JP7050650B2 - Electromagnetic relay - Google Patents

Description

The present invention relates to an electromagnetic relay capable of opening and closing a plurality of circuits.

Conventionally, an electromagnetic relay having a simplified configuration or a miniaturized configuration so that it can be incorporated in a small distribution board or an instrument box is known. Patent Document 1 describes contact and contact between a plurality of fixed contacts and a plurality of movable contacts by an actuator having one mover operated by excitation of an exciting coil and one crossbar movable together with the mover. An electromagnetic relay that can be released is disclosed. According to the technique of Patent Document 1, it is possible to make the actuator configuration simpler and smaller than in the case where a plurality of movers and a plurality of crossbars are required. The electromagnetic relay of Patent Document 1 can open and close a plurality of circuits with a simple and compact configuration.

Japanese Unexamined Patent Publication No. 2009-26651

When the actuator is required to improve the holding force for magnetically holding the contact state, that is, the latching force due to changes in the specifications required for the electromagnetic relay, an actuator with high magnetic characteristics is required. Will be. The actuator may improve its magnetic properties by increasing the amount of magnetic flux or increasing the cross-sectional area of the mover by replacing the permanent magnets provided in the actuator. However, with an actuator having a small configuration, it is difficult to increase the amount of magnetic flux by exchanging permanent magnets and to increase the cross-sectional area of the mover from the viewpoint of dimensional restrictions or cost. Therefore, the conventional electromagnetic relay according to Patent Document 1 has a problem that it is difficult to improve the holding force for magnetically holding the state of contacts due to the small size.

The present invention has been made in view of the above, and an object of the present invention is to obtain an electromagnetic relay capable of easily improving the holding force for magnetically holding the state of contacts by a compact configuration. do.

In order to solve the above-mentioned problems and achieve the object, the electromagnetic relay according to the present invention has a first fixed contact and a first movable contact that face each other, and a second fixed contact and a second movable that face each other. With a contact. The electromagnetic relay according to the present invention is a movable element that causes contact and release of contact between the first fixed contact and the first movable contact, and contact and release of contact between the second fixed contact and the second movable contact. A bobbin having a cylinder in which an exciting coil is wound and an internal space in which the mover is inserted is formed, and a bobbin in which the bobbin is fixed. It comprises an actuator having a yoke, a permanent magnet in contact with the first yoke, and a second yoke in contact with the permanent magnet and provided between the permanent magnet and the bobbin. The bobbin is provided with a notch that is cut out until a part of the cylinder reaches the internal space. The second yoke is arranged at the notch so that a part of the second yoke on the side opposite to the side in contact with the permanent magnet is inserted into the side of the internal space rather than the outer surface of the cylinder.

According to the present invention, there is an effect that the holding force for magnetically holding the state of the contact can be easily improved due to the small size configuration.

A first perspective view showing the appearance of the electromagnetic relay according to the first embodiment of the present invention. A second perspective view showing the appearance of the electromagnetic relay shown in FIG. 1. An exploded perspective view of the electromagnetic relay shown in FIG. A perspective view showing a state in which the first fixed contact side terminal fitting and the second fixed contact side terminal fitting are removed from the housing of the electromagnetic relay shown in FIG. First perspective view of the first fixed contact side terminal fitting shown in FIG. Second perspective view of the first fixed contact side terminal fitting shown in FIG. First perspective view of the first movable contact side terminal fitting shown in FIG. A second perspective view of the first movable contact side terminal fitting shown in FIG. A perspective view showing a state in which the actuator and the terminal fitting holding wall are removed from the case of the housing shown in FIG. A perspective view showing the actuator shown in FIG. A perspective view showing the terminal fitting holding wall shown in FIG. An exploded perspective view of the actuator shown in FIG. A perspective view showing a part of the actuator shown in FIG. 9 and a terminal fitting holding wall. A first perspective view showing a crossbar included in the actuator shown in FIG. A second perspective view showing the crossbar of the actuator shown in FIG. A perspective view showing a state in which the first movable contact side terminal fitting and the second movable contact side terminal fitting are removed from the case shown in FIG. A plan view showing a state in which the electromagnetic relay shown in FIG. 1 is viewed from the side of the cover. Sectional drawing of electromagnetic relay in XVIII-XVIII line shown in FIG. Sectional drawing of the electromagnetic relay in the XIX-XIX line shown in FIG. The first figure explaining the operation of the electromagnetic relay shown in FIG. The second figure explaining the operation of the electromagnetic relay shown in FIG. Sectional drawing of the actuator in line XXII-XXII shown in FIG. Sectional drawing of the actuator in line XXIII-XXIII shown in FIG.

