WO2021106673A1 - Electromagnetic relay - Google Patents

Abstract

This electromagnetic relay comprises: an excitation coil; a mobile iron core; a fixed contact; a mobile contactor; a supplementary fixed contact; and a supplementary mobile contact. The supplementary fixed contact and the supplementary mobile contact: are disposed in a region that, seen from above, is surrounded by the excitation coil; and are positioned so as to be below the upper end of the excitation coil.

Description

Electromagnetic relay

The present disclosure generally relates to an electromagnetic relay, and more particularly to an electromagnetic relay having an auxiliary contact that opens and closes in conjunction with the opening and closing of the contact.

The electromagnetic contactor (electromagnetic relay) described in Patent Document 1 includes a main contact mechanism, an auxiliary contact mechanism, and an electromagnet unit. In the main contact mechanism, the main movable contacts are arranged so that they can be brought into contact with and separated from a pair of main fixed contacts. In the auxiliary contact mechanism, an auxiliary movable contact that interlocks with the main movable contact is arranged so as to be able to connect to and separate from a pair of auxiliary fixed contacts. The electromagnet unit drives the main contact mechanism and the auxiliary contact mechanism.

Japanese Unexamined Patent Publication No. 2019-096513

The electromagnetic relay according to one aspect of the present disclosure includes an exciting coil, a movable iron core which is arranged so as to be surrounded by the exciting coil and moves in the vertical direction according to a change in the energized state of the exciting coil, and a movable contact. A movable contact that is provided and moves in the vertical direction in conjunction with the movable iron core, and a fixed contact that contacts or separates from the movable contact in conjunction with the movement of the movable contact, and the excitation when viewed from above. The first auxiliary fixed contact arranged in the area surrounded by the coil and the first auxiliary fixed contact move in conjunction with the movable iron core, and (1) when the movable contact is in contact with the fixed contact, the first auxiliary fixed contact. When the movable contact is separated from the fixed contact, it comes into contact with the first auxiliary fixed contact, or (2) when the movable contact is separated from the fixed contact, it is separated from the first auxiliary fixed contact. A first auxiliary movable contact that comes into contact with the first auxiliary fixed contact when the movable contact is in contact with the fixed contact. The movable contact is arranged above the exciting coil, and the first auxiliary fixed contact and the first auxiliary movable contact are arranged in a region surrounded by the exciting coil when viewed from above, and the exciting. It is located below the top of the coil.

FIG. 1 is a cross-sectional view of the electromagnetic relay according to the embodiment when the exciting coil is energized. FIG. 2 is a cross-sectional view of the above-mentioned electromagnetic relay when the exciting coil is not energized. FIG. 3 is a perspective view of a main part of the electromagnetic relay as described above. FIG. 4 is a cross-sectional view of a main part of the electromagnetic relay as described above. FIG. 5A is a cross-sectional view of a main part of the electromagnetic relay according to the first modification when the exciting coil is energized. FIG. 5B is a cross-sectional view of a main part of the above-mentioned electromagnetic relay when the exciting coil is not energized. FIG. 6 is a perspective view of a main part of the electromagnetic relay as described above. FIG. 7A is a side view of a main part of the electromagnetic relay according to the second modification when the exciting coil is energized. FIG. 7B is a side view of a main part of the above-mentioned electromagnetic relay when the exciting coil is not energized. FIG. 8 is a perspective view of a main part of the electromagnetic relay as described above. FIG. 9A is a perspective view of a main part of the electromagnetic relay according to the third modification when the exciting coil is energized. FIG. 9B is a perspective view of a main part of the above-mentioned electromagnetic relay when the exciting coil is not energized. FIG. 10A is a cross-sectional view of a main part of the electromagnetic relay according to the modified example 4 when the exciting coil is energized. FIG. 10B is a cross-sectional view of a main part of the above-mentioned electromagnetic relay when the exciting coil is not energized. FIG. 11A is a cross-sectional view of a main part of the electromagnetic relay according to the modified example 7 when the exciting coil is energized. FIG. 11B is a cross-sectional view of a main part of the above-mentioned electromagnetic relay when the exciting coil is not energized. FIG. 12A is a cross-sectional view of a main part of the electromagnetic relay according to the modified example 8 when the exciting coil is energized. FIG. 12B is a cross-sectional view of a main part of the above-mentioned electromagnetic relay when the exciting coil is not energized. FIG. 13A is a cross-sectional view of a main part of the electromagnetic relay according to the modified example 9 when the exciting coil is energized. FIG. 13B is a cross-sectional view of a main part of the above-mentioned electromagnetic relay when the exciting coil is not energized.

(Embodiment)
Hereinafter, the electromagnetic relay 1 according to the embodiment will be described with reference to the drawings. However, the following embodiments are only one of the various embodiments of the present disclosure. The following embodiments can be variously modified according to the design and the like as long as the object of the present disclosure can be achieved. Further, each figure described in the following embodiment is a schematic view, and the ratio of the size and the thickness of each component in the figure does not necessarily reflect the actual dimensional ratio. ..

(1) Overview In the present specification, a set of one or more fixed contacts 211 and one or more movable contacts 222 may be referred to as a main contact. Further, a set of one or more auxiliary fixed contacts 71 and one or more auxiliary movable contacts 81 may be referred to as an auxiliary contact.

As shown in FIG. 1, the electromagnetic relay 1 of the present embodiment includes an exciting coil 51, a movable iron core 53, a fixed contact 211, a movable contact 22, an auxiliary fixed contact 71, an auxiliary movable contact 81, and the like. To be equipped. The movable iron core 53 moves in the orbital direction (vertical direction) according to a change in the energized state of the exciting coil 51. The orbital direction is a direction along the axial direction of the exciting coil 51. The movable contact 22 has a movable contact 222. The movable contact 22 moves in conjunction with the movement of the movable iron core 53 so that the position of the movable contact 222 is between the first closed position where the movable contact 222 is in contact with the fixed contact 211 and the first open position where the movable contact 222 is separated from the fixed contact 211. Switch with. The auxiliary movable contact 81 moves in conjunction with the movement of the movable iron core 53, so that the auxiliary fixed contact 71 can be used in either the first closed position or the first open position of the movable contact 222. It is in the second closed position in contact with, and on the other hand, in the second open position away from the auxiliary fixed contact 71. The exciting coil 51 and the movable contact 22 are aligned in the orbital direction. At least a part of each of the auxiliary fixed contact 71 and the auxiliary movable contact 81 when in the second open position has the inner peripheral surface 510 of the exciting coil 51 and the inner peripheral surface 510 with the movable contact 22 side. Is arranged in a region R1 (see FIG. 4) surrounded by a virtual surface 511 (see FIG. 4) extending in the orbital direction to the opposite side.

According to this embodiment, it is possible to provide an electromagnetic relay 1 whose structure can be easily simplified. For example, when the auxiliary contacts (auxiliary fixed contact 71 and auxiliary movable contact 81) are arranged on the movable contact 22 side when viewed from the exciting coil 51, the main contact (fixed contact 211 and movable contact 222) and the auxiliary contact are electrically connected. The structure for insulation can be complicated. Further, when the auxiliary contact is arranged outside the exciting coil 51 when viewed from the axial direction of the exciting coil 51, for example, a structure (positioning structure, connection structure, etc.) that forms a mutual relationship between the exciting coil 51, the movable iron core 53, and the auxiliary contact is formed. ) May be complicated. Compared to this, by arranging at least a part of each of the auxiliary fixed contact 71 and the auxiliary movable contact 81 constituting the auxiliary contact in the region R1, the structure of the electromagnetic relay 1 can be simplified.

(2) Basic Configuration As shown in FIG. 1, the electromagnetic relay 1 of the present embodiment includes two fixed contacts 211 and two movable contacts 222. The two fixed contacts 211 have a one-to-one correspondence with the two movable contacts 222. Each fixed contact 211 is arranged to face the corresponding movable contact 222.

In the present specification, the direction in which each fixed contact 211 and the corresponding movable contact 222 are lined up is defined as the vertical direction, the fixed contact 211 side as viewed from the movable contact 222 is defined as the top, and the fixed contact 211 is viewed from the fixed contact 211. The movable contact 222 side is defined as the bottom. Further, in the electromagnetic relay 1, the direction in which the two fixed contacts 211 are lined up is defined as the left-right direction. Further, the direction orthogonal to both the vertical direction and the horizontal direction is defined as the front-rear direction. However, these directions are not intended to limit the direction in which the electromagnetic relay 1 is used.

The electromagnetic relay 1 is provided in, for example, an electric vehicle. The electromagnetic relay 1 switches, for example, whether or not a current is supplied from a power source of an electric vehicle to a load (motor or the like).

The electromagnetic relay 1 includes an exciting coil 51, a coil bobbin 52, a case 6, a movable iron core 53, a relay 54, a return spring 55, a shaft 56, and a bush 57. Further, the electromagnetic relay 1 includes a pair of coil terminals electrically connected to both ends of the exciting coil 51. Each coil terminal is formed of a conductive material such as copper and is electrically connected to a lead wire by soldering or the like. The exciting coil 51 receives an electric current from a control circuit provided outside the electromagnetic relay 1 via a lead wire.

