CN117912896A

CN117912896A - Relay device

Info

Publication number: CN117912896A
Application number: CN202211248732.3A
Authority: CN
Inventors: 代文广; 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: 2022-10-12
Filing date: 2022-10-12
Publication date: 2024-04-19

Abstract

The embodiment of the invention discloses a relay, which comprises a contact container, a first magnetizer, a movable component and a tripping assembly, wherein the contact container is provided with a contact chamber; the first magnetizer is movably arranged in the contact cavity, and the position relative to the contact container comprises a first position and a second position; the movable component comprises a movable reed and a second magnetizer, at least part of the second magnetizer is fixedly connected to one side of the movable reed, which is away from the first magnetizer, and the second magnetizer is used for forming a magnetic conduction loop with the first magnetizer; the distance between the first magnetizer and the second magnetizer is a first interval in the first position, and the distance between the first magnetizer and the second magnetizer is a second interval in the second position, wherein the first interval is larger than the second interval; the first magnetizer is connected to the contact container through a tripping assembly, and the tripping assembly is used for releasing the first magnetizer when the magnetic attraction between the first magnetizer and the second magnetizer is larger than a threshold value.

Description

Relay device

Technical Field

The invention relates to the technical field of relays, in particular 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), 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 following structure and the fixed structure are further distinguished according to the position where the upper yoke is disposed. 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 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 invention provides a relay, which is used for considering both short circuit resistance and limit breaking capacity.

The relay comprises a contact container, a first magnetizer, a movable component and a tripping assembly, wherein the contact container is provided with a contact chamber; the first magnetizer is movably arranged in the contact cavity, and the position relative to the contact container comprises a first position and a second position; the movable component comprises a movable reed and a second magnetizer, at least part of the second magnetizer is fixedly connected to one side of the movable reed, which is away from the first magnetizer, and the second magnetizer is used for forming a magnetic conduction loop with the first magnetizer; the distance between the first magnetizer and the second magnetizer is a first interval in the first position, and the distance between the first magnetizer and the second magnetizer is a second interval in the second position, wherein the first interval is larger than the second interval; the first magnetizer is connected to the contact container through the tripping assembly, and the tripping assembly is used for releasing the first magnetizer when the magnetic attraction between the first magnetizer and the second magnetizer is larger than a threshold value.

According to some embodiments of the invention, the first magnetizer is located at the first position, and a current value flowing through the movable reed is less than or equal to a threshold current;

When the current value flowing through the movable reed is larger than the threshold current, the tripping component releases the first magnetizer, so that the first magnetizer is attracted by the magnetic attraction force and moves from the first position to the second position.

According to some embodiments of the invention, the trip assembly comprises:

A first coupling member fixedly disposed with respect to the contact receptacle; and

A second coupling member having a position relative to the first coupling member including a locked position and a released position;

Wherein in the locked position, the second coupling member is coupled to the first coupling member such that the first magnetizer is in the first position, and in the released position, the second coupling member is decoupled from the first coupling member such that the first magnetizer is moved from the first position to the second position.

According to some embodiments of the invention, the second coupling member is fixedly connected to the first magnetizer; the trip assembly further includes:

the retainer is at least partially arranged in the contact cavity and fixedly arranged relative to the contact container; the first combining piece is fixedly connected to the retainer.

According to some embodiments of the invention, the first magnetizer is movably connected with the retainer by a limiting structure, and the limiting structure is used for limiting the first magnetizer to move from the first position to the second position relative to the retainer.

According to some embodiments of the invention, the limit structure comprises:

The limiting groove is arranged on one of the first magnetizer and the retainer, and extends along the moving direction of the movable reed; one end of the groove wall of the limiting groove, which is close to the second magnetizer, is provided with a stop wall; and

The limiting block is arranged on the other one of the first magnetizer and the retainer, the limiting block is in sliding fit with the limiting groove, and in the second position, the limiting wall is limited by the limiting block.

According to some embodiments of the invention, in the first position, a first gap is formed between the stopper and a groove wall of the stopper groove;

a second gap is formed between the limiting block and the groove wall of the limiting groove at the second position;

the first gap is smaller than the second gap.

According to some embodiments of the invention, the relay further comprises a pair of stationary contact terminals connected to the contact container, at least part of the stationary contact terminals are located in the contact chamber, and two ends of the movable reed are used for contacting with or separating from the pair of stationary contact terminals;

The contact container is also provided with a pair of first through holes and a second through hole, and the first through holes and the second through holes are communicated with the contact chamber; the pair of stationary contact leading-out ends are correspondingly penetrated in the pair of first through holes one by one;

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 retainer.

According to some embodiments of the invention, the contacting vessel comprises:

a yoke plate; and

The insulating cover comprises a top wall and a side wall, one end of the side wall is connected around the top wall in a surrounding mode, and the other end of the side wall is connected with 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 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;

A first metallization layer is arranged on the periphery of the first through hole in the outer wall surface of the top wall, and a second metallization layer is arranged on the periphery of the second through hole;

The stationary contact leading-out end is welded with the top wall through the first metallization layer, and the first end of the connecting piece is welded with the top wall through the second metallization 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 a split structure and are connected through welding.

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

a yoke plate; and

An insulating cover connected to the yoke plate;

The relay further comprises a fixing frame, wherein the fixing frame is arranged in the contact cavity and fixedly connected with the yoke plate, and the retainer is fixedly connected with the fixing frame.

According to some embodiments of the invention, the second coupling member is fixedly connected to the first magnetizer;

The first combining piece is magnetically connected with the second combining piece.

According to some embodiments of the invention, one of the first and second coupling members is a permanent magnet and the other is an iron block.

The first combining piece is connected with the second combining piece through a buckle.

According to some embodiments of the invention, one of the first and second coupling members includes a clip column and a convex hull protruding from an outer periphery of the clip column;

the other one of the first combining piece and the second combining piece comprises a clamping sleeve and a clamping groove concavely arranged on the inner peripheral wall of the clamping sleeve;

The clamping column is arranged in the clamping sleeve in a penetrating mode, and the convex hulls are clamped in the clamping grooves.

