Single-core magnetic swing lifting mechanism

Abstract

The application discloses a single-core magnetic swing lifting mechanism and relates to the technical field of electromagnetic driving transmission mechanisms.The mechanism comprises a magnetic driving assembly, a transverse transmission assembly and a longitudinal lifting assembly; the magnetic driving assembly comprises a magnet and a power coil; the transverse transmission assembly comprises a horizontal push rod and a return spring; the magnet is fixed to the first end portion of the horizontal push rod, the power coil is sleeved on the outer circumferential side of the horizontal push rod, and the return spring applies an elastic pushing force to the horizontal push rod towards the first end portion; the longitudinal lifting assembly comprises a vertical longitudinal push rod one and a vertical longitudinal push rod two; the horizontal push rod is movably connected with the vertical longitudinal push rod one and the vertical longitudinal push rod two through inclined surface transmission structures, and horizontal reciprocating motion of the horizontal push rod is converted into alternating lifting motion of the vertical longitudinal push rod one and the vertical longitudinal push rod two.The single-core driving and translation type wedge transmission structure are adopted, so that the heat source is effectively reduced, the assembly difficulty is lowered, and the spatial layout is optimized.

Description

Technical Field

[0001] This application relates to the field of electromagnetic drive transmission mechanism technology, and in particular to a single-core magnetic pendulum lifting mechanism. Background Technology

[0002] In electromagnetically controlled electronic devices, the magnetic pendulum lifting mechanism is the core actuator for switching the contact spring on and off. It drives the spring to move up and down through an electromagnetic force-driven transmission structure, thereby completing the connection and disconnection of the circuit. The device's reliability, service life, size, power consumption, and manufacturing cost are all directly related to the structural design of the magnetic pendulum lifting mechanism.

[0003] Currently, conventional magnetic pendulum lifting mechanisms in the industry generally adopt a drive structure with a double coil iron core and a seesaw-type armature: the two independent coil iron cores generate electromagnetic attraction, which drives the armature to swing back and forth around the central fulcrum, and then the armature drives the top rod and the contact spring to complete the lifting action.

[0004] However, the aforementioned existing technical solutions have the following shortcomings in practical applications: First, the mechanism generates a large amount of heat, and its operational stability is significantly affected by temperature. The dual-coil structure requires two sets of coils and iron cores. During operation, the coils consume a lot of power, generating multiple heat sources with concentrated heat, resulting in rapid temperature rise and severe heat accumulation inside the device. Sustained high temperatures not only accelerate the aging of the coil insulation layer and increase the risk of demagnetization of the permanent magnet, but also cause dimensional deformation and reduced lubrication performance of moving parts, directly affecting the mechanism's motion accuracy and contact reliability, and limiting the device's continuous operating time and adaptability to high-temperature environments.

[0005] Secondly, the seesaw-type oscillating structure is difficult to assemble, limiting production efficiency. The seesaw-type armature structure relies on a central oscillating fulcrum for oscillation transmission, requiring extremely high tolerances for the fulcrum's installation position accuracy, and the relative coaxiality and perpendicularity of the armature and the two sets of coil cores. Actual production assembly requires multiple adjustments and calibrations, resulting in complex processes, long assembly cycles, and a high defect rate. This makes it difficult to adapt to the demands of large-scale, high-efficiency production, indirectly increasing manufacturing costs.

[0006] Third, the overall structure occupies a large space, which is not conducive to the miniaturization design of devices. The structure of the double coil iron core symmetrically arranged in the longitudinal direction makes the overall longitudinal dimension of the mechanism relatively large, and the installation space occupied is large, which makes it difficult to meet the current design trend of electronic devices towards miniaturization and compactness.

