CN219497658U

CN219497658U - Relay device

Info

Publication number: CN219497658U
Application number: CN202320799412.0U
Authority: CN
Inventors: 代文广; 苏礼季; 王萌; 陈松生
Original assignee: Xiamen Hongfa Electric Power Controls Co Ltd
Current assignee: Xiamen Hongfa Electric Power Controls Co Ltd
Priority date: 2023-04-11
Filing date: 2023-04-11
Publication date: 2023-08-08
Anticipated expiration: 2033-04-11

Abstract

The utility model discloses a relay, which comprises a contact container, a stationary contact leading-out end, a movable piece, a first magnetizer, a movable component and a fixed magnetizer, wherein the contact container is provided with a contact chamber and a pair of first through holes, and the first through holes are communicated with the contact chamber; the static contact leading-out end is arranged in the first through hole in a penetrating way; the movable member is movable relative to the contact receptacle; the first magnetizer is connected with the movable piece; the movable component comprises a movable spring which is used for contacting with or separating from a pair of stationary contact leading-out ends, and the first magnetizer is arranged at one side of the movable spring facing the stationary contact leading-out ends; the fixed magnetizer is fixedly arranged in the contact container; the fixed magnetizer is arranged at one side of the first magnetizer, which is opposite to the movable spring; the first magnetizer is movable relative to the movable member through the movable piece and is used for adjusting the distance between the first magnetizer and the movable member according to the magnitude of the current value of the flow moving spring.

Description

Relay device

Technical Field

The embodiment of the utility model relates to the technical field of electronic control devices, in particular to a 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), which is generally used in an automatic control circuit. A relay is in fact an "automatic switch" that uses a smaller current to control a larger current. Therefore, the circuit plays roles of automatic adjustment, safety protection, circuit switching and the like.

The high-voltage direct current relay is one of the relays, and in order to solve the problem that the contact of the high-voltage direct current relay bounces off due to electric repulsive force generated by short-circuit current, an anti-short-circuit ring electromagnetic structure is usually arranged in the related art. The upper magnetizer of the anti-short circuit ring is further divided into a follow-up structure and a fixed structure according to the setting position of the upper magnetizer. Specifically, the follow-up structure means that the upper magnetizer is provided on the movable assembly of the relay, and the fixed structure means that the upper magnetizer 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 weakened due to the negative correlation of the short circuit resistance and the breaking capacity. However, the follow-up anti-short-circuit structure is affected by the holding force of the movable iron core, when the short-circuit current is high, the iron core can be separated to cause the contacts to be disconnected, the holding force of the movable iron core is increased, and the coil is required to be increased, which is contradictory to the small-size and light-weight.

Disclosure of Invention

The embodiment of the utility model provides a relay, which is used for considering both short circuit resistance and limit breaking capacity.

The relay of the embodiment of the utility model comprises:

A contact container having a contact chamber and a pair of first through holes, the first through holes communicating with the contact chamber;

the pair of stationary contact leading-out ends are respectively penetrated in the pair of first through holes;

a movable member movable relative to the contact receptacle;

the first magnetizer is arranged in the contact cavity and is connected with the movable piece;

a movable member movably disposed in the contact chamber, the movable member including a movable spring for contacting or separating from a pair of stationary contact leading-out ends, the first magnetizer being disposed on a side of the movable spring facing the stationary contact leading-out ends; and

the fixed magnetizer is fixedly arranged in the contact container; the fixed magnetizer is arranged at one side of the first magnetizer, which is opposite to the movable spring;

the first magnetizer is movable relative to the movable member through the movable piece and is used for adjusting the distance between the first magnetizer and the movable member according to the magnitude of the current value flowing through the movable spring.

According to some embodiments of the utility model, the first magnetizer is moved between a first position and a second position by the movable member;

In the first position, a distance between the first magnetizer and the movable member is a first pitch, and in the second position, a distance between the first magnetizer and the movable member is a second pitch, and the first pitch is larger than the second pitch.

According to some embodiments of the utility model, in the second position, the second spacing between the first magnetizer and the movable member is equal to zero.

According to some embodiments of the utility model, the first magnetizer is located at the first position, and a current value of the moving spring is less than or equal to a threshold current;

when the current value flowing through the movable spring is larger than the threshold current, the first magnetizer moves from the first position to the second position.

According to some embodiments of the utility model, the relay further comprises:

and the first elastic piece is used for providing elastic force for the movable piece so that the first magnetizer has a trend of moving away from the movable component.

According to some embodiments of the utility model, the fixed magnetizer has a first side surface facing the movable member and a second side surface disposed opposite the first side surface;

The first elastic piece is arranged on the second side surface, the first magnetizer and the movable component are arranged on the first side surface, and the first magnetizer is arranged between the first elastic piece and the movable component;

one end of the movable piece is connected with the first elastic piece, and the other end of the movable piece is connected with the first magnetizer.

According to some embodiments of the utility model, the fixed magnetizer has a first perforation that extends through the first side surface and the second side surface;

the movable piece is rod-shaped and movably penetrates through the first perforation.

According to some embodiments of the utility model, the first elastic member has a second perforation corresponding to the first perforation;

the movable piece is arranged through the first perforation and the second perforation.

According to some embodiments of the utility model, the movable member includes a rod body and a pressing cap disposed at one end of the rod body, the rod body is disposed through the first through hole and the second through hole, and the pressing cap presses the periphery of the second through hole on a side facing away from the first magnetizer.

According to some embodiments of the utility model, the first magnetizer is provided with a third perforation corresponding to the positions of the first perforation and the second perforation, and the rod body sequentially penetrates through the second perforation, the first perforation and the third perforation;

The periphery of the rod body is provided with a step structure, one end of the rod body, which faces the movable component, is fixedly connected with the first magnetizer, and the step structure is abutted with the periphery of the third through hole, which faces one side of the first elastic piece.

According to some embodiments of the utility model, the first magnetizer is moved between a first position and a second position by the movable member; in the first position, a distance between the first magnetizer and the movable member is a first pitch, and in the second position, a distance between the first magnetizer and the movable member is a second pitch, the first pitch being greater than the second pitch;

in the first position, the first magnetizer is abutted with the first side surface, and one end of the movable piece is abutted against the first elastic piece, so that the first elastic piece has elastic pre-compression.

According to some embodiments of the utility model, the first magnetizer, the fixed magnetizer and the first elastic member are all arranged between a pair of the stationary contact leading-out ends.

According to some embodiments of the utility model, the first resilient element comprises a leaf spring or a spring.

According to some embodiments of the utility model, the moving direction of the first magnetizer relative to the movable member is a contact-separation direction along the movable spring and the stationary contact leading-out end.

According to some embodiments of the utility model, the movable member is movably disposed at a side of the movable member facing the stationary contact leading-out ends, and the movable member is disposed between a pair of the stationary contact leading-out ends.

According to some embodiments of the utility model, the moveable member is made of a metallic material.

According to some embodiments of the utility model, the fixed magnetizer is fixedly connected to the contact receptacle by a connector.

According to some embodiments of the present utility model, the contact container includes an insulating cover and a yoke plate, the insulating cover being connected to the yoke plate to form the contact chamber, a pair of the first through holes being opened to the insulating cover;

the fixed magnetizer is fixedly connected to the insulating cover through the connecting piece.

According to some embodiments of the utility model, the connector is in a rod or cylindrical structure; one axial end of the connecting piece is connected with the insulating cover, and the other axial end of the connecting piece is connected with the fixed magnetizer.

According to some embodiments of the utility model, one end of the connecting piece is connected to the fixed magnetizer, and the other end is connected to a side of the yoke plate facing the stationary contact leading-out end.

