JPS58212680A - Cassette adaptor - Google Patents

Abstract

PURPOSE:To prevent a tape from damages due to misoperation, by guiding a projection formed on the side of a case having the same size as a standard size tape cassette into the case when a tape is unloaded from a small-sized tape cassette charged in the inside of the case. CONSTITUTION:A movable projection 37 is formed on the side of the case body having the same size as the standard size tape cassette. A small-sized tape cassette (not shown in figure) is charged in the case body, a coupling arm 13 is turned in the clockwise direction and a guide roll 12 fitted to the leading end of an unloading arm 11 is moved in the direction of an arrow A through the arm 11 to abut the guide roll 12 to a locking part 32. Simultaneously, a slide arm 34 pushes up a locking member 29 through a cum 36 to lock the guide roll 12 at a position A' and the slide arm 34 is interlocked with an operation arm 40 to guide the movable projection 37 into the case body against a spring 38, so that the case body can be charged in a deck. Consequently, misoperation is prevented and the tape can be prevented from damages.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a tape cassette (hereinafter referred to as a second tape cassette) which is a conventional tape cassette (hereinafter referred to as a first tape cassette) with a smaller external shape by narrowing the distance between the reels. The present invention relates to a cassette adapter that allows the first tape cassette to be used in a device used in the first tape cassette.

Compared to compact tape cassettes for audio, tape cassettes used in video tape recorders, etc. are considerably larger due to standards such as tape width and distance between reels, and even in portable equipment, Since the tape cassette is large, there is a limit to its miniaturization, which is a major problem.

Still, with current technology, it is difficult to make small tape cassettes with narrow tape widths, due in part to problems with image quality.

For this reason, as a means of downsizing tape cassettes and equipment, the tape width is the same as the conventional first tape cassette, and the distance between the reels is the same as that of the first tape cassette. It has become possible to consider a small second tape cassette that has a tape amount of approximately % to % of the full-size first tape cassette. .

With such a small second tape cassette, it is possible to obtain the same image quality as the current first tape cassette, and not only can the tape cassette itself be made smaller, but also the equipment that uses the tape cassette can be made smaller. Although miniaturization can be realized, as a matter of course, since the amount of tape is reduced, the recording time is shorter than that of the current first tape cassette. When considering recording time and miniaturization, it is desirable to change the tape cassette used depending on the purpose, etc., and it is desirable to use a small second tape cassette that is compatible with the first tape cassette. In other words, the cassette adapter is required to be usable in equipment that uses the first tape gusset, and a cassette adapter that satisfies this requirement becomes necessary.

In such a cassette adapter, the present invention provides a second
The purpose of this is to prevent a tape cassette from being loaded into a magnetic recording/reproducing device unless it is stored in the tape cassette.

Hereinafter, an embodiment of the cassette adder-free of the present invention will be explained using the drawings of FIGS. 1 to 4.

In the figure, 1 is a second tape cassette, and this second tape cassette 1 rotatably supports and stores reels 4 and 5 wound up with magnetic tape 3 in a half case 2, and also has a front surface. It is constructed by forming a predetermined running path such that the magnetic tape 3 is exposed to the outside on the side. In this second tape cassette 1,
The reel 4 on the one supply side can be operated from the bottom side of the half case 2 through a window provided at the bottom of the half case 2, and the tip of the equipment reel stand fits into the internal hollow part and locks the reel 4 on the other side. The reel 5 on the pick-up side is rotatably supported by a reel shaft (not shown) implanted in the half case 2, and has a gear portion 5a formed on its outer periphery. It is rotated by a gear on the drive source side that meshes with the gear portion 5a through the window.

6 is the main body case of the adapter, and this main case 6
has the same external dimensions as the first tape cassette, and the second tape cassette 1 is loaded into this main body case 6. In this main body case 6, a reel gear 7 that can be attached to the tip of one of the reel stands is rotatably supported and disposed at a position corresponding to the reel stand of the video tape recorder, and a reel gear 7 that can be attached to the tip of one of the reel stands is rotatably supported. A window (not shown) is provided at the tip to allow the reel 4 of the second tape cassette 1 to be attached. One gear of an idler gear 8 having a two-stage gear structure meshes with the reel gear 7, and the other gear of the idler gear 8 meshes with the second gear.
The gear portion 5a of the reel 6 of the tape cassette 1 meshes with each other,
The rotation of the reel gear 7 causes the reel 5 of the second tape cassette 1 to rotate, causing the magnetic tape 3 to travel.

