WO2013155870A1

WO2013155870A1 - Electromagnetic relay and switch device

Info

Publication number: WO2013155870A1
Application number: PCT/CN2013/000431
Authority: WO
Inventors: 张晓宁; 胡协力
Original assignee: 泰科电子(深圳)有限公司
Priority date: 2012-04-16
Filing date: 2013-04-13
Publication date: 2013-10-24
Also published as: CN103377857B; CN103377857A

Abstract

Disclosed is an electromagnetic relay, comprising: a stationary current-carrying plate fixedly arranged, wherein the stationary current-carrying plate is provided with a first end and a second end, and the first end of the stationary current-carrying plate is provided with a stationary contact; and a movable contact spring at least one end of which is movably arranged, the movable contact spring being provided with a movable contact, wherein at least one end of the movable contact spring on which the movable contact is arranged can be moved to enable the movable contact and the stationary contact to be arranged in a contacting manner or a separated manner. It is characterized in that a concentrating flux plate is arranged between the stationary current-carrying plate and the movable contact spring, the concentrating flux plate is arranged on the stationary current-carrying plate, on the movable contact spring, or between the stationary current-carrying plate and the movable contact spring and in the position which is not in contact with the stationary current-carrying plate and the movable contact spring. When the movable contact is in contact with the stationary contact to switch on a current, the concentrating flux plate can reduce the ampere force between the stationary current-carrying plate and the movable contact spring. The present invention can reduce the influence of ampere force, and maintain the security of an electromagnetic relay and a switch device.

Description

Electromagnetic relay and switch device

The invention relates to an electromagnetic relay and a switching device. Background technique

A magnetically held electromagnetic relay is an electrical control device that has an interaction between a control system (also known as an input circuit) and a controlled system (also known as an output circuit). The magnetic holding electromagnetic relay is generally composed of a core, a coil, a yoke, an armature, a permanent magnet, a contact spring, and the like. The working principle is as follows: a certain voltage is applied to both ends of the coil, a certain current flows through the coil, thereby generating an electromagnetic effect, and the armature moves under the interaction force of the electromagnetic force and the permanent magnet, thereby driving the movable contact and the static Contact contact, turn on the circuit being controlled. When the coil is de-energized, the electromagnetic suction also disappears, and the armature is attracted to the yoke by the permanent magnet to remain in the contact-on state. When a reverse current flows through the coil, the armature moves in the opposite direction under the interaction force of the electromagnetic force and the permanent magnet, thereby driving the movable contact to be disconnected from the stationary contact and disconnecting the controlled circuit. When the coil is interrupted, the armature is held in a state in which the movable contact is separated from the stationary contact by the permanent magnet. Relays typically have two circuits, a low voltage control circuit and a high voltage operating circuit. The low voltage or small current through which the electromagnetic coil passes is high voltage or large current that is passed through the control circuit.

A typical use of magnetically held electromagnetic relays is in smart meters. The magnetic holding electromagnetic relay for smart meters is required to withstand 30 times of rated current for a short time. One of the structures is that a forward current is passed through the electromagnetic coil, and the movable contact on the moving spring is brought into contact with the static contact on the static current-carrying plate to turn on the controlled circuit. The electromagnetic coil is connected to the control circuit by passing a reverse current to separate the movable contact on the moving spring from the stationary contact on the static current-carrying plate. When the static current-carrying plate and the moving reed pass current, the static current-carrying plate and the moving reed will generate an electromagnetic field. The electromagnetic fields generated by the static carrier plate and the moving reed each will act on each other. Force, that is, Ampere. Ampere is caused by Lorentz force. According to the right-hand rule, the direction of the electromagnetic field generated by the respective currents in the static current-carrying plate and the moving reed can be judged. According to the left-hand rule, the direction of the ampere force that the static carrier plate and the moving reed are subjected to can be judged. If the static current-carrying plate and the moving reed have the same current direction, the ampere force of the two can make the moving contact and the static contact more closely contact. If the static current-carrying plate and the moving reed have opposite current directions, the ampere forces they receive have a tendency to separate the moving contact from the stationary contact.

