Vibration motor

Abstract

The present invention provides a vibration motor. [Solution] The vibration motor according to the present invention includes a housing, a vibrator, a pair of elastic support members, and a stator. The vibrator includes a mass block and has a pair of corners at diagonal angles to the mass block, each corner including a first side edge, a second side edge, and a hypotenuse connecting the first and second side edges. The pair of elastic support members are provided at both ends of the vibrator in a first direction. The housing includes a pair of side walls, and each elastic support member includes a first fixing portion fixed to the hypotenuse of the corresponding corner, a straight side portion bending and extending from the first fixing portion in a direction away from the first side edge of the corresponding corner and closer to the second side edge of the corresponding corner, a second fixing portion fixed to the side wall away from the corresponding corner, and an arc portion connecting the straight side portion and the second fixing portion. The performance of the vibration motor according to the present invention can be improved.

Description

[Technical field]

[0001] The present invention relates to the field of vibration motors, and in particular to vibration motors applied to portable electronic devices. [Background technology]

[0002] The vibration motor of the prior art includes a housing, a vibrator accommodated in the housing, and a pair of "V"-shaped elastic support members that suspend the vibrator in the housing, and the "V"-shaped elastic support members have good rigidity and can maintain the vibration mode of the vibrator. However, due to the large angle bending of the "V"-shaped elastic support members, the "V"-shaped elastic support members are easily fatigued during operation and have insufficient deformation capacity, resulting in poor performance of the vibration motor.

[0003] Therefore, there is a need to provide a new type of vibration motor that solves the above technical problems. Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a vibration motor that overcomes the above technical problems and has improved performance. [Means for solving the problem]

[0005] In order to achieve the above object, the present invention provides a vibration motor, the vibration motor comprising: a housing; a vibrator accommodated in the housing; a pair of elastic support members fixed to the housing for suspending the vibrator within the housing; and a stator fixed to the housing for driving the vibrator to vibrate along a first direction, the vibrator comprising a mass block, the mass block having a pair of diagonally disposed corners, each corner having a first side extending along the first direction, a second side extending along a second direction perpendicular to the first direction, and a stator fixed to the housing for driving the vibrator to vibrate along a first direction. and a hypotenuse connecting the first side edge and the second side edge, the pair of elastic support members are respectively provided at both ends of the vibrator in the first direction, the housing includes a pair of side walls extending along the first direction, and each elastic support member includes a first fixed portion fixed to the hypotenuse of the corresponding corner, a straight side portion extending from the first fixed portion, away from the first side edge of the corresponding corner and bending in a direction toward the second side edge of the corresponding corner, a second fixed portion fixed to the side wall away from the corresponding corner, and a circular arc portion connecting the straight side portion and the second fixed portion.

[0006] Preferably, the pair of elastic support members are provided symmetrically about the center.

[0007] Preferably, the mass block has a through hole extending along a third direction perpendicular to the first direction and the second direction, the vibrator further includes a magnetic circuit system housed in the through hole, and the stator is housed in the through hole and is installed opposite and spaced apart from the magnetic circuit system.

[0008] Preferably, the stator includes a pole piece fixed to the housing, and a coil arranged to be wound around the pole piece.

[0009] Preferably, the magnetic circuit system includes magnet sections provided at both ends of the stator in the first direction and at both ends in the second direction, and each magnet section includes a magnetic pole core fixed to the mass block and magnet steel fixed to the magnetic pole core.

[0010] Preferably, the first fixing part and the second fixing part are provided with soldering lugs on their outer surfaces.

[0011] Preferably, the vibration motor further includes a stopper fixed to the housing for limiting displacement of the vibrator in the first direction. Effect of the Invention

[0012] In the vibration motor of the present invention, a corner is provided on the mass block, and the elastic support member has a first fixed portion fixed to the hypotenuse of the corresponding corner, a straight side portion extending from the first fixed portion, away from the first side edge of the corresponding corner and bending in a direction closer to the second side edge of the corresponding corner, a second fixed portion fixed to the side wall away from the corresponding corner, and an arc portion connecting the straight side portion and the second fixed portion, and the elastic support member is fixed to the corner of the mass block, thereby saving space, and this elastic support member has good rigidity and can ensure the vibration mode of the vibrator. At the same time, the bending angle of the elastic support member is small, it is resistant to fatigue, and has excellent deformation ability, thereby improving the performance of the vibration motor. [Brief description of the drawings]

[0013] In order to more clearly describe the technical solutions in the embodiments of the present invention, the drawings necessary for describing the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can obtain other drawings based on these drawings without any inventive work, among which: [Figure 1] FIG. 1 is a perspective view of a vibration motor according to the present invention. [Diagram 2] FIG. 2 is an exploded view of the vibration motor shown in FIG. [Diagram 3] FIG. 3 is a schematic assembly diagram of the stator, vibrator, elastic support member, soldering lugs, and part of the housing of the vibration motor shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The technical ideas in the embodiments of the present invention will be described below clearly and completely with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by those skilled in the art without making inventive efforts based on the embodiments of the present invention shall be included in the protection scope of the present invention.

[0015] As shown in Figures 1 to 3, the present invention provides a vibration motor 100 including a housing 1, a vibrator 2 accommodated in the housing 1, a pair of elastic support members 3 fixed to the housing 1 for suspending the vibrator 2 within the housing 1, and a stator 4 fixed to the housing 1 for driving the vibrator 2 to vibrate along a first direction X.

