JPH06243634A - Adaptor for small size tape cassette - Google Patents

Abstract

PURPOSE:To prevent it from becoming the resistance of the load/unload of the small size tape cassette into an adaptor for small size tape cassette by retreating a moving member being freely forwards and backwards for the small size tape cassette from the housing part of the small size tape cassette provided in an adaptor casing. CONSTITUTION:A tape drawing means 20 drawing out a magnetic tape T from the small size tape cassette 1 housed in a housing part 11f is provided in the adaptor casing 11. Further, the moving members 30B (31B, 33) being freely forwards and backwards for the small size tape cassette are provided in the adaptor casing 11. Then, the projection parts 31a1, 33a1 for detection formed respectively on an erroneous erasure prevention detection lever 31B and a tape kind detection lever 33 are retreated from the housing part 11f in the unloading position of the tape drawing means 20B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small tape cassette adapter used when a small tape cassette smaller than a standard tape cassette is mounted in a recording / reproducing apparatus for a standard tape cassette.

[0002]

2. Description of the Related Art When mounting a small tape cassette, which is smaller than a standard tape cassette, in a recording / reproducing apparatus for a standard tape cassette, a small tape cassette adapter is often used.

A conventional example of this type of small tape cassette adapter will be described with reference to FIGS. FIG. 3 is a perspective view showing an external shape of a conventional small tape cassette adapter and a small tape cassette, and FIG. 4 is a perspective view showing a tape pull-out means and a retractable member to the small tape cassette in the conventional small tape cassette adapter. 5 and 5 are plan views showing a conventional small-sized tape cassette adapter, (A) showing a state in which the tape pull-out means has reached the unloading position, and (B) showing the tape pull-out means in the loading completion position. The state has been reached.

Before describing a conventional small tape cassette adapter 10A (hereinafter also referred to as an adapter 10A) with reference to FIG. 3, a small tape cassette 1 which is inserted into and removed from the adapter 10A will be described.

The small tape cassette 1 is smaller than a standard tape cassette (not shown), and is provided between a supply reel 3 and a take-up reel 4 housed inside a small cassette housing 2 having a rectangular parallelepiped shape. The magnetic tape T is wound around the magnetic tape T, and the magnetic tape T wound around the supply reel 3 is stretched along the back surface of the small cassette front lid 5 provided on the front side surface 2a of the small cassette housing 2 so as to be freely opened and closed. While being wound up, it is wound up on the winding reel 4. In addition, the rear side surface 2b of the small cassette housing 2
Therefore, an erroneous erasure prevention claw 2b ₁ is provided on the supply side,
The erroneous erasure prevention claw 2b ₁ is formed so that it can be cut out without protruding to the outside of the rear side surface 2b. When the user cuts the erasure prevention claw 2b ₁ as necessary, a recess is formed inside the rear side surface 2b. It has a function of prohibiting erasing (recording) on the formed and recorded magnetic tape T. As the standard tape cassette, for example, a VHS type standard tape cassette is well known, while as the small tape cassette 1, for example, a VHS-C type small tape cassette is well known. However, the present invention is not limited to these. On the other hand, a tape type detection hole 2b ₂ for detecting the type of the magnetic tape T is formed on the winding side of the rear side surface 2b of the small cassette housing 2 corresponding to the type of the magnetic tape T. For example, if a standard magnetic tape using iron oxide magnetic material is stored, the tape type detection hole 2
When b ₂ is not punched and a high performance magnetic tape using a metal tape or barium ferrite is stored, a tape type detection hole ₂ b ₂ is punched.

Next, a conventional small-sized tape cassette adapter (adapter) 10A is formed to have substantially the same size as the standard tape cassette of the standard tape cassette.
The external dimensions of the standard tape cassette are standardized so as to maintain compatibility with a standard tape cassette recording / reproducing apparatus (not shown) to which the standard tape cassette is applied, and the external dimensions of the adapter 10A are also standard. Like the tape cassette, it is naturally formed to satisfy the standard. In this adapter 10A, the magnetic tape T is pulled out from the accommodated small-sized tape cassette 1 by the tape pull-out means 20A, and a front tape path Ta of the magnetic tape T (FIG. 5 (B)) which is substantially equivalent to the standard type tape cassette is formed. Is configured.

