relay

Abstract

To provide a relay in which a movable contactor can avoid rotating with respect to a push rod assembly.SOLUTION: The present invention discloses a relay including a movable contactor assembly, a push rod assembly, a position limiting assembly, and an elastic assembly. The movable contactor assembly includes a movable contactor, the push rod assembly is used to push and move the movable contactor assembly to contact or separate the movable contactor from a fixed contact pull-out end, the position limiting assembly is connected to the movable contactor assembly and the push rod assembly to limit rotation of the movable contactor assembly about the axis of the push rod assembly relative to the push rod assembly, and the position limiting assembly can be deformed to adapt to overtravel, and the elastic assembly is intended to provide contact pressure.SELECTED DRAWING: Figure 6

Description

Technical Field

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[0001] The present invention relates to the technical field of electronic control devices, and particularly relates to relays.

Background Art

[0002] A relay is an electronic control device that has a control system (also called an input circuit) and a controlled system (also called an output circuit), and is usually applied to an automatic control circuit. A relay is actually an "automatic switch" that controls a large current with a small current. Therefore, it plays roles such as automatic adjustment, safety protection, and circuit conversion in the circuit.

[0003] A high-voltage DC relay is a type of relay. The high-voltage DC relay in the prior art includes a pair of fixed contact terminals and a movable assembly. The movable assembly includes a movable contact and a push rod assembly. The movable contact is attached to the push rod assembly via an elastic assembly. In the over-travel stage, the movable contact is contacted with the pair of fixed contact terminals, the push rod assembly continues to move upward, and the elastic assembly is compressed to form a contact pressure.

[0004] However, the movable contact of the high-voltage DC relay in the prior art is prone to rotate with respect to the push rod assembly. As a result, the movable contact is excessively deflected, the contact position between the movable contact and the fixed contact does not match, the contact resistance becomes unstable, and the reliability of the relay is affected. <00000​​​​​​​​​​​​​A push rod assembly for pushing and moving the movable contact assembly so as to bring the movable contact into contact with or separate from the fixed contact lead end, A position limiting assembly connected to the movable contact assembly and the push rod assembly, for restricting the movable contact assembly from rotating relative to the push rod assembly around the axis of the push rod assembly, Includes an elastic assembly for providing contact pressure.

[0007] In some embodiments of the present invention, the position limiting assembly can be deformed to accommodate overtravel.

[0008] In some embodiments of the present invention, the elastic assembly is a first elastic spring piece, The first elastic spring piece is connected to one of the push rod assembly and the movable contact assembly, and abuts against the other of the push rod assembly and the movable contact assembly.

[0009] In some embodiments of the present invention, the first elastic spring piece together with the movable contact assembly forms a housing chamber, and the position limiting assembly is housed within the housing chamber.

[0010] In some embodiments of the present invention, the relay further includes a pair of fixed contact leads, and both ends of the movable contact in a first direction are for contacting or separating from the pair of fixed contact leads, where the first direction is the direction in which the pair of fixed contact leads are arranged. The first elastic spring piece includes a first base and a spring arm, the first base being connected to the push rod assembly via a first anti-rotation structure, and at least one of the spring arms being provided at both ends of the first base in the first direction. The spring arms at both ends of the first base in the first direction are in contact with both ends of the movable contactor in the first direction, respectively.

[0011] In some embodiments of the present invention, the spring arm includes an extension and a contact portion, the extension being connected to the first base, and the contact portion being connected to one end of the extension away from the first base and in contact with the end of the movable contact in the first direction, wherein the width of the end of the extension connected to the first base is greater than the width of the end of the extension connected to the contact portion.

[0012] In some embodiments of the present invention, the width of the extension gradually decreases from the first base toward the contact portion.

[0013] In some embodiments of the present invention, the first anti-rotation structure is: The push rod assembly and at least two first position limiting protrusions provided on one of the first bases, The push rod assembly includes at least two first position limiting holes provided on the other side of the first base, wherein the at least two first position limiting projections are each inserted into the at least two first position limiting holes.

[0014] In some embodiments of the present invention, the position limiting assembly is a second elastic spring piece, the second elastic spring piece is connected to one of the elastic assembly and the movable contact assembly via a second anti-rotation structure, and to the other of the elastic assembly and the movable contact assembly via a third anti-rotation structure.

[0015] In some embodiments of the present invention, the second anti-rotation structure is The elastic assembly and at least two second position-limiting protrusions provided on one of the second elastic spring pieces, The elastic assembly includes at least two second position-limiting holes provided on the other side of the second elastic spring piece, wherein the at least two second position-limiting projections are each inserted into the at least two second position-limiting holes.

[0016] In some embodiments of the present invention, the elastic assembly is connected to the push rod assembly via a first anti-rotation structure, the first anti-rotation structure includes at least two first position-limiting projections and at least two first position-limiting holes, the at least two first position-limiting projections being provided on the push rod assembly and the at least two first position-limiting holes being provided on the elastic assembly, the at least two first position-limiting projections being inserted into at least two of the position-limiting holes respectively. Each of the second position-limiting protrusions is a convex ring, one of the convex rings surrounds one of the first position-limiting holes, and the inner circumferential surface of the convex ring is flush with the hole wall of the first position-limiting hole.

[0017] In some embodiments of the present invention, the convex ring is formed by bending the edge of the first position limiting hole of the elastic assembly toward the movable contact assembly.

[0018] In some embodiments of the present invention, the relay further includes a pair of fixed contact leads, the two ends of the movable contact in a first direction being for contacting or separating from the pair of fixed contact leads, where the first direction is the direction in which the pair of fixed contact leads are arranged. The second elastic spring piece includes a second base, a deformable portion, and a connecting portion. The second base is connected to one of the elastic assembly and the movable contact assembly via the second anti-rotation structure, and both sides of the second base in the first direction are provided with the deformable portion and the connecting portion, the second base is connected to the connecting portion via the deformable portion, and the connecting portion is connected to the other of the elastic assembly and the movable contact assembly via the third anti-rotation structure.

[0019] In some embodiments of the present invention, along the first direction, the connecting portion on one side of the second base forms a first connection point with the movable contact assembly, and the connecting portion on the other side of the second base forms a second connection point with the movable contact assembly. There is a first distance between the first connection point and the second connection point, and there is a second distance between the deformation portions on both sides of the second base. The first distance is smaller than the second distance. Here, the second distance is the largest interval between the deformation portions on both sides of the second base.

[0020] In some embodiments of the present invention, the third anti-rotation structure is at least two third position-limiting protrusions provided on one of the second elastic spring pieces and the movable contact assembly, and at least two third position-limiting holes provided on the other of the second elastic spring pieces and the movable contact assembly. The at least two third position-limiting protrusions are respectively inserted into the at least two third position-limiting holes.

[0021] In some embodiments of the present invention, the relay further includes a first magnetic conductor, The first magnetic conductor is provided on the side facing the fixed contact lead-out end of the movable contact assembly and is for resisting the electric repulsive force.

[0022] In some embodiments of the present invention, the movable contact assembly further includes a second magnetic conductor. The second magnetic conductor is fixedly connected to the side (the back side) facing away from the fixed contact lead-out end of the movable contact. The second magnetic conductor is for forming a magnetic circuit with the first magnetic conductor.

[0023] In some embodiments according to the present invention, the relay further includes a pair of fixed contact leads, and both ends of the movable contact in the first direction are for contacting or separating from the pair of fixed contact leads respectively, where the first direction is the arrangement direction of the pair of fixed contact leads. The position limiting assembly is a second elastic spring piece, and the second elastic spring piece includes a second base portion, a deformation portion and a connection portion. Both sides of the second base portion in the first direction are provided with the deformation portion and the connection portion respectively. The second base portion is connected to the connection portion through the deformation portion, and the second base portion is connected to the elastic assembly. The connection portions on both sides of the second base portion are respectively inserted between the second magnetic conductor and the movable contact from both sides along the first direction of the second magnetic conductor, and are fixedly connected to the movable contact and the second magnetic conductor.

[0024] The elastic assembly is a first elastic spring piece, the position limiting assembly is a second elastic spring piece, and the thickness of the second elastic spring piece is smaller than the thickness of the first elastic spring piece.

[0025] In some embodiments according to the present invention, the elastic assembly is a compression spring, and the compression spring is for providing contact pressure.

[0026] In some embodiments according to the present invention, one end of the compression spring abuts against the position limiting assembly, and the other end of the compression spring abuts against the movable contact assembly or the push rod assembly.

