JP2592852Y2 - Disk cartridge - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge which can be easily assembled.

[0002]

2. Description of the Related Art A disk-shaped recording medium used in a recording / reproducing apparatus is protected by being housed in a disk cartridge in order to prevent breakage and dust adhesion when not in use. . Such a disk cartridge has a case composed of a combination of an upper half and a lower half, in which a disk-shaped recording medium such as a magnetic disk or an optical disk is stored. In addition, the case has a rotating hole into which a spindle is inserted to rotate the disk-shaped recording medium when the disk cartridge is mounted on a recording / reproducing apparatus, and a head to which a head can be accessed to read and write information. An insertion hole is formed.

In order to prevent dust from entering the inside of the case from the rotation hole or the head insertion hole, a metal shutter is attached to the case. The shutter is fixed to a slider that slides on the case, and the slider is constantly urged in the closing direction by a torsion coil spring housed in the case, so that the shutter closes the rotation hole and the head insertion hole. Then, the opening / closing pin is brought into contact with the protrusion of the slider protruding toward the player of the recording / reproducing apparatus,
The head insertion hole and the rotation hole are opened against the urging force of the torsion coil spring.

Further, the case is provided with a double write protection unit to prevent information from being double-written on the optical disk or the magnetic disk housed in the case.

[0005]

Such a disk cartridge needs to be manufactured by automatic assembly. However, in the conventional 3.5-inch disk cartridge, it is difficult to connect the engagement portion between the torsion coil spring and the slider. Alternatively, it has been difficult to automatically assemble the disk cartridge due to difficulty in coupling the parts of the double write protection unit to the storage wall of the case.

The present invention has been made in view of such circumstances, and a problem thereof is to provide a disk cartridge which can easily perform automatic assembly.

[0007]

In order to solve the above problems SUMMARY OF THE INVENTION The disk cartridge of the present invention, a pair of projections which engage in guides formed on the case on the side for accommodating the torsion coil spring of the slider for holding the shutter the portion provided in the disk cartridge as the arm of the torsion carp <br/> Rubane been accompanied between the projecting portion to the opening and closing operation of the shutter is moved, one of the pair of the protruding portion, at least one of the projections A corner along the longitudinal direction of the portion where the arm of the coil spring contacts was chamfered.

Further, the disk cartridge of the present invention is:
A case that consists of an upper half and a lower half
Head insertion hole formed in this case
And a rotating hole into which the spindle motor's rotating shaft is inserted.
Screw for urging the shutter to close in the direction to close both holes
One end of the torsion coil spring
Dies that are to be engaged with spring receivers formed at the corners of the
In the disc cartridge, the spring receiving portion may be an upper half piece or
Is the upper or lower plate of the lower half and the side walls of the upper or lower half
The inner side is formed flat at an angle of about 45 degrees with respect to
A sloping wall having a guide surface, and
Wide entrance formed by a stopper piece protruding to the side
Part, and the guide surface has a root of the stopper piece.
Adjacent to the original upper part and substantially perpendicular to the guide surface
A spring receiving groove inclined in the direction is formed .

[0009] Further, the present invention relates to a first or second aspect of the present invention.
In the disc cartridge, at the corner of the case,
Double write protection to prevent double write on disk
A stop mechanism, and the double write prevention mechanism is provided with the cable
A closing piece that opens and closes the hole formed in the
Storage for movably storing between the closed position and open position of the hole
A wall, wherein the closing piece is formed by an engagement protrusion formed on the storage wall.
A resilient engaging leg for engaging the closing piece.
The closed position is achieved by the engaging legs engaging the two ends of the engaging projection.
To the center position of the engaging projection.
A recess is provided, and when the closing piece is incorporated into the storage wall, the recess is used.
The engaging portion of the engaging leg of the closing piece is accommodated in the
Was .

[0010]

[Action] As described above, if Hodokose chamfered as arms of the torsion coil spring to the corner portion along the longitudinal direction of the protrusion amount is not contact, the movement of the torsion coil spring with the opening and closing operation of the shutter is smoothly Become.

