JPS6323779Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a demagnetizer that facilitates the cleaning and degaussing of recording and reproducing heads, particularly in microcassette recorders and the like.

When a cassette tape deck or a regular tape recorder is repeatedly used for long periods of recording and playback, the tape contact surface of the recording and playback head becomes contaminated with magnetic powder, binder, etc., reducing the tape's adhesion and running properties. , tends to deteriorate recording and playback characteristics. At the same time, residual magnetism is generated in the head, which also deteriorates the head characteristics.

In recent years, as audio equipment has become more sophisticated, devices equipped with a cleaning mechanism that rubs and cleans the surface of the head in a cassette case-like case are being provided to prevent head contamination. For this purpose, a cassette-shaped demagnetizer is provided which is equipped with a demagnetizing mechanism that gradually demagnetizes the head while coming into contact with the head.

However, if you want to record or play properly, you should first use a cleaning mechanism and a degaussing mechanism to correct the head condition to normal, but conventionally the two have been separated. The cassette shape is difficult to handle because it is a large body, and even though it is shaped like a cassette for portability and storage, it requires extra space, which is not desirable.

The present invention was developed from this point of view, and is intended for the maintenance of microcassette tape recorders, which have become particularly popular in recent years. and an opening for engaging and disengaging the pinch roller provided in the center of the front of the case, and symmetrically offset toward one end and the other end with respect to the opening for engaging and disengaging the pinch roller on the front of the case, The device has an opening for engaging and disengaging the head arranged so that the head on the device side corresponds to either side when the case is placed on the device such as a recorder on the front or the back,
A demagnetizing means for demagnetizing the head and a cleaning means for cleaning the head are built into the case, and the demagnetizing means faces the opening for engaging and disengaging one head, and the cleaning means faces the opening for connecting and disengaging the head from the other. By facing the opening for engaging and disengaging the head, a cleaning means and a demagnetizing means can be provided in one case, and the portability and storage characteristics peculiar to the microcassette can be exhibited.

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

In FIG. 1, 1 is an upper case, and 2 is a lower case, which are connected by screws 3 and have the same shape as the microcassette case. Five openings 4, 5, 6, 7, and 8 are formed on the front surfaces of the cases 1 and 2. Specifically, there is a central opening 6 formed in the center of the front surfaces of the cases 1 and 2, into which a pinch roller for a device used such as a recorder is engaged and detached, and a central opening 6 formed in the center of the front surface of the cases 1 and 2, and a center opening 6 formed at one end and the other end of the cases 1 and 2, respectively. installed offset,
Left and right deflection openings 5 and 7 for engaging and disengaging the head, which are located symmetrically with respect to the central opening 6, and the head of the device in use corresponds to one of them when the head of the device in use is mounted upside down; It consists of left and right outer end openings 4 and 8 formed at the outermost ends of the cases 1 and 2.

In addition, the upper and lower cases 1 and 2 are formed with through holes 9 and 10 through which the winding hub of the recorder (not shown) is inserted. At the same time, a cleaning tape 12 serving as a cleaning means is wound around this reel 11. The cleaning tape 12 is on the reel 11
from, across the central opening 6, right-deviating opening 7,
It is wound so as to return to the reel 11 through the right outer end opening 8. 13, 14, 15, and 16 are rollers for winding the cleaning tape. In particular, roller 16 is a roller for adjusting the tape tension, and the spring 1 is always moved forward so that it can move back and forth according to the tension.
8.

Reference numeral 19 denotes a pressing pad disposed corresponding to the rightward deflection opening 7.

A demagnetizing head 20 as a demagnetizing means is attached to the left deflection opening 5 so as to be movable forward and backward by a guide wall 21, and the rear end of the demagnetizing head 20 is moved forward by a push spring 22 which also serves as a power switch. Being pressed.

To this degaussing head 20, an alternating current (I) which attenuates in accordance with the time change (t) as shown in FIG. 2 is applied. Supplied.

