Vibration motor

Abstract

The invention provides a vibration motor, comprising: a stator comprising a housing having an accommodating space and a winding accommodated in the accommodating space, the winding being arranged around a first direction and fixed to the housing; an elastic member; the end part of the rotor in the first direction is connected to the shell through an elastic piece and is suspended in the accommodating space, and the rotor comprises a first pole core and a second pole core which are arranged in the first direction at an interval, at least two magnetic steels arranged between the first pole core and the second pole core along the first direction, and third pole cores arranged between adjacent magnetic steels; each piece of magnetic steel is magnetized in the first direction, the magnetizing directions of the adjacent pieces of magnetic steel are opposite, and at least part of the rotor is wound in the winding. The vibration sensor is simple in structure, easy to assemble, small in size, high in space utilization rate and capable of providing great vibration sense under the small size.

Description

Technical Field

[0001] The 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 an X-axis linear motor, which is not only large in size, but also complex in structure, complicated in assembly, and high in cost, and is difficult to be used in some occasions that require high 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 that the vibration device is large in size, complex in structure and complicated in assembly.

[0005] The technical solution of the present invention is as follows: The present invention provides a vibration motor, comprising: The stator comprises a housing having a receiving space, and a winding received in the receiving space, wherein the winding is arranged around a first direction and fixed to the housing; elastic member; and A mover, whose end in the first direction is connected to the housing through the elastic member and suspended in the accommodating space, comprises a first pole core and a second pole core spaced apart in the first direction, at least two magnetic steels arranged between the first pole core and the second pole core along the first direction, and a third pole core arranged between adjacent magnetic steels, each of the magnetic steels is magnetized along the first direction, and the magnetization directions of adjacent magnetic steels are opposite, and the mover is at least partially surrounded by the winding.

[0006] Preferably, the vibration motor includes two elastic members, which are respectively a first elastic member and a second elastic member, the first elastic member being fixed to one end of the housing along the first direction and connected to one end of the mover, and the second elastic member being fixed to the other end of the housing along the first direction and connected to the other end of the mover.

[0007] Preferably, the stator comprises a plurality of windings arranged in sequence along a first direction, the plurality of windings are coaxially arranged and current directions of two adjacent windings are opposite.

[0008] 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.

[0009] Preferably, the housing is a hollow structure having a first opening and a second opening, the first opening and the second opening are arranged opposite to each other in the first direction, and the hollow portion of the housing is configured as the receiving space; The first elastic member is arranged corresponding to the first opening, the two ends of the first elastic member are respectively fixed to the shell, and the middle part of the first elastic member is fixed to the first pole core; the second elastic member is arranged corresponding to the second opening, the two ends of the second elastic member are respectively fixed to the shell, and the middle part of the second elastic member is fixed to the second pole core.

[0010] Preferably, a first hole is formed on the first elastic member, the first pole core comprises a first body and a first protrusion formed on the first body, and the first protrusion is inserted and fixed in the first hole; The second elastic member is provided with a second hole, the second pole core comprises a second body and a second protrusion formed on the second body, and the second protrusion is inserted into and fixed to the second hole.

[0011] Preferably, the first elastic member is provided with two first holes, the two first holes are spaced apart and symmetrically arranged in the length direction of the first elastic member, the first pole core comprises two first convex bodies, and the first convex bodies are arranged in one-to-one correspondence with the first holes; The second elastic member has two second holes formed therein, the two second holes are spaced apart and symmetrically arranged in the length direction of the second elastic member, and the second pole core includes two second protrusions, the second protrusions are arranged in one-to-one correspondence with the second holes.

[0012] Preferably, the length of the shell in the second direction is greater than the length of the shell in the third direction; the second direction is perpendicular to the third direction and perpendicular to the first direction; Two ends of the first elastic member in the second direction are respectively fixed to two ends of the housing in the second direction, and two ends of the second elastic member in the second direction are respectively fixed to two ends of the housing in the second direction.

