Reciprocating single drive linear motor

Abstract

This utility model relates to a reciprocating independent-drive linear motor, comprising: a bracket extending along a first direction; two sets of stator assemblies mounted on the bracket, each set of stator assemblies including a coil; and two sets of mover assemblies mounted on the bracket, each set of mover assemblies including a magnet, the magnetic poles of the magnet extending along the first direction. Each set of stator assemblies corresponds to one set of mover assemblies, and the coils are independently configured and connected to their respective electrical control terminals. During operation, the coils can be independently controlled to generate virtual magnetic poles on their respective stator assemblies, close to the corresponding magnets extending along the first direction, thereby driving the corresponding mover assemblies to reciprocate independently along the first direction. This utility model overcomes the shortcomings of traditional linear motors with a single vibration mode, meeting the diverse needs of different customers for vibration parameters.

Description

Technical Field

[0001] This utility model relates to the field of motors, and in particular to a reciprocating single-drive linear motor. Background Technology

[0002] A linear motor is a device that directly converts electrical energy into linear motion without the need for an intermediate transmission mechanism. It has advantages such as simple structure, fast response, and high precision. Traditional linear motors often use a single coil driving a single mover design, but in scenarios requiring multiple degrees of freedom or independent control of multiple output shafts, this design suffers from problems such as complex structure, low control precision, and significant vibration interference.

[0003] However, existing linear motors still have some technical problems. First, traditional linear motors typically use a parallel coil design, with each coil sharing the same current parameter. This makes it impossible to achieve independent control of each coil, resulting in a single vibration mode and making it difficult to meet the diverse vibration parameter requirements of different application scenarios.

[0004] The information disclosed in the background section of this utility model is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a reciprocating independent drive linear motor, which enables independent adjustment of the current parameters of each coil, thereby allowing precise control of the vibration mode. This overcomes the shortcomings of traditional linear motors with a single vibration mode and meets the diverse needs of different customers for vibration parameters.

[0006] This utility model provides a reciprocating independent-drive linear motor, comprising: a bracket extending along a first direction; two sets of stator assemblies mounted on the bracket, each set of stator assemblies including a coil; and two sets of mover assemblies mounted on the bracket, each set of mover assemblies including a magnet, the magnetic poles of the magnet extending along the first direction; wherein each set of stator assemblies corresponds to a set of mover assemblies, and the coils are independently configured and connected to their respective electrical control terminals; during operation, the coils can be independently controlled to generate virtual magnetic poles extending along the first direction near the corresponding magnets on their respective stator assemblies, thereby driving the corresponding mover assemblies to reciprocate independently along the first direction.

[0007] Preferably, the bracket includes: a bracket body; and two sets of spring clip assemblies, each set of spring clip assemblies including two positioning spring clips and a mounting frame, the two positioning spring clips being distributed on both sides of the bracket body along a first direction, the two ends of the mounting frame being connected to the top ends of the two positioning spring clips, and the mounting frame having a mounting groove on the side facing the bracket body.

[0008] Preferably, the moving part assembly further includes: a magnetic strip, which is installed in the mounting groove, and the magnet is installed on the magnetic strip.

[0009] Preferably, the stator assembly further includes: a stator core fixed on the bracket, and the coil wound on the stator core.

[0010] Preferably, the stator assembly further includes a wire frame disposed between the stator core and the coil.

[0011] Preferably, the bracket further includes: a connecting portion, through which two sets of spring sheet assemblies are connected, the connecting portion being distributed on both sides of the spring sheet assembly along a first direction and spaced apart from the spring sheet assembly so as to be elastically deformable.

[0012] Preferably, the connecting portion is annular.

[0013] Preferably, the bottom of the support body is provided with a socket, and the stator core is installed in the socket.

[0014] Preferably, the two coils can be independently controlled to drive the two sets of mover assemblies to reciprocate in opposite directions along the first direction.

[0015] Preferably, the mounting frame is provided with mounting holes configured for mounting the output shaft assembly.

