CN115763159A - Non-maintaining pull-in current direct current relay - Google Patents

Abstract

The invention relates to the technical field of relays, and provides a non-maintaining attraction current direct current relay which comprises an outer cover, a fixed frame, a circuit board, a first coil frame, a second coil frame, a first magnetic coil, a second magnetic coil, a group of public contact pieces, at least one group of normally closed contact pieces, at least one group of normally open contact pieces, a group of control contact pieces, magnetic steel, a magnetic steel support, a group of connecting wires and a group of movable contact pieces. The invention solves the problem of energy consumption caused by the fact that the current needs to be maintained when the existing relay keeps pull-in for a long time.

Description

Non-maintaining pull-in current direct current relay

Technical Field

The invention relates to the technical field of relays, in particular to a non-maintaining pull-in current direct current relay.

Background

In the process of electrifying and operating the existing relay, a coil of the existing relay always keeps certain maintaining current and consumes certain electric energy to maintain the attraction force of the existing relay, the maintaining current coil generates a magnetic field to attract a contact piece connecting rod, the attracting contact piece connecting rod bounces off a magnetic pole face of the coil under the action of a spring when the coil is cut off, and the contact piece finishes the on-off of one group of switches and the on-off of the other group of switches. Although the holding current of the coil is not large during the operation of the relay, when the state needs to be maintained for a long time in some application scenes, the long-time accumulation causes not small energy consumption. For example, in the series-parallel connection use of lithium batteries, when the relay is used at an overcharge point or overdischarge and when the battery is overheated, a single battery is removed from a battery pack, so that higher-level protection for saving energy is realized, and at the moment, the relay needs to maintain current consumption for a long time, so that how to effectively reduce the power consumption of the relay is an urgent problem to be solved.

Disclosure of Invention

Therefore, aiming at the problems, the invention provides a non-maintaining pull-in current direct current relay which has the advantages of simple and reasonable structure, low manufacturing cost, energy conservation in use and no need of maintaining pull-in current to consume energy.

In order to solve the technical problem, the invention adopts the following scheme: a non-maintaining attraction current direct current relay comprises an outer cover, a fixing frame, a circuit board, a first coil frame, a second coil frame, a first magnetic coil, a second magnetic coil, a group of common contact pieces, at least one group of normally closed contact pieces, at least one group of normally open contact pieces and a group of control contact pieces, wherein the circuit board is arranged at the top of the fixing frame, the group of common contact pieces, the at least one group of normally closed contact pieces, the at least one group of normally open contact pieces and the group of control contact pieces are parallelly and parallelly arranged on a bottom plate of the fixing frame in a penetrating manner, the outer cover is covered on the fixing frame and connected with the periphery of the upper surface of the bottom plate of the fixing frame, the non-maintaining attraction current direct current relay also comprises magnetic steel, a magnetic steel bracket, a group of connecting wires and a group of movable contact pieces, the first magnetic coil and the second magnetic coil are respectively arranged on the first coil frame and the second coil frame, the first coil frame and the second coil frame are symmetrically arranged at the left part and the right part in the fixing frame, and the first coil frame and the second coil frame are arranged at intervals, the iron core end faces of the first magnetic coil and the iron core end faces of the second magnetic coil are coaxially oriented, the iron core ends of the first magnetic coil and the second magnetic coil which are oriented to each other are in the same magnetic pole after being electrified, the magnetic steel support can be horizontally arranged between the first coil frame and the second coil frame, the magnetic steel is arranged on the magnetic steel support, the magnetic poles of the two end faces of the magnetic steel are opposite in polarity, two end faces of the magnetic steel are respectively opposite to the iron core end face of the first magnetic coil and the iron core end face of the second magnetic coil, one group of common contact blades are arranged in the fixing frame, one end of each group of common contact blades is respectively connected with one group of movable contact blades through one group of connecting wires, one group of movable contact blades are arranged at the bottom of the magnetic steel support and are arranged between one end of each group of normally closed contact blades and one group of normally closed contact blades and normally open contact blades, the switch K of the circuit board is arranged on one side of the circuit board and is arranged on the normally closed contact blade side edge, the magnetic steel bracket is characterized in that a switch K on one side of the top of the magnetic steel bracket is provided with a conducting pressing plate for closing the switch K or opening the switch K, the circuit board is provided with a positive and negative current control circuit of a magnetic coil, the power end of the positive and negative current control circuit of the magnetic coil is connected with a group of control contact pieces, the positive and negative current control circuit of the magnetic coil is connected with a first magnetic coil and a second magnetic coil, and the positive and negative current control circuit of the magnetic coil controls the iron core of the first magnetic coil and the iron core of the second magnetic coil to carry out magnetic pole change adsorption or flick the magnetic steel to drive the magnetic steel bracket to move so as to drive the contacts of a group of movable contact pieces to be connected with each group of normally open contact pieces or each group of normally closed contact pieces.