According to some embodiments of the invention, the first magnetizer has perforations;

the first combining piece comprises a guide post, and the guide post penetrates through the perforation and is fixedly arranged relative to the contact container;

the second combining piece comprises an elastic clamping ring, and the elastic clamping ring is movably sleeved at one end of the guide post, which is close to the second magnetizer;

In the locking position, the snap ring stops the first magnetizer from moving relative to the guide post towards the second magnetizer.

According to some embodiments of the invention, a stop structure is further provided between the guide post and the first magnetizer, for stopping the first magnetizer at the second position when the elastic snap ring is at the release position.

According to some embodiments of the invention, the stop structure comprises:

the first stop part is arranged on the first magnetizer; and

The second stop part is arranged on the guide post;

when the first magnetizer is positioned at the second position, the first stop part and the second stop part are stopped.

According to some embodiments of the invention, in the release position, the circlip is disengaged from the guide post; or alternatively, the first and second heat exchangers may be,

In the release position, the elastic clamping ring is clamped between the first magnetizer and the second stopping part.

According to some embodiments of the invention, a groove is formed in a side of the first magnetizer, which faces the second magnetizer, and the groove is communicated with the through hole;

The first magnetizer is positioned at the first position, and one end, close to the second magnetizer, of the elastic clamping ring and the guide pillar is accommodated in the groove.

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

According to the relay provided by the embodiment of the invention, on one hand, the first magnetizer is movably arranged in the contact cavity, so that the distance between the first magnetizer and the second magnetizer can be adjusted according to the magnitude of a current value, and the magnitude of magnetic attraction generated between the first magnetizer and the second magnetizer is changed, so that the requirement of short circuit resistance can be met while the breaking is met. On the other hand, the first magnetizer is connected to the contact container through the tripping assembly, and when the magnetic attraction between the first magnetizer and the second magnetizer is larger than a threshold value, the tripping assembly can release the first magnetizer, so that the magnetic distance between the first magnetizer and the second magnetizer is adjusted, and through the arrangement of the tripping assembly, the moving response speed of the first magnetizer is faster, and the sensitivity of short circuit resistance is higher.

Drawings

Fig. 1 shows a perspective view of a relay according to a first embodiment of the present invention, in which a housing, an electromagnet unit, and an arc extinguishing unit are omitted.

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

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

Figure 4 shows a cross-sectional view of A-A in figure 3.

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

Fig. 6 shows a cross-sectional view of B-B of fig. 3, with the ceramic cover and frame piece omitted and the first magnetic conductor in a first position.

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

Fig. 8 shows a cross-sectional view of B-B of fig. 3, with the ceramic cover and frame piece omitted and the first magnetic conductor in the second position.

Fig. 9 is a partially enlarged view of Y1 in fig. 8.

Fig. 10 shows a partial enlarged view at Z in fig. 2.

Fig. 11 shows a schematic view of the holder fixedly connected to the holder.

Fig. 12 is a perspective view of a relay according to a second embodiment of the present invention, in which a housing, an electromagnet unit, an arc extinguishing unit, a ceramic cover, and a frame sheet are omitted.

FIG. 13 shows a cross-sectional view of the assembled ceramic hood and frame piece of FIG. 12 at C-C.

Fig. 14 shows an exploded view of fig. 12.

Fig. 15 shows a cross-sectional view of D-D of fig. 12 with the first magnetizer in a first position.

Fig. 16 is a partial enlarged view of X2 in fig. 15.

Fig. 17 shows a cross-sectional view of D-D of fig. 12 with the first magnetizer in the second position.

Fig. 18 is a partial enlarged view of Y2 in fig. 17.

Fig. 19 is a perspective view of a relay according to a third embodiment of the present invention, in which a housing, an electromagnet unit, an arc extinguishing unit, a ceramic cover, and a frame sheet are omitted.

Fig. 20 is a schematic view of the ceramic cover and frame piece removed of fig. 19.

Fig. 21 shows a schematic top view of fig. 19.

Fig. 22 shows a cross-sectional view of E-E of fig. 21.

Fig. 23 shows an exploded view of fig. 19.

Fig. 24 shows a cross-sectional view of F-F of fig. 21 with the ceramic cover and frame piece omitted and the first magnetic conductor in a first position.

Fig. 25 is a partial enlarged view of X3 in fig. 24.

Fig. 26 shows a cross-sectional view of F-F of fig. 21 with the ceramic cover and frame pieces omitted and the first magnetic conductor in the second position.

Fig. 27 is a partially enlarged view of Y3 in fig. 26.

Fig. 28 is a perspective view of a relay according to a fourth embodiment of the present invention, in which a housing, an electromagnet unit, an arc extinguishing unit, a ceramic cover, and a frame sheet are omitted.

Fig. 29 is a schematic view of the ceramic cover and frame piece removed of fig. 28.

Fig. 30 shows a schematic top view of fig. 28.

Fig. 31 shows an exploded view of fig. 28.

Fig. 32 shows a cross-sectional view of G-G of fig. 31 with the ceramic cover and frame piece omitted and the first magnetic conductor in a first position.

Fig. 33 is a partial enlarged view of X4 in fig. 32.

Fig. 34 shows a cross-sectional view of G-G of fig. 31 with the ceramic cover and frame pieces omitted and the first magnetic conductor in the second position.

Fig. 35 is a partial enlarged view of Y4 in fig. 34.

Fig. 36 shows an exploded view of a relay according to an embodiment of the present invention.