[0013] Preferably, the shell is an integral structure or is formed by assembling at least two shell parts. The beneficial effect of the present invention is that the vibration motor of the present invention comprises a stator, a shell having a receiving space, and a winding received in the receiving space, the winding is arranged around the first direction and fixed to the shell; an elastic member; and a mover, the end of which in the first direction is connected to the shell by the elastic member and suspended in the receiving space, the mover comprises a first pole core and a second pole core arranged at intervals in the first direction, at least two magnetic steels arranged between the first pole core and the second pole core along the first direction, and a third pole core arranged between adjacent magnetic steels, each magnetic steel is magnetized along the first direction, and the magnetization directions of adjacent magnetic steels are opposite, the mover is at least partially surrounded by the winding, not only has a simple structure, a small volume, is easy to assemble, reduces production requirements and production costs, but also has a high space utilization rate, and can provide a great vibration sense in a small volume; when a periodic current is passed through the winding, the stator will generate a periodic electromagnetic force on the mover, and this electromagnetic force acts as an excitation source to drive the mover to vibrate along the first direction, with a fast response and a more realistic vibration sense. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a vibration motor provided by the present invention.

[0015] Figure 2 for Figure 1 Schematic diagram of the partial structure of the vibration motor shown.

[0016] Figure 3 for Figure 1 Exploded view of the vibration motor shown.

[0017] Figure 4 for Figure 1 Schematic diagram of the stator structure in the vibration motor shown.

[0018] Figure 5 for Figure 1 A top view of the vibration motor is shown.

[0019] Figure 6 for Figure 5 Schematic diagram of the excitation of the AA section.

[0020] Figure 7 for Figure 1 Schematic diagram of another magnetizing direction of the mover in the vibration motor shown.

[0021] Figure 8 for Figure 1 An exploded view of the first structure of the housing in the vibration motor is shown.

[0022] Fig. 9 for Figure 1 The second structural exploded view of the housing in the vibration motor is shown.

[0023] Fig.10 A schematic structural diagram of another vibration motor provided by the present invention.

[0024] Fig.11 for Fig.10 A top view of the vibration motor is shown.

[0025] Fig.12 for Fig.11 Schematic diagram of the excitation of the BB section.

[0026] Among them: 1-stator (11-housing (111-accommodating space, 112-first opening, 113-second opening, 114-first shell (1141-first plate, 1142-second plate), 115-second shell (1151-third plate, 1152-fourth plate), 116-third shell, 117-fourth shell), 12-winding), 2-elastic member (2a-first elastic member, 2b-second elastic member, 21-first hole, 22-second hole), 3-mover (31-magnetic steel, 33-first pole core (331-first body, 332-first convex body), 34-second pole core (341-second body, 342-second convex body), 35-third pole core). DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0028] Please refer to Figures 1 to 6 The embodiment of the present invention provides a vibration motor, comprising a stator 1, an elastic member 2 and a mover 3. The stator 1 comprises a housing 11 and a winding 12, the housing 11 has a receiving space 111, the winding 12 is received in the receiving space 111 and fixed to the housing 11, and the winding 12 is arranged around the first direction. The end of the mover 3 in the first direction is connected to the housing 11 through the elastic member 2 and suspended in the receiving space 111. The mover 3 comprises at least two magnetic steels 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 arranged at intervals in the first direction, all the magnetic steels 31 are arranged at intervals along the first direction and are arranged between the first pole core 33 and the second pole core 34, each magnetic steel 31 is magnetized along the first direction, and the magnetization directions of the adjacent two magnetic steels 31 are opposite, the third pole core 35 is arranged between the adjacent two magnetic steels 31, the mover 3 is at least partially surrounded by the winding 12, and there is a gap between the mover 3 and the winding 12.

[0029] The vibration motor of the embodiment of the present invention comprises a stator 1, an elastic member 2 and a mover 3. The stator 1 comprises a housing 11 having a receiving space 111, and a winding 12 received in the receiving space 111. The winding 12 is arranged around the first direction and fixed to the housing 11. The end of the mover 3 in the first direction is connected to the housing 11 through the elastic member 2 and suspended in the receiving space 111. The mover 3 comprises a first pole core 33 and a second pole core 34 arranged at intervals in the first direction, at least two magnetic steels 31 arranged between the first pole core 33 and the second pole core 34 along the first direction, and a third pole core 35 arranged between two adjacent magnetic steels 31. Each magnetic steel 31 is magnetized along the first direction, and the magnetization directions of the two adjacent magnetic steels are opposite. The mover 3 is at least partially surrounded by the winding 12, and there is a gap between the mover 3 and the winding 12. The vibration motor of the embodiment of the present invention has a simple structure, low production cost, and a simple and easy assembly process, which further reduces production requirements and production costs. The vibration motor of the embodiment of the present invention has a small size and high space utilization, and can provide a great vibration sensation in a relatively small size.

