relay

Abstract

The present disclosure provides a relay including a base (10), a contact assembly (40), a push rod mechanism (20), and a resilient member (500). The contact assembly (40) includes a fixed contact and a movable contact that can be brought into contact or separated, the fixed contact being fixedly connected to the base (10), the push rod mechanism (20) being movable between a first position and a second position relative to the base (10) along the contact separation direction of the contact assembly, the elastic member (500) including a first elastic portion (510) and a second elastic portion (520), the movable contact being attached to the push rod mechanism (20) via the first elastic portion (510), the first elastic portion (510) being used to apply contact pressure when the push rod mechanism (20) is located at the first position, and the second elastic portion (520) being used to apply an elastic force to the push rod mechanism (20) to move it toward the first position when the push rod mechanism (20) is located at the second position.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This disclosure claims priority to Chinese Patent Application Nos. 202211538297.8, 202223233490.9, 202223234194.0 and 202223234231.8, filed on December 01, 2022, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the technical field of electronic control devices, and in particular to relays. [Background technology]

[0003] A relay is an electronic control device that has a control system (also called input circuit) and a controlled system (also called output circuit), and is usually applied in automatic control circuits. A relay is actually an "automatic switch" that controls a large current with a small current. Therefore, in the circuit, it plays roles such as automatic adjustment, safety protection, and conversion circuit.

[0004] The operating voltage of a relay refers to the voltage applied to the coil when the contacts are switched from a separated to a closed state. If the relay is a magnetically held relay, the release voltage refers to the voltage applied to the coil when the contacts are switched from a closed to a separated state. If the relay is a non-magnetically held relay, the coil voltage remaining when the contacts are switched from a closed to a separated state is called the release voltage.

[0005] However, the relays in the related art cannot adjust the operating voltage well, and if the relay is a magnetic holding relay, the adjustments to the operating voltage and the release voltage cannot be made independently, so there is a need to further improve the flexibility of adjustment. Summary of the Invention

[0006] The embodiments of the present disclosure provide a relay to solve the problem that adjustment to the operating voltage and the return voltage is inconvenient in the related art.

[0007] A relay according to an embodiment of the present disclosure includes a base, a contact assembly, a push rod mechanism, and an elastic member. The contact assembly includes a fixed contact and a movable contact that can be brought into contact or separated, the fixed contact being fixedly connected to the base. The push rod mechanism is movable between a first position and a second position relative to the base along a contact / separation direction of the contact assembly. The elastic member includes a first elastic portion and a second elastic portion. The movable contact is attached to the push rod mechanism via the first elastic portion. The first elastic portion is used to apply contact pressure when the push rod mechanism is located at the first position, and the second elastic portion is used to apply an elastic force to the push rod mechanism to move it toward the first position when the push rod mechanism is located at the second position.

[0008] According to some embodiments of the present disclosure, when the push rod mechanism is in the second position, one end of the second elastic portion abuts against the movable contact and the other end of the second elastic portion abuts against the base.

[0009] According to some embodiments of the present disclosure, when the push rod mechanism is in the first position, the second elastic portion does not apply an elastic force to the push rod mechanism.

[0010] According to some embodiments of the present disclosure, the relay further comprises a permanent magnet;

[0011] The push rod mechanism includes a push rod and an iron core. The iron core is connected to the push rod, and the permanent magnet is provided on the side of the iron core facing away from the push rod.

[0012] According to some embodiments of the present disclosure, the base includes a bottom wall, a side wall, and a stopper portion, the side wall is connected to the bottom wall, the stopper portion is connected to an inner surface of the side wall, and is used to abut against the second elastic portion, and when the push rod mechanism is located in the first position, the second elastic portion does not contact the stopper portion.

[0013] According to some embodiments of the present disclosure, the second elastic portion includes two elastic sheets provided on both sides of the first elastic portion along the width direction of the movable contactor.

[0014] Each of the elastic sheets has a second elastic arm at each end along the longitudinal direction of the movable contactor, the second elastic arm being pressed against the space between the movable contactor and the base.

[0015] According to some embodiments of the present disclosure, the second elastic arm includes a second bent portion and a lead, a protrusion of the second bent portion is used to abut against the movable contact, one end of the lead is connected to the second bent portion, and the other end is used to abut against the base.

[0016] According to some embodiments of the present disclosure, the elastic member is fixedly connected to the movable contact via the first elastic portion.

[0017] According to some embodiments of the present disclosure, the first elastic portion includes a main spring piece and a first elastic arm, and has connection portions at both ends of the main spring piece along the longitudinal direction of the movable contactor, the connection portions being fixedly connected to the movable contactor, an opening being provided between the two connection portions, one end of the first elastic arm being connected to the edge of the opening, and the other end being used to abut against the push rod mechanism.

[0018] According to some embodiments of the present disclosure, the other end of the elastic arm has a first bent portion, and a protrusion of the first bent portion is used to abut against the push rod mechanism.

[0019] According to some embodiments of the present disclosure, the connection portion has a connection hole, and movable contacts provided on both ends of the movable contactor are drilled into the connection hole.

[0020] According to some embodiments of the present disclosure, the plane in which the opening is located and the plane in which the connection portion is located are not coplanar.

[0021] According to some embodiments of the present disclosure, the push rod mechanism includes a push rod, the push rod including a rod portion and a bottom portion, the bottom portion connected to one axial end of the rod portion, and the movable contactor being movable along the axial direction of the rod portion relative to the bottom portion between a third position and a fourth position, the first elastic portion abutting between the bottom portion and the movable contactor and used to apply an elastic force to the movable contactor to move toward the third position, the elastic member being provided between the bottom portion and the movable contactor, when the push rod mechanism is located at the first position, the movable contactor is located at the fourth position, and when the push rod mechanism is located at the second position, the movable contactor is located at the third position.

[0022] According to some embodiments of the present disclosure, the push rod further includes a first side portion and a second side portion, both of which are connected to the bottom portion and are arranged opposite each other along the longitudinal direction of the movable contactor, the first side portion having a first through hole and the second side portion having a second through hole, the movable contactor and the elastic member both being drilled through the first through hole and the second through hole, and in the third position, the movable contactor abuts against the hole wall of the first through hole and the hole wall of the second through hole, respectively.

[0023] According to some embodiments of the present disclosure, the first elastic portion and the second elastic portion are of a unitary structure.

[0024] One embodiment of the above invention has at least the following advantages or beneficial effects.

[0025] In the relay according to the embodiment of the present disclosure, the magnitude of the operating voltage of the relay can be adjusted by adjusting the magnitude of the elastic force of the second elastic portion.

[0026] Furthermore, if the relay has a permanent magnet (i.e., the relay has a magnetic holding function), the magnitude of the release voltage of the relay can be adjusted independently by adjusting the magnitude of the elastic force of the first elastic part without affecting the operating voltage, and the magnitude of the operating voltage can be adjusted independently by adjusting the magnitude of the elastic force of the second elastic part without affecting the release voltage, and further, a state can be achieved in which there is no voltage difference between the operating voltage and the release voltage.In this case, the magnetic holding force can be increased or decreased simply by magnetizing or demagnetizing the permanent magnet, so the operating voltage and the release voltage can be adjusted synchronously without adjusting for variations in other parts of the relay, and the requirements for precision of the other parts can be reduced.

[0027] The above and other features and advantages of the present disclosure will become more apparent from the detailed description of illustrative embodiments thereof, which proceeds with reference to the accompanying drawings. [Brief explanation of the drawings]

[0028] [Figure 1] 1 shows a top view of a first embodiment of a relay of the present disclosure with the top cover omitted and the contact assembly in a fully separated state. [Figure 2] 2 shows a cross-sectional view taken along line AA in FIG. 1. [Figure 3] 3 shows a cross-sectional view taken along line BB in FIG. 2. [Figure 4] 2 is a schematic cross-sectional view of the contact assembly in FIG. 1 in a fully closed state, with the push rod mechanism and magnetic circuit mechanism omitted. [Figure 5] 2 is a schematic cross-sectional view of the contact assembly in FIG. 1 in a completely separated state, with the push rod mechanism and magnetic circuit mechanism omitted. [Figure 6] 2 is a schematic cross-sectional view showing the state immediately after the second elastic portion of the elastic member comes into contact with the base in the contact separation process of the relay in FIG. 1, with the push rod mechanism and magnetic circuit mechanism omitted. [Figure 7] FIG. [Figure 8] 1 is a schematic side view of an elastic member. [Figure 9] FIG. 2 shows a schematic perspective view of a push rod. [Figure 10] 10 shows a schematic diagram of the push rod, yoke plate, elastic member and contact assembly after assembly. [Figure 11] A schematic side view of Figure 10 is shown. [Figure 12] 12 shows a cross-sectional view taken along line CC in FIG. [Figure 13] 1 illustrates a top view of a relay according to an embodiment of the present disclosure with the top cover removed and the contact assembly in a fully closed state. [Figure 14] 14 shows a cross-sectional view taken along the line DD in FIG. 13. [Figure 15] 15 shows a cross-sectional view taken along the line EE in FIG. 14. [Figure 16] 2 is a perspective schematic view of the contact assembly in FIG. 1 in a fully closed state, with the push rod mechanism and magnetic circuit mechanism omitted. [Figure 17] 2 is a perspective schematic view of the contact assembly in FIG. 1 in a completely separated state, with the push rod mechanism and magnetic circuit mechanism omitted. [Figure 18] 2 is a perspective schematic view showing the state immediately after the second elastic portion of the elastic member comes into contact with the base in the contact separation process of the relay in FIG. 1, with the push rod mechanism and magnetic circuit mechanism omitted. [Figure 19] 1 shows a top view of a second embodiment of a relay of the present disclosure, with the top cover omitted. [Figure 20] 20 shows a cross-sectional view taken along the line FF in FIG. 19. [Figure 21] 21 shows a cross-sectional view along line GG in FIG. 20. [Figure 22]1 shows an exploded schematic view of a fixed contactor and a fixed contact point according to an embodiment of the present disclosure. [Figure 23] 1 shows a schematic diagram of the contact assembly and push rod after assembly. [Figure 24] 10 shows another schematic diagram of a relay according to an embodiment of the present disclosure, with the bottom surface of the base facing upward. [Figure 25] 21 shows a cross-sectional view taken along line HH in FIG. 20. [Figure 26] 26 shows a partially enlarged view of the X1 portion of FIG. 25. [Figure 27] FIG. 1 is an exploded schematic view of a push rod mechanism according to the prior art. [Figure 28] 1 shows a cross-sectional view of a push rod mechanism according to the prior art after assembly. [Figure 29] 10 shows a top view of a relay according to a third embodiment of the present disclosure, with the top cover omitted. [Figure 30] 29. FIG. 29 shows a cross-sectional view taken along line II. [Figure 31] 31 shows a cross-sectional view taken along line JJ in FIG. 30. [Figure 32] FIG. 2 shows a top view of the push rod mechanism of the first embodiment of the present disclosure. [Figure 33] An exploded schematic diagram of Figure 32 is shown. [Figure 34] A cross-sectional view along KK in FIG. 32 is shown. [Figure 35] 1 shows a schematic diagram of the first iron core viewed from one viewing angle. [Figure 36] 3A and 3B are schematic diagrams showing the first iron core as viewed from different viewing angles. [Figure 37] A schematic diagram of the second iron core viewed from one viewing angle is shown. [Figure 38] 1A and 1B are schematic diagrams showing the second iron core viewed from different viewing angles. [Figure 39] 10 shows a schematic diagram of a push rod mechanism according to another embodiment of the present disclosure. [Figure 40] A schematic diagram of the first iron core in FIG. 39 is shown. [Figure 41] A schematic diagram of the second iron core in FIG. 39 is shown. [Figure 42]10 shows a schematic diagram of a push rod mechanism according to another embodiment of the present disclosure. [Figure 43] 10 shows a schematic diagram of a push rod mechanism according to another embodiment of the present disclosure. [Figure 44] 10 shows a schematic diagram of a push rod mechanism according to another embodiment of the present disclosure. [Figure 45] 45 shows an enlarged partial view of the X2 portion of FIG. [Figure 46] 10 shows a cross-sectional schematic view of a push rod mechanism according to another embodiment of the present disclosure. [Figure 47] FIG. 1 is an exploded schematic view of a push rod mechanism according to the prior art. [Figure 48] 1 shows a cross-sectional view of a push rod mechanism according to the prior art after assembly. [Figure 49] 10 shows a top view of a relay according to a fourth embodiment of the present disclosure, with the top cover omitted. [Figure 50] A cross-sectional view along LL in FIG. 49 is shown. [Figure 51] A cross-sectional view along MM in FIG. 50 is shown. [Figure 52] 1 shows a schematic diagram of a push rod mechanism according to a first embodiment of the present disclosure. [Figure 53] A cross-sectional view along the line NN in FIG. 52 is shown. [Figure 54] FIG. 54 is a partial enlarged view of the X3 portion of FIG. 53. [Figure 55] A schematic diagram of the iron core of Figure 52 is shown. [Figure 56] FIG. 10 shows a schematic view of a push rod mechanism according to another embodiment of the present disclosure from one viewing angle. [Figure 57] 57 is a schematic diagram of the push rod mechanism of FIG. 56 as seen from another viewing angle. [Figure 58] 57 shows a cross-sectional view along PP in FIG. 56. [Figure 59] A partially enlarged view of the X4 portion of Figure 58 is shown. [Figure 60] A schematic diagram of the push rod of Figure 56 is shown. [Figure 61] 10 shows a schematic diagram of a push rod mechanism according to another embodiment of the present disclosure. [Figure 62]62 shows a cross-sectional view along RR in FIG. 61. [Figure 63] A schematic diagram of the iron core in FIG. 61 is shown. DETAILED DESCRIPTION OF THE INVENTION

[0029]

[0023] Exemplary embodiments will now be described in more detail with reference to the accompanying drawings. However, exemplary embodiments may be embodied in many forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of exemplary embodiments to those skilled in the art. Since the same reference numerals in the drawings indicate the same or similar structures, detailed descriptions will be omitted.

