Relay contact assembly and relay

Abstract

The invention provides a relay contact assembly and a relay, and relates to the technical field of electric power. The relay contact assembly comprises a pair of static contact leading-out ends, a movable contact spring, a first arc isolating piece and a second arc isolating piece, wherein the movable contact spring is used for being in contact with or separated from the pair of static contact leading-out ends; the first arc isolating piece is arranged outside the static contact leading-out end and is used for blocking arc transfer; and the second arc isolating piece is arranged on the movable contact spring and is used for blocking arc transfer. Under the combined action of the first arc-isolating piece and the second arc-isolating piece, the risk that the arc ablates the peripheral side wall of the stationary contact leading-out end and the peripheral side wall of the movable contact spring is reduced, the arc can be isolated more comprehensively, the transfer of the arc is hindered, and the thoroughness of arc extinguishing is improved.

Description

Technical Field

[0001] The present invention generally relates to the field of electric power technology, and in particular, to a relay contact assembly and a relay. Background Art

[0002] A relay is an electronic control device used in automatic control circuits. The relay has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). In fact, it is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit. As a type of relay, most of the existing high-voltage DC relays use a direct-acting structure with a moving reed, that is, they use the cooperation of two static contacts and a moving reed to connect and disconnect the load.

[0003] The principle of breaking load of high-voltage DC relay is to generate directional magnetic blowing magnetic field by setting permanent magnets. When the moving and static contacts separate and generate arc, the arc is rapidly elongated by the magnetic blowing magnetic field until the arc is disconnected. The disconnection of arc also achieves load breaking. Among them, the most stringent breaking is called "limit breaking". The load of limit breaking is several times the rated load. If the arc is not stable enough at the moving and static contacts, the arc will transfer on the surface of the moving and static contacts, which will cause the arc to fail to extinguish mainly along the magnetic blowing arc path, and finally lead to the inability to break the arc. The product will explode and burn due to overload and overheating.

[0004] In addition, in order to meet the requirements of short-circuit resistance, existing high-voltage DC relays usually have soft magnetic bodies, i.e., anti-short-circuit rings, near the internal moving and static contacts, so as to generate electromagnetic attraction to resist the electromotive repulsion when the short-circuit current passes through. However, since soft magnetic bodies will be magnetized near the current-carrying conductor, they will have an attractive effect on the arc.

[0005] Due to the setting of the soft magnetic body, i.e. the anti-short circuit ring, when the relay is in the limit breaking state, the arc is not only affected by the magnetic blown magnetic field, but also by the magnetized soft magnetic body, which leads to arc disorder and reduces the "limit breaking" capability of the high voltage DC relay. At the same time, it will also cause the short circuit ring to burn out, affecting the anti-short circuit effect. If an auxiliary contact is set above the short circuit ring, the arc will also burn out the auxiliary contact. Summary of the invention

[0006] The present invention provides a relay contact assembly and a relay, which improve the reliability of arc breaking and have good safety.

[0007] According to a first aspect of the present invention, there is provided a relay contact assembly, comprising:

[0008] A pair of static contact terminals;

[0009] A moving reed, used to contact or separate with a pair of static contact lead-out terminals;

[0010] A first arc-isolating member, arranged outside the static contact lead-out end, for preventing arc transfer;

[0011] The second arc-isolating member is installed on the movable spring piece and is used for preventing the arc from transferring.

[0012] In some embodiments, the first arc-isolating member is sleeved on the outside of the static contact lead-out end; and / or,

[0013] The second arc isolation member is sleeved on the outer wall of the movable spring piece.

[0014] In some embodiments, a first step and / or a first gap is provided between the first arc-isolating member and the static contact lead-out end to prevent arc transfer.

[0015] In some embodiments, the first arc-isolating member protrudes from the outer peripheral wall of the static contact lead-out end, and the first step is formed between the bottom wall of the first arc-isolating member facing one end of the movable spring piece and the outer peripheral wall of the static contact lead-out end corresponding thereto.

[0016] In some embodiments, the first gap is disposed between an inner wall of a bottom portion of the first arc-isolating member facing one end of the movable spring and an outer peripheral wall of the static contact lead-out end.

[0017] In some embodiments, one of the inner wall of the first arc isolation member and the outer wall of the static contact lead-out end is provided with a limiting portion, and the other is provided with a positioning matching portion, and the limiting portion is snap-fitted into the positioning matching portion.

[0018] In some embodiments, a static contact is provided at the bottom of the static contact lead-out end, and the outer peripheral wall of the first arc-isolating member protrudes from the outer peripheral wall of the static contact;

[0019] Wherein, the static contact lead-out terminal and the static contact are an integrally formed structure or a split structure.

[0020] In some embodiments, the first gap is provided with an open end toward an end away from the movable spring piece, and the end of the first gap away from the movable spring piece is a closed end.

[0021] In some embodiments, the first gap is disposed between an inner peripheral wall of a bottom portion of the first arc-isolating member and an outer peripheral wall of a bottom portion of the static contact lead-out terminal.

[0022] In some embodiments, the part where the movable spring piece contacts the lead-out terminals of the pair of static contacts is the first contact part, and at least part of the first step and / or the first gap is arranged between the inner edges of the first contact part. In some embodiments, a second step is arranged between the second arc-isolating member and the movable spring piece to prevent arc transfer; and / or,

[0023] A second gap is provided between the second arc-isolating member and the movable spring piece to prevent arc transfer.

[0024] In some embodiments, the portion where the movable spring piece contacts the pair of static contact lead-out terminals is a first contact portion, and the second step and / or the second gap is arranged between inner edges of the first contact portion.

[0025] In some embodiments, the second arc-isolating member includes a column, and the top of the column toward the static contact lead-out terminal protrudes from the top surface of the movable spring piece toward the static contact lead-out terminal, so that the second step is formed between the top of the column and the top surface of the movable spring piece.

[0026] In some embodiments, a mounting groove is provided on the side wall of the movable spring, the column is at least partially disposed in the mounting groove, and the second gap is disposed between the column and the mounting groove.

[0027] In some embodiments, the second gap is arranged along the axial direction of the column.

[0028] In some embodiments, one end of the second gap facing the static contact lead-out terminal is provided with an open end, and one end of the second gap facing away from the static contact lead-out terminal is a closed end.

[0029] In some embodiments, the mounting groove includes a first mounting portion, the first mounting portion is arranged on a side of the moving spring piece facing the static contact lead-out end, the column passes through the first mounting portion, and the second gap is arranged between the column and the first mounting portion.

[0030] In some embodiments, the second gap is a trumpet-shaped structure, and the wide-mouth end of the second gap is arranged toward the static contact lead-out end.

[0031] In some embodiments, the mounting groove further includes a fixing portion, the fixing portion is communicated with the first mounting portion, and the column is clamped to the fixing portion for fixing the second arc isolation member.

[0032] In some embodiments, the mounting groove also includes a second mounting portion, the second mounting portion is arranged on a side of the moving spring away from the static contact lead-out end, the second mounting portion is connected to the first mounting portion through the fixing portion, the column is passed through the second mounting portion and a second guide gap is provided between the outer wall of the column and the inner wall of the second mounting portion, and the second guide gap is used for guiding the column.

[0033] In some embodiments, the number of the columns and the mounting grooves is two, the two mounting grooves are arranged on both sides of the movable spring piece along the width direction of the movable spring piece and between the inner edges of the two first contact portions, and the two columns are arranged corresponding to the two mounting grooves.

[0034] In some embodiments, the second arc isolation member further includes a limiting portion, which is disposed on a side of the column away from the movable spring sheet and can abut against the movable spring sheet for limiting the position of the column.

[0035] In some embodiments, the second arc isolation member further includes an arc isolation ring, which wraps around the end of the movable reed along the length direction of the movable reed and at least a portion of the side wall of the movable reed to prevent arc transfer.

[0036] In some embodiments, the second arc isolation member further includes a connecting portion, which is disposed at the bottom of the end of the moving spring piece away from the static contact lead-out end and is respectively connected to both ends of the arc isolation ring, and the column is disposed at the connecting portion.

[0037] In some embodiments, the number of the second arc-isolating members is two, and the two second arc-isolating members are respectively disposed at two ends of the movable spring piece along the length direction of the movable spring piece.

[0038] In some embodiments, the first arc-isolating member and the second arc-isolating member are both made of insulating material.

[0039] In some embodiments, an arc isolation portion is provided on the side of the movable spring piece facing the static contact lead-out end, and the arc isolation portion is used to prevent the arc from moving along the top surface of the movable spring piece on the side facing the static contact lead-out end and in the direction of the pair of static contact lead-out ends approaching each other.

[0040] In some embodiments, the arc isolation portion is a first arc isolation groove; and / or,

[0041] The arc isolation portion is an arc isolation rib.

[0042] In some embodiments, the portion where the movable spring piece contacts the pair of static contact lead-out terminals is a first contact portion, and the arc-isolating portion is disposed between inner edges of the first contact portion.

[0043] According to a second aspect of the present invention, a relay according to an embodiment of the present invention includes the above-mentioned relay contact assembly.

[0044] In some embodiments, the relay further includes an anti-short circuit component, which is disposed at least on one side of the movable reed piece facing the static contact lead-out terminal, and generates suction force when a large fault current occurs in the movable reed piece, so as to resist the electric repulsion between the movable reed piece and the static contact lead-out terminal.

[0045] An embodiment of the present invention has the following advantages or beneficial effects:

[0046] In the relay contact assembly and relay provided by the embodiment of the present invention, the movable spring piece contacts or separates with a pair of static contact lead-out terminals. When the movable spring piece contacts with the static contact at the bottom of the pair of static contact lead-out terminals, the current flows into one static contact lead-out terminal and flows out from the other static contact lead-out terminal after passing through the movable spring piece, thereby realizing the connection of the load. When the movable spring piece and the static contact at the bottom of the pair of static contact lead-out terminals are separated, the contact is disconnected with load, and an arc is generated between the contacts. When the arc moves up and down along the outer wall of the static contact lead-out terminal under the action of the magnetic field, the first arc-isolating member is arranged on the outer wall of the static contact lead-out terminal, which can block the transfer of the arc and reduce the ablation of the arc on the peripheral side wall of the static contact lead-out terminal. At the same time, the second arc-isolating member is installed on the movable spring piece, and the first arc-isolating member is closer to the arc starting point, which better hinders the transfer of the arc. It can further prevent the arc from being attracted by the short-circuit ring so that the arc is attracted toward each other along the contacts, thereby preventing the insulation between the contacts from decreasing or the arc from short-circuiting.

