JP7417894B2 - contact device - Google Patents

Description

The present disclosure relates to a contact device. In particular, the present disclosure relates to a contact device in which a movable contact contacts and separates from a fixed contact.

Patent Document 1 discloses a contact device. The contact device of Patent Document 1 includes an armature, a drive unit that drives the armature, a fixed contact, a movable contact that contacts and separates from the fixed contact, a contact spring that supports the movable contact so that it can come into contact with and separate from the fixed contact, and an armature. and a card connecting the contact spring and the contact spring. The cards are made of a resilient material and are fixed to the armature and contact springs, respectively.

In Patent Document 1, a contact spring includes a plurality of leaf springs and a connecting member that connects the plurality of leaf springs and a card (movable member). The connecting member directly transmits the force from the movable member to the plurality of springs. The contact spring causes the movable contact to contact and separate from the fixed contact by deforming the plurality of leaf springs themselves.

Japanese Patent Application Publication No. 2015-216053

The problem is to provide a contact device that can reduce the possibility that a movable contact will weld to a fixed contact.

A contact device according to one aspect of the present disclosure includes a fixed contact and a contact spring. The contact spring includes a movable contact that faces the fixed contact in a predetermined direction. The contact spring is deformed by receiving a force from a movable member between a first state in which the movable contact is separated from the fixed contact and a second state in which the movable contact is in contact with the fixed contact. . The contact spring includes a first spring and a second spring. The first spring includes a fixed part to which the movable contact is fixed, and a movable part whose position relative to the fixed part changes according to a force from the movable member. The second spring receives a force from the movable member via the first spring to move the movable contact relative to the fixed contact. The fixing part includes a first collision part. The movable part includes a second collision part that overlaps the first collision part of the fixed part in the predetermined direction when the contact spring is in the first state.
A contact device according to one aspect of the present disclosure includes a fixed contact and a contact spring. The contact spring includes a movable contact that faces the fixed contact in a predetermined direction. The contact spring is deformed by receiving a force from a movable member between a first state in which the movable contact is separated from the fixed contact and a second state in which the movable contact is in contact with the fixed contact. . The contact spring includes a fixed part to which the movable contact is fixed, a movable part whose position relative to the fixed part changes according to a force from the movable member, and a connecting part that connects the fixed part and the movable part. including. The fixing part includes a first collision part. The movable part includes a second collision part that overlaps the first collision part of the fixed part in the predetermined direction when the contact spring is in the first state. The movable part changes its position relative to the fixed part by elastically deforming using the connecting part as a fulcrum in response to a force from the movable member.

Aspects of the present disclosure have the effect of reducing the possibility that the movable contact will be welded to the fixed contact.

FIG. 1 is a perspective view of a contact device according to one embodiment. FIG. 2 is an exploded perspective view of the contact device. FIG. 3 is an exploded perspective view of a circuit block of the contact device. FIG. 4 is an exploded perspective view of the contact spring of the circuit block. FIG. 5 is a perspective view of the first spring of the contact spring during the manufacturing process. FIG. 6 is a sectional view of the state shown in FIG. FIG. 7 is a perspective view of another state of the manufacturing process of the first spring. FIG. 8 is a sectional view of the state shown in FIG. 7. FIG. 9 is a perspective view of still another state of the manufacturing process of the first spring. FIG. 10 is a sectional view of the state shown in FIG. FIG. 11 is a perspective view of the first spring in a completed state. FIG. 12 is a sectional view of the state shown in FIG. 11. FIG. 13 is a plan view of the circuit block, in which the circuit block is in an off state. FIG. 14 is a plan view of the circuit block, in which the circuit block is in an on state. FIG. 15 is an explanatory diagram of the transition of the contact device from the off state to the on state. FIG. 16 is an explanatory diagram of the transition of the contact device from the on state to the off state. FIG. 17 is an explanatory diagram of a transition from an on state to an off state of a contact device according to a modification. FIG. 18 is an explanatory diagram of a transition from an OFF state to an ON state of a contact device according to another modification.

1. Embodiment 1.1 Overview FIG. 1 discloses a contact device 10 of one embodiment. The contact device 10 includes a circuit block 20, as shown in FIG. The circuit block 20 includes a fixed contact 41 and a contact spring 60. Contact spring 60 includes a movable contact 61 that faces fixed contact 41 in a predetermined direction. Contact spring 60 is deformed by receiving force from movable member 73 between a first state in which movable contact 61 is away from fixed contact 41 and a second state in which movable contact 61 is in contact with fixed contact 41. do. Contact spring 60 includes a fixed part 621 to which movable contact 61 is fixed, and a movable part 622 whose position relative to fixed part 621 changes according to the force from movable member 73. The fixed part 621 includes a first collision part 6211. The movable part 622 includes a second collision part 6224 that overlaps the first collision part 6211 of the fixed part 621 in a predetermined direction so as to be able to contact it when the contact spring 60 is in the first state.

In the contact device 10, the movable part 622 includes a second collision part 6224 that contacts the first collision part 6211 of the fixed part 621 in a predetermined direction when the contact spring 60 is in the first state. Therefore, in the process of the contact spring 60 changing from the second state to the first state, the second collision part 6224 of the movable part 622 comes into contact (collision) with the first collision part 6211 of the fixed part 621 due to the change in the position of the movable part 622. ) can be done. This contact (collision) accelerates the movement of the movable contact 61 in the direction away from the fixed contact 41. As a result, when the contact spring 60 transitions from the second state to the first state, the movable contact 61 can be separated from the fixed contact 41 to a predetermined position in a shorter time, and the movable contact 61 is welded to the fixed contact 41. This can reduce the possibility of

1.2 Details Hereinafter, the contact device 10 of this embodiment shown in FIG. 1 will be described in more detail. The contact device 10 is a relay that opens and closes movable contacts by physically moving them using an electromagnet, and is a so-called electromagnetic relay. The contact device 10 includes a circuit block 20 and a case 30, as shown in FIG.

As shown in FIG. 3, the circuit block 20 includes a first terminal 40, a second terminal 50, a contact spring 60, a drive device 70, a holder 80, and an arc extinguishing member 90.

The first terminal 40 includes a fixed contact 41 and a terminal plate 42, as shown in FIG. The fixed contact 41 and the terminal plate 42 are electrically conductive. Both the fixed contact 41 and the terminal plate 42 are made of metal. The terminal plate 42 has a holding piece 421, a terminal piece 422, and a connecting piece 423. The holding piece 421 has a rectangular plate shape. The fixed contact 41 is attached to the center of the holding piece 421. In this embodiment, the fixed contact 41 is attached to the holding piece 421 by caulking. The terminal piece 422 has a rectangular plate shape. The terminal piece 422 is used as a terminal for connection to an external circuit. The connecting piece 423 connects the holding piece 421 and the terminal piece 422. In this embodiment, the thickness directions of the holding piece 421 and the terminal piece 422 are perpendicular to each other. The holding piece 421, the terminal piece 422, and the connecting piece 423 are formed continuously and integrally.

