JPH0447761Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tape winding device, and is capable of erasing signals recorded on the tape using a cassette type degaussing device while winding up the tape wound inside the cassette case. This is what I did.

A tape winding device for magnetic tape or other tape wound inside a cassette case has the cassette case attached to its main body, and a motor rotates a tape winding shaft to wind the tape. , this kind of conventional winding device generally only winds up the tape.

Furthermore, as a device for easily magnetizing the magnetic head of a recording/reproducing device, a cassette-type demagnetizing device is known, which has a demagnetizing head and a demagnetizing circuit built into a cassette case. This type of degaussing device is set in the cassette mounting part of the deck and operated by the play button to bring the magnetic head on the deck side into contact with the degaussing head inside the cassette case, and the magnetic head is demagnetized by the alternating gradually decreasing magnetic field generated in the degaussing head. It demagnetizes the By combining such a tape winding device and a cassette-type degaussing device, the present invention can simultaneously wind up a tape wound and stored in a cassette case and erase signals recorded on the tape. This tape winding device was developed with the aim of providing a tape winding device that has a main body portion provided with a rotating shaft for winding the tape wound inside the cassette case, and a degaussing head mounted on the front surface of the cassette case. A cassette-type demagnetizer mounting part is provided, the cassette case and the cassette-type demagnetizer being retractably disposed from the main body part, and the cassette case and the cassette-type demagnetizer are placed in close proximity to each other with their respective magnetic head insertion openings facing each other. In addition to being able to be freely attached to the mounting section, the protrusion/retraction operator of the degaussing head is linked to the switch button of the rotary shaft drive motor. By attaching a cassette case and a cassette-type degaussing device and operating the switch button, while winding the tape wound inside the cassette case, the alternating magnetic field generated in the degaussing head causes the recording on the tape to be removed. This allows the signal to be erased. Embodiments of the present invention will be described below with reference to the drawings.

1 and 2, reference numeral 1 denotes a tape winding device according to the present invention, and a box-shaped main body 2 has a pair of motors rotated by a motor (described later) built in the main body 2 on the upper surface thereof. Rotating shafts 3, 3 for tape winding are rotatably arranged upright. Reference numeral 4 denotes a cover body whose rear end is rotatably pivoted to the rear of the main body 2 and is openable and closable, and a sliding switch button 5 is provided on the top surface of the cover body 4. The button 5 is in the OFF position (motor stop position), LO position (motor low speed rotation position), and HI position.
position (motor high speed rotation position). Reference numeral 46 denotes a variable contact that is interlocked with the switch button 5 and is disposed on the inner surface of the cover body 4. 47 is a contact plate thereof, 48 and 49 are terminal plates corresponding to the above-mentioned LO position and HI position, respectively, and each plate 47 to 49 is connected to the main body 2 side through a connection cord 50 attached to the inner surface of the cover body 4. Connected to an electrical circuit (described below). Numerals 51 and 51 are projecting pieces provided on the bottom surface of the button 5. Note that details of the button 5 will be described later.

Reference numeral 6 denotes a Phillips-type compact cassette case, in which a magnetic tape 7 is wound and stored. Reference numeral 8 designates a magnetic head insertion port provided on the front surface of the case 6, and reference numerals 9 and 9 designate rotating shaft insertion ports. It is removably attached to the top surface. Reference numeral 10 denotes a viewing window provided at the center of the cover body 4, through which the feed of the tape 7 inside the cassette case 6 set on the main body 2 can be visually checked when the cover body 4 is attached to the case 6. It is for the purpose of Reference numeral 11 denotes unevenness formed on the side wall of the cover body 4 to prevent fingertips from slipping.