In order to prevent the ampere force from impeding the control of the circuit, either the static current-carrying plate and the moving reed current direction are the same; or the static current-carrying plate and the moving reed current are opposite in direction, but only applied to the controlled circuit. The field of current is smaller. Some smart meters have a rated current of 80A and a short-time current of 30 times the rated current. If the rated current is large, then at 30 times the rated current, the static current-carrying plates and moving reeds with opposite current directions are subjected to an ampere force greater than the pressure between the moving reed and the static current-carrying plate, which is sufficient for moving contacts and static contact. The point separation causes the relay contacts to be damaged and the relay function to be lost. Therefore, the structure in which the static current-carrying plate and the moving reed current are opposite in direction is limited in its application field. However, an electromagnetic relay having a structure in which the static current-carrying plate and the moving reed current are opposite in direction has been applied to fields such as smart meters, and other components have a design compatible therewith. In the case of increasing the rated current, such as redesigning the electromagnetic relay, it is difficult to retrofit, costly, and troublesome to implement. SUMMARY OF THE INVENTION One of the objects of the present invention is to provide an electromagnetic relay that can reduce the influence of Ampere force in order to overcome the deficiencies in the prior art. To achieve the above object, the present invention is achieved by the following technical solutions: The electromagnetic relay includes: a fixedly disposed static carrier plate, the static carrier plate has a first end and a second end, and the first end of the static carrier plate is provided with Static contact; movable spring at least one end movable, said moving spring a movable contact is disposed on the sheet; the movable spring is at least provided with one end of the movable contact movable to contact the movable contact and can be separately disposed; wherein the static current is A magnetic conductive plate is disposed between the plate and the moving spring plate, and the magnetic conductive plate is disposed on the static current carrying plate, on the moving spring plate or between the static current carrying plate and the moving spring plate and does not move with the static current carrying plate a position at which the reed contacts; when the movable contact is in contact with the static contact to turn on a current, the magnetic conductive plate can reduce an ampoule between the static current-carrying plate and the movable reed. Preferably, the moving spring has a first end and a second end, and the movable contact is disposed at the first end; the distance between the first end and the static current carrying plate is smaller than the second end The distance from the static carrier plate. Preferably, the direction in which the static current-carrying plate extends from the provision of the static contact is the same as the direction in which the movable spring automatic contact extends, when the movable contact contacts the static contact to turn on the current. The static current-carrying plate and the moving reed have a current opposite to each other. 5倍。 The width of the static current-carrying plate is one-half to 1.5 times the width of the static current-carrying plate. Preferably, the width of the magnetic conductive plate is the same as the width of the static current carrying plate. 5倍。 The width of the static current-carrying plate is less than 1.5 times the width of the static current-carrying plate. Preferably, the moving spring has a first segment opposite to the static current-carrying plate and a second segment opposite to the static current-carrying plate; the first segment and the second segment are connected by the third segment; The distance between the first segment and the static current-carrying plate is smaller than the distance between the second segment and the static current-carrying plate; the movable contact is disposed on the first segment; the magnetic conductive plate is disposed on the static contact Between the second end and the second end; the length of the magnetic conductive plate extending from the static contact is greater than or equal to the distance between the movable contact and the third segment. Preferably, the length of the magnetic conductive plate is less than or equal to the distance between the movable contact and the second segment. Preferably, the electromagnetic relay further comprises a fixedly arranged take-off plate, the second section of the movable spring is fixedly connected to the lead-out plate; the movable spring is arranged to be close to the static load current of the first section of the movable contact The plate may be disposed away from the static current-carrying plate; the lead-out plate and the static carrier plate form two lead-out terminals. Preferably, the length of the magnetic conductive plate does not change in the width direction of the static current-carrying plate. Preferably, the electromagnetic relay further includes a housing, the housing is provided with a cavity; the static current-carrying plate is disposed on the housing, the first end is located in the cavity, and the second end is located in the cavity The movable spring is disposed in the cavity, and the lead-out plate is disposed on the housing, and the two ends of the lead-out plate are respectively located in the cavity and outside the cavity; one end of the movable spring that is not provided with the movable contact is connected with the lead-out plate; An electromagnetic component is disposed in the cavity; the electromagnetic component drives the moving reed to move to contact and separate the movable contact from the stationary contact. Preferably, the magnetic conductive plate is a soft magnetic material plate. More preferably, the magnetic conductive plate is an iron plate. Another object of the present invention is to provide a switching device that can reduce the influence of Ampere force in order to overcome the deficiencies in the prior art. In order to achieve the above object, the present invention is achieved by the following technical solutions: a switch device, comprising: a housing, the housing is provided with a cavity; a fixed static carrier plate, the static carrier plate has a One end and the second end, the first end of the static current-carrying plate is provided with a static contact; the first end of the static contact is disposed in the cavity, and the second end not provided with the static contact is located outside the cavity; a movable reed, the movable end of the movable spring is disposed in the cavity; the movable end of the movable spring is provided with a movable contact; and the movable end of the movable spring moves to move the movable a contact is in contact with the static contact and can be separated; a magnetic conductive plate, the magnetic conductive plate is located between the static current carrying plate and the moving spring plate, a magnetic permeability plate is disposed on the static current-carrying plate, on the movable spring, or between the static current-carrying plate and the movable spring, and is not in contact with the static current-carrying plate and the movable spring a driving component, wherein the driving component is drivingly connected to the moving reed, and the driving component drives the movable end of the movable spring to move to contact and separate the movable contact from the stationary contact. Preferably, the drive member is an electromagnetic drive member. Preferably, the electromagnetic driving component comprises a coil, a core, a yoke and an armature; the coil is disposed around the iron core, the yoke is connected to the iron core, and the armature has magnetic properties; When the coil is energized, the iron core and the yoke generate magnetism; the armature is moved by the magnetic drive of the yoke after the magnetic yoke generates magnetism; the moving armature drives the movable reed Set one end of the moving contact to