The second terminal 50 has conductivity. The second terminal 50 is made of metal. As shown in FIG. 3, the second terminal 50 includes a fixed piece 501, a terminal piece 502, and a connecting piece 503. The fixed piece 501 has a rectangular plate shape. A pair of protrusions 504 are provided on one surface of the fixed piece 501 in the thickness direction. The pair of protrusions 504 are used to fix the contact spring 60 to the second terminal 50. The terminal piece 502 has a rectangular plate shape. The terminal piece 502 is used as a terminal for connection to an external circuit. The connecting piece 503 connects the fixed piece 501 and the terminal piece 502. In this embodiment, the fixed piece 501 and the terminal piece 502 have their thickness directions perpendicular to each other. The fixing piece 501, the terminal piece 502, and the connecting piece 503 are formed continuously and integrally.

As shown in FIGS. 13 and 14, the contact spring 60 has a movable contact 61 that faces the fixed contact 41 in a predetermined direction (left-right direction in FIGS. 13 and 14). The contact spring 60 receives a force from a movable member 73, which will be described later, and operates between a first state in which the movable contact 61 is away from the fixed contact 41 (see FIG. 13) and a second state in which the movable contact 61 is in contact with the fixed contact 41. It transforms between two states (see FIG. 14). In this embodiment, the first state is a state in which the movable contact 61 is at an initial position away from the fixed contact 41. The initial position is a position a certain distance away from the fixed contact 41. In this embodiment, the initial position is the position of the movable contact 61 when the drive device 70 is not being driven. If the contact spring 60 is in the first state, the movable contact 61 is away from the fixed contact 41, so the contact device 10 is in the off state. If the contact spring 60 is in the second state, the movable contact 61 is in contact with the fixed contact 41, so the contact device 10 is in the on state. The contact spring 60 has a movable contact 61, a first spring 62, and a second spring 63, as shown in FIG.

The second spring 63 holds the movable contact 61. The second spring 63 receives the force from the movable member 73 via the first spring 62 and moves the movable contact 61 relative to the fixed contact 41 . The second spring 63 has conductivity and elasticity. The second spring 63 is an elongated member having a length direction, a width direction, and a thickness direction. The second spring 63 is a laminate of a plurality of (three in this embodiment) leaf springs 630. Each leaf spring 630 is made of an elastic metal material. The second spring 63 has a base portion 631, a holding portion 632, and an arm portion 633. The base portion 631 is a portion of the second spring 63 that is fixed to the second terminal 50 . The base 631 is not displaced between the first and second states of the contact spring 60. Here, "not displaced" includes a state in which there is no displacement in a strict sense, or a state in which there is almost no displacement. The base 631 has a pair of holes 631a. The pair of protrusions 504 of the fixing piece 501 of the second terminal 50 are inserted into the pair of holes 631a of the base 631, respectively. Thereafter, the base portion 631 of the second spring 63 is fixed to the terminal piece 502 of the second terminal 50 by flattening the tips of the pair of protrusions 504 . For example, the second spring 63 is caulked and fixed to the second terminal 50. The holding part 632 is a part that holds the movable contact 61. The movable contact 61 and the first spring 62 are fixed to the holding portion 632 . The holding portion 632 has a (second) attachment hole 632a. The second attachment hole 632a is located at the center of the holding portion 632. The second attachment hole 632a is used for attaching the movable contact 61. The arm portion 633 integrally connects the base portion 631 and the holding portion 632. The arm portion 633 has a partially bent shape. In the second spring 63, the arm portion 633 functions more as a spring than the base portion 631 and the holding portion 632. Thus, the second spring 63 has a base portion 631 at the first end and a holding portion 632 at the second end. A portion of the second spring 63 between the base portion 631 and the holding portion 632 becomes an arm portion 633. The second spring 63 is arranged so that its length direction intersects with a predetermined direction. The first end and the second end are both ends of the second spring 63 in the length direction.

The first spring 62 has a fixed part 621, a movable part 622, and a connecting part 623, as shown in FIGS. 4 to 12. The first spring 62 has conductivity and elasticity. The first spring 62 is thicker than the second spring 63. In this embodiment, the second spring 63 is a laminate of a plurality of (three in this embodiment) leaf springs 630. In this case, the thickness of the second spring 63 may be defined as the total thickness of the plurality of leaf springs 630.

The fixing part 621 is a part of the first spring 62 that is fixed to the second spring 63 (holding part 632). The fixing portion 621 has a rectangular plate shape. As shown in FIG. 12, the fixing part 621 has a first collision part 6211 at a first end in the length direction (lower end in FIG. 12), and a first collision part 6211 at a second end in the length direction (upper end in FIG. 12). 1 curved portion 6212. The first collision part 6211 is a part of the fixed part 621 that can come into contact with the movable part 622. In particular, the first collision part 6211 can come into contact with a second collision part 6224 of the movable part 622, which will be described later. The first curved portion 6212 is a portion of the fixed portion 621 that is connected to the connecting portion 623. The first curved portion 6212 has a curved shape and has a first radius of curvature.

The fixed part 621 has a (first) attachment hole 621a for attaching the movable contact 61. The movable contact 61 is fixed to the second spring 63 by passing the movable contact 61 through the first mounting hole 621a of the fixed part 621 and the second mounting hole 632a of the second spring 63. . More specifically, the fixed part 621 is arranged on the surface of the holding part 632 that faces the fixed contact 41. At this time, the second attachment hole 632a overlaps with the first attachment hole 621a in a predetermined direction (the left-right direction in FIGS. 13 and 14). Thereafter, the movable contact 61 is passed through the first mounting hole 621a of the fixed part 621 and the second mounting hole 632a of the holding part 632, and the end of the movable contact 61 opposite to the fixed contact 41 is flattened. 61 and the first spring 62 are fixed to the second spring 63. For example, the movable contact 61 and the second spring 63 are fixed to the second spring 63 by caulking. Therefore, the fixed part 621 (the first spring 62) is more fixed contact than the second spring 63 (in this embodiment, the holding part 632 of the second spring 63) in a predetermined direction (the left-right direction in FIGS. 13 and 14). 41 and is fixed to the second spring 63 (holding portion 632).

The movable part 622 is a part whose position relative to the fixed part 621 changes according to the force from the movable member 73. As shown in FIGS. 4 and 11, the movable portion 622 includes a pair of arm portions 6221, 6221, a first connecting portion 6222, a pair of second curved portions 6223, 6223, a second collision portion 6224, and a pressure receiving portion. 6225 and a second connecting portion 6226.

The pair of arm portions 6221, 6221 are located on both sides of the fixed portion 621 (both sides in the direction corresponding to the width direction of the second spring 63). The pair of arm portions 6221, 6221 have the same shape. The pair of arm portions 6221, 6221 are parallel to each other.

The first connecting portion 6222 connects the first ends (lower ends in FIG. 11) of the pair of arm portions 6221, 6221.

The pair of second curved portions 6223, 6223 are portions of the movable portion 622 that are connected to the connecting portion 623. More specifically, the pair of second curved portions 6223 , 6223 connect the second ends of the pair of arm portions 6221 , 6221 to the connecting portion 623 . That is, the pair of second curved parts 6223, 6223 extend from the second ends of the pair of arm parts 6221, 6221, respectively. The pair of arm portions 6221, 6221 have the same shape. Each of the pair of second curved portions 6223, 6223 has a curved shape and has a second radius of curvature. Here, the second radius of curvature is smaller than the first radius of curvature. That is, the second curved portion 6223 has a smaller radius of curvature than the first curved portion 6212 (see FIG. 12).