[0047] Under the joint action of the first arc-isolating member and the second arc-isolating member, the transfer range of the arc is limited to between the moving spring piece and the static contact lead-out end, which can more comprehensively isolate the arc, hinder the transfer of the arc, and improve the arc extinguishing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to better understand the present invention, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present invention. In addition, related elements or components may have different settings as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each of the drawings. The above and other features and advantages of the present invention will become more apparent by describing in detail its exemplary embodiments with reference to the drawings.

[0049] in:

[0050] Figure 1 The structure of the relay provided by the first embodiment of the present invention is shown in FIG. Figure 1 ;

[0051] Figure 2 It shows Figure 1 Sectional view at AA;

[0052] Figure 3 The figure shows the explosion of the relay provided in the first embodiment of the present invention. Figure 1 ;

[0053] Figure 4 The figure shows the coordination between the static contact lead-out terminal and the first arc-isolating member in the relay provided in the first embodiment of the present invention. Figure 1 ;

[0054] Figure 5 The figure shows the coordination between the static contact lead-out terminal and the first arc-isolating member in the relay provided in the first embodiment of the present invention. Figure 2 ;

[0055] Figure 6 It shows Figure 5 Cross-sectional view at CC;

[0056] Figure 7 It shows Figure 2 A partial enlarged view showing the first arc isolation member;

[0057] Figure 8 The figure shows the cooperation between the moving spring and the second arc-isolating member in the relay provided by the first embodiment of the present invention. Figure 1 ;

[0058] Fig. 9 The figure shows the cooperation between the moving spring and the second arc-isolating member in the relay provided by the first embodiment of the present invention. Figure 2 ;

[0059] Fig.10 It shows Fig. 9 A cross-sectional view at B1-B1;

[0060] Fig.11 It shows Fig. 9 A partial enlarged view at B2;

[0061] Fig.12 The figure shows the cooperation between the moving spring and the second arc-isolating member in the relay provided by the first embodiment of the present invention. Figure 3 ;

[0062] Fig.13 It shows Fig.12 A cross-sectional view at B3-B3;

[0063] Fig.14 It shows Fig.12 A partial enlarged view at B4;

[0064] Fig.15 The figure shows the explosion of the relay provided in the first embodiment of the present invention. Figure 2 ;

[0065] Fig.16 The figure shows the structure of the moving spring in the relay provided by the first embodiment of the present invention. Figure 1 ;

[0066] Fig.17 The figure shows the structure of the moving spring in the relay provided by the first embodiment of the present invention. Figure 2 ;

[0067] Fig.18 The structure of the relay provided by the first embodiment of the present invention is shown in FIG. Figure 2 ;

[0068] Fig.19 The diagram shows a schematic diagram of the structure of a contact container in a relay provided in the first embodiment of the present invention;

[0069] Fig. 20 The figure shows the structure of the moving spring in the relay provided by the second embodiment of the present invention. Figure 1 ;

[0070] Fig.21 The figure shows the structure of the moving spring in the relay provided by the second embodiment of the present invention. Figure 2 ;

[0071] Fig. 22 The figure shows the structure of the moving spring in the relay provided by the second embodiment of the present invention. Figure 3 ;

[0072] Fig.23 The figure shows the structure of the moving spring in the relay provided by the second embodiment of the present invention. Figure 4 ;

[0073] Fig.24 The figure shows the structure of the moving spring in the relay provided by the second embodiment of the present invention. Figure 5 ;

[0074] Fig.25 The figure shows the structure of the moving spring in the relay provided by the second embodiment of the present invention. Figure 6 ;

[0075] Fig.26 The figure shows the structure of the moving spring in the relay provided by the third embodiment of the present invention. Figure 1 ;

[0076] Fig. 27The figure shows the structure of the moving spring in the relay provided by the third embodiment of the present invention. Figure 2 .

[0077] The reference numerals are described as follows:

[0078] 1. Contact container; 2. Relay contact assembly; 3. Anti-short circuit assembly; 4. Push assembly; 5. Arc extinguishing unit; 6. First arc isolation member; 7. Second arc isolation member;

[0079] 11. Insulation cover; 12. Frame piece;

[0080] 21. static contact lead-out terminal; 211. positioning matching portion;

[0081] 22, movable spring; 220, first contact portion; 221, thrust portion; 2211, through hole; 222, first arc isolation groove;

[0082] 223, mounting groove; 2231, first mounting portion; 2232, fixing portion; 2233, second mounting portion; 225, arc-isolating rib;

[0083] 31. Upper magnetic conductor; 32. Lower magnetic conductor;

[0084] 41. push rod unit; 411. push rod; 412. limit protrusion; 413. base;

[0085] 42. U-shaped bracket; 43. elastic member;

[0086] 44, electromagnet unit; 441, coil frame; 442, coil; 443, moving iron core; 444, static iron core; 445, U-shaped yoke; 446, magnetic tube; 447, spring;

[0087] 51. Arc extinguishing magnet; 52. Yoke iron clamp;

[0088] 60. first gap; 61. first step; 62. positioning portion; 63. first guide gap;

[0089] 70. Column; 71. Second step; 72. Second gap; 73. Second guide gap; 74. Limiting portion; 75. Arc isolation ring; 76. Connecting portion. DETAILED DESCRIPTION

[0090] The following will be combined with the accompanying drawings in the exemplary embodiments of the present invention to clearly and completely describe the technical solutions in the exemplary embodiments of the present invention. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present invention.

[0091] In the description of the present invention, unless otherwise clearly specified and limited, the terms "second" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0092] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0093] Further, in the description of the present invention, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present invention are described at the angles shown in the accompanying drawings and should not be understood as limiting the exemplary embodiments of the present invention. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", "inner", "outer", but also can be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0094] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0095] Embodiment 1

[0096] This embodiment provides a relay contact assembly 2, such as Figure 1-Figure 3 As shown, the relay contact assembly 2 includes a movable reed 22 and a pair of stationary contact lead-out terminals 21 . The movable reed 22 is used to contact or separate from the pair of stationary contact lead-out terminals 21 .

[0097] In the relay contact assembly 2 provided in this embodiment, the movable spring 22 contacts or separates from a pair of stationary contact lead-out terminals 21. When the movable spring 22 contacts the stationary contacts at the bottom of the pair of stationary contact lead-out terminals 21, current flows into one stationary contact lead-out terminal 21, passes through the movable spring 22, and then flows out from the other stationary contact lead-out terminal 21, thereby connecting the load.

[0098] In one embodiment, a static contact is disposed at the bottom of the static contact lead-out terminal 21; wherein the static contact lead-out terminal 21 and the static contact are an integrally formed structure or a split structure.

[0099] Specifically, the bottom of the static contact lead-out terminal 21 can be directly used as the static contact, or the static contact can be integrally or separately arranged at the bottom of the static contact lead-out terminal 21 .

[0100] When the moving reed 22 and the static contacts at the bottom of a pair of static contact lead-out terminals 21 are separated, as the moving and static contacts between the moving reed 22 and the static contact lead-out terminals 21 are separated and the arc is drawn by magnetic blowing, if the arc is elongated to a certain extent, the arc will automatically break; if the arc is not stable enough at the moving and static contacts, the arc will transfer on the surface of the moving reed 22 or the static contact, which will cause the arc to be unable to extinguish mainly along the magnetic blowing arc path, and finally cause the arc to be unable to be disconnected, and even the relay will explode and burn.

[0101] To solve this problem, Figure 1-Figure 3 As shown, the relay contact assembly 2 provided in this embodiment further includes a first arc-isolating member 6 and a second arc-isolating member 7. The first arc-isolating member 6 is arranged outside the static contact lead-out terminal 21 to prevent arc transfer. The second arc-isolating member 7 is installed on the moving spring piece 22 to prevent arc transfer.

[0102] In the relay contact assembly 2 provided in this embodiment, when the arc moves up and down along the outer wall of the static contact lead-out terminal 21 under the action of the magnetic field, the first arc-isolating member 6 is arranged outside the static contact lead-out terminal 21. Under the action of the first arc-isolating member 6, the risk of the arc burning the peripheral side wall of the static contact lead-out terminal 21 is reduced. The second arc-isolating member 7 is installed on the moving spring 22, and the first arc-isolating member 6 is closer to the arc starting point, which better hinders the transfer of the arc.

[0103] In one embodiment, the first arc isolation member 6 is made of insulating material.

[0104] Specifically, the first arc-isolating member 6 can be made of insulating materials such as ceramics, glass, rubber or plastic. The first arc-isolating member 6 made of insulating materials has good arc-breaking or arc-cooling performance, strong arc-extinguishing ability and good arc-extinguishing effect.

[0105] It can be understood that in some other embodiments, the first arc isolation member 6 can also be made of metal material.

[0106] In one embodiment, Figure 4-Figure 5 As shown, the first arc-isolating member 6 is located in the insulating cover 11 and is sleeved on the outside of the static contact lead-out terminal 21 .

[0107] The first arc-isolating member 6 can also be called an arc-isolating sleeve. The first arc-isolating member 6 is sleeved on the outside of the static contact lead-out terminal 21 to perform arc-isolating treatment on the outer peripheral side of the contact area corresponding to the static contact of the static contact lead-out terminal 21, which can isolate the arc more comprehensively and is conducive to arc extinguishing.

[0108] It should be particularly noted that it is understandable that the first arc-isolating member 6 is sleeved on the static contact lead-out terminal 21, and the first arc-isolating member 6 includes but is not limited to a cylindrical shape, an elliptical cylindrical shape, a square cylindrical shape, a polygonal cylindrical shape, and the like.