[0027] In some embodiments according to the present invention, the position limiting assembly is a second elastic spring piece. The second elastic spring piece includes a second base, a deformable portion, and a connecting portion, the second base being connected to the push rod assembly, both sides of the second base in the first direction being provided with the deformable portion and the connecting portion, the second base being connected to the connecting portion via the deformable portion, and the connecting portion being connected to the movable contact assembly, where the first direction is the direction in which the pair of fixed contact lead-out ends are arranged. The second elastic spring piece and the movable contact assembly are surrounded to form a chamber, the compression spring is housed within the chamber, one end of the compression spring abuts against the second base, and the other end of the compression spring abuts against the movable contact assembly.

[0028] In some embodiments of the present invention, the relay further includes a pair of fixed contact leads, the two ends of the movable contact in a first direction being for contacting or separating from the pair of fixed contact leads, where the first direction is the direction in which the pair of fixed contact leads are arranged. The elastic assembly and the push rod assembly are connected in a position-restrictive manner along the first direction, and / or the position-restrictive assembly and the movable contact assembly are connected in a position-restrictive manner along the first direction, and / or the position-restrictive assembly and the elastic assembly are connected in a position-restrictive manner along the first direction.

[0029] In some embodiments of the present invention, the push rod assembly includes a contact bracket, the movable contact assembly includes one or more movable contacts, and the movable contact assembly is mounted within the contact bracket by the elastic assembly.

[0030] One embodiment of the above invention has at least the following advantages or beneficial effects.

[0031] An embodiment of the present invention includes a movable contact assembly, a push rod, a position limiting assembly, and an elastic assembly, wherein the elastic assembly can provide contact pressure, and the position limiting assembly can restrict the movable contact assembly from rotating relative to the push rod assembly around the axis of the push rod assembly, thereby ensuring the consistency of the contact positions of the movable contact and the fixed contact, enhancing the stability of the contact resistance, and improving the reliability of the relay. [Brief explanation of the drawing]

[0032] [Figure 1] This is a schematic diagram of a relay according to the first exemplary embodiment. [Figure 2] This is a cross-sectional view along line AA in Figure 1. [Figure 3] This is a cross-sectional view along line BB in Figure 1. [Figure 4] This is a schematic diagram of a movable assembly and a second magnetic conductor according to an exemplary embodiment. [Figure 5] Figure 4 is a schematic diagram of the exploded view. [Figure 6] Figure 4 is a schematic diagram showing the configuration with the contact bracket omitted, where the movable contact is not yet in contact with the fixed contact lead-out end. [Figure 7] This is a schematic diagram of a first elastic spring piece according to an exemplary embodiment. [Figure 8] This is a schematic diagram of a second elastic spring piece according to an exemplary embodiment. [Figure 9] Figure 4 is a cross-sectional view along the CC line. [Figure 10] This is a magnified view of area X in Figure 9. [Figure 11] This is a schematic diagram of the movable assembly and two second magnetic conductors of a relay according to a second exemplary embodiment, in which the movable assembly omits the contact bracket. [Figure 12] This is an exploded schematic diagram of the movable assembly of the relay and the two second magnetic conductors according to a second exemplary embodiment. [Figure 13]This is a schematic diagram of a movable assembly and two second magnetic conductors according to a third exemplary embodiment, in which the movable assembly omits the contact bracket. [Figure 14] This is a cross-sectional view of Figure 13. [Figure 15] This is an exploded schematic diagram of a movable assembly and two second magnetic conductors according to a fourth exemplary embodiment. [Figure 16] This is an exploded schematic diagram of a movable assembly and two second magnetic conductors according to a fifth exemplary embodiment. [Figure 17] This is a schematic diagram of the movable assembly and two second magnetic conductors of a relay according to a sixth exemplary embodiment, in which the movable assembly omits the contact bracket. [Figure 18] Figure 4 is a schematic configuration diagram in which the contact bracket is omitted, and in this case, the movable contact is already in contact with the fixed contact lead end. [Modes for carrying out the invention]

[0033] Next, the exemplary embodiments will be described more generally with reference to the drawings. However, the exemplary embodiments can be carried out in various forms and should not be understood as being limited to the embodiments described herein. In contrast, these embodiments are provided to make the invention comprehensive and complete and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the figures indicate the same or similar structures, and their detailed description is omitted.

[0034] As shown in Figures 1 to 3, the relay according to an embodiment of the present invention includes a contact container 1000, a pair of fixed contact lead-out ends 2000, a movable assembly 3000, and a magnetic circuit section 4000.

[0035] It is understood that the terms “includes” and “has” in embodiments of the present invention, and any variations thereof, are intended to overlook non-exclusive inclusion. For example, a process, method, system, product, or device comprising a series of steps or units may optionally include steps or units not listed, or other steps or assemblies specific to those processes, methods, products, or devices, but are not limited to the listed steps or units.

[0036] The contact container 1000 is a fixed component, housing the contact set, and is a device mainly composed of a case with a chamber. Furthermore, the contact container 1000 may consist of multiple components connected by a predetermined assembly method.

[0037] The contact container 1000 has a contact chamber 1001 inside. The contact container 1000 may also include an insulating cover 1100 and a yoke plate 1200, the insulating cover 1100 being positioned to cover one side of the yoke plate 1200, and the insulating cover 1100 and the yoke plate 1200 together enclose the contact chamber 1001.

[0038] The insulating cover 1100 includes a ceramic cover 1110 and a flange member 1120. The ceramic cover 1110 is connected to the yoke plate 1200 via the flange member 1120. The flange member 1120 may be a metal part such as an iron-nickel alloy having a ring-shaped structure. One end of the flange member 1120 is connected to the opening edge of the ceramic cover 1110 by a method such as laser welding, brazing, resistance welding, or bonding. The other end of the flange member 1120 is similarly connected to the yoke plate 1200 by a method such as laser welding, brazing, resistance welding, or bonding. By providing the flange member 1120 between the ceramic cover 1110 and the yoke plate 1200, the connection between the ceramic cover 1110 and the yoke plate 1200 can be facilitated.

[0039] The contact container 1000 further has a pair of first through holes 1002, which communicate with the contact chamber 1001. The first through holes 1002 are configured such that a fixed contact lead end 2000 passes through them. In embodiments of the present invention, the first through holes 1002 are provided in the ceramic cover 1110.

[0040] A pair of fixed contact leads 2000 are connected to the ceramic cover 1110 of the contact container 1000, and at least a portion of each fixed contact lead 2000 is located within the contact chamber 1001. One of the pair of fixed contact leads 2000 functions as a current inflow terminal, and the other functions as a current outflow terminal.

[0041] A pair of fixed contact leads 2000 are drilled into a pair of first through holes 1002 and connected to the ceramic cover 1110 by welding or the like.

[0042] The bottom of the fixed contact lead-out end 2000 functions as a fixed contact, and the fixed contact may be integrally provided with the bottom of the fixed contact lead-out end 2000 or provided separately.

[0043] Continuing to refer to Figures 1 to 3, the movable assembly 3000 includes a movable contact assembly 3100, a push rod assembly 3200, and an elastic assembly 3230. The movable contact assembly 3100 is housed within an insulating cover 1100 and is attached to the push rod assembly 3200 via the elastic assembly 3230. Both ends of the movable contact assembly 3100 in a first direction D1 are for contacting or separating from a pair of fixed contact lead-out ends 2000. The first direction D1 is the orientation of the pair of fixed contact lead-out ends 2000.

[0044] The movable contact assembly 3100 includes a movable contact 3110, which may include a movable contact body and movable contacts provided at both ends of the movable contact body. The movable contacts may be separate parts connected to the movable contact body. Of course, the movable contacts may be integrally molded with the movable contact body.

[0045] The number of movable contacts 3110 included in the movable contact assembly 3100 is at least one, for example, one, two, three, etc. In embodiments of the present invention, the movable contact assembly 3100 includes two movable contacts 3110 arranged side by side. One end of the two movable contacts 3110 in a first direction D1 is for contacting or separating from a fixed contact of one fixed contact lead-out end 2000, and the other end of the two movable contacts 3110 in the first direction D1 is for contacting or separating from a fixed contact of the other fixed contact lead-out end 2000.

[0046] The movable contact assembly 3100 may further include a second magnetic conductor 6200, which is fixedly connected to the side of the movable contact 3110 facing away from the fixed contact lead-out end 2000 (the rear side). The function of the second magnetic conductor 6200 will be described later.

