Vibration motor
By designing a simple vibration motor structure, including a stator, elastic element, and mover, the problems of large size and complex structure of existing vibration devices are solved, achieving miniaturization, easy assembly, and high vibration sensitivity, making it suitable for side buttons, touch screens, and automotive devices.
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, an elastic element, and a mover. The stator consists of a housing and windings arranged around a first direction. The mover is suspended in a receiving space by the elastic element. The mover consists of spaced pole cores and magnets with opposite magnetization directions. The mover part is surrounded inside the windings. The structure is simple and easy to assemble.
It achieves small size, high space utilization, realistic vibration, fast response, reduced production costs and assembly difficulty, and is suitable for side buttons, touch screens and automotive devices.
Smart Images
Figure CN2024136488_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 having a receiving space and a winding housed within the receiving space, the winding being arranged around a first direction and fixed to the housing;
[0008] Elastic components; and
[0009] The mover is connected to the housing via the elastic element at its end in the first direction and suspended within the receiving space. The mover includes a first pole core and a second pole core spaced apart in the first direction, at least two magnets disposed between the first pole core and the second pole core along the first direction, and a third pole core disposed between adjacent magnets. Each magnet is magnetized along the first direction, and the magnetization directions of adjacent magnets are opposite. The mover is at least partially surrounded within the winding.
[0010] Preferably, the vibration motor includes two elastic elements, namely a first elastic element and a second elastic element. The first elastic element is fixed to one end of the housing along the first direction and connected to one end of the mover. The second elastic element is fixed to the other end of the housing along the first direction and connected to the other end of the mover.
[0011] Preferably, the stator includes a plurality of windings arranged sequentially along a first direction, wherein the plurality of windings are coaxially arranged and the current directions of two adjacent windings are opposite.
[0012] Preferably, the number of the third pole cores is the same as the number of the windings, and the windings are wrapped around the corresponding third pole cores.
[0013] Preferably, the outer shell is a hollow structure having a first opening and a second opening, the first opening and the second opening being disposed opposite to each other in the first direction, and the hollow portion of the outer shell is configured as the receiving space;
[0014] The first elastic element is disposed corresponding to the first opening. The two ends of the first elastic element are respectively fixed to the outer shell, and the middle part of the first elastic element is fixed to the first pole core. The second elastic element is disposed corresponding to the second opening. The two ends of the second elastic element are respectively fixed to the outer shell, and the middle part of the second elastic element is fixed to the second pole core.
[0015] Preferably, the first elastic member has a first hole, and the first pole core includes a first body and a first protrusion formed in the first body, the first protrusion being inserted into and fixed to the first hole.
[0016] The second elastic member has a second hole, and the second pole core includes a second body and a second protrusion formed on the second body. The second protrusion is inserted into and fixed to the second hole.
[0017] Preferably, the first elastic member has two first holes, which are spaced apart and symmetrically arranged along the length of the first elastic member. The first pole core includes two first protrusions, which are arranged in a one-to-one correspondence with the first holes.
[0018] The second elastic member has two second holes, which are spaced apart and symmetrically arranged along the length of the second elastic member. The second pole core includes two second protrusions, which are arranged in a one-to-one correspondence with the second holes.
[0019] Preferably, the length of the outer casing in the second direction is greater than the length of the outer casing in the third direction; the second direction is perpendicular to the third direction and is also perpendicular to the first direction.
[0020] The first elastic member is fixed at both ends of the outer shell in the second direction, and the second elastic member is fixed at both ends of the outer shell in the second direction.
[0021] Preferably, the outer shell is a one-piece structure or is formed by assembling at least two shell parts. Beneficial effects
[0022] The beneficial effects of this application are as follows: The vibration motor of this application includes a stator, a housing with a receiving space, and a winding housed within the receiving space. The winding is arranged around a first direction and fixed to the housing. An elastic element is also included. The motor is connected to the housing via the elastic element at its end in the first direction and suspended within the receiving space. The motor includes a first pole core and a second pole core spaced apart in the first direction, at least two magnets disposed between the first pole core and the second pole core along the first direction, and a third pole core disposed between adjacent magnets. Each magnet is magnetized along the first direction, and the magnetization directions of adjacent magnets are opposite. The motor is at least partially surrounded by the winding. This design is not only simple in structure and small in size, easy to assemble, and reduces production requirements and costs, but also has high space utilization, providing a great vibration sensation in a small volume. When a periodic current is applied to the winding, the stator generates a periodic electromagnetic force on the motor. This electromagnetic force acts as an excitation source to drive the motor to vibrate along the first direction, resulting in a fast response and a more realistic vibration sensation. Attached Figure Description
[0023] Figure 1 is a structural schematic diagram of a vibration motor provided in this application.
