Linear motor

Abstract

The invention provides a linear motor. The linear motor comprises a shell, an electromagnetic assembly, a permanent magnet assembly and a movable body assembly, the shell comprises two movable parts arranged on the upper portion of the shell and a base arranged on the lower portion of the shell, the shell further comprises an elastic assembly, and the two movable parts are fixedly connected with the base through the elastic assembly and are integrally formed. A containing cavity is formed between the movable parts and the base, the two permanent magnet assemblies are fixedly connected to the lower portions of the two movable parts respectively, the two movable body assemblies are fixedly connected to the upper portions of the two movable parts respectively, the electromagnetic assembly is arranged in the containing cavity, the permanent magnet assemblies face the electromagnetic assembly, and gaps are formed between the permanent magnet assemblies and the electromagnetic assembly; second grooves extending in the thickness direction of the lower motor are formed in the two opposite sides in the containing cavity, second positioning blocks corresponding to the second grooves are arranged on the electromagnetic assembly, and when the electromagnetic assembly is installed in the containing cavity from the side face of the shell, the second positioning blocks are connected in a clamped mode along the second grooves so as to position the position of the electromagnetic assembly.

Description

Technical Field

[0001] This invention belongs to the technical field of linear actuator devices, and specifically relates to a linear motor. Background Technology

[0002] In the field of electric shavers, the linear actuator (linear motor) is the core power component. Its core function is to convert rotational motion or other forms of energy into linear reciprocating motion (or vibration). Traditional linear actuators use a rotary motor + eccentric wheel structure to drive the shaver head for cutting. However, traditional linear actuators have shortcomings in terms of structural compactness and efficiency. Currently, a new type of linear actuator has been developed that utilizes the synergistic effect of electromagnets and permanent magnets. Based on Ampere's law and the principle of magnetic field interaction, it converts electrical energy into high-frequency linear motion (reciprocating motion or vibration) to drive the shaver head to complete hair cutting. Compared with traditional linear actuators, it has advantages in efficiency, response speed, and structural compactness.

[0003] However, current linear actuators use an opening at the bottom. During installation, the electromagnet is installed into the linear actuator from bottom to top. This method has at least the following problems: First, after the electric shaver has been used for a long time, the position of the electromagnet may become loose or shift, thus affecting the efficiency of the magnetic field. Second, since the electromagnet is installed through an opening at the bottom of the linear actuator, it will affect the torsional performance of the linear actuator.

[0004] Therefore, a more rationally structured linear actuator needs to be redesigned. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a linear motor with a reasonable structure and good torsional resistance.

[0006] To address the aforementioned technical problems, the present invention provides a linear motor, comprising a housing, an electromagnetic component, a permanent magnet component, and a movable body component;

[0007] The housing includes two movable parts disposed on the upper part of the housing and a base disposed on the lower part of the housing. The housing also includes an elastic component, and the two movable parts are fixedly connected to the base through the elastic component and are integrally formed.

[0008] A receiving cavity is provided between the movable part and the base. Two permanent magnet components are provided and fixedly connected to the bottom of the two movable parts respectively. Two movable body components are provided and fixedly connected to the top of the two movable parts respectively. The electromagnetic component is provided in the receiving cavity. The permanent magnet component faces the electromagnetic component and has a gap between it and the electromagnetic component.

[0009] The cavity contains two opposite sides with second grooves extending along the thickness direction of the motor. The electromagnetic component has a second positioning block corresponding to the second groove. When the electromagnetic component is installed into the cavity from the side of the housing, the second positioning block engages along the second groove to position the electromagnetic component.

[0010] Preferably, the receiving cavity extends through the housing in the thickness direction of the linear motor. The receiving cavity includes a first end and a second end. The first end is open, and a first limiting part is provided at the lower part of the second end. During installation, the electromagnetic component enters the receiving cavity from the first end and is positioned by the first limiting part of the second end.

[0011] Both the first end and the second end of the receiving cavity are provided with outwardly extending first connecting portions for connecting the linear motor to external devices.

[0012] Preferably, the first connecting portions are respectively disposed on the opposite sides of the first end and the opposite sides of the second end, and the first connecting portions are integrally formed with the base and located on the outside of the electromagnetic component;

[0013] The movable part includes a first movable part and a second movable part, which can reciprocate along the length direction of the linear motor; when the linear motor is started, the first movable part and the second movable part move in opposite directions along the length direction of the linear motor, and the first connecting part is connected to an external device to fix the base relative to the first movable part and the second movable part.

[0014] Preferably, the receiving cavity includes a first cavity disposed in the movable part and a second cavity disposed in the base, the permanent magnet assembly is connected in the first cavity, and the electromagnetic assembly is connected in the second cavity; the first cavity includes a first mounting cavity in the first movable part and a second mounting cavity in the second movable part;

[0015] The permanent magnet assembly includes a first permanent magnet and a first yoke disposed in the first mounting cavity, and a second permanent magnet and a second yoke disposed in the second mounting cavity. The first permanent magnet is fixedly connected to the first yoke and disposed below the first yoke, and the second permanent magnet is fixedly connected to the second yoke and disposed below the second yoke. The first permanent magnet and the second permanent magnet are arranged facing the electromagnetic assembly. When the electromagnetic assembly is energized, the magnetic field of the electromagnetic assembly controls the first permanent magnet and the second permanent magnet to move in the length direction of the linear motor, thereby driving the first movable part and the second movable part to move.

