Direct-acting relay

Abstract

The utility model relates to a direct-acting relay which comprises a shell, a push rod, a magnetic circuit part, a contact part and a lead-out part. The housing has a first side portion. The magnetic circuit part comprises a coil rack, and a coil is wound on the coil rack. The contact part comprises a main contact piece, a main static contact, an auxiliary movable contact piece and an auxiliary static contact. The main contact piece and the auxiliary movable contact piece can move along with the push rod. The leading-out part comprises a main leading-out piece, an auxiliary leading-out piece and a coil leading-out piece, the main leading-out piece, the auxiliary leading-out piece and the coil leading-out piece are respectively provided with a connecting end and an installing end, the connecting end of the main leading-out piece is connected with the main static contact, the connecting end of the auxiliary leading-out piece is connected with the auxiliary static contact, and the connecting end of the coil leading-out piece is connected with the coil. All the mounting ends are located on the side, away from the magnetic circuit part and the contact part, of the first side part. Therefore, the direct-acting relay can be electrically connected and matched with the client equipment conveniently, and the electric connection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of relays, in particular to a direct-acting relay. BACKGROUND

[0002] A relay is an electronic control device, which has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly applied in an automatic control circuit. The relay plays a role of automatic adjustment, safety protection and conversion circuit in the automatic control circuit.

[0003] A direct-acting relay is one of relays, which includes a magnetic circuit part and a contact part. The magnetic circuit part includes a coil and a moving iron core, etc. The contact part includes a main static contact, a main movable contact, an auxiliary static contact and an auxiliary movable contact. Through coil excitation, the moving iron core drives the main movable contact and the auxiliary movable contact to move, so as to make the main movable contact contact or separate from the main static contact, and the auxiliary movable contact contact or separate from the auxiliary static contact. Generally, the main static contact and the auxiliary static contact are connected with an outgoing structure, and the outgoing structure is electrically connected with a client device. However, the assembly efficiency of the common direct-acting relay is low. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a direct-acting relay, which facilitates the electrical connection of the direct-acting relay with a client device and improves the electrical connection efficiency.

[0005] A direct-acting relay, comprising:

[0006] a housing, the housing having a receiving cavity and a first side;

[0007] a magnetic circuit part, the magnetic circuit part being arranged in the receiving cavity, the magnetic circuit part including a coil holder, the coil holder being wound with a coil;

[0008] a push rod, the push rod being capable of moving along its axial direction under the drive of the magnetic circuit part;

[0009] a contact part, the contact part being arranged in the receiving cavity, the contact part including a main movable contact, a main static contact, an auxiliary movable contact and an auxiliary static contact, the main movable contact and the auxiliary movable contact being capable of moving synchronously with the push rod, under the push of the push rod, the main movable contact being capable of contacting or separating from the main static contact, and the auxiliary movable contact being capable of contacting or separating from the auxiliary static contact; and

[0010] The lead-out part comprises a main lead-out piece, an auxiliary lead-out piece and a coil lead-out piece, the main lead-out piece, the auxiliary lead-out piece and the coil lead-out piece all have a connecting end in the accommodating cavity and a mounting end outside the shell, the connecting end of the main lead-out piece is connected with the main static contact, the connecting end of the auxiliary lead-out piece is connected with the auxiliary static contact, and the connecting end of the coil lead-out piece is connected with the coil, and the mounting end of the main lead-out piece, the mounting end of the auxiliary lead-out piece and the mounting end of the coil lead-out piece are all located on the side of the first side part away from the accommodating cavity.

[0011] The direct-acting relay is convenient to electrically connect with the client device and improves the electric connection efficiency.

[0012] In one of the embodiments, the direct-acting relay further comprises a yoke plate and an insulating cover, the yoke plate is arranged at one end of the coil holder along the axial direction of the push rod, the yoke plate is provided with a plug hole, the push rod passes through the plug hole and can move along the axial direction of the plug hole, the insulating cover is arranged on the side of the yoke plate away from the coil holder, the mounting end of the main lead-out piece is arranged on the side of the yoke plate facing the insulating cover, and the mounting end of the auxiliary lead-out piece and the mounting end of the coil lead-out piece are arranged in the first direction away from the mounting end of the main lead-out piece. Since the main contact structure is connected with the high-voltage load and the auxiliary contact structure is connected with the low-voltage load, the main contact structure is high-voltage and the auxiliary contact structure is low-voltage, the mounting end of the main lead-out piece is arranged on the side of the insulating cover away from the yoke plate, and the mounting end of the auxiliary lead-out piece and the mounting end of the coil lead-out piece are arranged in the first direction away from the mounting end of the main lead-out piece, so that the safety distance between the high-voltage and the low-voltage can be ensured.

[0013] In one of the embodiments, the mounting end of the auxiliary lead-out piece is arranged on the side of the mounting end of the coil lead-out piece away from the mounting end of the main lead-out piece, or the mounting end of the auxiliary lead-out piece is arranged between the mounting end of the main lead-out piece and the mounting end of the coil lead-out piece.

[0014] In one of the embodiments, the first side is provided with a first through hole, a second through hole and a third through hole, all of which are communicated with the accommodating cavity, and the first through hole, the second through hole and the third through hole are sequentially and spacedly arranged along the first direction, the main lead-out member is arranged in the first through hole, the coil lead-out member is arranged in the second through hole, and the auxiliary lead-out member is arranged in the third through hole. In this way, the main lead-out member, the coil lead-out member and the auxiliary lead-out member are spacedly arranged, so that the creepage distance and the electrical clearance between the main lead-out member, the coil lead-out member and the auxiliary lead-out member are increased.

[0015] In one of the embodiments, the first through hole and the third through hole are respectively arranged at the two ends of the first side along the first direction, and the second through hole is arranged at the middle of the first side along the first direction. In this way, the creepage distance and the electrical clearance between the main lead-out member, the coil lead-out member and the auxiliary lead-out member are increased.

[0016] In one of the embodiments, the first through hole, the second through hole and the third through hole are provided with at least two, all of the first through holes are spacedly arranged along a direction parallel to the second direction, all of the second through holes are spacedly arranged along a direction parallel to the second direction, and all of the third through holes are spacedly arranged along a direction parallel to the second direction; the main lead-out member, the coil lead-out member and the auxiliary lead-out member are each provided with at least two, all of the main lead-out members are one-to-one correspondingly arranged in all of the first through holes, all of the coil lead-out members are one-to-one correspondingly arranged in all of the second through holes, and all of the auxiliary lead-out members are one-to-one correspondingly arranged in all of the third through holes, so that the arrangement directions of all of the main lead-out members, the arrangement directions of all of the coil lead-out members and the arrangement directions of all of the auxiliary lead-out members are parallel to each other. In this way, the creepage distance and the electrical clearance between the main lead-out member, the coil lead-out member and the auxiliary lead-out member are further increased.

[0017] In one of the embodiments, the mounting end of the main lead-out member, the mounting end of the coil lead-out member and the mounting end of the auxiliary lead-out member are parallel to each other. In this way, the creepage distance and the electrical clearance between the main lead-out member, the coil lead-out member and the auxiliary lead-out member are further increased, the accuracy of plug-in assembly is improved, and the difficulty of plug-in assembly is reduced.

[0018] In one of the embodiments, the push rod has a first end and a second end, the first end and the second end are axial ends of the push rod, the first end is arranged outside the bobbin, and the second end is arranged inside the bobbin; the active contact is connected to the first end, the main static contact is arranged on a side of the active contact away from the second end, the auxiliary active contact is connected to the second end, the auxiliary static contact is arranged on a side of the auxiliary active contact away from the first end, and the magnetic circuit part is arranged between the main static contact and the auxiliary static contact. By connecting the auxiliary active contact to the push rod, the size chain can be reduced, the perpendicularity is better, and the active contact and the auxiliary active contact can be prevented from tilting.

[0019] In one of the embodiments, the direct-acting relay further comprises a fixing frame arranged inside the accommodating cavity and located on a side of the bobbin away from the active contact, and the auxiliary lead-out member is fixedly connected to the fixing frame. In this way, the fixing frame can provide a mounting position for the auxiliary lead-out member, and the mounting of the auxiliary lead-out member is facilitated.

