JPS6112624Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is designed so that, for example, a tape cassette smaller than a standard type is small enough to be directly attached to a standard type video tape recorder, etc. For example, for a tape cassette that requires an adapter and requires the tape to be pulled out to form a tape path at a predetermined position on the adapter when attached to the adapter, the notch may be located at a position offset from the center of the side surface of the small tape cassette. It is an object of the present invention to provide a small tape cassette which can be installed in a tape cassette to reliably receive the driving force from a recording/reproducing device through an adapter and which can secure flexibility in designing the adapter.

If you want to use a small tape cassette used in a recording/playback machine such as a video tape recorder in a recording/playback machine that is equipped with a larger tape cassette, such as a standard type tape cassette, you need to use this small tape cassette. You will need an adapter to convert the tape into a standard tape cassette. If the tape running path of a small tape cassette is configured in the same way as the tape running path of a standard type tape cassette, this adapter may simply serve as a housing. Any concave case body that fits into the rear and both sides of the tape cassette may be used. However, tape cassettes whose tape running path is the same as the standard type cannot be made that small because the tape running path is the same, even if the tape cassette is smaller than the standard type. .

Therefore, in order to make a small tape cassette substantially smaller, the tape running path must be different from that of a standard type tape cassette. This cannot be done without reducing the distance between the two. Therefore, when a small-sized tape cassette constructed as described above is used in a standard type recording/reproducing machine, a concave case body that merely serves as a housing for the tape cassette is insufficient. That is, when a small tape cassette is installed, it must be possible to change the tape path of the small tape cassette using an adapter so that it can be adapted to a standard type recording/reproducing machine.

The present invention has been made in accordance with the above object, and one embodiment of the tape cassette adapter according to the present invention will be described below.

Figures a, b, c, and d are smaller than standard type cassettes used when attached to a recording/reproducing apparatus such as a standard type video tape recorder, for example, 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 cassette with a small amount of tape. Fig. 2 is a plan view with the upper half of this small cassette removed, Fig. 3 is a schematic cross-sectional view, and Fig. 4 and Fig. FIG. 5 is a parts diagram and a partially enlarged explanatory diagram of a small cassette.

In the figure, A is the entire small cassette, and the frame of this small cassette A consists of an upper half 1, a lower half 2, and an opening/closing lid 3 for protecting the tape. As shown, it is rotatably attached to the upper front side of the small cassette 1 by a support shaft 4. As shown in FIG.

A sliding piece 7 is pressed by a substantially U-shaped spring 6 inserted into a groove 5a bored in the side surface of the upper half 1 and is held slidably within the groove 5b.
One end of the opening/closing lid 3 abuts the first abutting portion 3a of the opening/closing lid 3, and the opening/closing lid 3 is in the closed lid position shown in FIG. 1b.

At this time, the lower end of the opening/closing lid 3 is in abutment with the front end of the lower half 2.

From this closed state, the sliding piece 7 slides against the spring 6 by rotating the opening/closing lid counterclockwise in FIG.

When the dead point is exceeded, the second abutting portion 3b and one end of the sliding piece 7 abut each other, and the force of the spring 6 is also applied, and the opening/closing lid 3 further rotates, rotates 90 degrees, and reaches the second end. By completely abutting the abutting portion 3b and one end of the sliding piece 7, and by the elastic force of the spring 6, the open/close lid 3 is maintained in the open state.

In this open state, the open/close lid 3 is located at a higher position than the upper end surface of the upper half 1.

The spring 6 can be easily installed and held in the upper half 1 by inserting it into the cut groove 5a from above the cassette.Furthermore, by providing a protrusion 5a on the outer extension of the cut groove 5a, the spring 6 can be easily inserted into the upper half 1. It is possible to easily prevent the spring 6 from coming off.

Furthermore, by making the kerf 5b a kerf that expands in the depth direction and by making the cross section of the sliding piece 7 into a trapezoid corresponding to the kerf, separation can be easily prevented.

