CN1098537A

CN1098537A - Equipment for protection of disc

Info

Publication number: CN1098537A
Application number: CN 94107775
Authority: CN
Inventors: 木下信威
Original assignee: Nidec Sankyo Corp
Current assignee: Nidec Sankyo Corp
Priority date: 1993-08-13
Filing date: 1994-06-28
Publication date: 1995-02-08
Anticipated expiration: 2014-06-28
Also published as: JPH0719832U; CN1046045C

Abstract

Disk holding device of the present invention comprises being integrally formed and is provided with disk putting surface and disk radial setting circle side face and holds fixed disk with ball and this ball is had towards the turntable that holds recess of the spring of outer radial periphery one side shifting trend, turntable combines and above-mentioned ball and spring is remained on the above-mentioned lid that holds in the recess therewith, described lid has engagement pawl, has the core that comprises the setting circle side face on the described turntable, faying face in this core top setting and engagement pawl combination, have and can improve the disk bearing accuracy, advantage such as reduce cost.

Description

Equipment for protection of disc

The present invention relates to for example be applicable to the disk holding device of minidisk drive unit etc.

As being applicable to traditional general disk holding device such as minidisk drive unit, known have that Jap.P. for example is real opens that clear 61-28138 communique recorded and narrated, with turntable with disk is sandwiched the device of maintenance by the disk pressing component that magnet etc. is formed.This disk holding device mainly is applicable to the disk drive of the fixed of uses such as family.But, require the device of slimming like that for the portable disk drive unit, the disk pressing component becomes the obstruction of thin typeization, thereby there is a device as described below, central part at turntable is provided with a plurality of balls exactly, and these balls are applied acting force makes its radially outward outstanding along turntable, comes removable disk by the radially outwards outstanding power that overcomes ball, and the power radially outwards outstanding with ball can remain on disk on the turntable.The real clear 53-96806 communique (real public clear 58-22287 communique) of opening of Jap.P. has been narrated this device.Below, this conventional case is described.

At Figure 12 described later, in 13, Figure 12 is the vertical view of the band part section of expression traditional magnetic disk holding device example chief component, Figure 13 is in the main pseudosection of loading and unloading dress attitude for the disk of expression the foregoing description, on the central part of the turntable 81 that drives with the motor rotation, form the perisporium 82 of projection upward, keep body 83 and above-mentioned perisporium 82 tablings by the ball that makes the cap shape, keep body 83 to be fixed on the turntable 81 in ball, make ball keep the center-hole diameter of the external diameter of body 83 and disk 40 to equate or slightly little.Keep body 83 inside to have at ball and form the ditch shape ball guide groove 88 that radially extends, each ball guide groove 88 in, dispose along this ball guide groove 88 ball 84 movably at equally spaced 3 places along the circumferential direction.Each ball guide groove 88 has the peristome on the outer peripheral face that is formed on ball maintenance body 83, and makes each ball 84 have the trend that radially outwards moves with the volute springs 85 that are configured in each ball guide groove 88.In addition, narrow by near 86 stenosis of the two side the peristome that makes each ball guide groove 88, prevent that each ball 84 from dropping.Make the part of each ball 84 keep the peristome of body 83 outwards outstanding respectively from above-mentioned ball because of the effect of spring 85.Between the disk bearing plane of the extrusion position of this ball 84 and turntable 81, guarantee to have a certain proportion of suitable size that is equivalent to disk 40 thickness.

When carrying out disk 40 packed on turntable 81, shown in the right half of Figure 13, by the center pit of disk 40 is chimeric on the periphery of ball maintenance body 83, thereby put on each ball 84, press...with one's finger and press disk 40, make ball overcome the elastic force of spring 85 and when retreating, disk 40 is put on turntable 81.When putting disk 40 on turntable 81, the part of ball 84 keeps the peristome of body 83 outstanding because of the elastic force of spring 85 from ball, the upper edge that this outstanding power is pushed the center pit of disk 40 is pushed disk 40 on turntable 81, thereby its energy and turntable 81 are rotated together.

In the occasion that disk 40 is taken off from turntable 81, shown in the left half of Figure 13, make a finger and ball keep the top of body 83 to contact, another finger is contacted with the peripheral part of disk 40, thereby the peripheral part of disk 40 is lifted.Keep body 83 to take off from ball when the elastic force that can make ball 84 overcome spring the edge part of disk 40 by its center pit retreats like this.

By Figure 12, traditional magnetic disk holding device shown in 13 comprises the turntable 81 that the rotation direction position of disk 40 is stipulated, keep body 83 two parts with the ball that the radial position of disk 40 is stipulated, make the modes such as what is called engaging of its combination make turntable 81 and ball keep body 83 tablings by utilizing this two-part elastic force.Therefore, it is loosening to make turntable 81 and ball keep body 83 to produce easily, in addition, because of the ball of regulation disk 40 radial positions keeps body 83 except being combined with the accuracy requirement turntable 81 and electronic output shaft, also chimericly has an accuracy requirement to what turntable 81 and ball kept body 83, because of trueness error adds up, the bearing accuracy of the disk 40 of inaccessible requirement.Have again, because the align member of disk 40 is divided into each other two part, thus the bearing accuracy that inaccessible disk 40 requires, and, also there is the problem that manufacturing cost is improved.