move. Preferably, the yoke includes an L-shaped first yoke and an L-shaped second yoke; a first end of the L-shaped first yoke is connected to a first end of the iron core, the L-shaped a first end of the second yoke is coupled to the second end of the core; the armature includes a first armature, the first armature is rotatably disposed; and when the coil is energized, the first armature is Both ends are attracted and repelled by the second end of the L-shaped first yoke and the second end of the L-shaped second yoke, respectively. Preferably, the armature further includes a second armature, the first armature is disposed in linkage with the second armature and has a gap therebetween; the second end of the L-shaped first yoke is located at the first armature and the a gap between the second armatures; a second end of the L-shaped second yoke being located in a gap between the first armature and the second armature; when the coil is energized, the L The second end of the first yoke has the same force direction of the first armature and the second armature on both sides thereof, and the second end of the L-shaped second yoke is on the two sides thereof The first armature and the second armature have the same force direction, and the L-shaped first The second end of the yoke and the second end of the L-shaped second yoke are opposite in direction of the first armature force on the same side thereof, the second end of the L-shaped first yoke and the second end The second end of the L-shaped second yoke is opposite in direction to the second armature force on the same side thereof. Preferably, the first armature and the second armature are magnetically opposite. Preferably, the first armature and the second armature are disposed on a fixing frame; the fixing frame is provided with a pivot, and the pivot is located between the first armature and the second armature, And located between the second end of the L-shaped first yoke and the second end of the L-shaped second yoke; the pivot is rotatably disposed in the cavity; The movable reed is provided with one end of the movable contact for driving connection. Preferably, the method further includes a push plate, wherein the cavity is provided with a sliding slot; the push plate is movable in the sliding slot to make the push plate only close and away from the movable contact The static contact moves in the direction. Preferably, the armature holder is provided with a push rod; one end of the push plate is connected to one end of the movable spring, and the other end is connected to the push rod; the push rod can be driven by the push plate The moving spring is moved at least at one end. Preferably, the fixing frame is provided with a permanent magnet; the first armature and the second armature are both iron plates; and the first armature and the second armature respectively are opposite to the permanent magnet End contact. Preferably, the moving spring has a first end and a second end, the movable contact is disposed at a first end of the moving spring; the first end of the moving spring and the static current The distance of the plate is less than the distance between the second end of the moving spring and the static carrier plate. Preferably, the static current-carrying plate extends from the direction in which the static contact is disposed and the movable reed The direction extending from the movable contact is the same, and when the movable contact is in contact with the static contact to turn on a current, the static current-carrying plate and the moving reed have a current opposite to each other. 5倍。 The width of the static current-carrying plate is one-half to 1.5 times the width of the static current-carrying plate. Preferably, the width of the magnetic conductive plate is the same as the width of the static current carrying plate. 5倍。 The width of the static current-carrying plate is less than 1.5 times the width of the static current-carrying plate. Preferably, the moving spring has a first segment opposite to the static current carrying plate and a second segment opposite to the static current carrying plate; the first segment and the second segment pass through a third a distance between the first segment and the static current-carrying plate is smaller than a distance between the second segment and the static current-carrying plate; the movable contact is disposed on the first segment; The length of the magnetic plate is greater than or equal to the length of the first segment between the movable contact and the second segment. Preferably, the length of the magnetic conductive plate is less than or equal to a distance between the movable contact and the second segment. Preferably, the electromagnetic relay further includes a fixedly arranged take-off plate, the second segment of the movable spring is fixedly connected to the lead-out plate; and the movable spring is provided with the first segment of the movable contact Adjacent to the static current-carrying plate and disposed away from the static current-carrying plate; the ejecting plate and the static current-carrying plate constitute two lead terminals of the switching device. Preferably, in the width direction of the static current-carrying plate, the width of the magnetic conductive plate is constant. Preferably, the magnetic conductive plate is a soft magnetic material plate. More preferably, the magnetic conductive plate is an iron plate. Preferably, the switching device is a magnetic holding electromagnetic relay. Preferably, the driving component comprises a fixing frame, the fixing frame is pivotally disposed in the cavity; the fixing frame is provided with a push rod, and the push rod passes through the push plate and the moving spring a movable end of the piece is connected to the drive; the housing is provided with a through hole; the push rod passes through the through hole and the one end thereof is located outside the cavity; the push rod is movable in the through hole At least one end of the moving spring is driven by the push plate. In the electromagnetic relay and the shut-off device of the present invention, the magnetic conductive plate is located between the static current-carrying plate and the moving reed, that is, during the transmission path of the magnetic field generated by the static current-carrying plate or the moving reed, when the magnetic field is transmitted to When the magnetic plate is guided, the magnetic field changes the transmission direction and is transmitted along the magnetic conductive plate, so that the magnetic conductive plate can reduce the electromagnetic field strength generated by the moving reed transmitted to the static current-carrying plate, and also reduce the static current-carrying plate transmitted to the moving reed. The intensity of the generated electromagnetic field reduces the ampere force on the static carrier plate and the moving reed. The ampere reduction is reduced to ensure that the moving reed always keeps the moving contact in contact with the stationary contact. Even if the rated current of the controlled circuit is large and the circuit is 30 times the rated current for a short time, the moving reed can keep the moving contact in contact with the static contact, prevent the relay and the switching device from being damaged, and play the control function of the relay and the switching device. The electromagnetic relay and the switching device of the invention have a simple structure and can withstand a short-time current of 30 times the rated current. The invention can reduce the influence of the amperage force, maintain the safety of the electromagnetic relay and the switch device, and broaden the application fields of the relay and the switch device of the structure in which the static current-carrying plate and the dynamic reed current are opposite in direction, thereby avoiding the existing static load. The large-scale modification of the relay and switching device of the structure in which the flow plate and the moving reed are opposite in direction.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic structural view of a magnetic holding electromagnetic relay in the present invention. 2 is a schematic view showing the internal structure of a magnetic holding electromagnetic relay in the present invention.