[0109] In one embodiment, the first arc-isolating member 6 is a closed ring structure arranged around the static contact lead-out terminal 21; or, the first arc-isolating member 6 is distributed around the static contact lead-out terminal 21 in a ring-shaped manner.

[0110] Specifically, the first arc-isolating member 6 can be an integrated structure. For example, the first arc-isolating member 6 is an integrated cylindrical or annular sleeve on the outside of the static contact lead-out terminal 21. The integrated molding structure reduces the parts assembly process and has a relatively low production cost.

[0111] Specifically, the first arc-isolating member 6 can also be a split structure, and the first arc-isolating member 6 includes a plurality of insulating monomers, which are arranged along the circumference of the static contact lead-out terminal 21 and can be connected end to end to form a cylindrical, polygonal cylindrical, etc. structure. In some other embodiments, the plurality of insulating monomers can also surround the outside of the static contact lead-out terminal 21 and be distributed in an annular interval, or a single insulating monomer can be arranged outside the static contact lead-out terminal 21, as long as the insulation and arc extinguishing effects can be achieved, this embodiment is not limited here.

[0112] In one embodiment, Figure 5-Figure 7 As shown, a first step 61 and / or a first gap 60 is provided between the first arc-isolating member 6 and the static contact lead-out terminal 21 to prevent the arc from transferring along the outer wall of the static contact lead-out terminal 21 and away from the moving reed 22 .

[0113] A first step 61 and / or a first gap 60 are provided at the contact position between the first arc-isolating member 6 and the static contact lead-out terminal 21 and on the path of the arc movement, that is, a bend is formed on the arc path, which can consume the kinetic energy of the arc and better block the transfer of the arc. The arc transfer direction has two directions: first, the first step 61 and / or the first gap 60 can block the arc from transferring in the direction of a pair of static contact lead-out terminals 21 approaching each other, avoiding the situation that the two groups of dynamic and static contacts between the dynamic spring piece 22 and the pair of static contact lead-out terminals 21 produce an arc short circuit; second, the first step 61 and / or the first gap 60 can block the arc from transferring upward along the outer wall of the static contact lead-out terminal 21 in the direction away from the dynamic spring piece 22, further reducing the arc erosion of the outer wall of the static contact lead-out terminal 21, improving the arc extinguishing ability and effect, and thus improving the load breaking ability between the dynamic contact and the static contact corresponding to the dynamic spring piece 22 and the static contact lead-out terminal 21.

[0114] In one embodiment, Figure 7 As shown, the outer peripheral wall of the first arc isolation member 6 protrudes from the outer peripheral wall of the static contact lead-out terminal 21 , and a first step 61 is formed between the bottom wall of the first arc isolation member 6 and the outer peripheral wall of the static contact lead-out terminal 21 corresponding thereto.

[0115] If the outer peripheral wall of the first arc-isolating member 6 and the outer peripheral wall of the static contact lead-out terminal 21 are not coplanar, or the first arc-isolating member 6 is not embedded in the outer peripheral wall of the static contact lead-out terminal 21, a first step 61 is formed between the bottom wall of the first arc-isolating member 6 and the outer peripheral wall of the static contact lead-out terminal 21 corresponding thereto. The first step 61 is closer to the arc starting point, which limits the arc from moving up along the surface of the static contact lead-out terminal 21, thereby reducing the arc erosion of the outer peripheral wall of the static contact lead-out terminal 21 and in the direction away from the moving reed 22, so as to achieve the purpose of losing arc energy.

[0116] The outer peripheral wall of the first arc-isolating member 6 protrudes from the outer peripheral wall of the static contact.

[0117] The outer peripheral wall of the first arc-isolating member 6 protrudes from the outer peripheral wall of the static contact and is not arranged coplanarly. The static contact is located below the first arc-isolating member 6 to form a first step 61 between the bottom wall of the first arc-isolating member 6 and the outer peripheral wall of the corresponding static contact. The first step 61 is closer to the arc starting point, thereby reducing the arc's ablation of the outer peripheral wall of the static contact lead-out terminal 21 and in a direction away from the moving spring piece 22, thereby achieving protection of the static contact lead-out terminal 21.

[0118] In one embodiment, Figure 7 As shown, the first gap 60 is provided between the inner wall of the bottom of the first arc isolation member 6 and the outer wall of the static contact lead-out terminal 21. Specifically, the first gap 60 is provided between the inner peripheral wall of the bottom of the first arc isolation member 6 and the outer peripheral wall of the bottom of the static contact lead-out terminal 21.

[0119] The connection between the bottom end face and the inner wall surface of the first arc-isolating member 6 is an edge, and the arc moves to the edge to form a concentrated arc. At the same time, due to the existence of the first gap 60, a part of the arc can enter the first gap 60 to form a height difference in the arc transfer path. This height difference makes it difficult for the arc to move away from the moving spring piece 22. The combination of the edge and the height difference is used to hinder the arc transfer.

[0120] In one embodiment, an end of the first gap 60 facing the movable spring piece 22 is provided with an open end, and an end of the first gap 60 away from the movable spring piece 22 is a closed end.

[0121] The open end of the first gap 60 is used to introduce the arc, and the first gap 60 has a closed end, so that the first gap 60 does not completely penetrate the structure, thereby forming a bend in the arc path.

[0122] It should be particularly noted that the arc isolation structure provided in this embodiment can simultaneously have a first arc isolation member 6, a first step 61 and a first gap 60. The first step 61 and the first gap 60 form a partial arc isolation structure for limiting the arc from transferring along the static contact lead-out terminal 21 and in a direction away from the moving reed piece 22 and can limit the arc from transferring in the direction of the center line of the moving reed piece 22. The first arc isolation member 6 made of insulating material has the ability to break the arc or cool the arc to achieve the effect of extinguishing the arc.

[0123] In one embodiment, Figure 7 As shown, one of the inner wall of the first arc-isolating member 6 and the outer wall of the static contact lead-out terminal 21 is provided with a positioning portion 62 , and the other is provided with a positioning matching portion 211 , and the positioning portion 62 is snap-connected to the positioning matching portion 211 .

[0124] When the first arc-isolating member 6 is installed on the static contact lead-out terminal 21, the positioning portion 62 and the positioning matching portion 211 can initially position the first arc-isolating member 6, thereby improving the accuracy of the installation of the first arc-isolating member 6. At the same time, the positioning portion 62 is clamped on the positioning matching portion 211 to fix the first arc-isolating member 6 and prevent the first arc-isolating member 6 from falling off.

[0125] The positioning portion 62 and the positioning matching portion 211 can be stop steps or annular positioning grooves or positioning protrusions provided on the static contact lead-out terminal 21. For example, the positioning portion 62 is an annular clamping block provided on the inner wall of the first arc-isolating member 6, and the positioning matching portion 211 is an annular clamping groove provided on the outer wall of the static contact lead-out terminal 21, and the annular clamping block is clamped in the annular clamping groove. The positioning portion 62 and the positioning matching portion 211 provided in this embodiment are not limited to other forms, as long as the positioning and fixing of the first arc-isolating member 6 relative to the static contact lead-out terminal 21 can be achieved, they are within the protection scope of this embodiment.

[0126] In one embodiment, Figure 7As shown, a first guide slot 63 is provided between the top inner wall of the first arc-isolating member 6 away from the end of the movable spring piece 22 and the outer wall of the corresponding static contact lead-out terminal 21 , and the first guide slot 63 is used for guiding the static contact lead-out terminal 21 .

[0127] Because when the first arc-isolating member 6 is installed on the static contact lead-out terminal 21, it is necessary to put the first arc-isolating member 6 on the outer wall of the static contact lead-out terminal 21 from the bottom of the static contact lead-out terminal 21, for this purpose, the top inner wall of the first arc-isolating member 6 and the outer wall of the static contact lead-out terminal 21 are not in contact with each other, and a first guide gap 63 is provided between the top inner wall of the first arc-isolating member 6 and the outer wall of the static contact lead-out terminal 21. The first guide gap 63 is utilized to provide a guiding function for the first arc-isolating member 6, so as to facilitate the installation of the first arc-isolating member 6.

[0128] It can be understood that the first guide gap 63 can be a trumpet-shaped structure, and the large end of the first gap 60 is set away from the moving reed 22. The large end of the first gap 60 provides an entrance for the bottom of the static contact lead-out terminal 21 to pass through, further improving the convenience of installation of the first arc-isolating member 6.

[0129] In one embodiment, Figure 8 As shown, the second arc isolation member 7 is made of insulating material.

[0130] Specifically, the second arc isolation member 7 can be made of insulating materials such as ceramics, glass, rubber or plastic. The second arc isolation member 7 made of insulating material has good arc breaking or arc cooling performance, strong arc extinguishing ability and good arc extinguishing effect.

[0131] It can be understood that in some other embodiments, the second arc isolation member 7 can also be made of metal material.

[0132] In one embodiment, the second arc isolation member 7 is sleeved on the outer wall of the movable spring piece 22 .

[0133] The second arc-isolating member 7 can also be called an arc-isolating sleeve. The second arc-isolating member 7 is sleeved on the outer wall of the moving spring piece 22 to perform arc-isolating treatment on the outer peripheral side of the contact area corresponding to the moving contact of the moving spring piece 22, which can isolate the arc more comprehensively and is conducive to arc extinguishing.

[0134] It can be understood that the number of the second arc-isolating members 7 is two, and the two second arc-isolating members 7 are respectively arranged at two ends of the movable spring piece 22 along the length direction of the movable spring piece 22 .

[0135] In this way, the two groups of moving and static contacts between the moving spring piece 22 and the static contact lead-out terminal 21 correspond to the two second arc-isolating members 7 respectively, so that each group of moving and static contacts can be arc-isolated by a corresponding second arc-isolating member 7, and double arc extinguishing can be achieved, thereby improving the thoroughness of arc extinguishing.

