JPS6292290A - Cassette adaptor - Google Patents

Abstract

PURPOSE:To prevent the occurrence of a damage on a magnetic tape by providing a lock opening/closing means that controls a locking member in a miniature cassette and operating the lock opening/closing means with a pulling member provided within a cassette adaptor. CONSTITUTION:Each of pulling members 20 and 21 turns while centering respective supporting shaft and pulls out a magnetic tape 4 to a tape path A that is actually equivalent to a reference type cassette. A pressing member 20a is provided at one end of the pulling member 20. Before the magnetic tape 4 is pulled out with the pulling member 20, the pressing member 20a is not abutted on the pushing part 16a of a releasing arm 16, and a locking member 6 in a miniature cassette 1 is released, and a take-up reel 3 is revolved freely. After the magnetic tape 4 is pulled out, the pressing part 20a presses the pushing part 16a of the releasing arm 16 and the locking member 6 is engaged with the irregular part 3a of the take-up reel 3, thereby preventing the revolution of the take-up reel 3. Therefore, so that the take-up reel 3 is not revolved after the magnetic tape 4 is pulled out, the damage due to the loosening of the magnetic tape 4 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cassette adapter that is effective for use in a signal recording or reproducing device (hereinafter referred to as a magnetic tape device) such as an audio tape recorder or a video tape recorder. In particular, a small cassette whose magnetic tape travel path is different from that of a standard cassette can be applied to a magnetic tape device for standard cassettes.

Conventional technology In recent years, magnetic tape devices have been getting smaller and smaller, but in an effort to make them even smaller, we have developed a small cassette that is smaller than a standard cassette and can maintain compatibility with standard cassettes using a cassette adapter. has been commercialized. In video tape recorders, for example, there is a cassette adapter as disclosed in Japanese Patent Laid-Open No. 59-24481. There are conventional small cassettes and cassette adapters. An example of a conventional small cassette and cassette adapter is shown in FIGS. 5 and 6.

A supply reel 2 and a take-up reel 3 are built into the small cassette 1 with a magnetic tape 4 wound thereon.A gear-shaped uneven portion 3a is formed on the flange portion of the zero-take reel 3. . On the other hand, a locking member 6 is provided so that the convex portion 6a thereof is engaged with the concave and convex portion 3a of the winding rule 3.

The locking member 6 is movable up and down along the guide post 7, and is normally urged downward by a biasing spring 8 so that the convex portion 6a of the locking member 6 engages with the concave and convex portion 3a of the winding rule 3. Therefore, rotation of the take-up reel 3 is prevented.

When this small cassette l is attached to the cassette adapter 10, the lock release pin 9 releases the lock member 6 from the biasing spring 8.
Because it is pushed upward against the force of
The take-up member 11 rotates freely when the take-up member 3 rotates freely.
．． 12 pulls out the magnetic tape 4 and inserts a standard cassette tape (
(not shown).

At this time, rotation of the supply reel 2 is prevented by known means (not shown).

Problems to be Solved by the Invention However, with such a structure, the take-up reel 3 of the small cassette 1 is free to rotate even after the magnetic tape 4 is pulled out, so disturbances such as vibration may cause the magnetic tape 4 to rotate. If the take-up reel 3 becomes slack, hits a loading member (not shown), etc. when it is attached to a magnetic tape device (not shown), or is subjected to some kind of impact, the tape tension will decrease as the take-up reel 3 attempts to rotate due to inertia. This poses a serious problem in that the magnetic tape 4 may be damaged due to abnormal rise in the magnetic tape.

Therefore, the present invention allows the take-up reel 3 to rotate freely before pulling out the magnetic tape 4, and prevents the rotation of the take-up reel 3 after the magnetic tape 4 has been pulled out, so that the magnetic tape 4 does not become slack or abnormal. Make sure that no excessive tape tension is applied.
Another object of the present invention is to provide a cassette adapter that operates so that the lock member 6 of the small cassette 1 is released by the lock release means provided in a standard cassette magnetic tape device.

Means for Solving the Problems The technical means of the present invention for solving the above-mentioned problems is to provide a lock opening/closing means for controlling the locking member of the small cassette in the cassette adapter, and a drawer member provided in the cassette adapter. so that the lock opening/closing means operates,
In addition, a lock interlocking means is provided, and the locking of the small cassette is made possible by the lock release means provided on the magnetic tape device.
It was designed to be canceled.

