A vibration motor
By setting the coil on the outer surface of the stator assembly in the motor and replacing the traditional bearings with swing iron core and elastic parts, the problems of complex motor structure and short service life are solved, and brushlessness and extended service life are achieved.
Patent Information
- Application Number
- CN202210139743.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-02-15
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2042-02-15
AI Technical Summary
The existing motors have complex structures and short service life, mainly due to wear due to mechanical contact between the rotor and the bearing.
A vibration motor is designed to achieve brushlessness and bearing replacement by setting the coil of the rotor assembly on the outer surface of the stator assembly, and matching the swinging core and elastic parts within the stator assembly.
The structure simplification of the motor, the cost reduction and the service life are achieved, while avoiding the use of conductive slides, reducing wear and improving torque density.
Smart Images
Figure CN114629290B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of motors, and in particular to a vibration motor. Background Art
[0002] Motors are used in various fields as power sources. Motors in the prior art generally use an excitation current to pass through a rotor coil, and then use a conductive slider to introduce the excitation current to the rotor, so that the rotor generates magnetism and attracts two pairs of permanent magnets arranged on the inner wall of the stator casing, thereby making the rotor reciprocate. The two ends of the rotor require support points. Therefore, in order to reduce the impact on the reciprocating rotation of the rotor, bearings are provided at both ends of the rotor. However, due to the mechanical contact between the rotor and the bearings, the bearings are easily worn due to long-term vibration and friction. Therefore, the solution of passing current through the rotor to generate reciprocating vibration and cooperating with the bearings is not only complex in structure, but also reduces the service life of the motor. Summary of the invention
[0003] The main purpose of the present invention is to provide a vibration motor, aiming to solve the problems of complex structure and short service life of existing motors.
[0004] To achieve the above object, the vibration motor proposed by the present invention comprises:
[0005] case;
[0006] A stator assembly is disposed in the housing;
[0007] A rotor assembly is arranged in the housing; the rotor assembly comprises a coil, a swinging iron core and a rotating shaft; the coil is arranged on the outer surface of the stator assembly, and the swinging iron core is arranged in the stator assembly; one end of the rotating shaft is connected to the swinging iron core, and the swinging iron core is used to drive the rotating shaft to rotate; the other end of the rotating shaft extends out of the housing; the rotating shaft is rotatably connected to the housing; the swinging iron core is inserted into the stator assembly;
[0008] A magnetic component is arranged in the housing; the magnetic component comprises at least two magnetic members with opposite magnetic poles; the magnetic component is inserted into the stator component; the magnetic component is located on one side of the rotor component;
[0009] An elastic member passes through the swing core, and two ends of the elastic member are respectively connected to the shell.
[0010] Preferably, the stator assembly includes a bracket and a stator core, a cavity is provided in the bracket, the swing core, the magnetic assembly and the elastic member are all located in the cavity; the stator core and the magnetic assembly are arranged on the inner wall of the cavity; the coil is wound on the outer surface of the bracket.
[0011] Preferably, the magnetic assembly includes a first permanent magnet, a second permanent magnet and a magnetic isolation member, and the magnetic isolation member is located between the first permanent magnet and the second permanent magnet; the first permanent magnet, the second permanent magnet and one side of the magnetic isolation member are all connected to the stator core, and the stator core is connected to the inner wall of the cavity; the swing core corresponds to the position of the magnetic isolation member.
[0012] Preferably, the swing core comprises a connecting portion and a protruding portion, wherein the connecting portion is passed through the rotating shaft; one end of the protruding portion is connected to one side of the connecting portion, and the other end is located at one side of the magnetic component.
[0013] Preferably, the cavity includes an installation cavity and an active cavity which are interconnected, the connecting portion is located in the installation cavity, and the protruding portion is located in the active cavity; a first gap is provided between the inner wall of the installation cavity and the connecting portion, and when the swing core rotates, the protruding portion swings in the active cavity.
[0014] Preferably, the rotating shaft includes an output portion and a bending portion, the bending portion is located in the shell, and the output portion extends out of the shell; the bending portion passes through the swing iron core; the elastic member is arranged in the bending portion, and both ends pass through the bending portion and are respectively connected to the inner walls of both ends of the shell.
