JPH0467417A - Magnetic head system - Google Patents

Abstract

PURPOSE:To automatically correct the positional deviation of a magnetic tape from a head block by arranging many magnetic head units in parallel to deal with plural magnetic tracks, and simultaneously, detecting the positional deviation of the tape by using a head for positional deviation detection, and generating voltage for positional deviation correction. CONSTITUTION:At the time of reproduction, if the tape 29 travels as keeping normal height, the ratio of the output of the head 63 of the synchronizing pulse of the track and the output of the head 22 only whose upper half is laid on the track is 2:1. Accordingly, the ratio of the outputs of the heads 63 and 22 to be supplied to a piezoelectric body control circuit 77 is calculated by an internal calculation circuit, and if the ratio increases to more than 2:1, it is decided that the tape 29 is deviated upward, and positive voltage is impressed to a metallic plate 25, and negative voltage is impressed to a movable base 27, and the piezoelectric body 26 is lengthened vertically, and a head set 17 and the head 22 are raised, and the height of the track is made to coincide with the height of the head 63. Thus, a laminated head, etc., to deal with plural tracks of the magnetic tape can be easily and inexpensively mass-produced, and simultaneously, the positional deviation of the track from the head at the time of the reproduction can be automatically corrected.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention consists of a head block that can be manufactured at low cost and has a large number of magnetic strips laminated, and a hanging device that automatically corrects the misalignment of a magnetic stave with respect to the head block. This is an attempt to improve the magnetic head system. Examples will be explained below.

Figures 1 and 2 show a portable fixed head type VT implementing the present invention.
A plan view and a front view of R (video tape recorder) are shown.

In the figure (1) is a main body whose mechanical structure is similar to that of a conventional audio cassette tape recorder. (2) is a small television camera attached to the rear. (3) is also a microphone. (4) is a monitor receiver attached to the front.

(5) is the record button. (6) is the stop button. (7) is recycled water tank. (8):! In the dent on the top of the main unit:! A cassette containing an embedded 6mm magnetic tape. (9X1.O
) is a rotating shaft that protrudes from the main body and is passed through the cassette tape reel. (11) is a capstan fitted into the hole drilled in the cassette. (12) is the hole through which the capstan passes when the cassette is turned over. (13) is a pinch roller
0 (14) is a recording/playback head block. (15) is a head block for detecting tape positional deviation. (16) has an elimination l\w.

Note that (13) to (16) are inserted into the window protruding from the main body of the cassette.

Also, although not shown, actually: From the main unit to the cassette:
Provide a lid connected to a hinge.

Figure 3 is an enlarged plan view of the foot lock (14x15).

Figure 4 is a front view. Figure 5 shows the head block (14
), an enlarged vertical left side view of a part of the cassette (8), etc. 6th
The figure is an enlarged cross-sectional view of J\tsu I block (14). 7th
The figure is a longitudinal sectional front view of the head unit that makes up the Hetset (+7). FIG. 8 is a bottom view of the upper spacer (32) constituting the head unit. FIG. 9 is a top view of the lower spacer (35). FIG. 1O is a vertical right side view of the tip magnetic pole (38).

In the figure, (17) is a head set in the head block (14), which is made up of 30 stacked magnetic head units with a vertical width of 0.1 mm. (18) is the front side: a cover made of ceramic or other material with a front and back width of 1 ms and a top and bottom width of 3 mm. 19) was pasted to the right of it (1
Cover made of the same material as 8). (20) is a ceramic plate attached under the headset and cover. (21) is a ceramic plate attached to the top of the head block (15).

(22) is a head for detecting the vertical position of the tape, which consists of one head unit attached below, and its height is:
From the lowest head in the headset (17), 0.0
25+nm lower. (23) is a ceramic plate attached to its lower surface. (24) is an LSI installed on the back of the headset (17), head unit (22), etc. (
25) is a metal plate attached to the bottom of the board (20x23).