[0016] This utility model of a reciprocating single-drive linear motor, by setting two independent coils, each of which can be controlled individually, realizes independent adjustment of the current parameters of each coil, thereby enabling precise control of the vibration mode. This overcomes the shortcomings of traditional linear motors with a single vibration mode and meets the diverse needs of different customers for vibration parameters.

[0017] The method and apparatus of this invention have other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and subsequent embodiments incorporated herein, which together serve to explain the particular principles of this invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the reciprocating single-drive linear motor according to the embodiment of this utility model.

[0019] Figure 2 for Figure 1 The main view;

[0020] Figure 3 for Figure 1 An explosion diagram;

[0021] Figure 4 This is a schematic diagram of the structure of the support body;

[0022] Figure 5 This is a structural schematic diagram of the support body from another perspective;

[0023] Figure 6 This is a schematic diagram of the stator core structure;

[0024] Figure 7 This is a schematic diagram illustrating the working principle of the reciprocating single-drive linear motor according to the embodiment of this utility model. Figure 1 ;

[0025] Figure 8 This is a schematic diagram illustrating the working principle of the reciprocating single-drive linear motor according to the embodiment of this utility model. Figure 2 .

[0026] Explanation of reference numerals in the attached figures:

[0027] 100. Bracket; 110. Bracket body; 111. Insertion hole; 150. Connecting part;

[0028] 200. Stator assembly; 201. Coil; 202. Stator core; 203. Wire frame; 204. Magnetic shoe section; 205. First inter-pole protrusion; 206. Second inter-pole protrusion;

[0029] 300. Stator assembly;

[0030] 400. Moving part assembly; 401. Magnet; 402. Magnetic strip;

[0031] 500, Moving component;

[0032] 600. Spring assembly; 610. Positioning spring; 620. Mounting frame; 621. Mounting slot; 622. Mounting hole; 623. Limiting stage;

[0033] 700. Spring assembly.

[0034] It should be understood that the accompanying drawings are not necessarily drawn to scale, but rather present simplified representations of various features to illustrate the basic principles of this invention. The specific design features disclosed in this invention (including, for example, specific dimensions, orientations, positions, and shapes) will be determined in part by the specific application and environment in which they will be used.

[0035] Throughout these figures, the same reference numerals denote the same or equivalent parts of the present invention. Detailed Implementation

[0036] The present invention will now be described in detail with reference to various embodiments, examples of which are presented in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the present invention to these exemplary embodiments. Rather, the present invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments that may be included within the spirit of the present invention and the scope defined by the appended claims.

[0037] When a component is referred to as being "above" or "on top of" another component, the component may be in contact with the other component, or the component may be spaced apart from the other component, or there may be an intermediate component between the component and the other component.

[0038] The following is combined with Figures 1 to 8 The reciprocating single-drive linear motor according to the embodiment of this utility model will be described.

[0039] like Figures 1 to 3 As shown, the reciprocating single-drive linear motor of this utility model embodiment includes: a bracket 100, two sets of stator assemblies and two sets of mover assemblies.

[0040] The bracket 100 extends along the first direction, providing structural support and positioning reference for the entire reciprocating single-drive linear motor.

[0041] Two sets of stator assemblies are mounted on the bracket 100, and each set of stator assemblies includes a coil 201. The two sets of stator assemblies include stator assembly 200 and stator assembly 300.

[0042] Two sets of mover assemblies are mounted on the bracket 100. Each set of mover assemblies includes a magnet 401, the magnetic poles of which extend along a first direction. The two sets of mover assemblies include mover assembly 400 and mover assembly 500.

[0043] Each set of stator components corresponds to a set of mover components, and the coils 201 are independently set and connected to their respective electrical control terminals.

[0044] During operation, coils 201 can be independently controlled to generate virtual magnetic poles close to the corresponding magnets 401 on their respective stator assemblies, thereby driving the corresponding mover assemblies to reciprocate independently along the first direction. That is, the virtual magnetic poles generated by coils 201 of stator assembly 200 drive mover assembly 400 to reciprocate along the first direction, and the virtual magnetic poles generated by coils 201 of stator assembly 300 drive mover assembly 500 to reciprocate along the first direction.