[0136] In one embodiment, Figure 8-Figure 14 As shown, a second step 71 is provided between the second arc isolation member 7 and the movable reed 22 to hinder arc transfer; and / or a second gap 72 is provided between the second arc isolation member 7 and the movable reed 22 to hinder transfer.

[0137] A second step 71 and / or a second gap 72 are provided at the contact position between the second arc-isolating member 7 and the moving spring piece 22 and on the path of the arc movement, that is, a bend is formed on the arc path, which can consume the kinetic energy of the arc and better block the transfer of the arc. The arc transfer direction has two directions: first, the second step 71 and / or the second gap 72 can block the arc from transferring in the direction of a pair of static contact lead-out terminals 21 approaching each other, avoiding the situation where the two sets of moving and static contacts between the moving spring piece 22 and the pair of static contact lead-out terminals 21 produce an arc short circuit; second, the second step 71 and / or the second gap 72 can block the arc from transferring downward along the moving spring piece 22 away from the static contact lead-out terminals 21, further reducing the arc ablation of the outer wall of the moving spring piece 22, improving the arc extinguishing ability and effect, and thus improving the load breaking ability between the moving contact and the static contact corresponding to the moving spring piece 22 and the static contact lead-out terminals 21.

[0138] In one embodiment, the portion where the movable spring piece 22 and the pair of static contact lead-out terminals 21 contact each other is the first contact portion 220 , and the second step 71 and / or the second gap 72 are disposed between the inner edges of the first contact portion 220 .

[0139] Specifically, the first contact portion 220 is specifically two groups of moving and static contacts. Since an arc is generated at the contact portion between the moving spring piece 22 and a pair of the static contact lead ends 21, the second step 71 and / or the second gap 72 are arranged between the inner edges of the first contact portion 220. The second step 71 and / or the second gap 72 can cut off the path of the arc transferring to the side, thereby avoiding the situation where the two groups of moving and static contacts generate an arc short circuit.

[0140] In one embodiment, Figure 8-Figure 14 As shown, the second arc-isolating member 7 includes a column 70, the top surface of the column 70 facing the static contact lead-out terminal 21 protrudes from the top surface of the moving spring piece 22 facing the static contact lead-out terminal 21, so that a second step 71 is formed between the top surface of the column 70 and the top surface of the moving spring piece 22.

[0141] Since the top surface of the column 70 in the second arc-isolating member 7 protrudes from the top surface of the moving spring piece 22, the top of the column 70 and the top surface of the moving spring piece 22 are not coplanar, or the column 70 is not embedded in the top surface of the moving spring piece 22, and a second step 71 is formed between the top of the column 70 and the top surface of the moving spring piece 22. The second step 71 is closer to the arc starting point, thereby isolating and cutting off the transfer path of the arc on the top surface of the moving spring piece 22, and preventing the arc from transferring to the center line of the length direction of the moving spring piece 22, avoiding the arc short circuit generated by the two sets of moving and static contacts between the moving spring piece 22 and a pair of static contact lead-out terminals 21, so that the arc can be efficiently extinguished on the originally set arc extinguishing path of the magnetic blowing magnetic field, thereby improving the arc extinguishing ability.

[0142] In one embodiment, a mounting groove 223 is disposed on the side wall of the movable spring piece 22 , the column 70 is at least partially disposed in the mounting groove 223 , and the second gap 72 is disposed between the column 70 and the mounting groove 223 .

[0143] A mounting groove 223 is provided on the side wall of the movable spring piece 22. The mounting groove 223 not only provides a holding space for the column 70, but also serves to install the column 70. The outer wall of the column 70 and the inner wall of the mounting groove 223 are not in contact with each other. A second gap 72 is provided between the outer wall of the column 70 and the inner wall of the mounting groove 223. Due to the existence of the second gap 72, a part of the arc can enter the second gap 72. The second gap 72 provides a holding space for the arc and reduces the risk of this part of the arc transferring along the movable spring piece 22 in a direction away from the static contact lead-out terminal 21, thereby improving the arc extinguishing effect.

[0144] In one embodiment, an end of the second gap 72 facing the static contact lead-out terminal 21 is provided with an open end, and an end of the second gap 72 facing away from the static contact lead-out terminal 21 is a closed end.

[0145] The open end of the second gap 72 is used to introduce the arc, and the second gap 72 has a closed end so that the second gap 72 does not completely penetrate the structure, thereby forming a bend in the arc path.

[0146] In one embodiment, Figure 8 and Fig.14 As shown, the mounting groove 223 includes a first mounting portion 2231, the first mounting portion 2231 is arranged on the side of the movable spring piece 22 facing the static contact lead-out end 21, the column 70 is passed through the first mounting portion 2231, and the second gap 72 is arranged between the column 70 and the first mounting portion 2231. The second gap 72 is arranged along the axial direction of the column 70.

[0147] A first mounting portion 2231 is provided on the side wall of the movable spring piece 22 and facing the side of the static contact lead-out terminal 21, that is, the first mounting portion 2231 is located at the upper part of the side wall of the movable spring piece 22, and a second gap 72 is provided between the first mounting portion 2231 and the column 70. Since the second gap 72 is closer to the position where the movable spring piece 22 and the static contact lead-out terminal 21 contact each other, a part of the arc can directly enter the second gap 72.

[0148] In addition, the connection between the top surface and the side surface of the column 70 is an edge, and the arc moves to the edge to form a concentrated arc. At the same time, due to the existence of the second gap 72, a part of the arc can enter the second gap 72 to form a height difference in the arc transfer path. This height difference makes it difficult for the arc to move away from the static contact lead-out terminal 21. The combination of the edge and the height difference is used to improve the arc extinguishing effect.

[0149] In one embodiment, the second gap 72 is a trumpet-shaped structure, and the wide end of the second gap 72 is arranged toward the static contact lead-out terminal 21 .

[0150] In one embodiment, Figure 8 and Fig.14 As shown, the mounting groove 223 further includes a fixing portion 2232 , the fixing portion 2232 is communicated with the first mounting portion 2231 , and the column 70 is clamped on the fixing portion 2232 for fixing the second arc isolation member 7 .

[0151] Specifically, the column 70 is clamped on the fixing portion 2232, that is, the outer wall of the column 70 and the inner wall of the fixing portion 2232 are in contact or interference fit, and the fixing portion 2232 clamps and fixes the column 70 to prevent the second arc isolation member 7 from detaching from the movable spring leaf 22.

[0152] In one embodiment, Figure 8 and Fig.14 As shown, the mounting groove 223 also includes a second mounting portion 2233, which is arranged on a side of the moving spring piece 22 away from the static contact lead-out end 21, and the second mounting portion 2233 is connected to the first mounting portion 2231 through the fixing portion 2232. The column 70 is passed through the second mounting portion 2233 and a second guide gap 73 is arranged between the outer wall of the column 70 and the inner wall of the second mounting portion 2233, and the second guide gap 73 is used for guiding the column 70.

[0153] The second mounting portion 2233 is arranged on the side of the moving spring piece 22 away from the static contact lead-out terminal 21, that is, the second mounting portion 2233 is located at the lower part of the side wall of the moving spring piece 22, and a second guide gap 73 is arranged between the first mounting portion 2231 and the column 70, and the second guide gap 73 is used to guide the column 70. Since the column 70 needs to be inserted from the bottom of the moving spring piece 22 into the mounting groove 223 of the moving spring piece 22 when the second arc-isolating member 7 is installed on the moving spring piece 22, for this purpose, a second guide gap 73 is arranged between the outer wall of the column 70 and the inner wall of the second mounting portion 2233, that is, the outer wall of the column 70 and the inner wall of the second mounting portion 2233 are not in contact with each other, and the second guide gap 73 is used to provide a guiding effect for the column 70, so as to facilitate the installation of the column 70 of the second arc-isolating member 7.

[0154] It can be understood that the second guide gap 73 can be a trumpet-shaped structure, and the large end of the second guide gap 73 is set away from the static contact lead-out terminal 21. The large end of the second gap 72 provides an entrance for the column 70 to pass through, further improving the convenience of installing the second arc isolation member 7.

[0155] In one embodiment, there are two columns 70 , two mounting grooves 223 are disposed on both sides of the movable spring piece 22 along the width direction of the movable spring piece 22 and between the inner edges of the first contact portion 220 , and the two columns 70 are disposed correspondingly to the two mounting grooves 223 .

[0156] Specifically, the two columns 70 are correspondingly arranged along the width direction of the movable spring piece 22. The two columns 70 can completely cut off the transfer path of the arc toward the pair of static contact lead-out terminals 21 approaching each other, and the arc isolation effect is good.

[0157] In one embodiment, Figure 8-Figure 14 As shown, the second arc isolation member 7 further includes a limiting portion 74 , which is disposed on a side of the column 70 away from the movable spring piece 22 and can abut against the movable spring piece 22 for limiting the position of the column 70 .

[0158] When the second arc isolation member 7 is installed on the movable spring piece 22 , the limiting portion 74 can abut against the movable spring piece 22 to initially position and limit the column 70 of the second arc isolation member 7 , thereby improving the accuracy of the installation of the second arc isolation member 7 .

[0159] In one embodiment, the second arc-isolating member 7 further includes an arc-isolating ring 75 , which wraps around at least a portion of the side wall of the end portion of the movable reed 22 along the length direction of the movable reed 22 .

[0160] The arc-isolating ring 75 of the second arc-isolating member 7 is wrapped around the end of the moving spring piece 22 and at least part of the side wall of the moving spring piece 22, which is equivalent to installing an arc-isolating sleeve on the outer peripheral side of the contact area between the static contact lead-out end 21 and the moving spring piece 22, reducing the arc ablation of the outer wall of the moving spring piece 22, and preventing the arc from transferring downward along the side wall of the moving spring piece 22, which is conducive to arc extinguishing. In addition, the arc-isolating ring 75 is a hollow structure, that is, a center hole is provided in the center of the arc-isolating ring 75, and the arc-isolating ring 75 plays a role in reducing weight, meeting the demand for lightweight.

