Vibration motor
By designing a vibration motor that includes a stator, a mover, and elastic components, the problems of large size and complex structure in existing technologies have been solved, achieving miniaturization, easy assembly, and efficient vibration sensing.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- AAC MICROTECH (CHANGZHOU) CO LTD
- Filing Date
- 2024-12-03
- Publication Date
- 2026-06-11
AI Technical Summary
Existing vibration devices are large in size, complex in structure, and cumbersome to assemble, making them difficult to apply in applications with high cost and performance requirements.
A vibration motor is designed, including a stator, a mover, and an elastic element. The stator consists of a housing and a drive assembly. The mover is suspended in a housing space by the elastic element. The magnet part is magnetized along a first direction and includes two sections with opposite magnetization directions. When current is applied to the winding, an electromagnetic force is generated to drive the mover to vibrate.
This invention achieves a vibration motor that is small in size, simple in structure, and easy to assemble, providing a more powerful vibration experience, reducing production costs and requirements, and offering fast response and realistic vibration.
Smart Images
Figure CN2024136485_11062026_PF_FP_ABST
Abstract
Description
A vibration motor Technical Field
[0001] This application relates to the field of vibration devices, specifically to a vibration motor. Background Technology
[0002] In the existing technology, the most common vibration device is the X-axis linear motor. X-axis linear motors are not only large in size, but also have a complex structure, are cumbersome to assemble, and are expensive, making them difficult to apply in some applications where both cost and performance are important.
[0003] Therefore, it is necessary to provide a vibration motor that is small in size, simple in structure, and easy to assemble. Technical issues
[0004] The purpose of this application is to provide a vibration motor that solves the technical problems of large size, complex structure and cumbersome assembly of existing vibration devices. Technical solutions
[0005] The technical solution of this application is as follows:
[0006] This application provides a vibration motor, comprising:
[0007] The stator includes a housing with a receiving space and two drive components housed within the receiving space. The two drive components are symmetrically disposed at both ends of the housing in a first direction. Each drive component includes an iron core fixed to the housing and a winding arranged around the first direction and wound around the outer periphery of the iron core. The current direction of the windings of the two drive components is the same.
[0008] Elastic components; and
[0009] The mover has its end in a second direction connected to the housing via the elastic member and suspended within the receiving space. The second direction is perpendicular to the first direction. The mover includes a magnet located between the two drive components. The magnet is magnetized along the first direction and includes two sections with opposite magnetization directions.
[0010] When a periodic current is applied to the winding, the stator generates a periodic electromagnetic force on the mover to drive the mover to vibrate along the second direction.
[0011] Preferably, the vibration motor includes two of the elastic elements;
[0012] The mover also includes two pole cores, which are symmetrically fixed at both ends of the magnet in the second direction. One pole core is connected to the outer shell through one of the elastic elements, and the other pole core is connected to the outer shell through the other elastic element.
[0013] Preferably, the outer shell is a hollow structure with two openings, the two openings being arranged opposite each other in the second direction, and the hollow portion of the outer shell is configured as the receiving space;
[0014] The elastic element is provided in a one-to-one correspondence with the opening. The two ends of the elastic element in the third direction are respectively fixed to the outer shell so that each elastic element spans across the corresponding opening. The third direction is perpendicular to the first direction and the second direction.
[0015] Preferably, the elastic element has a through hole;
[0016] The pole core includes a body and a protrusion protruding from the body, the protrusion being inserted into the corresponding through hole.
[0017] Preferably, the elastic element has two through holes that are spaced apart and symmetrically arranged in a third-direction upward direction;
[0018] The pole core includes two protrusions that are spaced apart and symmetrically arranged in the third direction, and the protrusions are arranged in a one-to-one correspondence with the through holes.
[0019] Preferably, the magnet is an integrally magnetized part.
[0020] Preferably, the magnet section further includes a non-magnetic region located between the two sections with opposite magnetization directions.
