CN219123159U - Electromagnetic relay - Google Patents

Abstract

The utility model 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 reed and a plurality of movable contacts, and at least one movable contact is respectively arranged at two ends of each movable reed; each group of static spring part comprises a static reed and at least one static contact arranged on the static reed, and the movable contact is matched with the static contact; the movable reed is fixedly connected to a fixing piece at a position between two ends of the movable reed, so that the movable reed 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 utility model ensures that whether the movable contact and the fixed contact at the two ends of the movable reed are adhered or not can not be mutually influenced, thereby reducing the influence of the adhesion of one group of contacts on the other group of contacts and further improving the anti-adhesion performance of the utility model.

Description

Electromagnetic relay

Technical Field

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

Background

An electromagnetic relay is an electronic control device which is commonly used in automatic control circuits and is actually an "automatic switch" which uses a smaller current to control a larger current, thus playing roles in automatic regulation, safety protection, switching circuits, etc. in the circuit.

The contact system of the electromagnetic relay in the prior art forms two groups of contacts, the two groups of contacts form a series connection mode 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 injection molded with an armature insert of a magnetic circuit system through a plastic piece, so that the armature drives the movable reed to act. The two groups of contacts are synchronous and are simultaneously closed or opened, when one group of contacts are stuck due to arc burning, the contacts are fused together, so that the other group of contacts cannot be opened or are slightly opened, and the conductive loop is poor in contact and poor in anti-adhesion performance.

Disclosure of Invention

The utility model provides an electromagnetic relay aiming at the technical problems in the prior art, which improves the installation form of a movable reed and adopts two pushing pieces to push respectively, so that whether two groups of contacts formed at two ends of the movable reed are adhered or not can not influence each other.

The technical scheme adopted 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 reed and a plurality of movable contacts, and at least one movable contact is respectively arranged at two ends of each movable reed; each group of static spring part comprises a static spring plate arranged on the base and at least one static contact arranged on the static spring plate, and the movable contact is matched with the static contact; the movable reed is fixedly connected to at least one fixing piece at a position between two ends of the movable reed, so that the movable reed 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 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; alternatively, 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 through the first pushing piece and the second pushing piece respectively.

Further, the first pushing piece and the second pushing piece are respectively movably arranged on the base, or the first pushing piece and the second pushing piece are respectively arranged on the armature of the magnetic circuit part.

Further, the magnetic circuit part comprises a coil frame, a coil wound on the coil frame, an iron core inserted on the coil frame, a yoke iron and an armature iron, wherein the yoke iron is positioned outside the coil frame, 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.

Further, 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 with the outer side of the other side of the yoke iron, and forms 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 magnetism isolating piece, and the magnetism isolating piece is fixedly connected with the yoke iron or the armature iron or is fixedly connected with the base or integrally formed with the base; a restoring spring for providing armature restoration 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 contacted 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 contacted with the movable reed, is made of an insulating material; the first pushing piece and the second pushing piece are respectively of columnar structures.

Further, two ends of the movable reed are respectively provided with a plurality of movable contacts, and the movable contacts are distributed along the width direction of the movable reed; the number of the static spring parts is two, the static spring pieces 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 piece in a one-to-one correspondence manner.

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

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

Further, 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 located above the second cavity.

Compared with the prior art, the utility model has the following beneficial effects:

1. because the movable reed is fixedly connected to a fixing piece at a position between two ends of the movable reed, the movable reed forms the first elastic arm and the second elastic arm, and the first elastic arm and the second elastic arm are driven by the magnetic circuit system through the first pushing piece and the second pushing piece separately, whether movable contacts and static contacts at two ends of the movable reed are adhered or not can not be influenced mutually, and therefore the influence of adhesion of one group of contacts on the other group of contacts is reduced, and further the anti-adhesion performance of the movable reed 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 utility model can be applied to special occasions.

3. The movable contact is respectively arranged at the two ends of the movable reed, so that at least two groups of contacts are respectively formed at the two ends of the movable reed in parallel connection, 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-dividing manner, so that the insulation performance of the contact system and the magnetic circuit system is greatly improved.

The utility model is described in further detail below with reference to the drawings and examples; an electromagnetic relay of the present utility model is not limited to the embodiment.

