CN115799000A - Electromagnetic relay - Google Patents

Abstract

The invention discloses an electromagnetic relay, which comprises a base, a contact system and a magnetic circuit system, wherein the contact system comprises at least one group of movable spring parts and a plurality of groups of static spring parts, each movable spring part comprises a movable spring piece and a plurality of movable contacts, and two ends of each movable spring piece are respectively provided with at least one movable contact; each group of static spring parts respectively comprises a static spring piece and at least one static contact arranged on the static spring piece, and the movable contact is matched with the static contact; the movable spring plate is fixedly connected to a fixing piece at a position between two ends of the movable spring plate, and the movable spring plate forms a first elastic arm and a second elastic arm which are positioned at two sides of the position; the magnetic circuit system drives the first elastic arm through the first pushing piece and drives the second elastic arm through the second pushing piece. The invention can prevent the movable and static contacts at the two ends of the movable reed from being adhered, thereby reducing the influence of the adhesion of one group of contacts on the other group of contacts and further improving the adhesion resistance of the invention.

Description

Electromagnetic relay

Technical Field

The invention relates to the technical field of relays, in particular to an electromagnetic relay.

Background

An electromagnetic relay is an electronic control device, which is usually applied in an automatic control circuit, and it is actually an "automatic switch" that uses a small current to control a large current, so that it plays the roles of automatic regulation, safety protection, circuit switching, etc. in the circuit.

In the electromagnetic relay in the prior art, a contact system of the electromagnetic relay forms two groups of contacts, the two groups of contacts form a series connection form through a movable reed, specifically, the movable contacts of the two groups of contacts are respectively fixed at two ends of the movable reed, and the movable reed is formed together with an armature insert of a magnetic circuit system through a plastic part in an injection molding mode, so that the armature drives the movable reed to act. The two groups of contacts are synchronous and are closed or opened simultaneously, when one group of contacts is stuck due to arc burning, the other group of contacts cannot be opened or slightly opened due to the fusion and sticking of the contacts, so that the conductive circuit is poor in contact and poor in adhesion resistance.

Disclosure of Invention

The invention provides an electromagnetic relay aiming at the technical problems in the prior art, which improves the installation form of a movable spring and adopts two pushing pieces to respectively push, so that whether two groups of contacts formed at two ends of the movable spring are adhered or not can not be mutually influenced.

The technical scheme adopted by the invention for solving the technical problems is as follows: an electromagnetic relay comprises a base, a contact system and a magnetic circuit system, wherein the contact system comprises at least one group of movable spring parts and a plurality of groups of static spring parts, each movable spring part comprises a movable spring piece and a plurality of movable contacts, and two ends of each movable spring piece are respectively provided with at least one movable contact; each group of static spring parts respectively comprise a static spring piece arranged on the base and at least one static contact arranged on the static spring piece, and the movable contact is matched with the static contact; the movable spring plate is fixedly connected with at least one fixing piece at a position between two ends of the movable spring plate, and the movable spring plate forms a first elastic arm and a second elastic arm which are positioned at two sides of the position; the magnetic circuit system drives the first elastic arm through the first pushing piece, and drives the second elastic arm through the second pushing piece.

Further, the magnetic circuit system comprises two mutually independent magnetic circuit portions, wherein the armature of one magnetic circuit portion drives the first elastic arm through the first pushing piece, and the armature of the other magnetic circuit portion drives the second elastic arm through the second pushing piece; or the magnetic circuit system comprises a magnetic circuit part, and the armature of the magnetic circuit part drives the first elastic arm and the second elastic arm of the movable spring respectively through the first pushing piece and the second pushing piece.

Further, the first pushing member and the second pushing member are movably mounted on the base, respectively, or the first pushing member and the second pushing member are mounted on an armature of the magnetic circuit portion, respectively.

Furthermore, the magnetic circuit part comprises a coil rack, a coil wound on the coil rack, an iron core inserted in the coil rack, a yoke iron and an armature iron, wherein the yoke iron is positioned outside the coil rack and is in contact connection with one end of the iron core or is integrally formed, and the armature iron is arranged at a knife edge of the yoke iron in a swinging manner and is matched with the other end of the iron core.

