CN218730704U

CN218730704U - Relay with a movable contact

Info

Publication number: CN218730704U
Application number: CN202222688324.1U
Authority: CN
Inventors: 代文广; 王萌; 苏礼季; 陈松生
Original assignee: Xiamen Hongfa Electric Power Controls Co Ltd
Current assignee: Xiamen Hongfa Electric Power Controls Co Ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-03-24
Anticipated expiration: 2032-10-12

Abstract

The utility model discloses relay, including contact container, a pair of stationary contact leading-out terminal, first magnetizer, push rod subassembly, movable contact subassembly and elastic component. The contact container is provided with a contact chamber, and the static contact leading-out end is connected with the contact container; the first magnetizer is fixedly arranged relative to the contact container through the connecting part; the push rod component comprises a rod part and a second magnetizer; the rod part is movable relative to the contact container, the second magnetizer is arranged at one end of the rod part, and the second magnetizer is staggered with the magnetic conduction part along the axial direction of the rod part and corresponds to the connecting part; the movable contact assembly is movable between a first position and a second position relative to the supporting seat along the axial direction of the rod part, and comprises a movable spring and a third magnetizer; the distance between the third magnetizer and the connecting part is greater than the distance between the third magnetizer and the magnetic conductive part; the elastic member is to apply an elastic force to the movable contact assembly to move toward the first position.

Description

Relay with a movable contact

Technical Field

The embodiment of the utility model provides a relate to relay technical field particularly, relate to a high voltage direct current relay.

Background

A relay is an electronic control device having a control system (also called an input loop) and a controlled system (also called an output loop), and is generally applied to an automatic control circuit. Relays are actually "reclosers" that use a smaller current to control a larger current. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like.

The high-voltage direct-current relay is one of relays, and in order to solve the problem that contacts of the high-voltage direct-current relay are opened due to electric repulsion generated by short-circuit current, an anti-short-circuit loop electromagnetic structure is generally arranged in the related art. Further, the following type and the fixed type are distinguished according to the position of the upper yoke. Specifically, the follow-up structure means that the upper yoke is provided on the movable assembly of the relay, and the fixed structure means that the upper yoke is provided at a fixed position other than the movable assembly. However, although the short-circuit resistance of the fixed short-circuit resistance structure is greatly enhanced, the breaking capacity is reduced because the short-circuit capacity and the breaking capacity show negative correlation. And the follow-up short-circuit resisting structure is influenced by the holding force of the movable iron core, when the short-circuit current is higher, the iron core can be separated to cause the disconnection of the contact, the holding force of the movable iron core is increased, a coil needs to be increased, and the structure is contradictory to small volume and light weight.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a relay to compromise anti short circuit ability and limit breaking capacity.

The utility model provides a relay, including contact container, a pair of stationary contact leading-out terminal, first magnetizer, pushing rod subassembly, movable contact subassembly and elastic component, contact container has the contact cavity; a pair of stationary contact terminals are connected to the contact container, and at least a portion of each of the stationary contact terminals is located within the contact chamber; the first magnetizer is arranged in the contact chamber; the first magnetizer comprises a connecting part and a magnetic conduction part connected with the connecting part, and the first magnetizer is fixedly arranged relative to the contact container through the connecting part; the push rod component comprises a rod part and a second magnetizer; the rod part is movable relative to the contact container along the axial direction of the rod part, the second magnetizer is arranged at one end of the rod part, and the second magnetizer is staggered with the magnetic conductive part along the axial direction of the rod part and corresponds to the connecting part; the movable contact assembly is movable relative to the push rod assembly along the axial direction of the rod part between a first position close to the fixed contact leading-out end and a second position far away from the fixed contact leading-out end, the movable contact assembly comprises a movable spring piece and a third magnetizer, and at least part of the third magnetizer is fixedly connected to one side, away from the first magnetizer and the second magnetizer, of the movable spring piece along the axial direction of the rod part; the third magnetizer and the first magnetizer are used for forming a first magnetic conductive loop, and the third magnetizer and the second magnetizer are used for forming a second magnetic conductive loop; the distance between the third magnetizer and the connecting part is greater than the distance between the third magnetizer and the magnetic conductive part; the elastic piece is arranged between the movable contact assembly and the push rod assembly and is used for applying elastic force moving towards the first position to the movable contact assembly.

According to some embodiments of the utility model, magnetic conduction portion with connecting portion structure as an organic whole, just magnetic conduction portion certainly connecting portion orientation the movable contact spring extends.

According to the utility model discloses a some embodiments, first magnetizer includes two relative magnetic conduction portions that set up, two magnetic conduction portion connect respectively in connecting portion edge two relative sides of movable contact spring's length direction, so that first magnetizer forms one and falls the U type.

According to some embodiments of the present invention, the movable contact assembly is in the state of the first position, the magnetic conduction portion with the magnetic spacing between the third magnetizers is greater than the magnetic spacing between the second magnetizer and the third magnetizer.

According to some embodiments of the invention, the second magnetizer directly contacts with the third magnetizer when the movable contact assembly is in the first position.

According to some embodiments of the utility model, the catch bar subassembly still includes the supporting seat, the fixed setting of supporting seat is in axial one end is followed in pole portion, and at least part stretches into the contact cavity, second magnetizer fixed connection in the supporting seat, the elastic component is located the movable contact subassembly with between the supporting seat.

According to some embodiments of the invention, the support seat comprises:

the base is connected to one end of the rod part, and the elastic piece is arranged between the base and the movable contact component; and

a bracket connected to the base; the second magnetizer is connected to the inner wall surface of the bracket, and the movable reed and the third magnetizer are movably arranged in a space surrounded by the base and the bracket.

