JP2023039059A - Electromagnetic contactor - Google Patents

Abstract

An electromagnetic contactor is provided that includes an a contact and a b contact in an electric line that supplies power to a load. The present invention is fixed to a movable electromagnet, moves to a first side and a second side in a first direction, includes a first contact and a second contact, and penetrates in a second direction intersecting the first direction. a contact support part having a first window part and a second window part; a first movable contact installed in the first window part; a third plate part; electrically connected to the third plate part; a fourth plate part provided on the first side of the third plate part; a first fixed contact having a fifth plate part; electrically connected to the fifth plate part; a second fixed contact provided with a sixth plate portion provided on the first side; a first fixed contact and a second fixed contact; a second movable contact provided in the second window portion; and the second movable contact. An electromagnetic contactor comprising a third fixed contact and a fourth fixed contact that are in contact with or separated from each other. [Selection diagram] Figure 4

Description

The present disclosure relates to electromagnetic contactors.

Patent Literature 1 discloses an electromagnetic contactor having an electromagnet device including a fixed core, a movable core, and an operation coil, and a movable frame connected to the movable core. In Patent Document 1, an electromagnetic contactor includes a movable contact in which movable contacts are provided at both ends and an intermediate portion is elastically held by a movable frame, and a fixed contact in which the movable contact contacts and separates according to the operation of the movable frame. and a stationary contact provided with a.

Patent Document 2 discloses a fixed iron core, a movable iron core, an operation coil, a crossbar attached to the movable iron core, a movable contact biased and held by the crossbar, and a movable contact of the movable contact. and a stationary contact on which a stationary contact is formed.

Patent Document 3 discloses a contact device attached to an electromagnetic contactor. Patent Literature 3 discloses an a-contact configuration and a b-contact configuration.

JP-A-07-006680 Japanese Utility Model Laid-Open No. 59-079946 Japanese Utility Model Laid-Open No. 02-137737

In the electromagnetic contactor as exemplified in Patent Documents 1 and 2, it is conceivable to configure the contact of the electric circuit for supplying power to the load with an a-contact or a b-contact. Since a large amount of electric power flows through an electric circuit that supplies power to a load, it is desirable to configure the electric circuit so that the arc generated when the contacts are separated does not affect other electric circuits.

An object of the present disclosure is to provide an electromagnetic contactor that includes an a-contact and a b-contact in an electric circuit that supplies power to a load.

According to one aspect of the present disclosure, a fixed electromagnet, an operation coil, and a movable electromagnet are fixed to the movable electromagnet. It moves to the first side in one direction, and when the power to the operating coil is cut off, it moves away from the fixed electromagnet together with the movable electromagnet and moves to the second side opposite to the first side in the first direction. , a contact support portion having a first window portion and a second window portion penetrating in a second direction intersecting the first direction; a first plate portion extending in a third direction side; a first contactor fixed to the second side of the first plate portion; and the third side in the second direction with respect to the first window portion. a first movable contact comprising: a second plate portion extending to a fourth side opposite to the second plate portion; a second contactor fixed to the second side of the second plate portion; a first contact spring whose first side end is fixed to the first side end of the first window portion and whose second side end presses the first movable contact; and the first contactor. a third contact that contacts or separates; a third plate portion that includes the third contact on the first side; is electrically connected to the third plate portion; and a fourth plate portion provided on the third side and connected to an external wiring, a first fixed contact, a fourth contact in contact with or separated from the second contact, and the fourth contact a fifth plate portion provided on the first side; a second fixed contact comprising a plate portion; a seventh plate portion installed in the second window portion and extending to the third side in the second direction with respect to the second window portion; and the seventh plate. a fifth contact fixed to the first side of the portion; an eighth plate portion extending toward the fourth side in the second direction with respect to the second window; a second movable contact that is compressed in the first direction and the second side end is fixed to the second side end of the second window; a second contact spring whose end on the first side presses the second movable contact; a seventh contact that contacts or separates from the fifth contact; A third fixed contact comprising the seventh contactor on the surface of the second side and a ninth plate portion to which the wiring from the outside is connected to the third side, and is in contact with or separated from the sixth contactor. an eighth contact, extending in the second direction and on the third side; and a fourth fixed contact provided with an eighth plate portion to which wiring from the outside is connected to the fourth side. do.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide an electromagnetic contactor having an a-contact and a b-contact in an electric circuit that supplies power to a load.

FIG. 1 is an overall perspective view of an electromagnetic contactor according to this embodiment. FIG. 2 is a front view of the electromagnetic contactor according to this embodiment. FIG. 3 is a diagram for explaining the internal configuration of the electromagnetic contactor according to this embodiment. FIG. 4 is a perspective view illustrating the contact configuration of the electromagnetic contactor according to this embodiment. FIG. 5 is a diagram showing a contact support portion of the electromagnetic contactor according to this embodiment. FIG. 6 is a diagram for explaining the contact operation of the electromagnetic contactor according to this embodiment. FIG. 7 is a diagram for explaining the contact operation of the electromagnetic contactor according to this embodiment. FIG. 8 is a diagram for explaining the contact operation of the electromagnetic contactor according to this embodiment. FIG. 9 is a diagram for explaining the contact operation of the electromagnetic contactor according to this embodiment. FIG. 10 is a side view of the electromagnetic contactor according to this embodiment. FIG. 11 is a perspective view of the spring receiver of the electromagnetic contactor according to this embodiment. FIG. 12 is a perspective view of the movable contact of the electromagnetic contactor according to this embodiment.

