JPH0982003A - Magnetic recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a magnetic recording/reproducing device which is suited for reducing the cost by reducing scrap when punching a holder from a base material. SOLUTION: A door which is energized by a spring in the direction for blocking the insertion port of a disk cartridge is supported on the reverse side of a front surface plate which is installed on the front surface of the device and a stopper protruding piece 12g for regulating the excessive rotation of the door is formed at the front edge of a holder 12 provided in the rear of a front surface plate 3. A long hole 12c for guiding a head transfer mechanism is formed at the rear edge of a holder 12 and a width dimension W1 of the above stopper protruding piece 12g is set to a width dimension W2 or less of the long hole 12c. Then, when punching a number of holders 12 from a base material, the stopper protruding piece 12g of the arbitrary holder 12 is positioned in the long hole 12c of another holder 12, thus reducing scrap generated from the base material.

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 stopper structure for restricting an opening angle of a door provided at an insertion opening of a disk cartridge.

[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, the disk cartridge is inserted / ejected from an insertion opening formed on the front surface of the apparatus. Therefore, a door is required to close the insertion slot when the disc cartridge is not installed.

Conventionally, in such a magnetic recording / reproducing apparatus, a front plate having an insertion opening is installed in front of a holder, and a door is pivotally supported on the back surface of the front plate so as to be openable and closable. It is known that the coil spring urges the insertion port in the closing direction. In such a known magnetic recording / reproducing apparatus, when the disc cartridge is inserted into the inside from the insertion opening, the door is rotated in the opening direction by the disc cartridge, and the holder holds the disc cartridge from the unloading position to the loading position. And move. On the other hand, when the eject button is pressed, the holder moves together with the disc cartridge from the loading position to the unloading position, the disc cartridge is ejected from the insertion opening to the outside, and the door is twisted by the coil spring to open the insertion opening. It is rotated in the closing direction. Therefore, when the disc cartridge is not mounted, the insertion port is always closed by the door so that foreign matter such as dust does not enter the inside through the insertion port.

[0004]

By the way, in the above-mentioned conventional magnetic recording / reproducing apparatus, when the disk cartridge is vigorously inserted into the insertion slot, the force causes the door to excessively rotate, and the torsion coil is twisted. The spring may be deformed or damaged. Therefore, in recent years, a stopper structure has been proposed in which a stopper projecting piece that can come into contact with the door is projectingly formed at the front end of the holder, and the opening angle of the door is regulated by this stopper projecting piece. However, when the stopper protrusion is formed on the front end of the holder in this way, the planar shape of the holder is partially convex, so that when the holder is pressed out of the metal flat plate (base material), it is generated from the base material. There was a problem that the amount of scrap would increase. In particular, when a large number of holders are sequentially stamped out of a long base material, it is necessary to separate each holder by at least the length of the stopper projection piece, so the entire circumference of the stopper projection piece becomes scrap and The amount of waste was increased, which hindered cost reduction.

The present invention has been made in view of the circumstances of the prior art as described above, and its purpose is to reduce the scrap amount when the holder is pressed out of the base material and reduce the cost of magnetic recording. It is to provide a reproducing apparatus.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a slide plate mounted on a chassis so as to be able to move forward and backward, and a disc cartridge unloading position in cooperation with the forward and backward movement of the slide plate. And a loading position, a holder which moves up and down, a front plate which is arranged in front of the holder and which has an insertion opening for the disc cartridge, and which is rotatably rotatably supported by the front plate and which holds the insertion opening by a spring. A door urged in a closing direction and a head transfer mechanism reciprocating in the radial direction of the magnetic disk along a long hole formed at the rear end of the holder are provided, and the door of the door is provided at the front end of the holder. This is achieved by forming a stopper projection piece that restricts the opening angle so as to project, and setting the width dimension of this stopper projection piece to be less than or equal to the width dimension of the elongated hole.

[0007]

