electromagnetic contactor

Abstract

To enable the connection of the crossbar and control member in an electromagnetic contactor without using link pins. [Solution] An electromagnetic contactor comprising a coil 11, a fixed iron piece 12 that is energized when current flows through the coil, a movable iron piece 13 that is attracted to the fixed iron piece when the fixed iron piece is energized, a crossbar 15 that can move a movable contact 141, a contact portion 14 that can change the main circuit supplying power to a load from an open state to a closed state when the movable contact, which is linked to the movable iron piece, contacts the fixed contact 142, a guide shaft portion 16 formed on the crossbar or a member linked to the crossbar, and a control member 17 equipped with a restricting portion 171 that can restrict the movement of the guide shaft portion when the excitation of the fixed iron piece is off, wherein the control member is movable in conjunction with the movement of the guide shaft portion.

Description

Technical Field

[0001] The present invention relates to an electromagnetic contactor.

Background Art

[0002] As described in Patent Document 1, an electromagnetic contactor is known that utilizes the principle that a movable iron piece is attracted to a fixed iron piece when the fixed iron piece is excited.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

[0004] Incidentally, the electromagnetic contactor disclosed in Patent Document 1 is provided with a link pin for connecting a crossbar and a fixed control member. In order to properly operate the link pin relative to the fixed control member, advanced techniques are required for design and assembly. Further, since the electromagnetic contactor disclosed in Patent Document 1 has a structure that moves one end and the other end of the link pin in different directions, a large space is required for the movement path. Under such circumstances, there has been a demand to eliminate the link pin, but it has been difficult to connect the fixed control member and the movable crossbar without using a link pin.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The inventor of the present application has attempted to solve this problem through extensive and intensive studies. The problem to be solved by the present invention is to make it possible to connect a crossbar and a control member in an electromagnetic contactor without using a link pin.

Means for Solving the Problems

[0006] To solve the above problems, an electromagnetic contactor is provided comprising: a coil; a fixed iron piece that is energized when current flows through the coil; a movable iron piece that is attracted to the fixed iron piece when the fixed iron piece is energized; a crossbar that can move a movable contact; a contact portion that, when the movable contact linked to the movable iron piece contacts the fixed contact, can change the main circuit that supplies power to the load from an open state to a closed state; a guide shaft portion formed on the crossbar or a member linked to the crossbar; and a control member equipped with a restricting portion that can restrict the movement of the guide shaft portion when the excitation of the fixed iron piece is off, wherein the control member is movable in conjunction with the movement of the guide shaft portion.

[0007] Furthermore, it is preferable that the control member has a guide space through which the operating guide shaft can pass, and that the positional relationship between the control member, the crossbar and the guide shaft can be changed by moving the guide shaft vertically so as to pass through the guide space.

[0008] Furthermore, it is preferable to have a configuration in which the primary terminal connected to the power supply is positioned on the right side and the secondary terminal connected to the load is positioned on the left side, and when the guide shaft is in a state where it can move in the vertical direction, the control member can be moved so that the right end of the control member is shifted to the right or the left end of the control member is shifted to the left by the guide shaft moving through the guide space.

[0009] Furthermore, it is preferable that the pivot axis of the control member be positioned at a location offset upward or downward relative to the range of motion of the guide shaft.

[0010] Furthermore, it is preferable that the pivot axis of the control member be positioned at a location offset in the left-right direction from the guide axis.

[0011] Furthermore, the control member has a guide space formed between the first guide portion and the second guide portion located around the first guide portion, and the control member is rotatable by the pressing force received from the guide shaft portion that abuts against the first inclined portion provided on the upper part of the first guide portion. It is preferable to have this configuration.

[0012] Furthermore, it is preferable that the control member is configured to apply a force that allows the guide space to return to its predetermined position if it has rotated from its predetermined position before the contact is activated.

[0013] Furthermore, the control member comprises a contact member having a switch that can switch whether or not to pull a movable iron piece towards a fixed iron piece by turning the switch on or off, and a switch operating member that can be used to press the switch. The control member is linked to a guide shaft that is linked to the crossbar, and the switch operating member comprises a first locking part that can contact the control member, and a second locking part that can contact the crossbar or a member that performs the same operation simultaneously with the crossbar as the guide shaft moves relative to the switch operating member. It is preferable that the timing of the release of the state in which the first locking part and the control member are in contact and the timing of the release of the state in which the second locking part is in contact with the crossbar or a member that performs the same operation simultaneously with the crossbar are staggered before the pressing of the switch is completed.