That is, the adapter housing 11, which is the base of the adapter 10A, is made of a resin material and has a front side surface 11a and a rear side surface 11a.
It is formed in a rectangular parallelepiped shape by being surrounded by b, the left side surface 11c, and the right side surface 11d. Front side 11 of this adapter housing 11
a is a front tape path Ta of the magnetic tape T (see FIG. 5).
An adapter front lid 12 for protecting (B)} is provided openably and closably, while an adapter upper lid 13 for inserting and removing the small tape cassette is provided openably and closably on the upper surface 11e.

A storage portion 11f for storing the small tape cassette 1 is formed in a concave shape inside the adapter housing 11 below the adapter upper lid 13. When inserting the small tape cassette 1 into the storage portion 11f from above, the small cassette front lid 5 side provided on the front side surface 2a of the small cassette housing 2 is provided with the adapter front lid 12 provided on the front side surface 11a of the adapter housing 11. On the other hand, the erroneous erasure prevention claw 2b ₁ and the tape type detection hole 2b ₂ provided on the rear side surface 2a of the small cassette housing 2 are inserted toward the rear side surface 11 side of the adapter housing 11. .

A bottom plate 14 made of a thin plate such as an iron plate is attached to the bottom surface 11h of the adapter housing 11, and the loading pocket 1 is provided on the front side of the bottom plate 14.
4a is opened, and a reel hole 14b is formed in the middle part.

In addition, in the housing portion 11f of the adapter housing 11, the small tape cassette 1 housed therein and the magnetic tape T are stored.
Winding side tape pulling arm 22, in which a pair of guide rollers 23, 28 forming a tape pulling-out means 20A for pulling out the tape to form a front tape path substantially the same as the standard type tape cassette are planted, and a supply side tape pulling arm 27 is waiting in the unloading position.

Here, the tape pull-out means 20A is shown in FIG.
The constituent members 21 to 28 of FIG. In the tape pull-out means 20A shown in FIG. 4, the drive gear 21 is connected to a motor (not shown) on the right side (winding side) of the adapter housing 11 and a shaft 11g provided inside the adapter housing 11 is provided.
It is provided so as to be rotatable around ₁ . Below the drive gear 21, a winding-side tape pull-out arm 22 that rotates in conjunction with the drive gear 21 is supported by a shaft 11g ₂ provided inside the adapter housing 11. A guide roller 23 for pulling out the magnetic tape is planted at one end portion (tip portion) 22a of the winding-side tape pulling arm 22, and a pin portion 21a formed so as to project from the back surface of the drive gear 21 at the intermediate portion 22b. A cam groove 22b _{1 to} be fitted is formed,
Further, the pin portion 22c is attached to the other end portion 22c through the shaft 11g _2.
1 is formed so as to project downward.

Further, inside the adapter housing 11, the rear side surface 1
On the side of 1b, a long plate-shaped first slide plate 24A is interlocked with the rotation of the take-up side tape pulling arm 22, and the arrow X ₁ ,
It is provided so as to be linearly slidable in the X ₂ direction. The first slide plate 24A is fitted in the lateral guide hole 11g ₃ bored in the interior of the adapter housing 11 to the pin portion 24a ₁ which is protruded to the right end portion 24a, than the pin portion 24a ₁ at the right end portion 24a near The lateral guide hole 24b ₁ formed near the middle portion 24b is formed by fitting the pin portion 22c ₁ of the winding-side tape pulling arm 22 into the vertical guide groove 24a ₂ formed on the left side.
Shaft 11g ₄ is fitted provided inside the adapter housing 11, the pin portion 2 protruding formation formed in the vicinity of the left end portion 24c
4c ₁ is fitted with a forked portion 25a of a connecting arm 25 described below, and a lateral portion 11g ₅ bored inside the adapter housing 11 is fitted into a pin portion 24c ₂ formed to project at the left end portion 24c.

Further, the connecting arm 25 is provided for connecting the second slide plate 26 to below the first slide plate 24A, about an axis 11g ₆ provided inside the adapter housing 11 is supported so that it can rotate, bifurcated bifurcated portion 25a is formed at one end, an elliptic hole 25b is bored through the other end via a shaft 11g _6.

