CN2632811Y - Spindle motor core-adjustable devices - Google Patents

Abstract

The utility model discloses a spindle motor core-adjustable device, comprising a fixed part which is arranged on the surface of a rotor of the spindle motor and a plurality of core adjusting clip groups. The center of the fixed part is provided with a hole to position the axis core of the spindle motor. The length direction of the core adjusting clip groups extends along the circumference direction of the rotor.

Description

The Spindle Motor core adjusting device

Technical field

The utility model relates to a kind of Spindle Motor (spindle motor) core adjusting device (centeringdevice), especially about a kind of core adjusting device that is used on the slim Spindle Motor disc (disk) aligning that is installed in.

Prior art

The prosperity of information makes the development of information storage media enjoy attention, and at this wherein, Spindle Motor is being played the part of important role.Spindle Motor is a kind of miniature motor, is the at present the most frequently used drive unit that impels such as the running of information storage medias such as CD-ROM drive, disc driver.The form of Spindle Motor has a variety of, but main assembly has included a loading end, a rotating shaft, a rotor and a stator, wherein loading end can be the surface of a carrier of other setting or the surface of motor rotor itself, is used for carrying and drive a disk sheet or discs.

Because the running speed when Spindle Motor drives the discs rotation reaches the thousands of commentaries on classics of per minute (thousands of rpm) above (particularly being applied in the DVD-ROM occasion), therefore, for discs beat precision diametrically very high requirement is arranged usually.The endoporus tolerance of general optical disk has 0.15mm at least, and this internal diameter error has very big influence for the beat precision that the footpath makes progress.In order to reduce the radial beat that error caused that prevents the discs internal diameter even, by being set on the Spindle Motor, a core adjusting device that is used for fixing discs prevents the precision that the radial beat of discs reads, regenerates and note down with raising usually.In addition, because the volume of Spindle Motor is very little, the core adjusting device that therefore is applied to the Spindle Motor of information storage medias such as DVD-ROM and CD-ROM can be provided with a pilot hole that allows Spindle Motor block in the scope of diameter 15.0mm to 15.15mm.See also Figure 1A and Figure 1B, show the vertical view and the sectional view of an existing Spindle Motor core adjusting device respectively.

Shown in Figure 1A and 1B, the axle core 2 of Spindle Motor 1 is accepted by bearing 3 and pad 4, and is fixed on the stator 5.Be wound with coil 6 on the stator 5.Comprise permanent magnet 8 on the rotor 7, prevent the anti-slide plate 9 of discs slip usefulness and the core adjusting device 10 of a discs.Core adjusting device 10 comprises the accent core shell fragment 10a and the fixed part 10b of resin material.See also Fig. 2, after the assembling of each parts was finished, the length direction of transferring core shell fragment 10a was along axial stretching, extension, and utilize itself bounce and with discs 13 centering adjustments.

In addition, shown in Fig. 3 A and Fig. 3 B,, a carrier 14 also can be set in addition on the surface of motor rotor, be used for carrying and drive a discs at another existing Spindle Motor core adjusting device, and utilize transfer core shell fragment 15 and fixed part 16 finish discs to core.

Yet along with the continuous slimming of motor thickness, the resin system of above-mentioned existing core adjusting device transfers the core shell fragment can be restricted and shorten in axial length, thereby makes bounce become big, and then allows discs that the problem that can't fix takes place when packing into.In addition, transfer the core shell fragment repeatedly with the resin fatigue that is produced for shell fragment itself after discs contact and at high temperature incidental wriggling (creep) problem all can make the accent core shell fragment that has core adjusting device now to play a role.

For this reason, the present invention seeks a kind of core adjusting device that can play a role in the occasion of slim Spindle Motor, to address the above problem.

The utility model content

The utility model is the core adjusting device problem of the aforementioned existing Spindle Motor of solution, and proposes a kind of core adjusting device of Spindle Motor of improvement.

A purpose of the present utility model is to guarantee that disc can be by accurately to core in the occasion of slim Spindle Motor.

The power of inserting when another purpose of the present utility model is that reducing disc loads.

The utility model provides a kind of Spindle Motor core adjusting device that is positioned on the Spindle Motor.This Spindle Motor core adjusting device includes a fixed part and a plurality of accent core shell fragment group.

Among one embodiment, fixed part is installed on the rotor surface of Spindle Motor, and its central authorities are provided with the core of a hole with ccontaining Spindle Motor.Transfer core shell fragment group be located on fixed part around, each transfers core shell fragment group to include two shell fragment portions at least, the length direction of shell fragment portion stretches along the circumferencial direction of rotor.Furthermore, core adjusting device utilizes the elasticity of shell fragment portion one discs to be aimed at the axle core of Spindle Motor, and utilize and to be positioned at the contact site that shell fragment portion front end is the R shape and to contact with discs, so that contact area is almost a contact, friction force when inserting, and then the convenience when increasing disc carrier to reduce disc.