[0030] In the vibration motor of the embodiment of the present invention, 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, with a fast response and a more realistic vibration feeling.

[0031] The vibration motor of the embodiment of the present invention can be applied to side keys, touch screens, vehicles or other related fields.

[0032] As an example, the first direction may be a Z direction, and the vibration motor in the embodiment of the present invention may be a Z-axis linear motor.

[0033] In some embodiments, the vibration motor includes two elastic members 2, the two elastic members 2 are respectively a first elastic member 2a and a second elastic member 2b. The first elastic member 2a is fixed to one end of the housing 11 along the first direction and connected to one end of the mover 3, and the second elastic member 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, so that the mover 3 is reliably and effectively suspended in the receiving space 111.

[0034] In some embodiments, the winding 12 may be bonded and fixed to the housing 11, or the winding 12 may be fixedly connected to the housing 11 via other structures such as a frame. This may be configured according to actual conditions and will not be described in detail herein.

[0035] In some embodiments, please refer to Figures 1 to 6, the stator 1 may include a winding 12. Accordingly, the mover 3 includes a first pole core 33, a second pole core 34, a third pole core 35 and two magnetic steels 31, and the first pole core 33, one of the magnetic steels 31, the third pole core 35, the other magnetic steel 31 and the second pole core 34 are sequentially arranged and fixedly connected along the first direction. Moreover, both magnetic steels 31 are magnetized along the first direction, and the magnetization directions of the two magnetic steels 31 are opposite. In this embodiment, the N poles of the two magnetic steels 31 are arranged facing each other, please refer to Figure 6 shown.

[0036] In this embodiment, the excitation schematic diagram of the magnetic steel 31 is as follows: Figure 6 As shown, under the excitation in the direction shown in the figure, the winding 12 in the stator 1 is subjected to the Ampere force, and the direction of the overall force of the stator 1 is downward, so that the direction of the force on the mover 3 is upward. Figure 6 When the current is in the opposite direction to the current shown, the resultant force on the mover 3 is in the downward direction. When the winding 12 is supplied with a periodic current, the stator 1 generates a periodic electromagnetic force on the mover 3. This electromagnetic force acts as an excitation source to drive the mover 3 to vibrate in the first direction, with a fast response and a more realistic vibration.

[0037] It should be noted that, in other implementations, please refer to Figure 7 The S poles of the two magnetic steels 31 can be arranged facing each other, and can be arranged according to actual conditions, which is not limited here.

[0038] In some embodiments, please refer to Figures 10 to 12 As shown, the stator 1 may include a plurality of windings 12, all of which may be coaxially arranged and sequentially spaced along a first direction, and all of which are fixed to the housing 11. Furthermore, the current directions of two adjacent windings 12 are opposite.

[0039] Correspondingly, the mover 3 includes a first pole core 33, a second pole core 34, a plurality of third pole cores 35 and a plurality of magnetic steels 31. Among them, a third pole core 35 is arranged between two adjacent magnetic steels 31, and the number of magnetic steels 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 the windings 12 are arranged in a one-to-one correspondence, and the windings 12 are wrapped around the corresponding third pole cores 35.

[0040] As an optional implementation, please refer to Fig.12As shown, the stator 1 may include two windings 12 spaced apart in a first direction, and the current directions of the two windings 12 are opposite. The mover 3 may include a first pole core 33, a second pole core 34, two third pole cores 35, and three magnetic steels 31. A third pole core 35 is arranged between two adjacent magnetic steels 31, and the winding 12 surrounds the corresponding third pole core 35. Among them, all magnetic steels 31 are magnetized along the first direction, and the magnetization directions of two adjacent magnetic steels 31 are opposite.

[0041] It should be noted that, in other embodiments, the stator 1 may include more windings 12, and the number of third pole cores 35 in the mover 3 and the number of magnetic steels 31 may be increased accordingly. This may be set according to actual conditions and is not limited here.

