JPS63164082A - Tape cassette - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Application in Industry-1-] The present invention relates to a tape cassette whose outer shape is formed so as to be compatible with a floppy disk and whose recording chamber Fa is enlarged, and in particular to a tape cassette which has an increased recording chamber Fa. This is related.

[Summary of the invention]

The tape cassette of this invention is [-)\-fu and t/\-
A center core, a transmission mechanism, a supply reel, a take-up reel, and a magnetic tape are placed in a 4L cartridge formed by a center core, a transmission mechanism, a supply reel, a take-up reel, and a magnetic tape.
A plurality of tape guides are provided to guide the magnetic tape along a non-recording space, and a recess is provided to maintain the magnetic head of the magnetic recording/reproducing device located on the non-recording surface side of the magnetic tape in a non-contact state with respect to the magnetic tape. By providing it in the upper half, it is possible to prevent wear on the recording/reproducing surface of the magnetic head located on the non-recording surface side of the magnetic tape, thereby extending its life.

[Conventional technology]

A floppy disk is constructed such that a flexible magnetic disc is housed in a flexible cartridge, and the magnetic disc is rotated to record and reproduce signals.

Therefore, floppy disks are compact in shape and can quickly write or read high-density data, so they are used in various OA devices including microcomputers.

FIG. 2 is a perspective view showing an example of such a floppy disk, in which a magnetic disc is rotatably housed in a biased space inside a cartridge in which a first half H and a lower half H2 are overlapped. A shutter S for opening and closing an opening K through which the magnetic head (pad) comes into contact with the magnetic disc is attached to one end.

In such a floppy disk, recording tracks are formed in the circumferential direction of the magnetic disk, so the access time is fast, but there is a problem that the recording capacity becomes insufficient, especially when the diskette becomes small.

Therefore, we developed a tape cassette with a large recording capacity that is compatible with floppy disks as described below.

Hereinafter, such a tape cassette (Japanese Patent Application No. 18988
7) will be explained.

FIG. 4 is a plan view showing the tape cassette, and the portion below the break line R shows the inside of the cartridge with 1] half lOb removed. Further, FIG. 4 shows a sectional view taken along the center line LL in FIG. 3.

In these figures, 10 is the same size below/\-7l0
A cartridge formed by overlapping a and an upper half lOb is shown.

The dimensions of the cartridge 10 on the left side of the dashed line Q are the same as, for example, a 3.5-inch floppy disk cartridge.

The lower half lOa is provided with a drive hole 10A in the center of the shank, through which the center core 1 for driving engages with the rotating shaft of the motor. Like a floppy disk cartridge, an opening 10B is formed through which a magnetic head (pad) faces.

IOC is a protrusion provided to identify this tape cassette and a conventional floppy disk, as will be described later, and IOD and 10D are dowel holes for positioning.

Reference numeral 10E indicates a dome portion formed to cover a tape reel and a rotation mechanism, which will be described later.

10 F+, 10 F2 are the upper and lower half 10a+1
The detection holes 10F+ and 10F2 are provided to allow 1T of 0b to pass through, and the running state of the tape is monitored through the detection holes 10F+ and 10F2.

Reference numeral 1 denotes a center core which is rotatably attached to the inner surface of the upper half lOb facing the drive hole 10A through, for example, an oil-less metal, and a rotary drive shaft of a magnetic recording/reproducing device is installed in the center of the center core l. Shaft hole I where abutting
A hole IB is provided where the drive pin is connected to the hole IB, and a concave flange IC is formed on the outer periphery of the hole IB so that the timing belt 2 is wound around it.

One end of the toothed timing belt 2 is connected to a pulley 3 which is supported by a shaft P1 as shown in FIG. 5, and a gear 3A carved in this pulley 3 is supported by a shaft P2. It is formed to match the oscillating gear 4 by +$1.

Reference numeral 5 designates a swing plate whose one end is loosely fitted to the shaft P1, and the other end is connected to the swing gear 4 via a clutch mechanism consisting of a slip plate 4A and a spring coil 4B.

