Magnetic levitation vibration motor

Abstract

The present invention relates to a magnetic levitation vibration motor comprising: a housing assembly including a first cylindrical body having a housing section formed therein and a sleeve fitted to the outside of the first cylindrical body; a vibrator assembly including a magnet, a counterweight located on one side of the magnet, a second cylindrical body having a housing chamber formed therein and a stopper that restricts the counterweight and magnet to the housing chamber; an electromagnetic coil located between the sleeve and the first cylindrical body; and a positioning structure located on the inner wall of the first cylindrical body and / or the outer wall of the second cylindrical body, wherein the magnet generates a first magnetic field, and in its natural state, the magnet and the sleeve generate a magnetic attractive force due to the action of the first magnetic field, causing the second cylindrical body to levitate within the housing section, and the electromagnetic coil generates a changing second magnetic field, the direction in which the vibrator assembly moves toward the end cap is defined as the first direction, and the interaction between the first magnetic field and the second magnetic field causes the vibrator assembly to reciprocate within the housing section along the first direction.

Description

[Technical Field]

[0001] The present invention relates to the technical field of motors, and in particular to a magnetically levitated vibration motor. [Background Art]

[0002] In the prior art, for a linear vibration motor, the vibrator moves linearly, levitates and vibrates in a chamber inside the housing, so when the vibrator reciprocates, it is prone to friction and collision with the side wall. As a result, offset is prone to occur in the reciprocating linear motion of the vibrator of the vibration motor, and such offset of the vibrator is difficult to be accurately controlled in high-frequency electromagnetic vibration. When the vibrator collides with the housing, abnormal noise and wear are generated, which seriously affect the service life of the magnetically levitated vibration motor and user experience. Therefore, a method for reducing the offset of the vibrator without affecting the vibration frequency of the magnetically levitated vibration motor is an urgent technical problem to be solved. [Summary of the Invention] [Problem to be Solved by the Invention]

[0003] An object of the present invention is to provide a magnetically levitated vibration motor that reduces the offset of the vibrator without affecting the vibration frequency of the magnetically levitated vibration motor. [Means for Solving the Problem]

[0004] To solve the above-mentioned technical problems, the present invention provides a magnetic levitation vibration motor comprising: a housing assembly including a sleeve, a first cylindrical body and an end cap, wherein the end cap is engaged with one end of the first cylindrical body, the sleeve is fitted to the outside of the first cylindrical body and a housing portion is formed in the first cylindrical body; a vibrator assembly including a counterweight, a magnet, a second cylindrical body and a stopper, wherein the second cylindrical body has a housing chamber and a locking groove communicating with the housing chamber, the counterweight is located on one side of the magnet, the stopper restricts the counterweight and the magnet into the housing chamber, and one end of the stopper is engaged with the locking groove; an electromagnetic coil located between the sleeve and the first cylindrical body; and a positioning structure located on the inner wall of the first cylindrical body and / or the outer wall of the second cylindrical body so that the second cylindrical body slides with a gap between them within the housing portion, Herein, the present invention provides a magnetic levitation vibration motor in which, when the sleeve is made of a magnetic material, both the first cylindrical body and the second cylindrical body are made of a non-magnetic material, the magnet generates a first magnetic field, and in its natural state, the magnet and the sleeve generate a magnetic attraction force due to the action of the first magnetic field, causing the second cylindrical body to levitate within the housing, and the electromagnetic coil generates a changing second magnetic field, the direction toward the end cap of the vibrator assembly is defined as the first direction, and the interaction between the first magnetic field and the second magnetic field causes the vibrator assembly to reciprocate within the housing along the first direction.

[0005] Furthermore, the positioning structure includes a first guide pin, the first guide pin having the same longitudinal direction as the first direction, at least two of the first guide pins being connected to the inner wall of the first cylindrical body at intervals, and the sides of the first guide pins being in contact with the outer wall of the second cylindrical body such that the second cylindrical body vibrates back and forth along the first guide pins within the housing.