According to some embodiments of the invention, the bracket comprises:

the second magnetizer is connected to the inner wall surface of the top; and

the two side parts are respectively connected to two sides of the top part and extend from the top part to the base; one ends of the two side parts, which are far away from the top part, are respectively connected with the base, and the two side parts, the top part and the base together form a space for the movable contact assembly to move.

According to some embodiments of the invention, the contact container further has a pair of first and second through holes, both communicating with the contact chamber; the pair of stationary contact leading-out ends are correspondingly arranged in the pair of first through holes in a penetrating mode;

the relay further comprises a connecting piece, the connecting piece penetrates through the second through hole and comprises a first end and a second end, the first end is connected with the contact container, and the second end is connected with the connecting portion.

According to some embodiments of the invention, the contact container comprises:

a yoke iron plate; and

the insulating cover comprises a top wall and a side wall, one end of the side wall is connected to the periphery of the top wall in a surrounding mode, and the other end of the side wall is connected to the yoke iron plate;

the first through hole and the second through hole are formed in the top wall, and the first end of the connecting piece is connected with the outer wall surface of the top wall.

According to some embodiments of the present invention, the insulating cover comprises a ceramic cover and a frame piece, the ceramic cover comprises the top wall and the side wall, and the other end of the side wall is connected to the yoke plate through the frame piece;

in the outer wall surface of the top wall, a first metalized layer is arranged at the periphery of the first through hole, and a second metalized layer is arranged at the periphery of the second through hole;

the fixed contact leading-out end is welded with the top wall through the first metalized layer, and the first end of the connecting piece is welded with the top wall through the second metalized layer.

According to some embodiments of the invention, the top wall and the side wall are of unitary construction; or the top wall and the side wall are of split structures and are connected through welding.

According to some embodiments of the invention, the connecting portion is spaced from an inner wall surface of the top wall.

a yoke iron plate; and

an insulating cover connected to the yoke plate;

the relay further comprises a fixing frame, the fixing frame is arranged in the contact cavity and fixedly connected to the yoke iron plate, and the connecting portion is fixedly connected to the fixing frame.

An embodiment of the above utility model has at least the following advantages or beneficial effects:

the utility model discloses the relay, first magnetizer are for the fixed setting of contact container, and form fixed anti short circuit structure between magnetic conduction portion and the third magnetizer, form the anti short circuit structure of trailing type between the second magnetizer of push rod subassembly and the third magnetizer, the magnetic conduction portion and the second magnetizer of first magnetizer stagger along the axial of pole portion, and the connecting portion and the second magnetizer of first magnetizer correspond along the axial of pole portion, the utility model discloses under the disconnected requirement of anti short circuit and limit of the relay satisfying, first magnetizer still can not occupy the space on the axial direction of perpendicular to pole portion excessively, is favorable to dwindling the volume of relay.

Drawings

Fig. 1 shows a perspective view of the relay according to the present invention.

Fig. 2 shows a schematic view of fig. 1 with the ceramic cover and frame piece removed.

Fig. 3 shows a schematic top view of fig. 1.

Fig. 4 showsbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A in fig. 3.

Fig. 5 shows an exploded view of fig. 1.

Fig. 6 shows a cross-sectional view B-B of fig. 3, in which the ceramic cap, the frame piece and the connecting piece have been omitted and the overtravel has been completed.

Fig. 7 shows a cross-sectional view C-C of fig. 3, in which the ceramic cap, the frame piece and the connecting piece have been omitted and the overtravel has been completed.

Fig. 8 showsbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 3, in which the ceramic hood, the frame piece and the connecting piece have been omitted and the overtravel has been completed.

Fig. 9 is a cross-sectional view B-B of fig. 3, in which the ceramic cover, the frame piece, and the connecting member are omitted, and the movable spring plate is just in contact with or just separated from the stationary contact terminal.

Fig. 10 is a cross-sectional view of C-C of fig. 3, in which the ceramic cover, the frame piece, and the connecting member are omitted, and the movable spring plate is just in contact with or just separated from the stationary contact terminal.

Fig. 11 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 3, in which the ceramic cover, the frame piece, and the connecting member are omitted, and the movable spring piece is just in contact with or just separated from the stationary contact terminal.

Fig. 12 is an exploded schematic view of a relay according to an embodiment of the present invention.

Wherein the reference numerals are as follows:

10. contacting the container; 101. a contact chamber; 102. a first through hole; 103. a second through hole; 11a, an insulating cover; 11. a ceramic cover; 111. a top wall; 112. a side wall; 113. a first metallization layer; 114. a second metallization layer; 12. a frame piece; 13. a yoke iron plate; 131. a third through hole; 20. a stationary contact leading-out terminal; 30. A connecting member; 31. a first end of a connector; 32. a second end of the connector; 40. a first magnetizer; 410. A connecting portion; 420. a magnetic conductive part; 50. a push rod assembly; 51. a rod portion; 52. a supporting base; 521. a base; 522. a support; 523. a top portion; 524. a side portion; 53. a movable contact assembly; 54. a movable spring plate; 55. A third magnetizer; 56. an elastic member; 60. a second magnetizer; 1100. a housing; 1110. a first housing; 1120. a second housing; 1130. exposing holes; 1200. an electromagnet unit; 1210. a bobbin; 1220. A coil; 1240. a movable iron core; 1250. a reset member; 1300. an arc extinguishing unit; 1310. an arc extinguishing magnet; 1320. a yoke iron clamp; 1400. a sealing unit; 1410. a metal cover; d1, the motion direction; d2, the length direction.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

As shown in fig. 12, fig. 12 is an exploded schematic view of a relay according to an embodiment of the present invention. The relay includes a case 1100, an electromagnet unit 1200, an arc extinguishing unit 1300, and a sealing unit 1400. The sealing unit 1400 is disposed in the housing 1100, and the top of the stationary contact terminal of the sealing unit 1400 is exposed to the outer surface of the housing 1100 through the exposure hole 1130 of the housing 1100. The electromagnet unit 1200 and the arc extinguishing unit 1300 are both disposed within the housing 1100.