The pair of arm portions 6221, 6221, the first connecting portion 6222, and the pair of second curved portions 6223, 6223 constitute a U-shaped portion surrounding three sides of the fixed portion 621 in the first spring 62. . The pair of arm parts 6221, 6221, the first connecting part 6222, and the pair of second curved parts 6223, 6223 form an opening 6203 that exposes the fixing part 621. Since the movable contact 61 is attached to the fixed part 621, the movable contact 61 is also exposed from the opening 6203. Here, the thickness of the movable part 622 is such that the part of the movable contact 61 that contacts the fixed contact 41 is located closer to the fixed contact 41 than the movable part 622 in a predetermined direction (left-right direction in FIGS. 13 and 14). It is set as follows. That is, the portion of the movable contact 61 that contacts the fixed contact 41 is located closer to the fixed contact 41 than the movable portion 622 in the predetermined direction.

The second collision part 6224 is a part that overlaps with the first collision part 6211 of the fixing part 621 in a predetermined direction (left-right direction in FIGS. 13 and 14) so as to be able to contact when the contact spring 60 is in the first state. That is, the first collision part 6211 and the second collision part 6224 overlap so that they can come into contact with each other. The second collision part 6224 extends from the fixed part 621 side of the first connection part 6222. That is, the second collision part 6224 protrudes from the first connection part 6222 into the opening 6203. As a result, the second collision part 6224 overlaps with the first collision part 6211 of the fixing part 621 in a predetermined direction (the left-right direction in FIGS. 13 and 14) when the contact spring 60 is in the first state. In this embodiment, the second collision part 6224 contacts the first collision part 6211 in the first state.

The pressure receiving portion 6225 is a portion that receives force from the movable member 73. The pressure receiving part 6225 has a rectangular plate shape. The pressure receiving portion 6225 is located at a position that does not overlap with the second spring 63 in a predetermined direction (the left-right direction in FIGS. 13 and 14). The pressure receiving portion 6225 is located further from the fixed contact 41 than the second spring 63 in a predetermined direction (the left-right direction in FIGS. 13 and 14). Note that the pressure receiving part 6225 is arranged parallel to the pair of arm parts 6221.

The second connecting portion 6226 connects the pressure receiving portion 6225 and the first connecting portion 6222 together. More specifically, the second connecting portion 6226 extends from the opposite side of the first connecting portion 6222 from the fixed portion 621 in a direction away from the fixed contact 41. The second connecting portion 6226 is connected to the pressure receiving portion 6225 at its tip.

The connecting portion 623 is a portion that connects the fixed portion 621 and the movable portion 622. The connecting portion 623 has a rectangular plate shape. In FIG. 11, a virtual boundary line between the fixed part 621, the movable part 622, and the connecting part 623 in the first spring 62 is indicated by B1. The fixed part 621 and the movable part 622 are connected to the same side of the connecting part 623 in the width direction. Here, the pair of second curved parts 6223, 6223 of the movable part 622 are connected to both ends of the connecting part 623 in the length direction, and the first curved part 6212 of the fixed part 621 is connected to the center of the connecting part 623 in the length direction. Concatenated. This positions the fixed part 621 within the opening 6203 of the movable part 622. The first curved portion 6212 is curved so that the fixed portion 621 extends along the thickness direction of the connecting portion 623. Further, the pair of second curved parts 6223, 6223 are curved so that the pair of arm parts 6221, 6221 of the movable part 622 extend along the thickness direction of the connecting part 623. The first curved part 6212 and the pair of second curved parts 6223, 6223 are arranged so that the movable part 622 is located closer to the fixed contact 41 than the fixed part 621 in a predetermined direction (the left-right direction in FIGS. 13 and 14). It is formed. As a result, the pair of arm portions 6221, 6221 of the movable portion 622 are positioned closer to the fixed contact 41 than the fixed portion 621 is. Therefore, the movable part 622 (particularly the pair of arm parts 6221, 6221) functions as a part for receiving the arc generated between the fixed contact 41 and the movable contact 61. The second collision part 6224 of the movable part 622 is located closer to the fixed contact 41 than the first collision part 6211 of the fixed part 621 .

In the first spring 62, the movable part 622 contacts the fixed part 621 in the first state and separates from the fixed part 621 in the second state. More specifically, in the first state, the second collision part 6224 of the movable part 622 contacts the first collision part 6211 of the fixed part 621. On the other hand, in the second state, the second collision part 6224 of the movable part 622 separates from the first collision part 6211 of the fixed part 621. In other words, the movable part 622 is a part (overtravel part) where the contact spring 60 deforms and the movable contact 61 further moves in the direction toward the fixed contact 41 from the state where the movable contact 61 is in contact with the fixed contact 41. be. In the movable portion 622, the position relative to the fixed portion 621 changes mainly due to elastic deformation of the pair of arm portions 6221, 6221 and the pair of second curved portions 6223, 6223. In particular, the pair of arm parts 6221, 6221 are connected to the connecting part 623 by a pair of second curved parts 6223, 6223. Therefore, the movable part 622 changes its position relative to the fixed part 621 by elastically deforming using the connecting part 623 as a fulcrum in response to the force from the movable member 73.

In this embodiment, the first spring 62 is made of an elastic metal material. In particular, the first spring 62 may be formed by punching and bending a metal plate having a uniform thickness. Therefore, the fixed part 621, the movable part 622, and the connecting part 623 are formed continuously and integrally. Moreover, the fixed part 621, the movable part 622, and the connecting part 623 are made of the same material. The fixed part 621, the movable part 622, and the connecting part 623 have the same thickness.

Here, an example of a method for manufacturing the first spring 62 will be described with reference to FIGS. 5 to 12. As shown in FIGS. 5 and 6, a metal plate that is the material of the first spring 62 is punched and bent to form parts that will become the fixed part 621, the movable part 622, and the connecting part 623. Here, openings 6201, 6201 are formed between the fixing part 621 and the pair of arm parts 6221, 6221, and the openings 6201, 6201 are connected to each other by a slit 6202. Next, the fixed portion 621 is bent along the straight line L1. In particular, the fixing portion 621 is bent along the straight line L1 toward the second spring 63 (to the right in FIG. 6). The straight line L1 is a straight line along the length direction of the connecting portion 623. At this time, the movable portion 622 is not bent. As a result, an opening 6203 is formed in the movable portion 622, as shown in FIGS. 7 and 8. Next, as shown in FIGS. 9 and 10, the movable portion 622 is bent along the straight line L2. In particular, the movable portion 622 is bent along the straight line L2 toward the second spring 63 (to the right in FIG. 10). The straight line L2 is a straight line along the length direction of the connecting portion 623, but is located further from the connecting portion 623 than the straight line L1. In this way, the fixed part 621 and the movable part 622 are bent along straight lines L1 and L2 that are parallel to each other, respectively. Here, since the straight line L2 is located further from the connecting portion 623 than the straight line L1, the fixed portion 621 is located closer to the second spring 63 than the movable portion 622. As a result, the first collision part 6211 of the fixed part 621 hits the surface of the second collision part 6224 of the movable part 622 on the second spring 63 side. When the movable part 622 is further bent along the straight line L2 from here, the fixed part 621 is also bent together with the movable part 622. As a result, a first spring 62 as shown in FIGS. 11 and 12 is obtained. In this way, in this embodiment, by punching and bending a metal plate, the first spring 62, which includes the first collision part 6211 on the fixed part 621 and the second collision part 6224 on the movable part 622, can be easily formed. It becomes possible to manufacture