[0014] Furthermore, it is preferable that, as the guide shaft moves relative to the switch operating member, the contact between the control member and the first locking part is released, and then the contact between the crossbar or a member that performs the same operation as the crossbar and the second locking part is released.

[0015] Furthermore, it is preferable that at least one of the fixed iron piece and the movable iron piece is configured such that the opposing ends of the suction surface are bent in the same direction, thereby forming a cavity on the back side of the suction surface. [Effects of the Invention]

[0016] In this invention, it is possible to connect the crossbar and the control member in an electromagnetic contactor without using a link pin. [Brief explanation of the drawing]

[0017] [Figure 1] This is a perspective view of an electromagnetic contactor in an embodiment. [Figure 2] This is a perspective view showing a partially cut-away state of the electromagnetic contactor shown in Figure 1. [Figure 3] This is a diagram showing the internal structure around the crossbar of the electromagnetic contactor shown in Figure 1. [Figure 4] This is a diagram showing the internal structure around the control member of the electromagnetic contactor shown in Figure 1. Note that the fixed contact and the movable contact are in a separated state. [Figure 5] This is a diagram showing an example of a circuit in a state where no voltage is applied. Note that the switching unit is at the ON contact, and neither the ON button nor the OFF button is pressed. [Figure 6] This is a diagram showing the internal structure around the control member of the electromagnetic contactor shown in Figure 1. Note that the guide shaft portion is in contact with the first inclined portion, and the fixed contact and the movable contact are closer to each other than in the state shown in Figure 4. [Figure 7] This is a diagram showing the internal structure around the control member of the electromagnetic contactor shown in Figure 1. Note that the guide shaft portion is just before separating from the first inclined portion, and the fixed contact and the movable contact are closer to each other than in the state shown in Figure 6. [Figure 8] This is a diagram showing the internal structure around the control member of the electromagnetic contactor shown in Figure 1. Note that the guide shaft portion is caught on the stopper. [Figure 9] This is a diagram showing the internal structure around the control member of the electromagnetic contactor shown in Figure 1. Note that the guide shaft portion is caught on the restricting portion. [Figure 10] This is a diagram showing the internal structure around the control member of the electromagnetic contactor shown in Figure 1. Note that the guide shaft portion is released from the restricting portion, and the pressing force on the switch is released. [Figure 11] This is a diagram showing the internal structure around the control member of the electromagnetic contactor shown in Figure 1. Note that the guide shaft portion is in contact with the second inclined portion, and the fixed contact and the movable contact are in a separated state. [Figure 12]This is a diagram showing the internal structure around the control member of the electromagnetic contactor shown in Figure 1. Note that the guide shaft portion is separated from the first guide portion, and the fixed contact and the movable contact are more separated than in the state shown in Figure 11. [Figure 13] This is a perspective view showing examples of the fixed iron piece and the movable iron piece in the embodiment. [Mode for Carrying Out the Invention]

[0018] Hereinafter, modes for carrying out the invention will be described. The electromagnetic contactor 1 of the embodiment includes a coil 11, a fixed iron piece 12 that is excited when current flows through the coil 11, a movable iron piece 13 that is attracted to the fixed iron piece 12 when the fixed iron piece 12 is excited, a crossbar 15 capable of moving the movable contact 141, a contact portion 14 capable of switching the main circuit that supplies power to the load from an open state to a closed state when the movable contact 141 interlocked with the movable iron piece 13 comes into contact with the fixed contact 142, a guide shaft portion 16 formed on the crossbar 15 or a member interlocked with the crossbar 15, and a control member 17 provided with a restricting portion 171 capable of restricting the movement of the guide shaft portion 16 when the excitation of the fixed iron piece 12 is off, and the control member 17 is movable along with the movement of the guide shaft portion 16. Therefore, in the electromagnetic contactor 1, it is possible to connect the crossbar 15 and the control member 17 without using a link pin.

[0019] The electromagnetic contactor 1 includes a fixed contact 142 and a movable contact 141, and can switch between a contact state and a non-contact state of these contacts. As can be understood from Figures 1 to 3, the movable contacts 141 are respectively provided at both ends of the support member 41 provided on the crossbar 15, and each of these movable contacts 141 can come into contact with a separate fixed contact 142. When the main circuit that supplies power to the load is in an open state, all the movable contacts 141 provided at both ends of the support member 41 come into contact with the fixed contacts 142, so that the main circuit that supplies power to the load can be brought into a closed state. Such switching can be performed by utilizing the presence or absence of energization to the coil 11 provided in the electromagnetic contactor 1.

