CN1066588C - Fixed shaft type vibration motor - Google Patents

Abstract

To reduce a brake loss or mechanical noise by providing oil barrier means between a bearing portion and a commutator arranged at a side of a rotor for preventing the arrival of oil content to the commutator. A housing H is constituted with a bracket 2 fitted in a bracket 2 between a shallow, inverted dish-shaped case 1 and an opening of the case 1, a holder 2a is raised at the center of this case 1, one end 3a of a shaft 3 is pressed in here and held, and a rotor R being eccentric from the other end 3b of the shaft 3 is supported in a freely rotatable manner. A ring-shaped projection 4 is raised from the rotor R through a bearing portion Ra at the center and a partition wall Rb continuing to the bearing Ra. Another ring-shaped groove 4a is provided in a projection 4, and oil barrier film OB is formed by coating a fluorocarbon-based solution including the groove 4a. By doing this, oil leak can be prevented by the oil barrier film OB coating the projection 4.

Description

The fixed shaft type vibrating motor

The present invention relates to a kind of noiseless device for informing, and be applied in a kind of fixed shaft type motor in vibrating motor, the miniature gear drive motor as portable communication appts one class.

A kind of noiseless device for informing (mode) as the portable device for informing of beep-pager and so on adopts the good small-sized DC motor of efficient more, on the rotating shaft that leans out the casing outside, eccentric hammer is housed, and utilizes the disequilibrium of this eccentric hammer, can obtain vibration.

Recently,, no longer rely on output shaft, just and rely on the new technology that the off-centre design of built-in rotor can obtain to vibrate (consult special fair 7-85636 number etc.) if begin to have occurred a kind of vibration of wanting to obtain.

This kind passes through the built-in eccentric rotor of rotation, and need not rely on the motion of rotating shaft, is that this request for proposal people at first is willing to propose among the flat 7-264831 with the spy at the fair 6-81443 of spy number.

Promptly, shown in the 1st figure, the 4th figure in the fair 6-81443 of spy number like that, one side of the casing that is made of frame and carriage is being fixed a certain end of axle, and this is gone up rotation and is supporting eccentric rotor near the open end freely, is embedded with the bearing that forms one with rotor between this and the rotor.

Foregoing shaft fixed vibrating motor, because its axle has adopted rotation mode, so the bearing that there is no need again to require to be configured on the casing should have high-axiality each other, simple structure in addition, output is big, and market has bright prospects.

Because reducing of the volume of battery that is adopted in the present portable instrument own, its capacity is also corresponding to diminish, and therefore, people are expecting to reduce the energy by the part institute consuming cells that the vibrating motor class is housed as far as possible.

Therefore,, reach the purpose that lowers the sliding friction noise, then must add lubricated wet goods quasi-grease allowing in the sliding process of resin own in order to reduce the brake loss between the slipper in the motor.

But, in case this lubricant component enters in the commutator, both just adopted lubricating oil also not satisfactory with electric conductivity.

The object of the present invention is to provide a kind of fixed shaft type vibrating motor, it is in order to reduce brake loss and mechanicalness noise, by the lubricated wet goods composition in the slipper in the fixed shaft type motor and be equipped with simple structure, control lubricant component and be leaked to the possibility of going in the commutator.

For achieving the above object, the present invention takes following technical scheme:

A kind of fixed shaft type motor, wherein, an end of axle is being fixed in the part position of casing, and on this axle, by the bearing portion of containing lubricating oil family at the center of being configured in, rotation is installed with rotor freely, it is characterized in that:

For preventing that grease from entering commutator, between the commutator of a side that is disposed at aforementioned rotor and aforementioned bearings portion, be provided with the lubricating oil insulating barrier.

Described fixed shaft type motor is characterized in that:

Be provided with annular projection as the lubricating oil seal, this projection is outside by elongation in the rotor, and this projection is carried out the coating processing of fluorine solution.