[0042] In some preferred embodiments, please refer to Figure 6 and Fig.12 The housing 11 is a hollow structure having a first opening 112 and a second opening 113. The first opening 112 and the second opening 113 are arranged opposite to each other in the first direction, and the hollow part of the housing 11 is constructed as a receiving space 111. The first elastic member 2a is arranged corresponding to the first opening 112, the middle part of the first elastic member 2a is connected to the first pole core 33, and the two ends of the first elastic member 2a are respectively fixed to the housing 11. The second elastic member 2b is arranged corresponding to the second opening 113, the middle part of the second elastic member 2b is connected to the second pole core 34, and the two ends of the second elastic member 2b are respectively fixed to the housing 11. In this embodiment, the first elastic member 2a and the second elastic member 2b are respectively arranged across the corresponding openings, so that the mover 3 can be reliably and effectively suspended in the receiving space 111.

[0043] In some more preferred embodiments, please refer to Figure 3 , a first hole 21 is formed on the first elastic member 2a. Accordingly, the first pole core 33 includes a first body 331 and a first convex body 332. The first convex body 332 is formed on the side of the first body 331 facing the first elastic member 2a. The first convex body 332 is inserted and fixed in the first hole 21, thereby fixing the first elastic member 2a and the mover 3. Similarly, please refer to Figure 3 , 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 convex body 342. The second convex body 342 is formed on the side of the second body 341 facing the second elastic member 2b. The second convex body 342 is inserted and fixed in the second hole 22, thereby fixing the second elastic member 2b and the mover 3. This embodiment is not only simple in structure, but also can quickly and accurately connect and fix the elastic member 2 and the mover 3, further reducing the difficulty of assembly and improving the product yield.

[0044] As an optional implementation, please refer to Figure 3The first elastic member 2a may have two first holes 21, which are spaced and symmetrically arranged in the length direction of the first elastic member 2a. Accordingly, the first pole core 33 includes two first protrusions 332, which are arranged one by one with the first holes 21, and each first protrusion 332 is inserted and fixed in the corresponding first hole 21. Similarly, please refer to Figure 3 , the second elastic member 2b is provided with two second holes 22, which are spaced and symmetrically arranged in the length direction of the second elastic member 2b. Accordingly, the second pole core 34 includes two second protrusions 342, which are arranged one by one with the second holes 22, and each second protrusion 342 is inserted and fixed in the corresponding second hole 22. This embodiment can further improve the assembly accuracy between the first elastic member 2a, the second elastic member 2b and the mover 3, so as to more stably and reliably suspend the mover 3 in the receiving space 111.

[0045] In some embodiments, the first protrusion 332 may be Figure 2 , Figure 3 , Figure 6 , Figure 7 and Fig.12 It should be noted that in other embodiments, the first protrusion 332 may be a structure of other shapes. For example, the first protrusion 332 may be a cylinder or a square or any other protruding shape, which may be set according to actual conditions and will not be described in detail here. Similarly, the second protrusion 342 may be Figure 6 , Figure 7 and Fig.12 It should be noted that, in other embodiments, the second convex body 342 may be a structure of other shapes. For example, the second convex body 342 may be a cylinder or a square body or any other convex shape, which may be set according to actual conditions and will not be described in detail here.

[0046] In some preferred embodiments, please refer to Figure 5 and Fig.11 As shown, the length of the housing 11 in the second direction is greater than the length of the housing 11 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. Moreover, the second direction is the length direction of the first elastic member 2a and the second elastic member 2b. The two ends of the first elastic member 2a in the second direction are respectively fixed to the two ends of the housing 11 in the second direction, and the two ends of the second elastic member 2b in the second direction are respectively fixed to the two ends of the housing 11 in the second direction, which can effectively enhance the vibration feeling.

[0047] In some embodiments, please refer to Figure 3The housing 11 can be an integrated structure, which further reduces the assembly process of the vibration motor and makes it easier to assemble.

[0048] In some embodiments, please refer to Figure 8 In order to facilitate the processing of the shell 11, the shell 11 can be a split structure, and the shell 11 is formed by assembling at least two shell parts.