Drawings

FIG. 1 is an exploded view of an embodiment of the present utility model (without a housing);

FIG. 2 is a schematic perspective view of a contact system of the present utility model (including a first pusher, a second pusher, etc.);

FIG. 3 is a front view of an embodiment of the utility model (without the housing);

FIG. 4 is a cross-sectional view A-A of FIG. 3, illustrating an embodiment;

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

FIG. 6 is an exploded view of the present utility model of embodiment three;

fig. 7 is a front view of a contact system of the third embodiment of the present utility model (including a first pusher, a second pusher, etc.);

FIG. 8 is a front view I (without the housing) of the present utility model of embodiment III;

FIG. 9 is a front view II (with a housing) of the present utility model according to the third embodiment

FIG. 10 is a cross-sectional view of B-B of FIG. 9 of embodiment III;

FIG. 11 is a schematic view showing a perspective construction of a contact system (including a first pusher, etc.) according to the fourth embodiment of the present utility model;

FIG. 12 is a schematic view showing a perspective construction of a contact system (including a first pusher, etc.) according to the fifth embodiment of the present utility model;

FIG. 13 is a schematic view showing a perspective construction of a contact system (including a first pusher, etc.) of the sixth embodiment of the present utility model;

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

Detailed Description

In the present disclosure, the terms "first," "second," and the like are used merely to distinguish between similar objects and not necessarily to describe a particular sequence or order, nor are they to be construed as indicating or implying a relative importance. In the description, the directions or positional relationships indicated by "upper", "lower", "left", "right", etc. are used based on the directions or positional relationships shown in the drawings, only for convenience of describing the present utility model, and are not intended to indicate or imply that the apparatus must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the scope of protection of the present utility model. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In addition, in the description of the present application, unless otherwise indicated, "a plurality" means a number of two or more, and "at least one" means a number of one or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Example 1

Referring to fig. 1-4, the electromagnetic relay of the present utility model includes a base 4, a housing (as shown in fig. 7), a contact system and a magnetic circuit system, wherein the contact system includes at least one group of movable spring parts 1 and a plurality of groups of static spring parts 2, the movable spring parts 1 include movable springs 11 and a plurality of movable contacts 12, and two ends of the movable springs 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 contact 22 in a one-to-one correspondence manner. The movable spring 11 is fixedly connected to a fixing piece 8 at a position between two ends of the movable spring 11, so that the movable spring 11 forms a first elastic arm 111 and a second elastic arm 112 positioned at two sides of the position; the magnetic circuit system drives the first elastic arm 111 through the first pushing piece 6, and drives the second elastic arm 112 through the second pushing piece 7. The location is preferably the middle of the movable contact spring 11 such that the first elastic arm 111 and the second elastic arm 112 of the movable contact spring 11 are symmetrical or substantially symmetrical to each other. The movable reed 11 is of a single-piece structure, and the movable reed 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 11. The two ends of the movable spring 11 are two ends in the longitudinal direction of the movable spring 11.

In this embodiment, the magnetic circuit system includes two magnetic circuit portions 5 that are independent of each other, wherein one magnetic circuit portion 5 drives the first elastic arm 111 through the first pushing member 6, and the other magnetic circuit portion 5 drives the second elastic arm 112 through the second pushing member 7. Two magnetic circuit portions 5 are arranged side by side, and each magnetic circuit portion 5 is horizontal. In other embodiments, the magnetic circuit system only includes 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, where the first pushing member and the second pushing member may be independent from 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 with or integrally formed with one end of the iron core 53, the armature 54 is swingably disposed at a knife edge of the yoke 55 and is engaged with the other end of the iron core 53, and a restoring reed 56 for providing restoration of the armature 54 is engaged between the armature 54 and the yoke 55. Specifically, the yoke 55 has an L-shape, one side of which is in contact with or integrally formed with one end of the iron core 53, and the other side of which is located outside the bobbin 51 and is provided with the knife edge; the armature 54 has an L-shape, one side of which is engaged with the other end of the iron core 53, and the other side of which forms a driving portion, i.e., for applying force to the first pushing member 6 and/or the second pushing member 7. The other side of the armature 54 is either in clearance fit with the other side of the yoke 55 or is fitted with a magnetic shield that separates the other side of the yoke 55 from the other side of the armature 54, preventing direct contact between the two. The magnetic shielding member is fixedly connected to the yoke 55 or the armature 54, or the magnetic shielding member is fixedly connected to or integrally formed with the base 4, specifically, the magnetic shielding member is integrally formed with the base and is a horizontal partition 43, as shown in fig. 4. The first pushing member 6 and the second pushing member 7 are movably mounted to the base 4, respectively, and are located at positions adapted to be pushed by the armatures 54 of the respective magnetic circuit portions 5, respectively. In other embodiments, the first and second pushers are each mounted to an armature of a corresponding 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 reed 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, especially, a portion of the second pushing member 7, which is used for contacting the movable reed 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 in a columnar structure, but are not limited thereto.

