Arc isolation structure, contact unit, and relay

Abstract

The present disclosure relates to the technical field of power, and provides an arc isolation structure, a contact unit, and a relay. The arc isolation structure comprises a first arc isolation member, the first arc isolation member being arranged on the exterior of a static contact lead-out end, and a pair of static contact lead-out ends being in contact with or separated from a moving reed; a first step and / or a first gap are / is arranged between the first arc isolation member and the static contact lead-out end so as to obstruct arc transfer. The first step and / or the first gap may prevent an arc from transferring towards a direction in which the pair of static contact lead-out ends are close to and facing one another, preventing the occurrence of a situation that two sets of moving contacts and static contacts between the moving reed and the pair of static contact lead-out ends generate arc shorting and short-circuiting. The first step and / or the first gap may prevent an arc from transferring upwards along outer walls of the static contact lead-out ends in a direction away from the moving reed, further reducing ablation of the outer walls of the static contact lead-out ends by the arc, and improving an arc extinguishing capability and effect, so as to improve break-off capabilities between moving contacts and static contacts corresponding to the moving reed and the static contact lead-out ends.

Description

Arc isolation structure, contact unit and relay

[0001] Cross-references

[0002] This disclosure claims priority to Chinese patent applications with application numbers 202322110339.4, 202310986454.X and 202310986397.5 filed on August 7, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure generally relates to the field of electric power technology, and in particular to an arc isolation structure, a contact unit, and a relay. Background Art

[0004] A relay is an electronic control device used in automatic control circuits. It has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It effectively acts as an "automatic switch" that uses a smaller current to control a larger current. Therefore, it performs functions such as automatic regulation, safety protection, and circuit switching in circuits. As a type of relay, most existing high-voltage DC relays use a direct-acting, reed-operated structure, utilizing two stationary contacts and a single reed to connect and disconnect loads.

[0005] High-voltage DC relays disconnect loads by creating a directional magnetic field through the use of permanent magnets. When the moving and static contacts separate and an arc is generated, the arc rapidly elongates under the influence of the magnetic field until the arc is disconnected, effectively disconnecting the load. The most demanding interruption condition is called "limit interruption," where the load is several times the rated load. If the arc is not stable enough at the moving and static contacts and migrates across their surfaces, it will not extinguish the arc along the primary magnetic path, ultimately preventing the arc from being interrupted. Overload and overheating can lead to explosion and burnout of the product.

[0006] Furthermore, to meet short-circuit resistance requirements, existing high-voltage DC relays typically incorporate soft magnetic materials, known as anti-short-circuit rings, near the internal moving and static contacts. This creates electromagnetic attraction to counteract electrokinetic repulsion when a short-circuit current flows. However, since soft magnetic materials become magnetized near current-carrying conductors, they attract arcs.

[0007] Due to the soft magnetic element, or short-circuit ring, during the relay's ultimate breaking state, the arc is affected not only by the magnetic blown field but also by the magnetized soft magnetic element. This causes arc turbulence and reduces the high-voltage DC relay's ultimate breaking capability. This can also cause the short-circuit ring to burn out, compromising the short-circuit protection. If auxiliary contacts are located above the short-circuit ring, the arc could also damage them.

[0008] Summary of the Invention

[0009] The present disclosure provides an arc isolation structure, a contact unit, and a relay, which reduce the reliability of arc interruption and have good safety.

[0010] According to a first aspect of the present disclosure, there is provided an arc isolation structure, comprising:

[0011] a first arc-isolating member, arranged outside the static contact lead-out end, wherein the pair of static contact lead-out ends are in contact with or separated from the movable spring piece;

[0012] Wherein, a first step and / or a first gap is provided between the first arc-isolating member and the static contact lead-out end, for preventing arc transfer.

[0013] In some embodiments, the first arc-isolating member is sleeved on the outside of the static contact lead-out end.

[0014] In some embodiments, a static contact is provided at the bottom of the static contact lead-out end, and an outer peripheral wall of the first arc-isolating member protrudes from an outer peripheral wall of the static contact;

[0015] Wherein, the static contact lead-out terminal and the static contact are an integrally formed structure or a split structure.

[0016] In some embodiments, the outer wall of the first arc isolation 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 isolation member facing one end of the movable spring and the outer peripheral wall of the static contact lead-out end corresponding thereto.

[0017] In some embodiments, the first gap is provided between an inner wall of a bottom portion of the first arc-isolating member facing one end of the movable spring and an outer wall of the static contact lead-out end.

[0018] In some embodiments, an end of the first gap facing the movable spring is provided with an open end, and an end of the first gap away from the movable spring is provided with a closed end.

[0019] In some embodiments, the first gap is provided 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.

[0020] In some embodiments, 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 positioning portion, and the other is provided with a positioning matching portion, and the positioning portion is snapped into the positioning matching portion.

[0021] In some embodiments, the first arc isolation member is made of insulating material.

[0022] In some embodiments, a first guide gap is provided between the top inner wall of the first arc-isolating member away from one end of the movable spring and the outer wall of the corresponding static contact lead-out end, and the first guide gap is used for guiding the static contact lead-out end.

[0023] According to the second aspect of the present disclosure, a contact unit of an embodiment of the present disclosure includes a movable spring, a pair of static contact lead-out terminals and the above-mentioned arc isolation structure, wherein the movable spring is used to contact or separate with a pair of static contact lead-out terminals, the first arc isolation member of the arc isolation structure is arranged on the outside of the static contact lead-out terminals, and the arc isolation structure is used to hinder arc transfer.

[0024] In some embodiments, the contact portions between the movable spring and the pair of static contact terminals are two first contact portions, and at least part of the first step and / or the first gap is disposed between inner edges of the two first contact portions.

[0025] In some embodiments, the side of the movable spring facing the static contact lead-out end is the top surface of the movable spring, and the top surface of the movable spring 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 face each other.

[0026] In some embodiments, the arc isolation portion is a first arc isolation groove; and / or,

[0027] The arc isolation portion is an arc isolation rib.

[0028] In some embodiments, the contact portions between the movable spring and the pair of static contact lead-out terminals are two first contact portions, and the arc-isolating portion is provided between inner edges of the two first contact portions.

[0029] In some embodiments, the contact unit further includes an insulating cover, the movable spring is movably disposed in the insulating cover, and the static contact lead-out end passes through the insulating cover and is at least partially disposed in the insulating cover.

[0030] In some embodiments, the first arc-isolating member is disposed outside a portion of the static contact lead-out terminal located within the insulating cover.

[0031] In some embodiments, an anti-short-circuit component is further included. The anti-short-circuit component is arranged at least on the side of the movable spring piece facing the static contact lead-out end, and generates suction when a large fault current occurs in the movable spring piece, so as to resist the electric repulsion between the movable spring piece and the static contact lead-out end.

[0032] According to a third aspect of the present disclosure, a relay according to an embodiment of the present disclosure includes the above-mentioned contact unit.

[0033] One embodiment of the present disclosure has the following advantages or beneficial effects:

[0034] The arc isolation structure provided by the embodiment of the present disclosure is provided with a first step and / or a first gap at the contact position between the first arc isolation member and the static contact lead-out terminal 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 and / or the first gap can block the arc from transferring in the direction where the pair of static contact lead-out terminals face each other, thereby avoiding the situation where the two sets of moving and static contacts between the moving spring and the pair of static contact lead-out terminals generate an arc short circuit; second, the first step and / or the first gap can block the arc from transferring upward along the outer wall of the static contact lead-out terminal in the direction away from the moving spring, further reducing the arc erosion of the outer wall of the static contact lead-out terminal, improving the arc extinguishing ability and effect, and thereby improving the breaking ability between the moving contact and the static contact corresponding to the moving spring and the static contact lead-out terminal.

[0035] In the contact unit and relay provided by the disclosed embodiments, a movable spring of the contact unit engages or disengages with a pair of stationary contact leads. When the movable spring contacts the stationary contacts at the bottom of the pair of stationary contact leads, current flows into one stationary contact lead and out of the other after passing through the movable spring, thereby connecting the load. When an arc moves up and down along the outer wall of the stationary contact lead under the influence of a magnetic field, an arc-isolating structure disposed outside the stationary contact lead reduces the risk of arc erosion of the sidewalls of the stationary contact lead.

[0036] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of preferred embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] To better understand the present disclosure, 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 disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing. The above and other features and advantages of the present disclosure will become more apparent by describing in detail its exemplary embodiments with reference to the accompanying drawings.

[0038] FIG1 shows a structural diagram of a relay provided in accordance with a first embodiment of the present disclosure;

[0039] FIG2 shows a cross-sectional view taken along the line A1-A1 of FIG1 ;

[0040] FIG3 shows a first schematic diagram of 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 disclosure;

[0041] FIG4 shows a second schematic diagram of 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 disclosure;

[0042] FIG5 shows a cross-sectional view taken along line C1-C1 in FIG4 ;

[0043] FIG6 shows a partial enlarged view of FIG2 at position B0;

[0044] FIG7 shows a first structural diagram of a movable reed in a relay provided in the first embodiment of the present disclosure;

[0045] FIG8 shows a second structural diagram of the movable reed in the relay provided in the first embodiment of the present disclosure;

[0046] FIG9 shows an exploded schematic diagram of a relay provided in the first embodiment of the present disclosure;

[0047] FIG10 shows a second structural diagram of a relay provided in the first embodiment of the present disclosure;

[0048] FIG11 shows a second exploded schematic diagram of the relay provided in the first embodiment of the present disclosure;

[0049] FIG12 shows a schematic structural diagram of a contact container in a relay provided in Embodiment 1 of the present disclosure;

[0050] FIG13 is a schematic structural diagram of a push rod unit in a relay provided in Embodiment 1 of the present disclosure;

[0051] FIG14 shows a first structural diagram of a movable reed in a relay provided in the second embodiment of the present disclosure;

[0052] FIG15 shows a second structural diagram of a movable reed in a relay provided in the second embodiment of the present disclosure;

[0053] FIG16 shows a third structural diagram of the movable reed in the relay provided in the second embodiment of the present disclosure;

[0054] FIG17 shows a fourth structural diagram of the movable reed in the relay provided in the second embodiment of the present disclosure;

[0055] FIG18 shows a fifth structural diagram of a movable reed in a relay provided in the second embodiment of the present disclosure;

[0056] FIG19 shows a sixth structural diagram of the movable reed in the relay provided in the second embodiment of the present disclosure;

[0057] FIG20 shows a first structural diagram of a movable reed in a relay provided in the third embodiment of the present disclosure;

[0058] FIG21 shows a second structural diagram of the movable reed in the relay provided in the third embodiment of the present disclosure.

[0059] FIG22 shows a first structural diagram of a relay provided in a fourth embodiment of the present disclosure;

[0060] FIG23 shows a cross-sectional view taken along the line A2-A2 of FIG22 ;

[0061] FIG24 shows a first exploded schematic diagram of a relay provided in a fourth embodiment of the present disclosure;

[0062] FIG25 shows a first schematic diagram of the coordination between the movable spring and the first arc-isolating member in the relay provided by the fourth embodiment of the present disclosure;

[0063] FIG26 shows a second schematic diagram of the coordination between the movable spring and the first arc-isolating member in the relay provided by the fourth embodiment of the present disclosure;

[0064] FIG27 shows a cross-sectional view taken along the line B1-B1 of FIG26 ;

[0065] FIG28 shows a partial enlarged view of position B2 in FIG26 ;

[0066] FIG29 shows a third schematic diagram of the coordination between the movable spring and the first arc-isolating member in the relay provided in the fourth embodiment of the present disclosure;

[0067] FIG30 shows a cross-sectional view taken along the line B3-B3 of FIG29 ;

[0068] FIG31 shows a partial enlarged view of position B4 in FIG29;

[0069] FIG32 shows a second explosion diagram of a relay provided in the fourth embodiment of the present disclosure;

[0070] FIG33 shows a first structural diagram of a movable reed in a relay provided in a fourth embodiment of the present disclosure;

[0071] FIG34 shows a second structural diagram of a movable reed in a relay provided in the fourth embodiment of the present disclosure;

[0072] FIG35 shows a second structural diagram of a relay provided in the fourth embodiment of the present disclosure;

[0073] FIG36 shows a schematic structural diagram of a contact container in a relay provided in a fourth embodiment of the present disclosure;

[0074] FIG37 shows a schematic structural diagram of a push rod unit in a relay provided in a fourth embodiment of the present disclosure;

[0075] FIG38 shows a first structural diagram of a movable reed in a relay provided in the fifth embodiment of the present disclosure;

[0076] FIG39 shows a second structural diagram of the movable reed in the relay provided in the fifth embodiment of the present disclosure;

[0077] FIG40 shows a third structural diagram of the movable reed in the relay provided in the fifth embodiment of the present disclosure;

[0078] FIG41 shows a fourth structural diagram of a movable reed in a relay provided in the fifth embodiment of the present disclosure;

[0079] FIG42 shows a fifth structural diagram of a movable reed in a relay provided in the fifth embodiment of the present disclosure;

[0080] FIG43 shows a sixth structural diagram of the movable reed in the relay provided in the fifth embodiment of the present disclosure;

[0081] FIG44 shows a first structural diagram of a movable reed in a relay provided in a sixth embodiment of the present disclosure;

[0082] FIG45 shows a second structural diagram of the movable spring in the relay provided in the sixth embodiment of the present disclosure.

[0083] FIG46 shows a first structural diagram of a relay provided in Embodiment 7 of the present disclosure;

[0084] FIG47 shows a cross-sectional view taken along line A3-A3 of FIG46 ;

[0085] FIG48 shows a first exploded schematic diagram of a relay provided in Example 7 of the present disclosure;

[0086] FIG49 shows a first schematic diagram of the coordination between the static contact lead-out terminal and the first arc-isolating member in the relay provided in the seventh embodiment of the present disclosure;

[0087] FIG50 shows a second schematic diagram of the coordination between the static contact lead-out terminal and the first arc-isolating member in the relay provided in the seventh embodiment of the present disclosure;

[0088] FIG51 shows a cross-sectional view taken along line C2-C2 of FIG50;

[0089] FIG52 is a partial enlarged view of the first arc isolation member shown in FIG47;

[0090] FIG53 shows a first schematic diagram of the coordination between the movable spring and the second arc-isolating member in the relay provided in the seventh embodiment of the present disclosure;

[0091] FIG54 shows a second schematic diagram of the coordination between the movable spring and the second arc-isolating member in the relay provided in the seventh embodiment of the present disclosure;

[0092] FIG55 shows a cross-sectional view taken along the line B5-B5 of FIG54 ;

[0093] FIG56 shows a partial enlarged view of position B6 in FIG54;

[0094] FIG57 shows a third schematic diagram of the coordination between the movable spring and the second arc-isolating member in the relay provided by the seventh embodiment of the present disclosure;

[0095] FIG58 shows a cross-sectional view taken along the line B7-B7 of FIG57 ;

[0096] FIG59 shows a partial enlarged view of position B8 in FIG57;

[0097] FIG60 shows a second explosion diagram of a relay provided in Example 7 of the present disclosure;

[0098] FIG61 shows a first structural diagram of a movable reed in a relay provided in Embodiment 7 of the present disclosure;

[0099] FIG62 shows a second structural diagram of the movable reed in the relay provided in the seventh embodiment of the present disclosure;

[0100] FIG63 shows a second structural diagram of a relay provided in Embodiment 7 of the present disclosure;

[0101] FIG64 is a schematic diagram showing the structure of a contact container in a relay provided in Embodiment 7 of the present disclosure;

[0102] FIG65 shows a first structural diagram of a movable reed in a relay provided in the eighth embodiment of the present disclosure;

[0103] FIG66 shows a second structural diagram of the movable reed in the relay provided in the eighth embodiment of the present disclosure;

[0104] FIG67 shows a third structural diagram of the movable reed in the relay provided in the eighth embodiment of the present disclosure;

[0105] FIG68 shows a fourth structural diagram of a movable reed in a relay provided in the eighth embodiment of the present disclosure;

[0106] FIG69 shows a fifth structural diagram of a movable reed in a relay provided in the eighth embodiment of the present disclosure;

[0107] FIG70 shows a sixth structural diagram of a movable reed in a relay provided in the eighth embodiment of the present disclosure;

[0108] FIG71 shows a first structural diagram of a movable reed in a relay provided in Embodiment 9 of the present disclosure;

[0109] FIG72 shows a second structural diagram of the movable reed in the relay provided in the ninth embodiment of the present disclosure.

