JPS58212669A - Cassette adaptor - Google Patents

Abstract

PURPOSE:To charge a tape drawn from a small-sized tape cassette put in a case body having the same size as a standard size tape cassette into the tape cassette again smoothly by engaging a driving rack with a winding gear through a planetary gear. CONSTITUTION:The small-sized tape cassette is put in the case body having the same size as the standard size tape cassette. When the tape 3 is drawn by levers 9, 11 and a guide ball so as to be loaded as shown in the figure and the driving rack 15 is moved to the right, the levers 9, 11 are closed to the inside by the rink means at the pre-stage, but at the post-stage, the cum part 22a of a planetary gears 21 is interlocked with L-shaped levers 17, 19 and pushed out, a gear 25 is abutted to a reel gear 7 on the winding side and the reels are driven through an idler 8 to put in the tape 3. Consequently, putting in of the tape is smoothly completed independently of the remaining length of the tape and the tape is prevented from unreasonable tension.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a tape cassette (hereinafter referred to as a second tape cassette) which has a smaller outer shape by narrowing the distance between the two wires by 1'tlF, k compared to a normal tape cassette (hereinafter referred to as a first tape cassette). This invention relates to a cassette adapter for use in a device in which a first tape cassette is used.

Compared to compact tape cassettes for audio, tape cassettes used in video tape recorders, etc. have a much larger external shape due to standards such as tape width and distance between reels, and are not suitable for portable equipment. However, since the tape cassette is large, there is a limit to miniaturization, which is a major problem.

Unfortunately, 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 that of the conventional first tape cassette, and the distance between the reels is the same as that of the first tape cassette. It is conceivable to create a small second tape cassette with a tape capacity of about 1/2 of that of the full-sized first tape cassette, and the amount of tape is about 1/4 to 1/6 of that of the full-sized first tape cassette. It's starting to look like this.

Such a small second tape cassette not only provides the same image quality as the current first tape cassette, but also allows the tape cassette itself to be made smaller.
Although it is possible to downsize equipment using tape cassettes, the amount of tape is naturally reduced, so the recording time is shorter than that of the current first tape cassette. When considering recording time and downsizing, it is desirable to change the tape cassette used depending on the application, etc. The first tape cassette is required to be compatible, that is, to be usable with equipment that uses the first tape cassette, and a cassette adapter is needed to satisfy this requirement.

The present invention provides such a bristle throat adapter in which the second
The overall purpose of this device is to enable smooth extraction and storage of magnetic tapes from tape cassettes.

Hereinafter, an embodiment of the cassette adapter 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 6 wound 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,
One reel 4 on the supply side can be operated from the bottom side of the half case 2 through a window (not shown) provided at the bottom of the half case 2, so that the tip of the reel stand of the equipment is inside. The reel 5 on the other pick-up side is rotatably supported by a reel shaft (not shown) implanted in the half case 2, and has a gear part on the outer periphery. 5a is formed, and is rotated by a gear on the drive source side that meshes with the gear portion 6a through a window on the side surface of the half case 2.

6 is the main body case of the adapter, and this main body case 76
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, at a position corresponding to the reel stand of the video tape recorder, a reel gear holder which can be attached to the tip of one of the reel stands is rotatably supported and arranged. 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. Further, winding of the magnetic tape 3 is performed by a supply side roll 4.

A pick-up side pull-out arm 9 in the shape of a fishing needle is arranged in the main body case 6 so as to rotate around an axis 9a'iz, and a second pull-out arm 9 is provided at one end of the pick-up side pull-out arm 9. A guide roller o is attached for hooking the magnetic tape 3 of the tape cassette 1 and pulling it out at a predetermined position.

However, the supply side drawer arm 11 has a shaft 11a at a position opposite to the take-up side drawer arm 9 of the main body case 6.
The magnetic tape 3f of the second tape cassette 1 is attached to one end of the supply side drawer arm 11, similarly to the pickup side drawer arm 9. A guide roller 12 is attached to pull it out to a predetermined position.

