JPH0535450Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a magnetic head mounting device for a reverse type tape recorder.

(b) Prior art The tape is first run in the right direction for recording or playback, and when the tape is recorded or played back to the end,
There is a reverse type tape recorder in which the running direction of the tape is reversed and the tape runs to the left for recording or playback, so that recording or playback can be performed in both directions.

In such a reverse type tape recorder, the magnetic head contacts different tracks of the tape when the tape is running to the right and when the tape is running to the left, so it is necessary to switch the magnetic head. be. Therefore, magnetic heads are provided corresponding to the left and right tracks, and each time the running direction of the tape is reversed, the magnetic heads are switched to operate one magnetic head and disable the other. Recording or playback can be performed in the direction or left direction.

Furthermore, as described in Japanese Utility Model Application No. 61-16736, a rotating drum is attached to the head body so as to be rotatable by 180 degrees, and a recording/playback head is provided on this rotating drum. By rotating the drum, the height of the recording/playback head can be varied.
The recording/reproducing head is positioned on a track corresponding to the tape running direction.

(c) Problems to be Solved by the Invention As described above, a device in which magnetic heads are provided for each of the left and right tracks and the magnetic heads are switched requires an extra magnetic head and becomes expensive. Since these magnetic heads are inserted through the window of the tape cassette and brought into contact with the tape, they are housed in one case. On the other hand, since the angle of the magnetic head with respect to the tape is different for the left and right tape running directions,
It is necessary to adjust the azimuth depending on the running direction of the left and right tapes. However, as mentioned above, since the magnetic head is housed in one case, the azimuth cannot be adjusted separately for the left and right sides, making it impossible to obtain the best condition.

In addition, in a rotary head in which the recording/playback head is mounted on a rotating drum that can rotate on the head body,
Although there is an advantage that the recording/playback head can be used for both the left and right running directions of the tape, there is still a drawback that the azimuth cannot be adjusted separately for the left and right running directions of the tape.

The present invention provides a magnetic head mounting device for a reverse type tape recorder which eliminates such drawbacks.

(d) Means for Solving the Problems The magnetic head mounting device for a reverse type tape recorder of the present invention includes a head mounting board that is mounted so as to be movable up and down, is provided with a magnetic head, and has locking pieces on the left and right sides, and a tape running board. A switching lever that is rotated by an operating plate that is slidable in different directions and has a locking member that locks on the one locking piece and a locking member that locks on the locking piece, and locking of the head mounting board. It is composed of a pair of upper and lower azimuth adjustment members that engage with each other.

(e) Effect The magnetic head mounting device for the reverse type tape recorder of the present invention has the above-described configuration, and the switching lever is rotated according to the running direction of the tape, and the head mounting board is moved up or down. The magnetic head is switched to a track position corresponding to the direction of tape travel. In addition, the upper azimuth adjustment member regulates the upward movement position of the head mounting board, and the azimuth adjustment in one running direction of the tape is performed, and the lower azimuth adjustment member regulates the downward movement position of the head mounting board. Azimuth adjustment of the tape in a running direction different from that described above can be performed.

(F) Embodiment An embodiment of the magnetic head mounting device for a reverse type tape recorder according to the present invention will be described with reference to the drawings.

In the figure, 1 is a slide base that slides between a recording or playback position and a stop position, and 2 is a supporting member, which is supported from the base 3 to the left and right by sandwiching the base 3 screwed onto the slide base 1 and the central space 4. It consists of protruding support plates 5 and 6, and the support plate 6 on the right side
A shaft 7 protrudes rearward, and the left support plate 5 is formed with threaded cylinders 10 and 11 on which azimuth adjustment screws 8 and 9 are screwed upward and downward, and furthermore, the support plate 5 and
Tape guide 1 with the inner edge of 6 protruding forward
2 and 12 are formed. 14 is a shaft 15 provided from the slide base 1 through the base 3;
A magnetic head 16 is mounted on the head mounting board 15 such that the gap is exposed forward from the central space 4 of the support member 2 , and the azimuth adjustment screw 10 is mounted on the left side.
11, and second and third locking pieces 18 and 19 are formed on the right side to face each other vertically. Reference numeral 20 denotes a switching lever pivotally supported by the shaft 7 of the support member 2 , and the switching lever 20 is connected to the second and third locking pieces 1.
8 and 19, and a locking member 24 having a semicircular shape and having a locking pin 23 are formed. The lock pin 23 is elastically fitted into one of the lock portions 26 and 27 of the lock piece 25 implanted on the slide base 1. Furthermore, the engagement piece 28 that projects downward from the slide base 1 of the switching lever 20 has a slider that slides in the left-right direction in order to bring either the right or left pinch roller (not shown) into pressure contact with the capstan depending on the tape running direction. It is engaged with an actuating plate 29 which is moved.

Next, the operation of the magnetic head mounting device for a tape recorder according to the present invention will be explained.