[0110] The description of the accompanying drawings is as follows:

[0111] 1. Contact container; 2. Contact assembly; 4. Push assembly; 5. Arc extinguishing unit; 6, 7. First arc-isolating member; 8. Second arc-isolating member; 11. Insulating cover; 111. Through hole; 12. Frame; 21. Static contact lead-out terminal; 211. Positioning and fitting portion; 22. Moving spring; 221. Thrust portion; 2211. Through hole; 220. First contact portion; 222. First arc-isolating groove; 223. Mounting groove; 2231. First mounting portion; 2232. Fixing portion; 2233. Second mounting portion; 225. Arc-isolating rib; 31. Upper magnetic conductor; 32. Lower magnetic conductor; 41. Push rod unit; 411. Push rod; 41 2. Limiting protrusion; 413. Base; 42. U-shaped bracket; 421. Limiting hole; 43. Elastic member; 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; 51. Arc-extinguishing magnet; 52. Yoke clamp; 60, 72. First gap; 61, 71. First step; 62. Positioning portion; 63, 73. First guide gap; 70. Column; 74. Limiting portion; 75. Arc-isolating ring; 76. Connecting portion; 81. Second step; 82. Second gap; 83. Second guide gap. DETAILED DESCRIPTION

[0112] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure. 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 disclosure.

[0113] In the description of this disclosure, unless otherwise expressly provided or limited, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more; and the term "and / or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" or "an" object is also intended to mean one of a possible plurality of such objects.

[0114] Unless otherwise specified or explained, the terms "connect," "fixed," etc. should be understood broadly. For example, "connected" may refer to a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; and "connected" may refer to a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0115] Furthermore, in the description of the present disclosure, it should be understood that the directional words such as “upper”, “lower”, “inner” and “outer” described in the example embodiments of the present disclosure are described based on the angles shown in the accompanying drawings and should not be understood as limiting the example embodiments of the present disclosure. 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” or “outer”, it can not only be directly connected to the other (one or more) elements “upper”, “lower” or “inner” or “outer”, but can also be indirectly connected to the other (one or more) elements “upper”, “lower” or “inner” or “outer” through an intermediate element.

[0116] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0117] Example 1

[0118] This embodiment provides a contact unit, as shown in FIG1-FIG2 , which includes a movable spring 22 and a pair of stationary contact lead-out terminals 21 . The movable spring 22 is used to contact or separate from the pair of stationary contact lead-out terminals 21 .

[0119] In the contact unit provided in this embodiment, the movable spring 22 contacts or separates with a pair of static contact lead-out terminals 21. When the movable spring 22 contacts the static contacts at the bottom of the pair of static contact lead-out terminals 21, current flows into one static contact lead-out terminal 21, passes through the movable spring 22, and flows out from the other static contact lead-out terminal 21, thereby connecting the load.

[0120] In one embodiment, a static contact is provided 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.

[0121] 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 provided at the bottom of the static contact lead-out terminal 21 .

[0122] When the movable spring 22 and the static contacts at the bottom of the pair of static contact lead-out terminals 21 separate, as the movable and static contacts between the movable spring 22 and the static contact lead-out terminals 21 separate and the arc is drawn by magnetic blowing, the arc is stretched to a certain extent and the arc is automatically disconnected; if the arc is not stable enough at the movable and static contacts, the arc will transfer on the surface of the movable spring 22 or the static contact lead-out terminals 21, which will result in the arc being unable to be extinguished mainly along the magnetic blowing arc path, and finally the arc cannot be disconnected, and even the relay will explode and burn.

[0123] In order to solve this problem, as shown in FIG. 2 to FIG. 5 , the contact unit provided in this embodiment further includes an arc isolation structure, which is arranged outside the static contact lead-out terminal 21 and is used to prevent arc transfer.

[0124] The arc isolation structure is arranged outside the static contact lead-out terminal 21. 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 arc isolation structure reduces the risk of the arc burning the side wall of the static contact lead-out terminal 21.

[0125] Specifically, as shown in Figures 5 and 6, the arc isolation structure provided in this embodiment includes a first arc isolation member 6, which is disposed outside the static contact lead-out terminal 21. A first step 61 and / or a first gap 60 is provided between the first arc isolation member 6 and the static contact lead-out terminal 21 to prevent arc transfer.

[0126] The arc isolation structure provided in this embodiment has a first step 61 and a first gap 60 provided at the contact position between the first arc isolation member 6 and the static contact lead-out terminal 21 and on the path of arc movement, i.e., a bend is formed in the arc path, which can dissipate the kinetic energy of the arc and better prevent the transfer of the arc. The arc transfer direction has two directions: first, the first step 61 and the first gap 60 can prevent the arc from transferring in the direction where the pair of static contact lead-out terminals 21 face each other, thereby preventing the two sets of moving and static contacts between the moving spring 22 and the pair of static contact lead-out terminals 21 from generating an arc short circuit; second, the first step 61 and the first gap 60 can prevent the arc from transferring upward along the outer wall of the static contact lead-out terminal 21 in a direction away from the moving spring 22, thereby reducing the arc erosion of the outer wall of the static contact lead-out terminal 21, and at the same time improving the arc extinguishing ability and effect, thereby improving the breaking capacity between the moving contact and the static contact corresponding to the moving spring 22 and the static contact lead-out terminal 21.

[0127] In one embodiment, the first arc isolation member 6 is made of insulating material.

[0128] 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 material has good performance in breaking or cooling the arc, strong arc extinguishing ability and good arc extinguishing effect.

[0129] It is understandable that in some other embodiments, the first arc-isolating member 6 may also be made of metal material.

[0130] In one embodiment, the first arc-isolating member 6 is sleeved on the outside of the static contact lead-out terminal 21 .

[0131] The first arc-isolating member 6 can also be an arc-isolating sleeve, which is sleeved on the outside of the static contact lead-out terminal 21 to perform arc isolation 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.

[0132] It should be noted 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 cylindrical, elliptical, square, and polygonal shapes.

[0133] 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.

[0134] Specifically, the first arc-isolating member 6 can be an integrated structure. For example, the first arc-isolating member 6 is in an integrated cylindrical or ring-shaped form and is sleeved on the outside of the static contact lead-out end 21. The integrated molding structure reduces the number of parts assembly steps and has a relatively low production cost.

[0135] Furthermore, the first arc-isolating member 6 can also be a split structure, comprising a plurality of insulating units arranged circumferentially along the static contact lead-out terminal 21 and capable of being joined end-to-end to form a cylindrical or polygonal cylindrical structure. In other embodiments, the plurality of insulating units can be arranged in an annular pattern around the static contact lead-out terminal 21, or a single insulating unit can be disposed externally of the static contact lead-out terminal 21. This embodiment is not limited thereto as long as both insulation and arc extinguishing effects are achieved.

[0136] In one embodiment, as shown in FIG6 , the outer peripheral wall of the first arc-isolating 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-isolating member 6 and the outer peripheral wall of the corresponding static contact lead-out terminal 21 .

[0137] 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, then a first step 61 is formed between the bottom wall of the first arc-isolating member 6 and the outer peripheral wall of the corresponding static contact lead-out terminal 21. 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's erosion of the outer peripheral wall of the static contact lead-out terminal 21 and in the direction away from the dynamic spring 22, so as to achieve the purpose of dissipating arc energy.

[0138] The outer peripheral wall of the first arc-isolating member 6 protrudes from the outer peripheral wall of the static contact.

[0139] The outer peripheral wall of the first arc-isolating member 6 protrudes from the outer peripheral wall of the static contact, and 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 end 21 and in the direction away from the dynamic reed 22, thereby achieving protection for the static contact lead-out end 21.

[0140] In one embodiment, as shown in Figure 6, a first gap 60 is provided between the inner wall of the bottom of the first arc-isolating 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-isolating member 6 and the outer peripheral wall of the bottom of the static contact lead-out terminal 21.

[0141] 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, so that a height difference appears on 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.

[0142] In one embodiment, an end of the first gap 60 facing the movable reed 22 is provided with an open end, and an end of the first gap 60 away from the movable reed 22 is provided with a closed end.

[0143] 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.

[0144] It should be 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, which is used to limit the arc from transferring along the static contact lead-out end 21 and in a direction away from the movable reed 22 and can limit the arc from transferring in the direction of the center line of the movable reed 22. The first arc isolation member 6 made of insulating material has the ability to disconnect the arc or cool the arc to achieve the effect of extinguishing the arc.

[0145] In one embodiment, as shown in FIG6 , the inner wall positioning portion 62 of the first arc-isolating member 6 and the outer wall of the static contact lead-out terminal 21 are provided with a positioning matching portion 211 , and the positioning portion 62 is snap-fitted to the positioning matching portion 211 .

[0146] When the first arc-isolating member 6 is installed on the static contact lead-out terminal 21, the positioning portion 62 and the positioning and fitting portion 211 can initially position the first arc-isolating member 6, thereby improving the installation accuracy of the first arc-isolating member 6. At the same time, the positioning portion 62 is engaged with the positioning and fitting portion 211 to secure the first arc-isolating member 6 and prevent it from falling.

[0147] The positioning portion 62 and the positioning mating portion 211 can be stop steps, annular positioning grooves, or positioning protrusions provided on the static contact lead terminal 21. For example, the positioning portion 62 can be an annular clamping block provided on the inner wall of the first arc-isolating member 6, and the positioning mating portion 211 can be an annular clamping groove provided on the outer wall of the static contact lead terminal 21, with the annular clamping block engaging the annular clamping groove. The positioning portion 62 and the positioning mating portion 211 provided in this embodiment are not limited to other forms. Any form that can achieve positioning and fixing of the first arc-isolating member 6 relative to the static contact lead terminal 21 is within the scope of protection of this embodiment.

[0148] In some other embodiments, the positioning portion may be provided on the outer wall of the static contact lead-out terminal 21 , and correspondingly, the positioning matching portion is provided on the inner wall of the first arc-isolating member 6 .

[0149] In one embodiment, as shown in FIG6 , a first guide gap 63 is provided between the top inner wall of the first arc-isolating member 6 away from the end of the movable spring 22 and the outer wall of the corresponding static contact lead-out terminal 21 . The first guide gap 63 is used to guide the static contact lead-out terminal 21 .

[0150] Since when the first arc-isolating member 6 is installed on the static contact lead-out terminal 21, the first arc-isolating member 6 needs to be sleeved 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 reason, 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, thereby facilitating the installation of the first arc-isolating member 6.

[0151] 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 dynamic spring 22. The large end of the first gap 60 provides an entrance for the bottom of the static contact lead-out end 21 to pass through, further improving the convenience of installation of the first arc-isolating member 6.

[0152] It should be noted that, in some other embodiments, a second arc-isolating member (not shown in the figures) may be further provided outside the movable spring piece 22 to prevent arc transfer.

[0153] In one embodiment, the contact unit provided in this embodiment also includes a contact container 1 (as shown in Figures 1-2), the contact container 1 includes an insulating cover 11, the movable spring 22 is movably arranged in the insulating cover 11, and the static contact lead-out end 21 is passed through the insulating cover 11 and is at least partially arranged in the insulating cover 11.

[0154] The contact container 1 also includes a frame 12, through which the insulating cover 11 is connected to the yoke plate. The insulating cover 11 and the yoke plate form a contact chamber. The contact chamber provides an arc-isolating environment for the contact between the movable reed 22 and the static contact terminal 21, ensuring the reliability of the relay during operation.

[0155] Of course, in some other implementations, the positioning fitting portion 211 can also be provided on the inner wall of the insulating cover 11 . Since the static contact lead-out terminal 21 partially extends into the insulating cover 11 , the first arc-isolating member 6 can also be limited.

[0156] 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.

[0157] In one embodiment, a through hole 111 is provided on the top of the insulating cover 11 , the static contact lead-out terminal 21 is passed through the through hole 111 , and the diameter of the outer peripheral wall of the first arc-isolating member 6 may be less than or equal to the diameter of the through hole 111 .

[0158] Among them, the through hole 111 of the insulating cover 11 provides a space for the static contact lead-out terminal 21 to pass through, and the diameter of the outer wall of the first arc-isolating member 6 can be less than or equal to the diameter of the through hole 111, so that the first arc-isolating member 6 can at least partially block the through hole 111 of the insulating cover 11, preventing arc splashes from entering the gap between the static contact lead-out terminal 21 and the through hole 111, so as to solve the problem of arc erosion splashes and contamination of the inner wall of the insulating cover 11, and can increase the arc creepage distance and insulation resistance.

[0159] It can be understood that the outer peripheral contour of the first arc-isolating member 6 provided in this embodiment can be larger than the diameter of the through hole 111 on the top wall of the insulating cover 11, but it is not necessarily larger than the through hole 111 on the top wall of the insulating cover 11. The first step 61 and the first gap 60 formed between the bottom end of the first arc-isolating member 6 and the static contact lead-out end can be used to block the transfer of the arc or the arc root.

[0160] In one embodiment, as shown in Figures 2 and 7, the side of the movable spring 22 provided in this embodiment facing the static contact lead-out terminal 21 is the top surface of the movable spring 22, and the top surface of the movable spring 22 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 terminals 21 face each other.

[0161] The arc isolation portion is provided on the top surface of the movable spring piece 22 to prevent the arc from transferring along the top surface of the movable spring piece 22, thereby isolating and cutting off the arc transfer path on the top surface of the movable spring piece 22 and preventing the arc from transferring toward the center line of the length direction of the movable spring piece 22, thereby avoiding the arc short circuit generated by the two sets of movable and static contacts between the movable spring piece 22 and the pair of static contact lead-out terminals 21, so that the arc is kept on the originally set arc extinguishing path of the magnetic blowing magnetic field, thereby being able to extinguish the arc efficiently and improving the arc extinguishing capability.

[0162] In one embodiment, the arc isolation portion is disposed between inner edges of the two first contact portions 220 of the movable reed 22 .

[0163] The portion where the movable spring 22 contacts the pair of static contact terminals 21 is the first contact portion 220. The arc isolating portion is provided between the inner edges of the two first contact portions 220 to cut off the path of the arc from transferring inwardly of the static contact terminals 21, thereby preventing the arc short circuit generated by the two sets of movable and static contacts between the movable spring 22 and the pair of static contact terminals 21, thereby ensuring efficient and thorough arc extinguishing.

[0164] It should be noted that the inner side specifically refers to the side where the pair of static contact leads 21 face each other (as shown in FIG2 , Q is the direction in which the pair of static contact leads 21 face each other, and M is the centerline of the static contact leads 21), or the side close to the centerline W of the length direction of the movable spring 22 (as shown in FIG7 , L is the length direction of the movable spring 22, and T is the width direction of the movable spring 22). Therefore, the arc isolation portion is provided on the inner side of the first contact portion 220.

[0165] It can be understood that at least a portion of the first step 61 and / or the first gap 60 is disposed between inner edges of the first contact portion 220 .

[0166] In one embodiment, as shown in Figures 7 and 8, there are two arc isolation portions, which are arranged corresponding to a pair of static contact lead-out terminals 21, and the distance between the outer edges of the two arc isolation portions along the length direction of the movable spring piece 22 is less than or equal to the distance between the inner edges of the first contact portion 220.

[0167] Specifically, since there are two static contact lead-out terminals 21, two arc-isolating portions are provided corresponding to the two static contact lead-out terminals 21 and are provided 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 blocked by the two arc-isolating portions respectively, playing a double arc-isolating role and further improving the arc-isolating effect.

[0168] In one embodiment, as shown in FIG7 , the arc isolation portion is a first arc isolation groove 222 ; as shown in FIG8 , the arc isolation portion is an arc isolation rib 225 . In other embodiments, the movable spring 22 may be provided with both the first arc isolation groove 222 and the arc isolation rib 225 .

[0169] The arc-isolating portion, comprising a first arc-isolating groove 222, is a recessed structure provided on the top surface of the movable spring 22. The arc-isolating portion, comprising an arc-isolating rib 225, is a protruding structure provided on the top surface of the movable spring 22. These two structures can address the problem of rapid arc transfer that can occur with a movable spring 22 having a flat top surface. The first arc-isolating groove 222 and / or arc-isolating rib 225 isolate and cut off the arc transfer path on the top surface of the movable spring 22, hindering the arc from migrating toward the longitudinal centerline of the movable spring 22, thereby preventing arc short circuits between the two sets of movable and static contacts between the movable spring 22 and the pair of static contact lead terminals 21.

