阅读说明：本技术 振动马达 (Vibration motor ) 是由 王晓萌 张雨晴 高志明 高文花 高全祥 于 2021-09-30 设计创作，主要内容包括：本发明公开一种振动马达,该振动马达具有相交的第一方向和第二方向,振动马达包括壳体、第一振动系统以及第二振动系统,壳体具有相交的第一方向和第二方向；第一振动系统沿第一方向可振动地安装于壳体内,第一振动系统包括振壳和两个磁组,两个磁组均设于振壳内,并分别固定在振壳的两端；第二振动系统沿第二方向可振动地安装于振壳内,第二振动系统包括设于振壳内的框架、安装于框架内的铁芯及环套在铁芯上的线圈；铁芯的两端分别对应两个磁组设置。本发明中在一个单体的振动马达内,利用动圈和动磁两种原理,可获得两套振动系统,避免了重复设置振子和定子,可简化结构设计,降低质量,并减小体积。(The invention discloses a vibration motor, which has a first direction and a second direction which are intersected, and comprises a shell, a first vibration system and a second vibration system, wherein the shell has the first direction and the second direction which are intersected; the first vibration system is arranged in the shell in a vibration mode along a first direction and comprises a vibration shell and two magnetic groups, and the two magnetic groups are arranged in the vibration shell and fixed at two ends of the vibration shell respectively; the second vibration system is arranged in the vibration shell in a vibratile manner along a second direction, and comprises a frame arranged in the vibration shell, an iron core arranged in the frame and a coil sleeved on the iron core in a ring manner; two ends of the iron core are respectively arranged corresponding to the two magnetic groups. In the invention, two sets of vibration systems can be obtained by utilizing two principles of the moving coil and the moving magnet in a single vibration motor, thereby avoiding repeated arrangement of the vibrator and the stator, simplifying the structural design, reducing the mass and reducing the volume.)

1. A vibratory motor having a first direction and a second direction that intersect, the vibratory motor comprising:

a housing;

the first vibration system is arranged in the shell in a vibration mode along the first direction and comprises a vibration shell and two magnetic groups, and the two magnetic groups are arranged in the vibration shell and are respectively fixed at two ends of the vibration shell; and

the second vibration system is arranged in the vibration shell in a vibration mode along the second direction and comprises a frame arranged in the vibration shell, an iron core arranged in the frame and a coil sleeved on the iron core; and two ends of the iron core are respectively arranged corresponding to the two magnetic groups.

2. A vibration motor as claimed in claim 1, wherein said vibration motor further comprises at least two inner resilient pieces, one of said inner resilient pieces being connected to one end of said frame, and the other end thereof being tilted in a direction away from said second vibration system to be connected to said housing; the other inner elastic sheet is connected with the other end of the frame, and the other end of the inner elastic sheet tilts towards the direction departing from the second vibration system and is connected with the shell.

3. A vibration motor as claimed in claim 2, wherein said vibration case includes two first side walls disposed opposite to each other and two second side walls disposed opposite to each other, the two first side walls and the two second side walls enclose a through hole and two first openings, and an extending direction of said through hole is the same as said second direction; the second vibration system is accommodated in the through hole, and the inner elastic sheet penetrates through the first opening.

4. A vibration motor as claimed in claim 3, wherein said vibration shell further comprises a reinforcing plate, said reinforcing plate is connected to said first opening, said reinforcing plate is provided with a hole for avoiding, and said inner elastic sheet is inserted into said hole for avoiding.

5. A vibration motor as claimed in claim 1, wherein said vibration motor further comprises at least two outer resilient pieces, one of said outer resilient pieces being connected to one end of said vibration case, and the other end of said outer resilient piece being tilted in a direction away from said vibration case and connected to said housing; the other outer elastic sheet is connected with the other end of the vibration shell, and the other end of the outer elastic sheet is tilted towards the direction departing from the vibration shell and is connected with the shell.

6. A vibration motor as claimed in claim 1, wherein two of said magnetic groups comprise two magnets, and the two magnets of each of said magnetic groups are disposed oppositely in a diagonal direction of said first direction and said second direction.

7. A vibration motor according to claim 1, wherein said housing includes a main case and two cover plates, said main case penetrating in said second direction to form two second openings; the two cover plates are used for covering the two second openings of the main shell respectively.

8. A vibration motor as claimed in claim 7, wherein said cover plate is provided at a peripheral edge thereof with an elastic bent portion, said cover plate is inserted into said second opening of said main housing, and said elastic bent portion is interposed between said cover plate and a side wall of said main housing.

