Magnetic suspension driving mechanism

Abstract

The invention relates to a magnetic suspension driving mechanism which is characterized in that a permanent magnet is connected with a swing mechanism and 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 move horizontally 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 beneficial effects that the swing mechanism is prevented from being directly mechanically connected with a power source, a magnetic suspension structure is formed, the frictional resistance of mechanical connection is effectively reduced, and the working noise and the 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 invention relates to a power device, and 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] At present, when using a reciprocating shaver, shaver or hair clipper, the blade for cutting hair needs to reciprocate at a high frequency to trim the hair. The reciprocating swing needs to be achieved with the help of a motor and a transmission structure installed in 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 a high speed, and the eccentric shaft on the transmission wheel repeatedly hits the two opposite surfaces of the blade holder in turn, thereby driving the blade holder to reciprocate horizontally, thereby changing the rotational motion of the motor into reciprocating motion.

[0003] Although this structure can achieve reciprocating swing, it requires the eccentric shaft on the transmission wheel to repeatedly hit the entities on the knife seat in two opposite directions in sequence. When the eccentric shaft rotates to the other two directions, the eccentric shaft will not contact the knife seat. This is equivalent to the power output by the motor can only drive the two opposite directions of the knife seat. When the eccentric shaft is in the other two directions, the motor will not work on the knife seat, resulting in less utilization of the motor's output power and low energy efficiency. Secondly, because the minimum speed of the motor is above 3000 rpm, the working noise is relatively large and the vibration is also strong 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. Summary of the invention

[0004] In order to solve the above technical problems, the present invention 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 clipper.

[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 be automatically reset and 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 at least one permanent magnet is connected and fixed to 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 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 sheet and the second spring sheet 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 to suspend the main swing frame and the auxiliary swing frame horizontally displaceably in the base, and the main swing frame and the auxiliary swing frame automatically reset under the elastic action of the first spring sheet and the second spring sheet; 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 respectively provided at both ends of the hinge hole in the linkage part, a driving shaft is provided on the main swing frame, and a linkage shaft is provided on the auxiliary swing frame, and the driving shaft and the linkage shaft are respectively inserted into the linkage holes so that 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 bottom plate, and one end of the first elastic sheet is respectively fixed at the two ends of the main bottom plate; a swing column perpendicular to the main bottom plate and integrated with the main bottom plate is provided at the center of the main bottom plate, and the drive shaft is inserted into a socket set in the swing column; the auxiliary swing frame includes an auxiliary base, and one end of the second elastic sheet is respectively fixed at the two ends of the auxiliary bottom plate; a column perpendicular to the auxiliary bottom plate and integrated with the auxiliary bottom plate is provided at the center of the auxiliary bottom plate, baffles are respectively provided at the ends of the auxiliary bottom plates on both sides of the columns, side plates extending toward one side of the main swing frame are provided at the edges of each baffle, and buffer springs are respectively provided between the two side plates and the swing column, and the buffer springs constitute elastic buffers.

[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 a left connecting plate and a right connecting plate, the first spring plate and the second spring plate 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 transverse connecting plate is provided between the left connecting plate and the right connecting plate, and a positioning hole and mounting holes arranged on both sides of the positioning hole are provided on the transverse connecting plate, the linkage part is placed under the transverse connecting plate and the hinge shaft is inserted into the positioning hole so that the linkage part is hinged and fixed to the base.

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

[0015] The beneficial effect of the present invention is that since the swing mechanism is connected to the permanent magnet, and the permanent magnet is spaced apart from the electromagnetic assembly, the swing mechanism is avoided from being directly mechanically connected to the power source, forming a magnetic suspension structure, effectively reducing the friction resistance of the mechanical connection, reducing the working noise and vibration caused by friction, and significantly improving the hand-held grip and comfort of hair trimming tools such as razors, shavers or hair clippers. Secondly, when the permanent magnet undergoes alternating reciprocating linear motion under the action of the magnetic field of 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, which greatly improves the utilization rate of the output power of the drive mechanism and improves the energy efficiency ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural diagram of the magnetic suspension drive mechanism according to an embodiment of the present invention

[0017] Figure 2 A plan view of the magnetic suspension drive mechanism according to an embodiment of the present invention

[0018] Figure 3 for Figure 2 Sectional structure diagram at AA

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

[0020] Figure 5 A three-dimensional structural diagram of an elastic member in an embodiment of the present invention