[0170] Specifically, the first arc isolation groove 222 includes a first groove wall and a first groove bottom that are connected to each other. The arc root moves to the connection between the first groove wall and the top surface of the movable spring 22 to form a concentrated arc. The height difference between the top surface of the movable spring 22 facing the stationary contact lead-out terminal 21 and the first groove bottom serves to prevent the arc root from moving toward the pair of stationary contact lead-out terminals 21 facing each other.

[0171] 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 root 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 is 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.

[0172] In one embodiment, the first arc isolation groove 222 is a through groove along the width direction of the movable reed 22 .

[0173] If the first arc-isolating groove 222 extends along the length of the movable spring 22, the arc may transfer along the portion of the top surface of the movable spring 22 where the first arc-isolating groove 222 is not provided, posing the risk of arc short circuit. To this end, the first arc-isolating groove 222 is configured as a through groove along the width of the movable spring 22. Since the through groove runs through the width of the movable spring 22, after the arc enters the first arc-isolating groove 222, the arc transfer path toward the pair of static contact lead terminals 21 facing each other is completely cut off.

[0174] 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 .

[0175] 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 arc-shaped first arc-isolating groove 222 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 blocking the transfer path of the arc in all directions.

[0176] 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 portion where the first arc-isolating groove 22 is not provided, and the contact portion is used to contact the static contact lead-out end 21.

[0177] It should be noted that, as shown in FIG. 7-FIG . 8 , the first arc-isolating groove 222 can be replaced by an arc-isolating rib 225 . The location and shape of the arc-isolating rib 225 are similar to those of the first arc-isolating groove 222 and therefore will not be described in detail.

[0178] This embodiment further provides a relay, comprising the above-mentioned contact unit.

[0179] In the relay provided in this embodiment, the movable spring 22 of the contact unit contacts or separates with a pair of static contact lead-out terminals 21. When the movable spring 22 contacts the static contacts at the bottom of the pair of static contact lead-out terminals 21, current flows into one static contact lead-out terminal 21, passes through the movable spring 22, and flows out from the other static contact lead-out terminal 21, thereby connecting the load.

[0180] In one embodiment, as shown in Figures 9 to 13, the relay further includes a pushing assembly 4, which includes a push rod unit 41, an elastic member 43, and a U-shaped bracket 42. 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 movable 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 movable spring 22. The elastic member 43 can provide elastic force, so that the movable spring 22 has a tendency to move away from the base 413 and closer to the static contact lead-out terminal 21.

[0181] 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.

[0182] As shown in Figures 9-13, the relay's driving assembly 4 also includes an electromagnet unit 44, which is located on the side of the yoke plate facing away from the insulating cover 11. A push rod unit 41 is drivingly connected to the electromagnet unit 44. The push rod unit 41 is movably disposed within the driving chamber enclosed by the metal cover and the yoke plate, and passes through a hole in the yoke plate to abut against the movable spring 22. When the electromagnet unit 44 is energized, it drives the push rod unit 41, thereby moving the movable spring 22 to contact or separate from the static contact terminal 21.

[0183] The electromagnet unit 44 includes a coil frame 441, a coil 442, a static iron core (not shown in the figure), a moving iron core 443, a U-shaped yoke 445, a magnetic tube 446 and a spring 447. The coil frame 441 is arranged in the U-shaped yoke 445, and the coil frame 441 is hollow and cylindrical and is formed of an insulating material. The magnetic tube 446 is passed through the coil frame 441, and the coil 442 surrounds the coil frame 441. The static iron core has a first perforation, which is corresponding to the through hole of the yoke plate for the push rod unit 41 to pass through. The moving iron core 443 is movably arranged in the magnetic tube 446 and is arranged opposite to the static iron core. The spring 447 is arranged between the static iron core and the moving iron core 443 and can abut against them respectively. The moving iron core 443 is connected to the push rod unit 41 and is used to be attracted by the static iron core 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.

[0184] The working process of the relay provided in this embodiment is as follows:

[0185] When the coil 442 is energized, the static iron core attracts the moving iron core 443, and the moving iron core 443 drives the push rod unit 41 to move upward. The spring 447 between the static iron core and the moving iron core 443 is compressed, and the push rod unit 41 pushes the moving spring 22 to move through the U-shaped bracket 42 and the elastic member 43, so that the two ends of the moving spring 22 are respectively in contact with the two static contact lead-out ends 21, and the moving and static contacts are closed.

[0186] When the coil 442 disconnects the current, the static iron core 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, and the moving and static contacts are separated.

[0187] When the short-circuit load is large, under the action of the short-circuit current, an electrodynamic repulsive force will be generated between the movable spring 22 and the static contact lead-out terminal 21, causing the contacts to spring open, resulting in arcing between the contacts and violent combustion, and even possible explosion.

[0188] To this end, the relay provided in this embodiment also includes an anti-short-circuit component, which is arranged on at least the upper side of the movable spring 22 along the axial direction of the static contact lead-out terminal 21, and generates suction when a large fault current occurs in the movable spring 22, which is used to resist the electric repulsion between the movable spring 22 and the static contact lead-out terminal 21.

[0189] Among them, the anti-short-circuit component can also be a short-circuit ring arranged between a pair of static contact lead-out terminals 21. For a 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 along the direction in which a pair of static contact lead-out terminals 21 face each other, thereby preventing the insulation between the contacts from decreasing or the arc short-circuiting.

[0190] In one embodiment, as shown in Figures 9 and 10, the relay further includes an arc extinguishing unit 5, which is disposed within a hollow chamber of the housing and is used to extinguish the arc in 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 disposed on either side of the insulating cover 11 and are arranged relative to each other along the length of the movable spring 22.

[0191] In this embodiment, two arc-extinguishing magnets 51 are located on the left and right sides of the insulating cover 11, respectively. The polarity of the facing surfaces of the two arc-extinguishing magnets 51 is opposite. In other words, the arc-extinguishing magnet 51 located on the left side of the insulating cover 11 has an S pole on its left side and an N pole on its right side, while the arc-extinguishing magnet 51 located on the right side of the insulating cover 11 has an S pole on its left side and an N pole on its right side.

[0192] 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 left side of the arc-extinguishing magnet 51 located on the left side of the insulating cover 11 is the S pole and the right side is the N pole, and the left side of the arc-extinguishing magnet 51 located on the right side of the insulating cover 11 is the N pole and the right side is the S pole.

[0193] By providing two arc-extinguishing magnets 51 disposed opposite to each other, a magnetic field can be formed around the contact assembly 2 .

[0194] Therefore, the arc generated between the static contact lead-out terminal 21 and the movable spring piece 22 will be stretched in a direction away from each other by the action of the magnetic field, thereby achieving arc extinguishing.

[0195] As shown in Figures 9 to 13, the arc extinguishing unit 5 also includes two yoke clamps 52, and the two yoke clamps 52 are arranged corresponding to the positions of the two arc extinguishing magnets 51. In addition, the two yoke clamps 52 surround the insulating cover 11 and the two arc extinguishing magnets 51. The design of the yoke clamps 52 surrounding the arc extinguishing magnets 51 can prevent the magnetic field generated by the arc extinguishing magnets 51 from spreading outward and affecting the arc extinguishing effect. The yoke clamps 52 are made of soft magnetic material. Soft magnetic materials may include but are not limited to iron, cobalt, nickel and their alloys.

[0196] Example 2

[0197] This embodiment is similar to the first embodiment, except that the structure of the first arc isolation groove 222 is different.

[0198] As shown in FIG. 14 to FIG. 16 , 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.

[0199] Specifically, as shown in FIG14 , the first arc isolation groove 222 is a linear 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 dynamic spring piece 22 is relatively narrow, the overall structural strength of the dynamic spring piece 22 is relatively large.

[0200] As shown in FIG15 , the first arc isolation groove 222 is a convex structure, so that the first arc isolation groove 222 is a broken line groove structure, which increases the degree of tortuosity of the arc root transmission path, thereby improving the arc extinguishing effect.

[0201] As shown in FIG16 , the first arc isolation groove 222 is an X-shaped structure, which includes two cross-arranged straight grooves, so that the arc roots on one side can be isolated from the transmission path by the two straight grooves, thereby playing a double arc isolation role with good isolation and arc extinguishing effects.

[0202] It is understandable that the shapes of the two first arc isolation grooves 222 in this embodiment may be the same or different. For example, one of the first arc isolation grooves 222 may be a convex structure, and the other may be a linear structure.

[0203] It is understandable 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 may also be an S-shaped structure, a conical structure, etc., and its specific shape can be adjusted according to actual production conditions.

[0204] It should be noted that, as shown in Figures 17 to 19, the first arc isolation groove 222 can be replaced by an arc isolation rib 225. The location 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.

[0205] Example 3

[0206] This embodiment is similar to the first embodiment, and the only difference is the number and structure of the arc isolation structures.

[0207] As shown in FIG. 20 and FIG. 21 , the embodiment provides one arc-isolating portion. The portion of the movable spring piece 22 not provided with the arc-isolating portion is located on both sides of the movable spring piece 22 in the length direction and contacts a pair of static contact lead-out terminals 21 respectively.

[0208] Specifically, when the arc isolation portion is the first arc isolation groove 222, since a first arc isolation groove 222 is located between a pair of static contact lead-out ends 21, the groove width of the first arc isolation groove 222 along the length direction of the movable spring piece 22 is relatively wide, and the portion of the movable spring piece 22 where the first arc isolation groove 22 is not provided and the portion located at both ends of the length direction of the movable spring piece 22 are two contact portions, and the two contact portions are respectively in contact with a pair of static contact lead-out ends 21. Arc isolation from two groups of movable and static contacts can be achieved by using a first arc isolation groove 22, which has a simple structure and relatively low production cost.

[0209] In one embodiment, as shown in FIG. 2 and FIG. 20 , the distance between the two side edges of the first arc isolation groove 222 along the length direction of the movable reed 22 is less than or equal to the distance between the bottoms of the pair of static contact lead-out terminals 21 .

[0210] 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, and 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 root shifting toward the center line of the movable spring piece 22.

[0211] It should be noted that, as shown in Figures 20 and 21, the first arc isolation groove 222 can be replaced by an arc isolation rib 225. The location and shape of the arc isolation rib 225 are similar to those of the first arc isolation groove 222, so they will not be described in detail.

[0212] Some other embodiments are similar to the first and second embodiments, except that other detailed structures of the movable spring 22 are added on the basis of the first or second embodiment.

[0213] The movable spring piece 22 provided in this embodiment may further be provided with a second arc isolation groove (not shown) 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 ends 21 face each other.

[0214] The second arc isolation groove is provided on the side wall of the movable spring piece 22 to prevent the arc from transferring along the side wall of the movable spring piece 22 toward the center line of the length direction of the movable spring piece 22, thereby isolating and cutting off the path of the arc transferring along the side wall of the movable spring piece 22, avoiding the arc short circuit generated by the two sets of movable and static contacts between the movable spring piece 22 and the 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 capability.

[0215] In one embodiment, the second arc isolation groove is disposed between inner edges of the two first contact portions 220 .

[0216] In other words, the second arc-isolating portion is arranged on the inner side of the static contact lead-out end 21 to cut off the path of the arc root transferring toward the inner side of the static contact lead-out end 21, thereby 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 ends 21, so as to ensure the high efficiency and thoroughness of arc extinguishing.

[0217] 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 22 along the length direction of the movable reed 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 22 along the width direction of the movable reed 22.

[0218] For example, the number of the second arc isolation grooves is four, with two second arc isolation grooves on each side of the movable spring piece 22 in the length direction, and two second arc isolation grooves on each side of the movable spring piece 22 in the 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 root can be isolated by the second arc isolation groove no matter how it moves along the side wall of the movable spring piece 22, thereby further improving the arc isolation effect.

[0219] In one embodiment, the second arc isolation groove includes a second groove wall and a second groove bottom 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 prevent the arc from moving toward the direction in which a pair of static contact lead-out ends 21 face each other.

[0220] Since the second arc isolation 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 a drop in the arc transfer path along the side wall of the movable spring piece 22. This drop makes it difficult for the arc to move toward the center line of the movable spring piece 22 in the longitudinal direction. The combination of the edge and the drop improves the arc extinguishing effect.

[0221] In one embodiment, the second arc isolation groove is a through groove along the axial direction of the static contact lead-out end 21 .

[0222] If the second arc-isolating groove extends along the length of the movable spring 22, the arc could migrate along the sidewall of the movable spring 22 where the second arc-isolating groove is not provided, posing a risk of arc short circuit. Therefore, the second arc-isolating groove is provided as a through groove along the axial direction of the stationary contact lead-out terminal 21. Since the through groove extends through the height of the movable spring 22, after the arc enters the second arc-isolating groove, the arc's migration path toward the facing direction of the pair of stationary contact lead-out terminals 21 is completely cut off.

[0223] It should be noted that the movable spring shown in the drawings and described in this specification is only an example of the principles of the present disclosure. It should be clearly understood by those skilled in the art that the principles of the present disclosure are not limited to any details or any components of the devices shown in the drawings or described in the specification.

[0224] In addition, the present disclosure also provides an arc-isolating structure, a contact unit, and a relay with good arc interruption reliability and safety.

[0225] According to a first aspect of the present disclosure, there is provided an arc isolation structure, comprising:

[0226] The first arc-isolating member is mounted on the movable spring piece, and the movable spring piece is used for contacting or separating with a pair of static contact lead-out terminals.

[0227] In some embodiments, the first arc-isolating member is sleeved on the outside of the static contact lead-out end.

[0228] In some embodiments, a first step is provided between the first arc-isolating member and the movable reed to hinder arc transfer; and / or a first gap is provided between the first arc-isolating member and the movable reed to hinder arc transfer.

[0229] In some embodiments, the portion where the movable spring and the pair of static contact terminals contact each other is a first contact portion, and the first step and / or the first gap is provided between inner edges of the first contact portion.

[0230] In some embodiments, the first arc-isolating member includes a column, the top of which faces the static contact lead-out terminal and protrudes from the top surface of the movable spring piece facing the static contact lead-out terminal, so that the first step is formed between the top of the column and the top surface of the movable spring piece.

[0231] In some embodiments, the first gap is arranged along the axial direction of the column.

[0232] In some embodiments, an end of the first gap facing the static contact lead-out end is provided with an open end, and an end of the first gap facing away from the static contact lead-out end is a closed end.

[0233] In some embodiments, a mounting groove is provided on a side wall of the movable spring, the column is at least partially disposed in the mounting groove, and the first gap is disposed between the column and the mounting groove.

[0234] In some embodiments, the mounting slot includes a first mounting portion, the first mounting portion is arranged on the side of the movable spring piece facing the static contact lead-out end, the column is passed through the first mounting portion, and the first gap is arranged between the column and the first mounting portion.

[0235] 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 first arc isolation member.

[0236] In some embodiments, the mounting groove further includes a second mounting portion, which 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 first guide gap is provided between the outer wall of the column and the inner wall of the second mounting portion, the first guide gap being used for guiding the column.

[0237] In some embodiments, the first arc isolation member further includes a limiting portion, which is provided on a side of the column away from the movable spring and can abut against the movable spring for limiting the position of the column.

[0238] In some embodiments, the first arc isolation member further includes an arc isolation ring, which wraps around an end portion of the movable spring along the length direction of the movable spring and at least a portion of a side wall of the movable spring.

[0239] In some embodiments, the first arc isolation member further includes a connecting portion, which is arranged at the bottom of the end of the movable spring away from the static contact lead-out end and is respectively connected to both ends of the arc isolation ring, and the column is arranged on the connecting portion.

[0240] According to the second aspect of the present disclosure, a contact unit of an embodiment of the present disclosure includes a movable spring, a pair of static contact lead-out terminals and the above-mentioned arc isolation structure, wherein the movable spring is used to contact or separate with a pair of static contact lead-out terminals, and the arc isolation structure is arranged on the outside of the movable spring, and the arc isolation structure is used to hinder arc transfer.

[0241] In some embodiments, the side of the movable spring facing the static contact lead-out end is the top surface of the movable spring, and the top surface of the movable spring 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 face each other.

[0242] In some embodiments, the arc isolation portion is a first arc isolation groove; and / or,

[0243] The arc isolation portion is an arc isolation rib.

