JPS6017095Y2 - tape cassette - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tape cassette, and the pressed part is configured by an elastic body that presses and biases the supply reel and the take-up reel. The take-up reel has a protrusion formed approximately in the center of the reel, and a recess formed around the protrusion. By adopting a flat plate-like structure with no recesses formed around the reel, the pressure balance by the elastic body is good, and in particular, the supply reel has no elasticity even though it is vertically displaced by the reel disk. The pressure balance of the supply side reel due to the repellent body is good, and the take-up side reel is hardly displaced in the vertical direction, so the structure of the pressed part can be simplified and the tape can be manufactured at low cost. The purpose is to provide cassettes.

Figures 1a, b, c, and d are smaller cassettes than standard type cassettes, which are used when attached to a recording/reproducing apparatus such as a standard type video tape recorder, for example, tapes used when attached to a portable type recording/reproducing apparatus. These are a plan view, a side view, a rear view, and a bottom view of a small-sized cassette with a small amount. Fig. 2 is a plan view of the small-sized cassette with the upper half removed, Fig. 3 is a cross-sectional view, and Figs. 4 and 5. and FIG. 6 are partially enlarged explanatory views of the small cassette.

In the figure, A is a small cassette, and this small cassette A
The frame body consists of an upper half 1, a lower half 2, and a front cover 3 for protecting the tape, and the front cover 3 is made of a resin such as polypropylene with a thin bottom part to form a hinge part. The front cover 3 is normally biased in the closing direction by the action of the leaf spring 5 and attached to the upper half 1.

A hole 6 is formed in the lower half 2, and a projection 7 is formed in the front lid 3.
is formed, and when the front M3 is closed, the protrusion 7 is engaged with the hole 6, and the front lid 3 is locked.

By pressing the protrusion 7 and moving it backward, the locked state between the protrusion 7 and the hole 6 is released, and the front M3 can be rotated and opened against the repulsive force of the leaf spring 5. ing.

A supply reel 8 and a take-up reel 9 are arranged in this small cassette A, and the distance between the supply reel 8 and take-up reel 9 is such that it cannot be installed with only this small cassette A. The distance is shorter than the distance between the supply side and take-up side reel disk of a standard type recording/reproducing device.

The magnetic tape 10 is arranged so that it runs along a predetermined running path between the supply reel 8 and the take-up reel 9.

That is, the magnetic tape 10 passes from the supply reel 8 through the guide poles 11 and 12 and is wound onto the take-up reel 9.

An uneven groove 14 is formed on the lower surface of the lower flange 13 of the supply reel 8.
is formed, and the uneven groove 1 of this lower flange 13 is formed.
An uneven groove 15 that can engage with the uneven groove 14 is also formed at a predetermined position of the lower half 2 corresponding to the upper half 1, and normally the supply side reel 8 is It is biased toward the lower half 2 side, and the uneven grooves 14 and 15 mesh with each other to fix the supply reel 8 and prevent the magnetic tape wound on the supply reel 8 from loosening.

The structure of the pressing portion of the supply reel 8 and the take-up reel 9 by the plate spring 16 is such that the upper flange 8' of the supply reel 8 is attached to the main body of the supply reel 8 by, for example, welding. The upper flange 8' has a protrusion 8" projecting from the center thereof, and the upper flange 8' around the protrusion 8" has a concave shape. In addition, in the take-up reel 9, a flat upper flange 9' is fixed to the take-up reel body by, for example, welding.
A projection 9'' is formed protruding from the center of the plate spring 16, and the ends of the leaf spring 16 abut against the projections 8'' and 9'' to move the supply reel 8 and the take-up reel 9 to the lower half 2. It is biased towards the side.

Incidentally, when the small cassette is installed in the recording and reproducing device, this supply side reel 8 is connected to the supply side reel disk 8 of the recording and reproducing device.
0, the half 1 side is lifted by a specified amount against the repulsive force of the leaf spring 16, and the engagement between the uneven grooves 14 and 15 is released.