Furthermore, the yoke is L-shaped, one side of the yoke is in contact connection with one end of the iron core or is integrally formed, and the other side of the yoke is provided with the knife edge; the armature iron is L-shaped, one side of the armature iron is matched with the other end of the iron core, and the other side of the armature iron is matched at the outer side of the other side of the yoke iron to form a driving part; the other side of the armature iron is in clearance fit with the other side of the yoke iron or is matched with a magnetic isolation piece which is fixedly connected with the yoke iron or the armature iron, or the magnetic isolation piece is fixedly connected with the base or integrally formed on the base; and a restoring spring for restoring the armature is matched between the armature and the yoke iron.

Further, the first pushing piece is made of an insulating material, or the part of the first pushing piece, which is used for being in contact with the movable reed, is made of an insulating material; the second pushing piece is made of an insulating material, or the part of the second pushing piece, which is used for being in contact with the movable reed, is made of an insulating material; the first pushing piece and the second pushing piece are respectively of a columnar structure.

Furthermore, a plurality of movable contacts are respectively arranged at two ends of the movable spring piece and are distributed along the width direction of the movable spring piece; the number of the static spring parts is two, the static springs of the two groups of static spring parts are respectively provided with a plurality of static contacts, and the plurality of static contacts of the two groups of static spring parts are respectively matched with the plurality of movable contacts at the two ends of the movable spring in a one-to-one correspondence manner.

Furthermore, the number of the movable reeds is one, or the number of the movable reeds is multiple, and multiple movable reeds are overlapped together; the designated part is the middle part of the movable reed.

Further, the fixing member is integrally formed with the base, or the fixing member is fixedly connected to the base; the fixing piece is shaped like a Chinese character 'ji' or inverted Chinese character 'ji'.

Furthermore, the base is provided with a first cavity and a second cavity, the magnetic circuit system is arranged in the first cavity, and the contact system is arranged in the second cavity; the first cavity is wholly or partially positioned above the second cavity.

Compared with the prior art, the invention has the following beneficial effects:

1. the movable spring is fixedly connected with a fixed piece at one part between the two ends of the movable spring, so that the movable spring forms a first elastic arm and a second elastic arm, and the first elastic arm and the second elastic arm are separately driven by a magnetic circuit system through a first pushing piece and a second pushing piece, so that whether movable contacts and static contacts at the two ends of the movable spring are adhered or not cannot be influenced mutually, the influence of adhesion of one group of contacts on the other group of contacts is reduced, and the adhesion resistance of the invention is improved.

2. When the magnetic circuit system adopts two mutually independent magnetic circuit parts, the actions of the first pushing piece and the second pushing piece are mutually independent and cannot influence each other, so that the invention can be applied to special occasions.

3. The movable contact spring is characterized in that a plurality of movable contacts are respectively arranged at two ends of the movable contact spring, and at least two groups of contacts are respectively formed at two ends of the movable contact spring in a parallel connection mode, so that the contact resistance of a product is effectively reduced, the temperature rise of the product is reduced, and the reliability of the product is effectively improved.

4. The contact system and the magnetic circuit system are arranged in the base in a cavity mode, and therefore the insulating performance of the contact system and the magnetic circuit system is greatly improved.

The invention is further explained in detail with the accompanying drawings and the embodiments; an electromagnetic relay of the present invention is not limited to the embodiment.

Drawings

FIG. 1 is an exploded view of the present invention (without the housing) according to one embodiment;

FIG. 2 is a schematic perspective view of a contact system according to the present invention (including a first urging member, a second urging member, etc.);

FIG. 3 is a front view of the invention (without the housing) according to one embodiment;

FIG. 4 isbase:Sub>A sectional view A-A of FIG. 3 according to an embodiment;

FIG. 5 is a schematic perspective view of a contact system of the present invention according to a second embodiment (including a first urging member, a second urging member, etc.);

FIG. 6 is an exploded view of the third embodiment of the present invention;

FIG. 7 is a front view of a contact system of the present invention (including a first pusher, a second pusher, etc.) according to a third embodiment;

FIG. 8 is a front view of the invention of the third embodiment (without the housing);

FIG. 9 is the second front view of the third embodiment of the present invention (with a housing)

FIG. 10 is a sectional view taken along line B-B of FIG. 9 according to the third embodiment;

