KR880003092Y1 - Magnetic disk cartridge - Google Patents

Abstract

No content.

Description

Magnetic disc cartridge

1 is a partial plan view of a jacket or cartridge incorporating a magnetic disk.

2 is a rear view of the jacket or cartridge shown in FIG.

3 is an enlarged sectional view taken along line 3-3 'of FIG.

4 is an enlarged plan view from which the upper wall of the jacket is removed.

5 is an enlarged cross-sectional view taken along the line 5-5 'of FIG.

6 is an enlarged plan view with the top wall of the jacket removed, with the indicator drive pin inserted therein.

FIG. 7 is an enlarged sectional view taken along line 7-7 'of FIG.

* Explanation of symbols for the main parts of the drawings

1: cartridge 2: jacket

3: disc 21: dial

24: gear member 28: display scale plate

30: drive shaft 23: cabinet (instructions)

The present invention relates to a magnetic disk cartridge, and more particularly, to a cartridge in which a jacket containing a magnetic disk that can be rotated is formed. The cartridge is used in a recording device of an electronic still camera, and the cartridge is provided with an indicator. The number of recorded still "pictures" is displayed.

Rotatable magnetic disks have been used to record information in various types of devices. For example, in computer systems such as word processors, magnetic disks known as "diskettes" have been used to record information signals. Typically, such diskettes were housed in a jacket and used to protect the magnetic information recording surface of the magnetic disk, furthermore preventing the magnetic disk from overlapping, crushing or other serious damage. The protective jacket is provided with a window through which one or more magnetic transducers are inserted to magnetically contact the magnetic surface of the disk to record or reproduce information signals on the disk. This information signal is recorded in a plurality of circular recording tracks.

In the above-described magnetic disk, there is no display means on the apparatus of the jacket or the disk housing, so that the user cannot display the number on which the information signal is recorded. Typically, this information is generated by a recording device capable of estimating tracks and used to indicate which tracks can be further recorded. However, in almost all information recording systems, the user cannot calculate this information and therefore cannot know the actual recording capacity which has already been recorded or can be further recorded.

It is therefore an object of the present invention to provide an improved magnetic disk cartridge with an indicator so that a user can directly know the recording capacity which has already been recorded or can be further recorded.

Another object of the present invention is to provide a magnetic disk cartridge in which a user can directly know the number of tracks of information signals already recorded on an improved magnetic disk having a jacket on which the aforementioned indicator is installed.

Another object of the present invention is to provide a magnetic disk cartridge having a relatively simple structure and easily equipped with an indicator that operates in a simple manner so that the user can easily know the number of tracks of information signals already recorded on the magnetic disk. To provide.

The various objects, advantages, and features of the present invention and novel features are described in the appended utility model claims.

According to the present invention, a disk cartridge is housed in a magnetic disk unit, and the magnetic disk has a hub configured to receive a drive shaft which can be rotated. As the drive shaft is rotated, the magnetic disk is rotated to record an information signal on a separate circular track. do. The cartridge is provided with a jacket and an opening for wrapping and protecting the magnetic disk, through which the drive shaft described above penetrates and is stored in the magnetic disk hub. The jacket is also provided with an indicator to directly display the number of tracks of the already recorded information signal. Thus, the indicator will indicate the recording capacity of the disc which has already been consumed or can be further recorded.

According to one feature of the present invention, the information indicator is composed of a dial and a display scale plate, which displays the number of tracks that can be recorded on the magnetic disk. The dial and the indicator scale are relatively easy to move with respect to each other, and the dial is configured to display the number of tracks displayed on the indicator dial.

In one embodiment of the present invention, the dial includes a recess rotatable and receiving a drive pin associated with a recording / playback apparatus in which a magnetic disk cartridge is used. This recess not only rotates the dial in response to the rotation of the drive pin, but also acts as a guideline.

In a particular embodiment of the present invention there is a releasable lock member which is mechanically connected to the gear member and can be fitted between adjacent teeth of the gear member, so as to unlock the dial at any particular angular position. When the dial is driven to rotate, the dial is released so that the lock member passes through the saw teeth on the gear member continuously. As the releasable lock member, a form of an elastic pawl fixed to the inner surface of the jacket is suitable.