Hereinafter, each embodiment of the present invention will be described with reference to the accompanying drawings. In addition, regarding the descriptions of the specifications and drawings according to each embodiment, components having substantially the same or corresponding functional configurations may be denoted by the same reference numerals, thereby omitting duplicate descriptions. Also, to facilitate understanding, the scale of each part in the drawings may differ from the actual scale.

<Electromagnetic contactor 1>
First, the electromagnetic contactor 1 according to this embodiment will be described. FIG. 1 is an overall perspective view of an electromagnetic contactor 1 according to this embodiment. FIG. 2 is a front view of the electromagnetic contactor 1 according to this embodiment. FIG. 3 is a diagram illustrating the internal configuration of the electromagnetic contactor 1 according to this embodiment. Specifically, FIG. 3 is a diagram showing the inside of the electromagnetic contactor 1 exposed by cutting the casing of the electromagnetic contactor 1 .

For convenience of explanation, a virtual three-dimensional coordinate system (XYZ orthogonal coordinate system) consisting of mutually orthogonal X, Y and Z axes (XYZ axes) may be set in the drawing. However, the coordinate system is defined for explanation and does not limit the attitude of the electromagnetic contactor 1 and the like.

In the present disclosure, the X-axis direction is the direction in which the input terminal 21, the input terminal 22, the input terminal 23, and the input terminal 26 of the electromagnetic contactor 1 are arranged side by side unless otherwise specified. Similarly, the X-axis direction is the direction in which the output terminal 31, the output terminal 32, the output terminal 33, and the output terminal 36 of the electromagnetic contactor 1 are arranged side by side. The Y-axis direction is the direction in which the input terminal 21, the input terminal 22, the input terminal 23, and the input terminal 26 of the electromagnetic contactor 1 are aligned with the output terminal 31, the output terminal 32, the output terminal 33, and the output terminal 36, respectively. be. The Z-axis is a direction perpendicular to the X-axis and the Y-axis.

The electromagnetic contactor 1 supplies electric power supplied from a power source or the like to a load such as a motor, cuts off the supply of electric power to the load, or performs switching according to a control signal. The electromagnetic contactor 1 has an upper housing 11 and a lower housing 12 . The magnetic contactor 1 has a substantially rectangular parallelepiped outer shape due to the upper housing 11 and the lower housing 12 . The electromagnetic contactor 1 is installed on a control panel or the like by attaching the bottom portion 12e of the lower housing 12 to a rail or the like.

The electromagnetic contactor 1 includes an input terminal 21, an input terminal 22, and an input terminal 23 to which power is supplied from a power supply. The electromagnetic contactor 1 also includes an output terminal 31, an output terminal 32, and an output terminal 33 for supplying power supplied to the input terminal 21, the input terminal 22, and the input terminal 23, respectively, to a load.

The input terminal 21 and the output terminal 31 are terminals for the main contact 51A for power switching. Also, the input terminal 22 and the output terminal 32 are terminals for the main contact 52A for power switching. Further, the input terminal 23 and the output terminal 33 are terminals for the main contact 53A for power switching.

The electromagnetic contactor 1 also has an input terminal 26 and an output terminal 36 to which a display, a switch, a control device, etc. are connected. The input terminal 26 and the output terminal 36 are terminals for the auxiliary contact 56A for signal output.

Furthermore, the magnetic contactor 1 includes coil terminals 41 and coil terminals 42 . The coil terminal 41 and the coil terminal 42 are terminals for supplying electric power to the operation coil 17 which will be described later.

The upper housing 11 includes wall portions 11 a between the input terminals 21 and 22 , between the input terminals 22 and 23 , and between the input terminals 23 and 26 . Similarly, wall portions 11 a are provided between the output terminals 31 and 32 , between the output terminals 32 and 33 , and between the output terminals 33 and 36 . The wall portion 11a prevents arcs generated at the main contact 51A, the main contact 52A, the main contact 53A, and the auxiliary contact 56A from jumping to adjacent electric circuits and short-circuiting.

The electromagnetic contactor 1 includes a fixed electromagnet 15 , a movable electromagnet 16 , an operating coil 17 and a contact support portion 50 . The fixed electromagnet 15 is fixed to the lower housing 12 . The movable electromagnet 16 is movable with respect to the upper housing 11 and the lower housing 12 .