[0020] In one of the embodiments, the direct-acting relay further comprises a metal cover arranged inside the bobbin, the metal cover is provided with a receiving cavity and a through hole in communication with the receiving cavity, the moving iron core, the second end and the auxiliary active contact are movably arranged in the receiving cavity, one end of the auxiliary static contact is arranged outside the metal cover, and the other end of the auxiliary static contact is arranged in the receiving cavity through the through hole.

[0021] In one of the embodiments, the through hole is arranged on an end face of the metal cover along an axial direction of the push rod and close to the first end; and the direct-acting relay further comprises an insulating member, and the auxiliary static contact is insulatively connected to the metal cover through the insulating member. In this way, by arranging the insulating member, the auxiliary static contact and the metal cover can be prevented from being directly conducted.

[0022] In one of the embodiments, the auxiliary static contact is provided with a limiting boss, the limiting boss is arranged outside the metal cover, the insulating member is arranged between the metal cover and the limiting boss, and the insulating member is fixedly connected to the metal cover and the limiting boss. In this way, the limiting boss plays a limiting role on the insulating member, and the insulating member and the limiting boss are facilitated to be welded.

[0023] In one of the embodiments, the main lead-out member, the coil lead-out member and the auxiliary lead-out member are all in a sheet shape. In this way, the plug-in connection with the client device is facilitated.

[0024] In one of the embodiments, the auxiliary movable contact is an elastic piece. When the auxiliary stationary contact contacts the auxiliary movable contact, the auxiliary stationary contact presses against the auxiliary movable contact, so that the auxiliary movable contact deforms to generate elastic force, so as to increase the contact pressure between the auxiliary movable contact and the auxiliary stationary contact, so that the auxiliary stationary contact can better contact the auxiliary movable contact, and better electrical connection between the auxiliary stationary contact and the auxiliary movable contact is ensured, and the elastic force of the auxiliary movable contact provides counterforce for separation of the auxiliary stationary contact and the auxiliary movable contact. The auxiliary movable contact can be used to realize on-off of the auxiliary contact structure, and separate spring and movable contact parts are not needed, so that the assembly of parts is reduced, and the assembly efficiency is improved.

[0025] In one of the embodiments, the magnetic circuit part further comprises a movable iron core, a stationary magnetic conducting piece, and an elastic reset piece. The movable iron core is movably arranged in the inner hole, the movable iron core is connected with the push rod, the stationary magnetic conducting piece is located on the side of the movable iron core away from the auxiliary stationary contact, one end of the elastic reset piece is connected with the stationary magnetic conducting piece, the other end of the elastic reset piece is connected with the movable iron core, and the elastic reset piece can stretch and contract along the axial direction of the push rod. In this way, when the coil is powered, the movable iron core moves away from the auxiliary stationary contact under the action of the magnetic force, and the elastic reset piece is gradually compressed; when the coil is powered off, the movable iron core moves towards the auxiliary stationary contact under the action of the restoring force of the elastic reset piece to reset the movable iron core.

[0026] In one of the embodiments, the main stationary contact and the auxiliary stationary contact are each provided with at least two, and all the main stationary contacts contact or separate from the main movable contact under the pushing of the push rod, and all the auxiliary stationary contacts contact or separate from the auxiliary movable contact. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structure schematic view of a direct-acting relay according to an embodiment of the present application.

[0028] Figure 2 It is a structure schematic view of a direct-acting relay according to an embodiment of the present application. Figure 1 It is a structure schematic view of a direct-acting relay according to an embodiment of the present application.

[0029] Figure 3 It is a structure schematic view of a direct-acting relay according to an embodiment of the present application. Figure 2 It is a structure schematic view of a direct-acting relay according to an embodiment of the present application.

[0030] Figure 4 It is a front view of a direct-acting relay according to an embodiment of the present application, in which the auxiliary contact structure is in the on state.

[0031] Figure 5 It is a sectional view along A-A in FIG. Figure 4

[0032] ​Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0033] Figure 7 for Figure 4 The diagram shows a front view of a direct-acting relay with its main contact structure in the closed state.

[0034] Figure 8 for Figure 7 A cross-sectional view along the middle BB.

[0035] Figure 9 for Figure 8 A magnified view of a portion of point B in the middle.

[0036] Figure 10 for Figure 7 The diagram shows the structure of the magnetic circuit and the auxiliary stationary contact.

[0037] Figure 11 for Figure 10 The diagram shows an exploded view of the magnetic circuit and auxiliary stationary contact.

[0038] Figure 12 This is a front view of a direct-acting relay according to another embodiment of this application, with the auxiliary contact structure in the closed state.

[0039] Figure 13 for Figure 12 A cross-sectional view along the center CC.

[0040] Figure 14 for Figure 13 A magnified view of a portion of point C.

[0041] Figure 15 for Figure 12 The diagram shows a front view of a direct-acting relay with its main contact structure in the closed state.

[0042] Figure 16 for Figure 15 A sectional view along the middle DD.

[0043] Figure 17 for Figure 16 A magnified view of a portion of point D.

[0044] Figure 18 for Figure 15 The diagram shows the structure of the magnetic circuit and the auxiliary stationary contact.

[0045] Figure 19 for Figure 18 The diagram shows an exploded view of the magnetic circuit and auxiliary stationary contact.

[0046] Explanation of icon numbers:

[0047] 10, housing; 11, cover; 111, accommodating cavity; 12, side cover; 121, first side; 1211, first through hole; 1212, second through hole; 1213, third through hole; 20, magnetic circuit part; 21, coil holder; 211, inner hole; 22, moving iron core; 221, groove; 24, static iron core; 25, elastic return member; 26, coil; 27, yoke plate; 30, contact part; 31, main movable contact; 32, main static contact; 33, auxiliary movable contact; 331, first elastic arm; 3312, first through hole; 332, second elastic arm; 333, cover body; 3331, hollow cavity; 3332, third opening; 3333, fourth opening; 334, flange; 34, auxiliary static contact; 341, limiting boss; 35, limiting member; 351, third through hole; 36, fixing member; 361, fourth through hole; 40, leading-out part; 41, main leading-out member; 42, auxiliary leading-out member; 421, connecting hole; 43, coil leading-out member; 44, connecting end; 45, mounting end; 46, fixing frame; 461, insertion slot; 462, fourth through hole; 47, metal member; 471, fifth through hole; 48, insulating member; 481, mounting hole; 50, push rod; 51, first end; 52, second end; 521, first step surface; 522, second step surface; 523, third step surface; 524, fourth step surface; 53, gasket; 60, metal cover; 61, accommodating cavity; 62, second opening; 63, via hole; 70, insulating cover; 80, frame piece. DETAILED DESCRIPTION

[0048] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and it is therefore contemplated to cover all such modifications as fall within the scope of the application. It is to be understood that other embodiments can be utilized and structural or logical changes can be made without departing from the scope of the present application.

[0049] Referring to Figure 5 An embodiment of the present application provides a direct-acting relay, which comprises a housing 10, a magnetic circuit part 20, a contact part 30 and a push rod 50. The housing 10 has an accommodating cavity 111, and the magnetic circuit part 20, the contact part 30 and the push rod 50 are arranged in the accommodating cavity 111.

[0050] Referring to Figure 5The magnetic circuit part 20 comprises a coil holder 21 and a moving iron core 22. The coil holder 21 is provided with a coil 26, and the coil holder 21 is provided with an inner hole 211, and the moving iron core 22 is movably arranged in the inner hole 211. The push rod 50 is connected with the moving iron core 22. When the coil 26 is electrified, the moving iron core 22 can move in the inner hole 211 under the action of the magnetic field force, so as to drive the push rod 50 to move along the axial direction.

[0051] Optionally, referring to Figure 5 , the inner hole 211 of the coil holder 21 is provided with a metal cover 60, and the metal cover 60 is provided with a receiving cavity 61, and the moving iron core 22 is movably arranged in the receiving cavity 61.

