JPH0636291B2 - Disco Cartridge - Google Patents

Description

The present invention relates to a disk cartridge such as a magnetic disk cartridge, an optical disk cartridge, and an optical-magnetic disk cartridge, and more particularly to opening and closing a head access port. The present invention relates to a disk cartridge having a shutter to perform.

[Conventional technology]

FIG. 29 is an exploded perspective view of a conventional magnetic disk cartridge, and FIG. 30 is a partial cross-sectional view showing an engaging structure between the shutter of the magnetic disk cartridge and the cartridge case, and FIG. 31 is the magnetic disk cartridge. It is a partial cross section figure which shows the engagement structure of the shutter of a torridji and a spring.

The magnetic disk cartridge is composed of a cartridge case 101 formed of a hard synthetic resin, a magnetic disk 102 rotatably housed therein, and a shutter 103 slidably supported by the cartridge case 101. It is mainly composed.

A circular opening 1 is formed in the center of the cartridge case 101.
04 is formed, and the head insertion port 105 is provided near it. Since the shutter 103 slides on the head insertion opening 105, the upper surface in the vicinity of the head insertion opening 105 is slightly lowered to form a concave portion 106, and the shutter 103 slides near the front surface of the concave portion 106. A guide groove 107 extending along the direction is provided.

The shutter 103 is made of, for example, a metal plate such as a stainless steel plate, and has a U-shaped side surface, and has an opening 108 having substantially the same size as the head insertion opening 105 and the head insertion opening 105 adjacent to the opening 108. The closing portion 109 is formed, and the two protruding pieces 110 are protruded downward by cutting and raising. As shown in FIG. 30, the protrusion 110 is provided with the guide groove 10 of the cartridge case 101.
7 is inserted in the guide groove 107 when the head 103 is opened and closed by the shutter 103.
While sliding inside, the shutter 103 does not come off from the cartridge case 101.

When not using the magnetic disk cartridge, the shutter 1
Since the head insertion opening 105 must be closed by the closing portion 109 of 03, the shutter 103 is a spring 1
It is elastically biased by 11 in the closing direction. FIG. 31 is a view showing the engagement structure between the shutter 103 and the spring 111. As shown in FIG. 31, a spring hook 112 is formed by cutting and raising from the side end surface of the shutter 103 toward the inside. On the other hand, the end of the spring 111 is bent upward, and by elastically contacting the bent portion 113 with the end surface of the spring hook 112, the shutter 103 is always elastically biased in the closing direction.

[Problems to be solved by the invention]

In this conventional magnetic disk cartridge, the projection 110 of the shutter 103 has an opening 108 and a closing portion 10.
It is provided so as to project downward from the face plate portion 114 forming the plate 9. Therefore, when the shutter 103 is assembled in the cartridge case 101, especially when the shutter 103 is made of metal.
In the case of, it deforms and becomes wide open. Therefore 1
When 03 is attached to the cartridge case 101, the dimension of the projecting piece 110 inserted into the guide groove 107 becomes shorter, and as a result, the engagement between the guide groove 107 and the projecting piece 110 becomes uncertain, and even if a small impact is applied, the shutter can be damaged. It becomes easy for 103 to come off from the cartridge case 101.

In order to prevent this from happening, the protrusion 110
If the length of is increased, the tip end of the protrusion 110 is caught on the tip of the cartridge case 101 when the shutter 103 is attached to the cartridge case 101, which makes mounting difficult and the workability is extremely deteriorated.

A shutter 103 and a spring 111 as shown in FIG.
In the case of the engaging structure of No. 1, due to the variation in the vertical position of the spring hook 112 and the variation in the length of the bent portion 113, as shown in FIG.
May come up above the spring hook 112, and the two may not engage with each other. In such a case, it is necessary to assemble the spring 111 again from the beginning, which is troublesome.

The object of the present invention is to eliminate such drawbacks of the prior art,
The purpose of the present invention is to provide a high-quality disc cartridge with a reliable and reliable engagement between the cartridge case and the shutter.