[0006] Furthermore, the first guide pin includes a first cylindrical surface that abuts against the outer wall of the second cylindrical body so as to be in tangential contact with the outer wall of the second cylindrical body.

[0007] Furthermore, the end cap includes an engagement groove that communicates with the housing portion, an engagement portion that fits into the engagement groove is provided at one end of the first cylindrical body, and a ventilation hole communicating with the housing portion is formed at the other end of the first cylindrical body that is away from the end cap.

[0008] Furthermore, counterweights are provided on each of the two sides of the magnet, and both counterweights are located within the housing chamber.

[0009] Furthermore, the positioning structure further includes a second guide pin, the second guide pin having the same longitudinal direction as the first direction, at least two of the second guide pins being connected at intervals to the outer wall of the second cylindrical body, and the sides of the second guide pins being in contact with the inner wall of the first cylindrical body such that the second cylindrical body vibrates back and forth along the second guide pins within the housing.

[0010] Furthermore, the second guide pin comprises a second cylindrical surface that abuts against the inner wall of the first cylindrical body such that the second guide pin and the inner wall of the first cylindrical body are in tangential contact, and arcuate surfaces that are smoothly connected to both sides of the second cylindrical surface.

[0011] Furthermore, the positioning structure further includes a third guide pin, the third guide pin having the same longitudinal direction as the first direction, at least two sets of the third guide pins being connected at intervals to the outer wall of the second cylindrical body, and the sides of the third guide pins being in contact with the inner wall of the first cylindrical body such that the second cylindrical body vibrates back and forth along the third guide pins within the housing.

[0012] Furthermore, each set of third guide pins includes two adjacent third guide pins, the adjacent third guide pins having a first sliding groove formed therein, and the first guide pins are in contact with the first sliding groove such that the second cylindrical body vibrates back and forth along the first sliding groove within the housing.

[0013] Furthermore, the positioning structure includes a fourth guide pin, the fourth guide pin having the same longitudinal direction as the first direction, at least two sets of the fourth guide pins being connected at intervals to the inner wall of the first cylindrical body, and the sides of the fourth guide pins being in contact with the outer wall of the second cylindrical body such that the second cylindrical body vibrates back and forth along the fourth guide pins in the housing.

[0014] Each set of the fourth guide pins includes two adjacent fourth guide pins, the adjacent fourth guide pins having a second sliding groove formed therein, and the second guide pins are in contact with the second sliding groove such that the second cylindrical body reciprocates along the second sliding groove within the housing. [Effects of the Invention]

[0015] The embodiments of the present invention provide the following beneficial effects.

[0016] In this embodiment, the magnetic levitation vibration motor generates a magnetic attraction force between the magnet and the sleeve due to the action of the first magnetic field, causing the second cylindrical body to levitate within the housing. A positioning structure allows the second cylindrical body to slide within the housing with a gap between it and the other members. When the electromagnetic coil generates a changing second magnetic field, the vibrator assembly vibrates back and forth within the housing along the first direction, thus resolving the problem in the prior art of difficulty in controlling the offset amount during high-frequency vibration of the vibrator. [Brief explanation of the drawing]

[0017] To more clearly illustrate embodiments of the present invention or technical solutions in the prior art, the following drawings necessary for describing the embodiments or prior art are briefly introduced. Clearly, the drawings described below are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these, without any creative work.

[0018] [Figure 1] This is a schematic diagram of a magnetic levitation vibration motor according to Embodiment 1 of the present invention. [Figure 2]It is a schematic exploded view of the magnetically levitated vibration motor according to Embodiment 1 of the present invention. [Figure 3] It is a schematic configuration diagram of the first cylindrical body according to Embodiment 1 of the present invention. [Figure 4] It is a partially enlarged view of section A in FIG. 3. [Figure 5] It is a schematic exploded view of the vibrator assembly according to Embodiment 1 of the present invention. [Figure 6] It is a schematic configuration diagram of the second cylindrical body according to Embodiment 1 of the present invention. [Figure 7] It is a schematic configuration diagram of the end cap according to Embodiment 1 of the present invention. [Figure 8] It is a schematic exploded view of the magnetically levitated vibration motor according to Embodiment 2 of the present invention. [Figure 9] It is a schematic configuration diagram of the second cylindrical body according to Embodiment 2 of the present invention. [Figure 10] It is a partially enlarged view of section B in FIG. 9. [Figure 11] It is a schematic exploded view of the magnetically levitated vibration motor according to Embodiment 3 of the present invention. [Figure 12] It is a schematic configuration diagram of the vibrator assembly according to Embodiment 3 of the present invention. [Figure 13] It is a partially enlarged view of section C in FIG. 12. Mode for Carrying Out the Invention