[0052] Of course, if the product does not need to be sealed, the metal cover 60 can also not be arranged.

[0053] Referring to Figure 5 , the contact part 30 comprises a main active contact 31, a main static contact 32, an auxiliary active contact 33 and an auxiliary static contact 34. The main static contact 32 and the main active contact 31 cooperate to form a main contact structure, and the auxiliary static contact 34 and the auxiliary active contact 33 cooperate to form an auxiliary contact structure. Optionally, the main active contact 31 and the auxiliary active contact 33 are connected to the push rod 50; or the main active contact 31 is connected to the push rod 50, and the auxiliary active contact 33 is connected to the moving iron core 22, so that the main active contact 31 and the auxiliary active contact 33 can move synchronously with the push rod 50. Under the pushing of the push rod 50, the main static contact 32 and the main active contact 31 are in contact or separated, and the auxiliary static contact 34 and the auxiliary active contact 33 are in contact or separated.

[0054] By connecting the auxiliary active contact 33 to the push rod 50, the size chain can be reduced, the perpendicularity is better, and the auxiliary active contact 33 is prevented from being inclined. In addition, referring to Figure 6 , since the end face of the moving iron core 22 close to the auxiliary static contact 34 is provided with a groove 221, in this embodiment, the auxiliary active contact 33 is connected to the push rod 50, and when the push rod 50 and the moving iron core 22 are fixed by dispensing at the groove 221, the auxiliary active contact 33 will not shield the groove 221, so as to facilitate dispensing at the groove 221.

[0055] It should be noted that the number of the main static contact 32 and the auxiliary static contact 34 can be set according to actual needs. Specifically, the main static contact 32 and the auxiliary static contact 34 are each provided with at least two, and under the pushing of the push rod 50, all the main static contacts 32 and the main active contacts 31 are in contact or separated, and all the auxiliary static contacts 34 and the auxiliary active contacts 33 are in contact or separated.

[0056] In this embodiment, referring to Figure 5 , the main static contact 32 and the auxiliary static contact 34 are provided with two.

[0057] Further, the main static contact 32 is provided with a main static contact point, and the main active contact 31 is provided with a main active contact point. The main static contact 32 is integrally provided with the main static contact point, or the main static contact 32 is separately provided with the main static contact point and connected with the main static contact point; the main active contact 31 is integrally provided with the main active contact point, or the main active contact 31 is separately provided with the main active contact point and connected with the main active contact point. The auxiliary static contact 34 is provided with an auxiliary static contact point, and the auxiliary active contact 33 is provided with an auxiliary active contact point. The auxiliary static contact 34 is integrally provided with the auxiliary static contact point, or the auxiliary static contact 34 is separately provided with the auxiliary static contact point and connected with the auxiliary static contact point; the auxiliary active contact 33 is integrally provided with the auxiliary active contact point, or the auxiliary active contact 33 is separately provided with the auxiliary active contact point and connected with the auxiliary active contact point.

[0058] Under the pushing of the pushing rod 50, the main static contact point is in contact with or separated from the main active contact point, and the auxiliary static contact point is in contact with or separated from the auxiliary active contact point. Referring to Figure 5 When the coil 26 is not powered, the main static contact 32 is separated from the main active contact 31, that is, the main contact point structure is in an off state, and at the same time, the auxiliary static contact 34 is in contact with the auxiliary active contact 33, that is, the auxiliary contact point structure is in a conductive state. Referring to Figure 8 When the coil 26 is powered, under the action of the magnetic force, the active iron core 22 moves away from the auxiliary static contact 34, and further drives the pushing rod 50 and the main active contact 31 and the auxiliary active contact 33 thereon to move away from the auxiliary static contact 34, so that the main static contact 32 is in contact with the main active contact 31, realizing the conduction of the main contact point structure, and at the same time, the auxiliary static contact 34 is separated from the auxiliary active contact 33, realizing the disconnection of the auxiliary contact point structure.

[0059] In an embodiment, referring to Figure 1 , the shell 10 has a first side portion 121. For example, Figure 1 , the first side portion 121 is the left side of the shell 10.

[0060] Further, referring to Figure 1 , the shell 10 includes a cover 11 and a side cover 12. The cover 11 has a receiving cavity 111 and a first opening in communication with the receiving cavity 111, and the side cover 12 is arranged at the first opening. The side cover 12 is the first side portion 121.

[0061] In an embodiment, referring to Figure 1 , Figure 2 and Figure 3The direct-acting relay further comprises an outgoing portion 40. The outgoing portion 40 comprises a main outgoing piece 41, an auxiliary outgoing piece 42 and a coil outgoing piece 43, all of which have a connecting end 44 and a mounting end 45, the connecting end 44 being located in the accommodating cavity 111, and the mounting end 45 being located outside the housing 10. The connecting end 44 of the main outgoing piece 41 is connected with the main static contact 32, the connecting end 44 of the auxiliary outgoing piece 42 is connected with the auxiliary static contact 34, and the connecting end 44 of the coil outgoing piece 43 is connected with the coil 26. The mounting end 45 of the main outgoing piece 41, the mounting end 45 of the auxiliary outgoing piece 42 and the mounting end 45 of the coil outgoing piece 43 are all located on the side of the first side portion 121 away from the magnetic circuit portion 20 and the contact portion 30.

[0062] Since the mounting end 45 of the main outgoing piece 41, the mounting end 45 of the auxiliary outgoing piece 42 and the mounting end 45 of the coil outgoing piece 43 are all located outside the housing 10 and on the same side, it is convenient for the direct-acting relay to be electrically connected with the client device, and the electrical connection efficiency is improved.

[0063] In one embodiment, referring to Figure 2 The main outgoing piece 41, the auxiliary outgoing piece 42 and the coil outgoing piece 43 are all in a sheet structure.

[0064] Of course, in other embodiments, the main outgoing piece 41, the auxiliary outgoing piece 42 and the coil outgoing piece 43 can also be in other structures, which are not limited thereto.

[0065] In one embodiment, referring to Figure 5 The direct-acting relay further comprises a yoke plate 27 and an insulating cover 70. The yoke plate 27 is located at one end of the coil holder 21 along the axial direction of the push rod 50, and is provided with a plug hole through which the push rod 50 passes and can move along the axial direction of the plug hole. The insulating cover 70 is located on the side of the yoke plate 27 away from the coil holder 21, and is spaced apart from the yoke plate 27. A frame piece 80 is arranged between the insulating cover 70 and the yoke plate 27, and the insulating cover 70 is connected with the yoke plate 27 through the frame piece 80.

[0066] Since the main contact structure is connected with a high-voltage load and the auxiliary contact structure is connected with a low-voltage load, the main contact structure is subjected to high voltage and the auxiliary contact structure is subjected to low voltage. Therefore, in the embodiment, the mounting end 45 of the main outgoing piece 41 is located on the side of the yoke plate 27 facing the insulating cover 70, and the mounting end 45 of the auxiliary outgoing piece 42 and the mounting end 45 of the coil outgoing piece 43 are spaced apart from the mounting end 45 of the main outgoing piece 41 along a first direction. The first direction is parallel to the axial direction of the push rod 50, and is represented by S1. In this way, a safety distance between the high voltage and the low voltage can be ensured. In one embodiment, referring to Figure 5The mounting end 45 of the auxiliary lead-out piece 42 is disposed on the side of the mounting end 45 of the coil lead-out piece 43 which is away from the mounting end 45 of the main lead-out piece 41. It can be understood that, in the first direction, the mounting end 45 of the coil lead-out piece 43 is located between the mounting end 45 of the main lead-out piece 41 and the mounting end 45 of the auxiliary lead-out piece 42.

[0067] Of course, in other embodiments, the mounting end 45 of the auxiliary lead-out piece 42 is disposed between the mounting end 45 of the main lead-out piece 41 and the mounting end 45 of the coil lead-out piece 43. It can be understood that, in the first direction, the mounting end 45 of the auxiliary lead-out piece 42 is located between the mounting end 45 of the main lead-out piece 41 and the mounting end 45 of the coil lead-out piece 43.