Among another embodiment, fixed part and the assembling of accent core shell fragment are located at one and are installed in addition on the carrier of Spindle Motor.

In Spindle Motor core adjusting device of the present utility model, the shell fragment portion of accent core shell fragment group is paired configuration and number is a plurality of.In addition, the material of fixed part and accent core shell fragment group comprises one that is selected from the group that is made up of macromolecular material, metal material and compound substance.

The advantage of Spindle Motor core adjusting device provided by the utility model is: the first, can guarantee core adjusting device in the occasion of slim Spindle Motor, can finish exactly disc to core work; The second, utilize the R font design of the shell fragment portion front end of transferring core shell fragment group, the contact area between reduction shell fragment and disc, and then reduction friction force between the two reach the power of inserting of effective reduction disc, and improve the life-span of transferring the core shell fragment.

The accompanying drawing simple declaration

Figure 1A is the vertical view of an existing Spindle Motor core adjusting device.

Figure 1B is the sectional view of the Spindle Motor core adjusting device of Figure 1A.

Fig. 2 is the part sectioned view of core adjusting device.

Fig. 3 A is the vertical view of another existing Spindle Motor core adjusting device.

Fig. 3 B is the sectional view of the Spindle Motor core adjusting device of Fig. 3 A.

Fig. 4 A is the vertical view of the Spindle Motor core adjusting device of the utility model first embodiment.

Fig. 4 B is the sectional view of the Spindle Motor core adjusting device of Fig. 4 A.

Fig. 5 is the partial perspective view of core adjusting device.

Fig. 6 is the partial top view of core adjusting device.

Fig. 7 A is the vertical view of the Spindle Motor core adjusting device of another embodiment of the utility model.

Fig. 7 B is the sectional view of the Spindle Motor core adjusting device of Fig. 7 A.

Embodiment

As previously mentioned, with regard to a Spindle Motor core adjusting device,, can on motor, additionally not assemble independently carrier usually in order to reduce the height of Spindle Motor, but directly with the motor rotor surface as loading end.Therefore, the utility model first embodiment is that in this case Spindle Motor core adjusting device is an example, illustrate discs to core.

See also Fig. 4 A and Fig. 4 B, the Spindle Motor 10 that is provided among the utility model one embodiment includes a core 101, a bearing 102, a pad 103, a stator 104 and winds the line 105, one rotor 106 and permanent magnet 107, anti-slide plate 108 and core adjusting device 109.In the present embodiment, axle core 101 is accepted by bearing 102 and is fixed on the stator 104, and the central authorities of rotor 106 are provided with a hole with ccontaining axle core 101.Core adjusting device 109 and the independent part of rotor 106 for separating, yet, the integral body that both also can be one of the forming.On the other hand, core adjusting device 109 comprises a fixed part 109b and a plurality of accent core shell fragment group of being made up of two 109a of shell fragment portion and a fixed part 109c, wherein the 109a of shell fragment portion is positioned at two sides of fixed part 109c, and stretch towards circumferencial direction, and 109a of shell fragment portion and fixed part 109c are extended by fixed part 109b, the three is one of the forming, shown in the stereographic map of Fig. 5.Be noted that the 109a of shell fragment portion exists in pairs, that is the number of the 109a of shell fragment portion is necessary for even number.

See also Fig. 6, when loading optical disk sheet 13, the endoporus of discs 13 can contact the 109a of shell fragment portion up to endoporus toward interior compression earlier with fixed part 109c and 109b, and utilizes its elastic force to push against the endoporus of discs 13 after the 109a of the shell fragment portion resilience, and discs 13 just can centering adjustment thus.Therefore, the effect of fixed part 109c is to help the endoporus location of discs 13.In addition, for lowering the friction between shell fragment 109a of portion and discs, the contact site that the end of the 109a of shell fragment portion is the R shape contacts with discs, so that contact area is almost a contact, to reach the effect that reduces its friction force.