9. A vibration motor as claimed in claim 8, wherein said elastic bending portion has a U-shaped or multi-segmented bending structure.

10. A vibration motor according to claim 1, wherein said first vibration system further comprises two fixing members fixed to inner end faces of both ends of said vibration housing, respectively; the two magnetic groups are respectively arranged on the two fixing pieces.

Technical Field

The present invention relates to electronic devices, and particularly to a vibration motor.

Background

With the development of technology, various electronic devices are used in the work and life of people. Electromagnetic vibration exciters are increasingly used as core elements of consumer electronic tactile feedback. An electromagnetic vibration exciter is a vibration motor, and with the advancement of technology, a vibration motor capable of realizing bidirectional vibration is available on the market, and the vibration motor generally comprises a stator and a vibrator. The vibrator and the stator form a vibration system.

To transmit more tactile information, dual-frequency bi-directional vibration exciters are increasingly gaining attention. The double-frequency bidirectional vibration exciter is a vibration motor capable of realizing bidirectional vibration. In the related art, a single moving coil or moving magnet structural design is adopted, and when two sets of vibration systems are needed, two vibrators and two stators are needed, so that the product structural design is complex, the weight is large, and the cost is high.

Disclosure of Invention

The invention mainly aims to provide a vibration motor, aiming at simplifying the structural design and reducing the mass.

To achieve the above object, the present invention proposes a vibration motor having a first direction and a second direction intersecting, the vibration motor comprising:

a housing;

the first vibration system is arranged in the shell in a vibration mode along the first direction and comprises a vibration shell and two magnetic groups, and the two magnetic groups are arranged in the vibration shell and are respectively fixed at two ends of the vibration shell; and

the second vibration system is arranged in the vibration shell in a vibration mode along the second direction and comprises a frame arranged in the vibration shell, an iron core arranged in the frame and a coil sleeved on the iron core; and two ends of the iron core are respectively arranged corresponding to the two magnetic groups.

In an embodiment of the invention, the vibration motor further includes at least two inner elastic pieces, one of the inner elastic pieces is connected with one end of the frame, and the other end of the inner elastic piece is tilted in a direction away from the second vibration system and connected with the housing; the other inner elastic sheet is connected with the other end of the frame, and the other end of the inner elastic sheet tilts towards the direction departing from the second vibration system and is connected with the shell.

In an embodiment of the present invention, the vibration shell includes two first side walls disposed opposite to each other and two second side walls disposed opposite to each other, the two first side walls and the two second side walls surround to form a through hole and two first openings, and an extending direction of the through hole is the same as the second direction; the second vibration system is accommodated in the through hole, and the inner elastic sheet penetrates through the first opening.

In an embodiment of the invention, the vibration shell further includes a reinforcing plate, the reinforcing plate is connected to the first opening, the reinforcing plate is provided with a yielding hole, and the inner elastic sheet penetrates through the yielding hole.

In an embodiment of the invention, the vibration motor further includes at least two outer elastic pieces, one of the outer elastic pieces is connected with one end of the vibration shell, and the other end of the outer elastic piece is tilted in a direction away from the vibration shell and connected with the shell; the other outer elastic sheet is connected with the other end of the vibration shell, and the other end of the outer elastic sheet is tilted towards the direction departing from the vibration shell and is connected with the shell.

In an embodiment of the invention, the two magnetic groups include two magnets, and the two magnets of each magnetic group are oppositely arranged along a diagonal direction of the first direction and the second direction.

In an embodiment of the present invention, the housing includes a main housing and two cover plates, the main housing penetrates along the second direction to form two second openings; the two cover plates are used for covering the two second openings of the main shell respectively.

In an embodiment of the invention, an elastic bending portion is disposed on a peripheral edge of the cover plate, the cover plate is inserted into the second opening of the main casing, and the elastic bending portion is sandwiched between the cover plate and a sidewall of the main casing.

In an embodiment of the invention, the elastic bending portion is a U-shaped or multi-segment bending structure.

In an embodiment of the present invention, the first vibration system further includes two fixing members, and the two fixing members are respectively fixed on the inner end surfaces of the two ends of the vibration shell; the two magnetic groups are respectively arranged on the two fixing pieces.