Hereinafter, the present invention will be described in more detail with reference to the attached drawings.

In the drawings, the same members are described in FIGS. 1 and 2 and 3, the cartridge 1 being for use in a recording and reproducing apparatus of a flexible disk, having a substantially rectangular square or housing 2, The jacket or housing can be molded from a suitable plastic, with two facing walls 2a and 2b between which the flexible disk 3 of the native material can be freely rotated. As the small diameter of the disk, for example, a diameter of about 50 mm is appropriate, and the jacket 2 can be made into a small standard, for example, 60 mm x 54 mm x 3 mm in correspondence to this. It is also suitable for use in very compact recording and reproducing apparatus, as well as being easy to pack and package, and which may be part of a still image camera not larger than a conventional 35 mm single-lens reflex camera. The walls 2a and 2b of the jacket 2 are provided with openings or windows 4, which are arranged on the outer surface of the arc inner surface of the circular recording track on the recording surface 3a of the disk. It extends in the radial direction. The door member 5 is shown in FIG. 1 with the portion of the door member 5 disposed over the disk 3 and along the edge of the jacket 2 and disposed on the inner surfaces of the walls 2a and 2b. It is slidably moved in the direction indicated by the open position in the shown closed position. In order to force the door member 5 to its closed position, the tension member 5b may be connected to the door member 5, and the protrusion 5c may extend from the door member 5, When inserting the cartridge 1, the door member 5 may be actuated by an appropriate member provided in the device for storing the cartridge 1 in a camera (not shown). Thus, when the door member 5 is opened, one or more magnetic heads may extend through the window 4, for example in a selected concentric circular track on the disc surface 3a (see Figure 3). For example, an information signal of a still image or an image is magnetically recorded.

The hub 6 is provided at the center of the disk 3, and since the hub has a hole 7, the drive shaft (not shown) of the recording / playback apparatus is accommodated through this hole. This hole 7 is a non-circular shape and forms a pair of relatively angular positioning surfaces 8 so that the circumference of the drive shaft and the center of the disk 3 in which the drive shaft rotates with respect to the axis center are brought into contact with each other. On the opposite side of the positioning surface 8 a chordal element 9 extending across the hole 7 is supported on a hole 10 extending along the element 9 on the opposite side of the element surface 9a. A force is applied toward the positioning surface 8. The above-described hub 6 can be easily molded from a suitable plastic material, which also gives elasticity to the elastic member 9. The size of the hole 7 is such that when inserted into the hole of the drive shaft, the elastic string element 9 is fixed away from the positioning surface 8 by the shaft so that the contact between the outer circumference of the drive shaft and the positioning surface 8 is firm. Has a specification.

The hub 6 also has an annular magnetic member 11 suitably mounted on its bottom. The hub 6 also has a magnetic detection pin 13 used to detect the rotational phase or position of the disk 3 and a nonmagnetic balancing pin 14 of substantially the same weight as this pin 13 on the opposite side. This is enclosed. In one embodiment, at least three struts or tongs 16 extend from the bottom of the hub 6 in the same angular position away from the bottom of the hub 6 towards the annular magnetic element 11. The bottom face 16a of the support 16 protrudes slightly from the lower side of the hub 6 so that a reference level is set with respect to the magnetic recording surface 3a of the disc 3. In another embodiment, the aggregate 16 is replaced with a continuous annular rim. The walls 2a and 2b of the jacket 2 have center openings 17a and 17b, and the hub 6 can be loosely rotated.

According to the present invention, the indicator 2 is provided on the jacket 2 of the cartridge 1 to indicate the position of the disc 3 already consumed or the position of the remaining disc portion which can be further recorded. In addition, the indicator 20 includes instructions configured to indicate the number of tracks of the information signal already recorded on the disc.

In the illustrated embodiment, the dial 21 is configured to rotate relative to the display scale 28. In another embodiment, the indicator scale is arranged on the rotatable dial to rotate with respect to the instructions fixed to the jacket 2. Thus, the dial 21 and the display scale plate 28 can be rotated relatively easily with respect to each other.

As shown in the first drawing, the display scale plate 28 is preferably engraved with a numeral indicating the track recorded on the disc. As an example, the disc 3 may be provided with 50 recording tracks. Then, the display scale plate 28 is provided with the numerical marks from the track 1 to the track 50. Each number shown in Figure 1 can be classified by appropriate markings. Such markers may be labeled on every track or one across or similar.