According to some embodiments of the utility model, the insulating cover includes a ceramic cover and a frame piece, the ceramic cover being connected to the yoke plate through the frame piece; the pair of first through holes are formed in the ceramic cover;

the fixed magnetizer is fixedly connected to the ceramic cover through the connecting piece.

According to some embodiments of the utility model, the moveable member is movably mounted on the fixed magnetizer.

According to some embodiments of the utility model, the movable member further comprises:

the second magnetizer is fixedly connected to one side of the movable spring, which is away from the first magnetizer, and the second magnetizer is used for forming a magnetic conduction loop with the first magnetizer.

According to some embodiments of the utility model, the first magnetic conductor and/or the fixed magnetic conductor comprises a plurality of stacked magnetic conductive sheets.

One embodiment of the above utility model has at least the following advantages or benefits:

According to the relay provided by the embodiment of the utility model, the first magnetizer is movable relative to the movable component through the movable component, so that the magnitude of the magnetic attraction generated between the first magnetizer and the movable component can be adjusted according to the magnitude of the current value of the flow movable spring, and the requirements of overload breaking and short circuit resistance can be met.

When short-circuit current flows through the movable spring, a large repulsive force is generated between the fixed magnetizer and the first magnetizer, and the repulsive force drives the first magnetizer to move towards the movable component more quickly, so that the distance between the first magnetizer and the movable component is shortened more quickly, a large magnetic attraction force is generated between the first magnetizer and the movable component to resist electric repulsive force generated between the movable spring and the fixed contact leading-out end due to the short-circuit current, and the short-circuit resistance is effectively improved. Therefore, the first magnetizer is subjected to the magnetic attraction force applied by the movable component and the repulsive force applied by the fixed magnetizer, the response time of the movement of the first magnetizer is effectively shortened under the combined action of the two forces, and the reliability of short circuit resistance is improved. Meanwhile, when short-circuit current flows through the movable spring, suction force is generated between the fixed magnetizer and the movable member, suction force is generated between the first magnetizer and the movable member, and resultant force is formed by the two suction forces, so that the short-circuit resistance is further improved.

Drawings

Fig. 1 shows an exploded view of a relay according to a first embodiment of the present utility model.

Fig. 2 shows a schematic perspective view of a relay according to a first embodiment of the utility model, in which the housing, the electromagnet unit and the arc extinguishing unit are omitted.

Fig. 3 shows a schematic top view of a relay according to a first embodiment of the utility model, wherein the housing, the electromagnet unit and the arc extinguishing unit are omitted.

Fig. 4 shows an exploded view of fig. 2.

Fig. 5 shows a cross-sectional view of A-A of fig. 3, with the first magnetizer in a first position.

Fig. 6 shows a cross-sectional view of B-B of fig. 3, with the first magnetizer in a first position.

Fig. 7 shows a partial enlarged view at X1 in fig. 6.

Fig. 8 shows a cross-sectional view of A-A of fig. 3, with the first magnetizer in the second position.

Fig. 9 shows a cross-sectional view of B-B of fig. 3, with the first magnetizer in the second position.

Fig. 10 shows a partial enlarged view at X2 in fig. 9.

Fig. 11 is a schematic view showing the first magnetizer, the fixed magnetizer, the first elastic member, and the movable member assembled according to an embodiment of the present utility model.

Fig. 12 shows an exploded view of fig. 11.

Fig. 13 is a schematic view showing an assembled first magnetizer, a fixed magnetizer, a first elastic member and a movable member according to another embodiment of the present utility model.

Fig. 14 shows an exploded view of fig. 13.

Fig. 15 is a perspective view of a relay according to a second embodiment of the present utility model, in which a housing, an electromagnet unit, and an arc extinguishing unit are omitted.

Fig. 16 shows a schematic top view of a relay according to a second embodiment of the utility model, wherein the housing, the electromagnet unit and the arc extinguishing unit are omitted.

Fig. 17 shows an exploded view of fig. 15.

Fig. 18 is a perspective view showing the assembled fixed magnetizer, the connecting piece and the yoke plate.

Fig. 19 shows a cross-sectional view of C-C of fig. 16 with the first magnetizer in a first position.

Fig. 20 shows a cross-sectional view of C-C of fig. 16 with the first magnetizer in the second position.

Fig. 21 is a perspective view of a relay according to a third embodiment of the present utility model, in which a housing, an electromagnet unit, and an arc extinguishing unit are omitted.

Fig. 22 shows a schematic top view of a relay according to a third embodiment of the utility model, in which the housing, the electromagnet unit and the arc extinguishing unit are omitted.

Fig. 23 shows an exploded view of fig. 21.

Fig. 24 is a cross-sectional view of D-D of fig. 22, with the first magnetizer in a first position.

Fig. 25 shows an exploded view of a relay according to a fourth embodiment of the present utility model, in which a housing, an electromagnet unit, and an arc extinguishing unit are omitted.

Fig. 26 shows an exploded view of a relay according to a fifth embodiment of the present utility model, in which a housing, an electromagnet unit, and an arc extinguishing unit are omitted.

Fig. 27 is an exploded view of a relay according to a sixth embodiment of the present utility model, in which a housing, an electromagnet unit, and an arc extinguishing unit are omitted.

Fig. 28 shows an exploded view of a relay according to a seventh embodiment of the present utility model, in which a housing, an electromagnet unit, and an arc extinguishing unit are omitted.

Fig. 29 is a schematic view showing the first magnetizer, the fixed magnetizer, the first elastic member, and the movable member of fig. 28 assembled.

Fig. 30 shows an exploded view of fig. 29.

Wherein reference numerals are as follows:

10. a contact vessel; 101. a contact chamber; 102. a first through hole; 103. a third through hole;

11a, an insulating cover; 11. a ceramic cover; 12. a frame piece; 13. a yoke plate; 131. a second through hole; 20. a stationary contact lead-out end;

30. An accommodation space;

40. a first magnetizer; 410. a first magnetic conductive sheet; 420. a third perforation;

50. a push rod assembly; 51. a stem portion; 52. a base; 53. a movable member; 54. a moving spring; 55. a second magnetizer; 56. a second elastic member; 57. a sliding structure; 571. a limit part; 572. a limiting hole;

610. a connecting piece; 611. an insertion portion; 612. a flange; 620. fixing a magnetizer; 621. a first side surface; 622. a second side surface; 623. a first perforation; 624. a second magnetic conductive sheet;

70. a first elastic member; 701. avoiding the notch; 710. an elastic reed; 711. a second perforation; 720. a spring; 730. tabletting;

80. a movable member; 810. pressing the cap; 820. a rod body; 821. a step structure;

1100. a housing; 1110. a first housing; 1120. a second housing; 1130. exposing the hole;

1200. an electromagnet unit; 1210. a coil former; 1220. a coil; 1230. a stationary core; 1231; a through hole; 1240. a movable iron core; 1250. a reset member;

1300. an arc extinguishing unit; 1310. An arc extinguishing magnet; 1320. A yoke iron clip;

1400. a sealing unit; 1410. A metal cover;

p1, a first position; p2, second position

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many 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 the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

As shown in fig. 1, the relay of the embodiment of the present utility model includes a housing 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 exposing hole 1130 of the housing 1100. The electromagnet unit 1200 and the arc extinguishing unit 1300 are both disposed within the housing 1100.

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

As an example, the case 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 serves to extinguish an arc generated between the stationary contact leading-out terminal and the moving spring of the sealing unit 1400.

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 be substantially rectangular parallelepiped. The two arc extinguishing magnets 1310 are disposed at both sides of the sealing unit 1400, respectively, and are disposed opposite to each other along the length direction of the moving spring.