In other words, the lower half 2 at the position corresponding to the supply reel 8
is formed with a hole 17 for inserting a supply reel disk 80 of the recording/reproducing device, and the supply reel disk 80 is inserted into the reel disk insertion hole 8'' formed at the bottom of the supply reel 8. will be done.

Therefore, even if the supply reel disk 80 is not inserted into the supply reel and the supply reel 8 is in the lower position,
Or even if the supply reel disk 80 is inserted into the supply reel 8 and the supply reel 8 is lifted upward,
The contact portion between the supply side reel 8 and the leaf spring 16 has a concave shape around the protrusion 8'', so the leaf spring 16 contacts only the top of the protrusion 8'', and the supply side by the leaf spring 16 The pressing balance of the reel 8 will not be lost.

Furthermore, unlike the supply reel 8, the take-up reel 9 is not configured to be vertically displaced.
Even if the upper flange does not have the same shape as the upper flange of the supply side reel 8, the pressure balance by the leaf spring 16 can be sufficiently achieved, and the upper flange 9' can simply be a flat plate, so the structure is simpler. It is also easy to install.

The take-up side rule 9 is inserted into a shaft 18 fixed to the lower half 2, and is rotatable about this shaft 18.

The shaft 18 can be attached to the lower half 2, for example.
A groove 19 is formed in the lower part of the lower half 2, and a protrusion 20 that fits into the groove 19 is formed on the lower half 2, and with the protrusion 20 fitted in the groove 19, the screw 21 is If the shaft 18 is screwed onto the lower half 2 by means of screwing, etc., the shaft 18 will not spin idly during screwing, so it can be easily attached.

Teeth 23 are formed on the outer periphery of the lower 7 langes 22 of the take-up reel 9, and cutouts 24 are provided at predetermined locations on the lower half 2 so that gears, for example, can be engaged with the teeth 23.
The take-up reel 9 is rotated by a predetermined driving force transmission mechanism such as a gear that meshes with the teeth 23, and the magnetic tape is transferred from the supply reel through a predetermined running path to the take-up reel. It will be rolled up.

This take-up reel 9 is provided with a brake mechanism so that the take-up reel 9 does not rotate when the small cassette A is not installed in the recording/reproducing device.

This brake mechanism includes, for example, a pawl 25 that engages with teeth 23 of the lower flange 22 of the take-up reel 9.
is inserted into the shaft 26 of the lower half 2, and when it is pressed and biased by the action of the spring 27,
The pawl 25 hooks onto the teeth 23 of the lower flange 22, and the winding side -
The magnetic tape 9 does not rotate and the magnetic tape does not loosen.

In order to release this latched state and allow the reel 9 to rotate several times, a pin is inserted through the hole formed in the lower half 2, and the pin is used to push the claw 25 against the repulsive force of the spring 27. The claws 25 and the lower flange 22 of the take-up reel 9 are lifted, and the take-up reel 9 becomes free and can rotate.

Note that the upper and lower halves of the small cassette are provided with a recess and a protrusion for latching at the joining end of the upper and lower halves. Temporarily fasten the halves and firmly connect the two with screws.

FIGS. 7, 8, 9, and 10 are explanatory diagrams of an adapter used when the above-mentioned small cassette A is attached to a standard type recording/reproducing apparatus.

In the figure, B is an adapter that can accommodate the small cassette A inside and has a size and shape that can be attached to a standard type recording/reproducing device.

The frame of this adapter B consists of a lower half 51 and an upper half 52.
The lower half 51 is formed with a storage section 53 which is a notch for storing a small cassette A.

This housing section 53 has protrusions 54, 55, 56, 57 formed at its ends to support the small cassette A, and the lower half 2 of the small cassette A has protrusions 54, 55, 56, 57 formed thereon.
．． Concave portions 28, 29, 30, and 31 are formed corresponding to the positions of 57, and these protrusions and concave portions are used to position the small cassette A, particularly in the vertical direction.

When these protrusions and recesses are fitted, the bottom surface of the small cassette and the bottom surface of the adapter are made to be substantially on the same plane.