(26) is a piezoelectric body attached to the bottom surface. (27) is a movable platform that can be moved back and forth and connected to the mechanism in the main body (1) attached to its bottom surface. (28) is the bottom of the recess into which the cassette is inserted in the main body (1). (29) is the throat video tape inside the cassette (8). (30) is a piece of foamed resin that provides the force to press it against the head block.

The head unit that constitutes the headset consists of one main magnetic pole and spacers surrounding it on the top, bottom, left and right.

(31) is made of permalloy or other soft magnetic ferromagnetic material, and has a horizontal width of 0.5 mm, a vertical width of 0.05 mm, and a front-to-back length of 3 m.
The main magnetic pole is about m. (32) has the shape of one side as shown in FIG. 8, with a groove (33) in the center and several copper wires (34) formed by printed wiring, vapor deposition, sputtering, photoetching, etc. Upper spacer made of plastic, etc. (35) has a groove (36) on the top surface and a copper wire (3
7) is the lower spacer with attached.

The main magnetic pole (31) is surrounded by copper wire (34X3) with insulating adhesive.
7), It is glued to the spacer (32 x 35), and the space between the upper and lower spacers (32 x 35) is glued with a wiring adhesive containing about 10 to 20% by volume of carbon particles with a diameter of several μ, etc.
The left and right ends of the upper copper wire (34) are electrically connected only to the upper surfaces of the left and right ends of the lower copper wire (37) through a single layer of carbon particles or the like. (The horizontal direction is insulated by the adhesive plastic between the carbon particles.) Therefore, the connected copper wires (34) and (37) are wound several times around the main pole (31). Form a coil, one end of which will be to the left of the trailing edge of the lower spacer, and the other end will be to the right.

A headset (17
).

As shown in Figure 10, the right side of the cover (18) is made of permalloy or other material with a vertical width of 0.05 mm, a horizontal width of 0.1 μm, and a front-to-back length of 1 mm, and is formed by a method such as vapor deposition, sputtering, or photo etching. Tip magnet & (38) is 0
．． There are 30 pieces attached from top to bottom at intervals of 0.5 mm, and when gluing the headset (17) and cover (18), the right side of the rear half of each magnetic pole (38) and each main magnetic pole (31 ) to make contact with the left side of the front end to create a magnetic pole with an integrated main magnetic pole and tip magnetic pole.

A total of 62 electrodes are provided on the front surface of the LSI (24), which are in contact with the rear end of each copper wire (37) of the head cellar (17) and the terminal of the coil of the head cell (22). Wires are connected in the front and back direction with a glue.

Next, the manufacturing method of Hetsera (17) will be explained according to FIGS. 11 and 12.

FIG. 11 is a plan view of the main parts of the manufacturing system for Hetset (1, 7). FIG. 12 is a front view thereof.

(39) has a front and back width of 0.5mm and a top and bottom thickness of 0.05m.
Ribbon of magnetic pole material such as permalloy. (40X41)
is an insulating adhesive pumped out from a pump (not shown).
An adhesive applicator feeds adhesive through the hole opened at the contact surface between the inner cavity and the ribbon (39) and applies it to the surface of the ribbon.

(42X43) is a copper wire (3
4) A continuous thermoplastic plastic film with burr holes, approximately 0.04 mm thick, in which a large number of the units of (37) are attached at regular intervals. (44X45) is a heatable roller with a thick center. (46X47) is -
Heatable rollers of various thicknesses. (48 x 49) is an adhesive applicator that sends out wiring adhesive from a pump (not shown) through the inner space and the holes in contact with the left side of each front and back cloth of the film (42 x 43), and applies it to the film. (
50X51) is a flexible roller. (52) is a film (4
2) An adhesive applicator similar to (40) for applying adhesive to the upper surface of the item. (53) is an anvil, (54) is a punch with the same shape and size as (+7).

(55) is a pressure rod made of a material that does not adhere easily to adhesive and is fitted into a punch. (56) is a roller. (57)
is a geared roller that meshes with the perforation of the film (42x43).

