JP3408902B2 - Magnetic recording / reproducing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus, and more particularly to a guide mechanism for a slide plate mounted on a chassis so as to be able to move forward and backward.

[0002]

2. Description of the Related Art In a magnetic recording / reproducing apparatus for recording / reproducing information on / from a magnetic disk incorporated in a disk cartridge, a slide plate mounted on a chassis so as to be able to move forward and backward, and this slide plate. And a holder that moves up and down in cooperation with. A tension spring is stretched between the slide plate and the holder, and the slide plate is urged by the tension spring in the forward direction of the chassis. Further, a lock plate is arranged on the chassis, and when the disc cartridge is not mounted, the holder is held at the unloading position by locking the slide plate and the lock plate at the retracted position. Has become. On the other hand, when the disc cartridge is mounted, the locking of the slide plate and the lock plate is released during the mounting, so that the slide plate moves in the forward direction of the chassis by the tension spring, and the cam groove of the slide plate moves. Since the holder descends along with it, the disc cartridge held by the holder also moves from the unloading position to the loading position.

In the magnetic recording / reproducing apparatus having such a structure, it is necessary that the slide plate is restricted from moving vertically and horizontally with respect to the chassis and is guided so as to be movable only in the front-back direction. As a guide mechanism for such a slide plate, the structure shown in FIGS. 48 and 49 is conventionally known. In these figures, reference numeral 100
Is a chassis, reference numeral 101 is a slide plate, and both the chassis 100 and the slide plate 101 are formed of a metal plate such as an iron plate. The chassis 100 has a plurality of guide protrusions 10
2 are formed, and the slide plate 101 is formed with a plurality of guide holes 103 corresponding to the respective guide protrusions 102. Each of the guide protrusions 102 has an upper arm portion 102a and a lower arm portion 102b that are opposed to each other at a predetermined interval in the vertical direction. The guide protrusions 102 are formed by pressing a plate surface of the chassis 100 into a predetermined shape, It is formed by bending this at a right angle. On the other hand, each guide hole 103 has a plan view T.
The guide hole 103 is formed in a character shape, and the guide hole 103 is inserted from directly above the guide protrusion 102 using the wide portion 103a, and then is horizontally displaced to guide the narrow portion 103b having the long hole shape. The protrusion 102 is held between the upper arm 102a and the lower arm 102b. As a result, as shown in FIG. 49, the slide plate 101 is placed on the chassis 100, and the upper arm portion 102a and the lower arm portion 10 of the guide protrusion 102 to which the narrow portions 103b of the guide holes 103 correspond.
By moving between 2b, the slide plate 101 is restricted from moving vertically and horizontally with respect to the chassis 100, and can move only in the front-back direction (the arrow direction in FIG. 49).

[0004]

By the way, in the above-mentioned conventional magnetic recording / reproducing apparatus, the lower surface of the slide plate 101 is the upper surface of the lower arm portion 102b of each guide protrusion 102 (indicated by symbol S in FIG. 48). Since the slide plate 101 moves in the front-rear direction of the chassis 100 while sliding on the (part), the slide plate 101 must be maintained at a high degree of smoothness on the upper surface of the lower arm part 102b. 101 cannot be moved smoothly. However, as described above, since the guide protrusion 102 is formed by pressing the plate surface of the chassis 100 and then bending the plate surface at a right angle, the upper surface of the lower arm portion 102b has a fracture surface at the time of pressing. Therefore, it is extremely difficult to obtain the smoothness of the surface with high accuracy. Further, in order to move the slide plate 101 smoothly, the height dimension H of each guide protrusion 102 to the upper surface of the lower arm portion 102b must be kept constant, but this height dimension H is a guide. Protrusion 1
Since it varies depending on the bending position of No. 02, even if the smoothness of the upper surface of each lower arm 102b is maintained with high accuracy, the parallelism of the entire sliding surface is increased due to the variation of the bending position. Will be damaged. Furthermore, if the perpendicularity of each guide protrusion 102 to the plate surface of the chassis 100 is not accurately maintained, the upper surface of the lower arm portion 102b is inclined with respect to the plate surface of the chassis 100 and the slide plate 10
Since the lower surface of 1 is caught on the corner of the upper surface of the lower arm portion 102b, the smooth movement of the slide plate 101 is hindered also from this point.

The present invention has been made in view of the above circumstances of the prior art, and an object thereof is to provide a head transfer mechanism of a magnetic recording / reproducing apparatus capable of smoothly moving a slide plate forward and backward with respect to a chassis. To provide.

[0006]

In order to achieve the above object, the present invention provides a chassis made of a metal plate, a slide plate made of a metal plate mounted on the chassis so as to be able to move forward and backward, and the slide. It cooperates with the plate and
A holder that moves up and down between an unloading position and a loading position together with a disk cartridge that moves only in the vertical direction with respect to the chassis, and is stored in the chassis. And a guide protrusion that restricts the movement in the left-right direction are integrally formed, and the slide plate is
With the movable only rearward, up to one or both opposing surfaces of the sliding plate and the chassis
It is most preferable that a protrusion having a predetermined height is formed by swelling by swelling and the slide plate is configured to reciprocate forward and backward on the chassis with the protrusion as a sliding surface. It has a major feature. Further, in the above structure, it is preferable that the protrusion is formed within 10 mm of the guide protrusion, or the same kind of zinc plating is applied to the surfaces of the chassis and the slide plate.