Wherein reference numerals are as follows:

10. A contact vessel; 101. a contact chamber; 102. a first through hole; 103. a second through hole; 104. a fourth through hole; 105. welding terminals; 11a, an insulating cover; 11. a ceramic cover; 111. a top wall; 112. a sidewall; 113. a first metallization layer; 114. a second metallization layer; 115. a third metallization layer; 12. a frame piece; 13. a yoke plate; 131. a third through hole; 20. a stationary contact lead-out end; 30. a connecting piece; 31. a first end of the connector; 32. a second end of the connector; 40. a first magnetizer; 401. a groove; 41. perforating; 42. a retainer; 43. a limit structure; 431. a limit groove; 432. a limiting block; 433. a stop wall; 434. a limiting wall; 50. a push rod assembly; 51. a stem portion; 52. a base; 53. a movable member; 54. a movable reed; 55. a second magnetizer; 56. an elastic member; 57. a sliding structure; 571. a limit part; 572. a limiting hole; 70. a fixing frame; 80. a trip assembly; 810. a first coupling member; 811. a clamping column; 812. convex hulls; 820. a second coupling member; 821. a cutting sleeve; 822. a clamping groove; 830. a guide post; 831. a third end; 832. a fourth end; 840. an elastic clasp; 850. a stop structure; 851. a first stop portion; 852. a second stop portion; 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; 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, the second position; h1, a first interval; h2, second pitch; d1, a movement direction; d2, the length direction.

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. 36, fig. 36 is an exploded view of a relay according to an embodiment of the present invention. The relay 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.

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 of the sealing unit 1400 and the movable reed.

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 respectively disposed at both sides of the sealing unit 1400 and are disposed opposite to each other along the length direction of the movable reed.

By providing two opposing quenching magnets 1310, a magnetic field can be formed around the stationary contact lead-out end and the movable reed. Therefore, the arc generated between the stationary contact leading-out end and the movable reed 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. 1 to 5, fig. 1 is a perspective view of a relay according to a first embodiment of the present invention, in which a case, an electromagnet unit, and an arc extinguishing unit are omitted. Fig. 2 shows a schematic view of the ceramic hood 11 and frame piece 12 removed in fig. 1. Fig. 3 shows a schematic top view of fig. 1. Figure 4 shows a cross-sectional view of A-A in figure 3. Fig. 5 shows an exploded view of fig. 1.

The seal unit 1400 of the present embodiment includes a contact receptacle 10, a pair of stationary contact terminals 20, a push rod assembly 50, a first magnetizer 40, and a trip assembly 80.

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 invention. 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.

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 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 through the frame piece 12.

The contact container 10 further has a pair of first through holes 102 and a second through hole 103, and both the first through holes 102 and the second through holes 103 communicate with the contact chamber 101. The first through hole 102 is used for the stationary contact leading-out terminal 20 to pass through, and the second through hole 103 is used for a connecting piece 30 to pass 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, that is, the connecting member 30 is provided between the pair of stationary contact terminals 20.

A pair of stationary contact terminals 20 are connected 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 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 one-to-one correspondence, and are connected to the top wall 111 of the ceramic cap 11, for example, by welding.

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.

The first magnetizer 40 is movably arranged in the contact chamber 101, and the position relative to the contact container 10 comprises a first position P1 and a second position P2. That is, the first magnetizer 40 is disposed in the contact chamber 101 and is movable from the first position P1 to the second position P2 with respect to the contact container 10.

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 an elastic member 56.

The yoke plate 13 has a third through hole 131 penetrating both opposite sides of the yoke plate 13 in the thickness direction of the yoke plate 13, and the third through hole 131 communicates with the contact chamber 101 of the contact case 10. The rod 51 is axially movably inserted through the third 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 reed 54 and a second magnetizer 55, at least a portion of the second magnetizer 55 being fixedly connected to a side of the movable reed 54 facing away from the first magnetizer 40. That is, the movable reed 54 is located between the first magnetizer 40 and the second magnetizer 55 along the axial direction of the lever portion 51. The first magnetizer 40 and the second magnetizer 55 are used for forming a magnetic conductive loop.

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

It is understood that the first magnetizer 40 and the second magnetizer 55 can be made of iron, cobalt, nickel, alloys thereof, and the like.

In one embodiment, the first magnetizer 40 may be in a shape of a straight line, and the second magnetizer 55 may be in a shape of a U, but not limited thereto.

It is understood that each of the first and second magnetic conductors 40, 55 may include a plurality of stacked magnetic conductive sheets.

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

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

The 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.

As an example, one end of the elastic piece 56 abuts against the base 52, and the other end abuts against the second magnetizer 55 of the movable member 53. Of course, in other embodiments, the second magnetizer 55 may be provided with a through hole, and the other end of the elastic member 56 passes through the through hole of the second magnetizer 55 and abuts against the movable spring 54.

The first magnetic conductor 40 is coupled to the contact receptacle 10 by a trip assembly 80, the trip assembly 80 being configured to release the first magnetic conductor 40 when the magnetic attraction between the first magnetic conductor 40 and the second magnetic conductor 55 is greater than a threshold.

As shown in fig. 5, the push rod assembly 50 further includes a sliding structure 57, the sliding structure 57 being connected to the base 52 and the movable member 53, the movable member 53 being slidable relative to the base 52 by 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 present embodiment, the base 52 is directly connected with the movable member 53 through the stopper structure 57, so that the assembly between the base 52 and the movable member 53 is simpler. Further, since the remaining part does not exist above the movable member 53, the remaining part is prevented from being moved to interfere 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. Further, the second magnetizer 55 is provided with a limiting portion 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.

With continued reference to fig. 4, 5 and 36, the sealing unit 1400 further includes a metal cover 1410, wherein 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 in the yoke plate 13. The metal cover 1410 encloses a chamber with the yoke plate 13 for accommodating a stationary core 1230 and a movable core 1240 of the electromagnet unit 1200, as will be described in detail below.

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 third through-hole 131. The stationary core 1230 has a through hole 1231, and the through hole 1231 is disposed corresponding to the position of the third 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 plunger 1240 can drive the push rod assembly 50 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.

As shown in fig. 6 to 9, fig. 6 is a cross-sectional view of B-B in fig. 3, in which the ceramic cover and the frame sheet are omitted, and the first magnetizer 40 is in the first position P1. Fig. 7 shows a partial enlarged view at X1 in fig. 6. Fig. 8 shows a cross-sectional view of B-B of fig. 3, wherein the ceramic cover and frame piece are omitted and the first magnetic conductor 40 is in the second position P2. Fig. 9 is a partially enlarged view of Y1 in fig. 8. 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.

