Elastic sheet assembly for vibration motors and linear vibration motor

Abstract

The invention discloses an elastic sheet assembly for vibration motors. The elastic sheet assembly comprises two V-shaped elastic sheets, wherein each V-shaped elastic sheet comprises two elastic arms; the elastic arms are flat and straight plate springs; the height of the elastic arms is equal to the height of the elastic sheets; arc-shaped gaps are formed in the elastic arms; a Z-axis direction avoiding groove is formed by the arc-shaped gaps; the two V-shaped elastic sheets are up-down fastened through the arc-shaped gaps; the V-shaped openings of the two V-shaped elastic sheets face opposite directions; after the two V-shaped elastic sheets are fastened, the height of the elastic sheet assembly is equal to the height of the elastic arms; and a U-shaped bend is arranged between the two elastic arms of each V-shaped elastic sheet. The elastic sheet assembly has the characteristics of being simple in structure, large in elastic force, small in occupied space volume and low in manufacturing cost.

Description

technical field [0001] The invention relates to a shrapnel assembly for a vibration motor, which is used to provide elastic force for a quality block arranged in the motor. Background technique [0002] The existing X-axis linear vibration motor includes an upper shell and a lower shell. The sealed space composed of the upper and lower shells contains a vibration system and a stator system. The vibration system is composed of a mass block, a permanent magnet, a washer, and an elastic body. The stator system consists of Composed of FPCB and coil. The traditional vibration motor has only one shrapnel, such as a V-shaped shrapnel. One end of the shrapnel is welded to the shell, and the other end is welded to the mass block. There are polarization problems in multiple directions when vibrating. Moreover, the shrapnel is prone to stress concentration and the problem of a small recovery force of a single shrapnel. [0003] For this reason, shrapnel designs with more complex stru...

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Problems solved by technology

[0004] An X-axis vibration motor is disclosed in the Chinese invention patent "Linear Vibration Motor" (application number: 201610127478.X). Elastic supports are arranged on both sides of the mass block. The elastic supports are V-shaped when viewed from above, and include two Elastic arm, the elastic arm is arc-shaped, the two elastic arms are independently manufactured and then assembled into a V shape, and the assembled connection ends are connected after crossing. Although this structure can provide greater elastic force, the structure and manufacturing process are more complicated. , when two elastic supports are arranged on one side of the mass block, they need to be arranged up and down and occupy the height of more than two shrapnels, and the space occupied in the height direction is relatively large, which is not conducive to the improvement of the lightness and thinness of the motor

[0005] In the Chinese invention patent "A Linear Vibration Motor" (application number: 201510835600.4), an X-axis vibration motor is disclosed. Elastic supports are arranged on both sides of the mass block. When the elastic supports are used in combination, they can cross and avoid in the Z-axis direction, and only occupy the height of one elastic support. Although this structure can provide greater elastic force, it takes up a large space in the length and height directions. It cannot be significantly reduced, otherwise the avoidance function will be lost, and the structure and manufacturing process will be more complicated, which is not conducive to the miniaturization and cost control of the motor

[0006] In the Chinese invention patent "Linear Vibration Motor" (application number: 201510835647.0), an X-axis vibration motor is disclosed. Elastic supports are arranged on both sides of the mass block. The elastic supports are V-shaped or W-shaped when viewed from above. Approximate S-shaped arc shape, when two elastic supports are used in combination, they can cross and avoid in the Z-axis direction, and only occupy the height of one elastic support. Although this structure can provide greater elasticity, it takes up space in the height direction The volume is large, and the width of the elastic arm is obviously smaller than the height of the connection point, and the structure and manufacturing process are also complicated, which is not conducive to the miniaturization and cost control of the motor

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