JP2963035B2 - Disk cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to relates to a disk cartridge accommodating a disk-shaped recording medium.

[0002]

2. Description of the Related Art A disc-shaped recording medium used in a recording / reproducing apparatus is housed in a disc cartridge in order to prevent the disc-shaped recording medium from being damaged when not in use and from adhering dust. Is protected by FIG. 11 shows an example of such a disk cartridge. In FIG.
Reference numeral 01 denotes a case composed of an upper half 101a and a lower half 101b. The case 101 accommodates a disk-shaped recording medium 102. A rotating hole 103 for rotating the disk-shaped recording medium when the disk cartridge is loaded in the recording / reproducing apparatus,
A head insertion hole 104 to which the head can access to read and write information is formed.

Here, a shutter 106 is attached to the case 101 in order to prevent dust from entering the inside of the case 101 from the rotation hole 103 or the head insertion hole 104. In addition, the shutter 106 is
The rotation hole 103 and the head insertion hole 104 are always urged by a torsion coil spring 107 housed in the housing 1.

An opening / closing pin P is brought into contact with a portion 106a projecting to the left side of the shutter 106 in FIG. 11 to open a head insertion hole 104 and the like against the urging force of a torsion coil spring 107.

[0005]

However, in such a conventional disk cartridge, the metal shutter 106 is in direct sliding contact with the case 101.
It is difficult to slide the shutter 106 smoothly with respect to the case 101, and since the shutter 106 and the case 101 are not provided with a guide portion for guiding the shutter 106 in the sliding direction, the shutter 106 is moved in the sliding direction. There was a problem that it was not possible to be surely guided to. Therefore, it is conceivable to attach a slider that slides on the case 101. However, since the shutter 106 must be provided with a protruding portion 106a with which the opening / closing pin P contacts, the shutter 106 portion on which the slider is attached becomes complicated. In addition, there is a possibility that the size of the disk cartridge is increased.

[0006]

To solve Means for Solving the Problems] The problem, disk cartridge of the present invention, a synthetic resin disc-like recording medium is accommodated in the case, the sheet metal
Is formed by bending it into a U-shaped cross section,
A shutter for opening and closing the formed head insertion hole, and a shutter attached to the shutter for sliding in the opening and closing direction of the shutter.
Manner a disc cartridge including a edge in sliding contact plastic slider of the case, before
The slider is located inside the bent portion of the shutter.
And a shutter support portion for fixing the shutter, protruding from the shutter closing direction side end portion of the bent portion of the shutter <br/> data
It has extended formed to the extension portion, further
Move the shutter in the opening direction to the tip of the extension
Abutting projection for abutting an opening / closing pin and the case
Having an engagement projection that engages with the guide engagement portion formed on the
Cage, the thickness of the thin portion, read and write so that the head can pass to carry out the information, as well as within the thickness of the recessed portion formed by recessing the guide portion for guiding the shutter of the case, The length of the extended portion is equal to or greater than the width of the recess , and the contact protrusion and the engagement protrusion are recessed.
It was configured to be thicker than the thickness of the part .

[0007] Since the scan <br/> rider in to Disk cartridge of the present invention are formed Shin portion extending from the portion where the shutter is attached, is brought into contact with the opening and closing pin at the tip of the extension portion By pressing the slider, the shutter can be opened and closed. Therefore, it is not necessary to form a protruding portion in contact with the opening / closing pin on the shutter.

By the way, when the slider is pressed, the shutter is opened, and the open state of the shutter is maintained by the open / close pin. At this time, the extended portion of the slider is located in the recess formed in the guide portion of the shutter of the case. The leading end face of the head for reading and writing information approaches the dent portion from the side and passes through the dent portion. However, when the tip end surface passes, it must be prevented from abutting on the extended portion. Therefore, the thickness of the extended portion is set to be within the thickness of the concave portion, and the length of the extended portion is set to be equal to or larger than the width of the concave portion. For this reason, even if the tip of the head moves toward the head insertion hole, the head can be positioned in the head insertion hole without abutting against and being blocked by the extended portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 has an upper half 1a and a lower half 1 made of a rectangular flat casing.
b. The case 1 houses a 3.5-inch optical disk 2 (disk-shaped recording medium) on which optical information is recorded. In the center of the lower half 1b of the case 1, when the optical disc 2 is loaded in the recording / reproducing apparatus,
A rotation hole 4 for rotating the optical disk 2 in the case 1 by a spindle motor (not shown) is formed, and a hub portion 2 a provided at the center of the optical disk 2 is exposed from the rotation hole 4. Upper and lower half 1 of case 1
Head insertion holes 3 are formed in a and 1b so that an optical head (not shown) 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 in order to prevent dust from entering the case 1 through the rotation hole 4 and the head insertion hole 3.
Is installed. The shutter 5 is formed by bending a thin metal plate of stainless steel or the like into a substantially U-shaped cross section from substantially the center, and includes an opening / closing plate portion 6 for opening and closing the rotary hole 4 and the head insertion hole 3. Also has an auxiliary opening / closing plate 7 having a short bending length.