Therefore, the present invention is just in order to solve the problem in the above-mentioned conventional art, purpose is to provide and can carries out the rotation direction of disk and the regulation of radial position with parts, thereby the bearing accuracy of disk is improved, and can reduce the disk holding device of manufacturing cost.

According to disk holding device of the present invention, comprise turntable, this turntable forms one to disk putting surface and disk radial setting circle side face, be integrally formed on this turntable simultaneously holding the ball that fixed disk uses and this ball being had towards the recess that holds of the spring of outer radial periphery one side shifting trend, turntable combines therewith, and above-mentioned ball and spring is remained on the above-mentioned lid that holds in the recess.

Simple declaration to accompanying drawing

Fig. 1 is the main pseudosection of expression disk holding device embodiment of the present invention,

Fig. 2 for the expression the foregoing description remove the lid state time upward view,

Vertical view when Fig. 3 cuts a part for expression with the foregoing description,

Fig. 4 is the upward view of the foregoing description turntable,

Fig. 5 is the sectional view of the above-mentioned turntable of expression along the Z-Z line of following Fig. 6,

Fig. 6 is half a vertical view of above-mentioned turntable,

Fig. 7 represents that for amplifying above-mentioned turntable holds the upward view of recess,

Fig. 8 is the above-mentioned drawing in side sectional elevation that holds recess,

Fig. 9 is the sectional view of the above-mentioned turntable setting circle perimeter surface part of expression,

Figure 10 is the vertical view of expression the foregoing description lid,

Figure 11 is the sectional view along the A-A line of Figure 10,

Figure 12 is the vertical view of the band part section of expression traditional magnetic disk holding device major part,

Figure 13 is in the main pseudosection of loading and unloading state for the disk of expression the foregoing description.

Below, with reference to accompanying drawing the disk holding device embodiment that the present invention relates to is described.

In Fig. 1-3,10 for putting, rotation drives the turntable of disk, turntable 10 is shown in Fig. 4-6 of this turntable component diagram, overall is discoid, the flange part that has cylindric core 20 and extend to outer circumferential side from the lower end of core 20, become the putting surface 15 of disk above this flange part, the outer peripheral face 30 of above-mentioned core 20 becomes the periphery of determining disk radial direction position, the top of this setting circle side face 30 is formed the center pit of the disk 40 circular conical surface 30a to 30 guiding of setting circle side face, central part at core 20 forms wheel hub 10a, the chimeric wheel hub 10a that is fixed on goes up in the axis hole 11 that forms not shown used for driving of magnetic disc motor rotation axis, forms with the motor rotation and orders about turntable 10 rotations.

Shown in Fig. 4-9, on turntable 10, along the circumferential direction equally spaced be formed with 3 fenestras 12 that run through the boundary part of core 20 and flange part along axis direction.The upper end of each fenestra 12 is linked to each other with the composition surface 14 that forms on the upper end of core 20.3 places 12 of above-mentioned each fenestras of the boundary part of the core 20 of turntable 10 and flange part form the fixing outstanding hole 27 with ball of disk respectively.Above-mentioned outstanding hole 27 is linked to each other with the recess 25 that holds that radially extends to form on the top of core 20.

Shown in Fig. 1,2,7,8, be used in the paired sidewall 24 that forms respectively on the core 20 of turntable 10 and surround the above-mentioned recess 25 that respectively holds.It is fixing with ball 38 to lay disk in respectively holding recess 25, and makes radially mobile during holding recess 25 that ball 38 can be along core 20.Formation makes near 26 distances in two side the above-mentioned outstanding hole 27 that respectively holds recess 25 also narrower than the diameter of ball 38, thereby can prevent that ball 38 from coming off, and the part of ball 38 can be given prominence to from outstanding hole 27.Lay volute spring 36 in respectively holding recess 25, spring 36 makes each ball be subjected to radially outwards outstanding acting force, makes the part of each ball 38 project to the outside of the setting circle side face 30 of core 20 from outstanding hole 27.

The jetty 18 that has concentric circles in the bottom of turntable 10 is flush-mounted in lid 50 inboard of this jetty 10.As Figure 10, shown in 11 the component diagram, the hub portion 57 that has concentric circles at the central part of lid 50, has the base plate 51 that extend to peripheral direction the bottom of hub portion 57 from then in addition, make the below of this base plate 51 from turntable 10, just embed interior all sides of the jetty 18 of above-mentioned turntable 10, above-mentioned hub portion 57 is cooperated with the outer circumferential side of the hub portion 10a of turntable 10 from the reverse side of disk putting surface 15.Lid 50 have with the integrally formed elastic arm of holding up 52 in position of above-mentioned fenestra 12 correspondences of turntable 10.Form engagement pawl 53 in the top ends of each elastic arm 52 towards interior all sides.