[0068] In one embodiment, referring to Figure 5 and Figure 8 The push rod 50 has a first end 51 and a second end 52, which are respectively the two axial ends of the push rod 50. The second end 52 is movably disposed in the accommodation cavity 61. The metal cover 60 is further provided with a second opening 62, and the first end 51 is disposed outside the metal cover 60 through the second opening 62.

[0069] Further, referring to Figure 5 and Figure 8 The main movable contact 31 is connected to the first end 51 through the contact support and is disposed in the insulating cover 70. The auxiliary movable contact 33 is connected to the second end 52. In this way, connecting the main movable contact 31 and the auxiliary movable contact 33 to the push rod 50 can reduce the size chain, improve the perpendicularity, and avoid the inclination of the main movable contact 31 and the auxiliary movable contact 33.

[0070] The main stationary contact 32 is disposed on the side of the main movable contact 31 which is away from the second end 52. Specifically, the main stationary contact 32 is disposed on the side of the insulating cover 70 which is away from the yoke plate 27.

[0071] The auxiliary stationary contact 34 is disposed on the side of the auxiliary movable contact 33 which is away from the first end 51. The auxiliary stationary contact 34 is at least partially disposed in the accommodation cavity 61. Specifically, the metal cover 60 is further provided with a via hole 63 which is in communication with the accommodation cavity 61. One end of the auxiliary stationary contact 34 is disposed in the accommodation cavity 61, and the other end of the auxiliary stationary contact 34 is disposed outside the metal cover 60 through the via hole 63. The magnetic circuit part 20 is disposed between the main stationary contact 32 and the auxiliary stationary contact 34.

[0072] It can be understood that, in the first direction, the auxiliary stationary contact 34 is located between the main stationary contact 32 and the coil lead-out piece 43. Figure 5For example, the main static contact 32 and the main movable contact 31 are arranged in the upper space of the housing 10, the magnetic circuit part 20 is arranged in the middle space of the housing 10, and the auxiliary static contact 34 and the auxiliary movable contact 33 are arranged in the lower space of the housing 10, i.e. the main contact structure and the auxiliary contact structure are arranged in the upper part and the lower part of the direct-acting relay respectively, and the main movable contact 31 and the auxiliary movable contact 33 are driven to move by the up-down movement of the push rod 50 to make the main contact structure and the auxiliary contact structure connect or disconnect. In this way, the space utilization rate can be improved, the direct-acting relay structure is compact, and the creepage distance and the electrical clearance between the main contact structure, the auxiliary contact structure and the coil 26 are increased.

[0073] In one embodiment, referring to Figure 5 The magnetic circuit part 20 further comprises a static magnetic conducting member and an elastic reset member 25. The static magnetic conducting member is arranged on the side of the movable iron core 22 away from the auxiliary static contact 34. The elastic reset member 25 is arranged in the metal cover 60, one end of the elastic reset member 25 is connected with the static magnetic conducting member, the other end of the elastic reset member 25 is connected with the movable iron core 22, and the elastic reset member 25 can stretch and contract along the axial direction of the push rod 50. Optionally, the elastic reset member 25 is a reset spring, and the reset spring is sleeved on the push rod 50.

[0074] When the coil 26 is powered, the movable iron core 22 moves away from the auxiliary static contact 34 under the action of the magnetic field force, and the elastic reset member 25 is gradually compressed. When the coil 26 is powered off, the movable iron core 22 moves towards the auxiliary static contact 34 under the action of the restoring force of the elastic reset member 25 to reset the movable iron core 22.

[0075] Optionally, the static magnetic conducting member is a yoke plate 27, and the yoke plate 27 cooperates with the movable iron core 22 to realize magnetic conduction.

[0076] Optionally, the static magnetic conducting member is a static iron core 24, the static iron core 24 is arranged in the metal cover 60 and fixedly connected with the yoke plate 27, and the static iron core 24 cooperates with the movable iron core 22 to realize magnetic conduction.

[0077] In one embodiment, referring to Figure 1 The first side portion 121 is provided with a first through hole 1211, a second through hole 1212 and a third through hole 1213. The first through hole 1211, the second through hole 1212 and the third through hole 1213 are all in communication with the accommodating cavity 111, and the first through hole 1211, the second through hole 1212 and the third through hole 1213 are sequentially and spaced apart in the first direction. The main lead-out member 41 is arranged in the first through hole 1211, the coil lead-out member 43 is arranged in the second through hole 1212, and the auxiliary lead-out member 42 is arranged in the third through hole 1213. In this way, the main lead-out member 41, the coil lead-out member 43 and the auxiliary lead-out member 42 are spaced apart, which can increase the creepage distance and the electrical clearance between the main lead-out member 41, the coil lead-out member 43 and the auxiliary lead-out member 42.

[0078] In one embodiment, referring to Figure 1 , the first through hole 1211 and the third through hole 1213 are respectively located at the two ends of the first side 121 along the first direction, and the second through hole 1212 is located at the middle of the first side 121 along the first direction. For example, Figure 1 , the first through hole 1211 is arranged at the upper part of the first side 121, the second through hole 1212 is arranged at the middle part of the first side 121, and the third through hole 1213 is arranged at the lower part of the first side 121.

[0079] During installation, the main lead-out piece 41 is arranged in the first through hole 1211, that is, the main lead-out piece 41 is arranged at the upper part of the first side 121, so that the main lead-out piece 41 corresponds to the main static contact 32, facilitating the connection of the main lead-out piece 41 and the main static contact 32, and improving the convenience of connection. During installation, the coil lead-out piece 43 is arranged in the second through hole 1212, that is, the coil lead-out piece 43 is arranged at the middle part of the first side 121, so that the coil lead-out piece 43 corresponds to the coil 26, facilitating the connection of the coil lead-out piece 43 and the coil 26, and improving the convenience of connection. During installation, the auxiliary lead-out piece 42 is arranged in the third through hole 1213, that is, the auxiliary lead-out piece 42 is arranged at the lower part of the first side 121, so that the auxiliary lead-out piece 42 corresponds to the auxiliary static contact 34, facilitating the connection of the auxiliary lead-out piece 42 and the auxiliary static contact 34, and improving the convenience of connection.

[0080] In addition, arranging the main lead-out piece 41 at the upper part of the first side 121, the coil lead-out piece 43 at the middle part of the first side 121, and the auxiliary lead-out piece 42 at the lower part of the first side 121 can increase the creepage distance and electrical clearance between the main lead-out piece 41, the coil lead-out piece 43, and the auxiliary lead-out piece 42.

[0081] In one embodiment, referring to Figure 1 , the first through hole 1211, the second through hole 1212, and the third through hole 1213 are arranged at least two, all the first through holes 1211 are arranged in parallel to the second direction, all the second through holes 1212 are arranged in parallel to the second direction, and all the third through holes 1213 are arranged in parallel to the second direction. Wherein, the first direction is perpendicular to the second direction, and the second direction is represented by S2.

[0082] It can be understood that, referring to Figure 1 , the arrangement direction of all the first through holes 1211, the arrangement direction of all the second through holes 1212, and the arrangement direction of all the third through holes 1213 are parallel to each other.

[0083] Further, referring to Figure 1Each main lead 41, coil lead 43, and auxiliary lead 42 is provided with at least two of each. All main leads 41 are respectively disposed in all first through holes 1211, all coil leads 43 are respectively disposed in all second through holes 1212, and all auxiliary leads 42 are respectively disposed in all third through holes 1213. This ensures that the arrangement directions of all main leads 41, all coil leads 43, and all auxiliary leads 42 are parallel. This further increases the creepage distance and clearance between the main leads 41, coil leads 43, and auxiliary leads 42.

[0084] In one embodiment, see Figure 4 , Figure 7 , Figure 12 and Figure 15 The mounting ends 45 of the main lead 41, the coil lead 43, and the auxiliary lead 42 are parallel to each other. This further increases the creepage distance and clearance between the main lead 41, the coil lead 43, and the auxiliary lead 42. Simultaneously, it improves the accuracy of insertion alignment and reduces the difficulty of insertion.