FIG. 11 is a schematic perspective view of a contact system of the present invention (including a first urging member, etc.) according to a fourth embodiment;

FIG. 12 is a schematic perspective view of a contact system of the present invention (including a first urging member, etc.);

FIG. 13 is a schematic perspective view of a contact system of the present invention according to a sixth embodiment (including a first urging member, etc.);

in the figure, 1, a movable spring part, 11, a movable spring piece, 111, a first elastic arm, 112, a second elastic arm, 12, a movable contact, 13, a flexible conductive piece, 2, a static spring part, 21, a static spring piece, 22, a static contact, 3, a monitoring component, 31, a monitoring movable spring piece, 32, a monitoring movable contact, 33, a monitoring static spring piece, 331, a monitoring leading pin, 34, a monitoring static contact, 4, a base, 41, a first cavity, 42, a second cavity, 43, a partition board, 5, a magnetic circuit part, 51, a coil rack, 52, a coil, 53, an iron core, 54, an armature, 55, a yoke, 56, a restoring spring piece, 6, a first pushing piece, 7, a second pushing piece, 8, a fixing piece, 9, a magnetic partition piece, 10, a shell, 20 and a rubber blocking piece.

Detailed Description

The terms "first," "second," and the like, herein are used solely to distinguish one from another and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. In the description, the directions or positional relationships indicated by "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the scope of the present invention. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In addition, in the description of the present application, "a plurality" means two or more in number and "at least one" means one or more in number, unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

Example one

Referring to fig. 1-4, an electromagnetic relay according to the present invention includes a base 4, a housing (as shown in fig. 7) contact system and a magnetic circuit system, where the contact system includes at least one movable spring part 1 and multiple stationary spring parts 2, the movable spring part 1 includes a movable spring piece 11 and multiple movable contacts 12, and two ends of the movable spring piece 11 are respectively provided with at least one movable contact 12; each group of the static spring parts 2 respectively comprises a static spring piece 21 arranged on the base 4 and at least one static contact 22 arranged on the static spring piece 21, and the movable contacts 12 are matched with the static contacts 22 in a one-to-one correspondence manner. The movable spring plate 11 is fixedly connected with a fixing part 8 at a position between two ends of the movable spring plate, and the movable spring plate 11 forms a first elastic arm 111 and a second elastic arm 112 which are positioned at two sides of the position; the magnetic circuit further comprises a first pushing member 6 and a second pushing member 7, the magnetic circuit system drives the first elastic arm 111 through the first pushing member 6, and the magnetic circuit system drives the second elastic arm 112 through the second pushing member 7. The location is preferably the middle of the movable spring plate 11, so that the first elastic arm 111 and the second elastic arm 112 of the movable spring plate 11 are symmetrical or substantially symmetrical to each other. The movable spring plate 11 is of a single-piece structure, and the movable spring plate 11 is preferably made of copper or copper alloy material and has good electric conductivity and elastic deformation capability. The number of the movable spring parts 1 is one group, the number of the static spring parts 2 is two groups, and the two groups of the static spring parts 2 are respectively positioned at two ends of the movable spring leaf 11. The two ends of the movable spring plate 11 refer to two ends in the length direction of the movable spring plate 11.

In this embodiment, the magnetic circuit system comprises two mutually independent magnetic circuit portions 5, wherein one magnetic circuit portion 5 drives the first elastic arm 111 through the first pusher 6, and the other magnetic circuit portion 5 drives the second elastic arm 112 through the second pusher 7. The two magnetic circuit portions 5 are arranged in parallel, and each magnetic circuit portion 5 is horizontal. In other embodiments, the magnetic circuit system includes only one magnetic circuit portion, and the armature of the magnetic circuit portion drives the first elastic arm and the second elastic arm through the first pushing member and the second pushing member, respectively, in this case, the first pushing member and the second pushing member may be independent of each other, or may be fixedly connected or integrally formed.