As an example, the casing 1100 includes a first case 1110 and a second case 1120, and the first case 1110 and the second case 1120 are snapped to form a chamber for accommodating the electromagnet unit 1200, the arc extinguishing unit 1300, and the sealing unit 1400.

The arc extinguishing unit 1300 is used to extinguish an arc generated between the stationary contact terminal of the sealing unit 1400 and the movable spring.

As an example, the arc extinguishing unit 1300 includes two arc extinguishing magnets 1310. The quenching magnets 1310 may be permanent magnets, and each quenching magnet 1310 may have a substantially rectangular parallelepiped shape. The two quenching magnets 1310 are respectively disposed on both sides of the sealing unit 1400, and are disposed to face each other along the longitudinal direction D2 of the movable spring.

By providing two opposing quenching magnets 1310, a magnetic field can be formed around the stationary contact terminal and the movable contact spring. Therefore, the arc generated between the fixed contact leading-out end and the movable spring piece is elongated in the direction away from each other by the action of the magnetic field, and arc extinction is realized.

The arc extinguishing unit 1300 further includes two yoke clips 1320, and the two yoke clips 1320 are disposed corresponding to the positions of the two arc extinguishing magnets 1310. Also, two yoke clips 1320 surround the sealing unit 1400 and the two quenching magnets 1310. By surrounding the arc extinguishing magnet 1310 with the yoke clamp 1320, the magnetic field generated by the arc extinguishing magnet 1310 is prevented from diffusing outward and affecting the arc extinguishing effect. Yoke clip 1320 is made of a soft magnetic material. Soft magnetic materials may include, but are not limited to, iron, cobalt, nickel, alloys thereof, and the like.

As shown in fig. 1 to 5, fig. 1 is a schematic perspective view of a relay according to a first embodiment of the present invention. Fig. 2 shows a schematic view of fig. 1 with the ceramic hood 11 and the frame piece 12 removed. Fig. 3 shows a schematic top view of fig. 1. Fig. 4 showsbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A in fig. 3. Fig. 5 shows an exploded view of fig. 1.

The sealing unit 1400 of the embodiment of the present invention includes a contact container 10, a pair of stationary contact terminals 20, a first magnetizer 40, a push rod assembly 50, a movable contact assembly 53, and an elastic member 56.

It will be understood that the terms "comprises" and "comprising," and any variations thereof, in the embodiments of the present invention, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or may alternatively include other steps or elements inherent to such process, method, article, or apparatus.

The contact vessel 10 has a contact chamber 101 inside. The contact receptacle 10 may include an insulation cover 11a and a yoke plate 13, the insulation cover 11a is covered on one side surface of the yoke plate 13, and the insulation cover 11a and the yoke plate 13 jointly enclose a contact chamber 101.

The insulating cover 11a includes a ceramic cover 11 and a frame piece 12. The ceramic cover 11 is connected to the yoke plate 13 via a frame piece 12. The frame piece 12 may be a metal piece with a ring structure, such as iron-nickel alloy, and one end of the frame piece 12 is connected to the opening edge of the ceramic cover 11, for example, by laser welding, soldering, resistance welding, gluing, etc. The other end of the frame piece 12 is connected to the yoke plate 13, and may be welded by laser welding, brazing, resistance welding, gluing, or the like. A frame piece 12 is provided between the ceramic cover 11 and the yoke plate 13 to facilitate the connection of the ceramic cover 11 and the yoke plate 13.

The ceramic cover 11 includes a top wall 111 and a side wall 112, one end of the side wall 112 is connected around the top wall 111, and the other end of the side wall 112 is connected to the yoke plate 13 through the frame piece 12. In the present embodiment, the other end of the side wall 112 is connected to the yoke plate 13 via the frame piece 12.

The contact container 10 also has a pair of first and second through

holes

102 and 103, and the first and second through

holes

102 and 103 are communicated with the contact chamber 101. The first through hole 102 is used for the stationary contact leading-out terminal 20 to penetrate through, and the second through hole 103 is used for a connecting piece 30 to penetrate through.

As an example, the first through hole 102 and the second through hole 103 are both opened in the top wall 111 of the ceramic cover 11. The second through hole 103 may be provided between the two first through holes 102, i.e., the connector 30 is provided between the pair of stationary contact terminals 20.

The number of the second through holes 103 may be two, for two connecting members 30 to pass through, but not limited thereto.

A pair of stationary contact terminals 20 are attached to the contact receptacle 10, with at least a portion of each stationary contact terminal 20 being located within the contact chamber 101. One of the pair of stationary contact terminals 20 serves as a terminal into which current flows, and the other serves as a terminal from which current flows.

The pair of stationary contact terminals 20 are inserted into the pair of first through holes 102 in a one-to-one correspondence, and are connected to the top wall 111 of the ceramic cover 11, for example, by welding.

The bottom of the stationary contact terminal 20 serves as a stationary contact, and the stationary contact may be integrally or separately provided at the bottom of the stationary contact terminal 20.

The first magnetizer 40 is disposed in the contact chamber 101 and is fixed relative to the contact container 10. The first magnetic conductor 40 includes a connection portion 410 and a magnetic conductive portion 420 connected to the connection portion 410. The first magnetic conductor 40 is fixed to the contact container 10 by a connecting portion 410, and the magnetic conductive portion 420 is used to form a magnetic conductive loop with the third magnetic conductor 55.