[Problems to be solved by the invention]

In this conventional magnetic disk cartridge, the projection 110 of the shutter 103 has an opening 108 and a closing portion 10.
It is provided so as to project downward from the face plate portion 114 forming the plate 9. When the barrel shutter 103 is assembled into the cartridge case 101, the metal shutter 103 is particularly used.
In the case of, it deforms and becomes wide open. Therefore 1
When 03 is attached to the cartridge case 101, the dimension of the projecting piece 110 inserted into the guide groove 107 becomes shorter, and as a result, the engagement between the guide groove 107 and the projecting piece 110 becomes uncertain, and even if a small impact is applied, the shutter can be damaged. It becomes easy for 103 to come off from the cartridge case 101.

In order to prevent this from happening, the protrusion 110
When the cartridge 103 is attached to the cartridge case 101, the tip end of the protrusion 110 is caught on the tip of the cartridge case 101, which makes attachment difficult and the assembly workability is extremely reduced.

In addition, a shutter 103 and a spring 111 as shown in FIG.
In the case of the engagement structure of No. 1, due to variations in the vertical position of the spring hook 112 and variations in the length of the bending portion 113, the bending portion 1 of the spring 111 at the time of assembly is assembled as shown by the dotted line in FIG.
There is a case where 13 comes above the spring hook piece 112 and the two cannot be engaged with each other. In such a case, it is necessary to assemble the spring 111 again from the beginning, which is a troublesome work.

The object of the present invention is to eliminate such drawbacks of the prior art,
The purpose of the present invention is to provide a high-quality disc cartridge with a reliable and reliable engagement between the cartridge case and the shutter.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention is intended to open and close a cartridge storage case consisting of an upper case and a lower case rotatably storing a disk, and at least a head access opening such as a magnetic head insertion opening of the cartridge storage case. In the disk cartridge including the shutter, the shutter is a face plate portion that opens and closes at least a head access opening of the cartridge casing, and a connecting portion that is connected to an end portion of the face plate portion and faces an end surface of the cartridge casing. And a columnar portion that extends from the inner surface of the connecting portion so as to be inserted into the cartridge case, is provided at a predetermined position, and protrudes toward the inner surface of the upper case at the tip side of the columnar portion. A locking claw and a lower locking claw that protrudes toward the inner surface of the lower case are formed, and on the other hand, the columnar portion of the columnar portion is formed on the end surface of the cartridge case. An opening that allows movement is provided, and ridges that engage with the upper locking claw and the lower locking claw are respectively formed on the inner surfaces of the upper case and the lower case near the opening along the moving direction of the shutter. By engaging the locking claw and the ridge,
The shutter is slidably supported on the cartridge case.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of a magnetic disk cartridge according to an embodiment of the present invention when not in use, FIG. 2 is a plan view of the magnetic disk cartridge in use, and FIG. 3 is a plan view of an upper case. FIG. 4 is a bottom view of the upper case, FIG. 5 is a bottom view of the upper case with a cleaning sheet attached, FIG. 6 is a plan view of the lower case, and FIG. 7 is a state with the cleaning sheet attached. Fig. 8 is a plan view of the lower case, Fig. 8 is a bottom view of the lower case, Fig. 9 is an enlarged plan view of the shatter, Fig. 10 is an enlarged front view of the shatter, and Fig. 11 is an enlarged right side view of the shatter. FIG. 13 is an enlarged bottom view of the shutter, FIG. 13 is an enlarged front view of a main part of the shutter, FIG. 14 is a sectional view taken along line I-I of FIG. 13, and FIG. 15 is a sectional view taken along line II-II of FIG. .

Magnetic Disc Cartridge is a Cartridge Case 1
And a magnetic disk 2 rotatably housed in it,
It is mainly composed of a shutter 3 slidably supported by the cartridge case 1.

The cartridge case 1 is composed of an upper case 1a and a lower case 1b, which are molded of a hard synthetic resin such as ABS resin.

A rectangular head insertion opening 5 is provided near one side of the cart case 1, and a circular opening 4 is formed substantially in the center of the lower case 1b as shown in FIGS. 6 to 8. ing. In the vicinity of the front surfaces of the upper case 1a and the lower case 1b, trapezoidal recesses 6 which are slightly lowered are formed in order to regulate the sliding range of the shutter 3. The head insertion port 5 is opened in the recess 6.