In this embodiment, the magnetic circuit portion 5 includes a coil frame 51, a coil 52 wound around the coil frame 51, an iron core 53 inserted into the coil frame 51, a yoke 55 and an armature 54, the yoke 55 is located outside the coil frame 51 and is in contact connection with or integrally formed with one end of the iron core 53, the armature 54 is swingably disposed at a notch of the yoke 55 and is engaged with the other end of the iron core 53, and a restoring spring 56 for restoring the armature 54 is engaged between the armature 54 and the yoke 55. Specifically, the yoke 55 is L-shaped, one side of which is in contact connection with one end of the iron core 53 or is integrally formed, and the other side of which is located outside the coil frame 51 and provided with the knife edge; the armature 54 is L-shaped, and one side thereof is engaged with the other end of the iron core 53, and the other side thereof constitutes a driving portion for applying force to the first urging member 6 and/or the second urging member 7. The other side of the armature 54 is clearance fitted with the other side of the yoke 55 or fitted with a magnetic shielding member which separates the other side of the yoke 55 from the other side of the armature 54 to prevent direct contact therebetween. The magnetic isolation member is fixedly connected to the yoke 55 or the armature 54, or is fixedly connected to or integrally formed with the base 4, and specifically, is a horizontal partition plate 43 integrally formed with the base, as shown in fig. 4. The first and second pushing members 6 and 7 are respectively movably mounted on the base 4 and are respectively located at positions suitable for being pushed by the corresponding armature 54 of the magnetic circuit portion 5. In other embodiments, the first and second urging members are each mounted to an armature of a respective magnetic circuit portion.

In this embodiment, the first pushing member 6 is made of an insulating material, or the first pushing member 6 is partially insulated, and particularly, a portion of the first pushing member 6, which is used for contacting the movable spring 11 and/or the armature 54, is made of an insulating material. The second pushing member 7 is made of an insulating material, or the second pushing member 7 is partially insulated, and particularly, a portion of the second pushing member 7, which is used for contacting with the movable spring 11 and/or the armature 54, is made of an insulating material. The first pushing member 6 and the second pushing member 7 are respectively of a cylindrical structure, but are not limited thereto.

In this embodiment, two ends of the movable contact spring 11 are respectively provided with a plurality of movable contacts 12, and the movable contacts 12 are arranged along the width direction of the movable contact spring 11. The stationary spring pieces 21 of each set of the stationary spring portions 2 are provided with a plurality of stationary contacts 22, respectively. Therefore, at least two groups of contacts are connected in parallel at two ends of the movable reed 11 respectively, so that the contact resistance of a product is effectively reduced, the temperature rise of the product is further reduced, and the reliability of the product is effectively improved. For example, when a single movable contact is provided at each end of the movable spring piece, assuming that the loop current is I, the current per contact is I, and the contact resistance of the left contact group and the right contact is R, the heat generation power at the contact portion is:

P＝I ² R+I ² R

when a parallel structure of double contacts (i.e. two movable contacts 12 are respectively arranged at two ends of the movable reed 11) is adopted, the current of each contact is I/2, and the heating power of the whole loop contact group is as follows:

namely: p' = I ² And R, the integral heating is one half of that of the structure without adopting a multi-loop parallel connection structure.

In this embodiment, the base 4 is provided with a first cavity 41 and a second cavity 42, the magnetic circuit system is installed in the first cavity 41, and the contact system is installed in the second cavity 42; the first cavity 41 and the second cavity 42 are distributed up and down, and the first cavity 41 is located up and the second cavity 42 is located down. Specifically, the magnetic circuit system is mounted on the first cavity 41 from top to bottom, and the first cavity 41 is divided into two small cavities by a partition wall, and the two small cavities are respectively used for mounting the two magnetic circuit portions 5. The contact system is laterally installed in the second cavity 42, and the leading-out pin of the static reed 21 is positioned below the base 4.

In this embodiment, the fixing element 8 is integrally formed on the base 4 or fixedly connected to the base 4, specifically, the fixing element 8 is fixedly connected to the lower cavity wall of the second cavity 42, and the fixing element 8 is substantially shaped like a Chinese character ji. The first cavity 41 and the second cavity 42 are isolated from each other, a common wall body between the first cavity 41 and the second cavity 42 is only provided with two vertically-through insertion holes, the first pushing member 6 and the second pushing member 7 are respectively movably inserted into the two insertion holes, the upper ends of the first pushing member 6 and the second pushing member 7 are positioned in the first cavity 41 and are provided with a circle of outer flanges, and the lower ends of the first pushing member 6 and the second pushing member 7 are positioned in the second cavity 42 and are respectively matched with positions of a first elastic arm 111 and a second elastic arm 112 which are suitable for pushing the movable spring plate 11. The pushing points of the first pushing piece 6 and the second pushing piece 7 can be adjusted according to the requirement of contact pressure, the closer the pushing point is to the contact group, the greater the pressure of the contact is under the same condition, and the realization is simple.