The movable electromagnet 16 is pushed in the +Z direction by a return spring (not shown). Therefore, when power is not supplied to the operating coil 17, the movable electromagnet 16 moves to the +Z side. On the other hand, when power is supplied to the operating coil 17 via the coil terminals 41 and 42 , the movable electromagnet 16 is attracted to the fixed electromagnet 15 . Therefore, when a predetermined power is supplied to the operating coil 17, the movable electromagnet 16 moves to the -Z side opposite to the +Z side.

The contact support portion 50 is fixed to the movable electromagnet 16 . The contact support portion 50 then moves together with the movable electromagnet 16 . That is, when power is not supplied to the operating coil 17 , the contact support portion 50 moves to the +Z side together with the movable electromagnet 16 . On the other hand, when the operation coil 17 is supplied with a predetermined power, the contact support 50 moves together with the movable electromagnet 16 to the -Z side opposite to the +Z side.

<Contact configuration of the electromagnetic contactor 1>
Next, the contact configuration of the electromagnetic contactor 1 according to this embodiment will be described. FIG. 4 is a perspective view illustrating the contact configuration of the electromagnetic contactor 1 according to this embodiment.

The electromagnetic contactor 1 includes a main contact 51A, a main contact 52A, a main contact 53A and an auxiliary contact 56A. The main contact 51A, the main contact 52A, the main contact 53A and the auxiliary contact 56A are respectively provided with a movable contact 51c, a movable contact 52c, a movable contact 53c and a movable contact 56c. Each of the movable contact 51c, the movable contact 52c, the movable contact 53c, and the movable contact 56c is held by the contact support portion 50 while being pushed in the Z-axis direction by a contact spring (see FIGS. 6 to 9). A contact spring is mounted on the contact support 50 so as to be compressed in the Z-axis direction.

[Contact support part 50]
FIG. 5 is a side view of the contact support portion 50 of the electromagnetic contactor 1 according to this embodiment. The contact support portion 50 has a window portion 51h, a window portion 52h, a window portion 53h, and a window portion 56h penetrating in the Y-axis direction.

The contact support portion 50 holds the movable contact 51c of the main contact 51A in the window portion 51h. The contact support portion 50 has a projection 51a on the +Z side of the window portion 51h and a projection 51b on the -Z side. One of the protrusions 51a and 51b fixes one end of the contact spring 51s (see FIGS. 8 and 9). The other of the projecting portion 51a and the projecting portion 51b is to be contacted by the movable contact 51c. Further, the contact support portion 50 has guide portions 51p projecting in the X-axis direction from both sides in the X-axis direction in the window portion 51h. The guide portion 51p prevents a later-described spring receiver 51r (see FIGS. 8 and 9) from coming off the window portion 51h.

The contact support portion 50 holds the movable contact 52c of the main contact 52A in the window portion 52h. The contact support portion 50 has a projection 52a on the +Z side of the window portion 52h and a projection 52b on the -Z side. One of the projections 52a and 52b fixes one end of the contact spring 52s (see FIG. 5 or 6). The other of the projecting portion 52a and the projecting portion 52b is to be contacted by the movable contact 52c. Further, the contact support portion 50 has guide portions 52p projecting in the X-axis direction from both sides in the X-axis direction in the window portion 52h. The guide portion 52p prevents the spring receiver 52r from coming off the window portion 52h.

The contact support portion 50 holds the movable contact 53c of the main contact 53A in the window portion 53h. The contact support portion 50 has a projection 53a on the +Z side of the window portion 53h and a projection 53b on the -Z side. One of the protrusions 53a and 53b fixes one end of the contact spring. The other of the projecting portion 53a and the projecting portion 53b is to be contacted by the movable contact 53c. Further, the contact support portion 50 has guide portions 53p projecting in the X-axis direction from both sides in the X-axis direction in the window portion 53h. The guide portion 53p prevents the spring receiver 53r from coming off the window portion 53h.

The contact support portion 50 holds the movable contact 56c of the auxiliary contact 56A in the window portion 56h. The contact support portion 50 has a projection 56a on the +Z side of the window portion 56h and a projection 56b on the -Z side. One of the protrusions 56a and 56b fixes one end of the contact spring. The other of the projecting portion 56a and the projecting portion 56b is to be contacted by the movable contact 56c. Further, the contact support portion 50 has guide portions 56p projecting in the X-axis direction from both sides in the X-axis direction in the window portion 56h. The guide portion 56p prevents the spring receiver 56r from coming off the window portion 56h.

[Main contact 51A]
51 A of main contacts are provided with the input side fixed contact 21a which comprises the input terminal 21, the movable contact 51c, and the output side fixed contact 31a which comprises the output terminal 31. As shown in FIG. The main contact 51A also includes a contact spring 51s and a spring receiver 51r. The main contact 51A is a b-contact. The b-contact is a contact that is connected when power is not supplied to the operating coil 17 and separated when power is supplied to the operating coil 17 . A b-contact is also called a break contact, a normally closed contact, or a normally closed (NC) contact.

