Vibration motor

Abstract

The present invention provides a vibrating motor that includes a vibrating assembly and a stator assembly. [Solution] The vibration assembly includes a mass block, a magnetic steel assembly fixed to an inner wall of the mass block, and an elastic member, the magnetic steel assembly including a first magnetic steel assembly fixed to the inner wall along a first direction perpendicular to a vibration direction, the first magnetic steel assembly including a first magnetic permeable plate fixed to the inner wall and a first magnetic steel fixed to one side of the first magnetic permeable plate spaced apart from the inner wall, the magnetic steel assembly further including a second magnetic steel interposed between the inner wall and the first magnetic permeable plate. By installing the first magnetic steel on one side of the first magnetic permeable plate and the second magnetic steel on the other side, the magnetic field performance of the magnetic steel assembly is effectively improved and the driving force of the vibration motor is significantly improved, so that the vibration motor can provide a strong vibration feedback to the user and improve the user experience.

Description

[Technical Field]

[0001] The present invention relates to the technical field of motors, and more particularly to vibration motors used for portable mobile terminals. [Background technology]

[0002] With the development of electronic technology, portable consumer electronic products, such as mobile phones, portable game consoles, navigation devices, and portable multimedia entertainment devices, have attracted more and more attention from people, and these electronic products generally use vibration motors to provide system feedback, such as incoming call notification, message notification, navigation notification for mobile phones, and vibration feedback for game consoles. For such wide applications, vibration motors are required to have high performance and long service life.

[0003] A vibration motor of the related art includes a housing having an accommodation space, a vibration assembly located in the accommodation space, and a stator assembly fixed to the housing. The vibration assembly generally includes a mass block and a magnetic steel member fixed to the mass block, and the stator assembly includes a coil that interacts with the magnetic steel member to provide a driving force. However, in the related art, only a single magnetic steel member is generally installed on one side of the coil, thereby limiting the driving force it can provide. Therefore, if the vibration motor needs to provide strong vibration feedback, such a magnetic steel structure cannot meet the demand.

[0004] Therefore, it is necessary to provide a new vibration motor to solve the above technical problems. Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a vibration motor having excellent magnetic field performance and stronger driving force. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a vibration motor, the vibration motor including a housing having an accommodation space, and a vibration assembly and a stator assembly accommodated in the accommodation space, the vibration assembly including a mass block installed at a distance from the housing, a magnetic steel assembly fixed to the mass block, and an elastic member supporting the mass block within the accommodation space, the mass block having an accommodation hole penetrating the mass block, the mass block having an inner wall formed to surround the accommodation hole, the magnetic steel assembly including: The stator assembly is housed within the accommodating hole and fixed to the inner wall, and includes a coil assembly that is fixed to the housing and a portion of which is housed within the accommodating hole and is installed opposite the magnetic steel assembly, and the magnetic steel assembly includes a first magnetic steel assembly that is fixed to the inner wall along a first direction perpendicular to the vibration direction, and the first magnetic steel assembly includes a first magnetic conductive plate that is fixed to the inner wall and a first magnetic steel that is fixed to one side of the first magnetic conductive plate that is spaced from the inner wall, and the magnetic steel assembly includes a second magnetic steel that is interposed between the inner wall and the first magnetic conductive plate.

[0007] Preferably, the magnetic steel assembly further includes a second magnetic steel assembly fixed to the inner wall along the vibration direction, the second magnetic steel assembly including a second magnetic permeable plate fixed to the inner wall and a third magnetic steel fixed to one side of the second magnetic permeable plate away from the inner wall.

[0008] Preferably, the second magnetic steel assembly further includes a fourth magnetic steel interposed between the second magnetic permeable plate and the inner wall.

[0009] Preferably, the second magnetic steel, the first magnetic permeable plate, and the first magnetic steel are stacked in order on the inner wall along the first direction, and the second magnetic steel, the first magnetic permeable plate, and the first magnetic steel are projected along the first direction so as to completely overlap.

[0010] Preferably, the first magnetic steel has a three-stage magnetization structure, and includes a first magnetized region, a second magnetized region, and a third magnetized region arranged in order along the vibration direction, and the first magnetized region and the third magnetized region have the same magnetization direction and are all magnetized along a direction perpendicular to the vibration direction.

[0011] Preferably, the first magnetic steel has a three-stage magnetization structure, and includes a first magnetization region, a second magnetization region, and a third magnetization region arranged in order along the vibration direction, and the first magnetization region and the third magnetization region have opposite magnetization directions and are all magnetized along the vibration direction.

[0012] Preferably, the magnetic steel assembly includes two sets of the first magnetic steel assemblies, the two sets of first magnetic steel assemblies being respectively installed on both sides of the coil assembly along the first direction, and the first magnetic steels of the two sets of first magnetic steel assemblies being arranged so that the same poles face each other.