[0021] Figure 6 A three-dimensional assembly diagram of the swing mechanism in an embodiment of the present invention

[0022] Figure 7 A three-dimensional structural diagram of the main swing frame in an embodiment of the present invention

[0023] Figure 8 A three-dimensional structural diagram of the auxiliary swing frame in an embodiment of the present invention

[0024] Fig. 9 A three-dimensional structural diagram of the base in an embodiment of the present invention

[0025] Fig.10 A partial three-dimensional cross-sectional view of the magnetic suspension drive mechanism according to an embodiment of the present invention DETAILED DESCRIPTION

[0026] The following is combined with Figures 1 to 10 The embodiments of the present invention are further described as follows:

[0027] The present invention is a magnetic suspension drive mechanism, including an electromagnetic component 1 and at least one permanent magnet 2. During use, the electromagnetic component 1 can continuously form a magnetic field with different electromagnetic poles by inputting a continuously alternating positive and negative current, while the magnetic poles of the permanent magnet 2 are fixed and unchanged. By utilizing the principle that like poles repel each other and opposite poles attract each other, the permanent magnet 2 can continuously and alternately perform linear motion under the action of the magnetic fields with different electromagnetic poles generated after the electromagnetic component 1 is powered on. In order to trim hair, the permanent magnet 2 is connected to the swing mechanism 3 and is spaced apart from the electromagnetic component 1. When the permanent magnet 2 undergoes linear motion, the swing mechanism 3 can synchronously follow the displacement of the permanent magnet 2 to form a reciprocating swing, and the swing mechanism 3 can drive the moving knife in the hair trimming tool to swing back and forth along the static knife to cut hair. The technical solution does not involve improvements in the hair trimming tool, and the assembly diagram of the hair trimming tool is not shown in the figure. Since 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 is prevented from being directly mechanically connected to the power source, forming a magnetic suspension structure, effectively reducing the friction resistance of the mechanical connection, reducing the working noise and vibration caused by friction, and significantly improving the hand-held grip and comfort of hair trimming tools such as shavers, shavers or hair clippers. Secondly, when the permanent magnet 2 undergoes alternating reciprocating linear motion under the action of the magnetic field of 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, which greatly improves the utilization rate of the output power of the drive mechanism and improves the energy efficiency ratio.

[0028] In order to ensure the continuity and stability 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, the swing mechanism 3 does not have a reset force. After the electromagnetic component 1 is powered on, the magnetic field generated drives the permanent magnet 2 to move linearly in one direction. When the current of the electromagnetic component 1 is disconnected, there is no external magnetic field acting on the permanent magnet 2. The permanent magnet 2 will stay at the end of the linear motion and will not automatically reset to stay in the middle. 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 of the permanent magnet 2 near the middle. The permanent magnet 2 cannot react immediately and move linearly in the opposite direction, resulting in the discontinuity of the linear motion of the permanent magnet 2 and the swing mechanism 3, causing jamming. In this regard, 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 connected and fixed to the base 5, so that the swing mechanism 3 can be horizontally displaced, and can be automatically reset and suspended in the base 5 when the external force disappears; and when the current direction 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 the opposite direction, 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. By providing the elastic member 4, the swing mechanism 3 and the permanent magnet 2 can be automatically reset when the permanent magnet 2 loses the external driving force at the moment when the electromagnetic assembly 1 switches the current direction, and an external thrust or guiding force is provided for the reverse linear movement of the swing mechanism 3 and the permanent magnet 2, so that the linear movement of the permanent magnet 2 is more stable and coherent when the electromagnetic assembly 1 switches the current direction, thereby ensuring the hair trimming performance of hair trimming tools such as shavers, shavers or barber scissors.