Although not shown, the front and rear ends of each roller are supported by bearings and connected to a motor, and the punch (54) and pressure rod (55) are connected to a drive device, respectively.

Next, this operation will be explained.

The roller (56 x 57) is driven by a motor and the ribbon (
39) and the film (42x43) moves to the right at a constant speed.

At that time, the adhesive applicator (40) is used around the ribbon (39).
The insulating adhesive is applied at (41) and the film (4
2X43) is sandwiched between heating rollers (44) to (47), a shallow groove is made on the left side, the copper wire (34X37) is also deformed, and adhesive is applied to the front and rear edges of the film and copper wire vI (48X
49), the wiring adhesive is applied, and the pressure roller (
5o) (51), and the ribbon (39) is attached to a copper wire (34x37) and a film (42x43) via an insulating adhesive.
), film (42X43) and copper wire (34X
The front and rear edges of 37) are glued together using a wiring adhesive.

Although not shown, the punch (54) and the pressure rod (55) are connected to a drive device that works with the roller (57), and the copper wire (34)
) (37) - Each time the unit comes directly below, it makes one movement and punches out the integrated product of the film (42×43) coated with adhesive and the ribbon (39) using the adhesive applicator (52).

At that time, the punch (54) always descends to just above the anvil (53), but the pressure rod (55) first descends to 0.1 mm above the anvil, then to 0.2 mm, and then to 0.3 mm.
The thickness of the adhesive layer inserted between the laminates is controlled by descending to a high position in steps of 0.1 mm, and the distance between each unit is controlled.

When punching has been performed 30 times, the punch and the pressure rod move forward, and only the pressure rod descends, causing the stack inside the punch to fall in front of the duck.

This laminate is a headset (17),
Polish the surrounding area appropriately, cover (18x19), LSI (2
4) Glue the others to obtain a head block (14).

Note that the surface of copper & I (34 x 37) is hard and flat, so large carbon particles in the wiring adhesive will come into contact with both copper wires, but small ones will not. The resistance value may become high.

As a countermeasure to this problem, it is conceivable that instead of carbon particles, fine particles made of metal or the like, which are deformed under pressure, may be added to the wiring adhesive.

FIG. 13 is a plan view of elastically deformable conductive fine particles used in such a wiring adhesive. FIG. 14 is a side view thereof.

These particles (58) are made by twisting and laminating two copper wires (phosphor bronze wire or other wires may be used) with a diameter of about 5μ, deforming each wire into a spiral shape, and cutting it at a pitch of about 10μ. A large number of coiled copper wire particles made by applying vibration to untangle two wires are dispersed in an adhesive and sandwiched between G4 wires (34 x 37). , particles (5
8) No matter which direction it faces, it is elastically deformed by pressure and all particles can come into contact with the copper wire (34 x 37), reducing electrical resistance, making it suitable for uses other than the above. You can also use it.

The shape of this particle is arbitrary: it can be chosen. Examples include a long oval ring bent into a U-shape when viewed from the side, a dendritic ring, a metal foil rolled up into paper scraps, and others.

Various manufacturing methods are possible; for example, two thin synthetic fibers with different physical properties are pasted together to create a material that is easily wrinkled, like wool.
- Sprinkle aluminum plating, bundle a large number of them together, twist them together, heat and deform them, cool them and then cut them into short pieces to obtain objects like particles (58), or cut thin soft plastic tubes into rings. It can be obtained by silver plating with a silver mirror reaction, or by plating the surface of starch particles or rubber particles with silver, or by making a film from plastic used for adhesives, plating the film surface with aluminum, and photoetching it to form fine swirls. A heating gear with fine teeth is made of an aluminum layer with many lines and zigzag lines arranged in a row.
The plastic may be processed into a corrugated shape, immersed in a solvent that melts the plastic, and then the plastic may be immersed in a solvent that dissolves the plastic to obtain particles such as deformed spiral lines dispersed in the adhesive. Blow gas and apply ultrasonic vibration to mix the two, and spray the mixture from a thin nozzle into the nitrogen gas at room temperature and pressure to obtain fine particles of foamed aluminum, which can then be added to the adhesive. .

