JPH0594684A - Disk cartridge - Google Patents

Abstract

PURPOSE:To prevent a shutter member from detaching and also to prevent from dusts entering by forming butt ribs over an upper and a lower half at a front edge surface side of a cartridge body. CONSTITUTION:The butt ribs 60 are provided over the upper and lower halve 32, 33, at the front edge surface side on which the shutter member 41 of the cartridge body 34 slides. The butt ribs 60 are constituted with the rib halve 60a, 60b and by providing the ribs 60, a groove part in which one portion of the shutter member 41 enters, is formed and also reinforcement of each of edge surfaces 32a, 33b of the upper and lower halve 32, 33 is contrived. Thus deformation of the front edge surface side of the cartridge body 34 is prevented and detaching of the shutter member 41 due to the deformation is prevented. Also enough tight closure of the cartridge body 34 by the butt ribs 60 is guaranteed, entry of dust and degradation of the recording and reproducing characteristics are prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge containing a disc-shaped recording medium such as an optical disc capable of recording information signals such as tone signals and video signals,
In particular, the present invention relates to a cartridge main body having the disk-shaped recording medium, which has a groove portion for a slide guide of the shutter member on the front end surface side where the shutter member slides.

[0002]

2. Description of the Related Art Conventionally, there has been widely used a disk cartridge constituted by accommodating a disk, which is a disk-shaped recording medium such as an optical disk capable of recording information signals such as tone signals and video signals, in a rectangular cartridge body. It is used. In this way, by accommodating the disc in the cartridge body, the attachment of dust and scratches to the disc is prevented, and the disc is protected.

Since the disk cartridge is mounted in the recording / reproducing apparatus in a state where the disk is housed in the cartridge body, a part of the signal recording area of the disk is radially extended to the cartridge body. An opening for recording and reproducing the information signal is provided so as to face the other side. If such an opening is provided, dust or the like enters the cartridge body through the opening when the disk cartridge is not used and is stored, and the disk is contaminated, which deteriorates the recording / reproducing characteristics of the information signal. I will end up. Therefore, the cartridge body is provided with a shutter member for closing the opening for recording / reproducing the information signal as necessary.

A disk cartridge constructed as shown in FIG. 5 has been proposed as a disk cartridge to which a shutter member for opening and closing the information signal recording / reproducing opening is attached. As shown in FIG. 5, this disc cartridge is configured by accommodating an optical disc 1 as a disc-shaped recording medium in a cartridge body 4 configured by butt-joining a square upper half 2 and a lower half 3 to each other. .. Inside the cartridge main body 4, a disc storage position regulation wall 6 is formed which forms a disc storage portion 5 and regulates the storage position of the optical disc 1 stored therein.

Further, the cartridge body 4 is provided with a disc table entry opening 7 into which a disc table of a disc rotation driving device for rotating the optical disc 1 when the disc cartridge is mounted in a recording / reproducing device is inserted. ing. Specifically, the disc table entrance opening 7 has an inner peripheral portion including a metal plate 8 for disc chucking, which is attached so as to cover the center hole 1a of the optical disc 1 housed in the cartridge body 4, outwardly. As shown in Fig. 7, the lower half 3
Is formed with a circular opening at the substantially central portion.

Further, the upper and lower surfaces of the cartridge body 4,
That is, in the upper and lower halves 2 and 3, at least a part of the signal recording area of the optical disc 1 housed therein is exposed to the outside for the inner and outer circumferences of the information signal recording / reproducing openings 9 and 1.
0 is open. As shown in FIG. 5, the information signal recording / reproducing openings 9 and 10 extend substantially in the left-right direction of the cartridge body 4 from a position close to the disk table entry opening 7 to the front side of the cartridge body 4. It is formed in a rectangular shape at the central position.

The cartridge body 4 formed in this way
As shown in FIGS. 6 and 7, a shutter member 11 for opening and closing the information signal recording / reproducing openings 9, 10 is provided from the front end surface side where the information signal recording / reproducing openings 9, 10 are formed. It is arranged so as to be fitted.

By the way, a part of the shutter member 11 enters the front end face side of the cartridge body 4 where the shutter member 11 moves, and a shutter opening operation provided on the recording / reproducing device side for moving the shutter member 11 is performed. A groove 12 for inserting the shutter opening operation member into which the pin enters is provided.