As shown in FIG. 3, a plate pressing port 7 having a substantially rectangular shape is formed on the upstream side of the head insertion port 5 in the upper case 1a in the disk rotation direction, and a label attaching portion which is further lowered is formed behind the plate pressing port 7. 8 is provided, and a label 9 is attached to that portion as shown in FIG. As shown in FIG. 4, the disc housing portion 12 is formed inside the regular ribs 11 provided at the four corners of the inner surface of the upper case 1a. At a location inside the disk storage portion 12 and excluding the head insertion opening 5 and the plate pressing opening 7, one or more arcuate ribs 10 are formed substantially concentrically with the rotation center of the magnetic disk 2 stored in the disk storage portion 12. , Preferably a plurality of them are formed.

The pressing plate 13 shown in FIG. 16 is inserted into the plate pressing port 7. The pressing plate 13 is made of synthetic resin and has substantially the same shape as the plate pressing port 7,
The retaining ribs 14 are formed at both ends, and the retaining ribs 14 engage with the recesses 15 (see FIG. 14) on the inner surface of the upper case 1a to prevent the pressing plate 13 from coming off.

After the pressing plate 13 is inserted into the plate pressing port 7 as shown in FIG. 5, a cleaning sheet 16 made of, for example, polypropylene-rayon mixed paper having substantially the same shape as that of the pressing plate 13 is placed in the disk storage portion 12, and The peripheral portion of is partially heat-sealed to the upper case 1a.
Therefore, the pressing plate 13 is covered with the cleaning sheet 16.

As shown in FIG. 6, the inner surface of the lower case 1b is the upper case 1a.
At a position facing the plate pressing port 7, a receiving portion 18 which is further raised is formed. Similar to the upper case 1a, a disk storage portion 12 is formed on the inner side of the control ribs 11 provided at the four corners of the inner surface of the lower case 1b, and the magnetic disk is provided at a portion excluding the head insertion opening 5 and the receiving portion 18. Rib 1 that is concentric with the center of rotation 2
One or more 0s, preferably a plurality of 0s are provided.

As shown in FIG. 6, the inner surface of the lower case 1b is the upper case 1a.
At a position facing the plate insertion opening 7 of, the receiving portion 18 which is further raised is formed. Similar to the upper case 1a, a disk storage portion 12 is formed on the inner side of the control ribs 11 provided at the four corners of the inner surface of the lower case 1b, and the magnetic disk is provided at a portion excluding the head insertion opening 5 and the receiving portion 18. Rib 1 that is concentric with the center of rotation 2
One or more 0s, preferably a plurality of 0s are provided.

As shown in FIG. 7, the disk storage portion 1 of the lower case 1b.
A cleaning sheet 16 having a substantially C-shape is also placed inside 2 so as to cover the receiving portion 18, and the peripheral portions thereof are partially heat-sealed 17.

As shown in FIGS. 6 and 7, small chevron protrusions 19 facing each other are formed near one corner of the lower case 1b, and a rectangular operation port 20 is formed in the vicinity thereof. A write protector 21 for preventing erroneous erasure is arranged from the operation port 20 to the chevron projection 19. As shown in FIG. 17, the light protector 21 has a main body 2
2 and a leg portion 23, the leg portion 23 elastically engages with the chevron protrusion 19 of the lower case 1b, and the operation protrusion 24 provided on the main body portion 22 is inserted into the operation port 20. There is.
The position of the light protector 21 shown in FIG. 7 is, for example, in a state in which writing (erasing) is not possible, and by sliding this light protector 21 along the longitudinal direction of the operation port 20, the tip end of the leg portion 23 has a chevron shape. The write protector 21 moves, for example, over the two ridges of the protrusion 19 to a writable (erasable) position.

Reference numeral 25 shown in FIGS. 3 and 8 indicates a gate mark, which is formed when the upper case 1a and the lower case 1b are injection-molded. In both the upper case 1a and the lower case 1b, injection molding is performed. One of the gates for is provided at a position corresponding to the recess 6 in which the shutter 3 slides. Since the portion corresponding to the concave portion 6 is thinner than the other portions, that is, the gap between the molds is narrow, if an injection gate is provided at another position of the mold, defective molding occurs in this thin portion. easy. To prevent this from happening,
A gate for injection molding is also provided in a portion corresponding to the recessed portion 6 of the molding die. By providing a gate dedicated to the thin portion in this manner, the injection pressure of the synthetic resin injected and filled from this gate is maintained. It is also possible to make the pressure different from that of the other gates, and the moldability can be improved.

