can be configured. Permanent magnets 13A and 13B may be provided on the fixed iron core 61A of the electromagnetic contactor 100 of the second embodiment.

Embodiment 4.
The fourth embodiment will be described with reference to FIGS. 7, 8 and 9. FIG. 7 is a diagram showing a configuration example of the electromagnet portion of the electromagnetic contactor 300 according to the fourth embodiment. FIG. 8 is a cross-sectional view of the electromagnet portion of the fourth embodiment. FIG. 9 is a perspective view showing the coil bobbin 81 and the inner fixed iron core 64A of the electromagnet portion of the fourth embodiment.

In the fourth embodiment, the movable iron core 53 has a U-shaped shape, and the fixed iron core 64 has an H-shaped shape. The fixed core 64 is divided into an inner fixed core 64A, a left pole fixed core 64B, and a right pole 64C. A gap 16A is provided between the inner fixed core 64A and the left pole fixed core 64B, and a gap 16B is provided between the inner fixed core 64A and the right pole fixed core 64C. With such a configuration including the movable iron core 53 and the fixed iron core 64, the magnetic contactor 300 can be miniaturized in the depth direction. The inner fixed core 64A corresponds to the first fixed core in the claims, the fixed core 64B corresponds to the second fixed core in the claims, and the fixed core 64C corresponds to the third fixed core in the claims. Corresponds to the iron core. The void 16A corresponds to the first void in the claims, and the void 16B corresponds to the second void in the claims.

Further, although not shown, the fixed iron cores 64A, 64B, and 64C are surrounded and held by a bottom case 3 (not shown) as in the first embodiment. That is, the width direction and the paper surface depth direction of the fixed iron cores 64A, 64B, 64C are positioned by the bottom case 3.

A coil bobbin 81 is arranged around the inner fixed iron core 64A. The direction of the axis of the coil bobbin 81 is perpendicular to the direction in which the movable iron core 53 moves. A coil 7 is wound around the coil bobbin 81. Since the movable iron core 53 is U-shaped, the contact surface of the movable iron core 53 with the fixed iron core 64 is only the left and right poles. Therefore, the inner fixed core 64A that magnetically connects the fixed iron cores 64B and 64C of the left and right poles is arranged, and the coil bobbin 81 is in close contact with the inner fixed iron core 64A.

The inner fixed iron core 64A has a main body portion 64AA in the center and flange portions 64AB on both sides. The main body portion 64AA is inserted inside the coil bobbin 81 and has a substantially cylindrical shape. The flange portion 64AB is a flat plate having a larger diameter than the main body portion 64AA.

As shown in FIG. 9, the coil bobbin 81 has a central winding portion 81A and flange portions 81B on both sides. The flange portion 81B is a flat plate having a larger diameter than the winding portion 81A. The winding portion 81A has a hollow tubular shape, and the main body portion 64AA of the inner fixed iron core 64A is inserted therein. The diameter of the flange portion 64AB of the inner fixed iron core 64A is larger than the diameter of the winding portion 81A of the coil bobbin 81. The flange portion 64AB of the inner fixed iron core 64A is in close contact with the flange portion 81B of the coil bobbin 81. The main body portion 64AA of the inner fixed iron core 64A can adopt any shape as long as it has a shape that can be inserted into the winding portion 81A. Coil terminals 4A and 4B extend from one flange portion 81B. The coil terminals 4A and 4B are wired to the coil 7.

Projections 15A and 15B that function as spacers are provided on the surface of the flange portion 81B of the coil bobbin 81 that faces the fixed iron core 64B of the left pole. Projections 15C and 15D that function as spacers are provided on the surface of the flange portion 81B of the coil bobbin 81 that faces the fixed iron core 64C of the right pole. These protrusions 15A, 15B, 15C, and 15D can maintain a constant distance between the inner fixed cores 64A and the left and right pole fixed cores 64B, 16B. Therefore, the structure is such that the magnetic resistance does not change even after the movable iron core 53 is repeatedly opened and closed with respect to the fixed iron core 64. The protrusion 15A corresponds to the first spacer and the first protrusion in the claims, and the protrusion 15B corresponds to the second spacer and the second protrusion in the claims.

Further, the flange portion 64AB of the inner fixed iron core 64A is larger than the diameter of the winding portion 81A of the coil bobbin 81, and the flange portion 64AB of the inner fixed iron core 64A is in close contact with the flange portion 81B of the coil bobbin 81, so that the inner fixing is fixed. It is possible to prevent the iron core 64A from being displaced in the width direction.