[0016] Preferably, the first mounting cavity and the second mounting cavity are each provided with at least one first positioning block in the vertical or horizontal direction. The first positioning block protrudes inward relative to the inner wall surface of the first mounting cavity and the second mounting cavity. The first magnetic yoke and the second magnetic yoke are provided with a first groove corresponding to the first positioning block. When the permanent magnet assembly is installed into the first cavity, the first positioning block of the first mounting cavity and the second mounting cavity cooperate with the first groove of the first magnetic yoke and the second magnetic yoke to position the permanent magnet assembly.

[0017] The second cavity has a second groove extending through the thickness direction of the linear motor on both opposite sides. The electromagnetic component has a second positioning block corresponding to the second groove. When the electromagnetic component is installed in the second cavity, the second positioning block enters the second cavity along the second groove to position the electromagnetic component.

[0018] Preferably, the upper surface of the first movable part is provided with a first mounting groove that extends downward and is recessed, and the upper surface of the second movable part is provided with a second mounting groove that extends downward and is recessed.

[0019] The movable body assembly includes a first movable body and a second movable body. The first movable body includes a first mounting part, a first base, and a first shaft. The first shaft, the first base, and the first mounting part are connected and fixed in sequence from top to bottom. The first base corresponds to the second mounting groove and is engaged in the second mounting groove. When the second movable part moves, it drives the first movable body to move in the same direction. The first shaft is used to connect to external devices to drive the external devices to move.

[0020] The second movable body includes a second mounting part, a second base and a second shaft. The second shaft, the second base and the second mounting part are connected and fixed from top to bottom. The second base corresponds to the first mounting groove and is engaged in the first mounting groove.

[0021] A fourth positioning block is provided in the middle of the first mounting slot. The second mounting part is configured as a left mounting part and a right mounting part. The left mounting part is connected to the right mounting part through the second base. The left mounting part, the second base and the right mounting part form a U-shaped structure to open a clearance groove on the second base. The left mounting part and the right mounting part are respectively located on both sides of the fourth positioning block and are engaged with the first mounting slot. The first base passes through the clearance groove and is arranged crosswise with the second base. When the first movable part moves, it drives the second movable body to move in the same direction. The second shaft is used to connect external equipment to drive the external equipment to move.

[0022] Preferably, the movable body assembly further includes a third movable body, which includes a third base and a third shaft. The third shaft is disposed at one end of the third base, and the third base has a mounting hole that penetrates the third base in the vertical direction at the opposite end of the third shaft. The inner wall of the mounting hole is provided with a third groove and a limiting block. The limiting block protrudes relative to the inner wall of the mounting hole and is inclined from the bottom surface of the mounting hole to the upper surface.

[0023] The second movable body has a third positioning block corresponding to the third groove on its second base, and a positioning plate on the upper part of the second base, wherein the third positioning block is disposed on the side of the positioning plate;

[0024] The third movable body is sleeved on the second base of the second movable body through the mounting hole. When the third movable body is sleeved into the second base from top to bottom, the third groove is engaged with the third positioning block. The positioning plate moves along the limiting block and passes through the limiting block, so that the positioning plate is locked above the limiting block.

[0025] Preferably, the bottom of the first mounting groove and the second mounting groove are provided with a first connecting hole that penetrates in the vertical direction, the first mounting part and the second mounting part are provided with a second connecting hole corresponding to the first connecting hole, and the first magnetic yoke and the second magnetic yoke are provided with a third connecting hole corresponding to the first connecting hole.

[0026] The linear motor further includes a first connecting bolt, which passes sequentially through the second connecting hole, the first connecting hole, and the third connecting hole to fix the second movable body, the first magnetic yoke, and the first permanent magnet. The first movable body is fixedly connected to the second magnetic yoke and the second permanent magnet. When the electromagnetic component is energized, the magnetic field of the electromagnetic component controls the movement of the first permanent magnet and the second permanent magnet, thereby driving the first movable part and the second movable body, and the second movable part and the first movable body to move.

[0027] Preferably, the elastic component includes elastic plate assemblies respectively disposed at both ends of the housing, the upper end of the elastic plate assembly being connected and fixed to the movable part, and the lower end of the elastic plate assembly being connected and fixed to the base;

[0028] The upper end of the elastic plate assembly is provided with a first elastic part and a second elastic part. The first elastic part is fixedly connected to the first movable part, and the second elastic part is fixedly connected to the second movable part, which is used to limit the movement stroke of the first movable part and the second movable part and to reset the first movable part and the second movable part.

[0029] The elastic plate assembly includes vertically arranged elastic plates, and at least two elastic plates are provided, with an elastic cavity formed between two adjacent elastic plates.

[0030] Preferably, the elastic component further includes connecting springs respectively disposed on the outer side of the elastic plate assembly, the first end of the connecting spring being fixedly connected to the first elastic part, the second end of the connecting spring being fixedly connected to the second elastic part, and a downwardly extending connecting part being formed between the first end and the second end of the connecting spring, the connecting spring being used to limit the movement stroke of the first movable part and the second movable part and to reset the first movable part and the second movable part.

