CN105262264A

CN105262264A - Flat vibration motor

Info

Publication number: CN105262264A
Application number: CN201510752741.XA
Authority: CN
Inventors: 李孟昭; 李栋; 杜杰
Original assignee: Kunshan Liantao Electronics Co Ltd
Current assignee: Kunshan Liantao Electronics Co Ltd
Priority date: 2015-11-09
Filing date: 2015-11-09
Publication date: 2016-01-20

Abstract

The invention relates to a flat vibration motor. The flat vibration motor comprises an upper cover, a viscous pad, a lower cover, a center shaft, an adjusting gasket, magnetic steel, a soft circuit board, a pair of brushes, a wire, a hard circuit board, two coils, an oil bearing, a mass block and an insulation block, wherein the viscous pad is bonded on the upper cover; the center shaft is arranged on the lower cover in the riveting way; the adjusting gasket sleeves the center shaft; the magnetic steel and the soft circuit board are bonded on the lower cover; the pair of brushes are welded on the upper surface of the soft circuit board; the wire and the hard circuit board are welded on the soft circuit board; the two coils, the oil bearing, the mass block and the insulation block are eccentrically arranged on the hard circuit board; an upper annular wall sleeves the outside of a lower annular wall; and the upper annular wall and the lower annular wall are welded together through laser spot welding. The flat vibration motor is simple in structure and high in structural strength.

Description

Flat vibration motor

Technical field

The present invention relates to a kind of flat motor, particularly relate to a kind of flat vibration motor with metal chassis.

Background technology

Realize vibrating function in the environment that flat vibration motor is widely used in mobile phone, panel computer or needs vibrate, replace auditory tone cues user, avoid alarming other people or producing noise.The metal chassis of existing common flat vibration motor, comprise upper casing and lower casing, other assemblies are contained in the space of upper and lower casing composition, upper casing and lower casing are generally be fixed together by the mode of riveting or buckle, upper casing and lower casing need the structure arranging riveting or buckle, cause complex structure, the structural strength of flat vibration motor is also difficult to ensure.

Summary of the invention

The object of the present invention is to provide the flat vibration motor that a kind of structure is simple, structural strength is high.

For realizing aforementioned object, the present invention adopts following technical scheme: a kind of flat vibration motor, and it comprises upper casing, be bonded in the adhesive pad on upper casing, lower casing and the riveting central shaft on lower casing, a sheathed adjusting washer (disk) on center shaft, be bonded in the magnet steel on lower casing, flexible circuit board, be welded on a pair brush of flexible circuit board upper surface, be welded on the wire on flexible circuit board, hard circuit board, eccentric two coils be arranged on hard circuit board, one oiliness bearing, one mass and collets, the upper annular wall that described upper casing has roof and protrudes out downwards from roof periphery, the lower annular wall that described lower casing has diapire and upwards protrudes out from diapire periphery, described two coils are by certain direction coiling, linked together by the circuit on series system and hard circuit board, described hard circuit board lower surface is provided with the commutator segment with brush sliding contact, and described mass is positioned in the middle of this two coil, and described collets are overmolded onto hard circuit board, coil, on oiliness bearing and mass, become a rotor assembly, rotor assembly is rotated around central shaft by oiliness bearing, and described upper annular wall is sheathed on the outside of lower annular wall, and both by laser spot welding together.

The upper annular wall of the upper casing of flat vibration motor of the present invention is sheathed on the outside of the lower annular wall of lower casing, both by laser spot welding together, multiple positions between annular wall and lower annular wall are forever combined, design like this, upper casing and lower casing structure simple, convenient manufacture, structural strength is high, reduces production cost.

Accompanying drawing explanation

Fig. 1 is the schematic perspective view of the present invention half flat vibration motor.

Fig. 2 is the schematic perspective view that the present invention half flat vibration motor upper casing and other parts are separated.

Fig. 3 is the three-dimensional exploded view of half flat vibration motor of the present invention.

