CN218385020U - Relay with a movable contact - Google Patents

Abstract

The embodiment of the utility model discloses relay, draw forth end, connecting piece, first magnetizer and push rod subassembly including contact container, a pair of stationary contact. The contact container is provided with a contact chamber, a pair of first through holes and 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 to the contact container; the connecting piece is arranged in the second through hole in a penetrating mode 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 chamber and is connected with the second end of the connecting piece; the push rod assembly comprises a movable spring and a second magnetizer fixedly connected with the movable spring, the movable spring is arranged in the contact cavity and is used for being contacted with or separated from the leading-out ends of the pair of static contacts, the second magnetizer is arranged in the contact cavity and is at least partially positioned on one side of the movable spring, which is back to the first magnetizer, and the second magnetizer is used for forming a magnetic conductive loop with the first magnetizer.

Description

Relay with a movable contact

Technical Field

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

Background

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

The high-voltage direct-current relay is one of relays, when a short-circuit load is large, a contact of the high-voltage direct-current relay can be popped off due to the fact that electric repulsion force is generated by short-circuit current, and the contact can be instantly popped off to cause the fact that the relay is burnt and explodes under the action of a strong arc.

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

However, since the push rod assembly needs to be supported by means of the holding force of the plunger, which is the electromagnetic force generated by the coil being energized, the holding force for supporting the anti-short-circuiting 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 cannot support the electromagnetic attraction force of the second magnetizer to the first magnetizer, the contact flicking still occurs. Furthermore, in the related art, the coil is enlarged to improve the holding force of the movable iron core, but the enlargement of the coil increases the volume of the relay.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a relay to improve relay's anti short-circuit current's performance, avoid the relay to take place to burn out, explosion under the strong arc effect.

The utility model provides a relay, including contact container, a pair of stationary contact leading-out terminal, connecting piece, first magnetizer and push rod subassembly, contact container has contact chamber, a pair of first through-hole and a second through-hole, first through-hole and the second through-hole all communicate in contact chamber; the pair of stationary contact leading-out ends are correspondingly arranged in the pair of first through holes in a penetrating mode and connected to the contact container; the connecting piece penetrates through the second through hole 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 chamber and is connected with the second end of the connecting piece; the pushing 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 or separating with the pair of stationary contact leading-out ends; the second magnetizer is arranged in the contact cavity, at least part of the second magnetizer is positioned on one side of the movable reed, which is back to the first magnetizer, and the second magnetizer is used for forming a magnetic conductive loop with the first magnetizer.

According to some embodiments of the invention, the contact container 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 hole and the second through hole are arranged on the top wall, and the first end of the connecting piece is connected with the outer wall surface of the top wall.

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

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

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

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

According to some embodiments of the utility model, the first magnetizer with the internal face interval of roof sets up.

According to some embodiments of the invention, the second end of the connecting piece is riveted or welded or glued to the first magnetic conductor.

According to some embodiments of the present invention, the first magnetizer includes a plurality of magnetic conductive plates stacked one on another, and the plurality of magnetic conductive plates are connected to the second end of the connecting member.

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

a base;

an elastic member, one end of which abuts against the base and the other end of which abuts against a movable member composed of the movable spring piece and the second magnetizer, the elastic member providing an elastic force so that the movable spring piece tends to move towards the stationary contact leading-out end;

a limit structure connected to the base and the movable member for limiting a moving 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 arranged between the first end and the second end of the limiting hole in a penetrating way;

when the movable spring is separated from the stationary 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 aperture of the second end is larger than the aperture of the first end.

According to some embodiments of the present invention, the spacing portion has a first arc surface, the first arc surface is used for the spacing portion is located in the spacing hole when the first end, with spacing hole realization is spacing.

According to some embodiments of the utility model, spacing portion is the rivet, the rivet riveting in the second magnetizer.

According to some embodiments of the invention, the movable member further comprises 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.