[0045] This invention, by setting two independent coils, each of which can be controlled individually, enables independent adjustment of the current parameters of each coil, thereby allowing precise control of the vibration mode. This overcomes the shortcomings of traditional linear motors with their single vibration mode and meets the diverse needs of different customers for vibration parameters.

[0046] In an exemplary embodiment, in order to balance lightweight, high strength and good machinability, the bracket body 110 is preferably made of high-strength engineering plastic integrally molded by injection molding, or made of aluminum alloy by die casting or CNC machining.

[0047] As a permanent magnet source for magnetic field interaction, magnet 401 can be made of high-performance rare-earth permanent magnet materials, such as neodymium iron boron or samarium cobalt. These materials have extremely high magnetic energy product and coercivity, enabling them to provide extremely strong magnetic fields within a limited space. The shape of magnet 401 can be rectangular, cylindrical, or arc-shaped to maximize the use of installation space. Magnet 401 can be a single magnet or composed of multiple smaller magnets arranged in polarity.

[0048] In an exemplary implementation, such as Figure 1 and Figure 4 As shown, the bracket 100 includes: a bracket body 110 and two sets of spring clip assemblies.

[0049] The bracket body 110 is used to support two sets of spring clip assemblies.

[0050] like Figure 4 and Figure 5 As shown, the two sets of spring clip assemblies include spring clip assembly 600 and spring clip assembly 700. Each set of spring clip assemblies includes two positioning spring clips 610 and a mounting frame 620. The two positioning spring clips 610 are distributed on both sides of the bracket body 110 along the first direction. The two ends of the mounting frame 620 are connected to the tops of the two positioning spring clips 610. The mounting frame 620 is provided with a mounting groove 621 on the side facing the bracket body 110.

[0051] In an exemplary embodiment, the positioning spring 610 can be made of a metallic material with extremely high fatigue strength, excellent elasticity, and good corrosion resistance, such as beryllium bronze or high-performance stainless steel. The positioning spring 610 is fixed to a pre-designed boss or groove on the bracket body 110 by a mounting part formed by precision stamping and by riveting, laser welding, or special adhesives.

[0052] The end of the positioning spring 610 furthest from the support body 110 is a free end, which is connected to both ends of the mounting frame 620 using the same process. Its working principle is as follows: when the mover assembly drives the mounting frame 620 to move in the first direction, the two positioning springs 610 will synchronously undergo elastic deformation. When the driving force is removed or reversed, the elastic deformation can assist the mover assembly in quickly returning to the equilibrium position or accelerating in the opposite direction. This not only greatly reduces the energy required for reversal and improves efficiency, but also ensures smooth and precise movement through the linear restoring force it provides.

[0053] The mounting frame 620 may be made of lightweight aluminum alloy or high-strength engineering plastic. The mounting frame 620 is used to mount the mover assembly and the final load (i.e., the output shaft assembly). The two ends of the mounting frame 620 are rigidly connected to the top ends of two locating springs 610 in the manner described above, thereby enabling it to translate in a first direction as the locating springs 610 deform.

[0054] By setting the positioning spring 610, an appropriate distance can be ensured between the magnet 401 and the coil 201, so as to meet the displacement deformation requirements during linear motion.

[0055] Furthermore, to significantly improve the durability and stability of the positioning spring 610, electrochemical polishing of its surface can be considered. This polishing treatment can effectively eliminate micro-cracks on the surface, thereby reducing the risk of material fatigue and fracture caused by crack propagation.

[0056] Furthermore, to further enhance the performance of the positioning spring 610, a layer of gold or nickel-phosphorus alloy with a thickness of approximately 1-2 micrometers can be plated onto the polished surface. This plating not only provides excellent contact resistance performance, ensuring the stability and reliability of the electrical connection, but also significantly improves the spring's corrosion resistance. Especially in applications in humid environments, such as electric toothbrushes, this plating effectively resists the erosion of moisture and corrosive substances, thereby greatly extending the service life of the positioning spring and ensuring that it maintains good performance during long-term use.

