JPS618765A - Cassette holding device of magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce the number of parts to make a device light-weight and low- cost by providing a cassette cover lock releasing member which is brought into contact with a part of a cassette and is driven by the cassette inserting operation. CONSTITUTION:When a cassette 3 is inserted to a holder 17 from the rear part, the rear part is brought into contact with a cassette contacting member 21 to turn this member 21 in the direction of an arrow e', and a lock releasing member 23 is turned around a shaft 23-1 in the direction of an arrow (g) through a transmitting member 22. Then, a claw part 23-2 of the releasing member 23 presses a lock releasing lever 3-2 of the cassette 3 in the direction of an arrow (h) to release the lock of a cassette cover 3-1. Thus, the extent of vertical movement of an aperture part is increased to make it easy to open the cover when the cassette is inserted from the rear part, and the arm connecting the holder and a chassis is made unnecessary to reduce the number of parts, and the constitution is made simple, light-weight, and low-cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a cassette holding device for a magnetic recording and reproducing apparatus for attaching and detaching a cassette containing a magnetic tape.

[Background of the invention]

FIG. 3 is a plan view showing a helical scan type magnetic recording and reproducing device, in which 1 is a chassis, 2 is a rotating cylinder, and 3
is a cassette, 4 is a magnetic tape, 5 is a supply reel, 6 is a take-up reel, 7 is an entry guide pace, 8 is an exit guide base, 9 is a drawer roller, 10 is a drawer guide guide plate, 11 is a tensioner. 12 is an input roller, 13 is a capstan, 14 is a pinch roller, 15 is a capstan motor, and 16 is a loading motor.

In the figure, a supply reel 5 and a take-up reel 6 are arranged in parallel in a cassette 3, and a magnetic tape 4 is attached to these reels.
is wrapped. When the cassette 3 is installed, inside the magnetic tape 4 at the opening of the cassette 3, the inclined guides and guide rollers mounted on the entry guide base 7 and the exit guide pace 8, as well as the pull-out roller 9 are inserted. Sink into it.

Therefore, when recording and reproducing operations are performed, the loading motor 16 rotates, and the entry guide base 7, the exit guide base 8, and the drawer rollers 9 move along the grooves provided in the drawer guide guide plate 10. At the same time, the inclined guides and guide rollers provided on the inlet guide base 7 and the outlet guide base 8 are pulled out, the pull-out roller 9 and the magnetic tape 4 are pulled out from the cassette 3. When the inlet guide base 7 and the outlet guide base 8 are set at predetermined positions near the rotary cylinder 2 on which the magnetic head is mounted, the magnetic tape 4 is attached to the tension pin 11 . It comes into contact with the impedance roller 12 and is wound spirally around the cylinder 2 for one rotation for a predetermined number of times, and is also held between the capstan 1S and the pinch roller 14. Furthermore, although not shown, it also comes into contact with a predetermined fixed magnetic head,
A traveling route for the magnetic tape 40 is formed.

Next, the capstan motor 15 rotates, the capstan 13 rotates, and the magnetic tape 4 runs. While the magnetic tape 40 is running, the tension bin 11 detects the tension of the magnetic tape 4 and controls the braking force applied to the supply reel 5 to keep the tension of the magnetic tape 4 constant. Further, the impedance roller 12 is connected to the magnetic tape 4
It absorbs the longitudinal vibrations of the vehicle and prevents uneven running.

A conventional example of a cassette holding device in such a magnetic recording/reproducing apparatus is shown in FIG. In the figure, 3-1 is a cassette lid, 17 is a cassette holder, 18-1, 18-2 is an arm, 1B-3 is a shaft, 19 is a lid opening member, and the parts corresponding to FIG. The same reference numerals are used to omit the explanation.

FIG. 4-) shows the state immediately after the cassette 3 is inserted into the cassette holder 17, and FIG. 4(B) shows the state in which the cassette and seat 3 are installed. The arms 1F3-1゜18-2 are rotatably attached to the shaft 18-3 in an X-shape, and one end of each is rotatably attached to the chassis 1, and the other end of each is rotatably attached to the cassette holder 17. It is attached to the cassette holder 17 and holds the cassette holder 17. Further, a lid opening member 19 for opening the cassette lid 3-1 is attached to the chassis 1.

Next, the operation of this prior art will be explained.

In order to insert the cassette 6 into the cassette holder 17, push the cassette holder 17 in the direction of the arrow α), the arms 143-1 and 18-2 are folded, and the cassette holder 17 is Go down and attach the cassette 3 to the chassis 1. When the cassette holder 17 is lowered, the cassette lid 3-1 is attached to the opening member 19 installed on the chassis 1.
contact, and the cassette lid 3-1 is opened.

