JPS62262215A - Signal scanner assembly for rotary recording medium - Google Patents

Abstract

PURPOSE:To narrow a recording track pitch by adjusting the interval between the 1st and 2nd signal scanners so as to be an integral number of multiple of the recording track pitch of recording tracks recorded and formed on a rotary recording medium. CONSTITUTION:The degree of screwing of a supporting member Cs implanted to the support F into a pivot 23 for position adjustment is adjusted while a supporting member Ch for a magnetic head and a supporting member Cs for a reproducing stylus are connected to a support F of the signal scanner assembly. In this case, the supporting member Cs is turned around the tip of the pivot 22 so that the distance between the magnetic head H fixed to the tip of the supporting member Ch and the reproducing stylus S fitted to the tip of the supporting member Cs is changed depending on the degree of screwing the supporting member Cs implanted to the support F into the pivot 23 for position adjustment. Thus, said distance is adjusted to a proper distance by the adjustment of screwing the supporting member Cs into the pivot 23 for position adjustment, that is, an integral number of times of the recording track pitch of the rotary recording medium.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a signal scanner assembly for a rotating recording medium suitable for high-density recording and reproduction.

(Prior Art) As the demand for recording various information signals at high recording densities has increased, in recent years, information recording media created based on various structural and operating principles have been used to record information signals at high recording densities. With the advent of high-density recording and reproduction, for example, recorded optical discs (read-only optical discs) are copied from master discs on which information signals are recorded using bits formed as geometrical concave or convex parts. Commercialized as video discs, compact discs, etc.
In addition to the fact that it has already begun to become popular in ordinary households, recorded discs (playback discs) are reproduced from master discs on which information signals are recorded using bits formed as geometrically concave or convex parts, onto conductive discs. As mentioned in 1!45io, a dedicated capacitance value change detection type information recording medium has been commercialized and is already beginning to be used in ordinary households.

In order to meet the demands for high-density recording and reproduction in various technical fields, it is necessary to irradiate the recording layer of an information recording medium with a recording beam whose intensity is modulated by an information signal, or to apply an electric field whose intensity is modulated by an information signal. As a result, research has been conducted on information recording media in which information signals are recorded by causing physical or chemical changes in the recording layer of the information recording medium in accordance with the information signal. Electrical characteristics (light transmittance.

2 with different reflectance, absorption, electrical resistance, and other properties)
A material that has three or more stable structural states and undergoes a transition between the above-mentioned stable structural states by external application of optical, electrical, or thermal energy is deposited on the substrate by vapor deposition or sputtering. For information recording media belonging to the phase change type, which is formed by applying a method to form a film and used as a recording layer, for example, there are information recording media (write-once type information recording media) on which the user can record data only once (write-once type information recording media). Active research and development is being carried out to put it into practical use as an erasable information recording medium, for example, as a file memory for offices and for other uses.

By the way, the magnetic recording and reproducing method in which information signals are recorded and reproduced magnetically can extremely easily record information signals on a magnetic recording medium and reproduce information signals from the magnetic recording medium. It has been widely used as a means of recording and reproducing information signals in many technical fields, but as the demand for high-density recording and reproduction of information signals increases, the distance between recording traces (track pitch) has become narrower. It has become requested.

However, when the interval between recording traces is narrowed, it becomes difficult to make the magnetic head accurately trace the recording traces, so various tracking control means have been applied to solve this problem. However, when recording density is further increased, recording mechanisms with extremely high mechanical precision are required to prevent overlapping of recording traces during recording. This inevitably makes the equipment expensive.

Therefore, tracking control information is recorded in advance on a magnetic recording medium in a state where it can be detected as a change in capacitance value, and when information signals are recorded on the magnetic recording medium and when information signals are reproduced from the magnetic recording medium. Sometimes, tracking information previously recorded on the magnetic recording medium described above is detected as a change in capacitance value, and the detected tracking information is used to narrow the magnetic head under tracking control operation. A high-density information recording and reproducing method that allows tracing of recorded traces is disclosed in, for example, Japanese Patent Application Laid-Open No. 57-16717.
In addition to what is disclosed in Publication No. 2, tracking control information is deep-recorded in a magnetic recording/reproducing medium in advance, and when recording an information signal on the magnetic recording medium and when reproducing the information signal from the magnetic recording medium, Tracking information previously recorded deep in the magnetic recording medium is reproduced, and the reproduced tracking information is used to enable a magnetic head to follow a narrowed recording trace under tracking control operation. A high-density information recording and reproducing system is also disclosed in, for example, Japanese Patent Application Laid-Open No. 113321/1983.