Naphthalene or the like may be burned to produce soot in which fine carbon particles are connected in a dendritic manner, and then heated in an oxygen-free atmosphere to harden the dendritic form to obtain particles capable of elastic deformation.

Next, the operation of this VTR will be explained with reference to the electrical circuit diagram shown in FIG.

In FIG. 15, (59) is a red light head group consisting of the first to fourth heads at the top of the headset (17).

(60) is a green signal head group consisting of 5th to 24th heads. (61) is a head group for green lights consisting of v, 25-28.\t. (62) is a signal head consisting of the 29th head.

(G3) is a control signal head consisting of the 30th-\t. (
64) i, tH image No. 18 processing circuit. (65) is a red light recording circuit.

(66) is a green signal recording circuit. (67) is a green signal recording circuit. (68) is a red 1 word re-use circuit. (69) is a green signal regeneration circuit. (70) is a circuit for reproducing one blue word. (71
) is a circuit for producing synthetic television signals. (72)! External output terminal.

(73) is a recording/playback circuit, and (74) is a speaker. (75); Yo synchronization signal generation circuit. (7G) jyo synchronization name reproduction circuit.

(77) is a piezoelectric control circuit.

Of these, the circuits (65) to (70) may be provided in the LSI (24), and the others may be provided in the main body (1).

Main gun Iff (3) of each unit in the headset (17)
1) is connected to the tip magnetic pole (38), and together they form a head for perpendicular magnetic recording, and an alternating current signal of approximately 50 't cycle is applied to a width of 1 cm in the left and right direction of the video tape (29). can be recorded.

If the person carrying this VTR presses the record button (5),
A central control circuit (not shown) in the main body (1) operates, and the video signal captured by the camera (2) is sent to the video signal processing circuit (64).
Processed and separated into three primary color signals, divided into red component, green component, and blue component, each specific force voltage is times! (6506
6X67) and the corresponding head unit group (59X
60x61), and from each head, use a capstan (11) and a pinch roller (13) to remove 4 cm/
The information is recorded on the A side (upper half) of the tape (29) that is fed to the left at a speed of s.

The synchronization signal generation circuit (75) generates a 4M)lz clock pulse and sends it to the circuit (65x66x67).

Using this clock pulse, the circuits (65) and (67) generate a 0.8MHz clock pulse using a built-in frequency dividing circuit, and the first clock pulse of the head group (59) is generated with a period of 1.25μs.
The red signal voltage is sent to the first head, the voltage of the next cycle is sent to the second head, the next cycle is sent to the third head, then the fourth head, the blower is sent again to the first head, and so on. , on the 1st to 4th tracks of side A of tape (29), width 0.2
Each - analog pulse is perpendicularly magnetically recorded in a range of .mu..

Therefore, 200,000 analog pulses are recorded in a range of 4 cm per second on one track.

Similarly, the green signal voltage is sequentially sent to the four heads in the head group (61) and recorded on the 25th to 28th tracks of the tape.

Since the frequency of the green signal component included in the NTSC video signal is higher than that of red and blue, the clock frequency of 4 Mtlz is used as is, and the circuit (66) is sequentially applied to the 5th to 24th heads of the head group (60). Repeat this process of sending green voltage and recording on the corresponding tape track.

Note that in this case, since the time for energizing each head is shortened, the amplification degree is increased to energize each head.

The width of one pulse on the tape is slightly smaller than that for red and blue, but it is never less than 0.1μ of the width of the tip magnetic pole (38).

At the same time, the synchronization signal generation circuit (75) has a positive polarity of 0.2N.
Generates pulses such as the H2 playback control synchronization signal, the negative polarity 15750H2 horizontal synchronization signal, and the negative polarity 60H2 vertical synchronization signal, sends them to the control signal generator (63), and records them on the 30th track of the tape. do.