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

the utility model discloses relay through setting up the connecting piece for first magnetizer is connected on the contact container with the help of the connecting piece. On the one hand, first magnetizer is connected on the contact container, and does not follow up in the catch bar subassembly for the second magnetizer passes through the connecting piece to be used in on the contact container to the magnetic attraction of first magnetizer, because the position relatively fixed of contact container, can avoid the holding power of catch bar subassembly not enough like this and cause movable contact spring and stationary contact to draw forth the end and bounce, cause relay burnout, explosion. On the other hand, the contact container is provided with a second through hole, the connecting piece penetrates through the second through hole, so that 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 of shielding and visualization, the operation is convenient, and the connection reliability is ensured.

Drawings

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.

Fig. 3 showsbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A in fig. 2.

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

Figure 5 shows a schematic side view of a push rod assembly according to a first embodiment of the 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 B-B in fig. 5.

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

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

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

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

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

Fig. 14 is an exploded schematic view of a relay according to a 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 C-C in fig. 2.

Wherein the reference numerals are as follows:

10. contacting the container; 101. a contact chamber; 102. a first through hole; 103. a second through hole; 11a, an insulating cover; 11. a ceramic cover; 111. a top wall; 112. a side wall; 113. a first metallization layer; 114. a second metallization layer; 12. a frame piece; 13. a yoke iron plate; 131. a third through hole; 20. a stationary contact leading-out terminal; 30. a connecting member; 31. a first end of a connector; 32. a second end of the connector; 40. a first magnetizer; 41. a magnetic conductive sheet; 411. opening a hole; 50. a push rod assembly; 51. a rod portion; 52. a base; 521. a base; 522. a first limit piece; 523. a second limiting member; 524. a second arcuate surface; 53. a movable member; 54. a movable spring plate; 55. a second magnetizer; 551. a bottom; 552. a first side portion; 553. a second side portion; 56. an elastic member; 57. a limiting structure; 571. a limiting part; 571a, a first arc surface; 572. a limiting hole; 573. a first end of a limiting hole; 574. a second end of the limiting hole; 575. a first plane; 576. a second plane; 577. a first inclined plane; 578. a second inclined plane; 579. riveting; 58. a fixing member; 1100. a housing; 1110. a first housing; 1120. a second housing; 1130. exposing holes; 1200. an electromagnet unit; 1210. a bobbin; 1220. a coil; 1230. a stationary iron 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 clamp; 1400. a sealing unit; 1410. a metal cover; d1, the motion direction; d2, length direction; d3, width direction.

Detailed Description

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

As shown in fig. 14 to 16, fig. 14 is an exploded schematic view of a relay according to a first embodiment of the present invention. The relay includes a case 1100, an electromagnet unit 1200, an arc extinguishing unit 1300, and a sealing unit 1400. The sealing unit 1400 is disposed in the housing 1100, and the top of the stationary contact terminal of the sealing unit 1400 is exposed to the outer surface of the housing 1100 through the exposure hole 1130 of the housing 1100. The electromagnet unit 1200 and the arc extinguishing unit 1300 are both disposed within the housing 1100.

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

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

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

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

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

As shown in fig. 1 to 4, 15, and 16, fig. 1 is a perspective view schematically showing 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. Fig. 3 showsbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A in fig. 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 C-C in fig. 2.

The sealing unit 1400 of the embodiment of the present invention includes a contact container 10, a pair of stationary contact terminals 20, a connecting member 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 the first through hole 102 and the second through hole 103 are both communicated with the contact chamber 101. The pair of stationary contact terminals 20 are connected to the contact container 10 and are inserted 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, and the first end 31 is connected to the wall of the container contacting the container 10. The first magnetizer 40 is disposed in the contact chamber 101 and connected to the second end 32 of the connecting member 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 configured to contact or separate with the pair of stationary contact terminals 20, the second magnetizer 55 is disposed in the contact chamber 101 and is at least partially disposed on a side of the movable spring 54 facing away from the first magnetizer 40, and the second magnetizer 55 is configured to form a magnetic conductive loop with the first magnetizer 40.