Reference numeral 12 denotes a box-shaped mounting portion for a cassette type demagnetizer 13 which is connected to the front portion of the main body portion 2, and a pair of insertion shafts 14, 14 are erected on the upper surface thereof. The main body case 15 of the degaussing device 13 has the same size and shape as a Phillips-type compact cassette case, and by inserting its rotating shaft insertion openings 16, 16 into the insertion shafts 14, 14, the degaussing device 13 can be operated. It is detachably mounted on the mounting section 12 described above. Reference numeral 24 denotes a positioning projection inserted into the capstan insertion opening 37, 38 of each case 6, 15.

Next, details of the cassette type degaussing device 13 will be explained with reference to FIGS. 3 to 6.

Reference numeral 17 denotes a demagnetizing head whose back surface is supported by a wire spring 18 so as to be able to move forward and backward, and a magnetic head insertion opening 19 is provided in the center of the front surface of the cassette case 15.
It has been temporarily installed. The head 17 is disposed so as to be protrusive and retractable from the front surface of the cassette case 15 by means to be described later. 20 is a wiring board on which a degaussing circuit is wired, 21 is a power source battery, 22 and 23 are battery contact plates, and 39 and 39 are guide ribs for the degaussing head 17. 25, 25 are contacts disposed at one corner of the case 15 and exposed to the outside of the case 15 through openings 27, 27 formed on the bottom surface of the case 15,
When the case 15 is attached to the mounting section 12, the contacts 26, 26 arranged at one corner of the upper surface of the mounting section 12
The degaussing circuit is connected to an electric circuit (described later) on the main body 2 side.

Reference numeral 28 denotes a protruding/retracting operator for the degaussing head 17, which is erected above the degaussing head 17, and its upper end slightly protrudes from an elongated hole 29 vertically opened in the upper surface of the case 15. The above switch button
When the case 15 is in the OFF position, place it on the mounting section 12.
When the cover body 4 is placed on top of the degaussing head 17, the upper end of the operator 28 fits between the protrusions 51, 51, and when the switch button 5 is slid with a fingertip, the degaussing head 17 is removed. It moves forward and backward in conjunction with , and protrudes and sinks from the front of the case 15. When the operator 28 is moved forward in the same direction by sliding the switch button 5 from the OFF position to the LO position, the front part of the degaussing head 17 will move into the insertion slot 1.
9 (see dashed line in Figures 5 and 6). 291 is a projection for positioning the operator 28 in the forward position. Here, both the cases 6 and 15 are attached to the main body part 2 and the mounting part 12 with the magnetic head insertion ports 8 and 19 formed on the front surfaces thereof facing each other. 19 is close (see Figure 6). Therefore, when the degaussing head 17 is advanced by operating the switch button 5 as described above, the front part of the degaussing head 17 slightly enters into the case 6 through the insertion opening 8 on the front surface of the case 6, and the front part It lightly contacts the magnetic tape 7 that is being fed along the insertion slot 8 (see the chain lines in FIGS. 5 and 6), and in that state generates a high-frequency continuous alternating magnetic field in the degaussing head 17 as will be detailed later. The signals recorded on the magnetic tape 7 are erased as the magnetic tape 7 is fed. 3
Reference numeral 1 designates a guide roller for the magnetic tape 7 disposed at one corner of the case 6.

Next, to explain the changeover switch section 64 in detail, numeral 32 is a rod-shaped protrusion protruding from the back surface of the degaussing head 17 and serving as a variable contact section whose surface is covered with an insulating material. Two conductive parts 33 are partially provided in the part, and each part is electrically connected to the degaussing head 17. 34, 34 and 35, 35 are fixed contacts arranged in parallel so as to abut on the protrusion 32, and the conductive part 33 is normally located between each contactor 34, 34 and 35, 35. Although the contacts 34, 34 and 35, 35 are open (see solid lines in FIG. 5), when the degaussing head 17 is advanced by operating the operator 28, the conductive portion 3
3 is in contact with the contacts 35, 35 and the contacts 35,
35 conducts and closes a high-frequency continuous alternating current oscillation circuit, which will be described later (see the chain line in FIG. 5), and when the degaussing head 17 retreats due to being pushed by the magnetic head H, the conductive portion 33 connects to the contacts 34, 34. Upon contact, the contacts 34, 34 become conductive and close a well-known gradually decreasing alternating current oscillation circuit (see broken lines in FIG. 5).