[0244] In some embodiments, the portion where the movable spring piece contacts the pair of static contact lead ends is a first contact portion, and the arc isolation portion is provided between inner edges of the first contact portions.

[0245] In some embodiments, an anti-short-circuit component is further included. The anti-short-circuit component is arranged at least on the side of the movable spring piece facing the static contact lead-out end, and generates suction when a large fault current occurs in the movable spring piece, so as to resist the electric repulsion between the movable spring piece and the static contact lead-out end.

[0246] According to a third aspect of the present disclosure, a relay according to an embodiment of the present disclosure includes the above-mentioned contact unit.

[0247] One embodiment of the present disclosure has the following advantages or beneficial effects:

[0248] In the arc isolation structure provided by the embodiment of the present disclosure, since arcing is easily generated due to the separation between the static contact lead end and the movable spring piece, the first arc isolation piece is installed on the movable spring piece, closer to the arc starting point, to better hinder the transfer of the arc.

[0249] In a contact unit and a relay provided by the embodiments of the present disclosure, an arc isolation structure is provided on the outside of a movable reed. The arc isolation structure can hinder arc transfer, thereby reducing the risk of arc erosion of the movable reed and achieving protection for the movable reed.

[0250] Example embodiments will be described more fully hereinafter with reference to the accompanying drawings.

[0251] Example 4

[0252] This embodiment provides a contact unit, as shown in Figures 22 and 23, which includes a contact assembly 2, which includes a movable spring 22 and a pair of stationary contact lead-out terminals 21. The movable spring 22 is used to contact or separate from the pair of stationary contact lead-out terminals 21.

[0253] In the contact unit provided in this embodiment, the movable spring 22 contacts or separates with a pair of static contact lead-out terminals 21. When the movable spring 22 contacts the static contacts at the bottom of the pair of static contact lead-out terminals 21, current flows into one static contact lead-out terminal 21, passes through the movable spring 22, and flows out from the other static contact lead-out terminal 21, thereby connecting the load.

[0254] When the movable spring 22 and the static contacts at the bottom of a pair of static contact lead-out terminals 21 separate, as the movable and static contacts between the movable spring 22 and the static contact lead-out terminals 21 separate and the arc is drawn by magnetic blowing, the arc is stretched to a certain extent and the arc is automatically disconnected; if the arc is not stable enough, the arc will transfer on the surface of the movable spring 22 or the static contact lead-out terminal 21, which will make it impossible to extinguish the arc mainly along the magnetic blowing arc path, and finally make it impossible to disconnect the arc, or even cause the relay to explode and burn.

[0255] In order to solve this problem, as shown in FIG. 23 to FIG. 26 , the contact unit provided in this embodiment further includes an arc isolation structure, which is arranged outside the movable spring 22 and is used to prevent arc transfer.

[0256] In the contact unit provided in this embodiment, an arc isolation structure is provided on the outside of the movable reed 22 . The arc isolation structure can hinder arc transfer, thereby reducing the risk of arc ablation on the movable reed 22 and protecting the movable reed 22 .

[0257] Specifically, as shown in FIG. 25 to FIG. 31 , the arc isolation structure provided in this embodiment includes a first arc isolation member 7 , which is mounted on the movable spring piece 22 , and is used to prevent arc transfer.

[0258] The arc isolation structure provided in this embodiment is easy to generate an arc due to the separation between the static contact lead-out terminal 21 and the movable spring piece 22. Therefore, the first arc isolation member 7 is installed on the movable spring piece 22. The first arc isolation member 7 is closer to the arc starting point, which better hinders the transfer of the arc.

[0259] A first step 71 is provided between the first arc-isolating member 7 and the movable reed 22 to prevent arc transfer; and / or a first gap 72 is provided between the first arc-isolating member 7 and the movable reed 22 to prevent arc transfer.

[0260] The arc isolation structure provided in this embodiment has a first step 71 and / or a first gap 72 provided at the contact position between the first arc isolation member 7 and the movable spring 22 and along the arc path. This creates a bend in the arc path, dissipating the arc's kinetic energy and effectively preventing the arc from transferring. The arc transfer direction has two directions: first, the first step 71 and / or the first gap 72 prevent the arc from transferring along the movable spring 22 toward the pair of stationary contact leads 21 facing each other, thereby preventing an arc short circuit between the two sets of movable and stationary contacts between the movable spring 22 and the pair of stationary contact leads 21; and second, the first step 71 and / or the first gap 72 prevent the arc from transferring downward along the movable spring 22 away from the stationary contact leads 21, thereby reducing arc erosion of the outer wall of the movable spring 22 and improving the arc extinguishing capability and effect, thereby improving the breaking capability between the movable and stationary contacts corresponding to the movable spring 22 and the stationary contact leads 21.

[0261] In one embodiment, the first arc isolation member 7 is made of insulating material.

[0262] Specifically, the first arc-isolating member 7 can be made of insulating materials such as ceramics, glass, rubber or plastic. The first arc-isolating member 7 made of insulating material has good performance in breaking or cooling the arc, strong arc extinguishing ability and good arc extinguishing effect.

[0263] It is understandable that in some other embodiments, the first arc-isolating member 7 may also be made of metal material.

[0264] In one embodiment, the first arc isolation member 7 is sleeved on the outer wall of the movable spring 22 .

[0265] The first arc-isolating member 7 can also be called an arc-isolating sleeve. The first arc-isolating member 7 is sleeved on the outer wall of the movable spring piece 22 to block the arc on the outer peripheral side of the contact area corresponding to the movable contact of the movable spring piece 22, which can isolate the arc more comprehensively and is conducive to arc extinguishing.

[0266] It can be understood that there are two first arc-isolating members 7 , and the two first arc-isolating members 7 are respectively arranged at both ends of the movable spring piece 22 in the length direction.

[0267] In this way, the two groups of moving and static contacts between the moving spring 22 and the static contact lead-out end 21 correspond to the two first arc-isolating members 7 respectively, so that each group of moving and static contacts can use a corresponding first arc-isolating member 7 to isolate the arc, and double arc extinguishing can be achieved, thereby improving the thoroughness of arc extinguishing.

[0268] In one embodiment, as shown in Figures 25 to 31, the first arc-isolating member 7 includes a column 70, which protrudes from the movable spring piece 22 toward the top surface of the static contact lead-out end 21, so that a first step 71 is formed between the top surface of the column 70 and the top surface of the movable spring piece 22.

[0269] Since the top surface of the column 70 in the first arc-isolating member 7 protrudes from the top surface of the movable spring piece 22, the top of the column 70 and the top surface of the movable spring piece 22 are not coplanar, or the column 70 is not embedded in the top surface of the movable spring piece 22, and a first step 71 is formed between the top of the column 70 and the top surface of the movable spring piece 22. The first 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 movable spring piece 22, and hindering the arc from transferring to the center line of the length direction of the movable spring piece 22, avoiding the arc short circuit generated by the two sets of movable and static contacts between the movable spring piece 22 and the 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 blow-out magnetic field, thereby improving the arc extinguishing capability.

[0270] In one embodiment, as shown in Figures 25 to 31 , a mounting groove 223 is provided on the sidewall of the movable spring 22, the column 70 is at least partially disposed in the mounting groove 223, and a first gap 72 is provided between the column 70 and the mounting groove 223. The first gap 72 is provided along the axial direction of the column 70.

[0271] A mounting groove 223 is provided on the side wall of the movable spring piece 22. The mounting groove 223 not only provides an accommodation 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 first 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 first gap 72, a part of the arc can enter the first gap 72. The first gap 72 provides an accommodation space for the arc and reduces the risk of this part of the arc being transferred along the movable spring piece 22 away from the static contact lead-out terminal 21, thereby improving the arc extinguishing effect.

[0272] In one embodiment, an end of the first gap 72 facing the static contact lead-out terminal 21 is provided with an open end, and an end of the first gap 72 facing away from the static contact lead-out terminal 21 is a closed end.

[0273] The open end of the first gap 72 is used to introduce the arc, and the first gap 72 has a closed end, so that the first gap 72 does not completely penetrate the structure, thereby forming a bend in the arc path.

[0274] In one embodiment, as shown in Figures 25-31, the mounting groove 223 includes a first mounting portion 2231, the first mounting portion 2231 is arranged on the side of the movable spring 22 facing the static contact lead-out end 21, the column 70 is passed through the first mounting portion 2231, and the first gap 72 is arranged between the column 70 and the first mounting portion 2231.

[0275] A first mounting portion 2231 is provided on the side wall of the movable spring 22, facing the static contact lead-out terminal 21. Specifically, the first mounting portion 2231 is located at the upper portion of the side wall of the movable spring 22. A first gap 72 is provided between the first mounting portion 2231 and the column 70. Because the first gap 72 is closer to the contact point between the movable spring 22 and the static contact lead-out terminal 21, a portion of the arc can directly enter the first gap 72.

[0276] 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 first gap 72, a part of the arc can enter the first gap 72, so that a height difference appears on 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.

[0277] In one embodiment, the first gap 72 is a trumpet-shaped structure, and the wide end of the first gap 72 is disposed toward the static contact lead-out terminal 21 .

[0278] In one embodiment, as shown in FIG. 25 to FIG. 31 , the mounting groove 223 further includes a fixing portion 2232 , which is in communication with the first mounting portion 2231 , and the column 70 is snapped onto the fixing portion 2232 for fixing the first arc isolation member 7 .

[0279] Specifically, the column 70 is clamped to 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 first arc isolation member 7 from detaching from the movable spring 22.

[0280] In one embodiment, as shown in Figures 25 to 31, the mounting groove 223 also includes a second mounting portion 2233, which is arranged on the side of the movable spring 22 away from the static contact lead-out end 21. 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 first guide gap 73 is provided between the outer wall of the column 70 and the inner wall of the second mounting portion 2233. The first guide gap 73 is used to guide the column 70.

[0281] The second mounting portion 2233 is disposed on the side of the movable spring 22 away from the static contact lead-out terminal 21, that is, the second mounting portion 2233 is located at the lower portion of the side wall of the movable spring 22. A first guide gap 73 is provided between the first mounting portion 2231 and the column 70. The first guide gap 73 is used to guide the column 70. Since the column 70 needs to be inserted from the bottom of the movable spring 22 into the mounting groove 223 of the movable spring 22 when the first arc-isolating member 7 is installed on the movable spring 22, the first guide gap 73 is provided 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 do not fit together. The first guide gap 73 provides a guide for the column 70, facilitating the installation of the column 70 of the first arc-isolating member 7.

[0282] It can be understood that the first guide gap 73 can be a trumpet-shaped structure, and the large end of the first guide gap 73 is set away from the static contact lead-out end 21. The large end of the first gap 72 provides an entrance for the column 70 to pass through, further improving the convenience of installation of the first arc-isolating member 7.

[0283] In one embodiment, as shown in Figures 25 to 31, there are two columns 70, and two mounting grooves 223 are arranged 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. The two columns 70 are arranged corresponding to the two mounting grooves 223.

[0284] 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 facing each other, and the arc isolation effect is good.

[0285] In one embodiment, as shown in Figures 25 to 31 , the first 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 22 and can abut against the movable spring 22 for limiting the position of the column 70 .

[0286] When the first 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 first arc isolation member 7 , thereby improving the installation accuracy of the first arc isolation member 7 .

[0287] In one embodiment, as shown in FIG. 25 to FIG. 31 , the first arc isolation member 7 further includes an arc isolation ring 75 , which wraps around at least a portion of the side wall of the end portion of the dynamic reed 22 along the length direction of the dynamic reed 22 .

[0288] The arc-isolating ring 75 of the first arc-isolating member 7 wraps around the end of the movable spring 22 and at least a portion of its sidewalls, effectively installing an arc-isolating sleeve around the outer periphery of the contact area between the static contact lead 21 and the movable spring 22. This reduces arc erosion of the outer wall of the movable spring 22 and prevents the arc from migrating downward along the sidewalls of the movable spring 22, thereby facilitating arc extinguishing. Furthermore, the arc-isolating ring 75 is hollow, i.e., it has a central hole, which reduces weight and meets the requirement for lightweight construction.

[0289] In one embodiment, as shown in Figures 25-31, the first arc-isolating member 7 also includes a connecting portion 76, which is arranged at the bottom of the end of the movable spring piece 22 away from the static contact lead-out end 21 and is respectively connected to the two ends of the arc-isolating ring 75, and the column 70 is arranged on the connecting portion 76.

[0290] If the arc isolation ring 75 has an open end, the arc isolation ring 75 has an open structure, and the connecting portions 76 are respectively connected to the two ends of the arc isolation ring 75, so that the first arc isolation member 7 has an integral structure, thereby improving the fixing effect between the first arc isolation member 7 and the movable spring 22. At the same time, the connecting portion 76 is located at the bottom of the movable spring 22 and does not interfere with the contact between the movable spring 22 and the static contact lead 21.

[0291] It should be noted that the relay contact assembly 2 provided in this embodiment can simultaneously include a first arc-isolating member 7, a first step 71, and a first gap 72. The first step 71 and the first gap 72 form a partial arc-isolating structure, which is used to limit the arc or the arc from migrating along the movable spring 22 away from the stationary contact lead 21, and to limit the arc from migrating along the movable spring 22 toward the pair of stationary contact lead 21 facing each other. The first arc-isolating member 7, made of insulating material, has the ability to interrupt or cool the arc, thereby achieving the desired arc extinguishing effect.

[0292] It should be noted that, in some other embodiments, a second arc-isolating member may be provided outside the static contact lead-out terminal 21 to hinder arc transfer and protect the static contact lead-out terminal 21 .

[0293] In one embodiment, as shown in Figure 32, the contact unit provided in this embodiment also includes a contact container 1, the contact container 1 includes an insulating cover 11, the movable spring 22 is movably arranged in the insulating cover 11, and the static contact lead-out end 21 is passed through the insulating cover 11 and is at least partially arranged in the insulating cover 11.

[0294] The insulating cover 11 and the yoke plate are connected by a frame 12, and the insulating cover 11 and the yoke plate enclose a contact chamber. The contact chamber provides an arc-isolating environment for the contact between the movable spring 22 and the static contact terminal 21, ensuring the reliability of the relay during use.

[0295] In one embodiment, as shown in FIG. 33 , the contact portion between the movable spring 22 and the pair of static contact terminals 21 is the first contact portion 220 , and the first step 71 and / or the first gap 72 are disposed between the inner edges of the first contact portion 220 .

[0296] Specifically, the first contact portion 220 is specifically two sets of moving contacts. Since an arc is generated at the contact portion between the moving spring 22 and a pair of static contact lead ends 21, the first step 71 and / or the first gap 72 are set between the inner edges of the first contact portion 220. The first step 71 and / or the first gap 72 can cut off the path of the arc transferring to the side, thereby avoiding the situation where an arc short circuit is generated between the two sets of moving and static contacts.

[0297] In one embodiment, as shown in Figures 33 and 34, the movable spring 22 provided in this embodiment has a side of the movable spring 22 facing the static contact lead-out terminal 21 as the top surface of the movable spring 22, and an arc-isolating portion is provided on the top surface of the movable spring 22. The arc-isolating portion is used to prevent the arc from moving toward the direction in which the pair of static contact lead-out terminals 21 face each other.

[0298] The arc isolation portion is provided on the top surface of the movable spring piece 22 to prevent the arc from transferring along the top surface of the movable spring piece 22, thereby isolating and cutting off the arc transfer path on the top surface of the movable spring piece 22 and preventing the arc from transferring toward the center line of the length direction of the movable spring piece 22, thereby avoiding the arc short circuit generated by the two sets of movable and static contacts between the movable spring piece 22 and the 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 capability.

[0299] In one embodiment, as shown in FIG. 33 and FIG. 34 , the arc isolation portion is disposed between inner edges of the two first contact portions 220 .

[0300] The portion where the movable spring 22 contacts the pair of static contact terminals 21 is the first contact portion 220. The arc isolating portion is provided between the inner edges of the first contact portion 220 to cut off the path of the arc from transferring inwardly of the static contact terminals 21, thereby preventing the arc short circuit generated by the two sets of movable and static contacts between the movable spring 22 and the pair of static contact terminals 21, thereby ensuring efficient and thorough arc extinguishing.