Hereinafter, the electromagnetic relay according to the embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

Embodiment 1.
FIG. 1 is a first perspective view showing the appearance of the electromagnetic relay 100 according to the first embodiment of the present invention. FIG. 2 is a second perspective view showing the appearance of the electromagnetic relay 100 shown in FIG. The second perspective view shows a state in which the appearance of the electromagnetic relay 100 is viewed from a direction different from that in the case of the first perspective view. FIG. 3 is an exploded perspective view of the electromagnetic relay 100 shown in FIG. Here, the appearance configuration of the electromagnetic relay 100 will be described with reference to FIGS. 1 to 3.

The housing 100a constituting the outer shell of the electromagnetic relay 100 is composed of a case 11, a terminal fitting holding wall 12 inserted into the case 11, and a plate-shaped cover 6. The terminal fitting holding wall 12 holds the first fixed contact side terminal fitting 1A, the second fixed contact side terminal fitting 2A, the first movable contact side terminal fitting 1B, and the second movable contact side terminal fitting 2B. ..

The first fixed contact side terminal fitting 1A, the second fixed contact side terminal fitting 2A, the first movable contact side terminal fitting 1B, and the second movable contact side terminal fitting 2B are the electromagnetic relay 100 and the external electric circuit. It is an external terminal for connection. The first fixed contact side terminal fitting 1A and the first movable contact side terminal fitting 1B form a first circuit which is one circuit in which opening and closing is performed. The second fixed contact side terminal fitting 2A and the second movable contact side terminal fitting 2B form a second circuit which is another circuit in which opening and closing is performed.

The first fixed contact side terminal fitting 1A has an end portion 1Aa exposed to the outside of the housing 100a. The second fixed contact side terminal fitting 2A has an end portion 2Aa exposed to the outside of the housing 100a. The first movable contact side terminal fitting 1B has an end portion 1Ba exposed to the outside of the housing 100a. The second movable contact side terminal fitting 2B has an end portion 2Ba exposed to the outside of the housing 100a. The first fixed contact side terminal fitting 1A, the second fixed contact side terminal fitting 2A, the first movable contact side terminal fitting 1B, and the second movable contact side terminal fitting 2B are made of a copper alloy having a low electric resistance. It is a conductive metal plate made of a metal material.

As shown in FIG. 3, the cover 6 is fixed to the case 11 by tightening the cover screw 7. Note that FIG. 3 shows the electromagnetic relay 100 with the cover 6 removed. As the material of the case 11, the terminal fitting holding wall 12, and the cover 6, a synthetic resin material having heat resistance and insulating properties such as nylon 6 and 6 is used. Further, the electromagnetic relay 100 has a control signal cable 5 for energizing the actuator 50 provided in the housing 100a.

The external dimensions of the housing 100a are a vertical length of 55 mm, a horizontal length of 57 mm, and a thickness of 27 mm. The vertical length is the length between the end of the housing 100a on the side of the terminal fitting holding wall 12 and the end of the housing 100a on the side opposite to the side of the terminal fitting holding wall 12. The horizontal length is the length in the direction in which the first fixed contact side terminal fitting 1A and the second fixed contact side terminal fitting 2A are arranged side by side. The thickness shall be the thickness in the direction perpendicular to the vertical length direction and the horizontal length direction. The electromagnetic relay 100 is configured to be able to open and close a circuit in which an AC voltage of 100 V to 200 V is applied and a current of about 60 A flows. When the current flowing through the circuit of the electromagnetic relay 100 is smaller than 60 A, the external dimension can be made smaller than the above-mentioned external dimension.

FIG. 4 is a perspective view showing a state in which the first fixed contact side terminal fitting 1A and the second fixed contact side terminal fitting 2A are removed from the housing 100a of the electromagnetic relay 100 shown in FIG. In FIG. 4, the cover 6 constituting the housing 100a is not shown.

The first fixed contact side terminal fitting 1A is attached to the first terminal fitting mounting portion 15b. The first terminal fitting mounting portion 15b is provided on the terminal fitting holding wall 12. The second fixed contact side terminal fitting 2A is attached to the second terminal fitting mounting portion 15a. The second terminal fitting mounting portion 15a is composed of a terminal fitting holding wall 12 and a case front wall portion 11a of the case 11. Details of the first terminal fitting mounting portion 15b and the second terminal fitting mounting portion 15a will be described later.

FIG. 5 is a first perspective view of the first fixed contact side terminal fitting 1A shown in FIG. FIG. 6 is a second perspective view of the first fixed contact side terminal fitting 1A shown in FIG. The second perspective view shows a state in which the first fixed contact side terminal fitting 1A is viewed from a direction different from that in the case of the first perspective view.

The first fixed contact side terminal fitting 1A has a first fixed contact 1Ac provided at an end opposite to the end 1Aa. The first fixed contact 1Ac is fixed to the first fixed contact side terminal fitting 1A and integrated with the first fixed contact side terminal fitting 1A. The first fixed contact 1Ac is a conductive metal plate made of a metal material such as a copper alloy having a low electric resistance. The first fixed contact 1Ac is provided with a first fixed contact 1Ad. As the material of the first fixed contact 1Ad, a silver alloy or the like, which is a material having low electric resistance and low contact resistance, is used.