[0085] It is understandable that the parallelism of the mounting end 45 of the main lead 41, the mounting end 45 of the coil lead 43, and the mounting end 45 of the auxiliary lead 42 means that the width direction of the mounting end 45 of the main lead 41, the mounting end 45 of the coil lead 43, and the mounting end 45 of the auxiliary lead 42 is parallel to the second direction, and the thickness direction of the main lead 41, the thickness direction of the coil lead 43, and the thickness direction of the auxiliary lead 42 are consistent and parallel to the first direction.

[0086] Of course, in other embodiments, the mounting end 45 of the main lead 41, the mounting end 45 of the coil lead 43, and the mounting end 45 of the auxiliary lead 42 may not be parallel, as long as the arrangement direction of all the main leads 41, the arrangement direction of all the coil leads 43, and the arrangement direction of all the auxiliary leads 42 are parallel.

[0087] In one embodiment, see Figure 2 and Figure 5 The direct-acting relay also includes a mounting bracket 46. The mounting bracket 46 is disposed within the receiving cavity 111 and is located on the side of the coil holder 21 opposite to the active contact 31. Figure 5 For example, the mounting bracket 46 is located below the coil holder 21. The auxiliary lead-out member 42 is fixedly connected to the mounting bracket 46. In this way, the mounting bracket 46 provides a fixed position for the auxiliary lead-out member 42.

[0088] Optionally, see Figure 11 and Figure 19The auxiliary lead-out piece 42 is inserted and matched with the fixing frame 46. Specifically, the fixing frame 46 is provided with a slot 461 which is recessed towards the pushing rod 50. The connecting end 44 of the auxiliary lead-out piece 42 is arranged in the slot 461, and the mounting end 45 of the auxiliary lead-out piece 42 is arranged outside the slot 461. During mounting, the connecting end 44 of the auxiliary lead-out piece 42 is inserted into the slot 461, so that the auxiliary lead-out piece 42 is mounted on the fixing frame 46, facilitating the mounting of the auxiliary lead-out piece 42 and improving the mounting efficiency.

[0089] Further, referring to Figure 11 and Figure 19 , the bottom of the slot 461 is the side of the fixing frame 46 close to the auxiliary static contact 34, and the bottom of the slot 461 is provided with a fourth through hole 462 which is in communication with the slot 461, and the auxiliary static contact 34 is connected with the connecting end 44 of the auxiliary lead-out piece 42 through the fourth through hole 462. In this way, the connection of the auxiliary static contact 34 and the auxiliary lead-out piece 42 can be realized.

[0090] Of course, in other embodiments, the auxiliary lead-out piece 42 can also be integrally injection molded with the fixing frame 46.

[0091] In an embodiment, referring to Figure 3 , Figure 11 and Figure 19 , the connecting end 44 of the auxiliary lead-out piece 42 is provided with a connecting hole 421, and one end of the auxiliary static contact 34 is arranged in the connecting hole 421 and fixedly connected with the hole wall of the connecting hole 421. Alternatively, the auxiliary static contact 34 is clamped or welded with the hole wall of the connecting hole 421. In this way, no additional parts are needed, the assembly of parts is reduced, and the assembly efficiency is improved.

[0092] In an embodiment, referring to Figure 10 and Figure 18 , the auxiliary switch assembly further comprises an insulating piece 48. The auxiliary static contact 34 is insulatedly connected with the metal cover 60 through the insulating piece 48. In this way, the insulating piece 48 plays an insulating role, avoiding the direct conduction of the auxiliary static contact 34 and the metal cover 60.

[0093] Further, referring to Figure 9 and Figure 11 , the auxiliary static contact 34 is provided with a limiting boss 341. The limiting boss 341 is arranged outside the metal cover 60, the insulating piece 48 is arranged between the metal cover 60 and the limiting boss 341, and the insulating piece 48 is fixedly connected with the metal cover 60 and the limiting boss 341. In this way, the limiting boss 341 plays a limiting role on the insulating piece 48, and also facilitates the welding of the insulating piece 48 and the limiting boss 341.

[0094] In an embodiment, referring to Figure 6 and Figure 9The insulating member 48 is a ceramic member. The ceramic member is arranged outside the metal cover 60 and on the side of the second end 52 away from the first end 51. The ceramic member is provided with a mounting hole 481 in communication with the through hole 63, and the auxiliary static contact 34 is arranged in the mounting hole 481. In this way, the ceramic member provides a mounting position for the auxiliary static contact 34, facilitating the mounting of the auxiliary static contact 34, and the ceramic member can also serve as an insulating member.

[0095] In this embodiment, referring to Figure 6 and Figure 9 , the mounting hole 481 is provided with two, and the two auxiliary static contacts 34 are each provided with two mounting holes 481.

[0096] Further, referring to Figure 1 , Figure 6 and Figure 8 , the auxiliary switch assembly further includes a metal member 47. The metal member 47 is arranged between the metal cover 60 and the ceramic member, and the metal member 47 cooperates with the ceramic member to form a whole covering the through hole 63, and the metal member 47 is welded to the metal cover 60. The metal member 47 has an axially extending fifth through hole 471 in communication with the mounting hole 481 and the through hole 63, one end of the auxiliary static contact 34 is arranged outside the metal cover 60, and the other end of the auxiliary static contact 34 is arranged in the receiving cavity 61 through the mounting hole 481, the fifth through hole 471 and the through hole 63. In this way, the auxiliary static contact 34 is fixed to the metal cover 60 by welding. In addition, the metal member 47 cooperates with the ceramic member to form a whole that can seal the through hole 63 to seal the metal cover 60.

[0097] In another embodiment, the insulating member 48 includes a glass body. The glass body is arranged in the through hole 63 to cover the through hole 63, and the auxiliary static contact 34 is connected to the metal cover 60 through the glass body. It can be understood that the auxiliary static contact 34, the glass body and the metal cover 60 are sintered together in the through hole 63, that is, one end of the auxiliary static contact 34 is located outside the receiving cavity 61, and the other end of the auxiliary static contact 34 is located outside the receiving cavity 61. In this way, the parts are simplified and the assembly efficiency is improved. In addition, the glass body can seal the through hole 63 to seal the metal cover 60.

[0098] In one embodiment, the auxiliary movable contact 33 is a resilient member. When the auxiliary stationary contact 34 contacts the auxiliary movable contact 33, the auxiliary stationary contact 34 presses against the auxiliary movable contact 33, causing the auxiliary movable contact 33 to deform and generate elastic force to increase the contact pressure between the auxiliary stationary contact 34 and the auxiliary movable contact 33, so that the auxiliary stationary contact 34 can better contact the auxiliary movable contact 33, ensuring better electrical connection between the auxiliary stationary contact 34 and the auxiliary movable contact 33, and the elastic force of the auxiliary movable contact 33 provides a counterforce for the separation of the auxiliary stationary contact 34 and the auxiliary movable contact 33. Since the auxiliary movable contact 33 is resilient, the auxiliary movable contact 33 can also act as a buffer during the contact between the auxiliary movable contact 33 and the auxiliary stationary contact 34, preventing damage to the auxiliary stationary contact 34 and the auxiliary movable contact 33 and prolonging the service life of the auxiliary stationary contact 34 and the auxiliary movable contact 33. The use of the auxiliary movable contact 33 can achieve the on-off of the auxiliary contact structure without the need for separate springs and movable contacts, reducing the assembly of parts and improving assembly efficiency.

[0099] In one embodiment, referring to Figure 5 、 Figure 6 、 Figure 8 、 Figure 9 and Figure 11 , the auxiliary movable contact 33 includes a first resilient arm 331 and a second resilient arm 332. The second resilient arm 332 is arranged on the side of the first resilient arm 331 facing the auxiliary stationary contact 34. The first resilient arm 331 is provided with a first through hole 3312, and the first resilient arm 331 is sleeved on the second end 52 of the push rod 50 through the first through hole 3312. The second resilient arm 332 is provided with a second through hole, and the second resilient arm 332 is sleeved on the second end 52 of the push rod 50 through the second through hole.