In this embodiment, the contact system of the present invention further includes a monitoring component 3, where the monitoring component 3 includes a monitoring movable spring part and a monitoring stationary spring part, the monitoring movable spring part includes a monitoring movable spring 31 and a monitoring movable contact 32 disposed on the monitoring movable spring 31, the monitoring stationary spring part includes a monitoring stationary spring 33 mounted on the base 4 and a monitoring stationary contact 34 disposed on the monitoring stationary spring 33, and the monitoring movable contact 32 is matched with the monitoring stationary contact 34; the monitoring movable reed 31 is electrically connected with or integrally formed with the movable reed 11, so that the monitoring movable reed part follows the active reed 11 to be in contact with or separated from the monitoring static reed part. The monitoring movable spring piece 31 and/or the monitoring static spring piece 33 have deformation capacity so as to ensure that the monitoring movable spring part and the detection static spring part are closed in place.

In this embodiment, the number of the monitoring assemblies 3 is two, the first elastic arm 111 and the second elastic arm 112 of the movable spring 11 are respectively electrically connected to or integrally formed with the monitoring movable spring 31, and the electrical connection manner is riveting, but not limited thereto. A portion of the monitoring movable spring 31 where the monitoring movable contact 32 is provided extends outward from one side in the width direction of the movable spring 11. Therefore, the monitoring component 3 of the present invention constitutes a following type monitoring contact group, which is arranged on the strong current side, and together with the main circuit, only one monitoring pin 331 (i.e. the pin of the monitoring static reed) is used for testing each group of contacts, and insulation and isolation are not required to be formed in a physical isolation manner, so that the structure is greatly simplified. Therefore, the present invention can realize the potential monitoring of the single monitoring pin 331 and the safety monitoring of the main contact circuit, thereby performing safe and reliable circuit control and operation according to the potential condition of the monitoring pin 331.

An electromagnetic relay of the present invention is embodied as a normally open type relay, but is not limited thereto, and in other embodiments, it is a normally closed type or a transfer type relay. A movable spring part 1 and a static spring part 2 form a bridge contact structure, the left side and the right side of the bridge contact structure are respectively pushed by a pushing piece (namely a first pushing piece 6/a second pushing piece 7), and the two pushing pieces can be directly driven by one magnetic circuit part or separately driven by the two magnetic circuit parts. When a force is applied to the pushing member, the pushing member pushes the first elastic arm 111/the second elastic arm 112 of the movable contact spring on each side to move, so that the movable contact 12 and the fixed contact 22 on each side are closed, and simultaneously, the monitoring movable contact spring 31 is driven to move, and the monitoring movable contact 32 and the monitoring fixed contact 34 are closed. When the movable contact 12 and the fixed contact 22 on both sides are closed, the circuit is conducted, and in the conducting state, the load current forms a conducting main loop through the fixed spring piece 21 on one side, the fixed contact 22, the movable contact 12, the movable spring piece 11, the movable contact 12 on the other side, the fixed contact 22 and the fixed spring piece 21. When the main circuit contact and the monitoring contact are closed, the electric potential of the lead-out pin 331 is monitored to be consistent with that of the main circuit, and then the contact state of the main circuit contact is monitored; when the product is de-excited, the movable reed 11 restores deformation, the main circuit contact is disconnected, and meanwhile, the monitoring movable reed 31 also restores along with the restoration of the movable reed 11 in the process that the movable reed 11 restores deformation, so that the monitoring contact is disconnected, and the monitoring leading-out pin 331 is in a suspended state.