It can be understood that, in the relay according to the embodiment of the present invention, the movable contact spring 54 is disposed between the first magnetizer 40 and the second magnetizer 55, and when the two ends of the movable contact spring 54 contact with the pair of stationary contact terminals 20, the second magnetizer 55 moving together with the movable contact spring 44 is close to or contacts the first magnetizer 40, so as to form a magnetic conductive loop around the movable contact spring 54 between the first magnetizer 40 and the second magnetizer 55. When the short-circuit current passes through the movable contact piece 54, a magnetic attraction force in the contact pressure direction is generated between the first magnetizer 40 and the second magnetizer 55, and the magnetic attraction force can resist the electric repulsion force generated between the movable contact piece 54 and the stationary contact leading-out terminal 20 due to the short-circuit current, so that the movable contact piece 54 and the stationary contact leading-out terminal 20 are prevented from being flicked.

As shown in fig. 16, when both ends of the movable spring 54 are disconnected from the pair of stationary contact terminals 20, no magnetic attraction is generated between the first magnetic conductor 40 and the second magnetic conductor 55 because no current flows through the movable spring 54.

The utility model discloses relay for through setting up connecting piece 30, make first magnetizer 40 connect on contact container 10 with the help of connecting piece 30. On one hand, the first magnetizer 40 is connected to the contact container 10 and does not follow the push rod assembly 50, so that the magnetic attraction of the second magnetizer 55 to the first magnetizer 40 acts on the contact container 10 through the connecting piece 30, and the position of the contact container 10 is relatively fixed, thereby avoiding the situation that the moving contact spring 54 and the stationary contact leading-out terminal 20 are bounced off due to insufficient holding force of the push rod assembly 50, and triggering the burning and explosion of the relay. On the other hand, the contact container 10 is provided with a second through hole 103, and the connecting member 30 is inserted into the second through hole 103, so that the connecting member 30 is connected with the contact container 10, and the first magnetizer 40 is connected with the connecting member 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 of shielding and visualization, the operation is convenient, and the connection reliability is ensured.

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

The contact vessel 10 includes a yoke plate 13 and an insulating cover 11a, and the insulating cover 11a is covered on one side of the yoke plate 13 to form a contact chamber 101 of the contact vessel 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 disposed 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 piece 12 may be a metal piece with a ring structure, such as iron-nickel alloy, and one end of the frame piece 12 is connected to the opening edge of the ceramic cover 11, for example, by laser welding, soldering, resistance welding, gluing, etc. The other end of the frame piece 12 is connected to the yoke plate 13, and may be welded by laser welding, brazing, resistance welding, gluing, or the like. A frame piece 12 is provided between the ceramic cover 11 and the yoke plate 13 to facilitate the connection of the ceramic cover 11 and the yoke plate 13.

Two quenching magnets 1310 are disposed on both sides of the ceramic cover 11, and two yoke clips 1320 surround the ceramic cover 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 is connected around the outer circumference of 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. The first through hole 102 and the second through hole 103 are 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 is understood that one of the pair of stationary contact terminals 20 serves as a terminal into which current flows, and the other serves as a terminal from which current flows. The stationary contact terminal 20 is inserted into the first through hole 102, and a part of the stationary contact terminal 20 extends into the contact chamber 101 for contacting with or separating from the movable spring 54. Part of the stationary contact terminal 20 is exposed to the outer wall surface of the ceramic cover 11.

The bottom of the stationary contact terminal 20 serves as a stationary contact, and both ends of the movable spring 54 in the length direction D2 thereof serve as movable contacts. The movable contact at the two ends of the movable contact spring 54 may protrude from other parts of the movable contact spring 54 or may be flush with the other parts.

It is understood 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 spring 54 in the length direction D2 thereof.

The second through hole 103 may be provided between the two first through holes 102, i.e., the connector 30 is provided between the pair of stationary contact terminals 20. The number of the second through holes 103 may be 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 connecting 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 reference to fig. 4, a first metallization layer 113 is disposed on the outer wall of the top wall 111 of the ceramic cover 11 around the first through hole 102, and a second metallization layer 114 is disposed on the outer wall of the second through hole 103. The stationary contact terminal 20 is welded to the top wall 111 through the first metallization 113, and the first end 31 of the connecting member 30 is welded to the top wall 111 through the second metallization 114.