In the contact spring 60, the second spring 63 has a base portion 631 that does not displace between the first state and the second state, and the movable contact 61 has a base portion 631 that does not displace between the first state and the second state. between. Therefore, when the pressure receiving portion 6225 receives force from the movable member 73, the force can be efficiently applied to the movable contact 61 by the contact spring 60. Further, the second spring 63 is composed of one or more leaf springs 630 and has a base 631 at a first end. The first spring 62 is fixed to the second end of the second spring 63. The movable contact 61 is held by the second spring 63 via the fixed part 621. The pressure receiving part 6225 is located on the opposite side of the connecting part 623 with respect to the movable contact 61. That is, the movable portion 622 receives the force from the movable member 73 on the side opposite to the connecting portion 623 with respect to the movable contact 61 . That is, the fixed portion 621 is located between the pressure receiving portion 6225 and the base portion 631 when viewed from a predetermined direction (that is, the direction in which the fixed contact 41 and the movable contact 61 face each other). Therefore, when the pressure receiving portion 6225 receives force from the movable member 73, the force can be applied more efficiently to the movable contact 61 by the contact spring 60.

As shown in FIGS. 2, 3, and 13, the drive device 70 includes an electromagnet device 71, an armature 72, a movable member 73, a hinge spring 74, a pair of connection wires 75, and a connector 76. and has. The drive device 70 is a device for switching the contact device 10 between an on state and an off state.

The electromagnet device 71 includes a bobbin 711 , a coil 712 formed by winding a wire around the bobbin 711 , an iron core 713 disposed at the center of the bobbin 711 , and a yoke 714 . As shown in FIG. 13, the bobbin 711 has a cylindrical body 711a around which a coil 712 is wound. The bobbin 711 further includes a first flange 711b provided at one end in the axial direction of the body 711a (left side in FIG. 13), and a first collar 711b provided at the other end in the axial direction of the body 711a (right side in FIG. 13). It has a second flange portion 711c. In this embodiment, the bobbin 711 is a molded product made of an insulating resin material, and has a body 711a, a first flange 711b, and a second flange 711c integrally formed. The first flange portion 711b has a rectangular plate shape. A pair of coil terminals each electrically connected to both ends of the coil 712 is provided on the first flange portion 711b. The pair of connecting wires 75 are electrically connected to the pair of coil terminals at their respective first ends, and are electrically connected to the connector 76 at their respective second ends. The second flange portion 711c has a rectangular plate shape. The second collar portion 711c holds the yoke 714. The yoke 714 extends from the second flange 711c toward the first flange 711b.

The armature 72 has a long plate shape. As shown in FIG. 3, the armature 72 has a suction piece 721 at one end in the length direction, and a drive piece 722 at the other end in the length direction. Armature 72 is made of magnetic material. Armature 72 is attached to yoke 714 by hinge spring 74. More specifically, as shown in FIG. 3, the armature 72 is attached to the yoke 714 so that the suction piece 721 faces the suction portion at one end (the left end in FIG. 3) of the iron core 713. Furthermore, the central portion of the armature 72 in the length direction is in contact with the end of the yoke 714, and the armature 72 can swing around the end of the yoke 714 as a fulcrum. In particular, the armature 72 has two positions: a first position (see FIG. 13) where the suction piece 721 is away from the suction part of the iron core 713 and a second position (see FIG. 14) where the suction piece 721 contacts the suction part of the iron core 713. The yoke 714 is attached to the yoke 714 so as to be able to swing between the two. The hinge spring 74 holds the armature 72 swingably relative to the iron core 713. Hinge spring 74 holds armature 72 in the first position due to its elasticity. When current flows through the coil 712 of the electromagnet device 71, the coil 712 generates magnetic flux. As a result, the suction piece 721 of the armature 72 is drawn to the suction portion of the iron core 713. As a result, the armature 72 rotates using the end of the yoke 714 as a fulcrum and moves from the first position to the second position. When current no longer flows through the coil 712 of the electromagnet device 71, the coil 712 no longer generates magnetic flux. As a result, the suction piece 721 of the armature 72 is no longer attracted to the suction portion of the iron core 713. As a result, the elasticity of the hinge spring 74 causes the armature 72 to return from the second position to the first position. In this manner, armature 72 moves in response to the magnetic flux generated by coil 712.

As shown in FIG. 3, the movable member 73 has a long plate shape. The movable member 73 is a so-called card. In this embodiment, the movable member 73 has elasticity. The movable member 73 is made of an elastic material (metal material). The movable member 73 includes a first fixed piece 731, a second fixed piece 732, and a connecting piece 733 that connects the first fixed piece 731 and the second fixed piece 732. The first fixed piece 731 is fixed to the drive piece 722 of the armature 72. The second fixed piece 732 is fixed to the movable part 622 of the second spring 63. The movable member 73 may be fixed to the armature 72 and the movable portion 622 by caulking or the like. In this way, the movable member 73 connects the armature 72 and the movable portion 622. Since the movable member 73 is fixed to the armature 72 by the first fixed piece 731, it moves in accordance with the movement of the armature 72. Therefore, the movable portion 622 of the second spring 63 receives force from the movable member 73 in accordance with the movement of the armature 72. In this embodiment, the movable member 73 has elasticity (spring properties) and connects the armature 72 and the movable portion 622 of the contact spring 60. Therefore, compared to the case where the movable member 73 is slidably hooked on the armature 72 and the movable portion 622 of the contact spring 60, abrasion powder is not generated due to sliding. As a result, the contact device 10 of this embodiment can improve reliability.

The holder 80 is configured to hold the first terminal 40, the second terminal 50 (and the contact spring 60 fixed to the second terminal 50), and the drive device 70. That is, the holder 80 determines the positional relationship between the first terminal 40, the second terminal 50, and the drive device 70. The holder 80 is a molded product made of an insulating resin material. The holder 80 has a bottom wall 81, a first vertical wall 82, a second vertical wall 83, a third vertical wall 84, a fourth vertical wall 85, and a fifth vertical wall 86, as shown in FIG. The bottom wall 81 has a rectangular flat plate shape. The first vertical wall 82 to the fifth vertical wall 86 are all approximately rectangular and flat, and protrude from one surface of the bottom wall 81 in the thickness direction in the same direction. The first vertical wall 82, the second vertical wall 83, and the third vertical wall 84 are lined up at the first end of the bottom wall 81 in the length direction, parallel to the width direction of the bottom wall 81, and spaced apart from each other. The fourth vertical wall 85 and the fifth vertical wall 86 are lined up at the second end of the bottom wall 81 in the length direction in parallel and spaced apart from each other along the length direction of the bottom wall 81 . As shown in FIG. 13, the holder 80 holds the drive device 70 by sandwiching the yoke 714 of the drive device 70 between the first vertical wall 82 and the second vertical wall 83. Furthermore, the holder 80 holds the first terminal 40 by sandwiching the connecting piece 423 of the first terminal 40 between the second vertical wall 83 and the third vertical wall 84 . The holder 80 holds the second terminal 50 by sandwiching the connecting piece 503 of the second terminal 50 between the fourth vertical wall 85 and the fifth vertical wall 86 . As a result, as shown in FIG. 13, the holder 80 is arranged so that the fixed contact 41 of the first terminal 40 faces the movable contact 61 of the contact spring 60 fixed to the second terminal 50 in a predetermined direction. The terminal 40 and the second terminal 50 are held. Further, the holder 80 holds the drive device 70 such that the coil 712 is located between the armature 72 and the second terminal 50.