[0015] Preferably, the shell includes a casing, a first end cover and a second end cover, the two ends of the casing are respectively connected to the first end cover and the second end cover; one end of the rotating shaft passes through the first end cover; the two ends of the elastic member are respectively connected to the first end cover and the second end cover.
[0016] Preferably, a through hole is provided on the first end cover, one end of the rotating shaft passes through the through hole and out of the housing, and a second gap is provided between the through hole and the rotating shaft.
[0017] Preferably, the first end cover and the second end cover are both provided with a fixing structure, and both ends of the elastic member are detachably connected to the fixing structure of the first end cover and the fixing structure of the second end cover respectively.
[0018] Preferably, the elastic member is in the shape of a strip, and connecting holes are provided at both ends of the elastic member, and the elastic member is threadedly connected to the fixing structure through the connecting holes.
[0019] The technical solution of the present invention is to set the coil of the rotor assembly on the outer surface of the stator assembly, and cooperate with the swinging iron core arranged in the stator assembly. When alternating current is passed through the coil, it cooperates with the swinging iron core and generates a changing magnetic field. The rotor assembly attracts the magnetic assembly, causing the swinging iron core to reciprocate, while driving the rotating shaft connected to the swinging iron core to rotate and form a vibration output; the swinging iron core is connected to the shell through an elastic member, and when a positive current is passed through the coil, the coil and the swinging iron core are combined to form an electromagnet and generate an electromagnetic field; the electromagnetic field formed at this time drives the swinging iron core to swing; the swinging iron core is subjected to the magnetic field force, and the elastic member is deformed, and finally the magnetic field force drives the swinging iron core to swing to the side of the magnetic member that is magnetically attracted to it; after the force is removed, the elastic member rebounds and returns to its initial state, while driving the swinging iron core to return to its original state. state; similarly, when a reverse current is passed through the coil, an electromagnetic field opposite to that when a forward current is passed through is formed, and the swinging iron core is driven to swing and swing toward the side of the magnetic part that is magnetically attracted; therefore, when an alternating current is passed through the coil, the swinging iron core can swing back and forth between the two magnetic parts with opposite magnetic poles, and then the rotating shaft outputs vibration through the other end under high-speed swinging; the coil arranged outside the stator assembly needs to be connected to an alternating current, while the swinging iron core arranged inside the stator assembly does not need to be connected to an alternating current, so there is no need to use a conductive sliding plate (brush), thereby realizing the brushless permanent magnet vibration motor; because the conductive sliding plate part is omitted, the structure is simpler and the cost is reduced at the same time; the bearing in the prior art is replaced by an elastic member, and the functions of limiting, returning to zero and supporting can be realized, thereby reducing the wear caused by the reciprocating swing of the swinging iron core and increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0021] Figure 1 FIG. 1 is a schematic structural diagram of a vibration motor according to an embodiment of the present invention.
[0022] Figure 2 FIG. 1 is a schematic structural diagram of another perspective of an embodiment of a vibration motor of the present invention.
[0023] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of AA.
[0024] Figure 4 FIG. 4 is a schematic diagram of the internal structure of a vibration motor according to an embodiment of the present invention.
[0025] Figure 5 FIG. 1 is an exploded view of an embodiment of a vibration motor of the present invention.
[0026] Description of Figure Numbers:
[0027]
[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0032] The invention provides a vibration motor.
[0033] Reference Figures 1 to 5In one embodiment of the present invention, the vibration motor includes a housing 1, a stator assembly 2, a rotor assembly 3, a magnetic assembly 4 and an elastic member 5; the stator assembly 2 is arranged in the housing 1; the rotor assembly 3 is arranged in the housing 1; the rotor assembly 3 includes a coil 21, a swing core 31 and a rotating shaft 32; the coil 21 is arranged on the outer surface of the stator assembly 2, and the swing core 31 is arranged in the stator assembly 2; one end of the rotating shaft 32 is connected to the swing core 31, and the swing core 31 is used to drive the rotating shaft 32 to rotate; the other end of the rotating shaft 32 extends out of the housing 1, and the rotating shaft 32 is rotatably connected to the housing 1; the swing core 31 is inserted into the stator assembly 2; the magnetic assembly 4 is arranged in the housing 1; the magnetic assembly 4 includes at least two magnetic members with opposite magnetic poles; the magnetic assembly 4 is inserted into the stator assembly 2, and the elastic assembly is located on one side of the rotor assembly 3; the elastic member 5 passes through the rotor assembly 3, and both ends are respectively connected to the housing 1.
