JP4305414B2 - Head support device and disk device including the same - Google Patents

Description

  The present invention relates to a disk device having a floating head, for example, a head support device used in a magnetic disk device, an optical disk device, a magneto-optical disk device, and the like, and a disk device using the same.

  In recent years, as disk devices have become smaller and thinner, opportunities for use in portable devices have increased, and there has been an increase in the chances of receiving excessive shocks due to extreme vibration, dropping or collision. When such a strong external impact is applied, the levitation force at the slider portion due to the air flow generated by the rotation of the recording medium and the urging force by the head support device for urging the slider toward the recording medium side Balance may be lost. As a result, there is a possibility that the slider jumps from the recording medium and collides with the recording medium, causing magnetic damage or mechanical damage to the recording medium or the magnetic head.

  Under such circumstances, a head support device that meets the demands of increasing the load load on the slider, increasing the flexibility, and further increasing the rigidity of the structure, and also has a strong impact resistance has been proposed. ing.

  A head support device in a magnetic disk device having a conventional flying head will be described below with reference to the drawings.

  FIG. 19 is a side view showing a configuration of a conventional head support device, and FIG. 20 is an exploded perspective view of the head support device.

  19 and 20, a support arm 192 having a slider 191 provided with a magnetic head (not shown) on the lower surface mounted on the lower surface of one end is fixed to one end of the leaf spring portion 193 at the other end. Has been. The other end of the leaf spring portion 193 abuts on the pivot bearing 195 via the spring fixing member 194 and is fixed thereto. Further, the leaf spring portion 193 and the spring fixing member 194 include a semi-annular projecting portion 199a provided on the hollow collar 199 by the flange portion 197a and the nut 198 of the bearing portion 197 which is the rotation center of the support arm 192. Is sandwiched through. The bearing portion 197 is further provided with a screw portion 197b and a cylindrical portion 197c. The semi-annular protrusion 199a has the same shape as a portion that abuts against the spring fixing member 194 provided on the hollow collar 199. As a result, the support arm 192 is elastically held by the pivot bearing 195 via the leaf spring portion 193. The hollow collar 199 has a bottom surface 199b and a top surface 199c of the protruding portion 199a.

  The top portions 195a and 195b provided on the pivot bearing 195 are in contact with the support arm 192 at contact points Pa and Pb (Pb is not shown). As a result, one end portion of the support arm 192 is biased toward the recording medium 196 by the elastic force of the leaf spring portion 193, and compressive stress is generated at the contact points Pa and Pb. The top portions 195a and 195b of the pivot bearing 195 are perpendicular to the rotation center axis direction of the support arm 192 and the longitudinal direction of the support arm 192, and come into contact with the support arm 192 on a line passing through the rotation center axis. Is provided.

Further, for example, when the rotation is performed by a voice coil motor, the position of the center of gravity of the support arm 192 with the voice coil 200 and the coil holder 201 attached is set as follows. The position of the center of gravity is defined by an intersection of a rotational axis (not shown) in the radial direction of the support arm 192 and a rotational axis perpendicular to the recording surface of the recording medium 196, that is, the support arm 192 and the contact points Pa and Pb. It is designed to be substantially the same position as the midpoint on the connecting line. As described above, a stable head support device configuration that has strong impact resistance against external impact has been proposed (see, for example, Patent Document 1 and Patent Document 2).
Japanese Patent No. 3374848 (Page 4, Page 5, Figure 1) Japanese Unexamined Patent Publication No. 2004-62936 (page 8, FIG. 4)

  However, in the above conventional head support device, (1) variation in parallelism of the upper surface of the protrusion with respect to the bottom surface of the collar, (2) variation in perpendicularity between the bottom surface and the upper surface with respect to the central axis of the collar, and (3) bottom surface and top surface of the collar. When the nut is tightened due to variations in the flatness, etc., the protruding portion of the collar may not contact the leaf spring portion evenly. In other words, it comes into contact with each other, or in an extreme case, only a part of the protruding portion of the collar comes into contact, and the spring repulsive force of the leaf spring portion changes. As a result, there is a problem that the load load on the recording medium varies.

  In addition, there is a minute gap between the hollow portion of the collar and the cylindrical portion of the bearing portion that fits into the hollow portion. Therefore, when the nut is screwed into the thread portion of the bearing portion and the leaf spring portion is sandwiched, the contact position of the collar protrusion with respect to the leaf spring portion varies due to the minute gap. As a result, since the effective length of the spring portion of the leaf spring portion changes, there is a problem that the spring repulsion force changes and the load load on the recording medium varies.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems. An excellent head support device that suppresses manufacturing variations in a portion related to a load load and improves the stability and reliability of the load load and a disk device including the head support device The purpose is to provide.

  In order to achieve this object, the head support device of the present invention is capable of rotating in the radial direction of the recording medium around the horizontal rotation axis and in a direction perpendicular to the recording medium around the vertical rotation axis. A device that can rotate, a head slider on which a head is mounted, and a voice coil motor that is disposed on one end via a gimbal mechanism and that rotates on the other side in the radial direction of the recording medium. A head support arm on which a coil holder to which a voice coil is configured is disposed is disposed, a bearing portion that is the center of a horizontal rotation shaft in which the head support arm rotates in the radial direction of the recording medium, and a vertex of the head support arm A pair of pivot portions serving as the rotation center of a vertical rotation shaft for rotating the arm in a direction perpendicular to the surface of the recording medium, and an elastic means for applying a biasing force in the direction perpendicular to the surface of the recording medium to the head support arm And elastic It includes a collar that presses the step and a nut that is screwed into the threaded portion of the bearing portion, and the elastic means is sandwiched between the flange portion and the nut of the bearing portion via the collar, thereby connecting the apexes of the pair of pivot portions. The head support arm is rotatable in the direction perpendicular to the recording medium around the line, and the collar has at least one pressing portion on one end face and at least one protrusion on the other end face. Become.

  In the above configuration, the collar is formed of a cylinder having a plurality of pressing portions on one end surface and a plurality of protrusions on the other end surface, and is perpendicular to the longitudinal center line of the head support arm. The edge of the protrusion on the side close to the diameter line is between the edge of the pressing part closest to the diameter line and the edge of the pressing part farthest from the diameter line. And it may be arranged so as to be positioned between the respective edge portions of the pressing portion farthest from the center line in the regions on both sides of the center line.

  Moreover, in the said structure, the edge part near the diameter line of a projection part may be arrange | positioned on the straight line parallel to a diameter line. Alternatively, the edge portion on the side close to the diameter line of the protrusion may be formed so as to be perpendicular to the center line in the longitudinal direction of the head support arm. The collar may have a protrusion at one end thereof, and a pressing portion may be provided at the end of the protrusion.

  With the above configuration, the nut tightening force can be reliably transmitted as a pressing force in the axial direction of the rotating shaft from the protrusion formed on the bottom surface of the collar. That is, regardless of the parallelism of the upper surface with respect to the bottom surface of the collar, etc., the pressing portion provided on the collar is pressed against the bearing portion in contact with the clamp portion of the spring portion, which is an elastic means, in the direction perpendicular to the flange step surface. Pressure can be applied.

  Furthermore, since the clamp part of the spring part can be reliably pressed against the flange part of the bearing part, the processing accuracy of the collar may be low, and the cost can be reduced. Furthermore, it is possible to suppress a change in load load caused by the elastic force generation part of the spring part. As a result, a stable load load can be obtained, and a head support device having high impact resistance, low cost and high reliability can be realized.

  In the above configuration, the collar may be formed such that the edge portion on the side close to the diameter line of the pressing portion is perpendicular to the center line in the longitudinal direction of the head support arm. Or the edge part by the side of the diameter part of a press part may be arrange | positioned on one straight line parallel to a diameter line. Alternatively, in the direction perpendicular to the longitudinal direction of the head support arm, the width of the elastic means that contacts the pressing portion may be smaller than the width of the edge portion of the pressing portion.

  With this configuration, it is possible to suppress variations in the length of the elastic force generating portion in the spring portion in which the edge portion of the pressing portion is an elastic means. Furthermore, even if the position of the clamp part of the collar and the spring part is slightly shifted in the direction perpendicular to the longitudinal direction of the head support arm, the length of the elastic part in the spring part is not affected. Therefore, a stable urging force can be applied, a stable load load can be obtained, and a highly reliable head support device can be realized.

  In the above configuration, the reinforcing plate may be fixed to the surface of the elastic means opposite to the flange portion side of the bearing portion, and the pressing portion may press the reinforcing plate.

  In the above configuration, the width of the end portion of the reinforcing plate in the direction perpendicular to the longitudinal direction of the head support arm may be larger than the width of the elastic means at the portion where the reinforcing plate abuts. Or you may make it the width | variety of the reinforcement plate in the part which a press part contact | abuts smaller than the width | variety of the edge part of a press part in the direction perpendicular | vertical to the longitudinal direction of a head support arm.