Described fixed shaft type motor is characterized in that:

For obtaining certain anchor ring gap from projection, and prevent the wearing and tearing that the lubricating oil insulating barrier is filmed, projection is provided with annular groove.

Described shaft fixed motor is characterized in that:

Projection is by resin material with rotor, forms by one-piece casting.

Described fixed shaft type motor is characterized in that:

Vibrate for allowing rotor self produce, and adopted eccentric rotor.

Described fixed shaft type motor is characterized in that:

Be to adopt gearmotor, pinion is in commutator one side of rotor, and constitutes an integral body.

To sum up consider, one end of axle is fixed on a certain position of housing, and contain the axle support of oil component by being configured in centre position place, rotor rotation is assemblied on the aforementioned axis freely, and and rotor form and manage to prevent that grease is leaked in the commutator goes between the commutator of one and the bearing portion.

For preventing the leakage of lubricant component, adopted bearing portion and commutator isolated among the present invention, and a kind of lubricating oil insulating barrier is set betwixt, reach the anti-leak purpose, be specially: as a kind of means of lubricating oil insulating barrier, along a side of rotor, and extend along rotor annular projection is set, and the coating that this convex surfaces is carried out fluorine solution is handled.

Simultaneously, be in above-mentioned projection, to obtain the anchor ring gap, and prevent from annular groove to be set the wearing and tearing that the lubricating oil insulating barrier is filmed, and should projection and rotor design be integral, and water with resin material and to build up an integral body.

In addition, produce vibration for making motor, the selectable eccentric rotor, be about to a plurality of motor subcoils, it is one-sided that biasing is provided in rotor, can prevent to have the coil that drives function like this and concentrate on the bob-weight heart one side.

In addition, for selecting gearmotor, also can adopt decommuntation device one side that pinion is placed on rotor, and it is designed to as a whole.

Like this, utilize the lubricating oil insulation mode, can prevent just that lubricant component in the bearing portion is leaked in the commutator.

If the lubricating oil insulating barrier is chosen to convex shape, just can be lubricated the coating processing that oil-insulation holds liquid to its surface simply, because of entering not easy consumption of the interior lubricating oil insulating coating film of annular groove, so can keep lubricating oil insulating barrier effect for a long time.

The present invention has positive effect:

The present invention, adopt aforesaid simple structure, just can prevent that lubricant component that the lubricating oil of bearing portion produces from proceeding in the commutator goes, thereby when promptly having sought to reduce brake loss and mechanicalness noise, provide a kind of a kind of fixed shaft type motor that satisfactorily resolves the existing problem in rectification aspect again.

In addition, in case select as above structure, then aspect axle fixing, no longer needed rotating output shaft, so structural design is to be suitable for very much vibrating motor and the miniature gear drive motor uses.

Following with reference to accompanying drawing, describe embodiments of the invention in detail:

Fig. 1 represents not have as first kind of embodiment fixed shaft type platypelloid type of fixed shaft type motor of the present invention the sectional arrangement drawing of core type vibrating motor major part.

Fig. 2 represents the sectional arrangement drawing of the modification major part of same embodiment.

Fig. 3 represents not have as second kind of embodiment fixed shaft type platypelloid type of the modification of embodiment of the same race of the present invention the sectional arrangement drawing of core type gearmotor major part.

Below, as first kind of embodiment of the present invention,, introduce the structure that the fixed shaft type platypelloid type with flat converter does not have the core type vibrating motor with reference to the sectional arrangement drawing of major part in the motor shown in Figure 1.

Casing H among Fig. 1, the very shallow plate-like housing 1 of the degree of depth of placing by standing upside down constitutes with the carriage 2 that is embedded in the peristome place of this housing 1, the centre of this housing 1 is provided with bearing pedestal 2a, one end 3a of axle 3 is pressed in the bearing pedestal, on this other end 3b of 3, rotation is installed with eccentric rotor R freely.