[0007] In summary, the existing double-coil seesaw-type magnetic pendulum lifting mechanism has technical problems such as severe heat generation, high assembly difficulty, low production efficiency, and large structural volume. There is an urgent need for a new type of magnetic pendulum lifting mechanism to improve the above defects. Summary of the Invention

[0008] The technical problem to be solved by this invention is to provide a single-core magnetic pendulum lifting mechanism, which addresses the shortcomings of existing double-coil seesaw-type magnetic pendulum lifting mechanisms, such as severe heat generation, high assembly difficulty, low production efficiency, and large structural volume. The aim is to reduce power consumption and temperature rise, simplify assembly process, and optimize spatial layout by combining single magnetic drive with translational wedge transmission structure.

[0009] The technical solution adopted in this invention is a single-core magnetic pendulum lifting mechanism, comprising an upper support plate and a lower support plate, wherein a magnetic drive assembly, a transverse transmission assembly, and a longitudinal lifting assembly are disposed on the upper and lower support plates; the magnetic drive assembly includes a magnet and an energized coil; the transverse transmission assembly includes a transverse push rod and a return spring; the magnet is fixed to a first end of the transverse push rod in the axial direction; the axis of the energized coil coincides with the movement axis of the transverse push rod, and the energized coil is fitted onto the outer periphery of the transverse push rod through a through hole in its middle; the return spring is fitted onto a second end of the transverse push rod. On the rod segment, one end is axially limited relative to the body of the lateral push rod, and the other end abuts against the stepped end face of the lateral push rod body to apply an elastic thrust toward its first end; the longitudinal lifting assembly includes a longitudinal push rod one and a longitudinal push rod two, both of which are arranged vertically, with their axes perpendicular to the axis of the lateral push rod; the lateral push rod and the longitudinal push rod one, and the lateral push rod and the longitudinal push rod two, are movably coupled through an inclined plane transmission structure to convert the horizontal reciprocating motion of the lateral push rod into the alternating lifting motion of the longitudinal push rod one and the longitudinal push rod two.

[0010] The aforementioned single-core magnetic pendulum lifting mechanism includes an inclined plane transmission structure comprising: a first wedge-shaped protrusion and a second wedge-shaped protrusion disposed on the horizontal push rod, and a first wedge-shaped slope groove disposed on the first longitudinal push rod and a second wedge-shaped slope groove disposed on the second longitudinal push rod; the first wedge-shaped protrusion is movably inserted into the first wedge-shaped slope groove, and the second wedge-shaped protrusion is movably inserted into the second wedge-shaped slope groove.

[0011] In the aforementioned single-core magnetic pendulum lifting mechanism, the height of the first wedge-shaped slope groove gradually decreases from the first end to the second end along the axial direction of the horizontal push rod, while the height of the second wedge-shaped slope groove gradually increases from the first end to the second end along the axial direction of the horizontal push rod.

[0012] In the aforementioned single-core magnetic pendulum lifting mechanism, the energized coils are arranged horizontally, and the axes of the energized coils coincide with the movement axis of the horizontal push rod.

[0013] The aforementioned single-core magnetic pendulum lifting mechanism further includes a spring fixing seat with a spring hole. The second end of the horizontal push rod is movably inserted into the spring hole. The return spring is sleeved on the rod segment of the second end of the horizontal push rod, with one end abutting against the limiting surface of the inner wall of the spring hole and the other end abutting against the stepped end face of the horizontal push rod body.

[0014] The aforementioned single-core magnetic pendulum lifting mechanism further includes a magnet support base with a receiving groove. The magnet, fixed to the first end of the horizontal push rod, is movably inserted into the receiving groove, and the radial surface of the magnet does not contact the inner wall of the receiving groove.

[0015] The aforementioned single-core magnetic pendulum lifting mechanism further includes a reed actuator limiting assembly, which comprises a first metal top column, a second metal top column, a first reed rod, a second reed rod, and a reed fixing plate. The first metal top column is fixedly disposed vertically below the bottom end of the first longitudinal push rod, and the second metal top column is fixedly disposed vertically below the bottom end of the second longitudinal push rod. Guide holes are provided on the reed fixing plate and the lower support plate, and the first and second reed rods are slidably inserted vertically into the corresponding guide holes. The top end of the first reed rod faces the bottom end of the first metal top column, and the top end of the second reed rod faces the bottom end of the second metal top column. A contact reed is fixedly connected to the bottom end of both the first and second reed rods.

