JPS592250A - Tape recorder - Google Patents

Abstract

PURPOSE:To ensure an application of plural cassette halves of different sizes, by constituting a pair of winding hubs so that they can move symmetrically by an equal distance and then connecting immobile intermediate rotors to those winding hubs via transmission mechanisms respectively. CONSTITUTION:Winding hubs 4 and 4' are set previously so that they can fit reels 51 and 51' of a small cassette half as shown by a dotted line at the close side between the hubs and then fit reels 61 and 61' of a large cassette half as shown by a chain line at the distance side respectively. Then the hubs 4 and 4' are installed at the rotary edges of a pair of rotary stages 7 and 7' which are turned around fulcrums P3 and P3' respectively and then turned in the tape winding direction by revolutions of immobile intermediate pulleys 8 and 8' which are set centering on the points P3 and P3'. Thus it is possible to use the cassette halves 5 and 6 of different sizes. Furthermore the moving hubs 4 and 4' can be driven without moving a driver system by driving the immobile pulleys 8 and 8'.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder that can use a plurality of cassette halves of different sizes.

In conventional half-cassette tape recorders, the size of the cassette half to be used is determined, so if the recording time is long, it is necessary to stop recording midway, but if the recording time is short, it is not necessary. The disadvantage is that the amount of tape used is large, making it uneconomical.

The present invention aims to provide a tape recorder that can overcome these drawbacks.

The tape recorder of the present invention will be explained below with reference to the accompanying drawings. Fig. 1 is a schematic plan view of the tape recorder of the present invention, which includes a magnetic head section 1 including a recording and reproducing head [a], an erasing head [b], etc. A tape transport mechanism 2 consisting of a pinch roller 2a and a capstan 2b is disposed on the front side, and a pair of winding hubs 4 and 4' are mounted on the cassette half mounting surface 3. , 4' are arranged in symmetrical positions with respect to the center line.

The winding hubs 4, 4' are configured to be able to move the same distance symmetrically with respect to the center line, and when moving in a direction approaching the center line, they simultaneously move toward the hunting head l. When moving in the direction approaching the center line, or moving away from the center line, the foundation air head 1 force 1 is applied at the same time.
They are also set to move in the direction of moving away from each other.

The movement trajectories s, s' of the winding hubs 4, 4' are arranged so that the reel 51.5' of the small cassette half 5 as shown by the dotted line in FIG. Large cassette half-stone reel 61 as shown by the chain line in the figure
．． The setting is such that 61'% mating is possible, and the second
As shown in the figure, the closest position P1. From P1' to the R remote side position p2, l) 2 /, the trajectory s, s'
is the base point P3. which is located symmetrically with respect to the above center line. P3'
It is determined that it lies on an arc centered on the center.

[Above] The pair of winding hubs 4, 4' are connected to the above base point P3, as shown in FIG. An example of an intermediate rotor is installed at the rotating ends of a pair of rotating pedestals 7 and 7' that rotate about Ps' as a fulcrum, and whose position does not move about the base points P3 and P5' as axes. It is connected to the intermediate pulley IJ-8, 8' by a belt 9.9', and is configured to be rotated in the tape winding direction by rotation of the intermediate pulley 8.8' in the direction of the arrow.

A reversible drive motor 10 that selectively rotates these pulleys is disposed between the intermediate boops IJ-8 and 8', and an idler 11- that allows the rotating shaft 10a of this drive motor 10 to rotate freely. The above intermediate boo IJ-s through p,
s' alternately.

The free idler 11 is driven by the rotation of the rotating shaft jOa, moves in the rotational direction of the rotation 9108, presses against an intermediate pulley in the moving direction, and rotates the intermediate pulley.

A transmission belt 9° 9' as in the embodiment is interposed between the intermediate boos IJ-8, 8' and the winding hubs 4, 4'. is alternatively rotated in the winding direction.

A brake mechanism 12 is provided oppositely to the intermediate boos IJ-8, 8' if desired, and this brake mechanism 12 applies a braking force to the intermediate boos IJ-8, 8', and this braking force causes the tape to run. At the end, the winding hubs 4, 4' are stopped.