[0029] In order to reduce the vibration feeling when the magnetic suspension drive mechanism is used, the swing mechanism 3 includes a main swing frame 31 and a sub-swing frame 32, and the permanent magnet 2 is provided with at least one connection fixed to the bottom of the main swing frame 31 and / or the sub-swing frame 32 and spaced from the electromagnetic assembly 1; the two ends of the main swing frame 31 and the sub-swing frame 32 are respectively connected to the elastic member 4, so that the main swing frame 31 and the sub-swing frame 32 can be independently horizontally displaced and automatically reset and suspended in the base 5. By setting the swing mechanism 3 as a separate main swing frame 31 and sub-swing frame 32, when there is one permanent magnet 2, it is preferentially set at the bottom of the main swing frame 31; and when there are two permanent magnets 2, they can be fixed at the bottom of the main swing frame 31 and the sub-swing frame 32 respectively, and the magnetic poles of the same end of the two permanent magnets 2 are opposite. Regardless of whether one or two permanent magnets 2 are provided, the main swing frame 31 and the auxiliary swing frame 32 are synchronously reciprocated in opposite directions, and the impact force formed by the movement inertia of the main swing frame 31 and the auxiliary swing frame 32 is offset by each other by controlling the swing directions of the main swing frame 31 and the auxiliary swing frame 32, so that the vibration sense during the use of the driving mechanism can be effectively reduced, and the hand-held grip and use comfort of the hair trimming tool can be improved. Of course, after the swing mechanism 3 is set 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 synchronously reciprocated in the same direction, which will only increase the vibration sense, but will not affect the hair trimming performance of the hair trimming tool. The specific setting 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 main swing frame 31 and the auxiliary swing frame 32 can independently reset themselves or have the inertia and stability to swing back and forth after losing the electromagnetic driving force generated by the electromagnetic component 1 being energized, the elastic member 4 includes a first elastic piece 41 suspended in the base 5 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 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. 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 be automatically reset under the elastic force of their own 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 running stability of the driving mechanism.

[0031] In order to facilitate the production, processing and assembly of the elastic member 4, one end of the first spring clip 41 and the second spring clip 42 connected to the main swing frame 31 and the auxiliary swing frame 32 is 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 so as to be horizontally displaceable, and the main swing frame 31 and the auxiliary swing frame 32 are automatically reset under the elastic action of the first spring clip 41 and the second spring clip 42; permanent magnets 2 are respectively provided at the bottom of the main swing frame 31 and the auxiliary swing frame 32 and are spaced from the electromagnetic assembly 1. By connecting one end of the first spring clip 41 and the second spring clip 42 as a whole and the other end being independent of each other, during production, it is only necessary to punch out the separation groove 43 at the connection between the first spring clip 41 and the second spring clip 42, so that the first spring clip 41 and the second spring clip 42 can be formed as a whole, which not only improves production efficiency, but also facilitates the assembly of the elastic member 4 and improves 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 they 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 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 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 added between the main swing frame 31 and the auxiliary swing frame 32, and the driving shaft 33 and the linkage shaft 64 installed on the main swing frame 31 and the auxiliary swing frame 32 are connected to the linkage member 6, so that the reciprocating swing frequency of the main swing frame 31 and the auxiliary swing frame 32 can be forced to be consistent, and the impact force of the reciprocating swing process of the main swing frame 31 and the auxiliary swing frame 32 can be offset to the greatest extent, effectively reducing the vibration and synchronization of the driving mechanism when in use. Of course, the length of the linkage shaft 64 installed in the auxiliary swing frame 32 can also be extended so that the workpiece can be installed at the end of the linkage shaft 64, so that the linkage shaft 64 and the end of the driving shaft 33 can be used to install the workpiece respectively, and different workpieces can be cross-reciprocated 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 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 reciprocating swing of the permanent magnet 2, the length of the linkage hole 63 is greater than the diameter of the driving shaft 33 and the linkage shaft 64, so that the driving shaft 33 and the linkage shaft 64 can be displaced along the linkage hole 63 to cause the linkage member 6 to deflect at an angle along the hinge shaft 62, forcing the reciprocating swing frequencies 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 due to the linkage member 6 and causing jamming.