Further, the positive and negative current control circuit of the magnetic coil comprises a switch K, diodes D1, D2, D3, a field effect transistor T1, triodes T2, T3, a capacitor C1, resistors R1, R2, R3, and R4, wherein the anode of the diode D1, one end of the switch K, one end of the resistor R1, and the gate of the field effect transistor T1 are all connected with the positive electrode + Ec of the power supply, the cathode of the diode D1 is connected with the source of the field effect transistor T1 and one end of the capacitor C1, the other end of the switch K is connected with one end of a resistor R3 at one end of the first magnetic coil L1, the collector of the triode T2, the anode of the diode D2, and the cathode of the diode D3, the other end of the first magnetic coil L1 is connected with one end of the magnetic coil L2, the drain of the second magnetic coil L2 is connected with the other end of the field effect transistor T1, one end of the resistor R4, one end of the resistor R2 and the collector of the triode T3, the other end of the resistor R4 is connected with the cathode of the base of the diode D2 and the emitter of the triode T3, and the other end of the emitter of the other triode T3.

Further, the switch K of circuit board is the copper foil pad that two intervals set up, magnet steel support's the clamp plate that switches on includes the intercommunication baffle and locates two buckle contacts at intercommunication baffle both ends, two buckle contacts set up and two copper foil pad looks adaptations of switch K of circuit board, the circuit board is located switch K department and is equipped with the fluting that supplies intercommunication baffle to remove on the magnet steel support, magnet steel support's intercommunication baffle removes two copper foil pads that drive two buckle contacts and switch K and is connected messenger switch K intercommunication or two buckle contacts and switch K's two copper foil pad separation messenger switch K disconnection.

Furthermore, the one end both sides that first coil former and second coil former moved towards each other are equipped with the guide way respectively, and the magnet steel support both sides are located first coil former and second coil former guide way horizontal correspondence department and are equipped with to both ends extend and with the gib block of guide way looks adaptation, but magnet steel support's gib block lateral shifting wear to locate on the guide way of first coil former and second coil former.

Furthermore, the magnetic steel is neodymium iron boron magnetic steel.

By adopting the technical scheme, the invention has the beneficial effects that: the magnetic steel is arranged on the magnetic steel bracket, the magnetic poles of the two end faces of the magnetic steel are opposite in polarity, the two end faces of the magnetic steel are respectively opposite to the end face of the iron core of the first magnetic coil and the end face of the iron core of the second magnetic coil, the positive and negative current control circuits of the magnetic coils are arranged to control the iron core of the first magnetic coil and the iron core of the second magnetic coil to carry out current reverse change so that the magnetic poles of the iron core are changed to adsorb or flick the magnetic steel to drive the magnetic steel bracket to move and further drive the contacts of a group of movable contact pieces to be connected with the normally open contact pieces or the normally closed contact pieces, and the magnetic steel is adsorbed and connected with the iron core of the first magnetic coil or the iron core of the second magnetic coil according to the use requirement in normal use so that the group of movable contact pieces on the magnetic steel bracket is connected with the normally open contact pieces or the normally closed contact pieces to keep the normally open contact pieces or the normally closed contact pieces, when the group of control contact pieces are electrified, the polarity of the iron core magnetic pole of the first magnetic coil adsorbing the magnetic steel is changed to boost the magnetic steel to the iron core of the second magnetic coil, and the iron core of the second magnetic coil generates magnetic pole magnetism different from that of the magnetic steel to adsorb the magnetic steel to the iron core of the second magnetic coil, so that the magnetic steel bracket moves towards the second magnetic coil to drive the group of movable contact pieces to be disconnected with the group of normally open contact pieces or connected with the group of normally closed contact pieces to realize closing, when the group of control contact pieces are powered off, the polarity of the iron core magnetic pole of the second magnetic coil adsorbing the magnetic steel is changed to boost the magnetic steel to the iron core of the first magnetic coil, and the iron core of the first magnetic coil generates magnetic pole polarity different from that of the magnetic steel to adsorb the magnetic steel to the iron core of the first magnetic coil, so that the magnetic steel bracket forgets the movement of the first magnetic coil to drive the group of movable contact pieces to be connected with the group of normally open contact pieces or connected with the group of normally closed contact pieces The contact is disconnected to realize closing, the normally open or normally closed switching is realized, the attraction state before the power is on is automatically and stably recovered when the power is off, the relay can keep the attraction state without the energy consumption of the attraction maintaining current, the structure is simple and reasonable, the manufacturing cost is low, the energy is saved in use, and the relay can be widely popularized and applied.