The push rod assembly 50 is movably coupled to the contact receptacle 10 in the moving direction D1. The push rod assembly 50 includes a rod portion 51, a support seat 52, and a second magnetizer 60. The rod 51 is movable relative to the contact container 10 in the axial direction of the rod 51 (i.e., in the moving direction D1), the support seat 52 is fixedly disposed at one end of the rod 51 in the axial direction and at least partially protrudes into the contact chamber 101, and the second magnetizer 60 is fixedly connected to the support seat 52. The second magnetic conductor 60 is offset from the magnetic conductive portion 420 in the axial direction of the rod portion 51, and corresponds to the connecting portion 410.

It should be noted that, in the axial direction of the rod portion 51, the offset of the second magnetic conductor 60 and the magnetic conductive portion 420 can be understood as: along the axial direction of the rod part 51, the orthographic projection of the second magnetizer 60 to the movable spring is not overlapped with the orthographic projection of the magnetic conduction part 420 to the movable spring. The second magnetic conductor 60 corresponding to the connecting portion 410 can be understood as: along the axial direction of the rod part 51, the orthographic projection of the second magnetizer 60 to the movable spring is at least partially overlapped with the orthographic projection of the magnetic conductive part 420 to the movable spring.

As an example, the second magnetizer 60 and the supporting seat 52 may be fixed by riveting, but not limited thereto.

The yoke plate 13 has third through holes 131, the third through holes 131 penetrate through both opposite sides of the yoke plate 13 in a thickness direction of the yoke plate 13, and the third through holes 131 communicate with the contact chamber 101 of the contact receptacle 10. The rod 51 is axially movably inserted through the third through hole 131.

Of course, in other embodiments, the push rod assembly 50 may have other configurations known in the art, and will not be further described herein.

The movable contact assembly 53 is movable relative to the push lever assembly 50 in the axial direction of the lever portion 51 between a first position close to the stationary contact terminal 20 and a second position away from the stationary contact terminal 20. The movable contact assembly 53 includes a movable contact 54 and a third magnetic conductor 55, and at least a part of the third magnetic conductor 55 is fixedly connected to a side of the movable contact 54 facing away from the first magnetic conductor 40 and the second magnetic conductor 60 along the axial direction of the rod portion 51. That is, along the thickness direction of the movable spring 54 (i.e., along the moving direction D1), the first magnetizer 40 and the second magnetizer 60 are located at one side of the movable spring 54, and at least a portion of the third magnetizer 55 is located at the other side of the movable spring 54. The distance between the third magnetic conductor 55 and the connecting portion 410 is greater than the distance between the third magnetic conductor 55 and the magnetic conductive portion 420.

It should be noted that the "first position" and the "second position" in which the movable contact assembly 53 is movable relative to the push lever assembly 50 along the axial direction of the lever portion 51 between the first position and the second position refer to the relative positions of the movable contact assembly 53 and the push lever assembly 50.

Specifically, when the electromagnet unit 1200 is energized, the lever 51, the support seat 52, and the movable contact assembly 53 can be driven to move together in a direction approaching the fixed contact terminal 20. After the movable contact assembly 53 contacts the stationary contact terminal 20, the movable contact assembly 53 is stopped by the stationary contact terminal 20, and the lever 51 and the support base 52 still continue to move upward until the overtravel process is completed. During the overtravel, relative movement occurs between the movable contact assembly 53 and the push rod assembly 50.

If the movable contact member 53 is defined as stationary during the overtravel, the push rod member 50 will move upward relative to the movable contact member 53. If the push rod assembly 50 is defined to be stationary during the over-travel, the movable contact assembly 53 is moved downward relative to the push rod assembly 50.

Then, when the movable contact assembly 53 is separated from the fixed contact terminal 20 or the movable contact assembly 53 is just in contact with the fixed contact terminal 20, the movable contact assembly 53 is located in the first position relative to the push rod assembly 50, i.e., the movable contact assembly 53 is located close to the fixed contact terminal 20 relative to the push rod assembly 50. When during the overtravel process, the movable contact assembly 53 moves downward relative to the push rod assembly 50, i.e., the movable contact assembly 53 moves relative to the push rod assembly 50 in a direction away from the stationary contact terminal 20, until the movable contact assembly 53 moves to a second position relative to the push rod assembly 50. The overtravel is completed when the movable contact assembly 53 moves to the second position relative to the push rod assembly 50. At this time, the compression amount of the elastic member 56 is at a maximum.

It can be seen that when the movable contact assembly 53 is in the first position relative to the push rod assembly 50, the movable contact assembly 53 can be considered to be separated from the stationary contact terminal 20 or the movable contact assembly 53 is just in contact with the stationary contact terminal 20. When the movable contact assembly 53 is in the second position relative to the push rod assembly 50, the overtravel is completed.

As an example, the third magnetic conductor 55 and the movable spring 54 may be fixed by riveting, but not limited thereto.

It is understood that the first magnetizer 40, the second magnetizer 60, and the third magnetizer 55 may be made of iron, cobalt, nickel, and alloy thereof.

In one embodiment, the second magnetic conductor 60 may be a straight line, and the first magnetic conductor 40 and the third magnetic conductor 55 may be U-shaped, but not limited thereto.

It is understood that the first magnetizer 40, the second magnetizer 60, and the third magnetizer 55 may be designed to include a plurality of stacked magnetic conductive sheets as necessary.