[0030] 1 to 3, Fig. 1 shows a top view of a relay according to an embodiment of the present disclosure, with the upper cover omitted and the contact assembly in a completely separated state, Fig. 2 shows a cross-sectional view taken along line AA in Fig. 1, and Fig. 3 shows a cross-sectional view taken along line BB in Fig. 2. The relay according to the embodiment of the present disclosure includes a base 10, a push rod mechanism 20, a magnetic circuit mechanism 30, and a contact assembly 40. The push rod mechanism 20, the magnetic circuit mechanism 30, and the contact assembly 40 are mounted on the base 10, and the magnetic circuit mechanism 30 controls the contact or separation of the contacts of the contact assembly 40 via the push rod mechanism 20.

[0031] It is understood that the terms "comprise," "have," and variations thereof in the embodiments of the present disclosure are intended to be non-exclusive inclusive. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, and may optionally include steps or units not listed, or may optionally include other steps or components inherent to the process, method, product, or apparatus.

[0032] The magnetic circuit mechanism 30 includes a yoke structure 310, a bobbin 320, and a coil 330. The yoke structure 310 forms a chamber, and the bobbin 320 and the coil 330 are both provided within the chamber of the yoke structure 310. The coil 330 is wound around the outer periphery of the bobbin 320 to form a magnetic control circuit. The bobbin 320 is provided with a central hole 321 in the direction of contact separation of the contacts of the contact assembly 40, into which one end of the push rod mechanism 20 is drilled.

[0033] For example, the yoke structure 310 includes a yoke plate 311 and a U-shaped yoke 312, which are connected to each other to form a ring shape. The yoke plate 311 has a through-hole 3111 through which the push rod mechanism 20 is inserted.

[0034] Of course, in other embodiments, the yoke structure 310 may include a cylindrical yoke and a yoke plate 311, which are connected together to form a ring shape. The magnetic circuit mechanism 30 further includes two permanent magnets 340, which are mounted on the bobbin 320 and positioned on either side of the moving direction D3 of the push rod mechanism 20. The two permanent magnets 340 form a magnetically holding magnetic circuit structure, which is advantageous for reducing power consumption costs, extending the service life, and improving stability.

[0035] Of course, in other embodiments, permanent magnet 340 may not be included.

[0036] 3, the push rod mechanism 20 is movable between a first position and a second position relative to the base 10 along the contact / separation direction of the contact assembly 40. The push rod mechanism 20 includes a push rod 210 and an iron core 220, which is connected to the push rod 210. The iron core 220 is movable along the contact / separation direction by a magnetic control circuit formed by a coil 330, and further, the contact / separation of the contacts of the contact assembly 40 is controlled by moving the push rod 210. A permanent magnet 340 is provided on the side of the iron core 220 facing away from the push rod 210.

[0037] In this embodiment, the push rod mechanism 20 includes two iron cores 220, which may be arranged on either side of the push rod 210, and a permanent magnet 340 is arranged on the side of each iron core 220 facing away from the push rod 210.

[0038] Continuing to refer to Figures 1 to 3, the contact assembly 40 includes movable contacts 410a, 410b and fixed contacts 420a, 420b, the fixed contacts 420a, 420b being fixedly attached to the base 10, and the movable contacts 410a, 410b being attached to the push rod mechanism 20 and moving in conjunction with the push rod mechanism 20.

[0039] In this embodiment, the contact assemblies 40 are two sets of a first contact assembly 40a and a second contact assembly 40b, and the first contact assembly 40a and the second contact assembly 40b are arranged along the moving direction D3 of the push rod mechanism 20. The first contact assembly 40a is close to the magnetic circuit mechanism 30, and the second contact assembly 40b is away from the magnetic circuit mechanism 30.

[0040] The first contact assembly 40a includes a first movable contact 410a and two first fixed contacts 420a. The second contact assembly 40b includes a second movable contact 410b and two second fixed contacts 420b. Both ends of the first movable contact 410a can be brought into contact with or separated from the two first fixed contacts 420a, respectively, and both ends of the second movable contact 410b can be brought into contact with or separated from the two second fixed contacts 420b, respectively.

[0041] Of course, in other embodiments, the contact assemblies 40 may be a single set or other quantities.

[0042] Both ends of the movable contactors 410a, 410b in the longitudinal direction D1 are movable contacts, and the movable contacts may protrude from other parts of the movable contactors 410a, 410b or may be flush with other parts. The parts where the fixed contactors 420a, 420b and the movable contacts come into contact are fixed contacts, and the fixed contacts may protrude from other parts of the fixed contactors 420a, 420b or may be flush with other parts.

[0043] As an example, the first movable contactor 410a includes a first movable contactor body 414a and a first movable contact 411a, and the first movable contact 411a and the first movable contactor body 414a have separate structures, and the first movable contact 411a and the first movable contactor body 414a may be connected by crimping, but this is not limited to this. The first fixed contactor 420a includes a first fixed contactor body 421a and a first fixed contact 422a, and the first fixed contact 422a and the first fixed contactor body 421a have separate structures, and the first fixed contact 422a and the first fixed contactor body 421a may be connected by crimping, but this is not limited to this.

[0044] The second movable contactor 410b includes a second movable contactor body 434b and a second movable contact 431b, the second movable contactor body 431b and the second movable contactor body 434b having separate structures, and the second movable contactor body 431b and the second movable contactor body 434b may be connected by crimping, but is not limited to this. The second fixed contactor 420b includes a second fixed contactor body 441b and a second fixed contact 442b, the second fixed contactor body 442b and the second fixed contactor body 441b having separate structures, and the second fixed contactor body 442b and the second fixed contactor body 441b may be connected by crimping, but is not limited to this.

[0045] Of course, in other embodiments, the first movable contact 411a and the first movable contactor body 414a may be an integral structure, the first fixed contact 422a and the first fixed contactor body 421a may be an integral structure, the second movable contact 431b and the second movable contactor body 434b may be an integral structure, and the second fixed contact 442b and the second fixed contactor body 441b may be an integral structure.

[0046] The relay of the embodiment of the present disclosure further includes a short-circuit resistant structure, which may include a first magnetic conductive body 610 and a second magnetic conductive body 620, where the first magnetic conductive body 610 is fixedly connected to the base 10, the second magnetic conductive body 620 is fixedly connected to the first movable contactor 410a, and the second magnetic conductive body 620 is provided on the side of the first movable contactor 410a opposite to the first magnetic conductive body 610. A magnetic circuit is formed between the first magnetic body 610 and the second magnetic body 620, and when a short-circuit current passes through the first movable contactor 410a, an attractive force is generated between the first magnetic body 610 and the second magnetic body 620 along the pressure direction of the contacts. This attractive force can resist the electric repulsive force caused by the short-circuit current between the movable contactor of the first movable contactor 410a and the fixed contactor of the first fixed contactor 420a, ensuring that the movable contactor of the first movable contactor 410a and the fixed contactor of the first fixed contactor 420a do not pop off.

[0047] 3, the relay further includes elastic members 500, and the number of the elastic members 500 is the same as the number of the contact assemblies 40. In this embodiment, the relay includes two elastic members 500, and the two elastic members 500 are connected to the first movable contact 410a of the first contact assembly 40a and the second movable contact 410b of the second contact assembly 40b, respectively.

[0048] The elastic member 500 includes a first elastic portion 510 and a second elastic portion 520, which are integral with each other. The movable contacts 410a, 410b are attached to the push rod 210 of the push rod mechanism 20 via the first elastic portion 510. The first elastic portion 510 is used to apply contact pressure when the push rod mechanism 20 is located at the first position, and the second elastic portion 520 is used to apply an elastic force to the push rod mechanism 20 to move it toward the first position when the push rod mechanism 20 is located at the second position.

[0049] Of course, in other embodiments, the first elastic portion 510 and the second elastic portion 520 may be separate structures.

[0050] As shown in FIGS. 4, 5, and 13 to 18, FIG. 4 is a schematic cross-sectional view of the contact assembly in FIG. 1 in a fully closed state, and FIG. 5 is a schematic cross-sectional view of the contact assembly in FIG. 1 in a fully separated state, where the push rod mechanism 20 and the magnetic circuit mechanism 30 are omitted in FIGS. 4 and 5. FIG. 13 is a top view of a relay according to an embodiment of the present disclosure, with the upper cover omitted and the contact assembly in a fully closed state. FIG. 14 is a cross-sectional view taken along line DD in FIG. 13, and FIG. 15 is a cross-sectional view taken along line EE in FIG. 14. FIG. 16 is a schematic perspective view of the contact assembly in FIG. 1 in a fully closed state, where the push rod mechanism and the magnetic circuit mechanism are omitted. FIG. 17 is a schematic perspective view of the contact assembly in FIG. 1 in a fully separated state, where the push rod mechanism and the magnetic circuit mechanism are omitted. 18 is a perspective schematic view showing the state immediately after the second elastic portion of the elastic member comes into contact with the base during the contact separation process of the relay in FIG. 1, with the push rod mechanism and magnetic circuit mechanism omitted. When the contact assembly 40 is in a fully closed state, the push rod mechanism 20 is located at a first position relative to the base 10. When the contact assembly 40 is in a fully separated state, the push rod mechanism 20 is located at a second position relative to the base 10.

[0051] The fully closed state of the contact assembly 40 refers to the state of the contact assembly 40 when the movable contact of the contact assembly 40 contacts the fixed contact and the overtravel is complete (as shown in FIGS. 4, 13, 15, and 16). The fully separated state of the contact assembly 40 refers to the state of the contact assembly 40 when the movable contact of the contact assembly 40 separates from the fixed contact and the contact gap is at its maximum (as shown in FIGS. 1, 3, 5, and 17).

[0052] When the contact assembly 40 is in the fully closed state, the push rod mechanism 20 is in a first position, and the first elastic member 510 is used to apply overtravel contact pressure. When the contact assembly 40 is in the fully separated state, the push rod mechanism 20 is in a second position, and the second elastic member 520 is used to apply an elastic force to the push rod mechanism 20 to move toward the first position. When the contact assembly 40 is in the fully separated state, the second elastic member 520 applies an elastic force to the push rod mechanism 20 so that the push rod mechanism 20 tends to move toward the first position. Therefore, when it becomes necessary to move the push rod mechanism 20 again (i.e., when the contact assembly 40 switches to the closed state) and current is applied to the coil, the elastic force from the second elastic member 520 acts on the push rod mechanism 20. Therefore, the voltage applied to the coil can be reduced, and the operating voltage can be reduced so that the magnitude of the operating voltage falls within a standard range. The standard range of the operating voltage may be, but is not limited to, 40% to 60% of the rated voltage.

[0053] Furthermore, the magnitude of the operating voltage of the relay can be flexibly adjusted by adjusting the magnitude of the elastic force from the second elastic portion 520. Specifically, when the elastic force from the second elastic portion 520 is increased, the operating voltage of the relay also decreases accordingly. When the elastic force from the second elastic portion 520 is decreased, the operating voltage of the relay also increases accordingly.

[0054] Furthermore, if the relay has a permanent magnet 340 (i.e., the relay has a magnetic holding function), the magnitude of the return voltage of the relay can also be flexibly adjusted by adjusting the magnitude of the elastic force from the first elastic portion 510. Specifically, when the elastic force from the first elastic portion 510 is increased, the return voltage of the relay also decreases accordingly. When the elastic force from the first elastic portion 510 is decreased, the return voltage of the relay also increases accordingly.

[0055] Therefore, by adjusting the magnitude of the elastic force from the second elastic portion 520, the magnitude of the operating voltage can be adjusted independently without affecting the release voltage, and by adjusting the magnitude of the elastic force from the first elastic portion 510, the magnitude of the release voltage of the relay can be flexibly adjusted without affecting the operating voltage, and further, a state can be achieved in which there is no voltage difference between the operating voltage and the release voltage. In this case, since the magnetic holding force can be increased or decreased simply by magnetizing or demagnetizing the permanent magnet 340, the operating voltage and the release voltage can be adjusted synchronously without adjusting for variations in other parts of the relay, and the requirements for precision of the other parts can be reduced.