The left side surface 1 inside the adapter housing 11
On the 1c side, a long plate-shaped second slide plate 26 is provided so as to be linearly slidable in the directions of the arrows Y ₁ and Y _{2 at} substantially right angles to the first slide plate 24A. The second slide plate 26 has a pin portion 26a protruding from the rear side surface 11b.
The elliptical hole 25b formed in the connecting arm 25 is fitted into the vertical guide groove 26b, 26 formed in front of the pin portion 26a.
The shafts 11g ₇ and 11 provided inside the adapter housing 11 in c
g ₈ is fitted, elliptical holes 27b ₁ of the supply side tape pull-out arm 27 below the pin portion 26d which is protruded in a vertical guide groove 26c near the front is fitted.

The supply-side tape pull-out arm 27 is supported by the common shaft 11g ₈ so as to rotate in conjunction with the take-up-side tape pull-out arm 22. One end portion (tip portion) 27a of the supply-side tape pull-out arm 27
A guide roller 28 for drawing out the magnetic tape is planted in the end of the elliptical hole 27 near the shaft 11g ₈ of the other end 27b.
b ₁ is penetrated and drilled.

As described above, the tape pull-out means 20
In A, the driving force of the drive gear 21 is sequentially transmitted to the winding-side tape pull-out arm 22, the first slide plate 24A, the connecting arm 25, the second slide plate 26, and the supply-side tape pull-out arm 27.

Next, in the conventional small tape cassette adapter (adapter) 10A, the advancing / retreating member 30A that can advance / retreat with respect to the small tape cassette 1 housed in the housing portion 11f of the adapter housing 11 will be described. The advancing / retreating member 30A includes an erroneous erasure prevention detection lever 31A and a tape type detection lever 33A provided inside the adapter housing 11, and the erroneous erasure prevention detection lever 31A and the tape type detection lever 33A are tapes. The first slide plate 24 and the rear of the storage section 11f of the adapter housing 11 are independent of each other without interlocking with the drawer means 20A.
Shaft 11 provided inside adapter housing 11 between A and
It is provided rotatably around g ₉ and a shaft 11 g ₁₀ .

The left side of the mis-erase prevention detection lever 31A is the detection projections 31a ₁ detects the "presence" of the erasure prevention claw 2b ₁ erroneously correspond to erasure preventing pawl 2b ₁ erroneously formed a small tape cassette 1 provided for, on the other hand, the "presence" of the tape type detecting holes 2b ₂ correspond to the tape type detecting holes 2b ₂ right tape type detection lever 33A is detected protrusion 33a ₁ is formed on the small tape cassette 1 It is provided to detect. Also, the tape pull-out means 20
When A reaches the unloading position, the detection protrusions 31a ₁ and 33a ₁ formed on the erroneous erasure prevention detection lever 31A and the tape type detection lever 33A respectively protrude into the storage portion 11f of the adapter housing 11. Accidental erasure prevention claw 2 formed on the small tape cassette 1 that is biased
b ₁ and the tape type detection hole ₂ b ₂ can be turned back and forth depending on “presence / absence”.

That is, the erroneous erasure prevention detection lever 31A
Is urged clockwise by the torsion spring 32 about the shaft 11g ₉ , and the detection protrusion 31a ₁ formed in a taper shape in the middle of the one end 31a protrudes into the storage portion 11f of the adapter housing 11, A detection portion 31a formed on the rear side surface 11b side of the adapter housing 11 with respect to the detection protrusion portion 31a _1.
2 can cross the first slide plate 24A and face the square hole 11b ₁ formed in the rear side surface 11b. At this time, the position of the square hole 11b ₁ formed on the side surface 11b side after the adapter housing 11 is unified on the standard tape cassette and standards, for the standard type tape cassette adapter 10A accommodating the small tape cassette 1 When mounted in the recording / reproducing apparatus, the detection protrusion 31a _{1 of} the erroneous erasure prevention detection lever 31A protrudes into the storage portion 11f of the adapter housing 11, and the detection portion 31a ₂ is retracted and displaced by the square hole 11b _1. when it is is a state in which the erasure preventing pawl 2b ₁ erroneously formed a small tape cassette 1 is cut out, while indicating non-erasable to the magnetic tape T (unrecordable) by the detection switch of the apparatus, projecting detection The portion 31a ₁ is retracted from the storage portion 11f and the detection portion 31a ₂ is moved to the square hole 11b.
_When it is projected and displaced to the inside of ₁ , the erroneous erasure prevention claw 2b ₁ formed on the small tape cassette 1 remains as it is, and erasure (recording) is possible on the magnetic tape T by the detection switch on the device side. To be able to show.