As shown in FIG. 3, a guide portion G formed at the leading end of the case 1 on the recording / reproducing apparatus insertion side is formed on the left side in the figure and extends horizontally to a position dropped from the upper end surface of the case 1. It has a guide surface 8. An opening / closing pin P for opening and closing the shutter 5 and a recess 9 for dropping when the shutter 5 is opened are formed on the right side of the guide surface 8 in FIG. The opening / closing pin P moves the shutter 5 to the right in FIG. 3 to open the head insertion hole 3.

A bent portion 5a of the shutter 5 having a substantially U-shaped cross section
A slider 12 made of a synthetic resin such as polyacetal, which is in sliding contact with the guide portion G, is attached to the inner surface side of the slider. The slider 12 has a substantially right half in FIG.
Are fixed to the inner surface side of the base plate by tapping screws or the like.

The slider 12 has an elongated rod shape as a whole as shown in FIG. 4, has a substantially rectangular cross section, is located inside the bent portion 5a of the shutter 5, and supports the shutter 5 for supporting the shutter 5. A portion 21 and a narrow extending portion 22 formed by extending from the supporting portion 21 to the lower left in FIG. 4, and the thickness t _{1 of the} extending portion 22 as viewed from above in the figure.
Are formed so as to be smaller than the same thickness t ₂ of the support portion 21. The engaging portion 23 is formed in FIG right side of the support portion 21, also the engaging portion 24 is formed on the left side of the extension portion 22, the engaging portion 24 is formed on the upper those It consists contact protrusion 25 and is formed on the lower side engaging projections 26.. The support portion 21 is formed with screw holes 21 a, 21 a, and the abutting protrusion 25 protrudes left and right from the tip of the extended portion 22.

As shown in FIGS. 5 and 6, a pair of projections 23 are provided on both sides of the engagement portion 23 of the slider 12.
a, 23b are formed, and the pair of protrusions 23a, 2b are formed.
3b is a slider 12 on the inner wall surfaces of the upper and lower halves 1a and 1b.
A pair of guide grooves 27a, 2 formed in the sliding direction of
7b. Note that one protruding portion 23a is formed long and the other protruding portion 23b is formed short. Engagement
A first spring receiving portion 15 is formed in the portion 23 to which one end 14a of the torsion coil spring 14 is engaged.
The hook 5 has a hook 15a. The other end 14b of the torsion coil spring 14 is provided at the upper right end in FIG.
Is formed, and the slider 12 is urged leftward in FIG. 6 by the urging force of the torsion coil spring 14. The engaging portion 23 has a split groove 23c into which the torsion coil spring 14 can be fitted.
And, the other protrusion content 23b is formed short, when the shutter 5 in the fully open, as shown in FIG. 6, the other end of the arm 14b of the torsion coil spring 14 protrusion
This is to avoid colliding with the minute 23b.

On the other hand, as shown in FIG. 7, the slider 12 has a bent portion 5 of the shutter 5 so as to be able to contact the opening / closing pin P.
are formed by extending leftward in the drawing from a, are you decrease the thickness t ₁ of the extension portion 22, the shutter 5
This is to prevent a pair of heads h of the recording / reproducing apparatus from coming into contact with the head insertion port 3 even when the pair of heads h approaches the head insertion opening 3 from the side in a state where the head is opened. That is, the head h is shown in FIG.
As shown in FIG. 8, the case 1 is moved toward the head insertion hole 3 from the side of the insertion tip side of the case 1. This head h
The distal end surface h ₁ of a position close to the housing surface of the optical disc 2. Therefore, to allow passage approaching from the front end face h ₁ is the side of the head h is the insertion tip side of the case 1, recess 31 having a thickness of t ₃ when by recessing the surface of the case 1
Is formed. The thickness t ₃ and width l of the recess 31
_1, the head h of the front end surface h ₁ is in a predetermined passable thickness t
₃ and width l ₁ .

Then, the slider 1 is moved by the open / close pin P.
2 is pushed rightward, the shutter 5 is opened and the open / close pin P
It falls into the relief recess 9 and is
Thus, the open state of the shutter 5 is maintained. At this time,
The extended portion 22 of the rider 12 is located at the concave portion 31 of the case 1.
It is location. As described above, the recess 31 has the head h
Tip surface h₁Passes, but this tip surface h passes₁Grows
It must be prevented from contacting the setting portion 22. There
And the thickness t of the extension 22₁Is the thickness t of the recess 31 _ThreeMore
(Thickness t_ThreeAnd extension part 2)
2 length l_TwoIs the width l of the recess 31₁Slightly larger (width
l₁And may be the same).

When the shutter h is opened and the head h moves to the head insertion opening 3 facing from the near side in FIG. 7, the surface h ₁ approaches the surface of the recess 31 and then approaches the recess. It passes through the part 31. Extension part 22
Is formed to the thickness t ₁ and the length l ₂ described above, so that even if the tip h ₁ of the head h moves toward the head insertion hole 3, It can be located in the head insertion hole 3 without being blocked. Therefore, when the shutter 5 is opened via the slider 12 by the opening / closing pin P, the head h is
The optical disc 2 can be positioned in the head insertion hole 3 without being blocked by contact with the optical disc 2, so that reading and writing of information on the optical disc 2 can be performed reliably.