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

The arc extinguishing unit 1300 further includes two yoke clamps 1320, and the two yoke clamps 1320 are disposed corresponding to the positions of the two arc extinguishing magnets 1310. And, two yoke clips 1320 surround the sealing unit 1400 and the two arc extinguishing magnets 1310. Through yoke clamp 1320, the design of encircling arc extinguishing magnet 1310 can avoid the outward diffusion of the magnetic field that arc extinguishing magnet 1310 produced, influence the arc extinguishing effect. The yoke iron clamp 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. 2 to 4, the sealing unit 1400 of the embodiment of the present utility model includes a contact case 10, a pair of stationary contact terminals 20, a push rod assembly 50, a first magnetizer 40, a movable member 80, a fixed magnetizer 620, and a first elastic member 70.

It will be appreciated that the contact receptacle 10 is a stationary member for receiving a contact assembly and is a housing-based, chamber-like device. Further, the contact container 10 may be formed by connecting a plurality of components in a predetermined assembly manner.

The contact vessel 10 has a contact chamber 101 inside. The contact container 10 may include an insulation cover 11a and a yoke plate 13, the insulation cover 11a being covered on one side surface of the yoke plate 13, the insulation cover 11a and the yoke plate 13 being jointly surrounded to form the 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 12 may be a metal member having a ring-shaped structure, such as an iron-nickel alloy, and one end of the frame 12 is connected to the opening edge of the ceramic cover 11, for example, by laser welding, brazing, resistance welding, gluing, or the like. The other end of the frame piece 12 is connected to the yoke plate 13, and the other end may be welded by laser, soldering, resistance welding, or adhesive bonding. 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 contact vessel 10 also has a pair of first through holes 102, the first through holes 102 communicating with the contact chamber 101. The first through hole 102 is used for the stationary contact leading-out terminal 20 to pass through. In the embodiment of the present utility model, the first through hole 102 is formed on the ceramic cover 11.

A pair of stationary contact terminals 20 are connected to the ceramic housing 11 of the contact vessel 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 through which current flows, and the other serves as a terminal through 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 ceramic cap 11, for example, by soldering.

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

As shown in fig. 4, the push rod assembly 50 is movably connected to the contact vessel 10 in the axial direction of the rod. The push rod assembly 50 may include a rod portion 51, a base 52, a movable member 53, and a second elastic member 56.

The yoke plate 13 has second through holes 131 penetrating through both opposite side surfaces of the yoke plate 13 in the thickness direction of the yoke plate 13, and the second through holes 131 communicate with the contact chamber 101 of the contact case 10. The rod 51 is axially movably inserted through the second through hole 131. The axial end of the stem 51 is provided with a seat 52, at least part of the seat 52 being located in the contact chamber 101.

The movable member 53 is movably connected to the base 52 along the axial direction of the lever portion 51. The movable member 53 includes a movable spring 54 and a second magnetizer 55. The second magnetizer 55 is fixedly connected with the movable spring 54, and the second magnetizer 55 is positioned at one side of the movable spring 54, which is away from the first magnetizer 40, and the second magnetizer 55 is used for forming a magnetic conduction loop with the first magnetizer 40. The two ends of the moving spring 54 are used for contacting with the bottoms of the pair of stationary contact terminals 20 to realize contact closure. The movable spring 54 includes a movable spring and movable contacts provided at both ends of the movable spring in the longitudinal direction. The movable contact point can be protruded from the movable reed or can be flush with the movable reed.

It is understood that the movable contact may be integrally or separately provided at both ends of the movable spring.

The second elastic piece 56 is connected to the movable member 53 and the base 52 for applying an elastic force to the movable member 53 for moving toward the stationary contact terminal 20.

The push rod assembly 50 further includes a sliding structure 57, the sliding structure 57 being coupled to the base 52 and the movable member 53, the movable member 53 being slidable relative to the base 52 through the sliding structure 57. The sliding structure 57 includes a limit hole 572 and a limit part 571 that are engaged. The stopper 571 slidably extends into the stopper hole 572.

In the embodiment of the present utility model, the base 52 is directly connected to the movable member 53 through the limiting structure 57, so that the assembly between the base 52 and the movable member 53 is simpler. Further, since no other part exists between the movable member 53 and the first magnetizer 40, the other part is prevented from being in motion interference with the first magnetizer 40 during the over-stroke.

It is understood that the limiting hole 572 may be a through hole or a blind hole.

As an example, the base 52 is provided with a stopper hole 572, and the movable member 53 is provided with a stopper 571.

Of course, in other embodiments, the push rod assembly 50 may be of other construction known in the art and will not be discussed in detail herein.

As shown in fig. 4 to 6, the sealing unit 1400 further includes a metal cap 1410, the metal cap 1410 is connected to a side of the yoke plate 13 facing away from the insulating cap 11a, and the metal cap 1410 is provided to cover the second through hole 131 in the yoke plate 13. The metal cover 1410 encloses a chamber with the yoke plate 13 for accommodating the stationary core 1230 and the movable core 1240 of the electromagnet unit 1200.

The electromagnet unit 1200 includes a bobbin 1210, a coil 1220, a stationary core 1230, a movable core 1240, and a reset element 1250. The bobbin 1210 has a hollow cylindrical shape and is formed of an insulating material. The metal cover 1410 is penetrated inside the coil holder 1210. The coil 1220 surrounds the bobbin 1210. The stationary core 1230 is fixedly disposed in the metal cap 1410, and a portion of the stationary core 1230 extends into the second through hole 131. The stationary core 1230 has a through hole 1231, and the through hole 1231 is provided corresponding to the position of the second through hole 131 for the shaft 51 to pass therethrough. The movable iron core 1240 is movably disposed within the metal cover 1410 and is disposed opposite the stationary iron core 1230, with the movable iron core 1240 connecting rod portion 51 for being attracted by the stationary iron core 1230 when the coil 1220 is energized. Plunger 1240 and shaft 51 may be threaded, riveted, welded, or otherwise connected.

The resetting member 1250 is positioned inside the metal cover 1410 and is disposed between the stationary core 1230 and the movable core 1240 for resetting the movable core 1240 when the coil 1220 is de-energized. The restoring member 1250 may be a spring and is sleeved outside the lever portion 51.

When the coil 1220 is energized, the electromagnet unit 1200 can drive the push rod assembly 50 to move upward through the rod portion 51. When the movable member 53 contacts the stationary contact outlet 20, the movable member 53 is stopped by the stationary contact outlet 20, and the lever 51 and the base 52 continue to move upward until the over-stroke is completed.

With continued reference to fig. 4-6, the first magnetizer 40 is disposed in the contact chamber 101, and the first magnetizer 40 is disposed on a side of the movable spring 54 facing the stationary contact outlet 20. The fixed magnetizer 620 is fixedly disposed in the contact vessel 10, and the fixed magnetizer 620 may be fixedly connected to the insulating cover 11a of the contact vessel 10 through the connector 610. The movable member 80 is movably mounted to the fixed magnetizer 620. The first magnetizer 40 is provided in the contact chamber 101 and connected to the movable element 80, and the first magnetizer 40 is movable with respect to the movable member 53 by the movable element 80. The first magnetizer 40 and the fixed magnetizer 620 are both arranged on one side of the movable spring 54 of the movable member 53 facing the fixed contact point lead-out end 20, and the fixed magnetizer 620 is arranged on one side of the first magnetizer 40 facing away from the movable spring 54, so as to generate repulsive force with the first magnetizer 40 when the movable spring 54 of the movable member 53 is used for current. Meanwhile, the fixed magnetizer 620 also serves to generate suction with the movable member 53.