Both ends of movable contact spring 54 are adapted to contact the bottoms of a pair of stationary contact terminals 20 to effect contact closure. Both ends of the movable spring 54 in the length direction D2 thereof may serve as movable contacts. The movable contact at the two ends of the movable spring plate 54 may protrude from other portions of the movable spring plate 54 or may be flush with the other portions.

It is understood that the movable contact may be integrally or separately provided at both ends of the movable spring 54 in the length direction D2 thereof.

The elastic member 56 is provided between the movable contact assembly 53 and the support base 52 for applying an elastic force to the movable contact assembly 53 to move toward the first position.

As an example, the elastic member 56 may be a spring, but is not limited thereto.

In one embodiment, one end of the elastic element 56 abuts against the supporting seat 52, and the other end abuts against the third magnetic conductor 55 of the movable contact assembly 53.

Of course, in other embodiments, a through hole may be formed in the third magnetic conductor 55, and the elastic member 56 may pass through the through hole and abut against the movable spring 54.

The support base 52 includes a base 521 and a bracket 522. The base 521 is connected to one end of the shaft 51 in the axial direction, and the bracket 522 is connected to the base 521. The second magnetizer 60 is connected to an inner wall surface of the bracket 522, the movable spring 54 and the third magnetizer 55 are movably disposed between the base 521 and the bracket 522, one end of the elastic member 56 abuts against the base 521, and the other end abuts against the third magnetizer 55.

In one embodiment, the stand 522 may have an inverted U-shape and engage with the base 521. The base 521 and the holder 522 enclose a chamber for accommodating the movable contact assembly 53 and the elastic member 56.

The stand 522 may include a top portion 523 and two side portions 524, wherein the two side portions 524 are respectively connected to two sides of the top portion 523 and extend from the top portion 523 toward the base 521, so that the stand 522 forms an inverted U shape. The ends of the two side portions 524 away from the top portion 523 are respectively connected to the base 521. A space for the movable spring 54 and the third magnetic conductor 55 to pass through and move is formed between the two side portions 524.

The second magnetic conductor 60 is connected to an inner wall surface of the top portion 523. In a state where the movable contact spring 54 is not in contact with the stationary contact terminal 20 or the movable contact spring 54 is just in contact with the stationary contact terminal 20, the movable contact spring 54 abuts against the second magnetic conductor 60 by the elastic force of the elastic member 56. During the overtravel, the fixed contact terminal 20 stops the moving contact assembly 53 (the moving contact piece 54 and the third magnetizer 55), and the moving contact assembly 53 remains stationary, while the rod 51 drives the supporting base 52 and the second magnetizer 60 to move upward, and at this time, the moving contact assembly 53 and the base 521 press the elastic member 56 together.

It is understood that in other embodiments, the second magnetic conductor 60 may be fixedly connected to one end of the rod 51 instead of the bracket 522 of the support 52. Specifically, the movable contact assembly 53 may be provided with a through hole, the rod portion 51 is disposed through the through hole of the movable contact assembly 53, and the second magnetizer 60 is disposed at one end of the rod portion 51.

The sealing unit 1400 further includes a metal cover 1410, the metal cover 1410 is connected to a side of the yoke plate 13 facing away from the insulating cover 11a, and the metal cover 1410 covers the third through hole 131 on the yoke plate 13. The metal cover 1410 and the yoke plate 13 define a chamber for accommodating a stationary core and a movable core 1240 of the electromagnet unit 1200, which will be described in detail below.

As shown in fig. 4 and 12, the electromagnet unit 1200 includes a bobbin 1210, a coil 1220, a stationary core, a movable core 1240, and a restoring member 1250. The bobbin 1210 has a hollow cylindrical shape and is formed of an insulating material. The metal cap 1410 is inserted into the coil former 1210. A coil 1220 surrounds the bobbin 1210. The static iron core is fixedly arranged in the metal cover 1410, and part of the static iron core extends into the third through hole 131. The stationary iron core has a through hole, and the through hole is arranged corresponding to the position of the third through hole 131, and is used for the rod part 51 to penetrate through. A movable core 1240 is movably disposed within the metal cover 1410 and is disposed opposite the stationary core, the movable core 1240 connecting the rod portion 51 for attraction by the stationary core when the coil 1220 is energized. The plunger 1240 and the shaft 51 may be bolted, riveted, welded, or otherwise connected.

The reset member 1250 is disposed inside the metal cover 1410 and between the stationary core and the movable core 1240 to reset the movable core 1240 when the coil 1220 is de-energized. The restoring member 1250 may be a spring and is sleeved outside the rod part 51.

As shown in fig. 6-8, fig. 6 shows a cross-sectional view B-B of fig. 3, in which the ceramic caps, frame pieces and connecting members are omitted and the overtravel has been completed. Fig. 7 shows a cross-sectional view C-C of fig. 3, in which the ceramic cap, the frame piece and the connecting piece have been omitted and the overtravel has been completed. Fig. 8 showsbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 3, in which the ceramic cap, the frame piece and the connecting piece have been omitted and the overtravel has been completed.

Fig. 6 to 8 show the state when the overtravel has been completed. In this state, the movable contact assembly 53 can be considered to be in the second position relative to the push rod assembly 50.