The sound entering the microphone (3) is transferred to the recording/playback circuit (7).
3), enters the audio signal spatula 1'' (62), and records it on the 29th track of the tape.

During these recordings, the erasing spatula (16) is energized from the recording/reproducing circuit (73) to erase the recording of the gold width on the A side.

During such recording, the signal output from the video signal processing circuit (64) is input to the monitor receiver (4), and the user can adjust the direction in which the camera is pointed while viewing the video.

When the recording of side A is finished, reverse the case foot (8) and record on side B.

After recording side B, turn the cassette (8) once again, return it to side A, press the play button (7), and when it is in playback mode, the tape will advance to the left and each head will be played. A voltage output occurs.

The positive polarity 0.2MHz control signal regenerated to the control signal head passes through the rectifier in the synchronization signal regeneration circuit (76) and enters the red, green, and blue signal regeneration circuit (68869X70), and the red and blue circuits , converted to a 0.8 MHz switching pulse, the switching circuit switches to 0.8 NH2, and the red light and green light head groups (59 x 61) are sequentially connected from the top head to the lower head in each group, When you reach the bottom, you return to the top again and repeat.
The output voltage of each head is sent to a receiver (4) to reproduce red and blue video components.

In the green signal reproducing circuit (69), the 0.2 MHz synchronization signal is converted to 4 MHz, and the internal switching circuit is switched to sequentially switch from the top head to the lower head in the head group (60). , when it reaches the bottom stage, it repeats the process to reach the top stage again, and the output voltage of each head is sequentially transmitted to the receiver (
4) Send to.

Each output of the reproduction circuit 1 (68x69x70) enters the composite television signal production circuit (71), and in the same way as the three primary color video output voltages are converted into one video signal in a color television camera, - video converted into a signal.

Further, reproduction output pulses of negative polarity horizontal synchronization signals and vertical synchronization signals from the synchronization signal reproduction circuit (76) enter the circuit (71) and are added to the video signal.

Furthermore, the playback output of the audio spatula F (62) also passes through the recording/playback circuit (73), enters the circuit (71), and is added to the composite television signal.

At the same time, reproduced sound is played from the speaker (74) in the main body (1).

This composite television signal is sent to another television receiver via a cable connected to an external output terminal (72).
Images and sounds can be played back.

When the tape (29) runs at a normal height during playback, the 30th track's gate pulse ・＼ツF (63)
The ratio of the output of the hexameter 1" (22) to that of the spatula 1" (22), which is only present in the upper half or in the 30th track, is 2:1.

Therefore, the spatula I' (63) enters the piezoelectric control circuit (77).
) and (22) using an internal calculation circuit, and if the ratio increases from 2:1, it is determined that the tape (29) has shifted upwards.The station applies a positive voltage to the metal plate (25). , movable platform (2
Apply a negative voltage to 7), stretch the piezoelectric body (26) up and down,
Raise the headset (17) and the head (22) to match the height of the 30th track and the head (63).

If this ratio decreases, meaning that the tape (29) is lowered, an opposite voltage is applied to the piezoelectric body (26), which contracts and corrects the misalignment between the track and the head.

As shown in step 2, even if the tape shifts upward or downward, the relative shift can be corrected.

Note that various design changes can be made to the above embodiment. The outline is described below.

The above copper wire (34 x 37) is only described in the case of a single layer, but several layers of thin copper wire are stacked with an insulating film interposed between them, and both ends of each copper wire are close to the film surface: they extend horizontally to the left and right. However, the ends of each layer may be connected with a wiring adhesive.