FIG. 7 shows an electric circuit, where A is the electric circuit on the winding device 1 side, and B is the electric circuit on the degaussing device 13 side. Reference numerals 40 and 41 are a control circuit and a motor connected to the power supply battery 42 via the switch button 5, and the rotating shaft 3 is connected to the motor 4.
Rotated by 1. 43 is a magnet attached to the lower part of the rotating shaft 3, and 44 is an end sensor. Reference numeral 45 denotes a switch section comprising the switch button 5, variable contact 46, terminal plates 48, 49, and the like. When the switch button 5 is turned to the LO side, the motor 41 rotates at a low speed, and when it is turned to the HI side, the motor 41 rotates at a high speed. 60 is a DC booster circuit connected to the battery 21, 61 is a switching circuit, 6
Reference numeral 2 denotes an oscillation circuit capable of switching and selecting a frequency necessary for tape recording/erasing and a frequency necessary for demagnetization, and 63 a capacitor, which is wired to the wiring board 20. 54 is a switch section connected between the battery 21 and the DC booster circuit 60 for generating a gradually decreasing alternating magnetic field, and 55 is a switch section for generating a continuous alternating magnetic field. These switch sections 54 and 55 serve as the above-mentioned changeover switch section 64.
It is linked by This device has the above-mentioned configuration, and its handling operation will be explained next.

First, when demagnetizing the magnetic head H of the recording/playback device, with the demagnetizing head 17 housed in the case 15 (see the solid line in Figure 5), the degaussing device 13 is attached to the cassette mounting part of the deck (not shown). , operate Detsuki's play button. Then, the magnetic head H on the deck side enters the case 15 through the insertion opening 19, and the degaussing head 17 is pushed back by this, and the switch section 54 of the switch switching section 64 described above is closed, and the oscillation circuit 62 is closed. generates a frequency suitable for demagnetization. Then, the terminal voltage of the battery 21 is boosted by the DC booster circuit 60 and the voltage at the terminal of the battery 21 is boosted by the capacitor 63.
is charged, and when the capacitor 63 is charged to a predetermined voltage, the switching circuit 61 is activated and its discharge current causes the oscillation circuit 62 to oscillate, creating an alternating gradually decreasing magnetic field in the demagnetizing head 17, and demagnetizing the magnetic head H. It will be done.

Next, when winding up the tape 7 in the cassette case 6 and erasing the signals recorded on the tape 7, insert the cases 6 and 15 into the respective insertion slots 8 and 1.
9 are mounted on the main body part 2 and the mounting part 12 so as to face each other, and the cover body 4 is attached. In this state, the upper end of the operator 28 fits between the projecting pieces 51, 51. Next, slide the switch button 5 to the LO position to advance the degaussing head 17 so that the front surface of the degaussing head 17 comes into contact with the tape 7 on the case 6 side (see the chain line in FIG. 5). In this state, the switch section 54 is opened, while the switch section 55 is closed, and the oscillation circuit 62 is directly connected to the power supply side without going through the DC booster circuit 60, the switching circuit 61, and the capacitor 63, and starts oscillating. A circuit 62 generates the high frequency necessary for erasing records on the tape. The motor 41 is activated by the above operation of the switch button 5, the rotating shaft 3 rotates at a relatively low speed, and the tape 7 is wound up. At the same time, the oscillation circuit 62 oscillates a frequency suitable for erasing, producing an alternating magnetic field in the degaussing head 17, so that the signals recorded on the tape 7 are erased as the tape 7 is fed. Driven side rotating shaft 3
The rotational speed of the motor 41 is detected by the end sensor 44, and as the winding of the tape 7 progresses and the rotational speed of the rotating shaft 3 increases, the rotation of the motor 41 is gradually suppressed. automatically stops, and the erasure of the signal recorded on the tape 7 is also completed. Note that the rotational speed of the motor 41 is set at a speed at which the signals recorded on the tape 7 can be erased, depending on the frequency generated in the degaussing head 17. In this way, according to the present device, by simply operating the switch button 5, the tape 7 can be wound and the signals recorded on the tape 7 can be erased at the same time.