[0020] The electromagnetic contactor 1 of this embodiment includes a fixed iron piece 12 and a movable iron piece 13. The fixed iron piece 12 is energized when electricity flows through the coil 11, and the movable iron piece 13 is attracted to the fixed iron piece 12 when the fixed iron piece 12 is energized. When the movable iron piece 13 is attracted to the fixed iron piece 12, the movable contact 141 moves to contact the fixed contact 142, and when the movable contact 141 and the fixed contact 142 are in contact, electricity sent from the power supply connected to the primary terminal 21 can be sent to the load connected to the secondary terminal 22. Conversely, when the movable contact 141 and the fixed contact 142 are separated, electricity cannot be sent to the load connected to the secondary terminal 22.

[0021] In this embodiment, the crossbar 15 moves as the movable iron piece 13 moves. Since the crossbar 15 is equipped with a guide shaft portion 16, the guide shaft portion 16 moves as the movable iron piece 13 moves. Note that the guide shaft portion 16 does not necessarily have to be provided on the crossbar 15; the guide shaft portion 16 may be provided on a member that is interlocked with the crossbar 15.

[0022] The guide shaft portion 16 moves when the fixed iron piece 12 is energized, and its positional relationship with the control member 17 changes as it moves. The control member 17 in this embodiment rotates around the pivot axis 23, and the control member 17 rotates as the guide shaft portion 16 moves. The pivot axis 23 extends in the direction in which the poles are aligned, and extends perpendicular to the vertical direction (the direction in which the case 26 and cover 27 that form the outer casing of the electromagnetic contactor 1 are aligned) and the left-right direction (the direction connecting the primary terminal 21 to which the power supply is connected and the secondary terminal 22 to which the load is connected). Note that it is not essential for the electromagnetic contactor 1 to have multiple poles.

[0023] Furthermore, in order to simplify the structure and allow the control member 17 to be moved with less force, it is preferable that the pivot axis 23 of the control member 17 be positioned at a location offset upward or downward from the range of motion of the guide shaft portion 16.

[0024] Furthermore, in order to enable rotation in the correct direction, it is preferable that the pivot axis 23 of the control member 17 be positioned at a location offset in the left-right direction from the guide shaft portion 16.

[0025] Furthermore, in order to facilitate proper operation, it is preferable that the control member 17 is configured to have a force applied to it that allows the guide space Gr to return to its predetermined position if it rotates from its predetermined position before the contact is turned on. In this embodiment, a spring is used to apply the force, but the method of applying the force is not limited to this.

[0026] In this embodiment, the control member 17, which is moved by contact with the guide shaft portion 16, is configured such that a portion of the guide shaft portion 16 fits into a recess provided in the control member 17. In this embodiment, the control member 17 has two recesses, which are spaced apart. More specifically, a recess is provided at the location where the cross section is cut in Figure 3, but another recess is also provided at the opposite location across the contact portion 14. This configuration allows for stable movement of the control member 17.

[0027] Since the guide shaft portion 16 passes through the guide space portion Gr formed in the control member 17, the control member 17 moves in response to the movement of the guide shaft portion 16, and this movement changes the positional relationship between the "control member 17" and the "crossbar 15 and guide shaft portion 16". The structure in which the guide shaft portion 16 passes through the guide space portion Gr formed in the control member 17 makes it possible to suppress the increase in size of the electromagnetic contactor 1.

[0028] In this embodiment, a guide space Gr is formed between the first guide portion 172 and the second guide portion 173 located around the first guide portion 172. The first guide portion 172 is the part that moves around the guide shaft portion 16 as the guide shaft portion 16 moves, and is configured such that there are times when both its upper and lower sides come into contact with the guide shaft portion 16.

[0029] In this embodiment, the second guide portion 173 is located outside the first guide portion 172 and is configured to enclose the first guide portion 172. By providing the second guide portion 173 around the first guide portion 172, it is possible to prevent the guide shaft portion 16 from coming off the control member 17. Furthermore, the second guide portion 173 in this embodiment can also be used to adjust the positional relationship between the first guide portion 172 and the guide shaft portion 16.