[Main contact 52A]
52 A of main contacts are provided with the input side fixed contact 22a which comprises the input terminal 22, the movable contact 52c, and the output side fixed contact 32a which comprises the output terminal 32. As shown in FIG. The main contact 52A also includes a contact spring 52s and a spring receiver 52r. The main contact 52A is an a-contact. The a-contact is a contact that is separated when power is not supplied to the operating coil 17 and is connected when power is supplied to the operating coil 17 . The a-contact is also called a make contact, a normally open contact, or a normally open (NO) contact.

[Main contact 53A]
53 A of main contacts are provided with the input side fixed contact 23a which comprises the input terminal 23, the movable contact 53c, and the output side fixed contact 33a which comprises the output terminal 33. As shown in FIG. The main contact 53A also includes a contact spring (not shown) and a spring receiver 53r. The main contact 53A is an a-contact. The input side fixed contact 23a has the same shape as the input side fixed contact 22a. Moreover, the output-side fixed contact 33a has the same shape as the output-side fixed contact 32a.

[Auxiliary contact 56A]
56 A of auxiliary contacts are provided with the input side fixed contact 26a which comprises the input terminal 26, the movable contact 56c, and the output side fixed contact 36a which comprises the output terminal 36. As shown in FIG. Further, the auxiliary contact 56A includes a contact spring (not shown) and a spring receiver 56r. The auxiliary contact 56A is an a-contact. The input side fixed contact 23a has the same shape as the input side fixed contact 22a except for the contactor portion. The output side fixed contact 33a has the same shape as the output side fixed contact 32a except for the contactor portion.

(Spring receiver)
The spring receiver 51r, the spring receiver 52r, the spring receiver 53r, and the spring receiver 56r are parts having the same shape. The installation direction of the spring receiver 51r is opposite to the Z-axis direction with respect to the spring receiver 52r, the spring receiver 53r, and the spring receiver 56. As shown in FIG. In this specification, the same shape is not limited to strictly the same shape, but means the same shape or similar shape within standard manufacturing tolerances.

Since the spring receiver 51r, the spring receiver 52r, the spring receiver 53r, and the spring receiver 56r have the same shape, the shape of the spring receiver will be described using the spring receiver 52r. FIG. 11 is a perspective view of the spring receiver 52r of the electromagnetic contactor 1 according to this embodiment.

The spring receiver 52r holds and fixes the end of the contact spring 52s on the movable contact 52c side. Also, the spring receiver 52r prevents the contact spring 52s from coming off the window 52h.

The spring receiver 52r is made of metal, for example. The spring receiver 52r has a horizontal plate portion 52r1, and vertical plate portions 52r2 and 52r6. The horizontal plate portion 52r1 has a plate-like shape on the XY plane. The vertical plate portion 52r2 has a plate-like shape extending from the +Y side end of the horizontal plate portion 52r1 toward the +Z side in the Z-axis direction and parallel to the ZX plane. The vertical plate portion 52r6 has a plate-like shape parallel to the ZX plane extending from the −Y side end of the horizontal plate portion 52r1 toward the +Z side in the Z-axis direction.

The horizontal plate portion 52r1 has a protrusion 52rp on the +Z side surface 52rS1. The protrusion 52rp holds the −Z side end of the contact spring 52s. The protrusion 52rp prevents the contact spring 52s from shifting in the X-axis direction or the Y-axis direction. A surface 52rS2 on the -Z side of the horizontal plate portion 52r1 contacts a surface 52cS1 (see FIG. 12) of the movable contact 52c, which will be described later.

The vertical plate portion 52r2 has a detachment prevention portion 52r3 and a detachment prevention portion 52r4 that protrude in the X-axis direction from the horizontal plate portion 52r1 at both ends in the X-axis direction. In addition, the vertical plate portion 52r6 has a detachment prevention portion 52r7 and a detachment prevention portion 52r8 projecting in the X-axis direction from the horizontal plate portion 52r1 at both ends in the X-axis direction.

The spring receiver 52r prevents the spring receiver 52r from detaching from the window 52h by sandwiching the guide portion 52p of the window 52h between the detachment prevention portion 52r3 and the detachment prevention portion 52r7. Further, the spring receiver 52r prevents the spring receiver 52r from being detached from the window 52h by sandwiching the guide portion 52p of the window 52h between the detachment prevention portion 52r4 and the detachment prevention portion 52r8.

By preventing the spring receiver 52r from coming off the window 52h, the spring receiver 52r prevents the contact spring 52s from coming off the window 52h.

(movable contact)
The movable contact 51c, the movable contact 52c, and the movable contact 53c for the main contact are components of the same shape. The movable contact 51c is arranged opposite to the Z-axis direction with respect to the movable contact 52c and the movable contact 53c. The movable contact 56c for the auxiliary contact is a component having the same shape as the movable contact 51c, the movable contact 52c, and the movable contact 53c for the main contacts, except for the shape of the contact portion.

Since the movable contact 51c, the movable contact 52c, and the movable contact 53c for the main contact have the same shape, the shape of the movable contact will be explained using the movable contact 52c. FIG. 12 is a perspective view of the movable contact 52c of the electromagnetic contactor 1 according to this embodiment.