According to the above-described structure, the lock opening/closing means releases the locking action of the locking member and the reel is free to rotate before the pulling member pulls out the magnetic tape, and after the pulling member finishes pulling out the magnetic tape. Since the lock opening/closing means works so that the lock member prevents the rotation of the reel, the rotation of the reel is prevented, and it is possible to prevent the magnetic tape from loosening or applying abnormal tape tension. Further, when the adapter is inserted into the magnetic tape device, the lock interlocking member unlocks the small cassette by the action of the lock release means provided in the magnetic tape device, so that the tape can be pulled out.

Embodiment Hereinafter, the structure and operation of an embodiment of the present invention will be explained using FIGS. 1 to 4.

1, 2, 3, and 4, the release post 14, which is movable up and down in the hole 13a of the holding member 13, is biased in the direction of arrow B by a compression spring 15. . Furthermore, the flat portion 16a of the release arm 16 enters through the notch 13b of the holding member 13 and comes into contact with one end of the release post 14. On the other hand, the release arm 16
It is rotatable around , and has a contact portion 16b against which a portion of a drawer member to be described later comes into contact. Further, the release arm 16 is subjected to a moment in the direction of the arrow by the temporary spring 18 around the support shaft 17. A stopper 19 is provided to restrict rotation of the release arm 16. Holding member 13, release post 14, compression spring 15, release arm 16
, the support shaft 17, the leaf spring 18, and the stopper 19 constitute a lock opening/closing means. The pull-out members 20.21 each pivot about support shafts 22.23 and pull out the magnetic tape 4 to a tape path A that is substantially equal to a standard cassette (not shown). A pressing portion 20a is provided at one end of the drawer member 20.
is provided, and before the pull-out member 20 pulls out the magnetic tape 4, this pressing portion 20a is pressed against the contact portion 16 of the release arm 16.
b, but after the magnetic tape 4 is pulled out, it comes into contact with the contact portion 16b of the release arm 16. Further, the lock interlocking member 24 is rotatable around a support shaft 27, and one end 24a thereof can come into contact with one end of the release post 14. The lock interlocking member 24 receives a moment in the direction of arrow E from the biasing spring 25. The rest is the same as the conventional example, so the explanation will be omitted.

Next, the opening/closing operation of the reel lock, which is a feature of the present invention, will be explained. When the small cassette 1 is inserted into the cassette adapter 5, the reel is locked in the second
The result will be as shown in the figure. That is, the release post 14 is
Although the compression spring 15 receives a force in the direction of arrow B, the leaf spring 18 also receives a larger force in the direction of arrow C via the release arm 16. The force tends to push you up. For this reason, the convex portion 6a of the lock member 6 and the concave and convex portion 3 of the take-up reel 3
The connection with a is removed, and the take-up reel 3 is free to rotate. In this state, when the pull-out members 20 and 21 are rotated by known means, the magnetic tape 4 is pulled out and the standard cassette (
(not shown).

When the pull-out member 20 is close to completing pulling out the magnetic tape 4, the pressing portion 20a of the pull-out member 20 presses against the portion 1 of the release arm 16.
6b, rotate the release arm 16 around the support shaft 17, and after completing the drawer, release the release post 14 as shown in Fig. 3.
, and the locking member 6 is moving downward. That is, the release post 14 is moved downward by the force of the compression spring 15 because the force in the direction of arrow C due to the temporary spring 18 is removed. Then, the locking member 6 of the small cassette 1 is pressed downward by the biasing spring 8, and the convex portion 6a and the take-up reel 3
The uneven portions 3a of the winding reel 3 engage with each other, and the rotation of the take-up reel 3 is prevented. Therefore, even if vibration or impact is applied to the cassette adapter 5 after the magnetic tape 4 is pulled out, the take-up reel 3 will not rotate, so the magnetic tape 4 will not slack or abnormal tape tension will be applied. Next, the third
When the cassette adapter 5 in the state shown in the figure is inserted into a standard magnetic tape device (not shown), the lock release means 26 provided in the standard magnetic tape device is released from the lock interlocking member 24.
is rotated around the support shaft 27. When the lock interlocking member 24 rotates, one end 24a thereof comes into contact with one end of the release post 14 and pushes the release post 14 upward in the direction of arrow C.

