Magnetic suspension driving mechanism

Abstract

The utility model relates to a magnetic suspension driving mechanism which is characterized in that a permanent magnet is connected with a swing mechanism and is arranged at an interval with an electromagnetic assembly, one end of an elastic piece is connected with the swing mechanism, and the other end of the elastic piece is fixedly connected with a base, so that the swing mechanism can horizontally move and can be hung in the base in an automatic reset mode when external force disappears; and when the current direction in the electromagnetic assembly is changed, the elastic force of the elastic piece can synchronously push the swing mechanism and the permanent magnet to do reverse linear motion, so that the swing mechanism and the permanent magnet form reciprocating swing in the base relative to the electromagnetic mechanism. The swing mechanism has the advantages that the swing mechanism is prevented from being directly mechanically connected with a power source, a magnetic suspension structure is formed, frictional resistance of mechanical connection is effectively reduced, and working noise and vibration sense caused by friction are reduced. And secondly, when the permanent magnet performs alternate reciprocating linear motion under the action of magnetic fields of different electromagnetic poles generated by the electromagnetic assembly, the utilization rate of output power of the driving mechanism is improved, and the energy efficiency ratio is improved.

Description

Technical Field

[0001] The utility model relates to a power device, more specifically to a magnetic suspension drive mechanism, which is mainly used in the field of personal care tools such as shavers, hair trimmers, and hair clippers. Background Art

[0002] Currently, when using a reciprocating razor, hair trimmer, or barber scissors, the blades that cut hair need to oscillate back and forth at a high frequency to achieve hair trimming. This oscillation is achieved by a motor and transmission structure installed within the body. The existing transmission mechanism is basically a transmission wheel with an eccentric shaft. The output shaft of the motor drives the transmission wheel to rotate at high speed. The eccentric shaft on the transmission wheel repeatedly strikes two opposing surfaces of the blade holder in a staggered manner, thereby driving the blade holder to oscillate horizontally, converting the motor's rotational motion into reciprocating motion.

[0003] Although this structure can achieve reciprocating swing, it requires the eccentric shaft on the transmission wheel to repeatedly strike entities on the blade holder in two opposite directions in sequence. When the eccentric shaft rotates to the other two directions, the eccentric shaft does not contact the blade holder. This is equivalent to the power output of the motor only driving the two opposite directions of the blade holder. When the eccentric shaft is in the other two directions, the motor does not work on the blade holder, resulting in less utilization of the motor's output power and relatively low energy efficiency. Secondly, because the minimum speed of the motor is above 3000 rpm, the working noise and vibration are relatively loud when the eccentric shaft drives the blade to swing back and forth, which correspondingly reduces the comfort of using the razor, shaver or hair clipper. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a magnetic levitation drive mechanism, which can not only improve the energy efficiency ratio, but also effectively reduce the working noise and vibration of the shaver, shaver or hair clipper, and improve the comfort of using the hair clipping tool.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is a magnetic levitation drive mechanism, including an electromagnetic component and at least one permanent magnet; the permanent magnet is connected to the swing mechanism and is spaced apart from the electromagnetic component, one end of the elastic member is connected to the swing mechanism, and the other end is connected and fixed to the base, so that the swing mechanism can be horizontally displaced and can automatically reset and be suspended in the base when the external force disappears; and when the direction of the current in the electromagnetic component changes, the elastic force of the elastic member can synchronously push the swing mechanism and the permanent magnet to move linearly in the opposite direction, so that the swing mechanism and the permanent magnet form a reciprocating swing relative to the electromagnetic mechanism in the base.

[0006] Preferably, the swing mechanism includes a main swing frame and an auxiliary swing frame, and the permanent magnet is provided with at least one connection and fixation on the bottom of the main swing frame and / or the auxiliary swing frame and is spaced apart from the electromagnetic component; the two ends of the main swing frame and the auxiliary swing frame are respectively connected to the elastic parts, so that the main swing frame and the auxiliary swing frame can be independently displaced horizontally and can be automatically reset and suspended in the base.

[0007] Preferably, the elastic member includes a first elastic piece fixed at both ends of the main swing frame so that the main swing frame can be horizontally displaced and automatically reset and suspended in the base; and a second elastic piece fixed at both ends of the auxiliary swing frame so that the auxiliary swing frame can be horizontally displaced and automatically reset and suspended in the base.

