阅读说明：本技术 磁保持继电器及其工作方法 (Magnetic latching relay and working method thereof ) 是由 任东园 任国良 朱青勇 于 2020-05-22 设计创作，主要内容包括：本发明涉及一种磁保持继电器及其工作方法,其包括壳体、电磁执行机构、动片、静片,电磁执行机构联动连接动片,并使动片的动触点与静片的静触点在导接与分离之间切换；其结构要点在于所述壳体两侧均固定设有静片,壳体内两侧静片的静触点之间设有相对于壳体呈定位摆转的动片,且动片两侧分别设有摆转到位时与两侧静片的静触点同时导接的动触点,即动片与壳体两侧静片之间形成跷板式导接。上述结构工作时,动片通过跷板式摆转的形式与静片导接,有效增大了动片与静片导接的行程,从而在磁保持继电器导通后断开时,不易产生电弧；动片摆转时对磁保持力和电磁驱动力未提出更高的要求,成本相对较低,磁保持更为可靠,使用寿命更长。(The invention relates to a magnetic latching relay and a working method thereof, wherein the magnetic latching relay comprises a shell, an electromagnetic actuating mechanism, a movable plate and a fixed plate, wherein the electromagnetic actuating mechanism is linked with the movable plate and enables a movable contact of the movable plate and a fixed contact of the fixed plate to be switched between conduction and separation; the structure is characterized in that the two sides of the shell are both fixedly provided with the static sheets, a moving sheet which is positioned and swung relative to the shell is arranged between the static contacts of the static sheets at the two sides in the shell, and the two sides of the moving sheet are respectively provided with a moving contact which is simultaneously connected with the static contacts of the static sheets at the two sides in a guiding way when the moving sheet swings to the right position, namely, a seesaw type guiding connection is formed between the moving sheet and the static sheets at the two sides of the shell. When the structure works, the movable plate is in conductive connection with the static plate in a seesaw type swing mode, so that the conductive connection stroke of the movable plate and the static plate is effectively increased, and electric arcs are not easy to generate when the magnetic latching relay is switched off after being switched on; the moving plate does not have higher requirements on magnetic holding force and electromagnetic driving force during swinging and rotating, the cost is relatively low, the magnetic holding is more reliable, and the service life is longer.)

1. A magnetic latching relay comprises a shell (1), an electromagnetic actuating mechanism, a movable piece (5) and a fixed piece (3), wherein the electromagnetic actuating mechanism is in linkage connection with the movable piece and enables a movable contact (6) of the movable piece and a fixed contact (4) of the fixed piece to be switched between conducting connection and separation; the device is characterized in that both sides of the shell (1) are fixedly provided with static sheets (3), a movable sheet (5) which is positioned and swung relative to the shell is arranged between the static contacts (4) of the static sheets at both sides in the shell, and both sides of the movable sheet are respectively provided with a movable contact (6) which is simultaneously in guide connection with the static contacts of the static sheets at both sides when the movable sheet is swung in place, namely, the movable sheet and the static sheets at both sides of the shell form seesaw type guide connection.

2. The magnetic latching relay according to claim 1, characterized in that the electromagnetic actuator comprises an electromagnetic coil assembly, a lever assembly, a push rod (15), the electromagnetic coil assembly comprises an electromagnetic coil body (10) with an iron core (11) inside, and two ends of the electromagnetic coil body are fixedly provided with symmetrical yokes (12); the control rod component comprises an insulating part (13) which is positioned and swung relative to the shell (1), the insulating part is fixedly connected with two armatures (14) which are arranged in parallel at intervals in a penetrating way, and permanent magnets which enable the two armatures to form opposite polarities are arranged in the insulating part; each armature extends out of two ends of the insulating part, a limit notch is formed between the two armatures extending out of each end, and the yoke is provided with a bending part (1201) which extends into the limit notch on the corresponding side and limits the swing stroke of the insulating part; insulating part one side integration is equipped with control rod (1301) along with the insulating part pendulum changes, the push rod slides and arranges in the spout that corresponds in the casing, and push rod pole portion is equipped with and is connected and link the gliding opening of push rod (1501) along with the control rod pendulum when changeing with the control rod end, and the push rod tip is equipped with hook portion (1503), rotor (5) are equipped with cross-under hook portion and link rotor swing lap joint mouth (501) when sliding along with the push rod.