In addition, pins 58 and 59 are implanted in the protrusions 54 and 55, and these pins 58 and 59 are connected to the lower half 2 of the small cassette A.
are inserted into the holes 32 and 33 formed in the pin 5, which further positions the small cassette A.
8 also serves to release the brake of the take-up reel 9 of the small cassette A.

That is, the position of the pin 58 and the hole 32 is such that the pin 58 is in the hole 3
2, the take-up reel 9 of the small cassette A
This position is such that the pin 58 lifts the pawl 25, which is the brake mechanism of the motor.

When adapter B with small cassette A inserted is attached to a standard type recording/playback machine, the supply side reel disk of the two reel disks of the recording/playback machine is small cassette A.
However, since the take-up reel disk cannot be inserted into the take-up reel 9, the adapter B is inserted at the position corresponding to the position of the take-up reel disk. A gear 60 is attached to the lower half 51, into which a take-up reel disk is inserted and driven.

Also, when storing small cassette A in adapter B,
A gear 61 that meshes with the teeth 23 of the lower flange 22 of the take-up reel 9 of the small cassette A is attached to the lower half 51 so as to mesh with the gear 60, and the state of engagement between the claw and the teeth is determined by the pin 58. Since it is released, the driving force of the recording/reproducing machine is transmitted to the supply reel 8 and take-up reel 9 of the small cassette A, and the magnetic tape starts to run.

That is, even if you try to install the small cassette A into a standard type recording/playback machine, the relative positions of the supply side reel and the take-up side reel of the small cassette A will be the same as the supply side reel disk and the take-up side of the record/playback machine. For example, if the supply reel disk is placed on the supply reel, a gear similar to that of the take-up reel is provided at the position of the take-up reel disk, and this gear and the small cassette By disposing a driving force transmitting means between the take-up reel and the take-up reel, the driving force of a standard type recording/reproducing machine can be transmitted to the small cassette A.

Also, on both shoulders of the upper half of the small cassette A, there are notches 34.
35 is formed, and the upper half 5 of the other adapter B7
2 has walls 62 and 63 corresponding to the positions of the notches 34 and 35.
is formed, and by aligning the lower half 51 and the upper half 52 and tightening the screws, for example, the small cassette A will not come out from the adapter B, and furthermore, the top surface of the small cassette and the top surface of the adapter will be connected. are almost on the same plane.

When using the above-mentioned small cassette A by attaching it to a recording/playback device exclusively for small cassettes, such as a portable type recording/playback device, □ means that a standard type cassette should be attached to the standard type recording/playback device. When the small cassette is inserted into the pop-up mechanism of the recording/reproducing device and the pop-up mechanism is moved to the operating position, the front lid of the small cassette A opens and the small cassette A opens.
Notches 36 and 37 formed in the front and bottom parts of
, 3B, the loading pole, capstan, etc. of the recording/reproducing device are inserted inside the magnetic tape, the supply reel disk of the recording/reproducing device is fitted to the supply reel of the small cassette, and the adapter of the recording/reproducing device is inserted. The teeth of the lower flange of the take-up reel mesh with the drive force transmission mechanism to the take-up reel, such as a gear at B, so that the driving force of the recording/reproducing device is also transmitted to the take-up reel.

Furthermore, a recess 2 formed in the lower half 2 of the small cassette
The convex part of the recording/reproducing device matches 8, 29, 30. 31,
In addition, the pins of the recording and reproducing device are inserted into the holes 32 and 33 of the lower half, and the position of the small cassette A is regulated within the recording and reproducing device, and the lock state of the take-up reel of the small cassette A by the claw is released. , the magnetic tape is maintained in a runnable state.

Then, the magnetic tape is fed out in a small cassette by a loading pole, is tensioned to the magnetic head, and driving force is transmitted to the take-up reel so that the magnetic tape runs along a predetermined running path, and recording and reproduction are performed.

In addition, when using this small cassette A with a standard type recording/playback device, attach the small cassette A to the adapter B, and then attach this adapter B to the recording/playback device in the same way as when using a standard type cassette. Perform recording and playback.

