JPH0227404Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cassette tape recorder.

Conventionally, the signal recorded on one cassette tape is recorded on the other cassette tape to create multiple cassette tapes with the same recorded content, that is, dubbing is often performed.
Instead of preparing two independent tape recorders, it is possible to arrange the first cassette accommodating section on one side of one case and the second cassette accommodating section on the opposite side, and to arrange the cassette accommodating section between the two cassette accommodating sections. By arranging a flywheel in the empty space and forming capstan shafts on both ends of the rotating shaft of the flywheel, one flywheel can be used in common for two capstan shafts, making it possible to handle large parts. For example, a cassette type tape recorder has been proposed in Japanese Unexamined Patent Publication No. 14217/1983, which aims to reduce the size and cost by eliminating a certain flywheel.

However, in this proposed tape recorder, no parts other than the flywheel are shared; in particular, the magnetic heads dedicated to each cassette tape are mounted on independent head bases and moved separately. Therefore, when dubbing as described above, it is difficult to make the pressure contact conditions of both magnetic heads against the magnetic tape the same and to synchronize the movement of the magnetic heads, which poses a problem in dubbing with good quality.

The present invention has been made to solve the above-mentioned conventional problems, and by sharing the head base on which both magnetic heads are attached and the mounting member for attaching the magnetic head to the head base,
It is an object of the present invention to provide a cassette tape recorder which makes it possible to make the pressure contact conditions of both magnetic heads the same and to synchronize their movements.

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

The drawing shows a tape recorder using a compact cassette tape. In the drawing, C and C' are chassis held parallel to each other at a certain distance by a spacer S, and a flywheel is installed between both chassis C and C'. 1 is placed (Figure 4). The flywheel 1 is attached so that its rotating shaft 1a is supported by bearings 2, 2' provided on the chassis C, C', and both ends of the rotating shaft 1a are extended with the same diameter and connected to capstan shafts 3, 3. '.

Pinch rollers 4 and 4' are provided corresponding to the capstan shafts 3 and 3', respectively, and enter through the pinch roller insertion openings 5a and 5a' of the cassette halves of the cassette tapes 5 and 5' and rotate at a constant speed. A cassette tape 5,
By sandwiching the magnetic tapes T and T' within the magnetic tape 5', the magnetic tapes T and T' are made to run at a constant speed. The pinch rollers 4, 4' are rotatably mounted on the chassis C, C' within a predetermined range.
4' is rotatably supported by support frames 6 and 6', each of which is biased by a spring (not shown) in a direction to separate the capstan shafts 3, 3' from the capstan shafts 3, 3'. When the support frames 6, 6' are rotated, they are brought into pressure contact with the capstan shafts 3, 3', respectively.

7 is a head base, and this is its guide groove 7.
a is crimped to the chassis C and slidably fitted into a plurality of guide posts 8 (only one is shown) erected in the direction of the chassis C', so that the chassis C,
They are slidably provided at positions approximately equal distances apart from C', that is, approximately midway between chassis C and C'. A head mounting member 9 having screw holes 9a, 9a' at both ends having a common axis is attached to the head base 7 by being crimped at its intermediate portion. The head mounting member 9 has its head mounting portions 9b and 9b' projecting onto the chassis C and C' through openings Ca and Ca' formed in the chassis C and C', respectively. In 9b',
The magnetic head 10, 10' for recording and playback has screw holes 9a,
It is attached via mounting pieces 10a, 10a' by screws 11, 11' screwed into 9a'.

The head base 7 is applied with a biasing force in the direction opposite to the direction of the arrow by a spring (not shown), and is mounted on the head base 7 by being moved against the biasing force by a means (not shown). The magnetic heads 10, 10 are entered through the head insertion openings 5b, 5b' of the cassette half and brought into contact with the magnetic tapes T, T' at the same time. A magnetic head 12 for erasing (only for the cassette tape 5 is shown) is also attached to the head base 7.

Reference numerals 13 and 13' designate reel shafts, which are rotatably mounted on a shaft 14 that vertically penetrates through an intermediate chassis Cb fixed between chassis C and C', and whose upper end is connected to chassis C and C. protrudes onto the chassis C, C' through the openings Cc, Cc'. The upper ends of the reel shafts 13, 13' are connected to the reel shaft insertion holes 5c, 5 of the cassette tapes 5, 5' mounted at predetermined positions.
Enter the cassette half from c' and reel hub 5.
d and 5d' in the rotational direction. reel shaft 13,
Friction mechanisms 15, 1 are provided at the lower end of 13'.
Attached via 5' are gears 16, 16' for selective meshing with a normally spaced drive gear 17 actuated by means not shown. It's summery.