The jacket 2 is also provided with openings 27a and 27b, through which the dial 21, for example, can access the combined drive mechanism as described below. The dial 21 is arranged in the space between the upper wall 2a and the lower wall 2b and is configured to rotate therein. Instructions can be observed through the opening 27a of the upper wall 2a as will be explained in FIG. 4 and the dial itself is driven by a suitable device that engages the dial through the opening 27b of the lower wall 2b. Can be.

As best shown in FIGS. 4 and 5, the dial 21 is mechanically coupled to the gear member 24, with teeth on the circumference of the gear member. In the preferred embodiment, the dial 21 and the gear member 24 are integrally formed of a suitable plastic. The gear member 24 may also be coupled to the dial 21 as a suitable mechanical transmitter.

In one embodiment, the dial and the gear member are integrally formed and the gear member is formed symmetrically with respect to the dial such that the same part of the dial is disposed above and below the gear member as shown in FIG. In the embodiment shown in FIG. 5, the upper and lower surfaces of the dial 21 are stepped to be disposed in the openings 27a and 27b of the upper wall 2a and the lower wall 2b, respectively. In another embodiment, the stepped portion can be omitted, so that the top and bottom surfaces of the gear 24 are located on the inner surfaces of the upper and lower walls of the jacket 2, respectively, and the dial 21 is formed with an opening ( Located within 27a) and 27b).

The releasable lock device 25 cooperates with the gear member 24 to lock the gear member, so that the locked position becomes the current position of the dial 21. As will be described later, the dial 21 can be rotationally driven by an appropriate drive mechanism installed in the recording / reproducing apparatus, and if a magnetic disc cartridge is used to increase the number of circular tracks for which information has already been recorded, the instructions 23 will indicate a new point. Will be displayed. The dial 21 is rotated stepwise, and the unlockable locking device 25 is adapted to hold this dial in the final position at which the dial is rotated. In this way, the magnetic disc cartridge is removed from the magnetic recording / reproducing apparatus while the last track recorded is in progress. That is, the dial 21 is prevented from inadvertent rotation when the magnetic disk cartridge is handled, packaged or shipped.

In the illustrated embodiment, the releasable lock device 25 is formed with an elastic pawl 25b, which ends at the protrusion 25a, which is between the adjacent teeth of the gear member 24. Can be fitted to The pawl 25b is integrally formed with the mounting portion 25c, which may be made of a suitable plastic. The mounting portion is configured to be mounted on the inner surface of the upper wall 2a of the jacket. Screw 26 may be used as a suitable mounting element. Instead, a mounting pin integrated with the inner surface of the upper wall of the jacket 2 may be formed, and the mounting portion 25c includes a suitable opening, which is fitted with the mounting pin to fit the mounting portion.

The elastic pole 25b engages the protrusion 25a with the teeth of the gear member 24. Since the gear member is rotationally driven (described), the movement of the teeth deflects the pawl 25b to temporarily remove the projection 25a from between the teeth. As will be described later, the dial 21 is rotated to rotate the gear 24 in response to the tooth passing through the projection 25a on one side. After the tooth passes once, the protrusion 25a is pinched between the adjacent teeth of the gear member 24 again. Thus, the dial 21 proceeds to rotate by the same distance as the angled interval between adjacent teeth of the gear member when one circular track is recorded on the disc 3. When the next track is recorded, the dial 21 advances the gear member again by that amount, and the instructions 23 are stepped to display the number of tracks of the already recorded information signal.

As shown in FIG. 4, the opening 22 of the dial 21 is shaped like a keyhole, so that the guide 23 is formed with a recess or an extended notch in the opening. That is, the extension opening 22 is formed in the guide 23, and this extension opening is referred to herein as a recess. The purpose of the installation of this cabinet can be easily understood with reference to FIGS. 6 and 7.