[0047] Here, the movable contact assembly 3100 includes a corresponding number of movable contacts 3110 and a second magnetic conductor 6200. Specifically, if there is one movable contact 3110, there is also one second magnetic conductor 6200, and if there are multiple movable contacts 3110 (including two), there are also multiple second magnetic conductors 6200. Each of the multiple second magnetic conductors 6200 is fixedly connected to the side of the multiple movable contacts 3110 that faces away from the fixed contact lead-out ends 2000.

[0048] Of course, in other embodiments, if there is one movable contact 3110, there may be multiple second magnetic conductors 6200. For example, at least one opening is provided in the center of the movable contact 3110, and two adjacent second magnetic conductors 6200 from among the multiple second magnetic conductors 6200 are inserted into one opening.

[0049] As shown in Figures 4 and 5, the direction of movement of the movable contact 3110 is defined as the second direction D2, and the direction perpendicular to the first direction D1 and the second direction D2 is defined as the third direction D3. The push rod assembly 3200 includes a push rod 3210, a contact bracket 3220, and an elastic assembly 3230. The contact bracket 3220 includes an upper wall 3221 and two side walls 3222, the two side walls 3222 being integrally connected to each side of the upper wall 3221 along the third direction D3, i.e., forming an inverted U-shaped bracket. The movable contact assembly 3100 is mounted inside the contact bracket 3220 via the elastic assembly 3230. The upper end of the push rod 3210 is connected to the lower ends of the two side walls 3222 of the contact bracket 3220.

[0050] Locking holes 3223 are provided at the lower ends of each side wall 3222 of the contact bracket 3220. The push rod 3210 includes a base 3211 and a rod portion 3212, the base 3211 being connected to one axial end of the rod portion 3212. Locking pieces 3213 are provided on both sides of the base 3211, and the base 3211 and the contact bracket 3220 are fixed together by the engagement of the two locking pieces 3213 into the two locking holes 3223 of the contact bracket 3220, respectively. The elastic assembly 3230 is provided between the movable contact assembly 3100 and the base 3211 and is configured to apply an elastic force to the movable contact assembly 3100 so as to provide contact pressure, moving toward the upper wall 3221. In embodiments of the present invention, one end of the elastic assembly 3230 abuts against the movable contact assembly 3100, and the other end of the elastic assembly 3230 is attached to the base 3211.

[0051] Of course, in other embodiments, the contact bracket 3220 may have other structures, which will not be listed here.

[0052] If there are multiple movable contacts 3110, the multiple movable contacts 3110 are arranged in a line along the third direction D3.

[0053] Returning to Figures 1 to 3, the yoke plate 1200 has a second through-hole 1210 that penetrates two opposing sides of the yoke plate 1200 along the thickness direction of the yoke plate 1200, and the second through-hole 1210 communicates with the contact chamber 1001 of the contact container 1000. The rod portion 3212 is drilled in the second through-hole 1210 so as to be movable along the axial direction. The base 3211 at one end of the rod portion 3212 in the axial direction is provided inside the contact chamber 1001.

[0054] The relay further includes a metal cover 5000, which is connected to the side of the yoke plate 1200 facing away from the insulating cover 1100, and the metal cover 5000 is provided to cover a second through-hole 1210 in the yoke plate 1200. Together with the yoke plate 1200, the metal cover 5000 forms a chamber for housing the fixed core 4300 and the movable core 4400 of the magnetic circuit section 4000.

[0055] The magnetic circuit section 4000 includes a coil bobbin 4100, a coil 4200, a fixed core 4300, a movable core 4400, and a reset member 4500. The coil bobbin 4100 is formed in a hollow cylindrical shape and is made of an insulating material. A metal cover 5000 is drilled into the coil bobbin 4100. The coil 4200 surrounds the coil bobbin 4100. The fixed core 4300 is fixedly installed inside the metal cover 5000, and a portion of the fixed core 4300 fits into the second through hole 1210. The fixed core 4300 has a through hole 4410, which is installed corresponding to the position of the second through hole 1210, and is configured so that the rod section 3212 drills through it. The movable core 4400 is movably housed within the metal cover 5000 and is positioned opposite the fixed core 4300 along the axial direction of the rod portion 3212. The movable core 4400 is connected to the rod portion 3212 and is configured to be attracted to the fixed core 4300 when the coil 4200 is energized. The movable core 4400 and the rod portion 3212 may be connected by screwing, crimping, welding, or other methods.

[0056] The reset member 4500 is located inside the metal cover 5000 and is provided between the fixed core 4300 and the movable core 4400. It is configured to reset the movable core 4400 when the power supply to the coil 4200 is cut off. The reset member 4500 may be a spring and is fitted onto the rod portion 3212.

[0057] When the coil 4200 is energized, the magnetic circuit section 4000 can drive the rod section 3212 to push the push rod assembly 3200 upward. When the movable contact 3110 contacts the fixed contact lead-out end 2000, the movable contact 3110 is stopped by the fixed contact lead-out end 2000, while the rod section 3212 and base 3211 continue to move upward until overtravel is complete.

[0058] As shown in Figures 2 to 4, the relay according to an embodiment of the present invention further includes a first magnetic conductor 6100. The movable contact 3110 has a first side and a second side that are opposite each other along a second direction D2. Here, the first side is the side facing the fixed contact lead-out end 2000, and the second side is the side facing away from the fixed contact lead-out end 2000. The first magnetic conductor 6100 is provided on the first side of the movable contact 3110 and is provided in the contact chamber 1001.

[0059] If the movable contact assembly 3100 includes only the movable contact 3110 and does not include the second conductor 6200, when the movable contact 3110 is energized, the first conductor 6100 is magnetized, thereby forming an attractive force on the movable contact 3110 in the contact closing direction. This attractive force can resist the electrical repulsion force generated by the short-circuit current between the movable contact 3110 and the fixed contact lead-out end 2000, preventing the movable contact 3110 from bouncing away from the fixed contact lead-out end 2000, thus achieving the objective of short-circuit protection.

[0060] If the movable contact assembly 3100 includes a movable contact 3110 and a second magnetic conductor 6200, the second magnetic conductor 6200 is fixedly connected to the movable contact 3110, and the second magnetic conductor 6200 forms a magnetic circuit with the first magnetic conductor 6100.

[0061] When both ends of the movable contact 3110 come into contact with the pair of fixed contact lead-outs 2000, the second magnetic conductor 6200, which moves together with the movable contact 3110, approaches or comes into contact with the first magnetic conductor 6100, thereby forming a magnetic circuit surrounding the movable contact 3110 between the first magnetic conductor 6100 and the second magnetic conductor 6200. When a short-circuit current flows through the movable contact 3110, a magnetic attractive force in the direction of the contact pressure is generated between the first magnetic conductor 6100 and the second magnetic conductor 6200. This magnetic attractive force can resist the electrical repulsion force generated by the short-circuit current between the movable contact 3110 and the fixed contact lead-outs 2000, ensuring that the movable contact 3110 does not bounce away from the fixed contact lead-outs 2000.

[0062] The second magnetic conductor 6200 and the movable contact 3110 may, but are not limited to, be fixedly connected by crimping.

[0063] The first magnetic conductor 6100 and the second magnetic conductor 6200 may both be straight or U-shaped, and the first magnetic conductor 6100 and the second magnetic conductor 6200 may be made of a magnetically conductive material such as iron, cobalt, nickel, or an alloy thereof.

[0064] Here, if the movable contact assembly 3100 includes a plurality of movable contacts 3110 arranged side by side, the number of first conductors 6100 may be multiple, the number of first conductors 6100 corresponding to the number of movable contacts 3110, and the plurality of first conductors 6100 are each located on the side of the plurality of movable contacts 3110 facing the fixed contact lead-out end 2000.

[0065] Of course, in other embodiments, if the movable contact assembly 3100 includes a plurality of movable contacts 3110 arranged side by side, the number of first magnetic conductors 6100 may be one, and this first magnetic conductor 6100 straddles the plurality of movable contacts 3110 in the third direction D3.

[0066] The first magnetic conductor 6100 may be connected to the contact container 1000 via two connecting members 6300. One end of the two connecting members 6300 is connected to the contact container 1000, and the other end of the two connecting members 6300 is connected to the first magnetic conductor 6100.

[0067] The first magnetic conductor 6100 is connected to the contact container 1000 via the connecting member 6300, thereby transferring the short-circuit-resistant magnetic attraction force to the contact container 1000. Since the contact container 1000 is a fixed component, it does not require excessive coil holding force. As a result, the power consumption of the relay coil is reduced, the relay can be miniaturized, and its short-circuit resistance is improved.