Further, the tape type detection lever 33A
Is urged in the clockwise direction about the shaft 11g ₁₀ by the right compression spring 34, and the detection protrusion 33a ₁ formed in a taper shape at one end portion (tip portion) 33a is accommodated in the adapter housing 11. The spring locking portion 3 that projects into the portion 11f and locks the compression spring 34 to the other end portion 33b via the shaft 11g _10.
3b ₁ is formed, and further, a through hole 33b ₂ and a shielding portion 33b ₃ are formed in the other end portion 33b so as to face the square hole 14c formed in the bottom plate 14 (FIG. 3).
At this time, the position of the square hole 14c of the bottom plate 14 (FIG. 3) attached to the adapter housing 11 is standardized to the standard tape cassette, and the adapter 10A accommodating the small tape cassette 1 is mounted on the standard tape cassette. When mounted in the recording / reproducing apparatus for recording, when the detection projection 33a _{1 of} the tape type detection lever 33A projects into the housing 11f of the adapter housing 11 and the through hole 33b ₂ is displaced so as to face the square hole 14c. , The tape type detection hole 2b ₂ formed in the small tape cassette 1 is in the “existing” state, which indicates that the high-performance magnetic tape is used by the detection switch on the device side, while the detection protrusion 31a ₁ is stored. when retracted from part 11f shielding portion 33b ₃ is displaced so as to face the square holes 14c, the tape type detection hole 2b ₂ formed in the small tape cassette 1 A state of "no", so that it can be shown that the standard magnetic tape is used by the detection switch on the apparatus side.

In the adapter 10A having the above-described structure, the tape pull-out means 20A is provided when the small tape cassette 1 is not stored in the storage portion 11f of the adapter housing 11.
When the small tape cassette 1 is housed, the tape pull-out means 20A operates and the members 21 to 28 forming the unit 21 to 28 reach the unloading position shown in FIG.
The guide roller 2 that has reached the loading completion position shown in (B) and has moved to the front side surface 11a side of the adapter housing 11.
A front tape path Ta of the magnetic tape T, which is substantially the same as the standard tape cassette, is formed between 3 and 28.

[0022]

By the way, in the conventional small tape cassette adapter (adapter) 10A, as shown in FIGS. 5 (A) and 5 (B), it is housed in the housing portion 11f of the adapter housing 11. The erroneous erasure prevention detection lever 31A and the tape type detection lever 33A, which form the advancing / retreating member 30A that can freely move back and forth with respect to the small tape cassette 1, have detection protrusions 31a ₁ and 33a ₁ formed at the unloading position of the tape pull-out means 20A. Despite the loading completion position, the adapter housing 11 is biased so as to project into the housing portion 11f of the adapter housing 11. Therefore, when the small tape cassette 1 is inserted into the storage portion 11f and when it is taken out from the storage portion 11f, the detection protrusions 31a ₁ and 33a ₁ formed on the erroneous erasure prevention detection lever 31A and the tape type detection lever 33A, respectively. It must be pushed back while resisting the biasing force, and the detection projections 31a ₁ , 33a
₁ becomes a resistance load to the small tape cassette 1.

Further, although not shown, a pop-up type cassette holder is attached to the accommodating portion 11f of the adapter housing 11 to improve the inserting / removing property of the small tape cassette 1 to / from the small tape cassette adapter. .
Here, while the cassette holder serving as a storage portion of the small tape cassette 1 is projected to the outside of the adapter housing 11 to insert and remove the small tape cassette 1, the cassette holder in which the small tape cassette 1 is inserted from a position outside the adapter housing Are integrally housed in the adapter housing 11. Then, when the tape pull-out means 20B reaches the unloading position in the adapter housing 11, the cassette holder into which the small tape cassette 1 is inserted is moved integrally from outside the adapter housing 11 into the adapter housing 11, or When returning to the outside of the adapter housing 11, detection protrusions 31a ₁ and 33a ₁ formed on the erroneous erasure prevention detection lever 31A and the tape type detection lever 33A, respectively, similarly to the above.
Contacts the small tape cassette 1 inserted in the cassette holder, which causes a resistance load particularly when the cassette holder is ejected, and the cassette holder cannot be returned to the outside of the adapter housing 11. Therefore, the small tape cassette 1 cannot be taken out from the cassette holder. There is a possibility that it will not occur.