At the other end of this supply side drawer arm 11, there is a knob 11b.
The knob 11b is fitted into the square hole 13b of the dog-shaped connecting arm 13, which is arranged to rotate around the shaft 13ai. Furthermore, this connecting arm 1
A knob 13c is provided at the other end of the connecting arm 14, and the knob 13c is fitted into a square hole 14b of the connecting arm 14, which is arranged to rotate about the shaft 14ai. The other end of the connecting arm 13 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 that is moved manually or by a drive source such as a motor, and is engaged with a pinion gear 16.
A cam groove 16a into which the knob 9b of the pick-up side pull-out arm 9 fits is provided on the lower surface of the pull-out arm 6. The cam groove 15alC of the drive rack 15 has a portion parallel to the moving direction of the drive rack 15 and a portion inclined. An L-shaped cam groove 1 is formed on the upper surface of the bent drive rack 15.
6b is provided, and its cam groove 15bvC is connected to the shaft 17a (
Knob 1 with L-shaped connecting angle 1 that rotates around H center
7b is fitted. One end of the connecting angle 17 is connected to one end of a guard panel opening/closing rod 19 that slides while being guided by a guide shaft 18. That is, as the connecting angle 17 rotates around the shaft 17a, the guard panel opening/closing rod 19 moves toward the guide shaft 18.
slide guided by. Further, the pinion gear 16 is rotatably supported by a shaft 16a, and a gear 16b that rotates together with the pinion gear 16 is provided coaxially with the pinion gear 16. Reference numeral 20 denotes a guard panel that is arranged to be openable and closable on the front side of the main body case 6 of the adapter, and the shafts 20a and 20b of this guard panel 20 are inserted into bearing holes provided in the side plates of the main body case 6. and the girt panel opening/closing rod 19
It is opened and closed by 21 is a planetary gear device, and this planetary gear device 21, as shown in FIGS. 3 and 4,
Shafts 23a, 23 attached to U-shaped gear frame 22
The main gear 24 and the child gear 26, which mesh with each other, are rotatably supported and arranged in the main gear 24b. The shaft 23a of the U-shaped gear frame 22 is rotatably attached to the other end of a fixed frame 26, one end of which is attached to a shaft 16a that rotatably supports the pinion gear 16. The device 21 is rotatable about an axis 23a.

Further, the shaft 23avc is rotatably supported by a ratchet gear 27 that meshes with the gear 1ebVc of the pinion gear 16, and has saw teeth 27aKtri on the lower surface of the ratchet gear 27, and a leaf spring fixed to the parent gear 24. The pawls 24a are engaged with each other, and the ratchet gear 2
Rotation is transmitted to the parent gear 24 only when the gear 7 rotates clockwise, and is not transmitted when the gear 7 rotates counterclockwise. Further, the shaft 23b VCn and a gear 28 that can mesh with the reel gear 7 are rotatably supported, and
The upper surface of the gear 28 - [fl-I, the lower surface of the child gear 26 is in pressure contact with the bottom surface of the child gear 26 via the felt) 30i due to the pressing force of the spring 29 disposed on the shaft 23b, and the gear 28 rotates together with the child gear 26. In addition, when a torque is applied to the fixed plate, it is configured to slip between the plate and the ferrule 30. Furthermore, the gear frame 22VcIr
l. A projecting piece 22a that engages with the cam piece 19a of the guard panel opening/closing rod 19 is provided, and when the guard panel opening/closing rod 19 moves, the projecting piece 22a is moved from the cam piece 19ag.
2a is pushed, the gear frame 22 is moved to the shaft 23.
The gear 28 meshes with the reel gear 7 by rotating around a. The gear frame 22 is then moved to the gear 28 by the spring 31.
is biased in the direction away from the reel gear 7, and by returning the guard panel opening/closing rod 19 to its original position and releasing the pushing of the gear frame 22 in the direction of the reel gear 7, the gear 2B moves away from the reel gear 7. In such a configuration, when the drive rack 15 starts to move rightward from the state shown in FIG. , the take-up side pull-out arm 9 does not rotate.

On the other hand, the connection angle 17 is connected to the knob 1, but the drive rack 1
Since it is located at the right-angled portion of the cam groove 15b of No. 6, the guard panel opening/closing rod 19 rotates in the direction of the arrow in FIG.
To press a'1, the guard flap 20 rotates around the shaft 20bi and opens.

Then, when the drive rack 15 further moves to the right and the knob 9b of the pick-up side pull-out arm 9 comes to the part inclined with respect to the moving direction of the cam groove 15a, the pick-up side pull-out arm 9 moves further to the right. Rotate in the direction of the arrow. As a result, the connecting arm 14 engaged with the knob jab also
The connecting arm 13 connected to the connecting arm 14 also rotates around the axis 13ai, thereby causing the supply side drawer arm 11 to rotate around the axis 11a in the direction of the arrow. .

When the pick-up side pull-out arm 9 and the supply-side pull-out arm 11 rotate inward in this way, by rotating the reel 6 with the reel gear 7, the half-case The magnetic tape 3 that had been pulled out of the half case 2 is now housed inside the half case 2. Second
As shown in the figure, the second tape cassette 1 can be taken out from inside the adapter by housing the magnetic tape in the case 2.

By performing the opposite operation to this operation, the magnetic tape 3 can be pulled out from inside the half case 2 to the same tape guide position as the first tape cassette (the state shown in Figure 1). 1st tape cassette'
The second tape cassette can also be used in devices that use the tape cassette.

