JPS6112625Y2 - - 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, regarding a tape cassette that requires an adapter and which requires the tape to be pulled out and a tape path formed at a predetermined position on the adapter when attached to the adapter, it is possible to use the standard type adapter with the tape cassette stored in the predetermined position without any problems. so that it can be inserted into the recorder/player of
To provide a tape cassette provided with a cut groove into which a protrusion for preventing incorrect insertion provided on the recording/reproducing device of the predetermined type is inserted at a location opposite to the cut groove for preventing incorrect insertion provided on the adapter. With the goal.

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 applied 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 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 part of the front side of the upper half 1 by means of 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, and furthermore, by providing a protrusion 5c 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, so that the uneven grooves 14 and 15 are mutually biased. As a result, the supply reel 8 is fixed and the magnetic tape wound around the supply reel 8 is prevented 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 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, as shown in FIGS. 1d and 10.

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 cross-sectional view of FIG. 3, the recess 2a of the lower half 2 is omitted for the sake of simplicity, 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.

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 are similarly tapered 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 10 passes through a predetermined running route from the supply reel 8 and is wound onto the take-up reel 9.

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 supply reel and take-up reel are braked when not in use, preventing the magnetic tape from loosening inside the small cassette during transportation, etc., and making it easy to use in recording and reproducing equipment. When this happens, both brakes are released.
Furthermore, as will be described later, when used 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 9 and the shoe of the brake 25 are connected. Since the portion 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.
Step portions 2l ₁ and 2l ₂ are provided where c 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 stepped portion _2l1 , and the upper surface of the small cassette has no stepped portion formed on the front surface and an arcuate stepped portion _1l3 formed on the rear surface. 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.
When the small cassette is inserted into the small cassette _L1 and the small cassette is inserted incorrectly, the protrusions on the dedicated device side come into contact with the stepped portions _2L2 and _1L3 of the cassette halves, making it impossible to completely install the small cassette.

As is clear from FIGS. 1d and 2, an opening 38 defined by step portions 2l ₁ and 2l ₁ is provided on the front side of the lower half 2. Tape cassette A
When the tape 10 is attached to the dedicated device, the capstan 135 enters the opening 38 and the tape 10
A run will be held. As is clear from FIG. 1d, a cut groove 42 is provided in the bottom 41 of the lower half 2, and this cut groove 42 is formed from the opening 38 side to a predetermined depth. The kerf 42 serves as an escape groove when the tape cassette A is inserted into a standard type device via the adapter B, as will be described later.

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, while the lower half 2 of the small cassette A has the protrusions 54 and 55 formed thereon.
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, 59 are embedded in the protrusions 54, 55, and these pins 58, 59 are inserted into holes 32, 33 formed in the lower half 2 of the small cassette A. Horizontal positioning of small cassette A in adapter B is done using screw 19 of small cassette A.
enters the tapered center hole 56a of the annular holder 56, and the pin 58 of the protrusion 54 enters the elongated hole 32 of the small cassette A. pin 5
Reference numeral 8 serves to release the brake of the take-up reel 9 of the small cassette A. That is, pin 58 and hole 32
As clearly shown in FIG. 5, the position is such that when the pin 58 is inserted into the hole 32, the pin 58 lifts the brake 25, which is the brake mechanism of the take-up reel 9 of the small cassette A. be.

101 and 102 are the upper half 52 of adapter B
103 is a hinge for attaching the lower half 51 to the upper half 52 so as to open and close the cassette adapter B, which is attached to the upper half 52 by a spring 105 around a support shaft 104 and constantly biased in the direction of closing the lid. It is an opening/closing lid. Reference numeral 106 denotes a lever that is fixed to the support shaft 104 and has inclined cam surfaces 106a and 106b.
By contacting the protrusion 107 fixed to the lower half 51 with the inclined cam surfaces 106b, 106a, etc.,
This operation causes the opening/closing lid 103 to be opened/closed by a small amount.

