CN202353417U

CN202353417U - Minitype vibration motor

Info

Publication number: CN202353417U
Application number: CN2011204786369U
Authority: CN
Inventors: 杨华新; 杨鑫峰; 夏伟
Original assignee: Goertek Inc
Priority date: 2011-11-26
Filing date: 2011-11-26
Publication date: 2012-07-25
Anticipated expiration: 2021-11-26

Abstract

The utility model discloses a minitype vibration motor. The minitype vibration motor comprises an external frame which is composed of a top surface, a bottom surface and side faces, as well as a vibration unit and an electromagnet which are contained in the external frame, wherein the vibration unit is arranged in the external frame in a suspension manner, the vibration unit and the electromagnet are positioned on the same flat surface which is parallel with the bottom surface of the external frame, and the vibration direction of the vibration unit is parallel with the bottom surface of the external frame; the vibration unit comprises a permanent magnet and a magnetic conductor which is combined with one magnet pole of the permanent magnet, and the magnetization direction of the permanent magnet is perpendicular to the extending direction of the electromagnet; the magnetic conductor comprises a combining part which is arranged on the middle of the magnetic conductor and is bound with one magnet pole of the permanent magnet and extending parts which are positioned on the two ends of the magnetic conductor and respectively extended to the two ends of the electromagnet; and gaps are reserved among the extending parts and the permanent magnet, and a bonding layer is filled in each gap. The structure can be used for improving the stability of combination of the magnetic conductor and the permanent magnet, thereby improving the performance of the minitype vibration motor.

Description

The micro-vibration motor

Technical field

The utility model relates to machine field, is specifically related to a kind of micro-vibration motor.

Background technology

A kind of micro-vibration motor of the prior art comprises external frame, the electromagnet that contains vibration unit in the external frame and be oppositely arranged with vibration unit; Vibration unit comprises permanent magnet and the magnetic conductor that combines with permanent magnet, and the end of magnetic conductor is provided with the extension that extends to the both ends of electromagnet, in order to prevent magnet short-cut path, is provided with the gap of certain distance between extension and the permanent magnet.But the micro-vibration motor of this structure, magnetic conductor only have the one side combine through modes such as bondings with permanent magnet, in conjunction with firmness not enough, make the stability of product not strong.Therefore, be necessary the micro-vibration motor of said structure is improved, to avoid above-mentioned defective.

Summary of the invention

The utility model technical problem to be solved is: a kind of micro-vibration motor is provided, can improves the firmness that combines between permanent magnet and the magnetic conductor, improve the stability of micro-vibration motor.

For solving the problems of the technologies described above, the technical scheme of the utility model is: the micro-vibration motor comprises:

The external frame that constitutes by end face, bottom surface and side;

Be contained in vibration unit and the vibrative electromagnet of driving vibration unit in the said external frame; Said vibration unit is suspended in the said external frame through elastic supporting member for supporting optical member; Said vibration unit and said electromagnet place on the same plane that is parallel to the external frame bottom surface, and the direction of vibration of said vibration unit is parallel to the bottom surface of said external frame;

Said vibration unit comprise permanent magnet and with a magnetic conductor that magnetic pole combines of said permanent magnet, the direction of magnetization of said permanent magnet is perpendicular to the bearing of trend of said electromagnet;

Said magnetic conductor comprises and is positioned at the joint portion that magnetic pole middle part and said permanent magnet is fitted; And the extension that extends towards said electromagnet both ends respectively that is positioned at two ends; Have the gap between said extension and the said permanent magnet, in said gap, be filled with adhesive linkage.

In addition, preferred scheme is that said adhesive linkage is a colloid.

In addition, preferred scheme is that the bearing of trend of said extension is perpendicular to the bearing of trend of said electromagnet.

After having adopted technique scheme; The beneficial effect of the utility model is: compare with traditional structure, the utility model is dosed adhesive linkage in the extension at magnetic conductor two ends and the gap between the permanent magnet, and this adhesive linkage can directly adopt colloid; Make three of permanent magnet to combine with magnetic conductor; Increased bonded area, improved the firmness that magnetic conductor combines with permanent magnet, thereby improved the micro-vibration motor properties.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

Fig. 1 is the perspective exploded view of the utility model micro-vibration motor;

Fig. 2 is the perspective view after the utility model micro-vibration motor removes groove shape housing;

Fig. 3 is the vertical view of the utility model micro-vibration motor permanent magnet and magnetic conductor.