[0007]

[Operation] When mounting or ejecting the disc cartridge,
The slide plate moves forward and backward on the chassis with the protrusion formed on one or both of the opposite faces of the chassis and slide plate as the slide surface, and cooperates with the slide plate and the front side.
With respect to the chassis, a holder that moves only in the vertical direction moves up and down between the unloading position and the loading position together with the disk cartridge. Here, the protrusion is formed by swelling the chassis or the slide plate in the plate thickness direction and pressing it.
Since it is formed to have a predetermined height by processing , the smoothness and the amount of protrusion of the protrusion can be maintained with high accuracy, and the slide plate can be smoothly moved with respect to the chassis. Also,
10 of guide protrusions integrally formed with the protrusion on the chassis
When it is formed within a range of less than 10 mm, the protrusion, which is the sliding surface of the slide plate, is located near the guide protrusion that regulates the vertical and horizontal movement of the slide plate. The plate can be moved more smoothly with respect to the chassis. Furthermore, when the same kind of plating is applied to the surface of the chassis and the slide plate, for example, zinc plating, the same kind of plating makes sliding contact with the sliding surface of the protrusion, which also makes the slide plate smoother to the chassis. It can be moved.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 47 are for explaining one embodiment of the present invention. FIG. 1 is a plan view of a magnetic recording / reproducing apparatus, FIG. 2 is a front view of the magnetic recording / reproducing apparatus, and FIG. FIG. 4 is a rear view, FIG. 4 is a side view of the magnetic recording / reproducing apparatus, FIG. 5 is a plan view of a disk cartridge, FIG. 6 is a plan view showing an upper cover removed from FIG. 1, FIG. FIG. 9 is a side view, FIG. 9 is a plan view showing a holder removed from FIG.
10 is a plan view of the chassis, FIG. 11 is a side view of the chassis, FIG. 12 is a perspective view showing guide protrusions and projections of the chassis, FIG. 13 is a plan view of a slide plate, and FIG. 14 is a rear face of the slide plate. FIG. 15 is a side view of the slide plate, FIG. 16 is a cross-sectional view showing an engaged state of the chassis and the slide plate, and FIG.
Is a plan view of the holder, FIG. 18 is a rear view of the holder, and FIG.
FIG. 20 is a side view of the holder, FIG. 20 is an explanatory view showing a state where the outer shape of the holder is extracted from a base material, and FIG. 21 is a perspective view showing a main part of a shutter opening / closing mechanism.

As shown in FIGS. 1 to 4, a magnetic recording / reproducing apparatus according to this embodiment includes an upper cover 1 and a lower cover 2 which are joined and integrated with each other to form a housing, and these upper and lower covers. Mechanism body housed inside 1, 2 and front plate 3 attached to the front opening of the upper and lower covers 1, 2.
It consists of and. The front plate 3 has a horizontally long insertion opening 3
The eject button 4 which will be described later is arranged so that it can be put in and out. Further, a door 5 is provided on the back side of the front plate 3.
Is rotatably supported, and the door 5 is biased by a coil spring (not shown) in a direction of closing the insertion opening 3a.

The disk cartridge 6 used in the above magnetic recording / reproducing apparatus is a known one, and as shown in FIG.
Cartridge case 7 made of hard plastic
And a magnetic disk 8 rotatably housed inside the cartridge case 7, and a shutter 9 that can reciprocate along one side edge of the cartridge case 7. One corner of the cartridge case 7 is cut off in a taper shape, and that portion serves as an erroneous insertion prevention portion 7a.
The shutter 9 is bent in a U shape, and rectangular window holes 9a are formed on both upper and lower surfaces thereof, and an opening 7b corresponding to the window holes 9a is also formed in the cartridge case 7. This shutter 9 is opened by a spring (not shown).
Although it is biased in the direction of closing b, when the disc cartridge 6 is inserted into the inside of the front plate 3 from the insertion opening 3a, the shutter opening / closing mechanism described later causes the opening 7b and the window hole 9a to coincide with each other. When moved, the magnetic disk 8 is exposed through the opening 7b and the window 9a.

As shown in FIGS. 6 to 9, the mechanism body is a chassis 10 fixed to the upper surface of the lower cover 2.
And a slide plate 11 mounted on the upper surface of the chassis 10 so as to be able to move forward and backward, a holder 12 held by the slide plate 11, and the like. Hereinafter, these chassis 10
The specific configurations of the slide plate 11 and the holder 12 will be described.

The chassis 10 is formed by galvanizing the upper and lower surfaces of an iron plate as a base material. As shown in FIGS. 10 to 12, standing walls 10a and 10b are formed at the front and rear ends of the chassis 10, respectively, and a circular hole 10c is formed near the standing standing wall 10a at the front. Around the circular hole 10c, a plurality of L-shaped guide protrusions 10d are cut and raised from the bottom surface at a right angle to be integrally formed. Two guide protrusions 10d are provided on each side of the chassis 10 and four on each of the left and right sides. Individually formed. The bottom surface of the chassis 10 has a plurality of protrusions 10e.
Are formed to project upward, and these protrusions 10e
Is arranged in the vicinity of each guide protrusion 10d, preferably within 10 mm. Each protrusion 10e is formed by subjecting the chassis 10 to press processing called a half punch in the plate thickness direction. As described above, since the chassis 10 is galvanized in advance, each protrusion 10e is It will have a flat surface that is galvanized on the surface.
In addition, a plurality of reinforcing ribs 10f are provided on the bottom surface of the chassis 10.
And a support wall 10h which faces the two stopper projections 10g that define the lowered position of the disc cartridge 6 and the rear standing wall 10b with a predetermined space.
Etc. are formed by bending. Further, notches 10i are formed on the left and right side surfaces of the chassis 10, and screw holes 10j are formed in the rear standing wall 10b.