This main body case 6 is provided with a free needle-like take-up arm 9 that rotates about a shaft 9a, and at one end of the take-up J111 pull-out arm 9, a second pull-out arm 9 is provided. A guide roller 1o is attached for hooking the magnetic tape 3 of the tape cassette 1 and pulling it out to a predetermined position.

In addition, a supply side pullout arm 11 is provided with a shaft 11a at a position facing the take-up side pullout arm 9 of the main body case 6.
Similarly to the pickup arm 9, the magnetic tape 3 of the second tape cassette 1 is hooked onto one end of the supply side pullout arm 11, and the magnetic tape 3 of the second tape cassette 1 is hooked to a predetermined position. A guide roller 12 is attached for pulling out to the position shown in FIG. A knob 11b is provided at the other end of this supply side drawer arm 11, and the knob 11
b is fitted into an elongated hole 13b of a dogleg-shaped connecting arm 13 arranged to rotate about a shaft 13a.

Further, a knob 13c is provided at the other end of the connecting arm 13, and the knob 13c is fitted into a long hole 14b of the connecting arm 14, which is arranged to rotate about a shaft 14a.

The other end of the connecting arm 14 engages with a knob 9b provided at the other end of the pick-up side pull-out arm 9.

Reference numeral 16 denotes a drive rack in which a pinion gear 16 that is manually rotated over a drive source such as a motor meshes with the drive rack, and a cam groove 15a into which the knob 9b of the pickup arm 9 is fitted is provided on the lower surface of the drive rack 16. It is being

The cam groove 15a of the drive rack 15 has the drive rack 1
There is a part that is parallel to the moving direction of the cam 6 and a part that is inclined, and as shown in FIG. The pull-out arm 9 and the Saglai-side pull-out arm 11 are spread outward and are in the tape guide position of the first tape cassette, and the knob 9b of the pick-up side pull-out boom 9 is still in the cam groove 15a, as shown in FIG. When in the inclined portion, the pick-up side pull-out arm 9 and the supply-side pull-out arm 11 move one step inward, and are in the state before being pulled out.

Also, λ, a cam surface 16c having a groove 15b is provided on the upper surface of the drive rack 16, and the tip of an arm 17 that is rotatable about a shaft 17a is in contact with the cam surface 16c, so that the drive rack '15 can be moved to a predetermined position. When the arm 17 moves to the position , the tip of the arm 17 fits into the groove 15b, and the arm 17 rotates around the shaft 17a. At the tip of this arm 17,
L-shaped connecting angle 1 that can freely rotate around the shaft 18a
8 are connected via a connecting arm 19, and the displacement of the arm 17 is transmitted to the connecting angle 18.

Oh, in the long hole 18b at the other end of this connecting angle 18,
Knob 2 of guard panel opening/closing rod 21 that is guided by guide shaft 20 and slides in the width direction of main body case 6
1a is inserted. That is, by fitting the tip of the arm 17 into the groove 15b of the cam surface 15c of the drive rack 16, the guard panel opening/closing rod 21 slides toward the rear side of the main case 6, and the tip of the arm 17 fits into the groove 15b. When it is not inserted, the guard panel opening/closing rod 2
1 slides toward the front side of the main body case 6.

Reference numeral 22 denotes a guard panel that is openable and closable at the front opening of the main body case 6 of the adapter, and the shafts at both ends of the guard panel 22 are inserted into bearing holes provided in the side plates of the main body case 6. , is rotatably supported.

Reference numeral 23 denotes a locking member on the take-up side that is rotatably supported by a shaft 24, and this locking member 23 is
A spring 26 whose one end is engaged with a protrusion 26 is constantly biased in a direction away from the lock portion 27 of the main body case 6 . The protrusion 21b of the guard panel opening/closing rod 21 is engaged with the rear end of the locking member 23 via a plate spring 28, and as the guard panel opening/closing rod 21 slides toward the rear side of the main case 6, Lock member 2
3 is pushed by the protrusion 21b, thereby the locking member 23 rotates around the shaft 24, and together with the locking portion 27, the shaft of the guide roller 10 is clamped. Also,
The return to the original position is effected by the spring 26.

Reference numeral 29 denotes a locking member on the supply side. This locking member 29 is rotatable around an axis 3δ, and is constantly urged by a spring 31 in a direction away from the locking portion 32 of the main body case 6. The rear end of this lock member 29 is in contact with the tip of a slide arm 33 that is guided by a guide plate 33 and slides in the width direction of the main body case 6, and this slide arm 34 pushes the rear end of the lock member 29. As a result, the locking member 29 rotates around the shaft 30 and clamps the shaft of the guide roller 12 together with the locking portion 32 .