[0034] In the above structure, the coil of the rotor assembly 3 is arranged on the outer surface of the stator assembly 2, and cooperates with the swing core 31 arranged in the stator assembly 2. When alternating current is passed through the coil, it cooperates with the swing core 31 and generates a changing magnetic field. The swing core 31 is attracted by the magnetic assembly 4, so that the swing core 31 produces reciprocating rotation, and at the same time drives the rotating shaft 32 connected to the swing core 31 to rotate, and forms a vibration output; the swing core 31 is connected to the shell 1 through the elastic member 5. When the coil is passed through a positive current, the coil and the swing core 31 are combined to form an electromagnet and generate an electromagnetic field; the electromagnetic field formed at this time drives the swing core 31 to swing; the swing core 31 is subjected to the magnetic field force, and the elastic member 5 is deformed, and finally the magnetic field force brings The swing core 31 swings toward the side of the magnetic part that is magnetically attracted to it; after the force is removed, the elastic part 5 rebounds and returns to the initial state, and at the same time drives the swing core 31 to return to the original state; similarly, when the coil is supplied with a reverse current, an electromagnetic field opposite to that when the forward current is supplied is formed, and the swing core 31 is driven to swing and swing toward the side of the magnetic part that is magnetically attracted to it; therefore, when an alternating current is supplied to the coil, the swing core can swing back and forth between the two magnetic parts with opposite magnetic poles, and then the rotating shaft 32 outputs vibration through the other end under high-speed swinging; the coil arranged on the outer surface of the stator assembly 2 needs to be connected to the alternating current, while the swing core 31 arranged inside the stator assembly 2 does not need to be connected to the alternating current, so there is no need to use a conductive sliding plate (brush), and the brushless permanent magnet vibration motor is realized; because the conductive sliding plate part is omitted, the structure is simpler and the cost is reduced; the elastic part 5 is used to replace the bearing in the prior art, and the functions of limiting, returning to zero and supporting can be realized, thereby reducing the wear generated when the swing core 31 swings back and forth, and increasing the service life.
[0035] It should be noted that, because the conductive sliding part is omitted, the structure is simpler; the cost is reduced, the internal space utilization of the motor is improved, and the torque density of the motor is increased; the motor can be designed to be smaller in overall volume under the condition of equal output capacity; at the same time, the structure of the rotor assembly 3 is simple, and no bearing is required during rotation; the elastic member 5 is used to replace the bearing in the prior art, and the functions of limiting, returning to zero and supporting can be achieved; when one end of the shaft connected to the swing core 31 is driven to swing back and forth, the change cycle of the alternating current is short, so that the shaft 32 can swing at high speed, and the other end of the shaft 32 vibrates when it swings highly, and the vibration output frequency of the shaft 32 is synchronized with the frequency of the input current, and the vibration swing amplitude is affected by the load on the output shaft. Generally, the greater the load, the smaller the output vibration swing amplitude; only one set of coils is needed in the motor, which simplifies the assembly process.
[0036] Preferably, the stator assembly 2 also includes a stator core 21 and a bracket 22, a cavity 221 is arranged in the bracket 22, the swing core 31, the stator core 22, the magnetic assembly 4 and the elastic member 5 are all located in the cavity 221; the stator core 21 and the magnetic assembly 4 are arranged on the inner wall of the cavity 221; the coil 21 is wound around the outer surface of the bracket 22.
[0037] In the above structure, the coil 21 is easy to deform and is wound on the outer surface of the bracket 22; the bracket 22 has the function of supporting the coil 21; at the same time, a cavity 221 is provided in the bracket 22 for setting the stator core 21. The stator core 21, the magnetic component 4 and the elastic member 5 are not only convenient for installation, but also increase the structural stability inside the motor; when the coil 21 wound on the outer surface of the bracket 22 is energized by current, it is combined with the electronic core set in the cavity 221 to generate an electromagnetic field, and the electromagnetic field drives the swing core 31 to swing back and forth in the cavity 221.