According to the present invention, the stopper projection for restricting the opening angle of the door is formed at the front end of the holder so that the width of the stopper projection is a concave long hole formed at the rear end of the holder. Is set to be less than or equal to the width dimension of. Therefore, when a large number of holders are pressed out of the base material, the stopper protruding piece of any holder is placed in the elongated hole of another adjacent holder, so that the pressed-out portion of the elongated hole that is originally discarded as scrap. Can be used as a stopper protrusion of another holder, and the waste of material can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment 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 is composed of 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 torsion coil spring (not shown) in a direction to close 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 formed by bending at right angles to the bottom surface.
Two on each side of 0, and four on both sides. A plurality of protrusions 10e are formed on the bottom surface of the chassis 10 so as to protrude upward, and these protrusions 10e are arranged in the vicinity of each guide protrusion 10d, preferably within 10 mm. Each protrusion 10e is formed by pressing the chassis 10 in the plate thickness direction. Since the chassis 10 is galvanized in advance as described above, the surface of each protrusion 10e is galvanized. Will have a flat surface. In addition, a plurality of reinforcing ribs 10f are formed on the bottom surface of the chassis 10 and face the two stopper projections 10g defining the lowered position of the disk cartridge 6 and the rear standing wall 10b with a predetermined space. The supporting wall 10h and the like are bent and formed. 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, FIG.
As shown in FIG. 6, the lower surface of the slide plate 11 is the chassis 10
The upper surface of each of the protrusions 10e formed on the slide plate 11 is slid, and the lower surface of the slide plate 11 and the upper surface of the protrusion 10e are both galvanized.
It can be slid smoothly against.

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. A bulged portion 12b that bulges slightly upward is formed on the upper surface of the holder 12, and a bulged portion 12b is provided with an elongated hole 12c having a concave shape in plan view extending toward the rear end and an arc-shaped escape hole 12d. Has been formed. A retaining protrusion 12e is formed in the vicinity of the bulging portion 12b by bending, and a locking hole 12f is formed. Also, the holder 12
A stopper projection piece 12g having a convex shape in a plan view is formed at the front end of the upper surface, and the width dimension W1 of the stopper projection piece 12g is set to be equal to or smaller than the width dimension W2 of the elongated hole 12c (W1 ≦ W2). Further, on the side surface of the holder 12, four protrusions 12h are formed on each of the left and right sides, two on each side, and a hanging piece 12i extending downward is formed.

As shown in FIG. 20, the holder 12 has a plate-shaped base material (zinc-plated iron plate) whose outer shape is punched out, and is then subjected to bending work or the like.
It is formed into a shape as described above. Since the relationship between the width dimension W1 of the stopper projection piece 12g and the width dimension W2 of the elongated hole 12c is set to W1 ≦ W2 when the outer shape is removed, the stopper projection piece 12g formed on any holder 12 is formed.
Is located in the long hole 12c formed in another adjacent holder 12, scraps generated from the base material can be minimized. That is, the concave long hole 12
The convex portion remaining in the base material when the outer shape of c is removed is originally discarded as scrap, but since this portion can be used as the stopper protrusion 12g of another holder 12,
The waste of the base 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 recessed portion 18h having an open lower surface, a pair of support portions 18i facing each other through the recessed portion 18h, and a guide portion 18j inclined toward the recessed portion 18h are formed. The one support portion 18i is provided with a screw hole 18k and a positioning pin 18l. The lower surfaces of both the supporting portions 18i form substantially the same plane, 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 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.

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, through holes 18t are formed on both sides of the mounting base 18p, and one end of the adhesive filling groove 18r has a larger width dimension than other portions. It is a circular wide part. The lower magnetic head 20 is placed on the mounting base 18p configured in this manner, and the lower magnetic head 20 is attached to the adhesive filling groove 18r.
It is fixed to the mount 18p by the adhesive 28 filled in. At this time, the circular wide portion formed at one end of the adhesive filling groove 18r is located outside the lower magnetic head 20, and the adhesive 28 injected from this wide portion is filled in the adhesive filling groove 18r. Through the lower magnetic head 20 and the mounting base 1
It is reliably filled with 8p. Also, the adhesive filling groove 1
Since 8r 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 mounting base 18p in good balance. Further, the lower magnetic head 2
0 has a thin-walled core portion 20a and a thick-walled core portion 20b, but the thin-walled core portion 20a having a lower rigidity than the thick-walled core portion 20b straddles the adhesive filling groove 18r and has both escape grooves 18s.
The magnetic head 2 located above the lower magnetic head 2 from the adhesive filling groove 18r.
The surplus adhesive 28 flowing out through the lower surface of 0 is stored in these 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 tightly tightened to be permanently fixed. In this case, the leaf hinge spring 31 is fixed to the adhesive 3
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. Lower cover 2
The depth dimension of the bottom surface 2a is set larger than the depth dimension of the top surface 2a of the upper cover 1, and the material of the upper cover 1 is reduced and the weight thereof is reduced by the short dimension. Further, 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 bending piece 2g having a through hole 2f are formed on the other side surface 2b. The locking pieces 2e are formed by bending the side surface 2b inward at a substantially right angle along a vertical line. In addition, a support piece 2h and a stop piece 2i that face each other through an opening are provided on each side surface 2b.
4 sets are formed on each of the left and right sides, 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.