It should be noted that, in the embodiment of the present invention, the movable reed 54 is disposed between the first magnetizer 40 and the second magnetizer 55, when two ends of the movable reed 54 are in contact with the pair of stationary contact leading-out ends 20, a magnetic conduction loop surrounding the movable reed 54 is formed between the first magnetizer 40 and the second magnetizer 55, so that a magnetic attraction force along the contact pressure direction is generated between the first magnetizer 40 and the second magnetizer 55, and the magnetic attraction force can resist an electric repulsive force generated between the movable reed 54 and the stationary contact leading-out ends 20 due to a short circuit current, thereby ensuring that the movable reed 54 and the stationary contact leading-out ends 20 do not spring.

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

If the movable contact 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 this embodiment, the first magnetizer 40 is configured to be movable, 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 further changed, so as to achieve both short-circuit current resistance and limit breaking.

Specifically, as shown in fig. 6 and 7, the relay is in a normal operation state, and the current value of the movable reed 54 is equal to or less than 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, and the magnetic attraction force is smaller than or equal to a threshold value, and the magnitude of the threshold value can be understood as: the trip assembly 80 is disengaged such that the first magnetic conductor 40 is able to move relative to the contact vessel 10 by the magnitude of the magnetic attraction. Since the magnetic attraction between the first magnetic conductor 40 and the second magnetic conductor 55 is less than the threshold, the binding force of the trip assembly 80 itself is able to cancel the magnetic attraction between the first magnetic conductor 40 and the second magnetic conductor 55 and maintain the first magnetic conductor 40 in 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 and 9, when the current value flowing through the movable reed 54 is larger than the threshold current, the current is larger than 2000A, for example, and the larger the current value is, the larger the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 is, since the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 is proportional to the magnitude of the current value. When the magnetic attraction force is greater than the threshold value, that is, the magnetic attraction force is greater than the binding force of the trip assembly 80, the trip assembly 80 releases the first magnetizer 40, so that the first magnetizer 40 is attracted by the magnetic attraction force and moves towards the second magnetizer 55 (that is, moves from the first position P1 to the second position P2), and thus 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, the first magnetizer 40 moves to the second position P2, and 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 through 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 reed 54 is ensured not to spring 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 invention, on one hand, the first magnetizer 40 is movably arranged in the contact chamber 101, 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 is changed, thereby meeting the requirements of breaking and short-circuit resistance. On the other hand, the first magnetizer 40 is connected to the contact container 10 through the tripping assembly 80, and when the magnetic attraction between the first magnetizer 40 and the second magnetizer 55 is greater than the threshold value, the tripping assembly 80 can release the first magnetizer 40, so that the magnetic spacing between the first magnetizer 40 and the second magnetizer 55 is adjusted, and through the arrangement of the tripping assembly 80, the moving response speed of the first magnetizer 40 is faster, and the sensitivity of short circuit resistance is higher.

As shown in fig. 4 and 5, the trip assembly 80 includes a first coupler 810, a second coupler 820, and a holder 42. At least a portion of the holder 42 is disposed within the contact chamber 101 and is fixedly disposed relative to the contact receptacle 10. The first coupling member 810 is fixedly coupled to the holder 42, and the second coupling member 820 is fixedly coupled to the first magnetizer 40. The position of the second coupling 820 relative to the first coupling 810 includes a locking position and a releasing position. Wherein, in the locking position, the second coupling member 820 and the first coupling member 810 are coupled to locate the first magnetizer 40 at the first position P1, and in the releasing position, the second coupling member 820 and the first coupling member 810 are separated to move the first magnetizer 40 from the first position P1 to the second position P2.

Specifically, the first binder 810 and the second binder 820 can be connected by their own binding force. When the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 is smaller than or equal to the threshold value, that is, smaller than or equal to the binding force between the first binder 810 and the second binder 820, the second binder 820 is at the locking position relative to the first binder 810, and thus the first magnetizer 40 cannot move and is located at the first position P1. When the current becomes large, the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 is greater than the threshold value, that is, greater than the binding force between the first binder 810 and the second binder 820, and the second binder 820 is in the release position with respect to the first binder 810. Since the second coupling member 820 is disengaged from the first coupling member 810, the first magnetizer 40 is then attracted by the magnetic attraction force to move until moving to the second position P2.

In the present embodiment, the first bonding element 810 and the second bonding element 820 are magnetically connected. For example, the magnetic attraction force between the first bonding member 810 and the second bonding member 820 may be 20N, that is, the threshold value is 20N. When the magnetic attraction between the first magnetizer 40 and the second magnetizer 55 is less than or equal to 20N, the first coupling member 810 and the second coupling member 820 still maintain the magnetic attraction, so that the first magnetizer 40 is at the first position P1. When the magnetic attraction between the first magnetizer 40 and the second magnetizer 55 is greater than 20N, the second coupling member 820 is separated from the first coupling member 810, so that the first magnetizer 40 moves. In the process of moving the first magnetizer 40 from the first position P1 to the second position P2, the distance between the first combining piece 810 and the second combining piece 820 is gradually increased, so that the magnetic attraction between the first combining piece 810 and the second combining piece 820 is gradually reduced, and therefore the magnetic attraction between the first combining piece 810 and the second combining piece 820 does not influence the movement of the first magnetizer 40 from the first position P1 to the second position P2, and the movement response speed of the first magnetizer 40 is faster, and the sensitivity of short circuit resistance is higher.

As an example, one of the first coupling member 810 and the second coupling member 820 is a permanent magnet, and the other is an iron block. In detail, the permanent magnet may be fixedly connected to the holder 42, for example, by welding, bonding, or the like, and the iron block may be fixedly connected to the first magnetizer 40, for example, by welding, bonding, or the like. Of course, the permanent magnet may be fixedly connected to the first magnetizer 40, and the iron block may be fixedly connected to the retainer 42.

Of course, in other embodiments, the first bonding element 810 and the second bonding element 820 may be permanent magnets, and the polarities of the two may be opposite to each other so as to attract each other.

As shown in fig. 2 and 10, fig. 10 shows a partial enlarged view at Z in fig. 2. The first magnetizer 40 is movably connected with the retainer 42 through a limiting structure 43, and the limiting structure 43 is used for limiting the first magnetizer 40 to move from the first position P1 to the second position P2 relative to the retainer 42.

