CN117912893A

CN117912893A - Relay device

Info

Publication number: CN117912893A
Application number: CN202211249321.6A
Authority: CN
Inventors: 代文广; 陈松生; 王萌; 傅大鹏; 谢丰柱
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 pair of static contact leading-out ends, a connecting piece, a first magnetizer and a push rod assembly. The contact container is provided with a contact chamber, a pair of first through holes and a pair of second through holes, and the first through holes and the second through holes are communicated with the contact chamber; the pair of stationary contact leading-out ends penetrate through the pair of first through holes in a one-to-one correspondence manner and are connected with the contact container; the connecting piece is arranged in the second through hole in a penetrating way and comprises a first end and a second end, and the first end is connected with the contact container; the first magnetizer is arranged in the contact cavity and is connected with the second end of the connecting piece; the push rod assembly comprises a movable reed and a second magnetizer fixedly connected with the movable reed, the movable reed is arranged in the contact cavity and used for contacting or separating with the pair of stationary contact leading-out ends, the second magnetizer is arranged in the contact cavity and at least partially positioned at one side of the movable reed, which is opposite to the first magnetizer, and the second magnetizer is used for forming a magnetic conduction loop with the first magnetizer.

Description

Relay device

Technical Field

The embodiment of 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, when a short-circuit load is large, a contact of the high-voltage direct current relay can be bounced off due to electric repulsive force generated by short-circuit current, and the contact can be burnt out and exploded under the action of a strong arc when bounced off instantaneously.

In the related art, in order to avoid that a relay contact spring open under a short-circuit current, a follow-up anti-short-circuit ring electromagnetic structure is generally arranged. Specifically, a first magnetizer and a second magnetizer are arranged on a push rod assembly of the relay, when short-circuit current generates electric repulsive force, the first magnetizer generates electromagnetic attraction to the second magnetizer, and the second magnetizer is fixed with the movable reed together, so that the movable reed is prevented from bouncing off.

However, since the push rod assembly needs to be supported by the holding force of the plunger, which is the electromagnetic force generated by energizing the coil, the holding force for supporting the anti-short circuit ring is limited due to the limited power consumption of the coil. Therefore, when the short-circuit current reaches a certain value, the second magnetizer also has an electromagnetic attraction force to the first magnetizer, and when the holding force of the movable iron core can not support the electromagnetic attraction force of the second magnetizer to the first magnetizer, the contact spring-open still can occur. Further, in the related art, a large coil is used to increase the holding force of the movable iron core, but the large coil increases the volume of the relay.

Disclosure of Invention

The embodiment of the invention provides a relay, which is used for improving the performance of the relay for resisting short-circuit current and avoiding the relay from being burnt and exploded under the action of strong electric arc.

The relay provided by the embodiment of the invention comprises a contact container, a pair of stationary contact leading-out ends, a connecting piece, a first magnetizer and a pushing rod assembly, wherein the contact container is provided with a contact cavity, 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 cavity; the pair of stationary contact leading-out ends are correspondingly penetrated through the pair of first through holes one by one and are connected with the contact container; the connecting piece is arranged in the second through hole in a penetrating way and comprises a first end and a second end, and the first end is connected with the contact container; the first magnetizer is arranged in the contact cavity and is connected with the second end of the connecting piece; the push rod assembly comprises a movable reed and a second magnetizer fixedly connected with the movable reed, and the movable reed is arranged in the contact cavity and is used for contacting with or separating from a pair of stationary contact leading-out ends; the second magnetizer is arranged in the contact cavity and at least partially positioned at one side of the movable reed, which is opposite to 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 invention, the contacting vessel comprises:

A yoke plate having a third through hole communicating with the contact chamber, the push rod assembly being movably inserted through the third through hole; and

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

The first through holes and the second through holes are formed in the top wall, and the first ends of the connecting pieces are 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 first magnetizer is spaced from an inner wall surface of the top wall.

According to some embodiments of the invention, the second end of the connector is riveted or welded or glued to the first magnetically permeable body.