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

The first magnetizer 40 is spaced apart from the inner wall surface of the top wall 111. That is, the length of the connecting member 30 is greater than the sum of the thickness of the top wall 111 and the thickness of the first magnetic conductor 40, so that the first magnetic conductor 40 is suspended from the top wall 111 of the ceramic cover 11 by the connecting 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 magnetic conductor 40 does not directly contact the inner wall surface of the top wall 111, the arrangement of the first magnetic conductor 40 does not affect the creepage distance of the pair of stationary contact terminals 20.

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

Of course, when the first magnetic conductor 40 includes a plurality of stacked magnetic conductive plates 41, the opening 411 of the magnetic conductive plate 41 located at the lowest position may also be a blind hole, and the openings 411 of the other magnetic conductive plates 41 are through holes. The connecting member 30 is inserted into each opening 411 of the other magnetic conductive plates 41, and the second end of the connecting member 30 extends into the blind hole of the magnetic conductive plate 41 located at the lowest position and is welded with the magnetic conductive plate 41.

In addition, when the first magnetic conductor 40 is a sheet, the first magnetic conductor 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 member 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 magnetic conductor 40.

As an example, when the short-circuit current reaches 10kA or more, the thickness of the first magnetic conductor 40 needs to be increased to generate a larger magnetic attraction force, so as to ensure that the magnetic attraction force between the first magnetic conductor 40 and the second magnetic conductor 55 can overcome the repulsion force generated by the short-circuit current, and prevent the movable contact spring 54 from bouncing off the stationary contact terminal 20. However, the first magnetic conductor 40 having a large thickness is expensive and difficult to connect with the ceramic cover 11.

In this embodiment, since the first magnetic conductor 40 is connected to the contact container 10 through the connecting member 30, the first magnetic conductor 40 may include a plurality of magnetic conductive sheets 41 stacked one on another, and the connecting member 30 penetrates through the second through holes 103 of the plurality of magnetic conductive sheets 41 for connection, so as to increase the overall thickness of the first magnetic conductor 40 by increasing the number of the magnetic conductive sheets 41 with a smaller thickness. On one hand, the thickness of the magnetic conductive sheet 41 is thin, and the magnetic conductive sheet can be made of thin strip materials, so that the material cost is low, 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 cover 11 may be of a separate structure and connected by welding. It will be appreciated that the connection of the connection member 30 to the top wall 111 is facilitated by designing the ceramic cover 11 as a separate structure of the top wall 111 and the side wall 112. Of course, the top wall 111 and the side wall 112 may be adhered to each other.

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

Of course, the top wall 111 and the side wall 112 of the ceramic hood 11 may also be of unitary construction.

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

In this embodiment, the second end 32 of the connecting member 30 is riveted with the first magnetizer 40. Specifically, the second end 32 of the connecting member 30 is connected to the first magnetizer 40 by expanding and riveting.

It is understood that the first magnetic conductor 40 may have a straight shape and the second magnetic conductor 55 may have a U shape. The first magnetizer 40 and the second magnetizer 55 may be made of iron, cobalt, nickel, and alloy thereof.

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

As shown in fig. 14 and 16, the sealing unit 1400 further includes a metal cover 1410, the metal cover 1410 is connected to a side of the yoke plate 13 facing away from the insulating cover 11a, and the metal cover 1410 covers the third through hole 131 on the yoke plate 13. The metal cover 1410 and the yoke plate 13 define a chamber for accommodating the stationary core 1230 and the movable core 1240 of the electromagnet unit 1200, which 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 movable iron core 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 formed by the movable spring 54 and the second magnetic conductor 55, and the elastic member 56 provides an elastic force so that the movable spring 54 tends to move toward the stationary contact terminal 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 have other configurations known in the art, and are not described in detail herein.