In the embodiment of the utility model, the limiting portion 571 may be disposed on the second magnetizer 55, but not limited thereto.

As an example, the second magnetizer 55 and the movable spring 54 may be fixedly connected by a rivet, but not limited thereto.

It is understood that the first magnetizer 40, the fixed magnetizer 620, and the second magnetizer 55 can be made of magnetic conductive materials such as iron, cobalt, nickel, and alloys thereof.

In one embodiment, the first magnetizer 40 and the second magnetizer 55 may be in a shape of a letter or a U, but not limited thereto. The fixed magnetizer 620 may be a linear type, but is not limited thereto.

When both ends of the moving spring 54 are in contact with the pair of stationary contact leading-out ends 20, the second magnetizer 55 moving together with the moving spring 54 approaches or contacts the first magnetizer 40, thereby forming a magnetic conductive circuit around the moving spring 54 between the first magnetizer 40 and the second magnetizer 55. When the short-circuit current passes through the movable spring 54, a magnetic attraction force is generated between the first magnetizer 40 and the second magnetizer 55 along the contact pressure direction, and the magnetic attraction force can resist an electric repulsive force generated between the movable spring 54 and the stationary contact leading-out end 20 due to the short-circuit current, so that the movable spring 54 and the stationary contact leading-out end 20 are ensured not to spring open.

It should be noted that, the first magnetizer 40 and the second magnetizer 55 are respectively located at two sides of the movable spring 54, and when the movable spring 54 is energized, the magnetic attraction between the first magnetizer 40 and the second magnetizer 55 is direct electromagnetic attraction, so that the electric repulsive force generated by the short-circuit current between the movable spring 54 and the stationary contact leading-out terminal 20 can be resisted more forcefully, and the short-circuit resistance is effectively improved.

In addition, since the fixed magnetizer 620 and the second magnetizer 55 are respectively located at two sides of the movable spring 54, after the movable spring 54 is electrified, a magnetic conduction loop is also formed between part of the fixed magnetizer 620 and the second magnetizer 55, so that a magnetic attraction force along the contact pressure direction is generated between part of the fixed magnetizer 620 and the second magnetizer 55, which is beneficial to improving the short-circuit resistance.

As described above, the magnetic attraction force along the contact pressure direction is generated between the first magnetizer 40 and the fixed magnetizer 620 and the second magnetizer 55, and the attraction force between the first magnetizer 40 and the second magnetizer 55 and the attraction force between the fixed magnetizer 620 and the second magnetizer 55 form a resultant force, which can further resist the electric repulsive force generated between the moving spring 54 and the stationary contact leading-out end 20 due to the short circuit current, so as to ensure that the moving spring 54 and the stationary contact leading-out end 20 do not spring, and improve the short circuit resistance.

It will be appreciated that when the current value flowing through the moving spring 54 is constant, the magnitude of the magnetic attraction force generated between the first magnetizer 40 and the second magnetizer 55 is inversely proportional to the distance between the first magnetizer 40 and the second magnetizer 55 of the movable member 53, and the smaller the distance, the larger the magnetic attraction force generated.

If the moving spring 54 and the stationary contact terminal 20 are prevented from bouncing off in order to resist the electromotive repulsive force generated by the short-circuit current, the distance between the first magnetizer 40 and the second magnetizer 55 should be designed to be small, so that the magnetic attraction between the first magnetizer 40 and the second magnetizer 55 can be increased.

If the timely breaking is to be realized, the distance between the first magnetizer 40 and the second magnetizer 55 is preferably designed to be larger, so that the magnitude of the magnetic attraction between the first magnetizer 40 and the second magnetizer 55 is reduced, and the influence of the excessive magnetic attraction on the timely breaking is avoided.

It can be seen that the short-circuit resistance and the limit breaking ability cannot be simultaneously achieved when the distance between the first magnetizer 40 and the second magnetizer 55 is a certain value.

In the embodiment of the present utility model, the first magnetizer 40 is movable relative to the movable member 53 by the movable element 80, and the distance between the first magnetizer 40 and the second magnetizer 55 is adjusted according to the magnitude of the current value flowing through the movable spring 54, so as to achieve both the short-circuit resistance capability and the limit breaking capability.

Further, as shown in fig. 6, since the fixed magnetizer 620 is provided on the side of the first magnetizer 40 facing away from the movable member 53, when the movable spring 54 of the movable member 53 passes the current, the direction of the magnetic induction lines flowing through the fixed magnetizer 620 and the first magnetizer 40 is the same (as shown by a broken line in fig. 6), and a repulsive force is generated between the fixed magnetizer 620 and the first magnetizer 40 in the contact-contact separation direction according to the principle of the repulsive force of the same magnetic induction lines. Since the fixed magnetizer 620 is fixedly disposed with respect to the contact receptacle 10 and the first magnetizer 40 is movable by the movable member 80, the fixed magnetizer 620 generates a repulsive force to the first magnetizer 40, which urges the first magnetizer 40 to move toward the movable member 53.

It will be appreciated that the magnitude of the repulsive force generated between the fixed magnetizer 620 and the first magnetizer 40 is proportional to the magnitude of the current value of the flow spring 54. Therefore, when the short-circuit current flows through the moving spring 54, a large repulsive force is generated between the fixed magnetizer 620 and the first magnetizer 40, and the repulsive force drives the first magnetizer 40 to move toward the movable member 53 rapidly, so as to shorten the distance between the first magnetizer 40 and the movable member 53 rapidly, so that a large magnetic attraction force is generated between the first magnetizer 40 and the movable member 53 to resist the electric repulsive force generated between the moving spring 54 and the fixed contact leading-out terminal 20 due to the short-circuit current, and the short-circuit resistance is effectively improved.

Therefore, when the short-circuit current flows through the moving spring 54, the first magnetizer 40 receives both the magnetic attraction force applied by the movable member 53 and the repulsive force applied by the fixed magnetizer 620, and under the combined action of the two forces, the response time of the movement of the first magnetizer 40 is effectively shortened, and the reliability of short-circuit resistance is improved.

As shown in fig. 5 to 10, the first magnetizer 40 is moved between the first position P1 and the second position P2 by the movable member 80. In the first position P1, the distance between the first magnetizer 40 and the second magnetizer 55 is the first pitch H1. In the second position P2, the distance between the first magnetizer 40 and the second magnetizer 55 is a second distance H2, and the first distance H1 is greater than the second distance H2. By arranging the first magnetizer 40 to be movable, the distance between the first magnetizer 40 and the second magnetizer 55 can be adjusted according to the magnitude of the current value, and the magnitude of the magnetic attraction generated between the first magnetizer 40 and the second magnetizer 55 can be changed, so that both short-circuit current resistance and limit breaking can be considered.

As an example, in the second position P2, the second distance H2 between the first magnetizer 40 and the second magnetizer 55 is equal to zero. That is, in the second position P2, the first magnetizer 40 and the second magnetizer 55 are in contact with each other. This maximizes the magnetic attraction between the first and second magnetic conductors 40, 55 to improve the short circuit resistance.

Of course, in other embodiments, the second distance H2 between the first magnetizer 40 and the second magnetizer 55 may be different from zero in the second position P2. That is, in the second position P2, the first magnetizer 40 and the second magnetizer 55 are not in contact, but a gap exists.

The first elastic member 70 serves to provide an elastic force to the movable member 80 such that the first magnetizer 40 has a tendency to move in a direction away from the movable member 53. In the embodiment of the present utility model, the first elastic member 70 is configured to provide an elastic force to the movable member 80, so that the first magnetizer 40 has a tendency to move toward the first position P1.