That is, the power supply battery 23 housed in the case
A booster circuit 24 is connected to one end of the battery via a press spring 22, and a capacitor 25 is connected to this output terminal for charging. When the charging voltage reaches a predetermined value preset by the detection resistors 26 and 27, the switching element 28 becomes conductive and the demagnetizing head 20 is driven by the alternating current generating circuit 29. Further, at the same time that the capacitor 25 reaches the above-mentioned predetermined value, the booster circuit control element 30 becomes conductive and the booster circuit 24 is cut off, so the capacitor 25 is not charged but continues to be discharged to the alternating current generating circuit 29, and the terminal voltage increases. descend,
This produces an alternating current that decays.

How to use the demagnetizer constructed as above will be explained using the schematic diagrams in Figures 4, 5, and 6. First, if it is not attached to a recorder, etc.,
As shown in the figure, since the tape tension adjustment roller 16 is moved forward by the spring 18, the cleaning tape 12 is stretched in a straight line.

As shown in FIG. 5, when the recording/playback head 31 is inserted into the rightward deflection opening by operating the recorder, the cleaning tape 12 is positioned between the capstan 32 and the pinch roller 33, and is fed out at a predetermined speed. At the same time, since the reel 11 is rotated in the direction of arrow A, the surface of the head 31 is cleaned by the cleaning tape 12. In this case, the cleaning tape 12 is applied with an appropriate pressing force by the pressing pad 19, and the tape tension adjustment roller 16 of the cleaning tape 12 is moved back in the direction of the broken line arrow B to prevent the cleaning tape 12 from sagging. .

In this way, the surface of the head 31 is cleaned by the cleaning means mainly composed of the cleaning tape 12.

Next, if you want to demagnetize the head 31, just turn the case upside down and load it. When the head 31 of the recorder is pushed out, the head 31 comes into contact with the degaussing head 20 and retreats, which also functions as a power switch. The push spring 22 is closed, the electric circuit shown in FIG.
In this way, the residual magnetism of the head 31 is erased.

In this way, in the present invention, in the same case,
By providing the head cleaning means and the demagnetizing means in symmetrical positions, when in use, the head can be selectively demagnetized or cleaned by simply turning the head upside down.
Of course, by turning the case upside down and cleaning it after the degaussing operation, both cleaning and degaussing operations can be easily performed on the head, and both can be rationally arranged in the same case. Therefore, the portability of the microcassette can be further improved.

In the above embodiment, a plurality of openings are provided, but in order to clarify the relative positional relationship between the cleaning means and the degaussing means, they are divided into a plurality of openings, and one continuous opening or a cleaning The degaussing means may be divided into a plurality of pieces while maintaining the above-mentioned positional relationship between the degaussing means and the degaussing means.

Furthermore, although the degaussing means is electronically controlled, it may also be one that uses the rotational force of the reel 11 to rotate a permanent magnet and generate an alternating magnetic flux.
The cleaning means is not limited to the cleaning tape 12, but may also be one that moves felt pads in reciprocating motion.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention, FIG. 2 is a signal waveform diagram applied to the degaussing means of the embodiment,
Figure 3 is a circuit diagram of the degaussing means of the same embodiment;
5 and 6 are schematic diagrams for explaining the usage state of the same embodiment, with FIG. 5 showing the state during cleaning and FIG. 6 showing the state during demagnetization. 1, 2... Case, 5, 7... Opening for engaging and disengaging the head, 6... Opening for engaging and disengaging the pinch roller, 12...
...Cleaning means, 20...Demagnetizing means.

Claims (1)

[Scope of utility model registration request] Cases 1 and 2 formed to have approximately the same size and shape as the case of the microcassette, and an opening 6 for engaging and disengaging the pinch roller provided in the center of the front surface of the cases 1 and 2.
and a front panel which is symmetrically offset toward one end and the other end with respect to the pinch roller engagement/disengagement opening 6 on the front surface of the cases 1 and 2, and which is used for equipment such as a recorder in the cases 1 and 2; In either mounting state, the head on the equipment side has openings 5 and 7 for engaging and disengaging the head arranged so as to correspond to either of them, and the head is demagnetized in the cases 1 and 2. The degaussing means 20 includes a built-in degaussing means 20 for cleaning the head, and a cleaning means 12 for cleaning the head.
A demagnetizer characterized in that the cleaning means 12 faces the opening 5 for engaging and disengaging one head, and the cleaning means 12 faces the opening 7 for engaging and disengaging the other head.