According to the electromagnetic relay, the movable spring part 1 and the static spring part 2 form a bridge type contact structure, so that whether the movable contact 12 and the static contact 22 at two ends of the movable spring piece 11 are adhered or not cannot be influenced mutually, and the influence of adhesion of one group of contacts on the other group of contacts is reduced. The invention enables the monitoring movable reed 31 to be electrically connected with or integrally formed on the movable reed 11, so that the monitoring component 3 of the invention forms a following type monitoring contact group which is arranged on the strong electricity side, and together with a main loop, only one monitoring contact leading-out pin is used for testing each group of contacts, and the insulation and isolation are not required to be formed in a physical isolation mode, thereby greatly simplifying the structure. In order to realize the weak electric isolation of the strong electricity of the main loop and the monitoring loop, the invention can connect a large resistor in series in the loop of the monitoring static spring part to the ground or to N (namely zero line), so that the load current basically flows through the main loop when the contact is closed.

An electromagnetic relay of the present invention, when the coils of its two magnetic circuit portions 5 are normally energized: when the main circuit left side contact group, the left monitoring contact group, the main circuit right side contact group and the right monitoring contact group are closed, the potential of the left monitoring contact pin is the same as that of the power generation side (under the condition of neglecting contact resistance of the contacts). The left side contact group/right side contact group refers to a contact group consisting of the movable contact 12 and the fixed contact 22 which are correspondingly matched with each other on the corresponding sides. The left monitoring contact group/the right monitoring contact group refers to a contact group consisting of a monitoring movable contact 32 and a monitoring fixed contact 34 which are correspondingly matched with each other on the corresponding sides.

The electromagnetic relay can be applied to a power grid system. When the coil of one of the magnetic circuit portions 5 is normally excited and the coil of the other magnetic circuit portion 5 is abnormally excited: the left contact group and the left monitoring contact group of the main loop are closed, and the potential of a left monitoring contact pin is the same as that of the power generation side of the power grid system; the right side contact group and the right monitoring contact group of the main loop are in a disconnected state, the right monitoring contact foot is in a suspended state, and the abnormity of the right side contact group of the main loop is judged.

When the excitation of the coil of one of the magnetic circuit portions 5 is abnormal and the excitation of the coil of the other magnetic circuit portion 5 is normal: the left contact group and the left monitoring contact group of the main loop are disconnected, a left monitoring contact pin is in a suspended state, and the left contact group of the main loop is judged to be abnormal; and closing the contact group on the right side of the main loop and the right monitoring contact group, wherein the right monitoring contact pin is the same as the power grid side of the power grid system, and judging that the contact group on the left side of the main loop is abnormal.

When the coils of both magnetic circuit portions 5 are excited abnormally: the left contact group of the main loop, the left monitoring contact group, the right contact group of the main loop and the right monitoring contact group are all in a disconnected state, the right monitoring contact foot of the left monitoring contact foot is all in a suspended state, the circuit has no output, and the left contact group and the right contact group of the main loop are judged to be abnormal.

When the coils of the two magnetic circuit parts 5 are de-energized, the left contact of the main circuit is bonded, and the right contact is normally disconnected, the potential of the left monitoring contact pin is the same as that of the power generation side, and the right monitoring contact pin is in a suspended state, so that the bonding abnormality of the left contact is judged.

When the coils of the two magnetic circuit parts 5 are de-energized, the left contact of the main circuit is normally disconnected, and the right contact is bonded, the left monitoring contact pin is in a suspended state, the potential of the right monitoring contact pin is the same as that of the power grid, and the right contact is determined to be bonded abnormally.

When the coils of the two magnetic circuit parts 5 are de-energized and the left contact and the right contact of the main circuit are bonded, the potentials of the left monitoring contact pin and the right monitoring contact pin are both provided with potentials, the main circuit is output, and the fact that the left contact and the right contact of the main circuit are bonded abnormally at the same time is judged.

Therefore, the invention realizes the monitoring of the connection state and the potential of the power leading-out pins of the following contact monitoring loop, and when the connection of the left contact group and the right contact group is abnormal and the potentials of the left contact leading-out pins and the right contact leading-out pins are normal, the current is connected, so that the circuit is connected; when one group of the contacts is detected to be abnormal, the circuit can be disconnected through the other group of the contacts, so that the safety of the product is improved.

Example two

Referring to fig. 5, an electromagnetic relay according to the present invention is different from the first embodiment in that: the contact system does not comprise the monitoring component 3.