[0068] In one embodiment, the connecting member 6300 is rod-shaped, with one end in the axial direction fixedly connected to the ceramic cover 1110 of the insulating cover 1100, and the other end in the axial direction connected to the first magnetic conductor 6100.

[0069] In this embodiment of the present invention, a third through-hole 1111 is provided in the upper wall of the ceramic cover 1110 of the contact container 1000, and a connecting member 6300 is drilled into the third through-hole 1111. The method of connecting one axial end of the connecting member 6300 to the ceramic cover 1110 can have various embodiments, such as welding, crimping, screwing, or bonding. The method of connecting the other end of the connecting member 6300 to the first magnetic conductor 6100 can also have various embodiments, such as welding, crimping, screwing, bonding, or locking.

[0070] If the method of connecting one end of the connecting member 6300 to the ceramic cover 1110 is welding, it is understood that by welding the connecting member 6300 to the upper wall of the ceramic cover 1110, the metallized layer can be processed only around the periphery of the third through hole 1111 on the outer wall surface of the upper wall without processing the metallized layer on the inner wall surface of the upper wall, which is convenient for processing and simplifies the processing steps.

[0071] It is understood that one end of the connecting member 6300 may be connected to the outer wall surface of the ceramic cover 1110, or to the inner wall surface of the ceramic cover 1110, or to both the outer and inner wall surfaces of the ceramic cover 1110 simultaneously.

[0072] In this embodiment of the present invention, one end of the connecting member 6300 is connected to the periphery of the third through hole 1111 of the ceramic cover 1110.

[0073] From here, when the first magnetic conductor 6100 is connected to the ceramic cover 1110 via the connecting member 6300, the short-circuit-resistant magnetic attraction force is transferred to the ceramic cover 1110, so an excessive coil holding force is not required. As a result, the power consumption of the relay coil is reduced, the relay is miniaturized, and the short-circuit resistance is improved. At the same time, since the connecting member 6300 is connected to the ceramic cover 1110, it does not occupy too much space in the contact chamber 1001, thus ensuring space for arc extinguishing of the arc extinguishing assembly and space for the push rod to operate.

[0074] Furthermore, since the first magnetic conductor 6100 is connected to the rod-shaped connecting member 6300, various connection methods such as crimping, laser welding, bonding, and adhesive can be used between the first magnetic conductor 6100 and the connecting member 6300, thus enriching the connection methods.

[0075] For example, the connecting member 6300 is a solid rod. In this way, the connecting member 6300 and the first magnetic conductor 6100 can be connected by crimping, making the connection more secure. In addition, a solid rod has higher support strength and is less prone to deformation.

[0076] As shown in Figures 5, 6, and 18, the relay further includes a position limiting assembly 300, which is connected to a movable contact assembly 3100 and a pushrod assembly 3200, and is configured to restrict the movable contact assembly 3100 from rotating relative to the pushrod assembly 3200 around the axis of the pushrod assembly 3200, and the position limiting assembly 300 can be deformed to accommodate overtravel.

[0077] It is understood that the connection between the position limiting assembly 300 and the push rod assembly 3200 may be direct or indirect. When the position limiting assembly 300 and the push rod assembly 3200 are connected indirectly, the position limiting assembly 300 may be connected to the push rod assembly 3200 via the elastic assembly 3230. That is, the elastic assembly 3230 and the push rod assembly 3200 are directly connected, and the position limiting assembly 300 and the elastic assembly 3230 are directly connected.

[0078] An embodiment of the present invention includes a movable contact assembly 3100, a push rod 3210, a position limiting assembly 300, and an elastic assembly 3230. The elastic assembly 3230 can provide contact pressure, and the position limiting assembly 300 can restrict the movable contact assembly 3100 from rotating relative to the push rod 3210. In this way, the consistency of the contact positions of the movable and fixed contacts is ensured, the stability of the contact resistance is enhanced, and the reliability of the relay is improved.

[0079] In this embodiment of the present invention, the position limiting assembly 300 can restrict the movable contact assembly 3100 from rotating about an axis perpendicular to the plane on which the movable contact assembly 3100 is located. In other words, the position limiting assembly 300 can restrict the movable contact assembly 3100 from rotating about the axis of the push rod assembly 3200 relative to the push rod assembly 3200.

[0080] Furthermore, if there are multiple movable contact assemblies 3110, the rotation prevention function of the position limiting assembly 300 allows only one contact bracket 3220 to be used, thereby avoiding the increase in occupied space that would result from providing one contact bracket 3220 for each movable contact assembly 3110.

[0081] As shown in Figures 6 and 7, the elastic assembly 3230 is the first elastic spring piece 100. For example, the first elastic spring piece 100 is a piece-like structure made of a metal material and is formed by bending.

[0082] The first elastic spring piece 100 is attached to the base 3211 of the push rod 3210 by the first anti-rotation structure 200 and abuts against the side of the movable contact 3110 of the movable contact assembly 3100 that faces the push rod 3210.

[0083] The first elastic spring piece 100 is provided on the second side of the movable contact 3110 and includes a first base 110 and a spring arm 120. The first base 110 is attached to the push rod 3210 by a first anti-rotation structure 200, and at least one spring arm 120 is provided at each end of the first base 110 along a first direction D1, and the spring arms 120 at both ends of the first base 110 in the first direction D1 abut against the ends of the movable contact assembly 3100 in the first direction D1, respectively.

[0084] In embodiments of the present invention, the spring arms 120 at both ends of the first base 110 in the first direction D1 are in contact with both ends of the movable contact 3110, respectively.

[0085] Since the spring arms 120 at both ends of the first elastic spring piece 100 are supported at both ends of the movable contact 3110, the movable contact 3110 and the second magnetic conductor 6200 can be stably attached to the push rod 3210, and rattle of the movable contact 3110 and the second magnetic conductor 6200 can be avoided. It is understood that problems such as uneven contact pressure due to rattle of the movable contact 3110 and the impact of rattle of the second magnetic conductor 6200 on short-circuit resistance can be further avoided.

[0086] The first elastic spring piece 100 and the movable contact assembly 3100 together form a housing chamber 500, and the position limiting assembly 300 is housed within the housing chamber 500. By providing the position limiting assembly 300 within the housing chamber 500, the structure of the movable assembly 3000 can be made more compact, which is advantageous for miniaturizing the relay.

[0087] As shown in Figure 5, the first base portion 110 is provided with spring arms 120 at both ends in the first direction D1, arranged in a line along at least two third directions D3, and the two corresponding spring arms 120 of the first elastic spring piece 100 in the first direction D1 are in contact with the ends of one movable contact 3110 in the first direction D1, respectively.

[0088] In embodiments of the present invention, spring arms 120 are provided at both ends of the first base 110 in a first direction D1, arranged side by side along two third directions D3. The two spring arms 120 at one end of the first base 110 in the first direction D1 are in contact with one end of two side-by-side movable contacts 3110, and the two spring arms 120 at the other end of the first base 110 in the first direction D1 are in contact with the other ends of the two side-by-side movable contacts 3110.

[0089] From this, it can be seen that in the embodiments of the present invention, each movable contact 3110 corresponds to a pair of spring arms 120, and when the contact gaps between the multiple movable contacts 3110 and the fixed contact lead-out ends do not match, the multiple movable contacts 3110 do not interfere with each other.

[0090] As shown in Figure 7, each spring arm 120 includes an extension 121 and a contact portion 122. The extension 121 is connected to the first base 110, and the contact portion 122 is connected to one end of the extension 121 away from the first base 110 and contacts the end of the movable contact 3110 in a first direction D1. Here, the width of the end where the extension 121 is connected to the first base 110 is greater than the width of the end where the extension 121 is connected to the contact portion 122. Furthermore, the width of the extension 121 gradually decreases in the direction from the first base 110 towards the contact portion 122.

[0091] In embodiments of the present invention, the first elastic spring piece 100 includes a first base 110 and a spring arm 120, wherein the width of the extension 121 of the spring arm 120 gradually decreases from the first base 110 toward the contact portion 122, that is, the width of the extension 121 gradually narrows. This reduces the structural strength of the spring arm 120, making it more flexible. In the initial stage of overtravel, immediately after the movable contact 3110 contacts the fixed contact lead-out end 2000, the spring arm 120 does not provide excessive elastic force to avoid mismatch between attractive and reactive forces. Also, because the width of the extension 121 gradually narrows, the weight of the first elastic spring piece 100 can be slightly reduced. Furthermore, because the width of the extension 121 gradually changes, in the third direction D3, the spring arm 120 can pre-emptively secure sufficient space for installing other structures.