The shutter member 11 provided in the cartridge body 4 is formed by punching and bending a thin metal plate and closes the information signal recording / reproducing openings 9 and 10, respectively. Shutter section 11a, 1
1b and a connecting piece 11c for connecting the base end sides of the shutter portions 11a and 11b, and is formed to have a U-shaped cross section as a whole. A slide guide portion 13 is provided on one side of the connecting piece 11c so as to guide the shutter member 11 so that the shutter member 11 can slide in parallel along the front surface side of the cartridge body 4. The slide guide portion 13 is formed so as to be continuous with the shutter portion 11b extending to the lower half 3 side of the cartridge body 4, and has a U-shaped cross section having a thickness substantially corresponding to the thickness of the lower half 3. It is formed. Then, the slide guide portion 13
On one side, a slide guide piece 14 that extends into the groove 12 formed on the front end surface side of the cartridge body 4 and extends to the upper surface on the front end surface side of the lower half 3 and a shutter lock mounted in the cartridge body 4 are provided. An engaged piece 16 that is engaged with the member 15 and holds the shutter member 11 at the opening closed position is bent.

The lower half 3 of the shutter member 11
A pair of engaging pieces 18 that engage with a slide guide groove 17 formed on the front end surface side of the lower half 3 is provided at the base end of the side of the shutter portion 11b that is connected to the connecting piece 11c. ，
18 and a pair of engaging protrusions 19 and 19 are formed.

The shutter member 11 configured as described above
Are fitted and disposed from the front end face side of the cartridge body 4 so that the shutter portions 11a and 11b extend over the information signal recording / reproducing openings 9 and 10. At this time, the shutter member 11 causes the pair of engaging pieces 18, 18 and the pair of engaging protrusions 19, 19 to engage with the slide guide groove 17, and also allows the slide guide piece 14 formed on the slide guide portion 13 and the covered portion. The engaging piece 16 is inserted into the groove portion 12 and attached to the cartridge body 4. In this way, the shutter member 11 attached to the cartridge main body 4 is prevented from coming off from the cartridge main body 4 by the pair of engaging pieces 18, 18 engaged with the slide guide groove 17,
The pair of engaging projections 19 and 19 engaged with the slide guide groove 17 together with the engaging pieces 18 and 18 and the slide guide portion 13 restrict the slide direction to open and close the information signal recording and reproducing openings 9 and 10. It can be moved in any direction.

[0012]

By the way, as described above, the recording / reproducing apparatus side in which a part of the shutter member 11 is inserted into the front end face side where the shutter member 11 moves and the shutter member 11 is moved and operated. In the cartridge main body 4 having the groove portion 12 for inserting the shutter opening operation member, into which the shutter opening operation pin is inserted, the front end face side in which the groove portion 12 is formed is left open.

Therefore, when a shock is applied to the cartridge body 4 such as by dropping the disk cartridge, the front end surface side of the cartridge body 4 in which the groove 12 is formed is easily deformed. In particular, the front end surfaces 2a and 3a of the upper and lower halves 2 and 3 that form the cartridge body 4 are easily bent in the directions in which they approach each other as shown by the phantom line in FIG. When such bending occurs, the engagement of the engagement pieces 18, 18 with the slide guide groove 17 is released, and the cartridge body 4 of the shutter member 11 is released.
It causes the dropout from.

Further, as shown in FIGS. 6 and 7, shutter portions 11a and 11b are provided on the upper and lower surfaces of the cartridge body 4 on which the shutter member 11 slides.
The recessed portions 20 and 21 are formed so that they can be extended flush with each other without protruding from the upper and lower surfaces. The portion where the concave portions 20 and 21 are formed is thinner than the other portions where the shutter portions 11a and 11b do not extend. Since the concave portions 20 and 21 are formed on the extending portion of the shutter member 11, they are formed on the front end face side of the cartridge body 4.
The deformation of the front end face side of the cartridge body 4 in which the groove 12 is formed is made easier.

Further, in the cartridge body 4 in which the groove portion 12 is formed and the front end face side is left open, the inside of the cartridge body 4 in which the optical disc 1 is housed cannot be sufficiently sealed. Therefore, the cartridge body 4
It is not possible to reliably prevent the entry of dust into the interior. In particular, it is difficult to prevent the shavings from the cartridge body 4 that occur when the shutter member 11 slides from entering the cartridge body 4.

Therefore, according to the present invention, the cartridge body is prevented from being easily deformed even when an impact is applied, and the shutter member is prevented from being easily removed from the cartridge body. The present invention has been proposed for the purpose of providing a disk cartridge capable of ensuring hermeticity.