The coil bobbin 52 is formed of a resin or the like as a material. The coil bobbin 52 has two flange portions 521 and 522 and a shaft portion 523. The shape of the shaft portion 523 is tubular (preferably cylindrical). The axial direction of the shaft portion 523 is along the vertical direction. An exciting coil 51 is wound around the shaft portion 523. As a result, the exciting coil 51 has a tubular shape (preferably a cylindrical shape). The collar portion 521 extends outward from the upper end of the shaft portion 523 in the radial direction of the shaft portion 523. The collar portion 522 extends outward from the lower end of the shaft portion 523 in the radial direction of the shaft portion 523.

The joint iron 54 is made of a magnetic material. The joint iron 54 forms at least a part of a magnetic circuit through which the magnetic flux generated in the exciting coil 51 passes when the exciting coil 51 is energized. The joint iron 54 includes a first joint iron 541, a second joint iron 542, and a pair of third joint irons 543.

The shape of the first joint iron 541 is a rectangular plate shape. The first joint iron 541 covers the coil bobbin 52 from above. The first joint iron 541 is in contact with the upper surface of the coil bobbin 52. A first insertion hole 544 is formed at substantially the center of the first joint iron 541. A shaft 56 is passed through the first insertion hole 544.

The shape of the second joint iron 542 is a rectangular plate shape. The second joint iron 542 covers the coil bobbin 52 from below. The second joint iron 542 is in contact with the lower surface of the coil bobbin 52. A second insertion hole 545 is formed at substantially the center of the second joint iron 542.

The pair of third joint irons 543 constitutes the right side surface and the left side surface of the joint iron 54. That is, the pair of third joint irons 543 extend upward from both left and right ends of the second joint iron 542 to the first joint iron 541. The exciting coil 51 is arranged between the pair of third joint irons 543.

The bush 57 is made of a magnetic material. The shape of the bush 57 is tubular (preferably cylindrical). The bush 57 extends upward from a region of the second joint iron 542 along the inner edge of the second insertion hole 545. The bush 57, together with the joint iron 54 and the movable iron core 53, forms a magnetic circuit through which the magnetic flux generated when the exciting coil 51 is energized passes. The bush 57 is arranged inside the coil bobbin 52. A case 6 is arranged inside the bush 57.

The shape of the case 6 is a bottomed cylinder with an open upper end (preferably a bottomed cylinder). The case 6 has a base 61, an outer cylinder portion 62, and a guide portion 63. The bottom of the case 6 is referred to as a base 61 in the present disclosure.

The base 61 is formed of, for example, ceramic as a material. The base 61 has electrical insulation. The shape of the base 61 is a disk shape.

The outer cylinder portion 62 is, for example, a non-magnetic material. The outer cylinder portion 62 is formed of, for example, a metal material. A specific example of the material of the outer cylinder portion 62 is 42 alloy.

The shape of the outer cylinder portion 62 is tubular (preferably cylindrical). The axial direction of the outer cylinder portion 62 is along the vertical direction. The base 61 is fixed to one end (lower end) of the outer cylinder portion 62. The base 61 and the outer cylinder portion 62 are connected by, for example, brazing. The base 61 covers one end (lower end) of the outer cylinder portion 62.

The collar portion 621, which is the upper end portion of the outer cylinder portion 62, extends outward in the radial direction of the outer cylinder portion 62. That is, the outer cylinder portion 62 has a collar portion 621. The shape of the collar portion 621 is an annular shape.

The guide portion 63 is formed of, for example, metal. The shape of the guide portion 63 is tubular (preferably cylindrical). The axial direction of the guide portion 63 is along the vertical direction.

The outer flange portion 631, which is the upper end portion of the guide portion 63, extends outward in the radial direction of the guide portion 63. The inner flange portion 632, which is the lower end portion of the guide portion 63, extends inward in the radial direction of the guide portion 63. That is, the guide portion 63 has an outer collar portion 631 and an inner collar portion 632. The outer flange portion 631 and the inner flange portion 632 have an annular shape.

The guide portion 63 is fixed to the lower surface of the first joint iron 541 at the upper end portion (outer collar portion 631). The guide portion 63 and the first joint iron 541 are connected by welding, for example. Further, the guide portion 63 is fixed to the upper end portion (flange portion 621) of the outer cylinder portion 62 at the lower end portion (inner collar portion 632). The guide portion 63 and the outer cylinder portion 62 are connected by welding, for example.

The upper surface of the case 6 is sealed by a first joint iron 541 and a shaft 56 passed through a first insertion hole 544 of the first joint iron 541. The lower surface of the case 6 is sealed by the base 61. Therefore, the internal space 600 of the case 6 is a sealing space. In other words, the interior space 600 is hermetically sealed. An arc-extinguishing gas such as hydrogen is sealed in the internal space 600. The internal space 600 does not have to be sealed and may be connected to the external environment.

The movable iron core 53 is made of a magnetic material. The shape of the movable iron core 53 is tubular (preferably cylindrical). The axial direction of the movable iron core 53 is along the vertical direction. The movable iron core 53 is housed in the case 6. More specifically, the movable iron core 53 is arranged inside the guide portion 63 of the case 6. The outer diameter of the movable iron core 53 is substantially equal to the inner diameter of the guide portion 63. Therefore, the movement of the movable iron core 53 in a direction other than the vertical direction is restricted by the guide portion 63. A columnar shaft 56 is passed through the inside of the movable iron core 53. The shaft 56 is fixed to the movable iron core 53. The movable iron core 53 is formed with a recess 531 recessed downward from the upper surface thereof.

The return spring 55 is, for example, a compression coil spring. The first end of the return spring 55 in the expansion / contraction direction (vertical direction) is fixed to the first joint iron 541, and the second end opposite to the first end is the bottom surface of the recess 531 of the movable iron core 53. It is fixed to. More specifically, the return spring 55 is fixed by being sandwiched between the first joint iron 541 and the bottom surface of the recess 531. The return spring 55 applies an elastic force to the movable iron core 53 to move the movable iron core 53 downward.

The joint iron 54, the bush 57, and the movable iron core 53 form a magnetic circuit. When the exciting coil 51 is energized, the magnetic flux generated by the exciting coil 51 passes through the magnetic circuit, so that the movable iron core 53 moves so that the magnetic resistance of the magnetic circuit becomes small. Specifically, when the exciting coil 51 is energized while the exciting coil 51 is not energized as shown in FIG. 2, the gap between the first joint iron 541 and the upper end of the movable iron core 53 is filled. , The movable iron core 53 moves upward. More specifically, the electromagnetic force for moving the movable iron core 53 upward exceeds the force (elastic force) for the return spring 55 to push the movable iron core 53 downward, so that the movable iron core 53 moves upward. To do. That is, the movable iron core 53 moves to the position shown in FIG.

When the exciting coil 51 is energized to not energized, the electromagnetic force that moves the movable iron core 53 upward disappears, so that the movable iron core 53 is moved downward by the elastic force of the return spring 55. Moving. That is, it returns to the state of FIG.

As described above, the movable iron core 53 is directed in the axial direction (vertical direction) of the exciting coil 51 by the electromagnetic force and the elastic force of the return spring 55 in response to the change in the energized state of the exciting coil 51. Move to.

The electromagnetic relay 1 includes two fixed terminals 21, two fixed contacts 211, a movable contact 22, a first pressure spring 23, a holder 24, a contact accommodating portion 41, and a connecting body 42. I have. The contact accommodating portion 41 accommodates two fixed contacts 211, a movable contact 22 and the like. Further, the electromagnetic relay 1 includes a housing for accommodating the contact accommodating portion 41, the relay iron 54, and the like. The housing is airtight.

Each of the two fixed terminals 21 is formed of a conductive material such as copper. The shape of each fixed terminal 21 is cylindrical. The contact accommodating portion 41 has two through holes 411, and each of the two fixed terminals 21 is inserted into the corresponding through holes 411. Each fixed terminal 21 is fixed to the contact accommodating portion 41 by brazing or the like with its upper end protruding from the upper surface of the contact accommodating portion 41.

The two fixed terminals 21 have a one-to-one correspondence with the two fixed contacts 211. A corresponding fixed contact 211 is attached to the lower end of each fixed terminal 21. It should be noted that each fixed contact 211 and a portion of the fixed terminal 21 other than the fixed contact 211 may be composed of one member.

The movable contact 22 is arranged above the exciting coil 51. That is, the exciting coil 51 and the movable contact 22 are arranged in the vertical direction. The movable contact 22 is formed in a flat plate shape having a thickness in the vertical direction. When viewed from the vertical direction, the horizontal dimension of the movable contact 22 is longer than the front-rear dimension. The movable contact 22 has two movable contacts 222. The two movable contacts 222 are provided at both ends in the left-right direction of the upper surface of the movable contact 22. The two movable contacts 222 have a one-to-one correspondence with the two fixed contacts 211. Each movable contact 222 faces a corresponding fixed contact 211. The facing direction of each fixed contact 211 and the corresponding movable contact 222 is along the vertical direction. In the present embodiment, the two movable contacts 222 and the parts of the movable contacts 22 other than the two movable contacts 222 are composed of one member, but may be composed of a plurality of members.

The holder 24 has an upper wall 241, a lower wall 242, and a connecting wall 243. The upper wall 241 and the lower wall 242 are arranged in the vertical direction. The connecting wall 243 connects the upper wall 241 and the lower wall 242. A movable contact 22 is passed between the upper wall 241 and the lower wall 242.