As with the chassis 10, the slide plate 11 is also made of an iron plate as a base material, the upper and lower surfaces of which are galvanized. As shown in FIGS. 13 to 15, the slide plate 11 is bent and formed in a U-shaped cross section, and an opening 11a is formed at the center of the bottom surface thereof.
Further, a mounting piece 11b and a locking claw 11c are formed by bending at the front and rear ends of the slide plate 11, and the eject button 4 can be mounted on the mounting piece 11b. Further, a plurality of guide holes 11d and one insertion hole 11f are formed in the bottom surface of the slide plate 11, and two side walls of the slide plate 11 are provided on each side.
Four cam grooves 11e are formed on both left and right sides. The slide plate 11 has the guide holes 11d and the guide protrusions 1
0d and one stopper projection 10g, and the other stopper projection 10g is inserted into the insertion hole 11f and placed on the chassis 10. Each guide hole 11d is vertically and horizontally moved by the corresponding guide projection 10d. By restricting the position of the chassis 10, the chassis 10 can be moved only in the front-rear direction (see FIG. 9). At that time,
As shown in FIG. 6, the lower surface of the slide plate 11 is the chassis 10
Sliding on the upper surface of each protrusion 10e formed on the
Since the smoothness and the amount of protrusion of e are maintained with high accuracy depending on the die size of the press machine for performing half punching, the lower surface of the slide plate 11 is a flat surface formed by the upper surface of each protrusion 10e. It can slide smoothly on a virtual plane. The lower surface of the slide plate 11 and the upper surface of the protrusion 10e are both galvanized, and the chassis 10
Since the same type of plating material slides on the sliding surfaces of the slide plate 11 and the slide plate 11, the slide plate 11 can be slid smoothly on the chassis 10. Further, since each protrusion 10e is arranged in the vicinity of the corresponding guide protrusion 10d, preferably within 10 mm, even if the chassis 10 is slightly deformed (warped), the guide defect due to the deformation is suppressed. Also from this point, the slide plate 11 can be slid smoothly on the chassis 10.

As with the chassis 10 and the slide plate 11, the holder 12 is also made of an iron plate which is a base material and is galvanized on both upper and lower surfaces. 17 to 19
As shown in FIG. 3, the holder 12 is bent to have an inverted U-shaped cross section, and the support pieces 12a facing the upper surface of the holder 12 are formed at the lower ends of both side surfaces of the holder 12 at a predetermined interval. On the upper surface of the holder 12, a bulged portion 12b that bulges slightly upward is formed, and a long hole 12c extending in the front-rear direction and an arc-shaped escape hole 12d are formed in the bulged portion 12b. A retaining protrusion 12e is formed in the vicinity of the bulging portion 12b by bending, and a locking hole 12f is formed. Further, a stopper projection piece 12g is formed at the front end of the upper surface of the holder 12, and the stopper projection piece 1 is formed.
The width W1 of 2 g is equal to or smaller than the width W2 of the long hole 12c (W1
≦ W2) is set. Further, on the side surface of the holder 12, two protrusions are provided on each side, and four protrusions 12 are provided on the left and right sides.
While h is formed, a hanging piece 12i extending downward is formed.

As shown in FIG. 20, the holder 12 is formed into a shape as described above by drawing a flat plate-shaped base material (zinc-plated iron plate) from its outer shape and then bending it. It At the time of removing the outer shape, the width dimension W1 of the stopper protrusion 12g and the width dimension W of the elongated hole 12c.
Since the relationship with 2 is set to W1 ≦ W2, it is generated from the base material by locating the stopper projection piece 12g formed in any holder 12 in the elongated hole 12c formed in another holder 12. Scrap can be reduced as much as possible. That is, the convex portion that remains in the base material when the concave long hole 12c is punched out is originally discarded as scrap, but since this portion can be used as the stopper protrusion 12g of another holder 12, the mother portion can be used. Waste of material can be reduced.

6 to 9, the holder 12 is inserted between both side surfaces of the slide plate 11, and the tension spring 1 is provided between the upper surface of the holder 12 and one side surface of the slide plate 11.
3 is hooked. Here, the hanging piece 12 of the holder 12
i penetrates the bottom surface of the slide plate 11 and the chassis 10
Is inserted into the notch 10i, and the holder 12 is restricted by the engagement of the hanging piece 12i and the notch 10i so that the holder 12 can move only in the vertical direction with respect to the chassis 10.
On the other hand, as described above, the slide plate 11 is attached to the chassis 10
Since it can move only in the front-back direction of the slide plate 11,
Is urged toward the front end of the chassis 10 by a tension spring 13. Further, a rotating member 14 is arranged behind the slide plate 11 and the holder 12, and the rotating member 14 is rotatably supported by a support shaft 15 planted in the chassis 10 and has a twisted coil spring. It is urged by 16 in the counterclockwise direction in FIG.

The rotating member 14 is made of a plastic molding material, and as shown in FIG.
A cylindrical shaft portion 14a inserted into the support shaft 15 and the shaft portion 1
It has a pair of arm portions 14b and 14c protruding laterally from 4a. A pair of hook-shaped support walls 14d and 14e are formed on the upper end of the shaft portion 14a.
The torsion coil spring 16 is wound around 4d and 14e. At that time, a pair of slits 14f extending in the axial direction are formed between the support walls 14d and 14e, and
Since the one support wall 14e is formed to be thicker than the other support wall 14f, the winding portion of the torsion coil spring 16 is made to bend the support wall 14e on both sides by bending the support wall 14e on the thin side. , 14e can be easily inserted. Further, a shutter opening / closing pin 14g is provided upright on the tip of one arm portion 14b.
g penetrates the escape hole 12d and reaches above the holder 12, and one end of the torsion coil spring 16 is hooked on the shutter opening / closing pin 14g. Further, the other arm 14
A locking claw 14h is formed at the tip of c, and the locking claw 14h can be engaged with and disengaged from the locking claw 11c of the slide plate 11. The other end of the torsion coil spring 16 passes through the retaining projection 12e of the holder 12, and a bent portion 16a formed at the tip thereof is locked in the locking hole 12f.