Although only one of the reel shafts 13 and 13' is shown in the drawings, the other reel shaft has a similar construction.
However, the gears 16, 16' and the drive gear 17 are engaged with one reel shaft on the tape winding side, and the other reel shaft is driven in accordance with the winding of the tape.

Reference numeral 18 denotes a cassette presser spring attached to the chassis so as to be shared by both cassette tapes 5, 5', and is inserted into the reel shaft insertion holes 5c, 5c' drilled in the cassette halves of the cassette tapes 5, 5'. The reel shafts 13, 13' are inserted into the capstan shaft insertion holes 5e, 5e', and the cassette positioning pins 19 are inserted into the positioning pin insertion holes 5f, 5f' (the one for the cassette tape 5' is shown in the figure). (not shown)
are inserted and the cassette tapes 5, 5' are installed in the predetermined positions, the cassette tapes 5, 5'
It acts to maintain the cassette tapes 5, 5' in that state by applying a biasing force to the tapes 5' in the direction of the arrow shown in the figure.

Note that 20 is an operation button, which includes buttons for recording, playback, stop, and synchronized start. In addition, the drive motor and electric circuit are connected to chassis C,
It is accommodated in the empty space between C′.

With the above configuration, when the micro cassette tapes 5, 5' are installed in a predetermined position and the synchronization start operation button 20 is operated so that one side is for recording and the other is for playback, the pinch rollers 4, 5' on each chassis are operated.
4', magnetic heads 10, 10', etc. enter the cassette half through predetermined openings on the front surface of the cassette tapes 5, 5', and the corresponding capstan shafts 3, on which the pinch rollers 5, 5' rotate at a constant speed. , 3' with magnetic tapes T and T' sandwiched between them and run at a constant speed.
Magnetic heads 10 and 10' come into contact with running magnetic tapes T and T', one recording and the other reproducing. As a result, a dubbing operation can be performed by applying a reproduction signal as a recording signal.

Of course, it is also possible to load a cassette tape into only one of the cassette tape accommodating sections for tape recording and playback. At this time, the other mechanism section will also operate at the same time, but there will be no problem.

Incidentally, since the running directions of the magnetic tapes T and T' are the same as shown by the arrows in the figure, the playback of the surface of the cassette tape 5 is performed on the cassette tape 5'.
When you want to record on side A of
The gap positions of the magnetic heads 10, 10 must be upside down.

Furthermore, although the support frames 6 and 6' for the pinch rollers 4 and 4 are separate, this can be changed to a common support frame 6'' for both the pinch rollers 4 and 4' as shown in FIG. As a result, it is possible to further synchronize the start of running of the magnetic tapes T and T' and to reduce the number of parts.

As explained above, according to the present invention, a flywheel is rotatably supported between a pair of chassis,
Capstan shafts are constructed by extending both ends of the rotating shafts, and a cassette tape is sandwiched between each capstan shaft and a corresponding pinch roller to run at a constant speed. A head base is slidably provided approximately in the middle of the chassis, and a magnetic head dedicated to each cassette tape is attached to both sides of the head base via a common member having a common axis. The pressure welding conditions are the same and their movement is synchronized, which not only makes it possible to obtain a good quality dubbing tape, but also makes it easier to locate the magnetic head, reducing the number of parts and reducing the number of parts. This has an excellent effect on cost reduction.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of the main part, Fig. 2 is a plan view showing the cassette tape installed state, Fig. 3 is a sectional view of a part of the main part, and Fig. 4 is a perspective view of the main part.
The figure is a sectional view of another part of the main part, Fig. 5 is a sectional view of another part of the main part, Fig. 6 is a side view of a part of Fig. 2, and Fig. 7 is a part of Fig. 4. FIG. 3 is a side view showing a modification of FIG. C, C'... Chassis, 1... Flywheel,
3, 3'... Capstan shaft, 4, 4'... Pinch roller, 5, 5'... Cassette tape, 7... Head base, 9... Head mounting member, 9a, 9
a'...screw hole, 10,10'...magnetic head.

Claims (1)

[Scope of utility model registration request] A flywheel is rotatably supported between a pair of chassis, both ends of the rotating shaft are extended to form a capstan shaft, and a cassette tape is inserted between each capstan shaft and a corresponding pinch roller. A common member is configured to run the tapes at a constant speed by sandwiching the tapes, and a head base is slidably provided approximately in the middle of the pair of chassis, and a magnetic head dedicated to each cassette tape is mounted on both sides of the head base so that the tapes share a common axis. A cassette-type tape recorder characterized in that it is attached via a cassette-type tape recorder.