Such a transmission mechanism, as seen in the forward/reverse mechanism of a tape recorder, changes the direction of rotation of the oscillating plate 5 depending on the rotational direction of the pulley 3.
is driven left and right to control the oscillating gear 4 to mesh with the adjacent southeast (bevel gear) 6a or 6b.

A bevel gear 7a is pivotally supported by a shaft 9 substantially orthogonal to the bevel gear 6a, and drives a supply reel 8a around which tape ti is wound.

The tape 11 pulled out from the supply reel 8a is moved around the tape guides 12a and 13a in a flat state in the uneven space inside the cartridge 10.

14a, 15a, 16a, and 17a, and the tape guide 1 is attached to a take-up reel 8b (not shown).
2b, 13b, 14b, 15b.

It is guided back at 16b and 17b.

18 is the opening 10B of the lower halves 10a and 10b as described above.
A sliding shutter configured to block the
This shutter 18 is controlled in a manner similar to that used in known floppy disks.

This tape cassette has the above-mentioned structure, so when the center core l rotates normally (in the direction of the arrow), the pulley 3 rotates via the timing belt 2, as is well known. oscillating gear 4 and oscillating plate 5
oscillating gear 4 and bevel gear 6 to swing in the direction of the arrow.
b mesh with each other, and the take-up reel 8b rotates via a bevel gear 7b (not shown). Therefore, tape 11
is pulled out from the supply reel 8a in the direction of the arrow, is turned approximately 90 degrees by the tape guide 15a at the corner, and then moves to the tape guide 16a.

The position is regulated by 17a (16b, 17b), and the opening 1
It passes through the first part 10B and is turned approximately 90 degrees at a tape guide 15b located at a corner (not shown), and the dome ff
Take-up reel 8 located in 1l OE
It is wound up on b.

Further, when the center core 1 is reversed (in the opposite direction to the direction of the arrow), the oscillating gear 4 and the bevel gear 6a are in mesh with each other, and the tape 11 similarly pulled out from the take-up reel 8b is transferred to the supply reel 8a. It is wound up.

Therefore, when the tape 11 is brought into narrow contact with the magnetic head and the pad facing the opening 10B from below -1 of the cartridge 10, as seen in a normal floppy disk recording/reproducing device, the tape 11 is brought into close contact with the pad by the magnetic head.
It is possible to record signals in the running direction (longitudinal direction) of the tape 11, or to generate ILF signals recorded on the tape 11.

In this case, if the width of the tape 11 is set to about 3/4 inch, the number of tracks formed in the long direction can be set to about 80, corresponding to a 3.5 inch floppy disk.

However, since the recording medium of this tape cassette has been converted from a disk to a tape, the recording capacity of one track is several ten times that of a disk.
If the length is set to 2 m, one tape cassette can store approximately 20 Mbytes of recording space. Therefore, it can be used as a backup memory for hard disks, and can also be applied to filing systems that require large amounts of data.

[Problem that the invention seeks to solve]

'' When a double tape cassette is installed in a magnetic recording/reproducing device, the opening 10 at the bottom of the cartridge 10 will open.
The tape 11 is held between the magnetic head facing B and the pad to obtain head contact.

However, as shown in FIG. 5, in order to enable the magnetic recording and reproducing device to record and reproduce data on both sides of the floppy disk, two magnetic disks El and E7 are attached to the head mounting plates T I and T2 so that the upper and lower sides of the floppy disk can be recorded and reproduced. In the case of the configuration provided in the above, for example, there is a problem that the recording/reproducing surface of the magnetic head E2 that comes into contact with the back coat surface of the tape 11 is significantly abraded by the back coat agent, and the life of the magnetic head E2 is shortened. .

The present invention provides a tape cassette that solves the above problems.

[Means for solving problems]

The tape cassette of the present invention is such that when the tape cassette is installed in the magnetic recording + lj recording device, the magnetic head of the magnetic recording/reproducing device located on the non-recording side of the magnetic tape is in a non-contact state with the magnetic tape. A recessed portion for supporting the head mounting plate is provided in the upper half.