[0024] Figure 2 is a schematic diagram of a partial structure of the vibration motor shown in Figure 1.
[0025] Figure 3 is an exploded view of the vibration motor shown in Figure 1.
[0026] Figure 4 is a schematic diagram of the stator structure in the vibration motor shown in Figure 1.
[0027] Figure 5 is a top view of the vibration motor shown in Figure 1.
[0028] Figure 6 is a schematic diagram of the excitation of the AA section in Figure 5.
[0029] Figure 7 is a schematic diagram of another magnetization direction of the mover in the vibratory motor shown in Figure 1.
[0030] Figure 8 is an exploded view of the first type of housing structure in the vibration motor shown in Figure 1.
[0031] Figure 9 is an exploded view of the second type of housing structure in the vibration motor shown in Figure 1.
[0032] Figure 10 is a schematic diagram of another vibration motor provided in this application.
[0033] Figure 11 is a top view of the vibration motor shown in Figure 10.
[0034] Figure 12 is a schematic diagram of the excitation of the BB section of Figure 11.
[0035] Wherein: 1-Stator (11-Outer shell (111-Receiving space, 112-First opening, 113-Second opening, 114-First shell part (1141-First plate, 1142-Second plate), 115-Second shell part (1151-Third plate, 1152-Fourth plate), 116-Third shell part, 117-Fourth shell part), 12-Winding), 2-Elastic element (2a-First elastic element, 2b-Second elastic element, 21-First hole, 22-Second hole), 3-Motor (31-Magnet, 33-First pole core (331-First body, 332-First protrusion), 34-Second pole core (341-Second body, 342-Second protrusion), 35-Third pole core). Embodiments of the present invention
[0036] The present application will be further described below with reference to the accompanying drawings and embodiments.
[0037] Please refer to Figures 1 to 6. This application provides a vibration motor, including a stator 1, an elastic element 2, and a mover 3. The stator 1 includes a housing 11 and a winding 12. The housing 11 has a receiving space 111. The winding 12 is received within the receiving space 111 and fixed to the housing 11. The winding 12 is arranged around a first direction. The end of the mover 3 in the first direction is connected to the housing 11 via the elastic element 2 and suspended within the receiving space 111. The mover 3 includes at least two magnets 31, a first pole core 33, a second pole core 34, and a third pole core 35. The first pole core 33 and the second pole core 34 are spaced apart in the first direction. All magnets 31 are spaced apart along the first direction and disposed between the first pole core 33 and the second pole core 34. Each magnet 31 is magnetized along the first direction, and the magnetization directions of adjacent magnets 31 are opposite. The third pole core 35 is disposed between adjacent magnets 31. The mover 3 is at least partially surrounded within the winding 12, and there is a gap between the mover 3 and the winding 12.
[0038] The vibration motor of this application embodiment includes a stator 1, an elastic element 2, and a mover 3. The stator 1 includes a housing 11 with a receiving space 111 and a winding 12 housed within the receiving space 111. The winding 12 is arranged around a first direction and fixed to the housing 11. The end of the mover 3 in the first direction is connected to the housing 11 via the elastic element 2 and suspended within the receiving space 111. The mover 3 includes a first pole core 33 and a second pole core 34 spaced apart in the first direction, at least two magnets 31 disposed between the first pole core 33 and the second pole core 34 along the first direction, and a third pole core 35 disposed between two adjacent magnets 31. Each magnet 31 is magnetized along the first direction, and the magnetization directions of two adjacent magnets are opposite. The mover 3 is at least partially surrounded within the winding 12, and there is a gap between the mover 3 and the winding 12. The vibration motor of this application embodiment has a simple structure, low production cost, and a simple and easy assembly process, further reducing production requirements and costs. The vibration motor of this application embodiment is small in size and has a high space utilization rate, and can provide a great vibration in a small volume.