[0024]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and accommodates a small tape cassette which is formed to have substantially the same size as a standard tape cassette and is smaller than the standard tape cassette. An adapter housing having a storage portion, and movably provided in the adapter housing between an unloading position and a loading completion position,
Tape pull-out means for pulling out a magnetic tape from the small tape cassette stored by moving from the unloading position to the loading completion position to form a front tape path substantially the same as the standard tape cassette, and the tape pulling-out means in the adapter housing. And a retractable member that is retractable from the storage portion at the unloading position of the tape pulling-out means, and is movable back and forth with respect to the stored small tape cassette at the loading completion position of the tape pulling-out means. An adapter for a small tape cassette, which is characterized by being provided.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a small tape cassette adapter according to the present invention will be described in detail below with reference to FIGS.

FIG. 1 is a perspective view showing a tape pull-out means and an advancing / retreating member to / from the small tape cassette in the small tape cassette adapter according to the present invention, and FIG. 2 is a plan view showing the small tape cassette adapter according to the present invention. FIG. 6A is a diagram showing a state where the tape pull-out means has reached the unloading position, and FIG. 6B shows a state where the tape pull-out means has reached the loading completion position.

The small tape cassette adapter 10B according to the present invention (hereinafter also referred to as the adapter 10B) is configured to be substantially the same as the adapter 10A described in the conventional example except for a part thereof. For the sake of convenience, the same members as those shown above are designated by the same reference numerals and the description will be made as needed, and different constituent members are supplemented by the auxiliary symbol “A” of the conventional example. A detailed description will be given by adding "B" as a symbol.

Here, in the adapter 10B according to the present invention, the erroneous erasure prevention detection lever 31B and the tape which constitute the advancing / retreating member 30B which can advance / retreat with respect to the small tape cassette 1 accommodated in the accommodating portion 11f of the adapter housing 11. Interlocking the type detection lever 33B with the tape pull-out means 20B,
Detection protrusions 31a ₁ and 33a formed on the erroneous erasure prevention detection lever 31B and the tape type detection lever 33B when the tape pull-out means 20B reaches the unloading position.
By retracting ₁ from the storage portion 11f of the adapter housing 11, it is obtained by easily configure the insertion and removal of the adapter 10B small tape cassette 1.

That is, in the small tape cassette adapter (adapter) 10B according to the present invention shown in FIG.
The adapter housing 11 for storing the small tape cassette 1 is
The external shape and the internal shape are the same as those of the small tape cassette adapter 10A described above, and the magnetic tape T is pulled out from the accommodated small tape cassette 1 by the tape pull-out means 20B, and is substantially the same as the standard type tape cassette. Front tape path Ta of the magnetic tape T of FIG.
(B)} is formed.

Next, the tape pull-out means 20B has a first
Only the shape of the slide plate 24B is different from that of the first slide plate 24A described above, and the drive gear 21, the winding side tape pull-out arm 22, the connecting arm 25, the second slide plate 26, the supply side tape pull-out arm 27, etc. Use the same constituent members, and the connecting means for transmitting the driving force from the drive gear 21 to the winding-side tape pull-out arm 22 and the supply-side tape pull-out arm 27 are the same.

The first slide plate 24B has a right end portion 24.
The right end slide contact surface 24a ₃ is linearly formed on the upper side surface on the a side, and a concave trapezoidal cam portion 24b ₂ is formed in a substantially trapezoidal shape by being recessed from the upper side surface to a substantially middle portion 24b. An intermediate sliding surface 24b ₃ is linearly formed on the upper side surface of the side of the concave trapezoidal cam portion 24b ₂ so as to be connected to the left side thereof. The right end sliding contact surface 24a ₃ corresponds to the tape type detection lever 33B described below, and the concave trapezoidal cam portion 2
4b ₂ and the intermediate portion sliding contact surface 24b ₃ correspond to the erroneous erasure prevention detection lever 31B described below.

Next, in the adapter 10B according to the present invention, the advancing / retreating member 30B capable of advancing / retreating with respect to the small tape cassette 1 accommodated in the accommodating portion 11f of the adapter housing 11.
Will be described. In the embodiment, the advancing / retreating member 30B is composed of an erroneous erasure prevention detection lever 31B and a tape type detection lever 33B.
1B and the tape type detection lever 33B are the same as those described above except the portion interlocking with the tape pull-out means 20B.
It has substantially the same shape and function as A, and, of course, the erroneous erasure prevention claw 2b formed on the small tape cassette 1.
_1, in which is provided to detect the "presence" of the tape type detecting holes 2b _2.