The arc extinguishing member 90 is a member for promoting extinguishing of an arc that may occur between the fixed contact 41 and the movable contact 61. The arc extinguishing member 90 includes a permanent magnet 91 and a yoke 92, as shown in FIG. The arc extinguishing member 90 extinguishes the arc by forming a magnetic flux around the fixed contact 41 and the movable contact 61 by the permanent magnet 91 and the yoke 92, and by stretching the arc with the electromagnetic force generated by the interaction between the magnetic flux and the arc. Extinguish the arc. The permanent magnet 91 has a rectangular flat plate shape. The permanent magnet 91 has different magnetic poles on both sides in the thickness direction. The yoke 92 has a first piece 921 and a second piece 922 protruding from one end of the first piece 921 at a right angle. Yoke 92 is L-shaped. Permanent magnet 91 is fixed to first piece 921 of yoke 92 . With respect to the first piece 921, the permanent magnet 91 is on the same side as the second piece 922.

Case 30 is configured to house circuit block 20. The case 30 has a body 31 and a cover 32, as shown in FIGS. 1 and 2. The body 31 and cover 32 have insulation properties. In this embodiment, the body 31 and the cover 32 are molded products made of an insulating resin material. The body 31 has a rectangular box shape. The body 31 has an opening over one entire surface. The body 31 has openings 311 and 312 for allowing the terminal piece 422 of the first terminal 40 and the terminal piece 502 of the second terminal 50 to protrude to the outside. Further, the body 31 has a pair of holes 313 for allowing a pair of connection wires 75 connected to the coil 712 of the drive device 70 to protrude outside. The cover 32 has a rectangular box shape. The cover 32 is attached to the body 31 so as to cover the entire opening of the body 31. The space between the body 31 and the cover 32 serves as a space for accommodating the circuit block 20. In this embodiment, the cover 32 has a housing portion 321 on the surface opposite to the body 31. The accommodating portion 321 is a part for accommodating the arc extinguishing member 90. As shown in FIG. 5, the housing portion 321 is formed on the cover 32 so that the arc extinguishing member 90 is located in a space surrounded by the armature 72, the yoke 714, the contact spring 60, and the movable member 73. has been done. However, the space within the housing portion 321 is not connected to the space between the body 31 and the cover 32. That is, the arc extinguishing member 90 is arranged in a space electrically insulated from the first terminal 40, the second terminal 50, the contact spring 60, the drive device 70, and the holder 80.

1.3 Operation Next, the operation of the contact device 10 will be described with reference to FIGS. 13 to 16. Here, in FIG. 13, the contact device 10 is in an off state in which the movable contact 61 is separated from the fixed contact 41. In the off state, the coil 712 of the drive device 70 is not energized, the armature 72 is in the first position, and the contact spring 60 is in the first state. In FIG. 14 , the contact device 10 is in an on state in which the movable contact 61 is in contact with the fixed contact 41 . In the on state, the coil 712 of the drive device 70 is energized, the armature 72 is in the second position, and the contact spring 60 is in the second state.

First, the operation of the contact device 10 from an off state to an on state will be described. When the contact device 10 is in the OFF state (see FIG. 13), when a current is applied to the coil 712 of the drive device 70 to excite the coil 712, the armature 72 moves from the first position to the second position. Along with this, the movable member 73 moves in the direction from the movable contact 61 toward the fixed contact 41 (leftward in FIG. 13). Due to the movement of the movable member 73, the pressure receiving portion 6225 of the first spring 62 receives a force from the movable member 73 in a direction from the movable contact 61 toward the fixed contact 41, as shown by the black arrow in FIG. In FIG. 15, the left diagram shows the contact spring 60 in the first state, the right diagram shows the contact spring 60 in the second state, and the center diagram shows the contact spring 60 in the second state. A state in the middle of transition from the first state to the second state is shown. Since the first spring 62 is fixed to the holding part 632 of the second spring 63 by the fixed part 621, when the movable part 622 of the first spring 62 moves toward the fixed contact 41, the holding part 632 of the second spring 63 moves. It is pulled by the first spring 62. As a result, the second spring 63 is deformed so that the holding portion 632 moves toward the fixed contact 41, and the movable contact 61 approaches the fixed contact 41. In the first spring 62, the movable part 622 is connected to the fixed part 621 via the connecting part 623. Therefore, in the process of the contact spring 60 changing from the first state to the second state, the movable part 622 connects to the fixed part 621. deform to move away from. In addition, in the process in which the contact spring 60 changes from the first state to the second state, the movable contact 61 is separated from the fixed contact 41, and the movable part 622 (second collision part 6224) moves into the fixed part 621 (first collision part 6224). 6211). When the contact spring 60 is in the second state, the movable part 622 is located away from the fixed part 621. In this way, the contact device 10 changes from the off state to the on state. In this way, the contact spring 60 receives the force from the movable member 73 and shifts from the first state to the second state, so the contact device 10 is a normally open contact device. In the contact device 10, the force from the movable member 73 is partially absorbed by the first spring 62 and transmitted to the second spring 63. That is, the movable contact 61 contacts the fixed contact 41 by deforming the first spring 62 and the second spring 63 . Thereby, in the contact spring 60, the possibility that the first spring 62 and the second spring 63 are irreversibly distorted is reduced. Therefore, the possibility that the movable contact 61 will not be brought into contact with and separated from the fixed contact 41 correctly is also reduced. Therefore, according to the contact device 10, the reliability of the contact/separation operations of the contacts can be improved.