3. The magnetic latching relay according to claim 2, characterized in that the side of the push rod (15) is provided with a manual shifting piece (1502) extending towards the outside of the housing (1), and the housing is correspondingly provided with a stroke sliding hole adapted to the manual shifting piece to slide along with the push rod.

4. The magnetic latching relay according to claim 1, characterized in that a magnetic blow plate (7) for magnetic blow-out between the stationary contact (4) side and the movable contact (6) side is provided in the housing (1), and the magnetic blow plate is fixed to the housing (1).

5. A magnetic latching relay according to claim 4, characterized in that the part of the said static sheet (3) extending into the housing (1) is U-shaped, and the magnetic blow plate (7) on the side of the said static contact (4) is fixed in the cavity of the U-shaped part.

6. A magnetic latching relay according to claim 1 or 4, characterized in that an arc extinguishing cover (8) for extinguishing arc between the moving contact and the stationary contact is arranged at one side of the housing (1) between the moving contact (6) and the stationary contact (4), and an arc extinguishing grid is arranged in the arc extinguishing cover.

7. The magnetic latching relay according to claim 1, characterized in that the middle of the moving plate (5) is positioned with a swing seat (503), the swing seat is swing positioned in the housing (1), the moving plate at one side of the swing seat is linked with the electromagnetic actuator, and the moving plate at the other side of the swing seat is provided with a circular arc protrusion part (502) protruding towards one side or two sides of the moving plate; the movable sheet (5) is formed by overlapping more than one layer of metal sheets, wherein at least one metal sheet is a metal elastic reed (506), the rest metal sheets are metal sheets with the arc convex parts, the metal sheets with the arc convex parts are distributed on one side or two sides relative to the metal elastic reed, and the arc convex parts on the same side are increased in radius from inside to outside and are provided with gaps.

8. The magnetic latching relay according to claim 7, wherein the swing seat (503) is provided with symmetrically distributed limit protrusions (504) along the radial direction of the swing, and when the swing seat swings to the movable contact of the movable plate (5) and the stationary contact (4) of the stationary plate (3) to be connected, the limit protrusions on both sides of the swing seat respectively form an abutment with the inside of the housing (1), and the direction of the abutment force when the abutment is formed is parallel to the direction of the holding force when the push rod (15) pushes the movable plate and the stationary plate to be connected in place.

9. The magnetic latching relay according to claim 7, wherein said pendulum base (503) is provided with a through hole (5031) penetrating and connecting with the moving plate (5), and the inner top surface of the through hole is provided with a bump (5032), part of the metal sheets of said moving plate are provided with a matching hole (507) matching with the bump and forming a positioning relative to the pendulum base by matching with the bump through the matching hole, and the rest of the metal sheets of the moving plate are matched with the through hole in an inserting manner and forming a locking limit by inserting a locking sheet (508) on the inner bottom surface of the through hole.

10. An operation method of the magnetic latching relay according to claim 2, characterized in that the operation method is: in the initial state, the movable contact (6) of the movable blade (5) and the fixed contact (4) of the fixed blade (3) are kept in a separated state and are not in conductive connection; when the magnetic latching relay needs to be conducted, an electromagnetic coil body (10) in the electromagnetic coil assembly is electrified, yoke irons (12) at two ends of the electromagnetic coil body respectively generate corresponding magnetism, an armature iron (14) with magnetism of the operating lever assembly and the magnetism of the yoke irons form a relative action, an insulating part (13) of the operating lever assembly drives the operating lever to swing, the operating lever swings and links with a push rod (15) to form directional sliding, and the push rod drives the moving piece to swing relative to the shell (1) until moving contacts at two sides of the moving piece are in conductive connection with static contacts of static pieces at two sides of the shell, so that the magnetic latching relay is conducted; after the electromagnetic coil is conducted, the power-on of the electromagnetic coil body is cut off, and the armature of the control rod component and the yokes at the two ends of the electromagnetic coil component are attracted and self-retained, so that the magnetic retention of the conduction state of the magnetic retention relay is realized; when the magnetic latching relay needs to be switched off, only the electromagnetic coil body of the electromagnetic coil assembly needs to be electrified reversely, the operating rod assembly and the push rod form reverse actions, and the linkage moving piece swings, rotates and resets to realize the disconnection of the magnetic latching relay; after the electromagnetic coil is disconnected, the power on of the electromagnetic coil body is cut off, the armature of the control rod assembly and the yokes at the two ends of the electromagnetic coil assembly are attracted and self-retained, and the magnetic retention of the magnetic retention relay in the disconnected state is realized.

