Vibration motor

Abstract

The invention provides a vibration motor, comprising a stator comprising a housing with an accommodating space and two driving assemblies accommodated in the accommodating space, the two driving assemblies being symmetrically arranged at two ends of the housing in a first direction, each driving assembly comprises an iron core fixed to the shell and a winding arranged around the first direction and arranged on the periphery of the iron core in a winding mode, and the current directions of the windings of the two driving assemblies are the same. An elastic member; the end, in the second direction, of the rotor is connected to the shell through an elastic piece and suspended in the containing space, the second direction is perpendicular to the first direction, the rotor comprises a magnetic steel part located between the two driving assemblies, and the magnetic steel part is magnetized in the first direction and comprises two sections of parts opposite in magnetizing direction. And when periodic current is introduced into the winding, the stator generates periodic electromagnetic force on the rotor so as to drive the rotor to vibrate along the second direction. The vibration motor is simple in structure, small in size and easy to assemble, and production cost and production requirements are reduced.

Description

Technical Field

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

[0002] In the prior art, the most common vibration device is the X-axis linear motor, which is not only large in size but also complex in structure, complicated to assemble, and expensive, making it difficult to use in some applications that require both cost and performance.

[0003] Therefore, it is necessary to provide a vibration motor with small size, simple structure and easy assembly. Summary of the Invention

[0004] The object of the present invention is to provide a vibration motor to solve the technical problems in the prior art of vibration components being large in size, complex in structure and complicated in assembly.

[0005] The technical solutions of the present invention are as follows: The present invention provides a vibration motor, comprising: The stator comprises a housing having a receiving space and two drive assemblies received in the receiving space, the two drive assemblies being symmetrically disposed at both ends of the housing in a first direction, each drive assembly comprising an iron core fixed to the housing and a winding disposed in the first direction and wound around the outer circumference of the iron core, the current directions of the windings of the two drive assemblies being the same; elastic member; and a mover, wherein an end portion of the mover in a second direction is connected to the housing via the elastic member and is suspended in the receiving space, the second direction being perpendicular to the first direction, the mover comprising a magnetic steel portion located between the two driving assemblies, the magnetic steel portion being magnetized along the first direction and comprising two portions having opposite magnetization directions; When a periodic current flows into the winding, the stator generates a periodic electromagnetic force on the mover to drive the mover to vibrate along the second direction.

[0006] Preferably, the vibration motor includes two elastic members; The mover also includes two pole cores, which are symmetrically fixed to the two ends of the magnetic steel part in the second direction, one of the pole cores is connected to the shell through one of the elastic members, and the other pole core is connected to the shell through the other elastic member.

[0007] Preferably, the housing is a hollow structure having two openings, the two openings are arranged opposite to each other in the second direction, and the hollow portion of the housing is configured as the receiving space; The elastic members are arranged in a one-to-one correspondence with the openings, and the two ends of the elastic members in the third direction are respectively fixed to the shell so that each elastic member is respectively arranged across the corresponding opening, wherein the third direction is perpendicular to the first direction and the second direction.

[0008] Preferably, the elastic member is provided with a through hole; The pole core includes a body and a convex portion protruding from the body, and the convex portion is inserted into the corresponding through hole.

[0009] Preferably, the elastic member is provided with two through holes spaced apart and symmetrically arranged in the third direction; The pole core includes two protrusions spaced apart and symmetrically arranged in the third direction, and the protrusions are arranged in a one-to-one correspondence with the through holes.

[0010] Preferably, the magnetic steel portion is integrally magnetized.

[0011] Preferably, the magnetic steel portion further includes a non-magnetic region located between the two portions with opposite magnetization directions.

[0012] Preferably, the magnetic steel portion includes a first magnetic steel and a second magnetic steel, the first magnetic steel and the second magnetic steel have opposite magnetization directions, and the first magnetic steel and the second magnetic steel are bonded together to form the magnetic steel portion.

[0013] Preferably, the housing is an integral structure; Or the housing is formed by assembling at least two shell parts.

[0014] Preferably, the iron core is formed by stacking multiple layers of iron sheets.

