JP2518549Y2 - Rotating head device for auto-reverse type tape recorder - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary head device suitable for being applied to an auto-reverse type tape recorder.

[0002]

2. Description of the Related Art A rotary head device mounted on an auto-reverse type cassette tape recorder rotates a head by 180 ° as the traveling direction of the tape changes so that the magnetic head is turned upside down. It is generally located at the track position.

FIG. 2 shows an example of a conventional rotary head device. The recording / reproducing head 1 and the erasing head 2 are mounted on the front surface of the rotary base 3 so as to face the prescribed track of the tape T. The rotation base 3 has a disc shape, and the front side thereof has a concave circular receiving hole 41 of the front frame 4 which is provided upright along the running direction of the tape T, and the rotation base 3 is allowed to rotate. It is inserted with a gap.

Here, a known means (not shown), such as a V-shaped pedestal for receiving the rotation base 3, is provided on the lower end surface side of the receiving hole 41, and the rotation base 3 is the reference portion. The heads 1 and 2 are positioned at specified track positions in a state of being in contact with.

A rotary shaft 31 is fixed to the rear side of the rotary base 3 with their centers of rotation aligned, and the rear end of the rotary shaft 31 has a bearing hole (not shown) in the rear frame 5 parallel to the front frame 4. ) Is rotatably fitted. A pinion 32 for rotating the rotary base 3 is provided at an intermediate portion of the rotary shaft 31.
Is stuck.

On the left side of the pinion 32, a fan-shaped drive gear 6 rotatably attached to the rear frame 5 by a support shaft 61.
Are meshed. As a result, by rotating the drive gear 6 by a predetermined angle, the rotation base 3 is rotated by 180 °.
The recording / reproducing head 1 and the erasing head 2 can be turned upside down by rotating.

A lever 62 extending downward is provided on the side of the support shaft 61 of the drive gear 6, and the lever 62 horizontally moves along the running direction of the tape T to form an opening 7 in a head switching plate 7.
1 has been inserted.

The head switching plate 7 horizontally moves by a predetermined stroke in a predetermined direction by a separate driving device as the traveling direction of the tape T changes. As a result, the drive gear 6 rotates about the support shaft 61 by a predetermined angle.

A helical spring 51 is interposed between the drive gear 6 and the rear frame 5. This spiral spring 51
Is a reversing spring for holding the rotating state of the drive gear 6. As a result, the drive gear 6 is stably held at the lower limit position or the upper limit position, so that the rotation base 3, and thus the recording / reproducing head 1 and the erasing head 2 are prevented from rotating carelessly due to vibration or the like. ing.

For the rotation of the rotary base 3, as shown in FIG. 3, the hooking portions 33 projecting from the side surface of the rotary base 3 are positioned on the left and right of the rotary base 3 and screwed into the upper frame 8 for positioning. It is regulated by contacting the lower end surface of the screw 81 (only one side is shown in FIG. 2). That is, the left rotation is restricted in FIG. 3A, and the right rotation is restricted in FIG. 3B. As a result, the heads 1 and 2 are held at the prescribed positions. The positioning screw 81 is prevented from rotating by a nut 82 or the like after adjusting the position.

[0011]

By the way, in the example of FIG. 2, the head 1 is held at the rotational position corresponding to the tape running direction immediately before the stop even in the stopped state (see FIGS. 3A and 3B). . Therefore, when the stop state is changed to the play state, for example, when the rotational position of the head 1 in the stopped state is arranged at the rotational position opposite to the rotational position corresponding to the tape running direction, the specified track position and the head 1 are The rotation base 3 must be rotated by 180 degrees in order to correspond to the position of. Therefore, it was not possible to respond promptly, and it took time to start playing.

Therefore, the object of the present invention is to speed up the operation of setting the rotational position of the head to the rotational position corresponding to the tape running direction when the automatic reverse type tape recorder is changed from the stop state to the play state. And

[0013]

According to the present invention, the head is mounted on an auto-reverse type tape recorder, and the position of the head is determined as the tape contact position of the head to the tape according to the tape running direction. A rotary head device that rotates so as to change to a second position is configured such that, when the head is in a stopped state, the head is held at a rotation position that is an intermediate position between the first position and the second position of the tape contacting position. is there.