[0161] In one embodiment, Figure 8-Figure 14 As shown, the second arc-isolating member 7 further includes a connecting portion 76 , which is disposed at the bottom of the movable spring piece 22 away from the static contact lead-out terminal 21 and is respectively connected to the two ends of the arc-isolating ring 75 , and the column 70 is disposed at the connecting portion 76 .

[0162] If the arc isolation ring 75 has an open end, the arc isolation ring 75 is an open structure, and the connecting parts 76 are respectively connected to the two ends of the arc isolation ring 75, so that the second arc isolation member 7 is an integral structure, and the fixing effect between the second arc isolation member 7 and the movable spring piece 22 is improved. At the same time, the connecting part 76 is located at the bottom of the movable spring piece 22, and will not interfere with the mutual contact between the movable spring piece 22 and the static contact lead-out terminal 21.

[0163] It should be noted that the relay contact assembly 2 provided in this embodiment can have a second arc-isolating member 7, a second step 71 and a second gap 72 at the same time. The second step 71 and the second gap 72 form a partial arc-isolating structure for limiting the partial arc or the arc from being transferred along the moving spring piece 22 in a direction away from the static contact lead-out terminal 21 and limiting the partial arc from being transferred along the moving spring piece 22 in a direction where a pair of static contact lead-out terminals 21 are close to each other. The second arc-isolating member 7 made of insulating material has the performance of breaking the arc or cooling the arc to achieve the effect of extinguishing the arc.

[0164] It can be understood that the relay contact assembly 2 provided in this embodiment can utilize the first arc-isolating member 6 to prevent the arc from transferring upward along the outer wall of the static contact lead-out terminal 21, and can utilize the second arc-isolating member 7 to prevent the arc from transferring downward along the outer wall of the movable spring piece 22. At the same time, under the joint action of the first arc-isolating member 6 and the second arc-isolating member 7, the arc is prevented from transferring in the direction in which a pair of static contact lead-out terminals 21 approach each other, so as to limit the transfer range of the arc to between the movable spring piece 22 and the static contact lead-out terminal 21, thereby isolating the arc more comprehensively, preventing the transfer of the arc, and improving the arc extinguishing performance.

[0165] This embodiment also provides a relay, comprising the above-mentioned relay contact assembly 2.

[0166] In the relay provided in this embodiment, the movable spring piece 22 of the relay contact assembly 2 contacts or separates with a pair of static contact lead-out terminals 21. When the movable spring piece 22 contacts the static contacts at the bottom of the pair of static contact lead-out terminals 21, the current flows into one static contact lead-out terminal 21, passes through the movable spring piece 22, and then flows out from the other static contact lead-out terminal 21, thereby connecting the load. The first arc-isolating member 6 can be used to prevent the arc from transferring upward along the outer wall of the static contact lead-out terminal 21, and the second arc-isolating member 7 can be used to prevent the arc from transferring downward along the outer wall of the movable spring piece 22. Under the joint action of the first arc-isolating member 6 and the second arc-isolating member 7, the transfer range of the arc is limited to between the movable spring piece 22 and the static contact lead-out terminal 21, which can more comprehensively isolate the arc, prevent the transfer of the arc, and improve the thoroughness of arc extinguishing.

[0167] In one embodiment, Figure 3 and Fig.15 As shown, the relay provided in this embodiment also includes a contact container 1, which includes an insulating cover 11, a movable spring 22 is arranged in the insulating cover 11, and a static contact lead-out terminal 21 is passed through the insulating cover 11 and is at least partially arranged in the insulating cover 11.

[0168] The insulating cover 11 and the yoke iron plate are connected by a frame sheet 12, and the insulating cover 11 and the yoke iron plate enclose a contact chamber. The contact chamber provides an arc-isolating environment for the contact between the moving spring piece 22 and the static contact lead-out terminal 21, ensuring the reliability of the relay during use.

[0169] In one embodiment, the first arc-isolating member 6 is disposed outside the portion of the static contact lead-out terminal 21 located inside the insulating cover 11. The first arc-isolating member 6 isolates and protects the portion of the static contact lead-out terminal 21 located inside the insulating cover 11.

[0170] In one embodiment, Fig.16 and Fig.17 As shown, the side of the movable spring piece 22 provided in this embodiment facing the static contact lead-out terminal 21 is the top surface of the movable spring piece 22, and the top surface of the movable spring piece 22 is provided with an arc-isolating portion, which is used to prevent the arc from moving toward the direction in which a pair of static contact lead-out terminals 21 approach each other.

[0171] The arc isolation portion is arranged on the top surface of the moving reed piece 22 to prevent the arc from transferring along the top surface of the moving reed piece 22, thereby isolating and cutting off the transfer path of the arc on the top surface of the moving reed piece 22, and preventing the arc from transferring to the center line of the length direction of the moving reed piece 22, thereby avoiding the arc short circuit generated by the two groups of moving and static contacts between the moving reed piece 22 and a pair of static contact lead-out terminals 21, so that the arc can be efficiently extinguished on the originally set arc extinguishing path of the magnetic blowing magnetic field, thereby improving the arc extinguishing ability.

[0172] In one embodiment, the arc isolation portion is disposed between inner edges of the two first contact portions 220 .

[0173] Among them, the part where the movable spring piece 22 and the pair of static contact lead-out terminals 21 contact each other is the first contact portion 220, and the arc isolation portion is arranged between the inner edges of the first contact portion 220 to cut off the path of the arc transferring to the inner side of the static contact lead-out terminals 21, avoiding the arc short circuit generated by the two groups of movable and static contacts between the movable spring piece 22 and the pair of static contact lead-out terminals 21, so as to ensure the high efficiency and thoroughness of arc extinguishing.

[0174] It should be noted that the inner side specifically refers to the side where a pair of static contact lead-out terminals 21 are close to each other (such as Figure 2 Q is the direction in which the lead-out terminals 21 of a pair of static contacts are close to each other), or one side close to the center line of the length direction of the moving spring piece 22 (such as Fig.16 L is the length direction of the moving spring piece 22, and T is the width direction of the moving spring piece 22). Therefore, the arc-isolating portion is arranged on the side of the first contact portion 220 facing inward, or the arc-isolating portion is arranged between the center lines of the two static contact lead-out terminals 21 (such as Figure 2 M is shown as the center line of the static contact lead-out terminal 21).

[0175] It can be understood that at least a portion of the first step 61 and / or the first gap 60 is disposed between the inner edges of the first contact portion 220 .

[0176] In one embodiment, Figure 16-Figure 17 As shown, the arc-isolating portion is a first arc-isolating groove 222 ; and / or, the arc-isolating portion is an arc-isolating rib 225 .

[0177] When the arc-isolating portion is the first arc-isolating groove 222, that is, a concave structure is provided on the top surface of the moving spring piece 22; when the arc-isolating portion is the arc-isolating rib 225, that is, a convex structure is provided on the top surface of the moving spring piece 22, these two structures can solve the problem of rapid arc transfer on the top surface of the planar structure moving spring piece 22. The first arc-isolating groove 222 and / or the arc-isolating rib 225 can be used to isolate and cut off the transfer path of the arc on the top surface of the moving spring piece 22, and prevent the arc from transferring to the center line of the length direction of the moving spring piece 22, thereby avoiding arc short circuits generated by two sets of moving and static contacts between the moving spring piece 22 and a pair of static contact lead-out terminals 21.

[0178] Specifically, the first arc isolation groove 222 includes a first groove wall and a first groove bottom connected to each other. The arc moves to the connection between the first groove wall and the top surface of the movable spring piece 22 to form a concentrated arc, and the height difference between the top surface of the movable spring piece 22 facing the static contact lead-out terminal 21 and the first groove bottom is used to prevent the arc from moving toward the direction in which the pair of static contact lead-out terminals 21 approach each other.

[0179] Since the first arc isolation groove 222 has a first groove wall and a first groove bottom that are connected to each other, the connection between the first groove wall and the top surface of the movable spring piece 22 is an edge, and the arc moves to the edge to form a concentrated arc. At the same time, the height difference between the top surface of the movable spring piece 22 and the first groove bottom forms a drop on the arc transfer path. This drop makes it difficult for the arc to move toward the center line of the length direction of the movable spring piece 22. The combination of the edge and the drop is used to improve the arc extinguishing effect.

[0180] In one embodiment, Fig.16 As shown, the first arc isolation groove 222 is a through groove along the width direction of the movable spring piece 22 .

[0181] If the first arc isolating groove 222 extends along the length direction of the moving spring piece 22, the arc may transfer along the portion of the top surface of the moving spring piece 22 where the first arc isolating groove 222 is not provided, which may cause the risk of arc short circuit. To this end, the first arc isolating groove 222 is provided as a through groove along the width direction of the moving spring piece 22. Since the through groove is provided in the width direction of the moving spring piece 22, after the arc enters the first arc isolating groove 222, the transfer path of the arc toward the direction of the pair of static contact lead-out terminals 21 approaching each other is completely cut off.

[0182] In one embodiment, Figure 16-Figure 17 As shown, there are two arc-isolating portions, which are arranged corresponding to a pair of static contact lead-out terminals 21 , and the arc-isolating portions are arranged on one side of the pair of static contact lead-out terminals 21 that are close to each other.

[0183] Specifically, since there are two static contact lead-out terminals 21, two first arc-isolating grooves 222 are arranged corresponding to the two static contact lead-out terminals 21 and are arranged on the inner side of the static contact lead-out terminals 21, so that the arc generated by the separation of the two groups of moving and static contacts is isolated by the two first arc-isolating grooves 222 respectively, which plays a double arc-isolating role and further improves the arc-isolating effect.

[0184] In one embodiment, the first arc isolation groove 222 is an arc-shaped structure, and the first arc isolation groove 222 is arranged around the static contact lead-out terminal 21 .

[0185] Specifically, since the bottom of the static contact lead-out terminal 21 is similar to a cylindrical structure, the shape of the first arc-isolating groove 222 is adapted to the outer shape of the bottom of the static contact lead-out terminal 21. The first arc-isolating groove 222 with an arc-shaped structure is arranged along the outer shape of the static contact lead-out terminal 21 and is arranged around the static contact lead-out terminal 21, thereby obstructing the transfer path of the arc in all directions.

