JP3615341B2 - Disc cartridge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk cartridge, and more particularly to a structure of a slider and a half shell for fixing a shutter for opening and closing a head insertion hole and a spindle insertion hole provided in the disk cartridge.
[0002]
[Prior art]
In general, a disk cartridge in which a disk-shaped information recording medium such as an optical disk is rotatably accommodated in a cartridge case is used as an information recording medium for a recording / reproducing apparatus such as a floppy disk device. A cartridge case of the disk cartridge is formed with a head insertion hole into which a head for reading and writing information of a recording / reproducing apparatus is inserted, and a spindle insertion hole into which a driving spindle for rotating a disk-shaped information recording medium is inserted. A shutter for opening and closing the head insertion hole and the spindle insertion hole is attached. This shutter has a substantially U-shaped cross section, is fixed to a slider, and is slidably attached along one side edge of the cartridge case. The slider is an elastic member that biases in one direction, and is held at a position where the head insertion hole and the spindle insertion hole are closed when not in use.
[0003]
A torsion coil spring is generally used for the elastic member, and one end engaging portion of the torsion coil spring is inserted into an insertion hole having a split groove formed at an end portion on the opening direction side of the main body portion of the slider. In addition, the end engaging portion is engaged with a window portion formed at the inner end of the insertion hole. Further, the other end engaging portion of the torsion coil spring is engaged with an engaging groove provided inside the cartridge case. As described above, the engaging portions at both ends of the torsion coil spring engage with the window formed on the slider and the engaging groove formed on the inner side of the cartridge case, so that the shutter fixed to the slider and the slider is released. The head insertion hole and the spindle insertion hole are held at a position where the head insertion hole and the spindle insertion hole are closed when not used.
[0004]
Further, the slider for opening and closing the shutter at the end in the closing direction of the main body of the slider, the engaging protrusion for engaging with the opening and closing pin of the playback device, and the disc-shaped information recording medium side of the end in the closing direction. A protrusion protruding through the leg is formed, and the engagement protrusion and a rail-like support protrusion that supports the protrusion are formed at positions that support the engagement protrusion and the protrusion on the half shell side. As a result, the slider and the shutter fixed to the slider are prevented from coming off above one side edge of the cartridge case. In addition, there is a substantially U-shaped wall that forms an insertion hole having a split groove at the end of the slider body in the opening direction, and the free ends of the two opposing walls of the substantially U-shaped wall. A protruding portion that protrudes through the leg portion is formed on the disc-shaped information recording medium side of the portion, and the concave guide groove that fits into the protruding portion and the rail-shaped convex protrusion that constitutes the concave guide groove are half It is formed at a position facing the protruding part inside the shell, so that the slider and the shutter fixed to the slider are guided so as to be slidable in the opening and closing direction and are prevented from coming off above one side edge of the cartridge case. doing.
[0005]
By the way, the substantially U-shaped wall forming the insertion hole having the split groove provided in the opening direction side end of the main body of the slider has an end engaging portion of the torsion coil spring formed in an L shape. An insertion hole to be inserted is formed, and one of two opposing walls of the substantially U-shaped wall is connected to the insertion hole and engaged with an L-shaped end engaging portion of the torsion coil spring. A window portion is formed, and one wall on which the window portion is formed has a structure shown in FIG. 11 that is thinner than another wall at a position facing the one wall. This is provided in the center of the slider so that the split groove can pass through the arm portion of the torsion coil spring and the biased force of the torsion coil spring is not applied to the slider, and is formed in an L shape. This is because the insertion hole into which the end engaging portion of the torsion coil spring is inserted is configured to include this split groove.
[0006]
However, as described above, one of the two opposing walls of the substantially U-shaped wall that forms the insertion hole having the split groove provided in the opening direction side end portion of the slider main body portion is the one on the side having the window portion. Although the wall thickness is thin, there is no problem in normal use, but when a shock such as a drop is applied to the disk cartridge, the disk-shaped information on the free end of this thin wall There is a problem that an abnormal load is applied to the leg portion and the protruding portion that are formed to be connected to the recording medium side, and the frequency is very low, but the free end portion of the thin wall and the connecting portion of the leg portion are broken. Occur.
[0007]
[Problems to be solved by the invention]
Accordingly, the present invention has been made to solve the above-described problems, and the object of the present invention is to open the slider body in the opening direction even when an impact such as dropping is applied to the disk cartridge. The free end of one thin wall of the two opposing walls of the substantially U-shaped wall that forms the insertion hole having the split groove provided at the end is connected to the disc-shaped information recording medium side. An object of the present invention is to provide a disc cartridge in which the formed leg portion and protruding portion are not broken at the connecting portion.
[0008]
[Means for Solving the Problems]
As a result of various studies to solve the above-described problems, the present inventor has housed a disk-shaped information recording medium therein, and inserted a head for reading and writing information of a recording / reproducing apparatus. A pair of upper and lower half shells having a hole and a spindle insertion hole into which a spindle for driving the recording / reproducing apparatus for rotating the disc-shaped information recording medium is inserted, and along one side edge of the half shell A slider provided so as to be slidable, an elastic member that urges the slider in one direction, and fixed to the slider to open and close the head insertion hole and the spindle insertion hole, and has a substantially U-shaped cross section. In a disk cartridge comprising a shutter, the slider is a recording for opening and closing the shutter at the end in the longitudinal direction of the main body, An engaging protrusion that engages with the open / close pin of the raw device and a protruding portion that protrudes through the leg portion toward the disc-shaped information recording medium side at the end in the closing direction are formed. An insertion hole having a split groove through which an arm engaging portion of the elastic member connected to the end engaging portion can be inserted and an end engaging portion of the elastic member inserted into an end portion on the opening direction side. A projecting portion projecting through a leg portion is formed on the disk-shaped information recording medium side of each free end of each of the two opposing walls of the substantially U-shaped wall; The connecting portion between the free end portion of the wall on the side where the one insertion hole is formed and the leg portion is overlaid, and the slider-like protrusion of the rail-like protrusion provided on the half shell side Chamfering is applied according to the shape of the raised part on the part opposite to the raised part. It is is found to be means for solving the above problems, in which the present invention has been completed.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The above-described present invention will be described in more detail below with reference to the drawings.
First, the slider of the disk cartridge of the present invention will be described with reference to the drawings. FIG. 1 is a view of the disk cartridge of the present invention viewed from the front side, FIG. 2 is a plan view of the inside of the half shell 4 of FIG. 4 is a side view showing an embodiment of the slider of the disk cartridge of the present invention, FIG. 4 is a view seen from the upper side (on the drawing) of FIG. 3, FIG. 5 is a view seen from the lower side (on the drawing) in FIG. Is a view from the left side (on the drawing) of FIG. 3, FIG. 7 is a view showing the first embodiment from the right side (on the drawing) of FIG. 3, and FIG. 8 is a view from the right side (on the drawing) of FIG. FIG. 9 is a sectional view taken along line XX of FIG. 1 showing the first embodiment of the present invention, and FIG. 10 is a sectional view of FIG. 1 showing the second embodiment of the present invention. FIG. 1 is a cross-sectional view taken along line XX, in which 1 is a disk cartridge, 2 is a cartridge case, 3 is one side edge, Half-shell, 4a is a rail-shaped support protrusion, 4b and 5b are concave guide grooves, 4c and 5c are rail-shaped protrusions, 4d is an engagement groove, 6 is a disk-shaped information recording medium, 6a is a hub, 7 Is a head insertion hole, 8 is a shutter, 9 is a window, 10 is a slider, 10a is a slider body, 11 is an engaging projection, 12, 13, and 14 are protrusions, 12a, 13a, and 14a are legs, 15 and 15 'are built-up portions, 16 and 16' are chamfered portions, 20 is a torsion coil spring, 30 is a split groove, 40 is an insertion hole, 41 and 42 are two walls facing the insertion hole, and P is an opening / closing pin. Show.
[0010]
FIG. 1 is a view of a disk cartridge of the present invention as viewed from the front side. The disk cartridge 1 is used as a disk-shaped information recording medium of a recording / reproducing apparatus such as a floppy disk apparatus and is opposed to each other. A disc-shaped information recording medium 6 is rotatably accommodated in a cartridge case 2 formed by a pair of upper and lower synthetic resin half shells 4 and 5 (not shown). A spindle for driving a recording / reproducing apparatus that holds and rotates a head insertion hole 7 into which a head for reading and writing information is inserted and a hub 6a provided at the center of the disc-shaped information recording medium 6 is inserted. A spindle insertion hole (not shown) is formed.
[0011]
The cartridge case 2 is provided with a shutter 8 having a substantially U-shaped cross section that opens and closes a head insertion hole 7 and a spindle insertion hole (not shown). The shutter 8 is fixed to a slider 10 slidably provided along one side edge 3 of the cartridge case 2. The slider 10 is always elastically biased in one direction by a torsion coil spring 20 that is an elastic member. When the slider 10 is not in use, the shutter 8 opens the head insertion hole 7 and a spindle insertion hole (not shown). It is configured to cover. In use, the opening / closing pin P pushes the engaging protrusion 11 provided on the main body 10a of the slider 10, so that the slider 10 and the shutter 8 attached to the slider 10 move from right to left in FIG. The shutter 8 is configured to open the head insertion hole 7 and the spindle insertion hole (not shown).
[0012]
FIG. 2 is a plan view of the inside of the half shell 4 of FIG. 1, and is provided on the side edge 3 side of the cartridge case 2 at the end in the closing direction of the main body 10a of the slider 10 (shown in FIGS. 3 to 8). A rail-like support protrusion 4a is formed to support the engaging protrusion 11 and the protrusion 12 provided through the leg 12a at the end in the closing direction of the main body 10a. The fixed shutter 8 is slidably supported by the rail-like support projection 4a, and prevents the cartridge case 2 from moving upward in FIG. 2 and entering the disc-shaped information recording medium side. It is preventing.
[0013]
Further, the two opposing walls 41, 42 of the substantially U-shaped wall forming the insertion hole 40 having the split groove 30 at the opening direction side end of the main body 10a of the slider 10 (shown in FIGS. 3 to 8) are free. Concave guide grooves 4b and 5b (not shown) that fit into the projecting portions 13 and 14 projecting through the leg portions 13a and 14a on the side of the disc-shaped information recording medium and the concave guide grooves are formed. Rail-shaped convex protrusions 4c and 5c (not shown) are formed, and thereby the slider 10 (shown in FIGS. 3 to 8) and the shutter 8 fixed to the slider 10 are guided to be slidable in the opening and closing direction. The slider 10 (shown in FIGS. 3 to 8) and the shutter 8 fixed to the slider 10 are prevented from being detached from the cartridge case 2. Further, an engagement groove 4d on the cartridge case 2 side that engages with an end engagement portion of the torsion coil spring 20 is formed.
[0014]
3 is a side view showing an embodiment of the slider of the disk cartridge of the present invention, FIG. 4 is a view seen from the upper side (on the drawing) of FIG. 3, and FIG. 5 is a view seen from the lower side of FIG. 6 is a diagram viewed from the left side (on the drawing) of FIG. 3, FIG. 7 is a diagram showing the first embodiment viewed from the right side (on the drawing) of FIG. 3, and FIG. FIG. 9 is a sectional view taken along line XX of FIG. 1 showing the first embodiment of the present invention, and FIG. 10 shows the second embodiment of the present invention. 2 is a cross-sectional view taken along line XX in FIG. 1, in FIGS. 3, 4, and 5, the left end portion of the slider 10 indicates a closing direction side end portion, and the right end portion indicates an opening direction side end portion. An engaging projection 11 is formed at the end of the slider body 10 on the side in the closing direction to engage the recording / reproducing device opening / closing pin for opening and closing the shutter 8, and the projecting portion via the leg 12a. 12 is formed, and the engaging protrusion 11 and the protrusion 12 are supported by a rail-like support protrusion 4 a provided on the half shell 4 of the cartridge case 2 and a rail-like support protrusion provided on the half shell 5. It is comprised so that. This can prevent the slider 10 and the shutter 8 fixed to the slider 10 from being detached from the cartridge case 2.
[0015]
Further, a window portion 9 that engages with an end engaging portion of a torsion coil spring 20 (not shown), which is an elastic member, is formed at the opening direction side end of the main body portion 10a of the slider 10, and the torsion There is a substantially U-shaped wall forming an insertion hole 40 having a split groove 30 through which an arm portion of a coil spring 20 (not shown) can pass, and the two opposite walls 41, 42 of the substantially U-shaped wall are opposed to each other. Protrusions 13 and 14 are formed at the free ends via leg portions 13a and 14a. The protrusion 13 has a concave guide groove 4b that guides the slider 10 provided inside the half shell 4 in the opening and closing direction, a rail-like convex protrusion 4c that constitutes the concave guide groove 4b, and the protrusion Reference numeral 14 denotes a concave guide groove 5b that guides the slider 10 provided inside the half shell 5 in the opening and closing direction, and a rail-like convex protrusion 5c that constitutes the concave guide groove 5b. It is configured.
[0016]
7 is a diagram showing the first embodiment viewed from the right side (on the drawing) of FIG. 3, and FIG. 9 is a cross-sectional view taken along the line XX of FIG. 1 showing the first embodiment of the present invention. The wall on the side where the window portion that engages with the end engaging portion of the torsion coil spring of the opposing two walls 41 and 42 of the substantially U-shaped wall forming the insertion hole 40 having the split groove 30 is formed. A projecting portion 14 is formed on the disc-shaped information recording medium side of the free end portion of the thin one wall 42 so as to project through the leg portion 14a, and is built up at the connecting portion of the free end portion of the one wall 42 and the leg portion 14a. An overlaid portion 15 is formed. Further, the corners of the rail-like convex projections 5c constituting the concave guide groove 5b for guiding the slider 10 provided inside the half shell 5 in contact with the build-up portion 15 in the opening and closing direction are The chamfered portion 16 is formed by chamfering linearly according to the shape.
[0017]
8 is a diagram showing a second embodiment viewed from the right side (on the drawing) of FIG. 3, and FIG. 10 is a cross-sectional view taken along the line XX of FIG. 1 showing the second embodiment of the present invention. The case where the build-up part 15 'is built up in the round shape is shown. In this case, as a matter of course, the corners of the rail-like convex protrusions 5c constituting the concave guide grooves 5b that guide the slider 10 provided in the opening and closing direction inside the half shell 5 in contact with the built-up portion 15 '. The part is chamfered in a round shape in accordance with the shape of the build-up part 15 'to form a rounded chamfered part 16'.
[0018]
As shown in the first and second embodiments described above, the end engaging portions of the torsion coil springs of the opposing two walls 41, 42 of the substantially U-shaped wall forming the insertion hole 40 having the split groove 30 Is dropped into the disc cartridge 1 by building up the connecting portion of the leg portion 14a on the disc-shaped information recording medium side of the thin wall 42 on the side where the window portion engaging with the disc is formed. Even when an impact such as the above is applied, it is not broken at the connecting portion between the free end portion of the one wall 42 and the leg portion 14a.
[0019]
【The invention's effect】
As described in detail above, the disc cartridge of the present invention has an insertion hole having a split groove provided at the opening side end of the main body of the slider even when an impact such as dropping is applied to the disc cartridge. The leg portion and the projecting portion formed on the disc-shaped information recording medium side of the free end portion of the thin wall of the two opposing walls of the substantially U-shaped wall to be formed are the wall It is possible to completely prevent breakage at the connecting portion between the free end of the thin wall and the leg.
[Brief description of the drawings]
FIG. 1 is a diagram of a disc cartridge according to the present invention as viewed from the front side.
FIG. 2 is an inner plan view of the half shell 4 of FIG.
FIG. 3 is a diagram showing an embodiment of a disc cartridge according to the present invention.
4 is a view as seen from the upper side (on the drawing) of FIG. 3. FIG.
5 is a view as seen from the lower side (on the drawing) of FIG. 3;
6 is a view from the left side (on the drawing) of FIG. 3;
7 is a diagram showing the first embodiment viewed from the right side (on the drawing) of FIG. 3; FIG.
8 is a diagram showing a second embodiment viewed from the right side (on the drawing) of FIG. 3. FIG.
9 is a cross-sectional view taken along line XX in FIG. 1 showing a first embodiment according to the present invention.
10 is a cross-sectional view taken along line XX in FIG. 1 showing a second embodiment according to the present invention.
FIG. 11 is a diagram showing the conventional embodiment of FIG. 7;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disc cartridge 2 Cartridge case 3 One side edge 4,5 Half shell 4a Rail-shaped support protrusion 4b, 5b Recessed guide groove 4c, 5c Rail-shaped convex protrusion 4d Engaging groove 6 Disc-shaped information recording medium 6a Hub 7 Head insertion hole 8 Shutter 9 Window 10 Slider 10a Slider body 11 Engagement projections 12, 13, 14 Protrusions 12a, 13a, 14a Legs 15, 15 'Overlay 16, 16' Chamfer 20 Torsion coil spring 30 Split groove 40 Insertion hole 41, 42 Wall P Opening and closing pin

Claims (1)

A disk-shaped information recording medium is housed therein, and a head insertion hole into which a head for reading and writing information of a recording / reproducing apparatus is inserted, and a spindle for driving the recording / reproducing apparatus for rotating the disk-shaped information recording medium are provided. A slider formed by a pair of upper and lower half shells facing each other having a spindle insertion hole to be inserted, slidably provided along one side edge of the half shell, and an elastic force for biasing the slider in one direction In a disk cartridge comprising a member and a shutter fixed to the slider and opening and closing the head insertion hole and the spindle insertion hole and having a substantially U-shaped cross section, the slider is closed in the longitudinal direction of the main body. An engagement protrusion for engaging with an opening / closing pin of a recording / reproducing apparatus for opening / closing the shutter at the side end and a detent at the end in the closing direction. A projecting portion projecting through a leg portion is formed on the disk-shaped information recording medium side, and an end engaging portion of the elastic member is inserted into an end portion of the slider main body in the longitudinal direction, There is a substantially U-shaped wall forming an insertion hole having a split groove through which an arm portion of the elastic member connected to the end portion engaging portion can pass, and two walls facing each other of the substantially U-shaped wall And a free end portion and a leg portion of the wall on the side where the one insertion hole is formed on the two walls. Chamfering is applied to the portion of the rail-like convex projection provided on the half shell side that is built up on the portion facing the portion on which the slider is built up. A disc cartridge characterized by being made.

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