The second fixed contact side terminal fitting 2A shown in FIG. 4 has a second fixed contact 2Ac provided at an end portion opposite to the end portion 2Aa. The second fixed contact 2Ac is provided with a second fixed contact 2Ad. The second fixed contact 2Ac is formed in the same manner as the first fixed contact 1Ac. The second fixed contact 2Ad is formed in the same manner as the first fixed contact 1Ad. The second fixed contact side terminal fitting 2A has the same configuration as the first fixed contact side terminal fitting 1A.

FIG. 7 is a first perspective view of the first movable contact side terminal fitting 1B shown in FIG. FIG. 8 is a second perspective view of the first movable contact side terminal fitting 1B shown in FIG. The second perspective view shows a state in which the first movable contact side terminal fitting 1B is viewed from a direction different from that in the case of the first perspective view.

The first movable contact side terminal fitting 1B has a first movable contact 1Bc provided at an end portion opposite to the end portion 1Ba. The first movable contact 1Bc is fixed to the first movable contact side terminal fitting 1B and integrated with the first movable contact side terminal fitting 1B. The first movable contact 1Bc is a conductive metal plate having low electrical resistance and elasticity, such as a beryllium copper plate. The first movable contact 1Bc is provided with a first movable contact 1Bd. As the material of the first movable contact 1Bd, a silver alloy or the like, which is a material having low electric resistance and low contact resistance, is used.

The second movable contact side terminal fitting 2B shown in FIG. 4 has a second movable contact 2Bc provided at an end portion opposite to the end portion 2Ba. The second movable contact 2Bc is provided with a second movable contact 2Bd. The second movable contact 2Bc is formed in the same manner as the first movable contact 1Bc. The second movable contact 2Bd is formed in the same manner as the first movable contact 1Bd. The second movable contact side terminal fitting 2B has the same configuration as the first movable contact side terminal fitting 1B.

By attaching the first fixed contact side terminal fitting 1A to the first terminal fitting mounting portion 15b shown in FIG. 4, the first fixed contact side terminal fitting 1A attaches the first fixed contact 1Ad to the first movable contact 1Bd. They are placed facing each other. By attaching the second fixed contact side terminal fitting 2A to the second terminal fitting mounting portion 15a shown in FIG. 4, the second fixed contact side terminal fitting 2A attaches the second fixed contact 2Ad to the second movable contact 2Bd. They are placed facing each other. As described above, the electromagnetic relay 100 has a first fixed contact 1Ac and a first movable contact 1Bc facing each other, and a second fixed contact 2Ac and a second movable contact 2Bc facing each other.

The first fixed contact 1Ad and the first movable contact 1Bd constitute a contact responsible for opening and closing the first circuit. The first circuit is closed by contact between the first fixed contact 1Ad and the first movable contact 1Bd and opened by the release of such contact. The second fixed contact 2Ad and the second movable contact 2Bd form a contact responsible for opening and closing the second circuit. The second circuit is closed by contact between the second fixed contact 2Ad and the second movable contact 2Bd and opened by the release of such contact.

Next, with reference to FIGS. 9 and 10, a configuration for attaching the actuator 50 to the housing 100a will be described. FIG. 9 is a perspective view showing a state in which the actuator 50 and the terminal fitting holding wall 12 are removed from the case 11 of the housing 100a shown in FIG. FIG. 10 is a perspective view showing the actuator 50 shown in FIG. FIG. 10 shows a state in which the actuator 50 is viewed from a direction different from that in the case of FIG.

The first fitting recess 11f, the second fitting recess 11g, and the first fitting groove 11c are formed inside the case 11. The actuator 50 has a first positioning convex portion 51c formed so as to be fitted in the first fitting concave portion 11f, a second positioning convex portion 54c formed so as to be fitable in the second fitting concave portion 11g, and a first. It has a positioning rib 58a formed so as to be fitted into the fitting groove 11c. The positioning rib 58a is formed on the crossbar 58. The details of the crossbar 58 will be described later. The actuator 50 fits the first positioning protrusion 51c into the first fitting recess 11f, fits the second positioning protrusion 54c into the second fitting recess 11g, and fits into the first fitting groove 11c. By fitting the positioning rib 58a, the case 11 is positioned and attached to the case 11.

After the actuator 50 is attached to the case 11, the terminal fitting holding wall 12 is attached to the case 11. The terminal fitting holding wall 12 is attached to the case 11 by being inserted into the case front wall portion 11a. The terminal fitting holding wall 12 is fixed to the case 11 by tightening the case fixing screw 13. Further, the case 11 is formed with a cable wiring groove 11b through which the control signal cable 5 is passed. The control signal cable 5 is drawn out of the housing 100a through the cable wiring groove 11b.