[0186] It can be understood that the first arc-isolating groove 222 of the arc-shaped structure extends from one side of the movable spring piece 22 to the other side in the width direction, and a contact portion is formed at both ends of the movable spring piece 22 along the length direction of the movable spring piece 22 and in the part where the first arc-isolating groove 22 is not provided, and the contact portion is used to contact with the static contact lead-out terminal 21.

[0187] It should be noted that if Figure 16-Figure 17 As shown, the first arc isolation groove 222 can be replaced by an arc isolation rib 225. The arrangement position and shape of the arc isolation rib 225 are similar to those of the first arc isolation groove 222 and will not be described in detail.

[0188] This embodiment also provides a relay, including the above-mentioned relay contact assembly 2.

[0189] In the relay provided in this embodiment, the movable spring 22 of the relay contact assembly 2 contacts or separates with a pair of stationary contact lead-out terminals 21. When the movable spring 22 contacts the stationary contacts at the bottom of the pair of stationary contact lead-out terminals 21, current flows into one stationary contact lead-out terminal 21, passes through the movable spring 22, and then flows out from the other stationary contact lead-out terminal 21, thereby connecting the load.

[0190] In one embodiment, Fig.15 , Figure 18-19 As shown, the relay also includes a push assembly 4, which includes a push rod unit 41, an elastic member 43 and a U-shaped bracket 42. Among them, the push rod unit 41 includes a base 413 and a push rod 411, and the upper parts of the base 413 and the push rod 411 can be integrally injection molded. The U-shaped bracket 42 and the base 413 form a frame structure, and the moving spring 22 and the elastic member 43 are installed in the frame structure formed by the U-shaped bracket 42 and the base 413. One end of the elastic member 43 abuts against the base 413, and the other end abuts against the moving spring 22. The elastic member 43 can provide elastic force, so that the moving spring 22 has a tendency to move away from the base 413 and close to the static contact lead-out terminal 21.

[0191] Specifically, the push rod unit 41 and the U-shaped bracket 42 cooperate with each other through the limiting protrusion 412 and the limiting hole, and the moving force of the push rod unit 41 can be transmitted to the U-shaped bracket 42 to drive the moving spring 22 to move, so that the moving spring 22 can be used to contact or separate with a pair of static contact lead-out terminals 21.

[0192] like Fig.15 , Figure 18-19 As shown, the driving assembly 4 of the relay further includes an electromagnet unit 44, which is arranged on the side of the yoke plate away from the insulating cover 11. The push rod unit 41 is drivingly connected to the electromagnet unit 44, and the push rod unit 41 is movably arranged in the driving chamber surrounded by the metal cover and the yoke plate and passes through the through hole of the yoke plate to abut against the moving spring 22. When the electromagnet unit 44 is energized, it can drive the push rod unit 41 to move, thereby driving the moving spring 22 to move, so as to contact or separate from the static contact lead-out terminal 21.

[0193] The electromagnet unit 44 includes a coil frame 441, a coil 442, a static iron core 444, a moving iron core 443, a U-shaped yoke 445, a magnetic cylinder 446 and a spring 447. The coil frame 441 is arranged in the U-shaped yoke 445, and the coil frame 441 is in a hollow cylindrical shape and is formed of an insulating material. The magnetic cylinder 446 is inserted into the coil frame 441, and the coil 442 surrounds the coil frame 441. The static iron core 444 has a second through hole, and the second through hole is arranged corresponding to the through hole of the yoke plate, so that the push rod unit 41 can be inserted therein. The moving iron core 443 is movably arranged in the magnetic cylinder 446 and is arranged opposite to the static iron core 444. The spring 447 is arranged between the static iron core 444 and the moving iron core 443 and can be respectively abutted therewith. The moving iron core 443 is connected to the push rod unit 41, and is used to be attracted by the static iron core 444 when the coil 442 is energized. The moving iron core 443 and the push rod unit 41 can be connected by screwing, riveting, welding or other methods.

[0194] The working process of the relay provided in this embodiment is as follows:

[0195] When the coil 442 is energized, the static iron core 444 attracts the moving iron core 443, and the moving iron core 443 drives the push rod unit 41 to move upward, and the spring 447 between the static iron core 444 and the moving iron core 443 is compressed. The push rod unit 41 pushes the moving reed 22 to move through the U-shaped bracket 42 and the elastic member 43, so that the two ends of the moving reed 22 are respectively in contact with the two static contact lead-out ends 21 to complete the process of closing the moving and static contacts.

[0196] When the coil 442 disconnects the current, the static iron core 444 releases its attraction to the moving iron core 443. Under the elastic force of the compressed spring 447, the moving iron core 443 drives the push rod unit 41 to move downward, so that the moving contacts at both ends of the moving spring 22 are separated from the two static contact lead-out ends 21, thereby completing the process of separation of the moving and static contacts.

[0197] In one embodiment, Fig.15 , Figure 18-19 As shown, the relay also includes an arc extinguishing unit 5, which is arranged in the hollow chamber of the housing and is used to extinguish the arc of the contact assembly 2. The arc extinguishing unit 5 includes two arc extinguishing magnets 51. The arc extinguishing magnets 51 can be permanent magnets, and each arc extinguishing magnet 51 can be roughly rectangular. The two arc extinguishing magnets 51 are respectively arranged on both sides of the insulating cover 11, and are relatively arranged along the length direction of the moving spring piece 22.

[0198] In this embodiment, the two arc-extinguishing magnets 51 are respectively located on the left and right sides of the insulating cover 11. The polarities of the surfaces facing each other of the two arc-extinguishing magnets 51 are opposite. That is, the arc-extinguishing magnet 51 located on the left side of the insulating cover 11 has an S pole on the left and an N pole on the right, and the arc-extinguishing magnet 51 located on the right side of the insulating cover 11 has an S pole on the left and an N pole on the right.

[0199] Of course, the polarities of the facing surfaces of the two arc extinguishing magnets 51 can also be designed to be the same. For example, the arc extinguishing magnet 51 located on the left side of the insulating cover 11 has an S pole on the left and an N pole on the right, and the arc extinguishing magnet 51 located on the right side of the insulating cover 11 has an N pole on the left and an S pole on the right.

[0200] In this way, by providing two arc-extinguishing magnets 51 disposed opposite to each other, a magnetic field can be formed around the contact assembly 2 .

[0201] Therefore, the arc generated between the static contact lead-out terminal 21 and the movable spring piece 22 will be stretched in the direction away from each other by the action of the magnetic field, thereby achieving arc extinguishing.

[0202] The arc extinguishing unit 5 also includes two yoke iron clamps 52, and the two yoke iron clamps 52 are arranged corresponding to the positions of the two arc extinguishing magnets 51. In addition, the two yoke iron clamps 52 surround the insulating cover 11 and the two arc extinguishing magnets 51. By designing that the yoke iron clamps 52 surround the arc extinguishing magnets 51, it is possible to prevent the magnetic field generated by the arc extinguishing magnets 51 from spreading outward and affecting the arc extinguishing effect. The yoke iron clamps 52 are made of soft magnetic material. Soft magnetic materials may include but are not limited to iron, cobalt, nickel and alloys thereof.

[0203] When the short-circuit load is very large, under the action of the short-circuit current, an electrostatic repulsion force will be generated between the moving spring piece 22 and the static contact lead-out terminal 21, causing the contacts to bounce open, resulting in arcing and violent burning of the contacts, and even possible explosion.

[0204] For this reason, Figure 2-Figure 8 As shown, the relay provided in this embodiment also includes an anti-short circuit component 3, which is arranged on at least one side of the moving reed 22 along the axial direction of the static contact lead-out terminal 21, and generates suction when a large fault current occurs in the moving reed 22, so as to resist the electric repulsion between the moving reed 22 and the static contact lead-out terminal 21.

[0205] Among them, the anti-short-circuit component 3 can also be called a short-circuit ring arranged between a pair of static contact lead-out terminals 21. For the high-voltage DC relay, the first arc-isolating member 6 can prevent the arc from being attracted by the anti-short-circuit component 3 and causing the arc to be attracted in the direction of a pair of static contact lead-out terminals 21 approaching each other, thereby preventing the insulation between the contacts from decreasing or the arc from short-circuiting.

[0206] Among them, the axial direction of the static contact lead-out terminal 21, the length direction of the movable reed 22, and the width direction of the movable reed 22 are perpendicular to each other. The axial direction of the static contact lead-out terminal 21, the length direction of the movable reed 22, and the width direction of the movable reed 22 only represent the spatial direction and have no substantial meaning.

[0207] Specifically, the thrust portion 221 of the moving reed 22 is arranged between the two contact portions, and the anti-short circuit component 3 is arranged on the thrust portion 221 of the moving reed 22. The two sides of the thrust portion 221 are planar structures. The double-sided planes of the thrust portion 221 provide installation convenience and reliability for the anti-short circuit component 3. The anti-short circuit component 3 is used to resist the electric repulsion between the moving reed 22 and the static contact lead-out terminal 21.

[0208] In one embodiment, Figure 2-Figure 8 As shown, the anti-short circuit assembly 3 includes an upper magnetic conductor 31 and a lower magnetic conductor 32. The upper magnetic conductor 31 is arranged on the side of the moving spring 22 close to the static contact lead-out terminal 21. The lower magnetic conductor 32 is at least partially arranged on the side of the moving spring 22 away from the static contact lead-out terminal 21 to form a magnetic circuit between the upper magnetic conductor 31 and the lower magnetic conductor 32. The upper magnetic conductor 31 and the lower magnetic conductor 32 can be made of materials such as iron, cobalt, nickel and alloys thereof.