[0031] Compared to existing technologies, the linear motor of this solution has at least the following advantages:

[0032] 1. The linear motor housing of this solution uses an elastic component to connect the upper movable part of the housing and the lower base, and adopts an integral molding structure, which can improve the reset capability of the movable part during high-frequency motion and the anti-torsion performance of the base.

[0033] 2. The linear motor housing of this solution is provided with a side-entry receiving cavity. During installation, the electromagnetic component enters the receiving cavity from the side of the housing and is positioned by the cooperation of the second groove and the second positioning block. The electromagnetic component is not easy to shift or loosen during use, and the integrity of the base is guaranteed, thereby improving the torsional resistance of the base and making the structure more reasonable. Attached Figure Description

[0034] The above and other objects, features, and advantages of the invention will become clearer through a more detailed description of the preferred embodiments illustrated in the accompanying drawings. The same reference numerals denote the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of the invention.

[0035] Figure 1 This is a schematic diagram of the overall structure of a linear motor provided in an embodiment of the present invention;

[0036] Figure 2 An exploded view of a linear motor provided in an embodiment of the present invention;

[0037] Figure 3 A front view of a linear motor provided in an embodiment of the present invention;

[0038] Figure 4 A side view of a linear motor provided in an embodiment of the present invention;

[0039] Figure 5 A schematic diagram of the overall structure of the housing of a linear motor provided in an embodiment of the present invention;

[0040] Figure 6 A front view of the housing of a linear motor provided in an embodiment of the present invention;

[0041] Figure 7 A schematic diagram of the overall structure of the first magnetic yoke (second magnetic yoke) of the linear motor provided in an embodiment of the present invention;

[0042] Figure 8 A schematic diagram of the overall structure of the housing of the second movable part of the linear motor provided in an embodiment of the present invention;

[0043] Figure 9 A schematic diagram of the overall structure of the housing of the first movable part of the linear motor provided in an embodiment of the present invention;

[0044] Figure 10 This is a schematic diagram of the overall structure of the housing of the third movable body of the linear motor provided in an embodiment of the present invention.

[0045] Reference numerals: 100-Linear motor, 1-Housing, 101-Moving part, 102-Base, 103-Elastic component, 104-Receiving cavity, 105-Second groove, 106-First end, 107-Second end, 108-First limiting part, 109-First connecting part, 110-First moving part, 111-Second moving part, 112-First cavity, 113-Second cavity, 114-First mounting cavity, 115-Second mounting cavity, 116-First positioning block, 117-First mounting groove, 118-Second mounting groove, 119-Fourth positioning block, 120-First connecting hole, 121-First connecting bolt, 122-Elastic plate assembly, 123-First elastic part, 124-Second elastic part, 125-Elastic plate, 126-Elastic cavity, 127-Connecting spring, 128 - Connecting part, 2- Electromagnetic component, 201- Second positioning block, 3- Permanent magnet component, 301- First permanent magnet, 302- First yoke, 303- Second permanent magnet, 304- Second yoke, 305- First groove, 306- Third connecting hole, 4- Movable body component, 401- First movable body, 402- Second movable body, 403- First mounting part, 404- First base, 405- First shaft, 406- Second mounting part, 407- Second base, 408- Second shaft, 409- Left mounting part, 410- Right mounting part, 411- Clearance groove, 412- Third movable body, 413- Third base, 414- Third shaft, 415- Mounting hole, 416- Third groove, 417- Limiting block, 418- Third positioning block, 419- Positioning plate, 420- Second connecting hole. Detailed Implementation

[0046] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention. In this embodiment, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0047] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to and integrated with the other element, or there may be an intervening element present. The terms "mounted," "one end," "the other end," and similar expressions used in this invention are for illustrative purposes only.

[0048] Please refer to Figures 1-10 This invention provides a linear motor 100, including a housing 1, an electromagnetic component 2, a permanent magnet component 3, and a movable body component 4. It is understood that the linear motor 100 using the electromagnetic component 2 and the permanent magnet component 3 is based on the principle of Ampere's law and the interaction of magnetic fields. Specifically, the permanent magnet component 3 provides a stable magnetic field, using a permanent magnet material with a high magnetic energy product. Through design of its shape and installation position, a stable static magnetic field is formed. The electromagnetic component 2 generates a dynamic magnetic field after the coil is energized, and its direction changes with the direction of the current. The interaction between the static and dynamic magnetic fields generates a linear force. When the dynamic magnetic field of the electromagnetic component 2 is superimposed on the static magnetic field of the permanent magnet component 3, the permanent magnet component 3 experiences an Ampere force in the magnetic field, and the direction of the force changes with the direction of the current, thereby achieving reciprocating linear motion. Exemplarily, in this embodiment, the electromagnetic component 2 includes a coil and an iron core. The iron core can be made of laminated silicon steel sheets, which can reduce eddy current losses. The permanent magnet component 3 can be made of materials such as neodymium iron boron, which has a high magnetic energy product.