Next, the operation of the contact device 10 from the on state to the off state will be described. When the contact device 10 is in the ON state (see FIG. 14), when the current is stopped flowing through the coil 712 of the drive device 70 (when the excitation of the coil 712 is stopped), the armature 72 changes from the second position to the first position. Move to. Along with this, the movable member 73 moves in the direction from the fixed contact 41 toward the movable contact 61 (rightward in FIG. 14). Due to the movement of the movable member 73, the pressure receiving portion 6225 of the first spring 62 receives a force from the movable member 73 in a direction from the fixed contact 41 toward the movable contact 61, as shown by the black arrow in FIG. In FIG. 14, the left diagram shows the contact spring 60 in the second state, the right diagram shows the contact spring 60 in the first state, and the center diagram shows the contact spring 60 in the first state. It shows a state in the middle of transition from state 2 to state 1. In particular, when the pressure receiving part 6225 no longer receives the force from the movable member 73 in the direction from the movable contact 61 toward the fixed contact 41, in the contact spring 60, the second spring 63 tries to return to its original shape due to its elasticity. Therefore, the second spring 63 deforms so that the holding portion 632 moves away from the fixed contact 41, and the movable contact 61 moves away from the fixed contact 41. In the first spring 62, in the process of the contact spring 60 changing from the second state to the first state, the movable part 622 tries to return to its original shape due to its elasticity. Therefore, the movable part 622 deforms so as to approach the fixed part 621 side (that is, the holding part 632 side). As a result, the second collision part 6224 of the movable part 622 collides with the first collision part 6211 of the fixed part 621. This collision accelerates the movement of the holding portion 632 in the direction away from the fixed contact 41. In particular, in this embodiment, since the first spring 62 is thicker than the second spring 63, it is possible to apply impact efficiently. Furthermore, in this embodiment, as shown in FIG. 16, the movable part 622 (second collision part 6224) causes the movable contact 61 to separate from the fixed contact 41 in the process of the contact spring 60 changing from the second state to the first state. After that, it contacts the fixed part 621 (first collision part 6211). In short, the second collision part 6224 contacts the first collision part 6211 before the movable contact 61 moves away from the fixed contact 41 to the initial position. Therefore, when the contact spring 60 transitions from the second state to the first state, the movable contact 61 can be separated from the fixed contact 41 to a predetermined position in a shorter time, and the movable contact 61 is welded to the fixed contact 41. Possibility can be reduced. Note that the predetermined position is assumed to be a position where the arc generated between the movable contact 61 and the fixed contact 41 disappears. The predetermined position is closer to the fixed contact 41 than the initial position. In this way, the contact device 10 changes from the on state to the off state. In the contact device 10, the force from the movable member 73 is partially absorbed by the first spring 62 and transmitted to the second spring 63. That is, the two springs, the first spring 62 and the second spring 63, are deformed, so that the movable contact 61 is separated from the fixed contact 41. Thereby, in the contact spring 60, the possibility that the first spring 62 and the second spring 63 are irreversibly distorted is reduced. Therefore, the possibility that the movable contact 61 will not be brought into contact with and separated from the fixed contact 41 correctly is also reduced. Therefore, according to the contact device 10, the reliability of the contact/separation operations of the contacts can be improved.

2. Modifications Embodiments of the present disclosure are not limited to the above embodiments. The embodiments described above can be modified in various ways depending on the design, etc., as long as the objective of the present disclosure can be achieved. Modifications of the above embodiment are listed below.

In the above embodiments, "contact" means "direct contact." However, in the present disclosure, "contact" is not limited to "direct contact" and may include "indirect contact" which is equivalent to direct contact.

In one variation, in the contact device 10, the movable portion 622 (second collision portion 6224) does not necessarily move after the movable contact 61 separates from the fixed contact 41 in the process of the contact spring 60 changing from the second state to the first state. It is not necessary to contact the fixed part 621 (first collision part 6211). For example, FIG. 17 shows the operation of the contact device 10 of a modified example. In FIG. 17, the left diagram shows the contact spring 60 in the second state, the right diagram shows the contact spring 60 in the first state, and the center diagram shows the contact spring 60 in the first state. It shows a state in the middle of transition from state 2 to state 1. In FIG. 17, the movable part 622 (second collision part 6224) collides with the fixed part 621 (first collision part 6211) with the movable contact 61 in contact with the fixed contact 41. This collision accelerates the movement of the fixed part 621 in the direction away from the fixed contact 41. In other words, the movable part 622 (second collision part 6224) collides with the fixed part 621 (first collision part 6211) before the movable contact 61 separates from the fixed contact 41 in the process of the contact spring 60 changing from the second state to the first state. may be contacted. Even in this case, when the contact spring 60 transitions from the second state to the first state, the movable contact 61 can be separated from the fixed contact 41 to a predetermined position in a shorter time, and the movable contact 61 is fixed. The possibility of welding to the contact point 41 can be reduced. The movable part 622 (second collision part 6224) only needs to contact the fixed part 621 (first collision part 6211) during the process of the contact spring 60 changing from the second state to the first state, and the timing is not particularly limited. . Therefore, the movable part 622 (second collision part 6224) is moved to the fixed part 621 (first collision part 6211) at the timing when the movable contact 61 is separated from the fixed contact 41 in the process of the contact spring 60 changing from the second state to the first state. may come into contact with.

FIG. 18 shows the main parts of a contact device 10 of another modification. In FIG. 18, the left diagram shows the contact spring 60 in the first state, the right diagram shows the contact spring 60 in the second state, and the center diagram shows the contact spring 60 in the second state. A state in the middle of transition from the first state to the second state is shown. In FIG. 18, the movable portion 622 of the second spring 63 is pressed in a direction in which the movable contact 61 approaches the fixed contact 41 by the movable member 73A of the drive device 70. That is, the movable portion 622 of the second spring 63 does not need to be physically connected to the movable member 73A, and may simply be in contact with the movable member 73A.

In FIG. 18, when the contact device 10 is in the off state, when a current is applied to the coil 712 of the drive device 70 to excite the coil 712, the armature 72 moves from the first position to the second position. Along with this, the movable member 73A moves in the direction from the movable contact 61 toward the fixed contact 41. Due to the movement of the movable member 73A, the pressure receiving portion 6225 of the first spring 62 receives a force from the movable member 73A in a direction from the movable contact 61 toward the fixed contact 41, as shown by the black arrow in FIG. In the first spring 62, the movable part 622 is connected to the fixed part 621 via the connecting part 623, and the first spring 62 is fixed to the holding part 632 of the second spring 63 by the fixed part 621. Therefore, when the movable part 622 of the first spring 62 moves toward the fixed contact 41, the holding part 632 of the second spring 63 is pulled by the first spring 62. As a result, the second spring 63 is deformed so that the holding portion 632 moves toward the fixed contact 41, and the movable contact 61 approaches the fixed contact 41. In the process of the contact spring 60 changing from the first state to the second state, the movable part 622 deforms so as to separate from the holding part 632 of the second spring 63. When the contact spring 60 is in the second state, the movable part 622 (second collision part 6224) is located away from the fixed part 621 (first collision part 6211). In this way, the contact device 10 changes from the off state to the on state. In the contact device 10, the force from the movable member 73 is partially absorbed by the first spring 62 and transmitted to the second spring 63. That is, the movable contact 61 contacts the fixed contact 41 by deforming the first spring 62 and the second spring 63 . Thereby, in the contact spring 60, the possibility that the first spring 62 and the second spring 63 are irreversibly distorted is reduced. Therefore, the possibility that the movable contact 61 will not be brought into contact with and separated from the fixed contact 41 correctly is also reduced. Therefore, according to the contact device 10, the reliability of the contact/separation operations of the contacts can be improved.