Make each elastic arm 52 of lid 50 pass each fenestra 12 of turntable 10, make the engagement pawl 53 of each elastic arm 52 top ends utilize the elasticity of elastic arm 52 and above-mentioned each faying face 14 combination of turntable 10.Like this, turntable 10 and lid 50 are combined.Lid 50 also has from hub portion 57 and is radial 3 raised lines 55 that stretch out.Make each raised line 55 and turntable 10 above-mentioned to hold recess 25 corresponding, each raised line is covered the bottom open surface that respectively holds recess 25 at turntable 10 and lid 50 state that combines, constitute above-mentioned each ball 38 and spring 36 remained on and hold in the recess 25.In addition, as form the elastic arm identical in turntable 10 sides, this elastic arm and lid 50 are combined with above-mentioned elastic arm 52.

Fig. 1, Fig. 2 represent the state that assembles like that by above-mentioned.The ball 38 that fixed disk is used is subjected to radially outward outstanding acting force along core 20 because of the power of spring 36, because this outside power makes ball 38 contact with near 27 two sides 26, outstanding hole that hold recess 25, ball is moved be restricted, the part of ball 38 is given prominence to from above-mentioned outstanding hole 27.

When disk 40 is packed on turntable 10, the center pit of disk 40 is cooperated with the outer peripheral face of core 20 through dip plane 30a, the edge part of the center pit of disk 40 is put on each ball 38.When from then on state further is pressed into disk 40, the center pit edge part of disk 40 is pushed the outer peripheral face of each ball 38, make each ball 38 overcome the power that spring 36 gives and in core 20, retreat, meanwhile, disk 40 descends along the outer peripheral face of core 20.When the upper edge of the center pit of disk 40 drops to the center of each ball 38 when following, each ball 38 is outwards outstanding from the outer peripheral face of core 20 because of acting force of the spring, outstanding thus power is pushed the upper edge of the center pit of disk 40 downwards, with disk 40 by on the disk putting surface 15 that is pressed in turntable 10.

Aforesaid disk 40 is put state on turntable 10, because of disk 40 center pit edge parts are determined the radial position of disk by setting circle side face 30 restriction of core 20, the position of the rotation center axis direction of disk 40 is determined with the disk putting surface 15 of turntable 10.At this state, if drive not shown motor, then disk 40 and turntable 10 are integral rotation, thereby can carry out the record and the reproduction of information signal.

When with disk 40 when turntable 10 takes off, make a finger, for example forefinger contacts with the top of core 20, makes another finger, the neighboring of for example big finger and disk 40 contact, therefore carries on the outer peripheral edges of finger with disk 40, makes disk 40 relative cores 20 inclinations.Perhaps make to point more than two and contact with the neighboring of disk 40, the same when making disk 40 upwards not pick up obliquely with the installation of carrying out disk 40, ball 38 is subjected to the pushing of center pit edge of disk 40, overcomes spring force and retreats, thereby disk 40 can be taken off.

According to the foregoing description, because rotation direction of carrying out disk 40 with the setting circle side face 30 and the disk putting surface 15 of turntable 10 and disk radial position is definite, for lid 50, owing to only need fixed disk is remained on holding in the recess 25 of turntable 10 with ball 38 and spring 36, as long as so can keep the machining precision of turntable 10, just can carry out disk 40 rotation directions and position radially accurately determines, therefore, the bearing accuracy of disk 40 can be improved, and the purpose that reduces cost can be reached.In addition, because above-mentioned setting circle side face 30 and disk putting surface 15 formed one, rather than combine by a plurality of members and to form, thereby, do not produce gap or loosening at the location circumference at

side face

30 and 15 of disk putting surfaces, the bearing accuracy of disk 40 is improved.

According to the present invention, owing to be provided with disk putting surface and disk radial setting circle side face are formed one, and the recess that holds that will hold ball that fixed disk uses and the spring that radially outwards pushes this ball forms the turntable of one and combines with this turntable, above-mentioned ball and spring remained on hold the recess lid, therefore, as long as can keep the machining precision of turntable, just can carry out the rotation direction and the position radially of disk accurately and determine, thereby can reach bearing accuracy that improves disk and the purpose that reduces cost.In addition, because setting circle side face and disk putting surface are formed one, rather than a plurality of members are combined, therefore also make between setting circle side face and disk putting surface, not produce gap or loosening, the bearing accuracy of disk is improved.

Claims

1, disk holding device, it is characterized in that, this device comprises disk putting surface and disk radial setting circle side face formation one, make simultaneously hold the ball that fixed disk uses and make this ball have towards the spring of outer radial periphery one side shifting trend hold recess be integrally formed into thereon turntable and therewith turntable combine above-mentioned ball and spring remained on the above-mentioned lid that holds in the recess.

2, disk holding device according to claim 1, it is characterized in that it is chimeric from opposition side and this turntable of the described disk putting surface of described turntable that described lid has engagement pawl, described turntable has the core that is formed with described setting circle side face on it, faying face is formed at the top at this core, by the combination of this faying face and described engagement pawl, described turntable and lid are combined.