  In this way, by accurately fixing the reinforcing plate to the clamp portion of the spring portion which is an elastic means, the length of the portion having elasticity with respect to the spring portion can be clearly defined, and a highly reliable load A load can be obtained. Even if the positional relationship between the clamp portion of the spring portion and the reinforcing plate or the positional relationship between the reinforcing plate and the collar is slightly shifted in the direction perpendicular to the longitudinal direction of the head support arm, the length of the elastic portion of the spring portion is reduced. No effect. Therefore, a stable urging force can be applied, a stable load load can be obtained, and a highly reliable head support device can be realized.

  In the above configuration, in the longitudinal direction of the head support arm, the edge portion of the pressing portion near the collar diameter line in the direction perpendicular to the longitudinal center line of the head support arm is the diameter line of the horizontal rotation shaft. You may arrange | position in the position close | similar to the diameter line of a horizontal rotation axis | shaft from the edge part of the reinforcement plate of the near side. Or it is good also as a structure which fixes a reinforcement plate to the surface on the opposite side to the flange part side of a bearing part in an elastic means, and a press part presses a reinforcement plate.

  With such a configuration, the clamp portion of the elastic means is reliably pressed and a stable urging force can be applied. As a result, a stable load load can be obtained, and a highly reliable head support device can be realized. In particular, in the case where the pressing portion is configured to press the reinforcing plate, even if the collar is misaligned due to the fitting gap between the collar and the cylindrical portion of the bearing portion, the end portions on both sides of the reinforcing plate are surely secured by the collar. Can be pressed. Therefore, it does not affect the formation of the length of the elastic portion of the spring portion of the head support arm. As a result, a stable urging force can be applied, a stable load load can be obtained, and a highly reliable head support device can be realized.

  Further, in the above configuration, when the nut is tightened by being screwed into the screw portion of the bearing portion, the end surface of the nut inclined according to the gap between the screw portion and the nut comes into contact with only the protrusion provided on the collar. In this way, the protrusion height of the protrusion may be set.

  With such a configuration, the tightening force of the nut effectively and reliably becomes the pressing force of the collar in the axial direction of the rotating shaft that presses the clamp portion of the elastic means. Therefore, it is possible to reliably generate a pressing force on the portion to be clamped of the clamp portion, to apply a stable urging force, to obtain a stable load load, and to realize a highly reliable head support device. be able to.

  In the above configuration, the pair of pivot portions may be formed on the head support arm. With this configuration, since the pair of pivot portions are formed integrally with the head support arm, the pivot portion can be manufactured at low cost, and the manufacturing variation of the position of the pivot portion with respect to the elastic force generating portion of the spring portion, which is an elastic means, is extremely reduced. be able to. As a result, it is possible to realize a head support device that can suppress and stabilize the variation in the load load and can be stabilized, and that is inexpensive.

  In the above configuration, the pair of pivot portions may be formed on the flange portion of the bearing portion. Alternatively, the pair of pivot portions may be formed on the pivot bearing, and the pivot bearing may be disposed on the nut side of the bearing portion, and may be sandwiched between the flange portion and the nut together with the elastic means and the reinforcing plate via the collar.

  With such a configuration, the vertical rotation shaft with respect to the head support arm is formed on one surface of the head support arm where the apexes of the pair of pivot portions abut, and a stable load load can be obtained and the reliability is improved. High head support device can be realized.

  The disk device of the present invention includes a recording medium rotated by a spindle motor, and a head support device having a signal conversion element facing the recording medium and recording a signal on the recording medium or reproducing a signal from the recording medium. The head support device is the above-described head support device.

  With this configuration, it is possible to have a stable load load, high impact resistance, and improve head positioning control characteristics. As a result, the magnetic head can be moved to the target track position at a high speed, so that a disk device with greatly shortened access time can be realized.

  The head support device according to the present invention has elastic means for applying an urging force in a direction perpendicular to the surface of the recording medium to the head support arm, and a collar that presses the elastic means, and one end face of the collar. And at least one pressing portion and at least one protrusion on the other end face.

  With such a configuration, a stress that pushes down the head support arm toward the surface of the recording medium acts, and a load load can be generated by the elastic means. Also, when the head support device receives an impact force from the outside in the axial direction of the horizontal rotation shaft, the force for rotating the head support device does not work, and the head slider collides with the surface of the recording medium and causes damage. There is no such a thing, and reliability can be improved.

  Further, the force in the axial direction of the horizontal rotation shaft due to the tightening of the nut presses the protruding portion, and the pressing force is transmitted to the pressing portion provided on the other end surface through the collar body. At this time, the pressing force applied to the spring portion by tightening the nut is a force in a direction perpendicular to the flange portion step surface of the bearing portion, regardless of the parallelism or the like with respect to both end surfaces of the collar. As a result, pressing by the elastic means against the stepped surface of the flange portion of the bearing portion is reliably performed, and a stable load load can be obtained.

  In addition to the above-described configuration, a reinforcing plate made of a material having high rigidity is fixed to a predetermined position with high precision on a surface on the head slider side of the clamp portion of the spring portion of the head support arm.

  By adopting such a configuration, the variation in the length of the elastic force generating portion for generating the load load can be suppressed to be very small. In addition, variations in other influential factors that generate load loads such as the height of the pivot portion and the positional relationship between the elastic force generating portion and the pivot portion can be suppressed to a very small level. Furthermore, the variation in the elastic force generated in the elastic force generating portion of the head support arm can be suppressed to a very small level. Therefore, the variation in the load load can be suppressed to a small level, the manufacturing variation can be reduced, and the manufacturing quality can be improved. it can. As a result, it is possible to realize an excellent head support device that has a stable load load, high impact resistance, and high reliability.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Further, a magnetic disk device will be described as an example of the disk device. In the following drawings, the same elements are denoted by the same reference numerals, and description thereof may be omitted.

(First embodiment)
1 to 11 are views for explaining a head support device and a disk device including the head support device according to a first embodiment of the present invention.

  FIG. 1 is a plan view showing the main part of the magnetic disk drive.

  FIG. 2 is a plan view showing a head support arm of a head support device used in the magnetic disk device.

  3 is a plan view showing the configuration of the head support device, FIG. 4 is a side view thereof, and FIG. 5 is an exploded perspective view thereof.

  6A and 6B are diagrams showing the configuration of the collar in the head support device. FIG. 6A is a top view, FIG. 6B is a side view, and FIG. 6C is a bottom view.

  7A and 7B are diagrams showing a contact state between the nut and the collar when the nut is tightened in the head support device. FIG. 7A is a partial side view, and FIG. It is a partial right view which shows the contact state of a color | collar.

  FIG. 8 is a side view showing the configuration of another example of the head support device.

  FIG. 9 is a partial side view showing the configuration of another example of the head support device.

  FIG. 10 is a partial side view showing the configuration of another example of the head support device.

  FIG. 11 is a partial plan view showing another example of the shape of the spring portion in the head support arm in the head support device.

  In FIG. 1, the upper lid is removed and the upper yoke is partially omitted. FIG. 7B shows only the nut and collar, and the clamp portion of the collar and the spring portion in contact with the collar, and the other portions are omitted.

  As shown in FIG. 1, a recording medium 4 is placed on a rotor hub portion 3 fixed to a rotary shaft 2 of a spindle motor (not shown) that rotates around a rotation center 1. On the other hand, a head support device 7 which is a signal conversion element swing arm is pivotally supported around a rotation shaft 5 via a bearing 6. In the head support device 7, a tab portion 8 b is formed at one end of the arm portion 8 a of the head support arm 8, and a head slider 9 is disposed on the rotating shaft 5 side from the tab portion 8 b. A voice coil 10 is disposed at the other end of the arm portion 8a, and the head support device 7 is arranged around the rotation shaft 5 in the radial direction of the recording medium 4 and the surface of the recording medium 4. Rotate in parallel. The head slider 9 is equipped with a magnetic head (not shown) as a signal conversion element via a gimbal mechanism.

  In addition, an upper yoke 12 having a magnet 11 fixed thereto is disposed above the voice coil 10 (that is, on the side opposite to the recording medium 4 with respect to the head support device 7) so as to face the voice coil 10. It is attached to a housing (not shown). Further, a lower yoke 13 is attached to a chassis or other casing (not shown) below the voice coil 10 so as to sandwich the voice coil 10. Thus, the voice coil motor (hereinafter referred to as VCM) is configured by the voice coil 10, the magnet 11 fixed to the upper yoke 12 facing the voice coil 10, and the lower yoke 13.

  A ramp block 15 having a ramp portion 14 provided with a guide portion is attached to a chassis or other casing (not shown) so as to contact the tab portion 8b and guide the head support device 7 up and down. ing.