[0039] In the vibration motor of this application embodiment, when a periodic current is applied to the winding 12, the stator 1 generates a periodic electromagnetic force on the mover 3. This electromagnetic force serves as an excitation source to drive the mover 3 to vibrate along a first direction, resulting in a fast response and a more realistic vibration sensation.
[0040] The vibration motor of this application embodiment can be applied to side buttons, touch screens, automotive applications, or other related fields.
[0041] As an example, the first direction can be the Z-axis, and the vibration motor in this embodiment can be a Z-axis linear motor.
[0042] In some embodiments, the vibration motor includes two elastic elements 2, namely a first elastic element 2a and a second elastic element 2b. The first elastic element 2a is fixed to one end of the housing 11 along a first direction and connected to one end of the mover 3, and the second elastic element 2b is fixed to the other end of the housing 11 along the first direction and connected to the other end of the mover 3, thereby reliably and effectively suspending the mover 3 within the receiving space 111.
[0043] In some embodiments, the winding 12 can be glued and fixed to the outer shell 11, or the winding 12 can be fixedly connected to the outer shell 11 by other structures such as a skeleton. The specific configuration can be determined according to the actual situation, and will not be elaborated here.
[0044] In some embodiments, referring to Figures 1 to 6, the stator 1 may include a winding 12. Correspondingly, the mover 3 includes a first pole core 33, a second pole core 34, a third pole core 35, and two magnets 31. The first pole core 33, one of the magnets 31, the third pole core 35, the other magnet 31, and the second pole core 34 are sequentially arranged and fixedly connected along a first direction. Furthermore, both magnets 31 are magnetized along the first direction, and the magnetization directions of the two magnets 31 are opposite. In this embodiment, the N poles of the two magnets 31 are arranged facing each other, as shown in Figure 6.
[0045] In this embodiment, the excitation diagram of the magnet 31 is shown in Figure 6. Under the excitation in the direction shown, the winding 12 in the stator 1 is subjected to Ampere force, and the overall resultant force of the stator 1 is downward, thus causing the resultant force on the mover 3 to be upward. When a current opposite to the current direction shown in Figure 6 is passed through the winding 12, the resultant force on the mover 3 is downward. When a periodic current is passed through the winding 12, the stator 1 will generate a periodic electromagnetic force on the mover 3. This electromagnetic force acts as an excitation source to drive the mover 3 to vibrate along the first direction, resulting in a fast response and a more realistic vibration sensation.
[0046] It should be noted that in other embodiments, please refer to Figure 7, the S poles of the two magnets 31 can be arranged facing each other, which can be set according to the actual situation and is not limited here.
[0047] In some embodiments, as shown in Figures 10 to 12, the stator 1 may include a plurality of windings 12, all of which may be coaxially arranged and spaced apart sequentially along a first direction, and all of the windings 12 are fixed to the housing 11. Furthermore, the current directions of two adjacent windings 12 are opposite.
[0048] Accordingly, the mover 3 includes a first pole core 33, a second pole core 34, multiple third pole cores 35, and multiple magnets 31. A third pole core 35 is disposed between two adjacent magnets 31, and the number of magnets 31 is one more than the number of windings 12. The number of third pole cores 35 is the same as the number of windings 12, and the third pole cores 35 and windings 12 are arranged in a one-to-one correspondence, with each winding 12 surrounding the corresponding third pole core 35.
[0049] As an optional implementation, referring to Figure 12, the stator 1 may include two windings 12 spaced apart in a first direction, with the current directions of the two windings 12 being opposite. The mover 3 may include a first pole core 33, a second pole core 34, two third pole cores 35, and three magnets 31. A third pole core 35 is disposed between two adjacent magnets 31, and the windings 12 are wrapped around the corresponding third pole core 35. All magnets 31 are magnetized along the first direction, and the magnetization directions of adjacent magnets 31 are opposite.
[0050] It should be noted that in other embodiments, the stator 1 may include more windings 12, and the number of third pole cores 35 and magnets 31 in the mover 3 will be increased accordingly. The number of windings 12 can be set according to the actual situation and is not limited here.