Now, when implementing the high-density information recording and reproducing method as disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 57-167172, a magnetic head having an electrode for detecting a change in capacitance value and a magnetic gap is used. It is necessary and also the above-mentioned Japanese Patent Application Laid-Open No. 6
When implementing a high-density information recording and reproducing method as disclosed in Publication No. 0-113321.

A magnetic head is required that includes a magnetic gap for reproducing tracking information and a magnetic gap used for magnetically recording and reproducing information signals to be recorded and reproduced.

FIG. 5 shows a single-type recording/reproducing element equipped with a magnetic head and electrodes used in implementing the high-density information recording/reproducing method as disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 57-167172. 5 is a diagram showing an example configuration of a recording/reproducing element, and (,) in FIG. 5 is a perspective view of a single type recording/reproducing element equipped with a magnetic head and an electrode, where 1 is a magnetic gap and 2 is an electrode. .

3 is a thin film made of ferromagnetic material, 4 and 5 are ferrite cores, 6 to 8 are members made of glass, 9 and 10 are coils,
11 is a lead wire to the coils 9 and 10.

12 is a lead wire connected to W1 pole 2.

FIG. 5(b) is a plan view showing the sliding surface of the magnetic head portion of a single type recording/reproducing element equipped with the magnetic head and electrodes shown in FIG. 5(a). 88 in the figure indicates the end of the portion 8 in FIG. 5(a), TW indicates the track width, and EW indicates the electrode width.

In the single type recording/reproducing element shown in FIG. 5, both the track width TW at the magnetic head portion and the electrode width EW at the tip 2a of the electrode 2 are precisely set to predetermined dimensions of several microns. However, it is difficult to process such minute dimensions with high precision, and the magnetic gap 1 formed in the magnetic head portion
and the end 2a of the electrode 2, there is a distance α in the extending direction of the recording trace.
Due to the distance between It becomes difficult to bring the tip 2a of the electrode 2 into good contact with the magnetic recording medium at the same time, and since the shape is large as described above, the mass becomes large, which deteriorates the surface runout tracking characteristics of the magnetic head. Besides becoming bad,
The recording trace traced by the magnetic gap 1 in the magnetic head part and the W1 pole 2
Since the recording trace followed by the tip 2a of the electrode is the same, off-track is likely to occur.Furthermore, the magnetic gap 1 in the magnetic head portion and the end 2a of the electrode 2 are connected to the pit row where the tracking information is recorded. There are problems such as difficulty in setting the position so that it is correctly positioned in the middle of the area.

Furthermore, the magnetic head used in implementing the high-density information recording and reproducing method as disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 60-113321 has a magnetic gap for reproducing tracking information and is subject to recording and reproducing. Also in the case of a single type recording/reproducing element having a configuration having both a magnetic gap for magnetic recording and reproduction of an information signal, the 5th vj! There are problems similar to those in the case of a standalone recording/reproducing element as described with reference to No. 4.

(Problems to be Solved by the Invention) The above-mentioned problems with the single type recording/reproducing element are related to the signal scanner for reproducing tracking information.

It was thought that the problem could be solved by configuring the signal scanner for reproducing the information signal that is the target of recording and reproducing separately, so the signal scanner for reproducing the tracking information as shown in FIG. Prototype studies were conducted on a signal scanner assembly in which a signal scanner and a signal scanner for reproducing information signals to be recorded and reproduced are each constructed separately.

FIG. 7 illustrates a conventional signal scanner assembly in which a signal scanner for reproducing tracking information and a signal scanner for reproducing an information signal to be recorded and reproduced are each configured separately. - (a) of Fig. 7,
In (b), H is a magnetic head, and S is an electrode needle for detecting changes in capacitance.

The signal scanning device assembly shown in FIG. A member 13 attached at a predetermined distance is fixed to the tip of a bifurcated cantilever 14.

The base of the bifurcated cantilever 14 described above is connected to the movable part 17 of the actuator ACT via dampers 15 and 16 made of an elastic material, and the 71st
3! ! In (a) of I, D is a rotating magnetic recording medium, and this rotating magnetic recording medium is previously provided with bits P, P, . . . columns based on tracking information.

The magnetic head H and the reproducing meter S are located at a predetermined distance N-TP on the rotating recording medium.

Tracking control is performed based on the tracking information read by the reproducing needle S, so that the magnetic head H records or reproduces information signals.

However, in the signal scanner assembly configured as shown in FIG.
4 are fixed in a strong state, the a & kehehehe II and the playback meter S are displaced as a unit, so due to causes such as the presence of surface wobbling that is unavoidable in one revolution of the recording medium. When one signal scanner is displaced, the other signal scanner is also displaced as shown in Figure 7(c), so both signal scanners are rotated with good sliding contact. The problem was that it could not be brought into sliding contact with the recording medium.