[0056] It should be noted that the magnitude of the elastic force from the second elastic portion 520 can be adjusted by changing the elastic coefficient of the second elastic portion 520. For example, the elastic coefficient of the second elastic portion 520 can be changed by changing the amount of deformation of the second elastic portion 5200 in an unpressurized state to adjust the magnitude of the elastic force from the second elastic portion 520, or by changing the width of the second elastic portion 520, but it should be understood that this is not limited to this.

[0057] As shown in FIG. 4, when the push rod mechanism 20 is in the first position (the contact assembly 40 is in a fully closed state), the second elastic portion 520 does not apply an elastic force to the push rod mechanism 20.

[0058] As shown in Figure 5, when the push rod mechanism 20 is in the second position (the contact assembly 40 is in a completely separated state), one end of the second elastic portion 520 abuts against the movable contacts 410a, 410b, and the other end of the second elastic portion 520 abuts against the base 10.

[0059] Of course, in other embodiments, when the push rod mechanism 20 is located in the second position, one end of the second elastic portion 520 abuts against the push rod 210 of the push rod mechanism 20, and the other end of the second elastic portion 520 abuts against the base 10.

[0060] 5 , the base 10 includes a bottom wall 130, a side wall 140, and a stopper portion 150. The side wall 140 is connected to the bottom wall 130 and may surround the edge of the bottom wall 130, with the side wall 140 and the bottom wall 130 together enclosing a space for accommodating the push rod mechanism 20, the magnetic circuit mechanism 30, the contact assembly 40, the elastic member 500, etc. The stopper portion 150 is connected to the inner surface of the side wall 140 and / or the inner surface of the bottom wall 130 and is used to abut against the second elastic portion 520.

[0061] 6, Fig. 6 shows a schematic cross-sectional view of the relay in Fig. 1 immediately after the second elastic portion 520 of the elastic member 500 comes into contact with the base during the contact separation process, and the push rod mechanism 20 and the magnetic circuit mechanism 30 are omitted. When the contact assembly 40 of the relay is switched from the fully separated state to the fully closed state (i.e., switched from Fig. 5 to Fig. 4), the second elastic portion 520 of the elastic member 500 passes through an intermediate state immediately after coming into contact with the base 10.

[0062] 7 and 8, Fig. 7 shows a schematic perspective view of the elastic member 500, and Fig. 8 shows a schematic side view of the elastic member 500. The first elastic portion 510 of the elastic member 500 includes a main spring piece 511 and a first elastic arm 512. The main spring piece 511 extends along the longitudinal direction D1 of the movable contacts 410a, 410b and has connecting portions 5111 for fixedly connecting to the movable contacts 410a, 410b along both ends of the movable contacts 410a, 410b in the longitudinal direction D1, and an opening 5112 is provided between the two connecting portions 5111. One end of the first elastic arm 512 is connected to an edge of the opening 5112, and the other end is used to abut against the push rod mechanism 20. The other end of the first elastic arm 512 has a first bent portion 5121 , and a protrusion 5122 of the first bent portion 5121 is used to abut against the push rod mechanism 20 .

[0063] In this embodiment, the first elastic portion 510 includes two first elastic arms 512 , and the two first elastic arms 512 are provided centrosymmetrically with respect to the center of the opening 5112 .

[0064] The connecting portion 5111 has a connecting hole 5113, and the movable contacts provided on both ends of the movable contactors 410a and 410b are drilled in the connecting hole 5113 (as shown in FIG. 9). The plane on which the opening 5112 is located and the plane on which the connecting portion 5111 is located are not located on the same plane.

[0065] 7 and 8, the second elastic portion 520 of the elastic member 500 includes two elastic sheets 521, which are provided on both sides along the width direction D2 of the movable contacts 410a, 410b of the first elastic portion 510. Both ends of each elastic sheet 521 along the longitudinal direction D1 of the movable contacts 410a, 410b respectively have second elastic arms 522, which are used to press the movable contacts 410a, 410b against the base 10.

[0066] By adjusting the amount of initial deformation of the second elastic arm 522 in a non-pressurized state, the magnitude of the elastic force from the second elastic arm 522 can be adjusted, and further the magnitude of the operating voltage of the relay can be adjusted.

[0067] The second elastic arm 522 includes a second bent portion 5221 and a lead 5222, and the protrusion 5223 of the second bent portion 5221 is used to abut against the movable contacts 410a, 410b, one end of the lead 5222 is connected to the second bent portion 5221, and the other end is used to abut against the base 10.

[0068] When the contact assembly 40 is in a fully separated state (i.e., the push rod mechanism 20 is in the second position), the deformation of the reed 5222 exerts a resilient force on the push rod mechanism 20 such that the push rod mechanism 20 tends to move to the first position.

[0069] 9 to 12, FIG. 9 is a schematic perspective view of the push rod, FIG. 10 is a schematic view of the push rod 210, the yoke plate 311, the elastic member 500, and the contact assembly 40 after assembly, FIG. 11 is a schematic side view of FIG. 10, and FIG. 12 is a cross-sectional view taken along line CC of FIG. 11. The push rod 210 includes a rod portion 211, a bottom portion 2120, a first side portion 213, and a second side portion 214. The first movable contact 410a is connected to the bottom portion 2120 via a first elastic portion 510. One elastic member 500 is provided between the first movable contact 410a and the bottom portion 2120. The rod portion 211 is movably inserted in a through-hole 3111 of the yoke plate 311, and the iron core 220 is connected to the rod portion 211. The bottom portion 2120 is connected to one axial end of the rod portion 211, and the first side portion 213 and the second side portion 214 are both connected to the bottom portion 2120 and are provided opposite each other along the longitudinal direction D1 of the first movable contactor 410a. A first through hole 2131 is provided in the first side portion 213, and a second through hole 2141 is provided in the second side portion 214. The first movable contactor 410a and the elastic member 500 are both bored in the first through hole 2131 and the second through hole 2141. The first movable contactor 410a is movable between a third position and a fourth position relative to the first through hole 2131 and the second through hole 2141 along the axial direction of the rod portion 211 (i.e., the movement direction D3 of the push rod mechanism 20). In the third position, the first movable contactor 410a abuts against the hole wall of the first through hole 2131 and the hole wall of the second through hole 2141. The first elastic portion 510 abuts between the bottom portion 2120 and the first movable contactor 410a and is used to apply an elastic force to the first movable contactor 410a to move it toward the third position. The connecting portion 5111 of the first elastic portion 510 is connected to the first movable contactor 410a, and the protrusion 5122 of the first bent portion 5121 of the first elastic portion 510 abuts against the bottom portion 2120.

[0070] When the push rod mechanism 20 is in the first position, the first movable contactor 410a is in the fourth position, and when the push rod mechanism 20 is in the second position, the first movable contactor 410a is in the third position.

[0071] During the closing process of the first contact assembly 40a of the relay, the push rod 210 moves the first movable contact 410a toward the first fixed contact 420a. Before the first movable contact 410a contacts the first fixed contact 420a, the first elastic portion 510 causes the first movable contact 410a to abut against the wall of the first through hole 2131 and the wall of the second through hole 2141, respectively, and is positioned at the third position. When the first movable contactor 410a comes into contact with the first fixed contactor 420a, since the first fixed contactor 420a is fixedly attached to the base 10, the first movable contactor 410a is locked by the first fixed contactor 420a and cannot move any further; at this time, the push rod 210 continues to move, and the first elastic arm 512 of the first elastic part 510 is deformed and gradually compressed until the overtravel is completed; at this time, the first movable contactor 410a is located at a fourth position relative to the first through hole 2131 and the second through hole 2141, and the push rod mechanism 20 is located at the first position. During the process of the push rod mechanism 20 moving from the second position to the first position, the second elastic arm 522 of the second elastic part 520 changes from a compressed and deformed state to a state in which the second elastic arm 522 contacts the stopper part 150 of the base 10, and further to a state in which the second elastic arm 522 is separated from the stopper part 150 of the base 10.

[0072] During the separation process of the first contact assembly 40a of the relay, the process in which the push rod 210 moves in a direction away from the first fixed contact 420a can be divided into two stages. In the first stage, the push rod 210 moves, but the first movable contact 410a does not move with the push rod 210. In the first stage, the first movable contact 410a moves from the fourth position to the third position relative to the first through hole 2131 and the second through hole 2141. At the start of the second stage, the first movable contact 410a has already moved to the third position relative to the first through hole 2131 and the second through hole 2141, and at this time, the first movable contact 410a abuts against the hole walls of the first through hole 2131 and the second through hole 2141, respectively. Thereafter, the first movable contact 410a is moved along with the movement of the push rod 210, and the first movable contact 410a is separated from the first fixed contact 420a. In the second stage, when the push rod 210 moves the first movable contact 410a, the first movable contact 410a abuts against the hole wall of the first through hole 2131 and the hole wall of the second through hole 2141, respectively, and therefore the push rod 210 acts on the first movable contact 410a via the first side portion 213 and the second side portion 214, which corresponds to separating the first movable contact 410a from the first fixed contact 420a.

[0073] In the process of the push rod mechanism 20 moving the first movable contact 410a to the second position, the second elastic arm 522 of the second elastic part 520 first comes into contact with the stopper part 150 of the base 10, and as the push rod mechanism 20 moves, the second elastic arm 522 deforms and compresses until the push rod mechanism 20 moves to the second position, thereby applying an elastic force to the push rod mechanism 20.

[0074] The first elastic portion 510 and the second elastic portion 520 of the elastic member 500 are an integral structure, and the elastic member 500 and the first movable contact 410a are both drilled in the first through hole 2131 and the second through hole 2141. The first elastic portion 510 is used to apply overtravel contact pressure, and the second elastic portion 520 is used to apply an elastic force to the push rod mechanism 20 to move in the contact closing direction so as to reduce the operating voltage of the relay. Therefore, it is understood that the relay of this embodiment has a compact structure after assembly of the elastic member 500, the first movable contact 410a, and the push rod 210, and is advantageous for miniaturizing the relay, provided that the operating voltage can be flexibly adjusted.

[0075] On the other hand, the position where the hole wall of the first through hole 2131 abuts against the first movable contactor 410a corresponds to one force application point, and the position where the hole wall of the second through hole 2141 abuts against the first movable contactor 410a corresponds to another force application point. By providing two force application points and arranging the two force application points along the longitudinal direction D1 of the first movable contactor 410a, the area over which the first movable contactor 410a receives the tensile force from the push rod 210 becomes larger, thereby making the movement of the first movable contactor 410a by the push rod 210 smoother.

[0076] Continuing to refer to Figures 9 to 12, the push rod 210 further includes a spacer portion 215, a third side portion 216, and a fourth side portion 217, wherein the third side portion 216 is connected to the end opposite the bottom 2120 of the first side portion 213, the fourth side portion 217 is connected to the end opposite the bottom 2120 of the second side portion 214, and the spacer portion 215 is provided between the third side portion 216 and the fourth side portion 217. The third side portion 216 has a third through hole 2161, and the fourth side portion 217 has a fourth through hole 2171. The second movable contactor 410b and the other elastic members 500 are bored through the third through hole 2161 and the fourth through hole 2171. The third through hole 2161 is located on one side of the spacer portion 215 along the axial direction of the rod portion 211, and the first through hole 2131 is located on the other side of the spacer portion 215 along the axial direction of the rod portion 211. The fourth through hole 2171 is located on one side of the spacer portion 215 along the axial direction of the rod portion 211, and the second through hole 2141 is located on the other side of the spacer portion 215 along the axial direction of the rod portion 211. The second movable contactor 410b is movable between a fifth position and a sixth position relative to the third through hole 2161 and the fourth through hole 2171 along the axial direction of the rod portion 211. At the fifth position, the second movable contactor 410b abuts against the hole walls of the third through hole 2161 and the fourth through hole 2171, respectively. Another elastic member 500 is provided between the second movable contactor 410b and the spacer portion 215, and is used to apply an elastic force to the second movable contactor 410b to move it toward the fifth position.

[0077] The operation process by which the push rod 210 brings the second movable contact 410b into contact with or separates the first fixed contact 420a is the same as that of the first contact assembly 40a, and therefore will not be described again here.

[0078] Therefore, the position where the hole wall of the third through hole 2161 abuts against the second movable contactor 410b corresponds to one force application point, and the position where the hole wall of the fourth through hole 2171 abuts against the second movable contactor 410b corresponds to another force application point.By providing two force application points and arranging the two force application points along the longitudinal direction D1 of the second movable contactor 410b, the area over which the second movable contactor 410b receives the tensile force from the push rod 210 becomes larger, thereby making the movement of the second movable contactor 410b by the push rod 210 smoother.