According to some embodiments of the invention, the first magnetic conductor includes a plurality of stacked magnetic conductive sheets connected to the second end of the connector.

According to some embodiments of the invention, the push rod assembly further comprises:

a base;

One end of the elastic piece is abutted against the base, the other end of the elastic piece is abutted against a movable component formed by the movable reed and the second magnetizer, and the elastic piece provides elastic force so that the movable reed has a tendency to move towards the fixed contact leading-out end;

A limiting structure connected to the base and the movable member for limiting a movement range of the movable member relative to the base; the limiting structure comprises a limiting hole and a limiting part which are matched, the limiting hole comprises a first end and a second end which are oppositely arranged along the moving direction of the movable reed, and the limiting part is movably penetrated between the first end and the second end of the limiting hole;

When the movable reed is separated from the fixed contact leading-out end, the limiting part is positioned at the first end of the limiting hole.

According to some embodiments of the invention, the second end has a larger pore size than the first end.

According to some embodiments of the invention, the stop portion has a first arcuate surface for effecting a stop with the stop aperture when the stop portion is at the first end of the stop aperture.

According to some embodiments of the invention, the limiting portion is a rivet, and the rivet is riveted to the second magnetizer.

According to some embodiments of the invention, the movable member further includes a fixing member fixedly connected to the second magnetizer, one of the fixing member and the base is provided with the limiting portion, and the other of the fixing member and the base is provided with the limiting hole.

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, the connecting piece is arranged, so that the first magnetizer is connected to the contact container by virtue of the connecting piece. On the one hand, the first magnetizer is connected to the contact container and does not follow the push rod assembly, so that the magnetic attraction force of the second magnetizer on the first magnetizer acts on the contact container through the connecting piece, and the contact container is relatively fixed in position, so that the phenomenon that the movable reed and the static contact leading-out end are sprung out due to insufficient holding force of the push rod assembly to cause the burning and explosion of the relay can be avoided. On the other hand, the contact container is provided with a second through hole, the connecting piece penetrates through the second through hole, and then the connecting piece is connected with the contact container, and the first magnetizer is connected with the connecting piece. The first magnetizer is connected with the contact container through the connecting piece, and is not directly connected with the contact container, so that the connection process is free from shielding and visualization, the operation is convenient, and the connection reliability is ensured.

Drawings

Fig. 1 shows a perspective view of a relay according to a first embodiment of the present invention, in which a coil and a magnetic circuit are omitted.

Fig. 2 shows a schematic top view of fig. 1.

Figure 3 shows a cross-sectional view of A-A in figure 2.

Fig. 4 shows an exploded view of fig. 1.

Fig. 5 shows a schematic side view of a pusher bar assembly according to a first embodiment of the present invention.

Fig. 6 shows an exploded view of fig. 5.

Fig. 7 shows a partial enlarged view at X in fig. 5.

Fig. 8 shows a cross-sectional view of B-B in fig. 5.

Fig. 9 shows an exploded view of a push rod assembly according to a second embodiment of the present invention.

Fig. 10 shows an exploded view of a push rod assembly according to a third embodiment of the present invention.

Fig. 11 shows an exploded view of a push rod assembly according to a fourth embodiment of the present invention.

Fig. 12 shows an exploded view of a push rod assembly according to a fifth embodiment of the present invention.

Fig. 13 shows an exploded view of a relay according to a second embodiment of the present invention.

Fig. 14 shows an exploded view of the relay according to the first embodiment of the present invention.

Fig. 15 is a perspective view of fig. 1 with the insulating cover omitted.

Fig. 16 shows a cross-sectional view of C-C of fig. 2.