[0011] Further, the spring receiving portion is provided on the upper half or the lower half.
Plate or lower plate, and about 4 with respect to the side wall of the upper half or lower half.
It has a guide surface whose inner surface is formed flat at an angle of 5 degrees.
Inclined wall and projecting from the inclined wall to the inside of the cartridge
It has a wide entrance formed by the stopper piece and
The guide surface has an upper portion at the base of the stopper piece.
And is inclined in a direction substantially perpendicular to the guide surface.
If a spring receiving groove is formed, one end of the torsion coil spring
When installing from the cartridge insertion side into the
One end of the coil spring is guided by the guide surface, and
Inserted smoothly into the spring receiving groove
Later, one end of the torsion coil spring may come off
It is surely prevented .

Further, the corner of the case has a disk
Double write protection mechanism to prevent double write
The double write protection mechanism is formed in the case.
A closing piece for opening and closing the hole, and a closing piece for closing the hole.
It has a storage wall that movably stores between the position and the open position,
The closing piece engages with an engaging projection formed on the storage wall.
Resilient engaging legs, wherein the closing legs engage the closing piece.
Closed and open positions by locking to both ends of the mating projection
And a recess is provided in the center of the engagement protrusion.
When the closing piece is installed in the storage wall, the closing piece is closed in the recess.
It is configured to receive the engaging portion of the one engaging leg portion
So that there is no interference between the closing piece and the two storage walls and the closing piece
Assemble smoothly into each storage wall of the disc cartridge
Can be stored .

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1 denotes a disk cartridge case. The case 1 is made of a synthetic resin, and includes an upper half 1a and a lower half 1b, each of which has a rectangular flat casing. In the case 1, for example, a 3.5-inch optical disk 2 (disk-shaped recording medium) on which optical information is recorded is accommodated. Lower half 1 of case 1
In the center of b, a rotation hole 4 for rotating the optical disk 2 in the case 1 by a spindle motor (not shown) when the optical disk 2 is mounted on the recording / reproducing apparatus is formed. The hub 2a provided at the center of the optical disk 2 is exposed. Also on Case 1
Head insertion holes 3 are formed in the lower halves 1a and 1b so that an optical head h (see FIG. 3) for reading information recorded on the optical disk 2 can be accessed.

When the optical disk 2 is not used, a shutter 5 is provided on the case 1 to prevent dust from entering the case 1 from the rotation hole 4 and the head insertion hole 3.
Is installed. The shutter 5 is formed by bending a thin metal plate made of stainless steel or the like into a substantially U-shaped cross section from a substantially central bent portion 5 a, and an opening / closing plate portion 6 for opening and closing the rotary hole 4 and the head insertion hole 3. An auxiliary opening / closing plate portion 7 having a shorter bending length than the opening / closing plate portion 6 is provided. The opening / closing plate 6 of the shutter 5 is slidable in a shallow recess R1 formed in the lower half 1b, and the auxiliary opening / closing plate 7 is slidable in a shallow recess R2 formed in the upper half 1a. The lifting of the end of the portion 6 is regulated by a stainless steel holding plate 40 (see FIG. 2), and the lifting of the tip of the auxiliary opening / closing plate portion 7 is similarly limited by a holding plate 41. (See FIG. 1).

As shown in FIG. 3, a guide portion G formed at the end of the case 1 where the recording / reproducing apparatus is inserted is formed on the left side in the figure and extends horizontally from the upper end surface of the case 1 to a position which falls. It has a surface 8. On the right side of the guide surface 8 in the figure, an escape recess 9 is formed for the opening / closing pin P provided on the player side for opening and closing the shutter 5 to drop when the shutter 5 is opened.

A bent portion 5a of the shutter 5 having a substantially U-shaped cross section
The slider 12 made of a synthetic resin such as polyacetal or the like, which slides on the guide portion G, is fixed to the inner surface of the right side of FIG. 3 with a tapping screw or the like on the inner surface of the bent portion 5a.

The slider 12 has an elongated rod shape as a whole as shown in FIG. 4, has a substantially rectangular cross section, and is located inside the bent portion 5a of the shutter 5.
And a narrow extending portion 22 formed by extending the supporting portion 21 to the lower left in FIG. 4, and a first engaging portion is provided on the right side of the supporting portion 21. A joining portion 23 is formed, and a second engaging portion 24 is also formed on the left side of the extending portion 22. The second engaging portion 24 is formed with a slide guide piece 25 formed on the upper side and extending left and right, and Arm 33 on the lower side
And a fitting portion 26 formed through the hole.