That is, the erroneous erasure prevention detection lever 31B on the left side
Is a part of the erasure prevention detection lever 31A described above.
The shape is different, and the detection protrusion 31a₁And detector 3
1a _TwoOne end portion 31a and the shaft 11g forming the₉Other through
The end portion 31b is extended to contact the contact portion 31b.₁Is the first slide plate
It is formed so as to project to the 24B side. This erasure prevention detection level
The bar 31B has a shaft 11g by a torsion spring 32.₉Inside
The contact portion 31b is biased clockwise in the heart.₁Is the first
As the slide plate 24B moves, the sliding contact surface 24b of the intermediate portion_Three
Or concave trapezoidal cam portion 24b_TwoTo come into contact with
It

The tape type detecting lever 33B on the right side is partially different in shape from the tape type detecting lever 33A described above, and one end portion 3 having the detection protrusion 33a ₁ is formed.
The other end 33b via the shaft 3g and the shaft 11g ₁₀ includes a spring-locking portion 33b ₁ , a through hole 33b ₂ , a shield 33b ₃ , and a first tapered cam portion 33b ₄ to the left of the shield 33b ₃ .
It is formed so as to protrude toward the slide plate 24B. The tape type detection lever 33B is attached to the shaft 11 by the compression spring 34.
g ₁₀ is biased clockwise around the tapered cam portion 33b ₄ abuts or or right end sliding surface 24 to the right end portion sliding surface 24a ₃ with the movement of the first slide plate 24B
The contact is released from a ₃ .

Next, with respect to the operation of the erroneous erasure prevention detection lever 31B and the tape type detection lever 33B which form the advancing / retreating member 30B, which is a main part, in the adapter 10B having the above-mentioned configuration, FIGS. Explain.

The state shown in FIG. 2A is the adapter 10.
In the initial state in which the small tape cassette 1 is not stored in the storage portion 11f in B, the tape pull-out means 2
0B is in the state of reaching the unloading position. In the tape pull-out means 20B, the drive gear 21 is stopped, and the winding-side tape pull-out arm 22, the first slide plate 24B, the connecting arm 25, the second slide plate 26, and the supply-side tape pull-out connected to the drive gear 21. The arm 27 has reached the unloading position shown. Here, in particular, the first slide plate 24B for operating the erroneous erasure prevention detection lever 31B and the tape type detection lever 33B.
Has moved to the unloading position to the right (direction of arrow X ₂ ).

That is, the erroneous erasure prevention detection lever 31B is biased clockwise about the shaft 11g ₉ by the torsion spring 32, but the contact portion 31b ₁ has the first slide plate 2a.
Since 4B are in contact with the intermediate portion sliding surface 24b ₃ of the erase prevention detection lever erroneous 31B is rotated counterclockwise against the torsion spring 32. Therefore, the detection protrusion 31a _{1 of} the erroneous erasure prevention detection lever 31B also rotates counterclockwise,
The projecting portion 31a ₁ for detection is the storage portion 11 of the adapter housing 11.
Evacuated from f.

On the other hand, the right end of the tape type detecting lever 33B is the thigh that is biased about a shaft _{11g 10} in the clockwise direction by the compression spring 34, protruding tip of the tapered cam portion 33b ₄ first slide plate 24B since the parts sliding surface 24a ₃ abuts, the tape type detecting lever 33B is rotated in the counterclockwise direction against the compression spring 34. Therefore,
The detection protrusion 33a ₁ of the tape type detection lever 33B also rotates counterclockwise, and the detection protrusion 33a ₁ is retracted from the storage portion 11f of the adapter housing 11.

As described above, the tape pull-out means 20A
Along with the movement of the first slide plate 24B, which constitutes the above, to the unloading position, the detection protrusions 31a _{1 of} the erroneous erasure prevention detection lever 31B and the tape type detection lever 33B,
Since 33a ₁ is retracted from the storage portion 11f of the adapter housing 11, the adapter housing 11 of the small tape cassette 1
Of the detection protrusions 31a ₁ and
Since 33a ₁ does not contact the small tape cassette 1, the small tape cassette 1 can be inserted into and removed from the adapter 10B without a feeling of resistance. In addition, the detection protrusions 31a ₁ ,
33a ₁ does not need to have a tapered tip.

