JPH0451904B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a helical scan type magnetic recording/reproducing device, and in particular, to an opening in a magnetic tape stored in an attached tape cassette. Regarding the positioning of the part being stretched.

[Background of the invention]

FIG. 4 is a plan view showing an example of a conventional helical scan type magnetic recording and reproducing device, in which 1 is a chassis, 2 is a rotating cylinder, 3 is a tape cassette, 3' is an opening, 4 is a magnetic tape, and 5 is a tape cassette. is the supply side reel, 6 is the take-up side reel, 7 is the input side guide base, 8 is the output side guide base, 9 is the guide guide plate,
10 is a tension arm, 11 is an impedance roller, 12 is a capstan, and 13 is a pinch roller.

In the same figure, in the tape cassette 3,
A magnetic tape 4 is stretched between a supply reel 5 and a take-up reel 6, which are arranged in parallel, and is exposed through an opening 3'. When this tape cassette 3 is installed in a magnetic recording/reproducing device, the inclined guides, guide rollers, pinch rollers 13, etc. provided on the entrance guide base 7 and the exit guide base 8, respectively, move the magnetic field inside the opening 3'. It goes inside more than tape 4.

Therefore, when a recording or playback operation is performed, the entry guide base 7 and the exit guide base 8 move along the guide groove provided on the guide guide plate 9.
At the same time, the magnetic tape 4 is hooked on the inclined guide and guide roller and pulled out from the tape cassette 3. When the entrance guide base 7 and the exit guide base 8 come into contact with a stopper provided near the rotary cylinder 2 to set a predetermined position, the magnetic tape 4 is attached to the rotary cylinder 2 at a predetermined angle. Wrapped in a spiral.

At the same time, the magnetic tape 4 comes into contact with fixed heads such as a tension pin provided on the tension arm 10, an impedance roller 11, and an erasing head, and the pinch roller 13 also comes into contact with the magnetic tape 4.
The capstan 12 and the magnetic tape 4 are held between the capstan 12 and the magnetic tape 4.

When the capstan motor starts and the capstan 12 rotates, the magnetic tape 4 runs from the supply reel 5 to the take-up reel 6, and the two magnetic heads provided on the rotating cylinder 2 move the magnetic tape 4. Scan alternately. While the magnetic tape 4 is running,
Changes in the tension of the magnetic tape 4 are detected by the displacement of the tension pin provided on the tension arm 10, and based on this, the braking means provided on the supply side reel 5 side is adjusted and the magnetic tape 4 is adjusted.
tension is held constant. Also, magnetic tape 4
The minute vibrations in the longitudinal direction of the tape are absorbed by the impedance roller 11.

Incidentally, there is a strong desire for more compact magnetic recording/reproducing devices due to ease of portability and space issues, and efforts have been made to meet this demand. In order to realize this miniaturization, the size and arrangement of each member mounted on the chassis 1 are major issues, and among these, the size and arrangement relationship of the rotating cylinder 2 and tape cassette 3 are important issues. almost determines the
The size of the tape cassette 3 is determined by standards, and the size of the rotating cylinder 2 has its own limits, so it is necessary to miniaturize the magnetic recording and reproducing device based on the arrangement of the tape cassette 3 and the rotating cylinder 2. However, the limit on the arrangement of the rotating cylinder is to place it so close that it does not come into contact with the portion of the magnetic tape stretched across the tape cassette opening 3'.

Moreover, in the tape cassette 3, as is clear from FIG.
Since the rotary cylinder 2 is suspended at the frontmost part on the side of the rotary cylinder 2, the rotary cylinder 2 must be placed somewhat apart from the attached tape cassette 3.

From the above, conventional magnetic recording and reproducing devices
It was difficult to further reduce the size.

[Purpose of the invention]

The purpose of the present invention is to eliminate the drawbacks of the above-mentioned prior art,
An object of the present invention is to provide a more compact magnetic recording/reproducing device in which a part of a rotating cylinder can be stored in an opening of a tape cassette.

[Summary of the Invention] In order to achieve this object, the present invention provides a method that allows the portion of the magnetic tape stretched over the tape cassette opening to be pushed into the back of the opening during the tape cassette mounting process. , is characterized in that a space can be formed into which the rotating cylinder of the opening can enter.

[Embodiments of the invention]

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

FIG. 1 is a plan view showing an embodiment of the magnetic recording/reproducing apparatus according to the present invention, in which 14 ₁ and 14 ₂ are tape positioning members, and parts corresponding to those in FIG. 4 are given the same reference numerals. Part of is omitted.