In FIG. 18, when the contact device 10 is in the ON state, when the current is stopped flowing through the coil 712 of the drive device 70 (when the excitation of the coil 712 is stopped), the armature 72 moves from the second position to the first position. Moving. Along with this, the movable member 73A moves in the direction from the fixed contact 41 toward the movable contact 61. Due to the movement of the movable member 73A, the movable portion 622 of the first spring 62 no longer receives the force directed from the fixed contact 41 toward the movable contact 61 from the movable member 73A. Then, in the contact spring 60, the second spring 63 tries to return to its original shape due to its elasticity. Therefore, the second spring 63 deforms so that the holding portion 632 moves away from the fixed contact 41, and the movable contact 61 moves away from the fixed contact 41. In the first spring 62, in the process of the contact spring 60 changing from the second state to the first state, the movable part 622 tries to return to its original shape due to its elasticity. Therefore, the movable part 622 deforms so as to approach the fixed part 621. As a result, the movable part 622 (second collision part 6224) collides with the fixed part 621 (first collision part 6211). This collision accelerates the movement of the holding portion 632 in the direction away from the fixed contact 41. As a result, when the contact spring 60 transitions from the second state to the first state, the movable contact 61 can be separated from the fixed contact 41 to a predetermined position in a shorter time, and the movable contact 61 is welded to the fixed contact 41. This can reduce the possibility of In this way, the contact device 10 changes from the off state to the on state. In the contact device 10, the force from the movable member 73A is partially absorbed by the first spring 62 and transmitted to the second spring 63. That is, the two springs, the first spring 62 and the second spring 63, are deformed, so that the movable contact 61 is separated from the fixed contact 41. Thereby, in the contact spring 60, the possibility that the first spring 62 and the second spring 63 are irreversibly distorted is reduced. Therefore, the possibility that the movable contact 61 will not be brought into contact with and separated from the fixed contact 41 correctly is also reduced. Therefore, according to the contact device 10, the reliability of the contact/separation operations of the contacts can be improved.

In one variation, the contact device 10 may not include the drive device 70. For example, the contact device 10 may include an operating section that allows the contact spring 60 to be deformed between a first state and a second state by manual operation. In one variation, the contact device 10 may not include the holder 80. For example, the first terminal 40, the second terminal 50, and the drive device 70 of the circuit block 20 may be held by the case 30. In other words, the case 30 may serve as the holder 80. In a modified example, the contact device 10 does not need to include the arc extinguishing member 90.

In other modifications, the shape and number of each member of the contact device 10 can be changed as appropriate. For example, the case 30 does not need to be shaped like a rectangular box, but may be shaped like a circular box or some other box shape. For example, in the first terminal 40, the fixed contact 41 is separate from the terminal board 42, but a part of the terminal board 42 may be used as the fixed contact 41. The shape of the terminal board 42 (for example, the shape of the terminal piece 422) can also be changed as appropriate. For example, the shape of the second terminal 50 (particularly the shape of the terminal piece 502) can also be changed as appropriate.

In one modification, the number of leaf springs 620 in the second spring 63 is not particularly limited. The contact spring 60 does not necessarily have to include the second spring 63.

In one modification, the first spring 62 does not necessarily have to be made of an elastic metal material, and may be made of an elastic and conductive resin material. The fixed part 621, the movable part 622, and the connecting part 623 do not have to be formed continuously and integrally. For example, the movable portion 622 and the fixed portion 621 may be separate parts and may be coupled together by bonding or the like. The fixed part 621, the movable part 622, and the connecting part 623 do not need to be made of the same material. The fixed part 621, the movable part 622, and the connecting part 623 do not have to have the same thickness. The first spring 62 does not necessarily have to be thicker than the second spring 63.

In a modified example, the second collision part 6224 does not necessarily need to be in contact with the first collision part 6211 in the first state. The second collision part 6224 does not necessarily have to separate from the first collision part 6211 during the process of the contact spring 60 changing from the first state to the second state. The second collision part 6224 does not necessarily have to be separated from the first collision part 6211 in the second state. The second collision part 6224 does not necessarily have to come into contact with the first collision part 6211 during the process of the contact spring 60 changing from the second state to the first state.

3. Aspects As is clear from the above embodiments and modifications, the present disclosure includes the following aspects. In the following, reference numerals are given in parentheses only to clearly indicate the correspondence with the embodiments.

The first aspect is a contact device (10) that includes a fixed contact (41) and a contact spring (60). The contact spring (60) includes a movable contact (61) facing the fixed contact (41) in a predetermined direction. The contact spring (60) receives a force from the movable member (73), and operates in a first state in which the movable contact (61) is separated from the fixed contact (41) and in a first state in which the movable contact (61) is separated from the fixed contact. It deforms between the second state in which it is in contact with the contact point (41). The contact spring (60) includes a fixed part (621) to which the movable contact (61) is fixed, and a movable part whose position relative to the fixed part (621) changes depending on the force from the movable member (73). (622). The fixing part (621) includes a first collision part (6211). The movable part (622) is a second collision part that overlaps with the first collision part (6211) of the fixed part (621) in the predetermined direction so as to be able to contact it when the contact spring (60) is in the first state. (6224) included. According to this aspect, the possibility that the movable contact (61) will be welded to the fixed contact (41) can be reduced.

The second aspect is a contact device (10) based on the first aspect. In the second aspect, the movable part (622) is located closer to the fixed contact (41) than the fixed part (621) in the predetermined direction. According to this aspect, the arc can be received by the movable part (622) and extinguished more quickly, and the possibility that the movable contact (61) will be welded to the fixed contact (41) can be reduced.

A third aspect is a contact device (10) based on the first or second aspect. In a third aspect, a portion of the movable contact (61) that contacts the fixed contact (41) is located closer to the fixed contact (41) than the movable portion (622) in the predetermined direction. According to this aspect, the possibility that the movable contact (61) will be welded to the fixed contact (41) can be reduced.

A fourth aspect is a contact device (10) based on any one of the first to third aspects. In a fourth aspect, the fixed part (621) and the movable part (622) are made of the same material. According to this aspect, the structure can be simplified.

A fifth aspect is a contact device (10) based on any one of the first to fourth aspects. In a fifth aspect, the fixed part (621) and the movable part (622) have the same thickness. According to this aspect, the structure can be simplified.

A sixth aspect is a contact device (10) based on any one of the first to fifth aspects. In a sixth aspect, the fixed part (621) and the movable part (622) are continuous and integral. According to this aspect, the structure can be simplified.

A seventh aspect is a contact device (10) based on any one of the first to sixth aspects. In a seventh aspect, the contact spring (60) includes a first spring (62) and a second spring (63). The first spring (62) includes the fixed part (621) and the movable part (622). The second spring (63) receives a force from the movable member (73) via the first spring (62) to move the movable contact (61) relative to the fixed contact (41). According to this aspect, the reliability of the contact/separation operations of the contacts can be improved.

An eighth aspect is a contact device (10) based on the seventh aspect. In an eighth aspect, the first spring (62) is located closer to the fixed contact (41) than the second spring (63) in the predetermined direction. According to this aspect, the reliability of the contact/separation operations of the contacts can be improved.

A ninth aspect is a contact device (10) based on the seventh or eighth aspect. In a ninth aspect, the first spring (62) is fixed to the second spring (63) with the fixing part (621) overlapping the second spring (63) in the predetermined direction. According to this aspect, the structure can be simplified.

A tenth aspect is a contact device (10) based on the ninth aspect. In a tenth aspect, the fixing part (621) includes a first attachment hole (621a). The second spring (63) includes a second attachment hole (632a) that overlaps the first attachment hole (621a) in the predetermined direction. By passing the movable contact (61) through the first attachment hole (621a) of the fixed part (621) and the second attachment hole (632a) of the second spring (63), The movable contact (61) and the fixed part (621) are fixed to the second spring (63). According to this aspect, the structure can be simplified.

An eleventh aspect is a contact device (10) based on any one of the seventh to tenth aspects. In an eleventh aspect, the first spring (62) is thicker than the second spring (63). According to this aspect, when the contact spring (60) transitions from the second state to the first state, the movable contact (61) can be separated from the fixed contact (41) to a predetermined position in a shorter time, The possibility that the movable contact (61) will be welded to the fixed contact (41) can be reduced.