FIG. 22 is a plan view of the head transfer mechanism, and FIG.
24 is a sectional view of the head transfer mechanism, FIG. 24 is a plan view of a carriage provided in the head transfer mechanism, FIG. 25 is a rear view of the carriage, FIG. 26 is a rear view of the carriage, and FIG.
25 is a sectional view taken along the line AA of FIG. 25, FIG. 28 is an explanatory view showing a state in which a follower spring is attached to the carriage, FIG.
FIG. 30 is a perspective view showing a head mounting portion of the carriage, FIG. 30 is a sectional view of the mounting state of the carriage and the lower magnetic head as seen in the longitudinal direction, FIG. 31 is a sectional view as seen in the lateral direction thereof, and FIG. 33 is a plan view of a hold case provided in the head transfer mechanism, FIG. 33 is a plan view of an essential part showing a mounting portion of the hold case and the carriage, and FIG.
It is sectional drawing which follows the B line.

A head transfer mechanism 17 is arranged at the rear of the chassis 10, and as shown in FIGS.
The head transfer mechanism 17 includes a carriage 18 and a hold case 19 hinged above the carriage 18. The carriage 18 and the hold case 19 are both formed of a plastic material, and the lower magnetic head 20 is fixed to the upper surface of the carriage 18 and the upper magnetic head 21 is fixed to the lower surface of the hold case 19.

As shown in FIGS. 24 to 27, a stepped connecting portion 18a is formed at the rear portion of the carriage 18, and a circular groove 18b, a screw hole 18c, and a screw hole 18c are formed on the upper surface of the connecting portion 18a. Restricting projection 18d, pair of positioning pins 18
e, a spring receiving portion 18f, an L-shaped spring supporting portion 18g and the like are formed. Further, on the back side of the connecting portion 18a, a concave portion 18h having an open lower surface, a pair of supporting portions 18i facing each other with a gap in the concave portion 18h, and a rib inclined inward from the opening end of the concave portion 18h. Shaped guide portion 18j
Are formed, and the screw hole 1 is formed in one supporting portion 18i.
8k and a positioning pin 18l are provided. Both of the supporting portions 18i are in substantially the same plane to form a mounting reference surface, and a follower spring 22 shown by a chain double-dashed line is fixed between the supporting portions 18i.

When mounting the follower spring 22, as shown in FIG. 28, first, with the carriage 18 inverted, the follower spring 22 is dropped from the back side of the connecting portion 18a onto both the supporting portions 18i. The positioning hole 22a of the follower spring 22 is inserted into the positioning pin 18l. Then, screw 23 into the through hole 2 of the follower spring 22.
2b is inserted into the screw hole 18k, and the screw 23 is tightened.
8 is attached and fixed to the rear surface of the connecting portion 18a. At this time, since the guide portion 18j is formed at the opening end of the recess 18h, the follower spring 22 is surely dropped along the guide portion 18j onto both the support portions 18i, and the follower spring 22 is formed.
Can be installed easily. Also, the follower spring 2
Since a gap is defined between both support portions 18i which are the mounting reference surfaces of No. 2, the flatness of both support portions 18i is greatly changed due to sink marks (molding distortion) when the carriage 18 is molded with a plastic material. Not only can this be prevented, but the weight of the carriage 18 can be reduced and the number of materials can be reduced.

22 to 27, the carriage 1 will be described.
A through hole 18m is formed on one side of the carriage 8. By inserting the through hole 18m into the guide shaft 24 fixed to the chassis 10, the carriage 18 is guided in the front-back direction of the chassis 10. There is. An L-shaped arm 18n is formed on the other side of the carriage 18, and the L-shaped arm 18n passes above the screw shaft 25 and is composed of a photo interrupter or the like arranged on the chassis 10. It has reached part 26. A convex portion 18o is engraved on the back surface of the L-shaped arm 18n, and the convex portion 18o is engaged with the screw shaft 25 by the elastic force of the follower spring 22. The screw shaft 25 is a standing wall 10b at the rear of the chassis 10.
Is a rotating shaft of a stepping motor 27 attached to the chassis 10. The tip of the screw shaft 25 is pivotally supported by the supporting wall 10h of the chassis 10. Therefore, when the screw shaft 25 rotates using the stepping motor 27 as a drive source, the rotation of the screw shaft 25 is transmitted to the carriage 18 via the convex portion 18o, and the carriage 18 moves in the front-back direction of the chassis 10, that is, the magnetic disk. 8 is moved in the radial direction. Further, at that time, when the tip of the L-shaped arm 18n crosses the detection unit 26, a zero track signal is output.

As shown in FIGS. 29 to 31, a mounting base 18p is formed at the center of the front end of the carriage 18, and the periphery of the mounting base 18p is a recess 18q. An adhesive filling groove 18r extending in the longitudinal direction of the carriage 18 and an adhesive filling groove 18r on the upper surface of the mount 18p.
Escape grooves 18s facing each other are formed, and through holes 18t are formed on both sides of the mounting base 18p. The lower magnetic head 2 is mounted on the mount 18p.
0 is mounted, and the lower magnetic head 20 is attached to the mount 18p by the adhesive 28 filled in the adhesive filling groove 18r.
It is fixed to. At this time, the circular large-diameter portion formed at one end of the adhesive filling groove 18r is located outside the lower magnetic head 20, and the adhesive 2 injected from this large-diameter portion.
8 is reliably filled between the lower magnetic head 20 and the mount 18p through the adhesive filling groove 18r. Further, since the adhesive filling groove 18r extends along the center of the lower surface of the lower magnetic head 20, the lower magnetic head 20 is bonded and fixed to the mount 18p with good balance. Further, although the lower magnetic head 20 has a thin core portion 20a and a thick core portion 20b, the thin core portion 20a having lower rigidity than the thick core portion 20b straddles the adhesive filling groove 18r. Thus, the surplus adhesive 28 that is located on both the escape grooves 18s and flows out from the adhesive filling groove 18r through the lower surface of the lower magnetic head 20 is stored in the escape grooves 18s.
As a result, the contact area between the thin core portion 20a and the mounting base 18p is reduced, so that the thin core portion 20a is prevented from being damaged by the curing of the adhesive 28.

