CN202160087U

CN202160087U - Improved linear oscillation motor

Info

Publication number: CN202160087U
Application number: CN2011202936431U
Authority: CN
Inventors: 周建平; 孙安; 何威
Original assignee: Zhejiang Dongyang Chengji Electric Motor Co Ltd
Current assignee: Zhejiang Dongyang Chengji Electric Motor Co Ltd
Priority date: 2011-08-15
Filing date: 2011-08-15
Publication date: 2012-03-07
Anticipated expiration: 2021-08-15

Abstract

The utility model relates to an improved linear oscillation motor belonging to the technical field of oscillation motor manufacture. The technical scheme adopted by the linear oscillation motor is that the linear oscillation motor comprises a lower bracket and an inverted cup-shaped housing connected with the upper bracket; a spring leaf, a fixed sleeve, oscillation hammers, a steel magnet, a yoke, coils, a foam, an electric brush substrate and magnetic fluids are arranged in the housing; the oscillation hammers are arranged at the lower end of the small end surface of the spring leaf so as to prevent the oscillation hammers from touching the spring leaf and noise is avoided; the magnetic fluids are added on the side surfaces of the steel magnet and the yoke, and between the coils so as to allow the oscillation hammers to have stable friction resistance; when the motor is powered off, the oscillation hammers stop immediately; the foam is arranged on the upper surface of the middle of the lower bracket so as to damp the impact of the oscillation hammers on the motor housing in the oscillatory processing, and the damage to the motor housing is avoided.

Description

A kind of improved linear vibration motor

Technical field

The utility model relates to a kind of improved mobile phone and uses linear vibration motor, belongs to mobile phone with linear vibration motor product manufacturing technology field.

Background technology

The linear vibration motor of prior art, as shown in Figure 1, mainly form with the casing of falling the cup-shaped that is that is connected with bottom bracket by bottom bracket, be provided with spring leaf, fixed cover, vibration hammer, magnet steel, yoke, coil and brush substrate and magnetic fluid in the casing.The spring bilge construction shape that spring leaf is large end face and small end face and is connected them. large end face links to each other with the casing top inner wall, and small end face is connected with the last plane of fixed cover.The fixed cover periphery is provided with vibration hammer, the yoke that the inside center place is provided with magnet steel and is fixedly connected with the magnet steel lower end. with magnet steel below be provided with coil on the corresponding bottom bracket upper surface. coil is corresponding to the gap between magnet steel and the fixed cover.Magnetic fluid is added on the upper surface of spring leaf small end face and the lower surface of yoke. and the upper surface of bottom bracket is provided with the brush substrate.In this technical scheme because the position of vibration hammer setting is at grade with the position of spring leaf small end face, so thereby vibration hammer regular meeting and spring leaf when vibration bump the generation vibrating noise.Be to reduce vibrating noise, add magnetic fluid, utilize oscillation intensity that the effect buffering vibration of magnetic fluid hammers into shape to alleviate collision noise at the lower surface of the upper surface of spring leaf small end face and yoke.But because this technical scheme is usually unmanageable very accurate to the quantity of adding magnetic fluid in implementation process, thereby cause product percent of pass low.After brush substrate energized; Coil produces the both positive and negative polarity conversion of the N utmost point and the S utmost point immediately; This N utmost point of coil and the conversion of the S utmost point make the N utmost point that magnet steel itself is had and the S utmost point be in the same sex state that there is a natural attraction between the sexes that repels each other; Because fixed cover has the vibration hammer even load, thus in vibration processes vibration hammer easily with casing inner wall collision generation noise, and magnet steel and fixed cover do not have fixed bit; Vibration hammer also can produce offset collisions and cause coil to come off in vibration processes, make the motor can't operate as normal.

Summary of the invention

For solving the problem of above-mentioned existence; The utility model provides a kind of improved mobile phone to use linear vibration motor; Through implementing this technical scheme, make vibration hammer in motion process, can't contact, thereby avoided the generation of collision with spring leaf. reduce generation of noise.Simultaneously magnetic fluid is added between the side and coil of magnet and yoke; Make vibration hammer in vibration processes, have more stable frictional resistance; Thereby realize that motor stops rapidly in motor outage back because the existence of frictional resistance can slow down the inertia of vibration hammer like this, solved the long problem of motor dwell time.

The above-mentioned purpose of the utility model realizes through following technical scheme; A kind of mobile phone is used linear vibration motor, like Fig. 2