[0057] In an exemplary implementation, such as Figures 1 to 3 As shown, the moving part assembly further includes a magnetic strip 402, which is installed in the mounting groove 621, and a magnet 401 is installed on the magnetic strip 402.

[0058] The magnetic strip 402 can be made of a soft magnetic material with high permeability, low coercivity, and low remanence, such as electrical pure iron, high silicon steel sheet, or amorphous nanocrystalline alloy. The magnetic strip 402 is precisely pressed into or bonded to the mounting groove 621 of the mounting frame 620.

[0059] Without the magnetic stripe, the magnetic field lines generated by the magnet 401 are relatively dispersed in the surrounding space, and some magnetic field lines (i.e., magnetic flux) do not effectively pass through the stator core 202. The magnetic stripe 402 can efficiently guide and concentrate most of the dispersed magnetic field lines emitted by the magnet 401 into its own interior, and then guide them to the region of the magnetic shoe portion 204 facing the stator core 202, which will be described later. This significantly enhances the local magnetic field strength (magnetic flux density) at the working air gap between the stator assembly and the mover assembly, thereby greatly improving the power density and drive efficiency of the motor.

[0060] In an exemplary implementation, such as Figure 2 As shown, the stator assembly further includes a stator core 202, which is fixed on the bracket 100, and a coil 201 is wound around the stator core 202 to form an effective electromagnetic induction structure.

[0061] To minimize eddy current and hysteresis losses, especially in high-frequency AC magnetic field environments, the stator core 202 can be constructed from multiple layers of high-performance silicon steel sheets through precision stamping and lamination processes, followed by secure connection via riveting or advanced laser welding. This multi-layered lamination structure effectively reduces eddy currents and hysteresis, improving overall performance. Alternatively, another feasible manufacturing method is to use soft magnetic composite materials, achieving integral molding through powder metallurgy. This method also significantly reduces losses and enhances the overall performance of the stator core.

[0062] In an exemplary implementation, such as Figure 2 and Figure 3 As shown, the stator assembly further includes a wire frame 203 disposed between the stator core 202 and the coil 201.

[0063] The coil frame 203 is made of insulating material, such as engineering plastics like polyphenylene sulfide, polyamide, and polyethylene terephthalate, which possess good insulation properties and mechanical strength. The shape of the coil frame 203 matches the shape of the stator core 202, forming a ring structure for easy mounting on the outer circumference of the stator core 202. On one hand, the coil frame 203 provides reliable electrical insulation between the stator core 202 and the coil 201, preventing inter-turn short circuits or short circuits to ground. On the other hand, the coil frame 203 provides a regular support body with a specific winding width for the winding of the coil 201, allowing the coil 201 to be better wound on the stator core 202 and maintain a stable shape.

[0064] Furthermore, the wire frame 203 can be integrated with terminals or lead slots, which makes it easier to lead out the end of the coil 201 and to make a stable and efficient connection with external wires, thereby improving the connection reliability and ease of operation of the overall device.

[0065] In an exemplary embodiment, coil 201 may be made of high-strength enameled copper wire.

[0066] In an exemplary implementation, such as Figure 1 , Figure 2 and Figure 4 As shown, the bracket 100 further includes a connecting portion 150, through which the two sets of spring sheet assemblies are connected. The connecting portion 150 is distributed on both sides of the spring sheet assembly along the first direction and is spaced apart from the spring sheet assembly, allowing for elastic deformation. That is, in the first direction, the connecting portion 150 closer to the negative direction of the first direction is closer to the negative direction than the spring sheet assembly 600 and spring sheet assembly 700 which are also closer to the negative direction. The connecting portion 150 closer to the positive direction of the first direction is closer to the positive direction than the spring sheet assembly 600 and spring sheet assembly 700 which are also closer to the positive direction. In other words, in the first direction, the spring sheet assembly 600 and spring sheet assembly 700 are located between the two connecting portions 150.