As shown in fig. 6 and 7, since the first magnetic circuit is formed between the first magnetic conductor 40 and the third magnetic conductor 55, a magnetic attraction force is generated between the first magnetic conductor 40 and the third magnetic conductor 55. A second magnetic conductive loop is formed between the second magnetic conductor 60 and the third magnetic conductor 55, so that a magnetic attraction force is generated between the second magnetic conductor 60 and the third magnetic conductor 55. Since the first magnetic conductor 40 is fixedly disposed with respect to the contact container 10, a fixed short-circuit resisting structure is formed between the first magnetic conductor 40 and the third magnetic conductor 55 when the short-circuit current is conducted, and a holding force of the fixed short-circuit resisting structure is provided by the contact container 10. Since the second magnetic conductor 60 is fixedly connected to the supporting seat 52 of the push rod assembly 50, when the short-circuit current is turned on, a follow-up short-circuit resisting structure is formed between the second magnetic conductor 60 and the third magnetic conductor 55, and the holding force of the follow-up short-circuit resisting structure is provided by the coil of the relay. Under the invariable prerequisite of coil drive, the utility model discloses dual anti short circuit structure has effectively promoted the upper limit of anti short circuit current-carrying ability.

It should be noted that, as shown in fig. 8, the second magnetic conductor 60 and the magnetic conductive portion 420 are staggered along the axial direction of the rod portion 51, so that the magnetic conductive loop formed between the magnetic conductive portion 420 and the third magnetic conductor 55 and the magnetic conductive loop formed between the second magnetic conductor 60 and the third magnetic conductor 55 do not affect each other, and thus the magnetic attraction of the magnetic conductive portion 420 and the magnetic attraction of the second magnetic conductor 60 do not affect each other, and the short-circuit resistance effect is ensured.

In addition, the distance between the third magnetic conductor 55 and the connecting portion 410 of the first magnetic conductor 40 is greater than the distance between the third magnetic conductor 55 and the magnetic conductive portion 420 of the first magnetic conductor 40. It will be appreciated that the magnetic flux flows primarily to the magnetic circuit where the magnetic spacing is small. Therefore, as can be seen from fig. 6 and 7, when the movable spring 54 is short-circuited, most of the magnetic flux flows between the third magnetic conductor 55 and the magnetic conductive part 420 and between the third magnetic conductor 55 and the second magnetic conductor 60, and only a small amount of magnetic flux exists between the third magnetic conductor 55 and the connecting part 410. Therefore, although the second magnetic conductor 60 and the connecting portion 410 are disposed in the axial direction of the rod portion 51 (that is, the orthographic projections of the second magnetic conductor 60 and the connecting portion 410 on the movable reed 54 have an overlapping portion), since most of the magnetic flux flows to the magnetic conductive portion 420 and the second magnetic conductor 60, and very little of the magnetic flux flows to the connecting portion 410, the magnetic attraction between the connecting portion 410 and the second magnetic conductor 60 only slightly weakens the magnetic attraction generated between the whole first magnetic conductor 40 and the third magnetic conductor 55, and the short-circuit resistance is not affected.

It should be noted that, along the axial direction of the rod portion 51, the connecting portion 410 of the first magnetizer 40 corresponds to the second magnetizer 60, and the magnetic conductive portion 420 of the first magnetizer 40 is staggered from the second magnetizer 60, so that the first magnetizer 40 does not occupy too much space along the axial direction perpendicular to the rod portion 51, which is beneficial to reducing the volume of the relay.

Fig. 9 is a sectional view of B-B of fig. 3, in which the ceramic cover, the frame piece, and the coupling member are omitted, and the movable spring plate is just in contact with or just separated from the stationary contact terminal, as shown in fig. 9 to 11. Fig. 10 is a cross-sectional view of C-C of fig. 3, in which the ceramic cover, the frame piece, and the coupling member are omitted, and the movable spring plate is just in contact with or just separated from the stationary contact terminal. Fig. 11 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 3, in which the ceramic cover, the frame piece, and the connecting member are omitted, and the movable spring piece is just in contact with or just separated from the stationary contact terminal.

Fig. 9 to 11 show a state in which the movable spring 54 is just in contact with or separated from the stationary contact terminal 20. In this state, the movable contact assembly 53 can be considered to be in the first position relative to the push rod assembly 50.

For convenience of explanation, the relay of the present invention can satisfy the effect of the overload current breaking requirement on the basis of improving the short-circuit resistance, and fig. 9 to 11 show the state when the movable spring 54 and the stationary contact terminal 20 are just separated.

When the coil of the relay is de-energized, the push rod assembly 50 moves downward relative to the stationary contact terminal 20 under the action of the plunger 1240 of the relay, which corresponds to the moving of the movable contact assembly 53 relative to the push rod assembly 50 from the second position to the first position, i.e., from fig. 7 to fig. 10. During the movement of the movable contact assembly 53 from the second position to the first position, the magnetic spacing between the second and third

magnetic conductors

60, 55 gradually decreases. When the movable contact assembly 53 moves to the first position, the second magnetizer 60 contacts the movable contact assembly 53, and the magnetic distance between the second magnetizer 60 and the third magnetizer 55 is smaller than the magnetic distance between the magnetic conductive portion 420 and the third magnetizer 55.

It is understood that most of the magnetic flux flows to the magnetic circuit having a smaller magnetic spacing, that is, most of the magnetic flux flows to the magnetic circuit formed by the second and third

magnetic conductors

60 and 55. For example, as shown in fig. 10, a magnetic induction line is formed between the magnetic conductive portion 420 of the first magnetic conductor 40 and the third magnetic conductor 55. As shown in fig. 9, three lines of magnetic induction are formed between the second magnetic conductor 60 and the third magnetic conductor 55.