FIG. 11 is a perspective view showing the terminal fitting holding wall 12 shown in FIG. FIG. 11 shows a state in which the terminal fitting holding wall 12 is viewed from a direction different from that in the case of FIG. The terminal fitting holding wall 12 is a rod fitting recess 12c formed so that a fourth fitting groove 12a, a fifth fitting groove 12b, and a rod end portion 59c, which is an end portion of the rod 59 described later, can be fitted. And have. By inserting the terminal fitting holding wall 12 into the case front wall portion 11a, the above-mentioned second terminal fitting mounting portion 15a including the fourth fitting groove 12a and the case front wall portion 11a is configured. The first terminal fitting mounting portion 15b is composed of a single fifth fitting groove 12b.

Next, the configuration of the actuator 50 will be described with reference to FIGS. 12 and 13. FIG. 12 is an exploded perspective view of the actuator 50 shown in FIG. FIG. 13 is a perspective view showing a part of the actuator 50 shown in FIG. 9 and the terminal fitting holding wall 12. FIG. 13 shows a state in which the actuator 50 and the terminal fitting holding wall 12 with the crossbar 58 removed are viewed from a direction different from that in the case of FIG.

The actuator 50 includes a mover 57 which is a cylindrical body, an excitation coil 55 that operates the mover 57 by excitation by energization, a bobbin 54 around which the excitation coil 55 is wound, and a first yoke 51 to which the bobbin 54 is fixed. It has a permanent magnet 53 in contact with the first yoke 51 and a second yoke 52 in contact with the permanent magnet 53 and provided between the permanent magnet 53 and the bobbin 54. The first positioning convex portion 51c is provided on the first yoke 51. Further, the second positioning convex portion 54c shown in FIG. 10 is provided on the bobbin 54.

The exciting coil 55 includes a first exciting coil 55a that generates an electromagnetic force for closing an open electric circuit by energization, and a second exciting coil 55b that generates an electromagnetic force for opening a closed electric circuit by energization. Has. The second yoke 52 is arranged at a position between the first exciting coil 55a and the second exciting coil 55b in the central axis direction of the exciting coil 55. The winding of the first exciting coil 55a and the winding of the second exciting coil 55b are bundled with each other by one control signal cable 5. The winding direction of the first exciting coil 55a and the winding direction of the second exciting coil 55b are the same. The control current is applied to the first exciting coil 55a from the winding start side and to the second exciting coil 55b from the winding end side. As a result, the first exciting coil 55a and the second exciting coil 55b exert a force opposite to each other on the mover 57. A half-wave current is used as the control current.

An insertion hole 54d into which the mover 57 is inserted is formed at the position of the central axis of the excitation coil 55 in the bobbin 54. A screw hole 57a is provided on one end surface of the mover 57. The bobbin 54 has a first claw 54a formed so as to be entangleable with the outer edge of the first yoke 51, and a second claw 54b formed so as to be entangleable with the entanglement hole 51a penetrating the first yoke 51. The bobbin 54 has the permanent magnet 53 and the second yoke 52 sandwiched between the first yoke 51 and the first yoke 51, and the first claw 54a is hung on the outer edge of the first yoke 51, and the second claw is inserted into the entangled hole 51a. By multiplying 54b, it is fixed to the first yoke 51.

As the material of the bobbin 54, a synthetic resin material having heat resistance and insulating properties such as PolyButylene Terephthalate (PBT) is used. Iron, which is a magnetic material, is used as the material for the first yoke 51, the second yoke 52, and the mover 57. The exciting coil 55 is not limited to the one composed of two coils of the first exciting coil 55a and the second exciting coil 55b, and may be composed of a single coil.

The actuator 50 includes a crossbar 58, a rod 59 that transmits the operation of the mover 57 to the crossbar 58, and a pressure spring 60 that applies contact pressure to the first movable contact 1Bd and the second movable contact 2Bd. The rod 59 is integrated with the mover 57 by tightening the rod screw portion 59a provided at the end portion of the rod 59 opposite to the rod end portion 59c into the screw hole 57a. The first yoke 51 is provided with a through hole 51b through which the rod 59 is passed. The rod screw portion 59a is tightened into the screw hole 57a in a state where the rod 59 is passed through the through hole 51b.

A spring fixing portion 59d is provided at an intermediate portion between the rod screw portion 59a and the rod end portion 59c of the rod 59. The pressure contact spring 60 is arranged between the crossbar 58 and the spring stop portion 59d by passing the pressure contact spring 60 through the portion of the rod 59 on the side of the rod end portion 59c with respect to the spring stop portion 59d. Will be done. One end of the pressure contact spring 60 is applied to the spring stop portion 59d. The other end of the pressure spring 60 is applied to the crossbar 58.