[0019] In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the disclosure of the present invention will be more thorough and comprehensive.

[0020] Furthermore, when an element is referred to as being "fixed" to another element, it may be directly attached to the other element, or an intermediate element may be present. When an element is considered to be "connected" to another element, it may be directly connected to the other element, or an intermediate element may be present simultaneously. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0021] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art. Terms used in the description of the present invention herein are for illustrative purposes only and do not limit the invention. The term "and / or" as used herein includes any combination of one or more related enumerated items.

[0022] Example 1 Referring to Figures 1 to 7, Embodiment 1 of the present invention includes a housing assembly 110 comprising a sleeve 111, a first cylindrical body 112 and an end cap 113, the end cap 113 being engaged with one end of the first cylindrical body 112, the sleeve 111 being fitted to the outside of the first cylindrical body 112, and a housing portion 1121 being formed in the first cylindrical body 112, and a counterweight 121 comprising a magnet 122, a second cylindrical body 123 and a stopper 124, the second cylindrical body 123 having a housing chamber 1231 and a locking groove 1232 communicating with the housing chamber 1231, and the counterweight A magnetic levitation vibration motor 100 comprises: an oscillator assembly 120 in which a weight 121 is located on one side of the magnet 122, a stopper 124 restricts the counterweight 121 and the magnet 122 within a housing chamber 1231, and one end of the stopper 124 engages with a locking groove 1232; an electromagnetic coil 130 located between a sleeve 111 and a first cylindrical body 112; and a positioning structure 140 located on the inner wall of the first cylindrical body 112 and / or the outer wall of the second cylindrical body 123 so that the second cylindrical body 123 slides spaced apart within the housing 1121, Here, the sleeve 111 is made of a magnetic material, and both the first cylindrical body and the second cylindrical body 123 are made of non-magnetic material. The magnet 122 generates a first magnetic field, and in its natural state, the magnet 122 and the sleeve 111 generate a magnetic attraction force due to the action of the first magnetic field, causing the second cylindrical body 123 to levitate within the housing 1121. The electromagnetic coil 130 generates a changing second magnetic field. In this configuration, the direction in which the vibrator assembly 120 moves toward the end cap 113 is defined as the first direction, and the interaction between the first and second magnetic fields causes the vibrator assembly 120 to reciprocate within the housing 1121 along the first direction. This provides a magnetic levitation vibration motor 100. In a specific application, the magnet 122 and sleeve 111 generate a magnetic attraction force due to the action of the first magnetic field, causing the second cylindrical body 123 to levitate within the housing 1121. Theoretically, the oscillator assembly 120 levitates in the center of the housing 1121 and vibrates linearly along the housing 1121 in the first direction due to the action of the changing second magnetic field. However, in actual applications, when the oscillator assembly 120 vibrates linearly along the first direction, a lateral offset occurs. The causes of this phenomenon include unevenness in the magnetic attraction force in the center due to the uneven thickness of the sleeve 111, or uneven distribution of the second magnetic field generated by the electromagnetic coil 130. Therefore, When the vibrator assembly 120 moves in the first direction, it becomes difficult to maintain the required linear reciprocating vibration. Therefore, in the present invention, the positioning structure 140 is provided on the inner wall of the first cylindrical body 112, or the outer wall of the second cylindrical body 123, or both. In this way, the second cylindrical body 123 abuts against the positioning structure 140 and slides within the housing 1121, ensuring that the vibrator assembly 120 vibrates linearly in the center within the housing 1121. Furthermore, the amount of offset generated by the vibrator of the magnetic levitation vibration motor 100 is reduced, and collision wear between the vibrator assembly 120 and the inner wall of the housing 1121 does not affect the service life.