EXAMPLE III

Referring to fig. 6 to 10, an electromagnetic relay according to the present invention is different from the first embodiment in that: the movable spring part 1 further comprises a soft conductive piece 13, and two ends of the soft conductive piece 13 are respectively and electrically connected to two ends of the movable spring piece 11, so that the soft conductive piece 13 and the movable spring piece 11 are connected in parallel. The soft conductive piece 13 comprises one or more of a soft connecting lead, a braided lead and a multi-layer copper foil flexible connecting band. Specifically, the movable spring piece 11, the soft conductive piece 13, and the movable contact 12 are fixedly connected by riveting, and the movable spring piece 11 is located on a side of the soft conductive piece 13 opposite to the movable contact 12.

In this embodiment, the movable spring plate 11 is made of a weak conductive material, and specifically, the movable spring plate 11 is made of a stainless steel material, and has the characteristics of good elasticity, poor conductivity, good thermal stability and the like, so that the problem of heat generation during the operation of the movable spring plate can be effectively avoided. At this time, the soft conductive component 13 mainly plays a role of carrying current in a loop, and the movable spring 11 mainly plays a role of providing restoring reaction force, and in other embodiments, the movable spring is made of a good conductive material, so that the movable spring of the present invention can utilize the soft conductive component to shunt, thereby improving the current carrying capability of the present invention, and making the present invention suitable for a high-current environment.

In this embodiment, the first elastic arm 111 and the second elastic arm 112 are respectively provided with at least one hollow hole to improve the elastic capability thereof.

In this embodiment, as shown in fig. 10, the magnetism isolating member is a magnetism isolating sheet 9 fixedly connected to the outer side surface of the other side of the yoke 55, the magnetism isolating sheet 9 is used to isolate the other side of the yoke 55 from the other side of the armature 54 to prevent the two from directly contacting, and the fixing connection mode is riveting or other fixing connection modes. The bottom of the base 4 is provided with a rubber stopper 20 for leading out pins of the static spring pieces 21 and the monitoring static spring pieces 33 which are positioned at the same side to penetrate through, so as to prevent or reduce sealant from entering the second cavity 42. In the embodiment, the contact system also comprises two groups of monitoring assemblies 3, and the monitoring movable spring pieces 31 of the monitoring assemblies 3 are fixedly connected with the movable spring pieces 11 in a riveting manner, but the fixed connection manner is not limited to riveting.

In this embodiment, the fixing element 8 is riveted to the middle of the movable spring plate 11 and is fixedly connected to the upper cavity wall of the second cavity 42, and the fixing element 8 is in an inverted u-shape, as shown in fig. 8. The bottom end of the shell 10 is open, and the bottom end of the shell 10 is fixedly connected with the base 4 and contains the magnetic circuit system and the contact system.

The working principle of the electromagnetic relay is as described above, and is not described herein again.

Example four

Referring to fig. 11, an electromagnetic relay according to the present invention is different from the third embodiment in that: the contact system does not comprise the monitoring component 3.

EXAMPLE five

Referring to fig. 12, an electromagnetic relay according to the present invention is different from the first embodiment in that: the number of the movable reeds 11 is multiple, the multiple movable reeds 11 are overlapped together, and the first elastic arm 111 and the second elastic arm 112 of one part of the movable reeds 11 are respectively provided with at least one arched bending part.

In this embodiment, the contact system also includes two sets of monitoring components 3, and the monitoring movable springs 31 of the two sets of monitoring components 3 are respectively integrally formed on the first elastic arm 111 and the second elastic arm 112 of one of the movable springs, but is not limited thereto. One movable spring leaf is positioned at the topmost layer of the plurality of movable spring leaves 11, and the arched bending part is not arranged.

In this embodiment, the movable spring portion 1 does not include the soft conductive member 13.

EXAMPLE six

Referring to fig. 13, an electromagnetic relay according to the present invention is different from the first embodiment in that: the monitoring movable spring part does not comprise a monitoring movable contact, the monitoring static spring part does not comprise a monitoring static contact, and the monitoring movable spring piece 31 is directly contacted with or separated from the monitoring static spring piece 33 to be closed or disconnected.

The parts which are not involved in the electromagnetic relay are the same as or can be realized by the prior art.

The above embodiments are only used to further illustrate the electromagnetic relay of the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention fall within the protection scope of the technical solution of the present invention.