The movable contact 52c is made of metal, for example. The movable contact 52c has a horizontal plate portion 52c1, horizontal plate portions 52c2 and 52c3, and connection plate portions 52c4 and 52c5. The horizontal plate portion 52c1, the horizontal plate portion 52c2, and the horizontal plate portion 52c3 have plate-like shapes parallel to the XY plane. The horizontal plate portion 52c2 and the horizontal plate portion 52c3 are located on the +Z side in the +Z direction with respect to the horizontal plate portion 52c1. The +Y side end of the horizontal plate portion 52c1 and the -Y side end of the horizontal plate portion 52c2 are connected by a connection plate portion 52c4. The −Y side end of the horizontal plate portion 52c1 and the +Y side end of the horizontal plate portion 52c3 are connected by a connection plate portion 52c5.

A spring receiver 52r is attached to the +Z side surface 52cS1 of the lateral plate portion 52c1. Specifically, the surface 52rS2 of the spring receiver 52r is attached to the +Z side surface of the horizontal plate portion 52c1. The −Z side surface 52cS2 of the lateral plate portion 52c1 contacts the protrusion 52b of the window portion 52h.

<Operation of contact a>
52 A of main contacts of the electromagnetic contactor 1 which concerns on this embodiment are a contacts. The operation of the a-contact in the magnetic contactor 1 according to this embodiment will be described using the main contact 52A. FIG.6 and FIG.7 is a figure explaining contact operation|movement of a contact of the electromagnetic contactor 1 which concerns on this embodiment. 6 shows the case where power is not supplied to the operating coil 17 of the electromagnetic contactor 1 (OFF state), and FIG. 7 shows the case where power is supplied to the operating coil 17 of the electromagnetic contactor 1 (ON state). Since the main contact 53A is an a-contact having the same structure as the main contact 52A, the description is omitted.

The input-side fixed contact 22a of the main contact 52A will be described. The input-side fixed contact 22a includes a contactor 22ac and a plate portion 22a1. Contactor 22ac contacts or separates from contactor 52cc. The plate portion 22a1 has a plate-like shape extending in the Y-axis direction. The plate portion 22a1 has a contact 22ac on the -Y side of the +Z side surface 22aS. In addition, the plate portion 22a1 is connected to wiring from the outside on the +Y side, and is supplied with electric power from the outside.

Next, the output-side fixed contact 32a of the main contact 52A will be described. The output-side fixed contact 32a includes a contactor 32ac and a plate portion 32a1. The contactor 32ac contacts or separates from the contactor 52cd. The plate portion 32a1 has a plate-like shape extending in the Y-axis direction. The plate portion 32a1 includes a contact 32ac on the +Y side of the +Z side surface 32aS. In addition, the plate portion 32a1 is connected to wiring from the outside on the -Y side, and is supplied with electric power from the outside.

(off state)
The a-contact is cut off in the OFF state, that is, in a state in which the operating coil 17 of the electromagnetic contactor 1 is not supplied with power. Therefore, in the OFF state, that is, in a state in which power is not supplied to the operating coil 17 of the electromagnetic contactor 1, the movable contact 52c is separated from the input side fixed contact 22a and the output side fixed contact 32a. In other words, the contact 22ac of the input-side fixed contact 22a and the contact 52cc of the movable contact 52c are separated. Further, the contactor 32ac of the output-side fixed contact 32a and the contactor 52cd of the movable contact 52c are separated from each other.

In the OFF state, the movable contact 52c contacts the protrusion 52b of the contact support 50. As shown in FIG.

(on state)
The a-contact is connected in an ON state, that is, in a state in which power is supplied to the operating coil 17 of the electromagnetic contactor 1 . Therefore, in the ON state, that is, in a state in which power is supplied to the operating coil 17 of the electromagnetic contactor 1, the movable contact 52c is in contact with each of the input side fixed contact 22a and the output side fixed contact 32a. In other words, the contact 22ac of the input side fixed contact 22a and the contact 52cc of the movable contact 52c are in contact with each other. Further, the contact 32ac of the output-side fixed contact 32a and the contact 52cd of the movable contact 52c are in contact with each other.

In the ON state, the movable contact 52c is separated from the projection 52b of the contact support 50. As shown in FIG. The contact spring 52s pushes the movable contact 52c toward the input side fixed contact 22a and the output side fixed contact 32a. The contact spring 52s presses the movable contact 52c toward the input-side fixed contact 22a and the output-side fixed contact 32a, thereby pressing the contactor 52cc of the movable contact 52c against the contactor 22ac of the input-side fixed contact 22a with a predetermined force. can be done. Similarly, the contact spring 52s pushes the movable contact 52c toward the input-side fixed contact 22a and the output-side fixed contact 32a, causing the contactor 52cd of the movable contact 52c to move toward the contactor 32ac of the output-side fixed contact 32a with a predetermined force. can be pressed with

In FIGS. 6 and 7, a line EL indicates the position of the lowest portion in the Z-axis direction near the contact support portion 50 of the wall portion 11a. 6 and 7, the positions of the contactor 22ac, the contactor 32ac, the contactor 52cc, and the contactor 52cd are separated from the line EL in the ON state and the OFF state. Therefore, the wall portion 11a can prevent the arc from jumping to an adjacent terminal and short-circuiting.