[0030] As can be understood from the above, it is preferable that the control member 17 has a guide space Gr through which the operating guide shaft portion 16 can pass, and that the positional relationship between the control member 17, the crossbar 15 and the guide shaft portion 16 can be changed by moving the guide shaft portion 16 in the vertical direction so as to pass through the guide space Gr.

[0031] Furthermore, in order to avoid increasing the size of the electromagnetic contactor 1, it is preferable that the electromagnetic contactor 1 be configured such that the primary terminal 21 connected to the power supply is on the right side and the secondary terminal 22 connected to the load is on the left side, and that the control member 17 is moved such that the right end of the control member 17 is shifted to the right or the left end of the control member 17 is shifted to the left, by moving the guide shaft 16 so that it passes through the guide space Gr while the guide shaft 16 is in a state where it can move in the vertical direction.

[0032] Furthermore, in order to facilitate the proper movement of the control member 17, it is preferable that the control member 17 has a guide space Gr formed between the first guide portion 172 and the second guide portion 173, and that the control member 17 is rotatable by the pressing force received from the guide shaft portion 16 which abuts against the first inclined portion 172a provided on the upper part of the first guide portion 172.

[0033] In this embodiment, the guide shaft portion 16 moves linearly in accordance with the movement of the movable iron piece 13, and the contact point between the guide shaft portion 16 and the control member 17 changes during this linear movement.

[0034] For example, in this embodiment, the control member 17 is equipped with a restricting unit 171 that can restrict the movement of the guide shaft 16 so that the fixed contact 142 and the movable contact 141 remain in contact even when the excitation of the fixed iron piece 12 is released. The control member 17 is configured to allow both movement to bring the guide shaft 16 toward the restricting unit 171 and movement to release the guide shaft 16 from the restricting unit 171, but the contact point between the guide shaft 16 and the control member 17 changes when such movement occurs.

[0035] Here, we will explain the movement of the main parts of the electromagnetic contactor 1 during operation. Figure 4 shows the state when no voltage is applied. In this state, the guide shaft portion 16 is located above the first guide portion 172. The state of the circuit of this embodiment at this point is as shown in Figure 5.

[0036] In this state, when the ON button 51 is pressed, in this embodiment, current begins to flow through the coil 11, and the fixed iron piece 12 is energized. The movable iron piece 13 is then attracted to the energized fixed iron piece 12 (see Figures 4, 6, 7, and 8). When the movable iron piece 13 is attracted to the fixed iron piece 12, the guide shaft portion 16, which is linked to the movable iron piece 13, presses downward against the first inclined portion 172a, which is located on the upper part of the first guide portion 172. This pressing force causes the control member 17 to rotate counterclockwise, and the guide shaft portion 16 and the first inclined portion 172a move relative to each other (see Figures 6 and 7).

[0037] As the guide shaft portion 16 and the first inclined portion 172a move relative to each other, the first locking portion 251 of the switch operating member 25 disengages from the control member 17, but the second locking portion 252 remains in contact with the contact portion of the crossbar 15 (see Figures 6 and 7). As a result, the switch operating member 25 rotates only slightly counterclockwise, and at this stage, the switch 241 is not yet pressed.

[0038] Furthermore, as the guide shaft portion 16 and the first inclined portion 172a move relative to each other, the guide shaft portion 16 disengages from the first inclined portion 172a and moves downward in the guide space portion Gr (see Figures 7 and 8). As a result of this, the second locking portion 252 disengages from the contact portion, causing the switch operating member 25 to rotate further counterclockwise and press the switch 241 of the contact member 24. When the switch 241 is pressed by the switch operating member 25, the contact of the switching portion 28 in the circuit switches from the on contact 281 to the off contact 282, and the flow of electricity to the coil 11 stops. The guide shaft portion 16 is locked by the convex stopper 174 of the control member 17, which stops it from moving downward (see Figure 8).

[0039] When the flow of electricity to the coil 11 stops, the guide shaft portion 16 moves upward. With the guide shaft portion 16 suspended in mid-air, the control member 17 rotates clockwise, and the guide shaft portion 16 is locked into the concave restricting portion 171 provided on the first guide portion 172 of the control member 17 (see Figure 9). By locking the guide shaft portion 16 into the restricting portion 171, the contact portion 14 can be kept on (the fixed contact 142 and the movable contact 141 remain in contact) while the current is stopped.