[0051] In some preferred embodiments, referring to Figures 6 and 12, the outer shell 11 is a hollow structure with a first opening 112 and a second opening 113, which are arranged opposite to each other in a first direction. The hollow portion of the outer shell 11 is configured as a receiving space 111. A first elastic member 2a is correspondingly disposed with respect to the first opening 112, with its middle portion connected to the first pole core 33 and its two ends fixed to the outer shell 11. A second elastic member 2b is correspondingly disposed with respect to the second opening 113, with its middle portion connected to the second pole core 34 and its two ends fixed to the outer shell 11. In this embodiment, the first elastic member 2a and the second elastic member 2b are respectively straddling the corresponding openings, which can reliably and effectively suspend the mover 3 within the receiving space 111.
[0052] In some preferred embodiments, referring to FIG3, a first hole 21 is formed on the first elastic member 2a. Correspondingly, the first pole core 33 includes a first body 331 and a first protrusion 332. The first protrusion 332 is formed on the side of the first body 331 facing the first elastic member 2a. The first protrusion 332 is inserted into and fixed in the first hole 21, thereby fixing the first elastic member 2a and the mover 3 in place. Similarly, referring to FIG3, a second hole 22 is formed on the second elastic member 2b. The second pole core 34 includes a second body 341 and a second protrusion 342. The second protrusion 342 is formed on the side of the second body 341 facing the second elastic member 2b. The second protrusion 342 is inserted into and fixed in the second hole 22, thereby fixing the second elastic member 2b and the mover 3 in place. This embodiment not only has a simple structure, but also allows for quick and accurate connection and fixing of the elastic member 2 and the mover 3, further reducing assembly difficulty and improving product yield.
[0053] As an optional implementation, referring to Figure 3, the first elastic member 2a may have two first holes 21, which are spaced apart and symmetrically arranged along the length of the first elastic member 2a. Correspondingly, the first pole core 33 includes two first protrusions 332, which are arranged one-to-one with the first holes 21, and each first protrusion 332 is inserted into and fixed in the corresponding first hole 21. Similarly, referring to Figure 3, the second elastic member 2b has two second holes 22, which are spaced apart and symmetrically arranged along the length of the second elastic member 2b. Correspondingly, the second pole core 34 includes two second protrusions 342, which are arranged one-to-one with the second holes 22, and each second protrusion 342 is inserted into and fixed in the corresponding second hole 22. This implementation can further improve the assembly accuracy between the first elastic member 2a, the second elastic member 2b, and the mover 3, thereby suspending the mover 3 more stably and reliably within the receiving space 111.
[0054] In some embodiments, the first protrusion 332 can be a stepped structure as shown in Figures 2, 3, 6, 7, and 12. It should be noted that in other embodiments, the first protrusion 332 can be a structure of other shapes. For example, the first protrusion 332 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. Similarly, the second protrusion 342 can be a stepped structure as shown in Figures 6, 7, and 12. It should be noted that in other embodiments, the second protrusion 342 can be a structure of other shapes. For example, the second protrusion 342 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 preferred embodiments, referring to Figures 5 and 11, the length of the outer casing 11 in the second direction is greater than its length in the third direction, wherein the second direction is perpendicular to the third direction, and both the second direction and the third direction are perpendicular to the first direction. Furthermore, the second direction is the length direction of the first elastic member 2a and the second elastic member 2b. The first elastic member 2a is fixed at both ends of the outer casing 11 in the second direction, and the second elastic member 2b is fixed at both ends of the outer casing 11 in the second direction, which can effectively improve vibration feedback.
[0056] In some embodiments, referring to Figure 3, 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.
[0057] In some embodiments, referring to FIG8, in order to facilitate the processing of the outer shell 11, the outer shell 11 can be a split structure, and the outer shell 11 is formed by assembling at least two shell parts.