[0301] It should be noted that the inner side specifically refers to the side where the pair of static contact leads 21 face each other (as shown in FIG23 , Q is the direction in which the pair of static contact leads 21 face each other, and M is the centerline of the static contact leads 21), or the side close to the centerline W of the length direction of the movable spring 22 (as shown in FIG33 , L is the length direction of the movable spring 22, and T is the width direction of the movable spring 22). Therefore, the arc isolation portion is provided on the inner side of the first contact portion 220.

[0302] In one embodiment, there are two arc isolation portions, which are arranged corresponding to a pair of static contact lead-out terminals 21 , and the distance between the outer edges of the two arc isolation portions along the length direction of the movable spring piece 22 is less than or equal to the distance between the inner edges of the first contact portion 220 .

[0303] Specifically, since there are two static contact lead-out terminals 21, two arc-isolating portions are provided corresponding to the two static contact lead-out terminals 21 and are provided 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 blocked by the two arc-isolating portions respectively, playing a double arc-isolating role and further improving the arc-isolating effect.

[0304] In one embodiment, as shown in FIG33 , the arc isolation portion is a first arc isolation groove 222 ; as shown in FIG34 , the arc isolation portion is an arc isolation rib 225 . In other embodiments, the movable spring 22 may be provided with both the first arc isolation groove 222 and the arc isolation rib 225 .

[0305] The first arc-isolating portion comprises a first arc-isolating groove 222, a recessed structure provided on the top surface of the movable spring 22. The first arc-isolating portion comprises an arc-isolating rib 225, a protruding structure provided on the top surface of the movable spring 22. These two structures address the problem of rapid arc transfer that can occur with a movable spring 22 having a flat top surface. The first arc-isolating groove 222 and / or arc-isolating rib 225 isolate and cut off the arc transfer path on the top surface of the movable spring 22, hindering the arc from transferring toward the longitudinal centerline of the movable spring 22, and preventing arc short circuits between the two sets of movable and static contacts between the movable spring 22 and the pair of static contact lead terminals 21.

[0306] Specifically, the first arc isolation groove 222 includes a first groove wall and a first groove bottom that are connected to each other. The arc moves to the connection between the first groove wall and the top surface of the movable spring 22 to form a concentrated arc. The height difference between the top surface of the movable spring 22 facing the stationary contact lead-out terminal 21 and the first groove bottom serves to prevent the arc from moving toward the pair of stationary contact lead-out terminals 21 facing each other.

[0307] 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 is a drop in 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 improves the arc extinguishing effect.

[0308] In one embodiment, as shown in FIG. 28 , the first arc isolation groove 222 is a through groove extending along the width direction of the movable reed 22 .

[0309] If the first arc-isolating groove 222 extends along the length of the movable spring 22, the arc may transfer along the portion of the top surface of the movable spring 22 where the first arc-isolating groove 222 is not provided, posing the risk of arc short circuit. To this end, the first arc-isolating groove 222 is configured as a through groove along the width of the movable spring 22. Since the through groove runs through the width of the movable spring 22, after the arc enters the first arc-isolating groove 222, the arc transfer path toward the pair of stationary contact lead terminals 21 is completely cut off.

[0310] 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 .

[0311] 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 arc-shaped first arc-isolating groove 222 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 blocking the transfer path of the arc in all directions.

[0312] 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 portion where the first arc-isolating groove 22 is not provided, and the contact portion is used to contact the static contact lead-out end 21.

[0313] It should be noted that the first arc isolation groove 222 can be replaced by an arc isolation rib 225. The location and shape of the arc isolation rib 225 are similar to those of the first arc isolation groove 222 and therefore will not be described in detail.

[0314] This embodiment further provides a relay, comprising the above-mentioned contact unit.

[0315] In the relay provided in this embodiment, the movable spring 22 of the contact unit contacts or separates with a pair of static contact lead-out terminals 21. When the movable spring 22 contacts the static contacts at the bottom of the pair of static contact lead-out terminals 21, current flows into one static contact lead-out terminal 21, passes through the movable spring 22, and flows out from the other static contact lead-out terminal 21, thereby connecting the load.

[0316] In one embodiment, as shown in Figures 35 to 37, the relay further includes a pushing assembly 4, which includes a push rod unit 41, an elastic member 43, and a U-shaped bracket 42. 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 movable 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 movable spring 22. The elastic member 43 can provide elastic force, so that the movable spring 22 has a tendency to move away from the base 413 and closer to the static contact lead-out terminal 21.

[0317] Specifically, the push rod unit 41 and the U-shaped bracket 42 cooperate through the limiting protrusion 412 and the limiting hole 421, 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.

[0318] The relay's driving assembly 4 also includes an electromagnet unit 44 (as shown in Figures 23-24). The electromagnet unit 44 is disposed on the side of the yoke plate facing away from the insulating cover 11. A push rod unit 41 is drivingly connected to the electromagnet unit 44. The push rod unit 41 is movably disposed within the driving chamber enclosed by the metal cover and the yoke plate, and passes through a through hole in the yoke plate to abut against the movable spring 22. When the electromagnet unit 44 is energized, it can drive the push rod unit 41 to move, thereby driving the movable spring 22 to contact or separate from the static contact lead 21.

[0319] The electromagnet unit 44 includes a coil frame 441, a coil 442, a static iron core 444, a movable iron core 443, a U-shaped yoke 445, a magnetic tube 446, and a spring 447. The coil frame 441 is arranged in the U-shaped yoke 445. The coil frame 441 is hollow and cylindrical and is made of insulating material. The magnetic tube 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, which is arranged corresponding to the through-hole of the yoke plate for the push rod unit 41 to pass through. The movable iron core 443 is movably arranged in the magnetic tube 446 and is arranged opposite to the static iron core 444. The spring 447 is arranged between the static iron core 444 and the movable iron core 443 and can abut against them respectively. The movable 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.

[0320] The working process of the relay provided in this embodiment is as follows:

[0321] 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. The spring 447 between the static iron core 444 and the moving iron core 443 is compressed, and the push rod unit 41 pushes the moving spring 22 to move through the U-shaped bracket 42 and the elastic member 43, so that the two ends of the moving spring 22 are respectively in contact with the two static contact lead-out ends 21, and the moving and static contacts are closed.

[0322] 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, and the moving and static contacts are separated.

[0323] When the short-circuit load is large, under the action of the short-circuit current, an electrodynamic repulsive force will be generated between the movable spring 22 and the static contact lead-out terminal 21, causing the contacts to spring open, resulting in arcing between the contacts and violent combustion, and even possible explosion.

[0324] To this end, the relay provided in this embodiment also includes an anti-short-circuit component 3 (as shown in Figures 23-24), which is arranged on at least the upper side of the movable spring 22 along the axial direction of the static contact lead-out end 21, and generates suction when a large fault current occurs in the movable spring 22, which is used to resist the electric repulsion between the movable spring 22 and the static contact lead-out end 21.

[0325] Among them, the anti-short-circuit component 3 can also be 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 7 can prevent the arc from being attracted by the anti-short-circuit component 3 and causing the arc to be attracted along the direction in which the pair of static contact lead-out terminals 21 face each other, thereby preventing the insulation between the contacts from decreasing or the arc short-circuiting.

[0326] Specifically, the thrust portion 221 of the movable spring 22 is arranged between the two contact portions, and the anti-short-circuit component 3 is arranged on the thrust portion 221 of the movable spring 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 movable spring 22 and the static contact lead-out terminal 21.

[0327] In one embodiment, the anti-short-circuit assembly 3 includes an upper magnetic conductor 31 and a lower magnetic conductor 32. The upper magnetic conductor 31 is disposed on the side of the movable spring 22 closer to the static contact lead 21. The lower magnetic conductor 32 is at least partially disposed on the side of the movable spring 22 farther from the static contact lead 21, thereby forming 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.

[0328] 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 22. 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 22 toward the direction close to the static contact lead-out end 21. When a large fault current occurs in the movable reed 22, since the upper magnetic conductor 31 is located above the movable reed 22 and the lower magnetic conductor 32 is located below the movable reed 22, the movable reed 22 is sandwiched between the upper magnetic conductor 31 and the lower magnetic conductor 32. When the upper magnetic conductor 31 generates an attractive force on the lower magnetic conductor 32, the attractive force attracts and pulls the movable reed 22 and is used to resist the electromotive force generated by the fault current between the movable reed 22 and the static contact lead-out terminal 21, thereby preventing the movable reed 22 and the static contact lead-out terminal 21 from being separated from each other and causing arcing and explosion, thereby ensuring the reliability and safety of the contact between the movable reed 22 and the static contact lead-out terminal 21.

[0329] In one embodiment, the upper magnet 31 can be a straight-line structure, positioned between the two contact portions of the movable spring 22. The upper magnet 31 can extend along the width of the movable spring 22, ensuring that the upper magnet 31 and the lower magnet 32 ​​are aligned. The lower magnet 32 ​​can be a U-shaped structure, with its opening facing the movable spring 22. The lower magnet 32 ​​has two side arms extending toward the upper magnet 31, allowing the two side arms of the lower magnet 32 ​​to approach or contact the ends of the upper magnet 31, thereby forming a surrounding magnetic ring along the width of the movable spring 22. Since the contact portions at both ends of the movable spring 22 along its length are movable contacts, the surrounding magnetic conductive ring formed along the width direction of the movable spring 22 will not interfere. When a large fault current occurs in the movable spring 22, an electromagnetic attraction force is generated in the pressure direction of the movable contact to resist the electromotive force generated by the fault current between the movable spring 22 and the static contact lead-out terminal 21.

[0330] It should be 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.

[0331] In one embodiment, as shown in FIG32 , the relay further includes an arc extinguishing unit 5 disposed within a hollow chamber of the housing for extinguishing the arc in the contact assembly 2 . The arc extinguishing unit 5 includes two arc extinguishing magnets 51 . The arc extinguishing magnets 51 may be permanent magnets, and each arc extinguishing magnet 51 may be substantially rectangular. The two arc extinguishing magnets 51 are disposed on either side of the insulating cover 11 and are arranged relative to each other along the length of the movable reed 22 .

[0332] In this embodiment, two arc-extinguishing magnets 51 are located on the left and right sides of the insulating cover 11, respectively. The polarity of the facing surfaces of the two arc-extinguishing magnets 51 is opposite. In other words, the arc-extinguishing magnet 51 located on the left side of the insulating cover 11 has an S pole on its left side and an N pole on its right side, while the arc-extinguishing magnet 51 located on the right side of the insulating cover 11 has an S pole on its left side and an N pole on its right side.

[0333] 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 left side of the arc-extinguishing magnet 51 located on the left side of the insulating cover 11 is the S pole and the right side is the N pole, and the left side of the arc-extinguishing magnet 51 located on the right side of the insulating cover 11 is the N pole and the right side is the S pole.

[0334] 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 .

[0335] Therefore, the arc generated between the static contact lead-out terminal 21 and the movable spring piece 22 will be stretched in a direction away from each other by the action of the magnetic field, thereby achieving arc extinguishing.

[0336] The arc extinguishing unit 5 also includes two yoke clamps 52, which are arranged corresponding to the positions of the two arc extinguishing magnets 51. In addition, the two yoke clamps 52 surround the insulating cover 11 and the two arc extinguishing magnets 51. The design of the yoke clamps 52 surrounding the arc extinguishing magnets 51 can prevent the magnetic field generated by the arc extinguishing magnets 51 from spreading outward and affecting the arc extinguishing effect. The yoke clamps 52 are made of soft magnetic material. Soft magnetic materials can include but are not limited to iron, cobalt, nickel and their alloys.

[0337] Example 5

[0338] This embodiment is similar to the fourth embodiment, and the only difference is the structure of the first arc isolation groove 222 .

[0339] As shown in FIG. 38 to FIG. 40 , 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.

[0340] Specifically, as shown in Figure 38, the first arc isolation groove 222 is a linear structure with a simple structure and easy production and processing. Moreover, since the groove width of the first arc isolation groove 222 along the length direction of the dynamic spring piece 22 is relatively narrow, the overall structural strength of the dynamic spring piece 22 is relatively large.

[0341] As shown in FIG39 , the first arc isolation groove 222 is a convex structure, so that the first arc isolation groove 222 is a zigzag groove structure, which increases the tortuosity of the arc transfer path, thereby improving the arc extinguishing effect.

[0342] As shown in FIG40 , 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 a good isolation and arc extinguishing effect.

[0343] It is understandable that the shapes of the two first arc isolation grooves 222 in this embodiment may be the same or different. For example, one of the first arc isolation grooves 222 may be a convex structure, and the other may be a linear structure.

[0344] It is understandable 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 may also be an S-shaped structure, a conical structure, etc., and its specific shape can be adjusted according to actual production conditions.

[0345] It should be noted that, as shown in Figures 41 to 43, the first arc isolation groove 222 can be replaced by an arc isolation rib 225. The setting 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.

[0346] Example 6

[0347] This embodiment is similar to the fourth embodiment, and the only difference is the number and structure of the arc isolation structures.

[0348] As shown in Figures 44 and 45, the number of arc isolation parts provided in this embodiment is one, and the portion of the movable spring piece 22 not provided with the arc isolation part and the portions on both sides along the length direction of the movable spring piece 22 respectively contact a pair of static contact lead-out ends 21.

[0349] When the arc isolation portion is specifically a first arc isolation groove 222, since a first arc isolation groove 222 is arranged between a pair of static contact lead-out ends 21, the groove width of the first arc isolation groove 222 along the length direction of the movable spring piece 22 is relatively wide, and the portion of the movable spring piece 22 that is not provided with the first arc isolation groove 222 and the portion 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 contact with a pair of static contact lead-out ends 21. The arc isolation process from two groups of movable and static contacts can be realized by utilizing a first arc isolation groove 22, the structure is simple, and the production cost is relatively low.

[0350] In one embodiment, the distance between the two side edges of the first arc isolation groove 222 along the length direction of the movable spring 22 is less than or equal to the distance between the bottoms of the pair of static contact lead-out terminals 21 .

[0351] Specifically, the groove width of the first arc isolation groove 222 along the length direction of the movable spring piece 22 extends to near 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, and 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.

[0352] It should be noted that, as shown in FIG45 , the first arc-isolating groove 222 can be replaced by an arc-isolating rib 225 . The location and shape of the arc-isolating rib 225 are similar to those of the first arc-isolating groove 222 and therefore will not be described in detail.

[0353] Example 6

[0354] This embodiment is similar to the fourth embodiment and the fifth embodiment, except that other detailed structures of the movable spring 22 are added on the basis of the fourth embodiment or the fifth embodiment.

[0355] The movable spring piece 22 provided in this embodiment may further be provided with a second arc isolation groove (not shown) 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 ends 21 face each other.

[0356] The movable spring 22 provided in this embodiment has a second arc isolation groove provided on the side wall of the movable spring 22, which prevents the arc from transferring along the side wall of the movable spring 22 toward the center line of the movable spring 22 in the longitudinal direction, thereby isolating and cutting off the transfer path of the arc along the side wall of the movable spring 22, thereby avoiding the arc short circuit caused by the two sets of movable and static contacts between the movable spring 22 and the pair of static contact lead-out terminals 21. The arc can be efficiently extinguished along the originally set arc extinguishing path of the magnetic blowing magnetic field, thereby improving the arc extinguishing capability.

[0357] In one embodiment, the second arc isolation groove is disposed between inner edges of the two first contact portions 220 .

[0358] 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 sets of moving and static contacts between the moving spring 22 and a pair of static contact lead-out terminals 21, so as to ensure the high efficiency and thoroughness of arc extinguishing.

[0359] 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 22 along the length direction of the movable reed 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 22 along the width direction of the movable reed 22.

[0360] For example, the number of the second arc isolation grooves is four, with two second arc isolation grooves on each side of the movable spring piece 22 in the length direction, and two second arc isolation grooves on each side of the movable spring piece 22 in the 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.

[0361] In one embodiment, the second arc isolation groove includes a second groove wall and a second groove bottom 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 prevent the arc from moving toward the direction in which a pair of static contact lead-out ends 21 face each other.

[0362] Since the second arc isolation 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 a drop in the arc transfer path along the side wall of the movable spring piece 22. This drop makes it difficult for the arc to move toward the center line of the movable spring piece 22 in the longitudinal direction. The combination of the edge and the drop improves the arc extinguishing effect.

[0363] In one embodiment, the second arc isolation groove is a through groove along the axial direction of the static contact lead-out end 21 .