[0008] Preferably, one end of the first spring clip and the second spring clip connected to the main swing frame and the auxiliary swing frame are independent of each other, and the other end is connected as a whole and fixed to the base, so that the main swing frame and the auxiliary swing frame can be suspended horizontally in the base, and the main swing frame and the auxiliary swing frame are automatically reset under the elastic action of the first spring clip and the second spring clip; permanent magnets are respectively provided at the bottom of the main swing frame and the auxiliary swing frame and are spaced apart from the electromagnetic mechanism.

[0009] Preferably, a linkage part is provided between the main swing frame and the auxiliary swing frame, a hinge hole is provided at the center of the linkage part and the linkage part is connected to the base through a hinge shaft; linkage holes are provided at both ends of the hinge hole in the linkage part, a drive shaft is provided on the main swing frame, and a linkage shaft is provided on the auxiliary swing frame. The drive shaft and the linkage shaft are respectively inserted into the linkage holes to make the main swing frame and the auxiliary swing frame swing synchronously in opposite directions.

[0010] Preferably, the linkage hole is a long hole, the length of which is greater than the diameter of the drive shaft and the linkage shaft, and the width of which matches the diameter of the drive shaft and the linkage shaft, so that the auxiliary swing frame and the main swing frame swing in opposite directions.

[0011] Preferably, an elastic buffer is provided between the main swing frame and the auxiliary swing frame, and two ends of the elastic buffer are pressed against the main swing frame and the auxiliary swing frame respectively.

[0012] Preferably, the main swing frame includes a main base plate, and one end of the first elastic sheet is respectively fixed to the two ends of the main base plate; a swing column is provided at the center of the main base plate, which is perpendicular to the main base plate and is an integral structure with the main base plate, and the drive shaft is inserted into a socket provided in the swing column; the auxiliary swing frame includes an auxiliary base, and one end of the second elastic sheet is respectively fixed to the two ends of the auxiliary base plate; a column is provided at the center of the auxiliary base plate, which is perpendicular to the auxiliary base plate and is an integral structure with the auxiliary base plate, and baffles are respectively provided at the ends of the auxiliary base plates on both sides of the column, and side plates extending toward one side of the main swing frame are provided at the edge of each baffle, and buffer springs are respectively provided between the two side plates and the swing column, and the buffer springs constitute elastic buffer parts.

[0013] Preferably, the base includes a front wall and a rear wall that are arranged opposite to each other, the lower ends of the front wall and the rear wall are respectively fixed on both sides of the electromagnetic mechanism, and the other ends are respectively connected as a whole through the left connecting plate and the right connecting plate, the first spring clip and the second spring clip are respectively fixed on the left connecting plate and the right connecting plate so that the main swing frame and the auxiliary swing frame are suspended in the base and the permanent magnet installed under the main swing frame or the auxiliary swing frame is spaced apart from the electromagnetic mechanism; a cross connecting plate is provided between the left connecting plate and the right connecting plate, and a positioning hole and mounting holes are provided on the cross connecting plate on both sides of the positioning hole, the linkage is placed under the cross connecting plate and the hinge shaft is inserted into the positioning hole so that the linkage is hinged and fixed to the base.

[0014] Preferably, the electromagnetic assembly includes a magnetic yoke and a coil formed by stacking several silicon steel sheets; fixing holes are provided on both sides of the upper end of each silicon steel sheet so that the front wall and the rear wall of the base are detachably connected and fixed to the magnetic yoke; fastening holes are provided on both sides of the lower end of each silicon steel sheet.

[0015] The beneficial effects of the present invention are that, because the swing mechanism is connected to the permanent magnet, and the permanent magnet is spaced apart from the electromagnetic assembly, direct mechanical connection between the swing mechanism and the power source is avoided, forming a magnetic levitation structure. This effectively reduces the frictional resistance of the mechanical connection, reduces the operating noise and vibration caused by friction, and significantly improves the hand-held grip and user comfort of hair trimming tools such as razors, trimmers, or hair clippers. Secondly, when the permanent magnet undergoes alternating reciprocating linear motion under the influence of the magnetic field of the different electromagnetic poles generated by the electromagnetic assembly, the swing mechanism can synchronously follow the displacement of the permanent magnet to form a reciprocating swing, greatly improving the utilization rate of the output power of the drive mechanism and improving the energy efficiency ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural diagram of the magnetic levitation drive mechanism of the embodiment of the utility model

[0017] Figure 2 This is a planar structural diagram of the magnetic levitation drive mechanism of the utility model embodiment

[0018] Figure 3 for Figure 2 Cross-sectional structural diagram at AA in the middle

[0019] Figure 4 for Figure 2 Cross-sectional structural diagram at the middle BB

[0020] Figure 5 This is a three-dimensional structural diagram of the elastic member in the embodiment of the utility model