Wherein reference numerals are as follows:

10. A contact vessel; 101. a contact chamber; 102. a first through hole; 103. a second through hole; 11a, an insulating cover; 11. a ceramic cover; 111. a top wall; 112. a sidewall; 113. a first metallization layer; 114. a second 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; 41. magnetic conductive sheets; 411. opening holes; 50. a push rod assembly; 51. a stem portion; 52. a base; 521. a base; 522. a first limiting member; 523. a second limiting piece; 524. a second arcuate surface; 53. a movable member; 54. a movable reed; 55. a second magnetizer; 551. a bottom; 552. a first side portion; 553. a second side portion; 56. an elastic member; 57. a limit structure; 571. a limit part; 571a, a first arcuate surface; 572. a limiting hole; 573. a first end of the limiting aperture; 574. the second end of the limiting hole; 575. a first plane; 576. a second plane; 577. a first inclined surface; 578. a second inclined surface; 579. a rivet; 58. a fixing member; 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. perforating; 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; d1, a movement direction; d2, the length direction; d3, width 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. 14 to 16, fig. 14 is an exploded view of a relay according to a first 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 arranged at two sides of the insulating cover and are oppositely arranged along the length direction D2 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 4, 15 and 16, fig. 1 is a perspective view of a relay according to a first embodiment of the present invention, in which a coil and a magnetic circuit are omitted. Fig. 2 shows a schematic top view of fig. 1. Figure 3 shows a cross-sectional view of A-A in figure 2. Fig. 4 shows an exploded view of fig. 1. Fig. 15 is a perspective view of fig. 1 with the insulating cover omitted. Fig. 16 shows a cross-sectional view of C-C of fig. 2.

The sealing unit 1400 of the embodiment of the present invention includes a contact receptacle 10, a pair of stationary contact lead-out ends 20, a connector 30, a first magnetizer 40, and a push rod assembly 50. The contact container 10 has a contact chamber 101, a pair of first through holes 102 and a second through hole 103, and both the first through hole 102 and the second through hole 103 communicate with the contact chamber 101. The pair of stationary contact terminals 20 are connected to the contact container 10 and are disposed through the pair of first through holes 102 in a one-to-one correspondence. The connecting member 30 is disposed through the second through hole 103, and includes a first end 31 and a second end 32, where the first end 31 is connected to a wall of the container 10. The first magnetizer 40 is disposed in the contact chamber 101 and is connected to the second end 32 of the connector 30. The push rod assembly 50 includes a movable spring 54 and a second magnetizer 55 fixedly connected to the movable spring 54, the movable spring 54 is disposed in the contact chamber 101 and is used for contacting with or separating from the pair of stationary contact terminals 20, the second magnetizer 55 is disposed in the contact chamber 101 and is at least partially located at a side of the movable spring 54 facing away from the first magnetizer 40, and the second magnetizer 55 is used for forming a magnetic conductive loop with the first magnetizer 40.

It will be appreciated that in the relay of the present embodiment, the movable contact spring 54 is disposed between the first conductive member 40 and the second conductive member 55, and when the two ends of the movable contact spring 54 are in contact with the pair of stationary contact lead-out terminals 20, the second conductive member 55 moving together with the movable contact spring 44 approaches or contacts the first conductive member 40, thereby forming a conductive magnetic circuit around the movable contact spring 54 between the first conductive member 40 and the second conductive member 55. When the short-circuit current passes through the movable reed 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 reed 54 and the stationary contact leading-out end 20 due to the short-circuit current, so that the movable reed 54 and the stationary contact leading-out end 20 are ensured not to spring open.

As shown in fig. 16, when both ends of the movable reed 54 are disconnected from the pair of stationary contact leading ends 20, since no current passes through the movable reed 54, no magnetic attraction is generated between the first magnetizer 40 and the second magnetizer 55.

The relay of the embodiment of the present invention is provided with the connecting member 30, so that the first magnetizer 40 is connected to the contact container 10 by means of the connecting member 30. On the one hand, the first magnetizer 40 is connected to the contact container 10, but does not follow the push rod assembly 50, so that the magnetic attraction force of the second magnetizer 55 to the first magnetizer 40 acts on the contact container 10 through the connecting piece 30, and the contact container 10 is relatively fixed, so that the spring open of the movable reed 54 and the fixed contact leading-out end 20 caused by insufficient holding force of the push rod assembly 50 can be avoided, and the burning and explosion of the relay can be caused. On the other hand, the contact container 10 is provided with a second through hole 103, and the connecting piece 30 is inserted through the second through hole 103, so that the connecting piece 30 is connected with the contact container 10, and the first magnetizer 40 is connected with the connecting piece 30. The first magnetizer 40 is connected with the contact container 10 through the connecting piece 30, 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.