In such a configuration, the magnetic flux generated from the coil 7 has the width direction of the coil bobbin 81 as the traveling direction, and the magnetic flux 18 flows into the movable core 53 from the fixed cores 64B and 64C of the left and right poles. When the magnetization of the movable core 53 is sufficiently advanced, an attractive force acts on the movable core 53, and the force exceeds the force of the return spring (not shown) that supports the movable core 53, so that the movable core 53 moves toward the fixed core 64. It moves and sticks to the fixed iron core 64.

As described above, according to the fourth embodiment, the gaps 16A and 16B are provided between the inner fixed core 64A and the left and right pole fixed cores 64B and 64C, and the gaps 16A and 16B are provided as in the other embodiments. Is not located on the tangent surface between the movable iron core 53 and the fixed iron core 64. Therefore, since the opening / closing characteristics do not change from the initial state even after repeated use, the quality is stable and the manufacturing cost can be reduced. Further, the protrusions 15A, 15B, 15C, and 15D are interposed in the gaps 16A and 16B, so that the magnetic resistance does not change even after repeated opening and closing.

The configuration shown in the above-described embodiment shows an example of the contents of the present disclosure, can be combined with another known technique, and is one of the configurations as long as it does not deviate from the gist of the present disclosure. It is also possible to omit or change the part.

1,100,200,300 Electromagnetic contactor, 2 Top case, 3 Bottom case, 4A, 4B coil terminal, 7 coil, 8,81 coil bobbin, 8A, 8B, 15A, 15B, 15C, 15D protrusion, 9A, 9B, 10, 16A, 16B void, 12A, 12B magnetic flux, 13A, 13B permanent magnet, 17A, 17B recess, 51, 52, 53 movable core, 61, 61A, 61B, 61C, 64, 64A, 64B, 64C fixed core.

Claims (8)

With the coil
The coil bobbin around which the coil is wound and
A fixed iron core that generates a magnetic field due to the current flowing through the coil,
A movable iron core that moves due to the action of the magnetic field generated by the fixed core, and
Equipped with
The fixed core is divided into a first fixed core located in the center and supporting the coil bobbin, and a second fixed core and a third fixed core located on both sides of the first fixed core. A first gap is provided between the first fixed core and the second fixed core, and a second gap is provided between the first fixed core and the third fixed core. Characterized electromagnetic contactor. The magnetic contactor according to claim 1, wherein the coil bobbin has a first spacer interposed in the first void and a second spacer interposed in the second void. The magnetic contactor according to claim 2, further comprising a first fixed core, a second fixed core, and a bottom case that surrounds and holds the third fixed core. The movable iron core is E-shaped.
The fixed core having the first fixed core, the second fixed core, and the third fixed core is E-shaped.
The direction of the axis of the coil bobbin coincides with the direction in which the movable iron core moves.
The first spacer is a first protrusion provided on the coil bobbin so as to extend away from the coil bobbin along the direction of the axis of the coil bobbin, and the second spacer is the shaft of the coil bobbin. The electromagnetic contactor according to claim 2 or 3, wherein the magnetic contactor is a second protrusion provided on the coil bobbin so as to extend away from the coil bobbin along the direction of the above. The first fixed iron core is T-shaped and has a T-shape.
The electromagnetic contactor according to claim 4, wherein the second fixed core and the third fixed core are L-shaped. The movable iron core is T-shaped.
The fixed core having the first fixed core, the second fixed core, and the third fixed core is E-shaped.
The direction of the axis of the coil bobbin coincides with the direction in which the movable iron core moves.
The first spacer is a first protrusion provided on the coil bobbin so as to extend away from the coil bobbin along the direction of the axis of the coil bobbin, and the second spacer is the shaft of the coil bobbin. The electromagnetic contactor according to claim 2 or 3, wherein the magnetic contactor is a second protrusion provided on the coil bobbin so as to extend away from the coil bobbin along the direction of the above. The first fixed iron core is characterized in that a first permanent magnet is provided at a position facing the first gap and a second permanent magnet is provided at a position facing the second gap. The electromagnetic contactor according to any one of claims 1 to 6. The movable iron core is U-shaped.
The fixed iron core is H-shaped and has an H shape.
The direction of the axis of the coil bobbin is perpendicular to the direction in which the movable iron core moves.
The first spacer is a third protrusion provided on the coil bobbin so as to extend away from the coil bobbin along the direction of the axis of the coil bobbin, and the second spacer is the shaft of the coil bobbin. The electromagnetic contactor according to claim 2 or 3, wherein the magnetic contactor is a fourth protrusion provided on the coil bobbin so as to extend away from the coil bobbin along the direction of the above.

Images