[0040] In order to properly turn off the switch 241 with a simple structure, it is preferable to have an electromagnetic contactor 1 that includes a contact member 24 having a switch 241 that can switch whether or not to pull the movable iron piece 13 towards the fixed iron piece 12 by turning the switch 241 on or off, and a switch operating member 25 that can be used to press the switch 241, and the control member 17 is able to be linked with a guide shaft portion 16 which is linked with the crossbar 15, and the switch operating member 25 has a first locking portion 251 that can contact the control member 17, and a second locking portion 252 that can contact the crossbar 15 or a member that performs the same operation simultaneously with the crossbar 15 as the guide shaft portion 16 moves relative to the switch operating member 25, and the timing of the release of the state in which the first locking portion 251 and the control member 17 are in contact with each other and the timing of the release of the state in which the second locking portion 252 is in contact with the crossbar 15 or a member that performs the same operation simultaneously with the crossbar 15 is staggered before the pressing of the switch 241 is completed.

[0041] In the case of such an electromagnetic contactor 1, it is preferable that, as the guide shaft portion 16 moves relative to the switch operating member 25, the contact between the control member 17 and the first locking portion 251 is released, and then the contact between the crossbar 15 or a member that performs the same operation as the crossbar 15 and the second locking portion 252 is released.

[0042] Next, we will explain an example of switching the contact portion 14 from the ON state (the fixed contact 142 and the movable contact 141 are in contact) to the OFF state (the fixed contact 142 and the movable contact 141 are separated). When the OFF button 52 is pressed using an electrical signal or the like, current flows through the coil 11, and the movable iron piece 13 is attracted to the fixed iron piece 12. When the movable iron piece 13 is attracted to the fixed iron piece 12, the guide shaft portion 16 moves downward in the guide space portion Gr (see Figures 9 and 10). At that time, the control member 17 rotates clockwise, pushing up the first locking portion 251 of the switch operating member 25. As a result, the switch operating member 25 moves clockwise, and the pressure of the contact member 24 on the switch 241 is released. When the pressure of the contact member 24 on the switch 241 is released, the contact of the contact switching portion 28 in the circuit switches from the OFF contact 282 to the ON contact 281, and the flow of electricity to the coil 11 stops.

[0043] When the flow of electricity to the coil 11 stops, the movable iron piece 13 moves away from the fixed iron piece 12 (see Figures 10 and 11). In this embodiment, the control member 17 returns to its designated position before the movable iron piece 13 moves.

[0044] As the movable iron piece 13 moves away from the fixed iron piece 12, the guide shaft portion 16 moves upward. At this time, since the end of the second inclined portion 172b provided on the first guide portion 172 extends to the right of the center line of the guide shaft portion 16, the rising guide shaft portion 16 comes into contact with the second inclined portion 172b and rotates the control member 17 clockwise (see Figures 10 and 11).

[0045] When the guide shaft portion 16 rises and disengages from the second inclined portion 172b, the control member 17 rotates counterclockwise and returns to the specified position together with the guide shaft portion 16 (see Figures 11 and 12).

[0046] Incidentally, the fixed iron piece 12 and the movable iron piece 13 in this embodiment are each constructed by bending a single metal plate to create a cavity on the back side of the suction surface. The suction surface 131 of the movable iron piece 13 and the suction surface 121 of the fixed iron piece 12 are surfaces that come into contact when the fixed iron piece 12 is energized, and are configured to be planar.

[0047] The fixed iron piece 12 in this embodiment has portions extending in the same direction from both ends of the suction surface 121, and has a U-shape when viewed from the side. The portion enclosed by the suction surface 121 and the portions extending in the same direction from both ends of the suction surface 121 forms a cavity 122.

[0048] Furthermore, the movable iron piece 13 also has portions extending in the same direction from both ends of the suction surface 131, and its side view is U-shaped. Similar to the fixed iron piece 12, the portion enclosed by the suction surface 131 and the portions extending in the same direction from both ends of the suction surface 131 becomes a cavity 132.

[0049] While the fixed iron piece 12 and the movable iron piece 13 are usually made thick, if they are provided with portions extending in the same direction from both ends of the suction surface, thereby creating a hollow structure, the weight of the electromagnetic contactor 1 can be expected to be reduced.