An E-ring fixing groove 59b formed so that the E-ring 61 can be fitted is provided at a position of the rod 59 between the rod end portion 59c and the spring stopper portion 59d. In the E-ring 61, the rod 59 is prevented from falling off from the crossbar 58 by fitting the E-ring 61 into the E-ring fixing groove 59b in a state where the rod 59 penetrates the crossbar 58. The E-ring 61 is also referred to as an E-shaped retaining ring.

The connection between the rod 59 and the mover 57 is not limited to the tightening of the rod screw portion 59a into the screw hole 57a. Further, the connection between the crossbar 58 and the rod 59 is not limited to the one using the E ring 61. A resin joint may be used for the connection between the rod 59 and the mover 57 and the connection between the crossbar 58 and the rod 59.

FIG. 14 is a first perspective view showing the crossbar 58 included in the actuator 50 shown in FIG. FIG. 15 is a second perspective view showing the crossbar 58 included in the actuator 50 shown in FIG. The second perspective view shows a state in which the crossbar 58 is viewed from a direction different from that in the case of the first perspective view.

The crossbar 58 has the above-mentioned positioning rib 58a, a spring disposing portion 58b which is a concave portion in which the pressure contact spring 60 is disposed, two pressing convex portions 58c, and four hook portions 58d. .. As the material of the crossbar 58, a synthetic resin material having heat resistance and insulating properties such as phenol resin is used.

The pressing convex portion 58c is provided with an inclined surface that is inclined with respect to the surface of the crossbar 58 on which the pressing convex portion 58c is formed. One of the pressing convex portions 58c is provided so that the apex of the inclined surface faces the vicinity of the center of the first movable contactor 1Bc. The pressing convex portion 58c presses the vicinity of the center of the first movable contact 1Bc. The other pressing convex portion 58c is provided so that the apex of the inclined surface faces the vicinity of the center of the second movable contact 2Bc. The pressing convex portion 58c presses the vicinity of the center of the second movable contact 2Bc.

Two of the four hook portions 58d are provided so as to face each other so as to be able to be crossed with the first movable contact 1Bc. The first movable contact 1Bc is pulled up by the operation of the crossbar 58 in a state where the two hook portions 58d are crossed with the first movable contact 1Bc. The other two of the four hooks 58d are provided so as to face each other so as to be able to be crossed with the second movable contact 2Bc. The second movable contact 2Bc is pulled up by the operation of the crossbar 58 in a state where the two hook portions 58d are crossed with the second movable contact 2Bc. Each hook portion 58d has a hook shape for the pulling operation.

Next, with reference to FIGS. 9 and 16, a configuration for attaching the first movable contact side terminal fitting 1B and the second movable contact side terminal fitting 2B to the case 11 will be described. FIG. 16 is a perspective view showing a state in which the first movable contact side terminal fitting 1B and the second movable contact side terminal fitting 2B are removed from the case 11 shown in FIG. 9.

The case 11 has a second fitting groove 11d formed so that the first movable contact side terminal fitting 1B can be fitted, and a third fitting groove 11e formed so that the second movable contact side terminal fitting 2B can be fitted. And have. The first movable contact side terminal fitting 1B is positioned in the case 11 and attached to the case 11 by being fitted into the second fitting groove 11d. The second movable contact side terminal fitting 2B is positioned in the case 11 and attached to the case 11 by being fitted into the third fitting groove 11e.

Next, the arrangement of the crossbar 58, the first movable contact 1Bc, and the second movable contact 2Bc in the case 11 will be described with reference to FIGS. 17 and 18. FIG. 17 is a plan view showing a state in which the electromagnetic relay 100 shown in FIG. 1 is viewed from the side of the cover 6. FIG. 18 is a cross-sectional view of the electromagnetic relay 100 in the XVIII-XVIII line shown in FIG.

The crossbar 58 is positioned in the case 11 and attached to the case 11 by fitting the positioning rib 58a into the first fitting groove 11c. By fitting the positioning rib 58a into the first fitting groove 11c, the rotation of the crossbar 58 in the θ direction and the θ'direction shown in FIG. 18 is prevented.

Further, as shown in FIG. 18, the first movable contact 1Bc is arranged so as to be crossed with two of the four hook portions 58d. The second movable contact 2Bc is arranged so as to be crossed with the other two of the four hook portions 58d.

Next, a state in which the rod 59 is fitted to the terminal fitting holding wall 12 will be described with reference to FIGS. 17 and 19. FIG. 19 is a cross-sectional view of the electromagnetic relay 100 in the XIX-XIX line shown in FIG. FIG. 19 shows a cross-sectional configuration of a part of the electromagnetic relay 100 including the first fixed contact side terminal fitting 1A and the first movable contact side terminal fitting 1B. FIG. 19 shows a state in which the rod end portion 59c is fitted into the rod fitting recess 12c of the terminal fitting holding wall 12.