In this embodiment, a plurality of movable contacts 12 are respectively disposed at two ends of the movable reed 11, and the plurality of movable contacts 12 are arranged along the width direction of the movable reed 11. The stationary springs 21 of each set of stationary spring portions 2 are provided with a plurality of stationary contacts 22, respectively. Therefore, at least two groups of contacts are respectively formed at the two ends of the movable reed 11 in parallel connection, 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 of both ends of the movable contact spring, assuming that the loop current is I, the current of each contact is I, and the contact resistance of the left contact group and the right contact is R, the heating power at the contact portion is:

P＝I ² R+I ² R

when a double-contact (namely, two movable contacts 12 are respectively arranged at two ends of a movable contact spring 11) parallel structure 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 under the condition of not adopting a multi-loop parallel structure.

In this embodiment, the base 4 is provided with a first cavity 41 and a second cavity 42, the magnetic circuit system is mounted in the first cavity 41, and the contact system is mounted 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 up and the second cavity 42 is down. Specifically, the magnetic circuit system is mounted in 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 parts 5. The contact system is laterally inserted into the second cavity 42, and the leading-out leg of the static spring 21 is located below the base 4.

In this embodiment, the fixing member 8 is integrally formed on the base 4 or fixedly connected to the base 4, specifically, the fixing member 8 is fixedly connected to the lower cavity wall of the second cavity 42, and the fixing member 8 is approximately shaped like a Chinese character 'ji'. The first cavity 41 and the second cavity 42 are isolated from each other, only two through jacks are arranged on a common wall between the first cavity 41 and the second cavity 42, the first pushing piece 6 and the second pushing piece 7 are respectively movably inserted into the two jacks, the upper ends of the first pushing piece 6 and the second pushing piece 7 are positioned in the first cavity 41, a round of outer flange is arranged, the lower ends of the first pushing piece 6 and the second pushing piece 7 are positioned in the second cavity 42, and the lower ends of the first pushing piece 6 and the second pushing piece 7 are respectively matched with positions of the first elastic arm 111 and the second elastic arm 112 which are suitable for pushing the movable reed 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, and the closer the pushing points are to the contact group, the larger the pressure of the contacts is under the same condition, so that the implementation is simple.

In this embodiment, the contact system of the present utility model further includes a monitoring assembly 3, where the monitoring assembly 3 includes a monitoring movable spring part and a monitoring static 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 static spring part includes a monitoring static spring 33 mounted on the base 4 and a monitoring static contact 34 disposed on the monitoring static spring 33, and the monitoring movable contact 32 is matched with the monitoring static contact 34; the monitoring movable spring 31 is electrically connected to or integrally formed with the movable spring 11, so that the monitoring movable spring portion and the driving spring 11 follow up to be contacted with or separated from the monitoring static spring portion. The monitoring movable reed 31 and/or the monitoring static reed 33 have a deformability to ensure that the monitoring movable reed portion and the monitoring static reed portion 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 reed 11 are respectively electrically connected or integrally formed with the monitoring movable reed 31, and the electrical connection manner is riveting, but not limited thereto. The portion of the movable monitoring reed 31 where the movable monitoring contact 32 is provided extends outward from one side in the width direction of the movable reed 11. Therefore, the monitoring assembly 3 of the present utility model forms a following type monitoring contact set, which is disposed on the strong electric 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 set of contacts, and insulation and isolation are not required to be formed by a physical isolation manner, so that the structure is greatly simplified. Therefore, the utility model can realize the potential monitoring of the single monitoring pin 331 and the safety monitoring of the main contact loop, thereby carrying out safe and reliable circuit control and operation according to the potential condition of the monitoring pin 331.

An electromagnetic relay of the present utility model is specifically, but not limited to, a normally open relay, and in other embodiments, is a normally closed or switching relay. The movable spring part 1 and the 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 the first pushing piece 6/the second pushing piece 7), and the two pushing pieces can be directly driven by one magnetic circuit part or can be separately driven by 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 meanwhile, 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 both the movable contact 12 and the fixed contact 22 on the two sides are closed, the conduction of a circuit is realized, and in the conduction state, a load current forms a conductive main loop through the fixed reed 21-the fixed contact 22-the movable contact 12-the movable reed 11-the movable contact 12-the fixed contact 22-the fixed reed 21 on the other side. When the main loop contact and the monitoring contact are closed, the potential of the monitoring leading-out pin 331 is consistent with that of the main loop, so that the contact state of the main loop contact is monitored; when the product is de-excited, the movable reed 11 recovers the deformation, the main loop contact is disconnected, and meanwhile, the movable reed 31 is also recovered along with the recovery of the movable reed 11 in the process of recovering the deformation of the movable reed 11, so that the monitoring contact is disconnected, and the monitoring leading-out pin 331 is in a suspended state.