Also, the slide guide piece 25 and the arm 33
The T-shaped surface (see FIG. 4) formed at the end face of the first surface is smoothed. A pair of protrusions 23a and 23b are formed on both sides of the first engagement portion 23 of the slider 12, and the pair of protrusions 23a and 23b are formed on the inner wall surfaces of the upper and lower halves 1a and 1b in the sliding direction of the slider 12. Are fitted in a pair of guide grooves 27a and 27b (see FIG. 6) formed toward the front.

Then, as shown in FIG.
One arm 14 of the torsion coil spring 14
A chamfer (including R) is provided along the longitudinal direction up to the end surface of the shutter support portion 21 so as not to hinder the movement of a. Note that one protruding portion 23a is formed long and the other protruding portion 23b is formed short. First
As shown in FIG. 6, the one end arm 1 of the torsion coil spring 14 provided in the spring housing 17 of the case is provided on the engagement protrusion 23.
A first spring receiving portion 15 with which the first spring receiving portion 4a is engaged is formed, and a hook 15a (see FIG. 5) is formed on the first spring receiving portion 15. An opening w (see FIG. 7) into which the bent tip 14c of the spring is inserted is formed on the side surface of the spring receiving portion 15,
The bent end 14c of the spring is hooked in the opening w, so that the spring end does not come off from the slider 12. Also,
As another embodiment of the chamfering, as shown in FIG. 8, chamfers 23h and 23i may be formed on the protruding portions 23a and 23b of the slider 12 on the side of the split groove 23c at the end face of each end.

Also in this case, the one end arm 14a of the torsion coil spring 14 can move smoothly without being caught on the projection 23a. Furthermore, as another embodiment of the chamfering, the protruding part 23a is chamfered on the upper and lower corners and the end face on the side of the split groove 23c, while the protruding part 23b is also a protruding part 23a.
Similarly, chamfers 23i and 23k may be applied.

Further, as shown in FIG.
a may be formed to have a tapered tip. On the other hand, at the upper right end in FIG. 7 of the case 1, the second spring receiving portion 1 is engaged with the bent other end 14 d of the other end arm portion 14 b of the torsion coil spring 14.
6, the slider 12 is urged leftward in the figure by the urging force of the torsion coil spring 14. 7, a spring receiving groove 42 for storing the bent other end 14d of the torsion coil spring 14 is provided on the upper half 1a side of the second spring receiving portion 16.
A stopper piece 43 but which face formed to an inclined wall 41
Are formed in the vicinity of the connecting portion of the first embodiment.

The inside of the upper half 1a of the inclined wall 41 is
The guide surface 42a formed in a flat shape is cut in parallel with the side surface of the upper half 1a to form a wide entrance of the spring receiving groove 42. That is, as shown in FIG. 7, FIG. 16 and FIG.
The spring receiving portion 16 includes an upper plate 103 of the upper half 1a and the upper half 103.
At an angle of approximately 45 degrees with respect to the side wall 102 of the piece 1a,
Inclined wall 41 having guide surface 42a formed in a flat shape
And a strike projecting from the inclined wall 41 to the inside of the cartridge.
Have have a wide entrance portion formed by the Tsu Pas piece 43
You. Further, the stopper piece 43 is provided on the guide surface 42a.
Adjacent to the upper part of the root of
A spring receiving groove 42 inclined in a direction substantially orthogonal to the direction is formed.
I have. For this reason, the other end 14 of the torsion coil spring 14 is bent.
d is attached to the second spring receiving portion 16, the other arm 14
b is guided by the guide surface 42a of the inclined wall 41 and the spring receiving groove 4
2 is inserted smoothly. In this manner, the bent end 14a and the bent other end 14d of the torsion coil spring 14 are smoothly inserted into the first spring receiving portion 15 and the second spring receiving portion 16, respectively. The torsion coil spring 14 is shown in FIG. Is housed in the spring housing 17 as described above. In the first spring receiving portion 16
In particular, the guide surface 42a is opposed to the side wall 102 of the upper half 1a.
And is formed in a flat shape at an angle of approximately 45 degrees.
The groove 42 is inclined in a direction substantially orthogonal to the guide surface 42a.
Therefore, the other end 14d of the torsion coil spring 14 is bent.
After being inserted into the receiving groove 42,
d is reliably prevented from deviating therefrom.