[0067] Connecting the two sets of spring assemblies allows for the use of elasticity to provide force for their reset and reversing movements, enabling both sets of spring assemblies to respond quickly to reversals. Without the connecting part 150, the elasticity of the spring assemblies can still achieve reset; however, when the spring assemblies reciprocate, they need to immediately reverse direction after reaching their limit positions. Relying solely on the elasticity of the spring assemblies for reversal may not be timely. For example, excessive inertia could cause the spring assemblies to continue moving in the original direction, leading to malfunction (i.e., inability to reverse direction). Adding the connecting part 150 prevents excessive swing of the spring assemblies, facilitating timely reversal for oscillation. Since the two sets of spring assemblies are usually in opposite directions, the deformation of the connecting part 150 is greatest when each reaches its maximum position, resulting in the greatest elastic force, which effectively pulls the respective spring assemblies to reverse direction / return to center.

[0068] In an exemplary implementation, such as Figure 4 and Figure 5 As shown, the connecting part 150 is annular. This annular structure gives the connecting part good elastic deformation capability, ensuring that the two sets of spring contact assemblies maintain an appropriate relative position while allowing a certain degree of elastic displacement. The connecting part 150 is not limited to annular shape; it can be flexibly designed into various forms such as strip, wave, or S-shape, depending on actual needs and application scenarios. The key is to effectively and securely connect the two sets of spring contact assemblies, ensuring that their function and performance are not affected.

[0069] The connecting part 150 can be made of an elastic material, such as metal materials such as phosphor bronze, beryllium copper or stainless steel, or engineering plastics with good elasticity.

[0070] The connection between the connecting part 150 and the spring assembly can be integrally formed, or it can be connected by welding, riveting, or snap-fitting. In a preferred embodiment, the connecting part 150 and the spring assembly are manufactured using an integral stamping process, which can improve the stability and consistency of the overall structure, simplify the production process, and reduce manufacturing costs.

[0071] In an exemplary implementation, such as Figure 4 As shown, the bottom of the bracket body 110 is provided with a socket 111, and the stator core 202 is installed in the socket 111.

[0072] During installation, the stator core 202 can be pressed into the socket using an interference fit, or it can be secured using screws, clips, or other auxiliary fixing devices. When using an interference fit, the inner diameter of the socket is slightly smaller than the outer diameter of the stator core. By applying a certain pressure, the stator core is pressed into the socket, utilizing the elastic deformation characteristics of the material to achieve a tight fit. This effectively prevents the stator core 202 from shifting or loosening due to vibration during motor operation.

[0073] In a preferred embodiment, the two coils 201 can be alternately energized, causing the two sets of moving parts to perform alternating reciprocating motions. This motion mode can be used in applications requiring continuous and stable output. In another preferred embodiment, the two coils 201 can be energized simultaneously but in opposite directions, causing the two sets of moving parts to move in opposite directions simultaneously. This motion mode can be used in applications requiring balanced forces.

[0074] In an exemplary implementation, such as Figure 2 and Figure 6 As shown, the stator core 202 has a magnetic shoe portion 204 facing the magnet 401, and the magnetic shoe portion 204 extends along a second direction. The coil 201 is sleeved on the magnetic shoe portion 204. The second direction is perpendicular to the first direction. Additionally, the stator core 202 has two inter-pole protrusions facing the magnet 401, specifically including a first inter-pole protrusion 205 and a second inter-pole protrusion 206. In the first direction, the two inter-pole protrusions are located on both sides of the magnetic shoe portion 204.

[0075] On the one hand, the magnetic shoe section 204 can further concentrate and homogenize the magnetic flux generated by the coil, allowing it to pass through the working air gap in an optimal distribution. On the other hand, the magnetic shoe section 204 can reduce the actual physical air gap between the stator assembly and the mover assembly, thereby reducing the magnetic reluctance of the magnetic circuit.

[0076] In an exemplary implementation, such as Figure 4 As shown, the mounting frame 620 is provided with mounting holes 622, which are configured for mounting the output shaft assembly.