[0017]

In order to achieve the above-mentioned object, a disk cartridge according to the present invention is constructed by butt-joining square upper and lower halves to each other. An arc-shaped disc storage position regulation wall for regulating the storage position of the disc-shaped recording medium stored on the side surface is formed, and at least a part of the stored disc-shaped recording medium is exposed to the outside in the radial direction. A cartridge main body having an opening for recording and reproducing an information signal, and a shutter member slidably attached to the cartridge main body for opening and closing the opening, the front end of the cartridge main body on which the shutter member slides. A groove into which a part of the shutter member enters is formed on the surface side, and the front end surface of the cartridge body is formed. Those formed by providing a butt ribs over between the upper and lower halves in the cartridge body inner position between the top of the disc storage position regulating walls forming an arc shape located on the front surface side of the.

[0018]

In the disk cartridge according to the present invention, the abutment formed between the upper and lower halves prevents deformation of the front end surface side of the cartridge body due to the formation of the groove.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. The disc cartridge described below contains an optical disc capable of re-recording an information signal. Like the above-mentioned disc cartridge, the disc cartridge accommodating the optical disc 31 has an upper half 32 and a lower half 33 which are formed in a rectangular shape by molding a synthetic resin as shown in FIG. An optical disc 31 as a disc-shaped recording medium is housed in a cartridge body 34 configured as described above. Inside the cartridge main body 34, a disk storage position regulation wall 36 which constitutes a disk storage portion 35 and which regulates the storage position of the optical disk 31 stored therein is inscribed in the outer peripheral circular edge of the cartridge main body 34. Is formed in this way. The disk storage position control wall 36 is formed by the storage position control wall halves 36a, 3 formed so as to stand upright on the inner surfaces of the upper and lower halves 32, 33.
It is formed by abutting 6b.

Further, the cartridge body 34 is provided with a disc table entrance opening 37 into which a disc table of a disc rotation driving device for rotating the optical disc 31 when the disc cartridge is mounted in a recording / reproducing device is inserted. ing. The disc table entry opening 37 is specifically formed by the cartridge body 34.
As shown in FIG. 3, the lower half 33 is formed so that the inner peripheral side portion including the metal plate 38 for disk chucking attached to cover the center hole 31a of the optical disk 31 housed in the disk can be exposed to the outside. It is formed with a circular opening in the center.

On the upper and lower surfaces of the cartridge body 34, that is, on the upper and lower halves 32 and 33, an information signal for exposing at least a part of the signal recording area of the optical disk 31 housed here to the outside over the inner and outer circumferences. Recording / reproducing openings 39, 40 are opened. As shown in FIG. 1, these information signal recording / reproducing openings 39, 40 extend in the left-right direction of the cartridge body 34 from the position close to the disk table entry opening 37 to the front end face side of the cartridge body 34. It is formed in a rectangular shape at a substantially central position.

Cartridge body 3 formed in this way
As shown in FIGS. 2 and 3, a shutter member 41 for opening and closing the information signal recording / reproducing openings 39, 40 is provided on the front end surface 4 on which the information signal recording / reproducing openings 39, 40 are formed. Are arranged so as to be fitted to each other.

By the way, on the front end face side of the cartridge body 34 where the shutter member 41 moves, the shutter member 41 is provided.
A slot 42 for inserting a shutter opening operation member into which a shutter opening operation pin provided on the side of the recording / reproducing device for moving the shutter member 41 enters is provided. The groove portion 42 for inserting the shutter opening operation member has an opening end 42a on one side surface orthogonal to the front end surface of the cartridge body 34 and extends in the moving direction of the shutter member 41, as shown in FIGS. Formed.

Groove 4 for inserting the shutter opening operation member
A shutter slide guide wall 43 for ensuring a stable slide of the shutter member 41 movably attached to the cartridge body 34 is formed in the inside 2. The shutter slide guide wall 43 is formed upright on the inner surface of the lower half 33.

On the inner side surface of the information signal recording / reproducing opening 39 formed in the upper half 32 on the front edge side, a groove portion 42 for inserting the shutter opening operation member is abutted with the inner side surface of the lower half 33. A butting wall 44 that functions to prevent bending of the cartridge body 34 in the thickness direction is formed upright.

The information signal recording / reproducing opening 39,
A shutter member 41 for opening and closing 40 is formed by punching and bending a thin metal plate, and has shutter portions 41a and 41b for closing the information signal recording / reproducing openings 39 and 40, respectively, and these shutters. Parts 41a, 41b
And a connecting piece 41c for connecting the base end sides thereof, and is formed to have a U-shaped cross section as a whole.