[0100] It should be noted that the first resilient arm 331 and the second resilient arm 332 are sleeved on the second end 52 of the push rod 50, not fixed on the second end 52 of the push rod 50, which can avoid excessive stress on the auxiliary movable contact 33 and breakage.

[0101] Under the pushing of the push rod 50, the auxiliary movable contact 33 moves towards the auxiliary stationary contact 34, and the auxiliary stationary contact 34 contacts the second resilient arm 332. During the contact, the second resilient arm 332 deforms under the pressure of the auxiliary stationary contact 34 to generate elastic force, increasing the contact pressure between the auxiliary stationary contact 34 and the auxiliary movable contact 33, so that the auxiliary stationary contact 34 can better contact the second resilient arm 332, ensuring better electrical connection between the auxiliary stationary contact 34 and the auxiliary movable contact 33, and the elastic force of the second resilient arm 332 provides a counterforce for the separation of the auxiliary stationary contact 34 and the auxiliary movable contact 33.

[0102] Optionally, referring to Figure 11The first elastic arm 331 is arranged at an angle with the second elastic arm 332, and the first elastic arm 331 and the second elastic arm 332 are connected to form a V shape. Specifically, the spring sheet is bent to obtain the V-shaped auxiliary movable contact piece 33, so that the processing is simplified and the processing efficiency is improved.

[0103] In the embodiment, referring to Figure 6 The first elastic arm 331 is perpendicular to the axial direction of the push rod 50, that is, the first elastic arm 331 is arranged horizontally. One end of the length direction of the second elastic arm 332 is connected with the first elastic arm 331, and the other end of the length direction of the second elastic arm 332 is inclined towards the auxiliary stationary contact 34.

[0104] Of course, in other embodiments, the auxiliary movable contact piece 33 is in a U shape. Alternatively, the auxiliary movable contact piece 33 is in a W shape.

[0105] Further, the connection part of the first elastic arm 331 and the second elastic arm 332 adopts a circular arc transition. In this way, the toughness and fatigue strength of the auxiliary movable contact piece 33 can be increased.

[0106] In one embodiment, referring to Figure 11 The second through hole is a strip-shaped hole extending along the length direction of the second elastic arm 332, and the second end 52 of the push rod 50 is arranged in the strip-shaped hole. Since the second elastic arm 332 is inclined from the first elastic arm 331 towards the auxiliary stationary contact 34, when the auxiliary stationary contact 34 contacts the auxiliary movable contact piece 33, the movement of the second elastic arm 332 is not a straight line. Therefore, the second through hole is designed as a strip-shaped hole, so that the strip-shaped hole can give way to the movement of the auxiliary movable contact piece 33, avoiding the movement of the second elastic arm 332 being interfered. In addition, the strip-shaped hole cooperates with the push rod 50 to play a certain guiding role, so that the movement of the second elastic arm 332 has a guiding property, ensuring the stability of the contact between the auxiliary stationary contact 34 and the auxiliary movable contact piece 33.

[0107] In one embodiment, referring to Figure 6 and Figure 9The second end 52 is provided with a first limiting structure and a second limiting structure. The first limiting structure is arranged on the side of the auxiliary movable contact 33 away from the auxiliary stationary contact 34, and the second limiting structure is arranged on the side of the auxiliary movable contact 33 close to the auxiliary stationary contact 34. The first limiting structure cooperates with the second limiting structure to arrange the auxiliary movable contact 33 on the second end 52. Since the auxiliary movable contact 33 is sleeved on the second end 52 of the push rod 50, the first limiting structure and the second limiting structure are arranged on the second end 52 of the push rod 50. The auxiliary movable contact 33 is arranged between the first limiting structure and the second limiting structure. The first limiting structure limits the movement of the auxiliary movable contact 33 away from the auxiliary stationary contact 34, and the second limiting structure limits the movement of the auxiliary movable contact 33 close to the auxiliary stationary contact 34. Thus, under the cooperation of the first limiting structure and the second limiting structure, the auxiliary movable contact 33 is limited on the second end 52 of the push rod 50, which ensures that the auxiliary movable contact 33 can contact the auxiliary stationary contact 34, and at the same time avoids the separation of the auxiliary movable contact 33 from the push rod 50.

[0108] In one embodiment, referring to Figure 6 and Figure 9 , the first limiting structure includes a first limiting step. The first limiting step has a first step surface 521 extending along the axial direction of the push rod 50, and a second step surface 522 facing the auxiliary stationary contact 34. The first step surface 521 is perpendicular to the second step surface 522. The hole wall of the first through hole 3312 is adapted to the first step surface 521, and the side of the first elastic arm 331 away from the second elastic arm 332 abuts against the second step surface 522. During installation, the auxiliary movable contact 33 is sleeved on the first step surface 521, and the first step surface 521 provides an installation position for the auxiliary movable contact 33, facilitating the installation of the auxiliary movable contact 33. At the same time, the side of the first elastic arm 331 away from the second elastic arm 332 abuts against the second step surface 522, and the second step surface 522 can limit the movement of the first elastic arm 331 relative to the push rod 50 away from the auxiliary stationary contact 34, ensuring the reliability of the installation of the auxiliary movable contact 33.

[0109] Further, referring to Figure 6 and Figure 9 , the direct-acting relay further includes a gasket 53, and the diameter of the gasket 53 is greater than the diameter of the second step surface 522. The gasket 53 is arranged on the first limiting step, specifically, the gasket 53 is arranged between the auxiliary movable contact 33 and the second step surface 522 and abuts against the first elastic arm 331 and the second step surface 522, and the hole in the middle of the gasket 53 is adapted to the first step surface 521. In this way, the cooperation area of the first elastic arm 331 and the second step surface 522 can be increased.

[0110] In one embodiment, referring to Figure 6 and Figure 9The second limiting structure includes a limiting piece 35. The limiting piece 35 is provided with a third through hole 351. The limiting piece 35 is sleeved on the second end 52 of the push rod 50 through the third through hole 351, and the limiting piece 35 is fixedly connected with the push rod 50. In this way, the limiting piece 35 limits the movement of the auxiliary moving contact piece 33 towards the auxiliary stationary contact 34, preventing the auxiliary moving contact piece 33 from being separated from the second end 52 of the push rod 50. In addition, under the action of the limiting piece 35, the auxiliary moving contact piece 33 has a certain pre-compression force.

[0111] It should be noted that there are various ways to fixedly connect the limiting piece 35 with the push rod 50. Alternatively, the hole wall of the third through hole 351 is snap-fitted with the push rod 50; or the hole wall of the third through hole 351 is welded with the push rod 50; or the limiting piece 35 is riveted with the push rod 50.

[0112] In one embodiment, referring to Figure 6 and Figure 9 , the second end 52 is further provided with a second limiting step. The second limiting step has a third step surface 523 extending along the axial direction of the push rod 50, and a fourth step surface 524 facing the auxiliary stationary contact 34. The third step surface 523 is perpendicular to the fourth step surface 524. The hole wall of the third through hole 351 is adapted to the third step surface 523, and the side of the limiting piece 35 away from the auxiliary stationary contact 34 abuts against the fourth step surface 524. During installation, the limiting piece 35 is sleeved on the third step surface 523, and the third step surface 523 provides an installation position for the limiting piece 35, facilitating the installation of the limiting piece 35. At the same time, the side of the limiting piece 35 away from the auxiliary stationary contact 34 abuts against the fourth step surface 524, and the fourth step surface 524 functions as a limiting piece, preventing the limiting piece 35 from moving away from the auxiliary stationary contact 34 relative to the push rod 50, and ensuring the reliability of the installation of the limiting piece 35.

[0113] In another embodiment, referring to Figure 13 , Figure 16 and Figure 19 , the auxiliary moving contact piece 33 includes a cover 333 provided on the second end 52. Under the pushing of the push rod 50, the auxiliary stationary contact 34 contacts or separates from the auxiliary moving contact piece 33.