After the lower magnetic head 20 is fixed to the mount 18p with the adhesive 28, an adhesive 29 such as UV resin is applied to the periphery of the lower magnetic head 20 if necessary, so that the lower magnetic head 20 The head 20 is more reliably fixed to the mount 18p (see FIG. 30). The lower magnetic head 20 that is adhesively fixed on the mount 18p of the carriage 18 in this manner is an FPC (flexible printed circuit board) 30.
, And the FPC 30 is guided to the printed circuit board described later through the recess 18q.

As shown in FIG. 32, a spring receiving portion 19a is formed on the upper surface of the hold case 19, and first and second supporting arms 19b and 19c are formed on both sides of the spring receiving portion 19a. There is. The lower surface of the first support arm 19b is at a lower position than the lower surface of the second support arm 19c, and in the case of the present embodiment, by forming the tip end of the first support arm 19b downward in an L-shape, The tip end of the first support arm 19b projects downward from the second support arm 19c. A leaf hinge spring 31 made of an elastic metal plate is provided at the rear end of the hold case 19, and the hold case 19 and the leaf hinge spring 31 are integrated by outsert molding. Further, the upper magnetic head 21 is fixed to the tip of the hold case 19 via a gimbal spring.
Is also guided to a printed circuit board described later through an FPC (not shown).

The hold case 19 constructed in this way
22 and 23, after the leaf hinge spring 31 and the mounting plate 32 are placed on the connecting portion 18a of the carriage 18 in an overlapping manner, the set screw 33 is attached from above to the screw hole of the connecting portion 18a. By being screwed into 18c, it is hinged on the connecting portion 18a of the carriage 18. At that time, as shown in FIG. 26, by inserting one side edge of the leaf hinge spring 31 into the notch 18u formed in the base of the spring supporting portion 18g of the carriage 18 and placing it on the connecting portion 18a, One side edge of the leaf hinge spring 31 is pressed by the spring support portion 18g. In this state,
After the hold case 19 is slightly rotated against the tightening force of the set screw 33 to adjust the alignment of the lower magnetic head 20 and the upper magnetic head 21, the circular groove 1 of the carriage 18 is adjusted.
By filling 8b with the adhesive 34, the leaf hinge spring 31 is temporarily fixed to the connecting portion 18a. In this case, as shown in FIGS. 33 and 34, since the leaf hinge spring 31 is placed on the connecting portion 18a so as to cover the circular groove 18b by almost half, the adhesive 34 is applied from the exposed portion of the circular groove 18b.
Can be easily filled between the carriage 18 and the leaf hinge spring 31. In addition, the leaf hinge spring 31
Since the notch 32a is formed in the mounting plate 32, the excess adhesive 34 is stored in the notch 32a, and the adhesive 34 is prevented from undesirably protruding. After the temporary fixing is completed, the set screw 33 is strongly tightened to be permanently fixed.
Since it is temporarily fixed to the connecting portion 18a by 4, the alignment between the lower magnetic head 20 and the upper magnetic head 21 is maintained.

The mounting plate 32 is formed by press-pressing a metal flat plate, and burrs are generated on one surface of the mounting plate 32 during the press-pressing. The heights of the burrs are not uniform, and if the mounting plate 32 is placed on the connecting portion 18a of the carriage 18 with the surface on which the burrs are generated facing back, the tightening force of the set screw 33 will be the leaf hinge spring. 31 does not act uniformly. Therefore, in this embodiment,
As shown in FIG. 22, a cut-off portion 32c is formed at one corner of the mounting plate 32, and the regulating projection 18d of the carriage 18 is positioned in the cut-off portion 32c.
The mounting plate 32 is directional. Therefore, when the mounting plate 32 is placed on the connecting portion 18a of the carriage 18, the burr is always directed upward, and the mounting plate 32 cannot be assembled in the carriage 18 in the inverted state.

Returning to FIG. 22, the winding portion of the load spring 35 is inserted in the spring support portion 18g of the carriage 18, and both free ends of the load spring 35 are hooked on the spring receiving portions 18f and 19a, respectively. When stopped, the hold case 19 is elastically biased toward the carriage 18. The load spring 35 is a torsion coil spring, and the lengths l ₁ and l ₂ from the wound portion to both free ends are set to be substantially equal. Therefore, when incorporating the load spring 35, it is not necessary to pay attention to the direction thereof, and workability is improved. The hold case 19 is located in the long hole 12c of the holder 12, and of the two support arms 19b and 19c provided in the hold case 19, the first support arm 19b is the elastic spring of the load spring 35. It receives the force and contacts the bulging portion 12b of the holder 12, and a predetermined clearance is secured between the second support arm 19c and the bulging portion 12b.
At that time, since the second support arm 19c is formed at a position far from the leaf hinge spring 31 with respect to the first support arm 19b, the clearance required between the second support arm 19c and the bulging portion 12b is secured. In addition, the thickness dimension of the second support arm 19c can be increased as much as possible. Further, the first support arm 19b abuts the bulging portion 12b of the holder 12 almost directly above the guide shaft 24, and the head transfer mechanism 17 is elastically supported by the follower spring 22 at a position apart from the guide shaft 24. Therefore, even if the follower spring 22 having a small spring force is used, the head transfer mechanism 17 including the carriage 18 can be prevented from rising.