Embodiment

Refer to shown in Fig. 1 to Fig. 3, flat vibration motor 100 of the present invention comprises upper casing 11, the adhesive pad 12 be bonded on upper casing 11, lower casing 13 and the riveting central shaft 14 on lower casing 13, a sheathed adjusting washer (disk) 15 on a central shaft 14, the magnet steel 16 be bonded on lower casing 13, flexible circuit board 21, a pair brush 22 being welded on flexible circuit board 21 upper surface, the wire 23 be welded on flexible circuit board 21, hard circuit board 31, eccentric be arranged on two coils 32, oiliness bearing 40, mass 50 on hard circuit board 31 and collets 60.

The upper annular wall 112 that upper casing 11 has roof 111 and protrudes out downwards from roof 110 periphery, upper annular wall 112 root edge offers isolated some breach 113.

The lower annular wall 132 that lower casing 13 has diapire 131 and upwards protrudes out from diapire 131 periphery, lower annular wall 132 apical margin is provided with the some protuberances 133 protruded laterally, protuberance 133 and breach 113 one_to_one corresponding, upper annular wall 112 is sheathed on outside lower annular wall 132, both contact, protuberance 133 is contained in breach 113, upper casing 11 is avoided to rotate relative to lower casing 13, also by the mode of laser spot welding between upper annular wall 112 and lower annular wall 132, multiple positions between annular wall 112 and lower annular wall 132 are forever combined, design like this, upper casing 11 is simple with lower casing 13 structure, convenient manufacture, structural strength is high, reduce production cost.

Magnet steel 16 has four pole magnetic pole characteristics.

Wire 23 is covered with the weld of flexible circuit board 21 by UV glue 24, is sealed, and avoids wire 23 to come off.

Hard circuit board 31 lower surface has commutator segment, with the sliding contact of brush 22 head, forms complete circuit.

This two coil 32 is by certain direction coiling, is linked together by the circuit on series system and hard circuit board 31.

Mass 50 is positioned in the middle of this two coil 32.

Collets 60 are overmolded onto on hard circuit board 31, coil 32, oiliness bearing 40 and mass 50, and become a rotor assembly, rotor assembly is rotated around central shaft 14 by oiliness bearing 40, produce centrifugal force, vibrate.

When flat vibration motor 100 of the present invention works, external power source, successively after wire 23, flexible circuit board 21, brush 22 transfer to hard circuit board 31, arrives coil 32, makes coil 32 produce magnetic field, the magnetic field interaction that magnetic field and magnet steel produce, impels rotor assembly to produce vibration force.

Although be example object, disclose the preferred embodiment of the present invention, but those of ordinary skill in the art will recognize, when not departing from scope and spirit of the present invention disclosed in appending claims, various improvement, increase and replacement are possible.

Claims

1. a flat vibration motor, it comprises upper casing, be bonded in the adhesive pad on upper casing, lower casing and the riveting central shaft on lower casing, a sheathed adjusting washer (disk) on center shaft, be bonded in the magnet steel on lower casing, flexible circuit board, be welded on a pair brush of flexible circuit board upper surface, be welded on the wire on flexible circuit board, hard circuit board, eccentric two coils be arranged on hard circuit board, one oiliness bearing, one mass and collets, the upper annular wall that described upper casing has roof and protrudes out downwards from roof periphery, the lower annular wall that described lower casing has diapire and upwards protrudes out from diapire periphery, described two coils are by certain direction coiling, linked together by the circuit on series system and hard circuit board, described hard circuit board lower surface is provided with the commutator segment with brush sliding contact, and described mass is positioned in the middle of this two coil, and described collets are overmolded onto hard circuit board, coil, on oiliness bearing and mass, become a rotor assembly, rotor assembly is rotated around central shaft by oiliness bearing, it is characterized in that: described upper annular wall is sheathed on the outside of lower annular wall, and both by laser spot welding together.

2. electric connector according to claim 1, it is characterized in that: described upper annular wall root edge offers isolated some breach, described lower annular wall apical margin is provided with the some protuberances protruded laterally, protuberance and breach one_to_one corresponding, described protuberance is contained in breach, avoids upper casing to rotate relative to lower casing.

3. electric connector according to claim 1, is characterized in that: the weld of described wire and flexible circuit board is covered by UV glue, sealed.