Figure 3 is a cross-sectional view showing a magnetic holding electromagnetic relay in the present invention.

Fig. 4 is a schematic view showing the structure of the magnetic holding electromagnetic relay in the present invention when no movable member is provided. Figure 5 is a cross-sectional view of the electromagnetic assembly of the present invention.

Figure 6 is a schematic view showing the structure of a movable member in the present invention.

Figure 7 is a cross-sectional view showing a movable member in the present invention.

Figure 8 is a schematic view showing the structure of a switch member in the present invention.

Figure 9 is a side view of the static carrier plate in the present invention.

Figure 10 is a schematic view showing the structure of the movable spring in the present invention.

Figure 11 is a schematic view showing the first use state of the magnetic holding electromagnetic relay in the present invention.

detailed description

The present invention will be described in detail below with reference to the accompanying drawings and embodiments. As shown in FIG. 1 and FIG. 2, the electromagnetic relay 100 includes a housing 110, and the housing 110 is provided with a cavity 120. The electromagnetic module 200 shown in FIG. 5, the rotatable member 300 shown in FIGS. 6 and 7 and the switch member 900 shown in FIGS. 8 to 10 are disposed in the cavity 120. As shown in FIGS. 2, 3, 4, and 5, the electromagnetic assembly includes a coil 210, a core 220, an L-shaped first yoke 230, and an L-shaped second yoke 240. The coil 210 is disposed around the core 220 and is electrically connected to the two pins (211, 212). Two pins (211, 212) are fixedly disposed on the housing 110. The two pins (211, 212) can be respectively connected to the positive and negative poles of the power source to generate a current in the coil 210. Generated in coil 210 At the time of current, the core 220 is made magnetic, and the first end 221 of the core is magnetically opposite to the second end 222. When the current in the opposite direction is passed through the coil 210, the first end 221 of the core is magnetically opposite; the second end 222 of the core is also magnetically opposite. The first end 231 of the L-shaped first yoke is coupled to the first end 221 of the core, and the magnetic force of the first end 221 of the core is transferable to the second end 232 of the L-shaped first yoke. The first end 241 of the L-shaped second yoke is coupled to the second end 222 of the core, and the magnetic force of the second end 222 of the core is transferable to the second end 242 of the L-shaped second yoke. As shown in FIGS. 1, 2, 3, 4, 6, and 7, the movable member 300 includes a holder 310, a permanent magnet 320, a first armature 330, and a second armature 340. The permanent magnet 320, the first armature 330 and the second armature 340 are fixed to the fixing frame 310. There is a gap between the first armature 330 and the second armature 340. As shown in FIG. 7, the first armature 330 and the second armature 340 are located on the right and left sides of the permanent magnet 320, respectively. The first armature 330 and the second armature 340 are both iron plates, and the two are in contact with the left and right ends of the permanent magnet 320, respectively. The first armature 330 and the second armature 340 thus have opposite magnetic properties. The second end 232 of the L-shaped first yoke is located between the first armature 330 and the second armature 340, and the second end 242 of the L-shaped second yoke is located between the first armature 330 and the second armature 340, and The second end 232 of the first yoke has a gap between the second end 232 of the L-shaped yoke and the second end 242 of the yoke, and is located on the upper and lower sides of the permanent magnet 320, respectively. The holder 310 is provided with two pivots 311 (one shown in the drawing), and one of the pivots 311 is rotatably inserted into the mounting hole 121 in the cavity 120. The pivot 311 is located between the first armature 330 and the second armature 340 and is located between the second end 232 of the L-shaped first yoke and the second end 242 of the L-shaped yoke. The holder 310 is pivotable about two pivots 311. A push rod 312 is disposed on the fixing frame 310. A through hole 111 is provided in the housing 110. The push rod 312 passes through the housing 110 from the through hole 111, the end of which is located outside the cavity 120, and the push rod 312 is movable within the through hole 111. When the holder 310 pivots about the pivot 311, the push rod 312 swings within the through hole 111. A transmission member is further disposed in the cavity 120, and the transmission member is a push plate 400. The first end 401 of the push plate is coupled to the push rod 312. A chute 122 is disposed in the cavity 120. The push plate 400 is movably disposed within the chute 122. The chute 122 is for limiting the direction of movement of the push plate 400. When the push rod 312 swings left and right, the push plate 400 is driven to move left and right. As shown in FIGS. 2, 3, 8, 9, and 10, the