Next, when only winding the tape 7 is to be performed, the degaussing device 13 is removed from the mounting portion 12 and the switch button 5 is slid to the HI position. Then, the motor 41 rotates at high speed, and the tape 7 is wound up at high speed.

In the above example, the motor speed was switched between low speed and high speed, and erasing was performed at low speed. However, if it is possible to oscillate a high frequency corresponding to the tape speed, it is necessary to change the motor speed especially for erasing and winding. There isn't.

FIG. 8 shows another embodiment of the present invention, which differs from the above embodiment in that a power storage section 65 consisting of a capacitor is provided in place of the battery 21. If the power storage section 65 is provided in this way, when the demagnetizing device 13 is placed on the mounting section 12, the power storage section 65 will be charged by the battery 42 on the winding device 1 side, so that the magnetic head H can be demagnetized. In this case, the degaussing circuit can be driven by the discharge current of the power storage unit 65 to generate an alternating gradually decreasing magnetic field in the degaussing head 17, and there is an advantage that the battery 21 on the degaussing device 13 side can be made unnecessary.

The above embodiment has been explained by taking as an example a cassette case with the same size and shape as a Philips type compact cassette case, but the present invention is applicable to tapes wound inside cassette cases of other shapes and dimensions, such as microcassettes and video tapes. This can also be applied to winding devices.

As explained above, the tape winding device 1 according to the present invention includes a main body 2 in which the rotating shafts 3, 3 for winding the tape 7 wound inside the cassette case 6 are disposed.
A cassette type degaussing device 1 has a degaussing head 17 disposed such that it can be protruded and retracted from the front surface of a cassette case 15.
3 and a mounting section 12 for the cassette case 6.
and the cassette-type degaussing device 13 can be freely attached to the main body section 2 and the mounting section 12 with their respective magnetic head insertion openings 8 and 19 facing each other and close to each other, and a motor for driving the rotating shafts 3 and 3. Since the switch button 5 of the tape 41 is linked with the push-in operation 28 of the degaussing head 17, the tape 7 can be wound up and the signals recorded on the tape 7 can be erased simply by operating the switch button 5. can be done at the same time.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention.
Figures 3 and 2 are perspective views of the tape winding device, Figures 3, 4, and 5 are plan views, partially exploded perspective views, and partial plane parts of the cassette type degaussing device, respectively, and Figure 6 is the state in use. FIG. 7 is an electric circuit diagram, and FIG. 8 is an electric circuit diagram of another embodiment of the present invention. 1... Tape winding device, 2... Main body, 3...
...Rotary shaft for winding, 5...Switch button, 6...
...Cassette case, 7...Tape, 8,19...
Magnetic head insertion slot, 12... Placement section, 13... Cassette type degaussing device, 15... Cassette case, 1
7...Degaussing head, 28...Pushing/retraction operator, 41...
…motor.

Claims (1)

[Scope of utility model registration request] A cassette type demagnetizer comprising a main body 2 in which rotary shafts 3, 3 for winding a tape 7 wound inside a cassette case 6 are arranged, and a degaussing head 17 arranged so as to be protrusive and retractable from the front surface of a cassette case 15. The cassette case 6 and the cassette type degaussing device 13 are placed on the main body 2 and the holder 12 with their respective magnetic head insertion openings 8 and 19 facing each other and close to each other. In addition to being able to be worn freely,
A tape winding device comprising a switch button 5 of a motor 41 for driving the rotating shafts 3, 3 and a protruding/retracting operator 28 of the degaussing head 17.