The position of the gate mark 25 formed in the recess 6 is the first.
As shown in FIG. 2 and FIG. 2, the shutter 3 can be used to open or close the head insertion port 5 either closed or open.
It is designed so that it can be hidden by. Upper case 1
In the case of a, the other two gate marks 25 are formed in the label sticking portion 8 so that the gate marks 25 can be hidden by sticking the label 9 as shown in FIG. I'm running.

The shutter 3 is formed of a synthetic resin, such as polyacetal resin or polyamide resin, which is slightly softer than the cartridge case 1 and elastically deformable. The shutter 3 includes a first face plate portion 26, a second face plate portion 27 provided so as to face the first face plate portion 26, and a connecting portion for connecting the front end portions of the double face plate portions 26, 27 to each other. 28, the side shape is U-shaped, and the planar shape is trapezoidal. The first face plate portion 26 and the second face plate portion 27 are
It has a sufficient area for closing the head insertion port 5.

The inner surface of the connecting portion 28 facing the cartridge case 1 is provided with two elastically deformable engaging projections 29 at predetermined intervals along the sliding direction of the shutter 3. The engagement protrusion 29 is composed of a columnar portion 30 extending substantially vertically from the connecting portion 28, and an upper locking claw 31 and a lower locking claw 32 provided at the tip of the columnar portion 30.

As shown in FIG. 19, the upper locking claw 31 is the upper case 1a.
The lower engaging claw 32 is formed so as to protrude toward the inner surface of the lower case 1b.
Also, as shown in FIGS. 13 to 15, the upper locking claw 31
In addition, an inclined twist promoting surface 33 is formed on the side surface and the front end surface of the lower locking claw 32, respectively. Therefore, as shown in FIG. 13, when viewed from the tip end surface side of the engaging projection 29, it is formed into a substantially parallelogram, and the inclination angle θ of the twist promoting surface 33 on the side surface is 5 to 45 degrees, preferably 10 degrees. ~ 30
It is a degree. Further, as shown in FIG. 10, the two engagement protrusions 29 are arranged symmetrically.

As shown in FIGS. 9 and 10, the first face plate portion 26
A concave notch 34 is formed from a part of the above to a part of the connecting part 28, and a contact wall 35 is provided at a side end thereof. The contact wall 35 is integrally connected to the inner surfaces of the first face plate portion 26, the second face plate portion 27 and the connecting portion 28 to reinforce the contact wall 35. The outer surface of the contact wall 35 facing the recess 34 is a contact surface with which the opening member 36 of the shutter 3 provided in the recording / reproducing apparatus abuts, as shown in FIG. On the other hand, the inner surface of the contact wall 35 is
Spring member 3 for elastically urging the shutter 3 in the closing direction
Since the abutment wall 35, the first face plate portion 26, the second face plate portion 27, and the connecting portion 28, which form an abutting surface at which one end of 7 makes elastic contact, form a blind alley-like recessed portion. The end of the inserted spring member 37 does not come off.

As shown in FIGS. 9 and 12, the second face plate portion 27
A waste hole 39 is formed at a position facing the recess 27. This waste hole 39 is formed by the moldability of the shutter 3, especially the first
This is necessary to reduce the variation in wall thickness between the face plate portion 26 and the second face plate portion 27, which will be described with reference to FIG.

The molding die of the shutter 3 includes a side core 40, a side core 41, a fixed core 42 fixed between the side cores 40, 41, and a top core 43. The space 44 that forms the first face plate portion 26 by the side core 40 and the fixed core 42 is
A space 45 is formed by the fixed core 42 and the fixed core 42 to form the second face plate portion 27, and a space 46 is formed by the fixed core 42 and the top core 43 in the connecting portion 28. Further, due to a part of the side core 40, the concave cutout 34 is
The discarding holes 39 are formed by a part of the side cores 41.