[0034] At the moment when the main swing frame 31 and the auxiliary swing frame 32 switch the swing direction following the linear motion of the permanent magnet 2, under the action of inertia, the main swing frame 31 and the auxiliary swing frame 32 will generate a large impact force, resulting in a strong vibration of the swing mechanism 3, and even causing the main swing frame 31 and the auxiliary swing frame 32 to move up and down, affecting the trimming performance of the hair trimming tool. In this regard, an elastic buffer 7 is further provided between the main swing frame 31 and the auxiliary swing frame 32, and the two ends of the elastic buffer 7 are pressed against the main swing frame 31 and the auxiliary swing frame 32 respectively. Since the main swing frame 31 and the auxiliary swing frame 32 swing back and forth alternately in opposite directions synchronously under the restriction of the linkage member 6, when the elastic buffer member 7 is between the main swing frame 31 and the auxiliary swing frame 32, the inertial impact force generated by the main swing frame 31 when switching directions driven by the permanent magnet 2 can be directly absorbed by the elastic buffer member 7 and cause the elastic buffer member 7 to generate a reaction force, so that the reaction force is directly applied to the main swing frame 31, thereby improving the reaction sensitivity and continuous inertia of the main swing frame 31 and the permanent magnet 2 when switching the swing direction, effectively preventing the main swing frame 31 from getting stuck when switching the swing direction, and improving the stability of the reciprocating swing of the main swing frame 31. Secondly, under the action of the elastic buffer member 7, the inertial impact force of the main swing frame 31 when switching the swing will not directly impact the base 5, reducing the vibration and working noise during the reciprocating swing of the main swing frame 31, and improving the hand-held grip and comfort of the hair trimming tool when in use. Since the auxiliary swing frame 32 swings in opposite directions 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 sheet 41 is respectively 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 a socket 313 set in the swing column 312, and the other end is used to install a workpiece. The workpiece mainly refers to a movable knife in a hair trimming tool such as a shaver, a shaver or a hair clipper. The drive shaft 33 is used to drive the movable knife to swing back and forth along the stationary knife to cut the hair. The auxiliary swing frame 32 includes an auxiliary base 321, one end of the second elastic sheet 42 is respectively fixed at the two ends of the auxiliary base 321, so that the auxiliary swing 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 swing frame 32 and the main swing frame 31 are linked under the restriction of the linkage member 6, so as to ensure the synchronization of the auxiliary swing frame 32 and the main swing frame 31 to offset the vibration generated by the main swing frame 31 and the auxiliary swing frame 32 during the reciprocating swing process.

[0036] In order to facilitate the elastic buffer 7 to absorb the inertial impact force of the main swing frame 31 and the auxiliary swing frame 32 when switching directions, and to use the reaction force formed by the inertial impact force to improve the reaction sensitivity of the main swing frame 31 and the auxiliary swing frame 32 when switching the swing direction, baffles 323 are respectively provided at the ends of the auxiliary base 321 on both sides of the column 322, and side plates 324 extending toward one side of the main swing frame 31 are provided at the edge of each baffle 323, and buffer springs are respectively provided between the two side plates 324 and the swing column 312, and the buffer springs constitute the elastic buffer 7. By providing the side plates 324 extending toward one side of the main bottom plate 311 at both ends of the auxiliary base 321, when assembling the buffer spring, the two ends of the buffer spring can be directly pressed against the side plates 324 and the swing column 312, thereby avoiding radial and axial torsion or dislocation of the buffer spring during assembly or use, and ensuring the elastic force of the buffer spring to the greatest extent. The side plate 324 and the pendulum column 312 are used to limit the buffer spring, which prevents the inertial impact force generated by the main pendulum frame 31 or the auxiliary pendulum frame 32 when switching directions from being directly transmitted to the base 5, reduces the impact force borne by the base 5, and alleviates the vibration of the base 5. In the actual production and assembly process, in order to reduce the production cost, the main pendulum frame 31 and the auxiliary pendulum frame 32 are both made of plastic material by integral injection molding. Since the strength of the plastic material is lower than that of the metal, in order to ensure the use effect of the elastic buffer 7, a seat hole 326 is provided on the side plate 324, and a metal spring seat 325 is installed in the seat hole 326 to limit the buffer spring and ensure the use stability of the elastic buffer 7. Secondly, the main pendulum frame 31 and the auxiliary pendulum frame 32 are respectively connected to the metal sheet 34 by bolts, and the permanent magnet 2 is magnetically connected and fixed to the metal sheet 34, so that the material cost of the main pendulum frame 31 and the auxiliary pendulum frame 32 can be reduced, and the first spring sheet 41 and the second spring sheet 42 are respectively connected to the end of the metal sheet 34.

[0037] In order to facilitate the overall assembly of the magnetic suspension drive mechanism and improve the assembly efficiency, the base 5 includes a front wall 51 and a rear wall 52 arranged opposite to each other, the lower ends of the front wall 51 and the rear wall 52 are respectively fixed on the two sides of the electromagnetic assembly 1, and the other ends are respectively connected to each other through the left connecting plate 53 and the right connecting plate 54. The front wall 51 and the rear wall 52 are connected to each other as a whole by using the left connecting plate 53 and the right connecting plate 54 to make the base 5 present an integral frame structure. In this way, the first elastic sheet 41 and the second elastic sheet 42 can be respectively fixed on the left connecting plate 53 and the right connecting plate 54, and the main swing frame 31 and the auxiliary swing frame 32, the elastic buffer 7 and the permanent magnet 2 installed at the bottom of the main swing frame 31 and the auxiliary swing frame 32 are suspended as a whole in the base 5 above the electromagnetic assembly 1, and each permanent magnet 2 is respectively arranged at a distance from the electromagnetic assembly 1, which not only avoids the direct contact between the swing mechanism 3 and the electromagnetic assembly 1, reduces the friction resistance, and reduces the working noise; at the same time, it can also greatly facilitate the assembly of the magnetic suspension drive mechanism and improve the assembly efficiency.