<Operation of b contact>
51 A of main contacts of the electromagnetic contactor 1 which concerns on this embodiment are b contacts. The operation of the b contact in the electromagnetic contactor 1 according to this embodiment will be described using the main contact 51A. 8 and 9 are diagrams for explaining the contact operation of the b-contact of the electromagnetic contactor 1 according to this embodiment. 8 shows that power is not supplied to the coil terminals 41 and 42 of the magnetic contactor 1 (off state), and FIG. 9 shows that power is supplied to the coil terminals 41 and 42 of the magnetic contactor 1. indicates the case (on state).

The input-side fixed contact 21a of the main contact 51A will be described. The input-side fixed contact 21a includes a contactor 21ac, a plate portion 21a1, a plate portion 21a2, and a plate portion 21a3. The contactor 21ac contacts or separates from the contactor 51cc. The plate portion 21a1 has a plate-like shape extending in the Y-axis direction. The plate portion 21a1 is provided on the −Z side in the Z-axis direction and the +Y side in the Y-axis direction with respect to the plate portion 21a3. A wiring from the outside is connected to the +Y side of the plate portion 21a1, and electric power is supplied from the outside. The plate portion 21a3 has a plate-like shape extending in the Y-axis direction. The plate portion 21a3 has a contactor 21ac on the -Z side surface 21aS. The plate portion 21a2 has a plate-like shape extending in the Z-axis direction. The plate portion 21a2 connects the −Y side end of the plate portion 21a1 and the +Y side end of the plate portion 21a3. Plate portion 21a1 and plate portion 21a3 are electrically connected by plate portion 21a2.

Next, the output-side fixed contact 31a of the main contact 51A will be described. The output-side fixed contact 31a includes a contactor 31ac, a plate portion 31a1, a plate portion 31a2, and a plate portion 31a3. The contactor 31ac contacts or separates from the contactor 51cd. The plate portion 31a1 has a plate-like shape extending in the Y-axis direction. The plate portion 31a1 is provided on the -Z side in the Z-axis direction and the -Y side in the Y-axis direction with respect to the plate portion 31a3. The plate portion 31a1 is connected to wiring from the outside on the -Y side and supplies electric power to the outside. The plate portion 31a3 has a plate-like shape extending in the Y-axis direction. The plate portion 31a3 has a contactor 31ac on the -Z side surface 31aS. The plate portion 31a2 has a plate-like shape extending in the Z-axis direction. The plate portion 31a2 connects the +Y side end of the plate portion 31a1 and the −Y side end of the plate portion 31a3. The plate portion 31a1 and the plate portion 31a3 are electrically connected by the plate portion 31a2.

(off state)
The b-contact is connected in an OFF state, that is, in a state in which power is not supplied to the operating coil 17 of the electromagnetic contactor 1 . Therefore, in the OFF state, that is, in a state in which power is not supplied to the operating coil 17 of the electromagnetic contactor 1, the movable contact 51c is in contact with each of the input side fixed contact 21a and the output side fixed contact 31a. In other words, the contact 21ac of the input-side fixed contact 21a and the contact 51cc of the movable contact 51c are in contact with each other. Further, the contact 31ac of the output-side fixed contact 31a and the contact 51cd of the movable contact 51c are in contact with each other.

In the off state, the movable contact 51c is separated from the protrusion 51a of the contact support 50. As shown in FIG. The contact spring 51s pushes the movable contact 51c toward the input side fixed contact 21a and the output side fixed contact 31a. The contact spring 51s presses the movable contact 51c toward the input-side fixed contact 21a and the output-side fixed contact 31a, thereby pressing the contactor 51cc of the movable contact 51c against the contactor 21ac of the input-side fixed contact 21a with a predetermined force. can be done. Similarly, the contact spring 51s pushes the movable contact 51c toward the input-side fixed contact 21a and the output-side fixed contact 31a, causing the contactor 51cd of the movable contact 51c to move toward the contactor 31ac of the output-side fixed contact 31a with a predetermined force. can be pressed with

(on state)
The b-contact is turned off in the ON state, that is, in the state where power is supplied to the operation coil 17 of the electromagnetic contactor 1 . Therefore, in the ON state, that is, in a state in which power is supplied to the operating coil 17 of the electromagnetic contactor 1, the movable contact 51c is separated from the input side fixed contact 21a and the output side fixed contact 31a. In other words, the contact 21ac of the input-side fixed contact 21a and the contact 51cc of the movable contact 51c are separated. Further, the contactor 31ac of the output-side fixed contact 31a and the contactor 51cd of the movable contact 51c are separated from each other.