[0049] The housing 1 includes two movable parts 101 disposed on the upper part of the housing 1 and a base 102 disposed on the lower part of the housing 1. The housing 1 also includes an elastic component 103. The two movable parts 101 are fixedly connected to the base 102 through the elastic component 103 and are integrally formed. It can be understood that the two movable parts 101 are arranged side by side in the thickness direction of the linear motor 100. The two movable parts 101 are movably connected to the base 102 through the elastic component 103 respectively. The elastic component 103 provides the movable parts 101 with the function of limiting the position and resetting, which can prevent the movable parts 101 from deviating during high-frequency motion and ensure the stability of the motion.

[0050] A receiving cavity 104 is provided between the movable part 101 and the base 102. Two permanent magnet components 3 are provided and fixedly connected to the bottom of the two movable parts 101 respectively. Two movable body components 4 are provided and fixedly connected to the top of the two movable parts 101 respectively. The electromagnetic component 2 is provided in the receiving cavity 104. The permanent magnet components 3 face the electromagnetic component 2 and have a gap between them. It can be understood that the permanent magnet components 3 are respectively connected to the two movable parts 101, and the magnetism of the two permanent magnet components 3 is arranged in opposite directions. That is, at the same end, the magnetic poles of the two permanent magnet components 3 are opposite. With this design, when the electromagnetic component 2 generates a magnetic field in the same direction, the force acting on the permanent magnet components 3 is opposite, so that the two permanent magnet components 3 and the movable part 101 move in opposite directions. When the movable part 101 is connected to the head of the electric shaver, the two or more heads form a mutual shearing motion to complete the hair cutting.

[0051] The cavity 104 contains two opposite sides with second grooves 105 extending along the thickness direction of the motor. The electromagnetic component 2 has a second positioning block 201 corresponding to the second groove 105. When the electromagnetic component 2 is installed into the cavity 104 from the side of the housing 1, the second positioning block 201 engages along the second groove 105 to position the electromagnetic component 2. It can be understood that the base 102 closes the bottom of the housing 1 and forms the cavity 104 on the side of the housing 1. That is, the electromagnetic component 2 is installed into the cavity 104 from the side of the housing 1, and the second positioning block 201 is inserted into the second groove 105. In other words, after installation, the electromagnetic component 2 is relatively fixed to the base 102, while the permanent magnet component 3 and the movable part 101 reciprocate relative to the electromagnetic component 2.

[0052] Please refer to Figures 1-6 In this embodiment, an innovative structure is adopted to install the electromagnetic component 2 from the side, so that the movable part 101, the base 102 and the elastic component 103 of the housing 1 are integrally formed. When the movable part 101 moves relative to the base 102, the torsional resistance and stability of the base 102 can be maintained, and the electromagnetic component 2 is not easy to shift or loosen, with excellent stability.

[0053] In this embodiment, the receiving cavity 104 penetrates the housing 1 in the thickness direction of the linear motor 100. The receiving cavity 104 includes a first end 106 and a second end 107. The first end 106 is open, and a first limiting part 108 is provided at the lower part of the second end 107. During installation, the electromagnetic component 2 enters the receiving cavity 104 from the first end 106 and is positioned by the first limiting part 108 of the second end 107. It can be understood that, Figure 1As shown, the length direction of the linear motor 100 refers to the X direction, and the thickness direction refers to the Y direction. The first end 106 being open means that the first end 106 has an open structure, allowing the electromagnetic component 2 to enter the receiving cavity 104 from the first end 106. The first limiting portion 108 of the second end 107 extends upward from the bottom of the receiving cavity 104, preventing the electromagnetic component 2 from entering or falling out from the second end 107, thus limiting the electromagnetic component 2. In other embodiments, to improve the limiting of the electromagnetic component 2, it can be configured such that when the electromagnetic component 2 is fully inserted into the receiving cavity 104, the electromagnetic component 2 abuts against the first limiting portion 108.

[0054] Both the first end 106 and the second end 107 of the receiving cavity 104 are provided with outwardly extending first connecting portions 109 for connecting the linear motor 100 to external devices. It can be understood that the outward extension mentioned here is relative to the receiving cavity 104. The first connecting portion 109 is located at the lower part of the housing 1 and can be configured as a threaded hole. When the linear motor 100 is connected to an external device, it is also connected to the external device through the first connecting portion 109. At this time, even if the moving part 101 performs high-frequency movement, the stability and torsional resistance of the base 102 can be guaranteed, thereby avoiding the impact on the electromagnetic component 2 and causing changes in the electromagnetic field.

[0055] Please refer to Figures 1-6 In this embodiment, the first connecting portions 109 are respectively disposed on the opposite sides of the first end 106 and the opposite sides of the second end 107. The first connecting portions 109 are integrally formed with the base 102 and are located on the outside of the electromagnetic component 2. It can be understood that two first connecting portions 109 are disposed on the sides of the first end 106 and two first connecting portions 109 are also disposed on the sides of the second end 107, so that the base 102 is fixed by multiple first connecting portions 109. When the movable part 101 moves, it can resist the movement tendency of the movable part 101 on the base 102 when the movable part 101 reciprocates, thereby better stabilizing the position of the base 102.

