Vibrating motor with elastic piece with arms and fixing portion fixed to mass block
A vibrating motor includes a housing defining an accommodating space, a vibrating unit accommodated in the accommodating space, an elastic piece elastically suspending the vibrating unit, and a driving assembly accommodated in the housing. The driving assembly drives the vibrating unit to vibrate. The vibrating unit includes a mass block and a rotor fixed to the mass block. The elastic piece and the mass block are integrally formed through stamping. A position precision of the elastic piece is high, which improves a consistency of the vibrating motor, reduces a stress fluctuation of the elastic piece in a vibrating state, and reduces a possibility of fracture and reliability failure thereof. Moreover, two elastic portions disposed on two sides of the elastic piece are consistent, symmetry of a rotor system is improved, a swing degree of the vibrating motor is reduced, and a performance and a yield level thereof are improved.
1 . A vibrating motor, comprising:
a housing defining an accommodating space,
a vibrating unit accommodated in the accommodating space,
an elastic piece elastically suspending the vibrating unit in the accommodating space, and
a driving assembly fixedly accommodated in the housing;
wherein the driving assembly is configured to drive the vibrating unit to vibrate; the vibrating unit comprises a mass block and a rotor fixed to the mass block; the driving assembly is one of at least one driving coil and a magnetic steel assembly; and the rotor is the other one of the at least one driving coil and the magnetic steel assembly; a first end of the elastic piece is fixed to the mass block; a second end of the elastic piece is fixed to the housing; the elastic piece and the mass block are integrally formed through stamping;
wherein the elastic piece comprises a fixing portion stacked on one side of the mass block and two elastic portions; the fixing portion is integrally formed with the mass block by stamping; the two elastic portions are respectively bent and extended from two diagonal positions of the fixing portion; each of the elastic portions comprises a first arm, a second arm, an elastic arm, and a fixing arm; each first arm is bent and extended from the fixing portion; each first arm is attached to a first side of a corresponding corner of the mass block; each second arm is extended perpendicularly from a corresponding first arm; each second arm is attached to a second side of the corresponding corner of the mass block; each elastic arm is bent and extended from the fixing portion; each elastic arm is spaced apart from the mass block; each fixing arm is bent and extended from a first end of a corresponding elastic arm away from a corresponding second arm; each fixing arm is fixed to the housing; a second end of each elastic arm close to the corresponding second arm is fixedly attached to the corresponding second arm; two elastic arms are respectively disposed on two opposite sides of the mass block; the two elastic portions are symmetrically disposed with respect to a center of the mass block.
2 . The vibrating motor according to claim 1 , wherein each first arm and each second arm are integrally formed with the mass block by stamping.
3 . The vibrating motor according to claim 1 , wherein one side of the mass block close to the driving assembly is recessed to form a mounting groove; the rotor is fixedly accommodated in the mounting groove.
4 . The vibrating motor according to claim 3 , wherein the driving assembly is the at least one driving coil fixed to the housing; the rotor is the magnetic steel assembly; the magnetic steel assembly comprises a main magnetic steel fixed in the mounting groove and at least two auxiliary magnetic steels fixed in the mounting groove; the at least two auxiliary magnetic steels are respectively disposed on two opposite sides of the main magnetic steel.
5 . The vibrating motor according to claim 4 , wherein the vibrating motor further comprises a flexible conductive connecting piece fixed in the housing; the flexible conductive connecting piece passes through the housing and extends outwards from the housing; the at least one driving coil is electrically connected to the flexible conductive connecting piece.
6 . The vibrating motor according to claim 1 , wherein the housing defines a sound outlet penetrating the housing; the vibrating unit further comprises a basin frame fixed to the housing, a vibrating system fixed to the basin frame, and a magnetic circuit system fixed to the basin frame; the magnetic circuit system is configured to drive the vibrating system to vibrate; the vibrating system is communicated with the sound outlet to generate sound; the driving assembly and the magnetic circuit system are the magnetic steel assembly; the rotor is the at least one driving coil fixed to the mass block.
7 . The vibrating motor according to claim 6 , wherein the magnetic circuit system comprises a lower clamping plate, a first main magnetic steel, an upper clamping plate, a second main magnetic steel, first auxiliary magnetic steels, and an auxiliary pole core;
wherein the first main magnetic steel is fixedly stacked on one side of the lower clamping plate close to the vibrating system; the upper clamping plate is fixedly stacked on one side of the first main magnetic steel close to the vibrating system; the second main magnetic steel is fixedly stacked on one side of the upper clamping plate close to the vibrating system; the first auxiliary magnetic steels are disposed around the first main magnetic steel; the first auxiliary magnetic steels are spaced apart from the first main magnetic steel to form a magnetic gap; the auxiliary pole core is fixedly stacked on one side of each of the first auxiliary magnetic steels close to the vibrating system; two of the first auxiliary magnetic steels are fixedly stacked on one side of the lower clamping plate close to the vibrating system; the two of the first auxiliary magnetic steels are disposed opposite to each other;
wherein the vibrating motor further comprises a fixing piece; the fixing piece is ring-shaped; a first side of the fixing piece close to the basin frame is fixed to the basin frame; the auxiliary pole core is fixed to a second side of the fixing piece away from the basin frame.
8 . The vibrating motor according to claim 7 , wherein the rotor further comprises two rotor magnetic steels and two rotor pole cores; the rotor magnetic steels are fixed to the mass block; the rotor magnetic steels are respectively disposed on two opposite sides of the first main magnetic steel; each of the two rotor pole cores is fixedly stacked on one side of a corresponding rotor magnetic steel away from the mass block; two driving coils are provided; the two driving coils are fixed to the mass block at intervals; the two driving coils are disposed between the two rotor magnetic steels.
9 . The vibrating motor according to claim 7 , wherein the vibrating system comprises a diaphragm fixed to the basin frame, a voice coil, a frame fixed to the diaphragm, and auxiliary elastic pieces; the voice coil is inserted into the magnetic gap and is suspended in the magnetic gap; the voice coil drives the diaphragm to vibrate; the auxiliary elastic pieces are spaced apart from the diaphragm; the diaphragm is fixedly clamped between the fixing piece and the basin frame; the voice coil is elastically suspended in the magnetic gap by the frame; a first end of each of the auxiliary elastic pieces is fixed to one side of the fixing piece away from the basin frame; a second end of each of the auxiliary elastic pieces is fixed to one end of the frame away from the voice coil.