A supply reel 8 and a take-up reel 9 are disposed 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 reel disk and the take-up reel disk of a standard type recording/reproducing device.

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

That is, the magnetic tape 10 is
Guide poles 11a, 12a, 11b, 12
It comes to be wound up on the winding side reel 9 through step b. An uneven groove 14 is formed on the lower surface of the lower flange 13 of the supply reel 8, and can also engage with the uneven groove 14 at a predetermined position of the lower half 2 corresponding to the uneven groove 14 of the lower flange 13. An uneven groove 15 is formed, and the supply reel 8 is normally urged toward the lower half 2 by the action of a leaf spring 16 attached to the upper half 1, and the uneven grooves 14 and 15 engage with each other. , supply reel 8
is fixed to prevent the magnetic tape wound on the supply reel 8 from loosening.

FIGS. 4a and 4b are a plan view and an explanatory view of the leaf spring 16. By fitting the protrusion of the upper half 1 into the hole 16a in the center of the leaf spring 16 and welding it,
The leaf spring 16 is fixed to the upper half.

Here, the amount of bending of the leaf spring 16 is determined from the winding side 16b.
The bending amount s of the supply side 16c is larger than the bending amount t of the supply side 16c. For this reason, the elastic force against the supply reel 8 is greater than against the take-up reel 9, which helps regulate the position of the supply reel during recording and playback (furthermore, stabilizes the running of the supply tape when used in a portable device). This has effects such as being able to reliably brake the supply reel when not in use.

When the small cassette is installed in the recording and reproducing apparatus, the supply reel 8 is lifted by the supply reel disk 80 of the recording and reproducing apparatus by a specified amount toward the half 1 side against the repulsive force of the leaf spring 16. The engaged state between the uneven grooves 14 and 15 is released.

That is, a hole 17 for inserting a supply reel disk 80 of the recording/reproducing device is formed in the lower half 2 at a position corresponding to the supply reel 8 . will be done. The take-up reel 9 is inserted into a shaft 18 fixed to the lower half 2, and
It is rotatably provided around a shaft 18.

The shaft 18 is, as shown in FIGS. 1d and 3,
It is implanted in the lower half 2 by a screw 19 passing through the center of the recess 2a at the bottom of the lower half 2.

The lower end surface of the screw 19 does not protrude from the lower end surface of the lower half 2, and protrudes from the surface of the recess 2a.
Therefore, as will be described later, the lower end of the screw 19 can be used as a reference for regulating the position when the small cassette A is inserted into the cassette adapter B.

In the schematic sectional view of FIG. 3, the recess 2a of the lower half 2 is omitted for the sake of simplification, and the details are as shown in FIG. Teeth 23 are formed on the outer periphery, and cutouts 24 are formed at predetermined locations on the lower half 2 so that, for example, gears can be engaged with the teeth 23. As shown in FIGS. 1d and 2, the notch 24, which is the main part of the present invention, is provided at the bottom end of the lower half 2 with the minimum necessary size, and is connected to the supply reel 8 and the take-up reel. It is located at a position offset from a line passing through the center of the side reel 9. Also, the notch 24
As will be described later, when attaching the small cassette A to the adapter B, the gear 6 transmits the driving force of the standard type recording/reproducing machine to the take-up reel 9 of the small cassette A.
Accept 1. Furthermore, the size of the notch 24 to receive the gear 61 at the biased position is set to the minimum necessary size, which prevents dirt and the like from entering.

Furthermore, the lower end of the gear teeth 23 on the peripheral edge of the lower flange has a ninth
As shown in the figure, a taper is formed at the lower end of the tooth. As will be described later, the teeth of the drive gear of the cassette adapter B have a similar taper formed at the upper end to facilitate meshing of both teeth.