Further, when the slider 12 is slid rightward to open the shutter 5, the torsion coil spring 14
Is pressed, and the one-end arm 14a rotates in the direction A from the upper position in FIG. One end arm 1
4a is located above the spring accommodating portion 17 as shown in FIG.
a slightly comes into contact with the upper corner 23f. When the one end arm portion 14a comes into contact with the upper corner portion 23f and gets caught,
The one end arm 14a is relatively pushed upward by the upper corner 23f, and there is a possibility that the one end 14c may come off from the first spring receiving portion 15. But,
Since the upper corner portion 23f is chamfered, even if the one end arm portion 14a abuts on the upper corner portion 23f, the arm portion 14a is not caught on the upper corner portion 23a but can be rubbed off as it is to enter the split groove 23c. it can. Thus, the projections 23 on both sides
By chamfering the entrance side of the split groove 23c of a, 23b,
The arm is prevented from being caught due to the expansion and contraction of the spring. on the other hand,
The other arm 14b has a protruding portion 23b as shown in FIG.
Is cut off and does not extend to the front end of the case, so that the other end arm portion 14b does not come into contact with the projecting portion 23b.

As shown in FIG. 11, a double write protection section 160 is provided at the lower right corner of the case 1 in order to prevent information from being double written on the optical disk 2 stored in the case 1. Is provided. That is, as shown in FIG. 15, the double write protection unit 160 allows light emitted from a light emitting unit (for example, a light emitting diode) of a double write sensor (not shown) provided in the recording / reproducing apparatus to pass therethrough. The first, formed on the upper and lower halves 1a, 1b, respectively.
It has second through holes 213a and 213b, and the irradiation light passing through the first and second through holes 213a and 213b is received by a light receiving section (for example, a photodiode) of the sensor. First and second passage holes 213a, 213
The irradiation light passing through “b” is blocked by the closing piece 215. As shown in FIGS. 12 and 13, the closing piece 215 includes a main body 216 having a substantially box shape as a whole,
16, two engaging legs 217a extending from both side ends of the
217b, and the engaging legs 217a, 217b
At the tip of 17b, bulges 217c and 217d are formed on the outside.

The closing piece 215 is stored in a storage wall 218 formed in the lower half 1b, and is slidable in the storage wall 218. Engagement projections 218a and 218b are formed inside the lower half 1b of the storage wall 218 so as to be able to engage with the engagement legs 217a and 217b of the closing piece 215. The engaging projections 218a and 218b have a certain length, and when the tips of the engaging projections 218a and 218b are engaged with the bulges 217c and 217d of the leg (solid state in FIG.
3a and 213b are closed and the bulges 217c and 17d are closed.
Are the projections 218a, 218b of the rear end of the leg bulge 21
7c and 217d (the state shown by the dashed line in FIG. 13), the through holes 213a and 213b are opened. When the closing piece 215 is assembled and stored in the storage wall 218, its open position must be positioned at any one of the closed positions.
5 is required to have high precision. Therefore, as shown in FIG. 14, the central portions of the engagement protrusions 218a and 218b are cut out in an arc shape to form recesses 218a-3 and 218b-3, and the protrusions 218a-1 and 218a- are formed at the front and rear ends thereof.
2, 218b-1 and 218b-2 are respectively formed, and when the closing piece 215 is stored in the storage wall 318, the bulges 217c and 217d of the leg portions are positioned in these recesses. That is, the recesses 218a-3, 21
8b-3 has a certain size, so that when the shut-off valve 215 is installed in the storage wall 318, it can be installed even if its installation position is shifted. After the assembly, the closing piece 215 can be positioned at the closed position or the open position by moving the closing piece 215 to either one.

As shown in FIG. 12, insertion recesses 505, 505 for inserting pins or the like to move the closing piece 215 on both sides of the through hole 213b on the lower half 1b side.
Are formed.

That is, when the closing piece 215 is moved downward from the position shown in FIG.
The bulges 217c and 217d of 7a and 217b are
Engagement with lower ends 218a-2, 218b-2 of 18a, 318b, main body 216 is held at a position to open first and second passage holes 213a, 213b shown in FIG.

[0028]

As described above, according to the first aspect of the present invention, the spring member can be smoothly mounted on the first engaging portion, and when the disk cartridge is inserted into the recording / reproducing apparatus, the opening / closing pin is smoothly operated. Is set to a predetermined position.