As shown in FIG. 3, in order to store the guides in the opening of the cassette 6, the cassette holder 17 should have a mechanism that can move up and down with respect to the palm 1, as shown in FIG. If necessary, the above conventional example has an arm 19-1, 18-2 for holding the cassette holder as a structure suitable for the operation.
Accordingly, the cassette holder 17 and the chassis 1 are coupled. For this reason, the mechanism is complicated and the number of parts increases.
This was hindering the weight reduction of products.

As a simple structure to solve this problem, the front part of the cassette holder 17 (i.e., the part where the cassette lid 5-1 is located in the body in FIG. 4) is supported by a shaft attached to the chassis 1. , a method of making the cassette holder 17 rotatable with respect to the chassis 1 is conceivable. According to this configuration, the arms 19-1, 18-2, etc. are not required, and the above-mentioned problems are solved, but the following new problems arise.

That is, as in FIG. As shown in Figure 6, guides must be inserted into this opening, but when the cassette is mounted by rotating the cassette holder, the opening is close to the center of rotation of the cassette holder. In addition, the vertical movement distance of this opening is very small, and as a result, it is extremely difficult to insert guides into this opening.

Furthermore, it becomes difficult to open the cassette lid. FIG. 5 is a side view of the cassette 6 viewed from below, and the cassette lid 3-1 is unlocked by moving the release lever 3-2 in the direction of the arrow. The cassette 3 is attached to the cassette holder 17 at the front (i.e., the cassette lid 3-
1 side), the lock release member of the cassette lid 3-1 passes through the groove 3-3 provided in the cassette B,
It comes into contact with the lock release lever 3-2 of the cassette lid 3-1.

In this way, the unlocked cassette lid 3-1 is released by the lid release member 19 (FIG. 4) as the cassette 3 is lowered.
However, as mentioned above, even if the cassette 3 is rotated by the cassette holder, the amount of descent is extremely small, and the cassette lid 3-1 is not opened sufficiently.

For this reason, the conventional cassette holding device has the configuration shown in FIG. 4, which hinders the simplification and weight reduction of the configuration.

[Purpose of the invention]

The object of the present invention is to eliminate the drawbacks of the above-mentioned prior art.

To provide a lightweight and inexpensive cassette holding device for a magnetic recording/reproducing device with a reduced number of parts.

[Summary of the invention]

In order to achieve this object, the present invention makes a cassette holder rotatable with respect to the chassis, inserts a cassette into the cassette holder with the side opposite to the cassette lid first, and during the insertion, Make sure that the cassette device is unlocked.

The present invention is characterized in that the vertical movement distance of the opening of the cassette becomes sufficiently large as the cassette/holder rotates.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an embodiment of a cassette holding device for a magnetic recording/reproducing apparatus according to the present invention, in which 20 is a support shaft, and parts corresponding to those in FIG. 4 are designated by the same reference numerals. Part descriptions are omitted.

In FIG. 1, the cassette holder 17 is rotatably supported on the chassis 1 by a support shaft 20 on the side opposite to the cassette insertion opening.

As shown in FIG. 3A, the cassette 6 is inserted into the cassette holder 17 in the direction of arrow C with the cassette lid 3-1 in front. This cassette 60 cassette holder 17
during insertion into, as described below.

The cassette lid 3-1 is unlocked.

After inserting the cassette 3, as shown in FIG.
side, that is, the opening is separated by light from the support shaft 20, the vertical movement distance of this opening as the cassette -5 rotates in the direction of arrow d is sufficiently large, and therefore, the opening The insertion of guides into the cassette lid 3-1 and the opening of the cassette lid 3-1 are facilitated by the lid opening member 19 coming into contact with the cassette lid 3-1.

FIG. 2 is a front view showing a specific example of the unlocking mechanism for the cassette lid 6-1 in FIG. Portion 522 is a transmission member, 22-1 is a recessed portion, 22-2.22-
3 is a shaft, 22-4 is a hook, 23 is a lock release member,
23-1 is a shaft, 25-2 is a claw portion %24 is a tension spring, 2
5 is a locking member, 25-1 is a shaft, 25-2 is a claw portion, 2
5-3 is a hook, 26 is a tension spring, 27 is a regulating bottle, and parts corresponding to FIGS. 1 and 5 are given the same reference numerals.

In FIG. 2 (, 4), the shaft 21-
1.23-1 is erected, and a cassette abutting member 211 and a lock release member 23 are rotatably attached to each of them. These members are also rotatably attached to shafts 22-2 and 22-5 set on the transmission member 22, so that the rotation of the cassette abutment member 21 is caused by the rotation of the transmission member 22.
It is configured to be transmitted to the lock release member 23 via.

A cassette contact portion 21 is provided at the tip of the cassette contact member 21.
-2 is formed, and a claw portion 23-2 is formed at the tip of the lock release member 26.

