JP2554171Y2 - 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 in which a flexible disk, a hard disk, and particularly an optical disk is rotatably housed in a case.

[0002]

2. Description of the Related Art Generally, a flexible disk, an optical disk or a magneto-optical disk as an information recording carrier is used as a disk cartridge housed in a case, which is set in a recording / reproducing apparatus. Conventional discs of this type are susceptible to dust and dirt during handling, and are particularly susceptible to damage. In addition, the disc is housed in a case because of the large influence of temperature changes, and a pickup insertion hole and a drive shaft provided in the case are provided. It is known to have a slide shutter that opens and closes an insertion hole when a disc is used or not used. However, when recording / reproducing data on an optical disk or the like, if one or more pickup insertion holes are provided, a plurality of window holes and a drive shaft insertion hole are used or not used to protect the disk from dust and the like. Sometimes a shutter that opens and closes is necessary. However, in order to open and close these window holes, there is a problem that the entire disk cartridge becomes large with a single sliding shutter in one direction, so a rotary shutter is provided. It is possible.

[0003]

However, in the conventional rotary shutter, the amount of movement on the outer peripheral side is larger than that on the inner peripheral side at a fixed rotation angle. In the rotary shutter in which the flat plate portion of the shutter covering the pickup insertion hole has the same shape as the pickup insertion hole, there is a problem that the pickup insertion hole of the case cannot be opened or covered with a slight rotation angle deviation. The present invention seeks to eliminate these disadvantages accurately, and even if the disk cartridge has one or more pickup insertion holes in the case containing the disk, the insertion holes can be opened and closed accurately and dust and dirt can be removed. The purpose is to provide a disk cartridge of high commercial value that can prevent intrusion, properly open or cover even if the rotation angle is misaligned, smoothly and stably operate the shutter interlocking operation, and can be stored extremely compactly and safely. It is.

[0004]

According to the present invention, a disk is rotatably accommodated in a case, and a rotary shutter for opening and closing a pickup insertion hole formed in the case is rotatable about a drive shaft insertion hole. In the deployed disk cartridge, a window having an area including the area of the pickup insertion hole is formed in the rotary shutter, and a difference in a peripheral width between an outer peripheral edge of the pickup insertion hole and the window is determined by the window. The outer peripheral side is made larger than the inner peripheral side of the hole (claim 1 or claim 2), or the disc is rotatably stored in the case, and the pickup insertion hole overlaps with the pickup insertion hole formed in the case. In a disk cartridge in which a rotary shutter having a flat plate portion that opens and closes is rotatably provided around a drive shaft insertion hole, The circumferential width difference of the outer circumferential edge of the insertion hole and the flat plate portion, a disk cartridge being characterized in that a larger outer periphery than the inner periphery of said plate (claim 3). In the present invention, when the disc cartridge is set in the recording / reproducing apparatus, the rotary shutter is rotated about the drive shaft insertion hole, and the pickup insertion hole is opened and closed. When the rotation angle of the rotary shutter is shifted, the position shift of the rotary shutter with respect to the pickup insertion hole is larger on the outer peripheral side than on the inner peripheral side, but the invention according to claim 1 or 2. In this case, the difference between the outer peripheral edge of the pickup insertion hole and the outer peripheral edge of the window hole is larger on the outer peripheral side than on the inner peripheral side of the window hole. You can open it. In the invention according to the third aspect, the peripheral width difference between the outer peripheral edge of the pickup insertion hole and the flat plate portion is made larger on the outer circumferential side than on the inner circumferential side of the flat plate portion. The pickup insertion hole can be reliably covered.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 and 2. A disc 1 is rotatably housed in a case 1 consisting of an upper case and a lower case. A rotary shutter 7 having two drive shaft insertion holes 4 and a window hole 6 having a region including the region of the pickup insertion holes 3 at positions corresponding to the plurality of pickup insertion holes 3 is provided. together rotatably provided around the disc holder 2 in 4, and the center of the rotary shutter 7 with a pivot point 5 ₁ having a center to another remote location, to open and close the driving shaft insertion hole 4 A revolving shutter 5 is provided on the case 1 so as to be revolvable. The revolving shutter 7 and the revolving shutter 5 are engaged with a cam mechanism, for example, a cam groove 8 and an engaging shaft 9 so as to be interlocked. Shout The spring 13 for urging the motor in a closing direction and an open position holding, pivoting shutter 5 to its one end engaging the shaft 9 of the cam mechanism and the other end in the vicinity of the pivot point 5 ₁ of the revolving shutter 5 Is mounted on the case inner wall 12 at substantially the same distance from both the open position and the closed position,
In addition, a disk holder 2 serving as a support shaft of the rotary shutter 7 and regulating the respective height positions of the rotary shutter 7 and the revolving shutter 5 is provided inside the case near the drive shaft insertion hole 4. As a disc cartridge. In the present invention, the difference in the peripheral width of the outer peripheral edge between the pickup insertion hole 3 and the window hole 6 is made larger on the outer peripheral side than on the inner peripheral side of the window hole 6.

