JPS626617Y2 - - 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, it relates to a small tape cassette that requires an adapter and when attached to the adapter, it is necessary to pull out the tape and form a tape path at a predetermined position on the adapter. By configuring the opening/closing lid so that it is flush with the top surface of the adapter when the tape cassette is attached to the adapter when the lid is open, there is no problem in attaching the adapter to a standard type recording/reproducing device. An object of the present invention is to provide a small tape cassette in which the tape cassette is not damaged.

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.

Also, when a small tape cassette is attached to the adapter and exposed on the surface of the adapter, the part of the tape cassette that is exposed while attached to the adapter should be flush with the plane of the adapter. This is necessary when installing it on the playback machine.

The present invention has been made in accordance with the above object, and one embodiment of a small 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 part 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 opening/closing lid 3 is positioned higher than the upper end surface of the upper half 1, as shown in FIG. The thickness of the opening/closing lid 3 is approximately equal to the thickness of the upper plate of the cassette adapters B, C, and the protruding dimension of the opening/closing lid 3 from the upper end surface of the upper half 1 in the open state is the same as that of the upper plate of the cassette adapters B, C.
The dimensions are approximately equal to the thickness of the upper plate.

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 tape running path 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 configured to be 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 in 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 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.

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 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 is prevented from loosening.

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 devices. 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 lower flange 22a of the take-up reel 9 and the upper surface of the peripheral edge 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.
After surrounding and inserting the spring 27, the upper half is attached to hold the spring 27, and the assembly is completed and can be easily assembled.

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 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.
When the small cassette is inserted into the small cassette ₁₁ and inserted incorrectly, the protrusions on the device side come into contact with the notches ₂₁₂ and ₁₁₃ of the cassette halves, making it impossible to completely install the small cassette.

Figures 6 to 13 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, 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 59 of the protrusion 54 enters the elongated hole 33 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 fixed to the support shaft 104 and having 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.,
The opening/closing lid 103 is caused to open/close only a small amount due to a malfunction.

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

This lock can be easily released by pressing the protrusion 110 on the side surface of the upper 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 the protrusion 116a of the annular holder 116 into which the take-up reel disk insertion part 60a integrated with the gear 60 is fitted, and the shaft 115 passes through a hole in the protrusion 116a of the annular holder 116 into which the take-up reel disk insertion part 60a integrated with the gear 60 is fitted. It is fixed to the tip of 117. 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 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 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 cassette, and are notches for inserting the loading 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. 14 and 15.

When the small cassette A is inserted in the normal state shown in FIG. 15, 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. 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 fed out 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. 14 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 opening/closing lid 3 of the small cassette A opened, a predetermined amount of the magnetic tape 10 is pulled out. The opening/closing lid 3 is opened horizontally in the same way as when it is attached to a dedicated recording/reproducing device. At this time, the brake 25 is in contact with the take-up reel 9, but the slip between the lower reel flange 22 and the brake 25 allows the magnetic tape to be pulled out easily and without damage. Small cassette A
By inserting the protrusion of the accommodating part 53 of the adapter into the side recess of the adapter, erroneous insertion can be prevented, and the small cassette A can be stored in the accommodating part of the adapter B 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 matches 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 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, 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.

In addition, by closing the adapter B as described above, the notch opening 131 of the upper half 52 is fitted with the opening/closing lid 3 which is opened in the horizontal position, and the opening/closing lid 3 is fitted in the horizontal position.
is neither recessed nor protruding from the upper surface of the upper half 52 of the adapter B;
It is located on the same plane as the top surface of adapter B, and constitutes a part of the top surface of adapter B.

Note that the shape and dimensions of the notch opening portion 131 are approximately equal to the external dimensions of the opening/closing lid 3;
When fitted with the opening/closing lid 3, a large gap is not formed around the opening/closing lid 3.

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 a 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 from the state shown in FIG. 9, and the pin 58 of the adapter engages the brake 25. Lift against the repulsive force of the spring,
The lock state of the take-up reel 9 is released, and the driving force of the take-up reel disk is transferred to the take-up reel 9 through the gear 6.
0,61. Conversely, when the small cassette is taken out of 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, so that the spring 27
The brake 25 is restored by the repulsive force, 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. In this case, it is convenient to attach and take out the small cassette to and from the adapter. Become something.