The limiting structure 43 includes a limiting groove 431 and a limiting block 432. The limiting groove 431 is provided on one of the first magnetizer 40 and the retainer 42, and the limiting groove 431 extends along the moving direction D1 of the movable reed 54. The limiting block 432 is arranged on the other of the first magnetizer 40 and the retainer 42, and the limiting block 432 is slidably matched with the limiting groove 431.

In the present embodiment, the stopper groove 431 is formed on the holder 42. The stopper 432 is formed on the first magnetizer 40, specifically, the stopper 432 is protruding on a side surface of the first magnetizer 40.

Of course, in other embodiments, the stopper groove 431 may be formed on the first magnetizer 40, and the stopper 432 may be formed on the retainer 42.

When the first magnetizer 40 is at the first position P1, a first gap is formed between the stopper 432 and the groove wall of the stopper groove 431. When the first magnetizer 40 is at the second position P2, a second gap is formed between the stopper 432 and the groove wall of the stopper groove 431. The first gap is smaller than the second gap.

Since the first gap is smaller than the second gap, the size of the limiting groove 431 is in a structure with one end being larger and the other end being smaller, so that the gap between the limiting block 432 and the groove wall of the limiting groove 431 is increased in the process that the first magnetizer 40 moves from the first position P1 to the second position P2, and friction and jamming between the limiting block 432 and the groove wall of the limiting groove 431 can be prevented.

As shown in fig. 8 and 9, a stop wall 433 is provided at one end of the groove wall of the limiting groove 431, which is close to the second magnetizer 55. When the first magnetizer 40 moves to the second position P2, the stop wall 433 stops at the stop block 432. At this time, the distance between the first magnetizer 40 and the second magnetizer 55 is the second distance H2, and the stopper 432 is stopped by the stopper wall 433, so that the first magnetizer 40 is fixed relative to the contact container 10, and thus a stable and reliable magnetic attraction force can be provided for the second magnetizer 55, and the requirement of short-circuit resistance is met.

It can be appreciated that when the first magnetizer 40 moves to the second position P2, that is, the stop wall 433 stops against the stop block 432, the first magnetizer 40 and the second magnetizer 55 may be attached to each other or may be disposed at intervals. The second spacing H2 may be considered to be equal to zero when the first magnetizer 40 is attached to the second magnetizer 55.

As shown in fig. 6 and 7, when the first magnetizer 40 is located at the first position P1, the first magnetizer 40 abuts against the retainer 42 under the action of the magnetic attraction force between the first coupling member 810 and the second coupling member 820, and the limiting block 432 is spaced from the limiting wall 434 of the limiting groove 431, so that the first magnetizer 40 is stably maintained in the retainer 42.

Of course, in other embodiments, the first magnetizer 40 may be held in the holder 42: the stopper 432 may abut against the other stopper wall 434 opposite to the stopper wall 433 in the stopper groove 431 under the magnetic attraction force between the first and second couplers 810 and 820.

As shown in fig. 5, 6 and 8, the relay further includes a connecting member 30, and the connecting member 30 is disposed through the second through hole 103 and includes a first end 31 and a second end 32, wherein the first end 31 is connected to the contact container 10, and the second end 32 is connected to the holder 42.

The contact container 10 is provided with a second through hole 103, and the connecting piece 30 is arranged through the second through hole 103, so that the connecting piece 30 is connected with the contact container 10, and the retainer 42 is connected with the connecting piece 30. The first magnetizer 40 is arranged on the retainer 42 fixed relative to the contact container 10 through the connecting piece 30, so that the retaining force of the first magnetizer 40 is provided by the contact container 10, thus the upper limit of the current carrying capacity of short circuit resistance can be effectively improved, and the reliability of short circuit resistance is ensured. The holder 42 is connected to the contact container 10 through the connection member 30 without being directly connected to the contact container 10, so that the connection process is not shielded and visualized, thereby facilitating the operation and ensuring the reliability of the connection.

Further, the first through hole 102 and the second through hole 103 are both opened on the top wall 111 of the ceramic cover 11, and the first end 31 of the connecting member 30 is connected with 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 at the periphery of the first via hole 102, and a second metallization layer 114 is provided at the periphery of the second via hole 103. The stationary contact lead-out end 20 is welded to the top wall 111 by a first metallization 113 and the first end 31 of the connector 30 is welded to the top wall 111 by a second metallization 114.

The outer wall surface of the top wall 111 of the ceramic cap 11 is easier to form a welding plane than the inner wall surface of the ceramic cap 11. Further, since the top wall 111 of the ceramic cap 11 is required to be provided with the stationary contact lead-out terminal 20, and a metallization layer is required to be provided on the periphery of the first through hole 102 also when the stationary contact lead-out terminal 20 is welded to the top wall 111, the second metallization layer 114 of the second through hole 103 is also processed when the first metallization layer 113 of the first through hole 102 is processed. Therefore, by welding the connector 30 to the outer wall surface of the top wall 111 of the ceramic cover 11, the metallized layer can be processed only on the outer wall surface of the top wall 111 without processing the metallized layer on the inner wall surface of the top wall 111, which is convenient to process and simplifies the processing steps.

The holder 42 is provided at a distance from the inner wall surface of the top wall 111. The retainer 42 is spaced from the inner wall surface of the top wall 111 such that a gap is provided between the retainer 42 and the inner wall surface of the top wall 111. Since the holder 42 is not in direct contact with the inner wall surface of the top wall 111, the arrangement of the holder 42 does not affect the creepage distance of the pair of stationary contact terminals 20.

The top wall 111 and the side wall 112 are of a split structure and are connected by welding.

It will be appreciated that by designing the ceramic cover 11 as a separate structure of the top wall 111 and the side walls 112, the connection of the connection member 30 to the top wall 111 is facilitated. Of course, bonding between the top wall 111 and the side wall 112 is also possible.

Specifically, since the top wall 111 is sheet-shaped, the sheet-shaped structure makes it easier to process the first through hole 102, the second through 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 weld the connecting member 30 and the top wall 111 and the stationary contact terminal 20 and the top wall 111.