Technical Field

The invention relates to a relay, in particular to a magnetic latching relay and a working method thereof.

Background

The magnetic latching relay is a novel relay developed in recent years and is also an automatic switch. The electromagnetic relay has the function of automatically switching on and off the circuit as other electromagnetic relays. The magnetic latching relay has the advantages that the normally closed state or the normally open state of the magnetic latching relay completely depends on the action of permanent magnetic steel, and the switching state of the magnetic latching relay is triggered by pulse electric signals with certain width to complete the switching. The utility model relates to a magnetic latching relay for control, which comprises an electromagnetic system and a contact system, wherein the electromagnetic system and the contact system are encapsulated in a box body, the electromagnetic system comprises a coil and an armature component, and the contact system comprises a stator component and a rotor component; the coil utilizes the state of electromagnetic force control armature subassembly, and armature subassembly contacts with the promotion piece subassembly, utilizes the promotion piece subassembly to transmit the state change of armature subassembly for the movable plate subassembly, and the movable contact of movable plate subassembly realizes leading with the stationary contact realization of stationary blade spare of stationary blade subassembly or separation, realizes switching on and breaking off of magnetic latching relay promptly. The above magnetic latching relay is a common type in the prior art, and the main disadvantages of the magnetic latching relay are as follows: 1. the contact stroke of the movable contact and the fixed contact of the fixed contact is often short, continuous electric arc is easy to appear when the movable contact and the fixed contact are disconnected, and a corresponding arc extinguishing structure is difficult to design. This is because the magnetic force of the magnetic latching is constant, if the rotor is designed to have a large swing stroke, a larger magnetic latching force needs to be designed to achieve the magnetic latching, and each on-off switching of the relay also needs a larger electromagnetic force to drive, which obviously increases the cost and reduces the magnetic latching reliability. 2. The current structure is difficult to increase the disconnection and conduction stroke of the movable contact and the static contact of the movable plate, and the repeated large-amplitude swing of the movable plate can cause various unpredictable hidden dangers and influence various performances and service life of the magnetic latching relay. For this reason, there is a need for improvement of the existing magnetic latching relay.

Disclosure of Invention

In order to overcome the defects, the invention aims to provide a magnetic latching relay and a working method thereof for the field, so that the technical problems of short contact stroke, easy occurrence of electric arc, unreliable use and short service life of the moving contact and the static contact of the moving plate of the conventional similar product are solved. The purpose is realized by the following technical scheme.

A magnetic latching relay comprises a shell, an electromagnetic actuating mechanism, a movable plate and a fixed plate, wherein the electromagnetic actuating mechanism is in linkage connection with the movable plate and enables a movable contact of the movable plate and a fixed contact of the fixed plate to be switched between conduction and separation; the structure is characterized in that the two sides of the shell are both fixedly provided with the static sheets, a moving sheet which is positioned and swung relative to the shell is arranged between the static contacts of the static sheets at the two sides in the shell, and the two sides of the moving sheet are respectively provided with a moving contact which is simultaneously connected with the static contacts of the static sheets at the two sides in a guiding way when the moving sheet swings to the right position, namely, a seesaw type guiding connection is formed between the moving sheet and the static sheets at the two sides of the shell. Through the structure, the mode of the movable plate and the static plate in a guide connection mode is changed into the mode of the movable plate seesaw type swing rotation, the structure effectively increases the guide connection stroke of the movable plate and the static plate, and therefore when the magnetic latching relay is switched off after being switched on, electric arcs are not easy to generate, and the corresponding arc extinguishing structure is conveniently designed. And the movable plate does not increase elastic deformation compared with the existing structure when swinging and rotating, so that higher requirements on magnetic holding force and electromagnetic driving force do not need to be provided, the cost is relatively low, the magnetic holding is more reliable, and the service life is longer.