[0077] This utility model's reciprocating single-drive linear motor can be used in small products such as electric toothbrushes and toys. The output shaft assembly is not shown in the figure. Mounting hole 622 allows manufacturers to easily install the output shaft assembly according to their needs.

[0078] Furthermore, the mounting frame 620 is provided with four limiting stages 623. The output shaft assembly is mounted on a mounting plate (not shown in the figure), which is mounted on the mounting frame 620 by bolts and mounting holes 622 and is defined by the four limiting stages 623. When the output shaft assembly is mounted on the mounting frame 620 via the mounting plate, the output shaft assembly extends in a second direction, i.e., perpendicular to the mounting frame 620. When the mover assembly reciprocates, the output shaft assembly generates high-frequency vibration, which can be adapted to the motion pattern of a toothbrush.

[0079] The setting of the limiting stage 623 and the mounting hole 622 can, to a certain extent, prevent any micro-movement or rotation that may occur in the output shaft assembly under long-term vibration environment, ensuring that the output direction is not disordered.

[0080] A mounting frame 620 mounts one output shaft assembly to mount two independent output shaft assemblies, which allows the vibration mode of the output shaft assembly to be controlled individually, thereby meeting the vibration parameter requirements of different customers (such as electric toothbrush manufacturers).

[0081] In an exemplary embodiment, the reciprocating independent-drive linear motor of this invention also includes a controller. The controller is electrically connected to the two coils 201 and can provide independent current signals to the two coils 201 respectively, thereby achieving independent control of the two coils 201. Specifically, the controller can independently adjust key parameters such as the magnitude, frequency, and phase of the output current. By adjusting these parameters, the movement speed, acceleration, and displacement of the actuator assembly can be precisely controlled, ensuring the high efficiency and accuracy of the motor operation.

[0082] By independently controlling the two coils 201, asynchronous movement of the two sets of mover components can be achieved, or synchronous but opposite movement of the two sets of mover components can be achieved. This independent control method increases the adaptability and flexibility of the linear motor device.

[0083] In a further embodiment, the reciprocating single-drive linear motor of this invention also includes a position sensor electrically connected to the controller. The sensor detects the position information of the two sets of moving parts and feeds the position information back to the controller. The controller adjusts the current signal output to coil 201 in real time based on the position information, forming a closed-loop control to ensure that the moving parts move along a preset trajectory.

[0084] When both coils 201 are energized simultaneously but in opposite directions, the two sets of moving parts will move in opposite directions simultaneously. This motion mode can be used in applications requiring symmetrical motion. When the two coils are energized at different frequencies or phases, the two sets of moving parts will move at different rhythms. This motion mode is suitable for applications requiring coordinated but asynchronous motion.

[0085] Independent control of the two coils 201 not only enhances the functional versatility of the reciprocating single-drive linear motor but also reduces energy consumption. When only one set of mover components needs to be driven, power can be supplied to only the corresponding coil 201, while the other coil 201 remains de-energized, avoiding unnecessary energy waste. Furthermore, by precisely controlling the current of each coil 201, the output power can be adjusted according to the load conditions, further optimizing energy efficiency.

[0086] If one of the coils 201 or the mover assembly fails, the other group can still function normally, reducing the risk of the entire machine shutting down due to a partial failure.

[0087] With the independent control of the two coils 201, the reciprocating single-drive linear motor can achieve more complex and precise motion control, meeting the needs of various high-precision and high-flexibility applications.

[0088] The operation of the reciprocating single-drive linear motor of the present invention will be described below with reference to the accompanying drawings.

[0089] like Figure 7 and Figure 8 As shown, the N pole of magnet 401 faces the negative direction of the first direction, and the S pole faces the positive direction of the first direction.

[0090] The direction of the virtual magnetic pole generated by coil 201 can be changed by changing the direction of the current flowing through coil 201. Coil 201 generates a single magnetic pole on magnetic shoe 204. The pole protrusions without coil 201 are magnetized because they are in the magnetic field, thus forming corresponding magnetic poles.