switch member 900 includes a static carrier plate 500, a lead-out plate 600, and a movable reed 700. The static carrier plate 500 is fixedly disposed on the housing 110. The static current-carrying plate 500 is disposed at the end of the cavity 120 and at the other end of the cavity 120. One end of the static carrier plate 500 located in the cavity 120 is provided with a circular stationary contact 510. The take-up plate 600 is fixedly disposed on the housing 110. One end is located outside the cavity 120 and the other end is located in the cavity 120. The lead-out board 600 and the static current-carrying board 500 constitute two lead terminals of the switch for connecting the circuit. The moving reed 700 is disposed in the cavity 120. The first end 701 of the moving spring is coupled to the push plate 400. When the push plate 400 moves left and right, the first end 701 of the movable spring can be driven to move left and right. The first end 701 and the second end 702 of the moving spring are divided into three sections. The first section 710 and the second section 720 are disposed opposite to the static current-carrying plate 500 and parallel to the static current-carrying plate 500. The distance between the first segment 710 of the moving spring and the static carrier plate 500 is less than the distance between the second segment 720 and the static carrier plate 500. The first segment 710 of the moving spring is coupled to the second segment 720 by a third segment 730. The second end 702 of the moving spring is coupled to the take-up plate 600. The moving spring 700 has a certain elasticity so that the first end 701 can be driven to move by the push plate 400 with the second end 702 fixed. A first movable section 740 is provided on the first section 710. The distance between the movable contact 740 and the third segment 730 is L1. The vertical length of the third segment 730 is L3, that is, between the first segment 710 and the second segment 720. The distance is L3. The movable contact 740 is disposed opposite to the left and right of the stationary contact 510. When the push plate 400 drives the first end 701 of the moving reed to move, the movable contact 740 moves to move into contact with or separate from the stationary contact 510 as the first end 701 of the moving reed moves. A magnetic conductive plate 800 is disposed between the static carrier plate 500 and the movable reed 700. The magnetic conductive plate 800 is an iron plate having magnetic permeability. The magnetic conductive plate 800 is fixedly mounted on the static current-carrying plate 500. The width of the magnetic conductive plate 800 is the same as the width of the static current carrying plate 500. The length of the magnetic conductive plate 800 is L2. L2 is greater than L1 but less than the sum of L1 and L3. The magnetic conducting plate 800 has an arcuate notch 801, and a portion of the stationary contact 510 is located within the arcuate notch 801. The magnetic conductive plate 800 in the present invention may not be provided with the notch 801, and the length of the magnetic conductive plate 800 does not change in the width direction of the static current-carrying plate 500. The magnetic conductive plate 800 in the present invention may be formed in a plate shape using a soft magnetic material. The top, bottom, left, and right in the present invention are relative concepts. The magnetic holding electromagnetic relay of the present invention is used as follows: As shown in Fig. 11, the first armature 330 and the second armature 340 are both in contact with the permanent magnet 320 and are magnetic, and the two are magnetically opposite. The lower end of the first armature 330 is in close contact with the L-shaped second yoke 240 by magnetic attraction, and the upper end of the second armature 340 is in close contact with the L-shaped first yoke 230 by magnetic attraction. At this time, the push rod 312 is located at the rightmost end of the through hole 111. By pushing the push plate 400, the push rod 312 maintains the first end 701 of the movable spring in the rightmost position, so that the movable contact 740 and the stationary contact 510 are in a separated state and the farthest distance. The switch member 900 is in an open state. On the basis of the first use state, after the first armature coil 210 is energized, both the L-shaped first yoke 230 and the L-shaped second yoke 240 generate magnetism. The magnetic properties of the L-shaped first yoke 230 and the magnetic phase of the first armature 330 In contrast, it is magnetically identical to the second armature 340. The magnetic force of the L-shaped second yoke 240 is the same as that of the first armature 330, and is magnetically opposite to the second armature 340. Due to the magnetic attraction and repulsion, the upper end of the first armature 330 is attracted to the left by the L-shaped first yoke 230, and the lower end of the first armature is subjected to the repulsive force of the L-shaped second yoke 240 to the right; The upper end is subjected to the leftward repulsive force of the L-shaped first yoke 230, and the lower end of the second