Shown in, it mainly is made up of with the casing that is down cup-shaped that is connected with bottom bracket bottom bracket, and spring leaf, fixed cover, vibration hammer, magnet steel, yoke, coil, foam and brush substrate and magnetic fluid are set in the casing.Spring leaf is formed with the spring portion that is connected them by being little the reaching in big lower end, upper end; The large end face of spring leaf links to each other with the inner surface of upper end in the casing; Small end face is connected with the last plane of fixed cover, and the fixed cover periphery is provided with vibration hammer, and vibration hammer is arranged on the lower end of spring leaf small end face.The yoke that fixed cover inside center place is provided with magnet steel and is fixedly connected with the magnet steel lower end.With magnet steel below be provided with coil on the corresponding bottom bracket upper surface, coil is arranged on corresponding to the gap between magnet steel and the fixed cover. magnetic fluid is added between the side and coil of magnet steel and yoke. be provided with the flexible member foam at the upper surface of bottom bracket corresponding to the position, middle of magnet steel.The brush substrate is arranged on the upper surface of bottom bracket and has an end to stretch out outside the casing. after brush substrate energized; Coil produces the magnetic field of the mutual alternate of both positive and negative polarity immediately. the magnetic field of this mutual alternate; Make the N utmost point that magnet steel itself is had and the S utmost point under the same sex is repelled each other the effect of principle of opposite sex attraction; Magnet steel just produces the magnetic field along with the mutual alternate between the N utmost point and the S utmost point; Thereby drive the vibration hammer that is connected with fixed cover and do straight-line oscillation up and down. because vibration hammer is arranged on spring leaf small end face lower end and links to each other with fixed cover; Thereby vibration hammer can not collide with spring leaf when making up-down vibration; Thereby can not produce the bath sound. magnetic fluid is added between side and the coil of magnet and yoke makes vibration hammer that more stable frictional resistance arranged in vibration processes simultaneously; Like this in motor outage back because the existence of frictional resistance can slow down the inertia of vibration hammer vibration, thereby the function that vibration hammer is reached stop rapidly. be provided with the flexible member foam at the upper surface of bottom bracket corresponding to the position, middle of magnet steel equally, the effect of foam can slow down vibration hammer cushioning effect to casing in vibration processes equally.

Description of drawings

Fig. 1 is the linear vibration motor product structure sketch map of prior art.

Fig. 2 is the linear vibration motor product structure sketch map after improving.

Embodiment

Below in conjunction with accompanying drawing, provide embodiment to the utility model, the technical scheme after improving is further specified.

Embodiment 1;: as shown in Figure 2; Linear vibration motor after a kind of the improvement; It mainly is made up of with 5 of the casings that is down cup-shaped that is connected with bottom bracket 1 bottom bracket 1, and spring leaf 7, fixed cover 9, vibration hammer 6, magnet steel 8, yoke 4, coil 3, foam 11 and brush substrate 2 and magnetic fluid 10 are set in the casing 5.The spring bilge construction that spring leaf 7 is large end face and small end face and is connected them. large end face links to each other with casing 5 top inner wall; Small end face is connected with the last plane of fixed cover 9; Fixed cover 9 peripheries are provided with vibration hammer 6, and vibration hammer 6 is arranged on the lower end of spring leaf 7 small end faces.Fixed cover 9 inside center places be provided with magnet steel 8 and the yoke 4. that is fixedly connected with magnet steel 8 lower surfaces with magnet steel 8 below be provided with coil 3 on corresponding bottom bracket 1 upper surface; Coil 3 is arranged on corresponding to the gap between magnet steel 8 and the fixed cover 9. and magnetic fluid 10 is added between the side and coil 3 of magnet steel 8 and yoke 4. and be provided with flexible member foam 11. brush substrates 2 at the upper surface of bottom bracket 1 corresponding to the position, middle of magnet steel 8 and be arranged on the upper surface of bottom bracket 1 and have an end to stretch out outside the casing 5. after brush substrate 2 energized; Coil 3 produces the magnetic field of the mutual alternate of both positive and negative polarity immediately; The N utmost point and S pole field that the magnetic field of this mutual alternate and magnet steel 8 itself are had interact; According to the same sex principle of opposite sex attraction that repels each other; The mutual alternate of magnet steel 8 magnetic poles has driven the coupled fixed cover that connects 9 and vibration hammer 6 and has done straight-line oscillations up and down. because vibration hammer 6 is arranged on the end under spring leaf 7 small end faces and links to each other with fixed cover 9; So just can not collide spring leaf 7 when vibration hammer 6 is done straight-line oscillation up and down; Thereby just can not produce the bath sound. simultaneously with magnetic fluid 10 be added on magnet steel 8 and yoke 4 side and coil 3 between make vibration hammer 6 in vibration processes, have more stable frictional resistance; Thereby because can slowing down the inertia of vibration hammer 6 vibrations, the existence of frictional resistance make vibration hammer 6 reach the function that stops rapidly in motor outage back like this. be provided with flexible member foam 11 at the upper surface of bottom bracket 1 corresponding to the position, middle of magnet steel 8 equally, the effect of foam 11 can slow down vibration hammer 6 cushioning effect to casing 5 in vibration processes equally.

Claims

1. improved linear vibration motor; Mainly form with the casing of falling the cup-shaped (5) that is that is connected with bottom bracket (1) by bottom bracket (1); Being provided with spring leaf (7), fixed cover (9), vibration hammer (6), magnet steel (8), yoke (4), coil (3) and brush substrate (2) in the casing (5) forms; It is characterized in that: add magnetic fluid (10) between the side of magnet steel (8) and yoke (4) and the coil (3), the upper surface of bottom bracket (1) is provided with elastic foam (11) corresponding to the position, middle of magnet steel (8). and vibration hammer (6) is arranged on the lower end of spring leaf (7) small end face.

2. a kind of improved linear vibration motor according to claim 1 is characterized in that: vibration hammer (6) is arranged on the lower end of spring leaf (7) small end face, and going up the plane apart from fixed cover (9) is the position of H=0.1 ~ 0.25mm.

3. a kind of improved linear vibration motor according to claim 1 is characterized in that: the inner surface of bottom bracket is provided with elastic foam (11) corresponding to the middle of magnet steel, and its external diameter equates that with the external diameter of magnet steel thickness is between 3 ~ 5mm.