Vibration motor

Abstract

The present invention provides a vibration motor. [Solution] The vibration motor includes a housing having an accommodation space, a stator assembly fixed in the housing, a vibrator assembly housed in the housing and driven by the stator assembly to vibrate, and a leaf spring connecting the housing and the vibrator assembly, the leaf spring includes an outer fixing part fixed to the housing, an inner fixing part fixed to the vibrator assembly, and an elastic arm connecting the outer fixing part and the inner fixing part, the elastic arm extends from the inner fixing part to the outer fixing part so as to rotate around the inner fixing part, and the vibration motor further includes a damping rubber installed between two adjacent elastic arms for adjusting vibration damping of the vibrator assembly. The vibration motor of the present invention reduces material costs and improves product reliability and consistency.

Description

[Technical field]

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

[0002] A conventional vibration motor includes a housing having an accommodation space, a stator assembly fixed in the housing, a vibrator assembly accommodated in the housing and driven by the stator assembly to vibrate, a leaf spring connecting the housing and the vibrator assembly, and a magnetic liquid disposed between the stator assembly and the vibrator assembly to adjust the vibration damping of the vibrator assembly. However, the material cost of the magnetic liquid is high, and the position of the magnetic liquid cannot be effectively controlled due to the influence of a magnetic field, resulting in low product reliability and consistency.

[0003] Therefore, it is necessary to provide a new vibration motor to solve the above technical problems. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a vibration motor that solves the above technical problems, reduces material costs, and improves product reliability and consistency. [Means for solving the problem]

[0005] In order to achieve the above object, the present invention provides a vibration motor, the vibration motor including: a housing having an accommodation space; a stator assembly fixed in the housing; a vibrator assembly accommodated in the housing and driven to vibrate by the stator assembly; and a leaf spring connecting the housing and the vibrator assembly, the leaf spring including an outer fixing part fixed to the housing, an inner fixing part fixed to the vibrator assembly, and an elastic arm connecting the outer fixing part and the inner fixing part, the elastic arm extending from the inner fixing part to the outer fixing part so as to rotate around the inner fixing part, and the vibration motor further including a damping rubber installed between two adjacent elastic arms and for adjusting vibration damping of the vibrator assembly.

[0006] Preferably, three elastic arms are provided, and the three elastic arms are equally spaced at 120° around the inner fixing part.

[0007] Preferably, two leaf springs are provided, a first leaf spring connecting the housing and one end of the vibrator assembly, and a second leaf spring connecting the housing and the other end of the vibrator assembly, and the rotation direction of the elastic arm of the first leaf spring is opposite to the rotation direction of the elastic arm of the second leaf spring.

[0008] Preferably, the leaf spring is integrally press-formed from a stainless steel plate.

[0009] Preferably, the vibrator assembly includes a bracket, a coil wound around the bracket, and a counterweight fixed to the bracket, a metal member is fitted within the bracket, the metal member includes a first metal plate, a second metal plate installed parallel to and spaced apart from the first metal plate, and a metal pillar connecting the first metal plate and the second metal plate, the metal pillar being perpendicular to the first metal plate and extending along the vibration direction of the vibrator assembly, and the coil is fitted around the metal pillar and positioned between the first metal plate and the second metal plate.

[0010] Preferably, the stator assembly includes a pole plate fixed to the housing and magnetic steel fixed to a surface of the pole plate adjacent to the transducer assembly, the magnetic steel and the coil being arranged opposite each other and spaced apart. Effect of the Invention

[0011] In the vibration motor of the present invention, a damping rubber is installed between two adjacent elastic arms. When the vibrator assembly vibrates, a displacement difference exists between the two adjacent elastic arms, which causes tension and compression in the damping rubber between them, and serves to adjust the vibration damping of the vibrator assembly. By using the damping rubber instead of the magnetic liquid, the material cost is reduced and the reliability and consistency of the product are improved. [Brief description of the drawings]

[0012] In order to more clearly describe the technical solutions in the embodiments of the present invention, the following will briefly describe the drawings that need to be used in describing the embodiments. However, the drawings described below are only some embodiments of the present invention, and it is obvious to those skilled in the art that other drawings can be obtained based on these drawings without any creative work. [Figure 1] FIG. 2 is a perspective view of a vibration motor according to the present invention. [Diagram 2] 2 is an exploded perspective view of the vibration motor shown in FIG. 1. [Diagram 3] FIG. 2 is a cross-sectional view taken along the line AA in FIG. [Figure 4] FIG. 2 is a combination diagram of a leaf spring and a damping rubber of the vibration motor shown in FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, but it is clear that the described embodiments are only some of the embodiments of the present invention, and are not all of the embodiments. All other embodiments obtained based on the embodiments of the present invention without the creative labor of those skilled in the art shall fall within the protection scope of the present invention.

[0014] As shown in Figures 1 to 4, the present invention provides a vibration motor 100, which includes a housing 1 having an accommodation space, a stator assembly 2 fixed within the housing 1, a vibrator assembly 3 accommodated within the housing 1 and driven to vibrate by the stator assembly 2, and a leaf spring 4 connecting the housing 1 and the vibrator assembly 3.