[0021] Figure 6 This is a three-dimensional assembly diagram of the swing mechanism in the embodiment of the utility model

[0022] Figure 7 This is a three-dimensional structural diagram of the main swing frame in the embodiment of the utility model

[0023] Figure 8 A three-dimensional structural diagram of the auxiliary swing frame in the embodiment of the utility model

[0024] Figure 9 A three-dimensional structural diagram of the base in the embodiment of the utility model

[0025] Figure 10 This is a partial three-dimensional cross-sectional view of the magnetic levitation drive mechanism of the embodiment of the utility model DETAILED DESCRIPTION

[0026] The following is combined with Figures 1 to 10 The following further describes the implementation of the present invention:

[0027] The present invention provides a magnetic levitation drive mechanism comprising an electromagnetic assembly 1 and at least one permanent magnet 2. During use, the electromagnetic assembly 1 continuously generates a magnetic field with different electromagnetic poles by inputting a continuously alternating positive and negative current. The magnetic poles of the permanent magnet 2 remain fixed. Utilizing the principle that like poles repel and opposite poles attract, the permanent magnet 2 continuously and alternately undergoes linear motion under the influence of the magnetic fields of different electromagnetic poles generated when the electromagnetic assembly 1 is energized. To achieve hair trimming, the permanent magnet 2 is connected to an oscillating mechanism 3 and spaced apart from the electromagnetic assembly 1. When the permanent magnet 2 undergoes linear motion, the oscillating mechanism 3 synchronously follows the displacement of the permanent magnet 2, forming a reciprocating swing. The oscillating mechanism 3 drives the movable blade of the hair trimming tool to oscillate back and forth along the stationary blade to cut hair. This technical solution does not involve improvements to the hair trimming tool, and the assembly diagram of the hair trimming tool is not shown in the figure. Because the swing mechanism 3 is connected to the permanent magnet 2, and the permanent magnet 2 is spaced apart from the electromagnetic assembly 1, the swing mechanism 3 avoids direct mechanical connection with the power source, forming a magnetic levitation structure. This effectively reduces the friction resistance of the mechanical connection, reduces the operating noise and vibration caused by friction, and can significantly improve the hand-held grip and user comfort of hair trimming tools such as razors, trimmers, or hair clippers. Secondly, when the permanent magnet 2 undergoes alternating reciprocating linear motion under the influence of the magnetic field of the different electromagnetic poles generated by the electromagnetic assembly 1, the swing mechanism 3 can synchronously follow the displacement of the permanent magnet 2 to form a reciprocating swing, greatly improving the utilization rate of the output power of the drive mechanism and improving the energy efficiency ratio.

[0028] In order to ensure the continuity and smoothness of the movement of the permanent magnet 2 when switching between different linear directions, the swing mechanism 3 needs to have the ability to automatically reset. For example, if the swing mechanism 3 does not have a reset force, after the electromagnetic component 1 is energized and the magnetic field generated drives the permanent magnet 2 to move linearly in one direction, the current of the electromagnetic component 1 is disconnected. At this time, there is no external magnetic field acting on the permanent magnet 2, and the permanent magnet 2 will stay at the end point of the linear motion and will not automatically reset to stay in the center. This means that when the electromagnetic component 1 inputs the opposite current and generates a magnetic field with opposite electromagnetic poles, it is facing the weaker magnetic position near the middle of the permanent magnet 2. The permanent magnet 2 cannot react immediately and move linearly in the opposite direction, resulting in discontinuity in the linear motion of the permanent magnet 2 and the swing mechanism 3, causing jamming. To this end, an elastic member 4 is also provided on the swing mechanism 3. One end of the elastic member 4 is connected to the swing mechanism 3, and the other end is fixedly connected to the base 5. This allows the swing mechanism 3 to move horizontally and automatically reset when the external force disappears, allowing it to be suspended within the base 5. Furthermore, when the current direction within the electromagnetic assembly 1 changes, the elastic force of the elastic member 4 can simultaneously propel the swing mechanism 3 and the permanent magnet 2 to reverse linear motion, causing the swing mechanism 3 and the permanent magnet 2 to swing back and forth relative to the electromagnetic assembly 1 within the base 5. By providing the elastic member 4, the swing mechanism 3 and the permanent magnet 2 can automatically reset when the external driving force is lost when the electromagnetic assembly 1 switches the current direction. This provides an external thrust or guiding force for the reverse linear motion of the swing mechanism 3 and the permanent magnet 2, thereby ensuring smoother and more continuous linear motion of the permanent magnet 2 when the electromagnetic assembly 1 switches the current direction, thereby ensuring the hair trimming performance of hair trimming tools such as shavers, trimmers, or hair clippers.