[0364] If the second arc-isolating groove extends along the length of the movable spring 22, the arc could migrate along the sidewall of the movable spring 22 where the second arc-isolating groove is not provided, posing the risk of arc short circuit. To address this issue, the second arc-isolating groove is provided as a through groove along the axial direction of the stationary contact lead-out terminal 21. Since the through groove extends through the height of the movable spring 22, once the arc enters the second arc-isolating groove, the arc's migration path toward the facing direction of the pair of stationary contact lead-out terminals 21 is completely cut off.

[0365] In addition, the present disclosure also provides a relay contact assembly and a relay with good arc interruption reliability and safety.

[0366] According to a first aspect of the present disclosure, there is provided a relay contact assembly, comprising:

[0367] A pair of static contact terminals;

[0368] The moving reed is used to contact or separate with a pair of static contact terminals;

[0369] A first arc-isolating member is provided outside the static contact lead-out end and is used to prevent arc transfer;

[0370] The second arc-isolating member is installed on the movable spring piece and is used to prevent the arc from transferring.

[0371] In some embodiments, the first arc-isolating member is sleeved on the outside of the static contact lead-out end; and / or,

[0372] The second arc isolation member is sleeved on the outer wall of the movable spring.

[0373] 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.

[0374] 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 and the outer peripheral wall of the static contact lead-out end corresponding thereto.

[0375] In some embodiments, the first gap is provided 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.

[0376] In some embodiments, 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 snapped into the positioning matching portion.

[0377] In some embodiments, a static contact is provided at the bottom of the static contact lead-out end, and an outer peripheral wall of the first arc-isolating member protrudes from an outer peripheral wall of the static contact;

[0378] Wherein, the static contact lead-out terminal and the static contact are an integrally formed structure or a split structure.

[0379] 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.

[0380] In some embodiments, the first gap is provided 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.

[0381] In some embodiments, the portion where the movable spring contacts the pair of static contact leads is a first contact portion, and at least part of the first step and / or the first gap is disposed between inner edges of the first contact portion. In some embodiments, a second step is disposed between the second arc-isolating member and the movable spring to prevent arc transfer; and / or

[0382] A second gap is provided between the second arc-isolating member and the movable spring piece for preventing arc transfer.

[0383] In some embodiments, the portion where the movable spring and the pair of static contact lead terminals contact each other is a first contact portion, and the second step and / or the second gap is provided between inner edges of the first contact portion.

[0384] In some embodiments, the second arc-isolating member includes a column, the top of which faces the static contact lead-out terminal and protrudes from the top surface of the movable spring piece facing 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.

[0385] In some embodiments, a mounting groove is provided on a 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.

[0386] In some embodiments, the second gap is arranged along the axial direction of the column.

[0387] In some embodiments, an end of the second gap facing the static contact lead-out terminal is provided with an open end, and an end of the second gap facing away from the static contact lead-out terminal is provided with a closed end.

[0388] In some embodiments, the mounting groove includes a first mounting portion, the first mounting portion is arranged on the side of the movable spring piece facing the static contact lead-out end, the column is passed through the first mounting portion, and the second gap is arranged between the column and the first mounting portion.

[0389] In some embodiments, the second gap is a trumpet-shaped structure, and the wide end of the second gap is arranged toward the static contact lead-out end.

[0390] 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.

[0391] In some embodiments, the mounting groove further includes a second mounting portion, which 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.

[0392] 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.

[0393] In some embodiments, the second arc-isolating member further includes a limiting portion, which is provided on a side of the column away from the movable spring and can abut against the movable spring for limiting the position of the column.

[0394] In some embodiments, the second arc isolation member further includes an arc isolation ring, which wraps around the end of the movable spring along the length direction of the movable spring and at least a portion of the side wall of the movable spring to prevent arc transfer.

[0395] In some embodiments, the second arc isolation member further includes a connecting portion, which is arranged at the bottom of the end of the movable spring away from the static contact lead-out end and is respectively connected to both ends of the arc isolation ring, and the column is arranged on the connecting portion.

[0396] 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.

[0397] In some embodiments, the first arc-isolating member and the second arc-isolating member are both made of insulating material.

[0398] 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 facing the static contact lead-out end and toward the direction in which the pair of static contact lead-out ends face each other.

[0399] In some embodiments, the arc isolation portion is a first arc isolation groove; and / or,

[0400] The arc isolation portion is an arc isolation rib.

[0401] In some embodiments, the portion where the movable spring piece contacts the pair of static contact lead ends is a first contact portion, and the arc isolation portion is provided between inner edges of the first contact portions.

[0402] According to a second aspect of the present disclosure, a relay according to an embodiment of the present disclosure includes the above-mentioned relay contact assembly.

[0403] In some embodiments, the relay further includes an anti-short-circuit component, which is arranged at least on the side of the movable reed facing the static contact lead-out end, and generates suction when a large fault current occurs in the movable reed, to resist the electromotive repulsive force between the movable reed and the static contact lead-out end.

[0404] One embodiment of the present disclosure has the following advantages or beneficial effects:

[0405] The relay contact assembly and relay provided by the embodiments of the present disclosure have a movable spring that contacts or separates from a pair of static contact leads. When the movable spring contacts the static contacts at the bottom of the pair of static contact leads, current flows into one static contact lead and flows out from the other static contact lead after passing through the movable spring, thereby connecting the load. When the movable spring separates from the static contacts at the bottom of the pair of static contact leads, the contacts are disconnected under 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 under the action of the magnetic field, a first arc-isolating member is provided on the outer wall of the static contact lead to block the transfer of the arc and reduce the arc erosion of the peripheral side wall of the static contact lead. At the same time, a second arc-isolating member is installed on the movable spring, and the first arc-isolating member is closer to the arc starting point, which better hinders the transfer of the arc. This can further prevent the arc from being attracted by the short-circuit ring and thus the arc from being attracted toward each other between the contacts, thereby preventing the insulation between the contacts from decreasing or the arc short-circuiting.

[0406] Under the joint action of the first arc isolation member and the second arc isolation member, the transfer range of the arc is limited to between the movable 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.

[0407] Example embodiments will be described more fully hereinafter with reference to the accompanying drawings.

[0408] Example 7

[0409] This embodiment provides a relay contact assembly 2, as shown in Figures 46 to 48. The relay contact assembly 2 includes a movable spring 22 and a pair of stationary contact lead-out terminals 21. The movable spring 22 is used to contact or separate from the pair of stationary contact lead-out terminals 21.

[0410] In the relay contact assembly 2 provided in this embodiment, the movable spring 22 contacts or separates with a pair of stationary contact leads 21. When the movable spring 22 contacts the stationary contacts at the bottom of the pair of stationary contact leads 21, current flows into one stationary contact lead 21, passes through the movable spring 22, and flows out from the other stationary contact lead 21, thereby connecting the load.

[0411] In one embodiment, a static contact is provided 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.

[0412] 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 provided at the bottom of the static contact lead-out terminal 21 .

[0413] When the movable spring 22 and the static contacts at the bottom of the pair of static contact lead-out terminals 21 are separated, as the movable and static contacts between the movable spring 22 and the static contact lead-out terminals 21 are separated and the arc is drawn by magnetic blowing, the arc is stretched to a certain extent and the arc is automatically disconnected; if the arc is not stable enough at the movable and static contacts, the arc will transfer on the surface of the movable spring 22 or the static contact, which will result in the arc not being extinguished mainly along the magnetic blowing arc path, and finally the arc cannot be disconnected, and even the relay will explode and burn.

[0414] To address this issue, as shown in Figures 46-48 , the relay contact assembly 2 provided in this embodiment further includes a first arc-isolating member 6 and a second arc-isolating member 8. The first arc-isolating member 6 is disposed outside the static contact lead-out terminal 21 to prevent arc transfer. The second arc-isolating member 8 is mounted on the movable reed 22 to prevent arc transfer.

[0415] In the relay contact assembly 2 provided in this embodiment, when an arc moves up and down along the outer wall of the static contact lead 21 under the influence of a magnetic field, the first arc-isolating member 6 disposed outside the static contact lead 21 reduces the risk of arc erosion of the surrounding sidewall of the static contact lead 21. The second arc-isolating member 8 is mounted on the movable spring 22, with the first arc-isolating member 6 closer to the arc starting point, thereby better preventing arc transfer.

[0416] In one embodiment, the first arc isolation member 6 is made of insulating material.

[0417] 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 material has good arc-breaking or arc-cooling performance, strong arc-extinguishing ability and good arc-extinguishing effect.

[0418] It is understandable that in some other embodiments, the first arc-isolating member 6 may also be made of metal material.

[0419] In one embodiment, as shown in FIG. 49-FIG . 50 , the first arc-isolating member 6 is located inside the insulating cover 11 and is sleeved on the outside of the static contact lead-out terminal 21 .

[0420] The first arc-isolating member 6 can also be an arc-isolating sleeve, which is sleeved on the outside of the static contact lead-out terminal 21 to perform arc isolation 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.

[0421] It should be noted 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 cylindrical, elliptical, square, and polygonal shapes.

[0422] 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.

[0423] In addition, the first arc-isolating member 6 can be an integrated structure. For example, the first arc-isolating member 6 is an integrated cylindrical or ring-shaped member that is sleeved on the outside of the static contact lead-out end 21. The integrated molding structure reduces the number of parts assembly steps and has a relatively low production cost.

[0424] Specifically, the first arc-isolating member 6 can also be a split structure, comprising a plurality of insulating units, which are arranged circumferentially along the static contact lead-out terminal 21 and can be joined end-to-end to form a cylindrical, polygonal, or other cylindrical structure. In other embodiments, the plurality of insulating units can be arranged annularly and spaced apart around the outside of the static contact lead-out terminal 21, or a single insulating unit can be arranged outside the static contact lead-out terminal 21. This embodiment is not limited thereto as long as both insulation and arc extinguishing effects are achieved.

[0425] In one embodiment, as shown in Figures 50-52, 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 end 21 to prevent the arc from transferring along the outer wall of the static contact lead-out end 21 and in a direction away from the movable reed 22.

[0426] 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, i.e., a bend is formed in the arc path, which can dissipate the kinetic energy of the arc and better prevent the transfer of the arc. The arc transfer direction has two directions: first, the first step 61 and / or the first gap 60 can prevent the arc from transferring in the direction where the pair of static contact lead-out terminals 21 face each other, thereby preventing the two sets of moving and static contacts between the moving spring 22 and the pair of static contact lead-out terminals 21 from generating an arc short circuit; second, the first step 61 and / or the first gap 60 can prevent the arc from transferring upward along the outer wall of the static contact lead-out terminal 21 in a direction away from the moving spring 22, thereby reducing the arc erosion of the outer wall of the static contact lead-out terminal 21, and at the same time improving the arc extinguishing ability and effect, thereby improving the breaking ability between the moving contact and the static contact corresponding to the moving spring 22 and the static contact lead-out terminal 21.

[0427] In one embodiment, as shown in Figure 52, the outer peripheral wall of the first arc-isolating 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-isolating member 6 and the outer peripheral wall of the static contact lead-out terminal 21 corresponding thereto.

[0428] The outer peripheral wall of the first arc-isolating member 6 and the outer peripheral wall of the static contact lead-out terminal 21, or the first arc-isolating member 6 is not embedded in the outer peripheral wall of the static contact lead-out terminal 21, then 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 dynamic reed 22, so as to achieve the purpose of losing arc energy.

[0429] The outer peripheral wall of the first arc-isolating member 6 protrudes from the outer peripheral wall of the static contact.

[0430] 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 end 21 and in the direction away from the dynamic spring piece 22, thereby achieving protection of the static contact lead-out end 21.

[0431] In one embodiment, as shown in FIG52 , a first gap 60 is provided between the inner wall of the bottom of the first arc-isolating 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-isolating member 6 and the outer peripheral wall of the bottom of the static contact lead-out terminal 21.

[0432] 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, so that a height difference appears on 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.

[0433] In one embodiment, an end of the first gap 60 facing the movable reed 22 is provided with an open end, and an end of the first gap 60 away from the movable reed 22 is provided with a closed end.

[0434] 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.

[0435] It should be 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, which is used to limit the arc from transferring along the static contact lead-out end 21 and in a direction away from the movable spring piece 22 and can limit the arc from transferring in the direction of the center line of the movable spring 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.

[0436] In one embodiment, as shown in Figure 52, 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.

[0437] When the first arc-isolating member 6 is installed on the static contact lead-out terminal 21, the positioning portion 62 and the positioning and fitting portion 211 can initially position the first arc-isolating member 6, thereby improving the installation accuracy of the first arc-isolating member 6. At the same time, the positioning portion 62 is engaged with the positioning and fitting portion 211 to secure the first arc-isolating member 6 and prevent it from falling.

[0438] The positioning portion 62 and the positioning mating portion 211 can be stop steps, annular positioning grooves, or positioning protrusions provided on the static contact lead terminal 21. For example, the positioning portion 62 can be an annular clamping block provided on the inner wall of the first arc-isolating member 6, and the positioning mating portion 211 can be an annular clamping groove provided on the outer wall of the static contact lead terminal 21, with the annular clamping block engaging the annular clamping groove. The positioning portion 62 and the positioning mating portion 211 provided in this embodiment are not limited to other forms. Any form that can achieve positioning and fixing of the first arc-isolating member 6 relative to the static contact lead terminal 21 is within the scope of protection of this embodiment.

[0439] In one embodiment, as shown in Figure 52, a first guide gap 63 is provided between the top inner wall of the first arc-isolating member 6 away from the end of the movable spring 22 and the outer wall of the corresponding static contact lead-out end 21. The first guide gap 63 is used to guide the static contact lead-out end 21.

[0440] Since when the first arc-isolating member 6 is installed on the static contact lead-out terminal 21, the first arc-isolating member 6 needs to be sleeved 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 reason, 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, thereby facilitating the installation of the first arc-isolating member 6.

[0441] 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 dynamic spring 22. The large end of the first gap 60 provides an entrance for the bottom of the static contact lead-out end 21 to pass through, further improving the convenience of installation of the first arc-isolating member 6.

[0442] In one embodiment, as shown in FIG53 , the second arc-isolating member 8 is made of insulating material.

[0443] Specifically, the second arc-isolating member 8 can be made of insulating materials such as ceramics, glass, rubber or plastic. The second arc-isolating member 8 made of insulating materials has good arc-breaking or arc-cooling performance, strong arc-extinguishing ability and good arc-extinguishing effect.

[0444] It is understandable that in some other embodiments, the second arc-isolating member 8 may also be made of metal material.

[0445] In one embodiment, the second arc-isolating member 8 is sleeved on the outer wall of the movable spring 22 .

[0446] The second arc-isolating member 8 can also be an arc-isolating sleeve. The second arc-isolating member 8 is sleeved on the outer wall of the movable spring piece 22 to perform arc isolation treatment on the outer peripheral side of the contact area corresponding to the movable contact of the movable spring piece 22, which can isolate the arc more comprehensively and is conducive to arc extinguishing.

[0447] It can be understood that there are two second arc-isolating members 8 , and the two second arc-isolating members 8 are respectively provided at both ends of the movable spring piece 22 along the length direction of the movable spring piece 22 .

[0448] In this way, the two groups of moving and static contacts between the moving spring 22 and the static contact lead-out end 21 correspond to the two second arc-isolating members 8 respectively, so that each group of moving and static contacts can use a corresponding second arc-isolating member 8 to isolate the arc, and double arc extinguishing can be achieved, thereby improving the thoroughness of arc extinguishing.

[0449] In one embodiment, as shown in Figures 53-59, a second step 81 is provided between the second arc isolation member 8 and the movable reed 22 to hinder arc transfer; and / or a second gap 82 is provided between the second arc isolation member 8 and the movable reed 22 to hinder transfer.

[0450] A second step 81 and / or a second gap 82 are provided at the contact position between the second arc-isolating member 8 and the movable spring 22 and on the path of the arc movement, i.e., a bend is formed in the arc path, which can dissipate the kinetic energy of the arc and better prevent the transfer of the arc. The arc transfer direction has two directions: first, the second step 81 and / or the second gap 82 can prevent the arc from transferring in the direction where the pair of static contact lead-out terminals 21 face each other, thereby preventing the two sets of movable and static contacts between the movable spring 22 and the pair of static contact lead-out terminals 21 from generating an arc short circuit; second, the second step 81 and / or the second gap 82 can prevent the arc from transferring downward along the movable spring 22 away from the static contact lead-out terminals 21, thereby reducing the arc erosion on the outer wall of the movable spring 22 and improving the arc extinguishing ability and effect, thereby improving the breaking ability between the movable contact and the static contact corresponding to the movable spring 22 and the static contact lead-out terminals 21.