Then, the take-up reel 9 is rotated by a predetermined driving force transmission mechanism such as a gear that meshes with the teeth 23.
The magnetic tape passes through a predetermined running path from the supply reel and is wound onto the take-up reel.

This take-up reel 9 is provided to prevent the take-up reel 9 from rotating when the small cassette A is not installed in the recording/reproducing device, and to prevent the take-up reel 9 from rotating when the small cassette A needs to be fed out. A brake mechanism is provided so that the magnetic tape can be easily and easily fed out without damaging it.

This brake mechanism is shown in FIGS. 2 and 5, for example.
Figure (Figure 5 shows the second half with the upper half attached.
As clearly shown in FIG. When inserted into the shaft 26 and biased by the action of the spring 27, the brake 2
The shoe portion 25a of No. 5 contacts and presses the upper surface of the peripheral edge of the lower flange 22, so that the take-up reel 9 does not rotate and the magnetic tape does not loosen.

In order to release this braking state and allow the take-up reel 9 to rotate, a pin is inserted through the hole 32 formed in the lower half 2, and the other end 25b of the brake 25 is controlled by this pin. spring 27
By lifting the shoe part 25a of the brake 25 away from the upper surface of the peripheral edge of the lower flange 22 of the take-up reel 9, the take-up reel 9 becomes free and can rotate. become.

With this configuration, both the tape cassette and the take-up reel are braked when not in use, and the magnetic tape does not loosen inside the small cassette even during transportation, and it is also easy to use in a recording/reproducing device. Sometimes both brakes are released.
Furthermore, as will be described later, when using with a cassette adapter, by opening the opening/closing lid of the small cassette and pulling out the magnetic tape, the upper surface of the peripheral edge of the lower flange 22 of the take-up reel and the shoe part of the brake 25 are connected. Since the magnetic tape 25a slides without damaging the magnetic tape or releasing the brake mechanism, the magnetic tape can be easily pulled out from the small cassette with good operability.

In addition, the take-up side brake mechanism is assembled by integrally molding it into the lower half after installing the take-up reel 9 on the lower half 2 (or immediately after inserting the lower flange in the process of installing the take-up reel 9). Insert the brake 25 into the shaft 26, and insert the coil spring 27 into the shaft 2.
6 and then attaching the upper half to hold the spring 27 and complete the assembly, making it easy to assemble.

In addition, in the upper half and lower half of the small cassette,
A locking recess and a protrusion are formed at the joint end of the upper half and the lower half, and the upper and lower halves are temporarily fastened by fitting the protrusion and the recess, and then screwed together. Strongly connect the two.

In addition, as clearly shown in Figure 1 b, c, and d, the bottom of the small cassette A has a length from the front and rear surfaces.
Notches 2l ₁ and 2l _{2 are provided where l 1 and l 2 are} different, and l ₁ > _{l 2 .}

The lower end of the opening/closing lid 3 is also provided at the same height as the notch _2l1 , and the upper surface of the small cassette has no notch on the front and an arcuate notch _1l3 on the rear. ₁ > l ₃ .

Therefore, when a small cassette is inserted into a recording/playback device, the protrusion provided on the cassette housing will be inserted into the notch 2 only when the small cassette is inserted correctly.
_l1 , and the protrusion on the incorrectly inserted side abuts the notches _2l2 , _1l3 of the cassette half, making it impossible to completely install the small cassette.

Figures 6 to 10 show the aforementioned small cassette A.
FIG. 2 is an explanatory diagram of an adapter used when attaching a standard type recording/reproducing device.

In the figure, reference numeral B designates an adapter that can accommodate the small cassette A therein and has a size and shape that allows it to 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, and the lower half 51 has a storage section 53 for storing the small cassette A.
This housing section 53 has protrusions 54 and 55 for regulating the position of the small cassette A formed at its ends, and the protrusions 54 and 55 on the lower half 2 of the small cassette A, respectively.
Recesses 28 and 29 are formed corresponding to the positions of 55, and the screw 19 protruding into the bottom recess 2a of the small cassette A is inserted into the tapered center of the annular holder 56 as shown in FIG. It is inserted into the hole 56a, and the protrusion 56b of the annular holder 56 abuts against the recess 2a. These convex portions and concave portions are used to position the small cassette A, particularly in the vertical direction.