[0038] Preferably, a cavity cover 222 is provided on one side of the bracket 22 , and the cavity 221 is detachably connected to the bracket 22 , so as to facilitate installation of the stator core 21 , the magnetic component 4 and the elastic member 5 into the cavity 221 .
[0039] Preferably, the magnetic component 4 includes a first permanent magnet 41, a second permanent magnet 42 and a magnetic isolation member 43, and the magnetic isolation member 43 is located between the first permanent magnet 41 and the second permanent magnet 42; one side of the first permanent magnet 41, the second permanent magnet 42 and the magnetic isolation member 43 are connected to the stator core 21, and the stator core 21 is connected to the inner wall of the cavity 221; the swing core 31 corresponds to the position of the magnetic isolation member 43.
[0040] In the above structure, the swing core 31 is located in the cavity 221 of the bracket 22, and can be naturally located between the first permanent magnet 41 and the second permanent magnet 42 when no power is supplied; when a positive current is supplied to the coil 21, the electromagnetic field formed by the combination of the coil 21 and the stator core 21 drives the swing core 31 to swing; the swing core 31 is subjected to the magnetic field force, and the elastic member 5 is deformed, and finally the magnetic field force drives the rotor assembly 3 to swing toward the first permanent magnet 41; similarly, when a reverse current is supplied to the coil 21 of the stator assembly 2, an electromagnetic field opposite to that when a forward current is supplied is formed, and the swing core 31 is driven to swing toward the second permanent magnet 42; therefore, when alternating current is supplied to the stator assembly 2, the rotor assembly 3 can swing back and forth between the first permanent magnet 41 and the second permanent magnet 42, and then output vibration through the rotating shaft 32. It should be noted that the function of the magnetic isolation member 43 is to reduce the influence of the magnetic field between the first permanent magnet 41 and the second permanent magnet 42, and at the same time, to allow a certain distance between the first permanent magnet 41 and the second permanent magnet 42 so that the swing core 31 has a swinging amplitude; therefore, the magnetic isolation member 43 can be made of high magnetic permeability material into an ordinary boss structure or other structure used for separation; the magnetic isolation member can be made of soft magnetic material sintered at a constant high temperature, with high magnetic permeability and low magnetic loss factor; it utilizes the electron scattering caused by the thermal motion of the electric field of the functional component lattice and the interaction between electrons to absorb electromagnetic wave energy and convert it into heat energy, thereby achieving the purpose of attenuating electromagnetic waves.
[0041] Preferably, the swing core 31 includes a connecting portion 311 and a protruding portion 312, wherein the connecting portion 311 is inserted into the rotating shaft 32; one end of the protruding portion 312 is connected to one side of the connecting portion 311, and the other end is located at one side of the magnetic component 4. In the above structure, the connecting portion 311 is connected to both ends of the housing 1 through the elastic member 5, and is erected inside the cavity 221; when the swing core 31 is subjected to a magnetic field force, the elastic member 5 is deformed, and finally the magnetic field force drives the swing core 31 to rotate, and at this time, the protruding portion 312 swings toward the first permanent magnet 41 or the second permanent magnet 42.
[0042] Preferably, the cavity 221 includes an installation cavity 2211 and an active cavity 2212 which are interconnected, the connecting portion 311 is located in the installation cavity 2211, and the protrusion 312 is located in the active cavity 2212; a first gap is provided between the inner wall of the installation cavity 2211 and the connecting portion 311, and when the swing core 31 rotates, the protrusion 312 swings in the active cavity 2212.
[0043] In the above structure, the cross-section of the installation cavity 2211 is the same as the cross-section shape of the connecting part 311. At the same time, a first gap is arranged between the inner wall of the installation cavity 2211 and the connecting part 311, which can avoid friction caused by contact between the installation cavity 2211 and the connecting part 311, reduce the loss of energy conversion, and reduce the probability of wear of the swing core 31.