In the technical scheme of the invention, after the coil is charged, the magnetic group in the first vibration system and the iron core in the second vibration system generate interaction force. When the frequency of the input current is the same as or close to the natural frequency of the first vibration system, the first vibration system resonates, producing a vibration excitation in a first direction. The magnetic group sets up in shaking the shell to with shake the shell and be connected, when the magnetic group received the effort of iron core, the magnetic group can be followed first direction vibration, also is that first vibration system is equivalent to the oscillator, and at this moment, the second vibration system is equivalent to the stator. When the frequency of the input current is the same as or close to the natural frequency of the second vibration system, the second vibration system resonates to generate vibration excitation along the second direction, the second vibration system corresponds to a vibrator, and in this case, the first vibration system corresponds to a stator. In the invention, two sets of vibration systems can be obtained by utilizing two principles of the moving coil and the moving magnet in a single vibration motor, thereby avoiding repeated arrangement of the vibrator and the stator, simplifying the structural design, reducing the mass and reducing the volume.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a vibration motor according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of the assembly of the first and second vibratory systems of FIG. 1;

FIG. 3 is a schematic view of the vibrating shell of FIG. 2 with the vibrating shell removed;

FIG. 4 is a schematic view of the second vibration system of FIG. 1 mounted to a housing;

FIG. 5 is a schematic view of the first vibration system and housing of FIG. 1;

FIG. 6 is a schematic structural diagram of a vibration housing of an embodiment of a vibration motor according to the present invention;

FIG. 7 is a schematic structural diagram of a vibration housing of another embodiment of the vibration motor of the present invention;

fig. 8 is a schematic structural view of a housing in a further embodiment of the vibration motor of the present invention;

FIG. 9 is a schematic diagram of the structure of the magnetic assembly of FIG. 1. .

The reference numbers illustrate:

the implementation, functional features and advantages of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a vibration motor which can be applied to an electronic device, wherein the electronic device can be a mobile phone, a tablet personal computer, a handheld game machine, a handheld multimedia entertainment device and other products.

In the embodiment of the present invention, as shown in fig. 1, 2, 3, 4 and 5, the vibration motor has a first direction and a second direction intersecting, and includes a housing 100, a first vibration system 200, and a second vibration system 300.

The first vibration system 200 is vibratably installed in the housing 100 along the first direction, the first vibration system 200 includes a vibration shell 210 and two magnetic groups 220, and the two magnetic groups 220 are both disposed in the vibration shell 210 and respectively fixed at two ends of the vibration shell 210;

the second vibration system 300 is vibratably installed in the vibration shell 210 along the second direction, and the second vibration system 300 includes a frame 310 installed in the vibration shell 210, a core 320 installed in the frame 310, and a coil 330 looped on the core 320; two ends of the iron core 320 are respectively arranged corresponding to the two magnetic groups 220.

The frame 310 may be made of a magnetic conductive material for shielding magnetic lines of force and avoiding mutual interference, and may also make the magnetic lines of force generated by the coil 330 and the iron core 320 more concentrated to promote the interaction force with the magnetic group 220, and the frame 310 may also be made of other materials.

Specifically, the vibration motor has a width direction, a length direction, and a height direction. As shown in fig. 1, the left-right direction is represented as a length direction of the vibration motor; the vertical direction is the height direction of the vibration motor; the front-rear direction is represented as a width direction of the vibration motor. The second direction and the first direction may be any two directions selected from an up-down direction, a left-right direction, and a front-back direction. In the above-described embodiments and the following embodiments, the first direction is mainly used as the up-down direction, and the second direction is mainly used as the front-back direction.

The two magnet groups 220 of the vibration motor each include two magnets 221, and the two magnets 221 of each magnet group 220 are opposite in a diagonal direction where the first direction and the second direction cross. For example, taking one of the magnetic groups 220 as an example, each magnet 221 of the magnetic group 220 has a first side extending along a first direction, a second side connected to the first side and extending along a second direction, and a diagonal side connecting the first side and the second side; the two magnets 221 of the magnetic set 220 are arranged opposite to each other at diagonal edges.

The principle of the vibration motor to realize bidirectional vibration is common, and is briefly summarized as follows:

when an operating frequency is input to the coil 330 of the vibration motor, the vibration motor magnetizes the two magnetic groups 220 along a diagonal angle (45 °) (as shown in fig. 9); at this time, the magnet located on the upper side of one of the magnet groups 220 serves as the N pole, and the magnet located on the lower side serves as the S pole; the magnet on the upper side of the other one of the magnet groups 220 is used as the S pole, and the magnet on the lower side is used as the N pole; the two magnetic groups 220 generate interaction force with the iron core 320, and the interaction force has component forces along the first direction and the second direction. At this time, if the operating frequency of the vibration motor input is identical to the vibration frequency of the first vibration system 200, the entire first vibration system 200 repeatedly vibrates in the first direction, so that the vibration motor generates a vibration sense in the first direction. If the working frequency of the vibration motor input is consistent with the vibration frequency of the second vibration system 300, the second vibration system 300 vibrates repeatedly in the second direction, so that the vibration motor generates a vibration sense in the second direction.