Further, pins 58 and 59 are implanted in the protrusions 54 and 55, and these pins 58 and 59 are connected to the small cassette A.
It is inserted into the holes 32 and 33 formed in the lower half 2 of the. The horizontal positioning of the small cassette A in the adapter B is such that the screw 19 of the small cassette A enters the tapered center hole 56a of the annular holder 56, and the pin 58 of the protrusion 54 is inserted into the long hole of the small cassette A. This is done by entering 32. pin 58
serves to release the brake of the take-up reel 9 of the small cassette A. That is, the positions of the pin 58 and the hole 32 are such that, as clearly shown in FIG. This is the position where the holder 58 lifts it up.

101 and 102 are the upper half 52 of the adapter B
Reference numeral 103 denotes the opening and closing cover of the cassette adapter B, which is attached to the upper half 52 by a spring 105 which is always biased in the closing direction around a support shaft 104. Reference numeral 106 denotes a lever which is fixed to the support shaft 104 and has inclined cam surfaces 106a and 106b. When the upper half 52 is closed,
When a protrusion 107 fixed to the lower half 51 comes into contact with the inclined cam surfaces 106b, 106a, etc.,
This operation causes the opening/closing cover 103 to open and close slightly.

When the lid of the upper half 52 is closed, as shown in FIG. 7 (a sectional view taken along the line in FIG. By being engaged with a notch 109 provided on the side surface of the half 51, the upper and lower halves of the adapter B are locked in the closed state.

This lock can be easily released by pressing the protrusion 110 on the side surface of the lower half 52 inward. 111 is a protrusion 110 integrally molded with the upper half 52, and a cut groove bored on the side surface of the upper half 52 to give elasticity to the claw 108; 112 and 113 are the upper half 52, This is a guide protrusion provided on the side abutting portion of the lower half 51.

When adapter B with small cassette A inserted therein is attached to a standard type recording and reproducing machine, the supply reel disk of the two reel disks of the recording and reproducing machine is inserted into the supply reel 8 of small cassette A. However, since the take-up reel disk cannot be inserted into the take-up reel 9, the take-up reel disk is inserted into the lower half 51 of the adapter B at a position corresponding to the position of the take-up reel disk. A gear 60 that is driven by the engine is attached.

Further, a gear 61 is attached to the lower half 51 so as to mesh with the gear 60, so that the gear 61 meshes with the teeth 23 of the lower flange 22 of the take-up reel 9 of the small cassette A when the small cassette A is stored in the adapter B. .

The gear 61 is a shaft mounted on the tip of a plate 114 that is rotatably held between the annular holder 56 and the bottom surface of the lower half 51, with the center hole 56a of the annular holder 56 as the center. Further, the shaft 115 passes through a hole in a protrusion 116a of an annular holder 116 into which a take-up side reel disk insertion part 60a integrated with the gear 60 is fitted, and a slide lever 117. is fixed to the tip of the The sliding lever 117 is a lever 1 that is mounted on the lower half 51 and rotates around a support shaft 118.
19 to be slidable over a predetermined range, and the gear 6
1 is held parallel to the bottom surface of the lower half 51.

Further, the gear 61 is located at a position offset from a line passing through the center of the gear 60 and the center of the take-up reel 9, so that even if the position of the gear 60 is displaced, it can rotate to follow the displacement. .