[0209] The upper magnet 31 is arranged on the side of the thrust portion 221 close to the static contact lead-out end 21, and the lower magnet 32 ​​is arranged on the side of the thrust portion 221 away from the static contact lead-out end 21, that is, the lower magnet 32 ​​is fixed below the thrust portion 221 of the movable spring piece 22, and a magnetic circuit can be formed between the upper magnet 31 and the lower magnet 32, and the lower magnet 32 ​​can move together with the movable spring piece 22 toward the direction close to the static contact lead-out end 21. When a large fault current occurs in the movable spring piece 22, since the upper magnetic conductor 31 is located above the movable spring piece 22 and the lower magnetic conductor 32 is located below the movable spring piece 22, it is equivalent to that the movable spring piece 22 is sandwiched between the upper magnetic conductor 31 and the lower magnetic conductor 32. When the upper magnetic conductor 31 generates suction force on the lower magnetic conductor 32, the suction force attracts and pulls the movable spring piece 22, and is used to resist the electromotive repulsion generated by the fault current between the movable spring piece 22 and the static contact lead-out terminal 21, thereby avoiding the situation where the movable spring piece 22 and the static contact lead-out terminal 21 are separated from each other and cause arcing explosion, thereby ensuring the reliability and safety of the contact between the movable spring piece 22 and the static contact lead-out terminal 21.

[0210] In one embodiment, the upper magnet 31 may be a straight-line structure, and the upper magnet 31 is correspondingly arranged between the two contact portions of the movable spring piece 22, and the upper magnet 31 may extend along the width direction of the movable spring piece 22, for matching and corresponding the upper magnet 31 and the lower magnet 32. The lower magnet 32 ​​is a U-shaped structure, and the opening of the lower magnet 32 ​​is arranged toward the movable spring piece 22, so that the two side arms of the lower magnet 32 ​​extend toward the direction of the upper magnet 31, so that the two side arms of the lower magnet 32 ​​can be close to or contact the two ends of the upper magnet 31, respectively, to form a surrounding magnetic conductive ring on the movable spring piece 22 along its width. Since the contact parts at both ends of the moving reed 22 along its length direction are moving contacts, the surrounding magnetic conductive ring formed along the width direction of the moving reed 22 will not interfere. When a large fault current occurs in the moving reed 22, an electromagnetic attraction force is generated in the pressure direction of the moving contact to resist the electric repulsion force generated by the fault current between the moving reed 22 and the static contact lead-out terminal 21.

[0211] The thrust portion 221 of the movable spring piece 22 provided in this embodiment is provided with a through hole 2211 , and the lower magnetic conductor 32 is at least partially disposed through the through hole 2211 .

[0212] In this way, the thrust portion 221 of the movable spring 22 provides a mounting and fixing position for the lower magnet 32, so as to improve the fixing effect between the movable spring 22 and the lower magnet 32. Since the lower magnet 32 ​​is similar to a U-shaped structure, the opening of the lower magnet 32 ​​is arranged toward the thrust portion 221 of the movable spring 22, one side arm of the lower magnet 32 ​​is wrapped around the long side of the movable spring 22, and the other side arm is passed through the through hole 2211.

[0213] In one embodiment, there are multiple upper magnetic conductors 31 and multiple lower magnetic conductors 32 , and the multiple upper magnetic conductors 31 and multiple lower magnetic conductors 32 are correspondingly arranged, and the sides of two adjacent lower magnetic conductors 32 close to each other are penetrated by the through hole 2211 .

[0214] Multiple upper magnetic conductors 31 and multiple lower magnetic conductors 32 are correspondingly arranged to increase the magnetic attraction effect between the upper magnetic conductors 31 and the lower magnetic conductors 32, and further enhance the effect of attracting and pulling the movable spring 22 to resist the electromotive repulsion generated by the fault current between the movable spring 22 and the static contact lead-out terminal 21.

[0215] For example, there are two upper magnetic conductors 31 and two lower magnetic conductors 32, and the side walls of the two lower magnetic conductors 32 close to each other are simultaneously penetrated by the through hole 2211, and the two lower magnetic conductors 32 are installed using the same through hole 2211, reducing production costs and assembly difficulty.

[0216] It should be particularly noted that the U-shaped bracket 42 can be fixedly connected to the upper magnetic conductor 31, the lower magnetic conductor 32 is connected to the bottom of the movable spring 22, the movable spring 22 and the lower magnetic conductor 32 form a movable component, and the anti-short circuit component 3 and the movable spring 22 are arranged between the U-shaped bracket 42 and the push rod unit 41.

[0217] Embodiment 2

[0218] This embodiment is similar to the first embodiment, and the only difference is that the structure of the first arc isolation groove 222 is different.

[0219] like Figure 20-Figure 22 As shown, the first arc isolation groove 222 provided in this embodiment is at least one of a linear structure, a convex structure and an X-shaped structure.

[0220] Specifically, Fig. 20 As shown, the first arc isolation groove 222 is a linear structure, so that the first arc isolation groove 222 is a groove structure with a simple structure and convenient production and processing. Moreover, since the groove width of the first arc isolation groove 222 along the length direction of the movable spring piece 22 is relatively narrow, the overall structural strength of the movable spring piece 22 is relatively large.

[0221] like Fig.21 As shown, the first arc isolation groove 222 is a convex structure, so that the first arc isolation groove 222 is a folded line groove structure, which increases the tortuosity of the arc transfer path, thereby improving the arc extinguishing effect.

[0222] like Fig. 22 As shown, the first arc isolation groove 222 is an X-shaped structure, which includes two cross-arranged wire grooves, so that the arc on one side can be isolated from the transmission path through the two wire grooves, playing a double arc isolation role, and having good isolation and arc extinguishing effects.

[0223] It can be understood that the shapes of the two first arc isolation grooves 222 of this embodiment may be the same or different. For example, one of the first arc isolation grooves 222 is a convex structure, and the other first arc isolation groove 222 is a linear structure.

[0224] It can be understood that the first arc isolation groove 222 provided in this embodiment includes but is not limited to a linear structure and an X-shaped structure, and can also be an S-shaped structure, a conical structure, etc., and its specific shape can be adjusted according to actual production conditions.

[0225] It should be noted that if Figure 23-Figure 25 As shown, the first arc isolation groove 222 can be replaced by an arc isolation rib 225. The arrangement position and shape of the arc isolation rib 225 are similar to those of the first arc isolation groove 222 and will not be described in detail.

[0226] Embodiment 3

[0227] This embodiment is similar to the first embodiment, and the only difference is the number and structure of the arc isolation structures.

[0228] like Figure 26-Figure 27 As shown, the number of arc-isolating portions provided in this embodiment is one, and the portion of the movable spring piece 22 not provided with the arc-isolating portion and the portions on both sides along the length direction of the movable spring piece 22 respectively abut against a pair of static contact lead-out terminals 21 .

[0229] Specifically, since a first arc isolation groove 222 is arranged between a pair of static contact lead-out terminals 21, and the groove width of the first arc isolation groove 222 along the length direction of the movable spring piece 22 is relatively wide, the portion of the movable spring piece 22 that is not provided with the first arc isolation groove 222 and the portions provided at both ends of the movable spring piece 22 along the length direction of the movable spring piece 22 are respectively two contact portions, and the two contact portions correspond to a pair of static contact lead-out terminals 21. The arc isolation process of two groups of movable and static contacts can be realized by utilizing a first arc isolation groove 222, the structure is simple, and the production cost is relatively low.

[0230] In one embodiment, Figure 26-Figure 27 As shown, the distance between the two side edges of the first arc isolation groove 222 along the length direction of the movable spring piece 22 is less than or equal to the distance between the bottoms of a pair of static contact lead-out terminals 21 .

[0231] Specifically, the groove width of the first arc isolation groove 222 along the length direction of the movable spring piece 22 extends to the vicinity of the inner edge of the bottom of the static contact lead-out end 21 or is flush with the inner edge of the bottom of the static contact lead-out end 21, so that the edge between the first groove wall of the first arc isolation groove 222 and the top surface of the movable spring piece 22 is as close to the bottom of the static contact lead-out end 21 as possible, the arc can be gathered at the edge as soon as possible, and the height difference between the top surface of the movable spring piece 22 and the first groove bottom of the first arc isolation groove 222 is utilized to reduce the risk of the arc transferring toward the center line direction of the movable spring piece 22.

[0232] It should be noted that if Figure 26-Figure 27 As shown, the first arc isolation groove 222 can be replaced by an arc isolation rib 225. The arrangement position and shape of the arc isolation rib 225 are similar to those of the first arc isolation groove 222 and will not be described in detail.

[0233] Embodiment 4

[0234] This embodiment is similar to the first embodiment and the second embodiment, except that other detailed structures of the movable spring piece 22 are added on the basis of the first embodiment or the second embodiment.

[0235] The movable spring piece 22 provided in this embodiment may further be provided with a second arc isolation groove on the side wall of the movable spring piece 22 , and the second arc isolation groove is used to prevent the arc from moving toward the direction in which the pair of static contact lead-out terminals 21 approach each other.

[0236] The movable spring piece 22 provided in this embodiment has a second arc isolation groove set on the side wall of the movable spring piece 22, which prevents the arc from transferring along the side wall of the movable spring piece 22 to the center line of the movable spring piece 22 in the length direction, thereby isolating and cutting off the transfer path of the arc on the side wall of the movable spring piece 22, avoiding the arc short circuit generated by the two groups of movable and static contacts between the movable spring piece 22 and a pair of static contact lead-out terminals 21, so that the arc can be efficiently extinguished on the originally set arc extinguishing path of the magnetic blowing magnetic field, thereby improving the arc extinguishing ability.

[0237] In one embodiment, the second arc isolation groove is disposed between the center lines of a pair of static contact lead-out terminals 21 .

[0238] In other words, the second arc-isolating groove is arranged on the inner side of the static contact lead-out terminal 21 to cut off the path of the arc transferring toward the inner side of the static contact lead-out terminal 21, avoiding the arc short circuit generated by the two groups of moving and static contacts between the moving spring piece 22 and a pair of static contact lead-out terminals 21, so as to ensure the high efficiency and thoroughness of arc extinguishing.