See also Fig. 7 A and Fig. 7 B, the Spindle Motor 20 that is provided among another embodiment of the utility model includes a core 201, a bearing 202, a pad 203, a stator 204 and wind the line 205, one rotor 206 and permanent magnet 207, anti-slide plate 208, carrier 209 and core adjusting device 210.In the present embodiment, axle core 201 is accepted by bearing 202 and is fixed on the stator 204, and the central authorities of rotor 206 are provided with a hole with ccontaining axle core 201.Core adjusting device 209 and the independent part of carrier 209 for separating, yet, the integral body that both also can be one of the forming.Carrier 209 and anti-slide plate 208 provide a loading end with the supporting CD sheet.On the other hand, core adjusting device 210 is by a plurality of the accent core shell fragment groups of being made up of two 210a of shell fragment portion, and the outer rim that the 210a of shell fragment portion is positioned at fixed part 210b becomes configuration in twos, and stretches towards circumferencial direction.Be noted that the 210a of shell fragment portion, fixed part 210b and carrier 209 are integrally formed, and the 210a of shell fragment portion exists in pairs, that is the number of the 210a of shell fragment portion is necessary for even number.

Similarly, when the loading optical disk sheet, the endoporus of discs can contact the 210a of shell fragment portion up to endoporus toward interior compression earlier with fixed part 210b, and utilizes its elastic force to push against the endoporus of discs after the 210a of the shell fragment portion resilience, and discs just can centering adjustment thus.Therefore, the effect of fixed part 210b is to help the endoporus location of discs.In addition, for lowering the friction between shell fragment 210a of portion and discs, the end of the 210a of shell fragment portion is that the contact site that is the R shape contacts with discs, so that contact area is almost a contact, to reach the effect that reduces its friction force.

In above-mentioned two embodiment, the Spindle Motor core adjusting device is provided with a plurality of accent core shell fragment groups, and shell fragment portion is in the outer rim of fixed part, and the opposite shell fragment portion of two direction of extension is one group.Yet it is one group that shell fragment portion also can not limit with two.

In addition, the material of the fixed part of two embodiment and shell fragment portion comprises one that is selected from the group that is made up of macromolecular material, metal material and compound substance.

In sum, the utility model is encyclopaedized by the foregoing description.Yet, those skilled in the art should be appreciated that, all embodiment of the present utility model only are exemplary at this but not are restricted, that is, in not breaking away from the utility model connotation and scope, the variation of above-mentioned each device of addressing example and correction example are the utility model and contain.Therefore, the utility model is defined by the scope of claim.

Claims (12)

1. Spindle Motor core adjusting device is characterized in that it comprises:

One fixed part, it is fixed on the rotor surface of a Spindle Motor, and its central authorities are provided with a hole and send out a core with ccontaining this Spindle Motor; And

A plurality of accent core shell fragment groups, be located on this fixed part around, each such transfer core shell fragment group to comprise two shell fragment portions at least, aim at this core in order to guide a disc, the length direction of such shell fragment portion stretches along the circumferencial direction of this rotor.

2. Spindle Motor core adjusting device as claimed in claim 1 is characterized in that the front end of such shell fragment portion is the R shape.

3. Spindle Motor core adjusting device as claimed in claim 1 is characterized in that the number summation of the shell fragment portion of all such accent core shell fragment groups is an even number.

4. Spindle Motor core adjusting device as claimed in claim 1, wherein said fixed part and such transfer the material of core shell fragment group to comprise to be selected from a kind of in the group that is made up of macromolecular material, metal material and compound substance.

5. Spindle Motor core adjusting device as claimed in claim 1, the rotor surface that it is characterized in that described Spindle Motor core adjusting device and described Spindle Motor is separable.

6. Spindle Motor core adjusting device as claimed in claim 1, the rotor surface that it is characterized in that this Spindle Motor core adjusting device and this Spindle Motor is integrally formed.

7. Spindle Motor core adjusting device is characterized in that it comprises:

One fixed part, it is installed on the carrier of a Spindle Motor, and its central authorities are provided with the core of a hole with ccontaining this Spindle Motor; And

A plurality of accent core shell fragment groups, be located on this fixed part around, each such transfer core shell fragment group to comprise two shell fragment portions at least, aim at this core in order to guide a disc, the length direction of such shell fragment portion stretches and extends towards circumferencial direction along the circumferencial direction of this rotor.

8. Spindle Motor core adjusting device as claimed in claim 7 is characterized in that the front end of such shell fragment portion is the R shape.

9. Spindle Motor core adjusting device as claimed in claim 7 is characterized in that the number summation of the shell fragment portion of all such accent core shell fragment groups is an even number.

10. Spindle Motor core adjusting device as claimed in claim 7, wherein said fixed part and such transfer the material of core shell fragment group to comprise to be selected from a kind of in the group that is made up of macromolecular material, metal material and compound substance.

11. Spindle Motor core adjusting device as claimed in claim 7, the surface that it is characterized in that described Spindle Motor core adjusting device and described carrier is separable.

12. Spindle Motor core adjusting device as claimed in claim 7 is characterized in that described fixed part, such accent core shell fragment group and the described carrier of described Spindle Motor core adjusting device is integrally formed.

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