[0029] To reduce the vibration felt during use of the magnetic levitation drive mechanism, the swing mechanism 3 includes a main swing frame 31 and a sub-swing frame 32. At least one permanent magnet 2 is provided, connected and fixed to the bottom of the main swing frame 31 and / or the sub-swing frame 32, spaced apart from the electromagnetic assembly 1. The main swing frame 31 and the sub-swing frame 32 are each connected to an elastic member 4 at both ends, allowing the main swing frame 31 and the sub-swing frame 32 to be independently displaced horizontally and automatically reset while suspended within the base 5. By configuring the swing mechanism 3 as a separate main swing frame 31 and sub-swing frame 32, when there is only one permanent magnet 2, it is preferentially positioned at the bottom of the main swing frame 31; when there are two permanent magnets 2, they can be fixed to the bottoms of the main swing frame 31 and the sub-swing frame 32, respectively, with the magnetic poles of the two permanent magnets 2 at the same end being opposite. Regardless of whether one or two permanent magnets 2 are provided, the main swing frame 31 and the auxiliary swing frame 32 synchronously swing back and forth in opposite directions. By controlling the swing directions of the main swing frame 31 and the auxiliary swing frame 32, the impact force generated by the inertia of the main swing frame 31 and the auxiliary swing frame 32 is offset. This effectively reduces the vibration during use of the drive mechanism, improving the hand-held grip and user comfort of the hair trimming tool. Of course, if the swing mechanism 3 is configured as a separate main swing frame 31 and auxiliary swing frame 32, the main swing frame 31 and the auxiliary swing frame 32 can also be caused to swing back and forth synchronously in the same direction. This will only increase the vibration feeling but will not affect the hair trimming performance of the hair trimming tool. The specific configuration can be determined according to user or market demand.

[0030] Since the swing mechanism 3 is configured as a separate main swing frame 31 and auxiliary swing frame 32, and in order to ensure the inertia and stability of the main swing frame 31 and the auxiliary swing frame 32 to be able to automatically reset or swing back and forth independently after losing the electromagnetic driving force generated by the power supply of the electromagnetic component 1, the elastic member 4 includes a first elastic piece 41 fixed at both ends of the main swing frame 31 so that the main swing frame 31 can be horizontally displaced and automatically reset and suspended in the base 5; and a second elastic piece 42 fixed at both ends of the auxiliary swing frame 32 so that the auxiliary swing frame 32 can be horizontally displaced and automatically reset and suspended in the base 5. There are two groups of elastic members 4, and the main swing frame 31 and the auxiliary swing frame 32 are suspended in the base 5 by the first spring clip 41 and the second spring clip 42 respectively. When the electromagnetic component 1 is powered on or loses the electromagnetic force at the moment of switching the current, the main swing frame 31 and the auxiliary swing frame 32 can automatically reset under the elastic force of their respective first spring clips 41 and the second spring clips 42, thereby ensuring the inertia of the main swing frame 31 and the auxiliary swing frame 32 when switching the movement direction, preventing the main swing frame 31 and the auxiliary swing frame 32 from getting stuck, and improving the operation stability of the drive mechanism.

[0031] To facilitate the production, processing, and assembly of the elastic member 4, the first and second elastic members 41, 42 are connected to the main swing frame 31 and the auxiliary swing frame 32 at one end independently of each other, while the other ends are connected as one body and fixed to the base 5, allowing the main swing frame 31 and the auxiliary swing frame 32 to be suspended within the base 5 so as to be horizontally displaceable. Under the elastic action of the first and second elastic members 41, 42, the main swing frame 31 and the auxiliary swing frame 32 automatically reset. Permanent magnets 2 are provided at the bottoms of the main swing frame 31 and the auxiliary swing frame 32, respectively, and spaced apart from the electromagnetic assembly 1. By connecting one end of the first and second elastic members 41, 42 as one body and the other ends being independent of each other, during production, it is sufficient to punch out a separation groove 43 at the connection between the first and second elastic members 41, 42. This allows the first and second elastic members 41, 42 to be integrally formed, improving production efficiency while also facilitating assembly of the elastic member 4 and enhancing assembly efficiency.