Claims (10)

1. An electromagnetic relay comprises a base, a contact system and a magnetic circuit system, wherein the contact system comprises at least one group of movable spring parts and a plurality of groups of static spring parts, each movable spring part comprises a movable spring piece and a plurality of movable contacts, and two ends of each movable spring piece are respectively provided with at least one movable contact; each group of static spring parts respectively comprise a static spring piece arranged on the base and at least one static contact arranged on the static spring piece, and the movable contact is matched with the static contact; the method is characterized in that: the movable spring plate is fixedly connected with at least one fixing piece at a position between two ends of the movable spring plate, and the movable spring plate forms a first elastic arm and a second elastic arm which are positioned at two sides of the position; the magnetic circuit system drives the first elastic arm through the first pushing piece, and drives the second elastic arm through the second pushing piece.

2. An electromagnetic relay according to claim 1, characterized in that: the magnetic circuit system comprises two mutually independent magnetic circuit parts, wherein the armature of one magnetic circuit part drives the first elastic arm through the first pushing piece, and the armature of the other magnetic circuit part drives the second elastic arm through the second pushing piece; or the magnetic circuit system comprises a magnetic circuit part, and the armature of the magnetic circuit part drives the first elastic arm and the second elastic arm of the movable spring respectively through the first pushing piece and the second pushing piece.

3. An electromagnetic relay according to claim 2, characterized in that: the first pushing piece and the second pushing piece are respectively and movably arranged on the base, or the first pushing piece and the second pushing piece are respectively arranged on an armature of the magnetic circuit part.

4. An electromagnetic relay according to claim 2, characterized in that: the magnetic circuit part comprises a coil rack, a coil wound on the coil rack, an iron core inserted in the coil rack, a yoke iron and an armature iron, wherein the yoke iron is positioned outside the coil rack and is in contact connection or integrated molding with one end of the iron core, and the armature iron is arranged at a knife edge of the yoke iron in a swinging manner and is matched with the other end of the iron core.

5. An electromagnetic relay according to claim 4, characterized in that: the yoke iron is L-shaped, one side of the yoke iron is in contact connection with one end of the iron core or is integrally formed, and the other side of the yoke iron is provided with the knife edge; the armature iron is L-shaped, one side of the armature iron is matched with the other end of the iron core, and the other side of the armature iron is matched with the outer side of the other side of the yoke iron to form a driving part; the other side of the armature iron is in clearance fit with the other side of the yoke iron or is matched with a magnetic isolation piece which is fixedly connected with the yoke iron or the armature iron, or the magnetic isolation piece is fixedly connected with the base or integrally formed on the base; and a restoring spring for restoring the armature is matched between the armature and the yoke iron.

6. An electromagnetic relay according to any one of claims 1-5, characterized in that: the first pushing piece is made of an insulating material, or the part of the first pushing piece, which is used for being in contact with the movable reed, is made of an insulating material; the second pushing piece is made of an insulating material, or the part of the second pushing piece, which is used for being in contact with the movable reed, is made of an insulating material; the first pushing piece and the second pushing piece are respectively of a columnar structure.

7. An electromagnetic relay according to claim 1, characterized in that: a plurality of movable contacts are respectively arranged at two ends of the movable reed and are distributed along the width direction of the movable reed; the number of the static spring parts is two, the static springs of the two groups of static spring parts are respectively provided with a plurality of static contacts, and the plurality of static contacts of the two groups of static spring parts are respectively matched with the plurality of movable contacts at the two ends of the movable spring in a one-to-one correspondence manner.

8. The electromagnetic relay according to claim 1 or 7, characterized in that: the number of the movable reeds is one, or the number of the movable reeds is multiple, and multiple movable reeds are overlapped together; the part is the middle part of the movable reed.

9. An electromagnetic relay according to claim 1, characterized in that: the fixing piece and the base are integrally formed, or the fixing piece is fixedly connected to the base; the fixing piece is shaped like a Chinese character 'ji' or inverted Chinese character 'ji'.

10. An electromagnetic relay according to claim 1, characterized in that: the base is provided with a first cavity and a second cavity, the magnetic circuit system is arranged in the first cavity, and the contact system is arranged in the second cavity; the first cavity is wholly or partially positioned above the second cavity.

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