Because of this configuration, even if the position of the reel disk on the take-up side is changed between the recording/reproducing devices used, the position of the gear 60 will change according to the device. Since the distance between the reel 9 and the take-up reel disk is not changed, the meshing state between the gear 61, the teeth 23 of the lower flange 22, and the gear 60 will not come out of alignment. Furthermore, when the gear 61 is at the biased position as described above, the flange 2
By meshing with the teeth 23 of gear 6,
Even if the distance between 0 and the take-up reel 9 changes, the gear 6
1 always meshes normally with the tooth portion 23 by changing its position in the vertical and horizontal directions.

Furthermore, since the gear 61 is located in a biased position, that is, in the space above the take-up reel 9 and the gear 60 as shown in FIG. 6, it is possible to maximize the diameter of the take-up reel 9. Therefore, more magnetic tapes can be stored and the recording time becomes longer.

Further, since the gear 61 is not pressed in the direction of the gear 60 and the teeth 23 by the spring, the magnetic tape can be wound with a relatively weak torque. (As a result, despite the addition of a take-up reel transmission mechanism and the complication of the magnetic tape running path, this application shows that it is possible to record and reproduce data on a small cassette using an adapter using a conventional device that uses a standard cassette. ) As small cassette A was inserted into adapter B, the lower reel flange 22 inside small cassette A
In order to easily and securely connect the teeth 23 and the gear 61, the ninth
As clearly shown in the figure, the teeth of the gear 61 are conical near the upper end, and the upper end surface of the gear 61 is tapered on both sides.
a, 61b.

For this purpose, the lower reel flange 22,
The gear 61 can be reliably engaged with the teeth 23 of the lower reel flange 22 no matter where the gear 61 is located.

Since the collision between the brake 25 and the peripheral edge of the lower flange is released by the pin 58, the driving force of the recording/reproducing machine is transferred to the supply reel 8 of the small cassette A.
is transmitted to the take-up reel 9, and the magnetic tape begins to run.

That is, even if you try to install small cassette A into a standard type recording/reproducing machine, the relative positions of the supply side reel and take-up side reel of small cassette A will be the same as the supply side reel disk and the take-up side reel disk of the recording/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 installed at the position of the take-up reel disk, and this gear and the winding of the small cassette are connected to each other. The driving force of a standard type recording/reproducing machine can be transmitted to the small cassette A by providing a driving force transmitting means between the reel and the reel.

Additionally, in general, in VTRs, etc., the rotational unevenness of the supply reel has a worse effect on recording and reproducing performance than the rotational unevenness of the take-up reel, so in this embodiment, the drive system of the supply reel is different from the conventional one. It has the same configuration as the standard device, but the take-up reel drive system has been changed to have less impact.

120 is the support shaft 1 installed on the bottom of adapter B.
20c is an accidental erasure prevention lever that is constantly biased with clockwise rotational force by a coil spring 120d, and one end 120a is connected to the lower half 5.
1 and is locked in the state shown in FIG. 120b is a detection projection provided on the accidental erasure prevention lever 120, which protrudes into the small cassette storage section, and when the small cassette A is inserted, detects the presence or absence of the accidental erasure prevention claw 2d, and when the claw 2d is present, detects the detection projection. , the erroneous erasure prevention lever 120 is moved to the sixth position from the claw 2d.
It rotates counterclockwise from the state shown in the figure, so that the end portion 120a forms approximately the same surface as the back surface of the lower half 51. When a non-recordable small cassette A is inserted into the adapter B, the accidental erasure prevention lever 120 is in the state shown in FIG.

Notch 1 drilled in the lower half 51 of adapter B
21, 122, 123, 124 and opening 125,
126, 127, 128, etc. are the same as the standard type cassette, and are notches for inserting the load ink pole, capstan, and lid opening lever, and openings for inserting the light source for tape end detection, brake release pin, and positioning pin. It is.

129 is a spring for pressing the gear 60 which is fixed to the upper half 52 at the base, 130 is a transparent plate welded to the upper half 52, and 131 is a notch into which the opening/closing lid is inserted when the small cassette A is opened. Department.