According to the second aspect of the present invention, a torsion coil is provided.
Of the spring into the spring receiving groove from the cartridge insertion side.
One end of the torsion coil spring is guided by the guide surface.
And is smoothly inserted into the spring receiving groove.
After being inserted into the groove, one end of the torsion coil spring
Is reliably prevented from coming off . Furthermore, according to the invention of claim 3, there is no interference between the closing piece and the two storage walls.
And close the closing piece in each storage wall of the disc cartridge.
Can be assembled and stored in mousse . Therefore, automatic assembly of the disk cartridge can be easily performed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a 3.5-inch disk cartridge according to an embodiment of the present invention when viewed from an upper half side.

FIG. 2 is a perspective view of the 3.5-inch disc cartridge shown in FIG. 1 as viewed from the lower half.

FIG. 3 is a front view of the disk cartridge when the shutter of the 3.5-inch disk cartridge shown in FIG. 1 is opened.

FIG. 4 is a perspective view of a slider.

FIG. 5 is a perspective view of a front end side of the slider.

FIG. 6 is a plan view of a front end side of a guide portion of the disk cartridge.

FIG. 7 is an inner view of an upper half of a spring receiving portion at a front end of a case for receiving a torsion coil spring end;

FIG. 8 is a perspective view of a front end side of the slider.

FIG. 9 is a perspective view of a front end side of the slider.

FIG. 10 is a partial perspective view of a protrusion of the slider.

FIG. 11 is a perspective view of a block of a write protection mechanism.

FIG. 12 is a perspective view of the lower half of the write protection mechanism.

FIG. 13 is a plan view of the write protection mechanism of FIG. 11;

FIG. 14 is a perspective view of the upper half side of the write protection mechanism.

FIG. 15 is a sectional view of the write protection mechanism.

FIG. 16 FIG. 5 is a perspective view of a second spring receiving portion viewed from one side.
You.

FIG. FIG. 9 is a perspective view of a second spring receiving portion as viewed from the other side.
You.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Case 1a ... Upper half piece 5 ... Shutter 12 ... Slider 14 ... Torsion coil spring 16 ... Second spring receiving parts 23a and 23b ... Projection part 41 ... Inclining wall 42 ... Spring receiving groove 42a ... Guide surface 43 ... Stopper piece 102 ... Side walls 103 Upper plates 120, 120, 122, 122 Support pins 122a, 122a Positioning pins 123, 123, 123, 123 Supported parts 130, 131 Positioning holes

Claims (3)

(57) [Scope of request for utility model registration] 1. A pair of the protruding portion which engages a guide formed in the casing on the side which houses the torsion carp <br/> Le spring of the slider which holds the shutter provided between the projecting portion to the opening and closing operation of the shutter in the disk cartridge as the arm of the torsion coil spring is accompanied moves, one of the pair of the protruding portion, chamfered corners along the longitudinal direction of the arm of the coil spring of at least one of the protruding portion is in contact A disk cartridge characterized by the above-mentioned. 2. A disk comprising an upper half and a lower half.
With a case for storing
Head insertion hole and the spindle motor rotation shaft
The shutter that opens and closes the rotating hole to be closed
A torsion coil spring that urges the
Lock one end of the claw into the spring receiver formed at the corner of the case
In the disk cartridge having the above structure,
The upper half or lower half of the upper plate or lower plate, the upper half or
Indicates that the inner surface is flat at an angle of approximately 45 degrees with respect to the side wall of the lower half.
Inclined wall having a guide surface formed in a shape, and from the inclined wall
Formed with stopper pieces protruding inside the cartridge
Has a wide entrance portion, and further, the guide surface has the
Adjacent to the upper part of the base of the stopper piece, and
A spring receiving groove inclined in a direction substantially perpendicular to the surface is formed
Disc cartridge, characterized in that there. 3. The corner of the case is provided with a disk
A double write protection mechanism is provided to prevent double write.
The double write protection mechanism is formed in the case.
A closing piece for opening and closing the hole, and a closing position of the hole for closing the hole;
And a storage wall for movably storing between the open position and the open position,
The closing piece is a bullet engaging with an engaging projection formed on the storage wall.
A locking engagement leg, and the closing leg has an engagement protrusion.
Closed and open positions by locking at both ends
Positioning, providing a recess at the center of the engagement protrusion,
When the closing piece is installed in the storage wall, the closing piece engages in the recess.
It is characterized in that the engaging part of the joint leg is stored.
The disk cartridge according to claim 1 or 2, wherein