The first pressure contact spring 23 is, for example, a compression coil spring. The first end of the first pressure spring 23 in the expansion / contraction direction (vertical direction) is fixed to the movable contactor 22, and the second end opposite to the first end is attached to the lower wall 242 of the holder 24. It is fixed. More specifically, the first pressure spring 23 is fixed by being sandwiched between the movable contact 22 and the lower wall 242. The first pressure spring 23 applies an upward elastic force to the movable contact 22. That is, the first pressure spring 23 applies an elastic force in a direction approaching the two fixed contacts 211 to the movable contact 22.

The shape of the shaft 56 is a round bar. The axial direction of the shaft 56 is along the vertical direction. The upper end of the shaft 56 is fixed to the holder 24. The shaft 56 is connected to the movable contact 22 via the holder 24. The shaft 56 is fixed to the movable iron core 53. A part of the shaft 56 projects downward from the lower surface of the movable iron core 53.

The contact accommodating portion 41 is formed of a heat-resistant material such as ceramic. The shape of the contact accommodating portion 41 is a box shape with an open lower surface. Two through holes 411 arranged in the left-right direction are formed on the upper surface of the contact accommodating portion 41. The space inside the contact accommodating portion 41 is an accommodating chamber 410 in which two fixed contacts 211 and two movable contacts 222 are arranged. The lower surface of the containment chamber 410 is sealed by a first joint iron 541. Therefore, the storage chamber 410 is a sealing space. In other words, the containment chamber 410 is hermetically sealed. The containment chamber 410 is filled with an arc-extinguishing gas such as hydrogen. The storage chamber 410 does not have to be sealed and may be connected to the external environment.

The shape of the connecting body 42 is a rectangular frame shape. The connecting body 42 is fixed to the contact accommodating portion 41 by brazing or the like. Further, the connecting body 42 is fixed to the first joint iron 541 by brazing or the like. As a result, the connecting body 42 connects the contact accommodating portion 41 and the first joint iron 541.

Since the movable iron core 53 moves in the vertical direction according to the change in the energized state of the exciting coil 51, the shaft 56 connected to the movable iron core 53 moves in the vertical direction. Along with this, the holder 24 and the movable contact 22 move in the vertical direction. That is, the movable contact 22 moves in the opposite direction (vertical direction) of each fixed contact 211 and each movable contact 222. Therefore, the position of each movable contact 222 is switched between the first closed position and the first open position according to the change in the energized state of the exciting coil 51. In the first closed position, each movable contact 222 contacts the corresponding fixed contact 211. When the position of each movable contact 222 is the first closed position, the two fixed contacts 211 are electrically connected. On the other hand, in the first open position, each movable contact 222 is separated from the corresponding fixed contact 211. When the position of each movable contact 222 is the first open position, there is no conduction between the two fixed contacts 211.

In the present embodiment, each movable contact 222 is in the first open position when the exciting coil 51 is not energized. Further, each movable contact 222 is in the first closed position when the exciting coil 51 is energized. That is, the main contact of the electromagnetic relay 1 is the a contact.

(3) Configuration of Auxiliary Contact Next, the configuration of the auxiliary contact will be described with reference to FIGS. 1 to 3.

The electromagnetic relay 1 includes two auxiliary fixed contacts 71 and two auxiliary movable contacts 81. That is, the electromagnetic relay 1 includes an auxiliary contact including two auxiliary fixed contacts 71 and two auxiliary movable contacts 81. The main contacts (two fixed contacts 211 and two movable contacts 222) form an electric circuit for power supply, while the auxiliary contacts form an electric circuit for signal transmission.

The electromagnetic relay 1 includes two terminals 70. The shape of each of the two terminals 70 is rod-shaped. Each of the two terminals 70 has a length in the vertical direction. The upper end of each of the two terminals 70 functions as an auxiliary fixed contact 71. That is, the two terminals 70 and the two auxiliary fixed contacts 71 have a one-to-one correspondence, and each terminal 70 has a corresponding auxiliary fixed contact 71. However, each terminal 70 and the corresponding auxiliary fixed contact 71 may be formed separately.

Each of the two terminals 70 is electrically connected to the corresponding auxiliary fixed contact 71. Here, the fact that the terminal 70 and the auxiliary fixed contact 71 are electrically connected includes an embodiment in which the terminal 70 and the auxiliary fixed contact 71 are composed of one member as in the present embodiment.

Each of the two terminals 70 is fixed to the base 61. More specifically, each of the two terminals 70 penetrates the base 61 in the vertical direction. Further, each of the two terminals 70 is fixed to the base 61 by brazing, for example.

The electromagnetic relay 1 includes an auxiliary movable contact 80. The auxiliary movable contact 80 is formed in a flat plate shape having a thickness in the vertical direction. More specifically, the shape of the auxiliary movable contact 80 is a disk shape. The auxiliary movable contact 80 includes two auxiliary movable contacts 81. The two auxiliary movable contacts 81 are provided on the lower surface of the auxiliary movable contact 80. The two auxiliary movable contacts 81 have a one-to-one correspondence with the two auxiliary fixed contacts 71. Each auxiliary movable contact 81 faces the corresponding auxiliary fixed contact 71. More specifically, each auxiliary movable contact 81 faces the corresponding auxiliary fixed contact 71 in the vertical direction.

Of the lower surface of the auxiliary movable contact 80, two regions facing the two auxiliary fixed contacts 71 each function as the auxiliary movable contact 81. In the present embodiment, the two auxiliary movable contacts 81 and the parts of the auxiliary movable contacts 80 other than the two auxiliary movable contacts 81 are composed of one member, but are composed of a plurality of members. May be good.

An insertion hole 802 is formed in the auxiliary movable contact 80. A shaft 56 is passed through the insertion hole 802. The auxiliary movable contact 80 can move in the vertical direction with respect to the shaft 56.

The electromagnetic relay 1 includes a regulating member 82 and a second pressure contact spring 83 (pressure contact spring portion). The shape of the regulating member 82 is an annular shape. The shaft 56 is passed through the central hole of the regulating member 82. The regulating member 82 is fixed to the shaft 56. The auxiliary movable contact 80 is placed on the upper surface of the regulating member 82. As a result, the auxiliary movable contact 80 is restricted from moving below the regulating member 82.

The second pressure contact spring 83 is, for example, a compression coil spring. The first end of the second pressure spring 83 in the expansion / contraction direction (vertical direction) is fixed to the movable iron core 53, and the second end opposite to the first end is fixed to the auxiliary movable contact 80. Has been done. More specifically, the second pressure contact spring 83 is fixed by being sandwiched between the movable iron core 53 and the auxiliary movable contact 80. The second pressure spring 83 applies a downward elastic force to the auxiliary movable contact 80. That is, the second pressure contact spring 83 applies an elastic force in a direction approaching the two auxiliary fixed contacts 71 to the auxiliary movable contact 80. As a result, the contact pressure between each of the two auxiliary movable contacts 81 and the corresponding auxiliary fixed contact 71 is secured.

The auxiliary movable contact 80 (two auxiliary movable contacts 81) moves in conjunction with the movement of the movable iron core 53. That is, when the movable iron core 53 moves in the vertical direction, the auxiliary movable contact 80 also moves in the vertical direction.

When the exciting coil 51 is energized (see FIG. 1) and is not energized, the movable iron core 53 moves downward due to the elastic force of the return spring 55, so that the auxiliary movable contact 80 also moves downward. Moving. As a result, each of the two auxiliary movable contacts 81 moves to the second closed position. As shown in FIG. 2, in the second closed position, each of the two auxiliary movable contacts 81 contacts the corresponding auxiliary fixed contact 71. When the position of each auxiliary movable contact 81 is the second closed position, the two auxiliary fixed contacts 71 are electrically connected to each other.

When the exciting coil 51 is energized from the non-energized state (see FIG. 2), the movable iron core 53 moves upward due to the electromagnetic force, so that the auxiliary movable contact 80 also moves upward. As a result, each of the two auxiliary movable contacts 81 moves to the second open position. As shown in FIG. 1, in the second open position, each of the two auxiliary movable contacts 81 is separated from the corresponding auxiliary fixed contact 71. When the position of each auxiliary movable contact 81 is the second open position, there is no conduction between the two auxiliary fixed contacts 71.

As shown in FIG. 1, when the two movable contacts 222 are in the first closed position, the two auxiliary movable contacts 81 are in the second open position. As shown in FIG. 2, when the two movable contacts 222 are in the first open position, the two auxiliary movable contacts 81 are in the second closed position.

As shown in FIG. 1, when the two auxiliary movable contacts 81 are in the second open position, the movable contactor 22, the movable iron core 53, the two auxiliary movable contacts 81, and the two auxiliary fixed contacts 71 are moved up and down in this order. Lined up in the direction.

In the internal space 600 of the case 6, a movable iron core 53, two auxiliary fixed contacts 71, and an auxiliary movable contact 81 when in the second open position are arranged.

The auxiliary movable contact 80 (two auxiliary movable contacts 81) is integrated with the movable iron core 53 by being connected to the movable iron core 53 via the shaft 56 and the regulating member 82. In the present disclosure, "integral" means that a plurality of configurations are mechanically connected, or a plurality of configurations are composed of one member. When a plurality of configurations are "integrated", the plurality of configurations may be in a state in which the positional relationship with each other cannot be changed, or the plurality of configurations can change the positional relationship with each other within a certain range. It may be in a state. In the present embodiment, the auxiliary movable contact 80 is mechanically connected to the movable iron core 53 in a state in which the positional relationship with the movable iron core 53 can be changed within a certain range. That is, as shown in FIG. 2, when the auxiliary movable contact 80 receives the normal force from the two auxiliary fixed contacts 71, the second pressure spring 83 is compressed, so that the auxiliary movable contact 80 and the movable iron core 53 are compressed. The distance between and is shortened.