[0023] In one possible embodiment, the positioning structure 140 includes a first guide pin 141, the first guide pin 141 having the same longitudinal direction as the first direction, at least two of the first guide pins 141 being spaced apart and connected to the inner wall of the first cylindrical body 112, and the sides of the first guide pins 141 abutting against the outer wall of the second cylindrical body 123 such that the second cylindrical body 123 reciprocates along the first guide pins 141 in the housing 1121. In specific applications, to avoid the installation of the positioning structure 140 affecting the vibration frequency of the transducer assembly 120, the positioning structure 140 is equipped with a first guide pin 141 identical to the first direction, the first guide pin 141 is integrally molded with the first cylindrical body 112, and at least two first guide pins 141 are connected to the inner wall of the first cylindrical body 112 at circumferential intervals, where the sides of the first guide pins 141 abut against the outer wall of the second cylindrical body 123, so that the second cylindrical body 123 reciprocates along the first guide pins 141 in the housing 1121. In this way, the positioning structure 140 improves the linear vibration characteristics at the center of the transducer assembly 120, while simultaneously avoiding the positioning structure 140 creating resistance to the reciprocating vibration of the transducer assembly 120.

[0024] In one possible embodiment, the first guide pin 141 includes a first cylindrical surface 1411 that abuts against the outer wall of the second cylindrical body 123 so as to be in tangential contact with the outer wall of the second cylindrical body 123. In a specific application, in order to reduce the contact area between the first guide pin 141 and the second cylindrical body 123, the first cylindrical surface 1411 of the first guide pin 141 abuts against the outer wall of the second cylindrical body 123, thereby causing tangential contact between the first guide pin 141 and the outer wall of the second cylindrical body 123. In this way, the frictional force between the first guide pin 141 and the second cylindrical body 123 can be reduced, ensuring smoothness when the vibrator assembly 120 vibrates linearly back and forth within the housing 1121.

[0025] In one possible embodiment, the end cap 113 includes an engagement groove 1131 communicating with a housing portion 1121, an engagement portion 1122 protruding from one end of the first cylindrical body 112 which fits into the engagement groove 1131, and a ventilation hole 1123 communicating with the housing portion 1121 formed at the other end of the first cylindrical body 112 away from the end cap 113. In a specific application, since the engagement groove 1131 communicates with the housing portion 1121, a ventilation hole 1123 is formed in the first cylindrical body 112 that communicates with the housing portion 1121. Thus, when the transducer assembly 120 vibrates back and forth in the housing portion 1121, the end cap 113 and both ends of the first cylindrical body 112 compress the air inside the housing portion 1121, generating significant air resistance. By connecting the engagement groove 1131 and the housing portion 1121 to the ventilation hole 1123 of the housing portion 1121, the compressed air in the housing portion 1121 is discharged to the outside in a timely manner, and the influence of air resistance on the vibration intensity and frequency of the transducer assembly 120 can be eliminated.

[0026] In one possible embodiment, counterweights 121 are provided on each side of the magnet 122, and both counterweights 121 are located within the housing chamber 1231. In specific applications, the connection of the counterweights 121 to the magnet 122 increases the inertial force of the transducer assembly 120, improving the vibration intensity in the housing section 1121 of the transducer assembly 120. If the counterweights 121 are provided on only one side of the magnet 122, the intensity and frequency of the reciprocating vibration of the transducer assembly 120 may become mismatched or the balance of the reciprocating vibration of the transducer assembly 120 may be disrupted, potentially leading to abnormal power consumption, overheating, or damage to the electromagnetic coil 130. Therefore, it is necessary to place counterweights 121 on both sides of the magnet 122 to improve the vibration intensity in the housing section 1121 of the transducer assembly 120.