  In such a configuration, when a current is supplied to the voice coil 10 facing the magnet 11, the VCM is activated and the head support device 7 is rotated in the radial direction of the recording medium 4. During operation of the magnetic disk device, the head support device 7 rotates around the rotation shaft 5 that is a horizontal rotation shaft and moves on the data recording area of the rotating recording medium 4. Further, when the magnetic disk device is not operating, the head support device 7 is rotated clockwise, and the head support device 7 is rotated to a predetermined position of the ramp portion 14 which is a retracted position.

  In order to prevent the head support device 7 from excessively swinging clockwise or counterclockwise, crash stops 16 and 17 are provided on the chassis or the housing or other structural members.

  In FIG. 1, a center line 8j in the length direction of the head support arm 8 and a line 18 connecting the two pivot portions 8g are also shown.

  Next, the configuration of the head support device 7 will be described with reference to FIGS.

  As shown in FIG. 2, the head support arm 8 is formed with a tab portion 8b at one end of the arm portion 8a and a spring portion 8c as an elastic means at the other end. In addition, a hole 8f and a pair (two pieces) of pivot portions 8g are formed at a position sandwiching the spring 8c and the hole 8f in the inner portion of the spring 8c. The spring portion 8c includes a clamp portion 8d that abuts on a stepped surface of a bearing portion, which will be described later, and an elastic force generation portion 8e that is an elastic means for generating a load load. The spring portion 8c has one end portion of the elastic force generating portion 8e connected to the arm portion 8a at the base portion 8h, and the other end portion constituting a clamp portion 8d. There is no connection between the clamp portion 8d and the arm portion 8a. The two pivot portions 8g have substantially the same distance on both sides from the virtual point 8i on a line 8k that passes through the virtual point 8i of the hole 8f and is substantially perpendicular to the center line 8j of the head support arm 8. Is provided. As will be described later, the virtual point 8i substantially coincides with the rotation center of the rotation shaft 5 around which the head support device 7 rotates. Furthermore, bent portions 8l for enhancing the rigidity of the arm portion 8a are bent on both side surfaces in the longitudinal direction of the arm portion 8a in the same direction as the protruding direction of the two pivot portions 8g formed on the arm portion 8a. Is formed. The bent portion 8l is formed on both side surfaces of the head support arm 8 from the side end portion of the tab portion 8b.

  In the above description, it goes without saying that the bent portion 8l may be bent in the direction opposite to the protruding direction of the pivot portion 8g. 2 also shows dimples 8m and notches 8n provided in the arm portion 8a.

  Next, details of the head support device 7 will be described.

  As shown in FIGS. 3, 4 and 5, the head support arm 8 is provided with a head slider 9 on which a magnetic head (not shown) is mounted via a gimbal mechanism 31 (see FIGS. 4 and 5). Has been. A dimple 8m is provided on the lower surface of the head support arm 8 so as to contact the vicinity of the center portion of the head slider 9. When the head slider 9 is attached to the head support arm 8 via the gimbal mechanism 31, the dimple 8m is arranged at the approximate center of the upper surface of the gimbal mechanism 31 or the head slider 9 (the surface opposite to the surface on which the magnetic head is mounted). By abutting against this portion, unnecessary vibrations in the roll direction or pitch direction of the head slider 9 with respect to the recording medium 4 during operation of the magnetic disk device can be flexibly followed.

  Further, a coil holder 32 having a hole 32 a (see FIG. 5) to which the voice coil 10 is attached is fixed to the head support arm 8. The coil holder 32 has an end opposite to the side on which the voice coil 10 is fixed, overlapping with a part of the arm portion 8a sandwiched between the bent portions 8l in the axial direction of the rotating shaft 5. It is configured. Further, at least one of a plurality of fixing points for fixing the head support arm 8 and the coil holder 32 is provided on the arm portion 8a sandwiched between the bent portions 8l.

  As described above, the rigid coil holder 32 is fixed, the bent portion 81 is formed, and the coil holder 32 is fixed in the arm portion 8a sandwiched between the bent portions 8l on both sides. The head support arm 8 has a high rigidity as a whole.

  As shown in FIG. 4, the bearing portion 33 includes a clamp portion 8 d of the spring portion 8 c, a flange portion 33 a having a stepped surface that comes into contact with the two pivot portions 8 g, and a screw portion 33 b that is screwed into the nut 34. And a cylindrical portion 33c having an outer diameter that fits into the collar 35, and is formed in a cylindrical shape with a hollow collar.

  The collar 35 has an inner diameter that fits into the cylindrical portion 33c of the bearing portion 33, passes through the hole portion 32a (see FIG. 5) of the coil holder 32, and is a notch hole in the arm portion 8a. It has an outer diameter smaller than the shape dimension of the outer portion of 8n (see FIG. 2). Moreover, the shape is formed in a hollow cylindrical shape provided with a semi-annular projecting portion 35a having substantially the same shape as the clamp portion 8d of the spring portion 8c provided on the head support arm 8 to be contacted. Yes.

  Next, the protruding portion 35a of the collar 35 will be described with reference to FIG.

  As shown in FIG. 6, three pressing portions 61, 62, 63 are provided on the upper surface of the protrusion 35 a of the collar 35 (the surface of the head support arm 8 on the side in contact with the clamp portion 8 d of the spring portion 8 c). Each is formed at a position where it abuts on the clamp portion 8d of the spring portion 8c.

  In addition, it is desirable that the edge portions 62 b and 63 b at the end portions 62 a and 63 a of the pressing portions 62 and 63 are formed so as to be on a single straight line 67. Further, a portion from the portion where the edge portions 62b and 63b abut against the spring portion 8c to the base portion 8h of the spring portion 8c with respect to the arm portion 8a (the elastic force generating portion 8e of the spring portion 8c) is applied to the head support device 7 by load It is comprised so that it may become a part which exhibits the spring performance for generating.

  The width in the direction perpendicular to the longitudinal direction of the head support arm 8 at each of the end portions 62a and 63a of the pressing portions 62 and 63 is the width of the clamp portion 8d of the head support arm 8 that contacts the edge portions 62b and 63b. It is desirable to have a width greater than the width. With this configuration, even when the collar 35 is brought into contact with the clamp portion 8d of the head support arm 8, even if the pressing portions 62 and 63 are displaced in the direction perpendicular to the longitudinal direction of the head support arm 8 with respect to the clamp portion 8d. These edge portions 62b and 63b abut over the entire width of the clamp portion 8d.

  The edge portions 62b and 63b are preferably formed so as to be substantially perpendicular to the diameter line 66. The diameter line 66 is on an extension line of the center line 8j shown in FIG.

  Further, as shown in FIG. 6C, two protrusions 64 and 65 are formed on the bottom surface of the collar 35 (the surface on the side in contact with the nut 34). The edge portions 64 a and 65 a on the side close to the diameter line 69 of the collar 35 in the projections 64 and 65 are formed on a single straight line 68. Each of the edge portions 64a and 65a is preferably formed so as to be substantially perpendicular to the diameter line 66 (that is, the center line 8j in the longitudinal direction of the head support arm 8).

  In the longitudinal direction of the head support arm 8, the edge portions 64a and 65a are located on the pressing portion 61 farthest from the two points 62c and 63c on the pressing portions 62 and 63 that are closest to the diameter line 69. It is desirable that it is formed so as to be between another point 61c. In addition, the edge portions 64 a and 65 a are desirably formed so as to be positioned between the point 62 c on the pressing portion 62 and the point 63 c on the pressing portion 63. The semi-annular protrusion 35 a provided with the pressing portions 61, 62, 63 is not necessarily provided, and the pressing portions 61, 62, 63 may be provided directly on the upper end surface of the hollow cylindrical collar 35. Good. Moreover, although it has described that the three press parts 61, 62, and 63 are each formed in the upper surface of the protrusion part 35a, it is not restricted to this at all, What is necessary is just one or more. The two protrusions 64 and 65 formed on the bottom surface of the collar 35 may have a shape in which two protrusions are connected.

The step surface of the flange portion 33a of the bearing portion 33 is brought into contact with the respective apexes of the pivot portion 8g provided on the head support arm 8 at the contact points P ₁ and P ₂ , respectively. That is, the bearing portion 33 is passed through the hole 8 f of the head support arm 8, the collar 35 is fitted and inserted into the cylindrical portion 33 c of the bearing portion 33, and the nut 34 is screwed into the screw portion 33 b of the bearing portion 33. Let

  Next, by tightening the nut 34, the head support arm 8 is sandwiched between the flange portion 33 a of the bearing portion 33 and the nut 34 via the collar 35. As a result, the head support arm 8 is elastically held by the bearing portion 33 via the spring portion 8c. Thus, the head support device 7 is constituted by the bearing 33, the head slider 9 via the gimbal mechanism, the head support arm 8 to which the voice coil 10 is attached via the coil holder 32, the collar 35 and the nut 34.