[0044] Preferably, the rotating shaft 32 includes an output portion 321 and a bending portion 322, the bending portion 322 is located in the shell 1, and the output portion 321 extends out of the shell 1; the bending portion 322 passes through the swing core 31; the elastic member 5 is arranged in the bending portion 322, and both ends pass through the bending portion 322 and are respectively connected to the inner walls of the two ends of the shell 1.
[0045] In the above structure, the bending angle of the bending portion 322 is 90°, so that the elastic member 5 can pass through the two ends of the bending portion 322 and be connected to the shell 1, so that the rotating shaft 32 and the rotor assembly 3 are supported in the cavity 221; the output portion 321 is made of metal material, so that the strength of the motor can be guaranteed when the motor vibrates and outputs, and the bending portion 322 is made of plastic material to avoid increasing the weight and causing large losses in the energy conversion when the coil 21 is energized; the output portion 321 and the bending portion 322 are connected by snap-fit or glue; the bending portion 322 and the swing core 31 can be connected by using a keyway or interference fit.
[0046] Preferably, the housing 1 includes a casing 11, a first end cover 12 and a second end cover 13, and the two ends of the casing 11 are respectively connected to the first end cover 12 and the second end cover 13; one end of the rotating shaft 32 passes through the first end cover 12; and the two ends of the elastic member 5 are respectively connected to the first end cover 12 and the second end cover 13. In the above structure, the casing 1 is detachably connected to the first end cover 12 and the second end cover 13, so that the stator assembly 2, the rotor assembly 3, the magnetic assembly 4, the elastic member 5 and other components can be easily installed into the casing 11.
[0047] Preferably, a through hole 121 is provided on the first end cover 12, one end of the rotating shaft 32 passes through the housing 1 through the through hole 121, and a second gap is provided between the through hole 121 and the rotating shaft 32. In the above structure, the second gap is provided between the through hole 121 and the rotating shaft 32 to avoid friction between the end cover and the shaft when the shaft is driven to rotate and output vibration, thereby reducing the loss of energy conversion and the probability of shaft wear.
[0048] Preferably, the first end cover 12 and the second end cover 13 are both provided with a fixing structure 14, and the two ends of the elastic member 5 are detachably connected to the fixing structure 14 of the first end cover 12 and the fixing structure 14 of the second end cover 13. In the above structure, the fixing structure 14 is located on the side of the first end cover 12 or the second end cover 13 away from the housing 11, and is used to fix the end of the elastic member 5.
[0049] Preferably, the elastic member 5 is in the shape of a strip, and both ends of the elastic member 5 are provided with connection holes 51, and the elastic member 5 is threadedly connected to the fixing structure 14 through the connection holes 51. In the above structure, the elastic member 5 is arranged in the shape of a strip, and is easily deformed after being subjected to force. After the force is removed, the elastic member 5 rebounds and returns to the initial state. It should be noted that the elastic member 5 and the first end cover 12 or the second end cover 13 can also be connected by gluing, interference fit, etc.
[0050] The technical solution of the present invention is to set the coil of the rotor component 3 on the outer surface of the stator component 2, and cooperate with the swing core 31 set in the stator component 2. When the coil is powered by alternating current, it cooperates with the swing core 31 and generates a changing magnetic field. The swing core 31 is attracted by the magnetic component 4, so that the swing core 31 reciprocates, and at the same time drives the rotating shaft 32 connected to the swing core 31 to rotate, and forms a vibration output; the swing core 31 is connected to the shell 1 through the elastic member 5. When the coil is powered by a positive current, the coil and the swing core 31 are combined to form an electromagnet and generate an electromagnetic field; the electromagnetic field formed at this time drives the swing core 31 to swing; the swing core 31 is subjected to the magnetic field force, and the elastic member 5 is deformed, and finally the magnetic field force The swing core 31 is driven to swing toward the side of the magnetic part that is magnetically attracted to it; after the force is removed, the elastic part 5 rebounds and returns to its initial state, and at the same time drives the swing core 31 to return to its original state; similarly, when the coil is supplied with a reverse current, an electromagnetic field opposite to that when the forward current is supplied is formed, and the swing core 31 is driven to swing and swing toward the side of the magnetic part that is magnetically attracted to it; therefore, when alternating current is supplied to the coil, the swing core can swing back and forth between the two magnetic parts with opposite magnetic poles, and then the rotating shaft 32 outputs vibration through the other end under high-speed swinging; the coil arranged on the outer surface of the stator assembly 2 needs to be connected to alternating current, while the swing core 31 arranged inside the stator assembly 2 does not need to be connected to alternating current, so there is no need to use a conductive sliding plate (brush) , realizing the brushless permanent magnet vibration motor; because the conductive sliding part is omitted, the structure is simpler and the cost is reduced; the elastic part 5 is used to replace the bearing in the prior art, and the functions of limiting, returning to zero and supporting can be realized, reducing the wear caused by the reciprocating swing of the swing core 31, and increasing the service life of the stator core 21 stator core 21.