At this time, the magnetic attraction force between the second magnetic conductor 60 and the third magnetic conductor 55 is large, and the magnetic attraction force between the magnetic conductive part 420 and the third magnetic conductor 55 is small. And because the second magnetizer 60 contacts with the movable contact assembly 53, the magnetic attraction between the second magnetizer 60 and the third magnetizer 55 is changed into an internal force, and the breaking of the movable spring 54 is not influenced. Therefore, the movable spring 54 can be disconnected by overcoming only a small magnetic attraction force between the magnetic conductor 420 and the third magnetic conductor 55. Furthermore, along the axial direction of the rod 51, the second magnetizer 60 and the connecting portion 410 are disposed correspondingly (i.e. the orthographic projections of the second magnetizer 60 and the connecting portion 410 on the movable reed 54 have an overlapping portion), but since most of the magnetic flux flows to the magnetizer 420 and the second magnetizer 60 and very little of the magnetic flux flows to the connecting portion 410, the magnetic attraction force generated between the whole first magnetizer 40 and the third magnetizer 55 is only slightly weakened by the connecting portion 410 and the second magnetizer 60, which is beneficial for breaking. In addition, the magnetic induction line of the connecting portion 410 and the magnetic induction line of the second magnetizer 60 are in the same direction, so that repulsive acting force is generated between the connecting portion 410 and the second magnetizer 60, and the breaking is further facilitated.

It can be seen from this that, first magnetizer 40 is fixed for contact container 10 and sets up, and form fixed anti short circuit structure between magnetic conduction portion 420 and the third magnetizer 55, second magnetizer 60 fixed connection is in push rod assembly 50's supporting seat 52, and form the anti short circuit structure of trailing type between the third magnetizer 55, magnetic conduction portion 420 and second magnetizer 60 of first magnetizer 40 stagger along the axial of pole portion 51, connecting portion 410 and second magnetizer 60 of first magnetizer 40 correspond along the axial of pole portion 51, the utility model discloses under the disconnected requirement of relay satisfying anti short circuit and limit, first magnetizer 40 still can not occupy the space along the axial direction of perpendicular to pole portion 51 excessively, is favorable to reducing the volume of relay.

It is understood that when the movable contact assembly 53 is in the first position relative to the push rod assembly 50, the second magnetic conductor 60 and the third magnetic conductor 55 may be in direct contact or may have a gap.

In this embodiment, the movable contact assembly 53 is in the first position relative to the push rod assembly 50 and the second magnetic conductor 60 is in direct contact with the third magnetic conductor 55. Thus, a larger portion of the magnetic flux flows to the magnetic circuit formed by the second magnetic conductor 60 and the third magnetic conductor 55, and a smaller portion of the magnetic flux flows to the magnetic circuit formed by the magnetic conductive part 420 and the third magnetic conductor 55. The magnetic attraction between the magnetic conductive part 420 and the third magnetic conductor 55 is small, which is more beneficial to the breaking of the movable contact spring 54 and the stationary contact leading-out terminal 20.

As shown in fig. 4 and 5, the magnetic conductive part 420 is integrated with the connection part 410, and the magnetic conductive part 420 extends from the connection part 410 toward the movable spring 54.

In this embodiment, the first magnetic conductor 40 includes two magnetic conductive portions 420 disposed oppositely, and the two magnetic conductive portions 420 are respectively connected to two opposite sides of the connecting portion 410 along the length direction D2 of the movable spring plate 54, so that the first magnetic conductor 40 forms an inverted U shape.

Of course, in other embodiments, the first magnetic conductor 40 may also be L-shaped, one side of the L-shape may be the connecting portion 410, and the other side may be the magnetic conductive portion 420.

As shown in fig. 4 and 5, the relay according to the embodiment of the present invention further includes a connecting member 30, the connecting member 30 is disposed through the second through hole 103, and includes a first end 31 and a second end 32, the first end 31 is connected to the contact container 10, and the second end 32 is connected to the first magnetic conductor 40.

The utility model discloses relay, first magnetizer 40's connecting portion 410 pass through connecting piece 30 and connect contact container 10, and do not directly be connected with contact container 10 for the connection process does not have and shelters from, visualizes, both convenient operation, ensures the reliability of connecting again.

Further, the first through hole 102 and the second through hole 103 are opened on the top wall 111 of the ceramic cover 11, and the first end 31 of the connecting member 30 is connected to the outer wall surface of the top wall 111.

In the outer wall surface of the top wall 111, a first metallization layer 113 is provided around the first through hole 102, and a second metallization layer 114 is provided around the second through hole 103. The stationary contact terminal 20 is welded to the top wall 111 through the first metallization 113, and the first end 31 of the connector 30 is welded to the top wall 111 through the second metallization 114.

The outer wall surface of the ceiling wall 111 of the ceramic cover 11 is more likely to form a welding plane than the inner wall surface of the ceramic cover 11. Further, since the top wall 111 of the ceramic cover 11 needs to be provided with the stationary contact terminal 20, and a metalized layer needs to be provided around the first through hole 102 when the stationary contact terminal 20 is welded to the top wall 111, the second metalized layer 114 of the second through hole 103 is also processed when the first metalized layer 113 of the first through hole 102 is processed. Therefore, by welding the connecting member 30 to the outer wall surface of the top wall 111 of the ceramic cover 11, it is possible to process the metalized layer only on the outer wall surface of the top wall 111 without processing the metalized layer on the inner wall surface of the top wall 111, which facilitates the processing and simplifies the processing steps.

The connecting portion 410 of the first magnetic conductor 40 is spaced from the inner wall surface of the top wall 111. The connecting portion 410 of the first magnetic conductor 40 is spaced from the inner wall surface of the top wall 111, so that a gap is formed between the connecting portion 410 and the inner wall surface of the top wall 111. Since the connecting portion 410 does not directly contact the inner wall surface of the top wall 111, the arrangement of the first magnetic conductor 40 does not affect the creepage distance of the pair of stationary contact terminals 20.