[0079] It should be understood that the various examples / embodiments provided in the present disclosure can be combined with each other without causing any contradiction, and the description thereof will be omitted here.

[0080] In conventional magnetic retention relays, the magnetic circuit structure is often H-shaped, and the contact system is hinge-type. If the contact gap needs to be increased, i.e., if the contact heads need to be separated by a larger distance, the length of the movable contact section must be sufficient and sufficient space must be provided. This increases the volume of the relay and the length of the movable contact section, which also increases material costs.

[0081] The embodiments of the present disclosure further provide a relay to solve the problems of increased volume and increased material cost of the relay in the prior art.

[0082] A relay according to an embodiment of the present disclosure includes a base, a push rod mechanism, and a contact assembly, the push rod mechanism including a push rod and an iron core, the push rod including a mounting portion and a rod portion, the mounting portion connected to one axial end of the rod portion, the iron core fixedly connected to the rod portion, the push rod and the iron core being linearly movable relative to the base, the contact assembly including a fixed contact and a movable contact, the fixed contact being fixedly connected to the base and including a contact end and a drawn-out end, the drawn-out end being attached to the mounting portion, such that the push rod mechanism can move the movable contact to contact or separate from the contact end, the drawn-out end protruding from a bottom surface of the base for electrical connection to an external circuit, and the drawn-out end having a width smaller than that of the contact end.

[0083] According to some embodiments of the present disclosure, the fixed contact is inserted into the base along an insertion direction, the insertion direction being perpendicular to the movement direction of the push rod mechanism, and the insertion direction being perpendicular to the longitudinal direction of the movable contact.

[0084] According to some embodiments of the present disclosure, the protruding direction of the withdrawal end is parallel to the insertion direction.

[0085] According to some embodiments of the present disclosure, the fixed contact includes two pull-out ends, both of which protrude from the bottom surface of the base, and the protruding direction of each pull-out end is perpendicular to the movement direction of the push rod mechanism.

[0086] According to some embodiments of the present disclosure, the two lead-out ends are arranged side by side along the longitudinal direction of the movable contact.

[0087] According to some embodiments of the present disclosure, the number of the contact assemblies is plural, and the plural contact assemblies are arranged sequentially along the movement direction of the push rod mechanism.

[0088] According to some embodiments of the present disclosure, the base has a mounting hole penetrating its inner surface and bottom surface, and the hole wall of the mounting hole has a positioning wall structure and a gap wall structure.

[0089] The fixed contactor is drilled into the mounting hole, and a portion of the outer wall surface of the fixed contactor abuts against the positioning wall structure, with a gap between the portion of the outer wall surface of the fixed contactor and the gap wall structure, and a positioning adhesive is filled into the gap.

[0090] According to some embodiments of the present disclosure, the fixed contact is an interference fit with the positioning wall structure.

[0091] According to some embodiments of the present disclosure, the positioning wall structure includes a first positioning wall and a second positioning wall, and the first positioning wall and the second positioning wall are arranged opposite each other along the positioning direction.

[0092] According to some embodiments of the present disclosure, the fixed contact includes two pull-out ends, both of which protrude from the bottom surface of the base, and the protruding direction of each pull-out end is perpendicular to the movement direction of the push rod mechanism; the base has mounting holes corresponding to the two pull-out ends, and the two pull-out ends are drilled correspondingly within the two mounting holes, and each pull-out end abuts the positioning wall structure of the corresponding mounting hole and has a gap between it and the gap wall structure.

[0093] According to some embodiments of the present disclosure, the external circuitry includes a circuit board, and the lead-out end is welded to the circuit board.

[0094] An embodiment of the above invention has at least the following advantages or beneficial effects.

[0095] In the relay of the embodiment of the present disclosure, the push rod mechanism is linearly movable relative to the base, forming a direct-acting magnetic circuit structure. Thus, the distance by which the movable contact of the contact assembly separates from the fixed contact is the contact gap. For a given relay volume, the contact gap of the embodiment of the present disclosure is much larger than that of the prior art. At the same time, the wide design of the contact ends allows heat to be dispersed quickly and evenly at the contact ends, preventing excessive heat from affecting the inside of the relay.

[0096] At the same time, the direction in which the pulled-out end of the fixed contact protrudes from the bottom surface of the base is perpendicular to the direction of movement of the push rod mechanism, which significantly reduces the material cost of the contact assembly in accordance with the direct-acting magnetic circuit and allows multiple sets of contact assemblies to be provided in the direction of movement of the push rod mechanism.

[0097] The details will be explained below with reference to the drawings.

[0098] 19 to 21, Fig. 19 shows a top view of a relay according to an embodiment of the present disclosure with the upper cover omitted, Fig. 20 shows a cross-sectional view along line FF in Fig. 19, and Fig. 21 shows a cross-sectional view along line GG in Fig. 20. The relay according to the embodiment of the present disclosure includes a base 10, a push rod mechanism 20, a magnetic circuit mechanism 30, and a contact assembly 40. The push rod mechanism 20, the magnetic circuit mechanism 30, and the contact assembly 40 are provided on the base 10, and the magnetic circuit mechanism 30 controls the contact or separation of the contacts of the contact assembly 40 via the push rod mechanism 20.

[0099] It is understood that the terms "comprise," "have," and variations thereof in the embodiments of the present disclosure are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or assemblies inherent to the process, method, product, or apparatus.

[0100] The magnetic circuit mechanism 30 includes a yoke structure 310, a bobbin 320, and a coil 330. The yoke structure 310 forms a chamber, and the bobbin 320 and the coil 330 are both provided within the chamber of the yoke structure 310. The coil 330 is wound around the outer periphery of the bobbin 320 to form a magnetic control circuit. The bobbin 320 is provided with a central hole 321 in the direction of contact separation of the contacts of the contact assembly 40, into which one end of the push rod mechanism 20 is drilled.

[0101] The yoke plate 311 has a through hole 3111 through which the push rod mechanism 20 is to be drilled.

[0102] Of course, in other embodiments, the yoke structure 310 may include a cylindrical yoke and a yoke plate 311, which are connected to form an annular yoke.

[0103] The magnetic circuit mechanism 30 further includes two permanent magnets 340, which are mounted on the bobbin 320 and positioned on either side of the moving direction D3 of the push rod mechanism 20. The two permanent magnets 340 form a magnetically holding magnetic circuit structure, which is advantageous for reducing power consumption costs, extending the service life, and improving stability.

[0104] Of course, in other embodiments, permanent magnet 340 may not be included.

[0105] Continuing to refer to Figures 19 and 20, the contact assembly 40 includes a movable contact 410 and a fixed contact 420, the fixed contact 420 is fixedly attached to the base 10, and the movable contact 410 is attached to the push rod mechanism 20 and moves in conjunction with the push rod mechanism 20.

[0106] In this embodiment, there are two sets of contact assemblies 40, and the two sets of contact assemblies 40 are arranged along the movement direction D3 of the push rod mechanism 20.

[0107] Of course, in other embodiments, the contact assemblies 40 may be a single set or other quantities.

[0108] Both ends of the movable contactor 410 in the longitudinal direction are movable contacts, and the movable contacts may protrude from other parts of the movable contactor 410 or may be flush with other parts. The part where the fixed contactor 420 and the movable contactor 410 come into contact is a fixed contact, and the fixed contact may protrude from other parts of the fixed contactor 420 or may be flush with other parts.

[0109] As an example, the movable contactor 410 includes a movable contactor body 411 and a movable contact 412, and the movable contactor body 411 and the movable contact 412 have separate structures, and the movable contactor body 412 and the movable contactor body 411 may be connected by crimping, but this is not limited to this. The fixed contactor 420 includes a fixed contactor body 423 and a fixed contact 424, and the fixed contactor body 423 and the fixed contact 424 have separate structures, and the fixed contactor body 423 and the fixed contact 424 may be connected by crimping, but this is not limited to this.

[0110] Of course, in other embodiments, the movable contact 412 and the movable contactor body 411 may be integrally formed, and the fixed contact 424 and the fixed contactor body 423 may be integrally formed.

[0111] The number of fixed contacts 420 in the contact assembly 40 may be two, and the two fixed contacts 420 are arranged along the longitudinal direction of the movable contact 410, and both longitudinal ends of the movable contact 410 are used to contact or separate from the two fixed contacts 420, respectively, thereby forming the contact assembly 40 in a bridge type.

[0112] 21 , the push rod mechanism 20 is linearly movable relative to the base 10, and includes a push rod 210 and an iron core 220, with the iron core 220 connected to the push rod 210. The iron core 220 is movable in the direction of contact contact or separation by a magnetic control circuit formed by a coil 330, and furthermore, by moving the push rod 210, the contact contact or separation of the contacts of the contact assembly 40 is controlled. A movable contactor 410 of the contact assembly 40 is provided on the push rod 210.

[0113] The push rod 210 includes an attachment portion 212 and a rod portion 211, and the attachment portion 212 is connected to one axial end of the rod portion 211. The movable contactor 410 is provided on the attachment portion 212, and the iron core 220 is fixedly connected to the rod portion 211. The direction of contact or separation between the fixed contactor 420 and the movable contactor 410 is parallel to the moving direction D3 of the push rod mechanism 20. In the embodiment of the present disclosure, the relay is a direct acting magnetic circuit.

[0114] As shown in Figures 20, 22, and 23, Figure 22 shows an exploded schematic view of the fixed contact 420 and the fixed contact 424 according to an embodiment of the present disclosure. Figure 23 shows a schematic view of the contact assembly 40 and the push rod 210 after assembly. The fixed contact 420 includes a contact end 421 and a pull-out end 422. The contact end 421 is provided with a fixed contact 424. The fixed contact 424 on the contact end 421 is used to contact or separate from the movable contact of the movable contact 410. The pull-out end 422 protrudes from the bottom surface 101 of the base 10 and is used for electrical connection to an external circuit. The protruding direction D5 of the pull-out end 422 is perpendicular to the moving direction D3 of the push rod mechanism.

[0115] In the relay of the embodiment of the present disclosure, the push rod 210 and the iron core 220 of the push rod mechanism 20 are both linearly movable relative to the base 10, thereby forming a direct-acting magnetic circuit structure. Thus, the distance by which the movable contact 410 of the contact assembly 40 separates from the fixed contact 420 is the contact gap, and for a given relay volume, the contact gap of the embodiment of the present disclosure is much larger than that of the prior art. At the same time, the direction in which the drawn-out end 422 of the fixed contact 420 protrudes from the bottom surface 101 of the base 10 is perpendicular to the movement direction D3 of the push rod mechanism 20. This significantly reduces the material cost of the contact assembly to accommodate the direct-acting magnetic circuit, and allows multiple sets of contact assemblies 40 to be installed in the movement direction D3 of the push rod mechanism 20.

[0116] The bottom surface 101 of the base 10 refers to the surface of the base 10 facing the circuit board when the relay is mounted on the circuit board.

[0117] The width W1 of the lead-out end 422 is smaller than the width W2 of the contact end 421. Designing the lead-out end 422 to be narrow is advantageous for reducing the heat conduction rate of the fixed contact 420 and improving the welding performance of the large-capacity pin, making it easier to electrically connect the lead-out end 422 to an external circuit. At the same time, designing the width W2 of the contact end 421 to be wide allows heat to be dispersed quickly and evenly at the contact end 421, preventing excessive heat from affecting the inside of the relay.

[0118] The "width" in the width W1 of the drawn-out end 422 and the width W2 of the contact end 421 may be understood as the respective dimensions of the drawn-out end 422 and the contact end 421 along the longitudinal direction D1 of the movable contactor 410. Also, along the longitudinal direction D1 of the movable contactor 410, the maximum width W1 of the drawn-out end 422 must be smaller than the width W2 of the contact end 421.

[0119] It is understood that the external circuit may include a circuit board (not shown), and the electrical connection between the lead-out end 422 of the fixed contact 420 and the circuit board may be by welding. Of course, the lead-out end 422 of the fixed contact 420 and the external circuit may also be connected by insertion.

[0120] 22 and 23, the fixed contact 420 includes two extended ends 422, both of which protrude from the bottom surface 101 of the base 10, and the protruding direction D5 of each extended end 422 is perpendicular to the moving direction D3 of the push rod mechanism 20.

[0121] In this embodiment, the two lead-out ends 422 are both connected to the contact end 421 of the fixed contact 420 to form a branched structure, which further reduces the heat conduction rate of the fixed contact 420 and improves the welding performance of the large-capacity pin.

[0122] As shown in Fig. 24, Fig. 24 shows another schematic diagram of a relay according to an embodiment of the present disclosure, with the bottom surface 101 of the base 10 facing upward. The two drawn-out ends 422 of the fixed contact 420 are arranged side by side along the longitudinal direction D1 of the movable contact 410.