When using the above-mentioned small cassette A by attaching it to a recording/playback device exclusively for this small cassette, such as a portable type recording/playback device, attach a standard type cassette to the standard type recording/playback device. As in the case of use, the small cassette is inserted into the cassette housing 132 of the pop-up mechanism of the recording/reproducing apparatus as shown in FIGS. 11 and 12.

When the small cassette A is inserted in the normal state shown in FIG. 12, the protrusion 133 on the bottom of the cassette housing will be inserted into the bottom notch _2l1 of the small cassette A, and will come into contact with the bottom of the cassette when it is fully installed. contact and location is regulated. If the small cassette A is incorrectly inserted, the protrusion 133 will come into contact with the cassette, making it impossible to insert any more cassettes.

When the small cassette A is inserted into the cassette housing 132, the upper surface of the small cassette is rotated counterclockwise around the support shaft 137 in FIG. 11 by the spring 136.
The small cassette A is pressed by the pressing part 138a of No.8.
is pressed against the lower surface of the cassette housing 132.

When the pop-up mechanism is moved to the operating position,
The front lid of the small cassette A is opened, and the notches 36 formed in the front and bottom parts of the small cassette A are opened.
At 37 and 38, the loading pole 134, capstan 135, etc. of the recording and reproducing device are inserted inside the magnetic tape (as shown in Figure 2), and the supply reel disk of the recording and reproducing device is inserted into the supply reel of the small cassette. The drive force transmission mechanism to the take-up reel, which is similar to the gear in adapter B of the recording/reproducing device, enters the small cassette in conjunction with the movement of the pop-up mechanism from the non-operating position to the operating position. The teeth of the lower flange of the take-up reel mesh with each other, and the driving force of the recording/reproducing device is transmitted to the take-up reel as well. Further, the convex portions of the recording/reproducing device are aligned with the recesses 28, 29 formed in the lower half 2 of the small cassette, and the pins of the recording/reproducing device are inserted into the holes 32, 33 of the lower half, so that the recording/reproducing device is inside the recording/reproducing device. At this point, the position of the small cassette adapter is regulated, and the take-up reel of the small cassette A is released from being locked by the brake, and the magnetic tape is maintained in a running state.

Then, the magnetic tape is unwound from the small cassette by the loading pole, attached to the rotating magnetic head, and the driving force is transmitted to the take-up reel so that the magnetic tape runs along a predetermined running path, allowing recording and playback to take place. It is done.

When taking out the small cassette A from the dedicated recording/reproducing device, the cassette housing 132 is raised to the non-operating position by the stop operation and the eject operation, and then the small cassette A is pushed out to the right in FIG. 11 by a spring (not shown). Ru.

By moving this small cassette A to the right,
The second abutting portion 3b of the opening/closing lid (which protrudes from the upper surface of the cassette when the lid is opened) comes into contact with the pressing portion 138a of the rotating lever 138, and the rotating lever 138 applies a rotational force in the counterclockwise direction. Since rotation is restricted even when the lid is closed, the opening/closing lid 3 is closed against the elastic force of the spring 6, and the small cassette A can be taken out with the lid closed.

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, with the front cover of the small cassette A opened, a predetermined amount of the magnetic tape 10 is pulled out.
At this time, the brake 25 is in contact with the take-up reel 9, but the lower reel flange 22 and the brake 25 are in contact with the take-up reel 9.
The magnetic tape can be easily pulled out using the slip No. 5 without damaging it. By inserting the protrusion of the adapter accommodating part 53 into the side recess of the small cassette A, erroneous insertion can be prevented and the small cassette A can be stored in the adapter B's accommodating part in the normal position.

The pulled-out magnetic tape is attached to the guide poles 64 and 65 provided on adapter B, and the magnetic tape is placed on the front of adapter B in the same way as the magnetic tape path on the front of a standard type cassette. Close the lid so that the half is aligned with the bottom half.