Among the figure: 11. end faces, 12. bottom surfaces, 13. sides, 14. wiring boards, 2. electromagnet, 21. coils, 22. iron cores, 31. permanent magnets, 32. magnetic conductors, 321. joint portions, 322. extensions, 4. mass, 5. elastic supporting member for supporting optical member, 6. adhesive linkage.

Embodiment

Extremely shown in Figure 3 like Fig. 1; The micro-vibration motor comprises the external frame that is made up of end face 11, bottom surface 12 and side 13; Wherein, bottom surface 12 constitutes groove shape housing with side 13, and end face 11 is connected on the lid on this groove shape housing for lid; 12 outer surface also is combined with wiring board 14 in the bottom surface, and wiring board 14 is used to be electrically connected micro-vibration motor internal circuit and external electronic circuits.

Externally contain vibration unit in the framework and be used to drive the vibrative electromagnet 2 of vibration unit.Electromagnet 2 is fixed in the external frame, comprises iron core 22 and is wound in the coil 21 on the iron core 22, and coil 21 is electrically connected with wiring board 14.Vibration unit is suspended in the external frame through elastic supporting member for supporting optical member 5; Vibration unit and electromagnet 2 place on the same plane that is parallel to external frame end face 11 and bottom surface 12; And the direction of vibration of vibration unit is parallel to the end face 11 and the bottom surface 12 of external frame, by elastic supporting member for supporting optical member 5 elastic deformation is provided in the vibration unit vibration processes.This micro-vibration motor has reduced thickness of product, has realized the slimming of product.

Vibration unit comprises permanent magnet 31, magnetic conductor 32 and the mass 4 that combines successively.Magnetize with external frame bottom surface 11 parallel directions in permanent magnet 31 edges, and the direction of magnetization is perpendicular to the bearing of trend of electromagnet 2.Magnetic conductor 32 combines with a magnetic pole of permanent magnet 31, comprises being positioned at the joint portion 321 of the fitting middle part with magnetic pole permanent magnet 31, and the extension 322 that extends towards electromagnet 2 both ends respectively that is positioned at two ends; Joint portion 321 combines through modes such as bondings with permanent magnet 31, and the bearing of trend of extension 322 is perpendicular to the bearing of trend of electromagnet 2.In order to prevent magnet short-cut path, has the gap of certain width between extension 322 and the permanent magnet 31, in this implementation process; Be provided with adhesive linkage 6 in the gap between extension 322 and the permanent magnet 31; This adhesive linkage 6 can adopt the non-magnet material of double spread, also can directly use colloid, and extension 322 and permanent magnet 31 are used to bond; Thereby what make permanent magnet 31 and magnetic conductor 32 combines more firmly, has improved the stability of micro-vibration motor.And add the weight that adhesive linkage 6 has increased vibration unit, reduced the resonance frequency f0 of micro-vibration motor.

The operation principle of micro-vibration motor is following: the magnetic conductor 32 that combines with 31 1 magnetic poles of permanent magnet is by permanent magnet 31 magnetization, and two extension 322 magnetic poles of magnetic conductor 32 ends are identical.After coil 21 connects the signal of telecommunication through wiring board 14; Electromagnet 2 two ends present certain polarity; Extension 322 effects with two same pole of magnetic conductor 32; Inhale principle mutually according to the homopolar-repulsion heteropole, and because electromagnet 2 is fixed with respect to external frame, so permanent magnet 31 receives active force and drives vibration unit and under the support of elastic supporting member for supporting optical member 5, move.When the signal of telecommunication was AC signal, the polarity at electromagnet 2 two ends changed alternately, and alternation can take place the force direction that permanent magnet 31 receives, thereby made the vibration unit double vibrations produce the sense of shaking.

Under the above-mentioned instruction of the utility model; Those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description; And these improvement and distortion all drop in the protection range of the utility model, and those skilled in the art should be understood that; Above-mentioned specific descriptions are just better explained the purpose of the utility model, and the protection range of the utility model is limited claim and equivalent thereof.

Claims

1. micro-vibration motor comprises:

The external frame that constitutes by end face, bottom surface and side;

Be contained in vibration unit and the vibrative electromagnet of driving vibration unit in the said external frame; Said vibration unit is suspended in the said external frame through elastic supporting member for supporting optical member; Said vibration unit and said electromagnet place on the same plane that is parallel to the external frame bottom surface, and the direction of vibration of said vibration unit is parallel to the bottom surface of said external frame; It is characterized in that:

2. micro-vibration motor as claimed in claim 1 is characterized in that: said adhesive linkage is a colloid.

3. micro-vibration motor as claimed in claim 1 is characterized in that: the bearing of trend of said extension is perpendicular to the bearing of trend of said electromagnet.