[0123] 20, 23, and 24, the contact assembly 40 includes a pair of fixed contacts 420 and a movable contact 410, and the pair of fixed contacts 420 are arranged along the longitudinal direction D1 of the movable contact 410. Both ends of the movable contact 410 in the longitudinal direction D1 are used to contact or separate from the contact ends 421 of the pair of fixed contacts 420, respectively.

[0124] In this embodiment, both ends of the movable contact 410 in the longitudinal direction D1 are in contact with or separated from the contact ends 421 of a pair of fixed contacts 420, respectively, to form a bridge-type contact system.

[0125] 24 , as an example, a relay according to an embodiment of the present disclosure includes two sets of contact assemblies 40, and each set of contact assemblies 40 includes two fixed contacts 420 and one movable contact 410. Therefore, in the movement direction D3 of the push rod mechanism 20, two rows of pull-out ends 422 protrude from the bottom surface 101 of the base 10, and in the longitudinal direction D1 of the movable contacts 410, each row of pull-out ends 422 includes four pull-out ends 422.

[0126] At the same time, the pin 331 of the coil also protrudes from the bottom surface 101 of the base 10, and the protruding directions of the pin 331 of the coil and the lead-out end 422 of the fixed contact 420 are the same, so that the welding process can be carried out in the same direction.

[0127] Furthermore, the auxiliary contact lead-out end 710 also protrudes from the bottom surface 101 of the base 10, and the auxiliary contact lead-out end 710 and the lead-out end 422 of the fixed contact 420 protrude in the same direction. Furthermore, the lead-out end 422 of the fixed contact 420, the coil pin 331, and the auxiliary contact lead-out end 710 can be welded simultaneously in the same direction, improving assembly efficiency.

[0128] Referring back to FIG. 20, the fixed contact 420 is inserted into the base 10 along an insertion direction D4 perpendicular to the movement direction D3 of the push rod mechanism 20, and the insertion direction D4 is perpendicular to the longitudinal direction D1 of the movable contact 410.

[0129] The protruding direction D5 of the drawn-out end 422 of the fixed contact 420 is parallel to the insertion direction D4.

[0130] As shown in Figures 25 and 26, Figure 25 shows a cross-sectional view taken along line HH in Figure 20. Figure 26 shows a partially enlarged view of part X1 in Figure 25. The base 10 has a mounting hole 110 penetrating its inner surface and bottom surface 101, and the hole wall of the mounting hole 110 has a positioning wall structure 111 and a gap wall structure 112. The fixed contact 420 is drilled in the mounting hole 110, and a portion of the outer wall surface of the fixed contact 420 abuts against the positioning wall structure 111, leaving a gap between the portion of the outer wall surface of the fixed contact 420 and the gap wall structure 112, with a positioning adhesive filled in the gap.

[0131] The hole wall of the mounting hole 110 of the base 10 has a positioning wall structure 111 and a gap wall structure 112, and when the fixed contact 420 is assembled to the base 10, the fixed contact 420 is drilled into the mounting hole 110. On the one hand, a part of the outer wall surface of the fixed contact 420 abuts against the positioning wall structure 111, thereby realizing preliminary positioning of the fixed contact 420. On the other hand, since there is a gap between the part of the outer wall surface of the fixed contact 420 and the gap wall structure 112, a positioning adhesive can be filled into this gap, further increasing the positioning strength between the fixed contact 420 and the base 10.

[0132] As can be seen from this, the relay of the embodiment of the present disclosure first achieves preliminary positioning by the positioning wall structure 111 of the fixed contact 420 and the mounting hole 110, and then fills the gap between the fixed contact 420 and the gap wall structure 112 of the mounting hole 110 with positioning adhesive, thereby completing the sealing assembly between the fixed contact 420 and the base 10. Compared with the prior art, the present disclosure reduces the adhesive application process, effectively reducing costs and improving assembly efficiency.

[0133] As an example, the base 10 has mounting holes 110 corresponding to the two lead-out ends 422 of the fixed contact 420, and the two lead-out ends 422 are correspondingly drilled within the two mounting holes 110, and each lead-out end 422 abuts against the positioning wall structure 111 of the corresponding mounting hole 110 and has a gap between it and the gap wall structure 112.

[0134] The positioning wall structure 111 includes a first positioning wall 113 and a second positioning wall 114, which are arranged opposite each other along the positioning direction D6. The first positioning wall 113 and the second positioning wall 114 abut against the lead-out ends 422 of the fixed contacts 420, respectively, thereby limiting the degree of freedom of the fixed contacts 420 and the base 10 in the positioning direction D6.

[0135] Here, the positioning direction D6 may be the movement direction D3 of the push rod mechanism.

[0136] It is understood that the shapes of the first positioning wall 113 and the second positioning wall 114 are adapted to the outer shape of the lead-out end 422. For example, if the cross-sectional shape of the lead-out end 422 is rectangular, the first positioning wall 113 and the second positioning wall 114 may be flat. Of course, in other embodiments, if the cross-sectional shape of the lead-out end 422 is circular, the shapes of the first positioning wall 113 and the second positioning wall 114 may be arcuate surfaces.

[0137] The lead-out end 422 of the fixed contact 420 is interference-fitted into the positioning wall structure 111. In this embodiment, the lead-out end 422 is positioned and fitted into the first positioning wall 113 and the second positioning wall 114, respectively.

[0138] It should be understood that the various examples / embodiments provided in the present disclosure can be combined with each other without causing any contradiction, and the description thereof will be omitted here.

[0139] 27 and 28, a push rod mechanism of a relay in the prior art includes a push rod 1000 and two iron cores 2000, where the push rod 1000 is made of a plastic material and has a bore 1100, and the iron cores 2000 are made of a metal material and each iron core 2000 has a protruding post 2100. When the two iron cores 2000 are assembled to the push rod 1000, the protruding posts 2100 of each iron core 2000 are both inserted into the bore 1100, and the protruding posts 2100 are tightly fitted into the bore 1100.

[0140] However, because the push rod 1000 is made of plastic and the core 2000 is made of metal, the metal protruding post 2100 and the plastic drilled hole 1100 do not fit together well, and the connection between the push rod 1000 and the core 2000 is not strong enough, making them prone to loosening. If the push rod 1000 and the core 2000 loosen, the core 2000 comes into contact with the inner wall surface of the bobbin, increasing the friction between them and changing the overlapping surface between the core 2000 and the yoke plate, thereby affecting the magnetic circuit of the relay. Furthermore, if a permanent magnet is provided on the side of the core 2000, the magnetic attraction from the permanent magnet makes the core 2000 more likely to loosen from the push rod 1000.

[0141] The embodiments of the present disclosure further provide a relay and its push rod mechanism that can improve the strength of the connection between the iron core and the push rod and prevent the iron core from coming off the push rod.

[0142] A push rod mechanism of a relay according to an embodiment of the present disclosure includes a push rod and an iron core assembly. The push rod includes a rod portion and a mounting portion. The mounting portion is provided at one end of the rod portion and is used to mount a movable contact of the relay. The iron core assembly is attached to the rod portion, and a limit structure is provided between the iron core assembly and the rod portion. The limit structure is used to limit relative movement of the iron core assembly and the rod portion along the axial direction of the rod portion. The iron core assembly includes a first iron core and a second iron core. The first iron core and the second iron core are connected by a first interference-fit structure. The first interference-fit structure includes a first connection portion formed on the first iron core and a second connection portion formed on the second iron core. The first connection portion is interference-fitted to the second connection portion.

[0143] According to some embodiments of the present disclosure, the rod portion has a first through hole formed therein, and the first interference-fit structure is drilled into the first through hole.

[0144] According to some embodiments of the present disclosure, the first interference-fit structure abuts against an inner wall surface of the first through-hole to form the limit structure.

[0145] According to some embodiments of the present disclosure, the first iron core further includes a first substrate, the first connecting portion protruding from one side of the first substrate, the second iron core further includes a second substrate, the second connecting portion protruding from one side of the second substrate, and the first substrate and the second substrate are stacked on opposite sides of the rod portion, respectively.

[0146] According to some embodiments of the present disclosure, the first connection portion includes a first protruding boss and a second protruding boss, the first protruding boss being provided on a side of the first substrate facing the rod portion, the second protruding boss being provided on a side of the first protruding boss facing away from the first substrate, a hole being provided on the side of the second connection portion facing away from the second substrate, the second protruding boss being inserted into the hole and being tightly fitted into the hole, and the side of the first protruding boss facing away from the first substrate abutting the side of the second connection portion facing away from the second substrate.

[0147] According to some embodiments of the present disclosure, the holes are through holes or blind holes.

[0148] According to some embodiments of the present disclosure, the first iron core and the second iron core are also connected by a second interference fit structure, the second interference fit structure including a third connection portion formed on the first iron core and a fourth connection portion formed on the second iron core, and the third connection portion is interference fitted into the fourth connection portion.

[0149] According to some embodiments of the present disclosure, the rod portion further has a second through-hole, and the second interference-fit structure is drilled in the second through-hole.

[0150] According to some embodiments of the present disclosure, there is a gap between the second interference-fit structure and the inner wall surface of the second through hole.

[0151] According to some embodiments of the present disclosure, the first iron core and the second iron core engage with each other to form a sleeve structure, the sleeve structure is fitted to the outer periphery of the rod portion, and the first interference fit structure is provided on the outer periphery of the rod portion.

[0152] According to some embodiments of the present disclosure, the sleeve structure is a fully closed structure or a partially closed structure.

[0153] According to some embodiments of the present disclosure, the first connecting portion includes a protruding block, the second connecting portion includes a recessed groove, and the protruding block is inserted into the recessed groove to form an interference fit.

[0154] According to some embodiments of the present disclosure, the limit structure includes a limit post and a limit hole, the limit post is provided in both the first iron core and the second iron core, the limit hole is provided in the rod portion, and the limit post is drilled into the limit hole.

[0155] According to some embodiments of the present disclosure, the push rod is made of a plastic material, and the first iron core and the second iron core are both made of a metal material, and / or the first iron core and the second iron core are made of the same material.

[0156] A relay according to an embodiment of the present disclosure includes any of the push rod mechanisms described above.

[0157] According to some embodiments of the present disclosure, the relay further includes a permanent magnet, and the permanent magnet is provided on the side facing away from the rod portion of the first iron core of the push rod mechanism and / or on the side facing away from the rod portion of the second iron core.

[0158] An embodiment of the above invention has at least the following advantages or beneficial effects.

[0159] In the push rod mechanism of the embodiment of the present disclosure, the first iron core and the second iron core are interference-fitted using a first interference-fit structure, thereby enabling an interference-fit connection between the first iron core and the second iron core and further strengthening the connection between them. This prevents the iron core from contacting the inner wall surface of the bobbin, which would affect the movement of the push rod mechanism, while ensuring that the overlapping surface between the iron core and the yoke plate is maintained in its initial state, preventing the magnetic circuit of the relay from being affected. Furthermore, even if a permanent magnet is provided on the side of the iron core, the magnetic attraction force from the permanent magnet makes it difficult for the iron core to come loose from the push rod.

[0160] The details will be explained below with reference to the drawings.

[0161] 29 to 31, Fig. 29 shows a top view of a relay according to an embodiment of the present disclosure with the upper cover omitted, Fig. 30 shows a cross-sectional view taken along line II in Fig. 29, and Fig. 31 shows a cross-sectional view taken along line JJ in Fig. 30. The relay according to the embodiment of the present disclosure includes a base 10, a push rod mechanism 20, a magnetic circuit mechanism 30, and a contact assembly 40. The push rod mechanism 20, the magnetic circuit mechanism 30, and the contact assembly 40 are provided on the base 10, and the magnetic circuit mechanism 30 controls the contact or separation of the contacts of the contact assembly 40 via the push rod mechanism 20.

[0162] The magnetic circuit mechanism 30 includes a yoke structure 310, a bobbin 320, and a coil 330. The yoke structure 310 forms a chamber, and the bobbin 320 and the coil 330 are both provided within the chamber of the yoke structure 310. The coil 330 is wound around the outer periphery of the bobbin 320 to form a magnetic control circuit. The bobbin 320 is provided with a central hole 321 in the direction of contact separation of the contacts of the contact assembly 40, into which one end of the push rod mechanism 20 is drilled.

[0163] For example, the yoke structure 310 includes a yoke plate 311 and a U-shaped yoke 312, which are connected to form an annular yoke. The yoke plate 311 has a through-hole 3111 through which the push rod mechanism 20 is inserted.

[0164] Of course, in other embodiments, the yoke structure 310 may include a cylindrical yoke and a yoke plate 311, which are connected to form an annular yoke.

[0165] The magnetic circuit mechanism 30 further includes two permanent magnets 340, which are mounted on the bobbin 320 and positioned on either side of the moving direction of the push rod mechanism 20. A yoke structure 310 is mounted on the exterior of the bobbin 320 and the permanent magnets 340 to form a magnetic circuit structure for magnetic retention.

[0166] Of course, in other embodiments, the permanent magnet 340 may not be included, but since there is no magnetic circuit structure for magnetic retention, the power consumption cost is high, the service life is short, and the overall performance stability is poor.