[0051] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A vibration motor, characterized in that: include: case; A stator assembly is disposed in the housing; A rotor assembly is arranged in the housing; the rotor assembly comprises a coil, a swinging iron core and a rotating shaft; the coil is arranged on the outer surface of the stator assembly, and the swinging iron core is arranged in the stator assembly; one end of the rotating shaft is connected to the swinging iron core, and the swinging iron core is used to drive the rotating shaft to rotate; the other end of the rotating shaft extends out of the housing, and the rotating shaft is rotatably connected to the housing; the swinging iron core is inserted into the stator assembly; A magnetic component is arranged in the housing; the magnetic component comprises at least two magnetic members with opposite magnetic poles; the magnetic component is inserted into the stator component; the magnetic component is located on one side of the rotor component; An elastic member passes through the swing core, and two ends of the elastic member are respectively connected to the housing; The rotating shaft comprises an output portion and a bending portion, wherein the bending portion is located in the housing and extends out of the housing; the bending portion passes through the swing core; the elastic member is arranged in the bending portion, and both ends pass through the bending portion and are respectively connected to the inner walls of both ends of the housing; the output portion is made of metal material, and the bending portion is made of plastic material; The shell includes a casing, a first end cover and a second end cover, and the two ends of the casing are respectively connected to the first end cover and the second end cover; one end of the rotating shaft passes through the first end cover; the two ends of the elastic member are respectively connected to the first end cover and the second end cover; a through hole is provided on the first end cover, and one end of the rotating shaft passes through the casing through the through hole, and a second gap is provided between the through hole and the rotating shaft.
2. The vibration motor according to claim 1, wherein: The stator assembly includes a bracket and a stator core. A cavity is arranged in the bracket. The swing core, the magnetic assembly and the elastic member are all located in the cavity. The stator core and the magnetic assembly are arranged on the inner wall of the cavity. The coil is wound around the outer surface of the bracket.
3. The vibration motor according to claim 2, characterized in that The magnetic assembly includes a first permanent magnet, a second permanent magnet and a magnetic isolation member, wherein the magnetic isolation member is located between the first permanent magnet and the second permanent magnet; the first permanent magnet, the second permanent magnet and one side of the magnetic isolation member are all connected to the stator core, and the stator core is connected to the inner wall of the cavity; the swing core corresponds to the position of the magnetic isolation member.
4. The vibration motor according to claim 3, characterized in that The swing core comprises a connecting portion and a protruding portion, wherein the connecting portion is passed through the rotating shaft; one end of the protruding portion is connected to one side of the connecting portion, and the other end is located at one side of the magnetic component.
5. The vibration motor according to claim 4, characterized in that The cavity includes an installation cavity and an active cavity which are interconnected, the connecting portion is located in the installation cavity, and the protruding portion is located in the active cavity; a first gap is provided between the inner wall of the installation cavity and the connecting portion, and when the swing core rotates, the protruding portion swings in the active cavity.
6. The vibration motor according to claim 1, wherein: The first end cover and the second end cover are both provided with a fixing structure, and the two ends of the elastic member are detachably connected to the fixing structure of the first end cover and the fixing structure of the second end cover respectively.
7. The vibration motor according to claim 6, characterized in that The elastic member is in the shape of a strip, and connecting holes are provided at both ends of the elastic member. The elastic member is threadedly connected to the fixing structure through the connecting holes.
Citation Information
Patent Citations
High -frequency vibration device and adoption device's electric toothbrush
CN208723758U