FIG. 4 illustrates the configuration of the main part of the electromagnetic relay 1 when the two auxiliary movable contacts 81 are in the second open position. In FIG. 4, the illustration of a part of the configuration of the electromagnetic relay 1 is omitted. The two auxiliary fixed contacts 71 and the two auxiliary movable contacts 81 extend the inner peripheral surface 510 and the inner peripheral surface 510 of the exciting coil 51 in the vertical direction opposite to the movable contact 22 side (lower side). It is arranged in the area R1 surrounded by the virtual surface 511. In other words, the two auxiliary fixed contacts 71 and the two auxiliary movable contacts 81 when in the second open position are the area R10 surrounded by the inner peripheral surface 510 and the area R11 surrounded by the virtual surface 511. And are arranged in the combined area R1. The shape of the virtual surface 511 is a cylindrical side surface. Regions R10 and R11 are columnar regions, respectively.

Further, at least a part of the movable iron core 53 (in the present embodiment, the entire movable iron core 53) is also arranged in the region R1 when the exciting coil 51 is energized and de-energized. At least a part of the movable iron core 53, two auxiliary fixed contacts 71 (upper surface of the terminal 70), and two auxiliary movable contacts 81 (lower surface of the auxiliary movable contact 80) are formed on the inner peripheral surface 510 of the exciting coil 51. It is arranged in the enclosed area R10.

By arranging the auxiliary contact and the movable iron core 53 in this way, the structure of the electromagnetic relay 1 can be simplified as described above. For example, when the auxiliary contact is arranged outside the exciting coil 51 when viewed from the axial direction of the exciting coil 51, a structure (positioning structure, connection structure, etc.) that forms a mutual relationship between the exciting coil 51, the movable iron core 53, and the auxiliary contact is formed. Although it may be complicated, this can be suppressed by the present embodiment. Further, since the auxiliary contact and the movable iron core 53 are integrated in the region R1 (or R10), the electromagnetic relay 1 can be made compact. For example, it is possible to prevent the size of the electromagnetic relay 1 from becoming larger than when there is no auxiliary contact.

(4) Operation Example Here, an operation example of the electromagnetic relay 1 will be described assuming the following cases. It is assumed that the two fixed terminals 21 are electrically connected between the power supply and the load (motor or the like), and the presence or absence of current supply from the power supply to the load can be switched by opening and closing the main contact. Further, the two terminals 70, each of which has an auxiliary fixed contact 71, are electrically connected to a monitoring device provided outside the electromagnetic relay 1, and the monitoring device has two terminals 70 that accompany the opening and closing of the auxiliary contact. By monitoring the change in the continuity state between them, it is assumed that the open / closed state of the auxiliary contact is detected. Further, when the monitoring device detects that the auxiliary contact is open, it determines that the main contact is closed. On the other hand, when the monitoring device detects that the auxiliary contact is closed, it determines that the main contact is open.

The electromagnetic relay 1 operates as described above when there is no abnormality such as welding. That is, when the exciting coil 51 is energized, as shown in FIG. 1, the main contact is closed (that is, the position of the two movable contacts 222 is the first closed position), and the two fixed terminals 21 are electrically connected. Current is supplied from the power supply to the load. Further, at this time, the auxiliary contacts are opened (that is, the positions of the two auxiliary movable contacts 81 are the second open positions), the two terminals 70 do not conduct with each other, and the monitoring device has the auxiliary contacts open. Detect that. Therefore, the monitoring device determines that the main contact is closed. On the other hand, when the exciting coil 51 is not energized, as shown in FIG. 2, the main contact is open (that is, the position of the two movable contacts 222 is the first open position), and the two fixed terminals 21 are electrically connected. No current is supplied from the power supply to the load. Further, at this time, the auxiliary contacts are closed (that is, the positions of the two auxiliary movable contacts 81 are the second closed positions), the two terminals 70 are electrically connected, and the monitoring device has the auxiliary contacts closed. Is detected. Therefore, the monitoring device determines that the main contact is open.

Further, in the present embodiment, since each auxiliary movable contact 81 is integrated with the movable iron core 53, even if a welding abnormality occurs at the main contact or the auxiliary contact, the position of each movable contact 222 and the position of the movable iron core 53 , The position of each auxiliary movable contact 81 can be linked. Here, it is assumed that each auxiliary fixed contact 71 and the corresponding auxiliary movable contact 81 are welded together. In this case, regardless of the energized state of the exciting coil 51, as shown in FIG. 2, the main contact is opened, no current is supplied from the power supply to the load, and the auxiliary contact is closed. Determine that the contacts are open.

Further, it is assumed that each fixed contact 211 and the corresponding movable contact 222 are welded together. In this case, regardless of the energized state of the exciting coil 51, as shown in FIG. 1, the main contact is closed, current is supplied from the power supply to the load, and the auxiliary contact is opened, so that the monitoring device is the main contact. Is closed.

As described above, in the present embodiment, even when an abnormality such as welding occurs in the electromagnetic relay 1, the monitoring device can detect the open / closed state of the main contact based on the conduction state of the auxiliary contact. .. Further, when one of the main contact and the auxiliary contact is welded, the other contact can be opened. Therefore, the electromagnetic relay 1 can be adapted to a linked contact (IEC60947-5-1) and a mirror contact (IEC60947-4-1). Linked contacts and mirror contacts have a structure consisting of a plurality of contacts that do not close at the same time.

(Modification example 1)
Hereinafter, the electromagnetic relay 1A according to the first modification will be described with reference to FIGS. 5A to 6. The same components as those in the embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The electromagnetic relay 1A includes a holder 84. The shape of the holder 84 is tubular (preferably cylindrical). More specifically, the holder 84 has a tubular (preferably cylindrical) holder main body 841, an inner collar portion 842, and a plurality of (four in FIG. 6) claw portions 843. The shape of the inner collar portion 842 is an annular shape. The inner flange portion 842 extends inward in the radial direction of the holder main body 841 from one end (upper end) in the axial direction of the holder main body 841. Each of the plurality of claw portions 843 extends inward in the radial direction of the holder main body 841 from the lower end of the holder main body 841.

The holder 84 is connected to the movable iron core 53. More specifically, the inner flange portion 842 of the holder 84 is connected to the movable iron core 53 by means such as welding.

The second pressure contact spring 83 is arranged inside the holder 84. The first end of the second pressure spring 83 in the expansion / contraction direction (vertical direction) is fixed to the movable iron core 53, and the second end opposite to the first end is fixed to the auxiliary movable contact 80. Has been done. More specifically, the second pressure contact spring 83 is fixed by being sandwiched between the movable iron core 53 and the auxiliary movable contact 80. The auxiliary movable contact 80 is sandwiched between the second pressure spring 83 and the plurality of claw portions 843. The plurality of claw portions 843 regulate the movement of the auxiliary movable contact 80 under the auxiliary movable contact 80, similarly to the regulating member 82 of the embodiment. In this way, the auxiliary movable contacts 80 (two auxiliary movable contacts 81) are integrated with the movable iron core 53 by being connected to the movable iron core 53 via the holder 84.

When the exciting coil 51 is energized, as shown in FIG. 5A, each auxiliary movable contact 80 is separated from the corresponding auxiliary fixed contact 71.

The diameter of the auxiliary movable contact 80 is smaller than the diameter of the holder body 841. Therefore, when the exciting coil 51 is de-energized, as shown in FIG. 5B, when each auxiliary movable contact 80 receives a normal force from the corresponding auxiliary fixed contact 71, the second pressure spring 83 is compressed and assisted. The movable contact 80 moves up in the holder body 841.

According to the first modification, since the second pressure contact spring 83 is arranged inside the holder 84, there is an advantage that the second pressure contact spring 83 can be easily positioned.

The holder 84 may have an outer flange portion extending outward in the radial direction of the holder main body 841 from one end (upper end) in the axial direction of the holder main body 841 instead of the inner flange portion 842. The outer flange portion may be connected to the movable iron core 53 by means such as welding.

(Modification 2)
Hereinafter, the electromagnetic relay 1B according to the second modification will be described with reference to FIGS. 7A to 8. The same components as those in the embodiment are designated by the same reference numerals, and the description thereof will be omitted. The electromagnetic relay 1B of the second modification does not include the second pressure contact spring 83 and the regulating member 82.

The auxiliary movable contact 80B (auxiliary movable contact 81) of the present modification 2 is provided separately from the movable iron core 53. That is, there is no mechanical connection between the auxiliary movable contact 80B (auxiliary movable contact 81) and the movable iron core 53.

The auxiliary movable contact 80B is a leaf spring. The auxiliary movable contact 80B has a plate-shaped contact body 800 and a contact portion 801. The contact body 800 has a length in a direction oblique to the vertical direction. One end of the auxiliary movable contact 80B in the length direction of the contact body 800 is in contact with the lower surface of the movable iron core 53. The other end of the contact body 800 is mechanically and electrically connected to one of the two terminals 70. A plate-shaped contact portion 801 projects from between both ends of the contact body 800 in the length direction. The thickness direction of the contact portion 801 is along the vertical direction.