In the state shown in FIG. 2B, the small tape cassette 1 is stored in the storage portion 11f in the adapter 10B, and the magnetic tape T which is substantially equivalent to the standard type tape cassette.
The front tape path Ta is formed and the tape pull-out means 20B has reached the loading completion position. The tape pull-out means 20B rotates the drive gear 21 in the counterclockwise direction, and the take-up side tape pull-out arm 22 and the first slide plate 2 connected to the drive gear 21.
4B, the connecting arm 25, the second slide plate 26, and the supply-side tape pull-out arm 27 reach the loading completion position shown in the figure. Here, especially, the erasure prevention detection lever 31B
The first slide plate 24B for operating the tape type detection lever 33B moves from the unloading position on the right side (arrow X ₂ direction) to the loading completion position on the left side (arrow X ₁ direction).

That is, the erroneous erasure prevention detection lever 3 is moved along with the movement of the first slide plate 24B to the loading completion position.
The concave trapezoidal cam portion 24 in which the contact portion 31b _{1 of} 1B is connected to the intermediate slide contact surface 24b _{3 of} the first slide plate 24B.
Since it enters the inside of b ₂ , the erroneous erasure prevention detection lever 31B rotates clockwise about the shaft 11g ₉ by the urging force of the torsion spring 32. Therefore, the erasure prevention detection lever 31
The detection protrusion 31a _{1 of} B also rotates clockwise, and the detection protrusion 31a ₁ can enter the storage portion 11f of the adapter housing 11. Here, small tape cassette 1
If the erroneous erasure prevention claw 2b ₁ formed on the above is notched, the detection protrusion 31a ₁ maintains the entry state, and if the erroneous erasure prevention claw 2b ₁ is left as it is, the detection protrusion 31a ₁
Rotates in the direction of retracting (counterclockwise) while contacting the erroneous erasure prevention claw 2b ₁ .

On the other hand, with the movement of the first slide plate 24B to the loading completion position, the tape type detection lever 3
3B tapered cam portion 33b ₄ is the first slide plate 24B
Since it is released the contact from the right end sliding surface 24a ₃ of the tape type detecting lever 33B pivots clockwise around the shaft 11g ₁₀ by the urging force of the compression spring 34. Therefore, the detection protrusion 33a of the tape type detection lever 33B
₁ also rotates in the clockwise direction, and the detection protrusion 33a ₁ can enter the storage portion 11f of the adapter housing 11. Here, the tape type detecting holes 2b ₂ detection projections 33a ₁ if the state of "presence" formed in the small tape cassette 1 maintaining the entry conditions, if the state of the tape type detecting holes 2b ₂ is "no" For example, the detection protrusion 31a ₁ is a small cassette housing 2
While contacting the rear side surface 2b, the rear side surface 2b is rotated in the retracting direction (counterclockwise direction).

As described above, when the first slide plate 24B reaches the loading completion position, the erroneous erasure prevention claws 2b ₁ and the tape type detection hole 2b ₂ formed on the small tape cassette 1 are formed.
The erasure prevention detection lever 31B and the tape type detection lever 33B can be moved back and forth with respect to the small tape cassette 1 depending on "presence or absence". Further, after the small tape cassette 1 is housed in the adapter 10B and the front tape path Ta of the magnetic tape T which is substantially the same as the standard tape cassette is formed, the adapter 10B is mounted in the standard tape cassette recording / reproducing apparatus. For example, thereafter, as described above, the states of the erroneous erasure prevention detection lever 31B and the tape type detection lever 33B can be known on the device side.

In the small tape cassette adapter 10B according to the present invention, a pop-up type cassette holder (not shown) can be attached to the housing portion 11f of the adapter housing 11 as described in the conventional example. Is. At this time, the tape pull-out means 20B inside the adapter housing 11
The cassette holder into which the small tape cassette 1 has been inserted when the adapter has reached the unloading position.
1 is integrally moved from the outside into the adapter housing 11 or returned to the outside of the adapter housing 11, the detection protrusions 31a ₁ and 33a ₁ formed on the erroneous erasure prevention detection lever 31A and the tape type detection lever 33A, respectively. Is the adapter housing 11
Since the detection protrusions 31a ₁ and 33a ₁ do not come into contact with the small tape cassette 1 inserted in the cassette holder, the small tape cassette 1 is resistant to insertion / removal via the cassette holder. You can do it without feeling. In addition, the cassette holder is attached to the adapter housing 1.
Since it is not necessary to increase the urging force of the spring member for returning to the outside, the operability of the cassette holder can be favorably maintained.