[0091] like Figure 7As shown, when the virtual magnetic pole generated by coil 201 is the N pole, the first pole protrusion 205 and the second pole protrusion 206 form the S pole. Under the action of like poles repelling and unlike poles attracting, the virtual magnetic pole generated by coil 201 applies a negative magnetic force to magnet 401 in the first direction, thereby pushing magnet 401 to move in the negative direction of the first direction. During the negative movement of magnet 401 in the first direction, it will drive the mounting frame 620 to move in the negative direction of the first direction, thereby driving the connected output shaft assembly to move in the negative direction of the first direction, and causing the positioning springs 610 and connecting parts 150 on both sides of the first direction to undergo elastic deformation in the negative direction of the first direction. Specifically, the N pole generated by coil 201 and the N pole of magnet 401 in the negative direction of the first direction generate a repulsive force, thereby pushing magnet 401 to move in the negative direction of the first direction. The N pole generated by coil 201 attracts the S pole of magnet 401 in the first direction, pulling magnet 401 to move in the negative direction of the first direction. The S pole formed by the first inter-pole protrusion 205 attracts the N pole of magnet 401 in the first direction, while the S pole of the second inter-pole protrusion 206 repels the S pole of magnet 401 in the first direction. The combined effect of the repulsive force and the attractive force in the negative direction of the first direction causes magnet 401 to move in the negative direction of the first direction.

[0092] When the mover assembly 400 approaches its maximum negative stroke, the electrical control terminal precisely cuts off or reverses the current in the coil 201. At this time, the driving electromagnetic force disappears or reverses. However, due to inertia, the mover assembly still tends to continue moving in the negative direction. The positioning spring 610 and the connecting part 150, which are in an elastic deformation state, jointly apply a positive elastic force to the mover assembly in the first direction. This elastic force can stop the mover assembly from moving in the negative direction in the first direction and pull the mover assembly in the opposite direction.

[0093] like Figure 8As shown, when the virtual magnetic pole generated by coil 201 is the S pole, the first pole protrusion 205 and the second pole protrusion 206 form the N pole. Under the action of like poles repelling and unlike poles attracting, the virtual magnetic pole generated by coil 201 applies a positive magnetic force to magnet 401 in the first direction, thereby pushing magnet 401 to move in the first direction. During the positive movement of magnet 401 in the first direction, it will drive the mounting frame 620 to move in the first direction, thereby driving the connected output shaft assembly to move in the first direction, and causing the positioning springs 610 and connecting parts 150 on both sides of the first direction to undergo positive elastic deformation in the first direction. Specifically, the S pole generated by coil 201 attracts the N pole of magnet 401 in the negative first direction, thereby pulling magnet 401 to move in the first direction. The S pole generated by coil 201 repels the positive S pole of magnet 401 in the first direction, thus propelling magnet 401 to move in the first positive direction. The N pole formed by the first inter-pole protrusion 205 repels the negative N pole of magnet 401 in the first direction, while the N pole of the second inter-pole protrusion 206 attracts the positive S pole of magnet 401 in the first direction. The combined effect of the repulsive and attractive forces in the first positive direction causes magnet 401 to move in the first positive direction.

[0094] When the mover assembly 400 approaches its maximum forward stroke, the electrical control terminal precisely cuts off or reverses the current in the coil 201. At this time, the driving electromagnetic force disappears or reverses. However, due to inertia, the mover assembly still tends to continue moving in the forward direction. The positioning spring 610 and the connecting part 150, which are in an elastic deformation state, jointly apply a negative elastic force to the mover assembly in the first direction. This elastic force can stop the mover assembly from moving forward in the first direction and pull the mover assembly in the opposite direction.

[0095] In this way, by periodically changing the direction of the current flowing into the coil, the direction of the virtual magnetic poles generated by the coil 201 on the stator core can be alternately changed, thereby causing the mover assembly to periodically reciprocate in the first direction.

[0096] The elastic deformation of the positioning spring 610 helps the spring assembly 600 to change direction.