[0021] Preferably, the magnet portion includes a first magnet and a second magnet, the first magnet and the second magnet have opposite magnetization directions, and the first magnet and the second magnet are bonded together to form the magnet portion.
[0022] Preferably, the outer shell is a one-piece structure;
[0023] Alternatively, the outer shell may be formed by assembling at least two shell portions.
[0024] Preferably, the iron core is formed by stacking multiple layers of iron sheets. Beneficial effects
[0025] The beneficial effects of this application are as follows: The vibration motor of this application includes a mover, a stator, and an elastic element. The stator includes a housing with a receiving space and two drive components housed within the receiving space. The two drive components are symmetrically arranged at both ends of the housing in a first direction. Each drive component includes an iron core fixed to the housing and a winding arranged around the iron core in the first direction. The end of the mover in the second direction is connected to the housing via an elastic element and suspended within the receiving space. The mover includes a magnet portion located between the two drive components. This design is not only simple in structure and small in size, but also easy to use. For assembly, it reduces production requirements and costs, and has high space utilization, providing a more powerful vibration experience in a smaller volume; the current direction of the windings of the two drive components is the same, the magnet part is magnetized along the first direction, and includes two sections with opposite magnetization directions. When current is passed through the winding, the winding is subjected to Ampere force, the iron core is subjected to electromagnetic force, and thus generates electromagnetic force on the mover. When periodic current is passed through the windings of the two drive components, the stator will generate periodic electromagnetic force on the mover, thereby driving the mover to vibrate along the second direction. The response is fast and the vibration is more realistic. Attached Figure Description
[0026] Figure 1 is a schematic diagram of the structure of the vibration motor of this application.
[0027] Figure 2 is a partial structural schematic diagram of the vibration motor shown in Figure 1.
[0028] Figure 3 is a front view of the vibration motor shown in Figure 1.
[0029] Figure 4 is a schematic diagram of the excitation of the AA section in Figure 3.
[0030] Figure 5 is an exploded view of the vibration motor shown in Figure 1.
[0031] Figure 6 is a schematic diagram of the stator structure in the vibration motor shown in Figure 1.
[0032] Figure 7 is a schematic diagram of the moving part structure in the vibration motor shown in Figure 1.
[0033] Figure 8 is a schematic diagram of the first structure of the magnet section in the vibration motor shown in Figure 1.
[0034] Figure 9 is a schematic diagram of the second structure of the magnet section in the vibration motor shown in Figure 1.
[0035] Figure 10 is a schematic diagram of the third structure of the magnet part in the vibration motor shown in Figure 1.
[0036] Figure 11 is an exploded view of the first type of housing structure in the vibration motor shown in Figure 1.
[0037] Figure 12 is an exploded view of the second type of housing structure in the vibration motor shown in Figure 1.
[0038] Wherein: 1-Stator (11-Outer shell (111-Accommodation space, 112-Opening, 113-First shell part (1131-First plate, 1132-Second plate), 114-Second shell part, 115-Third shell part), 12-Drive assembly (121-Iron core, 122-Winding)), 2-Elastic element (21-Through hole), 3-Motor (31-Magnetic part (311-First magnet, 312-Second magnet, 313-Non-magnetic area), 32-Pole core (321-Body, 322-Protrusion)). Embodiments of the present invention
[0039] The present application will be further described below with reference to the accompanying drawings and embodiments.