[0015] The beneficial effects of the present invention are as follows: the vibration motor of the present invention includes a mover, a stator, and an elastic member. The stator includes a housing having a receiving space and two drive assemblies received in the receiving space. The two drive assemblies are symmetrically arranged at both ends of the housing in a first direction. Each drive assembly includes an iron core fixed to the housing and a winding arranged around the first direction and wound around the outer circumference of the iron core. The end of the mover in the second direction is connected to the housing via an elastic member and suspended in the receiving space. The mover includes a magnetic steel portion located between the two drive assemblies. Not only is the structure simple, the volume is small, and the assembly is easy, which reduces production requirements and production costs, but also the space utilization rate is high, and a more powerful vibration experience can be provided in a smaller volume. The current directions of the windings of the two drive assemblies are the same. The magnetic steel portion is magnetized in the first direction and includes two sections with opposite magnetization directions. When current is passed through the windings, the windings are subjected to an Ampere force and the iron core is subjected to an electromagnetic force, thereby generating an electromagnetic force on the mover. When periodic current is passed through the windings of the two drive assemblies, the stator generates a periodic electromagnetic force on the mover, thereby driving the mover to vibrate in the second direction, resulting in a fast response and a more realistic vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of the vibration motor of the present invention.

[0017] Figure 2 for Figure 1 The partial structural diagram of the vibration motor shown in FIG.

[0018] Figure 3 for Figure 1 The vibration motor is shown in front view.

[0019] Figure 4 for Figure 3 Schematic diagram of the excitation of the AA section.

[0020] Figure 5 for Figure 1 Exploded view of the vibration motor shown.

[0021] Figure 6 for Figure 1 Schematic diagram of the stator structure in the vibration motor shown.

[0022] Figure 7 for Figure 1 The schematic diagram of the mover structure in the vibration motor is shown.

[0023] Figure 8 for Figure 1 The first structural diagram of the magnetic steel part in the vibration motor is shown.

[0024] Figure 9 for Figure 1 The second structural diagram of the magnetic steel part in the vibration motor is shown.

[0025] Figure 10 for Figure 1 The third structural diagram of the magnetic steel part in the vibration motor is shown.

[0026] Figure 11 for Figure 1 The first structural exploded view of the housing in the vibration motor is shown.

[0027] Figure 12 for Figure 1 The second structural exploded view of the housing in the vibration motor is shown.

[0028] Among them: 1-stator (11-housing (111-accommodation space, 112-opening, 113-first shell (1131-first plate, 1132-second plate), 114-second shell, 115-third shell), 12-driving assembly (121-iron core, 122-winding)), 2-elastic member (21-through hole), 3-mover (31-magnetic steel part (311-first magnetic steel, 312-second magnetic steel, 313-non-magnetic area), 32-pole core (321-main body, 322-convex part)). DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] The embodiment of the present invention provides a vibration motor, comprising a stator 1, an elastic member 2 and a mover 3, please refer to Figures 1 to 6 . The stator 1 includes a housing 11 and two drive components 12. The housing 11 has a receiving space 111. The two drive components 12 are received in the receiving space 111, and the two drive components 12 are symmetrically arranged at both ends of the housing 11 in the first direction. Each drive component 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 first direction and wound around the outer circumference of the iron core 121. The current directions of the windings 122 of the two drive components 12 are the same. The end of the mover 3 in the second direction is connected to the housing 11 through the elastic member 2, so that the mover 3 is suspended in the receiving space 111 through the elastic member 2. The mover 3 includes a magnetic steel portion 31, and the magnetic steel portion 31 is located between the two drive components 12. The magnetic steel portion 31 is magnetized along the first direction, and the magnetic steel portion 31 includes two sections with opposite magnetization directions. Please refer to Figures 8 to 10 Wherein, the second direction is perpendicular to the first direction.

[0031] The vibration motor of the embodiment of the present invention includes a mover 3, a stator 1 and an elastic member 2. The stator 1 includes a shell 11 with a receiving space 111 and two drive components 12 received in the receiving space 111. The two drive components 12 are symmetrically arranged at both ends of the shell 11 in the first direction. Each drive component 12 includes an iron core 121 fixed to the shell 11 and a winding 122 arranged around the first direction and wound around the outer periphery of the iron core 121. The end of the mover 3 in the second direction is connected to the shell 11 through the elastic member 2 and suspended in the receiving space 111. The mover 3 includes a magnetic steel part 31 located between the two drive components 12. The vibration motor of the embodiment of the present invention is not only simple in structure and low in production cost, but also easy to assemble, which reduces production requirements and production costs. In addition, the vibration motor of the embodiment of the present invention is small in size and high in space utilization, and can provide a stronger vibration experience in a smaller volume.

[0032] In the vibration motor of the embodiment of the present invention, the current directions of the windings 122 of the two driving components 12 are the same, the magnetic steel portion 31 is magnetized along the first direction, and the magnetic steel portion 31 includes two sections 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 driving 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, with fast response and more realistic vibration.