First, when playing the tape in the right direction and performing reverse playback (recording), the operating plate 29 is slid in the direction of arrow A, and the switching lever 28 is moved clockwise as shown in FIGS. 1 and 3. Since it has been rotated, the head mounting board 14 is lifted upward by the locking pin 21, and the head gap is fixed to the tape 30.
is touched by the upper track. Therefore, the right pinch roller and capstan also perform reverse reproduction of the tape running in the right direction. At this time, the lock pin 23 of the switching lever 20 locks into the lock piece 25.
Since the switching lever 20 is fitted into the lock portion 26 on the lower side of the switching lever 20, the switching lever 20 is held in a clockwise rotated position.

Next, when the tape 30 is run to the end, an end detection device (not shown) operates to reverse the rotational direction of the motor. Then, the actuating plate 29 moves in the direction of arrow B.
The pinch roller on the right side, which had been in pressure contact with the capstan until then, is separated, and instead, the pinch roller on the left side is pressed against the capstan on the left side, causing the tape 30 to run from the right direction to the left direction. On the other hand, when the operating plate 29 slides in the direction of arrow B, the switching lever 20 is rotated counterclockwise as shown in FIG. Press down the mounting board 14. Therefore, the head gap of the magnetic head 16 now comes into contact with the lower track of the tape 30 to perform forward playback (recording). When the switching lever 20 is rotated counterclockwise, the lock pin 23, which had been engaged with the lock portion 26 on the lower side of the lock piece 25, is moved by the ring-shaped elastic material of the lock member 24. Therefore, the lower lock part 26 of the elastic
The switching lever 20 is then pulled out and engaged with the upper lock portion 27 to hold the switching lever 20 in a state where it can be rotated counterclockwise.

When the tape is run in the forward direction and played to the end, the rotation direction of the motor is reversed again, the actuating plate 29 is slid in the direction of arrow A, and the switching lever 20
is rotated clockwise, the locking pin 21 contacts the second locking piece 18 and pushes up the head mounting board 14 again, and the head gap of the magnetic head 16 contacts the upper track of the tape 30 and rotates in the opposite direction. Perform playback.

By the way, as mentioned above, when the head gap of the magnetic head 16 is brought into contact with the track of the tape 30 and information recorded on the tape is reproduced, the head gap needs to be perpendicular to the track. Tape 30 due to the influence of
Because the tape is run at an angle, the head gap may not be perpendicular to the tape track. In such a case, the present invention rotates the azimuth adjustment screws 8 and 9 to adjust the head angle, that is, azimuth adjustment. In the azimuth adjustment, for example, when the tape is running in the right direction and being played in the reverse direction, the upper side of the first locking piece 17 is in contact with the azimuth adjustment screw 10, and the azimuth adjustment screws 8 and 9 are screwed together. 10,1
1, the height of the left side of the head mounting board 14 can be changed by rotating the azimuth adjustment screw 10, so that the angle of the head gap with respect to the tape can be adjusted.

Also, when the tape is traveling to the left and being played back in the forward direction, the first locking piece 17 hits the lower azimuth adjustment screw 9, and the height of the left side of the head mounting board 14 is changed, so that the forward playback is performed. Azimuth adjustment is possible.

(g) Effects of the invention As described above, the magnetic head mounting device for a tape recorder of the present invention is configured to move the head mounting board up and down using a switching lever that is rotated to the right or left depending on the tape running direction. Therefore, the same magnetic head can be used for recording or playback in the forward and reverse directions.

Also, since the height of one side of the head mounting device can be changed separately when traveling in the forward direction and when traveling in the reverse direction,
Azimuth can be adjusted for each running direction.

[Brief explanation of the drawing]

The figures all relate to the tape recorder head mounting device of the present invention. Figure 1 is a rear view showing the reverse direction running state, Figure 2 is a rear view showing the forward direction running state, and Figure 3 is the reverse direction running state. FIG. 4 is a left side view showing the forward running state. Explanation of main figure numbers, 1...Slide base, 8,
9...Azimuth adjustment screw, 14...Head mounting board, 16...Magnetic head, 17, 18, 19...
First, second and third locking pieces, 20...Switching lever, 23...Lock pin, 25...Lock piece, 2
9... Operating plate.

Claims (1)

[Scope of utility model registration request] A magnetic head is mounted to be movable up and down, and has locking pieces on the left and right sides, and a head mounting board that is rotated by an actuating plate that slides in the tape running direction and is locked to one of the locking pieces. a switching lever having a locking member to be locked and a locking member to be locked to the locking piece; and a switching lever provided to engage with a locking piece on a side different from that on which the locking member of the head mounting board is engaged. Consisting of a pair of upper and lower azimuth adjustment members, the upper azimuth adjustment member adjusts the azimuth in one running direction of the tape, and the lower azimuth adjustment member adjusts the azimuth in another running direction of the tape. A magnetic head mounting device for a reverse type tape recorder characterized by: