JPH01319190A - Disk cartridge - Google Patents

Abstract

PURPOSE:To surely execute a shutter opening action and to prevent generating an action defect at such a time by providing an extended part to block an engagement between the edge surface of a shutter and a shutter opening lever. CONSTITUTION:When a disk cartridge 1 is inserted into the disk inserting hole of a disk driver, a first shutter opening lever is engaged with an engaging groove 20, a second shutter opening lever 27 abuts on a slide-abutting part 19, and when the disk cartridge 1 is inserted further, a slider 5 is moved, and a shutter 6 is opened. At such a time, since an extended part 19b formed to the slide-abutting part 19 is formed so as to cover the shutter opening direction (M direction) front surface of the edge of the shutter 6, a tip 27a of the second shutter opening lever 27 passes without being hooked to the edge of the shutter 6. In such a way, even when the shutter opening lever 27 is unlocked, the lock of the shutter 6 and the defects of a shutter opening action and a loading action cannot be generated.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a disc cartridge that is provided with a shutter for opening and closing a head window and that stores an information recording disc therein. [Prior Art] An information recording disk housed in a cartridge case is attached to a disk drive device, and information is recorded and re-recorded by magnetic means or optical means.A disk cartridge has a disk cartridge for rotationally driving the information recording disk. A window hole is formed into which a spindle and a head for recording or reproducing information on the information recording disk are inserted. Therefore, if the above-mentioned window hole is always open, dust may adhere to the information recording disk when it is not in use, or fingers or foreign objects may come into contact with the information recording disk during handling, staining or damaging the surface of the information recording disk. There is a risk of damage. In order to prevent such accidents, disk cartridges are conventionally known that are equipped with a shutter that closes the window hole when not in use. An example of this is shown in FIG. FIG. 9 is a perspective view showing the overall shape of a general optical disc cartridge. In the figure, a disk cartridge 1 includes a cartridge case (hereinafter further referred to as a case) 4 made of synthetic resin and consisting of an upper case 2 and a lower case 3.
and a shack 6 integrally attached to the slider 5,
It mainly consists of an optical disc 7 as an information recording disc rotatably housed in a case 4. A head window 8 into which a head and a spindle (not shown) are inserted is opened at preset locations in the upper case 2 and lower case 3, and an edge 9 on the insertion side X into the disk drive device is opened.
, there is a guide 1 for guiding the slider 5 along its edge 9.
1110 is formed. In addition, light protector holes 11 and 1 are provided in the upper case 2 and lower case 3 (not shown).
2 and positioning holes 13.14 are opened, and the write protector 15.16 is exposed from the write protector hole ratio 12. As shown in the perspective view of FIG. 10, the slider 5 is formed into a substantially columnar shape, and has a projection 2d shown in FIG. A guide engagement groove 18 is provided. This slider 5
In the same figure, the top surface, the side, and the shutter opening direction (
In the direction of arrow M), there is a sliding contact part 19 on which the tip of a second shutter release lever 27 (described later) slides on the performance side end, and on the downstream side, the tip of a first shutter release lever 26 engages. Engagement portions 21 each having an engagement groove 20 are formed. A mounting portion 22 for the shutter 6 is formed one step lower between the sliding contact portion 19 and the engaging portion 21, and a mounting hole 24 for mounting the shutter is bored in the center thereof. The shaft 6 is made by bending a thin wall of stainless steel to have a U-shaped cross section, and is fixed to the mounting portion 22 via screws 23. Further, the slider 5 is moved along the guide groove 10 to the shutter 6.
The head window is slidable between a closed position and an open position, and is always elastically biased in the closed direction (direction of arrow C) by a separately provided tension spring 25. In the disk cartridge 1 roughly configured as described above, when the disk cartridge 1 is inserted into the disk drive device and loaded, the tip of the first shutter release lever 26 is engaged with the slider 5 as shown in FIG. The second shutter release lever 27 enters the engagement groove 20 and engages with the engagement groove 2o, and the tip of the second shutter release lever 27 comes into contact with the surface of the sliding contact portion 19. When the disk cartridge 1 is further pushed into the disk drive from this state, the first shutter release lever 26 is moved to the arrow E.
, the second shutter release lever 27 rotates in the direction of arrow F, and the slider 5 and shutter 6 are opened in the direction of arrow G by the first shutter release lever 26. At this time, the tip @27a of the second shutter release lever 27 slides on the surface of the sliding contact part 19, climbs over this sliding contact part 19, moves to the upper surface side of the end plate 6a of the shutter 6, and moves to the upper surface side of the end plate 6a of the shutter 6. is the open side (
It is intended not to become an obstacle when moving in the direction of arrow G). In addition, when closing the shutter 6, when the disk cartridge l is retreated from the disk drive device side, the first release lever 26 rotates in the direction of the arrow H in the opposite direction from when it was inserted.
Along with this, the shutter 6 moves in the direction of arrow J, that is, in the closing direction, and the shutter 6 is closed. At this time, the second
The shutter release lever 27 also rotates in the opposite direction to when it was pushed in, that is, in the direction of the arrow, and returns to the initial position by climbing over the sliding contact portion 19 from the opposite direction. The reason why two shutter release levers 26 and 27 are provided in this way is because it is assumed that the disc 7 has double-sided recording, and the disc is driven with the back side B facing up instead of the A side shown in FIG. When loading the device, the relationship between the two is reversed, and the second shutter release lever 27 engages with the engagement groove 21, and the first shutter release lever 26 comes into sliding contact with the sliding contact portion 19. Become. [Problems to be Solved by the Invention] In the conventional example configured and operated as described above, as shown in FIG. 12, which is a front view of the main part of the disk cartridge 1, the width W of the sliding contact portion 19. However, the groove width W of the guide groove 10 formed by the upper case 2 and the lower case 3 is set to be slightly narrower, so that the slider 5 can slide smoothly in the guide groove 10. However, as shown in the explanatory diagram taken along line D-D in FIG. 12 in FIG.
7 comes off the surface of the sliding contact portion 19, and the side walls 2a, 3 of the upper case 2 and lower case 3 form the guide groove 10.
It may shift to either side of a. In this way, for example, if the second shutter release lever 27 is shifted toward the side wall 2a, it will come into sliding contact with the end surface 2b of the side wall 2a, but the end W6a of the shutter 6 will move toward the slider 5 so as to cover the end surface 2b. As shown in FIG. 14, when the disk cartridge l is inserted to a certain depth, the second shutter release lever 27 is attached to the end surface (hereinafter referred to as an edge) of the end plate 6a of the shutter 6.
6b. As a result, the second shutter release lever 27 obstructs the movement of the shutter 6, and the shutter 6 becomes locked. When the shutter 6 is in a locked state, the force for opening the shutter 6 increases, which impairs the feeling of use or makes it impossible to open the shutter 6. Furthermore, if the shutter 6 is made of metal as in this example, and the shutter release levers 26 and 27 are made of resin (actually, most of them are made of resin), the shutter 6
The edges 6b may cause wear and malfunction. The present invention has been made in view of the actual state of the prior art as described above, and its purpose is to provide a disc that ensures that the shutter is opened when a disc cartridge is inserted, and that does not impair the usability or cause malfunction. The purpose is to provide cartridges.

[Means to solve the problem]

The above-mentioned problems include a cartridge case in which a head window is formed on at least one side, a disk-shaped recording medium rotatably housed in the cartridge case, and an end surface of the cartridge case on the insertion side into a disk drive device. A slider that is slidably disposed along a guide groove and has an engagement groove with which the tip of one shutter release lever engages, and a slider that straddles at least one side wall of the cartridge case forming the guide groove and is integrated with the slider. In a disk cartridge equipped with a shutter that opens and closes a head window by sliding on the slider, an end face of a shutter portion that straddles the side wall is provided at an upstream end in the shutter opening direction opposite to the engaging groove forming portion of the slider. This problem is solved by forming an extension that prevents engagement with the other shutter release lever. [Operation] According to the above means, when one shutter release lever engages with the engagement groove to open the shutter, the other shutter release lever slides into contact with the upstream end of the slider in the shutter opening direction. , its tip moves to the shutter shutter closing side, but at this time, the end surface of the shutter, which was conventionally exposed on the upper end surface of the side wall of the guide groove, is covered by the extension formed on the slider, so that the other side The tip of the shutter release lever is not engaged, so there is no possibility that the other shutter release lever will interfere with the shutter opening operation. [Example] Hereinafter, an example of the present invention will be described based on the drawings. In the following description, the same reference numerals are given to constituent elements that are or can be considered to be the same as those of the conventional example shown in FIGS. 9 to 14, and redundant explanations will be omitted as appropriate. FIG. 1 is a perspective view of a slider 5 according to the first embodiment. In the figure, the sliding contact portion 19 of the slider 5 is shown in FIG.
As shown in FIG. 4, which is a sectional view taken along the line A-A, the extending portion 19b is tapered to widen toward the downstream side in the shutter opening direction (direction of arrow M). Accordingly, as shown in the exploded perspective view of the main part of the guide groove 10 in FIG. 2, if the thickness Vi on the top side of the side walls 2a and 3a is t9, and the plate thickness on the bottom side is t, then 1. <1. The inclined surface 2c. 3C is formed and slides in correspondence with the tapered surface 19a on the side surface of the sliding contact portion 19. That is, if the width of the sliding contact portion on the most downstream side in the shutter opening direction (arrow M direction) of the sliding contact portion 19 is WA, and the width of the sliding contact portion on the most upstream side is W, then wa
>Wl is formed, thereby A-A
The extending portion 19b in the 'vA cross section also has a width of WA on the upper surface side.
, a taper having a width Wl on the bottom side is formed. Also, the width W
A is arbitrarily chosen to have dimensions 0 < Wa − Wi < 2 t t . In addition, the inclined surface 2c (3c)
Below is a protrusion 2d (3d) which is engaged with the guide engagement groove 18 and which regulates the positioning of the slider 5 and the sliding enclosure.
is formed. All of the parts of the pond that are not specifically explained are constructed in the same manner as in the conventional example, so explanations regarding these parts will be omitted. Next, the operation of the first embodiment configured as described above will be explained. First, the disk cartridge 1 is inserted into the disk insertion hole of the disk drive device. Then, when the shutter is inserted to a predetermined depth, the first shutter release lever 26 engages with the engagement groove 2o, and the second shutter release lever 27 comes into contact with the sliding contact portion 19, as shown in FIG. When the disk cartridge 1 is further inserted from this state, the slider 5 moves as described above, and the shutter 6 is opened. At that time, as explained with reference to FIG. 13 above, even if the second shutter release lever 27 deviates from its normal position and reaches the end surface 2b of the side wall 2, as shown in FIG. As shown, the extending portion 19b formed on the sliding contact portion 19 is formed to cover the front surface of the edge 6b of the shutter 6 in the shutter opening direction (direction of arrow M). The height h2 from the end surfaces 2b, 3b to the top surface of the extending portion 19b of the sliding contact portion 19 on the most downstream side in the shutter opening direction is greater than the height hl from the end surfaces 2b, 3b of the shutter 6 to the top surface of the edge 6b of the shutter 6. High (setting), the tip 27 of the second shutter release lever 27 as shown in the same figure and FIG.
a passes through the edge 6b of the shutter 6 without being caught. In this way, even if the shutter release lever 27 (26
) is displaced, the distal end thereof is prevented from engaging with the edge 6b, and there is no risk of locking of the shutter 6 or failure of the shutter opening operation and loading operation. Furthermore, a second embodiment is shown in FIGS. 6 to 8, FIG. 6 is a perspective view of the slider 5 according to this embodiment, and
J is a front view of essential parts of the disk cartridge 1, and FIG. 8 is an explanatory view taken along line BB in FIG. 7. The slider 5 according to the second embodiment extends on the end surfaces 2b and 3b of the sides Q2a and 3a as shown in FIGS. 7 and 8 on both sides of the sliding contact portion 19 on the most downstream side in the shutter opening direction. It is provided with an extending portion 19c that can be extended. The extending portion 19c has a width WA larger than the width W8 on the bottom side and less than or equal to the width W0 of the disk cartridge. Part 1
The upper surface of the shutter 9 is formed to be higher than the upper surface of the edge 6b of the shutter 6. Other parts not described are all configured in the same manner as in the conventional example. With the above configuration, the shutter release lever 27 (2
6) is displaced, the extension portion 19 is moved as shown in FIG.
c, and the shutter release lever 27 (26) will not get caught on the edge 6b of the shutter 6. Therefore, in this case as well, there is no possibility that the shutter 6 cannot be opened or that a malfunction occurs during the shutter opening operation 9. In addition, in the above two embodiments, the extending portion 19b119c
The sliding contact portion 19 is formed in a tapered shape with expanded width and height, or is formed so as to protrude from the side, but in short, the edge 6b of the shutter 6 at the tip of the shutter release lever 26° 27 It goes without saying that the extending parts 19b and 19c are not limited to the above two forms, as it is sufficient that the sliding contact part 19 is extended in a shape that avoids engagement with the sliding contact part 19. [Effects of the Invention] As is clear from the above description, this invention provides an extending portion at the end of the slider on the upstream side during the shutter opening operation to prevent engagement between the end face of the shutter and the shutter release lever. According to the above, since the shutter release lever does not get caught on the shutter end face and obstruct the shutter operation, the shutter release operation can be performed reliably.
There is no risk of malfunction or damage to the windows.

[Brief explanation of the drawing]

1 to 5 are for explaining the first embodiment of the present invention. FIG. 1 is a perspective view of the slider, FIG. 2 is a perspective view of the main part of the guide groove, and FIG. 3 is a perspective view of the slider. Front view of the main parts of the disk cartridge showing the slider and shutter mounting parts, No. 4
The figure is an explanatory diagram of the operation in a cross-section at the A-A gland in Figure 3, and Figure 5.
The figure is an explanatory view of the operation showing the relationship between the sliding contact part of the slider and the shutter release lever. Figures 6 to 8 are for explaining the second embodiment. Figure 6 is a perspective view of the slider, and Figure 6 is a perspective view of the slider. 7
The figure is a front view of the main parts of the disk cartridge showing the mounting part of the slider and shutter, Figure 8 is an explanatory diagram of the operation in a cross-sectional state taken along the line B-B in Figure 7, and Figures 9 to 14 explain the conventional example. Figure 9 is a perspective view of the disk cartridge, Figure 10 is a perspective view of the slider, Figure 11 is an explanatory diagram showing the shutter opening operation, and Figure 12 shows the mounting portion of the slider and shutter. FIG. 13 is a front view of the disk cartridge, FIG. 13 is an explanatory diagram of the operation in a cross-sectional state taken along the line D--D in FIG. 12, and FIG. 14 is an explanatory diagram of the operation showing a state in which the shutter release lever is caught on the edge of the shutter. 1...Disc cartridge, 2...
......Top case, 3...Bottom case, 2a, 3a...Side wall, 4...
...(cartridge) case, 5...
Slider, 6...Shutter, 7...
...Information recording discs 2, 8...
Head window, 10... Guide groove, 19
......Sliding contact part, 19b, 19c...
...Extension portion, 20...Engagement groove, 26
．． 27.......Shutter release lever. Figure 1 Figure 3 Figure 4 Figure 6 Figure 7 Figure 8 Figure 9 Figure 1Q Figure 1I Figure 12 Figure 13

Claims (4)

[Claims] (1) A cartridge case consisting of an upper case and a lower case and having a head window formed on at least one side;
A disk-shaped recording medium is rotatably housed in a cartridge case, and one shutter release lever is slidably arranged along a guide groove formed on the end surface of the cartridge case on the insertion side into the disk drive device. A disk cartridge comprising: a slider having an engagement groove with which the tip of the slider engages; and a shutter that straddles at least one side wall of a cartridge case forming a guide groove and slides integrally with the slider to open and close a head window. , a disk characterized in that an extending portion is formed at the end of the slider on the upstream side during the shutter opening operation to prevent the end face of the shutter portion that straddles the side wall from engaging with the other shutter release lever. cartridge. (2) The disk cartridge according to claim 1, wherein the extending portion is formed to extend onto an end surface of a side wall of the cartridge case. (3) A taper is formed on the side wall so that the open side of the guide groove is wider than the closed side, and the extending portion corresponds to the taper of the side wall, so that the side facing the shutter opening/closing lever has a wider cross-sectional shape than the non-opposing side. A claim characterized in that it is formed (
1) Disk cartridge described. (4) The disk cartridge according to claim (1), wherein the projecting height on the side wall of the extending portion is greater than the projecting height on the side wall of the shutter end face.