When the shutter 3 is injection-molded with the location indicated by the arrow G in FIG. 9 as the gate position, the recess 3 is formed only on the first face plate portion 26 side.
With the shape in which 4 is provided, the flow resistance of the molten resin is different between the space 44 and the space 45, and the flow resistance of the space 44 is larger than that of the space 45. Space 44
And the space 45 have different flow resistances of the molten resin, and if the end 47 side of the fixed core 42 is not clamped from both sides, the molten resin easily flows into the space 45 with a small flow resistance, and the injection pressure of the molten resin is increased. As a result, the fixed core 42 tilts toward the side core 40. Then, the second face plate portion 27 inevitably becomes thicker than the first face plate portion 26, and if it is severe, defective molding occurs.

Therefore, in this embodiment, the end 47 of the fixed core 42 is fixed to the two sliding side cores 40, so as not to tilt.
It is held by 41 so that the widths of the spaces 44 and 45 are constant. Because of this, the fixed core 4 during injection molding
The inclination of 2 is eliminated, and the first face plate portion 26 and the first face plate portion 27
Of equal thickness. In addition, the side core 4 is provided on the space 45 side.
By inserting a part of 1, the above-mentioned waste hole 39 is formed.

FIG. 21 is a perspective view of the spring member 37 used.
The spring member 37 is composed of a leaf spring bent in a V shape, and has engaging recesses 38 formed on both side edges of both ends.

22 and 23 show the spring member 37 and the upper part,
It is a figure which shows the engagement relationship with lower case 1a, 1b. At the front end portions of the upper case 1a and the lower case 1b, the spring member 37 is detached from the shutter 3 and the cartridge case 1
Each of the protrusions 48 is formed so as to prevent the protrusions from entering therein, and the engaging recess 38 of the spring member 37 is slidably fitted therein. The ridge 48 extends in the direction of expansion and contraction of the spring member 37, as shown in FIGS. 4, 6, and 23.

FIG. 24 is a view showing a modified example of the spring member 37, and FIG. 25 is a partial sectional view showing the engagement relationship between the spring member 37 and the upper and lower cases 1a, 1b.

The spring member 37 according to this modification is formed of a coil spring,
U-shaped bent portions 49 are formed at both ends thereof, and the bent portions 49 are brought into contact with the protrusions 48 formed on the upper and lower cases 1a and 1b as shown in FIG. The spring member 37 is prevented from entering the cartridge case 1.

FIG. 26 is a view showing a further modified example of the spring member 37. Also in this example, the spring member 37 is made of a coil spring, and ring-shaped bent portions 49 are formed at both ends of the spring member 37 so that the spring member 37 can be engaged with the protrusions 48 of the upper and lower cases 1a and 1b. There is.

In the case of the spring member 37 shown in FIG. 22, the upper and lower cases 1
The spring member 37 is incorporated when combining a and 1b. In the case of the spring member 37 shown in FIGS. 25 and 26, the spring member 37 can be inserted after the upper and lower cases 1a and 1b are combined.

Next, the incorporation of the shutter 3 will be described. As shown in FIG. 4 and FIG. 6, the ridge 48 has a head insertion opening 5
It crosses the front of and extends to the vicinity of one corner. An upward inclined surface 50 that is inclined upward is formed in front of the shutter insertion position of the protrusion 48 of the upper case 1a (in front of the head insertion port 5) (see FIG. 18). Further, a downward inclined surface 51 that is inclined downward is formed in front of the shutter insertion position of the protrusion 48 in the lower case 1b (in front of the head insertion port 5) (first).
(See Figure 8). As shown in FIG. 18, when the upper case 1a and the lower case 1b are combined, an opening 52 is formed between the upper and lower ridges 48.

A width L _{1 in} the upper and lower directions of the opening 52 is larger than a thickness L _{2 in} the upper and lower directions of the columnar portion 30 of the shutter 3 and is orthogonal to the sliding direction of the shutter 3 (the upper and lower directions). direction)
Is smaller than the distance L ₃ from the tip of the upper locking claw 31 to the tip of the lower locking claw 32, that is, L ₂ <L ₁ <L ₃
Is designed to be a relationship. Further, the upper and lower widths L ₁ of the openings 52 have upper locking claws 31 in a direction orthogonal to the inclination direction of the twist promoting surface 33 shown in FIG.
It is designed to be equal to or slightly larger than the distance L ₄ from the tip of to the tip of the lower locking claw 32.