[0013] Preferably, the third magnetic steel, the second magnetic permeable plate, and the fourth magnetic steel are projected along the vibration direction so as to completely overlap each other.

[0014] Preferably, the third magnetic steel and the fourth magnetic steel have the same magnetization direction, and are both magnetized along the vibration direction.

[0015] Preferably, the magnetic steel assembly includes two sets of the second magnetic steel assemblies, the two sets of second magnetic steel assemblies being installed on both sides of the vibration direction of the coil assembly, and the third magnetic steel of the two sets of second magnetic steel assemblies being arranged so that the same poles face each other. [Effects of the Invention]

[0016] Compared with the related art, the vibration motor provided by the present invention includes a vibration assembly and a stator assembly, wherein the vibration assembly includes a mass block, a magnetic steel assembly fixed to the mass block, and an elastic member supporting the mass block. The mass block has an accommodating hole formed therethrough, and the mass block has an inner wall surrounding the accommodating hole. The magnetic steel assembly includes a first magnetic steel assembly fixed to the inner wall along a first direction perpendicular to the vibration direction. The first magnetic steel assembly includes a first magnetic permeable plate fixed to the inner wall and a first magnetic steel piece fixed to one side of the first magnetic permeable plate spaced from the inner wall. The magnetic steel assembly includes a second magnetic steel piece interposed between the inner wall and the first magnetic permeable plate. By providing the first magnetic steel piece on one side of the first magnetic permeable plate and the second magnetic steel piece on the other side, the magnetic field performance of the magnetic steel assembly is effectively improved, significantly improving the driving force of the vibration motor. As a result, the vibration motor can provide a stronger vibration feedback to the user, improving the user experience. [Brief explanation of the drawings]

[0017] In order to more clearly explain the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the description of the embodiments. However, the drawings in the following description are only some embodiments of the present invention, and it is obvious that those skilled in the art in the technical field to which the present invention belongs can obtain other drawings based on these drawings without any creative work. [Figure 1] 1 is a perspective view of a vibration motor according to an embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the vibration motor according to the embodiment of the present invention. [Figure 3] 1 is a perspective view of a portion of the structure of a vibration motor according to an embodiment of the present invention. [Figure 4] FIG. 4 is a schematic diagram of the magnetization direction of the magnetic steel assembly of the vibration motor shown in FIG. 3. [Figure 5] FIG. 10 is a perspective view of a portion of the structure of a vibration motor according to another embodiment of the present invention. [Figure 6]FIG. 6 is a schematic diagram of the magnetization direction of the magnetic steel assembly of the vibration motor shown in FIG. 5. [Figure 7] FIG. 6 is a schematic diagram of the magnetization direction of the magnetic steel assembly of the vibration motor shown in FIG. 5. [Figure 8] FIG. 6 is a schematic diagram of the magnetization direction of the magnetic steel assembly of the vibration motor shown in FIG. 5. [Figure 9] FIG. 10 is a perspective view of a portion of the structure of a vibration motor according to another embodiment of the present invention. [Figure 10] FIG. 10 is a schematic diagram of the magnetization direction of the magnetic steel assembly of the vibration motor shown in FIG.

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed description of the preferred embodiments of the present invention will be made in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE INVENTION

[0019] As shown in Figures 1 to 4, an embodiment of the present invention provides a vibration motor 100, which includes a housing 1 having an accommodation space 10, and a vibration assembly 2 and a stator assembly 3 accommodated in the accommodation space 10.

[0020] The housing 1 includes an upper housing 11 having an accommodation space 10 , and a lower housing 12 fixed to the upper housing 11 and formed to surround the upper housing 11 and the accommodation space 10 .

[0021] The vibration assembly 2 includes a mass block 21 installed at a distance from the housing 1, a magnetic steel assembly 22 fixed to the mass block 21, and an elastic member 23 supporting the mass block 21 within the accommodation space 10; specifically, the elastic member 23 is fixed to the upper housing 11, the mass block 21 has an accommodation hole 211 passing through it, the mass block 21 includes an inner wall 212 formed to surround the accommodation hole 211, and the magnetic steel assembly 22 is accommodated within the accommodation hole 211 and fixed to the inner wall 212.

[0022] The stator assembly 3 includes a coil assembly 31 fixed to the housing 1, a portion of which is received in the receiving hole 211 and disposed opposite the magnetic steel assembly 22, and a flexible circuit board 32 electrically connecting the coil assembly 31 to an external circuit. Specifically, the coil assembly 31 includes an iron core 311 fixed to the housing 1 and a coil 312 wound around the iron core 311, and the coil 312 is electrically connected to the flexible circuit board 32. Specifically, both the iron core 311 and the flexible circuit board 32 are fixed to the lower housing 12. The coil 312 is received in the receiving hole 211 and disposed opposite the magnetic steel assembly 22. When the coil 312 is energized, the coil 312 interacts with the magnetic steel assembly 22 to generate a driving force, which causes the elastic member 23 to drive the mass block 21 and the magnetic steel assembly 22 to move along a vibration direction, thereby providing vibration feedback.