Next, the operation of the electromagnetic relay 100 according to the first embodiment will be described with reference to FIGS. 20 and 21. FIG. 20 is a first diagram illustrating the operation of the electromagnetic relay 100 shown in FIG. 1. FIG. 21 is a second diagram illustrating the operation of the electromagnetic relay 100 shown in FIG.

When an exciting current, which is a control signal, is passed through the first exciting coil 55a through the control signal cable 5, an electromagnet is formed by a circuit composed of a first yoke 51, a second yoke 52, and a mover 57. By energizing the first exciting coil 55a, the mover 57 moves in the A direction shown in FIG. 20 according to the direction of the exciting current. When an exciting current, which is a control signal, is passed through the second exciting coil 55b through the control signal cable 5, an electromagnet is formed by a circuit composed of a first yoke 51, a second yoke 52, and a mover 57. By energizing the second exciting coil 55b, the mover 57 moves in the B direction shown in FIG. 20 according to the direction of the exciting current. The mover 57 is held at the position after movement even after the excited state of the exciting coil 55 is canceled by the permanent magnet 53. That is, the first yoke 51, the second yoke 52, and the mover 57 form a release-type electromagnet.

Here, a closing operation in which the first fixed contact 1Ad and the first movable contact 1Bd are brought into contact with each other and the second fixed contact 2Ad and the second movable contact 2Bd are brought into contact with each other will be described. To bring the first movable contact 1Bd away from the first fixed contact 1Ad into contact with the first fixed contact 1Ad and the second movable contact 2Bd away from the second fixed contact 2Ad to the second fixed contact 2Ad. , Excitation current is passed through the first excitation coil 55a. By energizing the first excitation coil 55a, the mover 57 moves in the A direction.

As the mover 57 moves in the A direction, the crossbar 58 moves in the A direction via the rod 59. As the crossbar 58 moves in the A direction, the first movable contact 1Bc is pressed by the pressing convex portion 58c which is a force point. Since the first fulcrum 16 is a fulcrum during the closing operation, the portion of the first movable contactor 1Bc on the side of the force point from the first fulcrum 16 is the first fixed contactor side due to the pressing by the pressing convex portion 58c. It bends toward the side of the terminal fitting 1A. As the first movable contact 1Bc bends, the first movable contact 1Bd comes into contact with the first fixed contact 1Ad. The first circuit is closed by electrically conducting the first fixed contact 1Ac and the first movable contact 1Bc.

As the crossbar 58 moves in the A direction, the second movable contact 2Bc is pressed by the pressing convex portion 58c which is a force point, similarly to the first movable contact 1Bc. The second movable contact 2Bc bends toward the side of the second fixed contact side terminal fitting 2A, similarly to the first movable contact 1Bc. As the second movable contact 2Bc bends, the second movable contact 2Bd comes into contact with the second fixed contact 2Ad. The second circuit is closed by electrically conducting the second fixed contact 2Ac and the second movable contact 2Bc. In this way, the electromagnetic relay 100 simultaneously performs the closing operation of the first circuit and the closing operation of the second circuit.

Next, an opening operation for releasing the contact between the first fixed contact 1Ad and the first movable contact 1Bd and releasing the contact between the second fixed contact 2Ad and the second movable contact 2Bd will be described. To separate the first movable contact 1Bd in contact with the first fixed contact 1Ad from the first fixed contact 1Ad and the second movable contact 2Bd in contact with the second fixed contact 2Ad from the second fixed contact 2Ad. , Excitation current is passed through the second excitation coil 55b. By energizing the second excitation coil 55b, the mover 57 moves in the B direction.

As the mover 57 moves in the B direction, the crossbar 58 moves in the B direction via the rod 59. By moving the crossbar 58 in the B direction, the pressing of the first movable contact 1Bc is released. When the pressing is released, the first movable contact 1Bc is in a state of no bending due to the restoring force of the first movable contact 1Bc. The crossbar 58 is further moved in the B direction after the first movable contact 1Bc is not bent, so that the first movable contact 1Bc is pressed by the hook portion 58d which is a force point. Since the second fulcrum 17 is a fulcrum during the opening operation, the portion of the first movable contactor 1Bc on the side including the force point from the second fulcrum 17 is the first fixed contact side terminal due to the pressing by the hook portion 58d. It bends toward the side opposite to the side of the metal fitting 1A. By bending the first movable contact 1Bc, the first movable contact 1Bd is separated from the first fixed contact 1Ad. The first circuit is opened by eliminating the electrical conduction between the first fixed contact 1Ac and the first movable contact 1Bc.