The auxiliary movable contact 80B includes one auxiliary movable contact 81. More specifically, the lower surface of the contact portion 801 functions as an auxiliary movable contact 81.

In the following, of the two terminals 70, the terminal 70 to which the contact body 800 is fixed may be referred to as a first terminal 70X, and the other may be referred to as a second terminal 70Y. The first terminal 70X does not include the auxiliary fixed contact 71. The second terminal 70Y includes an auxiliary fixed contact 71. That is, the electromagnetic relay 1B includes one auxiliary fixed contact 71.

When the exciting coil 51 is energized, the auxiliary movable contact 81 is separated from the auxiliary fixed contact 71 as shown in FIG. 7A. That is, there is no conduction between the two terminals 70. When the exciting coil 51 is energized to not energized, the movable iron core 53 moves downward, so that the auxiliary movable contact 80B is deformed by receiving a force from the movable iron core 53. That is, the auxiliary movable contact 80B is deformed so that the angle formed by the plane orthogonal to the vertical direction and the length direction of the contact body 800 becomes small. At this time, the auxiliary movable contact 81 moves downward. Therefore, when the exciting coil 51 is not energized, the auxiliary movable contact 81 comes into contact with the auxiliary fixed contact 71, as shown in FIG. 7B. That is, the two terminals 70 are electrically connected to each other via the auxiliary movable contact 80B.

According to the present modification 2, the configuration around the auxiliary contact and the auxiliary contact can be simplified as compared with the embodiment.

The auxiliary movable contact 80B may be configured to be deformed by receiving a force from the shaft 56 instead of the movable iron core 53.

Further, the movable iron core 53 and the auxiliary movable contact 80B may be integrated by connecting the movable iron core 53 and the auxiliary movable contact 80B by welding or the like.

Further, as the auxiliary movable contact 80B, an actuator of a contact device (microswitch or the like) provided with a contact may be used. The contacts of the contact device function as auxiliary contacts of the electromagnetic relay 1B. The current or signal input / output terminals included in the contact device function as terminals 70 of the electromagnetic relay 1B. When the actuator is pushed by the movable iron core 53, the contacts of the contact device are opened and closed. The contacts of the contact device may be a contacts, b contacts or c contacts.

(Modification example 3)
Hereinafter, the electromagnetic relay 1C according to the third modification will be described with reference to FIGS. 9A and 9B. The same reference numerals are given to the same configurations as those of the second modification, and the description thereof will be omitted.

The auxiliary contact of the modified example 2 constitutes a b contact, whereas the auxiliary contact of the present modified example 3 constitutes a c contact.

The auxiliary movable contact 80C (two auxiliary movable contacts 81) of the present modification 3 is provided separately from the movable iron core 53. The auxiliary movable contact 80C has a contact body 800C and a contact portion 801C. The contact body 800C has a shape formed by bending a rectangular plate at a plurality of locations. One end of the contact body 800C is in contact with the lower surface of the movable iron core 53. The other end of the contact body 800C is mechanically and electrically connected to one terminal 70. The contact portion 801C is mechanically and electrically connected to the contact body 800C. The contact portion 801C includes an auxiliary movable contact 81 on the upper surface and the lower surface, respectively.

The electromagnetic relay 1C includes a first conductive portion 701 and a second conductive portion 702. The first conductive portion 701 and the second conductive portion 702 each include an auxiliary fixed contact 71.

The electromagnetic relay 1C has three terminals 70. In the following, of the three terminals 70, the terminal 70 to which the contact body 800C is fixed is referred to as a first terminal 70X, another terminal 70 is referred to as a second terminal 70Y, and the remaining one terminal is referred to. 70 may be referred to as a third terminal 70Z. None of the three terminals 70 includes an auxiliary fixed contact 71. That is, the electromagnetic relay 1B includes a total of two auxiliary fixed contacts 71, that is, an auxiliary fixed contact 71 provided in the first conductive portion 701 and an auxiliary fixed contact 71 provided in the second conductive portion 702.

The second conductive portion 702 is mechanically and electrically connected to the third terminal 70Z. The auxiliary movable contact 81 provided on the upper surface of the contact portion 801C faces the auxiliary fixed contact 71 provided on the second conductive portion 702. The pair of the auxiliary movable contact 81 and the auxiliary fixed contact 71 constitutes the a contact.

On the other hand, the first conductive portion 701 is mechanically and electrically connected to the second terminal 70Y. The auxiliary movable contact 81 provided on the lower surface of the contact portion 801C faces the auxiliary fixed contact 71 provided on the first conductive portion 701. The pair of the auxiliary movable contact 81 and the auxiliary fixed contact 71 constitutes the b contact.

When the exciting coil 51 is energized, the a contact is closed and the b contact is open, as shown in FIG. 9A. In other words, the contact portion 801C and the second conductive portion 702 are electrically connected, and the contact portion 801C and the first conductive portion 701 are not electrically connected. As a result, the first terminal 70X and the third terminal 70Z are conducting, and the first terminal 70X and the second terminal 70Y are not conducting.

When the exciting coil 51 is energized to not energized, the movable iron core 53 moves downward, so that the auxiliary movable contact 80C is deformed by receiving a force from the movable iron core 53. At this time, the contact portion 801C moves downward. Therefore, when the exciting coil 51 is not energized, the a contact is open and the b contact is closed, as shown in FIG. 9B. In other words, the contact portion 801C and the second conductive portion 702 are not electrically connected, and the contact portion 801C and the first conductive portion 701 are electrically connected. As a result, the first terminal 70X and the third terminal 70Z are not conducting, and the first terminal 70X and the second terminal 70Y are conducting.

According to this modification 3, the c contact can be configured in the electromagnetic relay 1C.

The auxiliary movable contact 80C may be configured to be deformed by receiving a force from the shaft 56 instead of the movable iron core 53.

Further, the movable iron core 53 and the auxiliary movable contact 80C may be integrated by connecting the movable iron core 53 and the auxiliary movable contact 80C by welding or the like.

(Modification example 4)
Hereinafter, the electromagnetic relay 1D according to the modified example 4 will be described with reference to FIGS. 10A and 10B. The same components as those in the embodiment are designated by the same reference numerals, and the description thereof will be omitted. The electromagnetic relay 1D of the present modification 4 does not include the auxiliary movable contact 80, the second pressure contact spring 83, and the regulation member 82.

The electromagnetic relay 1D of the present modification 4 includes a first conductive spring 72 and a second conductive spring 73. The first conductive spring 72 and the second conductive spring 73 have the same configuration.

Each of the first conductive spring 72 and the second conductive spring 73 is a compression spring. Each of the first conductive spring 72 and the second conductive spring 73 is formed of a conductive material such as metal and has conductivity. The first conductive spring 72 and the second conductive spring 73 have a one-to-one correspondence with the two terminals 70, and are electrically connected to the corresponding terminals 70, respectively.

The first end (spring seat) of each of the first conductive spring 72 and the second conductive spring 73 in the expansion / contraction direction functions as an auxiliary fixed contact 71. Hereinafter, the auxiliary fixing contact 71 of the first conductive spring 72 may be referred to as the first auxiliary fixing contact 71. Further, the auxiliary fixing contact 71 of the second conductive spring 73 may be referred to as a second auxiliary fixing contact 71. That is, the first conductive spring 72 includes the first auxiliary fixing contact 71, and the second conductive spring 73 includes the second auxiliary fixing contact 71.

The first auxiliary fixed contact 71 and the second auxiliary fixed contact 71 face the movable iron core 53, respectively. More specifically, the first auxiliary fixing contact 71 and the second auxiliary fixing contact 71 each face the movable iron core 53 in the vertical direction. The movable iron core 53 functions as an alternative to the auxiliary movable contact 80 (see FIG. 1). In other words, in the present modification 4, the movable iron core 53 and the auxiliary movable contact are made of one member. That is, the movable iron core 53 has conductivity, and as shown in FIG. 10B, when the exciting coil 51 is not energized, the movable iron core 53 has the first auxiliary fixing contact 71 and the second auxiliary fixing. It touches the contact 71. Of the movable iron core 53, the contact portion with the first auxiliary fixed contact 71 and the contact portion with the second auxiliary fixed contact 71 each function as the auxiliary movable contact 81. That is, these two auxiliary movable contacts 81 are integrated with the movable iron core 53. These two auxiliary movable contacts 81 are electrically connected.

In the following, of the two terminals 70, the terminal 70 electrically connected to the first conductive spring 72 is referred to as the first terminal 70X, and the terminal 70 electrically connected to the second conductive spring 73. May be referred to as a second terminal 70Y.

The second end (opposite side of the auxiliary fixed contact 71 side) of each of the first conductive spring 72 and the second conductive spring 73 in the expansion / contraction direction is fixed to the corresponding terminal 70. The second end is in contact with the base 61.

As shown in FIG. 10A, when the exciting coil 51 is energized, the two auxiliary movable contacts 81 are in the second open position. When the two auxiliary movable contacts 81 are in the second open position, each of the first conductive spring 72 and the second conductive spring 73 is separated from the corresponding auxiliary movable contact 81 of the two auxiliary movable contacts 81. ..