This rotor R is to be made by the synthetic resin material J with good sliding capability.Its shape is the plate commutator C that is made of printed circuit board (PCB) and is offset to this commutator one side, and be assemblied in commutator on one-sided a plurality of core motor subcoil L combinations and constitute the non-circular plate shape of an integral body, in the center, be provided with annular projection, plate commutator, isolated by comparing big hundreds of microns isolation part Rb with axle 3 than the Ra of bearing portion of axle 3 slightly larger in diameter numbers micron and axle.

On this projection 4, have annular groove 4a.By the coating of projection and annular groove enforcement fluorine solution is handled, just can form a kind of lubricating oil insulating coating film OB on its surface.

M is a magnet, and this magnet can provide a kind of magneticaction to aforementioned eccentric rotor R by space vertically, and aforementioned dull and stereotyped commutator C is installed with a pair of brush B, B1 by brush bearing 5, and the front end of brush provides electric power by the crimping with commutator.

Because brush is to the slip crimping effect of commutator, the rotor capacitation makes the slipping mutually of top of top support Rc and housing.

In addition, contents such as the configuration structure of the structure of magnetic pole of relevant magnet M, the core motor subcoil L of eccentric rotor R, drive principle, because of not belonging to the scope of the present application, its explanation of Therefore, omited, details please refer to special hope flat 7-26483 number etc.

In case employing aforementioned structure, for purpose lubricated, noise reduction, in bearing portion, put into lubricated wet goods lubricant component, handle by the coating of on projection 4, being carried out, be the effect of lubricating oil insulating coating film OB, can prevent just that lubricant component from leaking among the plate commutator C.

On the other hand,, can consider synthetic resin material J is changed high specific gravity material (density is 8 grades) in the major part profile as shown in Figure 2, bearing portion be changed into the form of sintered type oiliness bearing 6 as the change form of aforementioned the 1st kind of embodiment.

In addition, make second kind of embodiment of the present invention, consult the sectional arrangement drawing of major part shown in Figure 3, the part that is applied to the miniature gear drive motor once is described.

As shown in Figure 3, generally speaking, it is an integral body that pinion 6 does not have core type rotor R 1 with rotary-type platypelloid type, promptly, support Rc among aforementioned first kind of embodiment is uprised, and will change pinion 6 here into, the side with housing 11 is designed to opening 11a shape simultaneously, allows the horizontal gear 7 shown in dotted line among the figure be meshed with aforementioned miniature gear 6.In order to prevent the loss of magnetic circuit, at the opposition side of this horizontal gear 7, promptly, avoid outside the outer diameter flat of horizontal gear 7, the attached deflecting coil 8 that helps is being fixed at place, the top of housing 11.

Claims (6)

1, a kind of fixed shaft type motor, wherein, an end of axle is being fixed in the part position of casing, and on this axle, by the bearing portion of containing lubricating oil family at the center of being configured in, rotation is installed with rotor freely, it is characterized in that:

For preventing that grease from entering commutator, between the commutator of a side that is disposed at aforementioned rotor and aforementioned bearings portion, be provided with the lubricating oil insulating barrier.

2, fixed shaft type motor as claimed in claim 1 is characterized in that:

Be provided with annular projection as the lubricating oil seal, this projection is outside by elongation in the rotor, and this projection is carried out the coating processing of fluorine solution.

3, fixed shaft type motor as claimed in claim 2 is characterized in that:

For obtaining certain anchor ring gap from projection, and prevent the wearing and tearing that the lubricating oil insulating barrier is filmed, projection is provided with annular groove.

4, as each the described shaft fixed motor in the claim 1～3, it is characterized in that:

Projection is by resin material with rotor, forms by one-piece casting.

5, fixed shaft type motor as claimed in claim 4 is characterized in that:

Vibrate for allowing rotor self produce, and adopted eccentric rotor.

6, fixed shaft type motor as claimed in claim 4 is characterized in that:

Be to adopt gearmotor, pinion is in commutator one side of rotor, and constitutes an integral body.

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