[0114] When the auxiliary static contact 34 contacts the auxiliary moving contact 33, the auxiliary static contact 34 presses against the auxiliary moving contact 33, so that the auxiliary moving contact 33 is deformed and generates elastic force to increase the contact pressure between the auxiliary moving contact 33 and the auxiliary static contact 34, so that the auxiliary static contact 34 can better contact the auxiliary moving contact 33, and ensure that the auxiliary static contact 34 and the auxiliary moving contact 33 can be better electrically connected, and the elastic force of the auxiliary moving contact 33 provides a counterforce for the separation of the auxiliary static contact 34 and the auxiliary moving contact 33. Because the auxiliary moving contact 33 has elasticity, in the process of contacting the auxiliary static contact 34, the auxiliary moving contact 33 can also play a buffering role, avoiding damage to the auxiliary static contact 34 and the auxiliary moving contact 33, and prolonging the service life of the auxiliary static contact 34 and the auxiliary moving contact 33. The auxiliary moving contact 33 can realize the on-off of the auxiliary switch assembly, without the need to separately set spring and moving contact parts, reducing the assembly of parts and improving the assembly efficiency. Because the auxiliary moving contact 33 includes the cover body 333, that is, the auxiliary moving contact 33 is a cover type, one circle of the cover type auxiliary moving contact 33 can contact the auxiliary static contact 34, so that the reliability of the contact between the auxiliary static contact 34 and the auxiliary moving contact 33 can be ensured even if there is an assembly error of the auxiliary moving contact 33.

[0115] In one embodiment, referring to Figure 14 and Figure 17 the cover body 333 is provided with a hollow cavity 3331 and a third opening 3332 in communication with the hollow cavity 3331, and the cover body 333 is sleeved on the second end 52 through the third opening 3332. In this way, the installation of the auxiliary moving contact 33 is facilitated, and the installation efficiency is improved.

[0116] In one embodiment, referring to Figure 14 and Figure 17 the third opening 3332 is arranged on the side of the cover body 333 facing the first end 51.

[0117] Further, the cover body 333 is also provided with a fourth opening 3333 in communication with the hollow cavity 3331, and the fourth opening 3333 is arranged on the side of the cover body 333 away from the first end 51. In this way, the fourth opening 3333 can play a role of accommodating the push rod 50.

[0118] In one embodiment, referring to Figure 14 and Figure 17The auxiliary moving contact piece 33 further comprises a flange 334. The flange 334 extends outwards from the wall of the fourth opening 3333 towards the hollow cavity 3331, or the flange 334 extends inwards from the wall of the fourth opening 3333 towards the hollow cavity 3331. Under the pushing of the pushing rod 50, the auxiliary static contact head 34 contacts or separates from the flange 334. In the process of contacting, the flange 334 is deformed under the pressing of the auxiliary static contact head 34 to generate elastic force, so as to increase the contact pressure between the auxiliary static contact head 34 and the auxiliary moving contact piece 33, so that the auxiliary static contact head 34 can better contact the flange 334, and the electrical connection between the auxiliary static contact head 34 and the auxiliary moving contact piece 33 is ensured, and the elastic force of the flange 334 provides counterforce for the separation of the auxiliary static contact head 34 and the auxiliary moving contact piece 33. In this way, any position of the circumference of the flange 334 can contact the auxiliary static contact head 34, and the reliability of the contact between the auxiliary static contact head 34 and the auxiliary moving contact piece 33 can be ensured even if there is an assembly error of the auxiliary moving contact piece 33.

[0119] Of course, in other embodiments, under the action of the pushing rod 50, the auxiliary static contact head 34 contacts or separates from the inner wall of the cover body 333 through the fourth opening 3333. In this way, any position of the circumference of the inner wall of the cover body 333 can contact the auxiliary static contact head 34, and the reliability of the contact between the auxiliary static contact head 34 and the auxiliary moving contact piece 33 can be ensured even if there is an assembly error of the auxiliary moving contact piece 33.

[0120] Further, referring to Figure 14 , the auxiliary static contact head 34 contacts or separates from the side of the flange 334 close to the cover body 333. Since the cover body 333 supports the side of the flange 334 close to the cover body 333, when the auxiliary static contact head 34 contacts the auxiliary moving contact piece 33, the deformation amount of the side of the flange 334 close to the cover body 333 is moderate, and the electrical connection between the auxiliary static contact head 34 and the auxiliary static contact head 34 is ensured.

[0121] In one embodiment, referring to Figure 14 and Figure 17 , the cover body 333 is semispherical, and the semispherical cover body 333 is concave in the direction away from the auxiliary static contact head 34 along the axial direction of the pushing rod 50.

[0122] Of course, in other embodiments, the cover body 333 can also be semispherical and cylindrical, etc. Alternatively, the cross section of the cover body 333 is trapezoidal.

[0123] In one embodiment, the second end 52 is provided with a first limiting structure and a second limiting structure. The first limiting structure is arranged on the side of the auxiliary movable contact 33 away from the auxiliary stationary contact 34, and the second limiting structure is arranged in the hollow cavity 3331. The first limiting structure and the second limiting structure cooperate to arrange the auxiliary movable contact 33 on the second end 52. Since the auxiliary movable contact 33 is sleeved on the second end 52 of the push rod 50, the first limiting structure and the second limiting structure are arranged on the second end 52 of the push rod 50, the auxiliary movable contact 33 is arranged between the first limiting structure and the second limiting structure, the first limiting structure limits the movement of the auxiliary movable contact 33 away from the auxiliary stationary contact 34, and the second limiting structure limits the movement of the auxiliary movable contact 33 towards the auxiliary stationary contact 34. Thus, under the cooperation of the first limiting structure and the second limiting structure, the auxiliary movable contact 33 is limited on the second end 52 of the push rod 50, so as to ensure that the auxiliary movable contact 33 can contact the auxiliary stationary contact 34, and at the same time, the auxiliary movable contact 33 is prevented from being separated from the push rod 50.

[0124] In one embodiment, referring to Figure 14 and Figure 17 , the opening wall of the third opening 3332 is matched with the first step surface 521, and the end of the cover 333 away from the flange 334 abuts against the second step surface 522. During installation, the auxiliary movable contact 33 is sleeved on the first step surface 521, and the first step surface 521 provides an installation position for the auxiliary movable contact 33, thereby facilitating the installation of the auxiliary movable contact 33. At the same time, the end of the cover 333 away from the flange 334 abuts against the second step surface 522, and the second step surface 522 plays a limiting role. The second step surface 522 can limit the movement of the auxiliary movable contact 33 away from the auxiliary stationary contact 34 relative to the push rod 50, thereby ensuring the reliability of the installation of the auxiliary movable contact 33.

[0125] In one embodiment, referring to Figure 14 and Figure 17 , the second limiting structure includes a fixing member 36. The fixing member 36 is provided with a fourth through hole 361, the fixing member 36 is sleeved on the second end 52 through the fourth through hole 361, and the fixing member 36 is fixedly connected with the second end 52. By arranging the fixing member 36, the fixing member 36 can limit the movement of the auxiliary movable contact 33 towards the auxiliary stationary contact 34 relative to the push rod 50, thereby preventing the auxiliary movable contact 33 from being separated from the second end 52, and improving the reliability of the installation of the auxiliary movable contact 33.

[0126] It should be noted that there are various ways to fixedly connect the fixing member 36 with the push rod 50. Alternatively, the hole wall of the fourth through hole 361 is snap-fitted with the push rod 50; or the hole wall of the fourth through hole 361 is welded with the push rod 50; or the fixing member 36 is riveted with the push rod 50.

[0127] Further, the length of the fixing member 36 is greater than the length of the third opening 3332. In this way, the fixing member 36 can limit the movement of the auxiliary movable contact 33 relative to the push rod 50 towards the auxiliary stationary contact 34, prevent the auxiliary movable contact 33 from being separated from the second end 52, and improve the installation reliability of the auxiliary movable contact 33.

[0128] In this embodiment, referring to Figure 14 and Figure 17 , the third opening 3332 is a circular hole, and the fixing member 36 is a gasket, and the diameter of the gasket is greater than the diameter of the circular hole.