[0451] In one embodiment, the contact portions between the movable spring 22 and the pair of static contact terminals 21 are two first contact portions 220 , and the second step 81 and / or the second gap 82 are provided between the inner edges of the two first contact portions 220 .

[0452] Specifically, the first contact portion 220 is specifically two groups of moving contacts, and an arc is generated at the contact portion between the moving spring 22 and a pair of the static contact lead ends 21. The second step 81 and / or the second gap 82 are set between the inner edges of the two first contact portions 220. The second step 81 and / or the second gap 82 can cut off the path of the arc transferring to the inside, thereby avoiding the situation where an arc short circuit occurs between the two groups of moving and static contacts.

[0453] In one embodiment, as shown in Figures 53 to 59, the second arc-isolating member 8 includes a column 70, and the top surface of the column 70 facing the static contact lead-out terminal 21 protrudes from the top surface of the movable spring piece 22 facing the static contact lead-out terminal 21, so that a second step 81 is formed between the top surface of the column 70 and the top surface of the movable spring piece 22.

[0454] Since the top surface of the column 70 in the second arc-isolating member 8 protrudes from the top surface of the movable spring piece 22, the top of the column 70 and the top surface of the movable spring piece 22 are not coplanar, or the column 70 is not embedded in the top surface of the movable spring piece 22, and a second step 81 is formed between the top of the column 70 and the top surface of the movable spring piece 22. The second step 81 is closer to the arc starting point, thereby isolating and cutting off the transfer path of the arc on the top surface of the movable spring piece 22, and hindering the arc from transferring to the center line of the length direction of the movable spring piece 22, avoiding the arc short circuit generated by the two sets of movable and static contacts between the movable spring piece 22 and the 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 capability.

[0455] In one embodiment, a mounting groove 223 is provided on the side wall of the movable spring 22 , the column 70 is at least partially disposed in the mounting groove 223 , and the second gap 82 is disposed between the column 70 and the mounting groove 223 .

[0456] A mounting groove 223 is provided on the side wall of the movable spring piece 22. The mounting groove 223 not only provides an accommodation 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 82 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 82, a portion of the arc can enter the second gap 82. The second gap 82 provides an accommodation space for the arc and reduces the risk of this portion of the arc being transferred along the movable spring piece 22 away from the static contact lead-out terminal 21, thereby improving the arc extinguishing effect.

[0457] In one embodiment, an end of the second gap 82 facing the static contact lead-out terminal 21 is provided with an open end, and an end of the second gap 82 facing away from the static contact lead-out terminal 21 is a closed end.

[0458] The open end of the second gap 82 is used to introduce the arc, and the second gap 82 has a closed end, so that the second gap 82 does not completely penetrate the structure, thereby forming a bend in the arc path.

[0459] In one embodiment, as shown in Figures 53 and 59, the mounting slot 223 includes a first mounting portion 2231, which is disposed on the side of the movable spring 22 facing the static contact lead-out terminal 21. The column 70 passes through the first mounting portion 2231, and a second gap 82 is disposed between the column 70 and the first mounting portion 2231. The second gap 82 is disposed along the axial direction of the column 70.

[0460] A first mounting portion 2231 is provided on the side wall of the movable spring 22, facing the static contact lead-out terminal 21. Specifically, the first mounting portion 2231 is located at the upper portion of the side wall of the movable spring 22. A second gap 82 is provided between the first mounting portion 2231 and the column 70. Because the second gap 82 is closer to the contact point between the movable spring 22 and the static contact lead-out terminal 21, a portion of the arc can directly enter the second gap 82.

[0461] 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 82, a part of the arc can enter the second gap 82, so that a height difference appears on 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.

[0462] In one embodiment, the second gap 82 is a trumpet-shaped structure, and the wide end of the second gap 82 is arranged toward the static contact lead-out terminal 21 .

[0463] In one embodiment, as shown in Figures 53 and 59, the mounting groove 223 further includes a fixing portion 2232, which is communicated with the first mounting portion 2231, and the column 70 is clamped to the fixing portion 2232 for fixing the second arc isolation member 8.

[0464] Specifically, the column 70 is clamped to 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 8 from detaching from the movable spring 22.

[0465] In one embodiment, as shown in Figures 53 and 59, the mounting groove 223 also includes a second mounting portion 2233, which is arranged on the side of the movable spring 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 83 is provided between the outer wall of the column 70 and the inner wall of the second mounting portion 2233. The second guide gap 83 is used to guide the column 70.

[0466] The second mounting portion 2233 is disposed on the side of the movable spring 22 away from the static contact lead-out terminal 21, that is, the second mounting portion 2233 is located at the lower portion of the side wall of the movable spring 22. A second guide gap 83 is provided between the first mounting portion 2231 and the column 70. The second guide gap 83 is used to guide the column 70. Since the column 70 needs to be inserted from the bottom of the movable spring 22 into the mounting groove 223 of the movable spring 22 when the second arc-isolating member 8 is installed on the movable spring 22, a second guide gap 83 is provided 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 do not fit together. The second guide gap 83 provides guidance for the column 70, facilitating the installation of the column 70 of the second arc-isolating member 8.

[0467] It can be understood that the second guide gap 83 can be a trumpet-shaped structure, and the large end of the second guide gap 83 is set away from the static contact lead-out end 21. The large end of the second gap 82 provides an entrance for the column 70 to pass through, further improving the convenience of installation of the second arc-isolating member 8.

[0468] In one embodiment, there are two columns 70 , and two mounting grooves 223 are provided 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 . The two columns 70 are provided correspondingly to the two mounting grooves 223 .

[0469] 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 facing each other, and the arc isolation effect is good.

[0470] In one embodiment, as shown in Figures 53 to 59, the second arc isolation member 8 further includes a limiting portion 74, which is arranged on the side of the column 70 away from the dynamic spring piece 22 and can abut against the dynamic spring piece 22 for limiting the position of the column 70.

[0471] When the second arc isolation member 8 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 8 , thereby improving the installation accuracy of the second arc isolation member 8 .

[0472] In one embodiment, the second arc-isolating member 8 further includes an arc-isolating ring 75 , which wraps around at least a portion of the side wall of the movable reed 22 at an end portion of the movable reed 22 along the length direction of the movable reed 22 .

[0473] The arc-isolating ring 75 of the second arc-isolating member 8 wraps around the end of the movable spring 22 and at least a portion of its sidewalls, effectively installing an arc-isolating sleeve around the outer periphery of the contact area between the static contact lead 21 and the movable spring 22. This reduces arc erosion of the outer wall of the movable spring 22 and prevents the arc from migrating downward along the sidewalls of the movable spring 22, thereby facilitating arc extinguishing. Furthermore, the arc-isolating ring 75 is hollow, with a central hole disposed at its center. This reduces weight, meeting the need for lightweight design.

[0474] In one embodiment, as shown in Figures 53-59, the second arc-isolating member 8 also includes a connecting portion 76, which is arranged at the bottom of the end of the movable spring 22 away from the static contact lead-out end 21 and is respectively connected to the two ends of the arc-isolating ring 75, and the column 70 is arranged on the connecting portion 76.

[0475] If the arc isolation ring 75 has an open end, the arc isolation ring 75 has an open structure, and the connecting portions 76 are respectively connected to the two ends of the arc isolation ring 75, so that the second arc isolation member 8 has an integral structure, thereby improving the fixing effect between the second arc isolation member 8 and the movable spring 22. At the same time, the connecting portion 76 is located at the bottom of the movable spring 22 and does not interfere with the contact between the movable spring 22 and the static contact lead 21.

[0476] It should be noted that the relay contact assembly 2 provided in this embodiment can also include a second arc-isolating member 8, a second step 81, and a second gap 82. The second step 81 and the second gap 82 form a partial arc-isolating structure, which is used to limit the arc or the arc from migrating along the movable spring 22 away from the stationary contact lead 21, and to limit the arc from migrating along the movable spring 22 toward the pair of stationary contact lead 21 facing each other. The second arc-isolating member 8, made of insulating material, has the ability to interrupt or cool the arc, thereby extinguishing the arc.

[0477] It can be understood that the relay contact assembly 2 provided in this embodiment utilizes 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 utilizes the second arc-isolating member 8 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 8, the arc is prevented from transferring in the direction where a pair of static contact lead-out terminals 21 face 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, which can more comprehensively isolate the arc, prevent the transfer of the arc, and improve the arc extinguishing performance.

[0478] This embodiment also provides a relay, including the above-mentioned relay contact assembly 2.

[0479] In the relay provided in this embodiment, the movable spring 22 of the relay contact assembly 2 contacts or separates with a pair of static contact leads 21. When the movable spring 22 contacts the static contacts at the bottom of the pair of static contact leads 21, current flows into one static contact lead 21 and flows out of the other static contact lead 21 after passing through the movable spring 22, thereby connecting the load. The first arc-isolating member 6 can be used to prevent the arc from moving upward along the outer wall of the static contact lead 21, and the second arc-isolating member 8 can be used to prevent the arc from moving downward along the outer wall of the movable spring 22. Under the combined action of the first arc-isolating member 6 and the second arc-isolating member 8, the arc transfer range is limited to between the movable spring 22 and the static contact lead 21, which can more comprehensively isolate the arc, prevent the arc from transferring, and improve the thoroughness of arc extinguishing.

[0480] In one embodiment, as shown in Figures 48 and 60, the relay provided in this embodiment also includes a contact container 1, the contact container 1 includes an insulating cover 11, the movable reed 22 is arranged in the insulating cover 11, and the static contact lead-out terminal 21 is passed through the insulating cover 11 and is at least partially arranged in the insulating cover 11.

[0481] The insulating cover 11 and the yoke plate are connected by a frame 12, and the insulating cover 11 and the yoke plate enclose a contact chamber. The contact chamber provides an arc-isolating environment for the contact between the movable spring 22 and the static contact terminal 21, ensuring the reliability of the relay during use.

[0482] 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.

[0483] In one embodiment, as shown in Figures 61 and 62, the side of the movable spring 22 provided in this embodiment facing the static contact lead-out terminal 21 is the top surface of the movable spring 22, and the top surface of the movable spring 22 is provided with an arc isolation portion, which is used to prevent the arc from moving toward the direction in which a pair of static contact lead-out terminals 21 face each other.

[0484] The arc isolation portion is provided on the top surface of the movable spring piece 22 to prevent the arc from transferring along the top surface of the movable spring piece 22, thereby isolating and cutting off the arc transfer path on the top surface of the movable spring piece 22 and preventing the arc from transferring toward the center line of the length direction of the movable spring piece 22, thereby avoiding the arc short circuit generated by the two sets of movable and static contacts between the movable spring piece 22 and the 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 capability.

[0485] In one embodiment, the arc isolation portion is disposed between inner edges of the two first contact portions 220 .

[0486] The portion where the movable spring 22 contacts the pair of static contact terminals 21 is the first contact portion 220. The arc isolating portion is provided between the inner edges of the first contact portion 220 to cut off the path of the arc from transferring inwardly of the static contact terminals 21, thereby preventing the arc short circuit generated by the two sets of movable and static contacts between the movable spring 22 and the pair of static contact terminals 21, thereby ensuring efficient and thorough arc extinguishing.

[0487] It should be noted that the inner side specifically refers to the side where the pair of static contact leads 21 face each other (as shown in FIG47 , Q is the direction in which the pair of static contact leads 21 face each other), or the side close to the centerline W of the length direction of the movable spring 22 (as shown in FIG61 , L is the length direction of the movable spring 22, and T is the width direction of the movable spring 22). Therefore, the arc-isolating portion is provided on the side of the first contact portion 220 facing inward, or, alternatively, the arc-isolating portion is provided between the centerlines of the two static contact leads 21 (as shown in FIG47 , M is the centerline of the static contact leads 21).

[0488] It can be understood that at least a portion of the first step 61 and / or the first gap 60 is disposed between inner edges of the first contact portion 220 .

[0489] In one embodiment, as shown in FIG. 61-FIG . 62 , the arc-isolating portion is a first arc-isolating groove 222 ; and / or, the arc-isolating portion is an arc-isolating rib 225 .

[0490] The arc-isolating portion, comprising a first arc-isolating groove 222, is a recessed structure provided on the top surface of the movable spring 22. The arc-isolating portion, comprising an arc-isolating rib 225, is a protruding structure provided on the top surface of the movable spring 22. These two structures address the problem of rapid arc transfer that can occur on the top surface of the planar movable spring 22. The first arc-isolating groove 222 and / or arc-isolating rib 225 isolate and cut off the arc transfer path on the top surface of the movable spring 22, hindering arc transfer toward the longitudinal centerline of the movable spring 22, thereby preventing arc short circuits between the two sets of movable and static contacts between the movable spring 22 and the pair of static contact lead terminals 21.

[0491] Specifically, the first arc isolation groove 222 includes a first groove wall and a first groove bottom that are connected to each other. The arc moves to the connection between the first groove wall and the top surface of the movable spring 22 to form a concentrated arc. The height difference between the top surface of the movable spring 22 facing the stationary contact lead-out terminal 21 and the first groove bottom serves to prevent the arc from moving toward the direction in which the pair of stationary contact lead-out terminals 21 face each other.

[0492] 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 is a drop in 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 improves the arc extinguishing effect.

[0493] In one embodiment, as shown in FIG. 61 , the first arc isolation groove 222 is a through groove extending along the width direction of the movable reed 22 .

[0494] If the first arc-isolating groove 222 extends along the length of the movable spring 22, the arc may transfer along the portion of the top surface of the movable spring 22 where the first arc-isolating groove 222 is not provided, posing the risk of arc short circuit. To this end, the first arc-isolating groove 222 is configured as a through groove along the width of the movable spring 22. Since the through groove is provided along the width of the movable spring 22, after the arc enters the first arc-isolating groove 222, the arc transfer path toward the pair of static contact lead ends 21 facing each other is completely cut off.

[0495] In one embodiment, as shown in FIG. 61 and FIG. 62 , 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 the side of the pair of static contact lead-out terminals 21 facing each other.

[0496] 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.

[0497] 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 .

[0498] 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 arc-shaped first arc-isolating groove 222 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 blocking the transfer path of the arc in all directions.

[0499] 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 portion where the first arc-isolating groove 22 is not provided, and the contact portion is used to contact the static contact lead-out end 21.

[0500] It should be noted that, as shown in Figures 61 and 62, the first arc isolation groove 222 can be replaced by an arc isolation rib 225. The setting 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.

[0501] This embodiment also provides a relay, including the above-mentioned relay contact assembly 2.

[0502] 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 leads 21. When the movable spring 22 contacts the stationary contacts at the bottom of the pair of stationary contact leads 21, current flows into one stationary contact lead-out terminal 21, passes through the movable spring 22, and flows out from the other stationary contact lead-out terminal 21, thereby connecting the load.

[0503] In one embodiment, as shown in Figures 60, 63 and 64, the relay further includes a push assembly 4, which includes a push rod unit 41, an elastic member 43 and a U-shaped bracket 42. 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 movable 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 movable spring 22. The elastic member 43 can provide elastic force, so that the movable spring 22 has a tendency to move away from the base 413 and closer to the static contact lead-out terminal 21.

[0504] 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.

[0505] As shown in Figures 60, 63, and 64, the relay's driving assembly 4 also includes an electromagnet unit 44, which is located on the side of the yoke plate facing away from the insulating cover 11. A push rod unit 41 is drivingly connected to the electromagnet unit 44. The push rod unit 41 is movably disposed within the driving chamber enclosed by the metal cover and the yoke plate, and passes through a hole in the yoke plate to abut against the movable spring 22. When the electromagnet unit 44 is energized, it drives the push rod unit 41 to move, thereby moving the movable spring 22 to contact or separate from the static contact terminal 21.

[0506] The electromagnet unit 44 includes a coil frame 441, a coil 442, a static iron core 444, a movable iron core 443, a U-shaped yoke 445, a magnetic tube 446, and a spring 447. The coil frame 441 is arranged in the U-shaped yoke 445. The coil frame 441 is hollow and cylindrical and is made of insulating material. The magnetic tube 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, which is arranged corresponding to the through-hole of the yoke plate for the push rod unit 41 to pass through. The movable iron core 443 is movably arranged in the magnetic tube 446 and is arranged opposite to the static iron core 444. The spring 447 is arranged between the static iron core 444 and the movable iron core 443 and can abut against them respectively. The movable 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.