Drawings

FIG. 1 is a schematic diagram of a portion of an embodiment of the present invention;

FIG. 2 is a partially exploded view of an embodiment of the present invention;

figure 3 is a circuit schematic of a magnetic coil forward and reverse current control circuit of an embodiment of the present invention.

Detailed Description

The invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1-3, a preferred non-maintaining attraction current dc relay of the present invention comprises a transparent cover, a fixed frame 1, a circuit board 2, a first coil frame 3, a second coil frame 4, a first magnetic coil, a second magnetic coil, a magnetic steel 5, a magnetic steel support 6, a set of connecting wires 7, a set of movable contacts 8, a set of common contacts 9, a set of normally closed contacts 10, a set of normally open contacts 11 and a set of control contacts 12, wherein the circuit board 2 is a PCB circuit board and the circuit board 2 is arranged on the top of the fixed frame 1, the set of common contacts 9, the set of normally closed contacts 10, the set of normally open contacts 11 and the set of control contacts 12 are parallelly and parallelly arranged on the bottom plate 101 of the fixed frame 1, the transparent cover is arranged on the fixed frame 1 and connected with the upper surface of the bottom plate 101 of the fixed frame 1 along the circumference, the transparent cover is used for protecting structural components and the fixed frame 1 arranged above the bottom plate of the fixed frame 1 from dust and the like, the first magnetic coil and the second magnetic coil are respectively arranged on the first coil frame 3 and the second coil frame 4, the first coil frame 3 and the second coil frame 4 are arranged on the fixed frame 4, the magnetic coil frame 4 and the magnetic coil 5 are arranged on the fixed frame 1, the iron core 6, the magnetic coil 5 and the magnetic coil 5 are arranged on the iron core 4, the fixed frame, the iron core 4, the iron core 5, a group of movable contact pieces 8 are arranged at the bottom of the magnetic steel bracket 6 and positioned between a group of normally closed contact pieces 10 and a group of normally open contact pieces 11 positioned at one end of the fixed frame 1, two sides of one end, facing each other, of the first coil frame 3 and the second coil frame 4 are respectively provided with a guide groove 31 and a guide groove 41, two sides of the magnetic steel bracket 6 are positioned at the horizontal corresponding positions of the guide grooves 31 and the guide grooves 41 of the first coil frame 3 and the second coil frame 4 and are provided with guide strips 61 extending to two ends and matched with the guide grooves 31 and 41, the guide strips 61 of the magnetic steel bracket 6 can transversely move and penetrate through the guide grooves 31 and 41 of the first coil frame 3 and the second coil frame 4, a switch K of the circuit board 2 is arranged at one side of the circuit board 2 and positioned at the side edge of the group of normally closed contact pieces 10, the switch K of the circuit board 2 is a welding pad arranged at two intervals, one side of the top of the magnetic steel bracket 6 is positioned at the switch K of the circuit board 2 and is provided with a conducting pressing plate 62 of the closed switch K or the open switch K of the open switch K, the conducting press plate 62 of the magnetic steel bracket 6 comprises a communicating guide plate and two buckle contacts arranged at two ends of the communicating guide plate, the two buckle contacts are arranged to be matched with two copper foil bonding pads of a switch K of the circuit board 2, a slot for the magnetic steel bracket 6 to move is arranged at the switch K of the circuit board 2, the communicating guide plate of the magnetic steel bracket 6 moves to drive the two buckle contacts to be connected with the two copper foil bonding pads of the switch K so that the switch K is communicated or the two buckle contacts are separated from the two copper foil bonding pads of the switch K so that the switch K is disconnected, a positive and negative current control circuit of a magnetic coil is arranged on the circuit board 2, a power supply end of the positive and negative current control circuit of the magnetic coil is connected with a group of control contact plates 12, the positive and negative current control circuit of the magnetic coil is connected with a first magnetic coil and a second magnetic coil, and the positive and negative current control circuit of the magnetic coil controls the iron core of the first magnetic coil and the magnetic coil to carry out forward and reverse current of the magnetic pole of the iron core of the second magnetic coil The change adsorbs or flicks magnet steel 5 and drives magnet steel support 6 to move and then drives the contact of a set of movable contact piece 8 to be connected with a set of normally open contact piece 11 or a set of normally closed contact piece 10.