[0050] Therefore, it is preferable that at least one of the fixed iron piece 12 and the movable iron piece 13 is configured such that the opposing ends of the suction surface are bent in the same direction, thereby forming a cavity on the back side of the suction surface.

[0051] Incidentally, in this embodiment, a manual button 61 is provided to allow the crossbar 15 of the electromagnetic contactor 1 to be moved without using electrical force. This manual button 61 is part of the crossbar 15 and is configured to be pressed from outside the cover 27 when necessary.

[0052] Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments and can be configured in various ways. For example, the control member and switch operating member do not have to be limited to rotation, and can be configured to perform other movements such as sliding. [Explanation of symbols]

[0053] 1 Magnetic contactor 11 coils 12 Fixed iron piece 13 Movable Iron Piece 14 Contact points 15 Crossbar 16 Guide shaft 17 Control Member 21 Primary side terminal 22 Secondary side terminal 23 Rotating shafts 121 Suction surface (fixed iron piece) 122 Cavity (fixed iron piece) 131 Suction surface (movable iron piece) 132 Cavity (movable iron piece) 172 First Guide Section 173 Second Guide Section 241 switches 251 First locking part 252 Second locking section 172a 1st slope Gr Guide Space

Claims

1. Coil and, A fixed iron piece is energized by the flow of current through the coil, When the fixed iron piece is energized, the movable iron piece is attracted to the fixed iron piece, A crossbar that allows the movable contacts to be moved, A contact section in which a movable contact, which is linked to a movable iron piece, contacts a fixed contact, thereby enabling the main circuit that supplies power to the load to be changed from an open state to a closed state, A guide shaft portion formed on the crossbar or a member that is interlocked with the crossbar, A control member equipped with a restricting unit capable of restricting the movement of the guide shaft when the excitation of the fixed iron piece is off, Equipped with, An electromagnetic contactor in which the control member is movable in conjunction with the movement of the guide shaft.

2. The control member has a guide space formed therein through which the operating guide shaft can pass. The electromagnetic contactor according to claim 1, wherein the positional relationship between the control member, the crossbar and the guide shaft can be changed by moving the guide shaft portion vertically so that it passes through the guide space portion.

3. With the primary terminal connected to the power supply on the right and the secondary terminal connected to the load on the left, and the guide shaft being able to move vertically, The electromagnetic contactor according to claim 2, which is capable of moving the control member so that the right end of the control member is shifted to the right or the left end of the control member is shifted to the left, by the guide shaft portion moving through the guide space portion.

4. The electromagnetic contactor according to claim 3, wherein the pivot axis of the control member is positioned at a location offset upward or downward with respect to the range of motion of the guide shaft portion.

5. The electromagnetic contactor according to claim 4, wherein the pivot axis of the control member is positioned offset in the left-right direction from the guide shaft portion.

6. The control member has a guide space formed between the first guide portion and the second guide portion located around the first guide portion. The electromagnetic contactor according to claim 4 or 5, wherein the control member is rotatable by a pressing force received from a guide shaft that abuts against a first inclined portion provided on the upper part of the first guide portion.

7. The electromagnetic contactor according to claim 6, wherein the control member is subjected to a force that allows the guide space to return to a predetermined position if it has rotated from a predetermined position before the contact is turned on.

8. A contact member having a switch that can switch whether or not to pull a movable iron piece towards a fixed iron piece by turning the switch on or off, A switch operating member that can be used to press the switch, Equipped with, The control member is capable of being linked with the guide shaft portion which is linked with the crossbar. The switch operating member comprises a first locking portion that can contact the control member, and a second locking portion that can contact the crossbar or a member that performs the same operation as the crossbar as the guide shaft moves relative to the switch operating member. The electromagnetic contactor according to claim 1, wherein the timing of the release of the state in which the first locking part and the control member are in contact and the timing of the release of the state in which the second locking part is in contact with the crossbar or a member that performs the same operation as the crossbar are staggered, and the pressing of the switch is completed after these staggered timings.

9. The electromagnetic contactor according to claim 8, wherein, as the guide shaft moves relative to the switch operating member, the contact between the control member and the first locking part is released, and then the contact between the crossbar or a member that performs the same operation as the crossbar and the second locking part is released.

10. The electromagnetic contactor according to claim 1 or 8, wherein at least one of the fixed iron piece and the movable iron piece has opposing ends on the suction surface bent in the same direction so that a cavity is formed on the back side of the suction surface.

Images