As mentioned above, when the small cassette A is stored in the storage section 53 of the adapter B, the screw 19 on the bottom of the small cassette A is inserted into the center hole 56a of the annular holder 56.
Further, by inserting the pin 59 into the elongated hole 33, the small cassette A is positioned.

Due to the lid closing operation of the upper half 52 of the adapter B,
The opening/closing lid 103 rotatably provided on the upper half 52 has projections 107 in contact with the inclined cam surfaces 106a and 106b, and is opened once and then closed.

Therefore, it is possible to close the upper half 52 of the adapter B to the lower half 51 without causing inconveniences such as damage or bending of the magnetic tape 10 attached to the guide poles 64 and 65 due to the opening/closing lid of the adapter B. can. At this time, the claw portion 1 of the upper half 52
08 is engaged with the notch 109 of the lower half 51 and is locked in the closed state.

Since the opening/closing lid 3 of the small cassette A is made of transparent synthetic resin, the magnetic tape pulled out from the small cassette 3 is connected to the guide pole 6 of the adapter B.
4, 65, the position of the magnetic tape can be easily seen and erroneous operation can be prevented.

Since the small cassette A stored in the adapter B is constructed in the same way as a standard type cassette, it can be recorded and reproduced by being attached to a standard type recording/reproducing machine.

That is, when the small cassette is attached to the adapter, the gear 61 of the adapter meshes securely with the teeth of the lower flange 22 of the take-up reel 9 as shown in FIG.
lifts the brake 25 against the repulsive force of the spring, releases the lock state of the take-up reel 9,
The driving force of the take-up reel disk is transmitted to the take-up reel 9 via gears 60 and 61. Furthermore, by attaching the adapter B containing the small cassette A to a standard type recording/reproducing machine, even if the position of the gear 60 of the adapter B is displaced due to slight variations in the reel disk position of the standard type recording/reproducing machine. As described above, the rotation of the gear 61 always transmits the driving force from the reel disk normally to the take-up reel 9 of the small cassette A. Conversely, when the small cassette is taken out 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 brake 25 is restored by the repulsive force of the spring 27. , the take-up reel 9 is in a locked state.

Incidentally, in order to attach the magnetic tape in the small cassette to the guide pole of the adapter, it is of course possible to attach the magnetic tape in the locked state or in the unlocked state using an appropriate pull-out mechanism.

Further, the gear 61 is configured so that there is a slight degree of freedom in setting the position. For example, the gear 61 can be moved when a small cassette is attached to or removed from the adapter.
During installation, the gear 61 may be configured to mesh with the gear 60 and the teeth of the lower flange of the take-up reel. In this case, it is convenient to attach and take out the small cassette to and from the adapter. Become something.

As mentioned above, for example, by constructing an adapter for a small tape cassette, such an adapter allows the small tape cassette to be attached to a predetermined type of recording/reproducing machine.
Furthermore, a small tape cassette can be made smaller because, for example, the distance between the supply reel and the take-up reel can be reduced.

Then, the tape can be pulled out from the tape cassette made small in this way to serve as a tape path in a standard type recording/reproducing machine, and furthermore, the tape can be drawn out from the tape cassette made small enough to be used as a tape path in a standard type recording/reproducing machine. Even if the interval between the reel disks on the recording and reproducing machine is different from the interval between the reel disk on the supply side and the reel disk on the take-up side, there is no need for the reel disk on the winding side to be moved and set. The driving force can be transmitted well to the reel of the tape cassette, and the magnetic tape can be run smoothly.

In addition, for example, since the reel disk on the take-up side does not have to be configured to be movable, the mechanism of the reel disk part is extremely simple, the reel disk is less likely to break down, and the reel drive mechanism is highly durable. becomes.