[0167] Continuing to refer to Figures 29 to 31, the contact assembly 40 includes a movable contact 410 and a fixed contact 420, the fixed contact 420 is fixedly attached to the base 10, and the movable contact 410 is attached to the push rod mechanism 20 and moves in conjunction with the push rod mechanism 20.

[0168] In this embodiment, there are two sets of contact assemblies 40, and the two sets of contact assemblies 40 are arranged along the direction of movement of the push rod mechanism 20.

[0169] Of course, in other embodiments, the contact assemblies 40 may be a single set or other quantities.

[0170] Both ends of the movable contactor 410 in the longitudinal direction are movable contacts, and the movable contacts may protrude from other parts of the movable contactor 410 or may be flush with other parts. The part where the fixed contactor 420 and the movable contactor 410 come into contact is a fixed contact, and the fixed contact may protrude from other parts of the fixed contactor 420 or may be flush with other parts.

[0171] As an example, the movable contactor 410 includes a movable contactor body 411 and a movable contact 412, and the movable contactor body 411 and the movable contact 412 have separate structures, and the movable contactor body 412 and the movable contactor body 411 may be connected by crimping, but this is not limited to this. The fixed contactor 420 includes a fixed contactor body 423 and a fixed contact 424, and the fixed contactor body 423 and the fixed contact 424 have separate structures, and the fixed contactor body 423 and the fixed contact 424 may be connected by crimping, but this is not limited to this.

[0172] Of course, in other embodiments, the movable contact 412 and the movable contactor body 411 may be integrally formed, and the fixed contact 424 and the fixed contactor body 423 may be integrally formed.

[0173] 32 to 34, FIG. 32 shows a top view of push rod mechanism 20 according to the first embodiment of the present disclosure. FIG. 33 shows an exploded schematic view of FIG. 32. FIG. 34 shows a cross-sectional view along line KK in FIG. 32. Push rod mechanism 20 according to the embodiment of the present disclosure includes push rod 210 and iron core assembly 2200. Iron core assembly 2200 is attached to rod portion 211. Limit structure 250 is provided between iron core assembly 2200 and rod portion 211. Limit structure 250 is used to limit relative movement between iron core assembly 2200 and rod portion 211 along the axial direction of rod portion 211.

[0174] The push rod 210 may be made of a plastic material, and includes a rod portion 211 and an attachment portion 212, the attachment portion 212 being provided at one end of the rod portion 211 and used to attach the movable contact 410 of the relay, and the rod portion 211 being drilled into the through hole 3111 of the yoke plate 311.

[0175] The core assembly 2200 includes a first core 230 and a second core 240, both of which are made of metal, and the materials of the first core 230 and the second core 240 may be the same or different. By providing the core assembly 2200 as the spaced apart first core 230 and second core 240, assembly of the core assembly 2200 and the push rod 210 becomes easier and less costly.

[0176] The first iron core 230 and the second iron core 240 are connected by a first interference fit structure 221, which includes a first connection portion 232 formed on the first iron core 230 and a second connection portion 242 formed on the second iron core 240, and the first connection portion 232 is interference fitted into the second connection portion 242.

[0177] The push rod mechanism 20 of the embodiment of the present disclosure achieves an interference fit by using a first interference fit structure 221 between the first iron core 230 and the second iron core 240, thereby connecting the first iron core 230 and the second iron core 240 with an interference fit and further strengthening the connection between the first iron core 230 and the second iron core 240. This prevents the iron core from contacting the inner wall surface of the bobbin, which would affect the movement of the push rod mechanism, while ensuring that the overlapping surface between the iron core and the yoke plate is maintained in its initial state, preventing the magnetic circuit of the relay from being affected. Furthermore, even if a permanent magnet is provided on the side of the iron core, the magnetic attractive force from the permanent magnet makes it difficult for the iron core to come loose from the push rod.

[0178] The rod portion 211 has a first through hole 2111 formed therein, and the first interference fit structure 221 is formed in the first through hole 2111. The first interference fit structure 221 abuts against the inner wall surface of the first through hole 2111 to form the limit structure 250.

[0179] In this embodiment, the first interference-fit structure 221 not only serves to connect the first iron core 230 and the second iron core 240, but also serves as a position restriction by abutting against the inner wall surface of the first through hole 2111. Specifically, the outer diameter of the first interference-fit structure 221 is approximately equal to the diameter of the first through hole 2111, so the first interference-fit structure 221 can be inserted into the first through hole 2111 and abut against the inner wall surface of the first through hole 2111, thereby serving as a position restriction. When the first iron core 230 and the second iron core 240 are driven to move by the magnetic circuit of the coil 330, the first interference-fit structure 221 can move the push rod 210 in an interlocking manner.

[0180] It should be understood that the shape of the first through hole 2111 can have various embodiments, for example, the first through hole 2111 can be a circular hole, a rectangular hole, an elliptical hole, etc., and accordingly, the outer shape of the first interference fit structure 221 will match the shape of the first through hole 2111.

[0181] The first iron core 230 and the second iron core 240 are also connected by a second interference fit structure 222, which includes a third connection portion 233 formed on the first iron core 230 and a fourth connection portion 243 formed on the second iron core 240, and the third connection portion 233 is interference fitted into the fourth connection portion 243.

[0182] A first interference fit structure 221 and a second interference fit structure 222 are provided between the first iron core 230 and the second iron core 240, and the two interference fit locations further increase the connection strength between the first iron core 230 and the second iron core 240 and prevent the iron cores from coming off the push rod 210. At the same time, the two interference fit locations also serve to prevent the iron cores from rotating relative to the push rod 210.

[0183] A second through hole 2112 is further formed in the rod portion 211, and a second interference fit structure 222 is drilled in the second through hole 2112. A gap exists between the second interference fit structure 222 and the inner wall surface of the second through hole 2112. The diameter dimension of the second through hole 2112 is larger than the outer diameter dimension of the second interference fit structure 222, so that a gap exists between the two, which prevents excessive positioning from failing to meet the processing requirements of the iron core or preventing the iron core from being properly attached to the push rod 210.

[0184] Regarding the relative positioning of the first through hole 2111 and the second through hole 2112, the second through hole 2112 and the first through hole 2111 may be arranged along the axial direction of the rod portion 211, but it is understood that this is not limited to this.

[0185] As shown in FIGS. 35 to 38, FIGS. 35 and 36 are schematic views of the first core 230 viewed from two different viewing angles. FIGS. 37 and 38 are schematic views of the second core 240 viewed from two different viewing angles. The first core 230 further includes a first substrate 231, and the first connecting portion 232 protrudes from one side of the first substrate 231. The second core 240 further includes a second substrate 241, and the second connecting portion 242 protrudes from one side of the second substrate 241. The first substrate 231 and the second substrate 241 are stacked on opposite sides of the rod portion 211. As an example, the first substrate 231 and the second substrate 241 are stacked on opposite sides of the rod portion 211 along the longitudinal direction of the movable contactor 410.

[0186] The first connecting portion 232 includes a first protruding boss 2321 and a second protruding boss 2322. The first protruding boss 2321 is provided on the side of the first substrate 231 facing the rod portion 211, and the second protruding boss 2322 is provided on the side of the first protruding boss 2321 facing away from the first substrate 231. A hole 2421 is provided on the side of the second connecting portion 242 facing away from the second substrate 241, and the second protruding boss 2322 is inserted into the hole 2421 and is tightly fitted into the hole 2421. The side of the first protruding boss 2321 facing away from the first substrate 231 abuts against the side of the second connecting portion 242 facing away from the second substrate 241.

[0187] It is understood that the holes 2421 may be through holes or blind holes.

[0188] The structure of the third connecting portion 233 may be the same as the structure of the first connecting portion 232, and the structure of the fourth connecting portion 243 may be the same as the structure of the second connecting portion 242, so they will not be described repeatedly here.

[0189] As shown in Figures 39 to 41, Figure 39 shows a schematic diagram of push rod mechanism 20 according to another embodiment of the present disclosure. Figure 40 shows a schematic diagram of first iron core 230 in Figure 39. Figure 41 shows a schematic diagram of second iron core 240 in Figure 39. The push rod mechanism 20 according to this embodiment is similar to the push rod mechanism 20 shown in Figure 32, and a description thereof will be omitted, but the differences are as follows.

[0190] The first iron core 230 and the second iron core 240 are both U-shaped, and the first iron core 230 and the second iron core 240 engage with each other to form a sleeve structure, which is fitted onto the outer periphery of the rod portion 211. The first iron core 230 and the second iron core 240 are connected by a first interference fit structure 221, and the first interference fit structure 221 is provided on the outer periphery of the rod portion 211.

[0191] For example, the first connecting portion 232 includes a protruding block 232a, the second connecting portion 242 includes a recessed groove 242a, and the protruding block 232a is inserted into the recessed groove 242a for a tight fit.

[0192] The limit structure 250 includes limit posts 251a and limit holes (not shown), and the first iron core 230 and the second iron core 240 are both provided with limit posts 251a, and the rod portion 211 is provided with limit holes, and the limit posts 251a are drilled into the limit holes. The limit holes may be through holes or blind holes.

[0193] The number of the first interference-fit structures 221 may be two, and the two first interference-fit structures 221 are provided symmetrically with respect to the axis of the rod portion 211 .

[0194] Of course, it is understood that a second interference fit structure 222 may be further provided between the first iron core 230 and the second iron core 240, and the second interference fit structure 222 may use an interference fit structure of a protruding block 232a and a recessed groove 242a.

[0195] The number of the second interference-fit structures 222 may be two, and the two second interference-fit structures 222 are provided symmetrically with respect to the axis of the rod portion.

[0196] As an example, the first iron core 230 and the second iron core 240 are engaged with each other to form a sleeve structure as a fully closed structure, that is, in the circumferential direction of the sleeve structure, the sleeve structure continuously surrounds the outer periphery of the rod portion 211.

[0197] As shown in Figure 42, Figure 42 shows a schematic diagram of a push rod mechanism according to another embodiment of the present disclosure. The push rod mechanism 20 of this embodiment is similar to the push rod mechanism 20 shown in Figure 39, and therefore a description thereof will be omitted, except for the following differences.

[0198] The first iron core 230 and the second iron core 240 engage with each other to form a partially closed sleeve structure. Specifically, the sleeve structure has a notch 201, and the portion of the rod portion 211 corresponding to the notch 201 is exposed from the outer circumferential surface of the sleeve structure through this notch 201.

[0199] It should be noted that the shape of the notch 201 is not particularly limited, but it is understood that, for example, the shape of the notch 201 may be elongated, and the elongated notch 201 may extend along the axial direction of the rod portion 211.

[0200] The notch 201 may be formed at the engagement point between the first iron core 230 and the second iron core 240. Of course, the notch 201 may be formed in the first iron core 230 or the second iron core 240.

[0201] As shown in Figure 43, Figure 43 is a schematic diagram of a push rod mechanism according to another embodiment of the present disclosure. The push rod mechanism 20 according to this embodiment of the present disclosure is similar to the push rod mechanism 20 shown in Figure 39, and therefore a description thereof will be omitted, with the following differences.

[0202] First core 230 and second core 240 are connected by first interference fit structure 221 but not by second interference fit structure 222 .

[0203] As shown in Figures 44 and 45, Figure 44 is a schematic diagram of a push rod mechanism according to another embodiment of the present disclosure. Figure 45 is a partial enlarged view of part X2 in Figure 44. The push rod mechanism 20 according to this embodiment of the present disclosure is similar to the push rod mechanism 20 shown in Figure 43, and therefore a description thereof will be omitted, with the following differences.

[0204] The interference fit between the protrusion block 232a and the groove 242a may be of any shape, for example, the outer surface of the protrusion block 232a has an uneven surface, and the groove wall of the groove 242a has an uneven structure that matches the outer surface of the protrusion block 232a.

[0205] As shown in Figure 46, Figure 46 shows a cross-sectional schematic diagram of a push rod mechanism according to another embodiment of the present disclosure. The push rod mechanism 20 according to this embodiment of the present disclosure is similar to the push rod mechanism 20 shown in Figure 32, and therefore a description thereof will be omitted, with the following differences.

[0206] First core 230 and second core 240 are connected by first interference fit structure 221 but not by second interference fit structure 222 .

[0207] It should be understood that the various examples / embodiments provided in the present disclosure can be combined with each other without causing any contradiction, and the description thereof will be omitted here.

[0208] 47 and 48, a push rod mechanism of a relay in the prior art includes a push rod 1000 and two iron cores 2000, where the push rod 1000 is made of a plastic material and has a bore 1100, and the iron cores 2000 are made of a metal material and each iron core 2000 has a protruding post 2100. When the two iron cores 2000 are assembled to the push rod 1000, the protruding posts 2100 of each iron core 2000 are both inserted into the bore 1100, and the protruding posts 2100 are tightly fitted into the bore 1100.

