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 particularly to vibration motors applied to portable electronic devices.

Background Art

[0002] Conventional vibration motors include a housing, a vibrator housed in the housing, and a pair of "V"-shaped elastic support members that suspend the vibrator in the housing. 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 prone to fatigue during operation, have insufficient deformation ability, and the performance of the vibration motor is not good.

[0003] Therefore, it is necessary to provide a new type of vibration motor that solves the above technical problems.

Summary of the Invention

Problems 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 improves performance.

Means for Solving the Problems

[0005] To achieve the above object, the present invention provides a vibration motor, which includes a housing, a vibrator housed in the housing, and is fixed to the housing and suspends the vibrator in the housing SuspendA pair of elastic support members and a stator fixed to the housing for driving the vibrator to vibrate along a first direction, the vibrator comprising a mass block having a pair of corner portions where the mass block is disposed diagonally, each corner portion including a first side extending along the first direction, a second side extending along a second direction perpendicular to the first direction, and a hypotenuse connecting the first side and the second side, the pair of elastic support members being respectively provided at both ends of the vibrator in the first direction, the housing including a pair of side walls extending along the first direction, each elastic support member including a first fixing portion fixed to the hypotenuse of the corresponding corner portion, a straight side portion extending from the first fixing portion and bending away from the first side of the corresponding corner portion and approaching the second side of the corresponding corner portion, a second fixing portion fixed to the side wall away from the corresponding corner portion, and an arc portion connecting the straight side portion and the second fixing portion.

[0006] Preferably, the pair of elastic support members are provided in central symmetry.

[0007] Preferably, 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 including a magnetic circuit system accommodated in the through hole, the stator being accommodated in the through hole and disposed at an interval facing the magnetic circuit system.

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

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

[0010] Preferably, solder lugs are provided on the outer surfaces of the first fixing portion and the second fixing portion.

[0011] Preferably, the vibration motor is fixed to the housing and further includes a stopper for restricting displacement of the vibrator in the first direction.

Advantages of the Invention

[0012] In the vibration motor of the present invention, the mass block is provided with corners, and the elastic support member includes a first fixing portion fixed to the hypotenuse of the corresponding corner, a straight side portion that bends and extends from the first fixing portion in a direction away from the first side of the corresponding corner and close 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. The elastic support member is fixed to the corner of the mass block, thereby saving space. Also, this elastic support member has good rigidity, can ensure the vibration mode of the vibrator, and at the same time, the bending angle of this elastic support member is small, it is not easily fatigued, has excellent deformation ability, and improves the performance of the vibration motor.

Brief Description of the Drawings

[0013] To more clearly explain the technical solutions in the embodiments of the present invention, the following briefly describes the drawings necessary for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. A person skilled in the art can obtain other drawings based on these drawings without making creative efforts. Among them,

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0014] Hereinafter, with reference to the drawings in the embodiments of the present invention, the technical concept in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained on the premise that those skilled in the art do not make creative efforts based on the embodiments in the present invention shall be included in the protection scope of the present invention.

[0015] As shown in FIGS. 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 and for elastically supporting the vibrator 2 in the housing 1, and a stator 4 fixed to the housing 1 and for driving the vibrator 2 to vibrate along a first direction X. Suspend The pair of elastic support members 3 are respectively provided at both ends of the vibrator 2 in the first direction X.

[0016] The vibrator 2 includes a mass block 21, the mass block 21 has a pair of corner portions 211 installed diagonally, and each corner portion 211 includes a first side 2111 extending along the first direction X, a second side 2112 extending along a second direction Y perpendicular to the first direction X, and a hypotenuse 2113 connecting the first side 2111 and the second side 2112.

[0017] The housing 1 includes a pair of side walls 11 extending along the first direction X.

[0018]

[0019] ​Each elastic support member 3 includes a first fixing portion 31 fixed to the hypotenuse 2113 of the corresponding corner portion 211, a straight side portion 32 that bends and extends from the first fixing portion 31 in a direction away from the first side 2111 of the corresponding corner portion 211 and close to the second side 2112 of the corresponding corner portion 211, a second fixing portion 33 fixed to the side wall 11 away from the corresponding corner portion 211, and an arc portion 34 connecting the straight side portion 32 and the second fixing portion 33. Solder 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 is provided with a through hole 210 penetrating along a third direction Z perpendicular to the first direction X and the second direction Y. The vibrator 2 further includes a magnetic circuit system 22 accommodated in the through hole 210. The stator 4 is accommodated in the through hole 210 and is installed at an interval facing the magnetic circuit system 22.

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

[0023] The magnetic circuit system 22 includes magnet portions 221 respectively provided at both ends of the stator 4 in the first direction X and both sides in the second direction Y. Each magnet portion 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, the mass block is provided with corners, and the elastic support member includes a first fixing portion fixed to the hypotenuse of the corresponding corner, a straight side portion that bends and extends from the first fixing portion in a direction away from the first side of the corresponding corner and close 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. The elastic support member is fixed to the corner of the mass block, thereby saving space. In addition, this elastic support member has good rigidity, can ensure the vibration mode of the vibrator, and at the same time, the bending angle of this elastic support member is small, it is not easily fatigued, has excellent deformation ability, and improves the performance of the vibration motor.

[0026] The above are only embodiments of the present invention. It should be pointed out here that those skilled in the art can also make improvements without departing from the creative idea of the present invention, and all these improvements are included in the protection scope of the present invention.

Claims

1. A vibration motor comprising a housing, a vibrator housed in the housing, a pair of elastic support members fixed to the housing for suspending the vibrator in the housing, and a stator fixed to the housing for driving the vibrator to vibrate along a first direction, wherein the vibrator includes a mass block having a pair of corner portions where the mass blocks are diagonally installed, and each corner portion includes a first side extending along the first direction, a second side extending along a second direction perpendicular to the first direction, and a hypotenuse connecting the first side and the second side; 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; each elastic support member includes a first fixing portion fixed to the hypotenuse of the corresponding corner portion, a straight side portion extending from the first fixing portion and bending away from the first side of the corresponding corner portion and approaching the second side of the corresponding corner portion, a second fixing portion fixed to the side wall away from the corresponding corner portion, and an arc portion connecting the straight side portion and the second fixing portion. A vibration motor characterized by the above.

2. The pair of elastic support members are provided symmetrically about the center. The vibration motor according to claim 1, characterized by the above.

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 installed at an interval facing the magnetic circuit system. The vibration motor according to claim 1, characterized by the above.

4. The stator includes a magnetic pole piece fixed to the housing and a coil installed to be wound around the magnetic pole piece. The vibration motor according to claim 3, characterized by the above.

5. The magnetic circuit system includes magnet portions respectively provided at both ends of the stator in the first direction and both sides of the stator in the second direction, and each magnet portion includes a magnetic pole core fixed to the mass block and a magnet steel fixed to the magnetic pole core. The vibration motor according to claim 3, characterized by the above.

6. Soldering lugs are provided on the outer surfaces of the first fixing portion and the second fixing portion. The vibration motor according to claim 1, characterized in that...

7. The vibration motor is fixed to the housing and further includes a stopper for restricting displacement of the vibrator in the first direction. The vibration motor according to claim 1, characterized in that...

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