As shown in fig. 16, the electromagnet unit 1200 includes a coil bobbin 1210, a coil 1220, a stationary core 1230, a movable core 1240, and a restoring member 1250. The bobbin 1210 has a hollow cylindrical shape and is formed of an insulating material. The metal cap 1410 is inserted into the coil former 1210. A coil 1220 surrounds the bobbin 1210. The stationary iron core 1230 is fixedly disposed in the metal cover 1410, and a portion of the stationary iron core 1230 extends into the third through hole 131. The stationary iron core 1230 has a through hole 1231, and the through hole 1231 is disposed corresponding to the third through hole 131, and is used for the rod 51 to pass through. A movable iron core 1240 is movably disposed within the metal cover 1410 and disposed opposite the stationary iron core 1230, the movable iron core 1240 connecting the rod portion 51 for being attracted by the stationary iron core 1230 when the coil 1220 is energized. The plunger 1240 and the shaft 51 may be screwed, riveted, welded, or otherwise connected.

The reset member 1250 is disposed inside the metal cover 1410 and between the stationary core 1230 and the movable core 1240 to reset the movable core 1240 when the coil 1220 is de-energized. The restoring member 1250 may be a spring and is sleeved outside the rod part 51.

As shown in fig. 5 to 8, fig. 5 is 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 B-B in fig. 5.

The push rod assembly 50 also includes a limit structure 57, the limit structure 57 being connected to the base 52 and the movable member 53 for limiting the range of movement of the movable member 53 relative to the base 52. The position-limiting structure 57 includes a position-limiting hole 572 and a position-limiting portion 571, the position-limiting hole 572 includes a first end 573 and a second end 574 that are oppositely disposed along the moving direction D1 of the movable spring 54, the second end 574 has a larger aperture than the first end 573, and the position-limiting portion 571 is movably inserted between the first end 573 and the second end 574 of the position-limiting hole 572. When the movable contact spring 54 is separated from the stationary contact terminal 20, the stopper 571 is positioned at the first end 573 of the stopper hole 572.

In this embodiment, the base 52 is directly connected to the movable member 53 through the stopper 57, so that the assembly between the base and the movable member 53 is simpler. Also, since the remaining parts do not exist above the movable member 53, the remaining parts are prevented from moving to interfere with the first magnetic conductor 40 during the overtravel.

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

When the movable spring 54 is not in contact with the stationary contact terminal 20, the stopper 571 is positioned at the first end 573 of the stopper hole 572 by the elastic member 56. When the movable contact spring 54 contacts the stationary contact terminal 20 and the overtravel 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 the aperture of the first end 573, the limiting hole 572 has a structure of "one end is larger and the other end is smaller", and during the overtravel, the gap between the limiting part 571 and the hole wall of the limiting hole 572 is enlarged, so that the friction and jamming between the limiting part 571 and the hole wall of the limiting hole 572 can be prevented during the movement of the movable spring 54 relative to the base 52. Meanwhile, the first end 573 of the limiting hole 572 has a smaller aperture, which does not affect the limiting fit between the limiting part 571 and the limiting hole 572 in the initial state, and prevents the movable spring 54 from shaking relative to the base 52.

In order to achieve the initial position, the movable spring 54 and the base 52 are restricted, and the first end 573 of the restricting hole 572 has a hole diameter that is adapted to the shape of the restricting portion 571, so that the restricting portion 571 can restrict the hole wall of the restricting hole 572 when the restricting portion 571 is located at the first end 573 of the restricting hole 572.

With reference to fig. 5 to 8, the aperture of the limiting hole 572 gradually increases from the first end 573 to the second end 574 of the limiting hole 572. During the overtravel, the clearance between the stopper 571 and the hole wall of the stopper hole 572 gradually increases as the stopper 571 moves from the first end 573 to the second end 574 of the stopper hole 572.

Further, the hole wall of the limiting hole 572 includes a first plane 575 and a second plane 576 disposed opposite to each other and a first inclined plane 577 and a second inclined plane 578 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 limit hole 572 is substantially an isosceles trapezoid, but not limited thereto. For example, the shape of the limiting hole 572 can be a general trapezoid, i.e., the slope of the first inclined surface 577 is not equal to that of the second inclined surface 578. Alternatively, the shape of the limiting hole 572 may be a triangle, and preferably, the triangle may be an isosceles triangle.