The transmission member 22 is provided with a recess 22-1 and a hook 22-4, and a tension spring 24 is hung on the hook 22-4.
2 is biased in the direction of arrow C. ◎For this reason, the cassette abutting member 21 is biased to rotate in the direction of arrow e around the female 21-1. This rotation is restricted by a restriction pin 27.

In this state, the cassette 11 contact portion 21-2 of the cassette M contact member 21 protrudes from the bottom surface of the cassette holder 17 so as to be able to contact the cassette 3 inserted in the direction of arrow C. Moreover, the lock release member 23 is held in such a state that the claw portion 23-2 does not prevent insertion of the cassette 3.

Furthermore, a shaft 25-1 is installed in the cassette holder 17,
A locking member 25 is rotatably attached to this shaft 25-1. For the locking member 25.

A claw portion 25-2 and a hook 25-3 are provided, and the hook 25
A tension spring 26 is attached to -3. This tension spring 26 biases the locking member 25 to rotate in the direction of arrow f about the shaft 25-1, and when the claw portion 25-2 comes into contact with the transmission member 22, the transmission member Movement in the direction of arrow 22 is restricted. When the cassette 3 is inserted into the cassette holder 17 in the direction of arrow C, the cassette contact member 21 contacts the regulation bin 27 until the cassette contact member 210 contacts the set contact portion 21-2. In this state, the claw portion 25-2 of the locking member 25 is in contact with a portion of the transmission member 22 other than the recessed portion 22-1.

The cassette 3 is located on the opposite side of the cassette lid 3-1 (namely 7
The cassette holder 17 is inserted into the cassette holder 17 in the direction of arrow C from the rear part), and the rear part is inserted into the cassette holder 17 from the cassette abutting member 21.
When it comes into contact with the first contact portion 21-2.

As shown in FIG. 4 ψ), the cassette abutting member 21 rotates about the shaft 21-1 in the direction of the arrow e' force. Along with this, the transmission member 22 moves in the direction of the arrow against the biasing force of the tension seal panel 24, and the lock release member 26 moves in the direction of the arrow.
Rotate in the direction of arrow d around -1. Then, the claw portion 23=2 of the lock release member 25 pushes the lock release lever 6-2 of the cassette 6 in the direction of the arrow, and the cassette lid 3-1 is unlocked.

When the cassette lid 3-1 is unlocked, the claw portion 25-2 of the locking member 25 engages the transmission member 22.

The transmission member 22 is fitted into the recess 22-1 and locked. Therefore, the cassette lid 3-1 is kept unlocked.

Then, as explained in FIG. 1, the cassette holder 17
is rotated around the cassette holder support shaft 20't, and the cassette lid 3-1 is brought into contact with the cassette lid opening member 19.
), the cassette 3 is mounted on the chassis while opening the cassette lid 6-1.

〔Effect of the invention〕

As explained above, according to the present invention, the cassette lid can be unlocked during the process of inserting the cassette into the cassette holder from the back, so the cassette lid can be unlocked by rotating the cassette holder relative to the chassis. The vertical movement distance of the opening of the cassette can be made sufficiently wide when mounting the cassette holder, and the arm that conventionally connects the cassette holder and the chassis can be omitted.
The number of parts can be reduced, the configuration can be simplified, the weight can be reduced, and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of a cassette holding device for a magnetic recording/reproducing apparatus according to the present invention, FIG. 2 is a front view showing a specific example of the cassette lid lock release mechanism of FIG. 1, and FIG. FIG. 1 is a plan view showing a conventional example of a helical scan type magnetic recording/reproducing device. FIG. 4 is a side view showing an example of a cassette holding device of a conventional magnetic recording/reproducing apparatus, and FIG. 5 is a bottom view of essential parts of the cassette. 1. Chassis 3. Cassette 6-1.
...Cassette lid 5-2...Lock release lever 17...Cassette holder 19...Lid opening member 2
0...Support shaft 21...Skelet)M connecting member 22...Transmission member 26...Lock release member Patent attorney Akira Takahashi (Takahashi) 7.1 Same (A) ( B) 2nd opening 3rd illustration ten openings (c) bolt (B)

Claims (1)

[Claims] A rotating cylinder equipped with a magnetic head, a cassette containing a magnetic tape wound between two reels, a plurality of tape guide means for pulling out the magnetic tape from the cassette to form a predetermined tape running path, and the cassette being mounted on a chassis. In a magnetic recording/reproducing device equipped with a cassette holder held against the cassette, when the cassette is inserted into the cassette holder, the lid of the cassette comes into contact with a part of the cassette and is driven by the insertion operation of the cassette to lock the lid of the cassette. A cassette holding device for a magnetic recording and reproducing device, characterized in that a cassette lid unlocking member is provided for releasing the cassette lid.