As a result, the convex portion 6a of the locking member 6 is no longer engaged with the concavo-convex portion 3a of the take-up rule 3, and the take-up rule 3 is free to rotate.

Therefore, a tape pull-out means (not shown) provided in a standard magnetic tape device (not shown) can easily pull out the magnetic tape. In the present invention, although the description of the locking member of the supply reel is omitted, it is always locked by a known means, and is unlocked when the cassette adapter is inserted into the magnetic tape device.

Further, in the present invention, the lock opening/closing means and the lock interlocking member are provided on the take-up reel side, but they may be provided on the supply reel side, or may be provided on both the take-up reel winding side and the supply side. Needless to say, it's a good thing.

Effects of the Invention In the present invention, the cassette adapter is provided with a lock opening/closing means that operates in conjunction with the movement of the drawer member, so when a small cassette is inserted into the cassette adapter, the reel is unlocked by the lock opening/closing means. The reel can rotate freely and the magnetic tape can be pulled out. Further, when the pull-out member completes pulling out the magnetic tape, the lock opening/closing means operates, and the rotation of the reel is prevented by the lock member. For this reason, even if the cassette adapter is subjected to vibration or shock, the reel will not rotate, so the magnetic tape will not become sagging or abnormal tape tension will be applied, and the magnetic tape can be completely protected. It is.

Further, since the lock interlocking member is provided, the compact cassette can be unlocked by the lock release means of the magnetic tape device, and the tape can be pulled out without the need for a separate release means.

[Brief explanation of drawings]

FIG. 1 is a plan view of the main part of a cassette adapter according to an embodiment of the present invention, FIG. 2 is a side view of the main part before the cassette adapter shown in FIG. 1 pulls out the magnetic tape, and FIG. Figure 4 is a side view of the main part after the cassette adapter in Figure 1 has pulled out the magnetic tape, Figure 4 is a side view of the main part when the cassette adapter in Figure 1 is inserted into the magnetic tape device, and Figure 5 is the conventional cassette. FIG. 6, which is a plan view of the main part of the adapter, is a side view of the main part of a conventional cassette adapter. ■...Small cassette, 2...Supply reel, 3...I reel, 4...Magnetic tape, 6...Lock member , 8... Biasing spring, 13... Holding member, 14... Release post, 15 Old... Compression spring, 16... Solution 17
-4.17...Temporary spring, 19.Old...S)7 bar, 20.21...Drawer member, 24...
- Lock interlocking member, 26...Lock release means. Name of agent: Patent attorney Toshio Nakao 1 person 3-m-Take-up reel 6- Lock member I3- Holding member 16--Release arm 24- Lock difference V: tS goods Figure 1 13- Hoso $f Ikuzai /4-1 release post TS-1 compression spring/6-# release arm 24-m-mouth/tsuku i moving member 2nd figure 13-1 holding material 14- release post 15-1 compression spring 16- release arm 24- Locking member Fig. 3 I3- Holding member I4- Release post I5- Compression spring 24- Locking member 26- Locking member Fig. 4/-m-Small cassette 2- Supply reel 3- Winding Reel 6- Lock member? -Lock release pin Figure 5! -71\ type cassette 3- Take-up reel 4- Magnetic tape 6- Opening and hook member

Claims (1)

[Claims] a magnetic tape smaller than a first cassette and having a predetermined size and a predetermined shape containing a magnetic tape and similar to the first cassette; a pair of reels for winding the magnetic tape; and a pair of reels for winding the magnetic tape. a second cassette having a locking member that prevents rotation of at least one of the reels;
A cassette adapter used when attached to the first cassette recording and reproducing device, the drawer member for pulling out the magnetic tape of the second cassette to a tape path substantially equal to that of the first cassette; Before the member pulls out the magnetic tape, the locking operation of the locking member is released so that the reel can rotate freely, and after the drawing member completes drawing out the magnetic tape, the locking member locks the reel. A lock opening/closing means that operates to prevent rotation, and a lock interlocking member that operates to release the locking operation of the lock member by a lock release means provided in the first cassette recording and reproducing device. Characteristic cassette adapter.