  Since the projections 64 and 65 are formed on the bottom surface of the collar 35, when the nut 34 is screwed into the threaded portion 33 b of the bearing portion 33 and tightened, the nut 34 is first attached to the projections 64 and 65 of the collar 35. Abut. Further, when the nut 34 is tightened, the collar 35 is further pressed, and the spring portion 8 c of the head support arm 8 is pressed against the flange portion 33 a of the bearing portion 33. As a result, a reaction force against the pressing acts on the nut 34 via the projections 64 and 65 of the collar 35. Therefore, as shown in FIG. 7A, the nut 34 is pressed by the reaction force from the protrusions 64 and 65 of the collar 35, and due to a minute gap between the nut 34 and the screw portion 33 b of the bearing portion 33, The axis of the nut 34 is inclined with respect to the axis of the bearing portion 33.

  Therefore, the nut 34 is also inclined with respect to the axis of the collar 35, and the collar 35 is pressed against the projections 64 and 65 of the collar 35 in a state where the axis of the nut 34 is inclined. Presses the edge portions 64a and 65a of the projection portions 64 and 65 of the collar 35, respectively.

Next, the pressing forces F ₁ and F _{2 in} the axial direction of the rotation shaft 5 of the nut 34 that presses the collar 35 will be described with reference to FIGS. 7 (a) and 7 (b). The pressing forces F ₁ and F ₂ are in the positional relationship shown in FIG. 6, and the point 61 c of the pressing part 61 located farthest from the diameter line 69 of the collar 35 and the pressing part 62 located closest to the diameter line 69, 63 acts between the respective edge portions 62b and 63b of 63 and between the points 62c and 63c. Accordingly, as shown in FIG. 7 (b), the tightening force of the nut 34, the pressing force _{F 3} at the pressing portion 61, as the pressing force _{F 5} in the pressing force _{F 4} and the pressing portion 63 of the pressing portion 62, effectively color 35.

  Further, the pressing force of the collar 35 acts reliably regardless of the accuracy such as the parallelism of the upper surface with respect to the bottom surface of the collar 35. Further, the pressing force of the collar 35 becomes a force that presses the clamp portion 8d in a direction perpendicular to the step surface of the flange portion 33a of the bearing portion 33 with which the clamp portion 8d of the spring portion 8c of the head support arm 8 abuts.

Further, the spring portion 8 c of the head support arm 8 is reliably pressed against the flange portion 33 a of the bearing portion 33 by the pressing forces F ₃ , F ₄ , and F ₅ from the collar 35. Therefore, it is not necessary to strictly manage the accuracy such as the parallelism of the upper surface with respect to the bottom surface of the collar 35, and variations in the elastic force due to the spring portion 8c can be suppressed. As a result, a stable load load with little variation can be generated.

  When the spring portion 8c is sandwiched between the flange portion 33a of the bearing portion 33 and the nut 34 via the collar 35, the nut 34 inclined with respect to the shaft center of the bearing portion 33 is other than the projection portions 64 and 65 of the collar 35. There is a case where it touches the part of In this case, the pressing force applied to the collar 35 due to the tightening of the nut 34 is distributed to portions other than the projections 64 and 65 of the collar 35, and at the same time, a force in a direction to tilt the collar 35 is generated. Therefore, the pressing force to the collar 35 is weakened, and the spring portion 8 c of the head support arm 8 is not reliably pressed against the flange portion 33 a of the bearing portion 33. Therefore, the projection height of the projections 64 and 65 is set so that the nut 34 whose axis is inclined with respect to the axis of the bearing portion 33 does not come into contact with the portions other than the projections 64 and 65 of the collar 35. Is desirable.

Next, the position of the pair of pivot portions 8g provided on the arm portion 8a of the head support arm 8 will be described. In the pair of pivot portions 8g, the line 18 (see FIGS. 1 and 3) connecting the contact points P ₁ and P ₂ that contact the stepped surface of the flange portion 33a of the bearing portion 33 is the axis of the rotating shaft 5. And is perpendicular to the longitudinal center line 8j of the head support arm 8.

The contact points P ₁ and P ₂ are arranged so as to be symmetrical with respect to the axis of the rotation shaft 5 of the head support device 7, and the midpoint of the line 18 is set to the axis of the rotation shaft 5. It is desirable to make them substantially coincide. With this configuration, the head support arm 8 constituting the head support device 7 is in contact with the head support arm 8 and the bearing portion 33 at the contact points P ₁ and P ₂ , around the line 18 and on the recording medium 4. It becomes possible to rotate in a direction perpendicular to the surface of the plate. That is, the line 18 connecting the contact points P ₁ and P ₂ becomes the vertical rotation shaft 18a, and can rotate in the direction perpendicular to the surface of the recording medium 4 around the vertical rotation shaft 18a. Further, one end side of the head support arm 8 constituting the head support device 7 is urged toward the recording medium 4 by the elastic force of the elastic force generation part 8e in the spring part 8c, and the head support arm 8 is rotated counterclockwise. and, compressive stress is generated in the respective contact point _P 1, _{P 2.} Therefore, the load load of the head slider 9 on the recording medium 4 during the operation of the magnetic disk device is caused by the compressive stress in the direction of the recording medium 4 with respect to the head support arm 8 by the pivot portion 8g at the contact points P ₁ and P ₂ . Become.

  As shown in FIG. 4, the load load includes the material of the head support arm 8, the material of the elastic force generating portion 8e of the spring portion 8c, the length of the portion exhibiting the thickness and the spring performance, the height of the pivot portion 8g, The desired value can be set according to the positional relationship between the elastic force generating portion 8e and the pivot portion 8g of the spring portion 8c. The length of the portion exhibiting the spring performance is the portion from the portion corresponding to the edge portions 62b and 63b of the pressing portions 62 and 63 of the collar 35 to the root portion 8h of the elastic force generating portion 8e of the spring portion 8c. , That is, the length of the elastic force generating portion 8e.

  Further, since the pivot portion 8g is formed integrally with the head support arm 8, the manufacturing variation in the position of the pivot portion 8g with respect to the elastic force generating portion 8e can be suppressed to a very small value. Further, the tightening force of the nut 34 is transmitted to the pressing portions 61, 62, 63 through the projecting portions 64, 65 of the collar 35, whereby the pressing force of the spring portion 8c against the clamp portion 8d can be reliably generated. As a result, it is possible to realize the head support device 7 in which the variation in the load load is extremely small and the load load is stabilized, and the load load can be set independently according to the design specifications of the head support arm 8 alone. .

Further, as shown in FIG. 5, in the head support device 7, the line 18 connecting the pair of contact points P ₁ and P ₂ , that is, the position of the center of gravity of the member rotating around the vertical rotation shaft 18 a is set as the vertical rotation shaft 18 a. It is desirable that the balancer 36 having a mass (weight) set so as to substantially coincide with the middle point is fixed to one end of the coil holder 32. That is, in the head support device 7, it is desirable that the center of gravity position of the member that rotates around the vertical rotation shaft 18 a is substantially coincident with the axis of the rotation shaft 5. Here, the members that rotate around the vertical rotation shaft 18a include the head support arm 8, the gimbal mechanism 31, the head slider 9, the coil holder 32, and the voice coil 10 excluding the spring portion 8c.

  Approximately, the head support arm 8 to which the head slider 9 is attached via the gimbal mechanism 31 and the voice coil 10 is attached via the coil holder 32 is connected to the axis of the rotary shaft 5 as described above. You may make it substantially correspond to. Alternatively, the position of the center of gravity of the head support device 7 may substantially coincide with the axis of the rotation shaft 5 as described above. In this case, in the head support device 7, the deviation from the position of the center of gravity of the member that rotates around the vertical rotation shaft 18a is not a problem in practice. Although the balancer 36 is described as being fixed to one end of the coil holder 32, the balancer 36 is provided on the head slider 9 side of the head support arm 8 depending on the mass (weight) distribution of each component constituting the head support device 7. In some cases.

By configuring the head support device 7 in this way, the center of gravity of the member that rotates the head support device 7 in the direction perpendicular to the surface of the recording medium 4 about the vertical rotation shaft 18a is the center of the vertical rotation shaft 18a. You will pass over. Further, the center of gravity of the member rotating around the vertical rotation shaft 18a in the head support device 7 is configured to be on a plane perpendicular to the recording medium 4 including the vertical rotation shaft 18a. Therefore, even when the head support device 7 receives an impact force such as an impact in a direction perpendicular to the recording medium 4 from the outside, the vertical rotation shaft 18a connecting the contact points P ₁ and P ₂ of the _two pivot portions 8g. The force for rotating the head support device 7 around does not work. As a result, the load load on the recording medium 4 is not changed, and the head slider 9 does not collide with the surface of the recording medium 4 to cause damage. Can be improved.