[0040] This application provides a vibration motor, including a stator 1, an elastic element 2, and a mover 3, as shown in Figures 1 to 6. The stator 1 includes a housing 11 and two drive assemblies 12. The housing 11 has a receiving space 111, and the two drive assemblies 12 are housed within the receiving space 111. The two drive assemblies 12 are symmetrically arranged at both ends of the housing 11 in a first direction. Each drive assembly 12 includes an iron core 121 and a winding 122. The iron core 121 is fixed to the housing 11, and the winding 122 is arranged around the iron core 121 in the first direction and wound around the outer periphery of the iron core 121. The current direction of the windings 122 of the two drive assemblies 12 is the same. The end of the mover 3 in the second direction is connected to the housing 11 via the elastic element 2, thereby suspending the mover 3 within the receiving space 111 via the elastic element 2. The mover 3 includes a magnet section 31 located between the two drive components 12. The magnet section 31 is magnetized along a first direction and includes two sections with opposite magnetization directions, as shown in Figures 8 to 10. The second direction is perpendicular to the first direction.
[0041] The vibration motor of this embodiment includes a mover 3, a stator 1, and an elastic element 2. The stator 1 includes a housing 11 with a receiving space 111 and two drive components 12 housed in the receiving space 111. The two drive components 12 are symmetrically arranged at both ends of the housing 11 in a first direction. Each drive component 12 includes an iron core 121 fixed to the housing 11 and a winding 122 arranged around the iron core 121 in the first direction. The mover 3 is connected to the housing 11 at its end in the second direction through the elastic element 2 and suspended in the receiving space 111. The mover 3 includes a magnet part 31 located between the two drive components 12. The vibration motor of this embodiment is not only simple in structure and low in production cost, but also easy to assemble, reducing production requirements and costs. In addition, the vibration motor of this embodiment is small in size and has high space utilization, providing a more powerful vibration experience in a smaller volume.
[0042] In the vibration motor of this embodiment, the current direction of the windings 122 of the two drive components 12 is the same, the magnet part 31 is magnetized along the first direction, and the magnet part 31 includes two parts with opposite magnetization directions. When current is passed through the windings 122, the windings 122 are subjected to Ampere force, and the iron core 121 is subjected to electromagnetic force, thereby generating electromagnetic force on the mover 3. When periodic current is passed through the windings 122 of the two drive components 12, the stator 1 will generate periodic electromagnetic force on the mover 3, thereby driving the mover 3 to vibrate along the second direction. The response is fast and the vibration feeling is more realistic.
[0043] As an example, please refer to Figure 4. Under the excitation action shown in Figure 4, the iron core 121 in stator 1 is subjected to electromagnetic force, and the winding 122 is subjected to Ampere force. The overall resultant force is upward, thus causing the mover 3 to be subjected to a resultant force F in the downward direction. It can be understood that when a current opposite in direction to the current shown in Figure 4 is passed through the winding 122, the resultant force F on the mover 3 is upward. When a periodic current is passed through the winding 122, the stator 1 will generate a periodic electromagnetic force on the mover 3. This resultant force acts as an excitation source to drive the mover 3 to vibrate in the second direction. It is not only small in size, simple in structure, and easy to assemble, but also provides a more powerful vibration experience in a smaller volume, making the vibration more realistic.
[0044] The vibration motor of this application embodiment can be applied to side buttons, touch screens, automotive applications, or other related fields.
[0045] As an example, the second direction can be the Z-axis, and the vibration motor in this embodiment can be a Z-axis linear motor.
[0046] As an alternative implementation, the outer casing 11 may be made of a highly magnetically conductive material. The iron core 121 may also be made of a highly magnetically conductive material.
[0047] As an alternative implementation, the winding 122 can be wound around the outer periphery of the iron core 121 first, and then the iron core 121 can be fixedly connected to the side wall of the housing 11. The windings 122 of the two drive components 12 can be connected in series, or the windings 122 of the two drive components 12 can be connected in parallel.
[0048] In some preferred embodiments, referring to Figures 3 to 5, the vibration motor includes two elastic elements 2, and the mover 3 also includes two pole cores 32. One pole core 32 is fixed to one end of the magnet portion 31 in the second direction and connected to one end of the housing 11 in the second direction via one of the elastic elements 2. The other pole core 32 is fixed to the other end of the magnet portion 31 in the second direction and connected to the other end of the housing 11 in the second direction via another elastic element 2. Furthermore, the two pole cores 32 are symmetrically arranged about the magnet portion 31.