[0058] As an optional implementation, the outer shell 11 can be assembled from a first shell portion 114 and a second shell portion 115, the first shell portion 114 and the second shell portion 115 being centrally symmetrical about the central axis of the outer shell 11. The first shell portion 114 includes a first plate 1141 and a second plate 1142, the second plate 1142 being bent from one end of the first plate 1141. The second shell portion 115 includes a third plate 1151 and a fourth plate 1152, the fourth plate 1152 being bent from one end of the third plate 1151. The end of the first plate 1141 away from the second plate 1142 is fixed to the end of the fourth plate 1152 away from the third plate 1151, and the end of the second plate 1142 away from the first plate 1141 is fixed to the end of the third plate 1151 away from the fourth plate 1152, thereby enclosing and forming a receiving space 111.
[0059] As an example, the first plate 1141 and the fourth plate 1152 can be fixedly connected by welding or other means, and the second plate 1142 and the third plate 1151 can be fixedly connected by welding or other means.
[0060] As an alternative implementation, referring to FIG9, the outer shell 11 can be formed by assembling two third shell portions 116 and two fourth shell portions 117. The two third shell portions 116 are arranged in parallel and spaced apart, and the two fourth shell portions 117 are arranged in parallel and spaced apart. The two third shell portions 116 are connected and fixed by the two fourth shell portions 117 to enclose and form a receiving space 111.
[0061] As an example, the third shell portion 116 and the fourth shell portion 117 can be fixedly connected by welding or other means.
[0062] 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 in that, include: The stator includes a housing having a receiving space and a winding housed within the receiving space, the winding being arranged around a first direction and fixed to the housing; Elastic components; and The mover is connected to the housing via the elastic element at its end in the first direction and suspended within the receiving space. The mover includes a first pole core and a second pole core spaced apart in the first direction, at least two magnets disposed between the first pole core and the second pole core along the first direction, and a third pole core disposed between adjacent magnets. Each magnet is magnetized along the first direction, and the magnetization directions of adjacent magnets are opposite. The mover is at least partially surrounded within the winding.
2. The vibration motor as described in claim 1, characterized in that, The vibration motor includes two elastic elements, namely a first elastic element and a second elastic element. The first elastic element is fixed to one end of the housing along the first direction and connected to one end of the mover. The second elastic element is fixed to the other end of the housing along the first direction and connected to the other end of the mover.
3. The vibration motor as described in claim 2, characterized in that, The stator includes a plurality of windings arranged sequentially along a first direction, wherein the plurality of windings are coaxially arranged and the current directions of two adjacent windings are opposite.
4. The vibration motor as described in claim 3, characterized in that, The number of the third pole cores is the same as the number of the windings, and the windings are wrapped around the corresponding third pole cores.
5. The vibration motor as described in claim 2, characterized in that, The outer shell is a hollow structure with a first opening and a second opening, the first opening and the second opening being arranged opposite to each other in the first direction, and the hollow portion of the outer shell is configured as the receiving space; The first elastic element is disposed corresponding to the first opening. The two ends of the first elastic element are respectively fixed to the outer shell, and the middle part of the first elastic element is fixed to the first pole core. The second elastic element is disposed corresponding to the second opening. The two ends of the second elastic element are respectively fixed to the outer shell, and the middle part of the second elastic element is fixed to the second pole core.
6. The vibration motor as described in claim 5, characterized in that, The first elastic member has a first hole, and the first pole core includes a first body and a first protrusion formed in the first body. The first protrusion is inserted into and fixed to the first hole. The second elastic member has a second hole, and the second pole core includes a second body and a second protrusion formed on the second body. The second protrusion is inserted into and fixed to the second hole.
7. The vibration motor as described in claim 6, characterized in that, The first elastic element has two first holes, which are spaced apart and symmetrically arranged along the length of the first elastic element. The first pole core includes two first protrusions, which are arranged in one-to-one correspondence with the first holes. The second elastic member has two second holes, which are spaced apart and symmetrically arranged along the length of the second elastic member. The second pole core includes two second protrusions, which are arranged in a one-to-one correspondence with the second holes.
8. The vibration motor as described in claim 5, characterized in that, The length of the outer shell in the second direction is greater than the length of the outer shell in the third direction; the second direction is perpendicular to the third direction and is also perpendicular to the first direction. The first elastic member is fixed at both ends of the outer shell in the second direction, and the second elastic member is fixed at both ends of the outer shell in the second direction.
9. The vibration motor as described in claim 1, characterized in that, The outer shell is a single-piece structure or is formed by assembling at least two shell parts.