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.

1 to 4 show this state,
As is apparent from these drawings, most of the mechanism main body is covered by the upper and lower covers 1 and 2, but the connectors 39 and 40 mounted on the printed circuit board 37 and the stepping mounted on the standing wall 10b of the chassis 10 are covered. The motor 26 is exposed outward from the rear end of the upper cover 1 and is located in the open portion above the rear end of the lower cover 2. Also,
As described above, the two restriction walls 2d formed on the back surface 2c of the lower cover 2 are located on the sides of the respective connectors 39, 40.
Therefore, when the female connector 41 of the external device is inserted into these connectors 39, 40, the female connector 41 is inserted into the restriction wall 2
The lateral displacement is restricted by d, and the female connector 41 can be easily inserted into the connectors 39 and 40. Further, when it becomes necessary to adjust the mounting position of the stepping motor 26, this adjustment work can be performed using a wide space above the stepping motor 26.

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

When the disk 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 into the inside, the rotating member 14 rotates in the clockwise direction in FIG. 6 against the elastic force of the torsion coil spring 16, as shown in FIG. 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, which causes the rotation of the screw shaft 25 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 ejecting the disk cartridge 6 at the loading position, the eject button 4 projecting from the front plate 3 is pressed to move the slide plate 11 against the elastic force of the tension spring 13 to the retracted position. . 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.

[0042]

As described above, according to the present invention,
Since a stopper protrusion that restricts the opening angle of the door is formed at the front end of the holder and the width of this stopper protrusion is set to be less than or equal to the width of the concave long hole formed at the rear end of the holder, When pressing many holders from the base material,
By locating the stopper protrusion of any holder in the elongated hole of another adjacent holder, the press punched portion of the elongated hole that is originally discarded as scrap can be used as the stopper protrusion of another holder. . Therefore, it is possible to reduce the scrap amount of the holder generated from the base material and provide an inexpensive magnetic recording / reproducing apparatus.

[Brief description of drawings]

FIG. 1 is a plan view of a magnetic recording / reproducing apparatus according to one 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.

[Explanation of symbols]

 1 Upper Cover 1e Leg Piece 2 Lower Cover 2e Locking Piece 2h Supporting Piece 2i Stopping Piece 5 Door 6 Disk Cartridge 7 Cartridge Case 7a Incorrect Insertion Prevention Section 8 Magnetic Disk 9 Shutter 10 Chassis 10d Guide Protrusion 10e Projection 11 Sliding Plate 11c Engagement Stopper 11d Guide hole 11e Cam groove 12 Holder 12c Long hole 12f Locking hole 12g Stopper protrusion 12h Projection 13 Extension spring 14 Rotating member 14a Shaft part 14b, 14c Arm part 14d, 14e Support wall 14f Slit 14g Shutter opening / closing pin 14h Lock claw 16 Torsion coil spring 16a Bending portion 17 Head transfer mechanism 18 Carriage 18a Connecting portion 18b Circular groove 18c, 18k Screw hole 18d Restricting protrusions 18e, 18l Positioning pin 18f Spring receiving portion 18g Spring supporting portion 18h Recessing portion 1 8i Supporting part 18j Guide part 18p Mounting base 18q Recessed part 18r Adhesive filling groove 18s Escape groove 18u Notch 19 Hold case 19a Spring receiving part 19b First supporting arm 19c Second supporting arm 20 Lower magnetic head 20a Thin core part 20b Thickness Meat core 21 Upper magnetic head 22 Follower spring 23 Screw 24 Guide shaft 25 Screw shaft 27 Stepping motor 28 Adhesive 31 Leaf hinge spring 32 Mounting plate 32a Notch 32c Cut-off part 33 Set screw 34 Adhesive 35 Load spring 37 Printed circuit board 39 , 40 connector 41 female connector 42 screw

Claims (1)

[Claims] 1. A slide plate mounted on a chassis so as to be able to move forward and backward, and a holder for moving the disc cartridge up and down between an unloading position and a loading position in cooperation with the forward and backward movement of the slide plate. A front plate disposed in front of the holder and having an insertion port for the disk cartridge, and a door rotatably supported by the front plate and urged in a direction to close the insertion port by a spring,
A head transfer mechanism that reciprocates in the radial direction of the magnetic disk along a long hole formed at the rear end of the holder, and a stopper protrusion that restricts the opening angle of the door is formed at the front end of the holder. The width of the stopper protrusion is set to be equal to or smaller than the width of the elongated hole.