Referring to fig. 3, the magnetic coil forward and reverse current control circuit includes a switch K, diodes D1, D2, D3, a field effect transistor T1, triodes T2, T3, a capacitor C1, resistors R1, R2, R3, R4, the positive electrode of the diode D1, one end of the switch K, one end of the resistor R1 and the grid electrode of the field effect transistor T1 are all connected with the positive electrode + Ec of the power supply, the negative electrode of the diode D1 is connected with the source electrode of the field effect transistor T1 and one end of the capacitor C1, the other end of the switch K is connected with one end of a resistor R3 at one end of a first magnetic coil L1, a collector electrode of the triode T2, the positive electrode of the diode D2 and the negative electrode of the diode D3, the other end of the first magnetic coil L1 is connected with one end of a second magnetic coil L2, the other end of the drain electrode of the field effect transistor T1, one end of a resistor R4, one end of the resistor R2 and a collector electrode of the triode T3, the other end of the resistor R4 is connected with the diode D2 and the positive electrode of the triode D3, the other end of the triode D2 is connected with a base electrode of the triode T2, the other emitter electrode of the triode T2, the other end of the other resistor R1, the emitter electrode of the triode T3 is connected with the other end of the triode T2, the other end of the other resistor R1, the other end of the resistor R3 and the other end of the triode T3, and the other resistor R3, and the emitter electrode of the triode T3, and the other end of the other resistor R3 are connected with the other resistor R3, and the emitter electrode of the triode T3, and the other resistor R3, and the other end of the other resistor R3.

The working principle of the magnetic coil positive and negative current control circuit is as follows: when + Ec is powered on, the switch K on the circuit board 2 is in a connected state under the connection of two buckle contacts of the conducting pressing plate 62 of the magnetic steel bracket 6, the capacitor C1 is charged through the diode D1, the triode T3 is connected by the switch K, the triode T3 is not connected due to the high level of the base, and the triode T2 is also not connected, at this time, the coil current flows from the first magnetic coil L1 to the second magnetic coil L2, so that the polarity of the iron core magnetic pole on the first magnetic coil L1 is reversed, the magnetic steel 5 is pushed towards the iron core of the second magnetic coil L2, and meanwhile, the iron core of the second magnetic coil L2 is also used for adsorbing the magnetic steel due to the change of the magnetic pole polarity, so that the magnetic steel bracket 6 moves towards the iron core of the second magnetic coil L2, the two buckle contacts of the conducting pressing plate 62 of the magnetic steel bracket 6 are separated from the switch K, so that the switch K is disconnected, and the contacts of the movable contact 8 on the magnetic steel bracket 6 are changed from being connected with a group of normally open contacts 11 into being connected with a group of normally closed contacts 10; when the + Ec is powered off, the capacitor C1 is discharged, the diode D1 is not conducted, the field effect transistor T1 is conducted due to a low level of a grid electrode, the triode T2 is conducted, the triode T3 is not conducted due to a low level of a base electrode, at the moment, a coil current flows to the first magnetic coil L1 from the second magnetic coil L2, so that the polarity of a magnetic pole of an iron core on the second magnetic coil L2 is reversed, the magnetic steel is pushed towards the iron core of the first magnetic coil L1, meanwhile, the iron core of the first magnetic coil L1 also adsorbs the magnetic steel due to the change of the polarity of the magnetic pole, the magnetic steel bracket 6 moves towards the iron core of the first magnetic coil L1, two buckle contacts of the conducting pressing plate 62 of the magnetic steel bracket 6 are in contact with the switch K to enable the switch K to be communicated, the contacts of the movable contact pieces 8 on the magnetic steel bracket 6 are changed from being connected with the group of normally closed contact pieces 10 to being connected with the group of normally open contact pieces 11, and the capacitor C1 is low in voltage after being discharged, so that the attraction state before being recovered to be powered on.