At both ends of the connecting piece 41c of the shutter member 41, there are first and second slide guide portions for guiding the shutter member 41 so that the shutter member 41 can be stably moved in parallel along the front surface side of the cartridge body 34. 45 and 46 are respectively projected. The first and second slide guide portions 45 and 46 are formed by bending so as to have a U-shaped cross section having a height H ₂ substantially corresponding to the height H ₁ on the front surface side of the lower half 33. ..

Then, the first slide guide portion 45 is provided.
A shutter member 41 is provided on the tip side of the cartridge main body 3
4, a lock piece which is inserted into the shutter opening operation pin insertion groove 42 formed on the front surface side of the cartridge body 34 and is relatively engaged with the shutter lock member 47 disposed in the cartridge body 34. 48 is bent and formed.

Further, the first and second slide guide portions 4
At the tip of the portion extending to the lower half 33 side of 5, 46,
This slip-off prevention means for engaging the slide guide groove 49 formed on the outer surface side of the lower half 33 to guide the moving direction of the shutter member 41 and preventing the shutter member 41 from coming off the cartridge body 34. Guide piece 5
0 and 51 are bent and formed.

The shutter member 41 constructed as described above
As shown in FIGS. 2 and 3, each shutter unit 41a,
41b is fitted and arranged from the front side of the cartridge body 34 so that 41b extends over the information signal recording / reproducing openings 39, 40. At this time, in the first and second slide guide portions 45 and 46, the retaining guide pieces 50 and 51 are engaged with the slide guide groove 49 and the side into which the shutter opening operation member insertion groove portion 42 is inserted. Is extended on the upper end surface of the shutter slide guide wall 43 to support the lower half 33 so as to hold the front side thereof. In addition, the lock piece 48 formed by bending the first slide guide portion 45 is in a state of protruding into the groove portion 42.

When the shutter member 41 is fitted and arranged on the cartridge body 34, a retaining guide piece is provided on a lower surface of the front end surface side of the cartridge body 34 to which the shutter member 41 is fitted and arranged. Inclined guide surfaces 50a and 50b are formed as shown in FIG. 3 for guiding the slide guide groove 49 so that the slide guide groove 50 can be easily engaged.

As described above, the shutter member 41 fitted and arranged in the cartridge main body 34 so as to hold the front surface side of the lower half 33 by the first and second slide guide portions 45 and 46 is a retaining guide piece. The slide guide groove 49 in which 50 and 51 are engaged is guided in the slide direction, and the shutter slide guide wall 43 restricts the swinging of the first and second slide guide portions 45 and 46 during sliding, thereby recording an information signal. Playback openings 39, 40
Is slidably attached to the cartridge main body 34 between an opening closing position where the opening is closed and an opening opening position where the information signal recording / reproducing openings 39 and 40 are opened.

In addition, the information signal recording / reproducing opening 39 through which the shutter member 41 of the cartridge body 34 slides,
In the region extending from the peripheral edge of 40 to one side surface and the front end face side of the cartridge main body 34, shutter slide concave portions 52, 53 and 54 having a depth approximately equal to the thickness of the plate material forming the shutter member 41. Are formed. By forming the shutter slide recesses 52, 53, and 54 in this manner, the shutter member 41 can be fitted and arranged flush with the surface of the cartridge body 34, and the shutter member 41 can be fitted and arranged. The provision prevents the cartridge body 34 from becoming thick.

The portions of the upper and lower surfaces of the cartridge body 34 where the shutter slide concave portions 52 and 53 are formed are made thin by the depth of the concave portions 52 and 53.

On the other hand, inside the cartridge body 34, a shutter member 41 attached to the cartridge body 34 is provided.
Is provided with a shutter lock member 47 for holding the information signal recording / reproducing openings 39, 40 at the opening closed position. The shutter lock member 47 includes a support shaft 55 in which a pivotal support portion 57 on the base end side is erected on the inner surface of the lower half 33.
And a lock arm portion 59 having an engaging portion 58 with which the lock piece 48 of the shutter member 41 relatively engages is provided so as to face the groove portion 42 for inserting the shutter opening operation member. ..

The shutter lock member 41 is
When the shutter member 41 is moved to the opening closing position,
The shutter member 41 is locked at the opening closing position by engaging the locking piece 48 with the engaging portion 58.

In the disc cartridge according to the present invention, the shutter member 4 of the cartridge body 34 is used.
1 is located at an inner side position of the cartridge main body 34 between a front end surface on which 1 slides and a top portion 36c of an arc-shaped disc storage position regulation wall 36 located on the front end surface side. As shown, a butting rib 60 extending between the upper and lower halves 32, 33 is provided.