[0016] In the aforementioned single-core magnetic pendulum lifting mechanism, both the first and second spring top rods are provided with axially extending anti-rotation bosses on their outer periphery; the inner wall of the corresponding guide hole of the lower support plate or spring fixing plate is provided with a limiting groove adapted to the anti-rotation boss, and the anti-rotation boss is embedded in the limiting groove, forming a circumferential limiting structure that restricts the circumferential deflection of the first and second spring top rods.

[0017] In the aforementioned single-core magnetic pendulum lifting mechanism, a fixing plate is fixedly installed on the opposite side surface of the upper support plate and the lower support plate. The energized coil is fixedly installed between the upper support plate and the lower support plate through the fixing plate. The first longitudinal push rod and the second longitudinal push rod are slidably inserted into the guide hole opened on the lower support plate in the vertical direction.

[0018] In the aforementioned single-core magnetic pendulum lifting mechanism, the spring fixing seat is fixedly installed on the lower support plate and located between the upper support plate and the lower support plate; the magnet support seat is fixedly installed on the lower support plate and located on the first end side of the horizontal push rod.

[0019] The beneficial effects of this invention are:

[0020] 1. The single-core drive structure, consisting of an energized coil and a permanent magnet, effectively reduces the heat source of the coil compared to the traditional dual-coil independent core solution, lowers the internal temperature rise of the mechanism, and significantly mitigates the adverse effects of high temperature on motion accuracy and component lifespan.

[0021] 2. The translational transmission method, which uses the wedge-shaped protrusion of the horizontal push rod and the wedge-shaped slope groove of the vertical push rod, replaces the traditional seesaw-type swing structure. It eliminates the need to set a swing fulcrum, greatly reduces the stringent requirements for the coaxiality and perpendicularity of parts assembly, simplifies the installation process, and improves production assembly efficiency.

[0022] 3. The energized coil adopts a horizontal layout, which makes full use of the horizontal space, significantly compresses the longitudinal dimension of the mechanism, reduces the overall installation space occupied, and is more conducive to the miniaturization design of the device.

[0023] 4. A boss-groove type circumferential limiting structure is set between the spring top rod and the support plate or fixed plate, which can effectively prevent the spring top rod and the contact spring from circumferentially deflecting, ensuring the consistency of the contact position and improving the stability and contact reliability of the product operation. Attached Figure Description

[0024] Figure 1 It is a three-dimensional view of the structure.

[0025] Figure 2 This is the main view of the organization.

[0026] Figure 3 This is a three-dimensional view of the mechanism with the support plate hidden.

[0027] Figure 4 It is a three-dimensional view of the magnetic drive assembly, the lateral transmission assembly, and the longitudinal lifting assembly.

[0028] Figure 5 This is a 3D view with the horizontal push rod and upper support plate hidden.

[0029] Figure 6 It is a three-dimensional view of the push rod and the energized coil.

[0030] Figure 7 This is a three-dimensional view of the lower support plate.

[0031] Figure 8 This is a partial view of the organization.

[0032] Explanation of reference numerals in the attached drawings: 11. Magnet; 12. Magnet support base; 1221. Receiving groove; 13. Energized coil; 131. Through hole; 21. Horizontal push rod; 211. Step end face; 212. First wedge-shaped protrusion; 213. Second wedge-shaped protrusion; 22. Return spring; 31. Longitudinal push rod one; 311. First wedge-shaped slope groove; 32. Longitudinal push rod two; 321. Second wedge-shaped slope groove; 33. Metal top post one; 34. Metal top post two; 41. Spring top rod one; 411. Anti-rotation boss; 42. Spring top rod two; 43. Contact spring; 5. Upper support plate; 51. Fixing plate; 52. Spring fixing base; 53. Spring hole; 6. Spring fixing plate; 61. Limiting groove; 62. Guide hole; 7. Lower support plate. Detailed Implementation

[0033] In the description of this invention, it should be understood that the terms center, longitudinal, transverse, length, width, thickness, front, back, left, right, upper, lower, axial, radial, vertical, horizontal, inner, and outer, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Furthermore, the terms first and second are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as first or second may explicitly or implicitly include one or more of that feature. In the description of this invention, "multiple" means two or more, unless otherwise explicitly specified.