The magnetic steel can be neodymium iron boron magnetic steel or other magnetic steel keeping strong magnetic attraction, the outer cover can be made of opaque plastics, and the like, the number of the contacts of the normally open contact pieces and the normally closed contact pieces can be increased to two groups or three groups according to the pin setting requirements of the relay, the number of the contacts of the movable contact pieces is only required to be correspondingly matched with the number of the normally open contact pieces and the normally closed contact pieces, and the positive and negative current control circuit of the magnetic coil can also be other control circuits capable of enabling the magnetic poles of the first magnetic coil L1 and the second magnetic coil L2 to be changed.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (5)

1. The utility model provides a do not have actuation current direct current relay that maintains, includes dustcoat, mount, circuit board, first coil former, second coil former, first magnetic coil, second magnetic coil, a set of public contact, at least a set of normally closed contact, at least a set of normally open contact and a set of control contact, the mount top is located to the circuit board, and a set of public contact, at least a set of normally closed contact, at least a set of normally open contact and a set of control contact are parallel to wear to locate on the mount bottom plate side by side, the dustcoat cover is located on the mount and is connected its characterized in that along the bottom plate upper surface week of mount: the magnetic steel is arranged on the magnetic steel bracket, the two end faces of the magnetic steel are opposite in magnetic pole polarity, the two end faces of the magnetic steel are respectively opposite to the end face of the iron core of the first magnetic coil and the end face of the iron core of the second magnetic coil, the group of common contacts are positioned in the fixing frame, one end of each common contact is respectively connected with the group of movable contacts through the group of connecting wires, the group of movable contact pieces are arranged at the bottom of the magnetic steel support and located between the normally closed contact pieces and the normally open contact pieces in the fixing frame, the contacts of the group of movable contact pieces are matched with the groups of normally closed contact pieces and normally open contact pieces, the switch K of the circuit board is arranged on one side of the circuit board and located on the side edge of the normally closed contact pieces, the conducting pressing plate of the closed switch K or the open switch K is arranged on the switch K of the circuit board on one side of the top of the magnetic steel support, a positive and negative current control circuit of a magnetic coil is arranged on the circuit board, the power end of the positive and negative current control circuit of the magnetic coil is connected with the group of control contact pieces, the positive and negative current control circuit of the magnetic coil is connected with a first magnetic coil and a second magnetic coil, the positive and negative current control circuit of the magnetic coil controls the iron core of the first magnetic coil and the iron core of the second magnetic coil to carry out magnetic pole change adsorption or bounce to drive the magnetic steel support to move so as to drive the contacts of the group of the normally open contact pieces and the groups of the movable contact pieces Or each group of normally closed contact pieces.

2. The no-maintenance pull-in current direct current relay according to claim 1, characterized in that: the positive and negative current control circuit of the magnetic coil comprises a switch K, a diode D1, a diode D2, a diode D3, a field effect transistor T1, a triode T2, a triode T3, a capacitor C1, a resistor R2, a resistor R3 and a resistor R4, wherein the anode of the diode D1, one end of the switch K and the grid electrode of the field effect transistor T1 are all connected with a power anode + Ec, the cathode of the diode D1 is connected with the source electrode of the field effect transistor T1 and one end of the capacitor C1, the other end of the switch K is connected with one end of a resistor R3 at one end of a first magnetic coil L1, the collector of the triode T2, the anode of the diode D2 and the cathode of the diode D3, the other end of the first magnetic coil L1 is connected with one end of a second magnetic coil L2, the other end of the second magnetic coil L2 is connected with the drain electrode of the field effect transistor T1, one end of the resistor R4, one end of the resistor R2 and the collector of the triode T3, the cathode of the resistor R4 is connected with the cathode of the diode D2 and the cathode of the diode D3, the base of the other end of the emitter of the triode T2 is connected with the emitter of the other triode T3, and the other end of the resistor R3.

3. The non-maintaining pull-in current direct current relay according to claim 2, characterized in that: switch K of circuit board is the copper foil pad that two intervals set up, magnet steel support's the clamp plate that switches on includes the intercommunication baffle and locates two buckle contacts at intercommunication baffle both ends, two buckle contacts set up and two copper foil pad looks adaptations of switch K of circuit board, the circuit board is located switch K department and is equipped with the fluting that supplies intercommunication baffle to remove on the magnet steel support, magnet steel support's intercommunication baffle removes and drives two buckle contacts and two copper foil pads of switch K and be connected and make switch K intercommunication or two buckle contacts and two copper foil pad separation of switch K make switch K break off.

4. The non-maintaining pull-in current direct current relay according to claim 1, characterized in that: the one end both sides that first coil former and second coil former moved towards each other are equipped with the guide way respectively, and magnet steel support both sides are located first coil former and second coil former guide way horizontal correspondence department and are equipped with to both ends extend and with the gib block of guide way looks adaptation, but magnet steel support's gib block lateral shifting wear to locate on the guide way of first coil former and second coil former.

5. The no-maintenance pull-in current direct current relay according to claim 1, characterized in that: the magnetic steel is neodymium iron boron magnetic steel.

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