Now, to explain the operation when the reel 6 winds up the magnetic tape 3, the drive rack 15 starts to move rightward from the state shown in FIG. 1, and the guard panel opening/closing rod 19 moves in the direction of the arrow in FIG. When it moves, the protruding piece 22a of the gear frame 22 of the planetary gear device 21 is pushed by the cam piece 19a of the guard panel opening/closing rod 19, and the planetary gear device 2
1 rotates around the shaft 23ai, and the gear 28 rotates around the reel gear 7.
mesh with. At this time, gear 1 of pinion gear 16
Since the ratchet gear 27 that meshes with eb rotates clockwise,
The rotation of the pinion gear 16 is transmitted to the gear 28 via the ratchet gear 27, the parent gear 24, the child gear 26, and the I felt 30, and when the gear 28 meshes with the reel gear 7, the reel gear 7 is The reel 6 on the pick-up side starts rotating in the direction
The magnetic tape 3 can be wound onto the reel 6 by rotating the pick-up side pull-out arm 9 and the supply-side pull-out arm 11 inwardly.

By the way, when the knob 17b of the connecting angle 17 is in a portion parallel to the moving direction of the cam groove 1sb of the drive rack 15, the gear 28 of the planetary gear device 21 is always in mesh with the reel gear 7. When the drive rack 15 moves to the left in FIG. 2 when drawing out the tape, the gear 16b of the pinion gear 16 rotates to the right and the ratchet gear 27 rotates to the left. Gear 24 pawl 24a does not lock, ratchet gear 27
Since the rotation of the reel gear 7 is not transmitted to the parent gear 24,
There is no rotation, and the tape can be pulled out completely freely.

In addition, when winding up the magnetic tape 3 that has been pulled out onto the reel 5, the number of revolutions of the reel 5 required to wind up the entire magnetic tape 3 that has not been pulled out varies depending on the amount of tape on the reel 6. The child gear 25, the gear 28, and the felt 30 make it possible to reliably wind up the magnetic tape 3 without slack, regardless of the amount of tape on the reel 6. In other words, when the amount of tape on reel 5 is the smallest,
In order to completely wind up the magnetic case 3 that has been pulled out, the highest number of rotations is required, but in order to be able to wind up the magnetic case 3 sufficiently, the planetary gear device 21 is
The parent gear 24 and child gear 25 have a tooth number ratio that provides a sufficient number of rotations for the movement of the drive rack 15.
When the amount of tape on the reel 5 is the largest, the reel 5, idler gear 8, and reel gear 7 can no longer rotate when the magnetic tape 3 is wound onto the reel 5, and a torque above a certain level is applied to the gear 28, causing the child gear 25 Since the gear 28 slips on the contact surface with the felt 30, the magnetic tape 30 can be reliably wound regardless of the amount of tape on the reel 5.

Furthermore, as shown in FIG. 1, when the magnetic tape 3 is pulled out by the pick-up side pull-out arm 9 and the XBR-J pull-out arm 11 and is in the tape guide position of the first tape cassette, the guard panel opening/closing rod 19 is pulled out. Cam piece 1
Since the projecting piece 22a of the gear frame 22 is not pressed by the spring 31, the planetary gear device 21 is separated from the reel gear 7 by the spring 31, and the reel gear 7 can rotate freely.

As described above, according to the cassette adapter of the present invention, when storing a magnetic tape, it is possible to reliably wind up the magnetic tape without causing any slack, regardless of the amount of tape on the reel, and when pulling out the tape, the magnetic tape is It can be done smoothly without adding more tension,
Furthermore, the effect is obtained that the tape does not interfere with the running of the tape when it is pulled out to a predetermined tape guide position.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a state in which a magnetic tape is pulled out in a cassette adapter according to an embodiment of the present invention;
The figure is a plan view showing the cassette adapter in a state in which a magnetic tape is accommodated, and FIGS. 3 and 4 are a perspective view and a side view, respectively, showing the main structure of the four-cassette adapter. 1...Second tape cassette, 2...
Half case, 3...a-chieve, 4.5.
...Reel, 6...Body case, 7...
... Reel gear, 8 ... Idler gear, 9
・・・・・・Tick-up side drawer arm, 10.12・
...Guide roller, 11...Supply side drawer arm, 13.14...Connection arm, 15
... Drive rack, 16 ... Pinion gear, 21 ... Planetary gear device, 24 ...
Group gear, 25...Small gear, 27...Ratchet gear, 28...Gear, 3°...
felt. Name of agent: Patent attorney Toshio Nakao and one other person

Claims (1)

[Claims] A main body case that stores a second tape cassette having a shorter reel distance than the first tape cassette and has the same dimensions as the first tape cassette, and a second tape cassette disposed within the main body case. 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 drive means for driving a reel of a second tape cassette housed in a case, and a planetary gear device is fully rotatable and is connected to the reel drive means so that rotation can be transmitted when the magnetic tape is stored. A cassette adapter configured to be supported and disposed on the cassette adapter and to rotate the planetary gear device in conjunction with the tape drawer storage means.