[0034] A single-core magnetic pendulum lifting mechanism, referring to Figure 1-3 It includes a magnetic drive assembly, a lateral transmission assembly, a longitudinal lifting assembly, a reed actuator limit assembly, an upper support plate 5, a lower support plate 7, and a reed fixing plate 6.

[0035] Reference Figure 3 and Figure 4 The magnetic drive assembly includes a magnet 11, a magnet support 12, and an energized coil 13.

[0036] The magnet support 12 is fixedly installed on the lower support plate 7, and a receiving groove 1221 is provided on the magnet support 12.

[0037] The energized coil 13 adopts a horizontal layout. The same number of fixing plates 51 are fixedly installed on the opposite side surfaces of the upper support plate 5 and the lower support plate 7. The switching coils are fixedly installed on the upper support plate 5 and the lower support plate 7 through the fixing plates 51 and are arranged horizontally along the surface of the upper support plate 5 or the lower support plate 7.

[0038] A through hole 131 is provided in the middle of the energized coil 13.

[0039] The transverse transmission assembly includes a transverse push rod 21 and a return spring 22. A magnet 11 is fixed to the first end of the transverse push rod 21 in the axial direction, and the return spring 22 is disposed at the second end of the transverse push rod 21 in the axial direction.

[0040] The axis of the energized coil 13 coincides with the axis of motion of the horizontal push rod 21, and the energized coil 13 is fitted onto the outer periphery of the horizontal push rod 21 through the through hole 131.

[0041] The energized coil 13 is connected to an external control circuit. When energized, it can generate an axial magnetic field, and the direction of the magnetic field is set to be the same as the polarity of the magnetic poles opposite to the magnet 11, forming a magnetic force of like poles repelling each other.

[0042] A spring fixing seat 52 is fixedly installed on the lower support plate 7. A spring hole 53 is opened on the spring fixing seat 52. The return spring 22 is sleeved on the rod segment of the horizontal push rod 21 away from the magnet 11 (i.e., the rod segment at the second end of the horizontal push rod 21). One end of the return spring 22 abuts against the limiting surface of the inner wall of the spring hole 53, and the other end abuts against the stepped end face 211 of the rod body of the horizontal push rod 21. The return spring 22 always applies an elastic thrust toward the magnet 11 to the horizontal push rod 21.

[0043] Therefore, the horizontal push rod 21 is slidably mounted horizontally between the upper support plate 5 and the lower support plate 7 by the energized coil 13 and the spring fixing seat 52. One end of the horizontal push rod 21 faces the magnet support seat 12 (i.e., the first end), and the other end faces the spring fixing seat 52 (i.e., the second end). The rod body of the horizontal push rod 21 passes through the energized coil 13. The magnet 11 is movably inserted into the receiving groove 1221, and the radial surface of the magnet 11 does not contact the inner wall of the receiving groove 1221.

[0044] The horizontal push rod 21 has a first wedge-shaped protrusion 212 and a second wedge-shaped protrusion 213 for cooperating with the longitudinal lifting assembly.

[0045] Reference Figure 5 and Figure 6 The longitudinal lifting assembly includes longitudinal push rod 1 31, longitudinal push rod 2 32, and two sets of metal top columns, namely metal top column 1 33 and metal top column 2 34.

[0046] Two guide holes 62 are provided on the lower support plate 7 at the positions corresponding to the longitudinal push rod 31 and the longitudinal push rod 32. Both the longitudinal push rod 31 and the longitudinal push rod 32 can be slidably inserted into the guide holes 62 of the lower support plate 7. The guide holes 62 are used to limit the radial displacement of the longitudinal push rod 31 and the longitudinal push rod 32, ensuring that they can only make linear up-and-down movements in the vertical direction (i.e., the direction of their own axis).