: @11-12 Figure', Nio Cf Le'7 Irum (42
X43) (7) Omit the copper wire attached to the left side of the vertical part, omit the adhesive application Im (40) (41), and instead wrap a thin enameled wire several times at that position and tie both ends of the enameled wire. At the left side of the coil, attach a ribbon (39 mm) in front and behind the coil.
) to make a coil with the same shape as the coil made of copper wire (34 x 37), sandwich it between fims (42 x 43) coated with insulating adhesive, and punch (54).
Punch them out and stack them to make a headset, polish the left side to expose the end of each coil, and use LSI (24
) may also be glued. A coil may be formed around the ribbon (39) using printed wiring.

In these cases, the thickness of the film (42) is doubled, the depth of the central groove is increased, and the film (43) is omitted;
They may be punched out with a punch (54) and stacked.

Instead of interlocking geared rollers (57) and punches (54) that mesh with the perforations of the film (42x43), a beam of light is applied from above the horizontal part of the film (42), and a photoelectric element is used to punch the ribbon (39). ) and the amount of reflected light from the copper wire attached to the film is detected by a photoelectric element, and when the group of copper wires comes directly under the punch (54),
A punch may be controlled to punch it out.

The front and back width of the film (42 x 43) may be increased, several ribbons (39) may be arranged one after the other, and a large number of head units may be manufactured at the same time.

The front and rear ends of the main magnetic pole (separate) shown in Figure 6 are extended to the left by about 1 mm to form a U-shape, and the copper wire (3
7) The right rear part passes through the bottom surface of the main pole and is exposed on the rear surface of the headset, and two sets of similar headsets are made, one upside down, and both are glued between the sides. Due to leakage magnetic flux from the gear that occurs between the front ends of the main magnetic pole,
It may also be recorded on a video tape.

In that case, the film (42×43) may be hardened by adding alumina powder or the like to prevent wear caused by contact with the tape.

The fluorescent screen of a cathode ray tube has a width of 0.1 mm and a vertical length of 100.
In the telephotography method, thousands of red, green, and blue phosphor lines of 1.0 mm in length are arranged alternately, and each phosphor line is sequentially scanned horizontally and vertically using a tree's electron beam.The first bright spot in the upper left corner of the screen (red) to the first head of the headset (17), and the second head on the right.
The bright spot (green) is on the second head, the third bright spot (blue) is on the third head, the fourth bright spot (red) is on the fourth head, the 28th bright spot (red) is on the 28th head, It's a good idea to press the 29th bright green) against the 1st head.

The vertical width of each head of the headset (17), the total number of stacked heads, and other values can be arbitrarily selected.

If the structure of the cassette (8) can be devised to minimize the vertical deviation of the tape (29), the piezoelectric material (2
6) etc. may be omitted.

A head unit or headset made with the apparatus shown in Figures 11-12 may be used in a conventional VTR.

Instead of expanding and contracting the piezoelectric body (26) to move the headset (17) up and down, a small motor is used to turn the screw and the electrode (25)
) You may move the object above up or down.

A similar foot unit is provided directly above the head unit (22), and the positional deviation of the tape (29) is detected from the output ratio of both, and the voltage applied to the piezoelectric body (26) is controlled.
But that's fine.

On the left side of the head block (14), 0.05m from it.
Attach a second head block similar to (14) by shifting it up about m, and then attach a 0.
．． A similar third head block was installed with a shift of about 0.5 mm, and the tape (29) detected by the head (22) etc.
Depending on the distance of the fffffi shift, the optimum one of the three runt lock outputs may be used as the reproduction output.

Positional deviation detection spatula)" (22) is omitted, and during playback,
If the output of the 30th head for control in (17) is below a certain value, a slight positive search voltage is applied to the electrode (25), and if the output increases, the Increase the applied voltage in the positive direction; when the output peak has passed, fix the voltage and correct the positional deviation.
If the output decreases after applying the search voltage, the electrode (25
) A control circuit may be provided to increase the applied voltage gradually in the negative direction or to fix the voltage when it slightly passes the peak.

For magnetic disk drives in computers, a headset may be used in which the total number of tracks and feet are laminated, or a headset consisting of one to several head units may be used with a spacer of 1 to several mm thick. By using a large number of spacers that are stacked together and fixed together and moved in the radial direction by the distance of the spacer, the entire track can be covered and the access time can be shortened.