As the crossbar 58 moves in the B direction, the second movable contact 2Bc is pressed by the hook portion 58d, which is a force point, similarly to the first movable contact 1Bc. Like the first movable contact 1Bc, the second movable contact 2Bc bends toward the side opposite to the side of the second fixed contact side terminal fitting 2A. By bending the second movable contact 2Bc, the second movable contact 2Bd is separated from the second fixed contact 2Ad. The second circuit is opened by eliminating the electrical conduction between the second fixed contact 2Ac and the second movable contact 2Bc. In this way, the electromagnetic relay 100 simultaneously performs the opening / closing operation of the first circuit and the opening / closing operation of the second circuit. The electromagnetic relay 100 can open and close two circuits by using an actuator 50 having a simple structure having one mover 57 and one crossbar 58.

Next, the positional relationship between the bobbin 54 and the second yoke 52, which is a characteristic configuration of the electromagnetic relay 100 according to the first embodiment, will be described. FIG. 22 is a cross-sectional view of the actuator 50 on the line XXII-XXII shown in FIG. FIG. 23 is a cross-sectional view of the actuator 50 on the line XXIII-XXIII shown in FIG.

The cross section shown in FIG. 22 and the cross section shown in FIG. 23 indicate the cylinder 54h of the bobbin 54. The excitation coil 55 is wound around a cylinder 54h. The insertion hole 54d, which is an internal space into which the mover 57 is inserted in the bobbin 54, is also formed in the cylinder 54h.

The bobbin 54 is provided with a cutout portion 54g having a shape cut out until a part of the cylinder 54h reaches the insertion hole 54d. The cutout portion 54g is formed so that a part of the cylinder 54h on the side of the second yoke 52 is removed. As shown in FIG. 23, the second yoke 52 is arranged in the notch portion 54g. As a result, the second yoke 52 is arranged so that a part of the second yoke 52 on the side opposite to the side in contact with the permanent magnet 53 is inserted into the insertion hole 54d side from the outer surface 54i of the cylinder 54h. By arranging the second yoke 52 so as to enter the insertion hole 54d from the outer surface 54i, the distance between the mover 57 and the second yoke 52 is such that the second yoke 52 is brought into contact with the outer surface 54i. It is shorter than when the yoke 52 is arranged.

The height of the magnetic characteristic of the actuator 50 is proportional to the amount of magnetic flux reaching the mover 57 from the permanent magnet 53 via the second yoke 52. Further, the amount of magnetic flux reaching the mover 57 is inversely proportional to the distance between the mover 57 and the second yoke 52. Since the distance between the mover 57 and the second yoke 52 is shortened by inserting the second yoke 52 closer to the insertion hole 54d than the outer surface 54i, the electromagnetic relay 100 can enhance the magnetic characteristics of the actuator 50. .. The electromagnetic relay 100 can improve the holding force for magnetically holding the state of contacts by improving the magnetic characteristics by the actuator 50.

By using the bobbin 54 having the notch portion 54g, the electromagnetic relay 100 can easily improve the magnetic characteristics of the actuator 50 without increasing the size of the actuator 50. The electromagnetic relay 100 easily improves the magnetic characteristics of the actuator 50 having a small structure, as compared with the case of improving the magnetic characteristics by increasing the amount of magnetic flux by exchanging the permanent magnet 53 or expanding the cross-sectional area of the mover 57. be able to.

In order to ensure the durability of the bobbin 54 or to stably form the bobbin 54, the wall thickness of the bobbin 54 needs to be a certain wall thickness or more. Therefore, even if the bobbin 54 is simply made thinner without providing the notch portion 54 g, the distance between the mover 57 and the second yoke 52 cannot be shortened more than the constant wall thickness. It is difficult to shorten the distance from the second yoke 52. According to the first embodiment, the electromagnetic relay 100 can easily shorten the distance between the mover 57 and the second yoke 52 by providing the bobbin 54 with a notch portion 54 g.

Two inner wall convex portions 54e and 54f, which are convex portions that can come into contact with the mover 57, are provided at positions on the side of the second yoke 52 of the inner wall of the cylinder 54h constituting the insertion hole 54d. In FIG. 22, the inner wall convex portion 54e and the inner wall convex portion 54f are arranged at positions perpendicular to the surface of the second yoke 52 on the side of the bobbin 54 and symmetrical with respect to the line passing through the center of the cylinder 54h. When the mover 57 is in contact with the inner wall convex portions 54e and 54f, a gap is formed between the mover 57 and the second yoke 52. By providing the inner wall convex portions 54e and 54f, the mover 57 is prevented from moving toward the second yoke 52 as compared with the case where the mover 57 is in contact with the inner wall convex portions 54e and 54f. The electromagnetic relay 100 can arbitrarily set the distance between the mover 57 and the second yoke 52 by providing the inner wall convex portions 54e and 54f.

The electromagnetic relay 100 can eliminate friction due to contact between the second yoke 52 and the mover 57 by providing a gap between the mover 57 and the second yoke 52. The electromagnetic relay 100 can prevent the second yoke 52 or the mover 57 from being scraped by sliding between the second yoke 52 and the mover 57. In the electromagnetic relay 100, it is possible to reduce an increase in friction due to foreign matter generated by scraping the second yoke 52 or the mover 57, and further reduce malfunction due to an increase in friction.