The electromagnetic actuating mechanism comprises an electromagnetic coil assembly, a control rod assembly and a push rod, wherein the electromagnetic coil assembly comprises an electromagnetic coil body with an iron core inside, and two symmetrical yokes are fixedly arranged at two ends of the electromagnetic coil body; the operating rod assembly comprises an insulating part which is positioned and swung relative to the shell, the insulating part is fixedly connected with two parallel armatures which are arranged at intervals in a penetrating way, and a permanent magnet which enables the two armatures to form opposite polarities is arranged in the insulating part; each armature extends out of two ends of the insulating part, a limit notch is formed between the two armatures extending out of each end, and the yoke iron is provided with a bending part which extends into the limit notch on the corresponding side and limits the swing stroke of the insulating part; the integrated control rod that is equipped with along with the insulating part pendulum changes in insulating part one side, the push rod slides and arranges in the spout that corresponds in the casing, and push rod pole portion is equipped with and is connected with the control rod end and links the gliding opening of push rod when the control rod pendulum changes, and the push rod tip is equipped with the portion of colluding, the rotor is equipped with cross-under portion of colluding and links the overlap joint mouth that the rotor swung when the push rod slides. The electromagnetic coil assembly, the control rod assembly and the push rod are structurally and connected, so that linkage is reliable.

The side surface of the push rod is provided with a manual shifting piece extending towards the outer side of the shell, and the shell is correspondingly provided with a stroke sliding hole matched with the manual shifting piece to slide along with the push rod. With this structure, the manual on and off operation of the magnetic latching relay is realized.

And magnetic blow-out plates for magnetic blow-out arc extinction between the fixed contact side and the movable contact side are arranged in the shell, and the magnetic blow-out plates are fixed on the shell. Through this structure, the arc extinguishing between the moving contact of the moving blade and the stationary blade stationary contact is accelerated.

The part of the static sheet extending into the shell is U-shaped, and the magnetic blow plate on the side of the static contact is fixed in the inner cavity of the U-shaped part. The structure has reasonable spatial layout and effectively reduced volume.

And an arc extinguishing cover for extinguishing arc between the movable contact and the fixed contact is arranged on one side of the shell between the movable contact and the fixed contact, and an arc extinguishing grid is arranged in the arc extinguishing cover. Through this structure, further improve the arc extinguishing effect between movable contact of contact and the stationary blade stationary contact.

A swinging seat is positioned in the middle of the moving plate, the swinging seat is positioned in the shell in a swinging manner, the moving plate on one side of the swinging seat is in linkage connection with the electromagnetic actuating mechanism, and the moving plate on the other side of the swinging seat is provided with an arc-shaped convex part which is convex towards one side or two sides of the moving plate; the moving plate 5 is formed by overlapping more than one layer of metal sheets, wherein at least one metal sheet is a metal elastic reed, the rest metal sheets are metal sheets with arc-shaped convex parts, the metal sheets with the arc-shaped convex parts are distributed on one side or two sides relative to the metal elastic reed, and the arc-shaped convex parts on the same side are in radius increasing from inside to outside and are provided with gaps. The arc convex part is arranged on the moving piece, so that the moving piece generates elastic deformation after being pushed by the push rod, the moving piece and the static piece are more reliably connected in a guiding way, and the problem of poor contact of the contact is effectively prevented.

The swing seat is provided with limiting lugs which are symmetrically distributed along the radial direction of the swing seat, when the swing seat swings to the movable contact of the movable piece and the static contact of the static piece in a guide connection mode, the limiting lugs on the two sides of the swing seat respectively abut against the inside of the shell, and the abutting force direction when abutting against is parallel to the retaining force direction when the push rod pushes the movable piece and the static piece to be in guide connection in place. Through the structure, the fact that the force for keeping the movable piece by the push rod is large is mainly considered, and after the movable piece is connected with the fixed piece in a guiding mode, under the condition of large-current work, the swing seat is prone to deformation and deflection due to reasons such as heating of the movable piece, once the movable piece is prone to being deformed, the position of the movable piece is unreliable, and therefore the limiting convex block is designed.