[0033] As an example, please refer to Figure 4 ,exist Figure 4 Under the excitation of the direction shown, the core 121 in the stator 1 is subjected to electromagnetic force, the winding 122 is subjected to Ampere force, and the overall resultant force is upward, so that the mover 3 is subjected to a resultant force F in the downward direction. It can be understood that when the winding 122 is connected to the Figure 4 When the direction of the current is opposite to the current shown, the resultant force F on the mover 3 is in the upward direction. When a periodic current flows through the winding 122, the stator 1 generates 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. This not only has a small size, a simple structure, and is easy to assemble, but also provides a stronger vibration experience in a smaller size, making the vibration feel more realistic.

[0034] The vibration motor of the embodiment of the present invention can be applied to side keys, touch screens, vehicles or other related fields.

[0035] As an example, the second direction may be the Z direction, and the vibration motor in the embodiment of the present invention may be a Z-axis linear motor.

[0036] As an optional embodiment, the housing 11 and the iron core 121 may be made of a strong magnetic conductive material.

[0037] As an optional embodiment, the winding 122 can be first wound around the outer circumference of the iron core 121, and then the iron core 121 is fixedly connected to the side wall of the housing 11. The windings 122 of the two drive assemblies 12 can be connected in series, or the windings 122 of the two drive assemblies 12 can be connected in parallel.

[0038] In some preferred embodiments, please refer to Figures 3 to 5 As shown, the vibration motor includes two elastic members 2, and the mover 3 also includes two pole cores 32. One pole core 32 is fixed to one end of the magnetic steel portion 31 in the second direction and is connected to one end of the housing 11 in the second direction via one elastic member 2. The other pole core 32 is fixed to the other end of the magnetic steel portion 31 in the second direction and is connected to the other end of the housing 11 in the second direction via another elastic member 2. Furthermore, the two pole cores 32 are arranged symmetrically with respect to the magnetic steel portion 31.

[0039] In this embodiment, the two pole cores 32 are symmetrically fixed to the two ends of the magnetic steel portion 31 in the second direction, which can reduce magnetic circuit leakage and achieve a high-efficiency magnetic field.

[0040] In some preferred embodiments, please refer to Figure 4 The housing 11 is a hollow structure with two openings 112. The two openings 112 of the housing 11 are arranged opposite to each other in the second direction, and the hollow portion of the housing 11 is constructed as a receiving space 111. The elastic member 2 is arranged in a one-to-one correspondence with the opening 112. Please refer to Figure 1 Each elastic member 2 is fixed to the housing 11 at both ends in the third direction, so that each elastic member 2 is respectively arranged across the corresponding opening 112, which can reliably and effectively suspend the mover 3 in the receiving space 111. Moreover, the third direction is perpendicular to the first direction and the second direction, and the two opposite ends of the elastic member 2 in the third direction are respectively fixed to the housing 11, and the two driving components 12 are symmetrically arranged at both ends of the housing 11 in the first direction, which can effectively enhance the vibration feeling.

[0041] In some preferred embodiments, please refer to Figure 5 The elastic member 2 can be a spring, and each elastic member 2 is provided with a through hole 21. The pole core 32 includes a body 321 and a protrusion 322. The protrusion 322 is protruded from the body 321, and the protrusions 322 are arranged one-to-one with the through holes 21. The protrusions 322 can be inserted into the corresponding through holes 21, thereby quickly and accurately installing the elastic member 2 and the mover 3.

[0042] As an example, the two ends of each elastic member 2 in the third direction are respectively fixed to the end surface of the shell 11 in the second direction, and the middle part of the elastic member 2 is fixedly connected to the protrusion 322 of the pole core 32. The structure is simple and easy to assemble.

[0043] As an optional implementation, please refer to Figure 5 Each elastic member 2 defines two through-holes 21, spaced apart and symmetrically arranged in a third direction perpendicular to the first and second directions. Accordingly, each pole core 32 includes two protrusions 322, spaced apart and symmetrically arranged in the third direction. 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.

[0044] In some embodiments, the protrusion 322 may be Figure 7 It should be noted that, in other embodiments, the convex portion 322 can be a structure of other shapes. For example, the convex portion 322 can be a cylinder or a square or any other convex shape, which can be set according to actual conditions and will not be described in detail here.

[0045] In some embodiments, the magnetic steel portion 31 may be integrally magnetized. Figure 8 and Figure 9 .

[0046] As an optional implementation, please refer to Figure 8 The magnetic steel portion 31 may further include a non-magnetic region 313 , and the non-magnetic region 313 is located between the two portions with opposite magnetization directions.

[0047] As an optional implementation, please refer to Figure 9 , the magnetic steel portion 31 may not have a non-magnetic area.