As shown in FIG. 10B, when the exciting coil 51 is not energized, the two auxiliary movable contacts 81 are in the second closed position. When the two auxiliary movable contacts 81 are in the second closed position, each of the first conductive spring 72 and the second conductive spring 73 receives pressure from the corresponding auxiliary movable contact 81 of the two auxiliary movable contacts 81. Is elastically compressed. As a result, the contact pressure between each of the two auxiliary movable contacts 81 and the corresponding auxiliary fixed contact 71 is secured. Further, the collision sound can be reduced as compared with the case where the movable iron core 53 is in contact with the terminal 70.

(Modification 5)
The present modification 5 is a further modification of the modification 4. In this modification 5, one of the first conductive spring 72 and the second conductive spring 73 is in contact with the movable iron core 53 at all times (that is, both when the exciting coil 51 is energized and when it is not energized). In that respect, it differs from the modified example 4. Since the first conductive spring 72 and the second conductive spring 73 have the same configuration, there is no difference in configuration regardless of which one is in contact with the movable iron core 53 at all times. Hereinafter, it will be described that the first conductive spring 72 is always in contact with the movable iron core 53. That is, in the present modification 5, for example, a spring having a longer natural length than that of the modification 4 is used as the first conductive spring 72. Alternatively, in the present modification 5, for example, the first end (upper end) of the first conductive spring 72 is fixed to the movable iron core 53 in a state where the first conductive spring 72 is extended beyond its natural length.

In this configuration, when the exciting coil 51 is energized to not energized, the movable iron core 53 moves downward while applying pressure to the second conductive spring 73 to elastically compress it. It contacts the first auxiliary fixed contact 71 of the first conductive spring 72. That is, the auxiliary movable contact 81 moves to the second closed position, and the first terminal 70X and the second terminal 70Y become conductive.

Since the first end of the second conductive spring 73 is always in contact with the movable iron core 53, it does not have a function as an auxiliary fixed contact. That is, the first end of the second conductive spring 73 does not have a function as an auxiliary fixed contact 71 that takes a state of being in contact with the auxiliary movable contact 81 and a state of being separated from the auxiliary movable contact 81. The movable iron core 53 includes only one auxiliary movable contact 81. The auxiliary movable contact 81 faces the auxiliary fixed contact 71 of the first conductive spring 72.

The second conductive spring 73 is a compression spring having electrical conductivity, which is electrically connected to the second terminal 70Y and the auxiliary movable contact 81 (movable iron core 53), and is one end (first) in the expansion / contraction direction. One end) is fixed to the movable iron core 53.

(Modification 6)
This modification 6 is a further modification of the modification 4. This modification 6 is different from the modification 4 in that the electromagnetic relay 1D does not include the second conductive spring 73. In the present modification 6, for example, the outer cylinder portion 62 of the case 6 may be electrically connected to the second terminal 70Y, and a part of the surface of the outer cylinder portion 62 may be used as the second auxiliary fixing contact 71. That is, the outer cylinder portion 62 (electric circuit portion) is electrically connected to the second terminal 70Y and includes the second auxiliary fixed contact 71. When the exciting coil 51 is not energized, for example, the movable iron core 53 may be in direct contact with the second auxiliary fixed contact 71, or a conductive member mechanically and electrically connected to the movable iron core 53 is provided. The conductive member may come into contact with the second auxiliary fixing contact 71.

(Modification 7)
Hereinafter, the electromagnetic relay 1E according to the modified example 7 will be described with reference to FIGS. 11A and 11B. The same components as those in the embodiment are designated by the same reference numerals, and the description thereof will be omitted. The electromagnetic relay 1E of the present modification 7 does not include the auxiliary movable contact 80, the second pressure contact spring 83, and the regulation member 82.

The electromagnetic relay 1E is provided with a blade receiver 74. The blade receiver 74 includes two auxiliary fixed contacts 71. The blade receiver 74 sandwiches the two auxiliary movable contacts 81 when the two auxiliary movable contacts 81 are in the second closed position.

More specifically, the blade holder 74 includes two leaf springs 740. The two leaf springs 740 are made of a conductive material such as copper. The two leaf springs 740 have a one-to-one correspondence with the two terminals 70. Each of the two leaf springs 740 is mechanically and electrically connected to the corresponding terminal 70. Each of the two leaf springs 740 includes an auxiliary fixed contact 71. More specifically, a portion of the surface of each of the two leaf springs 740 functions as an auxiliary fixed contact 71. These two auxiliary fixed contacts 71 face each other in the left-right direction.

In FIGS. 11A and 11B, the shape of the movable iron core 53 is different from the shape of the movable iron core 53 in the embodiment. That is, the movable iron core 53 has a protruding portion 532. The protrusion 532 is formed at the lower end of the movable iron core 53. The movable iron core 53 projects downward from the portion of the movable iron core 53 around the protruding portion 532 in the protruding portion 532. A part of the surface of the protrusion 532 functions as two auxiliary movable contacts 81. That is, the two auxiliary movable contacts 81 are integrated with the movable iron core 53.

As shown in FIG. 11A, when the exciting coil 51 is energized, the protruding portion 532 is separated from the blade receiver 74.

When the exciting coil 51 changes from the energized state (see FIG. 11A) to the non-energized state (see FIG. 11B), the protruding portion 532 expands the distance between the two leaf springs 740 and the two leaf springs 740. Enter between. Therefore, when the exciting coil 51 is not energized, the protruding portion 532 is sandwiched between the two leaf springs 740. That is, the auxiliary fixed contact 71 of each of the two leaf springs 740 and the corresponding auxiliary movable contact 81 come into contact with each other. As a result, the two terminals 70 become conductive. Further, the elastic force of the two leaf springs 740 ensures the contact pressure between each of the two auxiliary movable contacts 81 and the corresponding auxiliary fixed contact 71. Further, the collision sound can be reduced as compared with the case where the movable iron core 53 is in contact with the terminal 70.

A part of the surface of the shaft 56 may function as an auxiliary movable contact 81. That is, the blade receiver 74 may sandwich the shaft 56.

(Modification 8)
Hereinafter, the electromagnetic relay 1F according to the modified example 8 will be described with reference to FIGS. 12A and 12B. The same components as those in the embodiment are designated by the same reference numerals, and the description thereof will be omitted. The electromagnetic relay 1F of the present modification 8 does not include the second pressure contact spring 83 and the regulating member 82.

The auxiliary movable contact 80F of the present modification 8 is provided separately from the movable iron core 53. That is, the two auxiliary movable contacts 81 are provided separately from the movable iron core 53.

The auxiliary movable contact 80F has elasticity. The auxiliary movable contact 80F is formed by plating an elastic member made of, for example, synthetic resin or rubber. Alternatively, the auxiliary movable contact 80F is formed, for example, using a metal as a material.

The auxiliary movable contact 80F has a pressing portion 803 and a covering portion 804. In the cross section orthogonal to the front-rear direction, the shape of the pressing portion 803 is trapezoidal. In the cross section orthogonal to the front-rear direction, the shape of the covering portion 804 is a trapezoidal shape longer in the left-right direction than the pressing portion 803. The pressing portion 803 is connected to the upper surface of the covering portion 804. The auxiliary movable contact 80F is fixed to the case 6. The lower end of the auxiliary movable contact 80F is in contact with the base 61.

The upper surfaces of the two terminals 70 each function as an auxiliary fixed contact 71. The covering portion 804 covers the two terminals 70 from above. The covering portion 804 includes two auxiliary movable contacts 81. Each of the two auxiliary movable contacts 81 faces the corresponding auxiliary fixed contact 71. That is, on the lower surface of the covering portion 804, two regions facing the two auxiliary fixed contacts 71 each function as auxiliary movable contacts 81.

The pressing portion 803 is arranged below the shaft 56. The pressing portion 803 faces the shaft 56 in the vertical direction.

As shown in FIG. 12A, the shaft 56 is separated from the auxiliary movable contact 80F when the exciting coil 51 is energized. Also, the two auxiliary movable contacts 81 are in the second open position.

When the exciting coil 51 is energized (see FIG. 12A) to not energized (see FIG. 12B), the movable iron core 53 and the shaft 56 move downward. Since the shaft 56 pushes the pressing portion 803 of the auxiliary movable contact 80F, the two auxiliary movable contacts 81 are second while the auxiliary movable contact 80F is sandwiched between the shaft 56 and the base 61 and elastically compressed. Move to the closed position of. That is, when the two auxiliary movable contacts 81 are in the second closed position, the auxiliary movable contact 80F is sandwiched between the shaft 56 and the base 61 and elastically compressed, and the auxiliary movable contacts 81 correspond to each other. Contact the auxiliary fixed contact 71. As a result, the two terminals 70 become conductive. The elastic force of the auxiliary movable contact 80F ensures the contact pressure between each of the two auxiliary movable contacts 81 and the corresponding auxiliary fixed contact 71. Further, since the elastic auxiliary movable contact 80F is in contact with the terminal 70, the collision noise can be reduced as compared with the case where the movable iron core 53 is in contact with the terminal 70.

Instead of the shaft 56, the movable iron core 53 may push the auxiliary movable contact 80F.

(Modification 9)
Hereinafter, the electromagnetic relay 1G according to the modified example 9 will be described with reference to FIGS. 13A and 13B. The same components as those of the modified example 8 are designated by the same reference numerals, and the description thereof will be omitted.