Like a conventional VTR, it initially records only from the first head in the headset (17), and when it reaches the right end of the tape (29), the tape is advanced to the right by auto-reverse and recording starts from the second head. When you reach the left end, move the tape to the left again and use the third head, etc., first, red, green,
The blue signal may be recorded from the first to third head, and when the right end of the tape is reached, the tape is shifted to the right and at the same time recording is started from the fourth to sixth head.

However, it is necessary to increase the output of the tape drive motor, and the power consumption and tape wear are almost the same as those of conventional helical scan type VTRs.

In this case, the control signal is recorded on the tape from the spatula I'' (22), playback is also performed from the tape, and only the spatula I'' (17) consisting of 2 to 4 heads are mechanically moved step by step when the tape direction is reversed. You may also try lowering it.

Ribbon (39) and film (4) in Figures 11-12
2) The integral stop (43) can be sent to the right at a considerable speed, but the set of punch (54) and pressure rod (55)
Since it cannot be driven at such a high speed, a set of punches and pressure rods are added to a remote position on the right side of (54 x 55), and odd-numbered coil units in integrated objects such as film (42) are placed on the left side. It may be punched out using a punch, and even-numbered coil units may be punched out using the punch on the right side.

Cut out the part of the LSI (24) that comes in contact with the headset (17), and use a method such as photo-etching to attach 30 sets of metal wires corresponding to the copper wires (37) connected to the electrodes on the front of the LSI. A ferromagnetic LT magnetic pole corresponding to the main pole (31) and the tip pole (38) is formed on the front surface of the main pole through an insulator, and a copper wire ( 37) Form a metal wire equivalent to the copper wire (34) that is directly connected to the corresponding part, attach a ceramic plate, etc. to the front of the wire, and attach the L with the headset (17).
An SI (24) may be made and attached onto the ceramic plate (2) with the tip of the magnetic pole facing the tape (29).

In case 2, in order to make only the tip of the magnetic pole thin, it is sufficient to first perform thin vapor deposition over the entire length, and then overlay thick vapor deposition on areas other than the tip.

The playback output signals of the red, green, and blue playback circuits (68869X70) and the recording/playback circuit (73) are written to the IC memory via the A-D converter, respectively.
They may be read out in the 111st order using stable clock pulses and sent to the composite television signal reproducing circuit (71) via a D-A converter to eliminate speed irregularities during reproduction of the tape (29).

One word of the digitized television image, the digital signal of the pond is transferred from the headset (17) to the tape (2).
9) may be recorded.

In that case, in an 8-bit parallel coat, the 1st to 8th bits are used, followed by the 9th to 16th bits, and then
For example, the 17th to 24th hexes may be used, and in the case of a serial code, the 1st to 28th hexes may be sequentially used.

The 1.8.15.22 head in the headset (17) is used for red lights, the 7.14.21.28J head is used for green lights, and the other 2 to 27 heads are used for green lights. ．．
The 1st to 28th heads can be rented out sequentially with one type of clock pulse such as 4MH2, and the output of the red light recording circuit (65) is sent to either the red light recording circuit (66) at any time.
The output of is sent to one of the force signal heads at any time, etc.
During reproduction, the output of the red signal head is sent to the red signal regeneration circuit (68) at any time, and the output of the green signal head is sent to the circuit (68).
9) You can send it to 9).

In the second case, a waveform shaping circuit using a riko capacitor or the like is provided within the reproduction circuit (68x69x70) so that the output wave becomes a continuous analog wave.