[0209] However, because the push rod 1000 is made of plastic and the core 2000 is made of metal, the metal protruding post 2100 and the plastic drilled hole 1100 do not fit together well, and the connection between the push rod 1000 and the core 2000 is not strong enough, making them prone to loosening. If the push rod 1000 and the core 2000 loosen, the core 2000 comes into contact with the inner wall surface of the bobbin, increasing the friction between them and changing the overlapping surface between the core 2000 and the yoke plate, thereby affecting the magnetic circuit of the relay. Furthermore, if a permanent magnet is provided on the side of the core 2000, the magnetic attraction from the permanent magnet makes the core 2000 more likely to loosen from the push rod 1000.

[0210] The embodiments of the present disclosure further provide a relay and its push rod mechanism that can improve the strength of the connection between the iron core and the push rod and prevent the iron core from loosening from the push rod.

[0211] A push rod mechanism of a relay according to an embodiment of the present disclosure includes a push rod, an iron core, and a loosening prevention structure, the push rod includes a rod portion and an attachment portion, the attachment portion is provided at one end of the rod portion and is used to attach a movable contact of the relay, the iron core is connected to the rod portion, and a limit structure is provided between the iron core and the rod portion, and the limit structure is used to limit relative movement between the iron core and the rod portion along the axial direction of the rod portion. The anti-loosening structure is provided between the iron core and the rod portion, and includes a first through hole and an anti-loosening member, the first through hole being opened in the iron core and penetrating the surface of the iron core facing the rod portion and the surface of the iron core facing away from the iron core, the anti-loosening member including a first through portion and a cover portion, the first through portion being connected to the rod portion and drilled into the first through hole, the cover portion being connected to the first through portion and provided on the side of the iron core facing away from the rod portion, and the cover portion covering at least a portion of the periphery of the first through hole and being used to prevent the iron core from loosening from the rod portion.

[0212] According to some embodiments of the present disclosure, the rod portion has a perforation corresponding to the position of the first through hole, and the first through portion is drilled through the first through hole and the perforation.

[0213] According to some embodiments of the present disclosure, the anti-loosening member is a rivet.

[0214] According to some embodiments of the present disclosure, an outer peripheral surface of the first penetrating portion abuts against an inner wall surface of the perforation to form the limit structure.

[0215] According to some embodiments of the present disclosure, the iron core has a first sink on the side opposite the rod portion, the first through hole penetrates the bottom of the first sink, and the lid portion is housed within the first sink.

[0216] According to some embodiments of the present disclosure, the anti-loosening member and the rod portion are of a unitary structure.

[0217] According to some embodiments of the present disclosure, the cover portion is an engaging hook, and the anti-loosening member and the iron core are engaged and connected.

[0218] According to some embodiments of the present disclosure, the limit structure comprises:

[0219] a limit protrusion provided on one of the iron core and the rod portion;

[0220] a limit groove provided in the other of the iron core and the rod portion,

[0221] The limit protrusion is used to be inserted into the limit groove.

[0222] According to some embodiments of the present disclosure, a first guide slope is provided at the joint between the inner wall surface of the first through hole and the surface of the iron core facing the rod portion, and the cover portion has a second guide slope, which is used to slidably abut against the first guide slope.

[0223] According to some embodiments of the present disclosure, the iron core and the push rod are integrally connected by injection molding.

[0224] According to some embodiments of the present disclosure, the anti-loosening structure further includes a second through hole opened in the iron core, the second through hole penetrating the surface of the iron core facing the rod portion and the surface facing away from the iron core.

[0225] The anti-loosening member further includes a second through-hole, the second through-hole being connected to the rod portion and drilled into the second through-hole, and the cover portion being connected to the first through-hole and the second through-hole.

[0226] According to some embodiments of the present disclosure, the iron core has a second sink on the side opposite to the rod portion, and both the first through hole and the second through hole communicate with the second sink.

[0227] The lid is disposed within the second sink.

[0228] According to some embodiments of the present disclosure, a surface of the cover portion facing away from the rod portion is flush with a surface of the iron core facing away from the rod portion.

[0229] A relay according to an embodiment of the present disclosure includes a push rod mechanism of any of the relays described above.

[0230] According to some embodiments of the present disclosure, the relay further includes a permanent magnet, and the permanent magnet is provided on a side facing away from the rod portion of the iron core of the push rod mechanism.

[0231] An embodiment of the above invention has at least the following advantages or beneficial effects.

[0232] In the push rod mechanism of an embodiment of the present disclosure, an anti-loosening structure is provided between the rod portion and the iron core, a first through-hole of the anti-loosening structure is connected to the rod portion and is drilled into the first through-hole of the iron core, and a cover portion is connected to the first through-hole and covers at least a portion of the periphery of the first through-hole. This allows the cover portion to prevent the iron core from loosening from the rod portion and prevent the iron core from contacting the inner wall surface of the bobbin and affecting the movement of the push rod mechanism, while ensuring that the overlapping surface between the iron core and the yoke plate is maintained in its initial state, preventing the magnetic circuit portion of the relay from being affected. Furthermore, even if a permanent magnet is provided on the side of the iron core, the magnetic attraction force from the permanent magnet makes it difficult for the iron core to loosen from the push rod.

[0233] 49 to 51, Fig. 49 shows a top view of a relay according to an embodiment of the present disclosure with the top cover omitted, Fig. 50 shows a cross-sectional view taken along line LL in Fig. 49, and Fig. 51 shows a cross-sectional view taken along line MM in Fig. 50. The relay according to the embodiment of the present disclosure includes a base 10, a push rod mechanism 20, a magnetic circuit mechanism 30, and a contact assembly 40. The push rod mechanism 20, the magnetic circuit mechanism 30, and the contact assembly 40 are provided on the base 10, and the magnetic circuit mechanism 30 controls the contact or separation of the contacts of the contact assembly 40 via the push rod mechanism 20.

[0234] The magnetic circuit mechanism 30 includes a yoke structure 310, a bobbin 320, and a coil 330. The yoke structure 310 forms a chamber, and the bobbin 320 and the coil 330 are both provided within the chamber of the yoke structure 310. The coil 330 is wound around the outer periphery of the bobbin 320 to form a magnetic control circuit. The bobbin 320 is provided with a central hole 321 in the direction of contact separation of the contacts of the contact assembly 40, into which one end of the push rod mechanism 20 is drilled.

[0235] For example, the yoke structure 310 includes a yoke plate 311 and a U-shaped yoke 312, which are connected to form an annular yoke. The yoke plate 311 has a through-hole 3111 through which the push rod mechanism 20 is inserted.

[0236] Of course, in other embodiments, the yoke structure 310 may include a cylindrical yoke and a yoke plate 311, which are connected to form an annular yoke.

[0237] The magnetic circuit mechanism 30 further includes two permanent magnets 340, which are mounted on the bobbin 320 and positioned on either side of the push rod mechanism 20 in the direction of movement. The two permanent magnets 340 form a magnetically holding magnetic circuit structure, which is advantageous for reducing power consumption costs, extending the service life, and improving stability.

[0238] Of course, in other embodiments, permanent magnet 340 may not be included.

[0239] Continuing to refer to Figures 49 to 51, the contact assembly 40 includes a movable contact 410 and a fixed contact 420, the fixed contact 420 is fixedly attached to the base 10, and the movable contact 410 is attached to the push rod mechanism 20 and moves in conjunction with the push rod mechanism 20.

[0240] In this embodiment, there are two sets of contact assemblies 40, and the two sets of contact assemblies 40 are arranged along the direction of movement of the push rod mechanism 20.

[0241] Of course, in other embodiments, the contact assemblies 40 may be a single set or other quantities.

[0242] Both ends of the movable contactor 410 in the longitudinal direction are movable contacts, and the movable contacts may protrude from other parts of the movable contactor 410 or may be flush with other parts. The part where the fixed contactor 420 and the movable contactor 410 come into contact is a fixed contact, and the fixed contact may protrude from other parts of the fixed contactor 420 or may be flush with other parts.

[0243] As an example, the movable contactor 410 includes a movable contactor body 411 and a movable contact 412, and the movable contactor body 411 and the movable contact 412 have separate structures, and the movable contactor body 412 and the movable contactor body 411 may be connected by crimping, but this is not limited to this. The fixed contactor 420 includes a fixed contactor body 423 and a fixed contact 424, and the fixed contactor body 423 and the fixed contact 424 have separate structures, and the fixed contactor body 423 and the fixed contact 424 may be connected by crimping, but this is not limited to this.

[0244] Of course, in other embodiments, the movable contact 412 and the movable contactor body 411 may be integrally formed, and the fixed contact 424 and the fixed contactor body 423 may be integrally formed.

[0245] The push rod mechanism 20 is movable relative to the base 10. The push rod mechanism 20 includes a push rod 210 and an iron core 220, which is connected to the push rod 210. The iron core 220 is movable in the direction of contact contact or separation by a magnetic control circuit formed by a coil 330, and further, by moving the push rod 210, the contact contact or separation of the contacts of the contact assembly 40 is controlled. A movable contactor 410 of the contact assembly 40 is provided on the push rod 210.

[0246] It is understood that the number of iron cores 220 in the present disclosure may be one, two, or more. In the embodiment of the present disclosure, the number of iron cores 220 is two, and the two iron cores 220 are provided on opposite sides of the push rod 210. The two spaced apart iron cores 220 are more convenient to assemble with the push rod 210 and are also less expensive.

[0247] As shown in Figures 52 to 55, Figure 52 shows a schematic diagram of push rod mechanism 20 according to the first embodiment of the present disclosure. Figure 53 shows a cross-sectional view taken along line NN in Figure 52. Figure 54 shows a partial enlarged view of portion X3 in Figure 53. Figure 55 shows a schematic diagram of iron core 220 in Figure 52. Push rod mechanism 20 includes a push rod 210, an iron core 220, and a loosening prevention structure 260.

[0248] The push rod 210 may be made of a plastic material and includes a rod portion 211 and an attachment portion 212. The attachment portion 212 is provided at one end of the rod portion 211 and is used to attach a movable contact 410 of a relay. The rod portion 211 is drilled in a through-hole 3111 of a yoke plate 311. The iron core 220 is connected to the rod portion 211, and a limit structure 250 is provided between the iron core 220 and the rod portion 211. The limit structure 250 is used to limit relative movement of the iron core 220 and the rod portion 211 along the axial direction of the rod portion 211.

[0249] The loosening prevention structure 260 is provided between the iron core 220 and the rod portion 211, and includes a first through hole 221a and a loosening prevention member 270. The first through hole 221a is opened in the iron core 220, and the first through hole 221a penetrates the surface of the iron core 220 facing the rod portion 211 and the surface of the iron core 220 facing away from the iron core 220. The loosening prevention member 270 is formed by the first through hole 221a. and a lid portion 272, wherein the first through portion 271 is connected to the rod portion 211 and is drilled in the first through hole 221a, and the lid portion 272 is connected to the first through portion 271 and is provided on the side of the iron core 220 facing away from the rod portion 211, and the lid portion 272 covers at least a part of the periphery of the first through hole 221a and is used to prevent the iron core 220 from loosening from the rod portion 211.

[0250] In the push rod mechanism 20 according to the embodiment of the present disclosure, a loosening prevention structure 260 is provided between the rod portion 211 and the iron core 220. A first through portion 271 of the loosening prevention structure 260 is connected to the rod portion 211 and is drilled in the first through hole 221 a of the iron core 220. A lid portion 272 is connected to the first through portion 271 and covers at least a portion of the periphery of the first through hole 221 a, so that the lid portion 272 prevents the iron core 220 from loosening from the rod portion 211. This prevents the iron core 220 from coming into contact with the inner wall surface of the bobbin 320 and affecting the movement of the push rod mechanism 20, while ensuring that the overlapping surface between the iron core 220 and the yoke plate 311 is maintained in its initial state, preventing the magnetic circuit portion of the relay from being affected. Furthermore, even if a permanent magnet is provided on the side surface of the iron core 220, the magnetic attractive force from the permanent magnet makes it difficult for the iron core 220 to come loose from the push rod 210.

[0251] Continuing to refer to FIGS. 52 to 55, a bore 2111a corresponding to the position of the first through hole 221a is formed in the rod portion 211, and the first through portion 271 is drilled through the first through hole 221a and the bore 2111a.

[0252] As an example, the loosening prevention member 270 is a rivet. The push rod 210 is provided with a bore 2111a, and the iron core 220 is provided with a first through-hole 221a, and the bore 2111a corresponds to the position of the first through-hole 221a, so that the rivet can be drilled into the bore 2111a and the first through-hole 221a, and further, the iron core 220 and the push rod 210 are crimped together, ensuring the connection strength between the iron core 220 and the push rod 210 and preventing loosening therebetween.

[0253] It is understood that after the iron core 220 and the push rod 210 are fastened together by the rivet, the rivet body is considered to be the first through portion 271 of the anti-loosening member 270, and the rivet head is considered to be the cover portion 272 of the anti-loosening member 270.