[0056] The movable part 101 includes a first movable part 110 and a second movable part 111. The first movable part 110 and the second movable part 111 can reciprocate along the length direction of the linear motor 100. When the linear motor 100 is started, the first movable part 110 and the second movable part 111 move in opposite directions along the length direction of the linear motor 100. The first connecting part 109 is connected to an external device to fix the base 102 relative to the first movable part 110 and the second movable part 111. It can be understood that the permanent magnet components 3 on the first movable part 110 and the second movable part 111 have opposite magnetic directions. When the electromagnetic field generated by the electromagnetic component 2 is the same, the two sets of permanent magnet components 3 will drive the first movable part 110 and the second movable part 111 to move in opposite directions. In this embodiment, the first connecting part 109 of the first end 106 corresponds to the first movable part 110, and the first connecting part 109 of the second end 107 corresponds to the second movable part 111, which better improves the anti-torsional performance of the base 102.

[0057] In this embodiment, the receiving cavity 104 includes a first cavity 112 disposed in the movable part 101 and a second cavity 113 disposed in the base 102. The first cavity 112 is disposed above and the second cavity 113 is disposed below. The permanent magnet assembly 3 is connected in the first cavity 112 and the electromagnetic assembly 2 is connected in the second cavity 113. The first cavity 112 includes a first mounting cavity 114 in the first movable part 110 and a second mounting cavity 115 in the second movable part 111.

[0058] The permanent magnet assembly 3 includes a first permanent magnet 301 and a first yoke 302 disposed in the first mounting cavity 114, and a second permanent magnet 303 and a second yoke 304 disposed in the second mounting cavity 115. The first permanent magnet 301 is fixedly connected to the first yoke 302 and disposed below the first yoke 302. The second permanent magnet 303 is fixedly connected to the second yoke 304 and disposed below the second yoke 304. The first permanent magnet 301 and the second permanent magnet 303 are arranged facing the electromagnetic assembly 2. When the electromagnetic assembly 2 is energized, the magnetic field of the electromagnetic assembly 2 controls the first permanent magnet 301 and the second permanent magnet 303 to move along the length of the linear motor 100, thereby driving the first movable part 110 and the second movable part 111 to move. For example, the first yoke 302 and the second yoke 304 can be made of soft magnetic materials with excellent magnetic permeability, such as iron or steel, which can optimize the magnetic field distribution, improve magnetic efficiency, and enhance overall stability. Understandably, the first permanent magnet 301 and the second permanent magnet 303 are arranged toward the electromagnetic component 2, and the first permanent magnet 301 and the second permanent magnet 303 maintain a gap with the electromagnetic component 2. Under the premise of ensuring that the electromagnetic component 2 exerts a force on the first permanent magnet 301 and the second permanent magnet 303, direct contact between the two is avoided, so as to ensure the smooth movement of the first movable part 110 and the second movable part 111.

[0059] Please refer to Figures 1-6 In this embodiment, at least one first positioning block 116 is provided in the first mounting cavity 114 and the second mounting cavity 115 in the vertical or horizontal direction respectively. The first positioning block 116 protrudes inward relative to the inner wall surface of the first mounting cavity 114 and the second mounting cavity 115. The first magnetic yoke 302 and the second magnetic yoke 304 are provided with first grooves 305 corresponding to the first positioning block 116. When the permanent magnet assembly 3 is installed into the first cavity 112, the first positioning block 116 of the first mounting cavity 114 and the second mounting cavity 115 cooperates with the first grooves 305 of the first magnetic yoke 302 and the second magnetic yoke 304 to position the permanent magnet assembly 3. The first positioning block 116 protrudes inward from the inner wall surface of the first mounting cavity 114 and the second mounting cavity 115, meaning that the first positioning block 116 is disposed within the first mounting cavity 114 and the second mounting cavity 115. The first magnetic yoke 302 and the second magnetic yoke 304 have corresponding first grooves 305. When the permanent magnet assembly 3 is installed, the first positioning block 116 is engaged and fixed with the first groove 305, which can prevent the permanent magnet assembly 3 from loosening or falling off during high-frequency movement. The first positioning block 116 can be integrally formed with the housing 1, or it can be fixedly connected to the first mounting cavity 114 and the second mounting cavity 115 after the housing 1 is formed.

[0060] The second cavity 113 has two opposite sides with second grooves 105 extending through the thickness of the linear motor 100. The electromagnetic component 2 has a second positioning block 201 corresponding to the second groove 105. When the electromagnetic component 2 is installed in the second cavity 113, the second positioning block 201 enters the second cavity 113 along the second groove 105 to position the electromagnetic component 2.

[0061] Please refer to Figures 1-10 In this embodiment, the upper surface of the first movable part 110 is provided with a downwardly extending and recessed first mounting groove 117, and the upper surface of the second movable part 111 is provided with a downwardly extending and recessed second mounting groove 118.

[0062] The movable body assembly 4 includes a first movable body 401 and a second movable body 402. The first movable body 401 includes a first mounting part 403, a first base 404 and a first shaft 405. The first shaft 405, the first base 404 and the first mounting part 403 are connected and fixed from top to bottom. The first base 404 corresponds to the second mounting groove 118 and is engaged in the second mounting groove 118. When the second movable part 111 moves, it drives the first movable body 401 to move in the same direction. The first shaft 405 is used to connect external equipment to drive the external equipment to move.