[0239] In one embodiment, there are multiple second arc isolation grooves, and multiple second arc isolation grooves are arranged on both sides of the movable reed piece 22 along the length direction of the movable reed piece 22; and / or, there are multiple second arc isolation grooves, and multiple second arc isolation grooves are arranged on both sides of the movable reed piece 22 along the width direction of the movable reed piece 22.

[0240] Specifically, there are four second arc isolation grooves, two of which are provided on each side of the movable spring piece 22 along its length direction, and two of which are provided on each side of the movable spring piece 22 along its width direction. The four second arc isolation grooves are arranged at the four corners of the thrust portion 221 of the movable spring piece 22, so that the arc can be isolated by the second arc isolation grooves no matter how it transfers along the side wall of the movable spring piece 22, thereby further improving the arc isolation effect.

[0241] In one embodiment, the second arc isolation groove includes a second groove wall and a second groove bottom that are connected to each other; wherein, the arc moves to the connection between the second groove wall and the side wall of the movable spring piece 22 to form a concentrated arc, and the height difference between the side wall of the movable spring piece 22 and the second groove bottom is used to hinder the arc from moving toward a pair of static contact lead-out terminals 21 approaching each other.

[0242] Since the second arc isolating groove has a second groove wall and a second groove bottom that are connected to each other, the connection between the second groove wall and the side wall of the movable spring piece 22 is an edge, and the arc moves to the edge to form a concentrated arc. At the same time, the height difference between the side wall of the movable spring piece 22 and the second groove bottom is the drop in the transfer path of the arc along the side wall of the movable spring piece 22. The drop makes it difficult for the arc to move toward the center line of the length direction of the movable spring piece 22. The combination of the edge and the drop is used to improve the arc extinguishing effect.

[0243] In one embodiment, the second arc isolation groove is a through groove along the axial direction of the static contact lead-out end 21 .

[0244] If the second arc isolating groove extends along the length direction of the moving spring piece 22, the arc may transfer along the part of the side wall of the moving spring piece 22 where the second arc isolating groove is not provided, and there is a risk of arc short circuit. For this reason, the second arc isolating groove is provided as a through groove along the axial direction of the static contact lead-out end 21. Since the through groove is provided in the height direction of the moving spring piece 22, after the arc enters the second arc isolating groove, the transfer path of the arc toward the direction of the pair of static contact lead-out ends 21 approaching each other is completely cut off.

[0245] It should be noted that the movable spring shown in the drawings and described in this specification is only an example of the principle of the present invention. It should be clearly understood by those skilled in the art that the principle of the present invention is not limited to any details or any components of the device shown in the drawings or described in the specification.

[0246] It should be understood that the present invention is not limited in its application to the detailed structure and arrangement of the components proposed in this specification. The present invention can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned variations and modifications fall within the scope of the present invention. It should be understood that the present invention disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All these different combinations constitute multiple alternative aspects of the present invention. The embodiments described in this specification illustrate the best mode known for implementing the present invention and will enable those skilled in the art to utilize the present invention.

[0247] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and example embodiments are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the appended claims.

[0248] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of protection of the present invention is limited only by the appended claims.

Claims

1. A relay contact assembly, characterized in that: include: A pair of static contact terminals; A moving reed, used to contact or separate with a pair of static contact lead-out terminals; A first arc-isolating member, arranged outside the static contact lead-out end, for preventing arc transfer; The second arc-isolating member is installed on the movable spring piece and is used for preventing the arc from transferring.

2. The relay contact assembly according to claim 1, characterized in that: The first arc-isolating member is sleeved on the outside of the static contact lead-out end; and / or, The second arc isolation member is sleeved on the outer wall of the movable spring piece.

3. The relay contact assembly according to claim 1, characterized in that: A first step and / or a first gap is provided between the first arc-isolating member and the static contact lead-out end to prevent arc transfer.

4. The relay contact assembly according to claim 3, characterized in that: The first arc-isolating member protrudes from the outer peripheral wall of the static contact lead-out end, and the first step is formed between the bottom wall of the first arc-isolating member facing one end of the movable spring piece and the outer peripheral wall of the static contact lead-out end corresponding thereto.

5. The relay contact assembly according to claim 3, characterized in that: The first gap is arranged between the bottom inner wall of the first arc-isolating member facing one end of the movable spring piece and the outer peripheral wall of the static contact lead-out end.

6. The relay contact assembly according to claim 3, characterized in that: One of the inner wall of the first arc-isolating member and the outer wall of the static contact lead-out end is provided with a limiting portion, and the other is provided with a positioning matching portion, and the limiting portion is clamped in the positioning matching portion.

7. The relay contact assembly according to claim 3, characterized in that: A static contact is provided at the bottom of the static contact lead-out end, and the outer peripheral wall of the first arc-isolating member protrudes from the outer peripheral wall of the static contact; Wherein, the static contact lead-out terminal and the static contact are an integrally formed structure or a split structure.

8. The relay contact assembly according to claim 3, characterized in that: The first gap is provided with an open end toward an end away from the movable spring piece, and the end of the first gap away from the movable spring piece is a closed end.

9. The relay contact assembly according to claim 3, characterized in that: The first gap is arranged between the inner peripheral wall of the bottom of the first arc isolation member and the outer peripheral wall of the bottom of the static contact lead-out terminal.

10. The relay contact assembly according to claim 3, characterized in that: The portion where the movable spring piece contacts the pair of static contact lead-out terminals is a first contact portion, and at least part of the first step and / or the first gap is arranged between inner edges of the first contact portion.

11. The relay contact assembly according to claim 1, characterized in that: A second step is provided between the second arc-isolating member and the movable spring piece to prevent arc transfer; and / or, A second gap is provided between the second arc-isolating member and the movable spring piece to prevent arc transfer.

12. The relay contact assembly according to claim 11, characterized in that: The portion where the movable spring piece contacts the pair of static contact lead-out terminals is a first contact portion, and the second step and / or the second gap is arranged between the inner edges of the first contact portion.

13. The relay contact assembly according to claim 12, characterized in that: The second arc-isolating member includes a column, the top surface of the column facing the static contact lead-out end protrudes from the top surface of the movable spring piece facing the static contact lead-out end, so that the second step is formed between the top surface of the column and the top surface of the movable spring piece.

14. The relay contact assembly according to claim 13, characterized in that: The side wall of the movable spring is provided with a mounting groove, the column is at least partially arranged in the mounting groove, and the second gap is arranged between the column and the mounting groove.

15. The relay contact assembly according to claim 14, characterized in that: The second gap is arranged along the axial direction of the column.

16. The relay contact assembly according to claim 14, characterized in that: An end of the second gap facing the static contact lead-out end is provided with an open end, and an end of the second gap facing away from the static contact lead-out end is a closed end.

17. The relay contact assembly according to claim 14, characterized in that: The mounting groove includes a first mounting portion, the first mounting portion is arranged on a side of the movable spring piece facing the static contact lead-out end, the column passes through the first mounting portion, and the second gap is arranged between the column and the first mounting portion.

18. The relay contact assembly according to claim 17, wherein the second gap is a trumpet-shaped structure, and a large opening end of the second gap is arranged toward the static contact lead-out end.

19. The relay contact assembly according to claim 17, wherein the mounting groove further comprises a fixing portion, the fixing portion is communicated with the first mounting portion, and the column is clamped on the fixing portion for fixing the second arc isolation member.

20. The relay contact assembly according to claim 19, the mounting groove also includes a second mounting portion, the second mounting portion is arranged on a side of the movable spring away from the static contact lead-out end, the second mounting portion is connected to the first mounting portion through the fixing portion, the column is passed through the second mounting portion and a second guide gap is provided between the outer wall of the column and the inner wall of the second mounting portion, and the second guide gap is used for guiding the column.

21. The relay contact assembly according to claim 14, characterized in that: The number of the columns and the mounting grooves is two, the two mounting grooves are arranged on both sides of the movable spring piece along the width direction of the movable spring piece and between the inner edges of the first contact portion, and the two columns are arranged correspondingly to the two mounting grooves.

22. The relay contact assembly according to claim 13, characterized in that: The second arc-isolating member further comprises a limiting portion, which is arranged on a side of the column away from the movable spring piece and can abut against the movable spring piece for limiting the position of the column.

23. The relay contact assembly according to claim 13, characterized in that: The second arc-isolating member further comprises an arc-isolating ring, and the arc-isolating ring wraps around the end of the movable spring piece along the length direction of the movable spring piece and at least a part of the side wall of the movable spring piece.

24. The relay contact assembly according to claim 23, characterized in that: The second arc-isolating member further comprises a connecting portion, which is arranged at the bottom of the end of the moving spring piece away from the static contact lead-out end and is respectively connected to the two ends of the arc-isolating ring, and the column is arranged at the connecting portion.

25. The relay contact assembly according to any one of claims 1 to 24, characterized in that: The number of the second arc-isolating members is two, and the two second arc-isolating members are respectively arranged at two ends of the movable spring piece along the length direction of the movable spring piece.

26. The relay contact assembly according to any one of claims 1 to 24, characterized in that: The first arc-isolating member and the second arc-isolating member are both made of insulating material.

27. The relay contact assembly according to any one of claims 1 to 24, characterized in that: The side of the movable spring piece facing the static contact lead-out end is the top surface of the movable spring piece, and the top surface of the movable spring piece is provided with an arc isolation portion, which is used to prevent the arc from moving toward the direction in which the pair of static contact lead-out ends approach each other.

28. The relay contact assembly according to claim 27, characterized in that: The arc isolation portion is a first arc isolation groove; and / or, The arc isolation portion is an arc isolation rib.

29. The relay contact assembly according to claim 27, characterized in that: The portion where the movable spring piece contacts the pair of static contact lead-out terminals is a first contact portion, and the arc-isolating portion is arranged between the inner edges of the first contact portion.

30. A relay, characterized in that: A relay contact assembly comprising any one of claims 1-29.

31. The relay according to claim 30, characterized in that The relay also includes an anti-short circuit component, which is at least arranged on one side of the moving reed toward the static contact lead-out end, and generates suction when a large fault current occurs in the moving reed, so as to resist the electromotive repulsion between the moving reed and the static contact lead-out end.

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