[0047] The first wedge-shaped slope groove 311 and the second wedge-shaped slope groove 321 are respectively provided on the first longitudinal push rod 31 and the second longitudinal push rod 32.

[0048] The first wedge-shaped groove 311 gradually decreases in height along the axial direction of the push rod 21, while the second wedge-shaped groove 321 gradually increases in height along the axial direction of the push rod 21. The inclination angles of the two grooves are consistent, forming a reverse-symmetrical wedge-shaped transmission structure. Here, the axial direction of the push rod 21 refers to the direction from the side of the push rod 21 near the spring fixing seat 52 towards the magnet support seat 12.

[0049] In terms of assembly, the first wedge-shaped groove 311 of the longitudinal push rod 31 is movably engaged with the first wedge-shaped protrusion 212 on the transverse push rod 21, and the second wedge-shaped groove 321 of the longitudinal push rod 32 is movably engaged with the second wedge-shaped protrusion 213 on the transverse push rod 21.

[0050] Reference Figure 4 , Figure 7 and Figure 8 Metal top column 1 33 and metal top column 2 34 are respectively located directly below longitudinal push rod 1 31 and longitudinal push rod 2 32, that is, near one end of the lower support plate 7. Taking one set as an example: the metal top column is limited along the vertical direction, one end of which is opposite to the bottom end of one of the longitudinal push rods, and the other end is opposite to the top end of the spring top rod below, which is used to transmit the vertical thrust.

[0051] The reed actuation and limiting assembly includes two sets of reed push rods, namely reed push rod one 41 and reed push rod two 42, a reed fixing plate 6, and a corresponding contact reed 43.

[0052] The spring fixing plate 6 is located below the lower support plate 7 and its position is fixed.

[0053] Both spring-loaded rod 41 and spring-loaded rod 42 are slidably inserted vertically into the guide holes 62 on the spring fixing plate 6. Each set of spring-loaded rods has a contact spring 43 fixedly connected to its bottom end, with its top end facing the corresponding metal post. Spring-loaded rod 41 corresponds to the contact end of the connector, and spring-loaded rod 42 corresponds to the reset side of the connector.

[0054] The outer circumference of the spring top rod is provided with an axially extending anti-rotation boss 411, and the inner wall of the corresponding guide hole 62 of the lower support plate 7 or the spring fixing plate 6 is provided with a limiting groove 61 that matches the anti-rotation boss 411. The anti-rotation boss 411 is embedded in the limiting groove 61 to form a circumferential limiting structure, which is used to limit the rotation of the spring top rod itself and its circumferential deflection relative to the spring fixing plate 6.

[0055] The implementation process of this application is as follows: I. Default state during power failure When no current flows through the energized coil 13, it does not generate an additional magnetic field. The horizontal push rod 21 is only subjected to the combined action of the elastic thrust of the return spring 22 and the magnetic attraction between the magnet 11 and the magnet support 12. The return spring 22 pushes the horizontal push rod 21 toward the magnet support 12. When the magnet 11 enters the magnetic attraction range of the magnet support 12, the magnetic attraction and the spring thrust together drive the horizontal push rod 21 to continue moving until the first end of the horizontal push rod 21 abuts against the limiting surface of the magnet support 12, at which point the movement stops and remains stable.

[0056] During the translation of the horizontal push rod 21 toward the magnet support seat 12, the first wedge-shaped protrusion 212 on it slides along the first wedge-shaped slope groove 311 of the longitudinal push rod 31. As the height of the slope groove gradually increases along the direction of movement, it pushes the longitudinal push rod 31 upward. At the same time, the second wedge-shaped protrusion 213 slides along the second wedge-shaped slope groove 321 of the longitudinal push rod 32. The height of the slope groove gradually decreases along the direction of movement. The longitudinal push rod 32 moves downward along the guide hole 62 under its own weight or auxiliary reset force.