[0063] The second movable body 402 includes a second mounting part 406, a second base 407, and a second shaft 408. The second shaft 408, the second base 407, and the second mounting part 406 are connected and fixed from top to bottom. The second base 407 corresponds to and is engaged with the first mounting groove 117. It can be understood that the first movable body 401 and the second movable body 402 are connected to external devices, such as the blade part of an electric shaver, through the first shaft 405 and the second shaft 408.

[0064] A fourth positioning block 119 is provided in the middle of the first mounting groove 117. The second mounting part 406 is configured as a left mounting part 409 and a right mounting part 410. The left mounting part 409 is connected to the right mounting part 410 through the second base 407. The left mounting part 409, the second base 407 and the right mounting part 410 form a U-shaped structure to open a clearance groove 411 on the second base 407. The left mounting part 409 and the right mounting part 410 are respectively located on both sides of the fourth positioning block 119 and are engaged with the first mounting groove 117. The first base 404 passes through the clearance groove 411 and is arranged crosswise with the second base 407. When the first movable part 110 moves, it drives the second movable body 402 to move in the same direction. The second shaft 408 is used to connect external equipment to drive the external equipment to move. Understandably, the cross-connection of the first movable body 401 and the second movable body 402 can improve the overall compactness of the linear motor 100, and when connecting the cutter head, it can make the two cutter heads closer together, so that no large gap will be generated after long-term use, thus ensuring the efficiency of cutting hair.

[0065] Please refer to Figures 1-10 In a further embodiment, the movable body assembly 4 further includes a third movable body 412, which includes a third base 413 and a third shaft 414. The third shaft 414 is disposed at one end of the third base 413. The third base 413 has a mounting hole 415 that penetrates the third base 413 in the vertical direction at the other end opposite to the third shaft 414. The inner wall of the mounting hole 415 is provided with a third groove 416 and a limiting block 417. The limiting block 417 protrudes relative to the inner wall of the mounting hole 415 and is inclined from the bottom surface of the mounting hole 415 to the upper surface. The second base 407 of the second movable body 402 is provided with a third positioning block 418 corresponding to the third groove 416, and a positioning plate 419 disposed on the upper part of the second base 407. The third positioning block 418 is disposed on the side of the positioning plate 419.

[0066] The third movable body 412 is sleeved onto the second base 407 of the second movable body 402 through the mounting hole 415. When the third movable body 412 is sleeved into the second base 407 from top to bottom, the third groove 416 is engaged with the third positioning block 418. The positioning plate 419 moves along the limiting block 417 and passes through the limiting block 417, so that the positioning plate 419 is engaged above the limiting block 417. Understandably, the limiting block 417 mentioned here is inclined from the bottom surface of the mounting hole 415 to the top surface, meaning that the limiting block 417 is in the shape of an inverted triangle. When the third movable body 412 is inserted from above the second movable body 402, the positioning plate 419 first contacts the bottom of the limiting block 417. The positioning plate 419 is gradually squeezed along the inclined surface of the limiting block 417, and after a certain deformation, it passes through the limiting block 417. At this time, the positioning plate 419 will be locked onto the limiting block 417, thereby fixing the second movable body 402 and the third movable body 412. This arrangement allows for the connection of multiple blades, thereby improving the efficiency of hair cutting. Moreover, the integration of the third movable body 412 onto the second movable body 402 makes the linear motor 100 more compact, which helps to achieve the miniaturization of the linear motor 100.

[0067] Please refer to Figures 1-10 In this embodiment, the bottom of the first mounting groove 117 and the second mounting groove 118 are provided with a first connecting hole 120 that penetrates in the vertical direction, the first mounting part 403 and the second mounting part 406 are provided with a second connecting hole 420 corresponding to the first connecting hole 120, and the first magnetic yoke 302 and the second magnetic yoke 304 are provided with a third connecting hole 306 corresponding to the first connecting hole 120.

[0068] The linear motor 100 also includes a first connecting bolt 121, which passes through a second connecting hole 420, a first connecting hole 120, and a third connecting hole 306 in sequence to fix the second movable body 402, the first magnetic yoke 302, and the first permanent magnet 301. The first movable body 401 is fixedly connected to the second magnetic yoke 304 and the second permanent magnet 303. When the electromagnetic component 2 is energized, the magnetic field of the electromagnetic component 2 controls the movement of the first permanent magnet 301 and the second permanent magnet 303, thereby driving the first movable part 110, the second movable body 402, the second movable part 111, and the first movable body 401 to move. Understandably, the first connecting bolt 121 fixes the first movable part 110, the second movable body 402, and the first magnetic yoke 302 together, and the first connecting bolt 121 fixes the second movable part 111, the first movable body 401, and the second magnetic yoke 304 together. The first permanent magnet 301 and the first magnetic yoke 302, the second permanent magnet 303 and the second magnetic yoke 304 are also fixedly connected. This ensures the synchronicity and stability of the movement between the first permanent magnet 301 and the second movable body 402, and between the second permanent magnet 303 and the first movable body 401 when the linear motor 100 is in use.