This butt rib 60 is formed on the upper and lower halves 3.
Rib halves 60 formed upright from the inner surface of 2, 33
It is configured by abutting a and 60b.

As described above, the abutment rib 60 extending between the upper and lower halves 32 and 33 is more specifically, the front end of the cartridge main body 34 at the position where the recessed portions 52 and 53 for shutter slide are formed to be thin portions. It is provided parallel to the plane.

In the above-mentioned embodiment, the abutment rib 60 is formed by abutting the rib halves 60a and 60b formed on the inner surfaces of the upper and lower halves 32 and 33, respectively. One of the ribs 3 may be one rib having a sufficient height to hit the inner side surface of the rib.

By providing the abutting ribs 60 as described above, the upper and lower halves 32, 33 forming the cartridge main body 34 provided with the groove 42 are reinforced on the front end surfaces 32a, 33a side. .. Further, since the abutment rib 60 is provided between the upper and lower halves 32 and 33, the opened cartridge body 3
The front end face side of 4 will be closed.

Further, since the abutting ribs 60 are provided inwardly from the front end surface side of the cartridge body 34, the cartridge body 3 made of synthetic resin is used.
It is possible to maintain appropriate flexibility in the front end surface side portion where the groove portion 4 of 4 is formed, and it is possible to ensure the ease of the mounting operation when the shutter member 41 is fitted and disposed.

In the above-described embodiment, the example applied to the disk cartridge containing the optical disk 31 has been described, but not limited to the optical disk 31, a disk-shaped storage medium in which a predetermined information signal is recorded is housed, and the shutter member. The present invention can be widely applied to a disc cartridge having a cartridge main body in which a groove portion or the like is provided in the front end surface portion on which the slides.

[0044]

As described above, in the disk cartridge according to the present invention, the front end surface side of the cartridge main body which is opened by providing the groove portion by the abutment rib provided on the front end surface side of the cartridge main body is designed. Therefore, even if an impact is applied to the cartridge body, the front end face side portion is prevented from being easily deformed, and the shutter member can be prevented from easily falling off from the cartridge body. Then, the shutter member can be securely held in the cartridge body, and reliable protection of the disc-shaped recording medium housed in the cartridge body is achieved.

Further, the abutment rib ensures a sufficient hermeticity of the cartridge body, and prevents shavings and other dust from entering the cartridge body due to the sliding contact between the shutter member and the cartridge body. Since it can be surely prevented, deterioration of the recording / reproducing characteristics of the disc-shaped recording medium due to the adhesion of dust or the like can be surely prevented.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a disc cartridge according to the present invention.

FIG. 2 is a perspective view from the upper surface side of the disc cartridge according to the present invention.

FIG. 3 is a perspective view from the lower surface side of the disc cartridge according to the present invention.

FIG. 4 is a partial vertical cross-sectional view showing a front end surface side portion of the disc cartridge. FIG.

FIG. 5 is an exploded perspective view of a conventional disc cartridge.

FIG. 6 is a perspective view from the upper surface side of the disc cartridge.

FIG. 7 is a perspective view from the lower surface side of the disc cartridge.

FIG. 8 is a partial vertical cross-sectional view showing a front end surface side portion of the disc cartridge.

[Explanation of symbols]

 31 optical disk 32 upper half 33 lower half 34 cartridge body 36 disk storage position regulating wall 39, 40 information signal recording / reproducing opening 41 shutter member 42 groove portion formed on the front end surface side of the cartridge body 52, 53 shutter slide concave portion 60 Butt ribs 60a, 60b Rib halves 60a, 60b

Claims (1)

[Claims] 1. A disk storage position having an arc shape for restricting a storage position of a disk-shaped recording medium stored in at least one inner side surface of at least one of the upper and lower halves, the upper and lower halves having a rectangular shape are butted and coupled to each other. A cartridge main body formed with a restriction wall and formed with an opening for recording and reproducing an information signal for exposing at least a part of the stored disk-shaped recording medium outward in the radial direction, and the cartridge main body. A shutter member that is slidably attached to open and close the opening, and a groove portion into which a part of the shutter member enters is formed on a front end surface side of the cartridge body on which the shutter member slides, and the cartridge body. Between the front end surface of the disk and the top of the arc-shaped disk storage position control wall located on the front end surface side. Disc cartridge comprising a rib abutting over between the upper and lower half-di body inner position.