When assembling the shutter 3 into the cartridge case 1, it is not necessary to open the double-sided plate portions 26 and 27 of the shutter 3 as in the conventional case, and the cartridge insertion position of the cartridge case 1 (the upward slope 50 and the downward slope 51 are formed). It is sufficient to insert the shutter 3 as it is toward the point where it is formed. During the insertion, first, the twist promoting surface 33 formed on the upper locking claw 31 of the engaging projection 29 is formed on the upward inclined surface 50, while the twist promoting surface 33 formed on the lower locking claw 32 is formed. The downwardly inclined surfaces 51 are in contact with each other. When the shutter 3 is further inserted, the space between the upward slope 50 and the downward slope 51 is gradually narrowed.
As shown by the arrow in FIG. 13, the relatively thin columnar portion 30 is twisted and deformed by the guide of FIG.
32 passes through the opening 32. The inclined twist promoting surface 33 provided on the locking claws 31, 32 is formed so that the columnar portion 30 is easily twisted and deformed in the same direction. When it passes, the columnar portion 30 returns to its original state due to its restoring force, and as shown in FIG. 19, the locking claw 31 is the protrusion 48 of the upper case 1a and the lower locking claw 32 is the protrusion of the lower case 1b. The shutter 3 is prevented from coming off by engaging with each of the shafts 48, the columnar portion 30 is slidably arranged in the opening 52, and the assembling of the shutter 3 is completed.

FIG. 27 is a view showing a modified example of the engaging projection 29 provided on the shutter 3. In the case of this engagement protrusion 29, the planar shapes of the locking claws 31 and 32 are substantially quadrangular, and inclined twist promoting surfaces 33 are formed at the corners thereof.

FIG. 28 shows the pressing plate 13 when the disk is used.
FIG. When the disk is used, the pressing member 53, which is provided on the recording / reproducing apparatus and is made of, for example, a leaf spring.
As a result, the pressing plate 13 is lightly pressed toward the receiving portion 18 side. As a result, the magnetic disk 2 is attached to the cleaning sheet 16, 1 between the pressing plate 13 and the receiving portion 18.
The surface of the rotating magnetic disk 2 is reliably cleaned by being gently held by 6.

In the above-described embodiment, the case where the shutter 3 opens and closes only the head insertion port 5 has been described, but it is also possible to make the shutter 3 that opens and closes both the head insertion port 5 and the opening 4.

Further, in the above-mentioned embodiment, the case of the magnetic disk cartridge was explained, but the present invention is not limited to this, and can be applied to other disk cartridges such as an optical disk cartridge and an optical-magnetic disk cartridge. Is.

〔effect〕

As described above, the present invention is configured to slidably support the shutter in the cartridge case by the engagement between the engaging protrusion provided in the connecting portion of the shutter and the protrusion provided in the cartridge case. ing.

Therefore, when installing the shutter in the cartridge case, it is not necessary to force the shutter to be opened and inserted as in the conventional case, and the uncertainty of the engagement between the card case and the shutter due to the deformation accompanying the opening is eliminated. It

In addition, the engaging protrusion provided on the shutter has an upper locking claw protruding toward the inner surface of the upper case and a lower locking claw protruding toward the inner surface of the lower case. For example, even if the shutter is pulled out in the vertical direction, the protrusion of the upper case engages with the upper locking claw, and even if the shutter is pulled downward, the protrusion of the lower case engages with the lower locking claw. Get deeper.

As described above, it is possible to provide a reliable disk cartridge with which the cartridge case and the shutter are securely engaged with each other.

Further, by adopting the structure in which the shutter is incorporated into the cartridge case while twisting and deforming the columnar portion of the engaging projection as in the above-described embodiment, the workability of incorporating the shutter becomes simple.

Further, as in the above embodiment, a contact wall is formed inside the connecting portion of the shutter in a direction interlinking with the sliding direction of the shutter, and the contact wall serves as the receiving surface of the spring member. Therefore, the latch failure of the conventional spring member is eliminated.