[0092] Furthermore, the width of the first base 110 is greater than the width of the extension 121. The first base 110 is connected to the push rod 3210, and because the width of the first base 110 is greater and the width of the extension 121 is also greater, the structural strength of the first base 110 of the first elastic spring piece 100 can be ensured, and the first elastic spring piece 100 can be firmly connected to the push rod 3210.

[0093] Furthermore, the base of the extension 121 is wider, resulting in better mechanical strength, which is advantageous for improving the fatigue resistance of the first elastic spring piece 100. The extension 121 is designed to gradually narrow so that the stiffness coefficient of the first elastic spring piece 100 changes nonlinearly, reducing the initial elastic reaction force and avoiding mismatch of the suction reaction force immediately after the start of overtravel. As the first elastic spring piece 100 is gradually compressed, its stiffness coefficient increases, ensuring that sufficient contact pressure can be provided.

[0094] As shown in Figures 5 to 7, the first anti-rotation structure 200 includes at least two first position-limiting protrusions 3214 and at least two first position-limiting holes 111. The first position-limiting protrusions 3214 are provided on one of the first base 110 and the push rod assembly 3200, and the first position-limiting holes 111 are provided on the other of the first base 110 and the push rod assembly 3200. At least two of the first position-limiting protrusions 3214 are respectively inserted into at least two of the first position-limiting holes 111 to achieve an anti-rotation effect.

[0095] In embodiments of the present invention, at least two first position-limiting protrusions 3214 are provided on the side of the push rod 3210 facing the movable contact assembly 3100, and at least two first position-limiting holes 111 are provided in the first base 110.

[0096] In embodiments of the present invention, the first anti-rotation structure 200 includes two first position-limiting projections 3214 and two first position-limiting holes 111. The two first position-limiting projections 3214 project from the side of the base 3211 facing the movable contact assembly 3100, and the two first position-limiting projections 3214 are arranged side by side along a third direction D3 and are respectively inserted into the two first position-limiting holes 111.

[0097] Furthermore, since the first anti-rotation structure 200 of the embodiment of the present invention includes at least two first position-limiting protrusions 3214 and a first position-limiting hole 111 that fit together with each other, the shape of the first position-limiting hole 111 may be circular.

[0098] Of course, in other embodiments, the first anti-rotation structure 200 may include one first position-limiting projection 3214 and one first position-limiting hole 111, and the shape of the first position-limiting hole 111 may be a non-circular shape such as a rectangle, ellipse, or triangle. The first position-limiting projection 3214 conforms to the shape of the first position-limiting hole 111 and is inserted into the first position-limiting hole 111, and has the effect of preventing relative rotation from occurring between the push rod 3210 and the first elastic spring piece 100.

[0099] It is understood that the first anti-rotation structure 200 is for restricting the first elastic spring piece 100 from rotating relative to the push rod assembly 3200 around the axis of the push rod assembly 3200.

[0100] In other embodiments, the first anti-rotation structure 200 may include a crimped structure, a welded structure, an adhesive structure, and the like. If the first anti-rotation structure 200 is a crimped structure, the first base 110 and the push rod assembly 3200 are crimped together; if the first anti-rotation structure 200 is a welded structure, the first base 110 and the push rod assembly 3200 are welded together; and if the first anti-rotation structure 200 is an adhesive structure, the first base 110 and the push rod assembly 3200 are adhesively bonded together.

[0101] In other embodiments, the first anti-rotation structure 200 may include fasteners for fastening and connecting the first elastic spring piece 100 and the push rod assembly 3200.

[0102] As shown in Figures 5, 6, and 8, the position limiting assembly 300 is a second elastic spring piece 300a, which is a piece-shaped structure made of a metal material and may be formed by bending. The second elastic spring piece 300a is connected to one of the elastic assembly 3230 and the movable contact assembly 3100 via a second anti-rotation structure 400, and to the other of the elastic assembly 3230 and the movable contact assembly 3100 via a third anti-rotation structure 700.

[0103] In embodiments of the present invention, the second elastic spring piece 300a is connected to the first base 110 via the second anti-rotation structure 400 and to the movable contact assembly 3100 via the third anti-rotation structure 700.

[0104] As shown in Figures 8 to 10, the second anti-rotation structure 400 includes at least two second position-limiting protrusions 410 and at least two second position-limiting holes 311. The second position-limiting protrusions 410 are provided on one of the first elastic spring piece 100 and the second elastic spring piece 300a, and the second position-limiting holes 311 are provided on the other of the first elastic spring piece 100 and the second elastic spring piece 300a.

[0105] In embodiments of the present invention, each second position-limiting projection 410 is a convex ring 112. At least two convex rings 112 are provided on the side of the first base 110 facing the movable contact assembly 3100, and one convex ring 112 surrounds one first position-limiting hole 111, with the inner circumferential surface 112b of the convex ring 112 being flush with the hole wall of the first position-limiting hole 111, and at least two second position-limiting holes 311 are provided on the second elastic spring piece 300a. Here, at least two convex rings 112 are inserted into at least two second position-limiting holes 311, respectively.

[0106] In embodiments of the present invention, the second anti-rotation structure 400 includes two convex rings 112 and two second position limiting holes 311.

[0107] In addition, since the second anti-rotation structure 400 in the embodiment of the present invention includes at least two convex rings 112 that fit together and a second position limiting hole 311, the shape of the second position limiting hole 311 may be circular.

[0108] Of course, in other embodiments, the second anti-rotation structure 400 may include one convex ring 112 and one second position limiting hole 311, and the shape of the second position limiting hole 311 may be a non-circular shape such as a rectangle, ellipse, or triangle. The convex ring 112 is inserted into the second position limiting hole 311 and has the effect of preventing relative rotation from occurring between the second elastic spring piece 300a and the first elastic spring piece 100.

[0109] It is understood that the second anti-rotation structure 400 is for restricting the second elastic spring piece 300a from rotating around the axis of the push rod assembly 3200 relative to the first elastic spring piece 100.

[0110] In one embodiment, the convex ring 112 is formed by bending the edge of the first position limiting hole 111 of the first base 110 toward the movable contact assembly 3100. In this embodiment of the present invention, by providing the convex ring 112 on the edge of the first position limiting hole 111, the frictional force between the first position limiting projection 3214 and the first base 110 can be reduced when assembling the first base 110 and the push rod 3210, thereby preventing the generation of scrap. At the same time, the convex ring 112 is fitted into the second position limiting hole 311 of the second elastic spring piece 300a, which also has the effect of preventing the second elastic spring piece 300a from rotating relative to the first elastic spring piece 100. Furthermore, the bent convex ring 112 can increase the contact area between the first position limiting projection 3214 and the first base 110, thereby reducing wear between the first position limiting projection 3214 and the first base 110 during movement.

[0111] As shown in Figure 10, the convex ring 112 is provided with an upper surface 112a facing away from the first base 110, and a chamfer 113 is provided at the connection point between the upper surface 112a and the inner circumferential surface 112b. By providing a chamfer 113 at the connection point between the upper surface 112a and the inner circumferential surface 112b, burrs generated when forming the convex ring 112 can be removed, and scrap generation between the first position limiting projection 3214 and the inner circumferential surface 112b of the convex ring 112 can be further prevented.

[0112] In other embodiments, the second anti-rotation structure 400 may include a crimped structure, a welded structure, an adhesive structure, and the like. When the second anti-rotation structure 400 is a crimped structure, the first elastic spring piece 100 and the second elastic spring piece 300a are crimped together; when the second anti-rotation structure 400 is a welded structure, the first elastic spring piece 100 and the second elastic spring piece 300a are welded together; and when the second anti-rotation structure 400 is an adhesive structure, the first elastic spring piece 100 and the second elastic spring piece 300a are bonded together.

[0113] In other embodiments, the second anti-rotation structure 400 may include fasteners for fastening and connecting the first elastic spring piece 100 and the second elastic spring piece 300a.

[0114] Returning to Figures 6 and 8, the second elastic spring piece 300a is provided on the second side of the movable contact assembly 3100. The second elastic spring piece 300a includes a second base 310, a deformable portion 320, and a connecting portion 330. The second base 310 is attached to one of the first elastic spring piece 100 and the movable contact assembly 3100 via a second anti-rotation structure 400. Both sides of the second base 310 along the first direction D1 are provided with a deformable portion 320 and a connecting portion 330, and the second base 310 is connected to the connecting portion 330 via the deformable portion 320, and the connecting portion 330 is connected to the other of the first elastic spring piece 100 and the movable contact assembly 3100 via a third anti-rotation structure 700.