By providing the two inner wall convex portions 54e and 54f, the position of the mover 57 when the mover 57 slides due to contact with the inner wall convex portions 54e and 54f is maintained at the center of the insertion hole 54d. .. As a result, the electromagnetic relay 100 can maintain stable sliding of the mover 57.

The inner wall convex portions 54e and 54f may be arranged at positions where the mover 57 and the second yoke 52 are in contact with each other while the movable element 57 is in contact with the inner wall convex portions 54e and 54f. In the electromagnetic relay 100, the distance between the mover 57 and the second yoke 52 can be set to zero in a state where the mover 57 and the second yoke 52 are in contact with each other. In the cross section shown in FIG. 22, when the mover 57 slides due to the contact with the inner wall convex portions 54e and 54f at two points and the contact with the second yoke 52 at one point, the mover 57 is the first. The blurring of the position of the mover 57 is reduced as compared with the case where the two yokes 52 are in contact with each other at only one point. In this case as well, the electromagnetic relay 100 can maintain stable sliding of the mover 57.

According to the first embodiment, in the electromagnetic relay 100, a part of the second yoke 52 is inserted into the insertion hole 54d side from the outer surface 54i by the notch portion 54g provided in the bobbin 54, and the second yoke 52 is formed. Have been placed. By shortening the distance between the mover 57 and the second yoke 52, the electromagnetic relay 100 easily improves the holding force for magnetically holding the contact state by using the actuator 50 having a small configuration. be able to. As a result, the electromagnetic relay 100 has an effect that the holding force for magnetically holding the state of the contact can be easily improved due to the small size.

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

1A 1st fixed contact side terminal fitting, 1Aa, 1Ba, 2Aa, 2Ba end, 1Ac 1st fixed contact, 1Ad 1st fixed contact, 1B 1st movable contact side terminal fitting, 1Bc 1st movable contact, 1Bd 1st movable contact, 2A 2nd fixed contact side terminal fitting, 2Ac 2nd fixed contact, 2Ad 2nd fixed contact, 2B 2nd movable contact side terminal fitting, 2Bc 2nd movable contact, 2Bd 2nd movable Contact, 5 Control signal cable, 6 cover, 7 cover screw, 11 case, 11a case front wall, 11b cable wiring groove, 11c first fitting groove, 11d second fitting groove, 11e third fitting groove, 11f 1st fitting recess, 11g 2nd fitting recess, 12 terminal fitting holding wall, 12a 4th fitting groove, 12b 5th fitting groove, 12c rod fitting recess, 13 case fixing screw, 15a 2nd terminal fitting mounting , 15b 1st terminal fitting mounting part, 16 1st fulcrum, 17 2nd fulcrum, 50 actuator, 51 1st yoke, 51a mating hole, 51c 1st positioning convex part, 52 2nd yoke, 53 permanent magnet, 54 Bobbin, 54a 1st claw, 54b 2nd claw, 54c 2nd positioning convex part, 54d insertion hole, 54e, 54f inner wall convex part, 54g notch, 54h cylinder, 54i outer surface, 55 exciting coil, 55a 1st exciting coil , 55b 2nd exciting coil, 57 mover, 57a screw hole, 58 crossbar, 58a positioning rib, 58b spring arrangement, 58c pressing protrusion, 58d hook, 59 rod, 59a rod thread, 59b E-ring Fixed groove, 59c rod end, 59d spring stop, 60 pressure spring, 61 E ring, 100 electromagnetic relay, 100a housing.

Claims (2)

The first fixed contact and the first movable contact that face each other,
The second fixed contact and the second movable contact that face each other,
By energizing a movable element that causes contact and release of contact between the first fixed contact and the first movable contact, and contact and release of contact between the second fixed contact and the second movable contact. A bobbin having an exciting coil for operating the mover by excitation, a cylinder having a cylinder around which the excitement coil is wound and an internal space into which the mover is inserted, and a first bobbin to which the bobbin is fixed are fixed. An actuator having a yoke, a permanent magnet in contact with the first yoke, and a second yoke in contact with the permanent magnet and provided between the permanent magnet and the bobbin.
Equipped with
The bobbin is provided with a notch portion having a shape notched until a part of the cylinder reaches the internal space.
The second yoke is arranged at the notch so that a part of the second yoke on the side opposite to the side in contact with the permanent magnet is inserted into the side of the internal space from the outer surface of the cylinder. An electromagnetic relay characterized by being. The electromagnetic wave according to claim 1, wherein a convex portion that can be contacted with the mover is provided at a position on the inner wall of the cylinder constituting the internal space on the side of the second yoke. relay.

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