[0129] In one embodiment, referring to Figure 6 and Figure 8 , the hole wall of the fourth through hole 361 is matched with the third step surface 523, and the side of the fixing member 36 away from the auxiliary stationary contact 34 abuts against the fourth step surface 524. During installation, the fixing member 36 is sleeved on the third step surface 523, and the third step surface 523 provides an installation position for the fixing member 36, facilitating the installation of the fixing member 36. Meanwhile, the fixing member 36 abuts against the fourth step surface 524, and the fourth step surface 524 functions as a limiting part to prevent the fixing member 36 from moving relative to the push rod 50 away from the auxiliary stationary contact 34, thereby ensuring the installation reliability of the fixing member 36.

[0130] In the description of the present application, it should be understood that, if these terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” appear, these terms indicate the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0131] In addition, if these terms “first”, “second” appear, these terms are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by “first”, “second” can explicitly or implicitly include at least one of the features. In the description of the present application, if the term “multiple” appears, the meaning of “multiple” is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0132] In this application, unless otherwise clearly indicated and limited, if there are terms such as "mount", "connect", "connect", "fix", etc., these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0133] In this application, unless otherwise clearly indicated and limited, if there are terms such as "mount", "connect", "connect", "fix", etc., these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0134] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation.

[0135] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combination of the technical features does not exist Contradiction, it should be considered within the scope of the present application.

[0136] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the patent of the present application should be subject to the appended claims.

Claims

1. A direct-acting relay, characterized by comprising: The direct-acting relay comprises: a housing having a receiving cavity and a first side; a magnetic circuit part arranged in the receiving cavity, the magnetic circuit part comprising a coil holder around which a coil is arranged; a push rod capable of moving along its axial direction under the drive of the magnetic circuit part; a contact part arranged in the receiving cavity, the contact part comprising a main active contact, a main static contact, an auxiliary active contact and an auxiliary static contact, the main active contact and the auxiliary active contact being capable of moving synchronously with the push rod, the main active contact being capable of contacting or separating from the main static contact under the push of the push rod, and the auxiliary active contact being capable of contacting or separating from the auxiliary static contact; and a lead-out part comprising a main lead-out piece, an auxiliary lead-out piece and a coil lead-out piece, the main lead-out piece, the auxiliary lead-out piece and the coil lead-out piece each having a connecting end located in the receiving cavity and a mounting end located outside the housing, the connecting end of the main lead-out piece being connected with the main static contact, the connecting end of the auxiliary lead-out piece being connected with the auxiliary static contact, and the connecting end of the coil lead-out piece being connected with the coil, the mounting end of the main lead-out piece, the mounting end of the auxiliary lead-out piece and the mounting end of the coil lead-out piece all being located on the side of the first side away from the receiving cavity.

2. The direct-acting relay according to claim 1, characterized by The direct-acting relay further comprises a yoke plate and an insulating cover, the yoke plate being arranged at one end of the coil holder along the axial direction of the push rod, the yoke plate being provided with a through hole through which the push rod passes and is capable of moving along its axial direction, the insulating cover being arranged on the side of the yoke plate away from the coil holder, the mounting end of the main lead-out piece being arranged on the side of the yoke plate towards the insulating cover, and the mounting end of the auxiliary lead-out piece and the mounting end of the coil lead-out piece being arranged in a first direction away from the mounting end of the main lead-out piece.

3. The direct-acting relay according to claim 2, characterized in that The mounting end of the auxiliary lead-out piece is arranged on the side of the mounting end of the coil lead-out piece away from the mounting end of the main lead-out piece, or the mounting end of the auxiliary lead-out piece is arranged between the mounting end of the main lead-out piece and the mounting end of the coil lead-out piece.

4. The direct-acting relay according to claim 1, characterized by The first side is provided with a first through hole, a second through hole and a third through hole, the first through hole, the second through hole and the third through hole all being in communication with the receiving cavity, the first through hole, the second through hole and the third through hole being arranged in a first direction in sequence and in a spaced manner, the main lead-out piece being arranged in the first through hole, the coil lead-out piece being arranged in the second through hole, and the auxiliary lead-out piece being arranged in the third through hole.

5. The direct-acting relay according to claim 4, characterized in that The first through hole and the third through hole are respectively located at the two ends of the first side along the first direction, and the second through hole is located at the middle of the first side along the first direction.

6. The direct-acting relay according to claim 4, wherein The first through holes, the second through holes and the third through holes are provided with at least two, all the first through holes are arranged in parallel with the second direction, all the second through holes are arranged in parallel with the second direction, and all the third through holes are arranged in parallel with the second direction; The main lead-out pieces, the coil lead-out pieces and the auxiliary lead-out pieces are provided with at least two, all the main lead-out pieces are arranged in the first through holes one by one, all the coil lead-out pieces are arranged in the second through holes one by one, and all the auxiliary lead-out pieces are arranged in the third through holes one by one, so that the arrangement directions of the main lead-out pieces, the coil lead-out pieces and the auxiliary lead-out pieces are parallel to each other.

7. The direct-acting relay according to claim 6, characterized in that The mounting ends of the main lead-out pieces, the mounting ends of the coil lead-out pieces and the mounting ends of the auxiliary lead-out pieces are parallel to each other.

8. The direct-acting relay according to claim 1, characterized by The push rod has a first end and a second end, the first end and the second end are axial ends of the push rod, the first end is arranged outside the coil frame, and the second end is arranged inside the coil frame. The active contact piece is connected to the first end, the main static contact is arranged on a side of the active contact piece away from the second end, the auxiliary active contact piece is arranged on the second end, the auxiliary static contact is arranged on a side of the auxiliary active contact piece away from the first end, and the magnetic circuit part is arranged between the main static contact and the auxiliary static contact.

9. The direct-acting relay according to claim 8, characterized in that The direct-acting relay further comprises a fixing frame arranged in the accommodating cavity and located on a side of the auxiliary static contact away from the push rod, and the auxiliary lead-out piece is fixedly connected to the fixing frame.

10. The direct-acting relay according to claim 8, characterized in that The direct-acting relay further comprises a metal cover arranged in the coil frame, the metal cover is provided with a receiving cavity and a through hole in communication with the receiving cavity, the second end and the auxiliary active contact piece are movably arranged in the receiving cavity, one end of the auxiliary static contact is arranged outside the metal cover, and the other end of the auxiliary static contact is arranged in the receiving cavity through the through hole.

11. The direct-acting relay according to claim 10, characterized in that The through hole is arranged on an end face of the metal cover in the axial direction of the push rod and close to the first end; The direct-acting relay further comprises an insulating piece, and the auxiliary static contact is insulatively connected to the metal cover through the insulating piece.

12. The direct-acting relay according to claim 11, characterized in that The auxiliary static contact is provided with a limiting boss, the limiting boss is arranged outside the metal cover, the insulating piece is arranged between the metal cover and the limiting boss, and the insulating piece is fixedly connected to the metal cover and the limiting boss.

13. The direct-acting relay according to any one of claims 1 to 12, characterized in that The main lead-out pieces, the coil lead-out pieces and the auxiliary lead-out pieces are in the form of a sheet.

14. The direct-acting relay according to any one of claims 1 to 12, characterized in that The auxiliary active contact piece is in the form of an elastic sheet.

15. The direct-acting relay according to any one of claims 1 to 12, characterized in that The magnetic circuit part further comprises a moving iron core, a static magnetic conducting member and an elastic return member, the moving iron core is movably arranged in the inner hole of the coil holder, the moving iron core is connected with the push rod, the static magnetic conducting member is located on the side of the moving iron core away from the auxiliary static contact, one end of the elastic return member is connected with the static magnetic conducting member, the other end of the elastic return member is connected with the moving iron core, and the elastic return member can stretch and contract along the axial direction of the push rod.

16. The direct-acting relay according to any one of claims 1 to 12, characterized in that The main static contact and the auxiliary static contact are each provided with at least two, under the pushing of the push rod, all the main static contacts are in contact with or separated from the main active contact piece, and all the auxiliary static contacts are in contact with or separated from the auxiliary active contact piece.

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