The movable spring part 1 and the static spring part 2 of the electromagnetic relay form a bridge contact structure, so that whether the movable contact 12 and the static contact 22 at two ends of the movable spring 11 are adhered or not can not affect each other, and the influence of adhesion of one group of contacts on the other group of contacts is reduced. The monitoring movable reed 31 is electrically connected or integrally formed on the movable reed 11, so that the monitoring component 3 of the utility model forms a following type monitoring contact group which is arranged on the strong electric side and is used for testing each group of contacts together with the main loop, only one monitoring contact leading-out pin is used, and insulation and isolation are not required to be formed in a physical isolation mode, so that the structure is greatly simplified. In order to achieve a strong current isolation of the main circuit from a weak current isolation of the monitoring circuit, the utility model may be used to connect a large resistor in series in the circuit of the monitoring static spring section to ground or to N (i.e. zero line) such that the load current flows substantially through the main circuit when the contacts are closed.

An electromagnetic relay of the present utility model, when coils of its two magnetic circuit portions 5 are normally excited: when the main circuit left side contact set, the left monitoring contact set, the main circuit right side contact set and the right monitoring contact set are all 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). The left side contact set/right side contact set refers to a contact set formed by the movable contact 12 and the fixed contact 22 correspondingly matched on the corresponding sides. The left monitoring contact set/right monitoring contact set refers to a contact set formed by a monitoring movable contact 32 and a monitoring stationary contact 34 which are correspondingly matched on the corresponding sides.

The electromagnetic relay provided by the utility model 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 side contact set and the left monitoring contact set of the main loop are closed, and the potential of the left monitoring contact pin is the same as that of the power generation side of the power grid system; the main circuit right side contact set and the right monitoring contact set are in an open state, the right monitoring contact pin is in a suspended state, and the main circuit right side contact set is judged to be abnormal.

When the coil excitation of one of the magnetic circuit portions 5 is abnormal and the coil of the other magnetic circuit portion 5 is normally excited: the left side contact set and the left monitoring contact set of the main loop are disconnected, the left monitoring contact pin is in a suspended state, and the abnormity of the left side contact set of the main loop is judged; and closing the contact group on the right side of the main loop and the right monitoring contact group, wherein a 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 main circuit left side contact set, the left monitoring contact set, the main circuit right side contact set and the right monitoring contact set are all in an open state, the left monitoring contact pin and the right monitoring contact pin are all in a suspended state, the circuit does not output, and the main circuit left and right contact sets are judged to be abnormal.

When the coils of the two magnetic circuit parts 5 are deenergized, 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, the right monitoring contact pin is in a suspended state, and the left contact is judged to be bonded abnormally.

When the coils of the two magnetic circuit parts 5 are deenergized, 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 electric potential of the right monitoring contact pin is the same as that of the electric network, and the right contact is judged to have abnormal bonding.

When the coils of the two magnetic circuit parts 5 are deenergized, 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 provided with an output, and the fact that the bonding abnormality occurs at the left contact and the right contact of the main circuit is judged.

Therefore, the utility model monitors the on state and the electric potential of the power leading-out pins through the following contact monitoring loop, and when the left contact set and the right contact set are not abnormal and the electric potential of the left contact leading-out pin and the right contact leading-out pin are normal, the current is switched on to realize the conduction of the circuit; when one set of contacts is monitored to find an abnormal condition, the circuit can be opened through the other set of contacts, so that the safety of the product is improved.

Example two

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

Example III

Referring to fig. 6 to 10, an electromagnetic relay according to the present utility model is different from the first embodiment in that: the movable spring part 1 further comprises a soft conductive piece 13, wherein two ends of the soft conductive piece 13 are respectively and electrically connected with two ends of the movable spring 11, so that the soft conductive piece 13 is connected with the movable spring 11 in parallel. The flexible conductive member 13 includes one or more of flexible connection wires, braided wires and multi-layered copper foil flexible connection tape. Specifically, the movable reed 11, the soft conductive member 13, and the movable contact 12 are fixedly connected by riveting, and the movable reed 11 is located at one side of the soft conductive member 13 opposite to the movable contact 12.