  Further, the head support device 7 is configured as described above, and the specifications (material, thickness, width, length, etc.) of the elastic force generating portion 8e of the spring portion 8c for realizing the necessary load load are set, and the head By providing the support arm 8 with the bent portion 8l, the rigidity of the arm portion 8a can be greatly increased together with fixing the coil holder 32. As a result, the impact resistance against a large external impact or the like is improved, and the resonance frequency of the head support arm 8 can be increased. Therefore, the vibration mode that has been a problem in the past does not occur, and the settling operation is not necessary. As a result, the head support device 7 can be rotated and positioned at high speed, and the access speed of the magnetic disk device can be improved.

  Further, the arm portion 8a of the spring portion 8c integrally formed with the elastic force generating portion 8e is provided with a bent portion 81, and the coil holder 32 is fixed to increase the rigidity of the arm portion 8a. Therefore, it is possible to meet the conflicting demands of increasing the load applied to the head slider 9, increasing the flexibility, and increasing the rigidity of the structure.

  That is, it can be realized by making the arm portion 8a formed with high rigidity and the elastic force generation portion 8e of the spring portion 8c having flexibility as separate and independent components. Therefore, the design of the head support device 7 can be simplified and the degree of freedom in the design can be expanded. In addition, the head support arm can be easily formed without requiring a very precise forming process of the leaf spring portion unlike the conventional head support arm.

  Furthermore, the thickness and material of the spring portion 8c can be set independently, and the strength and spring constant of the spring portion 8c can be set to predetermined desired values. In addition, the rigidity of the arm portion 8a can be independently increased by appropriately setting the height of the bent portions 8l provided on both sides of the arm portion 8a in order to ensure the rigidity required for the arm portion 8a. Further, since the spring portion 8c is provided integrally with the arm portion 8a of the head support arm 8 (see FIGS. 4 and 5), the number of parts of the members constituting the head support device 7 can be reduced, and the cost is low. A self-balancing head support device can be realized.

  In the above-described embodiment, the spring portion 8c and the arm portion 8a are integrally formed to constitute the head support arm 8. However, the present invention is not limited to this, and the spring portion and the head support arm are not limited thereto. May be separated into separate members.

  An example is shown in FIG. 8, but instead of the collar 199 in the conventional example shown in FIG. 20, a configuration using the collar 35 in the present embodiment, that is, the head support arm 81 and the spring portion 82 are separate members. The configuration may be as follows. In this case, the head support arm 81 is formed using a material having very large rigidity, and the spring portion 82 is formed using a flexible material. The head support arm 81 is formed with a pair of pivot portions 81a and 81b (the pivot portion 81b is not shown) on the surface opposite to the head slider 9 side. In addition, one end of the spring portion 82 is fixed to the surface of the head support arm 81 on the head slider 9 side so that the rigid head support arm 81 and the spring portion 82 are integrated. As a result, a configuration similar to the head support arm 8 in the present embodiment can be obtained. Other configurations, functions, and effects are the same as in the present embodiment, and thus detailed description thereof is omitted here. In such a configuration, since the head support arm 81 itself has high rigidity, a shape that increases the rigidity of the head support arm 81 as in the head support device 7 in the present embodiment, that is, a head slider. It is not necessary to extend the coil holder 83 to the 9 side.

Further, in the present embodiment, the pair of pivot portions 8g are formed integrally with the arm portion 8a of the head support arm 8, and the apexes of the pivot portion 8g are the bearing portions at the contact points P ₁ and P ₂ , respectively. The head support arm 8 is configured to rotate in a direction perpendicular to the recording medium 4 in contact with the flange portion 33 a of 33.

  However, it may be configured as shown in FIG. In FIG. 9, a pair of pivot portions 91a and 91b (the pivot portion 91b is not shown) are formed on the flange portion 91d so as to protrude in the direction in which the screw portion 91c is formed in the bearing portion 91. The pivot portions 91a and 91b may be in contact with the head support arm 92 having a flat surface corresponding to the pivot portions 91a and 91b.

Even in such a configuration, the head support arm 92 is formed using the line connecting the contact points Q ₁ and Q _{2 at} which the apexes of the pair of pivot portions 91a and 91b contact the head support arm 92 as vertical rotation axes. It can be rotated in a direction perpendicular to the surface of the recording medium. Since other configurations, functions, and effects are the same as those of the present embodiment described above, detailed description thereof is omitted here.

Moreover, it is good also as a structure as shown in FIG. In FIG. 10, the pair of pivot portions 101a and 101b (the pivot portion 101b is not shown) is not formed in the bearing portion 102, but is formed in a pivot bearing 101 provided separately. The pivot bearing 101 is clamped by the bearing portion 102 and the nut 34 together with the clamp portion 103 b of the spring portion 103 a of the head support arm 103 and the collar 35. Even in such a configuration, the head support arm 103 is perpendicular to the surface of the recording medium with the line connecting the contact points R ₁ and R ₂ where the apexes of the pair of pivot portions 101a and 101b contact each other as a vertical rotation axis. Can be rotated in the direction. Since other configurations, functions, and effects are the same as those of the present embodiment described above, detailed description thereof is omitted here.

  FIG. 2 shows the case where the shape of the spring portion 8c formed on the head support arm 8 is an arc, but this is not always necessary. For example, it may be rectangular as shown in FIG. However, at this time, the shape of the protruding portion 35a of the collar 35 is also required to be rectangular.

  As described above, according to the present embodiment, the tightening force of the nut is transmitted from the protruding portion formed on the bottom surface of the collar, and further, the three pressing portions formed on the collar (particularly close to the rotation axis side). It is transmitted to the clamp part by the two pressing parts), and the pressing force is surely generated. As a result, the clamp part of the spring part can be reliably pressed against the flange part of the bearing part. Therefore, it is not necessary to strictly manage the color processing accuracy. As a result, it is possible to reduce the manufacturing cost of the collar, to obtain a stable load load, to realize a head support device having high impact resistance, low cost and high reliability.

  Furthermore, by installing such a head support device, it has a stable load load, high impact resistance, and can improve the head positioning control characteristics, and the magnetic head can be moved to the target track position at high speed. By moving the disk device, it is possible to realize a disk device that can greatly shorten the access time.

(Second Embodiment)
12 and 13 are diagrams for explaining a head support device according to a second embodiment of the present invention.

  FIGS. 14 to 18 are diagrams for explaining a method of fixing the head support arm and the reinforcing plate in the head support device according to the present embodiment. 12 is a side view showing the configuration of the head support device, and FIG. 13 is an exploded perspective view showing the configuration.

  14 is a plan view of a spring material thin plate in which a plurality of head support arms are held via a holding connecting portion and connecting portions, and FIG. 15 is a partially enlarged view of a part of the head supporting arm shown in FIG. is there. Further, FIG. 16 is a plan view of a reinforcing plate flat plate in which a large number of reinforcing plates are held via holding connecting portions and connecting portions. FIG. 17 is a partially enlarged view in which one reinforcing plate shown in FIG. 16 is enlarged. FIG. 18 is a partially enlarged plan view of the vicinity of the reinforcing plate fixing portion in the head support arm to which the reinforcing plate is fixed.

  The configuration of the head support device 120 according to this embodiment is different from that of the first embodiment in the following points. That is, in the present embodiment, the reinforcing plate 121 is fixed to the surface on the head slider 9 side in the clamp portion 8d of the spring portion 8c disposed on the head support arm 8.

  Hereinafter, main points different from the first embodiment will be described with reference to FIGS. 12 and 13.

  As shown in FIG. 12 and FIG. 13, the reinforcing plate 121 manufactured using a material having a large rigidity is the surface on the head slider 9 side of the clamp portion 8 d (the side that contacts the flange portion 33 a of the bearing portion 33. The surface of the clamp portion 8d on the opposite side is fixed to a predetermined position with a known technique such as spot welding with high accuracy.

  The shape of the reinforcing plate 121 is a substantially semi-annular shape (horse-shoe shape) having substantially the same shape as the shape of the clamp portion 8d to which the reinforcing plate 121 is fixed. In the portion to which the reinforcing plate 121 is fixed, the rigidity of the clamp portion 8d of the spring portion 8c is increased, and the portion is substantially rigid.

  In the spring part 8c, the part from the part where the edge part 121b abuts at the end part 121a of the part to which the reinforcing plate 121 is fixed to the root part 8h of the spring part 8c for causing the head support device 120 to generate a load load. It becomes a part that demonstrates spring performance.

  The width of the end portion 121a of the reinforcing plate 121 in the direction perpendicular to the longitudinal direction of the head support arm 8 is larger than the width of the clamp portion 8d of the head support arm 8 that contacts the edge portion 121b of the end portion 121a. It is desirable to have Accordingly, when the reinforcing plate 121 is fixed to the clamp portion 8d, even if the reinforcing plate 121 is displaced in the direction perpendicular to the longitudinal direction of the head support arm 8, the edge portion 121b of the reinforcing plate 121 is moved to the clamp portion 8d. Will abut across the entire width of the. In addition, it is desirable that the clamp portion 8d of the head support arm 8 and the reinforcing plate 121 are fixed at least at one location in the vicinity of each end portion 121a of the reinforcing plate 121.