[0115] In this embodiment of the present invention, the connecting portion 330 of the second elastic spring piece 300a is connected to the movable contact assembly 3100 via a third anti-rotation structure 700, and the second base portion 310 is attached to the first base portion 110 of the first elastic spring piece 100 via a second anti-rotation structure 400. In this way, the second elastic spring piece 300a can position the movable contact assembly 3100 in the second direction D2 and restrict the movable contact assembly 3100 in the first direction D1 and the third direction D3. The second elastic spring piece 300a provides restriction on the movable contact assembly 3100, preventing the movable contact assembly 3100 from rotating relative to the push rod 3210, and further avoiding the impact on the reliability of the relay due to the inability to align the movable contact and the fixed contact. Furthermore, the movable contact assembly 3100 is restricted by the second elastic spring piece 300a, and ripple noise (ripple noise) generated when the movable contact assembly 3100 contacts the contact bracket when the movable contact assembly 3100 is energized is suppressed. (Noise) was avoided.

[0116] Furthermore, since the movable contact assembly 3100 does not rotate, contact between the movable contact assembly 3100 and the side wall of the contact bracket 3220 can be reduced or prevented to some extent, thus avoiding the generation of large ripple noise (metallic friction noise). In addition, it avoids the problem of increased friction cycles, increased wear leading to a larger mating gap, and consequently, a larger deflection force and increased frictional resistance. Moreover, it reduces the amount of metal particles produced by mutual friction between the movable contact assembly 3100 and the contact bracket 3220, reducing the probability of metal particles falling onto the contact surface of the contact, and further reducing the quality risk of increased contact resistance and consequently loss of conductivity.

[0117] In this case, during overtravel, the push rod 3210 continues to move toward the movable contact assembly 3100, and at this time, the deformable portion 320 is compressed and deformed, and does not affect the overtravel.

[0118] Furthermore, since the first elastic spring piece 100 is for providing contact pressure and the second elastic spring piece 300a does not need to provide contact pressure, the thickness of the second elastic spring piece 300a may be smaller than the thickness of the first elastic spring piece 100. As a result, the stress at the bending point of the second elastic spring piece 300a can be reduced, and fatigue failure of the second elastic spring piece 300a can be avoided.

[0119] In embodiments of the present invention, both sides of the second base 310 are provided with two deformation portions 320 and two connection portions 330 along a first direction D1. One side of the second base 310 is connected to the two connection portions 330 via the two deformation portions 320. The two deformation portions 320 located on one side of the second base 310 are arranged side by side along a third direction D3. The two connection portions 330 located on one side of the second base 310 are fixedly connected to two movable contact assemblies 3100, respectively.

[0120] From this, it can be seen that in the embodiments of the present invention, each movable contact 3110 corresponds to a pair of connecting portions 330, and in this way, when the contact gaps between the multiple movable contacts 3110 and the fixed contact lead-out ends do not match, the multiple movable contacts 3110 do not interfere with each other.

[0121] As shown in Figure 6, along the first direction D1, one connection portion 330 of the second base 310 forms a first connection point 700a with the movable contact assembly 3100, and the other connection portion 330 of the second base 310 forms a second connection point 700b with the movable contact assembly 3100. There is a first distance L1 between the first connection point 700a and the second connection point 700b, and a second distance L2 between the deformable portions 320 on both sides of the second base 310, where the first distance L1 is smaller than the second distance L2. Here, the first distance L1 is the distance between the centerlines of the first connection point 700a and the centerline of the second connection point 700b, and the second distance L2 is the largest distance between the deformable portions 320 on both sides of the second base 310.

[0122] In embodiments of the present invention, since the first distance L1 is smaller than the second distance L2, during overtravel, the second elastic spring piece 300a is compressed by the push rod 3210 and the movable contact assembly 3100, allowing the deformable portions 320 on both sides of the second base 310 to deform in a direction away from each other (the deformable portions 320 on both sides spread outward), thus preventing the second elastic spring piece 300a from getting stuck and failing to provide contact pressure. Also, because the first distance L1 is smaller than the second distance L2, the deformable portions 320 on both sides of the second base 310 are equivalent to being bent in a direction toward each other as a whole, thus reducing the overall volume of the second elastic spring piece 300a and reducing its space occupancy.

[0123] Of course, in other embodiments, if the internal space of the relay is sufficiently large, the first distance L1 may be greater than the second distance L2.

[0124] As shown in Figures 6 and 8, the third anti-rotation structure 700 includes at least two third position-limiting protrusions 710 and at least two third position-limiting holes 720. The at least two third position-limiting protrusions 710 are provided on one of the second elastic spring piece 300a and the movable contact assembly 3100, and the at least two third position-limiting holes 720 are provided on the other of the second elastic spring piece 300a and the movable contact assembly 3100. The at least two third position-limiting protrusions 710 are respectively inserted into the at least two third position-limiting holes 720.

[0125] In this embodiment of the present invention, there are four third position limiting holes 720 and four third position limiting protrusions 710. The four third position limiting holes 720 are provided in each of the four connecting portions 330, and the four third position limiting protrusions 710 are provided in the two second magnetic conductors 6200, with each second magnetic conductor 6200 having two third position limiting protrusions 710.

[0126] In other embodiments, the third anti-rotation structure 700 may include a crimped structure, a welded structure, an adhesive structure, and the like. If the third anti-rotation structure 700 is a crimped structure, the second base 310 is crimped to the first elastic spring piece 100 or the movable contact assembly 3100; if the third anti-rotation structure 700 is a welded structure, the second base 310 is welded to the first elastic spring piece 100 or the movable contact assembly 3100; and if the third anti-rotation structure 700 is an adhesive structure, the second base 310 is adhesively bonded to the first elastic spring piece 100 or the movable contact assembly 3100.

[0127] In other embodiments, the third anti-rotation structure 700 may include a fastener for fastening one of the first elastic spring piece 100 and the movable contact assembly 3100 to the second elastic spring piece 300a.

[0128] In one embodiment, the elastic assembly 3230 and the push rod assembly 3200 are connected in a position-restrictive manner along a first direction D1, and / or the position-restrictive assembly 300 and the movable contact assembly 3100 are connected in a position-restrictive manner along a first direction D1, and / or the position-restrictive assembly 300 and the elastic assembly 3230 are connected in a position-restrictive manner along a first direction D1. In this way, the range of oscillation of the movable contact assembly 3100 relative to the push rod assembly 3200 in the first direction D1 can be reduced, and the shock resistance performance of the entire relay can be improved.

[0129] Preferably, the elastic assembly 3230 and the push rod assembly 3200 are connected in a position-restrictive manner along the first direction D1, the position-restrictive assembly 300 and the movable contact assembly 3100 are connected in a position-restrictive manner along the first direction D1, and the position-restrictive assembly 300 and the elastic assembly 3230 are connected in a position-restrictive manner along the first direction D1. In this way, when the relay encounters a large impact, no displacement occurs between the movable contact and the fixed contact, thus avoiding instability in contact resistance.

[0130] In other embodiments, the shape of the third position limiting hole 720 is elliptical, and the major axis of the ellipse is parallel to the first direction D1. By designing the third position limiting hole 720 to be elliptical, the third position limiting projection 710 is restricted to the outer edge of the third position limiting hole 720 before the movable contact and the fixed contact come into contact, preventing the movable contact assembly 3100 from swinging. After the movable contact and the fixed contact come into contact, the second elastic spring piece 300a is compressed, and the connecting and deformable portions on both sides of the second base 310 tend to move to either side. At this time, the elliptical third position limiting hole 720 provides space for the connecting portion 330 to move, releasing the stress generated inside the second elastic spring piece 300a after it has been compressed, and preventing excessive stress concentration inside the second elastic spring piece 300a from affecting its lifespan.

[0131] Furthermore, since the distance the connecting portion 330 moves within the ellipse is small, it does not affect the relative position of the movable contact and the fixed contact.

[0132] It is understood that the first anti-rotation structure 200, the second anti-rotation structure 400, and the third anti-rotation structure 700 may be the same or different.

[0133] As shown in Figures 11 and 12, the relay of the second embodiment has essentially the same structure as the relay of the first embodiment. Therefore, in the following description of the relay of the second embodiment, the structure already described in the first embodiment will not be repeated. Also, the same reference numerals are used for structures similar to those described in the relay of the first embodiment. Therefore, in the following description of this embodiment, the differences from the relay of the first embodiment will be mainly explained.