[0015] The leaf spring 4 includes an outer fixing part 41 fixed to the housing 1, an inner fixing part 42 fixed to the vibrator assembly 3, and an elastic arm 43 connecting the outer fixing part 41 and the inner fixing part 42, and the elastic arm 43 extends from the inner fixing part 42 to the outer fixing part 41 so as to rotate around the inner fixing part 42.

[0016] The vibration motor 100 further includes a damping rubber 5 disposed between two adjacent elastic arms 43 for adjusting vibration damping of the vibrator assembly 3 .

[0017] In this embodiment, three elastic arms 43 are provided, and the three elastic arms 43 are distributed around the inner fixing part 42 at equal intervals of 120°.

[0018] The housing 1 includes a frame body 11 , an upper cover 12 attached to an upper end of the frame body 11 , and a lower cover 13 attached to a lower end of the frame body 11 .

[0019] The two leaf springs 4 are a first leaf spring 401 that connects the housing 1 to one end of the vibrator assembly 3 that is adjacent to the upper cover 12, and a second leaf spring 402 that connects the housing 1 to the other end of the vibrator assembly 3 that is adjacent to the lower cover 13. An outer fixing portion 41 of the first leaf spring 401 is fixed between the upper cover 12 and the frame body 11, and an outer fixing portion 41 of the second leaf spring 402 is fixed between the lower cover 13 and the frame body 11.

[0020] Preferably, the rotation direction of the elastic arm 43 of the first leaf spring 401 is opposite to that of the elastic arm 43 of the second leaf spring 402, so that the vibration balance of the transducer assembly 3 can be maintained.

[0021] The leaf spring 4 is integrally press-formed from a stainless steel plate.

[0022] The vibrator assembly 3 includes a bracket 31, a coil 32 wound around the bracket 31, and a counterweight 33 fixed to the bracket 31. A metal member 34 is fitted into the bracket 31. The metal member 34 includes a first metal plate 341, a second metal plate 342 installed parallel to the first metal plate 341 at a distance, and a metal pillar 343 connecting the first metal plate 341 and the second metal plate 342. The metal pillar 343 is perpendicular to the first metal plate 341 and extends along the vibration direction of the vibrator assembly 3. The coil 32 is fitted onto the metal pillar 343 and is located between the first metal plate 341 and the second metal plate 342. The inner fixing parts 42 of the first leaf spring 401 and the second leaf spring 402 are fixed to the bracket 31 by bolts 6, respectively.

[0023] The stator assembly 2 includes a pole plate 21 fixed to the frame body 11 and a magnetic steel 22 fixed to a surface of the pole plate 21 adjacent to the vibrator assembly, and the magnetic steel 22 and the coil 32 are arranged opposite each other with a gap between them.

[0024] In the vibration motor of the present invention, a damping rubber is installed between two adjacent elastic arms. When the vibrator assembly vibrates, a displacement difference exists between the two adjacent elastic arms, which causes the damping rubber between them to stretch and compress, thereby playing a role in adjusting the vibration damping of the vibrator assembly. By using the damping rubber instead of the magnetic liquid, the material cost is reduced and the reliability and consistency of the product are improved.

[0025] The above is only an embodiment of the present invention, and those skilled in the art to which the present invention pertains may further improve it without departing from the creative concept of the present invention, but it should be understood that all of these fall within the scope of protection of the present invention.

Claims

1. A vibration motor, The vibration motor includes a housing having an accommodation space, a stator assembly fixed in the housing, a vibrator assembly accommodated in the housing and driven by the stator assembly to vibrate, and a leaf spring connecting the housing and the vibrator assembly, the leaf spring includes an outer fixing portion fixed to the housing, an inner fixing portion fixed to the transducer assembly, and an elastic arm connecting the outer fixing portion and the inner fixing portion, the elastic arm extends from the inner fixing portion to the outer fixing portion so as to rotate around the inner fixing portion; the vibration motor further includes a damping rubber disposed between two adjacent elastic arms for adjusting vibration damping of the vibrator assembly; The vibrator assembly includes a bracket, a coil wound around the bracket, and a counterweight fixed to the bracket; A metal member is fitted into the bracket, the metal member includes a first metal plate, a second metal plate installed parallel to the first metal plate at a distance, and a metal post connecting the first metal plate and the second metal plate, the metal pillar is perpendicular to the first metal plate and extends along a vibration direction of the transducer assembly; the coil is fitted around the metal post and is located between the first metal plate and the second metal plate; the stator assembly includes a pole plate secured to the housing and a magnetic steel secured to a surface of the pole plate adjacent to the transducer assembly; A vibration motor, characterized in that the magnetic steel and the coil are disposed facing each other with a gap therebetween.

2. The vibration motor according to claim 1 , wherein three of the elastic arms are provided, and the three elastic arms are equally spaced at 120° angles around the inner fixing part.

3. the leaf spring is provided in two pieces, a first leaf spring connecting the housing to one end of the transducer assembly, and a second leaf spring connecting the housing to the other end of the transducer assembly, 2. The vibration motor according to claim 1, wherein a rotation direction of the elastic arm of the first leaf spring is opposite to a rotation direction of the elastic arm of the second leaf spring.

4. 2. The vibration motor according to claim 1, wherein the leaf spring is integrally press-formed from a stainless steel plate.

5. A vibration motor as described in claim 1, characterized in that the leaf spring is fixed to the bracket.

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