[0048] In some embodiments, the magnetic steel portion 31 can be split magnetized, and the magnetic steel portion 31 can include a first magnetic steel 311 and a second magnetic steel 312. The magnetization directions of the first magnetic steel 311 and the second magnetic steel 312 are opposite. Please refer to Figure 10 As an example, the magnetic steel portion 31 may be formed by bonding a first magnetic steel 311 and a second magnetic steel 312 .

[0049] In some embodiments, see Figure 5 The housing 11 can be an integrated structure, which further reduces the assembly process of the vibration motor and makes it easier to assemble.

[0050] In some other embodiments, in order to facilitate the processing of the housing 11 , the housing 11 may be a split structure, and the housing 1 may be formed by assembling at least two shell parts.

[0051] As an implementation, please refer to Figure 11 The housing 11 can be formed by assembling two first housing parts 113. The two first housing parts 113 are centrally symmetrically arranged about the central axis of the housing 11. Each first housing part 113 includes a first plate 1131 and a second plate 1132 bent from one end of the first plate 1131. The end of the first plate 1131 of one of the first housing parts 113, which is away from the second plate 1132, is fixed to the second plate 1132 of the other first housing part 113. The end of the second plate 1132 of the first housing part 113, which is away from the first plate 1131, is fixed to the first plate 1131 of the other first housing part 113, thereby enclosing and forming the receiving space 111.

[0052] As an example, the two first shell parts 113 can be fixedly connected by welding or other methods.

[0053] As an implementation, please refer to Figure 12The housing 11 can be formed by assembling two second shell parts 114 and two third shell parts 115. The two second shell parts 114 are spaced apart and symmetrically arranged, and the two third shell parts 115 are spaced apart and symmetrically arranged. The two second shell parts 114 are connected by the two third shell parts 115 to enclose and form a receiving space 111.

[0054] As an example, the second shell portion 114 and the third shell portion 115 may be fixedly connected by welding or the like.

[0055] In some embodiments, the iron core 121 may be formed by laminating multiple layers of iron sheets to reduce eddy current loss. It should be noted that in other embodiments, the iron core 121 may also be an integrated structure, which may be configured according to actual conditions and will not be described in detail here.

[0056] The above description is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. A vibration motor, characterized in that: include: The stator comprises a housing having a receiving space and two drive components received in the receiving space, wherein the two drive components are symmetrically arranged at two ends of the housing in a first direction, each of the drive components comprises 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, and the current directions of the windings of the two drive components are the same; elastic member; and A mover, wherein the end of the mover in the second direction is connected to the housing through the elastic member and suspended in the receiving space, the second direction is perpendicular to the first direction, the mover comprises a magnetic steel portion located between the two driving components, the magnetic steel portion is magnetized along the first direction, and comprises two portions with opposite magnetization directions; When a periodic current is passed through the winding, the stator generates a periodic electromagnetic force on the mover to drive the mover to vibrate along the second direction.

2. The vibration motor according to claim 1, wherein: The vibration motor includes two elastic members; The mover also includes two pole cores, which are symmetrically fixed to the two ends of the magnetic steel part in the second direction, one of the pole cores is connected to the shell through one of the elastic members, and the other pole core is connected to the shell through the other elastic member.

3. The vibration motor according to claim 2, characterized in that The shell is a hollow structure with two openings, the two openings are arranged opposite to each other in the second direction, and the hollow part of the shell is configured as the receiving space; The elastic members are arranged in one-to-one correspondence with the openings, and the two ends of the elastic members in the third direction are respectively fixed to the shell so that each elastic member is respectively arranged across the corresponding opening, wherein the third direction is perpendicular to the first direction and the second direction.

4. The vibration motor according to claim 3, characterized in that The elastic member is provided with a through hole; The pole core comprises a body and a convex portion protruding from the body, and the convex portion is inserted into the corresponding through hole.

5. The vibration motor according to claim 4, characterized in that The elastic member is provided with two through holes spaced apart and symmetrically arranged in the third direction; The pole core includes two protrusions 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 vibration motor according to claim 1, wherein: The magnetic steel part is integrally magnetized.

7. The vibration motor according to claim 6, characterized in that The magnetic steel portion further includes a non-magnetic region located between the two portions with opposite magnetization directions.

8. The vibration motor according to claim 1, wherein: The magnetic steel portion includes a first magnetic steel and a second magnetic steel. The first magnetic steel and the second magnetic steel have opposite magnetization directions. The first magnetic steel and the second magnetic steel are bonded to form the magnetic steel portion.

9. The vibration motor according to claim 1, wherein: The housing is an integrated structure; Or the housing is formed by assembling at least two shell parts.

10. The vibration motor according to claim 1, wherein The iron core is formed by stacking multiple layers of iron sheets.

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