The contact projection 25 formed at the tip of the extension 22 of the slider 12 slides on the guide surface 8. Further, on the left end side of the extension portion 22, an engagement protrusion 26 is integrally formed via an arm 33 formed below as shown in FIGS. Engagement projection 2
6 are engaged with guide engagement portions 28a, 28b formed on the case 1 along the sliding direction of the slider 12, respectively.
The slider 12 is guided in the sliding direction, and is prevented from easily coming off the case 1. When the shutter 5 is completely opened, the upper surface of the engaging projection 26 is substantially flush with the bottom of the escape recess 9 formed in the guide portion G, and the opening and closing pin P is inserted into the escape recess 9. It is not disturbed.

On the other hand, since the extended portion 22 is formed to extend from the bent portion 5a of the shutter 5 on the slider 12, the opening / closing pin P is brought into contact with the protruding end of the extended portion 22 to push the slider 12. Thus, the shutter 5 can be opened and closed. Therefore, it is not necessary to form a protruding portion in contact with the opening / closing pin P on the shutter 5, and the extended portion 22 of the slider 12 has the role of the protruding portion, thereby simplifying the portion of the shutter 5 to which the slider 12 is attached. And
This disk cartridge can be downsized.

[0020]

As described above, according to the present invention,
Since the slider is formed by extending an extended portion to which the opening / closing pin can abut from a portion where the shutter is attached, the shutter can be opened and closed by bringing the opening / closing pin into contact with the extended portion. Therefore, it is not necessary to form a protruding portion in contact with the opening / closing pin on the shutter, and the shutter portion to which the slider is attached is simplified, and the disk cartridge can be downsized.

Further, the thickness of the extended portion of the slider is set within the thickness of a recess formed by recessing a guide portion for guiding a shutter of the case so that a head for reading and writing information can pass therethrough. At the same time, since the length of the extended portion is equal to or greater than the width of the concave portion, even when the head is moved toward the head insertion hole when the shutter is opened via the slider by the opening / closing pin, the length of the extended portion can be reduced. The head can be positioned in the head insertion hole without being blocked by the abutment on the extending portion, and the reading and writing of information on the disk-shaped recording medium can be reliably performed. And the tip of the extension
A contact projection formed thicker than the thickness of the recess;
The dent is formed by adopting the structure with the engagement projection.
Guide the slider to the thin part of the formed case
The disk cartridge can be
It is possible to prevent the case from becoming brittle when downsizing
it can.

[Brief description of the drawings]

FIG. 1 is a perspective view of the front side of a disk cartridge using a slider.

FIG. 2 is a perspective view of the back side of a disk cartridge using a slider.

FIG. 3 is a front view of the disk cartridge.

FIG. 4 is a perspective view of a slider.

FIG. 5 is a sectional view taken along line VV in FIG. 3;

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a partial plan view of the disk cartridge.

FIG. 8 is an explanatory diagram of a state of a guide unit when a shutter is opened.

FIG. 9 is a partial sectional view of the disk cartridge.

FIG. 10 is a sectional view taken along line XX in FIG. 9;

FIG. 11 is a perspective view showing a conventional disk cartridge.

[Explanation of symbols]

1 ... Case 3 ... head insertion hole 5 ... shutter 12 ... slider 22 ... thickness l ₂ ... length of Shin portion Shin portions 23, 24 ... engaging portion 31 ... recessed portion t ₂ ... Shin portion

Claims (3)

(57) [Claims] 1. A synthetic tree containing a disk-shaped recording medium
Fold a fat case and a metal sheet into a U-shaped cross section
Is formed, and a shutter for opening and closing the head insertion hole formed in the casing, attached to this shutter,
A disk comprising a synthetic resin slider that slides in the opening and closing direction of the shutter and slides on the edge of the case.
A cartridge, the slider, the shutter
And Shah <br/> jitter support portion for fixing the shutter positioned inside the bent portion of the data, shut in bent portions of the shutter
And a Shin portion formed by extending so as to protrude from the motor closing direction side end portion, further to the distal end of the extension portion, said sheet
Abuts an open / close pin for moving the shutter in the opening direction
Engagement with the contact protrusion and the guide engagement portion formed on the case
It has an engagement projection part that fits, and the thickness of the extended part is
In order to allow a head for reading and writing information to pass therethrough, the thickness of the extended portion is set to be within the thickness of a concave portion formed by recessing the guide portion for guiding the shutter of the case, and the length of the extended portion is set to the concave portion. And the contact projection portion
Disk cartridges, characterized in that said engaging projection portion is formed thicker than the thickness of the recessed portion. To 2. A shutter opening direction side of the sheet Yatta support,
Disk cart Li <br/> Tsu di according to claim 1, the elastic member for urging the shutter in the closed direction, wherein the engageable. When wherein shutter shea Yatta support part is fixed, claims, characterized in that the bent portion surface and Shin portion of the surface of the sheet Yatta is formed so as to be substantially flush disc cartridge according to any one of 1 or 2.