[0057] After the longitudinal push rod 32 moves down to the set stroke, it presses down on the reset side spring push rod 42 via the metal top post 34 below it, causing the corresponding contact spring 43 to move and complete the reset side operation. At this time, the longitudinal push rod 31 corresponding to the contact end is lifted, the spring push rod 41 below it is not pressed, and the connected contact spring 43 remains in the disconnected state.

[0058] II. Power-on operating status When a current in a predetermined direction is applied to the energized coil 13, the coil 13 generates an axial magnetic field, and the magnetic poles at the end facing the magnet 11 have the same polarity as the magnetic poles at the opposite end of the magnet 11. Based on the principle of like poles repelling each other, an axial repulsive force is generated between the coil and the magnet 11. This magnetic repulsive force is greater than the sum of the elastic force of the return spring 22 and the attractive force of the magnet 11, thereby pushing the horizontal push rod 21 to translate away from the magnet support 12 (i.e., towards the second end of the horizontal push rod 21) and compressing the return spring 22.

[0059] As the transverse push rod 21 moves in that direction, its first wedge-shaped protrusion 212 slides along the first wedge-shaped slope groove 311 of the longitudinal push rod 31, and the slope height gradually decreases, causing the longitudinal push rod 31 to move downward along the guide hole 62; at the same time, the second wedge-shaped protrusion 213 slides along the second wedge-shaped slope groove 321 of the longitudinal push rod 32, and the slope height gradually increases, pushing the longitudinal push rod 32 upward.

[0060] After the longitudinal push rod 31 moves down to the set stroke, the metal top post 33 below it presses down on the contact spring top rod 41 at the contact end, causing the contact spring 43 to move downward until it reliably engages with the connector, thus connecting the circuit. At this time, the reset spring top rod 42 on the reset side returns to its original position as the longitudinal push rod 32 rises.

[0061] III. Reciprocating Cycle Process By controlling the energized coil 13 alternately by external control circuit, the horizontal push rod 21 can be driven to move back and forth along the axial direction, thereby driving the vertical push rod 31 and the vertical push rod 32 to rise and fall alternately, so that the contact end and the contact spring 43 on the reset side can perform the switching on and off action in a cycle, thus completing the continuous magnetic pendulum lifting function.

[0062] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A single-core magnetic pendulum lifting mechanism, comprising an upper support plate (5) and a lower support plate (7), characterized in that, The upper support plate (5) and the lower support plate (7) are provided with a magnetic drive assembly, a transverse transmission assembly and a longitudinal lifting assembly; The magnetic drive assembly includes a magnet (11) and an energized coil (13); The transverse transmission assembly includes a transverse push rod (21) and a return spring (22); The magnet (11) is fixed to the first end of the horizontal push rod (21) in the axial direction; The axis of the energized coil (13) coincides with the axis of motion of the horizontal push rod (21), and the energized coil (13) is fitted onto the outer periphery of the horizontal push rod (21) through a through hole (131) in its middle. The return spring (22) is sleeved on the second end of the push rod (21), with one end axially limited relative to the body of the push rod (21) and the other end abutting against the stepped end face (211) of the body of the push rod (21) to apply an elastic thrust toward the first end of the push rod (21). The longitudinal lifting assembly includes a first longitudinal push rod (31) and a second longitudinal push rod (32). Both the first longitudinal push rod (31) and the second longitudinal push rod (32) are arranged in the vertical direction, and their axes are perpendicular to the axis of the horizontal push rod (21). The horizontal push rod (21) and the first vertical push rod (31), as well as the horizontal push rod (21) and the second vertical push rod (32), are connected by a ramp transmission structure so that the horizontal reciprocating motion of the horizontal push rod (21) is converted into the alternating lifting motion of the first vertical push rod (31) and the second vertical push rod (32).

2. The single-core magnetic pendulum lifting mechanism according to claim 1, characterized in that, The inclined plane transmission structure includes: a first wedge-shaped protrusion (212) and a second wedge-shaped protrusion (213) disposed on the horizontal push rod (21), and a first wedge-shaped slope groove (311) and a second wedge-shaped slope groove (321) correspondingly opened on the first longitudinal push rod (31) and the second longitudinal push rod (32); the first wedge-shaped protrusion (212) is movably inserted into the first wedge-shaped slope groove (311), and the second wedge-shaped protrusion (213) is movably inserted into the second wedge-shaped slope groove (321).