armature is attracted to the right by the L-shaped second yoke 240. Under the action of the magnetic force, the fixing frame 310 pivots counterclockwise about the pivot 311 until the upper end of the first armature 330 is in close contact with the L-shaped first yoke 230, and the lower end of the first armature 330 and the L-shaped second yoke 240 Tight. When the holder 310 rotates counterclockwise, the push rod 312 moves to the left. By the transmission of the push plate 400, the push rod 312 drives the first end 701 of the moving spring to move to the left, and the distance between the movable contact 710 and the stationary contact 510 is reduced. Continuing to maintain the current in the coil 210, the L-shaped first yoke 230 and the L-shaped second yoke 240 continue to maintain the direction of the force of the first armature 330 and the second armature 340. The fixing frame 310 continues to rotate counterclockwise until the upper end of the first armature 330 is in close contact with the L-shaped first yoke 230 due to magnetic attraction, and the lower end of the second armature 340 is in close contact with the L-shaped body due to magnetic attraction. Two yokes 240. At this time, the push rod 312 is moved to the leftmost end of the through hole 111. By the transmission of the push plate 400, the push rod 312 drives the first end 701 of the moving spring to move to the left until the movable contact 710 comes into contact with the stationary contact 510. When the movable contact 710 is in contact with the stationary contact 510, the switch member 900 is in a closed state, which can form a current path. With the electromagnetic property of the electromagnetic component, the movable contact 710 and the stationary contact 510 can be kept in contact, and the switch member 900 is always in a closed state. Even if the coil 210 is de-energized at this time, the first armature 330 and the second armature 340 can be attracted to the L-shaped first yoke 230 and the L-shaped second yoke 240 by the magnetic forces of the first armature 330 and the second armature 340. , thus maintaining the state shown in FIG. 2. To disconnect the switch component 900, only the current in the opposite direction is passed through the coil 310. The direction of the force of the first armature 330 of the L-shaped first yoke 230 and the second-type second yoke 240 is the same as the second use state. The time is opposite. The direction of the force of the L-shaped first yoke 230 and the L-shaped second yoke 240 on the second armature 340 is opposite to that in the second use state. The holder 310 thus rotates clockwise to the first state shown in Figure 11, and the movable contact 710 is separated from the stationary contact 510. At this time, the switch member 900 is in the off state, and the circuit is cut off. Due to the position of the socket of the socket, the distance between the static carrier plate and the take-up plate outside the cavity 120 is determined. In order to reduce the contact angle between the movable contact 710 and the stationary contact 510 and make the contact area larger when the two are in contact, the distance between the first segment 710 of the movable spring 710 and the second segment 720 in the present invention is The static carrier plate 500 is closer. Therefore, the ampere force between the static carrier plate 500 and the first segment 710 of the moving reed 700 is greater. When the instantaneous current is 30 times the rated current, the ampere force can exceed the thrust of the movable reed 700 of the electromagnetic assembly 200, and the movable contact 710 is separated from the stationary contact 510, thereby cutting off the circuit. This condition is a malfunction of the magnetic holding electromagnetic relay and does not meet the requirements for use. In the present invention, a magnetic conductive plate 800 is disposed between the static carrier sheet 500 and the movable reed 700, which can guide the electromagnetic force of the static carrier sheet 500 or the moving reed 700, and reduce the electromagnetic force across the magnetic conducting plate 800. Thereby reducing the ampere force between the static carrier plate 500 and the moving reed 700. The width of the magnetically permeable plate 800 is the same as the width of the static current-carrying plate 500, which can minimize the influence of the amperage. Since the ampere force between the static carrier plate 500 and the first segment 710 of the moving spring is the largest, the length of the magnetic conductive plate 800 covers the length of the first segment between the movable contact 710 and the third segment 730. Fully ampere impact while saving material. The push rod of the present invention protrudes out of the cavity, and when the electromagnetic component fails, the opening and closing of the switch component can be manually controlled, and the use is safer. The embodiments of the present invention are intended to be illustrative only and not to limit the scope of the claims, and other substantially equivalent alternatives that can be devised by those skilled in the art are within the scope of the invention.