[0069] Please refer to Figures 1-10 In this embodiment, the elastic component 103 includes elastic plate components 122 respectively disposed at both ends of the housing 1. The upper end of the elastic plate component 122 is connected and fixed to the movable part 101, and the lower end of the elastic plate component 122 is connected and fixed to the base 102. The elastic plate component 122 connects the movable part 101 and the base 102 to provide the movable part 101 and the base 102 with reset capability and stability, and to prevent the movable part 101 from moving excessively.

[0070] The upper end of the elastic plate assembly 122 is provided with a first elastic part 123 and a second elastic part 124. The first elastic part 123 is fixedly connected to the first movable part 110, and the second elastic part 124 is fixedly connected to the second movable part 111. It is used to limit the movement stroke of the first movable part 110 and the second movable part 111 and to reset the first movable part 110 and the second movable part 111. It can be understood that the elastic plate assembly 122 is fixedly connected to the first movable part 110 and the second movable part 111 respectively, so that the first movable part 110 and the second movable part 111 do not interfere with each other during movement, while the lower end is connected to the base 102 as a whole to improve the torsional resistance of the base 102.

[0071] The elastic plate assembly 122 includes vertically arranged elastic plates 125, with at least two elastic plates 125, forming an elastic cavity 126 between adjacent elastic plates 125. It is understood that by providing at least two elastic plates 125, an elastic cavity 126 is formed between them, thereby strengthening the elastic plate assembly 122 and maintaining good restoring capability even after prolonged use.

[0072] Please refer to Figures 1-10 In this embodiment, the elastic component 103 further includes connecting springs 127 respectively disposed on the outer side of the elastic plate assembly 122. The first end of the connecting spring 127 is fixedly connected to the first elastic portion 123, and the second end of the connecting spring 127 is fixedly connected to the second elastic portion 124. A downwardly extending connecting portion 128 is formed between the first end and the second end of the connecting spring 127. The connecting spring 127 is used to limit the movement stroke of the first movable portion 110 and the second movable portion 111 and to reset the first movable portion 110 and the second movable portion 111. It can be understood that the connecting spring 127 connects the first elastic portion 123 and the second elastic portion 124 on the same side. The connecting spring 127 and the elastic portion assembly are integrally formed with the housing 1, thus the connecting spring 127 and the elastic plate assembly 122 have good connection strength.

[0073] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0074] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A linear motor, characterized in that, Includes housing, electromagnetic components, permanent magnet components, and movable body components; The housing includes two movable parts disposed on the upper part of the housing and a base disposed on the lower part of the housing. The housing also includes an elastic component, and the two movable parts are fixedly connected to the base through the elastic component and are integrally formed. A receiving cavity is provided between the movable part and the base. Two permanent magnet components are provided and fixedly connected to the bottom of the two movable parts respectively. Two movable body components are provided and fixedly connected to the top of the two movable parts respectively. The electromagnetic component is provided in the receiving cavity. The permanent magnet component faces the electromagnetic component and has a gap between it and the electromagnetic component. The cavity contains two opposite sides with second grooves extending along the thickness direction of the motor. The electromagnetic component has a second positioning block corresponding to the second groove. When the electromagnetic component is installed into the cavity from the side of the housing, the second positioning block engages along the second groove to position the electromagnetic component.

2. The linear motor as described in claim 1, characterized in that, The receiving cavity penetrates the housing in the thickness direction of the linear motor. The receiving cavity includes a first end and a second end. The first end is open, and a first limiting part is provided at the lower part of the second end. During installation, the electromagnetic component enters the receiving cavity from the first end and is positioned by the first limiting part of the second end. Both the first end and the second end of the receiving cavity are provided with outwardly extending first connecting portions for connecting the linear motor to external devices.

3. The linear motor as described in claim 2, characterized in that, The first connecting portions are respectively disposed on the opposite sides of the first end and the opposite sides of the second end. The first connecting portions are integrally formed with the base and are located on the outside of the electromagnetic component. The movable part includes a first movable part and a second movable part, which can reciprocate along the length direction of the linear motor; when the linear motor is started, the first movable part and the second movable part move in opposite directions along the length direction of the linear motor, and the first connecting part is connected to an external device to fix the base relative to the first movable part and the second movable part.

4. The linear motor as described in claim 3, characterized in that, The receiving cavity includes a first cavity disposed in the movable part and a second cavity disposed in the base. The permanent magnet assembly is connected in the first cavity, and the electromagnetic assembly is connected in the second cavity. The first cavity includes a first mounting cavity in the first movable part and a second mounting cavity in the second movable part. The permanent magnet assembly includes a first permanent magnet and a first yoke disposed in the first mounting cavity, and a second permanent magnet and a second yoke disposed in the second mounting cavity. The first permanent magnet is fixedly connected to the first yoke and disposed below the first yoke, and the second permanent magnet is fixedly connected to the second yoke and disposed below the second yoke. The first permanent magnet and the second permanent magnet are arranged facing the electromagnetic assembly. When the electromagnetic assembly is energized, the magnetic field of the electromagnetic assembly controls the first permanent magnet and the second permanent magnet to move in the length direction of the linear motor, thereby driving the first movable part and the second movable part to move.