FIG. 35 is a view of the chassis as seen from the back side. As shown in FIG. 35, the sub chassis 36 and the printed circuit board 37 are fixed to the lower surface of the chassis 10. A spindle motor 38 is provided on the sub chassis 36.
Is mounted (see FIG. 9), and the spindle motor 38 is electrically connected to the printed board 37 via a control board and an FPC. Circuit elements including driving circuit elements such as the stepping motor 27 and the spindle motor 38 are mounted on the printed circuit board 37, and as shown in FIG. 9, two connectors 39,
40 is attached. These connectors 39 and 40 are male connectors having a plurality of connection pins 39a and 40a, and by inserting a female connector 41 of an external device indicated by a two-dot chain line into these connectors 39 and 40, the magnetic recording / reproducing apparatus can be used as an external device. It is designed to be connected to.

FIG. 36 is a plan view of the upper cover, FIG. 37 is a rear view of the upper cover, FIG. 38 is a side view of the upper cover, FIG. 39 is a plan view of the lower cover, and FIG. 40 is a view of the lower cover. A rear view and FIG. 41 are side views of the lower cover.

As shown in FIGS. 36 to 38, the upper cover 1 includes a flat top surface 2a, a pair of side surfaces 1b extending from both side edges of the top surface 1a, and a rear surface extending from the rear end of the top surface 1a. 1c, and the side surface 1b and the back surface 1c are the top surface 1
It is bent at a right angle to a. A through hole 1d is formed in the back surface 1c, two L-shaped leg pieces 1e are formed at the lower end of one side surface 1b, and an L-shaped leg piece 1e is formed at the lower end of the other side surface 1b.
One leg piece 1e having a character shape and one hanging piece 1f having a rectangular shape are formed. The formation positions of the leg pieces 1e and the hanging pieces 1f are deviated from each other in the front-back direction of the upper cover 1. Therefore, when a large number of the upper covers 1 are taken from the base material of the metal flat plate, the arbitrary upper covers 1e are formed. By arranging the leg piece 1e and the hanging piece 1f formed in the above between the both leg pieces 1e formed in another upper cover 1 or between the leg piece 1e and the hanging piece 1f,
The scrap generated from the base material can be reduced as much as possible.

As shown in FIGS. 39 to 41, the lower cover 2 has a flat bottom surface 2a, a pair of side surfaces 2b standing up from both side edges of the bottom surface 2a, and a back surface 2c standing up from the rear end of the bottom surface 2a. The side surface 2b and the back surface 2c have a bottom surface 2
It is bent at a right angle to a. The height dimension of the back surface 2c is set to be sufficiently small with respect to each side surface 2b, and a pair of restriction walls 2d are projectingly provided at the upper end of the back surface 2c. Two locking pieces 2e are formed on one side surface 2b, and one locking piece 2e and a through hole 2f are formed on the other side surface 2b.
And a bent piece 2g having The locking pieces 2e are formed by bending the side surface 2b inward at a substantially right angle along a vertical line. Further, each side surface 2b is formed with four sets of a support piece 2h and a stop piece 2i facing each other through an opening, two sets on each side, two sets on each side. The support piece 2h and the stop piece 2i in each set are vertically displaced from each other, and the lower end of the stop piece 2i is inclined upward. The stopper piece 2i is in a state of being pressed, but the supporting piece 2h is bent at a substantially right angle inwardly of the side surface 2b along a vertical line after the pressing.

After the mechanism body is fixed to the lower cover 2 thus constructed, the lower cover 2 is covered with the upper cover 1 and the two 1 and 2 are joined and integrated with each other. A housing of the magnetic recording / reproducing device is formed. In this case, as shown in FIG. 42, first, the chassis 10 of the mechanism main body that has been assembled is inserted into the lower cover 2 and placed on each support piece 2h, and then each stop piece 2i.
Is bent inwardly of the side surface 2b at a substantially right angle, and the chassis 10 is held by each set of the stop piece 2i and the support piece 2h. Figure 6
8 shows this state, and as is clear from these figures, the restriction wall 2d of the lower cover 2 is located on the side of the connectors 39, 40 mounted on the printed circuit board 37. Therefore, when the female connector 41 of the external device is inserted into these connectors 39, 40, the lateral displacement of the female connector 41 is regulated by the regulation wall 2d, and the female connector 4
1 can be easily inserted into the connectors 39 and 40.

Next, as shown in FIG. 43 (a), the both side surfaces 1b of the upper cover 1 are inserted inside the both side surfaces 2b of the lower cover 2, and the upper cover 1 is moved in the rear end direction (arrow direction). 43), the corresponding locking pieces 2e of the lower cover 2 are inserted between the lower end of the side surface 1b of the upper cover 1 and the tips of the leg pieces 1e, as shown in FIG. Are joined to the lower cover 2. In this case, since the leg piece 1e and the engagement piece 2e that is engaged therewith are the base materials of the upper cover 1 and the lower cover 2 that have been stamped out, high dimensional accuracy is ensured for both, and therefore, Regardless of the bending angle of each locking piece 2e, each leg piece 1e has a corresponding locking piece 2e.
Securely locked to e. Further, since the opening formed when the locking piece 2e is pressed out is closed by the leg piece 1e, dustproofness and magnetic shielding are achieved. Then, as shown in FIG. 44, the screws 42 are attached to the upper cover 1 and the lower cover 2.
Through the through holes 1d, 2f of the chassis 10
When screwed into j, the mechanism body including the chassis 10 and the three members of the lower cover 2 and the upper cover 1 are joined and integrated with each other.

The magnetic recording / reproducing apparatus according to this embodiment is constructed as described above, and its operation will be described below.

When the disc cartridge 6 is not mounted, the rotating member 14 is elastically biased by the torsion coil spring 16 and is in the position shown in FIG.
The slide plate 11 is kept in the retracted position by engaging the locking claws 11c of the slide plate 11 with 4h. In this case, as shown in FIG. 45, each protrusion 12h of the holder 12
Is locked to the upper end of each cam groove 11e of the slide plate 11,
The holder 12 is kept in the raised position.