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 container 10 includes a yoke plate 13 and an insulating cover 11a, the insulating cover 11a being provided to one side surface of the yoke plate 13 to form a contact chamber 101 of the contact container 10. The yoke plate 13 has a third through hole 131 communicating with the contact chamber 101, and the push rod assembly 50 is movably provided through the third through hole 131. Two yoke clips 1320 surround the insulating cover 11a.

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.

Two quenching magnets 1310 are respectively located at both sides of the ceramic envelope 11, and two yoke clips 1320 surround the ceramic envelope 11 and the two quenching magnets 1310.

The ceramic cover 11 includes a top wall 111 and a side wall 112, one end of the side wall 112 being connected around the outer periphery of the top wall 111, and the other end of the side wall 112 being connected to the yoke plate 13 through the frame piece 12. The first through hole 102 and the second through hole 103 are both opened in the top wall 111, and the first end 31 of the connecting member 30 is connected to the outer wall surface of the top wall 111.

It will be appreciated that 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 fixed contact leading-out end 20 is arranged through the first through hole 102, and part of the fixed contact leading-out end 20 extends into the contact chamber 101 for contacting with or separating from the movable reed 54. Part of the stationary contact terminal 20 is exposed to the outer wall surface of the ceramic cap 11.

The bottom of the stationary contact lead-out end 20 serves as a stationary contact, and 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 will be appreciated that the stationary contact may be integrally or separately provided at the bottom of the stationary contact terminal 20, and 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 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. The number of second through holes 103 may be one or more. In the present embodiment, the number of the second through holes 103 is two, but not limited thereto.

Accordingly, the number of the connection members 30 may be one or more. In the present embodiment, the number of the connecting members 30 is two, but not limited thereto.

With continued reference to fig. 4, in the outer wall surface of the top wall 111 of the ceramic cover 11, a first metallization layer 113 is disposed at the periphery of the first through hole 102, and a second metallization layer 114 is disposed at the periphery of the second through 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 first magnetizer 40 is provided at a distance from the inner wall surface of the top wall 111. That is, the length of the connection member 30 is greater than the sum of the thickness of the top wall 111 and the thickness of the first magnetizer 40, so that the first magnetizer 40 is suspended from the top wall 111 of the ceramic cover 11 by the connection member 30.

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.

With continued reference to fig. 3 and 4, the first magnetic conductor 40 includes a plurality of stacked magnetic conductive pieces 41, and the plurality of magnetic conductive pieces 41 are connected to the second end 32 of the connecting member 30. Each magnetic conductive sheet 41 is provided with an opening 411, and the connecting piece 30 is arranged through the opening 411 and riveted with the magnetic conductive sheet 41 positioned at the lowest part.

Of course, when the first magnetizer 40 includes a plurality of stacked magnetically conductive sheets 41, the opening 411 of the lowermost magnetically conductive sheet 41 may be a blind hole, and the openings 411 of the remaining magnetically conductive sheets 41 may be through holes. The connecting piece 30 is inserted into each opening 411 of the rest of the magnetic conductive sheets 41, and the second end of the connecting piece 30 extends into the blind hole of the magnetic conductive sheet 41 located at the lowest position and is welded with the magnetic conductive sheet 41.

When the first magnetizer 40 is one piece, the first magnetizer 40 is provided with an opening 411, and the opening 411 may be a through hole or a blind hole. When the opening 411 is a through hole, the connecting piece 30 is riveted with the first magnetizer 40 after passing through the opening 411. When the opening 411 is a blind hole, solder may be disposed in the blind hole, and the second end 32 of the connecting member 30 extends into the blind hole and is soldered to the first conductive member 40.