The pendulum swivel mount is equipped with the perforation of cross-under rotor, and perforates the interior top surface and be equipped with the lug, part sheetmetal in the rotor be equipped with lug complex mating holes to form the location for the pendulum swivel mount through mating holes and lug cooperation, all the other sheetmetals in the rotor and perforation grafting cooperation, and it is spacing to form the locking through the interior bottom surface grafting locking plate of perforation. Through the structure, when the movable piece and the movable contact are abutted against the fixed contact of the fixed piece, part of the metal pieces in the movable piece can form tiny offset action relative to the through hole of the pendulum seat, so that the movable piece has certain deformation elasticity integrally, and the reliability of the joint of the movable contact and the fixed contact of the fixed piece is improved.

The working method of the magnetic latching relay comprises the following steps: in an initial state, the movable contact of the movable blade and the fixed contact of the fixed blade are kept in a separated state and are not in conductive connection; when the magnetic latching relay needs to be switched on, an electromagnetic coil body in the electromagnetic coil assembly is electrified, yoke irons at two ends of the electromagnetic coil body respectively generate corresponding magnetism, an armature iron with magnetism of the operating rod assembly and the magnetism of the yoke irons form a relative action, an insulating part of the operating rod assembly drives the operating rod to swing, the operating rod swings and links the push rod to form directional sliding, and the push rod drives the moving piece to swing and rotate relative to the shell until moving contacts at two sides of the moving piece are in conductive connection with static contacts of static pieces at two sides of the shell, so that the magnetic latching relay is switched on; after the electromagnetic coil is conducted, the power-on of the electromagnetic coil body is cut off, and the armature of the control rod component and the yokes at the two ends of the electromagnetic coil component are attracted and self-retained, so that the magnetic retention of the conduction state of the magnetic retention relay is realized; when the magnetic latching relay needs to be switched off, only the electromagnetic coil body of the electromagnetic coil assembly needs to be electrified reversely, the operating rod assembly and the push rod form reverse actions, and the linkage moving piece swings, rotates and resets to realize the disconnection of the magnetic latching relay; after the electromagnetic coil is disconnected, the power on of the electromagnetic coil body is cut off, the armature of the control rod assembly and the yokes at the two ends of the electromagnetic coil assembly are attracted and self-retained, and the magnetic retention of the magnetic retention relay in the disconnected state is realized.

The magnetic latching relay has a simpler overall structure, effectively increases the connecting stroke of the moving plate and the static plate on the basis of not changing the electromagnetic driving and magnetic latching structure of the existing magnetic latching relay, thereby effectively reducing the influence of electric arc when the moving plate and the static plate are disconnected, ensuring the use safety and reliability, prolonging the service life, and being suitable for being used as the magnetic latching relay or improving the structure of the like.

Drawings

FIG. 1 is a schematic diagram of the internal structure of the present invention in the non-conducting state.

Fig. 2 is a schematic diagram of the internal structure of the present invention in the on state.

Fig. 3 is a schematic perspective view of the present invention, and a part of the structure is omitted.

Fig. 4 is a schematic view of the rotor of the present invention.

Fig. 5 is a schematic view of the explosion structure of the connection between the rotor and the swing seat.

Fig. 6 is a first structural schematic diagram of the swinging state of the moving plate swinging seat of the present invention.

Fig. 7 is a second structural diagram illustrating a swinging state of the rotor swing seat according to the present invention.

The sequence numbers and names in the figure are: 1. the electromagnetic switch comprises a shell, 2, a cover plate, 3, a fixed sheet, 4, a fixed contact, 5, a movable sheet, 501, a lap joint, 502, an arc-shaped convex part, 503, a swing rotary seat, 5031, a perforation, 5032, a lug, 504, a limiting lug, 505, a rotating shaft, 506, a metal elastic reed, 507 a matching hole, 508, a locking sheet, 6, a movable contact, 7, a magnetic blow plate, 8, an arc extinguishing cover, 9, a bracket, 10, an electromagnetic coil body, 11, an iron core, 12, a yoke, 1201, a bending part, 13, an insulating piece, 1301, a control lever, 14, an armature, 15, a push rod, 1501, an opening, 1502, a manual shifting sheet, 1503 and a hook part.