[0049] In this embodiment, the two pole cores 32 are symmetrically fixed at both ends of the magnet part 31 in the second direction, which can reduce magnetic leakage and achieve a high-efficiency magnetic field.
[0050] In some preferred embodiments, referring to FIG4, the outer shell 11 is a hollow structure with two openings 112. The two openings 112 of the outer shell 11 are arranged opposite each other in the second direction, and the hollow portion of the outer shell 11 is configured as a receiving space 111. Elastic members 2 are arranged one-to-one with the openings 112. Referring to FIG1, each elastic member 2 is fixed to the outer shell 11 at both ends in the third direction, such that each elastic member 2 spans across the corresponding opening 112, reliably and effectively suspending the mover 3 within the receiving space 111. Moreover, the third direction is perpendicular to the first and second directions. The two ends of the elastic members 2 arranged opposite each other in the third direction are fixed to the outer shell 11. Two drive components 12 are symmetrically arranged at both ends of the outer shell 11 in the first direction, effectively improving vibration.
[0051] In some preferred embodiments, referring to Figure 5, the elastic element 2 can be a spring sheet, and each elastic element 2 has a through hole 21. The pole core 32 includes a body 321 and a protrusion 322. The protrusion 322 protrudes from the body 321, and the protrusion 322 is provided in a one-to-one correspondence with the through hole 21. The protrusion 322 can be inserted into the corresponding through hole 21, thereby quickly and accurately installing the elastic element 2 and the mover 3.
[0052] As an example, each elastic element 2 is fixed at both ends of the third direction to one end face of the outer shell 11 in the second direction, and the middle part of the elastic element 2 is fixedly connected to the protrusion 322 of the pole core 32. The structure is simple and easy to assemble.
[0053] As an optional implementation, referring to Figure 5, each elastic element 2 has two through holes 21, which are spaced apart and symmetrically arranged in a third direction, perpendicular to the first and second directions. Correspondingly, each pole core 32 includes two protrusions 322, which are spaced apart and symmetrically arranged in a third direction, and the protrusions 322 correspond one-to-one with the through holes 21, thereby more stably and reliably suspending the mover 3 within the receiving space 111.
[0054] In some embodiments, the protrusion 322 can be a stepped structure as shown in Figure 7. It should be noted that in other embodiments, the protrusion 322 can be a structure of other shapes. For example, the protrusion 322 can be a cylinder, a square, or any other arbitrary protruding shape, which can be set according to the actual situation, and will not be elaborated here.
[0055] In some embodiments, the magnet part 31 can be magnetized as a single piece, as shown in Figures 8 and 9.
[0056] As an alternative implementation, referring to FIG8, the magnet section 31 may also include a non-magnetic region 313, which is located between two sections with opposite magnetization directions.
[0057] As an alternative implementation, please refer to FIG9, the magnet part 31 may not have a non-magnetic area.
[0058] In some embodiments, the magnet portion 31 can be magnetized separately. The magnet portion 31 may include a first magnet 311 and a second magnet 312, with the magnetization directions of the first magnet 311 and the second magnet 312 being opposite, as shown in FIG10. As an example, the magnet portion 31 may be formed by bonding the first magnet 311 and the second magnet 312 together.
[0059] In some implementations, referring to Figure 5, the housing 11 can be a one-piece structure, which further reduces the assembly process of the vibration motor and makes it easier to assemble.
[0060] In some other embodiments, for ease of processing, the outer shell 11 can be a split structure, and the outer shell 1 can be formed by assembling at least two shell parts.