[0027] Example 2 This embodiment differs from Embodiment 1 in its positioning structure 140, and the specific differences are as follows.

[0028] Referring to Figures 8 to 10, the positioning structure 140 according to Embodiment 2 of the present invention further includes a second guide pin 142, the second guide pin 142 having the same longitudinal direction as the first direction, at least two second guide pins 142 connected at intervals to the outer wall of the second cylindrical body 123, and the sides of the second guide pins 142 abut against the inner wall of the first cylindrical body 112 such that the second cylindrical body 123 vibrates back and forth along the second guide pins 142 in the housing 1121. In specific applications, the positioning structure 140 may also be a second guide pin 142. The second guide pin 142 is the same as in the first direction, and the difference from Embodiment 1 is that at least two second guide pins 142 are connected to the outer wall of the second cylindrical body 123 at intervals around its periphery, the second guide pins 142 are integrally molded with the second cylindrical body 123, and the side surfaces of the second guide pins 142 abut against the inner wall of the first cylindrical body 112. This causes the housing portion 1121 to reciprocate along the second guide pins 142 in the second cylindrical body 123. In this way, the linear vibration characteristics at the center of the transducer assembly 120 can also be improved by the second guide pins 142, while simultaneously avoiding the positioning structure 140 creating resistance to the reciprocating vibration of the transducer assembly 120.

[0029] Furthermore, the second guide pin 142 includes a second cylindrical surface 1422 that abuts against the inner wall of the first cylindrical body 112, and arcuate surfaces 1421 that are smoothly connected to both sides of the second cylindrical surface 1422, so as to make tangential contact between the second guide pin 142 and the inner wall of the first cylindrical body 112. In a specific application, in order to avoid the ends of the second guide pin 142 interfering with the movement of the end cap 113 or the bottom wall of the first cylindrical body 112, arcuate surfaces 1421 are provided at both ends of the second guide pin 142, and the arcuate surfaces 1421 and the second cylindrical surface 1422 are smoothly connected so that the second guide pin 142 and the inner wall of the first cylindrical body 112 make tangential contact. In this way, the frictional force between the second guide pin 142 and the first cylindrical body 112 can also be reduced, ensuring smoothness when the vibrator assembly 120 vibrates linearly back and forth in the housing 1121.

[0030] Example 3 This embodiment differs from Embodiment 1 in its positioning structure 140, and the specific differences are as follows.

[0031] Referring to Figures 11 to 13, the positioning structure 140 according to Embodiment 3 of the present invention further includes a third guide pin 143, the third guide pin 143 having the same longitudinal direction as the first direction, at least two sets of third guide pins 143 connected at intervals to the outer wall of the second cylindrical body 123, and the sides of the third guide pins 143 abut against the inner wall of the first cylindrical body 112 such that the second cylindrical body 123 vibrates back and forth along the third guide pins 143 in the housing 1121. In specific applications, the positioning structure 140 may also be a third guide pin 143. The third guide pin 143 is the same as in the first direction, and the difference from Embodiment 1 is that at least two sets of third guide pins 143 are connected to the outer wall of the second cylindrical body 123 at intervals around the periphery, the third guide pins 143 are integrally molded with the second cylindrical body 123, and the side surface of the third guide pin 143 abuts against the inner wall of the first cylindrical body 112. This causes the housing portion 1121 to reciprocate along the third guide pin 143 in the second cylindrical body 123. In this way, the linear vibration characteristics at the center of the transducer assembly 120 can be improved by the third guide pin 143, while simultaneously avoiding the positioning structure 140 creating resistance to the reciprocating vibration of the transducer assembly 120.