In this embodiment, the pickup insertion hole 3
Is a substantially oval shape having a constant width in the radial direction of the case 1. The rotary shutter 7 is made of a circular flat plate, and is radially spaced around the drive shaft insertion hole 4 at a plurality of intervals. A window hole 6 is arranged, and a circumferential width difference between an outer peripheral edge of the pickup insertion hole 3 and the window hole 6 is gradually increased from an inner peripheral side to an outer peripheral side of the window hole 6. The peripheral width of the window hole 6 is increased from the inner peripheral side to the outer peripheral side. Further, the inner surface of the case in which the pivoting shutter 5 is moved Yes to form a concave surface 1 _1, further examples of the shutter 5 and 7, have been polymerized deployed on the inner surface of the case 1, respectively, freely interlocked with each connecting member And a revolving shutter 5 for opening and closing the drive shaft insertion hole 4 is provided with an engaging shaft 9 fitted in a cam groove 8 formed in the revolving shutter 7.
It is practical to connect to the cam groove 8 and the engagement shaft 9.
May be reversed.

The rotary shutter 7 is biased by a spring (not shown), and is connected to a slider 10 sliding on the outer peripheral end of the case by a connecting member 11 to rotate. . Further, it is preferable to use a shutter for opening and closing the notch in the detection hole and the disc holder 2 as the revolving shutter 5, and in any case, the revolving shutter 5 provided in the case 1 and the rotary shutter 7 are interlocked. The cam mechanism that interlocks the shutters 5 and 7 pivots a cam groove 8 formed in the rotary shutter 7 and an engagement shaft 9 that slides in the cam groove 8. The spring 13 is mounted at a position where the groove direction of the cam groove 8 is substantially equal to the biasing direction of the spring 13 (substantially linear position) at the shutter open position. Good. The connecting member may be configured such that one of the shutters or the connecting member is provided with a convex portion, the corresponding member is provided with a concave portion or a hole portion, and the two concave / convex portions are engaged to interlock the two shutters. Alternatively, the two shutters 5 and 7 can be interlocked with each other directly so that they can be interlocked with each other, or an interlocking mechanism can be selected in which the sliders are interposed between the two shutters so as to be unevenly interlocked. In the figure, 14 is a detection hole, 15 is a notch, 16 is a cam groove, and 17 is a center hole.

In this embodiment, when the disk cartridge is set in the recording / reproducing apparatus, the slider 1
0 moves rotating shutter 7 is rotated around the disc holder 2 in the drive shaft insertion hole 4, since the pivot shutter 5 In conjunction with this pivoting movement about a hinged portion 5 _1, the case 1 The plurality of pickup insertion holes 3 and the drive shaft insertion holes 4 provided are held at the open position and can be properly opened even if there is a slight deviation in the rotation angle (FIG. 1B). On the other hand, when taking out the cartridge from the recording / reproducing apparatus, the revolving shutter 5 and the rotary shutter 7 are moved in the closing direction to close the respective insertion holes 3 and 4 (FIG. 1A), and the engagement of the two shutters is performed. Even if there is a cam mechanism at the joint, the rotary shutter 5 is urged by the spring 13 so that
The shutter can be opened and closed smoothly without any swinging phenomenon, the hole in the case can always be kept open properly even if the rotation angle is misaligned, and the recording surface of the disc is not rubbed and there is no damage. The disk can be used safely by preventing the occurrence and the disk can be safely kept in the case even during storage and handling.