As an example, when the short-circuit current reaches above 10kA, the thickness of the first magnetizer 40 needs to be increased to generate a larger magnetic attraction force, so as to ensure that the magnetic attraction force between the first magnetizer 40 and the second magnetizer 55 can overcome the repulsive force generated by the short-circuit current, and prevent the movable reed 54 from bouncing off the fixed contact lead 20. However, the first magnetizer 40 having a larger thickness is costly and difficult to connect with the ceramic cover 11.

In this embodiment, since the first magnetizer 40 is connected to the contact container 10 through the connecting member 30, the first magnetizer 40 may include a plurality of stacked magnetic conductive pieces 41, and the second through holes 103 penetrating the plurality of magnetic conductive pieces 41 through the connecting member 30 are connected, so that the overall thickness of the first magnetizer 40 is increased by increasing the number of the magnetic conductive pieces 41 with a smaller thickness. On the one hand, the thickness of the magnetic conductive sheet 41 is thinner, and the magnetic conductive sheet can be made of thin strips, so that the material cost is lower, and the operation is easy. On the other hand, the number of the magnetic conductive sheets 41 can be flexibly adjusted according to the magnitude of the short-circuit current.

The top wall 111 and the side wall 112 of the ceramic cap 11 may be of a separate structure and 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.

Of course, the top wall 111 and the side wall 112 of the ceramic cover 11 may be of a unitary structure.

The second end 32 of the connector 30 may be coupled to the first magnetic conductor 40 by various means, such as welding, riveting, gluing, etc.

In this embodiment, the second end 32 of the connector 30 is riveted to the first magnetic conductor 40. Specifically, the second end 32 of the connector 30 is connected to the first magnetic conductor 40 by a rivet-expanding method.

It is understood that the first magnetizer 40 may be in a straight shape, and the second magnetizer 55 may be in a U shape. The first magnetizer 40 and the second magnetizer 55 can be made of iron, cobalt, nickel, alloys thereof, and the like.

Of course, it is understood that the second magnetizer 55 may also include a plurality of stacked magnetic conductive sheets, or the second magnetizer 55 may include a plurality of U-shaped magnetizers arranged side by side.

As shown in fig. 14 and 16, 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 insulation cap 11a, and the metal cap 1410 is provided to cover 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.

As shown in fig. 4 and 16, the push rod assembly 50 further includes a rod portion 51, a base 52, and an elastic member 56. The rod 51 is movably inserted through the third through-hole 131 of the yoke plate 13. One end of the rod 51 is connected to the base 52, and the other end of the rod 51 is connected to the plunger 1240 of the electromagnet unit 1200. One end of the elastic member 56 abuts against the base 52, the other end of the elastic member 56 abuts against the movable member 53 composed of the movable reed 54 and the second magnetizer 55, and the elastic member 56 provides an elastic force so that the movable reed 54 has a tendency to move toward the stationary contact leading-out end 20.

It is understood that the elastic member 56 may be a spring, but is not limited thereto.

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. 16, 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.

As shown in fig. 5-8, fig. 5 shows a schematic side view of a push rod assembly 50 according to a first embodiment of the present invention. Fig. 6 shows an exploded view of fig. 5. Fig. 7 shows a partial enlarged view at X in fig. 5. Fig. 8 shows a cross-sectional view of B-B in fig. 5.

The push rod assembly 50 further includes a limiting structure 57, the limiting structure 57 being coupled to the base 52 and the movable member 53 for limiting a range of movement of the movable member 53 relative to the base 52. The limiting structure 57 includes a limiting hole 572 and a limiting portion 571, the limiting hole 572 includes a first end 573 and a second end 574 disposed opposite to each other along a movement direction D1 of the movable reed 54, an aperture of the second end 574 is larger than an aperture of the first end 573, and the limiting portion 571 is movably disposed between the first end 573 and the second end 574 of the limiting hole 572. When the movable contact 54 is separated from the stationary contact leading-out end 20, the stopper 571 is located at the first end 573 of the stopper hole 572.

In the present embodiment, the base 52 is directly connected with the movable member 53 through the limiting structure 57, so that the assembly between the base 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.