The collar 35 has a shape similar to that of the first embodiment. Furthermore, the distance from the edges of the pressing portions 62 and 63 formed on the protruding portion 35 a of the collar 35 to the bearing portion 33, that is, the diameter line of the rotating shaft 5, is the end on the side close to the rotating shaft center of the reinforcing plate 121. The distance from the portion 121a to the diameter line of the rotating shaft 5 is made smaller. Thus, when the reinforcing plate 121 is pressed, the pressing portion of the protruding portion 35 a protrudes from both side end portions 121 a of the reinforcing plate 121. That is, the distance L ₁ in FIG. 12 (the amount of protrusion of the protruding portion 35a from the end portion 121a of the reinforcing plate 121) is set to a value larger than 0 (L ₁ > 0).

The head support device 120 includes a bearing 33, a head support arm 8 to which the head slider 9, the voice coil 10, and the reinforcing plate 121 are fixed, a collar 35, and a nut 34. Therefore, the head support arm 8 constituting the head support device 120 contacts the bearing portion 33 at the contact points S ₁ and S ₂ of the pair of pivot portions 8g, and around the line connecting the contact points S ₁ and S ₂ and It can be rotated in a direction perpendicular to the surface of the recording medium 4. That is, the line connecting the contact points S ₁ and S ₂ serves as a vertical rotation axis, and the head support arm 8 constituting the head support device 120 is configured by the elastic force of the elastic force generation unit 8 e in the spring portion 8 c of the head support arm 8. One end side is biased toward the recording medium 4.

As a result, the head support arm 8 is rotated counterclockwise, and compressive stress is generated at the respective contact points S ₁ and S ₂ . Therefore, the load load of the head slider 9 on the recording medium 4 during the operation of the magnetic disk apparatus is compressed in the direction of the recording medium 4 with respect to the head support arm 8 by the pivot portion 8g of the head support arm 8 at the contact points S ₁ and S ₂ . It is caused by stress.

  This load load corresponds to the material of the head support arm 8, that is, the material and thickness of the elastic force generating portion 8e of the spring portion 8c, and the length of the portion exhibiting the spring performance (the edge portion 121b of the fixed reinforcing plate 121). The length of the portion from the portion to the base portion 8h of the elastic force generating portion 8e), the height of the pivot portion 8g, the positional relationship between the elastic force generating portion 8e of the spring portion 8c, the pivot portion 8g, and the like. Can be set to a value.

  Since the pivot portion 8g is formed integrally with the head support arm 8, the manufacturing variation in the position of the pivot portion 8g with respect to the elastic force generating portion 8e can be suppressed to a very small level. Further, by positioning and fixing the reinforcing plate 121 with high accuracy to the clamp portion 8d of the spring portion 8c, the length of the portion from the portion corresponding to the edge portion 121b of the reinforcing plate 121 to the root portion 8h of the spring portion 8c. That is, variations in the length of the elastic force generating portion 8e can be suppressed. As a result, the manufacturing variation of the elastic force of the elastic force generating portion 8e in the spring portion 8c of the head support arm 8 can be reduced. Therefore, the manufacturing variation of the load load can be suppressed small.

Further, as shown in FIG. 7, the pressing forces F ₁ and F ₂ due to the tightening force of the nut 34 pressing the collar 35 are the pressing force F _{3 in} the pressing portion 61, the pressing force F ₄ and the pressing portion 63 in the pressing portion 62. effectively transmitted to the collar 35 as a pressing force _{F 5} at. The pressing portions 61, 62, 63 formed on the collar 35 can surely generate a pressing force against the reinforcing plate 121. Therefore, a stable load load can be obtained, and a highly reliable head support device 120 can be realized.

  Further, as described above, the configuration of the head support device 120 according to the present embodiment is the same as the configuration of the head support device 7 according to the first embodiment, except that the reinforcing plate 121 is added to the clamp portion of the spring portion 8c. The configuration is as follows. Therefore, at least the same effect as that of the head support device 7 according to the first embodiment can be obtained.

  The thickness of the reinforcing plate 121 (distance perpendicular to the surface of the recording medium 4) is the protruding height of the pivot portion 8g of the head support arm 8 (the protruding portion from the surface of the arm portion 8a on which the pivot portion 8g is formed). If the distance is sufficiently larger than the distance to the tip of the collar 35, it is not necessary to provide the protrusion 35a on the collar 35. That is, the pressing portions 61, 62, 63 and the protrusions 64, 65 may be formed on each of the ring-shaped side end surfaces parallel to the axial center of the collar 35. .

  In addition, as described in the first embodiment, the spring part and the head support arm are separated into separate members, the pair of pivots are formed in the bearing part, or the pair of pivots Can be applied to the head support device in the present embodiment. Further, the shape of the open end portion of the spring portion 8c formed on the head support arm 8 may be a rectangular shape.

  Next, a method for accurately fixing the reinforcing plate to a predetermined position of the head support arm will be described with reference to the drawings.

  As shown in FIG. 14, a state in which the shape of the head support arm 142 is held by a plurality of holding connection portions 143 is formed by using a known technique such as etching for the spring material thin plate 141. The spring material thin plate 141 is made of a material that satisfies a design specification necessary for generating a desired load load (that is, for generating a predetermined elastic force in the elastic force generating portion 142a).

  FIG. 15 is a partially enlarged view of the head support arm. The head support arm 142 is formed in a state where the head support arm 142 is connected and held to the spring material thin plate 141 by the holding connection parts 143 on both sides of the arm part 142b. In addition, a substantially rectangular recess 144 serving as an escape portion is formed on the small diameter side (the rotation center side of the rotation shaft 5) of the clamp portion 142c of the head support arm 142. A connecting portion 145 is provided so as to protrude into the recess 144, and a cut-off portion 146 is provided on the other end side of the connecting portion 145.

  14 and 15, the number of connecting portions 145 is two. However, the number is not limited to this, and one or more connecting portions may be provided. Further, the connecting portion 145 and the cut-off portion 146 are not necessarily provided.

  On the other hand, as shown in FIG. 16, a plurality of reinforcing plates 162 are connected to a reinforcing plate flat plate 161 having high rigidity and a predetermined thickness by connecting a plurality of connecting portions 163 and holding connecting portions 166. It is formed in a state.

  FIG. 17 shows a partially enlarged view of the reinforcing plate. A substantially rectangular recess 164 serving as a relief portion is formed on the small diameter side (rotation center side of the rotation shaft 5) of the semicircular reinforcing plate 162 having the same shape as the clamp portion 142c of the head support arm 142. is doing. A connecting portion 163 is formed so as to protrude into the concave portion 164. The connecting portion 163 is connected to the reinforcing plate flat plate 161 via the cut-off portion 165 and the holding connecting portion 166. When the spring material thin plate 141 is stacked on the reinforcing plate flat plate 161, the connection portion 163 and the holding connection portion 166 are connected to the respective connection portions 145 and the holding connection portion 143 of the head support arm 142 provided on the spring material thin plate 141. It overlaps with. Further, the width of the connecting portion 163 and the holding connecting portion 166 is formed to be at least larger than the width of each connecting portion 145 and the holding connecting portion 143 of the head support arm 142.

  Note that the cut-off portion 165 is not necessarily provided, and the connecting portion 163 and the holding connecting portion 166 may be directly connected. Further, similarly to the connecting portion 145 in the head support arm 142 described above, the connecting portion 163 may be one or more connecting portions. Further, the holding connecting portion 166 does not need to be disposed at a position overlapping the holding connecting portion 143 of the head support arm 142, and the reinforcing plate 162 is held on the reinforcing plate flat plate 161 and is reinforced after being fixed to the head supporting arm 142. Any position where separation from the plate flat plate 161 is possible.

  A method of making the plurality of reinforcing plates 162 correspond to the reinforcing plate flat plate 161 is performed as follows.

  First, when the spring material thin plate 141 is stacked on the reinforcing plate flat plate 161, the plurality of reinforcing plates 162 are overlapped at positions corresponding to the clamp portions 142c of the plurality of head support arms 142.

  Next, when another spring material thin plate 141 is stacked on the reinforcing plate flat plate 161 at a different pitch in the y direction shown in FIG. 16, a plurality of spring material thin plates 141 are placed at positions corresponding to the clamp portions 142c shown in FIG. The reinforcing plates 162 are overlapped. In this way, when a plurality of spring material thin plates 141 are stacked on one reinforcing plate flat plate 161 while shifting the pitch in the longitudinal direction of the head support arm 142 formed on one spring material thin plate 141. The plurality of reinforcing plates 162 formed on the reinforcing plate flat plate 161 are overlapped with each other at positions corresponding to the plurality of clamp portions 142c formed on each spring material thin plate 141. A number of reinforcing plates 162 are arranged vertically and horizontally on the reinforcing plate flat plate 161 in consideration of efficient use of materials so that the material waste portion of the processed reinforcing plate flat plate 161 is reduced.