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 upper half 52 inward. Reference numeral 111 denotes a cut groove bored in the side surface of the upper half 52 in order to give elasticity to the protruding part 110 and the claw part 108 integrally formed with the upper half 52, and 112 and 113 respectively to the upper half 52, This is a guide protrusion provided on the side abutting portion of the lower half 51.

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

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.

Because of this configuration, even if the position of the reel disk on the take-up side is changed between the recording and 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 off.

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 mesh the teeth 23 of the gear 61 with the gear 61, as shown in FIG. It is made up of.

For this purpose, the lower reel flange 23,
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 lower flange periphery is released by the pin 58, 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 is starts running.

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 rotated counterclockwise from the state shown in FIG. When a small cassette A that cannot be recorded 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 the insertion notches for each loading pole, capstan, and lid opening lever, and the insertion openings for the light source for tape end detection, brake release pin, and positioning pin. It is a hole.

As mentioned above, tape cassette A is inserted into adapter B.
When the tape cassette A is inserted into the adapter B, the tape cassette A is stored in a predetermined position by the position regulating projections 54, 55, etc.
1. The tape cassette A is aligned with the opening 125 formed in the bottom plate of the lower half 51 of the adapter B. At the same time, the cutout 42 of the tape cassette A is aligned with the cutout 125 for preventing erroneous insertion that is provided from the opening 125 to the back. The thickness of the adapter B is determined by the standard type device, and the tape width is also determined, so that the thickness of the bottom plate of the adapter B is inevitably thin. On the other hand, the protrusion height of the protrusion for preventing erroneous insertion provided in the standard type device is determined and is designed to perform its function, so that when the adapter B is inserted into the cassette housing of the standard type device, if the cutout 42 is not provided, it will hit the bottom surface of the tape cassette A and will not be able to be inserted completely. However, in this embodiment, the cutout 42 into which the protrusion for preventing erroneous insertion provided on the standard type device is fitted is provided at a position facing the cutout 125a for preventing erroneous insertion provided in the adapter B, so that the protrusion fits into the opening 3.
Since the adapter B does not come into contact with the edge of the adapter 8 and does not prevent the projection from being inserted, the adapter B can be attached to a standard type device without any trouble.
When the thickness of the bottom plate of the adapter B is adjusted to the thickness of the base plate of the adapter B, the height of the projection for preventing erroneous insertion is sufficiently covered, so that the tip of the projection does not enter the tape cassette A, and does not get in the way, making it possible to effectively utilize the internal space.

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 step _2l1 on the bottom of the small cassette A, and will come into contact with the bottom of the cassette when fully inserted. 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. 14 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. Furthermore, the convex portions of the recording/reproducing device match the recesses 28 and 29 formed in the lower half 2 of the small cassette, and the holes 3 in the lower half 2
2 and 33, the position of the small cassette adapter is regulated in the recording and reproducing apparatus, and the locking state of the brake on the take-up reel of small cassette A is released, and the magnetic tape starts running. maintained in a viable 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 top 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.
With the slip No. 5, the magnetic tape can be pulled out easily and without damage. 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 10 is attached to guide poles 64 and 65 provided on adapter B, and the magnetic tape is placed on the front side of adapter B in the same way as the magnetic tape path on the front side of a standard type cassette.
Then, close the lid so that the upper half of adapter B is aligned with the lower 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 locked in the notch 109 of the lower half 51,
In the closed state, it will be locked.

Since the opening/closing lid 3 of the small cassette A is made of transparent synthetic resin, it is easy to see the position of the magnetic tape 10 pulled out from the small cassette 3 when attaching it to the guide poles 64 and 65 of the adapter B. This makes it possible to prevent erroneous operations.

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 A is attached to the adapter B, the gear 61 of the adapter B is connected to the take-up reel 9.
9, the pin 58 of the adapter lifts the brake 25 against the repulsive force of the spring, and the take-up reel 9 is brought into the locked state. 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 engagement between the take-up reel 9 and the gear 61 is disengaged, and the pin 58 is removed from the small cassette.
The brake 25 is restored by the repulsive force of the spring 27, and the take-up reel 9 becomes locked.