Of course, in other embodiments, the aperture of the limiting hole 572 may not increase gradually along the direction from the first end 573 to the second end 574 of the limiting hole 572, for example, the hole wall of the limiting hole 572 may also include an equal-diameter section and a larger-diameter section. For example, the hole wall of the limiting hole 572 may sequentially include an expanding section, an equal diameter section, and the like from the first end 573 to the second end 574.

As shown in fig. 7, the first arc-shaped surface 571a is configured to limit the hole wall of the limiting hole 572 when the first arc-shaped surface 571a is located at the first end 573 of the limiting hole 572.

In the present embodiment, the outer sidewall of the position-limiting portion 571 is designed to include the first arc-shaped surface 571a, such that the first arc-shaped surface 571a is in line contact with the hole wall of the position-limiting hole 572, and the line contact reduces the friction between the position-limiting portion 571 and the hole wall of the position-limiting hole 572. When the position-limiting portion 571 and the position-limiting hole 572 move relatively, jamming is less likely to occur.

The base 52 has a stopper hole 572, and the movable member 53 includes a stopper portion 571. Of course, in another embodiment, 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 has a limiting hole 572, and the second magnetic conductor 55 has a limiting portion 571. The second magnetic conductor 55 includes a bottom portion 551, a first side portion 552, and a second side portion 553. The first side portion 552 and the second side portion 553 are connected to both ends of the bottom portion 551, respectively, in the width direction D3 of the movable spring 54. The first side portion 552 and the second side portion 553 are respectively provided at two opposite side edges in the width direction D3 of the movable spring 54. The first side portion 552 and the second side portion 553 are each provided with a stopper portion 571.

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

The base 52 includes a base 521, and a first limiting member 522 and a second limiting member 523 connected to the base 521 and disposed opposite to each other, wherein the first side portion 552 is disposed corresponding to the first limiting member 522, the second side portion 553 is disposed corresponding to the second limiting member 523, and both the first limiting member 522 and the second limiting member 523 have a limiting hole 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 surface 524.

In the present embodiment, by designing the side surface of the first limiting member 522 facing the first side portion 552 and the side surface of the second limiting member 523 facing the second side portion 553 to both include the second arc-shaped surfaces 524, so that the two second arc-shaped surfaces 524 are in line contact with the first side portion 552 and the second side portion 553, respectively, the line contact reduces the friction between the first side portion 552 and the first limiting member 522 and between the second side portion 553 and the second limiting member 523. When the second magnetic conductor 55 relatively moves with respect to the base 52, jamming is less likely to occur. Furthermore, the contact chamber 101 of the relay can be prevented from being contaminated by the generation of shavings.

The first and second side portions 552 and 553 are located between the first and second stoppers 522 and 523. A side of the first side portion 552 away from the second side portion 553 and a side of the second side portion 553 away from the first side portion 552 are both provided with a protruding limiting portion 571 in a protruding manner.

As an example, the position-limiting portion 571 may be formed by punching the side surfaces of the first side portion 552/the second side portion 553, so that the position-limiting portion 571 forms a bract structure. The specific positions of the bract structure on the first side 552/the second side 553 can be flexibly adjusted according to the structure.

In this embodiment, since the two position-limiting portions 571 are respectively protruded on a side of the first side portion 552 away from the second side portion 553, and a 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 fully contacted with the first position-limiting member 522 and the second position-limiting member 523, so as to ensure stability of the second magnetic conductor 55 when the position-limiting is performed with the base 52, and magnetic conduction efficiency is not affected.

In one embodiment, the position-limiting portion 571 may be a long strip. When the stopper 571 is located at the first end 573 of the stopper hole 572, the side surface with the larger strip-shaped area contacts with the hole wall of the stopper hole 572. By contacting the surface of the stopper 571 having a large area with the hole wall of the stopper hole 572, the movable contact spring 54 is effectively prevented from swinging with respect to the base 52 in the initial state, and the probability of the movable contact spring 54 bouncing back and rebounding 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 parts of the second embodiment that are the same as the parts of the first embodiment are not repeated, and the differences are as follows:

the position-limiting portion 571 includes two convex hull structures. The two convex hull structures are spaced apart along the length direction D2 of the movable spring 54. Due to the design of the double-convex-bag structure, the movable spring plate 54 is effectively prevented from swinging relative to the base 52 in the initial state, and the probability of rebound of the movable spring plate 54 is reduced.