The second end 32 of the connector 30 may be coupled to the retainer 42 in a variety of ways, such as welding, riveting, gluing, etc.

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

As shown in fig. 11, fig. 11 is a schematic view showing the holder 42 fixedly connected to the fixing frame 70. In addition to the above-described manner in which the holder 42 is fixedly disposed with respect to the contact vessel 10, the holder 42 may be fixedly attached to a fixing frame 70.

Specifically, the relay further includes a fixing frame 70, and the fixing frame 70 is disposed in the contact chamber 101 and fixedly connected to the yoke plate 13. The holder 42 is fixedly connected to the fixing frame 70.

As shown in fig. 12 to 14, fig. 12 is a perspective view showing a relay according to a second embodiment of the present invention, in which a case, an electromagnet unit, an arc extinguishing unit, a ceramic cover 11, and a frame piece 12 are omitted. FIG. 13 shows a cross-sectional view of the assembled ceramic hood and frame piece of FIG. 12 at C-C. Fig. 14 shows an exploded view of fig. 12. The second embodiment is the same as the first embodiment and is not described in detail, and the difference is that: the first coupling member 810 and the second coupling member 820 are coupled by a snap.

For example, the snap force between the first bonding element 810 and the second bonding element 820 may be 20N, i.e., the threshold value is 20N. When the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 is less than or equal to 20N, the first coupling member 810 and the second coupling member 820 still keep the clamping connection, so that the first magnetizer 40 is at the first position P1. When the magnetic attraction between the first magnetizer 40 and the second magnetizer 55 is greater than 20N, the second coupling member 820 is separated from the first coupling member 810, so that the first magnetizer 40 moves. Since the snap connection between the first coupling member 810 and the second coupling member 820 is disengaged at this time, the snap connection structure between the first coupling member 810 and the second coupling member 820 does not affect the movement of the first magnetizer 40 from the first position P1 to the second position P2 during the movement of the first magnetizer 40 from the first position P1 to the second position P2, so that the movement response speed of the first magnetizer 40 is faster and the sensitivity against short circuits is higher.

As shown in fig. 15-18, fig. 15 shows a cross-sectional view of D-D of fig. 12, with the first magnetic conductor 40 in the first position P1. Fig. 16 is a partial enlarged view of X2 in fig. 15.

Fig. 17 shows a cross-sectional view of D-D of fig. 12, with first magnetizer 40 in second position P2.

Fig. 18 is a partial enlarged view of Y2 in fig. 17.

As an example, one of the first coupling member 810 and the second coupling member 820 includes a card post 811 and a convex hull 812 protruding from the outer circumference of the card post 811. The other of the first coupling member 810 and the second coupling member 820 includes a card sleeve 821 and a card slot 822 concavely provided in an inner circumferential wall of the card sleeve 821. The clamping post 811 is inserted into the clamping sleeve 821, and the convex hull 812 is clamped in the clamping groove 822.

In the present embodiment, the first coupling member 810 includes a clip 811 and a convex hull 812, the convex hull 812 is provided on the outer periphery of the clip 811, and the clip 811 is connected to the holder 42. The second coupling member 820 includes a card sleeve 821 and a card slot 822, the card slot 822 is concavely provided on an inner circumferential wall of the card sleeve 821, and the card sleeve 821 is connected with the first magnetizer 40.

As shown in fig. 15 and 16, the clamping post 811 is inserted into the clamping sleeve 821, and the convex hull 812 is clamped in the clamping groove 822. Thus, when the magnetic attraction between the first magnetizer 40 and the second magnetizer 55 is equal to or less than the engagement force of the convex hull 812 and the engagement groove 822, the first magnetizer 40 does not move to the second magnetizer 55, but is maintained at the first position P1, that is, the distance between the first magnetizer 40 and the second magnetizer 55 is the first pitch H1.

As shown in fig. 17 and 18, when the magnetic attraction between the first magnetizer 40 and the second magnetizer 55 is greater than the engagement force between the convex hull 812 and the clamping groove 822, the convex hull 812 is disengaged from the clamping groove 822, so that the clamping post 811 moves relative to the clamping sleeve 821, and the first magnetizer 40 moves from the first position P1 to the second position P2. When the first magnetizer 40 is located at the second position P2, the distance between the first magnetizer 40 and the second magnetizer 55 is the second distance H2.

As shown in fig. 19 to 23, fig. 19 is a perspective view of a relay according to a third embodiment of the present invention, in which a case, an electromagnet unit, an arc extinguishing unit, a ceramic cover, and a frame sheet are omitted. Fig. 20 is a schematic view of the ceramic hood 11 and frame piece 12 removed in fig. 19. Fig. 21 shows a schematic top view of fig. 19. Fig. 22 shows a cross-sectional view of E-E of fig. 21. Fig. 23 shows an exploded view of fig. 19. The third embodiment is the same as the first embodiment and is not described in detail, and the difference is that:

The first magnetizer 40 has a perforation 41. The first coupling element 810 includes a guide post 830, where the guide post 830 is disposed through the through hole 41 and is fixed relative to the contact chamber 101. The second connector 820 includes an elastic snap ring 840, where the elastic snap ring 840 is movably sleeved on one end of the guide post 830 near the second magnetizer 55. In the locked position, the snap ring 840 stops the first magnetic conductor 40 from moving relative to the guide post 830 in the direction of the second magnetic conductor 55.

It will be appreciated that in this embodiment, the threshold value may be considered as the magnitude of the elastic pre-tightening force of the snap ring 840 and the guide post 830 and the frictional force between the guide posts 830.

Specifically, the snap ring 840 itself has an elastic pre-tightening force by which the snap ring 840 can clamp around the outer circumference of the guide post 830 and stop the first magnetic conductor 40 from moving relative to the guide post 830 toward the second magnetic conductor 55. When the magnetic attraction between the first magnetizer 40 and the second magnetizer 55 is less than or equal to the friction force between the elastic pretightening force of the elastic snap ring 840 and the guide post 830, the first magnetizer 40 is stopped and kept at the first position P1. When the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 is greater than the threshold value (friction force between the snap ring 840 and the guide post 830), the magnetic attraction force can attract the first magnetizer 40 to move relative to the guide post 830. At the same time, the first magnetic conductor 40 can drive the snap ring 840 out of position with the original clamp guide post 830.