When the movable contact 54 is not in contact with the stationary contact leading-out end 20, the stopper 571 is located at the first end 573 of the stopper hole 572 under the action of the elastic member 56. When the movable contact 54 contacts the stationary contact terminal 20 and the overstroke is completed, the stopper 571 moves from the first end 573 to the second end 574 of the stopper hole 572. Since the aperture of the second end 574 of the limiting hole 572 is larger than that of the first end 573, the limiting hole 572 has a structure that "one end is large and the other end is small", so that the gap between the limiting portion 571 and the wall of the limiting hole 572 is increased during the overstroke process, and friction and jamming between the limiting portion 571 and the wall of the limiting hole 572 can be prevented during the movement of the movable reed 54 relative to the base 52. Meanwhile, the aperture of the first end 573 of the limiting hole 572 is smaller, and the limiting cooperation between the limiting part 571 and the limiting hole 572 in the initial state is not affected, so that the movable reed 54 is prevented from shaking relative to the base 52.

It should be noted that, in order to realize the limitation of the movable spring plate 54 and the base 52 in the initial state, the aperture of the first end 573 of the limiting hole 572 should be adapted to the shape of the limiting portion 571, so that when the limiting portion 571 is located at the first end 573 of the limiting hole 572, the limiting portion 571 can realize the limitation with the wall of the limiting hole 572.

With continued reference to fig. 5-8, the aperture of the limiting aperture 572 gradually increases from the first end 573 of the limiting aperture 572 toward the second end 574. During the over-travel, the gap between the position-restricting portion 571 and the wall of the position-restricting hole 572 gradually increases in the process of moving the position-restricting portion 571 from the first end 573 to the second end 574 of the position-restricting hole 572.

Further, the hole wall of the limiting hole 572 includes a first plane 575 and a second plane 576 which are disposed opposite to each other, and a first inclined plane 577 and a second inclined plane 578 which are disposed opposite to each other, one end of the first inclined plane 577 and one end of the second inclined plane 578 are connected to two ends of the first plane 575, and the other end of the first inclined plane 577 and the other end of the second inclined plane 578 are connected to two ends of the second plane 576.

In the present embodiment, the shape of the limiting hole 572 is approximately a trapezoid, but not limited thereto. For example, the shape of the limiting hole 572 may also be a regular trapezoid, i.e. the slopes of the first inclined surface 577 and the second inclined surface 578 are not equal. Alternatively, the shape of the limiting hole 572 may be a triangle, preferably, an isosceles triangle.

Of course, in other embodiments, the aperture of the limiting aperture 572 may not be gradually increased along the direction from the first end 573 to the second end 574 of the limiting aperture 572, e.g., the wall of the limiting aperture 572 may further include an equal-diameter section and an expanded-diameter section. For example, from the first end 573 to the second end 574, the wall of the limiting hole 572 may sequentially include an expanded diameter section, an equal diameter section, and the like.

As shown in fig. 7, the position-restricting portion 571 has a first arc-shaped surface 571a, and the first arc-shaped surface 571a is used to achieve position restriction with the wall of the position-restricting hole 572 when the position-restricting portion 571 is located at the first end 573 of the position-restricting hole 572.

In the present embodiment, by designing the outer side wall of the limit part 571 to include the first arc surface 571a such that the first arc surface 571a is in line contact with the wall of the limit hole 572, the line contact reduces the friction force between the limit part 571 and the wall of the limit hole 572. When the limit part 571 and the limit hole 572 move relatively, jamming is less likely to occur.

The base 52 is provided with a stopper hole 572, and the movable member 53 includes a stopper 571. Of course, in other embodiments, the stopper hole 572 may be provided in the movable member 53, and the stopper 571 may be provided in the base 52.

As shown in fig. 5 to 8, in the present embodiment, the base 52 is provided with a stopper hole 572, and the second magnetizer 55 is provided with a stopper 571. The second magnetic conductor 55 includes a bottom 551, a first side 552, and a second side 553. The first side portion 552 and the second side portion 553 are connected to both ends of the bottom portion 551 along the width direction D3 of the movable contact spring 54. The first side portion 552 and the second side portion 553 are respectively provided on two opposite sides of the movable contact spring 54 in the width direction D3. Both the first side portion 552 and the second side portion 553 are provided with a limiting portion 571.