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 parts of the third embodiment that are the same as the parts of the first embodiment are not described again, and the differences are as follows:

the stopper 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 magnetizer 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 parts of the fourth embodiment that are the same as the parts of the first embodiment are not repeated, but the differences are as follows: the position-limiting portion 571 is disposed on the bottom 551 of the second magnetic conductor 55.

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

The base 52 includes a base 521, and a first limiting member 522 and a second limiting member 523 connected to the base 521 and disposed oppositely, wherein both the first limiting member 522 and the second limiting member 523 have a limiting hole 572.

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 parts of the fifth embodiment that are the same as the parts of the first embodiment will not be described again, and the differences are as follows:

the base 52 includes a base 521, and a first limiting member 522 and a second limiting member 523 connected to the base 521 and disposed oppositely, and both the first limiting member 522 and the second limiting member 523 have a limiting hole 572. The movable member 53 further includes a fixing member 58 fixedly connected to the second magnetizer 55, and two opposite sides of the fixing member 58 are provided with position-limiting portions 571.

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

the position-limiting part 571 is protruded from two opposite sides of the base 52 of the push rod assembly 50. The movable member 53 further includes a fixing member 58 fixedly connected to the second magnetizer 55, and the fixing member 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 stopper hole 572 provided in the fixing member 58 are positioned just opposite to the stopper hole 572 of the above-described embodiment.

Specifically, as shown in FIG. 13, the first end 573 of the retaining hole 572 is positioned below and the second end 574 is positioned above, the second end 574 having a larger aperture than 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 is understood that the various embodiments/implementations provided by the present invention can be combined without contradiction, and are not illustrated herein.

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

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

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

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

Claims (12)

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 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 to the contact container;

the connecting piece is arranged in the second through hole in a penetrating mode 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 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 being in contact with or separated from the pair of stationary contact leading-out ends; the second magnetizer is arranged in the contact cavity, at least part of the second magnetizer is positioned on one side of the movable reed, which is back to the first magnetizer, and the second magnetizer is used for forming a magnetic conductive loop with the first magnetizer.

2. The relay according to claim 1, wherein the contact receptacle 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 hole and the second through hole are arranged on the top wall, and the first end of the connecting piece is connected with the outer wall surface of the top wall.

3. The relay according to claim 2, wherein said insulating cover comprises a ceramic cover and a frame piece, said ceramic cover comprising said top wall and said side wall, the other end of said side wall being connected to said yoke plate by said frame piece;

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

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

4. The relay according to claim 2,

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

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

6. The relay according to claim 1, wherein the second end of the connector is riveted or welded or glued to the first magnetic conductor.

7. The relay according to claim 1, wherein said first magnetically conductive member comprises a plurality of stacked magnetically conductive plates, said plurality of magnetically conductive plates being connected to said second end of said connecting member.

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

a base;

the elastic piece is abutted against the base at one end, and is abutted against a movable component formed by the movable spring piece and the second magnetizer at the other end, and the elastic piece provides elastic force so that the movable spring piece tends to move towards the leading-out end of the static contact;

a limit structure connected to the base and the movable member for limiting a moving 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 arranged between the first end and the second end of the limiting hole in a penetrating way;

when the movable spring is separated from the stationary contact leading-out end, the limiting part is positioned at the first end of the limiting hole.

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

10. The relay according to claim 8, wherein the position-limiting portion has a first arcuate surface for effecting a position limitation with the position-limiting hole when the position-limiting portion is located at the first end of the position-limiting hole.

11. The relay according to claim 9, wherein the stopper portion is a rivet riveted to the second magnetic conductor.

12. The relay according to claim 8, wherein the movable member further comprises a fixing member fixedly attached to the second magnetic conductor, one of the fixing member and the base is provided with the position-restricting portion, and the other of the fixing member and the base is provided with the position-restricting hole.

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