When the disc cartridge 6 is inserted into the front plate 3 through the insertion opening 3a, the disc cartridge 6
Although the door 5 is rotated by this, excessive rotation of the door 5 is restricted by abutting against the stopper projection piece 12g of the holder 12. Insert the disk cartridge 6 further,
When the shutter opening / closing pin 14g of the rotating member 14 is abutted through the space between the upper surface of the holder 12 and the support piece 12a, the bent portion 16a of the torsion coil spring 16 is inserted by mistake during the insertion. It is escaped to the outside by the prevention portion 7a.
When the disc cartridge 6 is inserted upside down by mistake, the tip of the cartridge case 7 is bent at the bent portion 16.
Since the disk cartridge 6 comes into contact with a, the disk cartridge 6 cannot be inserted any further.

Further, when the disc cartridge 6 is inserted inside, as shown in FIG. 47, the rotating member 14 rotates in the clockwise direction of FIG. 6 against the elastic force of the torsion coil spring 16, and the disc is rotated. The tip portion of the cartridge 6 enters between the carriage 18 of the head transfer mechanism 17 and the hold case 19. With the rotation of the rotating member 14, the shutter opening / closing pin 14g is inserted into the through hole 12d of the holder 12.
Since the inside is rotated, the shutter 9 is moved by the shutter opening / closing pin 14g, and the magnetic disk 8 in the cartridge case 7 is exposed through the opening 7b and the window hole 9a. Also,
As the rotation member 14 rotates, the locking claws 14h and the locking claws 11c are released, so that the slide plate 11 is moved to the forward position by the tension spring 13 and fixed to the mounting plate 11c of the slide plate 11. The eject button 4 thus pushed protrudes from the front plate 3. As a result, as shown in FIG.
Each protrusion 12h of the holder 12 moves to the lower end of each cam groove 11e of the slide plate 11, and the holder 12 moves to the lowered position, that is, the loading position together with the disc cartridge 6. Further, since the first support arm 19b is in contact with the bulging portion 12b of the holder 12, the hold case 19 urged by the load spring 35 also descends as the holder 12 descends, and the lower side of the carriage 18 side. Magnetic head 20
The upper magnetic head 21 on the side of the hold case 19 contacts the magnetic disk 8 respectively. Here, only the first support arm 19b comes into contact with the bulging portion 12b of the holder 12, and the reaction force thereof acts on the leaf hinge spring 31 as a torsion moment. Since one side edge of 31 is pressed by the notch 18u of the spring support portion 18g, the deformation of the leaf hinge spring 31 is prevented. If a large external force is applied due to a drop or the like, the second support arm 19c of the hold case 19 hits the bulging portion 12b of the holder 12, so that the magnetic heads 20 and 21 do not collide and are damaged. It is like this.

After the disk cartridge 6 has been moved to the loading position in this way, the stepping motor 27 is driven to rotate the screw shaft 25, and the screw shaft 25 rotates to the carriage 18 via the screw portion 18o. The head transfer mechanism 17 is transmitted.
Moves in the radial direction of the magnetic disk 8 along the guide shaft 24. The magnetic disk 8 is rotated by driving the spindle motor 38,
With respect to the lower magnetic head 20 and the upper magnetic head 21
Recording / playback of information is performed from.

When the disc cartridge 6 at the loading position is to be ejected, the eject button 4 projecting from the front plate 3 is pressed to move the slide plate 11 to the retracted position against the elastic force of the tension spring 13. . Then,
The holder 12 rises from the loading position shown in FIG. 46 to the unloading position shown in FIG. 45, and the rotation member 14 that rotates counterclockwise in FIG. At the same time as being discharged, the lock claw 14h of the rotating member 14 is locked to the locking claw 11c of the slide plate 11, whereby the slide plate 11 is kept in the retracted position again.

In the above embodiment, a plurality of protrusions 10e are bulged on the bottom surface of the chassis 10 and the lower surface of the slide plate 11 is slid along the upper surface of each protrusion 10e. On the contrary, a plurality of protrusions may be bulged on the lower surface of the slide plate 11, and the lower surfaces of these protrusions may be slid on the flat upper surface of the chassis 10. It is also possible to bulge the protrusions on each of the bottom surfaces of the chassis 10.

[0042]

As described above, according to the present invention,
Adjust the vertical and horizontal movement of the slide plate on the chassis.
The guide plate to control the slide plate
It can be moved only to the chassis and slide plate
Either or both of the
To form a protrusion with a predetermined height and use this protrusion as a sliding surface.
Slide plate moves back and forth on the chassis in the front-back direction.
Since it is configured like this, the height and smoothness of the protrusion are accurately formed.
The slide plate in the front-back direction with respect to the chassis.
Mini can smoothly move to Rukoto. Further, when the protrusion is formed in the vicinity of the guide protrusion integrally formed on the chassis within 10 mm, the protrusion serving as the sliding surface of the slide plate moves the slide plate in the vertical and horizontal directions. Since the slide plate is located in the vicinity of the regulating guide protrusion, the play of the slide plate is reduced and the slide plate can be moved more smoothly with respect to the chassis. Furthermore, if the same kind of plating is applied to the surface of the chassis and slide plate,
Since the zinc plating is in sliding contact, the slide plate can be moved more smoothly with respect to the chassis also from this point.

[Brief description of drawings]

FIG. 1 is a plan view of a magnetic recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of the magnetic recording / reproducing apparatus.

FIG. 3 is a rear view of the magnetic recording / reproducing apparatus.

FIG. 4 is a side view of the magnetic recording / reproducing apparatus.

FIG. 5 is a plan view of a disc cartridge.

FIG. 6 is a plan view showing an upper cover removed from FIG.

FIG. 7 is a rear view thereof.