Wherein the first vibration system 200 and the second vibration system 300 have different masses, two different vibration frequencies can be obtained. The vibration of the first vibration system 200 and the vibration of the second vibration system 300 are independent and do not interfere with each other.

In the present invention, after the coil 330 is charged, the magnetic assembly 220 in the first vibration system 200 and the iron core 320 in the second vibration system 300 generate an interaction force. When the frequency of the input current is the same as or close to the natural frequency of the first vibration system 200, the first vibration system 200 resonates, generating a vibration excitation in a first direction. The magnetic assembly 220 is disposed in the vibration shell 210 and connected to the vibration shell 210, and when the magnetic assembly 220 receives the acting force of the iron core 320, the magnetic assembly 220 vibrates along a first direction, that is, the first vibration system 200 is equivalent to a vibrator, and at this time, the second vibration system 300 is equivalent to a stator. When the frequency of the input current is the same as or close to the natural frequency of the second vibration system 300, the second vibration system 300 resonates to generate vibration excitation in the second direction, the second vibration system 300 corresponds to a vibrator, and in this case, the first vibration system 200 corresponds to a stator. In the invention, two sets of vibration systems can be obtained by utilizing two principles of the moving coil and the moving magnet in a single vibration motor, thereby avoiding repeated arrangement of the vibrator and the stator, simplifying the structural design, reducing the mass and reducing the volume.

In an embodiment of the present invention, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the vibration motor further includes at least two inner resilient sheets 400, wherein one of the inner resilient sheets 400 is connected to one end of the frame 310, and the other end thereof is tilted away from the second vibration system 300 and connected to the housing 100; the other inner spring 400 is connected to the other end of the frame 310, and the other end of the inner spring is tilted away from the second vibration system 300 and connected to the housing 100.

Thus, the at least two inner clips 400 cooperate to suspend the second vibration system 300 in the vibration housing 210, so that the second vibration system 300 can provide elastic force to the second vibration system 300 regardless of forward or backward movement of the second vibration system 300, and the second vibration system 300 can vibrate continuously. When the second vibration system 300 vibrates in the second direction, the inner spring 400 is elastically deformed by the force between the second vibration system 300 and the housing 100, thereby providing the second vibration system 300 with an elastic force for linearly guiding and returning to the equilibrium position, so that the second vibration system 300 can continuously vibrate.

It can be understood that, in the present embodiment, two ends of the inner elastic sheet 400 are respectively connected to the second vibration system 300 and the housing 100, and there is no direct connection relationship with the first vibration system 200, that is, when the second vibration system 300 vibrates, the first vibration system 200 is not driven to vibrate, so that when the second vibration system 300 is used as a vibrator, the first vibration system 200 can be used as a stator. Similarly, when the first vibration system 200 vibrates, the second vibration system 300 is not driven to vibrate, so that when the first vibration system 200 is used as a vibrator, the second vibration system 300 can be used as a stator.

In an embodiment of the present invention, as shown in fig. 2 and fig. 6, the vibration shell 210 includes two first sidewalls 211 and two second sidewalls 212, which are oppositely disposed, and the two first sidewalls 211 and the two second sidewalls 212 enclose to form a through hole 210a and two first openings, and an extending direction of the through hole 210a is the same as the second direction; the second vibration system 300 is accommodated in the through hole 210a, and the inner spring 400 is inserted into the first opening.

The two magnetic groups 220 are respectively disposed on the sides of the two first sidewalls 211 facing the through hole 210 a. The magnetic group 220 and the vibrating shell 210 may vibrate synchronously. The first opening is designed to provide a position space for the inner spring 400 to extend from the through hole 210a and to be connected with the housing 100, so that independent vibration of the first vibration system 200 and the second vibration system 300 can be ensured.

In an embodiment of the invention, as shown in fig. 1 and 7, the vibration shell 210 further includes a reinforcing plate 213, the reinforcing plate 213 is connected to the first opening, the reinforcing plate 213 is provided with a yielding hole 213a, and the inner resilient sheet 400 is inserted into the yielding hole 213 a.