A groove 401 is provided on a side of the first magnetizer 40 facing the second magnetizer 55, and the groove 401 communicates with the through hole 41. The first magnetizer 40 is at the first position P1, and the snap ring 840 and the end of the guide post 830 near the second magnetizer 55 are both accommodated in the groove 401. And, the snap ring 840 is stopped at the bottom of the groove 401.

Through the arrangement of the groove 401, the ends of the elastic snap ring 840 and the guide post 830, which are close to the second magnetizer 55, can be hidden in the groove 401, and are prevented from being exposed on the surface of the side of the first magnetizer 40, which faces the second magnetizer 55. In this way, the exposed portions of snap ring 840 and guide post 830 are prevented from affecting movement of first magnetic conductor 40 from first position P1 to second position P2.

Referring to fig. 24 and 25, fig. 24 shows a cross-sectional view of F-F of fig. 21, wherein the ceramic cover and frame piece are omitted and the first magnetizer 40 is in the first position P1. Fig. 25 is a partial enlarged view of X3 in fig. 24. When the first magnetizer 40 is at the first position P1, the elastic snap ring 840 is clamped around the outer periphery of the guide post 830, and stops the bottom wall of the groove 401 of the first magnetizer 40.

As shown in fig. 26 and 27, fig. 26 shows a cross-sectional view of F-F of fig. 21, wherein the ceramic cover and frame pieces are omitted and the first magnetizer 40 is in the second position P2. Fig. 27 is a partially enlarged view of Y3 in fig. 26. A stop structure 850 is further disposed between the guide post 830 and the first magnetizer 40, for stopping the first magnetizer 40 at the second position P2 when the elastic snap ring 840 is at the release position.

When the magnetic attraction between the first magnetizer 40 and the second magnetizer 55 is greater than the threshold value, the first magnetizer 40 is moved from the first position P1 to the second position P2. By the provision of the stopper structure 850, the first magnetizer 40 can be maintained at the second position P2.

It can be appreciated that, after the first magnetizer 40 moves from the first position P1 to the second position P2, the elastic snap ring 840 can still be clamped on the guide post 830, or can be detached from the guide post 830.

The stop structure 850 includes a first stop portion 851 and a second stop portion 852, the first stop portion 851 is disposed in the through hole 41 of the first magnetizer 40, and the second stop portion 852 is disposed in the guide post 830. Wherein, when the first magnetizer 40 is at the second position P2, the first stop portion 851 and the second stop portion 852 are stopped.

As an example, the hole wall of the through hole 41 of the first magnetizer 40 may have a step structure, and the outer peripheral wall of the guide post 830 may also have a step structure, and the two step structures are adapted, so as to implement a stop.

As shown in fig. 23, 24 and 26, the contact container 10 further has a fourth through hole 104, and the fourth through hole 104 communicates with the contact chamber 101. The guide post 830 is disposed through the fourth through hole 104, and includes a third end 831 and a fourth end 832, the third end 831 is connected to the contact container 10, and the elastic collar 840 is sleeved on the fourth end 832.

As an example, the third end 831 of the guide post 830 may be connected to the contact receptacle 10 by a solder terminal 105.

The contact container 10 is provided with a fourth through hole 104, and the guide post 830 is penetrating through the fourth through hole 104, so that the guide post 830 is connected with the contact container 10, and the first magnetizer 40 is connected with the guide post 830. The first magnetizer 40 is connected with the contact container 10 through the guide pillar 830, and is not directly connected with the contact container 10, so that the connection process is free from shielding and visualization, the operation is convenient, and the connection reliability is ensured.

Therefore, the third end 831 of the guide pillar 830 can be connected to the contact container 10, the fourth end 832 of the guide pillar 830 can be matched with the elastic snap ring 840, and by providing a guide pillar 830, the first magnetizer 40 can be moved from the first position P1 to the second position P2, and the first magnetizer 40 can be connected to the contact container 10, so that the effects of simplifying assembly and saving material cost are achieved.

As an example, the fourth through hole 104 is opened in the top wall 111 of the ceramic cover 11. The fourth through hole 104 may be disposed between the two first through holes 102, that is, the guide post 830 may be disposed between the pair of stationary contact terminals 20.

The first through hole 102 and the fourth through hole 104 are formed in the top wall 111, and the third end 831 of the guide post 830 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 at the periphery of the first through hole 102, and a third metallization layer 115 is provided at the periphery of the fourth through hole 104. The stationary contact lead-out end 20 is welded to the top wall 111 by the first metallization 113 and the third end 831 of the guide post 830 is welded to the top wall 111 by the third metallization 115.

The outer wall surface of the top wall 111 of the ceramic cap 11 is easier to form a welding plane than the inner wall surface of the ceramic cap 11. Further, since the top wall 111 of the ceramic cap 11 is required to be provided with the stationary contact lead-out terminal 20, and a metallization layer is required to be provided on the periphery of the first through hole 102 also when the stationary contact lead-out terminal 20 is welded to the top wall 111, the third metallization layer 115 of the fourth through hole 104 is also processed when the first metallization layer 113 of the first through hole 102 is processed. Therefore, by welding the guide posts 830 to the outer wall surface of the top wall 111 of the ceramic cover 11, the metallization layer can be processed only on the outer wall surface of the top wall 111, without processing the metallization layer on the inner wall surface of the top wall 111, which is convenient to process and simplifies the processing steps.

The first magnetizer 40 is provided at a distance from the inner wall surface of the top wall 111. The first magnetizer 40 is spaced from the inner wall surface of the top wall 111, so that a gap is formed between the first magnetizer 40 and the inner wall surface of the top wall 111. Since the first magnetizer 40 is not in direct contact with the inner wall surface of the top wall 111, the arrangement of the first magnetizer 40 does not affect the creepage distance of the pair of stationary contact terminals 20.

The top wall 111 and the side wall 112 of the ceramic cap 11 are of a split structure and are connected by welding.