The auxiliary movable contact 80G of the present modification 9 is different from the auxiliary movable contact 80F of the modification 8 in that it is integrated with the movable iron core 53. Further, the shape of the auxiliary movable contact 80G of the present modification 9 is different from the shape of the auxiliary movable contact 80F of the modification 8. In the cross section orthogonal to the front-rear direction, the shape of the auxiliary movable contactor 80G is trapezoidal. The auxiliary movable contact 80G is connected to the lower surface of the movable iron core 53. The auxiliary movable contact 80G includes two auxiliary movable contacts 81. Each of the two auxiliary movable contacts 81 faces the corresponding auxiliary fixed contact 71. That is, on the lower surface of the auxiliary movable contact 80G, two regions facing the two auxiliary fixed contacts 71 each function as the auxiliary movable contact 81.

As shown in FIG. 13A, when the exciting coil 51 is energized, each of the two auxiliary movable contacts 81 is separated from the corresponding auxiliary fixed contact 71. That is, the two auxiliary movable contacts 81 are in the second open position.

When the exciting coil 51 is energized (see FIG. 13A) to not energized (see FIG. 13B), the auxiliary movable contact 80G moves downward together with the movable iron core 53, and the two auxiliary movable contacts. Each of the 81 contacts the corresponding auxiliary fixed contact 71. That is, the two auxiliary movable contacts 81 move to the second closed position. When the two auxiliary movable contacts 81 are in the second closed position, the auxiliary movable contact 80G is sandwiched between the movable iron core 53 and the two auxiliary fixed contacts 71 and elastically compressed. The elastic force of the auxiliary movable contact 80G ensures the contact pressure between each of the two auxiliary movable contacts 81 and the corresponding auxiliary fixed contact 71. Further, since the elastic auxiliary movable contact 80G is in contact with the terminal 70, the collision noise can be reduced as compared with the case where the movable iron core 53 is in contact with the terminal 70.

(Other variants of the embodiment)
Next, other modifications of the embodiment are listed. The following modifications may be realized in appropriate combinations. In addition, the following modified examples may be realized in combination with the above-mentioned modified examples as appropriate.

The number of fixed contacts 211 and movable contacts 222 may be one or two or more.

The number of each of the auxiliary fixed contact 71 and the auxiliary movable contact 81 may be one or two or more.

The main contact of the electromagnetic relay 1 may be an a contact, a b contact, or a c contact.

The auxiliary contact of the electromagnetic relay 1 may be an a contact, a b contact, or a c contact.

The electromagnetic relay 1 may have a structure in which the auxiliary contact opens when the main contact opens and the auxiliary contact closes when the main contact closes.

In the embodiment, the outer cylinder portion 62 is fixed to the upper surface of the base 61. On the other hand, the outer cylinder portion 62 may be fixed to the lower surface of the base 61. For example, the outer cylinder portion 62 may be extended downward from the embodiment, and the lower end of the outer cylinder portion 62 may be fixed to the lower surface of the base 61.

The base 61 may be formed of glass as a material instead of ceramic.

The base 61 may be formed of a metal instead of the ceramic. In this case, for example, by arranging a ring (cylinder) containing ceramic or glass around the terminal 70, the electrical insulation between the base 61 and the terminal 70 may be ensured. As the metal material constituting the base 61, for example, 42 alloy or the like can be used.

(Summary)
From the embodiments described above, the following aspects are disclosed.

The electromagnetic relays 1, 1A to 1G according to the first aspect are arranged so as to be surrounded by the exciting coil 51 and the exciting coil 51, and move in the vertical direction according to a change in the energized state of the exciting coil 51. A fixed contact 211 provided with 53 and a movable contact 222, which moves in the vertical direction in conjunction with the movable iron core 53, and a fixed contact 211 which comes into contact with or separates from the movable contact 222 in conjunction with the movement of the movable contact 22. When viewed from above, the auxiliary fixed contact 71 arranged in the region R1 surrounded by the exciting coil 51 and the movable iron core 53 move in conjunction with each other, and (1) the movable contact 222 comes into contact with the fixed contact 211. When it is away from the auxiliary fixed contact 71 and when the movable contact 222 is away from the fixed contact 211, it comes into contact with the auxiliary fixed contact 71, or (2) when the movable contact 222 is away from the fixed contact 211, the auxiliary fixed contact It includes an auxiliary movable contact 81 that is separated from the 71 and comes into contact with the auxiliary fixed contact 71 when the movable contact 222 is in contact with the fixed contact 211. The movable contact 22 is arranged above the exciting coil 51, the auxiliary fixed contact 71 and the auxiliary movable contact 81 are arranged in the region R1 surrounded by the exciting coil 51 when viewed from above, and the upper end of the exciting coil 51. Located further down.

According to this configuration, it is possible to provide electromagnetic relays (1, 1A to 1G) whose structure is easy to simplify.

Further, in the electromagnetic relays 1, 1A to 1G according to the second aspect, the movable contacts 22, the movable iron cores 53, the auxiliary movable contacts 81, and the auxiliary fixed contacts 71 are arranged in this order from top to bottom.

According to this configuration, the area occupied by the movable contactor 22, the movable iron core 53, the auxiliary fixed contact 71, and the auxiliary movable contact 81 can be reduced when viewed from above.

Further, in the electromagnetic relays 1, 1A to 1G according to the third aspect, when the movable contact 222 is in contact with the fixed contact 211, the auxiliary movable contact 81 is separated from the auxiliary fixed contact 71, and the movable contact 222 is separated from the fixed contact 211. When separated, the auxiliary movable contact 81 is in contact with the auxiliary fixed contact 71.

According to this configuration, the main contact and the auxiliary contact are not closed at the same time, so that the electromagnetic relays 1, 1A to 1G can be easily designed.

Further, in the electromagnetic relays 1, 1A to 1G according to the fourth aspect, when the exciting coil 51 is not energized, the movable contact 222 is separated from the fixed contact 211, and when the exciting coil 51 is energized, the movable contact 222 is Contact the fixed contact 211.

According to this configuration, the structure of electromagnetic relays 1, 1A to 1G in which the main contact is an a contact (normal off type) can be simplified.

Further, the electromagnetic relays 1, 1A to 1G according to the fifth aspect further include a case 6 arranged inside the exciting coil 51, and a movable iron core 53 and an auxiliary fixed contact are provided in the internal space 600 of the case 6. 71 and an auxiliary movable contact 81 are arranged.

According to this configuration, the movable iron core 53, the auxiliary fixed contact 71, and the auxiliary movable contact 81 can be arranged compactly.

Further, the electromagnetic relays 1, 1A to 1G according to the sixth aspect further include a terminal 70 electrically connected to the auxiliary fixed contact 71, and the case 6 has a tubular outer cylinder portion 62 and a base 61 ( The terminal 70 penetrates the base 61 (bottom), including the bottom).

According to this configuration, the signal path of the auxiliary contact can be secured by the terminal 70.

Further, in the electromagnetic relays 1, 1A to 1G according to the seventh aspect, the outer cylinder portion 62 is made of metal. The base 61 has electrical insulation.

According to this configuration, the electrical insulation between the outer cylinder portion 62 and the terminal 70 can be ensured.

Further, in the electromagnetic relays 1, 1A, 1D, 1E, and 1G according to the eighth aspect, the auxiliary movable contact 81 is integrated with the movable iron core 53.

According to this configuration, even if a welding abnormality occurs at the main contact or the auxiliary contact, the position of the movable contact 222 and the position of the auxiliary movable contact 81 can be linked.

Further, in the electromagnetic relays 1 and 1A according to the ninth aspect, the auxiliary movable contact 80 provided with the auxiliary movable contact 81 and the compression spring, the first end of which is fixed to the movable iron core 53. A pressure spring 83 whose second end is fixed to the auxiliary movable contact 80 is further provided.

According to this configuration, the contact pressure between the auxiliary movable contact 81 and the auxiliary fixed contact 71 can be secured.

Further, the electromagnetic relay 1A according to the tenth aspect further includes a tubular holder 84 connected to the movable iron core 53, and the pressure contact spring 83 is arranged inside the holder 84.

According to this configuration, the pressure contact spring 83 can be easily positioned.

Further, the electromagnetic relay 1G according to the eleventh aspect further includes an auxiliary movable contact 80G connected to a movable iron core 53, and the auxiliary movable contact 80G is provided with an auxiliary movable contact 81, and the auxiliary movable contact 81 is provided. When in contact with the auxiliary fixed contact 71, the auxiliary movable contact 80G is sandwiched between the movable iron core 53 and the auxiliary fixed contact 71 and is elastically compressed.

According to this configuration, the contact pressure between the auxiliary fixed contact 71 and the auxiliary movable contact 81 can be secured.

Further, the electromagnetic relay 1D according to the twelfth aspect is composed of two auxiliary fixed contacts 71, two auxiliary movable contacts 81, a first terminal 70X, a second terminal 70Y, and a conductive compression spring. A first conductive spring 72 electrically connected to the first terminal 70X and provided with an auxiliary fixed contact 71, and a conductive compression spring electrically connected to the second terminal 70Y. A second conductive spring 73, which is connected and provided with an auxiliary fixed contact 71, is provided. One auxiliary movable contact 81 corresponds to one auxiliary fixed contact 71, the other auxiliary movable contact 81 corresponds to the other auxiliary fixed contact 71, and the two auxiliary movable contacts 81 are electrically connected to each other. When one auxiliary movable contact 81 is in contact with one auxiliary fixed contact 71, the first conductive spring 72 receives pressure from one auxiliary movable contact 81 and is compressed, and the other auxiliary is compressed. When the movable contact 81 is in contact with the other auxiliary fixed contact 71, the second conductive spring 73 receives pressure from the other auxiliary movable contact 81 and is compressed.