As mentioned above, the small tape cassette of the present invention is smaller than a prescribed type of tape cassette, and is used by being housed in an adapter when attached to a prescribed type of recording/reproducing machine. A notch is provided on the circumferential side of the cassette housing to expose a part of the teeth of the flange of the take-side reel and allow the gear to engage with the teeth of the flange of the drive gear provided on the adapter when stored in the adapter. The diameter of the take-up reel can be adjusted by effectively utilizing the space by deviating from the line on the side where the line passing through the centers of the take-up reel and supply reel intersects. The recording time can be increased by increasing the recording time, and the drive force can be reliably obtained from the recording/playing device through the adapter, regardless of the change (error) between the tape cassette position and the distance between the reels of a standard type recording/playing device. In addition, the gear diameter on the adapter side can be made large, and the transmission ratio can be appropriately set.

[Brief explanation of the drawing]

Figures 1a, b, c, d to 5 are explanatory diagrams of a small tape cassette according to the present invention, and Figures 8 to 10 are explanatory diagrams of an embodiment of an adapter in which this tape cassette is housed. , FIG. 11, and FIG. 12 are explanatory views when a small tape cassette is installed in a dedicated recording/reproducing device. A... Entire small cassette, B, C... Cassette adapter, 1, 52... Upper half, 1l ₃ ... Arc-shaped notch, 2, 51... Lower half, 2a, 28,
29...Concavity, 2d...Erroneous erasure prevention claw, 2l ₁ , 2
l ₂ ...notch, 3...opening/closing lid, 3a...first abutment, 3b...second abutment, 4,104,118,
120c, 137, 142, 145, 152, 1
54, 157, 164... Support shaft, 5a, 5b, 1
11...kerf, 5c, 56b, 110, 116a
...Protruding portion, 8...Approximately U-shaped spring, 7...
Sliding piece, 8... Supply side reel, 9... Winding side reel, 10... Magnetic tape, 11a, 11b, 12
a, 12b, 64, 65...Guide pole, 13
... lower flange, 14, 15 ... uneven groove, 16 ...
...Plate spring, 17...Hole for inserting the supply side reel disk, 18...Shaft fixed to the lower half, 19...
...Screw, 22...Lower flange, 23...Teeth, 2
4, 36, 37, 38, 109...notch, 25
...Brake, 25a...Shoe part, 25b...
The other end of the brake, 26...A shaft integrally formed with the lower half, 27...Spring, 32, 33...
... Hole formed in the lower half, 53 ... Storage section, 5
4, 55...Position regulating protrusion, 56...Annular holding body, 56a...Tapered center hole, 58, 59...
...pin, 60,61,159,163...gear,
60a... Winding side reel disk insertion part, 61
a, 61b... Taper, 80... Supply side reel disk, 101, 102... Hinge, 103...
...Opening/closing lid of cassette adapter B, 105...Spring, 106, 119, 146, 158, 16
0... Lever, 106a, 106b... Inclined cam surface, 107... Protrusion, 108... Claw portion, 112,
113... Guide projection, 115... Shaft, 116...
Annular holder, 117...Sliding lever, 120...
... Erroneous erasure prevention lever, 120a... One end, 12
0b...detection projection, 120d...coil spring, 121, 122, 123, 124...notch, 125, 126, 127, 128...opening,
129...Press spring, 130...Transparent plate, 131...Notch opening, 132...Cassette housing, 133...Protrusion on bottom of cassette housing, 134...Loading pole, 1
35...capstan, 136...spring,
138... Rotating lever, 138a... Pressing part.

Claims (1)

[Scope of utility model registration request] A small tape cassette that is smaller than a specified type of tape cassette and is used by being stored in an adapter when attached to a specified type of recording/reproducing machine, and a part of the teeth of the flange of the take-up reel is exposed. A notch that allows the drive gear provided on the adapter to engage with the teeth of the flange when the adapter is stored in the adapter is attached to the take-up reel and the supply reel on the circumferential side of the cassette case. A small tape cassette is provided on the side surface crossed by a line passing through the center of each of the tape cassettes at a position offset from the above.