The configuration shown in the embodiment as [brake mechanism] 2 is an arm 12b provided with brake shoes 12a, 12a' at both ends.
Although the brake mechanism 12 is attached to and detached from the rain intermediate pulley at the same time and a braking force is applied to the intermediate pulley when the brake mechanism 12 is pressed into contact with the intermediate pulley, a brake mechanism having another configuration may be used instead of such a brake mechanism 12.

In the above, it is preferable that the winding hubs 4, 4' be installed on the rotating pedestals 7, 7' as in the embodiment, but in some cases, the rotating pedestals 7, 7' may not be used. For example, as shown in FIG. 4, the winding hub 4 is movably supported by guide frames 13 and 33' formed along the loci s and s'. , 4′ and intermediate boo IJ
-8, 8' may be connected by transmission belts 9, 9'.

In the above, the transmission mechanism may use gear trains 14 and 14' as shown in FIG. At the same time, this geared rotor 1
5.15' rotates the gear train 14.14', thereby rotating the winding hub 4.4' in the winding direction.

In this embodiment, the gear train i4. Gears 14b and 14b' of the winding hubs 4 and 4' are meshed with movable or immovable large-diameter gears 14a and 14a'.
, 4' is a large diameter gear] 4a.

By making a planetary motion in the direction of the arrow on the outer periphery of 14a', the distance between the winding hubs 4, 4' and the winding hubs 4, 4'
The structure is such that the distance between the magnetic head portion l and the magnetic head portion l can be changed.

Since the tape recorder of the present invention is as described above, it has the advantage of being able to use cassette halves 5 and 6 of different sizes by shifting the positions of the winding hubs 4 and 4'. The middle of positional immobility.

By driving boo 'J-8, 8', the winding hub 4゜4
Since it is configured to rotate the winding hub 4°4', it is possible to drive the shifting winding hub 4°4' without moving the drive system consisting of the drive motor 0, intermediate rotor, transmission mechanism, etc. There is.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of the tape recorder of the present invention, Fig. 2 is an explanatory diagram illustrating the movement of the winding hub used in the tape recorder, and Fig. 3 is a diagram of the winding hub drive system used in the cheap recorder. 4 and 5 are schematic plan views showing other embodiments of the above drive system, respectively. In the figure, 1 is a magnetic head section, 2 is a tape transport mechanism, 3 is a cassette half mounting surface, 4.4' is a winding hub, 5.6 is a cassette half, 8 and 8' are intermediate pulleys as intermediate rotors. 9, 9' and 34, 14' are transmission mechanisms, 9.9' is a transmission belt, 14.14' is a gear train, 10 is a drive motor, 15.15' is a geared rotor as an intermediate rotor,
L is the center line, p3. iJ3/ indicates the base point, and S and S' indicate the movement trajectory. Patent Applicant Takeuchi Sangyo Co., Ltd. Wellwood Co., Ltd. Agent Seiji Matsuda - Spontaneous Procedural Amendment August 15, 1980 Commissioner of the Japan Patent Office Kazuo Wakasugi 1, Indication of Case 1982 Patent Claim 92,051 No. 2, Title of the invention Cheap recorder 3, Relationship with the case of the person making the amendments Applicant 8, Contents of the amendments The drawings of the present application are corrected as shown in the attached drawings, Figure 3. Figure 3

Claims (1)

[Claims] For a cassette half, one winding hub is provided on each side of the cassette half mounting surface with respect to the center line of the surface, and a magnetic head section and a tape transport mechanism are arranged on the front side of the winding hub. In the tape recorder, the winding hub is configured to be able to move the same distance symmetrically with respect to the center line, and each of the winding hubs is connected to an unmovable intermediate rotor through a transmission mechanism, respectively. The pair of intermediate rotors are located at symmetrical positions with respect to the center line, and are installed with their axes centered on a pair of base points located on the opposite side of the magnetic head section via the winding hub. The pair of intermediate rotors is provided with a drive motor that selectively drives these rotors to rotate the selected one of the winding hubs in the tape winding direction, and by moving the winding hub, the winding hub This tape recorder is characterized by being configured so that the distance between them corresponds to cassette halves of different sizes.