It will be appreciated that when the relay is in the normal operating condition, the first elastic member 70 provides an elastic force to the movable member 80, so that the first magnetizer 40 has a tendency to move away from the movable member 53, and thus the distance between the first magnetizer 40 and the movable member 53 is relatively large, and the magnetic attraction between the first magnetizer 40 and the movable member 53 is not large, so that the timely breaking of the movable spring 54 from the stationary contact outlet 20 is not affected.

In addition, when the relay is in the normal working condition, the current value flowing through the movable spring 54 is far smaller than the short circuit, so that the repulsive force between the fixed magnetizer 620 and the first magnetizer 40 is not great, and the condition that the fixed magnetizer 620 drives the first magnetizer 40 to move towards the movable member 53 under the normal working condition does not occur.

In combination, the elastic pre-stress of the first elastic member 70 is sufficient to overcome the sum of the repulsive force applied to the first magnetizer 40 by the fixed magnetizer 620 and the magnetic attractive force applied to the first magnetizer 40 by the movable member 53 when the relay is in the normal operation, so that the first magnetizer 40 can be maintained at the first position P1 under the normal operation.

The following describes how the embodiment of the present utility model combines the short-circuit current resistance and the limit breaking with each other with reference to fig. 5 to 10.

As shown in fig. 5 to 7, the relay is in a normal operation state, and the current value flowing through the moving spring 54 is less than or equal to a threshold current, for example, the current value is less than 2000A. Since the current value is smaller at this time, the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 is smaller, the repulsive force between the fixed magnetizer 620 and the first magnetizer 40 is smaller, and the sum of the repulsive force and the magnetic attraction force is smaller than the magnitude of the elastic pre-compression force of the first elastic member 70 at this time, so that the elastic force of the first elastic member 70 can cancel the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 and the repulsive force between the fixed magnetizer 620 and the first magnetizer 40, and keep the first magnetizer 40 at the first position P1. When the first magnetizer 40 is located at the first position P1, a distance between the first magnetizer 40 and the second magnetizer 55 is a first distance H1. For example, the first pitch H1 may be 1.5mm, but is not limited thereto.

It will be appreciated that the magnitude of the threshold current described above may be adjusted for different types of relays. For example: if the maximum breaking current of the relay is large, the threshold current may be set large, so that it is ensured that the first magnetizer 40 still remains in the first position P1 and does not move to the second position P2 in the normal operation state of the relay.

As shown in fig. 8 to 10, when the current value flowing through the moving spring 54 is greater than the threshold current, for example, the current is greater than 2000A, and since the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 and the repulsive force between the fixed magnetizer 620 and the first magnetizer 40 are both proportional to the magnitude of the current value, the greater the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 and the repulsive force between the fixed magnetizer 620 and the first magnetizer 40. When the sum of the magnetic attraction force and the repulsive force is larger than the elastic pre-compression force of the first elastic member 70, the first magnetizer 40 is attracted by the magnetic attraction force and is pushed down by the repulsive force to move in a direction approaching the second magnetizer 55 (i.e., move from the first position P1 to the second position P2), so that the distance between the first magnetizer 40 and the second magnetizer 55 becomes smaller. And the magnitude of the magnetic spacing is inversely proportional to the magnitude of the magnetic attraction force, namely, the smaller the magnetic spacing is, the larger the magnetic attraction force is. When a short-circuit current (much larger than the threshold current) flows, a larger magnetic attraction force is generated between the first magnetizer 40 and the second magnetizer 55, and a larger repulsive force is generated between the first magnetizer 40 and the fixed magnetizer 620, and the magnetic attraction force and the repulsive force can jointly compress the first elastic member 70 to move the first magnetizer 40 to the second position P2, and at this time, the distance between the first magnetizer 40 and the second magnetizer 55 is the second distance H2. The second pitch H2 is smaller than the first pitch H1, and the pitch becomes smaller, so that the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 becomes larger. Therefore, the first magnetizer 40 can attract the second magnetizer 55 by the larger magnetic attraction force, and the magnetic attraction force can resist the electric repulsive force generated by the short-circuit current, so that the movable spring 54 is ensured not to be sprung away from the stationary contact leading-out end 20, and the short-circuit resistance is realized.

Therefore, in the relay according to the embodiment of the utility model, the first magnetizer 40 is movably arranged in the contact container 10 through the movable piece 80, so that the distance between the first magnetizer 40 and the second magnetizer 55 can be adjusted according to the magnitude of the current value, and the magnitude of the magnetic attraction generated between the first magnetizer 40 and the second magnetizer 55 can be changed, thereby meeting the requirements of short circuit resistance and overload breaking.

It should be noted that, when the first magnetizer 40 moves from the first position P1 to the second position P2, the first elastic member 70 is gradually compressed, so that the reverse elastic force exerted by the first elastic member 70 on the movable member 80 is gradually increased. When the current value flowing through the movable spring 54 is larger than the threshold current but the short-circuit current is not yet reached, the gradually increasing reverse elastic force keeps the first magnetizer 40 at a certain intermediate position between the first position P1 and the second position P2. When the current value flowing through the moving spring 54 reaches the short-circuit current, a larger magnetic attraction force is generated between the first magnetizer 40 and the second magnetizer 55, and the magnetic attraction force is enough to overcome the reverse elastic force of the first elastic member 70, so that the first magnetizer 40 continues to move towards the second position P2 and continues to compress the first elastic member 70 until the first magnetizer 40 moves to the second position P2.

In addition, when the first magnetizer 40 is at the first position P1, the distance between the first magnetizer 40 and the fixed magnetizer 620 is small or abuts against each other. At this time, when the current value flowing through the moving spring 54 is greater than the threshold current, since the distance between the first magnetizer 40 and the fixed magnetizer 620 is small, a large repulsive force is generated between the first magnetizer 40 and the fixed magnetizer 620, and the repulsive force can rapidly drive the first magnetizer 40 to start moving, so that the response time of the movement of the first magnetizer 40 is shortened, and the reliability of short circuit resistance is improved.

Referring back to fig. 4 to 6 and 8, the fixed magnetizer 620 is connected to the contact container 10 through two connecting members 610, one end of the two connecting members 610 is connected to the contact container 10, and the other end of the two connecting members 610 is connected to the fixed magnetizer 620. The fixed magnetizer 620 may have a plate-like structure and be disposed in parallel with the yoke plate 13.

It will be appreciated that the fixed magnetizer 620 is connected to the contact receptacle 10 by the connector 610, so that the magnetic attraction force for resisting short circuit is transferred to the contact receptacle 10, and since the contact receptacle 10 is a stationary component, excessive coil holding force is not required, thereby reducing the power consumption of the coil of the relay and the volume of the relay, and improving the short circuit resistance.

The fixed magnetizer 620 has a first side surface 621 facing the yoke plate 13 and a second side surface 622 disposed opposite to the first side surface 621. The first elastic piece 70 is provided on the second side surface 622, the first magnetizer 40 and the movable member 53 are provided on the first side surface 621, and the first magnetizer 40 is provided between the first elastic piece 70 and the movable member 53. One end of the movable member 80 is connected to the first elastic member 70, and the other end is connected to the first magnetizer 40. The first magnetizer 40, the first elastic member 70, and the fixed magnetizer 620 are all located on the side of the movable spring 54 facing the stationary contact terminal 20.

When the first magnetizer 40 is at the first position P1, the first magnetizer 40 abuts against the first side surface 621 of the fixed magnetizer 620. When the first magnetizer 40 is in the second position P2, the first magnetizer 40 is disengaged from the fixed magnetizer 620.