5. The linear motor as described in claim 4, characterized in that, The first mounting cavity and the second mounting cavity are each provided with at least one first positioning block in the vertical or horizontal direction. The first positioning block protrudes inward relative to the inner wall surface of the first mounting cavity and the second mounting cavity. The first magnetic yoke and the second magnetic yoke are provided with a first groove corresponding to the first positioning block. When the permanent magnet assembly is installed into the first cavity, the first positioning block of the first mounting cavity and the second mounting cavity cooperate with the first groove of the first magnetic yoke and the second magnetic yoke to position the permanent magnet assembly. The second cavity has a second groove extending through the thickness direction of the linear motor on both opposite sides. The electromagnetic component has a second positioning block corresponding to the second groove. When the electromagnetic component is installed in the second cavity, the second positioning block enters the second cavity along the second groove to position the electromagnetic component.

6. The linear motor as described in claim 4, characterized in that, The upper surface of the first movable part is provided with a first mounting groove that extends downward and is recessed, and the upper surface of the second movable part is provided with a second mounting groove that extends downward and is recessed. The movable body assembly includes a first movable body and a second movable body. The first movable body includes a first mounting part, a first base, and a first shaft. The first shaft, the first base, and the first mounting part are connected and fixed in sequence from top to bottom. The first base corresponds to the second mounting groove and is engaged in the second mounting groove. When the second movable part moves, it drives the first movable body to move in the same direction. The first shaft is used to connect to external devices to drive the external devices to move. The second movable body includes a second mounting part, a second base and a second shaft. The second shaft, the second base and the second mounting part are connected and fixed from top to bottom. The second base corresponds to the first mounting groove and is engaged in the first mounting groove. A fourth positioning block is provided in the middle of the first mounting slot. The second mounting part is configured as a left mounting part and a right mounting part. The left mounting part is connected to the right mounting part through the second base. The left mounting part, the second base and the right mounting part form a U-shaped structure to open a clearance groove on the second base. The left mounting part and the right mounting part are respectively located on both sides of the fourth positioning block and are engaged with the first mounting slot. The first base passes through the clearance groove and is arranged crosswise with the second base. When the first movable part moves, it drives the second movable body to move in the same direction. The second shaft is used to connect external equipment to drive the external equipment to move.

7. The linear motor as described in claim 6, characterized in that, The movable body assembly also includes a third movable body, which includes a third base and a third shaft. The third shaft is disposed at one end of the third base. The third base has a mounting hole that penetrates the third base in the vertical direction at the opposite end of the third shaft. The inner wall of the mounting hole is provided with a third groove and a limiting block. The limiting block protrudes relative to the inner wall of the mounting hole and is inclined from the bottom surface of the mounting hole to the upper surface. The second movable body has a third positioning block corresponding to the third groove on its second base, and a positioning plate on the upper part of the second base, wherein the third positioning block is disposed on the side of the positioning plate; The third movable body is sleeved on the second base of the second movable body through the mounting hole. When the third movable body is sleeved into the second base from top to bottom, the third groove is engaged with the third positioning block. The positioning plate moves along the limiting block and passes through the limiting block, so that the positioning plate is locked above the limiting block.

8. The linear motor as described in claim 6, characterized in that, The bottom of the first mounting groove and the second mounting groove are provided with a first connecting hole that penetrates in the vertical direction, the first mounting part and the second mounting part are provided with a second connecting hole corresponding to the first connecting hole, and the first magnetic yoke and the second magnetic yoke are provided with a third connecting hole corresponding to the first connecting hole. The linear motor further includes a first connecting bolt, which passes sequentially through the second connecting hole, the first connecting hole, and the third connecting hole to fix the second movable body, the first magnetic yoke, and the first permanent magnet. The first movable body is fixedly connected to the second magnetic yoke and the second permanent magnet. When the electromagnetic component is energized, the magnetic field of the electromagnetic component controls the movement of the first permanent magnet and the second permanent magnet, thereby driving the first movable part and the second movable body, and the second movable part and the first movable body to move.

9. The linear motor as described in claim 3, characterized in that, The elastic component includes elastic plate assemblies respectively disposed at both ends of the housing. The upper end of the elastic plate assembly is connected and fixed to the movable part, and the lower end of the elastic plate assembly is connected and fixed to the base. The upper end of the elastic plate assembly is provided with a first elastic part and a second elastic part. The first elastic part is fixedly connected to the first movable part, and the second elastic part is fixedly connected to the second movable part, which is used to limit the movement stroke of the first movable part and the second movable part and to reset the first movable part and the second movable part. The elastic plate assembly includes vertically arranged elastic plates, and at least two elastic plates are provided, with an elastic cavity formed between two adjacent elastic plates.

10. The linear motor as claimed in claim 9, characterized in that, The elastic component further includes connecting springs respectively disposed on the outer side of the elastic plate assembly. The first end of the connecting spring is fixedly connected to the first elastic part, and the second end of the connecting spring is fixedly connected to the second elastic part. A downwardly extending connecting part is formed between the first end and the second end of the connecting spring. The connecting spring is used to limit the movement stroke of the first movable part and the second movable part and to reset the first movable part and the second movable part.

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