It can be understood that by providing the reinforcing plate 213 on the vibration shell 210, the rigidity of the vibration shell 210 can be improved, and further, the second order and higher frequencies of the vibration shell 210 during vibration can be improved, and medium and high frequency noise can be reduced. The provision of the avoiding hole provides a space for the inner resilient piece 400 to extend out from the through hole 210a and connect with the housing 100, so that the first vibration system 200 and the second vibration system 300 can independently vibrate.

In an embodiment of the present invention, as shown in fig. 1, fig. 2 and fig. 5, the vibration motor further includes at least two outer elastic pieces 500, wherein one of the outer elastic pieces 500 is connected to one end of the vibration shell 210, and the other end of the outer elastic piece 500 is tilted in a direction away from the vibration shell 210 and connected to the housing 100; the other outer spring 500 is connected to the other end of the vibration shell 210, and the other end of the outer spring is tilted away from the vibration shell 210 and connected to the housing 100.

It is understood that the outer elastic sheet 500 is disposed on a side of the second sidewall 212 facing away from the through hole 210 a.

The at least two outer clips 500 cooperate to suspend the first vibration system 200 in the housing 100, so that whether the first vibration system 200 moves upwards or downwards, the corresponding outer clips 500 can provide elastic force to the first vibration system 200, so that the first vibration system 200 can vibrate continuously. When the first vibration system 200 vibrates in the first direction, the outer spring 500 is elastically deformed by an acting force between the first vibration system 200 and the housing 100, thereby providing the first vibration system 200 with an elastic force for linearly guiding and returning to the equilibrium position, so that the first vibration system 200 can continuously vibrate.

In an embodiment of the present invention, as shown in fig. 1, the housing 100 includes a main housing 110 and two cover plates 120, wherein the main housing 110 penetrates in the second direction to form two second openings; the two cover plates 120 are respectively used for covering the two second openings of the main housing 110.

It is understood that, when assembling the vibration motor, the first vibration system 200 and the second vibration system 300 may be installed in the main housing 110, and then the two cover plates 120 may cover the two second openings of the main housing 110.

As for the connection and fixation of the cover plate 120 and the main housing 110, various connection methods may be used. For example, the cover plate 120 and the main case 110 are fixed by welding; for another example, the cover plate 120 and the main shell 110 are provided with a snap structure that is engaged with each other, so that the cover plate 120 and the main shell 110 are connected and fixed through the snap structure; for another example, the cover plate 120 may be adhesively fixed to the main housing 110 by using an adhesive material. Of course, in other embodiments, the shell cover plate 120 and the main shell 110 may be fixed by screws. The design can be reasonably designed according to actual production requirements, and no limitation is set herein.

In an embodiment of the present invention, as shown in fig. 8, an elastic bending portion 130 is disposed on a peripheral edge of the cover plate 120, the cover plate 120 is inserted into the second opening of the main casing 110, and the elastic bending portion 130 is sandwiched between the cover plate 120 and a sidewall of the main casing 110.

It can be understood that the periphery of the cover plate 120 presses the inner wall of the main housing 110 by the restoring force generated when the elastic bending part 130 is pressed, so as to generate a large frictional force, thereby integrally connecting the entire housing 100. The process can be simplified, and the assembly and disassembly can be repeated.

In an embodiment of the present invention, as shown in fig. 8, the elastic bending portion 130 is a U-shaped or multi-segment bending structure.

It can be understood that the elastic bending portion 130 is a U-shaped or multi-stage bending structure, and at least one elastic gap can be formed in the elastic bending portion 130, so that the elastic bending portion 130 has a certain flexibility. In the process of fastening the cover plate 120 into the main housing 110 by an external force, the elastic bending portion 130 is pressed, and the restoring force generated when the elastic bending portion 130 is pressed presses the inner wall of the main housing 110 by the periphery of the cover plate 120 to generate a large friction force, so that the entire housing 100 is connected as a whole.

In this embodiment, in order to avoid the stability of the casing in the vibration process of the first vibration system, a connection structure may be additionally provided to reinforce and connect the cover body and the main casing.

Based on any of the above embodiments, in order to fix the magnetic assembly 220, optionally, the first vibration system 200 further includes two fixing members 230, and the two fixing members 230 are respectively fixed on the inner end surfaces of the two ends of the vibration shell 210; the two magnetic assemblies 220 are respectively mounted on the two fixing members 230.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.