If you wish to refuse to have commercially available tapes containing movies or music (29) copied, you can do the following:

In addition to video and audio, the tape (29) also contains a copy refusal signal. Various forms of the signal are possible, but
You can do it like this:

I\set) In addition to various synchronization signals, the 1O
A copy refusal signal consisting of a K+12 pulse, a 10H2 sine wave alternating current, or the like is inserted continuously or only during the blanking period of the video signal. (It may be encoded. A dedicated track and a dedicated head may be provided.) This copy refusal signal is transmitted during the synchronization signal reproduction cycle ffJ (76);
The output signal is separated using a band-pass filter, etc. installed, converted to DC using a rectifier, etc., and added to the synthesized television signal production circuit (71). The signal is connected to the external terminal (7
On the way to 2), open the switching circuit you inserted here.

As shown in 2, put a copy refusal signal on the tape (29), install a detector for the signal in the reproducing circuit, and install a circuit to block output to the external terminal using the output signal of the voltage detector. ;Yo, you can prevent the contents of the tape (29) from being copied.

Such a copy prevention method can also be applied to digital audio tape recorders, computers, etc.

Note that various designs can be made for the format of the coating of the copy refusal signal, the recording location on the tape or floppy disk, the detection circuit for the signal, the circuit for cutting off transmission to the external terminal or the copying circuit, etc.

Ribbon (39) and film (42X) shown in Figures 11-12
The integral fasteners of 43) may be coated with adhesive, stacked in several layers, punched out with a punch (54), and stacked.

A piezoelectric element is sandwiched between each head unit in the headset (17), and they are connected in parallel to a misalignment correction voltage generation circuit, and the tape (29) is connected to the head unit (17).
It may be possible to adapt to differences in thermal expansion coefficients, etc.

Other various design changes to the invention are possible.

By carrying out the present invention, it is possible to easily and inexpensively mass-produce laminated heads that can accommodate multiple tracks of magnetic tape.
There is an advantage that a head system is provided which can automatically correct the positional deviation of the track relative to the head during playback.

[Brief Description of the Drawings] Figure 1 shows a portable fixed head type V T embodying the present invention.
A plan view of R. Figure 2 is its front view. FIG. 3 is an enlarged plan view of the head block (14x15). Figure 4: i Its front view. Figure 5 shows the head block (14) and cassette (
FIG. 8) is an enlarged longitudinal sectional front view of a part of 8). Figure 6 is an enlarged cross-sectional view of l\footlock (14). Figure 7 shows the headset (
FIG. 17) is a longitudinal sectional front view of the head unit that constitutes the unit. FIG. 8 is a bottom view of the upper spacer (32) constituting the head unit. FIG. 9 is a top view of the lower spacer (35). FIG. 10: A vertical right side view of the tip magnetic pole (38). 11th
The figure is a plan view of the main parts of the Hetset I-(+7) manufacturing system. Figure 12 is its front view. FIG. 13 is a plan view of elastically deformable conductive fine particles contained in a wiring adhesive. 1st
Figure 4 is its side view. Figure 15 shows the V T shown in Figures 1 and 2.
It is an electric circuit diagram of R. Akihiro Fujimura No. 3, 1,000 drawings, 15 drawings (Orihirazu Kayazu Procedure Supplementary IE Book)

Claims (1)

[Claims] Using techniques such as printed wiring and photo-etching, one half of the coil unit is formed by several short parallel metal wires on the surface of an insulating film or on the insulating film on the surface of the LSI. A magnetic pole made of ferromagnetic material and whose surface is covered with an insulating material is attached to the upper center of the wire, and on top of these are several magnetic poles whose both ends are connected to each end of the metal wire or the electrode of the current input/output circuit. Attach a metal wire to form a magnetic head unit, arrange a large number of magnetic head units in parallel to form a magnetic head set corresponding to a plurality of magnetic tracks, and detect positional deviation of the magnetic tape during reproduction of magnetic recording. The positional deviation of the tape is detected using the outputs of one or two heads in the headset or the output of a positional deviation detection head provided adjacent to the headset, and a voltage for correcting the positional deviation is generated. A magnetic head system consists of a control circuit installed below the headset, a piezoelectric body for moving it up and down, and a screw driven by a servo motor, and a voltage applied to correct misalignment.