Claims

1. An electromagnetic relay, comprising: a fixedly disposed static current-carrying plate, the static current-carrying plate has a first end and a second end, the first end of the static current-carrying plate is provided with a static contact; and at least one end is movable a reed, the movable reed is provided with a movable contact; the movable reed is provided with at least one end of the movable contact movable to contact the movable contact and can be separately disposed; Wherein, a magnetic conductive plate is disposed between the static current-carrying plate and the movable spring plate, and the magnetic conductive plate is disposed on the static current-carrying plate, on the moving spring plate or between the static current-carrying plate and the moving spring plate, and a position in contact with the static current-carrying plate and the movable spring; the magnetic conductive plate reduces the static current-carrying plate and the moving spring when the movable contact is in contact with the static contact Ampere between the pieces.

2. The electromagnetic relay according to claim 1, wherein the moving spring has a first end and a second end, and the movable contact is disposed at the first end; the first end and the first end The distance of the static carrier plate is less than the distance between the second end and the static carrier plate.

3. The electromagnetic relay according to claim 1, wherein the direction in which the static current-carrying plate extends from the provision of the static contact is the same as the direction in which the movable spring automatic contact extends, when the dynamic contact When the point is in contact with the static contact to turn on the current, the static current-carrying plate and the moving reed have a current opposite to each other.

5倍。 The width of the static current-carrying plate is one-half to 1.5 times the width of the static current-carrying plate.

The electromagnetic relay according to claim 4, wherein the width of the magnetic conductive plate is the same as the width of the static current carrying plate.

The electromagnetic relay according to claim 4, wherein a width of the magnetic conductive plate is larger than a width of the static current-carrying plate and less than 1.5 times a width of the static current-carrying plate.

The electromagnetic relay according to claim 1, wherein the moving spring has a first segment opposite to the static current-carrying plate and a second segment opposite to the static current-carrying plate; The segment is connected to the second segment through the third segment; the distance between the first segment and the static current-carrying plate is smaller than the distance between the second segment and the static current-carrying plate; The magnetic conductive plate is disposed between the static contact and the second end; the length of the magnetic conductive plate extending from the static contact is greater than or equal to the distance between the movable contact and the third segment.

8. The electromagnetic relay according to claim 7, wherein the length of the magnetic conductive plate is less than or equal to a distance between the movable contact and the second segment.

The electromagnetic relay according to claim 7, wherein the electromagnetic relay further comprises a fixedly arranged take-off plate, the second segment of the movable spring is fixedly connected to the lead-out plate; The first section of the movable contact may be disposed adjacent to the static current-carrying plate and away from the static current-carrying plate; the lead-out plate and the static current-carrying plate constitute two lead terminals of the switch.

10. The electromagnetic relay according to claim 1, wherein a length of the magnetic conductive plate does not change in a width direction of the static current-carrying plate.

The electromagnetic relay according to any one of claims 1 to 10, wherein the electromagnetic relay further comprises a housing, the housing is provided with a cavity; the static current-carrying plate is disposed at the Description The first end is located in the cavity, and the second end is located outside the cavity; the moving spring is disposed in the cavity, and the lead plate is disposed on the housing, and the two ends of the lead plate are respectively located in the cavity Outside the cavity; one end of the moving reed is not provided with the movable contact is connected with the lead-out plate; the electromagnetic component is arranged in the cavity; the electromagnetic component drives the moving reed to move to contact and separate the movable contact from the static contact.

12. The electromagnetic relay according to claim 1, wherein the magnetic conductive plate is a soft magnetic material plate.

13. The electromagnetic relay according to claim 12, wherein the magnetic conductive plate is an iron plate.

14. The switch device, comprising: a housing, the housing is provided with a cavity; a fixed static carrier plate, the static carrier plate has a first end and a second end, and a static current carrying plate The first end is provided with a static contact; the first end of the static contact is disposed in the cavity, and the second end not provided with the static contact is located outside the cavity; the movable spring at least one end is movable, the moving spring The movable end of the movable piece is disposed in the cavity; the movable end of the movable spring is provided with a movable contact; the movable end of the movable spring moves to contact the movable contact and the static contact Separating; a magnetic conductive plate, the magnetic conductive plate is located between the static current carrying plate and the moving spring plate, the magnetic conductive plate is disposed on the static current carrying plate, the moving spring plate or the a position between the static carrier plate and the moving reed and not in contact with the static carrier plate and the moving reed; a driving component, the driving component is drivingly connected to the moving reed, the driving Component drive The movable end of the reed moves to contact and separate the movable contact from the stationary contact.

The shutoff device according to claim 14, wherein the driving member is an electromagnetic driving member.

16. The smashing device according to claim 15, wherein the electromagnetic driving component comprises a coil, a core, a yoke and an armature; the coil is disposed around the core, the yoke and the yoke The iron core is connected, the armature has magnetic properties; when the coil is energized, the iron core and the yoke generate magnetism; and the armature is magnetically driven by the yoke after the magnetic yoke is magnetically generated Movement; the moving armature drives the movable reed to move one end of the movable contact.