[0023] 1 to 3, the magnetic steel assembly 22 includes a first magnetic steel assembly 221 fixed to the inner wall 212 along a first direction perpendicular to the vibration direction, and the first magnetic steel assembly 221 includes a first magnetic permeable plate 2211 fixed to the inner wall 212 and a first magnetic steel 2212 fixed to one side of the first magnetic permeable plate 2211 away from the inner wall 212. In order to improve the magnetic field performance of the magnetic steel assembly 22, in the vibration motor 100 of the present invention, the magnetic steel assembly 22 further includes a second magnetic steel 2213 interposed between the inner wall 212 and the first magnetic permeable plate 2211. The second magnetic steel 2213, the first magnetic permeable plate 2211, and the first magnetic steel 2212 are stacked in order on the inner wall 212 along the first direction, and the second magnetic steel 2213, the first magnetic permeable plate 2211, and the first magnetic steel 2212 completely overlap when projected along the first direction.

[0024] 4 , the first magnetic steel 2212 has a three-stage magnetization structure, including a first magnetized region 2212a, a second magnetized region 2212b, and a third magnetized region 2212c arranged in order along the vibration direction, where the first magnetized region 2212a and the third magnetized region 2212c have the same magnetization direction and are magnetized along a first direction perpendicular to the vibration direction, and the magnetization direction of the second magnetized region 2212b is opposite to that of the first magnetized region 2212a. In this embodiment, the first magnetic steel 2212 and the second magnetic steel 2213 have the same magnetization structure, i.e., the second magnetic steel 2213 also has a three-stage magnetization structure, and the magnetization direction of each segment is the same as that of the first magnetic steel 2212. As can be seen, the magnetic steel assembly 22 includes two sets of the first magnetic steel assemblies 221, each of which is installed on either side of the coil assembly 31 along the first direction, and the first magnetic steel 2212 of the two sets of the first magnetic steel assemblies 221 are installed so that the same poles face each other.

[0025] In a vibration motor provided by another embodiment of the present invention, in order to further enhance the magnetic field performance of the magnetic steel assembly 22, as shown in FIG. 5, the magnetic steel assembly 22 further includes a second magnetic steel assembly 222 fixed to the inner wall 212 in the vibration direction, and the second magnetic steel assembly 222 includes a second magnetic permeable plate 2221 fixed to the inner wall 212 and a third magnetic steel 2222 fixed to one side of the second magnetic permeable plate 2221 away from the inner wall 212. In this embodiment, as shown in FIG. 6, the third magnetic steel 2222 is magnetized in the vibration direction. Similarly, the magnetic steel assembly 22 includes two sets of the second magnetic steel assemblies 222, and the two sets of the second magnetic steel assemblies 222 are respectively installed on both sides of the vibration direction of the coil assembly 31, but the third magnetic steel 2222 of the two sets of the second magnetic steel assemblies 222 are installed so that the same poles face each other.

[0026] Furthermore, the magnetization direction of the first magnetic steel assembly 221 can be designed according to different structures. As shown in FIG. 7, the only difference from FIG. 6 is that the magnetization directions of the first magnetic steel 2212 and the second magnetic steel 2213 are opposite. Also, FIG. 8 shows another magnetization method of the first magnetic steel assembly 221. That is, the first magnetized region 2212a and the third magnetized region 2212c can be installed so that their magnetization directions are opposite and are both magnetized along the vibration direction. In this case, the second magnetized region 2212b is still magnetized along the first direction, that is, the magnetization direction of the second magnetized region 2212b is perpendicular to that of the first magnetized region 2212a. The above only shows some possible magnetization situations of the magnetic steel assembly 22; specific designs can be made according to needs.

[0027] 9 and 10, the only difference between the vibration motor of another embodiment of this invention and the vibration motor of FIG. 5 is that the second magnetic steel assembly 222 further includes a fourth magnetic steel 2223 interposed between the second magnetic permeable plate 2221 and the inner wall 212. Specifically, the third magnetic steel 2222, the second magnetic permeable plate 2221, and the fourth magnetic steel 2223 are projected in the vibration direction and completely overlap each other. The fourth magnetic steel 2223 and the third magnetic steel 2222 have the same magnetization direction and are both magnetized in the vibration direction.