[0032] In the above embodiment, it is defined that permanent magnets 2 are respectively provided at the bottom of the main swing frame 31 and the auxiliary swing frame 32, and have different magnetic poles at the same end. After alternating current is input into the electromagnetic component 1, the electromagnetic component 1 can generate magnetic fields with different magnetic poles, so that the main swing frame 31 and the auxiliary swing frame 32 can swing back and forth in opposite directions under the drive of the permanent magnet 2. In order to ensure the synchronization of the reciprocating swing of the main swing frame 31 and the auxiliary swing frame 32, a linkage member 6 is provided between the main swing frame 31 and the auxiliary swing frame 32, and a hinge hole 61 is provided at the center of the linkage member 6 and is connected to the base 5 through a hinge shaft 62; linkage holes 63 are respectively provided at both ends of the hinge hole 61 in the linkage member 6, a drive shaft 33 is provided on the main swing frame 31, and a linkage shaft 64 is provided on the auxiliary swing frame 32. The drive shaft 33 and the linkage shaft 64 are respectively inserted into the linkage hole 63 to make the main swing frame 31 and the auxiliary swing frame 32 swing synchronously in opposite directions. A linkage member 6 is provided between the main swing frame 31 and the auxiliary swing frame 32, and the drive shaft 33 and linkage shaft 64 installed on the main swing frame 31 and the auxiliary swing frame 32 are connected to the linkage member 6. This ensures that the reciprocating frequency of the main swing frame 31 and the auxiliary swing frame 32 remains consistent, and the impact forces during the reciprocating swing of the main swing frame 31 and the auxiliary swing frame 32 are offset to the greatest extent, effectively reducing the vibration and synchronization of the drive mechanism during use. Of course, the linkage shaft 64 installed in the auxiliary swing frame 32 can also be extended to allow a workpiece to be mounted on the end of the linkage shaft 64. In this way, the linkage shaft 64 and the end of the drive shaft 33 can be used to mount the workpieces respectively, allowing different workpieces to reciprocate in different directions.

[0033] Since the linkage member 6 is fixed to the base 5 by the hinge shaft 62 and the hinge hole 61, its relative position will not be displaced, and it can only be angularly deflected along the hinge shaft 62. When the driving shaft 33 in the main swing frame 31 and the linkage shaft 64 in the auxiliary swing frame 32 pass through the linkage hole 63 in the linkage member 6, in order to prevent the linkage member 6 from interfering with the reciprocating swing of the main swing frame 31 and the auxiliary swing frame 32, the linkage hole 63 is a long hole, the length of which is greater than the diameter of the driving shaft 33 and the linkage shaft 64, and the width of which matches the diameter of the driving shaft 33 and the linkage shaft 64, so that the auxiliary swing frame 32 and the main swing frame 31 swing in opposite directions. By controlling the shape of the linkage hole 63, when the main swing frame 31 and the auxiliary swing frame 32 synchronously follow the permanent magnet 2 to swing back and forth, the length of the linkage hole 63 is greater than the diameter of the drive shaft 33 and the linkage shaft 64, so that the drive shaft 33 and the linkage shaft 64 can be displaced along the linkage hole 63 to cause the linkage part 6 to deflect at an angle along the hinge shaft 62, forcing the reciprocating swing frequency of the main swing frame 31 and the auxiliary swing frame 32 to remain consistent and reciprocate in opposite directions, thereby avoiding the main swing frame 31 and the auxiliary swing frame 32 from twisting and causing jamming due to the linkage part 6.

[0034] At the moment the main and auxiliary swing frames 31, 32 switch swing directions following the linear motion of the permanent magnet 2, inertia causes a significant impact force on the main and auxiliary swing frames 31, 32. This can cause the swing mechanism 3 to vibrate strongly, and even cause the main and auxiliary swing frames 31, 32 to move up and down, affecting the trimming performance of the hair trimming tool. To address this, an elastic buffer 7 is provided between the main and auxiliary swing frames 31, 32, with its ends pressing against the main and auxiliary swing frames 31, 32, respectively. Because the main swing frame 31 and the auxiliary swing frame 32 swing back and forth synchronously in opposite directions under the constraints of the linkage 6, when the elastic buffer 7 is located between the main swing frame 31 and the auxiliary swing frame 32, the inertial impact force generated when the main swing frame 31 switches direction under the drive of the permanent magnet 2 can be directly absorbed by the elastic buffer 7, causing the elastic buffer 7 to generate a reaction force, thereby directly applying the reaction force to the main swing frame 31, improving the responsiveness and inertia of the main swing frame 31 and the permanent magnet 2 when switching swing directions, effectively preventing the main swing frame 31 from getting stuck when switching swing directions, and improving the smoothness of the reciprocating swing of the main swing frame 31. Secondly, under the action of the elastic buffer 7, the inertial impact force of the main swing frame 31 when switching swing directions will not directly impact the base 5, reducing the vibration and operating noise during the reciprocating swing of the main swing frame 31, and improving the hand-held grip and user comfort when using the hair trimming tool. Since the auxiliary swing frame 32 swings synchronously with the main swing frame 31 through the linkage member 6, the elastic buffer member 7 can also produce the same effect as the main swing frame 31 relative to the auxiliary swing frame 32 at the moment when the auxiliary swing frame 32 switches its swing direction.