17. The switching device according to claim 16, wherein the yoke includes an L-shaped first yoke and an L-shaped second yoke; a first end of the L-shaped first yoke and the first end a first end of the iron core is connected, a first end of the L-shaped second yoke is connected to a second end of the iron core; the armature comprises a first armature, and the first armature is rotatably disposed; When the coil is energized, both ends of the first armature are respectively attracted and repelled by the second end of the L-shaped first yoke and the second end of the L-shaped second yoke.

The switch device according to claim 17, wherein the armature further comprises a second armature, the first armature is disposed in linkage with the second armature and has a gap therebetween; the L-shaped first yoke a second end is located in a gap between the first armature and the second armature; a second end of the L-shaped second yoke is located in a gap between the first armature and the second armature When the coil is energized, the second end of the L-shaped first yoke has the same force direction of the first armature and the second armature on both sides thereof, and the L-shaped second magnetic The second end of the yoke has the same force direction of the first armature and the second armature on both sides thereof, and the second end of the L-shaped first yoke and the L-shaped end a second end of the second yoke opposite to the first armature force on the same side thereof, a second end of the L-shaped first yoke and a second end of the L-shaped second yoke The second armature forces on the same side thereof are opposite in direction.

19. The switching device of claim 18, wherein the first armature and the second armature are magnetically opposite.

The switch device according to claim 18, wherein the first armature and the second armature are disposed on a fixing frame; the fixing frame is provided with a pivot, and the pivot is located at the Between the first armature and the second armature, and between the second end of the L-shaped first yoke and the second end of the L-shaped second yoke; the pivot is rotatably disposed The fixing frame is in driving connection with one end of the moving spring on which the movable contact is disposed.

The switch device according to claim 20, further comprising a push plate, wherein the cavity is provided with a sliding slot; the push plate is movable in the sliding slot to make the push plate It is only movable in a direction in which the movable contact can be brought closer to and away from the stationary contact.

The switch device according to claim 21, wherein the armature holder is provided with a push rod; one end of the push plate is connected to one end of the movable spring, and the other end is connected to the push rod The push rod can drive at least one end of the moving spring to move by the push plate.

The switch device according to claim 22, wherein the fixing frame is provided with a permanent magnet; the first armature and the second armature are iron plates; the first armature and the seat The second armature is in contact with both ends of the permanent magnet.

The switch device according to claim 14, wherein the moving spring has a first And the second end, the movable contact is disposed at the first end of the moving spring; the distance between the first end of the moving spring and the static current carrying plate is smaller than the second end of the moving spring The distance of the static carrier plate.

The switch device according to claim 14, wherein a direction in which the static current-carrying plate extends from the provision of the static contact and a direction in which the movable spring extends from the movable contact Similarly, when the movable contact is in contact with the static contact to turn on a current, the static current-carrying plate and the moving reed have a current opposite to each other.

The switch device according to claim 14, wherein the width of the magnetic conductive plate is one-half to 1.5 times the width of the static current-carrying plate.

The switch device according to claim 26, wherein the width of the magnetic conductive plate is the same as the width of the static current-carrying plate.

The switch device according to claim 26, wherein a width of the magnetic conductive plate is larger than a width of the static current-carrying plate and less than 1.5 times a width of the static current-carrying plate.

The switch device according to claim 14, wherein the moving spring has a first segment opposite to the static current carrying plate and a second segment opposite to the static current carrying plate; The first segment is connected to the second segment through a third segment; the distance between the first segment and the static current-carrying plate is smaller than the distance between the second segment and the static current-carrying plate; And being disposed on the first segment; the length of the magnetic conductive plate is greater than or equal to a length of the first segment between the movable contact and the second segment.

30. The switching device of claim 29, wherein the length of the magnetically permeable plate is less than a distance between the movable contact and the second segment.

31. The switching device of claim 30, wherein the electromagnetic relay further comprises a second set of the movable spring is fixedly connected to the lead-out plate; the movable spring has a first section of the movable contact that is adjacent to the static current-carrying plate and can be away from The static current-carrying plate is disposed; the lead-out plate and the static current-carrying plate constitute two lead terminals of the switching device.

The switch device according to claim 14, wherein a width of the magnetic conductive plate does not change in a width direction of the static current-carrying plate.

The switch device according to claim 14, wherein the magnetic conductive plate is a soft magnetic material plate.

The switch device according to claim 33, wherein the magnetic conductive plate is an iron plate.

The switching device according to claim 14, wherein the switching device is a magnetic holding electromagnetic relay.

The switch device according to claim 14, wherein the driving component comprises a fixing frame, the fixing frame is pivotally disposed in the cavity; and the mounting frame is provided with a push rod. The push rod is connected to the movable end of the movable spring by a push plate; the housing is provided with a through hole; the push rod passes through the housing from the through hole and one end thereof is located outside the cavity; The push rod is movable within the through hole to drive at least one end of the moving spring through the push plate.