[Brief description of drawings]

1 to 28 are for explaining a magnetic disk cartridge according to an embodiment of the present invention. FIG. 1 is a plan view when the disk cartridge is not used, and FIG. 2 is the disk cartridge. FIG. 3 is a plan view of the upper case, FIG. 4 is a bottom view of the upper case, FIG. 5 is a bottom view of the upper case with a cleaning sheet attached, and FIG. FIG. 7 is a plan view of the lower case with a cleaning sheet attached, FIG. 8 is a bottom view of the lower case, FIG. 9 is an enlarged plan view of the shutter, and FIG. Enlarged front part, FIG. 11 is an enlarged right side view of the shatter, FIG. 12 is an enlarged bottom view of the shatter, FIG. 13 is an enlarged front view of a main part of the shatter, FIG. Fig.15 Fig.14 Fig.II-
FIG. 16 is a perspective view of the pressing plate, FIG. 17 is an enlarged perspective view of the light protector, and FIGS. 18 and 19 show the state before and after inserting the shutter into the cartridge case. Partial sectional view shown, FIG. 20 is a sectional view of the molding die for the shutter, FIG. 21 is a perspective view of the spring member, and FIGS. 22 and 23 show the engagement relationship between the spring member and the upper and lower cases. Partial sectional view and partial plan view shown, FIG. 24 is a perspective view showing a modification of the spring member, and FIG.
The figure is a partial cross-sectional view showing the engagement relationship between the spring member and the upper and lower cases, FIG. 26 is a partial cross-sectional view showing a further modification of the spring member, and FIG. 27 is a modification of the engaging projection. FIG. 28 is a partially enlarged perspective view showing the above, and FIG. 28 is a sectional view of the vicinity of the pressing plate when the disc is used. FIG. 29 is an exploded perspective view of a conventional magnetic disk cartridge, and FIG. 30 is a partial cross-sectional view showing an engaging structure between the shutter of the magnetic disk cartridge and the cartridge case.
FIG. 31 is a partial cross-sectional view showing the engagement structure between the shutter of the magnetic disc cartridge and the spring. 1 ... Cartridge case, 2 ... Magnetic disk, 3 ... Shutter, 5 ... Head insertion port, 26 ... First face plate part, 27 ...
... second face plate portion, 28 ... connecting portion, 29 ... engaging projection portion, 3
0: columnar part, 31: upper locking claw, 32: lower locking claw,
33: twist promoting surface, 37: spring member, 48: ridge, 50: upward inclined surface, 51: downward inclined surface, 5
2 ... Opening.

Claims (4)

[Claims] 1. A desk cartridge including a cartridge case including an upper case and a lower case rotatably storing a disk, and a shutter for opening and closing a head access port of the cartridge case. The shutter has a face plate portion that opens and closes at least the head access opening of the cartridge case, and a connecting portion that is connected to the end portion of the face plate portion and faces the end surface of the cartridge case, and the car from the inner surface of the connecting portion. A columnar portion extending so as to be inserted into the storage case is projected at a predetermined position, and the tip side of the columnar portion projects toward the inner surface of the upper case and the inner surface of the lower case. On the other hand, an opening for allowing the columnar portion to move is provided on the end surface of the cartridge case, and the upper case near the opening is formed. Also, on the inner surface of the lower case, projections that engage with the upper locking claws and the lower locking claws are formed respectively along the moving direction of the shutter, and the engagement between the locking claws and the projections allows the shutter to be closed. A disk cart ledge which is slidably supported by a ledge case. 2. In the claim (1),
The shutter comprises a first face plate part, a second face plate part facing the first face plate part, and a connecting part for connecting the end parts of the first face plate part and the second face plate part. Disc Cartridge which has a character shape. 3. In the claim (1),
A disk cartridge which is characterized in that the entire shutter is molded of synthetic resin. 4. In the claim (1),
An upward sloping surface sloping upward is formed in front of the shutter insertion position of the upper case ridge, and a downward sloping surface sloping downward is formed in front of the shutter insertion position of the lower case projection. The columnar part of is twistable, and a twist promoting surface is respectively provided on a part of the upper locking claw facing the upward inclined surface and a part of the lower locking claw facing the downward inclined surface when the shutter is inserted. Disc Cartridge which is provided.