[0035] In a specific embodiment, the main swing frame 31 includes a main base plate 311, one end of the first elastic piece 41 is fixed to the two ends of the main base plate 311, and the main swing frame 31 is suspended in the base 5; a swing column 312 is provided at the center of the main base plate 311, which is perpendicular to the main base plate 311 and is an integral structure with the main base plate 311. The drive shaft 33 is inserted into the socket 313 set in the swing column 312, and the other end is used to install a workpiece. The workpiece mainly refers to the movable knife in a hair trimming tool such as a razor, shaver or hair clipper. The drive shaft 33 is used to drive the movable knife to swing back and forth along the stationary knife to cut hair. The auxiliary pendulum frame 32 includes a auxiliary base 321, and one end of the second elastic piece 42 is fixed to the two ends of the auxiliary base 321, so that the auxiliary pendulum frame 32 is suspended in the base 5; a column 322 is provided at the center of the auxiliary base 321, which is perpendicular to the auxiliary base 321 and is an integral structure with the auxiliary base 321. One end of the linkage shaft 64 is inserted into the column 322, and the other end is inserted into the linkage hole 63 of the linkage member 6, so that the auxiliary pendulum frame 32 and the main pendulum frame 31 are linked under the restriction of the linkage member 6, so as to ensure the synchronization of the auxiliary pendulum frame 32 and the main pendulum frame 31 to offset the vibration generated by the main pendulum frame 31 and the auxiliary pendulum frame 32 during the reciprocating swing process.

[0036] To facilitate the elastic buffer 7 in absorbing the inertial impact force of the main and auxiliary swing frames 31, 32 when switching directions, and utilizing the reaction force generated by the inertial impact force to enhance the responsiveness of the main and auxiliary swing frames 31, 32 when switching directions, baffles 323 are provided at the ends of the auxiliary bases 321 on either side of the upright 322. Side plates 324 extending toward the main swing frame 31 are provided at the edges of each baffle 323. Buffer springs are provided between the side plates 324 and the swing column 312, forming the elastic buffer 7. By providing the side plates 324 extending toward the main base plate 311 at both ends of the auxiliary base 321, the ends of the buffer springs can directly press against the side plates 324 and the swing column 312 during assembly. This prevents radial and axial torsion or misalignment of the buffer springs during assembly or use, thereby maximizing the elastic force of the buffer springs. The use of side plates 324 and pendulum posts 312 to limit the buffer spring prevents the inertial impact force generated by the main pendulum frame 31 or auxiliary pendulum frame 32 when switching directions from being directly transmitted to the base 5, reducing the impact force on the base 5 and alleviating the vibration of the base 5. To reduce production costs during actual production and assembly, the main pendulum frame 31 and auxiliary pendulum frame 32 are integrally injection-molded from plastic. Because plastic is weaker than metal, to ensure the effectiveness of the elastic buffer 7, a seat hole 326 is provided in the side plates 324. A metal spring seat 325 is installed in the seat hole 326 to limit the buffer spring and ensure the stability of the elastic buffer 7. Secondly, the main pendulum frame 31 and auxiliary pendulum frame 32 are each integrally connected to the metal sheet 34 via bolts. The permanent magnet 2 is magnetically fixed to the metal sheet 34. This reduces the material cost of the main pendulum frame 31 and auxiliary pendulum frame 32. The first spring clip 41 and the second spring clip 42 are respectively connected to the ends of the metal sheet 34.

[0037] To facilitate the overall assembly of the magnetic levitation drive mechanism and improve assembly efficiency, the base 5 includes a front wall 51 and a rear wall 52 arranged opposite each other. The lower ends of the front wall 51 and rear wall 52 are respectively fixed to the sides of the electromagnetic assembly 1, and the other ends are connected to form a whole through a left connecting plate 53 and a right connecting plate 54. The left connecting plate 53 and the right connecting plate 54 connect the front wall 51 and the rear wall 52 together, giving the base 5 a monolithic frame structure. This allows the main and auxiliary swing frames 31 and 32, the elastic buffer 7, and the permanent magnets 2 mounted on the bottoms of the main and auxiliary swing frames 31 and 32 to be suspended as a whole within the base 5 above the electromagnetic assembly 1, using the first and second elastic clips 41 and 42 fixed to the left and right connecting plates 53 and 54, respectively. Each permanent magnet 2 is spaced apart from the electromagnetic assembly 1. This not only prevents direct contact between the swing mechanism 3 and the electromagnetic assembly 1, reducing frictional resistance and operating noise, but also greatly facilitates the assembly of the magnetic levitation drive mechanism and improves assembly efficiency.