According to this configuration, the contact pressure between the auxiliary fixed contact 71 and the auxiliary movable contact 81 can be secured.

Further, the electromagnetic relay 1D according to the thirteenth aspect is a compression spring having a first terminal 70X, a second terminal 70Y, and electrical conductivity, and is a first terminal 70X and one auxiliary movable contact 81. A first conductive spring 72, one end of which is electrically connected to a movable iron core 53, and a conductive compression spring, which are electrically connected to a second terminal 70Y. A second conductive spring 73 provided with an auxiliary fixed contact 71 is provided. When the auxiliary movable contact 81 is in contact with the auxiliary fixed contact 71, the first conductive spring 72 receives pressure from the movable iron core 53 and is elastically compressed, and the second conductive spring 73 receives pressure from the auxiliary movable contact 81. Is elastically compressed.

According to this configuration, the contact pressure between the auxiliary fixed contact 71 and the auxiliary movable contact 81 can be secured.

Further, the electromagnetic relay 1D according to the fourteenth aspect is composed of two auxiliary fixed contacts 71, two auxiliary movable contacts 81, a first terminal 70X, a second terminal 70Y, and a conductive compression spring. It is electrically connected to the first terminal 70X, and is electrically connected to the first conductive spring 72 provided with one auxiliary fixed contact 71 and the second terminal 70Y, and the other. The electric circuit portion (the outer cylinder portion 62 corresponds to the electric wire portion) provided with the auxiliary fixed contact 71 of the above is provided. One auxiliary movable contact 81 corresponds to one auxiliary fixed contact 71, the other auxiliary movable contact 81 corresponds to the other auxiliary fixed contact 71, and the two auxiliary movable contacts 81 are electrically connected to each other. When one auxiliary movable contact 81 is in contact with one auxiliary fixed contact 71 and the other auxiliary movable contact 81 is in contact with the other auxiliary fixed contact 71, the first conductive spring 72 is in contact with one auxiliary. It receives pressure from the movable contact 81 and is elastically compressed.

According to this configuration, the contact pressure between the auxiliary fixed contact 71 and the auxiliary movable contact 81 can be secured.

Further, the electromagnetic relay 1E according to the fifteenth aspect includes a blade receiver 74 provided with an auxiliary fixed contact 71.

According to this configuration, the contact pressure between the auxiliary fixed contact 71 and the auxiliary movable contact 81 can be secured.

In the electromagnetic relays 1B, 1C, and 1F, the structure of the movable iron core 53 can be simplified by providing the auxiliary movable contact 81 separately from the movable iron core 53.

Configurations other than the first aspect are not essential configurations for the electromagnetic relays 1, 1A to 1G, and can be omitted as appropriate.

1, 1A ~ 1G Electromagnetic relay 51 Exciting coil 510 Inner peripheral surface 511 Virtual surface 53 Movable iron core 211 Fixed contact 22 Movable contact 222 Movable contact 6 Case 61 Base (bottom)
62 Outer cylinder (electric circuit)
600 Internal space 70 terminal 70X 1st terminal 70Y 2nd terminal 71 Auxiliary fixed contact 72 1st conductive spring (conductive spring)
73 Second conductive spring 74 Blade holder 80, 80B, 80C, 80F, 80G Auxiliary movable contact 81 Auxiliary movable contact 82 Regulatory member 83 Second pressure contact spring (pressure contact spring part)
84 Holder R1 area R10 area

Claims (15)

1. Exciting coil and
   A movable iron core that is arranged so as to be surrounded by the exciting coil and moves in the vertical direction according to a change in the energized state of the exciting coil.
   A movable contact that is provided with a movable contact and moves in the vertical direction in conjunction with the movable iron core.
   A fixed contact that comes into contact with or separates from the movable contact in conjunction with the movement of the movable contact.
   When viewed from above, the first auxiliary fixed contact arranged in the area surrounded by the exciting coil and
   It moves in conjunction with the movable iron core and
   (1) When the movable contact is in contact with the fixed contact, it is separated from the first auxiliary fixed contact, and when the movable contact is separated from the fixed contact, it is in contact with the first auxiliary fixed contact.
   Or
   (2) When the movable contact is separated from the fixed contact, it is separated from the first auxiliary fixed contact, and when the movable contact is in contact with the fixed contact, it comes into contact with the first auxiliary fixed contact.
   With the first auxiliary movable contact
   With
   The movable contact is arranged above the exciting coil and
   The first auxiliary fixed contact and the first auxiliary movable contact are arranged in a region surrounded by the exciting coil when viewed from above, and are located below the upper end of the exciting coil.
   Electromagnetic relay.
2. From top to bottom, the movable contact, the movable iron core, the first auxiliary movable contact, and the first auxiliary fixed contact are arranged in this order.
   The electromagnetic relay according to claim 1.
3. When the movable contact is in contact with the fixed contact, the first auxiliary movable contact is separated from the first auxiliary fixed contact.
   When the movable contact is separated from the fixed contact, the first auxiliary movable contact is in contact with the first auxiliary fixed contact.
   The electromagnetic relay according to claim 1 or 2.
4. When the exciting coil is de-energized, the movable contact separates from the fixed contact.
   When the exciting coil is energized, the movable contact contacts the fixed contact.
   The electromagnetic relay according to any one of claims 1 to 3.
5. Further provided with a case arranged inside the exciting coil
   The movable iron core, the first auxiliary fixed contact, and the first auxiliary movable contact are arranged in the internal space of the case.
   The electromagnetic relay according to any one of claims 1 to 4.
6. A first terminal electrically connected to the first auxiliary fixed contact is further provided.
   The case includes a tubular outer cylinder portion and a bottom portion.
   The first terminal penetrates the bottom.
   The electromagnetic relay according to claim 5.
7. The outer cylinder portion is made of metal and
   The bottom has electrical insulation.
   The electromagnetic relay according to claim 6.
8. The first auxiliary movable contact is integrated with the movable iron core.
   The electromagnetic relay according to any one of claims 1 to 7.
9. With the auxiliary movable contact provided with the first auxiliary movable contact,
   A compression spring having a first end fixed to the movable iron core and a second end fixed to the auxiliary movable contactor.
   With more
   The electromagnetic relay according to claim 8.
10. Further provided with a tubular holder connected to the movable iron core,
    The pressure spring is arranged inside the holder.
    The electromagnetic relay according to claim 9.
11. Further provided with an auxiliary movable contactor connected to the movable iron core,
    The auxiliary movable contact is provided with the first auxiliary movable contact.
    When the first auxiliary movable contact is in contact with the first auxiliary fixed contact, the auxiliary movable contact is sandwiched between the movable iron core and the first auxiliary fixed contact and elastically compressed. ,
    The electromagnetic relay according to claim 10.
12. With the second auxiliary fixed contact
    With the second auxiliary movable contact
    1st terminal and
    2nd terminal and
    A first conductive spring that is a conductive compression spring that is electrically connected to the first terminal and is provided with the first auxiliary fixing contact.
    A second conductive spring that is a conductive compression spring that is electrically connected to the second terminal and is provided with the second auxiliary fixing contact.
    Further prepare
    The first auxiliary movable contact corresponds to the first auxiliary fixed contact.
    The second auxiliary movable contact corresponds to the second auxiliary fixed contact.
    The first auxiliary movable contact and the second auxiliary movable contact are electrically connected to each other.
    When the first auxiliary movable contact is in contact with the first auxiliary fixed contact, the first conductive spring receives pressure from the first auxiliary movable contact and is compressed.
    When the second auxiliary movable contact is in contact with the second auxiliary fixed contact, the second conductive spring receives pressure from the second auxiliary movable contact and is compressed.
    The electromagnetic relay according to claim 8.
13. 1st terminal and
    2nd terminal and
    A compression spring having electrical conductivity, which is electrically connected to the first terminal and the first auxiliary movable contact, and one end of which is fixed to the movable iron core.
    A second conductive spring that is a conductive compression spring that is electrically connected to the second terminal and is provided with the first auxiliary fixed contact.
    Further prepare
    When the first auxiliary movable contact is in contact with the first auxiliary fixed contact, the first conductive spring receives pressure from the movable iron core and is elastically compressed, and the second conductive spring is the first auxiliary. It is elastically compressed by receiving pressure from the movable contact.
    The electromagnetic relay according to claim 8.
14. With the second auxiliary fixed contact
    With the second auxiliary movable contact
    1st terminal and
    2nd terminal and
    A conductive spring that is electrically connected to the first terminal and is provided with the first auxiliary fixing contact, which is a conductive compression spring.
    An electric wire portion that is electrically connected to the second terminal and is provided with a second auxiliary fixed contact.
    Further prepare
    The first auxiliary movable contact corresponds to the first auxiliary fixed contact.
    The second auxiliary movable contact corresponds to the second auxiliary fixed contact.
    The first auxiliary movable contact and the second auxiliary movable contact are electrically connected to each other.
    When the first auxiliary movable contact is in contact with the first auxiliary fixed contact and the second auxiliary movable contact is in contact with the second auxiliary fixed contact, the conductive spring applies pressure from the first auxiliary movable contact. Receives and is elastically compressed,
    The electromagnetic relay according to claim 8.
15. Further provided with a blade holder provided with the first auxiliary fixing contact.
    The electromagnetic relay according to claim 8.

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