[0254] Also, when the number of iron cores 220 is two, the two iron cores 220 are respectively provided on opposite sides of the rod portion 211, and the rivets pass through the first through holes 221a of each iron core 220 and the perforation 2111a of the push rod 210 in sequence, and the rivet heads and bottom flanges are respectively regarded as two cover portions 272, which are used to prevent the two iron cores 220 from loosening from the rod portion 211.

[0255] Referring to Figures 54 and 55, the iron core 220 has a first sink 223 on the side opposite to the rod portion 211, the first through hole 221a passes through the bottom of the first sink 223, and the lid portion 272 is housed within the first sink 223.

[0256] By providing a first sink 223 on the side of the iron core 220 opposite to the rod portion 211, the lid portion 272 can be accommodated within the first sink 223. In this way, the anti-loosening member 270 does not protrude from the surface of the iron core 220 opposite to the rod portion 211, thereby reducing the gap between the iron core 220 and the permanent magnet 340 and further reducing the magnetic resistance of the magnetic circuit.

[0257] The outer peripheral surface of the first through portion 271 abuts against the inner wall surface of the perforation 2111 a to form the limit structure 250 .

[0258] In this embodiment, the first through-hole 271 not only prevents loosening but also restricts position. Specifically, the outer diameter of the first through-hole 271 is substantially equal to the diameter of the borehole 2111a, so that the first through-hole 271 can be inserted into the borehole 2111a or can abut against the inner wall surface of the borehole 2111a, thereby restricting position. When the iron core 220 is driven and moved by the magnetic circuit of the coil, the first through-hole 271 can move the push rod 210.

[0259] It should be understood that the shapes of the first through-holes 221a and the perforations 2111a can have various embodiments, and may be, for example, circular holes, rectangular holes, elliptical holes, etc.

[0260] The number of anti-loosening structures 260 between the iron core 220 and the rod portion 211 may be one, two, or more than two. When the number of anti-loosening structures 260 is two or more, each anti-loosening structure 260 not only serves to prevent the iron core 220 from loosening from the push rod 210, but two or more anti-loosening structures 260 also serve to prevent the iron core 220 from rotating relative to the push rod 210. The two or more anti-loosening structures 260 may be arranged along the axial direction of the rod portion 211, although other arrangements may of course be adopted.

[0261] As shown in FIGS. 56 to 60, FIG. 56 is a schematic view of push rod mechanism 20 according to another embodiment of the present disclosure, viewed from one viewing angle. FIG. 57 is a schematic view of push rod mechanism 20 of FIG. 56, viewed from another viewing angle. FIG. 58 is a cross-sectional view taken along line PP in FIG. 56. FIG. 59 is a partial enlarged view of portion X4 in FIG. 58. FIG. 60 is a schematic view of push rod 210 in FIG. 56. While explanation of the fact that push rod mechanism 20 of this embodiment is similar to the push rod mechanism 20 shown in FIG. 52 will be omitted, the difference is that loosening prevention member 270 and rod portion 211 are integral with each other, and iron core 220 and push rod 210 are engaged and connected by loosening prevention member 270.

[0262] Specifically, the cover portion 272 is an engagement hook 272a, which is connected to the first through-hole 271, and the first through-hole 271 and the rod portion 211 of the push rod 210 have an integral structure. When the iron core 220 and the push rod 210 are attached, the loosening prevention member 270 is aligned with the first through-hole 221a of the iron core 220 so that the first through-hole 271 passes through the first through-hole 221a and the engagement hook 272a engages with and is connected to the side of the iron core 220 facing away from the rod portion 211.

[0263] It should be noted that the lid portion 272 is provided at one end of the first through portion 271, and since the lid portion 272 passes through the first through hole 221a of the iron core 220 and is positioned on the side opposite to the rod portion 211 of the iron core 220, it is necessary for the hole diameter dimension of the first through hole 221a to be larger than the outer diameter dimension of the first through portion 271; in other words, it is understood that there is a gap between the outer peripheral surface of the first through portion 271 and the inner wall surface of the first through hole 221a.

[0264] A limit structure 250 is provided between the iron core 220 and the push rod 210 to prevent relative movement between the iron core 220 and the push rod 210 along the axis of the rod portion 211. The limit structure 250 includes a limit protrusion 251 and a limit groove 252, where the limit protrusion 251 is provided on one of the iron core 220 and the rod portion 211 and the limit groove 252 is provided on the other of the iron core 220 and the rod portion 211. The limit protrusion 251 is used to be inserted into the limit groove 252 to achieve a position limiting effect.

[0265] In this embodiment, the limit protrusion 251 is provided on the surface of the rod portion 211 facing the iron core 220 , and the limit recessed groove 252 is provided on the side of the iron core 220 facing the rod portion 211 .

[0266] Of course, the limit protrusion 251 may be provided on the iron core 220, and the limit recessed groove 252 may be provided on the rod portion 211.

[0267] 59, a first inclined guide surface 225 is provided at the joint between the inner wall surface of first through-hole 221a and the surface of core 220 facing rod portion 211, and cover portion 272 has second inclined guide surface 2721 that is used to slidably abut against first inclined guide surface 225. When loosening prevention member 270 is inserted into first through-hole 221a of core 220, first inclined guide surface 225 slidably abuts against second inclined guide surface 2721, facilitating insertion of loosening prevention member 270 into first through-hole 221a.

[0268] As shown in Figures 61 and 62, Figure 61 shows a schematic diagram of push rod mechanism 20 according to another embodiment of the present disclosure. Figure 62 shows a cross-sectional view taken along line RR in Figure 61. Figure 63 shows a schematic diagram of iron core 220 in Figure 61. The push rod mechanism 20 according to this embodiment is similar to the push rod mechanism 20 according to the above-described embodiment, and a description thereof will be omitted. The difference is that iron core 220 and push rod 210 are integrally connected by injection molding.

[0269] Specifically, the loosening prevention structure 260 includes a first through hole 221a, a second through hole 222a, and a loosening prevention member 270, and the first through hole 221a and the second through hole 222a are both opened in the iron core 220, and the first through hole 221a and the second through hole 222a both penetrate the surface of the iron core 220 facing the rod portion 211 and the surface facing away from the iron core 220.

[0270] The loosening prevention member 270 includes a first through-hole 271, a second through-hole 273, and a lid portion 272. The first through-hole 271 is connected to the rod portion 211 and is provided in the first through-hole 221a, and the second through-hole 273 is connected to the rod portion 211 and is provided in the second through-hole 222a. The lid portion 272 is connected to the first through-hole 271 and the second through-hole 273.

[0271] In this embodiment, the lid portion 272 is bridge-connected to the first through portion 271 and the second through portion 273, and both ends of the lid portion 272 are connected to the first through portion 271 and the second through portion 273, respectively, so that the first through portion 271, the lid portion 272, and the second through portion 273 are considered to form an approximately U-shape.

[0272] 61 and 62, iron core 220 has second sink 224 on the side facing away from rod portion 211, first through hole 221a and second through hole 222a both communicate with second sink 224, and lid portion 272 is provided inside second sink 224. The surface of lid portion 272 on the side facing away from rod portion 211 is flush with the surface of iron core 220 on the side facing away from rod portion 211.

[0273] The lid portion 272 is provided in the second sink 224, and the surface of the lid portion 272 facing away from the rod portion 211 is flush with the surface of the iron core 220 facing away from the rod portion 211, so that the gap between the iron core 220 and the permanent magnet 340 can be reduced, and further, the magnetic resistance of the magnetic circuit is reduced.

[0274] It should be understood that the various examples / embodiments provided in the present disclosure can be combined with each other without causing any contradiction, and the description thereof will be omitted here.

[0275] In the embodiments of the present disclosure, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two unless otherwise clearly defined. Terms such as "attached," "contact," "connected," and "fixed" should be understood in a broad sense. For example, "connected" may mean a fixed connection, a detachable connection, or an integral connection, and "contacted" may mean a direct connection or an indirect connection via an intermediate medium. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure according to the specific circumstances.

[0276] In describing the embodiments of the present invention, the orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "front," and "rear" are orientations or positional relationships based on the drawings, and are intended merely to facilitate the description and simplification of the embodiments of the present invention, and do not suggest or imply that the referenced devices or units must have a particular direction or be configured and operated in a particular orientation, and therefore cannot be understood as limitations on the embodiments of the present invention.

[0277] In the description herein, the terms "one embodiment," "some embodiments," "particular embodiment," etc., mean that the particular feature, structure, material, or characteristic described in connection with this embodiment or example is included in at least one embodiment or example of the present invention. In this specification, general references to the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0278] The above are only preferred embodiments of the present invention, and are not used to limit the embodiments of the present invention. Those skilled in the art can make various modifications and changes to the embodiments of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the embodiments of the present invention shall fall within the protection scope of the embodiments of the present invention.

Claims

1. With a base, a contact assembly including a fixed contact and a movable contact that can be brought into contact or separated, the fixed contact being fixedly connected to the base; a push rod mechanism movable between a first position and a second position relative to the base along a contact separation direction of the contact assembly; an elastic member including a first elastic portion and a second elastic portion; The movable contact is provided to the push rod mechanism via the first elastic portion, the first elastic portion being used to apply contact pressure when the push rod mechanism is located at the first position, and the second elastic portion being used to apply an elastic force to the push rod mechanism to move it toward the first position when the push rod mechanism is located at the second position. A relay characterized by:

2. When the push rod mechanism is located at the second position, one end of the second elastic portion abuts against the movable contact, and the other end of the second elastic portion abuts against the base.

2. The relay according to claim 1.

3. When the push rod mechanism is in the first position, the second elastic portion does not apply an elastic force to the push rod mechanism.

2. The relay according to claim 1.

4. the relay further includes a permanent magnet; the push rod mechanism includes a push rod and an iron core connected to the push rod, The permanent magnet is provided on the side of the iron core facing away from the push rod.

2. The relay according to claim 1.

5. The base is The bottom wall and a side wall connected to the bottom wall; a stopper portion connected to an inner surface of the side wall and adapted to come into contact with the second elastic portion, When the push rod mechanism is in the first position, the second elastic portion does not contact the stopper portion.

5. The relay according to claim 1, wherein the first and second electrodes are electrically connected to each other.

6. the second elastic portion includes two elastic sheets provided on both sides of the first elastic portion along the width direction of the movable contact, Each of the elastic sheets has a second elastic arm at each end along the longitudinal direction of the movable contactor, the second elastic arm being pressed against the movable contactor and the base.

5. The relay according to claim 1, wherein the first and second electrodes are electrically connected to each other.

7. the second elastic arm includes a second bent portion and a lead; a protrusion of the second bent portion is used to abut against the movable contact, One end of the lead is connected to the second bent portion, and the other end is used to abut against the base.

7. The relay according to claim 6.

8. The elastic member is fixedly connected to the movable contact via the first elastic portion.

5. The relay according to claim 1, wherein the first and second electrodes are electrically connected to each other.

9. the first elastic portion includes a main spring piece and a first elastic arm, Both ends of the main spring piece along the longitudinal direction of the movable contactor have connecting portions, the connecting portions are fixedly connected to the movable contactor, and an opening is provided between the two connecting portions; One end of the first elastic arm is connected to the edge of the opening, and the other end is used to abut against the push rod mechanism.

9. The relay according to claim 8.

10. The other end of the elastic arm has a first bent portion, and a protrusion of the first bent portion is used to abut against the push rod mechanism.

10. The relay according to claim 9.

11. The connection portion has a connection hole, and movable contacts provided at both ends of the movable contactor are drilled into the connection hole.

10. The relay according to claim 9.

12. The plane on which the opening is located and the plane on which the connection portion is located are not located on the same plane.

10. The relay according to claim 9.

13. the push rod mechanism includes a push rod, the push rod including a rod portion and a bottom portion, the bottom portion being connected to one axial end of the rod portion, and the movable contactor being movable relative to the bottom portion along the axial direction of the rod portion between a third position and a fourth position, the first elastic portion being in contact with the bottom portion and the movable contactor and being used to apply an elastic force to the movable contactor to move it toward the third position, and the elastic member being provided between the bottom portion and the movable contactor; When the push rod mechanism is in the first position, the movable contact is in the fourth position, and when the push rod mechanism is in the second position, the movable contact is in the third position.

5. The relay according to claim 1, wherein the first and second electrodes are electrically connected to each other.

14. the push rod further includes a first side portion and a second side portion, the first side portion and the second side portion are both connected to the bottom portion and are provided opposite to each other along the longitudinal direction of the movable contactor; A first through hole is provided on the first side portion, a second through hole is provided on the second side portion, the movable contact and the elastic member are both drilled in the first through hole and the second through hole, and at the third position, the movable contact abuts against the hole wall of the first through hole and the hole wall of the second through hole, respectively.

14. The relay of claim 13.

15. The first elastic portion and the second elastic portion have an integral structure. The relay according to any one of claims 1 to 4.

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