[0032] Furthermore, each set of third guide pins 143 includes two adjacent third guide pins 143, the adjacent third guide pins 143 having a first sliding groove 1431 formed therein, and the first guide pins 141 abut against the first sliding groove 1431 such that the second cylindrical body 123 vibrates back and forth along the housing portion 1121 along the first sliding groove 1431. In specific applications, during the reciprocating vibration of the transducer assembly 120, not only is there a lateral offset, but a certain degree of rotation also occurs in the transducer assembly 120. For high-frequency vibrations of the transducer assembly 120, this easily causes rotational friction between the third guide pin 143 and the first cylindrical body 112, which can cause lateral scratches on the third guide pin 143. Since such scratches lead to an increase in frictional force during high-frequency reciprocating vibrations, an adjacent third guide pin 143 is formed on each pair of third guide pins 143, and a first sliding groove 1431 is formed on the adjacent third guide pin 143. When the first guide pin 141 is restricted to sliding in the first sliding groove 1431, the housing portion 1121 can be reciprocated along the first sliding groove 1431 by the second cylindrical body 123.

[0033] Example 4 This embodiment differs from Embodiment 14 in its positioning structure 140, and the specific differences are as follows.

[0034] Referring to Figures 1 to 7, the positioning structure 140 according to Embodiment 4 of the present invention includes a fourth guide pin (not shown), the fourth guide pin having the same longitudinal direction as the first direction, at least two sets of fourth guide pins connected to the inner wall of the first cylindrical body 112 at intervals, and the sides of the fourth guide pins abut against the outer wall of the second cylindrical body 123 such that the second cylindrical body 123 vibrates back and forth along the fourth guide pins in the housing portion 1121.

[0035] Each set of fourth guide pins includes two adjacent fourth guide pins, the adjacent fourth guide pins having a second sliding groove (not shown), and the second guide pin 142 abuts against the second sliding groove so that the second cylindrical body 123 vibrates back and forth along the second sliding groove in the housing 1121. In specific applications, the positioning structure 140 may also be the fourth guide pin, and the fourth guide pin is the same as in the first direction, the difference from Embodiment 1 is that at least two sets of fourth guide pins are connected to the inner wall of the first cylindrical body 112 with spacing around it, the fourth guide pin is integrally molded with the first cylindrical body 112, and the side surface of the fourth guide pin abuts against the inner wall of the second cylindrical body 123, causing the second cylindrical body 123 to vibrate back and forth along the fourth guide pin in the housing 1121, and in this way the fourth guide pin This improves the linear vibration characteristics at the center of the transducer assembly 120 while simultaneously preventing the positioning structure 140 from creating resistance to the reciprocating vibration of the transducer assembly 120. Here, an adjacent fourth guide pin is formed on each set of fourth guide pins, and a second sliding groove is formed on the adjacent fourth guide pin. When the second guide pin 142 is restricted to sliding in the second sliding groove, the housing 1121 can be reciprocated along the second sliding groove 123 by the second cylindrical body 123.

[0036] The embodiments described above illustrate only a few embodiments of the present application, and while their descriptions are specific and detailed, this should not be understood as limiting the scope of the patent application. It should be noted that a person skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and all of these fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for the present invention should be based on the attached claims. [Explanation of symbols]

[0037] 100: Magnetic levitation vibration motor 110: Enclosure Assembly 111: Sleeve 112: First Cylinder 1121: Containment Unit 1122: Engaging part 1123: Ventilation holes 113: End cap 1131: Engagement groove 120: Oscillator Assembly 121: Counterweight 122: Magnet 123: Second cylindrical body 1231: Confinement Room 1232: Section Groove 124: Stopper 130: Electromagnetic coil 140: Positioning structure 141: First guide pin 1411: First cylindrical surface 142: Second guide pin 1421: Circular arc surface 1422: Second cylindrical surface 143: Third guide pin 1431: First sliding groove