[0507] The working process of the relay provided in this embodiment is as follows:

[0508] 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. The spring 447 between the static iron core 444 and the moving iron core 443 is compressed, and the push rod unit 41 pushes the moving spring 22 to move through the U-shaped bracket 42 and the elastic member 43, so that the two ends of the moving spring 22 are respectively in contact with the two static contact lead-out ends 21, and the moving and static contacts are closed.

[0509] 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, and the moving and static contacts are separated.

[0510] In one embodiment, as shown in Figures 60, 63, and 64, the relay further includes an arc extinguishing unit 5 disposed within a hollow chamber of the housing for extinguishing the arc in 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 substantially rectangular. The two arc extinguishing magnets 51 are disposed on either side of the insulating cover 11 and are arranged relative to each other along the length of the movable spring 22.

[0511] In this embodiment, two arc-extinguishing magnets 51 are located on the left and right sides of the insulating cover 11, respectively. The polarity of the facing surfaces of the two arc-extinguishing magnets 51 is opposite. In other words, the arc-extinguishing magnet 51 located on the left side of the insulating cover 11 has an S pole on its left side and an N pole on its right side, while the arc-extinguishing magnet 51 located on the right side of the insulating cover 11 has an S pole on its left side and an N pole on its right side.

[0512] 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 left side of the arc-extinguishing magnet 51 located on the left side of the insulating cover 11 is the S pole and the right side is the N pole, and the left side of the arc-extinguishing magnet 51 located on the right side of the insulating cover 11 is the N pole and the right side is the S pole.

[0513] By providing two arc-extinguishing magnets 51 disposed opposite to each other, a magnetic field can be formed around the contact assembly 2 .

[0514] Therefore, the arc generated between the static contact lead-out terminal 21 and the movable spring piece 22 will be stretched in a direction away from each other by the action of the magnetic field, thereby achieving arc extinguishing.

[0515] The arc extinguishing unit 5 also includes two yoke clamps 52, which are arranged corresponding to the positions of the two arc extinguishing magnets 51. In addition, the two yoke clamps 52 surround the insulating cover 11 and the two arc extinguishing magnets 51. The design of the yoke clamps 52 surrounding the arc extinguishing magnets 51 can prevent the magnetic field generated by the arc extinguishing magnets 51 from spreading outward and affecting the arc extinguishing effect. The yoke clamps 52 are made of soft magnetic material. Soft magnetic materials can include but are not limited to iron, cobalt, nickel and their alloys.

[0516] When the short-circuit load is large, under the action of the short-circuit current, an electrodynamic repulsive force will be generated between the movable spring 22 and the static contact lead-out terminal 21, causing the contacts to spring open, resulting in arcing between the contacts and violent combustion, and even possible explosion.

[0517] To this end, as shown in Figures 47 to 53, the relay provided in this embodiment also includes an anti-short-circuit component 3, which is arranged on at least one side of the movable spring 22 along the axial direction of the static contact lead-out terminal 21. When a large fault current occurs in the movable spring 22, an attraction force is generated to resist the electric repulsion between the movable spring 22 and the static contact lead-out terminal 21.

[0518] Among them, the anti-short-circuit component 3 can also be a short-circuit ring arranged between a pair of static contact lead-out terminals 21. For a 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 along the direction in which a pair of static contact lead-out terminals 21 face each other, thereby preventing the insulation between the contacts from decreasing or the arc short-circuiting.

[0519] The axial direction of the static contact lead-out end 21 , the length direction of the movable spring piece 22 , and the width direction of the movable spring piece 22 are perpendicular to each other.

[0520] Specifically, the thrust portion 221 of the movable spring 22 is arranged between the two contact portions, and the anti-short-circuit component 3 is arranged on the thrust portion 221 of the movable spring 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 movable spring 22 and the static contact lead-out terminal 21.

[0521] In one embodiment, as shown in Figures 47-53 , the anti-short-circuit assembly 3 includes an upper magnetic conductor 31 and a lower magnetic conductor 32. The upper magnetic conductor 31 is disposed on the side of the movable spring 22 closer to the static contact lead 21. The lower magnetic conductor 32 is at least partially disposed on the side of the movable spring 22 farther from the static contact lead 21, thereby forming 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.

[0522] 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 22. 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 22 toward the direction close to the static contact lead-out end 21. When a large fault current occurs in the movable reed 22, since the upper magnetic conductor 31 is located above the movable reed 22 and the lower magnetic conductor 32 is located below the movable reed 22, the movable reed 22 is sandwiched between the upper magnetic conductor 31 and the lower magnetic conductor 32. When the upper magnetic conductor 31 generates an attractive force on the lower magnetic conductor 32, the attractive force attracts and pulls the movable reed 22 and is used to resist the electromotive force generated by the fault current between the movable reed 22 and the static contact lead-out terminal 21, thereby preventing the movable reed 22 and the static contact lead-out terminal 21 from being separated from each other and causing arcing and explosion, thereby ensuring the reliability and safety of the contact between the movable reed 22 and the static contact lead-out terminal 21.

[0523] In one embodiment, the upper magnet 31 can be a straight-line structure, positioned between the two contact portions of the movable spring 22. The upper magnet 31 can extend along the width of the movable spring 22, ensuring that the upper magnet 31 and the lower magnet 32 ​​are aligned. The lower magnet 32 ​​can be a U-shaped structure, with its opening facing the movable spring 22. The lower magnet 32 ​​has two side arms extending toward the upper magnet 31, allowing the two side arms of the lower magnet 32 ​​to approach or contact the ends of the upper magnet 31, thereby forming a surrounding magnetic ring along the width of the movable spring 22. Since the contact portions at both ends of the movable spring 22 along its length are movable contacts, the surrounding magnetic conductive ring formed along the width direction of the movable spring 22 will not interfere. When a large fault current occurs in the movable spring 22, an electromagnetic attraction force is generated in the pressure direction of the movable contact to resist the electromotive force generated by the fault current between the movable spring 22 and the static contact lead-out terminal 21.

[0524] The thrust portion 221 of the movable spring 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 .

[0525] In this manner, the thrust portion 221 of the movable spring 22 provides a mounting and securing location for the lower magnet 32, thereby enhancing the securing 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 positioned toward the thrust portion 221 of the movable spring 22. One side arm of the lower magnet 32 ​​wraps around the long side of the movable spring 22, and the other side arm extends through the through hole 2211.

[0526] In one embodiment, there are multiple upper magnetic conductors 31 and multiple lower magnetic conductors 32 , and the multiple upper magnetic conductors 31 and the multiple lower magnetic conductors 32 are correspondingly arranged, and the sides of two adjacent lower magnetic conductors 32 facing each other are passed through the through hole 2211 .

[0527] 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, further improving the effect of attracting and pulling the movable spring 22 to resist the electric repulsion generated by the fault current between the movable spring 22 and the static contact lead-out terminal 21.

[0528] 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 facing each other are simultaneously passed through the through hole 2211. The two lower magnetic conductors 32 are installed using the same through hole 2211, reducing production costs and assembly difficulty.

[0529] It should be 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.

[0530] Example 8

[0531] This embodiment is similar to the seventh embodiment, and the only difference is the structure of the first arc isolation groove 222 .

[0532] As shown in FIG. 65 to FIG. 67 , 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.

[0533] Specifically, as shown in Figure 65, the first arc isolation groove 222 is a linear structure with a simple structure and easy production and processing. Moreover, since the groove width of the first arc isolation groove 222 along the length direction of the dynamic spring piece 22 is relatively narrow, the overall structural strength of the dynamic spring piece 22 is relatively large.

[0534] As shown in FIG66 , the first arc isolation groove 222 is a convex structure, so that the first arc isolation groove 222 is a zigzag groove structure, which increases the tortuosity of the arc transfer path, thereby improving the arc extinguishing effect.

[0535] As shown in FIG67 , 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, thereby playing a double arc isolation role with good isolation and arc extinguishing effects.

[0536] It is understandable that the shapes of the two first arc isolation grooves 222 in this embodiment may be the same or different. For example, one of the first arc isolation grooves 222 may be a convex structure, and the other may be a linear structure.

[0537] It is understandable 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 may also be an S-shaped structure, a conical structure, etc., and its specific shape can be adjusted according to actual production conditions.

[0538] It should be noted that, as shown in Figures 68 to 70, the first arc isolation groove 222 can be replaced by an arc isolation rib 225. The setting 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.

[0539] Embodiment 9

[0540] This embodiment is similar to the seventh embodiment, and the only difference is the number and structure of the arc isolation structures.

[0541] As shown in Figures 71 and 72, the number of arc isolation parts provided in this embodiment is one, and the portion of the movable spring piece 22 not provided with the arc isolation part is located on both sides of the length direction of the movable spring piece 22 and contacts a pair of static contact lead-out ends 21 respectively.

[0542] Specifically, since a first arc isolation groove 222 is provided between a pair of static contact lead-out ends 21, the groove width of the first arc isolation groove 222 along the length direction of the movable spring piece 22 is relatively wide, and the portion of the movable spring piece 22 not provided with the first arc isolation groove 222 is located at both ends of the length direction of the movable spring piece 22 as two contact portions, and the two contact portions are respectively in contact with a pair of static contact lead-out ends 21. Arc isolation from two groups of movable and static contacts can be achieved by using a first arc isolation groove 22, which has a simple structure and relatively low production cost.

[0543] In one embodiment, as shown in FIG. 71 and FIG. 72 , 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 .

[0544] Specifically, the groove width of the first arc isolation groove 222 along the length direction of the movable spring piece 22 extends to near 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, and 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.

[0545] It should be noted that, as shown in Figures 71 and 72, the first arc-isolating groove 222 can be replaced by an arc-isolating rib 225. The setting position and shape of the arc-isolating rib 225 are similar to those of the first arc-isolating groove 222 and will not be described in detail.

[0546] Example 4

[0547] This embodiment is similar to the seventh embodiment and the eighth embodiment, except that other detailed structures of the movable spring 22 are added on the basis of the seventh or eighth embodiment.

[0548] 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 ends 21 face each other.

[0549] The movable spring 22 provided in this embodiment has a second arc isolation groove provided on the side wall of the movable spring 22, which prevents the arc from transferring along the side wall of the movable spring 22 toward the center line of the movable spring 22 in the longitudinal direction, thereby isolating and cutting off the transfer path of the arc along the side wall of the movable spring 22, thereby avoiding the arc short circuit caused by the two sets of movable and static contacts between the movable spring 22 and the pair of static contact lead-out terminals 21. The arc can be efficiently extinguished along the originally set arc extinguishing path of the magnetic blowing magnetic field, thereby improving the arc extinguishing capability.

[0550] In one embodiment, the second arc isolation groove is disposed between the center lines of a pair of static contact lead-out terminals 21 .

[0551] 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 sets of moving and static contacts between the moving spring 22 and a pair of static contact lead-out terminals 21, so as to ensure the high efficiency and thoroughness of arc extinguishing.

[0552] 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 22 along the length direction of the movable reed 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 22 along the width direction of the movable reed 22.

[0553] 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.

[0554] In one embodiment, the second arc isolation groove includes a second groove wall and a second groove bottom 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 the direction in which a pair of static contact lead-out ends 21 face each other.

[0555] Since the second arc isolation 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 a drop in the arc transfer path along the side wall of the movable spring piece 22. This drop makes it difficult for the arc to move toward the center line of the movable spring piece 22 in the longitudinal direction. The combination of the edge and the drop improves the arc extinguishing effect.

[0556] In one embodiment, the second arc isolation groove is a through groove along the axial direction of the static contact lead-out end 21 .

[0557] If the second arc-isolating groove extends along the length of the movable spring 22, the arc could migrate along the sidewall of the movable spring 22 where the second arc-isolating groove is not provided, posing a risk of arc short circuit. To address this issue, the second arc-isolating groove is provided as a through groove along the axial direction of the stationary contact lead-out terminal 21. Since the through groove extends through the height of the movable spring 22, once the arc enters the second arc-isolating groove, the arc's migration path toward the facing pair of stationary contact lead-out terminals 21 is completely cut off.

[0558] It should be noted that the movable spring shown in the drawings and described in this specification is only an example of the principles of the present disclosure. It should be clearly understood by those skilled in the art that the principles of the present disclosure are not limited to any details or any components of the devices shown in the drawings or described in the specification.

[0559] It should be understood that the present disclosure is not limited in its application to the detailed structure and arrangement of the components set forth in this specification. The present disclosure is capable of other embodiments and can be implemented and carried out in a variety of ways. The aforementioned variations and modifications fall within the scope of the present disclosure. It should be understood that the present disclosure 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 of these different combinations constitute multiple alternative aspects of the present disclosure. The embodiments described in this specification illustrate the best known ways to implement the present disclosure and will enable those skilled in the art to utilize the present disclosure.

[0560] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the inventions disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and illustrative embodiments are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

[0561] It should be understood that the present disclosure is not limited to the precise structures 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 disclosure is limited only by the appended claims.

Claims

1. An arc isolation structure, characterized in that: include: A first arc-isolating member is arranged outside the static contact lead-out end, and a pair of the static contact lead-out ends are used to contact or separate with the moving spring piece; Wherein, a first step and / or a first gap is provided between the first arc-isolating member and the static contact lead-out end, so as to prevent arc transfer.

2. The arc isolation structure according to claim 1, characterized in that: The first arc-isolating member is sleeved on the outside of the static contact lead-out end.

3. The arc isolation structure according to claim 1, 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.

4. The arc isolation structure according to claim 1, characterized in that: The outer peripheral wall of the first arc isolation 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 isolation 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 arc isolation structure according to claim 1, characterized in that: The first gap is arranged between the inner wall of the bottom 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 arc isolation structure according to claim 1, characterized in that: An end of the first gap facing the movable spring piece is provided with an open end, and an end of the first gap away from the movable spring piece is a closed end.

7. The arc isolation structure according to claim 1, 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.

8. The arc isolation structure according to claim 1, 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 positioning portion, and the other is provided with a positioning matching portion, and the positioning portion is clamped in the positioning matching portion.

9. The arc isolation structure according to claim 1, characterized in that: The first arc isolation member is made of insulating material.

10. The arc isolation structure according to any one of claims 1 to 9, characterized in that: A first guide gap is provided between an inner wall of the first arc-isolating member away from the top of one end of the movable spring sheet and an outer wall of the corresponding static contact lead-out end, and the first guide gap is used for guiding the static contact lead-out end.

11. A contact unit, characterized in that: It comprises a movable spring, a pair of static contact lead-out terminals and the arc-isolating structure according to any one of claims 1 to 10, wherein the movable spring is used to contact or separate with a pair of static contact lead-out terminals, the first arc-isolating member of the arc-isolating structure is arranged outside the static contact lead-out terminals, and the arc-isolating structure is used to hinder arc transfer.

12. The contact unit according to claim 11, characterized in that The parts where the movable spring piece contacts the pair of static contact lead-out terminals are two first contact parts, and at least part of the first step and / or the first gap is arranged between the inner edges of the two first contact parts.

13. The contact unit according to claim 11, 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 face each other.

14. The contact unit according to claim 13, characterized in that The arc isolation portion is a first arc isolation groove; and / or, The arc isolation portion is an arc isolation rib.

15. The contact unit according to claim 13, characterized in that The parts where the movable spring piece contacts with the pair of static contact lead-out ends are two first contact parts, and the arc-isolating part is arranged between the inner edges of the two first contact parts.

16. The contact unit according to any one of claims 11 to 15, characterized in that: The contact unit further comprises an insulating cover, the movable spring piece is movably arranged in the insulating cover, and the static contact lead-out end passes through the insulating cover and is at least partially arranged in the insulating cover.

17. The contact unit according to claim 16, characterized in that The first arc-isolating member is arranged outside the portion of the static contact lead-out terminal located inside the insulating cover.

18. A relay, characterized in that: The contact unit comprises the contact unit according to any one of claims 11 to 17.

19. The relay according to claim 18, characterized in that It also includes an anti-short circuit component, which is at least arranged on one side of the moving reed piece facing the static contact lead-out end, and generates suction when a large fault current occurs in the moving reed piece, so as to resist the electric repulsion between the moving reed piece and the static contact lead-out end.

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