FIG. 1 shows a state in which a magnetic tape 4 is stored in a tape cassette 3 installed. The entrance guide base 7 has a tape positioning member 14 ₁
However, tape positioning members 14 ₂ are installed on the exit guide base 8, and these tape positioning members 14 ₁ and 14 ₂ allow the portion of the magnetic tape 4 stretched over the opening 3' to be It is pushed deep into the opening 3'. For this purpose, a space is formed in front of the opening 3', and the rotating cylinder 2 is placed on the chassis 1 so that it partially enters this space and does not come into contact with the magnetic tape 4. .

For this reason, the space occupied by the rotating cylinder 2 on the chassis 1 and the space occupied by the tape cassette 3 on the chassis partially overlap, and as a result, the length of the chassis 1 in the vertical direction is shorter than that of conventional magnetic recording/reproducing devices. It can be shortened by

Note that when the magnetic tape 4 is stored in the tape cassette 3, the tape positioning members 14 ₁ ,
14 ₂ pushes the magnetic tape 4 deep into the opening 3', but the entrance guide base 7 and the exit guide base 8 are positioned near the rotating cylinder 2, and the magnetic tape 4 is wound around the rotating cylinder 2. When installed, the tape positioning members 14 ₁ , 14 ₂
is away from the magnetic tape 4.

FIG. 2 shows the tape positioning member 14 ₁ of FIG.
14 ₂ is a perspective view showing a specific example of the tape cassette 3 in relation to the tape cassette 3, in which 14 ₁ ′ and 14 ₂ ′ are the inclined surfaces 15 are the cassette case lid, and 16 is the lid opening member; Corresponding parts are given the same symbols.

In FIG. 2, tape positioning members 14 ₁ and 14 ₂ installed on the entrance guide base 7 and the exit guide base 8 respectively have tape cassettes 3 on their upper parts.
It has inclined surfaces 14 ₁ ′ and 14 ₂ ′ facing. The tape cassette 3 moves in the direction of arrow A during the installation process into the magnetic recording/reproducing apparatus. During this movement, the lid opening member 16 is operated and the cassette case lid 15 is rotated in the direction of arrow B and opened. tape cassette 3
When further moves in the direction of arrow A, the magnetic tape 4
The portion stretched over the opening 3' comes into contact with the tape positioning members 14 ₁ and 14 ₂ and is gradually pushed into the back of the opening 3'.

Next, the function of these tape positioning members 14 ₁ (the tape positioning member 14 ₂ also has the same function) will be explained in more detail with reference to FIG.

When the tape cassette 3 with the cassette case lid 15 opened moves in the direction of arrow A, the magnetic tape 4
comes into contact with the inclined surface 14 ₁ ′ of the tape positioning member 14 ₁ (FIG. 3a), and when the tape cassette 3 further moves in the direction of arrow A, the magnetic tape 4 comes into contact with the inclined surface 1
₄₁ ' and is pushed into the back of the tape cassette 3 (FIG. 3b). Then, when the tape cassette 3 further moves in the direction of arrow A, the magnetic tape 4 moves onto the inclined surface ₁₄ of the tape positioning member 141.
Move to the side connected to ₁ ' and attach the magnetic tape 4 on this side.
The position of is set (Fig. 3c).

In this way, the magnetic tape 4 is pushed deep into the opening of the tape cassette 3, and as a result a space is created in front of this opening, in which the rotating You can set the cylinder position.

In the above embodiment, the tape positioning member is provided on the entry side guide base and the exit side guide base, but the present invention is not limited to this. It can also be a flexible pin. However, as described above, when the tape positioning member is provided on the entry-side guide base and the exit-side guide base, there is no need to provide a special means for moving the tape positioning member. Alternatively, the magnetic tape may be pushed into the back of the opening when the tape cassette starts to be loaded.

〔Effect of the invention〕

As explained above, according to the present invention, by simply adding relatively simple members, the rotating cylinder can be
The rotary cylinder can be arranged so that a part thereof enters the opening of the tape cassette, thereby reducing the sum of the space occupied by the rotary cylinder and the tape cassette, which is different from the prior art. It is possible to provide a magnetic recording and reproducing device that is smaller in size compared to the present invention.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the magnetic recording/reproducing apparatus according to the present invention, FIG. 2 is a perspective view showing a specific example of the tape positioning member shown in FIG. 1, and FIG.
FIG. 4 is a plan view showing an example of a conventional device. 2... Rotating cylinder, 3... Tape cassette,
3'...Opening, 4...Magnetic tape, 7...Inlet guide base, 8...Outlet guide base, 14
₁ , 14 ₂ ... Tape positioning member.

Claims (1)

[Scope of Claims] 1. In a recording and reproducing apparatus in which a part of the head rotation structure enters into the opening of the tape cassette when the tape cassette is completely installed in the apparatus, A recording/reproducing apparatus comprising: a tape moving means for moving the tape in the opening from a pre-stretched position to a position inside the opening that avoids the head rotation structure.