A twelfth aspect is a contact device (10) based on any one of the first to eleventh aspects. In a twelfth aspect, the second collision part (6224) contacts the first collision part (6211) in the first state. According to this aspect, the possibility that the movable contact (61) will be welded to the fixed contact (41) can be reduced.

A thirteenth aspect is a contact device (10) based on the twelfth aspect. In a thirteenth aspect, the second collision part (6224) separates from the first collision part (6211) in the process of the contact spring (60) changing from the first state to the second state. According to this aspect, the possibility that the movable contact (61) will be welded to the fixed contact (41) can be reduced.

A fourteenth aspect is a contact device (10) based on any one of the first to thirteenth aspects. In a fourteenth aspect, the second collision part (6224) is separated from the first collision part (6211) in the second state. According to this aspect, the possibility that the movable contact (61) will be welded to the fixed contact (41) can be reduced.

A fifteenth aspect is a contact device (10) based on the fourteenth aspect. In a fifteenth aspect, the first state is a state in which the movable contact is at an initial position away from the fixed contact. The second collision part (6224) contacts the first collision part (6211) while the contact spring (60) changes from the second state to the first state. According to this aspect, when the contact spring (60) transitions from the second state to the first state, the movable contact (61) can be separated from the fixed contact (41) to a predetermined position in a shorter time, The possibility that the movable contact (61) will be welded to the fixed contact (41) can be reduced.

A sixteenth aspect is a contact device (10) based on any one of the first to fifteenth aspects. In a sixteenth aspect, the contact spring (60) further includes a connecting portion (623) that connects the fixed portion (621) and the movable portion (622). The movable part (622) changes its position relative to the fixed part (621) by elastically deforming using the connecting part (623) as a fulcrum in response to the force from the movable member (73). According to this aspect, the structure can be simplified.

A seventeenth aspect is a contact device (10) based on the sixteenth aspect. In a seventeenth aspect, the movable part (622) receives a force from the movable member (73) on a side opposite to the coupling part (623) with respect to the movable contact (61). According to this aspect, when the movable portion (622) receives force from the movable member (73), the force can be efficiently applied to the movable contact (61) by the contact spring (60).

An eighteenth aspect is a contact device (10) based on the sixteenth or seventeenth aspect. In an eighteenth aspect, the fixing part (621) includes a first curved part (6212) connected to the connecting part (623). The movable part (622) includes a second curved part (6223) connected to the connecting part (623). According to this aspect, the elastic change of the movable portion (622) can be facilitated.

A nineteenth aspect is a contact device (10) based on the eighteenth aspect. In the nineteenth aspect, the second curved portion (6223) has a larger radius of curvature than the first curved portion (6212). According to this aspect, the elastic change of the movable portion (622) can be facilitated.

A twentieth aspect is a contact device (10) based on any one of the first to nineteenth aspects. In a twentieth aspect, the contact device (10) further includes a drive device (70). The drive device (70) includes a coil (712), an armature (72) that moves according to the magnetic flux generated by the coil (712), and the movable member (72) that moves according to the movement of the armature (72). 73). According to this aspect, electrical control of the contact device (10) becomes possible.

Note that the second to twentieth aspects are not essential and may be omitted as appropriate.

10 Contact device 41 Fixed contact 60 Contact spring 61 Movable contact 62 First spring 621 Fixed part 621a First mounting hole 6211 First collision part 6212 First curved part 622 Movable part 6223 Second curved part 6224 Second collision part 623 Connection part 63 Second spring 632a Second mounting hole 70 Drive device 712 Coil 72 Armature 73 Movable member

Claims (19)

fixed contacts,
A first state includes a movable contact facing the fixed contact in a predetermined direction, and a first state in which the movable contact is separated from the fixed contact under the force of a movable member, and a first state in which the movable contact is in contact with the fixed contact. a contact spring that deforms between a second state and a second state;
Equipped with
The contact spring is
a first spring including a fixed part to which the movable contact is fixed; and a movable part whose position relative to the fixed part changes according to a force from the movable member;
a second spring that receives a force from the movable member via the first spring to move the movable contact relative to the fixed contact;
Equipped with
The fixing part includes a first collision part,
The movable part includes a second collision part that overlaps the first collision part of the fixed part in the predetermined direction so as to be able to contact the first collision part when the contact spring is in the first state.
Contact device. the first spring is located closer to the fixed contact than the second spring in the predetermined direction;
A contact device according to claim 1. The first spring is fixed to the second spring with the fixing part overlapping the second spring in the predetermined direction.
A contact device according to claim 1 or 2. The fixing part includes a first attachment hole,
The second spring includes a second mounting hole that overlaps the first mounting hole in the predetermined direction,
The movable contact is fixed to the second spring by passing the movable contact through a first mounting hole of the fixed part and a second mounting hole of the second spring.
A contact device according to claim 3. the first spring is thicker than the second spring;
A contact device according to any one of claims 1 to 4. fixed contacts,
A first state includes a movable contact facing the fixed contact in a predetermined direction, and a first state in which the movable contact is separated from the fixed contact under the force of a movable member, and a first state in which the movable contact is in contact with the fixed contact. a contact spring that deforms between a second state and a second state;
Equipped with
The contact spring is
a fixed part to which the movable contact is fixed;
a movable part whose position relative to the fixed part changes according to a force from the movable member;
a connecting part that connects the fixed part and the movable part;
including;
The fixing part includes a first collision part,
The movable part is
a second collision part that overlaps the first collision part of the fixed part in the predetermined direction so as to be able to contact the first collision part when the contact spring is in the first state;
The position relative to the fixed part changes by elastically deforming using the connecting part as a fulcrum in response to a force from the movable member.
Contact device. The movable part receives a force from the movable member on a side opposite to the connecting part with respect to the movable contact.
The contact device according to claim 6. The fixing part includes a first curved part connected to the connecting part,
The movable part includes a second curved part connected to the connecting part.
The contact device according to claim 6 or 7. The second curved portion has a smaller radius of curvature than the first curved portion.
The contact device according to claim 8. The movable part is located closer to the fixed contact than the fixed part in the predetermined direction.
A contact device according to any one of claims 1 to 9. The movable contact has a portion that contacts the fixed contact at a position closer to the fixed contact than the movable portion in the predetermined direction.
A contact device according to any one of claims 1 to 10. The fixed part and the movable part are made of the same material,
A contact device according to any one of claims 1 to 11. the fixed part and the movable part have the same thickness;
A contact device according to any one of claims 1 to 12. the fixed part and the movable part are continuous and integral;
A contact device according to any one of claims 1 to 13. the second collision part contacts the first collision part in the first state;
A contact device according to any one of claims 1 to 14. The second collision part separates from the first collision part in the process of the contact spring changing from the first state to the second state.
The contact device according to claim 15. the second collision part is separated from the first collision part in the second state;
A contact device according to any one of claims 1 to 16. The first state is a state in which the movable contact is at an initial position away from the fixed contact,
The second collision part contacts the first collision part in the process of the contact spring changing from the second state to the first state.
The contact device according to claim 17. further comprising a drive device,
The drive device includes a coil, an armature that moves due to the magnetic force generated by the coil, and the movable member that moves according to the movement of the armature.
A contact device according to any one of claims 1 to 18.

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