When installing the adapter B containing the small cassette A into a standard type recording/reproducing machine, the opening/closing lid 3 of the small cassette A fits into the notch opening 131 on the top surface of the adapter B. The upper surface of the closing and opening/closing lid 3 is the upper half 52 of the adapter B.
Since the upper surface of the adapter B has no recesses or protrusions, the adapter B can be smoothly and reliably attached to a standard type recording/reproducing device. Note that if the opening/closing lid 3 is able to penetrate the notch opening 131 and protrudes from the top surface of the adapter B, the opening/closing lid 3 will collide with the device side and the adapter B
Installation is limited midway through. On the other hand, when the opening/closing lid 3 is partially fitted into the notch opening 131, a recess is formed in this part, and especially the adapter B
When the adapter is inserted into a recording/playback device that incorporates an automatic attachment mechanism that automatically attaches adapter B by simply inserting it partially through the opening on the front side of the device, the presence of the above-mentioned recess makes it difficult to attach the adapter. The retracting operation using the roller and the adapter insertion detection operation using the microswitch using the top surface of the adapter become uncertain, and it may become impossible to attach the adapter B to the recording/reproducing device.

Furthermore, if the opening/closing lid 3 is recessed into the cutout opening 131 or protrudes beyond this, a step will be created in this part, and the operator's fingers may get caught in this step while handling the adapter. Inconveniences may occur.

Note that when the upper half 52 of the adapter B is not provided with the notch opening 131 and is in a closed state, the upper surface of the adapter B becomes a flat surface.
The opening/closing lid 3 of the small cassette A must be located on the lower surface side of the upper half 52. On the other hand, the opening/closing lid 3 constitutes a ceiling portion such as a notch 121 into which a loading pole or the like is relatively fitted when the adapter B is attached to a standard type recording/reproducing device. For this reason, the opening/closing lid 3 serving as the ceiling is at a low height position, and if this situation continues, the loading pole will collide with the opening/closing lid when the adapter is installed, so the opening/closing lid 3
Although not preferred, it is necessary to provide an escape opening to avoid the above-mentioned collision. In the case of this embodiment, the loading pole will not collide with the opening/closing lid 3 even if no special escape opening is formed in the opening/closing lid.

Figures 11, 12, and 13 show an improved version of adapter B in terms of operability by automatically pulling out the magnetic tape from small cassette A and storing the magnetic tape into small cassette A. FIG. 2 is a plan view showing the tape drawer mechanism with the upper plate of the upper half of the cassette adapter C removed, and a plan view and a side view showing the opening/closing operation of the opening/closing lid on the front surface of the cassette adapter by opening and closing the operation lid. Descriptions of parts that are approximately the same as those of the adapter B described above will be omitted.

If you insert the magnetic tape 10 into adapter C without pulling it out from small cassette A, small cassette A will be inserted.
in the notches 36, 38 of the magnetic tape 10.
Guide rollers 140, 141 are inserted inside.

Close the upper half of adapter C, and attach the support shaft 1 to the back.
An operating lid 143 that can be opened and closed by 42
When the lever is opened, the sliding lever 144, which is slidably provided by a known method, moves to the left in FIG. One end is pressed and rotated clockwise to move the connector 146' connected to the other end upward in FIG. 12. Since the protrusion 147 provided on the support shaft 104 of the opening/closing lid 103 is connected to the tip of the connector 146', the opening/closing lid 103 is opened by the above operation.

Furthermore, when the operating lever 149 is rotated clockwise from the position shown by the two-dot chain line in FIG. 11 to the position shown by the solid line, the connector 150 moves downward in FIG. Lever 151
is rotated clockwise around the support shaft 152. This rotation of the rotary lever 151 causes the first loading lever 153 to move about the support shaft 154 from the position indicated by the two-dot chain line to the position indicated by the solid line, thereby pulling out the magnetic tape from the small cassette.

Further, the rotation of the operating lever 149 causes the L-shaped lever 156 to rotate clockwise about the support shaft 157 via the connector 155, and moves the lever 158 to the right in FIG.

By moving the lever 158 to the right, the gear 159
The gear 159 is rotated clockwise via a lever 160 provided integrally with the second loading lever 162 via a timing belt 161.
A gear 163 provided integrally with the holder is rotated clockwise. For this reason, the second loading lever 16
2 moves from the position indicated by the two-dot chain line to the position indicated by the solid line in FIG. 11, and the magnetic tape 10 is pulled out from the small cassette A. The positions of the guide rollers 140, 141 at this time are naturally the same as the guide positions of the standard type cassette.

Furthermore, as the second loading lever 162 moves, the guide pole 141 comes into contact with the opening/closing lid 103 in FIG. As a result, the opening/closing lid 103 is opened and closed, so the above operation is not hindered.

Furthermore, as is clear from FIG. 11, opening the operation lid 143 enables the operation of the operation lever 149. lever 153,
162 is never moved.

By operating the operating lever 149 clockwise to the position indicated by the solid line and then closing the operating lid 143, the closing spring (not shown) of the opening/closing lid 103 causes the protrusion 147 and the connector 14 to close.
6', the L-shaped lever 146 is moved in the opposite direction to that described above, the opening/closing lid 103 is closed, and the operating lever 149 becomes inoperable, and furthermore, the operating lever 149 cannot be moved counterclockwise. It will be locked. Naturally, the operation lid 14
3 is kept in the closed state by a known click or the like so that it is not opened by the counterclockwise force of the operating lever 149.