[0016] The pair of elastic support members 3 are provided on both ends of the vibrator 2 in the first direction X, respectively.

[0017] The vibrator 2 includes a mass block 21 and has a pair of corners 211 at which the mass block 21 is diagonally arranged, and each corner 211 includes a first side edge 2111 extending along the first direction X, a second side edge 2112 extending along a second direction Y perpendicular to the first direction X, and a hypotenuse 2113 connecting the first side edge 2111 and the second side edge 2112.

[0018] The housing 1 includes a pair of side walls 11 extending along the first direction X.

[0019] Each elastic support member 3 includes a first fixing portion 31 fixed to the hypotenuse 2113 of the corresponding corner 211, a straight side portion 32 extending from the first fixing portion 31, away from the first side edge 2111 of the corresponding corner 211 and bending in a direction closer to the second side edge 2112 of the corresponding corner 211, a second fixing portion 33 fixed to the side wall 11 away from the corresponding corner 211, and a circular arc portion 34 connecting the straight side portion 32 and the second fixing portion 33, and soldering lugs 5 are provided on the outer surfaces of the first fixing portion 31 and the second fixing portion 33.

[0020] Preferably, the pair of elastic support members 3 are provided symmetrically about the center.

[0021] The mass block 21 has a through hole 210 penetrating along a third direction Z perpendicular to the first direction X and the second direction Y, and the vibrator 2 further includes a magnetic circuit system 22 housed in the through hole 210, and the stator 4 is housed in the through hole 210 and is installed opposite the magnetic circuit system 22 at a distance.

[0022] The stator 4 includes a pole piece 41 fixed to the housing 1 and a coil 42 arranged to be wound around the pole piece 41 .

[0023] The magnetic circuit system 22 includes magnet sections 221 provided on both ends of the stator 4 in the first direction X and on both sides in the second direction Y, and each magnet section 221 includes a magnetic pole core 2211 fixed to the mass block 21 and a magnet steel 2212 fixed to the magnetic pole core 2211.

[0024] The vibration motor 100 further includes a stopper 6 fixed to the housing 1 for limiting the displacement of the vibrator 2 in the first direction X, and a circuit board 7 fixed to the housing 1 for supplying power to the coil 42.

[0025] In the vibration motor of the present invention, a corner is provided on the mass block, and the elastic support member has a first fixed portion fixed to the hypotenuse of the corresponding corner, a straight side portion extending from the first fixed portion, away from the first side edge of the corresponding corner and bending in a direction closer to the second side edge of the corresponding corner, a second fixed portion fixed to the side wall away from the corresponding corner, and an arc portion connecting the straight side portion and the second fixed portion, and the elastic support member is fixed to the corner of the mass block, thereby saving space, and this elastic support member has good rigidity and can ensure the vibration mode of the vibrator. At the same time, the bending angle of the elastic support member is small, it is resistant to fatigue, and has excellent deformation ability, thereby improving the performance of the vibration motor.

[0026] The above is merely an embodiment of the present invention, and it should be noted here that those skilled in the art may make modifications without departing from the creative idea of ​​the present invention, and all such modifications are within the scope of protection of the present invention.

Claims

1. A vibration motor comprising: a housing; a vibrator accommodated in the housing; a pair of elastic support members fixed to the housing for suspending the vibrator within the housing; and a stator fixed to the housing for driving the vibrator to vibrate along a first direction, the vibrator includes a mass block and has a pair of corners at which the mass block is diagonally disposed, each corner including a first side extending along the first direction, a second side extending along a second direction perpendicular to the first direction, and an oblique side connecting the first side and the second side, the pair of elastic support members are provided at both ends of the vibrator in the first direction, the housing includes a pair of side walls extending along the first direction, each elastic support member including a first fixing portion fixed to the oblique side of the corresponding corner, a straight side portion extending from the first fixing portion in a direction away from the first side of the corresponding corner and closer to the second side of the corresponding corner, a second fixing portion fixed to the side wall away from the corresponding corner, and an arc portion connecting the straight side portion and the second fixing portion. A vibration motor comprising:

2. The pair of elastic support members are provided symmetrically about a center.

2. The vibration motor according to claim 1 .

3. the mass block is provided with a through hole penetrating along a third direction perpendicular to the first direction and the second direction, the vibrator further includes a magnetic circuit system housed in the through hole, and the stator is housed in the through hole and is disposed opposite to and spaced apart from the magnetic circuit system.

2. The vibration motor according to claim 1 .

4. The stator includes a pole piece fixed to the housing, and a coil arranged to be wound around the pole piece.

4. The vibration motor according to claim 3.

5. the magnetic circuit system includes magnet units provided on both ends of the stator in the first direction and on both sides of the stator in the second direction, each magnet unit including a magnetic pole core fixed to the mass block and a magnet steel fixed to the magnetic pole core; 4. The vibration motor according to claim 3.

6. Solder lugs are provided on the outer surfaces of the first fixing portion and the second fixing portion.

2. The vibration motor according to claim 1 .

7. the vibration motor further includes a stopper fixed to the housing for limiting displacement of the vibrator in the first direction.

2. The vibration motor according to claim 1 .

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