When the magnetic disk cartridge 1 is loaded in a magnetic recording / reproducing apparatus and an appropriate holder (not shown), the drive shaft 30 having the radial projection 31 is inserted into the opening 22. As clearly shown in FIG. 6, the projection 31 is received in the recess 23. The drive shaft 30 is partly wrapped in a collar or sleeve 32. The drive shaft 30, together with the projection 31, is to be moved in the vertical direction or its axial direction as can be seen in FIG. Thus, the drive shaft 30 can be moved relative to the collar 32. As will be explained, when the drive shaft moves in the axial direction, the protrusion 31 and the recess 23 are properly engaged. When combined in this way, the recording / playback apparatus is operated to rotate the disc 3 and the information signal is recorded through the window 4 on each track. The magnetic head of the recording / playback apparatus is mechanically linked to the drive shaft 30. This magnetic head is disposed on each track on the disc 3 when the projection 31 is inserted into the recess 23. Thus, when the drive shaft 30 rotates, the cock head is mechanically interlocked so that the position of the head is changed radially so that other tracks on the disc are recorded. Therefore, the projection 31 must be engaged with the recess 23 for recording.

In a recording and reproducing apparatus in which a magnetic disk cartridge is used, the drive shaft 30 is usually biased to an initial state or an initial angular position such that the projection 31 is on the opposite side of "0" of the display scale plate 28. However, if one or more tracks are recorded on the magnetic disk embedded in the magnetic disk cartridge inserted into the recording / reproducing apparatus, the recess 23 is not aligned with or aligned with the projection 31, so that the magnetic disk cartridge is loaded. The dial 21 comes into contact with the projection 31 to press the drive shaft 30 in the collar 32. When the drive shaft 30 is pressed, the drive motor acts to drive the collar 32 and the drive shaft 30 and the protrusions 31 to rotate, and the magnetic head moves from one track to the next track along the disc 3. Will proceed. When the drive shaft 30 is properly driven so that the protrusion 31 is aligned with the recess 23, spring force is applied to the drive shaft in an upward direction so that the protrusion is inserted into the recess, so that the above-described drive motor is not operated. As a result, the protrusion 31 is engaged with the dial 21 to properly drive. Moreover, the magnetic head is arranged on the opposite side of the appropriate track on the disk 3. In this way, the recording operation can be started. When the recording operation is completed, the collar 32 is driven by the above-described drive motor to rotate the drive shaft 30 and the protrusion 31 so that the dial 21 advances so that the recess 23 is the last track recorded. It stops at number. Further, the process proceeds to the magnetic head and is arranged on the next track on the magnetic disk 3 to perform recording.

It can be seen that the collar 32 is rotatably driven by an angular distance corresponding to the separation angle between adjacent teeth of the gear 24. Thus, the dial 21 is rotated one by one after the track is recorded. That is, each distance between adjacent teeth of the gear 24 becomes proportional to the angular distance between the displays on the display scale plate 28, whereby the display of the number of recorded tracks is increased stepwise.

From the above, the recess 23 of the dial 21 not only functions to accommodate the projection 31 of the drive shaft 30 but also displays the number of tracks recorded on the disc 3. The dial 21 is incrementally rotated stepwise by an angular distance corresponding to the increment on the display scale plate 28. Moreover, the linkage between the drive shaft 30 and the magnetic head functions to prevent writing until the projection 31 is engaged with the recess 23. In this way, new information is recorded in the same track, and information already recorded in the track is prevented from being erased. After the track is recorded, the dial 21 is rotated so that the recess 23 is positioned opposite the next mark on the display scale plate 28. Thus, the dial and the scale display panel cooperate to display the number of tracks recorded on the magnetic disk 3. This mark is similar to the mark of the number of films commonly used in the camera, in which the user can easily know the number of the film and the number of the film remaining after shooting. In other words, the recess 23 cooperates with the display dial 28 to inform the user of the rest of the magnetic disk 3 which can be further recorded.

While the invention is shown and described with reference to suitable embodiments, it will be readily apparent to those skilled in the art that many modifications or variations can be made therein without departing from the spirit and spirit of the invention.

All of the above, or elsewhere, are merely design changes and should all be construed as being included in the appended claims.

Claims (1)

In a magnetic seat jacket in which a magnetic sheet is stored in a jacket case and is magnetically recorded to form a plurality of information signals on the sheet in an annular track, a part of the jacket is provided with a dial 21 and the dial is externally located. A magnetic seat jacket characterized by a configuration in which an opening 22 is provided at the center to enable rotational driving.