Further, a leaf spring 36 is attached to the rear end of the slide arm 34.
is attached to the plate spring 36, and a cam plate 36 rotatably attached to the shaft 13a of the connecting arm 13 is in contact with the plate spring 36. This cam plate 36 is connected to the drive rack 15.
When the operating arm 16d pushes and rotates the cam plate 41, the slide arm 34 is pushed by the cam plate 36 via the plate spring 35, and the slide arm 34 slides toward the front side of the main body case 6.

Reference numeral 37 denotes a locking piece that can freely protrude and retract from the side surface of the main body case 6. As shown in FIG. 6 and is constantly biased by a spring 38 disposed on the shaft 37a so as to protrude outward from the side surface of the main body case 6. A cam surface 37c having a groove 37b is provided on the upper surface of the locking piece 37, and a protruding piece 40 of an operating arm 40 rotatable about a shaft 39 is provided in the groove 37b. 'a is in contact. Furthermore, the other end of this operating arm 4o has a long hole 4o.
b is provided, and the slide arm 34 is provided in the elongated hole 40b.
The knob 34a is fitted.

4a and 4b show the operation of the locking piece 37, that is, when the slide arm 34 slides toward the front side of the main case 6 to draw out the tape, the slide arm 34
The operating arm 40 engaged with the knob 34a of No. 4 is connected to the shaft 39.
The protruding piece 40a of the operating arm 40 presses the wall surface of the groove 37b of the locking piece 37, so that the locking piece 37 is retracted into the main body case θ as shown in FIG. 4a.

On the other hand, when the slide arm 34 slides toward the rear side of the main case 6 to accommodate the tape, the shaft 40 of the operating arm 40
Since a does not press the wall of the groove 3 of the locking piece 3, the 4th
As shown in the figure, the locking piece 37 is projected outward from the side surface of the main body case 6 by a spring 38. At this time, the locking piece 37
Since it is only biased by the spring 38, it can be pulled into the main body case 6 by pushing it with a finger or the like.

That is, in the present invention, the locking piece 37 is biased by the spring 38 in the direction of protruding outward from the side surface, and the guide roller 10.12 is fixed at a predetermined tape guide position when the tape drawing operation is completed. Pick member 23.2
9, the locking piece 37 protrudes from the side of the main case 6 until after the second tape cassette 1 is stored and the tape is pulled out. Otherwise, it cannot be loaded into the magnetic recording and reproducing device, and this prevents the magnetic recording and reproducing device from malfunctioning due to incorrect operation.
Moreover, since the locking piece 37 protrudes from the side surface by being biased by the knob 38, the user may accidentally drop the cassette adapter or push the locking piece 37 when using the cassette adapter. If a force is applied in this direction, the locking piece 37 will not be damaged because the locking piece 37 will be pulled into the main body case θ.

As described above, according to the cassette adapter of the present invention, the second tape cassette cannot be loaded into the magnetic recording device until after it has been stored and the tape has been pulled out. This prevents damage, and the locking piece is biased by a spring in the direction of protruding outward, so if you accidentally drop the cassette adapter and apply excessive force to the locking piece. However, this prevents the locking piece from being damaged.

[Brief explanation of drawings]

FIG. 1 is a plan view of the cassette adapter according to an embodiment of the present invention showing the state when the tape is pulled out, FIG. 2 is a plan view of the same cassette adapter showing the state when the tape is stored, and FIG. FIGS. 4a and 4b are perspective views showing the main structure of the cassette adapter, and FIGS. 4a and 4b are plan views for explaining the operation of the parts shown in FIG. 3. 1...Second tape cassette, 2...
No. 1 - Case, 3...Magnetic tape, 4, 6
... Reel, 6 ... Body case, 7.
...Reel gear, 8...Idler gear,
9...Tick-up side drawer arm, 1012.
...Guide roller, 11...Supply side pull-out arm, 13, 14...Connection arm, 16
... Drive rack, 23, 29 ... Lock member, 37 ... Locking piece, 38 ... Spring.

Claims (1)

[Claims] a main body case that houses a second tape cassette having a shorter reel-to-reel distance than the first tape cassette and has the same dimensions as the first tape cassette; a tape drawer/accommodating means that performs a pull-out operation for pulling out a magnetic tape from a tape cassette to a tape guide position of a first tape cassette and a storage operation for accommodating the magnetic tape in a second tape cassette; a reel driving means for driving a reel of a second tape cassette housed in the case; the main case is provided with a locking piece that can be freely protruded and retracted from a side surface of the main case; A cassette adapter is provided with a spring that constantly biases the tape in the direction of protruding to the outside, and is configured such that the locking piece is pulled into the main body case when the tape drawing operation is completed.