Examples of [0009] Figure 3 is for a rotary shutter 7 having a flat plate portion ₇₁ which covers overlapping the pickup insertion hole 3 provided rotatably around a drive shaft insertion hole 4, a pickup insertion hole 3 the circumferential width difference of the outer circumferential edge of the flat plate portion ₇₁ has a larger outer periphery than the inner periphery of said plate _71.
In this embodiment, the pickup insertion hole 3 is of a shape substantially oval having a constant width in the radial direction of FIG. 1 in the same manner as in case 1, toward the outer side of the circumferential width flat plate portion ₇₁ from the inner peripheral side And make it bigger. Thus, even if the rotary shutter 7 has a slight rotation angle deviation, the pickup insertion hole 3 can be covered properly. Figure 7 ₂ is provided on the rotary shutter 7 in the guide piece. 14 is a detection hole, 15 is a notch, 18
Is a curved groove, 19 is a straight groove, and 20 is a leaf spring.

[0010]

According to the present invention, a disk cartridge is provided in which a disk is rotatably housed in a case, and a rotary shutter for opening and closing a pickup insertion hole formed in the case is rotatably provided around a drive shaft insertion hole. In the above, a window having a region including the region of the pickup insertion hole is formed in the rotary shutter, and a difference in peripheral width between an outer peripheral edge of the pickup insertion hole and the window is determined by an inner periphery of the window. (1) or (2) a flat plate portion for rotatably storing a disk in a case and overlapping the pickup insertion hole formed in the case to open and close the pickup insertion hole. A disk cartridge in which a rotary shutter having a rotary shaft is provided rotatably about a drive shaft insertion hole, wherein the pickup insertion hole and the The circumferential width difference of the outer circumferential edge of the plate portion, it has a large outer peripheral side from the inner circumferential side of said plate (claim 3)
As a result, even if the rotary shutter is slightly deviated in the rotation angle, the pickup insertion hole of the case is completely opened or covered, so that there is no trouble in recording / reproducing, and there is no influence on the recording surface portion and the safety is secured. In addition to being used in the case, the disk in the case is not easily rubbed, damage such as hitting or nicking does not easily occur, and even if the shutter opens and closes a plurality of windows, the entire disk cartridge is extremely compact without becoming large. It has the effect of maintaining high quality for a long time, has a simple structure, can be provided at low cost, and has practical benefits such as easy handling.

[Brief description of the drawings]

FIG. 1 is a plan view of a lower case showing an operation state of an embodiment of the present invention, wherein (A) is a plan view when a shutter is closed,
(B) is a plan view when the shutter is open.

FIG. 2 is a perspective view of a lower case in a separated state.

FIG. 3 is a plan view of a lower case showing an operation state of another embodiment of the present invention, showing a shutter opened.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Case 2 Disc holder 3 Pickup insertion hole 4 Drive shaft insertion hole 5 Revolving shutter 5 ₁ Pivot part 6 Window hole 7 Rotary shutter 7 ₁ Shutter flat plate part 8 Cam groove 9 Engagement shaft 10 Slider 11 Connecting member 12 Case inner wall 13 Spring

Claims (3)

(57) [Scope of request for utility model registration] 1. A disk cartridge in which a disk is rotatably housed in a case and a rotary shutter for opening and closing a pickup insertion hole formed in the case is rotatably provided around a drive shaft insertion hole. A window having a region including the region of the insertion hole is formed in the rotary shutter, and a difference in peripheral width between an outer peripheral edge of the pickup insertion hole and the window hole is set to an outer peripheral side from an inner peripheral side of the window hole. A disk cartridge characterized by having a larger size. 2. The rotary shutter according to claim 1, wherein the rotary shutter is formed of a circular flat plate, and the window holes are arranged at a plurality of intervals radially around the drive shaft insertion hole. 2. The disk cartridge according to claim 1, wherein a difference in peripheral width between the hole and the outer peripheral edge is gradually increased from an inner peripheral side to an outer peripheral side of the window hole. 3. A rotary shutter having a flat plate portion for rotatably storing a disc in a case and opening and closing the pickup insertion hole by overlapping with the pickup insertion hole formed in the case is rotated around the drive shaft insertion hole. A disk cartridge movably disposed, wherein a difference in peripheral width between an outer peripheral edge of the pickup insertion hole and the flat plate portion is larger on an outer circumferential side than on an inner circumferential side of the flat plate portion.