It is understood that the movement direction D1, the length direction D2, and the width direction D3 are perpendicular to each other.

The base 52 includes a base 521, a first limiting member 522 and a second limiting member 523 connected to the base 521 and disposed opposite to each other, a first side 552 disposed corresponding to the first limiting member 522, and a second side 553 disposed corresponding to the second limiting member 523, where both the first limiting member 522 and the second limiting member 523 have limiting holes 572.

A side surface of the first limiting member 522 facing the first side portion 552 and a side surface of the second limiting member 523 facing the second side portion 553 include a second arc-shaped surface 524.

In the present embodiment, by designing the side surface of the first stopper 522 facing the first side portion 552 and the side surface of the second stopper 523 facing the second side portion 553 to each include the second arc surface 524, the two second arc surfaces 524 are in line contact with the first side portion 552 and the second side portion 553, respectively, and the line contact reduces the friction force between the first side portion 552 and the first stopper 522 and the second side portion 553 and the second stopper 523. When the second magnetizer 55 moves relatively to the base 52, jamming is less likely to occur. Further, the contact chamber 101 of the relay can be prevented from being contaminated by the generation of the shavings.

The first side 552 and the second side 553 are located between the first stop 522 and the second stop 523. The side of the first side portion 552 facing away from the second side portion 553 and the side of the second side portion 553 facing away from the first side portion 552 are both provided with a limiting portion 571.

As an example, the limiting portion 571 may be formed by punching a side surface of the first side portion 552/the second side portion 553, such that the limiting portion 571 forms a punch structure. The specific location of the ram structure on the first side 552/second side 553 can be flexibly adjusted according to the structure.

In the present embodiment, since the two limiting portions 571 are respectively protruding on the side of the first side portion 552 away from the second side portion 553 and the side of the second side portion 553 away from the first side portion 552, the first side portion 552 and the second side portion 553 can be respectively in full contact with the first limiting member 522 and the second limiting member 523, so that stability of the second magnetizer 55 when limiting the base 52 is ensured, and magnetic conduction efficiency is not affected.

In an embodiment, the limiting portion 571 may be elongated. When the stopper 571 is located at the first end 573 of the stopper hole 572, the side surface of the elongated area is in contact with the wall of the stopper hole 572. By contacting the surface of the large area of the stopper 571 with the wall of the stopper hole 572, the swing of the movable reed 54 with respect to the base 52 in the initial state is effectively avoided, and the probability of rebound or rebound of the movable reed 54 is reduced.

As shown in fig. 9, fig. 9 is an exploded view of a push rod assembly 50 according to a second embodiment of the present invention. The second embodiment is the same as the first embodiment described above, and the difference is that:

The limit part 571 includes two convex hull structures. The two convex hull structures are spaced apart along the length direction D2 of the movable contact spring 54. The double convex hull structure effectively avoids the swing of the movable reed 54 relative to the base 52 in the initial state, and reduces the probability of rebound and rebound of the movable reed 54.

As shown in fig. 10, fig. 10 is an exploded view of a push rod assembly 50 according to a third embodiment of the present invention. The third embodiment is the same as the first embodiment described above, and the difference is that:

The limiting portion 571 is a rivet 579, and the rivet 579 is riveted to the first side portion 552/the second side portion 553 of the second magnetic conductor 55.

As shown in fig. 11, fig. 11 is an exploded view of a push rod assembly 50 according to a fourth embodiment of the present invention. The fourth embodiment is the same as the first embodiment described above, and the difference is that: the limiting portion 571 is disposed on the bottom 551 of the second magnetizer 55.

Specifically, second magnetic conductor 55 includes a bottom 551, a first side 552, and a second side 553. Along the width direction D3 of the movable spring 54, both opposite sides of the bottom 551 are provided with a stopper 571. The first side portion 552 and the second side portion 553 are connected to both ends of the bottom portion 551 along the width direction D3 of the movable contact spring 54, respectively. The first side portion 552 and the second side portion 553 are respectively provided on two opposite sides of the movable contact spring 54 in the width direction D3.