  As shown in FIG. 14, the spring material thin plate 141 is provided with, for example, a pair of positioning reference holes 141a, and the positions of the plurality of head support arms 142 formed on the spring material thin plate 141 with reference to the pair of positioning reference holes 141a. Decide. Further, a pair of positioning reference holes 141b and 141c are provided in the spring material thin plate 141 in correspondence with the y-direction pitch of the reinforcing plate flat plate 161 shown in FIG. Further, the reinforcing plate flat plate 161 is provided with a pair of positioning reference holes 161 a corresponding to the pair of positioning reference holes 141 a provided in the spring material thin plate 141.

  A plurality of reinforcing plates 162 are formed at positions corresponding to the clamp portions 142c formed in the spring material thin plate 141 with reference to the positioning reference holes 161a. That is, the positions of the plurality of reinforcing plates 162 are determined at the same pitch as the vertical and horizontal pitches of the clamp portions 142c. Further, when the positioning reference hole 161a of the reinforcing plate flat plate 161 is made to correspond to another positioning reference hole 141b of the spring material thin plate 141 and the pitch of the spring material thin plate 141 is shifted, it corresponds to the clamp portion 142c with respect to the positioning reference hole 141b. The reinforcing plate 162 is arranged at a position so that a plurality of reinforcing plates 162 are formed.

  The same applies to the case where the positioning reference hole 161a of the reinforcing plate flat plate 161 is made to correspond to another positioning reference hole 141c of the spring material thin plate 141, and the pitch of the spring material thin plate 141 is shifted. To do.

  In this way, all the reinforcing plates 162 formed on one reinforcing plate flat plate 161 can correspond to all the head supporting arms 142 formed on the plurality of spring material thin plates 141, and the head supporting arms The reinforcing plate 162 is positioned at a predetermined position of the clamp portion 142c of 142.

  That is, if the arrangement is efficiently performed on a single flat plate, the pitch in the y direction of the head support arms 142 shown in FIG. 14 does not match the pitch of the reinforcing plates 162 shown in FIG. This is solved by positioning reference holes 141b and 141c for the positioning reference hole 141a shown in FIG.

  Next, a process of fixing the reinforcing plate 162 to the head support arm 142 will be described.

  First, the positioning reference hole 141 a provided in the spring material thin plate 141 is aligned and overlapped with the positioning reference hole 161 a provided in the reinforcing plate flat plate 161. Next, the clamp portions 142c of the respective head support arms 142 formed on the spring material thin plate 141 and the respective reinforcing plates 162 of the reinforcing plate flat plate 161 overlapped with each other are fixed by a known technique such as spot welding.

  Thereafter, the holding connecting portion 143 and the connecting portion 145 connected to the head support arm 142, and the holding connecting portion 166 and the connecting portion 163 of the reinforcing plate 162 are cut using a known technique such as laser processing or pressing. In this manner, the head support arm 142 in which the reinforcing plate 162 is fixed to the clamp portion 142c can be manufactured.

  Next, the positioning reference hole 141 b provided in another spring material thin plate 141 is aligned and overlapped with the positioning reference hole 161 a provided in the reinforcing plate flat plate 161.

  Next, the clamp portions 142c of the respective head support arms 142 formed on the spring material thin plate 141 and the respective reinforcing plates 162 of the reinforcing plate flat plate 161 are fixed to each other by a known technique such as spot welding. Thereafter, the holding connecting portion 143 and the connecting portion 145 connected to the head support arm 142 and the holding connecting portion 166 and the connecting portion 163 of the reinforcing plate 162 are cut using a known technique such as laser processing or press processing, respectively. To do. In this manner, a plurality of head support arms 142 in which the reinforcing plate 162 is fixed to the clamp portion 142c can be manufactured.

  Similarly, using the positioning reference hole 141c provided in another spring material thin plate 141, the reinforcing plate flat plate 161 and another spring material thin plate 141 are aligned and overlapped. .

  Next, the clamp part 142c and the reinforcing plate 162 overlapped with the clamp part 142c are fixed to each other by a known technique such as spot welding. Thereafter, the holding connecting portion 143 and the connecting portion 145 of the head support arm 142, and the holding connecting portion 166 and the connecting portion 163 of the reinforcing plate 162 overlapping with each other are cut, and the reinforcing plate 162 is fixed to the clamp portion 142c. A plurality of support arms 142 are produced.

A state in which the reinforcing plate 162 is fixed to the clamp portion 142c is shown in FIG. Next, the holding connecting portion 143 and the connecting portion 145 of the head support arm 142, and the holding connecting portion 166 and the connecting portion 163 of the reinforcing plate 162 overlapping them are cut at the cutting positions C ₁ and C ₂ , respectively. In this way, the head support arm 142 having the reinforcing plate 162 fixed to the clamp portion 142c is obtained.

It should be noted that the following points need to be taken into consideration regarding the cutting of the holding connecting portion 143 and the connecting portion 145 of the head support arm 142 and the connecting portion 163 and the holding connecting portion 166 of the reinforcing plate 162. That is, a holding coupling portion 143 of the head support arm 142 with respect to the cutting of the holding connection portion 166 of the reinforcing plate 162 overlapping them, a cutting position _{C 1} as close as possible to part the arm portion 142b of the head supporting arm 142 It is desirable to do. Further, with respect to the cutting of the connecting portion 145 of the head support arm 142 and the connecting portion 163 of the reinforcing plate 162 that overlaps with the connecting portion 145, the small diameter side of the reinforcing plate 162 is formed at the opening of the recess 164 formed in the reinforcing plate 162. it is desirable to set the cutting position C ₂ than arcuate line 164a constituting the inner surface in the recess 164 side.

Therefore, in the reinforcing plate 162 fixed to the head support arm 142, the connecting portion 163 from the side surface of the reinforcing plate 162 to the cutting position C ₂ remains as the protruding portion 162 a of the reinforcing plate 162 in the concave portion 164. become.

  Further, regarding the fixing position such as spot welding for fixing the clamp portion 142c of the head support arm 142 and the reinforcing plate 162, in the vicinity of each end portion 162b of the reinforcing plate 162, as indicated by a black dot T in FIG. It is desirable to fix.

  When the head support device is assembled using the head support arm 142 to which the reinforcing plate 162 is fixed in this manner, the spring portion 142d including the clamp portion 142c and the elastic force generating portion 142a in the head supporting arm 142 is provided with the reinforcing plate 162. There is no such thing as floating from the edge of the. Further, the portion of the reinforcing plate 162 is deformed at the abutting portion. Therefore, the length of the elastic force generation portion of the spring portion 142d that generates a load load as the head support device is the base portion of the spring portion 142d with respect to the arm portion 142b from the contact portion 142e that contacts the edge portion of the reinforcing plate 162. The distance is up to 142f.

  Therefore, as described above, the positions of the plurality of head support arms 142 and the plurality of reinforcement plates 162 are determined and fixed with reference to the positioning reference hole, thereby greatly varying the mounting position of the reinforcement plates 162 with respect to the head support arms 142. Can be kept small. Further, the variation in load load when assembled as a head support device can be suppressed very small.

  Since the head support device 120 is manufactured by using the head support arm 142 to which the reinforcing plate 162 is fixed in this manner, variations in the specifications of the spring portion of the head support arm can be suppressed to a very small level. As a support device, variation in load load can be suppressed.

  As described above, according to the present embodiment, not only the same effects as those of the first embodiment can be obtained, but also the fixing position of the reinforcing plate fixed to the clamp portion of the spring portion in the head support arm. Variations can also be prevented. In addition, it is possible to easily form the elastic force generating portion that can greatly reduce the size specification of the elastic force generating portion for generating the load load, particularly the length variation. Furthermore, variations in other influential factors that generate a load load, such as the height of the pivot portion and the positional relationship between the elastic force generating portion and the pivot portion, can be made very small. As a result, the manufacturing variation of the elastic force generated in the elastic force generating portion of the head support arm can be made very small, and thus the load load can be made very small. As a result, it is possible to realize a head support device with high manufacturing quality, stable load load, high impact resistance, and high reliability.

  Furthermore, by mounting such a head support device, it is possible to realize a disk device with small manufacturing variation, a stable load load, and high impact resistance. As a result, the head positioning control characteristics can be improved, the magnetic head can be moved to the target track position at high speed, and the access time can be greatly shortened.

  In the description of the first embodiment and the second embodiment described above, the magnetic disk device has been described as an example. However, the present invention is not limited to this. It can be easily applied to a contact type disk recording / reproducing apparatus.