[0097] By controlling the direction of the current applied to the coils 201 of the stator assembly 200 and the coils 201 of the stator assembly 300 through the electrical control terminal, the mover assembly 400 and the mover assembly 500 move in opposite directions along the first direction, so as to make use of the force between them to increase the vibration intensity.

[0098] The reciprocating single-drive linear motor of this invention can be applied to:

[0099] (1) Personal care appliances: such as high-end electric toothbrushes, shavers, and facial cleansing devices.

[0100] (2) Medical and health equipment: such as medical massagers, fascia guns, and dental cleaning equipment.

[0101] (3) Consumer electronics: such as force feedback components for game controllers and VR gloves, and haptic feedback generators for wearable devices.

[0102] (4) Precision instruments and industrial automation: such as the micro-amplitude high-frequency vibration anti-sticking mechanism for optical components, the micro-drive unit of the vibrating feeder, the piston drive source of the small pump, etc.

[0103] For ease of interpretation and precise definition of the appended claims, the terms “upper,” “lower,” “inner,” “outer,” “above,” “below,” “above,” “below,” “upward,” “downward,” “front,” “back,” “behind,” “inner side,” “outer side,” “inward,” “outer,” “internal,” “external,” “inner,” “external,” “forward,” and “backward” are used to describe the features of the exemplary embodiments with reference to the positions of these features shown in the accompanying drawings.

[0104] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and descriptive purposes. It is not intended to be exhaustive, nor to limit the invention to the precise forms disclosed; obviously, many changes and variations are possible in accordance with the foregoing teachings. The exemplary embodiments were chosen and described to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to implement and utilize various exemplary embodiments of the invention, as well as their different alternatives and modifications. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A reciprocating single-drive linear motor, characterized in that, include: A support extending along a first direction; Two sets of stator assemblies are mounted on the bracket, and each set of stator assemblies includes coils; Two sets of mover assemblies are mounted on the bracket, each set of mover assemblies includes a magnet, the magnetic poles of the magnet extending along a first direction; Each set of stator components corresponds to a set of mover components, and the coils are independently set and connected to their respective electrical control terminals; During operation, the coils can be independently controlled to generate virtual magnetic poles on their respective stator assemblies that are close to the corresponding magnets and extend along the first direction, so as to drive the corresponding mover assemblies to reciprocate independently along the first direction.

2. The reciprocating single-drive linear motor according to claim 1, characterized in that, The support includes: The support body; and Two sets of spring clip assemblies, each set of spring clip assemblies includes two positioning spring clips and a mounting frame. The two positioning spring clips are distributed on both sides of the bracket body along a first direction. The two ends of the mounting frame are connected to the tops of the two positioning spring clips. The mounting frame has a mounting groove on the side facing the bracket body.

3. The reciprocating single-drive linear motor according to claim 2, characterized in that, The moving part component further includes: A magnetic strip is installed in the mounting groove, and the magnet is installed on the magnetic strip.

4. The reciprocating single-drive linear motor according to claim 2, characterized in that, The stator assembly further includes: The stator core is fixed on the bracket, and the coil is wound on the stator core.

5. The reciprocating single-drive linear motor according to claim 4, characterized in that, The stator assembly further includes: A wire frame is disposed between the stator core and the coil.

6. The reciprocating single-drive linear motor according to claim 2, characterized in that, The stent further includes: The connecting part connects the two sets of spring sheet assemblies. The connecting part is distributed on both sides of the spring sheet assembly along the first direction and is spaced apart from the spring sheet assembly so that it can be elastically deformed.

7. The reciprocating single-drive linear motor according to claim 6, characterized in that, The connecting part is ring-shaped.

8. The reciprocating single-drive linear motor according to claim 4, characterized in that, The bottom of the bracket body is provided with a socket, and the stator core is installed in the socket.

9. The reciprocating single-drive linear motor according to claim 4, characterized in that, The two coils can be independently controlled to drive two sets of mover assemblies to reciprocate in opposite directions along the first direction.

10. The reciprocating single-drive linear motor according to claim 2, characterized in that, The mounting frame is provided with mounting holes configured for mounting the output shaft assembly.

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