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

In this embodiment, at least one hollowed hole is formed in each of the first elastic arm 111 and the second elastic arm 112 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, and the other side of the yoke 55 and the other side of the armature 54 are isolated by the magnetism isolating sheet 9 to prevent direct contact therebetween, and the fixed connection mode is riveting or other fixed connection modes. The bottom of the base 4 is provided with a blocking film 20 for passing through the leading-out pin of the static reed 21 and the leading-out pin of the monitoring static reed 33 on the same side, so as to prevent or reduce the sealant from entering the second cavity 42, in this embodiment, the contact system also includes two groups of monitoring components 3, and the monitoring movable reed 31 of the monitoring components 3 is fixedly connected with the movable reed 11 by riveting, but the fixed connection mode is not limited to riveting.

In this embodiment, the fixing member 8 is riveted to the middle portion of the movable spring 11 and is fixedly connected to the upper cavity wall of the second cavity 42, and the fixing member 8 is in an inverted-v 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 accommodates the magnetic circuit system and the contact system therein.

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

Example IV

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

Example five

Referring to fig. 12, an electromagnetic relay according to the present utility model is different from the first embodiment in that: the number of the movable spring plates 11 is multiple, the movable spring plates 11 are stacked together, and at least one arched bending part is respectively arranged on the first elastic arm 111 and the second elastic arm 112 of a part of the movable spring plates 11.

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 movable spring, but not limited thereto. One movable spring piece is positioned at the topmost layer of the movable spring pieces 11, and the arched bending part is not arranged.

In this embodiment, the moving spring part 1 does not include the soft conductive member 13.

Example six

Referring to fig. 13, an electromagnetic relay according to the present utility model 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 reed 31 is directly contacted with the monitoring static reed 33 to be closed or separated from the monitoring static reed.

The electromagnetic relay of the utility model is not related to the same part as the prior art or can be realized by the prior art.

The above embodiment is only used for further illustrating an electromagnetic relay of the present utility model, but the present utility model is not limited to the embodiment, and any simple modification, equivalent variation and modification made to the above embodiment according to the technical substance of the present utility model falls within the protection scope of the technical solution of the present utility model.

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 reed and a plurality of movable contacts, and at least one movable contact is respectively arranged at two ends of each movable reed; each group of static spring part comprises a static spring plate arranged on the base and at least one static contact arranged on the static spring plate, and the movable contact is matched with the static contact; the method is characterized in that: the movable reed is fixedly connected to at least one fixing piece at a position between two ends of the movable reed, so that the movable reed 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. The electromagnetic relay according to claim 1, wherein: the magnetic circuit system comprises two mutually independent magnetic circuit parts, wherein the armature iron of one magnetic circuit part drives the first elastic arm through the first pushing piece, and the armature iron of the other magnetic circuit part drives the second elastic arm through the second pushing piece; alternatively, 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 through the first pushing piece and the second pushing piece respectively.

3. The electromagnetic relay according to claim 2, wherein: the first pushing piece and the second pushing piece are respectively movably arranged on the base, or the first pushing piece and the second pushing piece are respectively arranged on the armature iron of the magnetic circuit part.

4. The electromagnetic relay according to claim 2, wherein: the magnetic circuit part comprises a coil frame, a coil wound on the coil frame, an iron core inserted on the coil frame, a yoke iron and an armature iron, wherein the yoke iron is positioned outside the coil frame, 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.

5. The electromagnetic relay according to claim 4, wherein: 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, and forms 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 magnetism isolating piece, and the magnetism isolating piece is fixedly connected with the yoke iron or the armature iron or is fixedly connected with the base or integrally formed with the base; a restoring spring for providing armature restoration is matched between the armature and the yoke iron.

6. The electromagnetic relay according to any one of claims 1-5, wherein: the first pushing piece is made of an insulating material, or the part of the first pushing piece, which is used for being contacted 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 contacted with the movable reed, is made of an insulating material; the first pushing piece and the second pushing piece are respectively of columnar structures.

7. The electromagnetic relay according to claim 1, wherein: 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 spring pieces 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 piece in a one-to-one correspondence manner.

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

9. The electromagnetic relay according to claim 1, wherein: the fixing piece and the base are integrally formed, or the fixing piece is fixedly connected to the base; the fixing piece is in a shape like a Chinese character 'ji' or an inverted Chinese character 'ji'.

10. The electromagnetic relay according to claim 1, wherein: 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 located above the second cavity.

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