Detailed Description

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

As shown in fig. 1 to 4, the magnetic latching relay includes a housing 1, a cover plate 2, an electromagnetic actuator, a moving plate 5, and a fixed plate 3, and the specific structure is as follows: both sides of the shell are fixedly provided with the static sheets, the parts of the static sheets extending into the shell are U-shaped, and one side of the U-shaped is provided with the static contact. A movable piece which is positioned and swung relative to the shell is arranged between the static contacts 4 of the static pieces at the two sides in the shell, and the two sides of the movable piece are respectively provided with a movable contact 6 which is simultaneously in conductive connection with the static contacts of the static pieces at the two sides when the movable piece is swung in place, namely the movable piece and the static pieces at the two sides of the shell form a seesaw type conductive connection. The middle part of the moving plate is provided with a swinging seat 503 which is positioned and swung with the shell through a positioning piece, and the swinging seat is integrated with a rotating shaft 505 and is positioned in the shell through the rotation of the rotating shaft.

The electromagnetic actuating mechanism comprises an electromagnetic coil assembly, a control rod assembly and a push rod 15, wherein the electromagnetic coil assembly comprises an electromagnetic coil body 10 with an iron core 11 arranged inside, and two symmetrical yokes 12 are fixedly arranged at two ends of the electromagnetic coil body. The operating rod component comprises an insulating part 13 which is positioned and swung relative to the shell, two parallel armatures 14 which are fixedly connected in a penetrating way and arranged at intervals are integrally molded in the insulating part, and permanent magnets which enable the two armatures to form opposite polarities are arranged in the insulating part in an injection molding mode. Each armature stretches out of two ends of the insulating part, a limiting notch is formed between the two armatures stretching out of each end, and the yoke iron is provided with a bending part 1201 stretching into the limiting notch on the corresponding side and limiting the swinging stroke of the insulating part. An operating rod 1301 swinging along with the insulating part is integrally arranged on one side of the insulating part, the push rod slides and is arranged in a corresponding sliding groove in the shell 1, an opening 1501 connected with the end of the operating rod and used for linking the push rod to slide along with the operating rod is arranged on the rod part of the push rod, a hook part 1503 is arranged on the end part of the push rod, and a lap joint opening 501 which is connected with the hook part in a crossing manner and used for linking the moving piece to swing along with the push rod when the moving piece on one side of the swing seat 503. The moving plate on the other side of the swinging seat is provided with an arc convex part 502 which is convex towards one side or two sides of the moving plate 5 (convex at two sides in the figure); the moving plate is formed by overlapping more than one layer of metal sheets, wherein at least one metal sheet is a metal elastic spring leaf 506, the rest metal sheets are metal sheets with the arc convex parts, the metal sheets with the arc convex parts are distributed on one side or two sides relative to the metal elastic spring leaf, and the arc convex parts on the same side are in radius increasing from inside to outside and are provided with gaps. The connection structure between each metal sheet and the swinging seat is as follows: as shown in fig. 5, the swing seat is provided with a through hole 5031 penetrating and connecting the moving plate, and the inner top surface of the through hole is provided with a bump 5032, part of the metal sheets in the moving plate are provided with a matching hole 507 matching with the bump, and are matched with the bump through the matching hole to form a positioning relative to the swing seat, and the rest of the metal sheets in the moving plate are in inserting fit with the through hole and form a locking limit through an inserting locking sheet 508 on the inner bottom surface of the through hole.

Furthermore, in order to facilitate the manual operation of the push rod 15, a manual shifting piece 1502 extending out of the housing is disposed on the side surface of the push rod, and a stroke sliding hole adapted to the manual shifting piece to slide along with the push rod is correspondingly disposed on the housing 1.