[0038] To facilitate assembly of the linkage member 6 and ensure the synchronization of the reciprocating swing of the main swing frame 31 and the auxiliary swing frame 32, a cross-connecting plate 55 is provided between the left connecting plate 53 and the right connecting plate 54. The cross-connecting plate 55 is provided with a positioning hole 56 and mounting holes 57 on either side of the positioning hole 56. The linkage member 6 is placed below the cross-connecting plate 55, and the hinge shaft 62 is inserted into the positioning hole 56, thereby hingedly connecting the linkage member 6 to the base 5. The provision of the cross-connecting plate 55 not only strengthens the connection between the front wall 51 and the rear wall 52 but also serves as a mounting base for the linkage member 6, facilitating assembly and ensuring its secure installation. Furthermore, the mounting holes 57 in the cross-connecting plate 55 ensure the secure installation of the magnetic levitation drive mechanism when it is assembled within the body of the hair trimming tool (not shown).

[0039] In a specific embodiment, the electromagnetic assembly 1 includes a yoke 11 and a coil 12 formed from a plurality of stacked silicon steel sheets. Fixing holes are provided on either side of the upper end of each silicon steel sheet, allowing the front and rear walls 51, 52 of the base 5 to be removably connected to the yoke 11. Fastening holes 13 are provided on either side of the lower end of each silicon steel sheet. By providing fixing holes and fastening holes 13 directly at the upper and lower ends of the silicon steel sheets, bolts in the fixing holes can be used to directly connect the front and rear walls 51, 52 of the base 5 during assembly. This eliminates the need for a protective casing surrounding the yoke 11 and coil 12, improving assembly efficiency while also eliminating the need for the protective casing, reducing material costs. The fastening holes 13 ensure the overall firmness of the drive mechanism when it is installed as a whole in the hair trimming tool housing. That is, the upper end of the drive mechanism is connected to the hair trimming tool housing by screws inserted through the mounting holes 57 in the mounting plate of the base 5, and the lower end is fixedly connected to the hair trimming tool housing by screws inserted into the fastening holes 13, thereby ensuring that the magnetic suspension drive mechanism as a whole is firmly fixed in the hair trimming tool housing.

[0040] The above embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A magnetic levitation drive mechanism comprising an electromagnetic assembly (1) and at least one permanent magnet (2); characterized in that The permanent magnet (2) is connected to the swing mechanism (3) and is spaced apart from the electromagnetic assembly (1); one end of the elastic member (4) is connected to the swing mechanism (3) and the other end is fixedly connected to the base (5), so that the swing mechanism (3) can be horizontally displaced and automatically reset when the external force disappears, and is suspended in the base (5); and when the direction of the current in the electromagnetic assembly (1) changes, the elastic force of the elastic member (4) can synchronously push the swing mechanism (3) and the permanent magnet (2) to move linearly in opposite directions, so that the swing mechanism (3) and the permanent magnet (2) form a reciprocating swing relative to the electromagnetic assembly (1) in the base (5).

2. The magnetic levitation drive mechanism according to claim 1, characterized in that The swing mechanism (3) comprises a main swing frame (31) and an auxiliary swing frame (32); the permanent magnet (2) is provided with at least one connection fixed to the bottom of the main swing frame (31) and / or the auxiliary swing frame (32) and spaced apart from the electromagnetic component (1); both ends of the main swing frame (31) and the auxiliary swing frame (32) are respectively connected to the elastic member (4), so that the main swing frame (31) and the auxiliary swing frame (32) can be independently displaced horizontally and automatically reset to be suspended in the base (5).

3. The magnetic levitation drive mechanism according to claim 2, characterized in that The elastic member (4) comprises a first elastic piece (41) fixed at both ends of the main swing frame (31) so that the main swing frame (31) can be horizontally displaced and automatically reset and is suspended in the base (5); and a second elastic piece (42) fixed at both ends of the auxiliary swing frame (32) so that the auxiliary swing frame (32) can be horizontally displaced and automatically reset and is suspended in the base (5).