The top wall 111 and the side wall 112 are separate structures and are connected by welding.

It will be appreciated that the connection of the connection member 30 to the top wall 111 is facilitated by designing the ceramic cover 11 as a separate structure of the top wall 111 and the side wall 112. Of course, the top wall 111 and the side wall 112 may be adhered to each other.

Specifically, since the top wall 111 is sheet-shaped, the sheet-shaped structure makes it easier to machine the first via hole 102, the second via hole 103, the first metallization layer 113, and the second metallization layer 114 on the top wall 111. Further, the sheet-like structure also makes it easier to perform welding of the connector 30 and the top wall 111 and welding of the stationary contact terminal 20 and the top wall 111.

Of course, the top wall 111 and the side wall 112 may be of unitary construction.

The second end 32 of the connecting member 30 can be connected to the first magnetic conductor 40 by various methods, such as welding, riveting, gluing, etc.

Of course, in other embodiments, the first magnetic conductor 40 is fixedly disposed relative to the contact container 10, and besides the first magnetic conductor 40 is fixedly connected to the ceramic cover 11 through the connecting member 30, the first magnetic conductor 40 may also be fixedly connected to a fixing frame. Specifically, the relay further includes a fixing bracket disposed in the contact chamber 101 and fixedly connected to the yoke plate 13. The connecting portion 410 of the first magnetizer 40 is fixedly connected to the fixing frame.

It is understood that the various embodiments/implementations provided by the present invention can be combined without contradiction, and are not illustrated herein.

In the embodiments of the present invention, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the terms "a" and "an" are used merely to introduce a feature and are not to be construed as a limitation on the particular number of such features unless specifically defined otherwise; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the invention and is not intended to limit the same, and various modifications and changes may be made to the embodiment by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present invention should be included in the scope of the embodiments of the present invention.

Claims

1. A relay, comprising:

a contact vessel having a contact chamber;

a pair of stationary contact terminals connected to the contact container, and at least a portion of each of the stationary contact terminals being located in the contact chamber;

the first magnetizer is arranged in the contact chamber; the first magnetizer comprises a connecting part and a magnetic conduction part connected with the connecting part, and the first magnetizer is fixedly arranged relative to the contact container through the connecting part;

the push rod assembly comprises a rod part and a second magnetizer; the rod part is movable relative to the contact container along the axial direction of the rod part, the second magnetizer is arranged at one end of the rod part, and the second magnetizer is staggered with the magnetic conductive part along the axial direction of the rod part and corresponds to the connecting part;

the movable contact assembly is movable relative to the push rod assembly along the axial direction of the rod part between a first position close to the fixed contact leading-out end and a second position far away from the fixed contact leading-out end, the movable contact assembly comprises a movable spring piece and a third magnetizer, and at least part of the third magnetizer is fixedly connected to one side, away from the first magnetizer and the second magnetizer, of the movable spring piece along the axial direction of the rod part; the third magnetizer and the first magnetizer are used for forming a first magnetic conductive loop, and the third magnetizer and the second magnetizer are used for forming a second magnetic conductive loop; the distance between the third magnetizer and the connecting part is greater than the distance between the third magnetizer and the magnetic conductive part; and

and the elastic piece is arranged between the movable contact assembly and the push rod assembly and is used for applying elastic force moving towards the first position to the movable contact assembly.

2. The relay according to claim 1, wherein said magnetic conductive portion is of a unitary construction with said connecting portion and extends from said connecting portion toward said movable spring.

3. The relay according to claim 2, wherein the first magnetic conductor comprises two magnetic conductive portions disposed oppositely, and the two magnetic conductive portions are respectively connected to two opposite side edges of the connecting portion along the length direction of the movable spring, so that the first magnetic conductor forms an inverted U shape.

4. The relay according to claim 1, wherein a magnetic spacing between the magnetically permeable portion and the third magnetically permeable body is greater than a magnetic spacing between the second magnetically permeable body and the third magnetically permeable body in a state where the movable contact assembly is in the first position.

5. The relay according to claim 4, wherein said second magnetic conductor is in direct contact with said third magnetic conductor when said movable contact assembly is in said first position.

6. The relay according to claim 1, wherein said push rod assembly further comprises a support base fixedly disposed at an end of said rod portion in the axial direction and extending at least partially into said contact chamber, said second magnetic conductor is fixedly connected to said support base, and said elastic member is disposed between said movable contact assembly and said support base.

7. The relay according to claim 6, wherein the support base comprises:

8. The relay according to claim 7, wherein the bracket comprises:

the second magnetizer is connected to the inner wall surface of the top; and

9. The relay according to any one of claims 1 to 8, wherein the contact container further has a pair of a first through hole and a second through hole, both of which communicate with the contact chamber; the pair of stationary contact leading-out ends are correspondingly arranged in the pair of first through holes in a penetrating manner one by one;

the relay further comprises a connecting piece, wherein the connecting piece penetrates through the second through hole and comprises a first end and a second end, the first end is connected with the contact container, and the second end is connected with the connecting portion.

10. The relay according to claim 9, wherein the contact container comprises:

a yoke iron plate; and

11. The relay according to claim 10, wherein said insulating cover comprises a ceramic cover and a frame piece, said ceramic cover comprising said top wall and said side wall, the other end of said side wall being connected to said yoke plate by said frame piece;

12. The relay according to claim 10, wherein said top wall and said side wall are of unitary construction; or the top wall and the side wall are of split structures and are connected through welding.

13. The relay according to claim 10, wherein the connecting portion is spaced from an inner wall surface of the top wall.

14. The relay according to claim 1, wherein the contact container comprises:

a yoke iron plate; and

an insulating cover connected to the yoke plate;