The base 52 includes a base 521, a first limiting member 522 and a second limiting member 523 connected to the base 521 and disposed opposite to each other, and limiting holes 572 are formed in the first limiting member 522 and the second limiting member 523.

As shown in fig. 12, fig. 12 is an exploded view of a push rod assembly 50 according to a fifth embodiment of the present invention. The fifth embodiment is the same as the first embodiment and is not described in detail, except that:

The base 52 includes a base 521, a first limiting member 522 and a second limiting member 523 connected to the base 521 and disposed opposite to each other, and limiting holes 572 are formed in the first limiting member 522 and the second limiting member 523. The movable member 53 further includes a fixing piece 58 fixedly connected to the second magnetizer 55, and limiting portions 571 are disposed on opposite sides of the fixing piece 58.

As shown in fig. 13, fig. 13 is an exploded view of a relay according to a second embodiment of the present invention. The relay of the second embodiment is the same as that of the first embodiment, and the difference is that:

The limiting parts 571 are convexly arranged on two opposite side edges of the base 52 of the push rod assembly 50. The movable member 53 further includes a fixing piece 58 fixedly connected to the second magnetizer 55, and the fixing piece 58 is provided with a limiting hole 572.

The fixing member 58 has an inverted U-shape, and the first end 573 and the second end 574 of the limiting hole 572 provided in the fixing member 58 are located just opposite to the limiting hole 572 of the above-described embodiment.

Specifically, as shown in fig. 13, the first end 573 of the limiting hole 572 is located below, and the second end 574 is located above, and the aperture of the second end 574 is larger than the aperture of the first end 573.

As shown in fig. 9-12, the first end 573 of the retaining hole 572 is located above and the second end 574 is located below.

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:

the contact container is provided with a contact chamber, a pair of first through holes and a second through hole, and the first through hole and the second through hole are communicated with the contact chamber;

The pair of stationary contact leading-out ends penetrate through the pair of first through holes in a one-to-one correspondence manner and are connected with the contact container;

The connecting piece is arranged in the second through hole in a penetrating way and comprises a first end and a second end, and the first end is connected with the contact container;

the first magnetizer is arranged in the contact cavity and is connected with the second end of the connecting piece; and

The push rod assembly comprises a movable reed and a second magnetizer fixedly connected with the movable reed, and the movable reed is arranged in the contact cavity and is used for contacting with or separating from a pair of stationary contact leading-out ends; the second magnetizer is arranged in the contact cavity and at least partially positioned at one side of the movable reed, which is opposite to the first magnetizer, and the second magnetizer is used for forming a magnetic conduction loop with the first magnetizer.

2. The relay of claim 1, wherein the contact receptacle comprises:

3. The relay according to claim 2, 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;

4. A relay according to claim 2, wherein,

The top wall and the side wall are of an integral structure; or, the top wall and the side wall are of a split structure and are connected through welding.

5. The relay of claim 2, wherein the first magnetic conductor is spaced from an inner wall surface of the top wall.

6. The relay of claim 1, wherein the second end of the connector is riveted or welded or glued to the first magnetically permeable body.

7. The relay of claim 1, wherein the first magnetically permeable body comprises a plurality of stacked magnetically permeable pieces coupled to the second end of the connector.

8. The relay of claim 1, wherein the push rod assembly further comprises:

a base;

9. The relay of claim 8, wherein the aperture of the second end is larger than the aperture of the first end.

10. The relay of claim 8, wherein the limit portion has a first arcuate surface for limiting with the limit aperture when the limit portion is at the first end of the limit aperture.

11. The relay of claim 9, wherein the limit portion is a rivet that is riveted to the second magnetic conductor.

12. The relay according to claim 8, wherein the movable member further includes a fixing member fixedly connected to the second magnetizer, one of the fixing member and the base is provided with the stopper portion, and the other of the fixing member and the base is provided with the stopper hole.