  As described above, the head support device according to the present invention can suppress the variation of the load load on the recording medium and can provide a stable load load. Therefore, the stability and reliability can be improved. It is useful for the magnetic recording / reproducing apparatus used and the non-contact type disk recording / reproducing apparatus such as a magneto-optical disk apparatus and an optical disk apparatus.

1 is a plan view showing the main part of a magnetic disk device according to a first embodiment of the invention; The top view which shows a head support arm in the head support apparatus used for the magnetic disc apparatus of the embodiment A plan view showing a configuration of a head support device used in the magnetic disk device of the same embodiment Side view showing the configuration of the head support device used in the magnetic disk device of the same embodiment FIG. 3 is an exploded perspective view showing a configuration of a head support device used in the magnetic disk device of the same embodiment. The figure which shows the structure of a color | collar in the head support apparatus used for the magnetic disc apparatus of the embodiment. The figure which shows the contact state of a nut and a color | collar when a nut is tightened in the head support apparatus used for the magnetic disc apparatus of the embodiment. Side view showing the configuration of another example of the head support device used in the magnetic disk device of the same embodiment The partial side view which shows the structure of the other example of the head support apparatus used for the magnetic disc apparatus of the embodiment The partial side view which shows the structure of the other example of the head support apparatus used for the magnetic disc apparatus of the embodiment The partial top view which shows another example with respect to the shape of the spring part in a head support arm in the head support apparatus used for the magnetic disc apparatus of the embodiment A side view showing composition of a head support device concerning a 2nd embodiment of the present invention. The exploded perspective view which shows the structure of the head support apparatus concerning the embodiment The top view of the spring material thin plate by which the several head support arm was hold | maintained via the holding | maintenance connection part and the connection part in the head support apparatus concerning the embodiment FIG. 14 is a partially enlarged view of a part of the head support arm shown in FIG. 14 in the head support device according to the embodiment. The top view of the flat plate for reinforcement plates in which many reinforcement plates were hold | maintained via the connection part and connection part in the head support apparatus concerning the embodiment In the head support device according to the same embodiment, a partially enlarged view in which one reinforcing plate shown in FIG. 16 is enlarged. In the head support device according to the embodiment, a partially enlarged plan view of the vicinity of the reinforcing plate fixing portion in the head supporting arm to which the reinforcing plate is fixed Side view showing the configuration of a conventional head support device An exploded perspective view showing a configuration of a conventional head support device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotation center 2 Rotating shaft 3 Rotor hub part 4,196 Recording medium 5 Rotating shaft 6 Bearing 7,120 Head support device 8,81,92,103,142,192 (Head) Support arm 8a, 142b Arm part 8b Tab part 8c, 82, 103a, 142d Spring part 8d, 103b, 142c Clamp part 8e, 142a Elastic force generation part 8f, 32a Hole part 8g, 81a, 81b, 91a, 91b, 101a, 101b Pivot part 8h, 142f Root part 8i Virtual Point 8j Center line 8k, 18, 164a Line 8l Bending part 8m Dimple 8n Notch 9,191 (Head) Slider 10,200 Voice coil 11 Magnet 12 Upper yoke 13 Lower yoke 14 Lamp part 15 Lamp block 16, 17 Crash Stop 18a Direct rotation shaft 31 Gimbal mechanism 32, 83, 201 Coil holder 33, 91, 102, 197 Bearing part 33a, 91d, 197a Flange part 33b, 91c, 197b Screw part 33c, 197c Cylindrical part 34, 198 Nut 35, 199 Color 35a, 162a, 199a Protruding part 36 Balancer 61, 62, 63 Pressing part 61c, 62c, 63c Point 62a, 63a, 121a, 162b End part 62b, 63b, 64a, 65a, 121b Edge part 64, 65 Protruding part 66, 69 Diameter line 67, 68 Straight line 101, 195 Pivot bearing 121, 162 Reinforcement plate 141 Spring material thin plate 141a, 141b, 141c, 161a Positioning reference hole 142e Abutting part 143, 166 Holding connection part 144, 164 Recession 145, 163 Connection part 14 , 165 cut off portion 161 reinforcing plate flat plates 193 leaf spring 194 spring fixing member 195a, 195b top 199b bottom 199c top C _{1, C 2} cutting position L ₁ distance _{P 1, P 2, Pa,} Pb, Q 1, Q 2 , R ₁ , R ₂ , S ₁ , S ₂ contact points

Claims (17)

A head support device capable of rotating in a radial direction of a recording medium around a horizontal rotation axis and capable of rotating in a direction perpendicular to the recording medium around a vertical rotation axis;
A head slider equipped with a head;
The head slider is disposed at one end via a gimbal mechanism, and a coil holder to which a voice coil constituting a voice coil motor rotating in the radial direction of the recording medium is fixed is disposed on the other side. A head support arm;
A bearing portion serving as a center of the horizontal rotation shaft in which the head support arm rotates in a radial direction of the recording medium;
A pair of pivot portions whose apexes serve as a rotation center of the vertical rotation shaft that rotates the head support arm in a direction perpendicular to the surface of the recording medium;
Elastic means for applying a biasing force in a direction perpendicular to the surface of the recording medium to the head support arm;
A collar that presses the elastic means;
A nut that is screwed into the threaded portion of the bearing portion,
By holding the elastic means between the flange portion of the bearing portion and the nut via the collar, the head is supported in a direction perpendicular to the recording medium around a line connecting the apexes of the pair of pivot portions. A head support device characterized in that the arm is rotatable and the collar has at least one pressing portion on one end face and at least one protrusion on the other end face. The collar is formed of a cylinder having a plurality of pressing portions on the one end face and a plurality of protrusions on the other end face,
The edge portion of the protrusion on the side close to the diameter line in the direction perpendicular to the center line in the longitudinal direction of the head support arm, the edge portion of the pressing portion that is closest to the diameter line, and the diameter line So as to be located between the edge portions of the pressing portion farthest from the center line in the regions on both sides of the center line. The head support device according to claim 1, wherein the head support device is arranged. 3. The head support device according to claim 1, wherein an edge portion on a side near the diameter line of the protrusion is disposed on a straight line parallel to the diameter line. 4. The edge part of the side close | similar to the diameter line of the said protrusion part is formed so that it may be perpendicular | vertical to the centerline of the longitudinal direction of the said head support arm. The head support device according to the description. The head according to any one of claims 1 to 4, wherein the collar has a protrusion at one end thereof, and the pressing portion is provided at an end of the protrusion. Support device. 6. The collar according to claim 1, wherein the collar is formed such that an edge portion close to a diameter line of the pressing portion is perpendicular to a center line in a longitudinal direction of the head support arm. The head support device according to any one of the above. The head support device according to claim 6, wherein the edge portion of the pressing portion on the side close to the diameter line is disposed on one straight line parallel to the diameter line. 2. The head support according to claim 1, wherein in a direction perpendicular to a longitudinal direction of the head support arm, a width of the elastic means that contacts the pressing portion is smaller than a width of an edge portion of the pressing portion. apparatus. The reinforcing plate is fixed to a surface of the elastic means opposite to the flange portion side of the bearing portion, and the pressing portion presses the reinforcing plate. The head support device according to any one of the above. The head according to claim 9, wherein, in a direction perpendicular to the longitudinal direction of the head support arm, a width of an end portion of the reinforcing plate is larger than a width of the elastic means in a portion where the reinforcing plate abuts. Support device. The width of the reinforcing plate at a portion where the pressing portion abuts in a direction perpendicular to the longitudinal direction of the head support arm is smaller than the width of the edge portion of the pressing portion. The head support device according to 10. In the longitudinal direction of the head support arm, the edge portion of the pressing portion on the side close to the diameter line of the collar in the direction perpendicular to the longitudinal center line of the head support arm is the diameter line of the horizontal rotation shaft. The head support device according to any one of claims 9 to 11, wherein the head support device is disposed at a position closer to a diameter line of the horizontal rotation shaft than an end portion of the reinforcing plate on a closer side. When the nut is tightened by screwing into the threaded portion of the bearing portion, the end surface of the nut inclined according to the gap between the threaded portion and the nut is only on the projection provided on the collar. The head support device according to claim 1, wherein the protrusion height of the protrusion is set so as to abut. The head support device according to claim 1, wherein the pair of pivot portions are formed on the head support arm. The head support device according to any one of claims 1 to 13, wherein the pair of pivot portions are formed on the flange portion of the bearing portion. A pair of the pivot portions are formed in a pivot bearing, and the pivot bearing is disposed on the nut side of the bearing portion, and together with the elastic means and the reinforcing plate via the collar, the flange portion and the nut The head support device according to claim 1, wherein the head support device is sandwiched between the head support device and the head support device. A recording medium rotated by a spindle motor;
A head support device having a signal conversion element facing the recording medium and recording a signal on the recording medium or reproducing a signal from the recording medium,
17. The disk device according to claim 1, wherein the head support device is the head support device according to any one of claims 1 to 16.

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