The connecting member 610 has a rod shape, one axial end of the connecting member 610 is fixedly connected to the ceramic cap 11 of the insulating cap 11a, and the other axial end of the connecting member 610 is connected to the fixed magnetizer 620.

In the embodiment of the present utility model, the top wall of the ceramic cover 11 contacting the container 10 is provided with a third through hole 103, and the connecting piece 610 is disposed through the third through hole 103. The connection manner of the axial end of the connection member 610 to the ceramic cover 11 may have various embodiments, such as welding, riveting, screwing, bonding, etc. The other end of the connector 610 may be coupled to the fixed magnetic conductor 620 by various means, such as welding, riveting, screwing, bonding, clamping, etc.

It can be understood that when the connection mode between one end of the connecting piece 610 and the ceramic cover 11 is welding, by welding the connecting piece 610 on the top wall of the ceramic cover 11, the metalized layer can be processed only on the periphery of the third through hole 103 on the outer wall surface of the top wall, and the metalized layer does not need to be processed on the inner wall surface of the top wall, so that the processing is convenient and the processing steps are simplified.

It is understood that one end of the connection member 610 may be connected to the outer wall surface of the ceramic cap 11, may be connected to the inner wall surface of the ceramic cap 11, or may be connected to both the outer wall surface and the inner wall surface of the ceramic cap 11.

In the embodiment of the utility model, one end of the connecting member 610 is connected to the periphery of the third through hole 103 of the ceramic cover 11.

It will be appreciated that the fixed magnetic conductor 620 is connected to the ceramic housing 11 by the connector 610, on the one hand, the magnetic attraction force against short circuit is transferred to the ceramic housing 11, so that excessive coil holding force is not required, thereby reducing the power consumption of the coil of the relay and the volume of the relay, and improving the short circuit resistance. On the other hand, since the connection to the ceramic cover 11 does not occupy the space of the contact chamber excessively, the arc extinguishing space of the arc extinguishing unit 1300 and the movable space of the push rod assembly 50 are ensured.

In addition, the fixed magnetizer 620 is connected with the rod-shaped connecting piece 610, so that various connecting modes, such as riveting, laser welding, clamping, cementing and the like, can be adopted between the fixed magnetizer 620 and the connecting piece 610, and the connecting modes are enriched.

As an example, the connector 610 is a solid rod. In this way, the connecting member 610 and the fixed magnetizer 620 can be connected by riveting, so that the connection is more reliable. In addition, the solid rod has higher supporting strength and is less easy to deform.

The movable member 80 may be in various embodiments, for example, the movable member 80 may be in a column shape, one end of the movable member 80 and the first elastic member 70 may be connected by welding, riveting, screwing, bonding, etc., and the other end of the movable member 80 and the first magnetizer 40 may also be connected by welding, riveting, screwing, bonding, etc. As a variant embodiment, the movable member 80 may also have an inverted U shape, wherein the top of the inverted U-shaped structure is connected to the first elastic member 70, and two sides of the inverted U-shaped structure are respectively connected to two sides of the first magnetizer 40.

As an example, the fixed magnetizer 620 is suspended from the top wall of the ceramic hood 11 by two connectors 610. Meanwhile, the number of the movable members 80 may be two, but is not limited thereto. The two connectors 610 may be connected to the inner wall surface of the top wall of the ceramic cover 11 or may be connected to the outer wall surface of the top wall of the ceramic cover 11.

When the movable member 80 is in a cylindrical shape, the fixed magnetizer 620 has a first through hole 623, and the first through hole 623 penetrates the first side surface 621 and the second side surface 622. The movable member 80 is movably disposed through the through hole 623. In the first position P1, the first magnetizer 40 abuts against the first side surface 621 of the fixed magnetizer 620, and one end of the movable member 80 abuts against the first elastic member 70, so that the first elastic member 70 has an elastic pre-compression force.

It will be appreciated that, on the one hand, the first magnetizer 40 and the first elastic member 70 are respectively disposed on two opposite sides of the fixed magnetizer 620, so that no other component exists between the first magnetizer 40 and the movable member 53, and thus, when a large current flows through the moving spring 54 of the movable member 53, the gap between the first magnetizer 40 and the second magnetizer 55 can be as small as possible, even the first magnetizer 40 contacts with the second magnetizer 55, so that the magnetic attraction between the first magnetizer 40 and the second magnetizer 55 is increased, and the short-circuit resistance is improved. On the other hand, since the first elastic member 70 is disposed at the second side surface 622 of the fixed magnetizer 620 and is not in direct contact with the first magnetizer 40, the magnetic pole surface of the first magnetizer 40 is not affected. In still another aspect, the movable member 80 movably penetrates through the first through hole 623 of the fixed magnetizer 620, and one end of the movable member 80 abuts against the first elastic member 70, and the other end of the movable member 80 is connected with the first magnetizer 40, so that the structure is more compact, the original structure of the relay is not changed, and the internal space of the relay is not occupied. And the structure is simpler, and the assembly is convenient. In addition, the first magnetizer 40 directly acts on the movable member 80, and the movable member 80 is the first through hole 623 penetrating through the fixed magnetizer 620, so that the force arm of the magnetic attraction generated between the first magnetizer 40 and the second magnetizer 55 relative to the fulcrum formed by the movable member 80 and the first elastic member 70 is not large during the movement of the first magnetizer 40, and the stress is small.

As shown in fig. 5, the first elastic member 70 has a second perforation 711 corresponding to the first perforation 623. The movable member 80 is disposed through the first through hole 623 and the second through hole 711. The movable member 80 includes a rod 820 and a pressing cap 810, the pressing cap 810 is disposed at one end of the rod 820, and the pressing cap 810 is used for pressing a periphery of the second through hole 711 on a side facing away from the first magnetizer 40.

In the process that the first magnetizer 40 moves from the first position P1 to the second position P2 under the combined action of the magnetic attraction and the repulsive force, the pressing cap 810 of the movable member 80 presses the first elastic member 70 to compress the first elastic member 70.

It can be appreciated that one end of the movable member 80 may be fixedly connected to the first elastic member 70, or may be movably connected to the first elastic member 70, so that when the first magnetizer 40 moves from the first position P1 to the second position P2, the movable member 80 can apply a force to the first elastic member 70 to compress the first elastic member 70.

The first magnetizer 40 is provided with a third perforation 420, and the third perforation 420 corresponds to the positions of the first perforation 623 and the second perforation 711. The outer periphery of the rod body 820 of the movable member 80 is provided with a step structure 821, and the step structure 821 is used for abutting against the periphery of the third through hole 420 of the first magnetizer 40 facing to the side of the first elastic member 70.

When the movable member 80, the first magnetizer 40, and the first elastic member 70 are assembled, the movable member 80 sequentially passes through the second perforation 711 of the first elastic member 70, the first perforation 623 of the fixed magnetizer 620, and the third perforation 420 of the first magnetizer 40. The step structure 821 of the rod body 820 abuts the periphery of the third through hole 420. The end of the rod body 820 facing the movable member 53 is fixedly connected to the first magnetizer 40, for example, by caulking. The pressing cap 810 presses against the periphery of the second through hole 711.

As shown in fig. 5, the fixed magnetizer 620, the first magnetizer 40, and the first elastic member 70 are all located between the pair of stationary contact terminals 20. In this way, the fixed magnetizer 620, the first magnetizer 40 and the first elastic member 70 do not occupy the volume of the relay in the height direction, and the overall structure of the relay is more compact, which is beneficial to realizing the miniaturization of the volume.

The movable member 80 is movably provided on a side of the movable member 53 facing the stationary contact terminal 20, and the movable member 80 is located between a pair of stationary contact terminals 20.