In the ON state, the movable contact 51c contacts the protrusion 51a of the contact support 50. As shown in FIG.

In FIGS. 8 and 9, the line EL indicates the position of the lowest portion in the Z-axis direction near the contact support portion 50 of the wall portion 11a (see end portion 11ae in FIG. 3). 8 and 9, the positions of the contactor 21ac, the contactor 31ac, the contactor 51cc, and the contactor 51cd are separated from the line EL in the ON state and the OFF state. Therefore, the wall portion 11a can prevent the arc from jumping to an adjacent terminal and short-circuiting.

<Action/effect>
According to the electromagnetic contactor 1 according to the present embodiment, an electric circuit that supplies power to a load can be provided with an a-contact and a b-contact. Further, according to the electromagnetic contactor 1 according to the present embodiment, it is possible to suppress the influence of the arc generated when the contacts separate from each other on other electric circuits.

Moreover, according to the electromagnetic contactor 1 according to the present embodiment, it is possible to reduce the electrode portions exposed to the outside of the terminals. FIG. 10 is a side view of the electromagnetic contactor 1 according to this embodiment, viewed from the output terminal side. According to the electromagnetic contactor 1 according to the present embodiment, for example, the portions of the output-side fixed contact 31a, the output-side fixed contact 32a, the output-side fixed contact 33a, and the output-side fixed contact 36a exposed to the outside can be reduced. .

For example, as in the contact device disclosed in Patent Document 3, if the stationary contact is formed in a U shape, the contact is inside the U shape. It is necessary to perform the step of bending again. Therefore, the number of manufacturing steps increases, and the manufacturing cost increases. In addition, since the U-shaped bent portion is exposed to the outside, the portion of the terminal portion exposed to the outside increases.

According to the electromagnetic contactor 1 according to the present embodiment, since the input-side fixed contact 21a and the output-side fixed contact 31a can be connected to the contacts after bending, the number of manufacturing processes can be reduced, and the manufacturing cost can be reduced. Moreover, since the electromagnetic contactor 1 does not have a bent portion on the U-shaped side, the portion exposed to the outside can be reduced (see FIG. 10).

Further, according to the electromagnetic contactor 1 according to the present embodiment, since the protrusions are provided on both sides in the Z direction of the window portion of the contact support portion 50, for example, the protrusions 51a and 51b on the window portion 51h, By using one protrusion for fixing the contact spring, the number of spring receivers can be reduced.

Furthermore, for example, conventionally, a window for the a-contact and a window for the b-contact were required, but according to the electromagnetic contactor 1 according to the present embodiment, the same window of the contact support 50 can Since both a-contacts and b-contacts can be realized, the number of windows can be reduced. By reducing the number of windows, the strength of the contact support portion 50 can be increased.

Note that the Z-axis direction is an example of the first direction, the Y-axis direction is an example of a second direction intersecting the first direction, the -Z side is an example of the first side, the +Z side is an example of the second side, and the +Y side is the third side. An example is the -Y side is an example of the fourth side. Further, the window 51h is an example of the first window, the projection 51a is an example of the first projection, the projection 51b is an example of the second projection, the window 52h is an example of the second window, and the projection 52a is An example of the third protrusion, and the protrusion 52b is an example of the fourth protrusion. Further, the contact spring 51s is an example of a first contact spring, the contact spring 52s is an example of a second contact spring, the spring receiver 51r is an example of a first spring receiver, and the spring receiver 52r is an example of a second spring receiver.

The movable contact 51c is an example of the first movable contact, the horizontal plate portion 51c2 is an example of the first plate portion, the contactor 51cc is an example of the first contactor, the horizontal plate portion 51c3 is an example of the second plate portion, and the contactor 51cd is It is an example of a second contact. The input-side fixed contact 21a is an example of a first fixed contact, the contactor 21ac is an example of a third contactor, the plate portion 21a3 is an example of a third plate portion, and the plate portion 21a1 is an example of a fourth plate portion. The output side fixed contact 31a is an example of the second fixed contact, the contactor 31ac is an example of the fourth contactor, the plate portion 31a3 is an example of the fifth plate portion, and the plate portion 31a1 is an example of the sixth plate portion.

The movable contact 52c is an example of a second movable contact, the horizontal plate portion 52c2 is an example of a seventh plate portion, the contactor 52cc is an example of a fifth contactor, the horizontal plate portion 52c3 is an example of an eighth plate portion, and 52cd is an example of a sixth plate portion. It is an example of a contactor. The input-side fixed contact 22a is an example of a third fixed contact, the contactor 22ac is an example of a seventh contactor, and the plate portion 22a1 is an example of a ninth plate portion. The output-side fixed contact 32a is an example of a fourth fixed contact, the contactor 32ac is an example of an eighth contactor, and the plate portion 32a1 is an example of a tenth plate portion.

It should be noted that the embodiments disclosed this time should be considered as examples and not restrictive in all respects. The embodiments described above may be omitted, substituted, or modified in various ways without departing from the scope and spirit of the appended claims.