[0028] Compared with the related art, the vibration motor provided by the present invention includes a vibration assembly and a stator assembly, wherein the vibration assembly includes a mass block, a magnetic steel assembly fixed to the mass block, and an elastic member supporting the mass block. The mass block has an accommodating hole formed therethrough, and the mass block has an inner wall formed to surround the accommodating hole. The magnetic steel assembly includes a first magnetic steel assembly fixed to the inner wall along a first direction perpendicular to the vibration direction. The first magnetic steel assembly includes a first magnetic permeable plate fixed to the inner wall and a first magnetic steel piece fixed to one side of the first magnetic permeable plate spaced from the inner wall. The magnetic steel assembly further includes a second magnetic steel piece interposed between the inner wall and the first magnetic permeable plate. By providing the first magnetic steel piece on one side of the first magnetic permeable plate and the second magnetic steel piece on the other side, the magnetic field performance of the magnetic steel assembly is effectively improved, significantly improving the driving force of the vibration motor. As a result, the vibration motor can provide a strong vibration feedback to the user, improving the user experience.

[0029] The above is only an embodiment of the present invention, and various modifications may be made by those skilled in the art to which the present invention pertains without departing from the creative concept of the present invention, and it should be understood that all of these modifications fall within the scope of the present invention.

Claims

1. A vibration motor, a housing having an accommodation space, and a vibration assembly and a stator assembly accommodated in the accommodation space; the vibration assembly includes a mass block spaced apart from the housing, a magnetic steel assembly fixed to the mass block, and an elastic member supporting the mass block within the accommodation space; The mass block is provided with a receiving hole penetrating the mass block, the mass block includes an inner wall formed to surround the receiving hole, the magnetic steel assembly is accommodated in the accommodation hole and fixed to the inner wall; the stator assembly includes a coil assembly fixed to the housing, a portion of which is housed in the housing hole, and which is disposed opposite the magnetic steel assembly; the magnetic steel assembly includes a first magnetic steel assembly fixed to the inner wall along a first direction perpendicular to the vibration direction; the first magnetic steel assembly includes a first magnetic permeable plate fixed to the inner wall, and a first magnetic steel fixed to one side of the first magnetic permeable plate away from the inner wall, the magnetic steel assembly further includes a second magnetic steel interposed between the inner wall and the first magnetic permeable plate; The first magnetic steel has a three-stage magnetization structure, and the first magnetic steel includes a first magnetized region, a second magnetized region, and a third magnetized region that are arranged in order along the vibration direction, and the first magnetized region and the third magnetized region have the same magnetization direction and are all magnetized along a direction perpendicular to the vibration direction; or Or, the first magnetic steel has a three-stage magnetization structure, and the first magnetic steel includes a first magnetized region, a second magnetized region, and a third magnetized region that are arranged in order along the vibration direction, the first magnetized region and the third magnetized region have opposite magnetization directions and are all magnetized along the vibration direction; the second magnetic steel, the first magnetic permeable plate, and the first magnetic steel are stacked in order on the inner wall along the first direction, and the coil assembly is provided facing the first magnetic steel assembly in the first direction; the magnetic steel assembly further includes a second magnetic steel assembly fixed to the inner wall along the vibration direction, the second magnetic steel assembly including a second magnetic permeable plate fixed to the inner wall, and a third magnetic steel plate fixed to one side of the second magnetic permeable plate away from the inner wall; the second magnetic steel assembly further includes a fourth magnetic steel interposed between the second magnetic permeable plate and the inner wall; A vibration motor, characterized in that a projection of the second magnetic steel assembly in the first direction does not overlap a projection of the first magnetic steel assembly in the first direction.

2. 2. The vibration motor according to claim 1, wherein the second magnetic steel, the first magnetic permeable plate, and the first magnetic steel are stacked in order on the inner wall along the first direction, and projections of the second magnetic steel, the first magnetic permeable plate, and the first magnetic steel along the first direction completely overlap.

3. 2. The vibration motor according to claim 1, wherein the magnetic steel assembly includes two sets of the first magnetic steel assemblies, the two sets of the first magnetic steel assemblies being respectively installed on both sides of the coil assembly along the first direction, and the first magnetic steels of the two sets of the first magnetic steel assemblies being arranged so that the same poles face each other.

4. The vibration motor according to claim 1 , wherein the third magnetic steel, the second magnetic permeable plate, and the fourth magnetic steel are projected in a vibration direction so as to completely overlap each other.

5. 5. The vibration motor according to claim 4, wherein the third magnetic steel and the fourth magnetic steel have the same magnetization direction and are both magnetized along the vibration direction.

6. 6. The vibration motor according to claim 5, wherein the magnetic steel assembly includes two sets of the second magnetic steel assemblies, the two sets of the second magnetic steel assemblies being respectively installed on both sides along the vibration direction of the coil assembly, and the third magnetic steels of the two sets of the second magnetic steel assemblies being arranged so that the same poles face each other.

Images