In one embodiment, the movable member 80 is made of a metal material to improve the connection strength.

As shown in fig. 11 and 12, the first elastic member 70 may be a spring reed 710, so that the space occupied by the spring reed 710 is reduced, and a moving space is provided for the first magnetizer 40.

The second elastic member 56 may also be an elastic reed, which also reduces the space occupied by the second elastic member 56 and provides a moving space for the first magnetizer 40.

The two ends of the elastic reed 710 are provided with avoiding notches 701, and the connecting piece 610 passes through the avoiding notches 701. In the embodiment of the utility model, opposite ends of the first elastic member 70 are provided with the avoiding notches 701, and the two connecting members 610 respectively pass through the avoiding notches 701. By providing the avoidance gap 701 on the first elastic member 70, the connecting member 610 can pass through the first elastic member 70 and be connected with the fixed magnetizer 620, so that the connecting member 610, the fixed magnetizer 620, the first elastic member 70 and the first magnetizer 40 are more compact after being assembled, and the internal space of the relay is not occupied.

Of course, the elastic reed 710 may not be provided with the avoiding notch 701; alternatively, the spring leaf 710 is provided with a hole for the connector 610 to pass through.

As shown in fig. 13 and 14, as a modified embodiment, the first elastic member 70 may also be a spring 720. One end of the spring 720 abuts against the fixed magnetizer 620, and the other end of the spring 720 abuts against a pressing piece 730. One end of the movable member 80 is connected to the pressing piece 730, and is pressed against the other end of the spring 720 by the pressing piece 730, and the other end of the movable member 80 passes through the first through hole 623 of the fixed magnetizer 620 to be connected to the first magnetizer 40.

As shown in fig. 15 to 20, the relay of the second embodiment has substantially the same structure in the basic configuration as the relay of the first embodiment. Therefore, in the following description of the relay of the second embodiment, the structure already described in the first embodiment is not repeated. The same reference numerals are given to the same configurations as those of the relay described in the first embodiment. Therefore, in the following description of the present embodiment, differences from the relay of the first embodiment will be mainly described.

In the present embodiment, the fixed magnetizer 620 is connected to the yoke plate 13 through the connector 610. On the one hand, since the fixed magnetizer 620 is fixed with respect to the yoke plate 13, the magnetic attraction force generated between the first magnetizer 40 and the movable member 53 is transferred to the yoke plate 13, so that an excessive coil holding force is not required, thereby reducing the coil power consumption of the relay and the volume of the relay, and improving the short-circuit resistance. On the other hand, the connection of the connection member 610 with the yoke plate 13 is easier to operate, and the connection strength of the connection member 610 can be improved. On the other hand, the connecting member 610 is connected to the yoke plate 13 without being connected to the insulating cover 11a, so that the opening of the insulating cover 11a can be avoided, the structural strength of the insulating cover 11a can be damaged, and the explosion-proof capability of the insulating cover 11a can be improved.

In the embodiment of the present utility model, the fixed magnetizer 620 is connected to the yoke plate 13 through two connecting pieces 610. One ends of the two connection members 610 are respectively connected to opposite ends of the fixed magnetizer 620, and the other ends of the two connection members 610 are respectively connected to one side surface of the yoke plate 13 facing the stationary contact leading-out terminal 20.

As shown in fig. 18 to 20, the fixed magnetizer 620, the two connecting pieces 610, and the yoke plate 13 form an accommodating space 30, and the movable member 53 and the first magnetizer 40 are movably disposed in the accommodating space 30.

In one embodiment, the fixed magnetizer 620 and the two connecting pieces 610 may be integrally formed and form an inverted U shape. Preferably, the fixed magnetizer 620 is made of magnetically permeable material and each connector 610 is made of magnetically non-permeable material.

Of course, in other embodiments, the fixed magnetizer 620 and the two connecting pieces 610 may be separately connected.

As shown in fig. 21 to 24, the relay of the third embodiment has substantially the same structure in the basic configuration as the relay of the first embodiment. Therefore, in the following description of the relay of the third embodiment, the structure already described in the first embodiment is not repeated. The same reference numerals are given to the same configurations as those of the relay described in the first embodiment. Therefore, in the following description of the present embodiment, differences from the relay of the first embodiment will be mainly described.

In this embodiment, the connection member 610 has a cylindrical structure. The structural strength of the cylindrical structure is softer. When the connecting piece 610 and the fixed magnetizer 620 are connected by riveting, welding or the like, the riveting stress or the welding stress generated between the connecting piece 610 and the fixed magnetizer 620 is transmitted to the connecting part of the connecting piece 610 and the insulating cover 11a through the connecting piece 610 with a cylindrical structure, so that the connecting strength of the connecting piece 610 and the insulating cover 11a is ensured, and the reliability of the product is improved.

As shown in fig. 23 and 24, the connector 610 includes an insertion portion 611 and a flange 612. The insertion portion 611 has a cylindrical structure, the insertion portion 611 is inserted into the third through hole 103, and one end of the insertion portion 611 is connected to the fixed magnetizer 620. The flange 612 protrudes from the outer peripheral surface of the end of the insertion portion 611 away from the fixed magnetizer 620, and the flange 612 is connected to the periphery of the third through hole 103.

The bottom of the cylindrical structure is connected to a fixed magnetizer 620, and a flange 612 extends radially outward of the cylindrical structure from the opening edge of the cylindrical structure.

It is understood that the bottom of the tubular structure may be attached to the second side surface 622 of the fixed magnetizer 620 by welding, riveting, cementing, etc.

As shown in fig. 25 to 27, the relay of the fourth embodiment has substantially the same structure as the relay of the first embodiment in the basic structure, and the relay of the fifth embodiment has substantially the same structure as the relay of the second embodiment in the relay of the sixth embodiment in the basic structure. Therefore, in the following description of the relay of the fourth to sixth embodiments, the structures already described in the first to third embodiments are not repeated. The same reference numerals are given to the same configurations as those of the relays described in the first to third embodiments. Therefore, in the following description of the present embodiment, differences from the relays of the first to third embodiments will be mainly described.

In the relays of the fourth to sixth embodiments, the movable member 53 includes the movable spring 54 without the second magnetizer 55. When both ends of the moving spring 54 are in contact with the pair of stationary contact leading-out ends 20, current passes through the moving spring 54, and thus a magnetic conductive circuit surrounding the moving spring 54 is formed at the outer circumference of the moving spring 54 in the length direction. Because of the existence of the first magnetizer 40, most of the magnetic field of the magnetic conduction loop is concentrated on the first magnetizer 40 and magnetizes the first magnetizer 40, so that magnetic attraction force along the contact pressure direction is generated between the first magnetizer 40 and the moving spring 54 through which current flows, and the magnetic attraction force can resist electric repulsive force generated between the moving spring 54 and the fixed contact leading-out end 20 due to short circuit current, so that the moving spring 54 and the fixed contact leading-out end 20 are ensured not to be sprung.

The first magnetizer 40 is movable relative to the movable spring 54 by the movable element 80, and the distance between the first magnetizer 40 and the movable spring 54 of the movable member 53 is adjusted according to the magnitude of the current value flowing through the movable spring 54, so that the short-circuit resistance and the limit breaking capability are both achieved.

As shown in fig. 28 to 30, the relay of the seventh embodiment has substantially the same structure in the basic structure as the relay of the above embodiment. Therefore, in the following description of the relay of the seventh embodiment, the structure already described in the above embodiment will not be repeated. The same reference numerals are given to the same configurations as those of the relay described in the above embodiment. Therefore, in the following description of the present embodiment, differences from the relay of the above embodiment will be mainly described.

