Linear motor with elastic brackets having welding tabs with arcuate edge
The present application provides a linear motor, including a casing, a vibrator assembly, and elastic brackets. The elastic brackets are arranged on both sides of a vibration direction of the vibrator assembly, including a first fixing portion connected to the casing, a second fixing portion connected to the vibrator assembly, and a connecting portion. An outer surface of the second fixing portion is provided with a welding tab, and the welding tab includes two first side edges arranged relatively parallel to each other and extended along the vibration direction, a second side edge and an arcuate edge connecting the two first side edges. The arcuate edge is protruded in a direction away from the second side edges. The edges of the welding tabs in the linear motor have an arcuate structure, which can improve the stress distribution of the elastic brackets and improve the lifespan of the product.
1 . A linear motor, comprising:
a casing having an accommodating space;
a vibrator assembly accommodated in the casing; and
a pair of elastic brackets fixed to the casing and arranged on both sides along a vibration direction of the vibrator assembly, comprising:
a first fixing portion connected to the casing;
a second fixing portion connected to the vibrator assembly; and
a connecting portion connecting the first fixing portion to the second fixing portion;
wherein an outer surface of the second fixing portion is provided with a welding tab; the welding tab comprises two first side edges arranged parallel to each other and extended along the vibration direction, a second side edge and an arcuate edge connecting the two the first side edges, wherein the arcuate edge is closer to the connecting portion than the second side edge, and the arcuate edge is protruded in a direction away from the second side edge.
2 . The linear motor of claim 1 , wherein the first side edges and the second side edge are flush with an edge of the second fixing portion.
3 . The linear motor of claim 1 , wherein the casing comprises an upper cover and a lower cover arranged opposite to each other, wherein the lower cover is fixedly provided with a stator assembly configured to drive the vibrator assembly to vibrate and a limit block configured to limit the vibrator assembly to move in the vibration direction.
4 . The linear motor of claim 1 , wherein the second side edge is perpendicular to the vibration direction.
5 . The linear motor of claim 4 , wherein the arcuate edge is symmetrical along a central axis of the second side edge.
6 . The linear motor of claim 1 , wherein the vibrator assembly comprises a mass block having a mounting cavity and a magnetic circuit structure arranged in the mounting cavity, wherein the mass block is provided with a fixing bump fixed to the second fixing portion, and the fixing bump is shaped in accordance with a shape of the welding tab.
7 . The linear motor of claim 6 , wherein a foam damping is provided between the connecting portion and the mass block.