FIG. 8 is a side view thereof.

9 is a plan view showing a holder removed from FIG. 6. FIG.

FIG. 10 is a plan view of a chassis included in the magnetic recording / reproducing apparatus.

FIG. 11 is a side view of the chassis.

FIG. 12 is a perspective view showing a guide protrusion and a protrusion of the chassis.

FIG. 13 is a plan view of a slide plate included in the magnetic recording / reproducing apparatus.

FIG. 14 is a rear view of the slide plate.

FIG. 15 is a side view of the slide plate.

FIG. 16 is a cross-sectional view showing an engaged state of the slide plate and the chassis.

FIG. 17 is a plan view of a holder provided in the magnetic recording / reproducing apparatus.

FIG. 18 is a rear view of the holder.

FIG. 19 is a side view of the holder.

FIG. 20 is an explanatory diagram showing a state where the holder is trimmed from the base material.

FIG. 21 is a perspective view showing a main part of a shutter opening / closing mechanism included in the magnetic recording / reproducing apparatus.

FIG. 22 is a plan view of a head transfer mechanism provided in the magnetic recording / reproducing apparatus.

FIG. 23 is a sectional view of the head transfer mechanism.

FIG. 24 is a plan view of a carriage provided in the head transfer mechanism.

FIG. 25 is a rear view of the carriage.

FIG. 26 is a rear view of the carriage.

27 is a cross-sectional view taken along the line AA of FIG.

FIG. 28 is an explanatory diagram showing a state in which a follower spring is attached to the carriage.

FIG. 29 is a perspective view showing a head mounting portion of the carriage.

FIG. 30 is a cross-sectional view of an attached state of the carriage and the lower magnetic head as seen from the longitudinal direction.

FIG. 31 is a cross-sectional view seen from the lateral direction.

FIG. 32 is a plan view of a hold case provided in the head transfer mechanism.

FIG. 33 is a plan view of relevant parts showing a mounting portion of the hold case and the carriage.

34 is a sectional view taken along the line BB of FIG.

35 is a view of the chassis shown in FIG. 10 viewed from the back side.

FIG. 36 is a plan view of an upper cover included in the magnetic recording / reproducing apparatus.

FIG. 37 is a rear view of the upper cover.

FIG. 38 is a side view of the upper cover.

FIG. 39 is a plan view of a lower cover provided in the magnetic recording / reproducing apparatus.

FIG. 40 is a rear view of the lower cover.

FIG. 41 is a side view of the lower cover.

FIG. 42 is an explanatory view showing a fixed relationship between the lower cover and the chassis.

FIG. 43 is an explanatory diagram showing a process of assembling the upper cover and the lower cover.

FIG. 44 is a main-portion cross-sectional view showing a fixed portion of the upper cover, the lower cover, and the chassis.

FIG. 45 is an explanatory diagram showing the relationship between the holder and the slide plate during unloading.

FIG. 46 is an explanatory diagram showing the relationship between the holder and the slide plate at the time of loading.

47 is a plan view showing the loading state of FIG. 6. FIG.

FIG. 48 is an exploded perspective view showing a conventional example of a guide mechanism for a slide plate and a chassis.

FIG. 49 is an explanatory diagram showing an assembled state of the guide mechanism.

[Explanation of symbols]

1 Top cover 1e leg piece 2 Lower cover 2e Locking piece 2h support piece 2i stop 5 doors 6 disk cartridge 7 cartridge case 7a Incorrect insertion prevention unit 8 magnetic disks 9 shutters 10 chassis 10d guide protrusion 10e protrusion 11 slide plate 11c locking claw 11d guide hole 11e Cam groove 12 holder 12c long hole 12f locking hole 12g stopper protrusion 12h protrusion 13 Extension spring 14 Rotating member 14a Shaft 14b, 14c arm 14d, 14e Support wall 14f slit 14g Shutter open / close pin 14h lock claw 16 torsion coil spring 16a Bent section 17 Head transfer mechanism 18 carriage 18a connection part 18b circular groove 18c, 18k screw holes 18d Control protrusion 18e, 18l Positioning pin 18f Spring receiving part 18g spring support 18h recess 18i support 18j Guide part 18p mount 18q hollow 18r Adhesive filling groove 18s escape groove 18u notch 19 hold case 19a Spring receiving part 19b First support arm 19c Second support arm 20 Lower magnetic head 20a thin core 20b thick core 21 Upper magnetic head 22 Follower spring 23 screws 24 Guide shaft 25 screw shaft 27 Stepping motor 28 Adhesive 31 leaf hinge spring 32 mounting plate 32a cutout 32c Cut-off part 33 Set screw 34 Adhesive 35 Road Spring 37 Printed circuit board 39, 40 connector 41 female connector 42 screws

Claims (3)

(57) [Claims] 1. A chassis made of a metal plate material, a slide plate made of a metal plate material mounted on the chassis so as to be able to move back and forth, and the chassis which cooperates with the slide plate.
And a holder that moves up and down between an unloading position and a loading position together with a disk cartridge that moves only in the vertical direction with respect to the chassis, and is stored in the chassis. integrally formed with the slide guide projections for restricting the movement of the left-right direction
While allowing the plate to move only in the front-back direction, a protrusion having a predetermined height is formed by bulging on the facing surface of one or both of the chassis and the slide plate,
With this protrusion as a sliding surface, the slide plate is attached to the chassis.
A magnetic recording / reproducing apparatus, characterized in that the magnetic recording / reproducing apparatus is configured to reciprocate in the front-rear direction. 2. The magnetic recording / reproducing apparatus according to claim 1, wherein the protrusion is formed within 10 mm of the guide protrusion. 3. The magnetic recording / reproducing apparatus according to claim 1, wherein the surfaces of the chassis and the slide plate are plated with the same type of zinc .