For example, according to the electromagnetic contactor 1 according to the present embodiment, the main contact has two a-contacts and one b-contact, but the number of a-contacts and the number of b-contacts are not limited to the above and can be selected as appropriate. You may Also, which contact should be the a-contact or which should be the b-contact may be selected as appropriate. Furthermore, the main contact may be only the a-contact, or the main contact may be only the b-contact.

1 electromagnetic contactor 11 upper housing 11a wall portion 12 lower housing 21, 22, 23 input terminals 21a, 22a, 23a input side fixed contacts 21ac, 22ac contacts 21a1, 21a3 plate portions 31, 32, 33 output terminal 31a, 32a, 33a output-side fixed contacts 31ac, 32ac contacts 31a1, 31a3 plate portions 41, 42 coil terminals 50 contact support portions 51A, 52A, 53A main contacts 51a, 51b, 52a, 52b, 53a, 53b projections 51c, 52c, 53c movable contacts 51cc, 51cd, 52cc, 52cd contacts 51h, 52h, 53h windows 51c2, 51c3, 52c2, 52c3 horizontal plate portions 51p, 52p, 53p guide portions 51r, 52r, 53r spring receivers 51s, 52s contact springs 56A auxiliary contact

Claims (8)

a fixed electromagnet;
an operating coil;
a movable electromagnet;
It is fixed to the movable electromagnet, and when power is supplied to the operating coil, it is attracted to the fixed electromagnet together with the movable electromagnet and moves to the first side in the first direction. A first window portion and a second window that move away from the fixed electromagnet together with the movable electromagnet and move to a second side opposite to the first side in the first direction and penetrate in a second direction that intersects with the first direction. a contact support having a portion;
a first plate portion installed in the first window portion and extending to the third side in the second direction with respect to the first window portion; and a first contact fixed to the second side of the first plate portion. a second plate portion extending to a fourth side opposite to the third side in the second direction with respect to the first window portion; and a second plate portion fixed to the second side of the second plate portion. a first movable contact comprising two contacts;
a first contact spring compressed in the first direction, having the first side end fixed to the first side end of the first window portion, and having the second side end pressing the first movable contact; ,
a third contact in contact with or separated from the first contact; a third plate portion including the third contact on the first side; electrically connected to the third plate; a first fixed contact comprising a fourth plate portion provided on the first side and the third side from the portion and connected to an external wiring;
a fourth contact contacting or separated from the second contact; a fifth plate portion including the fourth contact on the first side; electrically connected to the fifth plate portion; a second fixed contact comprising a sixth plate portion provided on the first side and the fourth side from the portion and connected to an external wiring;
a seventh plate portion installed in the second window portion and extending toward the third side in the second direction with respect to the second window portion; and a fifth plate portion fixed to the first side of the seventh plate portion. a contact, an eighth plate extending toward the fourth side in the second direction with respect to the second window, and a sixth contact fixed to the first side of the eighth plate a second movable contact;
a second contact spring that is compressed in the first direction, has the second side end fixed to the second side end of the second window portion, and has the first side end pressing the second movable contact; ,
a seventh contact that contacts or separates from the fifth contact; a seventh contact that extends in the second direction; a third fixed contact comprising a ninth plate portion to which the wiring of
an eighth contact that is in contact with or separated from the sixth contact; a fourth fixed contact comprising an eighth plate portion to which the wiring of
comprising
electromagnetic contactor. The shape of the second movable contact is the same as the shape of the first movable contact,
The electromagnetic contactor according to claim 1. The first window further includes a first protrusion and a second protrusion at both ends in the first direction,
the first protrusion contacts the first movable contact when the contact support moves to the first side;
wherein the second projection fixes the first side end of the first contact spring;
The electromagnetic contactor according to claim 1 or 2. the second window further includes a third protrusion and a fourth protrusion at both ends in the first direction;
the third projection fixing the second side end of the second contact spring;
The fourth protrusion contacts the second movable contact when the contact support moves to the second side.
The electromagnetic contactor according to claim 1 or 2. The first window further includes a first protrusion and a second protrusion at both ends in the first direction,
the second window further includes a third protrusion and a fourth protrusion at both ends in the first direction;
the first protrusion contacts the first movable contact when the contact support moves to the first side;
the second projection fixing the first side end of the first contact spring;
the third projection fixing the second side end of the second contact spring;
The fourth protrusion contacts the second movable contact when the contact support moves to the second side.
The electromagnetic contactor according to claim 1 or 2. further comprising a first spring receiver between the first movable contact and the first contact spring;
The magnetic contactor according to any one of claims 1 to 5. A second spring receiver is further provided between the second movable contact and the second contact spring,
The electromagnetic contactor according to any one of claims 1 to 5. a first spring receiver between the first movable contact and the first contact spring;
a second spring receiver between the second movable contact and the second contact spring;
The shape of the second spring receiver is the same as the shape of the first spring receiver,
The magnetic contactor according to any one of claims 1 to 5.

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