[0038] In order to facilitate the 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 transverse connecting plate 55 is provided between the left connecting plate 53 and the right connecting plate 54, and a positioning hole 56 and mounting holes 57 are provided on the transverse connecting plate 55 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 hinged and fixed to the base 5. The transverse connecting plate 55 can not only increase the connection firmness between the front wall 51 and the rear wall 52, but also serve as a base for installing the linkage member 6, which is convenient for the assembly of the linkage member 6 and the installation firmness of the linkage member 6. Secondly, through the mounting holes 57 on the transverse connecting plate 55, when the magnetic suspension drive mechanism is assembled in the body of the hair trimming tool (not shown in the figure), the installation firmness of the magnetic suspension drive mechanism is ensured.

[0039] In a specific embodiment, the electromagnetic assembly 1 includes 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. By directly providing fixing holes and fastening holes 13 at the upper and lower ends of the silicon steel sheet, the bolts in the fixing holes can be used to directly connect with the front wall 51 and the rear wall 52 of the base 5 during assembly, thereby reducing the protective shell wrapped around the yoke 11 and the coil 12, improving assembly efficiency, and reducing the protective shell component, thereby reducing material costs. The fastening hole 13 can ensure the overall firmness of the drive mechanism when it is installed in the housing of the hair trimming tool as a whole. That is, the upper end of the drive mechanism is connected and fixed to the housing of the hair trimming tool by inserting screws through the mounting holes 57 in the mounting plate of the base 5, and the lower end is fixedly connected to the housing of the hair trimming tool by inserting screws into the fastening hole 13, thereby ensuring that the magnetic suspension drive mechanism is firmly fixed in the housing of the hair trimming tool as a whole.

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

Claims

1. A magnetic suspension drive mechanism, comprising an electromagnetic component (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 connected and fixed 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 the opposite direction, 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 suspension 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 arranged at a distance 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 horizontally displaced and automatically reset to be suspended in the base (5).

3. The magnetic suspension 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 suspension drive mechanism according to claim 3, characterized in that One end of the first spring sheet (41) and the second spring sheet (42) connected to the main swing frame (31) and the auxiliary swing frame (32) is 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 sheet (41) and the second spring sheet (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 suspension 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 (6) is connected to the base (5) via 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) so that the main swing frame (31) and the auxiliary swing frame (32) can swing back and forth synchronously in opposite directions.

6. The magnetic suspension 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 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) can swing back and forth in opposite directions.

7. The magnetic suspension 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 suspension drive mechanism according to claim 7, characterized in that The main swing frame (31) comprises a main bottom plate (311), one end of a first elastic sheet (41) is respectively fixed to two ends of the main bottom plate (311); a swing column (312) is provided at the center of the main bottom plate (311) and is perpendicular to the main bottom plate (311) and is an integral structure with the main bottom plate (311); the driving shaft (33) is inserted into a socket (313) provided in the swing column (312); the auxiliary swing frame (32) comprises an auxiliary base (321), one end of a second elastic sheet (42) is respectively fixed to the auxiliary base (321) two 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 provided at the ends of the auxiliary base (321) on both sides of the column (322); side plates (324) extending toward one side of the main swing frame (31) are provided at the edges of each baffle (323); buffer springs are provided between the two side plates (324) and the swing column (312); the buffer springs constitute elastic buffer members (7).

9. The magnetic suspension drive mechanism according to claim 3, characterized in that The base (5) comprises a front wall (51) and a rear wall (52) which 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 respectively connected to form a whole through a left connecting plate (53) and a right connecting plate (54). The first spring sheet (41) and the second spring sheet (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 on 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 arranged at intervals; a transverse connecting plate (55) is arranged between the left connecting plate (53) and the right connecting plate (54); a positioning hole (56) and mounting holes (57) arranged on both sides of the positioning hole (56) are provided on the transverse connecting plate (55); a linkage member (6) is arranged below the transverse connecting plate (55) and a 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 suspension 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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