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 to have a slight degree of freedom in position setting, and for example, when a small cassette is attached to or removed from the adapter, the gear 61 is moved.
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, and in this case, it is convenient to install and take out the small cassette 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.
However, 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 tape cassette according to the present invention is
A small tape cassette that is smaller than a prescribed type of tape cassette and is housed in an adapter and attached together with the adapter when used in a prescribed type of recording/reproducing machine, and has a part on its bottom that is housed in the adapter. In this state, a cut groove is provided at a location that coincides with the erroneous insertion prevention groove provided on the bottom of the adapter, and when the adapter is attached to the recording/reproducing device of the predetermined type, the erroneous insertion prevention groove and the kerf are provided. Since the tape cassette is configured to fit with a protrusion for preventing incorrect insertion provided on the recording/reproducing device, the tape cassette can be attached to the adapter, and the adapter can be inserted into the cassette housing of a predetermined type of recording/reproducing device. At this time, the adapter is guided by the protrusion protruding from the bottom surface of the cassette housing and is placed in the appropriate position without any problem.Also, it is generally sufficient to drill the groove to the depth of the case, so it is not necessary to insert the adapter into the case. This has the advantage that the protrusion does not get in there and the space inside the case can be used effectively.

[Brief explanation of the drawing]

Figures 1a, b, c, d to 5 are explanatory views of the tape cassette according to the present invention, and Figures 6 to 10 are
The figure is an explanatory diagram of an embodiment of an adapter in which this tape cassette is accommodated, and FIGS. 11 and 12 are diagrams illustrating the state in which a small cassette is attached to a dedicated recording/reproducing machine. A... Entire small cassette, B, C... Cassette adapter, 1, 52... Upper half, 1l ₃ ... Arc-shaped step, 2, 51... Lower half, 2a, 28, 2
9...Concavity, 2d...Incorrect erasure prevention claw, 2l ₁ , 2l ₂
...Stepped portion, 3... Opening/closing lid, 3a... First abutment part,
3b...Second abutting section, 4,104,118,12
0c, 137, 142, 145, 152, 15
4,157,164...Spindle, 5a, 5b, 11
1... Cut groove, 5c, 56b, 110, 116a...
...Protruding portion, 6... Substantially 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, 109... Notch, 25... Brake, 25a... Shoe part, 25b... Other end of brake, 26... Shaft integrally formed with lower half, 29... Spring, 41...bottom, 42
... Cut groove, 32, 33 ... Hole formed in the lower half, 38 ... Opening, 53 ... Storage section, 54, 5
5... Position regulating protrusion, 56... Annular holding body, 5
6a... Tapered center hole, 58, 59... Pin, 60, 61, 159, 163... Gear, 60
a... Winding side reel disk insertion part, 61a, 6
1b... Taper, 80... Supply side reel disk, 101, 102... Hinge, 103... Opening/closing lid of cassette adapter B, 105... Spring, 106, 119, 146, 158, 160...
... Lever, 106a, 106b ... Inclined cam surface,
107...Protrusion, 108...Claw portion, 112, 11
3... Guide projection, 115... Shaft, 116... Annular holder, 117... Sliding lever, 120... Accidental erasure prevention lever, 120a... One end, 120b
...Detection protrusion, 120d...Coil spring, 121, 122, 123, 124...Notch,
125, 126, 127, 128... open hole, 12
5a... Cut groove for preventing incorrect insertion, 129... Pressing spring, 130... Transparent plate, 131...
Notch opening, 132...cassette housing, 1
33...Protrusion on the bottom of the cassette housing, 134
... Loading pole, 135 ... 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 prescribed type of tape cassette and is housed in an adapter and attached together with the adapter when used in a prescribed type of recording/reproducing machine, and has a part on its bottom that is housed in the adapter. In this state, a cut groove is provided at a location that coincides with the erroneous insertion prevention groove provided on the bottom of the adapter, and when the adapter is attached to the recording/reproducing device of the predetermined type, the erroneous insertion prevention groove and the cut groove are provided. A tape cassette having a structure in which a groove fits into a protrusion for preventing incorrect insertion provided in the recording/reproducing device.