[0134] In the second embodiment, the second elastic spring piece 300a includes a second base 310, a deformable portion 320, and a connecting portion 330. The second base 310 is connected to the movable contact assembly 3100 via a second anti-rotation structure 400. Both sides of the second base 310 in the first direction D1 are provided with a deformable portion 320 and a connecting portion 330, the second base 310 is connected to the connecting portion 330 via the deformable portion 320, and the connecting portion 330 is connected to the first base 110 of the first elastic spring piece 100 via a third anti-rotation structure 700.

[0135] In embodiments of the present invention, the second base 310 is connected to the second magnetic conductor 6200 via the second anti-rotation structure 400. The second position limiting hole 311 of the second anti-rotation structure 400 is provided on the second base 310, and the second position limiting projection 410 is provided on the second magnetic conductor 6200. The third position limiting hole 720 of the third anti-rotation structure 700 is provided on the connecting portion 330, and the third position limiting projection 710 is provided on the first base 110.

[0136] As shown in Figures 13 and 14, the relay of the third embodiment has essentially the same structure as the relay of the first embodiment. Therefore, in the following description of the relay of the third embodiment, the structure already described in the first embodiment will not be repeated. Also, the same reference numerals are used for structures similar to those described in the relay of the first embodiment. Therefore, in the following description of this embodiment, the differences from the relay of the first embodiment will be mainly explained.

[0137] In the third embodiment, the second base 310 of the second elastic spring piece 300a is connected to the first base 110 of the first elastic spring piece 100 via the second anti-rotation structure 400. The connecting portions 330 on both sides of the second base 310 are inserted between the second magnetic conductor 6200 and the movable contact 3110 from both sides along the first direction D1 of the second magnetic conductor 6200, and are fixedly connected to the movable contact 3110 and the second magnetic conductor 6200.

[0138] As shown in Figure 15, the relay of the fourth embodiment has essentially the same structure as the relay of the first embodiment. Therefore, in the following description of the relay of the fourth embodiment, the structure already described in the first embodiment will not be repeated. Also, the same reference numerals are used for structures similar to those described in the relay of the first embodiment. Therefore, in the following description of this embodiment, the differences from the relay of the first embodiment will be mainly explained.

[0139] In the fourth embodiment, the movable contact assembly 3100 includes one movable contact 3110 and one second magnetic conductor 6200. Both sides of the first base 110 are provided with a spring arm 120, and both sides of the second base 310 are provided with a deformation portion 320 and a connecting portion 330.

[0140] As shown in Figure 16, the relay of the fifth embodiment has essentially the same structure as the relay of the first embodiment. Therefore, in the following description of the relay of the fifth embodiment, the structure already described in the first embodiment will not be repeated. Also, the same reference numerals are used for structures similar to those described in the relay of the first embodiment. Therefore, in the following description of this embodiment, the differences from the relay of the first embodiment will be mainly explained.

[0141] In the fifth embodiment, the movable contact assembly 3100 includes three side-by-side movable contacts 3110 and three second magnetic conductors 6200. Each side of the first base 110 is provided with three spring arms 120, and each side of the second base 310 is provided with three deformation sections 320 and three connection sections 330. The three spring arms 120 on one side of the first base 110 abut against one end of each of the three movable contacts 3110, and the three spring arms 120 on the other side of the first base 110 abut against the other end of each of the three movable contacts 3110. The six connection sections 330 on each side of the second base 310 are divided into three pairs, with two connection sections 330 in each pair facing each other in a first direction D1, and the three pairs of connection sections 330 are connected to the three second magnetic conductors 6200, respectively.

[0142] As shown in Figure 17, the relay of the sixth embodiment has essentially the same structure as the relay of the first embodiment. Therefore, in the following description of the relay of the sixth embodiment, the structure already described in the first embodiment will not be repeated. Also, the same reference numerals are used for structures similar to those described in the relay of the first embodiment. Therefore, in the following description of this embodiment, the differences from the relay of the first embodiment will be mainly explained.

[0143] In the sixth embodiment, the elastic assembly 3230 is a compression spring 600, which is provided within a chamber 800 formed by surrounding a second elastic spring piece 300a and a second magnetic conductor 6200, with one end of the compression spring 600 in contact with the second magnetic conductor 6200 and the other end of the compression spring 600 in contact with the second base 310 of the second elastic spring piece 300a. The compression spring 600 is for providing contact pressure.

[0144] Of course, in other embodiments, the second base 310 of the second elastic spring piece 300a may be connected to the second magnetic conductor 6200 of the movable contact assembly 3100, and the connecting portion 330 of the second elastic spring piece 300a may be connected to the push rod assembly 3200. The compression spring 600 is housed in a chamber formed by surrounding the second elastic spring piece 300a and the push rod assembly 3200. One end of the compression spring 600 abuts against the push rod assembly 3200, and the other end of the compression spring 600 abuts against the second base 310 of the second elastic spring piece 300a.

[0145] In addition, in the relays of the first to sixth embodiments described above, the short-circuit protection structure may be a follow-type structure in which the first magnetic conductor 6100 is fixedly connected to the upper wall 3221 of the contact bracket 3220.

[0146] Furthermore, the position limiting assembly 300 is not limited to the second elastic spring piece 300a employing a contact piece structure. For example, the position limiting assembly 300 may include an extension rod, one end of which is connected to the movable contact assembly 3100, and the other end of which is connected to the first elastic spring piece 100 or the push rod 3210, allowing the extension rod to extend and retract along the second direction D2. In other embodiments, the position limiting assembly 300 may include at least two compression springs, one end of which is connected to the first elastic spring piece 100 in a position-limiting or fixed manner, and the other end of which is connected to the movable contact assembly 3100 in a position-limiting or fixed manner.

[0147] Furthermore, the various embodiments / models provided by the present invention can be combined with each other without contradiction, and therefore their explanation is omitted here.

[0148] In the embodiments of the invention, the terms “first,” “second,” and “third” are used solely for descriptive purposes and should not be understood as indicating or implying relative importance. The term “plural” means two or more unless otherwise specified. Terms such as “attach,” “connect,” “join,” and “fix” should be understood broadly. For example, “connect” may be a fixed connection, a removable connection, or an integral connection. “Connect” may be a direct connection or an indirect connection via an intermediate medium. The specific meanings of the above terms in the embodiments of the invention can be understood by those skilled in the art depending on the specific circumstances.

[0149] In the description of embodiments of the present invention, the directions or positional relationships indicated by terms such as "up," "down," "left," "right," "front," and "back" are directions or positional relationships based on the drawings and are merely for the purpose of describing and simplifying the description of embodiments of the present invention, and do not indicate or imply that the devices or units mentioned have a particular orientation or need to be configured and operate in a particular orientation, and therefore should not be understood as limitations on embodiments of the invention.

[0150] In this specification, terms such as “one embodiment,” “several embodiments,” and “specific embodiments” mean that a particular feature, structure, material, or characteristic described in relation to this embodiment or example is included in at least one embodiment or example of the embodiment of the invention. In this specification, the general expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, any particular feature, structure, material, or characteristic described may be combined in an appropriate manner in any one or more embodiments or examples.

[0151] The above are merely preferred embodiments of the invention and are not intended to limit the embodiments of the invention. Those skilled in the art will know that the embodiments of the invention can be modified and altered in various ways. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of the invention should be included within the scope of protection of the embodiments of the invention. [Explanation of Symbols]

[0152] 1000, contact container 1001, Contact Chamber 1002, First through hole 1100, Insulating cover 1110, Ceramic cover 1111, Third through hole 1120, Flange member 1200, yoke board 1210, second through hole 2000, fixed contact lead-out end 3000, movable assembly 3100, movable contact assembly 3110, movable contact 3200, Pushrod Assembly 3210, pushrod 3211, Base 3212, rod section 3213, locking piece 3214, First position limiting projection 3220, Contact bracket 3221, upper wall 3222, side wall 3223, locking hole 3230, Elastic assembly 4000, Magnetic circuit section 4100, coil bobbin 4200, coil 4300, fixed iron core 4400, movable iron core 4410, through hole 4500, Reset component 5000, metal cover 6100, First magnetic conductor 6200, Second magnetic conductor 6300, connecting member 100, First elastic spring piece 110, First base 111, First position limiting hole 112, convex ring 112a, top side 112b, inner surface 113. Chamfering 120, spring arm 121, Extension 122, contact part 200, First anti-rotation structure 300, Position Limitation Assembly 300a, second elastic spring piece 310, second base 311, Second position limiting hole 320, deformed part 330, connection part 400, Second anti-rotation structure 410, Second position limiting projection 500, containment chamber 600, compression spring 700, Third anti-rotation structure 700a, First connection point 700b, Second connection point 710, Third position limiting projection 720, Third position limiting hole 800, Chamber

Claims

1. A movable contact assembly including a movable contact, A push rod assembly for pushing and moving the movable contact assembly so as to bring the movable contact into contact with or separate from the fixed contact lead end, A position limiting assembly connected to the movable contact assembly and the push rod assembly, for restricting the movable contact assembly from rotating relative to the push rod assembly around the axis of the push rod assembly, An elastic assembly for providing contact pressure, Includes, The elastic assembly is a first elastic spring piece, and the position limiting assembly is a second elastic spring piece, wherein the thickness of the second elastic spring piece is smaller than the thickness of the first elastic spring piece. A relay characterized by the following features.