In order to effectively reduce the electric arc influence when the movable contact 6 of the movable contact 5 is separated from the fixed contact 4 of the fixed contact 3, magnetic blow-out plates 7 for magnetic blow-out arc between the movable contact and the fixed contact are arranged on the fixed contact side and the movable contact side in the shell 1, and the magnetic blow-out plates are fixed on the shell. The magnetic blow-down plate on the side of the static contact is positioned in the U-shaped part of the static sheet so as to achieve reasonable spatial layout. An arc extinguishing cover 8 for extinguishing arc between the movable contact and the fixed contact is further arranged on one side of the shell between the movable contact and the fixed contact, and an arc extinguishing grid is arranged in the arc extinguishing cover.

As shown in fig. 4-7, in order to consider that when the moving plate 5 is in contact with the static plate 3 for a long time, the force of the push rod 15 against and holding the moving plate is large, and the temperature of the moving plate and the static plate after contact is increased, so that the moving plate and the swinging seat 503 are easily deformed or displaced due to the influence of stress and temperature, and the swinging of the moving plate is unreliable. Therefore, the swing seat can also be provided with the limit bumps 504 which are symmetrically distributed along the radial direction of the swing seat, when the swing seat swings to the movable contact 6 of the movable piece and the fixed contact 4 of the fixed piece to be in conductive connection, the limit bumps on the two sides of the swing seat respectively form a butting with the inside of the shell 1, and the butting force direction when the butting force is butted is parallel to the holding force direction when the push rod pushes the movable piece and the fixed piece to be in conductive connection in place, so that the working reliability of the swing seat and the movable piece is improved, and the deformation failure is effectively prevented.

The swing seat 503 and the housing 1 can also be indirectly positioned by the bracket 9, that is, the housing is provided with an embedding slot for embedding and positioning the bracket, the bracket is a clamping plate with a U-shaped cross section, and the rotating shaft 505 of the swing seat and the two side plate surfaces of the U-shaped bracket are rotatably positioned. During the installation, only need break off the U-shaped mouth of support with the fingers and thumb to swing the pivot of swivel mount and support both sides location fit, again with the caulking groove of support embedding casing in, at last with casing and 2 lock joints of its apron, support and rotor are effectively positioned in the casing promptly, and it is comparatively convenient to assemble.

The working method of the invention is as follows: in the initial state, the movable contact 6 of the movable blade 5 and the fixed contact 4 of the fixed blade 3 are kept in a separated state and are not in conductive connection; when the magnetic latching relay needs to be conducted, an electromagnetic coil body 20 in an electromagnetic coil assembly is electrified, yoke irons 23 at two ends of the electromagnetic coil body respectively generate corresponding magnetism, an armature 14 with magnetism of an operating rod assembly and the magnetism of the yoke irons form a relative action, an insulating piece 13 of the operating rod assembly drives an operating rod 1301 to swing, the operating rod swings and links a push rod 15 to form directional sliding, the push rod drives a moving piece to swing relative to a shell 1 until moving contacts at two sides of the moving piece are in conductive connection with static contacts of static pieces at two sides of the shell, and the conduction of the magnetic latching relay is achieved. After the electromagnetic coil is conducted, the power-on of the electromagnetic coil body is cut off, and the armature of the control rod component and the yokes at the two ends of the electromagnetic coil component are attracted and self-retained, namely the magnetic retention of the conduction state of the magnetic retention relay is realized. When the magnetic latching relay needs to be switched off, only the electromagnetic coil body of the electromagnetic coil assembly needs to be electrified reversely, the operating rod assembly and the push rod form reverse actions, and the linkage moving piece swings and resets to realize the disconnection of the magnetic latching relay. After the electromagnetic coil is disconnected, the power on of the electromagnetic coil body is cut off, the armature of the control rod assembly and the yokes at the two ends of the electromagnetic coil assembly are attracted and self-retained, and the magnetic retention of the magnetic retention relay in the disconnected state is realized.

The above description is intended to illustrate the technical means of the present invention, and not to limit the technical scope of the present invention. Obvious modifications or alterations to the present invention in combination with the prior art knowledge will be apparent to those skilled in the art and fall within the scope of the appended claims.