In this embodiment, the first magnetizer 40 may include a plurality of stacked first magnetic-conductive pieces 410. In one aspect, the first magnetic sheet 410 is thinner, can be made of a thinner strip material, has lower material cost, and is easy to operate. On the other hand, the number of the first magnetic conductive sheets 410 can be flexibly adjusted according to the magnitude of the short-circuit current, so as to increase or decrease the thickness of the first magnetic conductor 40.

Each of the first magnetic conductive sheets 410 is provided with a third perforation 420, and after the plurality of first magnetic conductive sheets 410 are stacked, the positions of the plurality of third perforation 420 correspond. The third perforation 420 corresponds to the positions of the first perforation 623 and the second perforation 711. When the movable member 80, the first magnetizer 40, and the first elastic member 70 are assembled, the movable member 80 sequentially passes through the second perforation 711 of the first elastic member 70, the first perforation 623 of the fixed magnetizer 620, and the plurality of third perforation 420 of the first magnetizer 40. The stepped structure 821 of the rod body 820 abuts the circumference of the third penetration hole 420 of the farthest one of the first magnetic conductive pieces 410 from the movable member 53. One end of the rod body 820 facing the movable spring 54 is fixedly coupled, for example by caulking, to the nearest one of the first magnetic conductive pieces 410 among the plurality of first magnetic conductive pieces 410 to the movable member 53.

In the first position P1, the one of the plurality of first magnetic-conductive pieces 410 of the first magnetic conductor 40 that is farthest from the movable member 53 abuts the surface of the first side surface 621 of the fixed magnetic conductor 620. The two adjacent first magnetic conductive sheets 410 may be connected by welding, riveting, cementing, or the like. Of course, two adjacent first magnetic conductive sheets 410 may be in direct contact with each other.

The fixed magnetizer 620 includes a plurality of stacked second magnetic-conductive pieces 624. In one aspect, the second magnetic conductive sheet 624 is thinner, can be made of a thinner strip, has lower material cost, and is easy to operate. On the other hand, the number of the second magnetic conductive sheets 624 can be flexibly adjusted according to the magnitude of the short-circuit current, so as to increase or decrease the thickness of the fixed magnetic conductor 620.

The two adjacent second magnetic conductive sheets 624 can be connected by welding, riveting, cementing and the like. Of course, two adjacent second magnetic conductive sheets 624 may be in direct contact with each other.

Of course, in other embodiments, the first magnetizer 40 includes a plurality of stacked first magnetic-conductive pieces 410, and the fixed magnetizer 620 is a single piece; alternatively, fixed magnetizer 620 includes a plurality of stacked second magnetic conductive pieces 624, and first magnetizer 40 is a unitary piece.

In addition, whether the first magnetic conductive sheet 40 includes a plurality of stacked first magnetic conductive sheets 410 and whether the fixed magnetic conductive sheet 620 includes a plurality of stacked second magnetic conductive sheets 624 may be combined with the above-described embodiments. For example, in the relay of the second embodiment, the first magnetizer 40 may include a plurality of stacked first magnetic conductive pieces 410, and the fixed magnetizer 620 is a single piece; alternatively, fixed magnetizer 620 includes a plurality of stacked second magnetic-conductive pieces 624, first magnetizer 40 being a unitary piece; alternatively, the first magnetic conductor 40 includes a plurality of stacked first magnetic conductive pieces 410, and the fixed magnetic conductor 620 includes a plurality of stacked second magnetic conductive pieces 624. It will be appreciated that the various embodiments/implementations provided by the utility model may be combined with one another without conflict and are not illustrated here.

In the inventive embodiments, the terms "first," "second," "third," "a pair," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the embodiments of the utility model will be understood by those skilled in the art according to the specific circumstances.

In the description of the embodiments of the utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the utility model and to simplify the description, and do not indicate or imply that the devices or units referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the utility model.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean 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 utility model. In this specification, schematic representations of the above terms 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 is only a preferred embodiment of the utility model and is not intended to limit the embodiment of the utility model, and various modifications and variations can be made to the embodiment of the utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present utility model should be included in the protection scope of the embodiments of the present utility model.

Claims

1. A relay, comprising:

a movable member movable relative to the contact receptacle;

2. The relay of claim 1, wherein the first magnetizer is movable between a first position and a second position by the movable member;

3. The relay of claim 2, wherein the second spacing between the first magnetizer and the movable member is equal to zero in the second position.

4. The relay of claim 2, wherein the first magnetic conductor is located at the first position, and a current value of the moving spring is less than or equal to a threshold current;

5. The relay of claim 1, wherein the relay further comprises:

6. The relay according to claim 5, wherein the fixed magnetizer has a first side surface facing the movable member and a second side surface disposed opposite to the first side surface;

7. The relay of claim 6, wherein the fixed magnetizer has a first perforation that extends through the first side surface and the second side surface;

8. The relay of claim 7, wherein the first resilient member has a second perforation corresponding to the first perforation;

9. The relay according to claim 8, wherein the movable member comprises a rod body and a pressing cap disposed at one end of the rod body, the rod body is disposed through the first through hole and the second through hole, and the pressing cap is pressed against a periphery of a side, facing away from the first magnetizer, of the second through hole.

10. The relay according to claim 9, wherein the first magnetizer is provided with a third perforation corresponding to the positions of the first perforation and the second perforation, and the rod body sequentially penetrates through the second perforation, the first perforation and the third perforation;

11. The relay of claim 6, wherein the first magnetizer is movable between a first position and a second position by the movable member; in the first position, a distance between the first magnetizer and the movable member is a first pitch, and in the second position, a distance between the first magnetizer and the movable member is a second pitch, the first pitch being greater than the second pitch;

12. The relay of claim 5, wherein the first magnetic conductor, the fixed magnetic conductor, and the first elastic member are each disposed between a pair of the stationary contact terminals.

13. The relay of claim 5, wherein the first resilient member comprises a leaf spring or a spring.

14. The relay according to claim 1, wherein a moving direction of the first magnetizer with respect to the movable member is a contact-separation direction along the movable spring and the stationary contact leading-out end.

15. The relay according to claim 1, wherein the movable member is movably provided on a side of the movable member facing the stationary contact leading-out ends, and the movable member is located between a pair of the stationary contact leading-out ends.

16. The relay of claim 1, wherein the moveable member is made of a metallic material.

17. The relay of claim 1, wherein the fixed magnetizer is fixedly connected to the contact receptacle by a connector.

18. The relay according to claim 17, wherein the contact container includes an insulating cover and a yoke plate, the insulating cover being connected to the yoke plate to form the contact chamber, a pair of the first through holes being opened to the insulating cover;

The fixed magnetizer is fixedly connected to the insulating cover or the yoke plate through the connecting piece.

19. The relay of claim 18, wherein the connector is in a rod or cylindrical configuration; one axial end of the connecting piece is connected with the insulating cover, and the other axial end of the connecting piece is connected with the fixed magnetizer.

20. The relay according to claim 18, wherein one end of the connecting member is connected to the fixed magnetizer and the other end is connected to a side of the yoke plate toward the stationary contact leading-out end.

21. The relay according to claim 18, wherein the insulating cover includes a ceramic cover and a frame piece, the ceramic cover being connected to the yoke plate through the frame piece; the pair of first through holes are formed in the ceramic cover;

22. The relay of claim 1, wherein the moveable member is movably mounted to the fixed magnetizer.

23. The relay of claim 1, wherein the movable member further comprises:

24. The relay of claim 1, wherein the first magnetic conductor and/or the fixed magnetic conductor comprises a plurality of stacked magnetic conductive sheets.