[0049] As an optional embodiment, the housing 11 can be formed by assembling a first housing 114 and a second housing 115, and the first housing 114 and the second housing 115 are centrally symmetrically arranged about the central axis of the housing 11. The first housing 114 includes a first plate 1141 and a second plate 1142, and the second plate 1142 is formed by bending from one end of the first plate 1141. The second housing 115 includes a third plate 1151 and a fourth plate 1152, and the fourth plate 1152 is formed by bending from one end of the third plate 1151. One end of the first plate 1141 away from the second plate 1142 is fixed to one end of the fourth plate 1152 away from the third plate 1151, and one end of the second plate 1142 away from the first plate 1141 is fixed to one end of the third plate 1151 away from the fourth plate 1152, so as to enclose and form the receiving space 111.

[0050] As an example, the first plate body 1141 and the fourth plate body 1152 may be fixedly connected by welding or the like, and the second plate body 1142 and the third plate body 1151 may be fixedly connected by welding or the like.

[0051] As an optional implementation, please refer to Fig. 9 The housing 11 can be formed by assembling two third shells 116 and two fourth shells 117. The two third shells 116 are arranged in parallel and spaced apart, and the two fourth shells 117 are arranged in parallel and spaced apart. The two third shells 116 are connected and fixed by the two fourth shells 117 to enclose and form a receiving space 111.

[0052] As an example, the third shell portion 116 and the fourth shell portion 117 may be fixedly connected by welding or the like.

[0053] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A vibration motor, characterized in that: include: The stator comprises a housing having a receiving space, and a winding received in the receiving space, wherein the winding is arranged around a first direction and fixed to the housing; elastic member; and A mover, whose end in the first direction is connected to the housing through the elastic member and suspended in the accommodating space, comprises a first pole core and a second pole core spaced apart in the first direction, at least two magnetic steels arranged between the first pole core and the second pole core along the first direction, and a third pole core arranged between adjacent magnetic steels, each of the magnetic steels is magnetized along the first direction, and the magnetization directions of adjacent magnetic steels are opposite, and the mover is at least partially surrounded by the winding.

2. The vibration motor according to claim 1, wherein: The vibration motor includes two elastic members, which are respectively a first elastic member and a second elastic member. The first elastic member is fixed to one end of the housing along the first direction and connected to one end of the mover, and the second elastic member 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 according to claim 2, characterized in that The stator includes a plurality of windings arranged in sequence along a first direction. The plurality of windings are coaxially arranged and current directions of two adjacent windings are opposite.

4. The vibration motor according to 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 wound around the corresponding third pole cores.

5. The vibration motor according to claim 2, wherein: The housing is a hollow structure having a first opening and a second opening, the first opening and the second opening are arranged opposite to each other in the first direction, and the hollow portion of the housing is configured as the receiving space; The first elastic member is arranged corresponding to the first opening, the two ends of the first elastic member are respectively fixed to the shell, and the middle part of the first elastic member is fixed to the first pole core; the second elastic member is arranged corresponding to the second opening, the two ends of the second elastic member are respectively fixed to the shell, and the middle part of the second elastic member is fixed to the second pole core.

6. The vibration motor according to claim 5, characterized in that A first hole is formed on the first elastic member, the first pole core comprises a first body and a first protrusion formed on the first body, and the first protrusion is inserted and fixed in the first hole; The second elastic member is provided with a second hole, the second pole core comprises a second body and a second protrusion formed on the second body, and the second protrusion is inserted into and fixed to the second hole.

7. The vibration motor according to claim 6, characterized in that The first elastic member is provided with two first holes, which are spaced apart and symmetrically arranged in the length direction of the first elastic member, and the first pole core includes two first convex bodies, which are arranged in one-to-one correspondence with the first holes; The second elastic member has two second holes formed therein, the two second holes are spaced apart and symmetrically arranged in the length direction of the second elastic member, and the second pole core includes two second protrusions, the second protrusions are arranged in one-to-one correspondence with the second holes.

8. The vibration motor according to claim 5, characterized in that The length of the shell in the second direction is greater than the length of the shell in the third direction; the second direction is perpendicular to the third direction and perpendicular to the first direction; Two ends of the first elastic member in the second direction are respectively fixed to two ends of the housing in the second direction, and two ends of the second elastic member in the second direction are respectively fixed to two ends of the housing in the second direction.

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

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