[0061] As one embodiment, referring to FIG11, the outer shell 11 can be formed by assembling two first shell portions 113. The two first shell portions 113 are centrally symmetrical about the central axis of the outer shell 11. Each first shell portion 113 includes a first plate 1131 and a second plate 1132 formed by bending one end of the first plate 1131. The end of the first plate 1131 of one first shell portion 113 away from the second plate 1132 is fixed to the second plate 1132 of the other first shell portion 113, and the end of the second plate 1132 of the first shell portion 113 away from the first plate 1131 is fixed to the first plate 1131 of the other first shell portion 113, so as to enclose and form a receiving space 111.
[0062] As an example, the two first shell parts 113 can be fixedly connected by welding or other means.
[0063] As one embodiment, referring to FIG12, the outer shell 11 can be formed by assembling two second shell portions 114 and two third shell portions 115. The two second shell portions 114 are spaced apart and symmetrically arranged, and the two third shell portions 115 are spaced apart and symmetrically arranged. The two second shell portions 114 are connected through the two third shell portions 115 to enclose and form a receiving space 111.
[0064] As an example, the second shell portion 114 and the third shell portion 115 can be fixedly connected by welding or other means.
[0065] In some embodiments, the iron core 121 can be formed by stacking multiple layers of iron sheets, thereby reducing eddy current losses. It should be noted that in other embodiments, the iron core 121 can also be a one-piece structure, which can be set according to the actual situation, and will not be elaborated here.
[0066] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.
Claims
1. A vibration motor, characterized by, include: The stator includes a housing with a receiving space and two drive components housed within the receiving space. The two drive components are symmetrically disposed at both ends of the housing in a first direction. Each drive component includes an iron core fixed to the housing and a winding arranged around the first direction and wound around the outer periphery of the iron core. The current direction of the windings of the two drive components is the same. Elastic components; and The mover has its end in a second direction connected to the housing via the elastic member and suspended within the receiving space. The second direction is perpendicular to the first direction. The mover includes a magnet located between the two drive components. The magnet is magnetized along the first direction and includes two sections with opposite magnetization directions. When a periodic current is applied to the winding, the stator generates a periodic electromagnetic force on the mover to drive the mover to vibrate along the second direction.
2. The vibrating motor of claim 1, wherein The vibration motor includes two of the elastic elements; The mover also includes two pole cores, which are symmetrically fixed at both ends of the magnet in the second direction. One pole core is connected to the outer shell through one of the elastic elements, and the other pole core is connected to the outer shell through the other elastic element.
3. The vibrating motor of claim 2, wherein The outer shell is a hollow structure with two openings, which are arranged opposite to each other in the second direction, and the hollow portion of the outer shell is configured as the receiving space; The elastic element is provided in a one-to-one correspondence with the opening. The two ends of the elastic element in the third direction are respectively fixed to the outer shell so that each elastic element spans across the corresponding opening. The third direction is perpendicular to the first direction and the second direction.
4. The vibrating motor of claim 3, wherein The elastic element has a through hole; The pole core includes a body and a protrusion protruding from the body, the protrusion being inserted into the corresponding through hole.
5. The vibrating motor of claim 4, wherein The elastic element has two through holes that are spaced apart and symmetrically arranged in a third direction upwards; The pole core includes two protrusions that are spaced apart and symmetrically arranged in the third direction, and the protrusions are arranged in a one-to-one correspondence with the through holes.
6. The vibrating motor of claim 1, wherein The magnet section is magnetized as a single unit.
7. The vibrating motor of claim 6, wherein The magnet section also includes a non-magnetic region located between the two sections with opposite magnetization directions.
8. The vibrating motor of claim 1, wherein The magnet section includes a first magnet and a second magnet, the first magnet and the second magnet are magnetized in opposite directions, and the first magnet and the second magnet are bonded together to form the magnet section.
9. The vibrating motor of claim 1, wherein The outer shell is a single-piece structure; Alternatively, the outer shell may be formed by assembling at least two shell portions.
10. The vibrating motor of claim 1, wherein The iron core is formed by stacking multiple layers of iron sheets.