[Effect]

In the tape cassette of the present invention, the magnetic recording/reproducing device located on the non-recording surface side of the magnetic tape; the magnetic head 4 is supported in contact with the magnetic tape; The magnetic head located on the recording surface side can be maintained not to contact the magnetic tape, and the recording/reproducing surface of the magnetic head can be prevented from being worn out by the back coating agent of the magnetic tape.

〔Example〕

FIG. 1 is an enlarged sectional view of the opening portion of a cassette tape according to an embodiment of the present invention, and is the same as FIGS. 3 to 5.
indicate the same or equivalent part.

In this figure, lOG indicates a recess provided in the upper half tab, and the width of this recess 10G is the magnetic herad E2.
, and smaller than the width of the head mounting plate T2.

Reference numeral 20 denotes a guide board (Utility Application No. 1989-1994) for regulating the running of the tape 11 of the tape cassette.

Reference numeral 21 indicates a leaf spring having, for example, a gimbal structure, which is attached to the guide substrate 20, and a pad 22 is attached to the tape 11 side.

In the tape cassette of the present invention, since the recess 10G is provided in the -1 half tob as described above, even if the magnetic head E2 descends to sandwich the magnetic head E1 and the tape 11, the head mounting plate T2 collides with the upper half IOB, and the magnetic head E2 abuts the tape 11 and the upper half ta.
b in a non-contact manner. And lower half loa
Magnetic head E1 and pad 22 viewed from opening 10B
The tape 11 is sandwiched between the pads 22, and the pad 22 provides head contact, allowing recording or reproduction.

Therefore, the recording/reproducing surface of the magnetic helad E2 is tape 1
Since the recording/reproducing surface of the magnetic helad E2 is not in contact with the back coated surface of the magnetic helad E2, the recording/reproducing surface of the magnetic helad E2 is not worn out by the backcoat agent, and the life of the magnetic helad E2 is extended.

Note that the pad 22 is similar to the tape guides 15a and 1 in FIG.
5b or the tape cassette previously proposed by the present applicant (Utility Application No. 199945/1989) in which there is tape back tension caused by the tape 11 being wound around the two inclined guides, this can be omitted.

〔Effect of the invention〕

As explained below, the tape cassette of the present invention has a recess in the upper half so that the magnetic head of the magnetic recording and reproducing device located on the non-recording side of the magnetic tape is supported without contacting the magnetic tape. As a result, during recording or reproduction, the magnetic head located on the non-recording surface side of the magnetic tape is supported with the recording/reproducing surface not in contact with the magnetic tape, and the recording surface is prevented from being worn out by the back coating agent of the magnetic tape. It has the effect of preventing 1F and extending the lifespan.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a tape cassette which is an embodiment of the present invention, Fig. 2 is a perspective view of a floppy disk, Fig. 3 is a top view of the tape cassette, and Fig. 4 is the center v; A of Fig. 3.
A sectional view taken along line L-L and FIG. 5 are explanatory views. In the figure, 1 is the center core, 2 is the timing belt, 3 is the pulley, 3A is the gear, 4 is the oscillating gear, 4A is the slip plate, 4B is the spring coil, 5 is the oscillating plate, 6a, 6b
and 7a is a bevel gear, 8a is a supply reel, 8b is a take-up reel, 9 is a shaft, IO is a cartridge, 10
a, 10b are the upper and lower halves, IOC is the recess, 11 is the tape, 12a N17a and 17b are the tape guides, E
1 and E2 indicate magnetic heads, and TI and T indicate head mounting plates.

Claims (1)

[Claims] A center core is placed approximately in the center of a flat space surrounded by an upper half and a lower half, and is chucked to a rotational drive shaft of a magnetic recording/reproducing device, and a transmission is connected to this center core via a timing belt. a supply reel and a take-up reel arranged on both sides of the transmission mechanism so that rotational force is transmitted through the transmission mechanism; and a magnetic tape pulled out from the supply reel in the flat space. and a plurality of tape guides for returning the tape to the take-up reel after circulating along the magnetic tape. A tape cassette characterized in that the upper half is provided with a recessed portion for maintaining the contact state.