It will be appreciated that by designing the ceramic cover 11 as a separate structure for the top wall 111 and the side walls 112, the connection of the guide posts 830 to the top wall 111 is facilitated. Of course, bonding between the top wall 111 and the side wall 112 is also possible.

Specifically, since the top wall 111 is sheet-shaped, the sheet-shaped structure makes it easier to process the first through hole 102, the fourth through hole 104, the first metallization layer 113, and the third metallization layer 115 on the top wall 111. Further, the sheet-like structure also makes it easier to achieve the welding of the guide post 830 and the top wall 111 and the stationary contact terminal 20 and the top wall 111.

It should be understood that, in addition to the above-mentioned manner of fixedly connecting to the top wall 111 of the ceramic cover 11, the guide post 830 may also be fixedly connected to a fixing frame 70, where the fixing frame 70 is disposed in the contact chamber 101 and is fixedly connected to the yoke plate 13, and the manner of arranging the fixing frame 70 in the relay according to the first embodiment of the present invention will not be described herein.

As shown in fig. 28 to 35, the fourth embodiment is the same as the third embodiment and is not described in detail, and the difference is that: in the released position, the snap ring 840 is sandwiched between the first magnetic conductor 40 and the second stop 852.

Specifically, the first stop portion 851 of the stop structure 850 is disposed at the periphery of the through hole 41, and the second stop portion 852 is disposed at the fourth end 832 of the guide post 830.

As shown in fig. 32 and 33, when the first magnetizer 40 is at the first position P1, the snap ring 840 is clamped around the outer periphery of the guide post 830 and abuts against the first stop 851 to hold the first magnetizer 40 at the first position P1. In this case, the snap ring 840 and the second stopper 852 are located in the groove 401 of the first magnetizer 40.

As shown in fig. 34 and 35, during the movement of the first magnetic conductor 40 from the first position P1 to the second position P2, the snap ring 840 moves toward the fourth end 832 of the guide post 830 until it contacts the second stop 852. When the first magnetizer 40 moves to the second position P2, the snap ring 840 is sandwiched between the first stopper 851 and the second stopper 852.

It will be appreciated that the various embodiments/implementations provided by the invention may be combined with one another without conflict and are not illustrated here.

In the inventive embodiments, the terms "first," "second," "third," and the like 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 technical feature and should not be construed as limiting the specific number of such technical features unless explicitly defined otherwise; 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 invention will be understood by those skilled in the art according to the specific circumstances.

In the description of the embodiments of the invention, 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 invention 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 invention.

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 invention. 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 invention and is not intended to limit the embodiment of the invention, and various modifications and variations can be made to the embodiment of the invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A relay, comprising:

a contact vessel having a contact chamber;

the first magnetizer is movably arranged in the contact cavity, and the position relative to the contact container comprises a first position and a second position;

The movable component comprises a movable reed and a second magnetizer, at least part of the second magnetizer is fixedly connected to one side of the movable reed, which is away from the first magnetizer, and the second magnetizer is used for forming a magnetic conduction loop with the first magnetizer; the distance between the first magnetizer and the second magnetizer is a first interval in the first position, and the distance between the first magnetizer and the second magnetizer is a second interval in the second position, wherein the first interval is larger than the second interval; and

And the tripping assembly is used for releasing the first magnetizer when the magnetic attraction between the first magnetizer and the second magnetizer is greater than a threshold value.

2. The relay of claim 1, wherein the first magnetic conductor is located at the first position, and a current value of the movable reed is less than or equal to a threshold current;

3. The relay of claim 1, wherein the trip assembly comprises:

4. A relay according to claim 3, wherein the second coupling member is fixedly connected to the first magnetizer; the trip assembly further includes:

5. The relay of claim 4, wherein the first magnetizer is movably connected with the retainer by a limiting structure, the limiting structure being configured to limit movement of the first magnetizer relative to the retainer from the first position to the second position.

6. The relay of claim 5, wherein the limit structure comprises:

7. The relay of claim 6, wherein in the first position, a first gap is provided between the stopper and a wall of the stopper groove;

the first gap is smaller than the second gap.

8. The relay of claim 4, further comprising a pair of stationary contact terminals connected to said contact receptacle, at least a portion of said stationary contact terminals being located within said contact chamber, both ends of said movable spring being adapted to contact or separate from a pair of said stationary contact terminals;

9. The relay of claim 8, wherein the contact receptacle comprises:

a yoke plate; and

10. The relay according to claim 9, wherein the insulating cover includes a ceramic cover and a frame piece, the ceramic cover including the top wall and the side wall, the other end of the side wall being connected to the yoke plate through the frame piece;

11. The relay of claim 9, wherein the top wall and the side wall are of unitary construction; or, the top wall and the side wall are of a split structure and are connected through welding.

12. The relay of claim 9, wherein the cage is spaced from an inner wall surface of the top wall.

13. The relay of claim 4, wherein the contact receptacle comprises:

a yoke plate; and

An insulating cover connected to the yoke plate;

14. A relay according to claim 3, wherein the second coupling member is fixedly connected to the first magnetizer;

15. The relay of claim 14, wherein one of the first coupling member and the second coupling member is a permanent magnet and the other is an iron block.

16. A relay according to claim 3, wherein the second coupling member is fixedly connected to the first magnetizer;

17. The relay of claim 16, wherein one of the first and second coupling members comprises a clip and a convex hull protruding from an outer periphery of the clip;

18. The relay of claim 3, wherein the first magnetic conductor has perforations;

19. The relay of claim 18, wherein a stop structure is further provided between the guide post and the first magnetizer for stopping the first magnetizer in the second position when the snap ring is in the release position.

20. The relay of claim 19, wherein the stop structure comprises:

the first stop part is arranged on the first magnetizer; and

The second stop part is arranged on the guide post;

21. The relay of claim 20, wherein in the release position, the snap ring is disengaged from the guide post; or alternatively, the first and second heat exchangers may be,

22. The relay of claim 18, wherein a side of the first magnetic conductor facing the second magnetic conductor is provided with a groove, the groove being in communication with the perforation;