In the embodiment, as the advancing / retreating member 30B,
Accidental erasure prevention detection lever 31B and tape type detection lever 3
However, the reel brake member for locking the supply reel 3 and the take-up reel 4 housed in the small tape cassette 1 may be included as the advancing / retreating member 30B. The brake member is retracted from the small tape cassette 1 according to the unloading position of the tape pull-out means 20B, and is brought into contact with the supply reel 3 and the take-up reel 4 according to the loading completion position.
The reel brake releasing member on the device side may release the locking of the reel brake member.

[0046]

According to the adapter for a small tape cassette according to the present invention, which has been described in detail above, the advancing / retreating member which moves forward / backward with respect to the small tape cassette accommodated in the accommodating portion in the adapter housing is interlocked with the tape pull-out means, and the tape Since the advancing / retreating member is retracted from the storage section at the unloading position of the drawer, the advancing / retreating member does not come into contact with the small tape cassette when the small tape cassette is inserted / removed to / from the adapter. Can be done without.

Further, for example, when a pop-up type cassette holder is attached to the accommodating part of the adapter housing to form a small tape cassette adapter, the small tape cassette is located when the tape pull-out means is in the unloading position in the adapter housing. When the cassette holder in which the insert is inserted is integrally moved from the outside of the adapter housing into the inside of the adapter housing or returned to the outside of the adapter housing, the advancing / retreating member is in a state of being retracted from the accommodating portion of the adapter housing. Since it does not come into contact with the small-sized tape cassette inserted in, the small-sized tape cassette can be inserted / removed through the cassette holder in the same manner as described above without feeling a resistance.
Further, since it is not necessary to increase the biasing force of the spring member for returning the cassette holder to the outside of the adapter housing, the operability of the cassette holder can be favorably maintained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a tape pull-out means and an advancing / retracting member to / from a small tape cassette in an adapter for a small tape cassette according to the present invention.

FIG. 2 is a plan view showing a small tape cassette adapter according to the present invention, (A) showing a state in which the tape pull-out means reaches an unloading position, and (B) showing a tape pull-out means in a loading completion position. The state has reached.

FIG. 3 is a perspective view showing external shapes of a conventional small tape cassette adapter and a small tape cassette.

FIG. 4 is a perspective view showing a tape pull-out means and an advancing / retreating member to / from the small tape cassette in the conventional small tape cassette adapter.

5A and 5B are plan views showing a conventional small tape cassette adapter, in which FIG. 5A shows a state in which the tape pull-out means has reached an unloading position, and FIG. 5B shows a state in which the tape pull-out means has reached a loading completion position. Shows the closed state.

[Explanation of symbols]

1 ... Small tape cassette, 2 ... Small cassette housing, 2b
₁ ... Erase prevention nail, 2b ₂ ... Tape type detection hole, 10B
… Small tape cassette adapter (adapter), 11…
Adapter housing, 11f ... Storage section, 20B ... Tape pull-out means, 30B (31B, 33B) ... Advancing / retracting member, 31B
... erroneous erasure prevention detection lever, 31a ₁ ... detection protrusion, 3
3B ... Tape type detection lever, 33a ₁ ... Detection protrusion, T ... Magnetic tape, Ta ... Front tape path.

Claims (1)

[Claims] 1. An adapter housing, which is formed to have substantially the same size as that of a standard type tape cassette and has a storage section for storing a small tape cassette smaller than the standard type tape cassette, and an unloading position in the adapter housing. And a loading completion position are movably provided, and a magnetic tape is pulled out from the small tape cassette stored by moving from the unloading position to the loading completion position, and a front tape path substantially the same as the standard tape cassette is formed. The tape pulling-out means to be formed and the adapter housing are provided in conjunction with the tape pulling-out means. The tape pulling-out means retracts from the storage portion at the unloading position, while the tape pulling-out means stores the tape at the loading completion position. It can move back and forth with respect to the small tape cassette. Small tape cassette adapter, characterized by comprising a retraction member.