4. The magnetic levitation drive mechanism according to claim 3, characterized in that One end of the first spring piece (41) and the second spring piece (42) connected to the main swing frame (31) and the auxiliary swing frame (32) are independent of each other, and the other end is connected as a whole and fixed to the base (5), so that the main swing frame (31) and the auxiliary swing frame (32) can be suspended in the base (5) in a horizontally displaceable manner, and under the elastic action of the first spring piece (41) and the second spring piece (42), the main swing frame (31) and the auxiliary swing frame (32) can be automatically reset; permanent magnets (2) are respectively provided at the bottom of the main swing frame (31) and the auxiliary swing frame (32) and are spaced apart from the electromagnetic assembly (1).

5. The magnetic levitation drive mechanism according to claim 2, characterized in that A linkage member (6) is provided between the main swing frame (31) and the auxiliary swing frame (32). A hinge hole (61) is provided at the center of the linkage member (6) and the linkage member is connected to the base (5) through a hinge shaft (62). Linkage holes (63) are provided at both ends of the hinge hole (61) in the linkage member (6). A driving shaft (33) is provided on the main swing frame (31), and a linkage shaft (64) is provided on the auxiliary swing frame (32). The driving shaft (33) and the linkage shaft (64) are respectively inserted into the linkage holes (63) to make the main swing frame (31) and the auxiliary swing frame (32) swing back and forth synchronously in opposite directions.

6. The magnetic levitation drive mechanism according to claim 5, characterized in that The linkage hole (63) is a long hole, the length of which is greater than the diameter of the drive shaft (33) and the linkage shaft (64), and the width of which matches the diameter of the drive shaft (33) and the linkage shaft (64), so that the auxiliary swing frame (32) and the main swing frame (31) swing back and forth in opposite directions.

7. The magnetic levitation drive mechanism according to claim 2, characterized in that An elastic buffer (7) is provided between the main swing frame (31) and the auxiliary swing frame (32), and two ends of the elastic buffer (7) are pressed against the main swing frame (31) and the auxiliary swing frame (32) respectively.

8. The magnetic levitation drive mechanism according to claim 7, characterized in that The main swing frame (31) includes a main base plate (311), one end of a first elastic piece (41) is fixed to both ends of the main base plate (311); a swing column (312) is provided at the center of the main base plate (311) and is perpendicular to the main base plate (311) and is an integral structure with the main base plate (311); the drive shaft (33) is inserted into a socket (313) provided in the swing column (312); the auxiliary swing frame (32) includes an auxiliary base (321), one end of a second elastic piece (42) is fixed to the auxiliary base (321) At both ends of the auxiliary base (321); a column (322) perpendicular to the auxiliary base (321) and integrally formed with the auxiliary base (321) is provided at the center of the auxiliary base (321); baffles (323) are respectively provided at the ends of the auxiliary base (321) on both sides of the column (322); a side plate (324) extending toward one side of the main swing frame (31) is provided at the edge of each baffle (323); and a buffer spring is respectively provided between the two side plates (324) and the swing column (312), and the buffer spring constitutes an elastic buffer member (7).

9. The magnetic levitation drive mechanism according to claim 3, characterized in that The base (5) includes a front wall (51) and a rear wall (52) that are arranged opposite to each other. The lower ends of the front wall (51) and the rear wall (52) are respectively fixed to the two sides of the electromagnetic assembly (1), and the other ends are connected to form a whole through a left connecting plate (53) and a right connecting plate (54). The first elastic piece (41) and the second elastic piece (42) are respectively fixed to the left connecting plate (53) and the right connecting plate (54) so ​​that the main swing frame (31) and the auxiliary swing frame (32) are suspended in the base (5) and the main swing frame (31) and the auxiliary swing frame (32) are installed in the main swing frame (31). The permanent magnet (2) and the electromagnetic assembly (1) below the swing frame (31) or the auxiliary swing frame (32) are spaced apart. A transverse connecting plate (55) is provided between the left connecting plate (53) and the right connecting plate (54). The transverse connecting plate (55) is provided with a positioning hole (56) and mounting holes (57) arranged on both sides of the positioning hole (56). The linkage member (6) is placed below the transverse connecting plate (55) and the hinge shaft (62) is inserted into the positioning hole (56) so that the linkage member (6) is hingedly fixed to the base (5).

10. The magnetic levitation drive mechanism according to claim 1, characterized in that The electromagnetic assembly (1) comprises a yoke (11) and a coil (12) formed by stacking a plurality of silicon steel sheets; fixing holes are respectively provided on both sides of the upper end of each silicon steel sheet so that the front wall (51) and the rear wall (52) of the base (5) are detachably connected and fixed to the yoke (11); and fastening holes (13) are respectively provided on both sides of the lower end of each silicon steel sheet.

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