Further, as the connector 150 moves downward in FIG.
5 clockwise to the position indicated by the solid line.

The tip of the rotating lever 165 protrudes into the storage section 53 of the small cassette A, and an arcuate notch _1l3 is bored in the upper surface of the small cassette A stored therein.
enter. For this reason, the guide roller 140,1
41, when the magnetic tape 1 is being pulled out from the small cassette A, the small cassette A cannot be taken out from the adapter C.

On the other hand, by the above operation, the guide roller 140,
141 is the adapter C in the position shown by the solid line in Figure 11.
When attempting to insert the small cassette A, the rotating lever 165 prevents the insertion of the small cassette A, thereby preventing accidents such as not being able to record or play back due to incorrect insertion or damage to the magnetic tape. It's something you get.

Adapter C containing the small cassette in the above condition
is attached to a standard recording and reproducing device, and recording and reproducing are performed in the same manner as in the case of adapter B.

Next, the operation of taking out the small cassette A from the cassette adapter C will be explained. As in the case of storing the small cassette A, when the operating lid 143 is opened, the opening/closing lid 103 on the front surface of the adapter C is opened, and the operating lever 149 can be operated. Operation lever 149
11 in a counterclockwise direction from the position indicated by the solid line in FIG. 11 to the position indicated by the two-dot chain line, the first and second loading levers 153, 162, etc. The opposite operation is performed.

By moving the operating lever 149 in the counterclockwise direction,
A gear 166 coaxially provided with the operating lever 149
The rotation of the gear 166 is transmitted to the gear 60 via the gear mechanism, and by rotating the take-up reel, the magnetic tape drawn out from the small cassette A is wound into the small cassette A.

In the gear mechanism, when the operating lever 149 is rotated clockwise by a known one-way clutch or the like, or when the adapter C is attached to the device, the rotational transmission force of the gear 166 and the gear 60 is transmitted. Contains a mechanism for cutting.

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, and the reel disk is less likely to break down, and the reel drive mechanism is highly durable. Become something.

As mentioned above, the small tape cassette according to the present invention can be attached directly to a dedicated recording/reproducing machine, and can be attached to a predetermined type of recording/reproducing machine by storing it in an adapter and attaching it in two directions: an open lid and a closed lid. A small tape cassette having an opening/closing lid for protecting the tape, the opening/closing lid for protecting the tape is arranged such that the top surface of the opening/closing lid in the open state protrudes from the top surface of the cassette to the same extent as the thickness of the top plate of the adapter. When taking out a tape cassette that is supported so that it can be opened and closed and is installed in a dedicated recording/reproducing machine, a part of the protruding opening/closing lid is abutted against the closing lid member to resist the biasing force. On the other hand, when the lid is opened and stored in the cassette adapter, the top surface of the opening/closing lid is approximately flush with the top surface of the adapter. It is possible to stably and reliably attach the tape cassette to the recording/playback machine, and when the tape cassette is removed from the dedicated recording/playback machine, the protruding part of the tape protection cover can be used to automatically open/close the cover. It has features such as being able to close the lid.

[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 6 to 13 are illustrations of an embodiment of an adapter in which this small tape cassette is housed. Figures 14 and 15
The figure is a diagram 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 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
...Protrusion, 6... 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 the bottom of the cassette housing, 134...Loading pole,
135... Capstan, 136... Spring, 138, 151, 165... Rotating lever, 1
38a... Pressing part, 140, 141... Guide roller, 143... Operation lid, 144... Sliding lever, 146, 156... L-shaped lever, 14
6', 150, 155... Connector, 147...
...Protrusion, 149...Operation lever, 153...First
Loading lever, 161...Timing belt, 162...Second loading lever.

Claims (1)

[Scope of utility model registration request] A small tape that has an opening/closing lid to protect the tape, which is biased in two directions: an opening lid and a closing lid, which is attached directly to a dedicated recording/playback device and installed in a specified type of recording/playback device by being housed in an adapter. A cassette, the opening/closing lid for protecting the tape is supported in an openable/closable manner so that the top surface in the open state protrudes from the top surface of the cassette to the same extent as the thickness of the top plate of the adapter, and has a dedicated recording/playback function. When removing a tape cassette installed in the machine, a part of the protruding opening/closing lid is brought into contact with the closing lid member to close the opening/closing lid against the biasing force, while the opening/closing lid is closed inside the cassette adapter. A small tape cassette configured such that the top surface of the opening/closing lid is substantially flush with the top surface of the adapter when stored with the lid closed.