3. The single-core magnetic pendulum lifting mechanism according to claim 2, characterized in that, The height of the first wedge-shaped slope groove (311) gradually decreases from the first end to the second end along the axial direction of the horizontal push rod (21), and the height of the second wedge-shaped slope groove (321) gradually increases from the first end to the second end along the axial direction of the horizontal push rod (21).

4. The single-core magnetic pendulum lifting mechanism according to claim 1, characterized in that, The energized coil (13) adopts a horizontal layout, and the axis of the energized coil (13) coincides with the motion axis of the horizontal push rod (21).

5. The single-core magnetic pendulum lifting mechanism according to claim 1, characterized in that, It also includes a spring fixing seat (52), on which a spring hole (53) is provided, and the second end of the horizontal push rod (21) is movably inserted into the spring hole (53); the return spring (22) is sleeved on the rod segment of the second end of the horizontal push rod (21), one end of which abuts against the limiting surface of the inner wall of the spring hole (53), and the other end abuts against the stepped end face (211) of the rod body of the horizontal push rod (21).

6. The single-core magnetic pendulum lifting mechanism according to claim 1, characterized in that, It also includes a magnet support base (12), on which a receiving groove (1221) is provided; the magnet (11) fixed to the first end of the horizontal push rod (21) is movably inserted into the receiving groove (1221), and the radial surface of the magnet (11) does not contact the inner wall of the receiving groove (1221).

7. The single-core magnetic pendulum lifting mechanism according to claim 1, characterized in that, It also includes a reed actuator limiting assembly, which includes a metal top post one (33), a metal top post two (34), a reed top rod one (41), a reed top rod two (42), and a reed fixing plate (6); the metal top post one (33) is fixedly disposed vertically below the bottom end of the longitudinal push rod one (31), and the metal top post two (34) is fixedly disposed vertically below the bottom end of the longitudinal push rod two (32); the reed fixing plate (6) and the lower support plate (7) are also included. A guide hole (62) is provided on the top, and the first spring top rod (41) and the second spring top rod (42) are slidably inserted into the corresponding guide hole (62) in the vertical direction; the top end of the first spring top rod (41) faces the bottom end of the first metal top post (33), and the top end of the second spring top rod (42) faces the bottom end of the second metal top post (34); a contact spring (43) is fixedly connected to the bottom end of the first spring top rod (41) and the second spring top rod (42).

8. The single-core magnetic pendulum lifting mechanism according to claim 7, characterized in that, Both the first spring top rod (41) and the second spring top rod (42) are provided with an anti-rotation boss (411) extending axially on the outer periphery of their rod bodies; the inner wall of the corresponding guide hole (62) of the lower support plate (7) or the spring fixing plate (6) is provided with a limiting groove (61) adapted to the anti-rotation boss (411), and the anti-rotation boss (411) is embedded in the limiting groove (61) to form a circumferential limiting structure that restricts the circumferential deflection of the first spring top rod (41) and the second spring top rod (42).

9. The single-core magnetic pendulum lifting mechanism according to claim 1, characterized in that, A fixing plate (51) is fixedly provided on one side surface of the upper support plate (5) and the lower support plate (7). The energized coil (13) is fixedly installed between the upper support plate (5) and the lower support plate (7) through the fixing plate (51). The first longitudinal push rod (31) and the second longitudinal push rod (32) are slidably inserted into the guide hole (62) opened on the lower support plate (7) in the vertical direction.

10. The single-core magnetic pendulum lifting mechanism according to claim 9, characterized in that, The spring fixing seat (52) is fixedly installed on the lower support plate (7) and located between the upper support plate (5) and the lower support plate (7); the magnet support seat (12) is fixedly installed on the lower support plate (7) and located on the first end side of the horizontal push rod (21).

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