Claims

1. A magnetic levitation vibration motor, A housing assembly comprising a sleeve, a first cylindrical body, and an end cap, wherein the end cap is engaged with one end of the first cylindrical body, the sleeve is fitted to the outside of the first cylindrical body, and a housing portion is formed in the first cylindrical body, A vibrator assembly comprising a counterweight, a magnet, a second cylindrical body, and a stopper, wherein the second cylindrical body has a housing chamber and a locking groove communicating with the housing chamber, the counterweight is located on one side of the magnet, the stopper restricts the counterweight and the magnet to the housing chamber, and one end of the stopper engages with the locking groove, An electromagnetic coil located between the sleeve and the first cylindrical body, The second cylindrical body slides within the housing at a distance from the other cylindrical body, and the positioning structure is located on the inner wall of the first cylindrical body and / or the outer wall of the second cylindrical body, Here, the sleeve is made of a magnetic material, and both the first and second cylindrical bodies are made of non-magnetic materials, and the magnet generates a first magnetic field, and in its natural state, the magnet and the sleeve generate a magnetic attraction force due to the action of the first magnetic field, causing the second cylindrical body to levitate within the housing, and the electromagnetic coil generates a changing second magnetic field, in which case the direction toward the end cap of the resonator assembly is defined as the first direction, and the interaction between the first and second magnetic fields causes the resonator assembly to vibrate back and forth within the housing along the first direction. A magnetic levitation vibration motor characterized by the following features.

2. The positioning structure includes a first guide pin, the first guide pin having the same longitudinal direction as the first direction, at least two of the first guide pins being connected to the inner wall of the first cylindrical body at intervals, and the sides of the first guide pins being in contact with the outer wall of the second cylindrical body so that the second cylindrical body vibrates back and forth along the first guide pins within the housing. The magnetic levitation vibration motor according to feature 1.

3. The first guide pin includes a first cylindrical surface that abuts against the outer wall of the second cylindrical body so as to be in tangential contact with the outer wall of the second cylindrical body. The magnetic levitation vibration motor according to feature 2.

4. The end cap includes an engagement groove that communicates with the housing, an engagement portion that fits into the engagement groove is provided at one end of the first cylindrical body, and a ventilation hole communicating with the housing is formed at the other end of the first cylindrical body that is away from the end cap. A magnetic levitation vibration motor according to any one of claims 1 to 3.

5. Each of the magnets is provided with a counterweight, and both counterweights are located within the containment chamber. The magnetic levitation vibration motor according to feature 1.

6. The positioning structure further includes a second guide pin, the second guide pin having the same longitudinal direction as the first direction, at least two of the second guide pins being connected at intervals to the outer wall of the second cylindrical body, and the sides of the second guide pins being in contact with the inner wall of the first cylindrical body such that the second cylindrical body vibrates back and forth along the second guide pins within the housing. The magnetic levitation vibration motor according to feature 1.

7. The second guide pin comprises a second cylindrical surface that abuts against the inner wall of the first cylindrical body such that the second guide pin and the inner wall of the first cylindrical body are in tangential contact, and arcuate surfaces smoothly connected to both sides of the second cylindrical surface. The magnetic levitation vibration motor according to feature 6.

8. The positioning structure further includes a third guide pin, the third guide pin having the same longitudinal direction as the first direction, at least two sets of the third guide pins being connected at intervals to the outer wall of the second cylindrical body, and the sides of the third guide pins being in contact with the inner wall of the first cylindrical body such that the second cylindrical body vibrates back and forth along the third guide pins within the housing. The magnetic levitation vibration motor according to feature 2 or 3.

9. Each set of third guide pins includes two adjacent third guide pins, the adjacent third guide pins having a first sliding groove formed therein, and the first guide pins abut against the first sliding groove such that the second cylindrical body reciprocates along the first sliding groove within the housing. The magnetic levitation vibration motor according to feature 8.

10. The positioning structure includes a fourth guide pin, the fourth guide pin having the same longitudinal direction as the first direction, at least two sets of the fourth guide pins being connected at intervals to the inner wall of the first cylindrical body, and the sides of the fourth guide pins being in contact with the outer wall of the second cylindrical body such that the second cylindrical body vibrates back and forth along the fourth guide pins in the housing. Each set of the fourth guide pins includes two adjacent fourth guide pins, the adjacent fourth guide pins having a second sliding groove formed therein, and the second guide pins are in contact with the second sliding groove such that the second cylindrical body reciprocates along the second sliding groove within the housing. The magnetic levitation vibration motor according to feature 6 or 7.

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