That is, first, store the small cassette A in the storage section of the adapter B with the front lid of the small cassette A opened, and
In this stored state, the magnetic tape wound on the supply reel is opened to the small cassette A, and a predetermined amount is pulled out from the front lid, and the magnetic tape is pulled out from the guide poles 64, 65, 66 provided on the adapter B. , distribute the magnetic tape in the same way as the magnetic tape in a standard type cassette, align the upper half of adapter B with the lower half, and screw them together.

Since the small cassette A stored in the adapter B is the same as a standard type cassette, it can be used for recording and reproducing by installing it in a standard type recording and reproducing machine.

That is, when a small cassette is attached to the adapter, the adapter gear 61 meshes with the teeth of the lower flange 22 of the take-up reel 9, and the pin 58 of the adapter lifts the pawl 25 against the repulsive force of the spring, causing the winding to take place. The lock state of the take-up reel 9 is released, and the driving force of the take-up reel disk is transmitted to the take-up reel 9 via the gears 60 and 61.

Conversely, when the small cassette is removed from the adapter, the take-up reel 9 and the gear 61 are disengaged and the pin 58 is removed from the small cassette, so the claw 25 is restored by the repulsive force of the spring 27. The take-up reel 9 is in a locked state.

To attach the magnetic tape in the small cassette to the guide pole of the adapter, for example, press the supply reel directly with your hand to release the locked state of the supply reel, and then open the front cover of the magnetic tape. Attach the small cassette to the lower half of the adapter by hand, and attach the pulled-out magnetic tape to the guide pole of the adapter directly by hand, or attach the unlocked magnetic tape to a suitable location. It can be attached using a pull-out mechanism.

Also, if the gear 61 is configured so that there is a little degree of freedom in position setting, the gear 61 can be moved when attaching or removing a small cassette to the adapter. It is arranged so that it can mesh with the teeth of the lower flange of the take-up reel (this makes it convenient to attach and take out the small cassette to and from the adapter).

As described above, the tape cassette according to the present invention has a recess formed around the approximately central protrusion on the upper surface and a reel disk insertion portion on the lower surface, and the supply reel is inserted into the hole formed at the bottom of the cassette case. In addition, a take-up reel, which has a protrusion formed approximately in the center of the top surface and no recess around it, is inserted into a shaft fixed to the lower part of the cassette case, and the supply side Since an elastic body is disposed to urge downward approximately the center portion of the upper surface of the reel and the take-up reel, the pressure balance of the supply side reel and the take-up reel by the elastic body is good. In particular, the supply reel has an excellent pressure balance due to the elastic body even though it is displaced vertically by the reel disk, and the take-up reel has almost no vertical displacement, so the pressed part The structure is extremely simple, and since the supply reel is directly driven by the reel disk, tape feeding accuracy is high, and the take-up reel is positionally regulated by a fixed shaft and an elastic body, so the take-up reel is It has the advantage that there is very little wobbling of the reel.

[Brief explanation of the drawing]

Figures 1a, b, c, d and Figures 2 to 6 are explanatory diagrams of embodiments of the tape cassette according to the present invention, and Figures 7 to 1.
FIG. 0 is an explanatory diagram of an adapter that accommodates a tape cassette. A: Small cassette, B: Adapter, 1: Upper half, 8: Supply reel, 8': Upper flange , 8'' protrusion, 8'' reel disk insertion hole, 9...take-up side reel,
9'...Top flange, 9"...Protrusion,
10...magnetic tape, 16...plate spring, 17...hole, 18...shaft, 80...
...Supply side reel disk.

Claims (1)

[Scope of utility model registration request] A supply reel having a concave portion formed around the protrusion approximately at the center of the upper surface portion and a reel disk insertion portion formed at the lower surface portion is disposed corresponding to the hole formed at the bottom of the cassette case. A take-up reel, which has a protrusion on its side and no recess around it, is inserted into a shaft fixed to the lower part of the cassette case, and the reel is placed approximately at the center of the upper surface of the supply reel and the take-up reel. A tape cassette characterized by having an elastic body that urges a protrusion downward.