2. The position limiting assembly can be deformed to accommodate overtravel. The relay according to claim 1, characterized in that

3. The first elastic spring piece is connected to one of the push rod assembly and the movable contact assembly, and abuts against the other of the push rod assembly and the movable contact assembly. The relay according to claim 1, characterized in that

4. The first elastic spring piece, together with the movable contact assembly, forms a housing chamber, and the position limiting assembly is housed within the housing chamber. The relay according to claim 3, characterized in that it is a relay.

5. The movable contact further includes a pair of fixed contact lead-outs, the two ends of the movable contact in a first direction being for contacting or separating from the pair of fixed contact lead-outs, where the first direction is the direction in which the pair of fixed contact lead-outs are arranged. The first elastic spring piece includes a first base and a spring arm, the first base is connected to the push rod assembly via a first anti-rotation structure, and at least one of the spring arms is provided at both ends of the first base in the first direction. The spring arms at both ends of the first base in the first direction are in contact with both ends of the movable contactor in the first direction, respectively. The relay according to claim 3, characterized in that it is a relay.

6. The spring arm includes an extension connected to the first base, and a contact portion connected to one end of the extension away from the first base and in contact with the end of the movable contact in the first direction, wherein the width of the end of the extension connected to the first base is greater than the width of the end of the extension connected to the contact portion. The relay according to claim 5, characterized in that it is a relay.

7. The width of the extension gradually decreases in the direction from the first base towards the contact portion. The relay according to claim 6, characterized in that it is a relay.

8. The first anti-rotation structure is, The push rod assembly and at least two first position limiting protrusions provided on one of the first bases, The push rod assembly includes at least two first position limiting holes provided on the other side of the first base, wherein the at least two first position limiting projections are each inserted into the at least two first position limiting holes. The relay according to claim 5, characterized in that it is a relay.

9. The second elastic spring piece is connected to one of the elastic assembly and the movable contact assembly via a second anti-rotation structure, and to the other of the elastic assembly and the movable contact assembly via a third anti-rotation structure. The relay according to claim 1, characterized in that

10. The second anti-rotation structure is, The elastic assembly and at least two second position-limiting protrusions provided on one of the second elastic spring pieces, The elastic assembly includes at least two second position limiting holes provided on the other side of the second elastic spring piece, wherein the at least two second position limiting projections are each inserted into the at least two second position limiting holes. The relay according to claim 9, characterized in that it is a relay.

11. The elastic assembly is connected to the push rod assembly via a first anti-rotation structure, the first anti-rotation structure includes at least two first position-limiting projections and at least two first position-limiting holes, the at least two first position-limiting projections are provided on the push rod assembly, the at least two first position-limiting holes are provided on the elastic assembly, and the at least two first position-limiting projections are respectively inserted into the at least two first position-limiting holes. Each of the second position-limiting protrusions is a convex ring, one of the convex rings surrounds one of the first position-limiting holes, and the inner surface of the convex ring is flush with the hole wall of the first position-limiting hole. The relay according to claim 10, characterized in that...

12. The convex ring is formed by bending the edge of the first position limiting hole in the elastic assembly toward the movable contact assembly. The relay according to claim 11, characterized in that...

13. The movable contact further includes a pair of fixed contact lead-outs, the two ends of the movable contact in a first direction being for contacting or separating from the pair of fixed contact lead-outs, where the first direction is the direction in which the pair of fixed contact lead-outs are arranged. The second elastic spring piece includes a second base, a deformable portion, and a connecting portion. The second base is connected to one of the elastic assembly and the movable contact assembly via the second anti-rotation structure, and both sides of the second base in the first direction are provided with the deformable portion and the connecting portion, the second base is connected to the connecting portion via the deformable portion, and the connecting portion is connected to the other of the elastic assembly and the movable contact assembly via the third anti-rotation structure. The relay according to claim 9, characterized in that it is a relay.

14. Along the first direction, the connecting portion on one side of the second base forms a first connection point with the movable contact assembly, the connecting portion on the other side of the second base forms a second connection point with the movable contact assembly, there is a first distance between the first connection point and the second connection point, there is a second distance between the deformable portions on both sides of the second base, the first distance is smaller than the second distance, Here, the second distance is the largest distance between the deformed portions on both sides of the second base. The relay according to claim 13, characterized in that

15. The third anti-rotation structure is, The second elastic spring piece and at least two third position limiting protrusions provided on one of the movable contact assembly, The assembly includes the second elastic spring piece and at least two third position limiting holes provided on the other side of the movable contact assembly, wherein the at least two third position limiting projections are each inserted into the at least two third position limiting holes. The relay according to claim 9, characterized in that it is a relay.

16. The relay further includes a first magnetic conductor, The first magnetic conductor is provided on one side of the movable contact assembly toward the fixed contact lead-out end, and is intended to resist electrical repulsion. The relay according to claim 1, characterized in that

17. The movable contact assembly further includes a second magnetic conductor, the second magnetic conductor being fixedly connected to one side of the movable contact facing away from the fixed contact lead end, and the second magnetic conductor is for forming a magnetic circuit with the first magnetic conductor. The relay according to claim 16, characterized in that

18. The movable contact further includes a pair of fixed contact lead-outs, the two ends of the movable contact in a first direction being for contacting or separating from the pair of fixed contact lead-outs, where the first direction is the direction in which the pair of fixed contact lead-outs are arranged. The second elastic spring piece includes a second base, a deformable portion, and a connecting portion. The deformation portion and the connecting portion are provided on both sides of the second base along the first direction, the second base is connected to the connecting portion via the deformation portion, and the second base is connected to the elastic assembly. The connecting portions on both sides of the second base are inserted between the second magnetic conductor and the movable contact from both sides along the first direction of the second magnetic conductor, and are fixedly connected to the movable contact and the second magnetic conductor. The relay according to claim 17, characterized in that

19. A movable contact assembly including a movable contact, A push rod assembly for pushing and moving the movable contact assembly so as to bring the movable contact into contact with or separate from the fixed contact lead end, A position limiting assembly connected to the movable contact assembly and the push rod assembly, for restricting the movable contact assembly from rotating relative to the push rod assembly around the axis of the push rod assembly, An elastic assembly for providing contact pressure, Includes, The elastic assembly is a compression spring, one end of which abuts against the position limiting assembly, and the other end of which abuts against the movable contact assembly or the push rod assembly. A relay characterized by the following features.

20. The position limiting assembly is a second elastic spring piece, The second elastic spring piece includes a second base, a deformable portion, and a connecting portion, the second base being connected to the push rod assembly, the deformable portion and the connecting portion being provided on both sides of the second base in a first direction, the second base being connected to the connecting portion via the deformable portion, and the connecting portion being connected to the movable contact assembly, where the first direction is the direction in which the pair of fixed contact lead-out ends are arranged. The second elastic spring piece and the movable contact assembly are enclosed to form a chamber, the compression spring is housed within the chamber, one end of the compression spring abuts against the second base, and the other end of the compression spring abuts against the movable contact assembly. The relay according to claim 19, characterized in that

21. The movable contact further includes a pair of fixed contact lead-outs, the two ends of the movable contact in a first direction being for contacting or separating from the pair of fixed contact lead-outs, where the first direction is the direction in which the pair of fixed contact lead-outs are arranged. The elastic assembly and the push rod assembly are connected in a position-restrictive manner along the first direction, and / or the position-restrictive assembly and the movable contact assembly are connected in a position-restrictive manner along the first direction, and / or the position-restrictive assembly and the elastic assembly are connected in a position-restrictive manner along the first direction. The relay according to claim 1, characterized in that

22. The pushrod assembly includes a contact bracket, the movable contact assembly includes one or more movable contacts, and the movable contact assembly is mounted within the contact bracket by the elastic assembly. The relay according to claim 1, characterized in that

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