[0014]

When the play state or the like is changed to the stop state, the head 1 is held at an intermediate position between the first position and the second position of the tape contact position.

When changing from the stop state to the play state, the head 1 is moved to the first position or the second position of the tape contact position.
When the head 1 in the stopped state is held at a rotation position opposite to the rotation position corresponding to the running direction of the tape T (in this case, the head 1 is rotated 180 degrees) because the head 1 is rotated by 90 degrees to the position It is possible to speed up the operation of setting the rotational position of the head 1 to the rotational position corresponding to the tape running direction, as compared with (necessary).

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, FIG. 2 and FIG.
The same reference numerals are given to the portions corresponding to and detailed description thereof will be omitted. Note that FIG. 1 is a front view of the front frame 4 side in FIG. Further, the drive mechanism of the rotation base 3 in FIG. 1 is configured in substantially the same way as the example shown in FIG.

In this example, in the stop state, the head 1 is in the first position (the position shown in FIG. 3A) of the tape contact position.
The head switching plate 7 is positioned so as to be stopped at a rotational position intermediate between the second position (the position shown in FIG. 3B) and the second position. That is, in the stopped state, the erasing head 2 is held upward with respect to the recording / reproducing head 1, and the hooking portion 33 is held downward.

In the play state, as in the conventional case, the head 1
Is arranged so that the head switching plate 7 is positioned in a state where the head switching plate 7 stops at the rotational position corresponding to the tape running direction. The other configurations are the same as those in the example of FIG.

In this example, when the stop state is changed to the play state (recording state), the head 1 is moved to the rotational position corresponding to the tape running direction as the head switching plate 7 moves (see FIG. 3). Therefore, the head 1 reproduces (records) in correspondence with the prescribed track position of the tape T.

When the play state is changed to the stop state, the rotational position of the head 1 is moved to the intermediate position between the first position and the second position of the tape contacting position as the head switching plate 7 moves (the hooking portion 33 is shown in FIG. The position indicated by the solid line in 1)). Then, the head 1 is held at the rotational position corresponding to the traveling direction of the tape T depending on the position state of the head switching plate 7.

Therefore, according to this example, when the stop state is changed to the play state, the head switching plate 7 is moved to move the head 1 to the tape contact position at the first position or the second position.
When the head 1 in the stopped state is held at a rotation position opposite to the rotation corresponding to the tape running direction, since the head 1 is only rotated 90 degrees to the position
In comparison with (which requires rotation by 80 degrees), the operation of setting the rotational position of the head 1 to the rotational position corresponding to the tape running direction can be performed more quickly, and the play start time can be shortened.

In the above-mentioned embodiment, the head switching plate 7 is used to regulate the rotational position of the head 1, but the regulation of the rotational position of the head is not limited to this.

[0023]

According to the present invention, in the stop state, the head is held at the rotational position between the first position and the second position of the tape contact position, and the head is held in the play state. When the heads are moved to the same position, the head only rotates 90 degrees to the first position or the second position of the tape contact position, so the head in the stop state is at a rotation position opposite to the rotation position corresponding to the tape running direction. As compared with the case where the head is held, the operation of setting the rotational position of the head to the rotational position corresponding to the tape running direction can be performed more quickly.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment.

FIG. 2 is a perspective view of a conventional example.

FIG. 3 is a diagram showing a usage state of a conventional example.

[Explanation of symbols]

 1 Recording / playback head 3 Rotating base 33 Hooking portion 81 Positioning screw T tape

Front page continuation (72) Inventor Hiromichi Nishichichi 1-2-11 Ikenohata, Taito-ku, Tokyo Inside Aiwa Co., Ltd. (56) References: 62-85919 (JP, U) 31718 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A tape recorder of an auto-reverse type, wherein the position of the head is changed to a first position and a second position of the tape in a tape contact position of the head with respect to the tape in accordance with a tape running direction. In a rotary head device that rotates in a vertical direction, the head is configured to be held at a rotational position intermediate between a first position and a second position of the tape contact position in a stop state. Rotating head device of type tape recorder.