In order to solve the problems in the signal scanner assembly having the configuration shown in (,) of FIG. A damper 1 made of an elastic material is placed between the assembly, that is, a member 13 in which two signal scanners are attached at a predetermined distance apart from each other by a predetermined distance that is an integral multiple of the recording trace interval TP, and the tip of a bifurcated cantilever 18.
A signal scanner assembly having a configuration in which a 9 is interposed has been considered.

In the signal scanner assembly having the configuration as shown in FIG. 7(b), the problem that occurs in the signal scanner assembly having the configuration as shown in FIG. The problem can be solved well when the signal scanner is in a static operating state, but when the signal scanner is connected to the movable part 17 in the 7 actuator ACT of the tracking control system, the tracking control for the signal scanner is When the drive displacement is performed for the purpose of driving, the member 13 and the bifurcated cantilever, in which the two signal scanners are attached at a predetermined distance that is an integral multiple of the recording trace interval TP, as described above. 18
A damper 19 made of an elastic material is interposed between the tip of the
Since the signal scanner operates as a mechanical low-pass filter, a problem arises in that the signal scanner does not operate in accordance with the driving force of the actuator.

(Means for Solving the Problems) The present invention provides a rotary recording medium including a first and a second signal scanner which are in sliding contact with a rotating recording medium and can reproduce at least an information signal. A signal scanner assembly for a recording medium, comprising: a first signal scanner support member having the above-described first signal scanner fixed near one end; and the above-described second signal scanner. is fixed near one end of the second signal scanner supporting member, and the other end of the second signal scanner supporting member is fixed to the first end. Second
The distance between the signal scanners is set to be an integer multiple of the interval between the recording marks to be recorded on the rotating recording medium, and the common displacement drive mechanism of the signal scanners is transmitted through each individual contact pressure application mechanism. a signal scanner assembly for a rotating recording medium connected to a movable part; and first and second signal scanners that are in sliding contact with the rotating recording medium and can reproduce at least information signals. A signal scanner assembly for a rotating recording medium, comprising: a first signal scanner support member having the first signal scanner fixed thereto near one end thereof; The other end of the second signal scanner supporting member, to which the second signal scanner is fixed near one end, is connected to a common movable part in the displacement drive mechanism of the signal scanner through individual contact pressure applying mechanisms. In addition to connecting to the above-mentioned 1. A signal scanner assembly for a rotating recording medium, comprising means for adjusting the interval between the second signal scanner and the second signal scanner to be an integral multiple of the interval between recording marks to be recorded on the rotating recording medium. The present invention is intended to solve the above-mentioned problems.

(Embodiments) Hereinafter, specific details of the signal scanner assembly for a rotating recording medium of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a plan view from the back side showing a part of the signal scanner assembly for a rotating recording medium in cross section in order to explain the configuration fM principle of the signal scanner assembly for a rotating recording medium according to the present invention. , FIG. 2 shows a method for recording information signals on a rotating recording medium using the signal scanner assembly for a rotating recording medium shown in FIG. 1.
A perspective view showing a state in which information signals are being reproduced from a rotating recording medium, and FIG. 3 shows recording traces of the rotating recording medium and ff
fff is a perspective view showing the relative relationship between the front scanning elements.

FIG. 4 is a diagram showing an example of the configuration of a part of the signal scanner assembly.

FIG. 1 shows an embodiment of a signal scanning element assembly for a rotating recording medium in which a magnetic head H and a capacitance change detection type reproducing meter S are used as the signal scanning element. ,
It will be appreciated that other types of signal converters may be used as signal scanners in implementing the signal scanner assembly for rotating recording media of the present invention.

In Fig. 1, H is a magnetic head, S is a capacitance change detection type reproducing needle (hereinafter referred to as reproducing needle), and the magnetic head H and reproducing meter S are the tips of separate support members. fixed to the part.

7 In FIG. 1, ch is a support member for the magnetic head,
Further, Cs indicates a supporting member of the reproducing needle, but in the following explanation, there is no distinction between the supporting member ch of the magnetic head H and the supporting member Cs of the reproducing needle, and they will be commonly explained as supporting members of the signal scanner. In some cases, as in the case of the support member C of a signal scanner, the subscript and s are omitted.

In FIG. 1, F is a support portion of a signal scanner assembly that is fixedly connected to the movable part of the actuator ACT (see FIG. 2), and the support portion F of this signal scanner assembly is
Actuator ACT, which will be described later with reference to FIG.
When the movable part A rotates about the rotation fulcrum, it performs four rotations in the direction of arrow Y in Figure 1.

In FIG. 1, when the movable part A of the actuator ACT performs four rotations around its rotational fulcrum, the four rotations of the movable part A cause the support body F of the signal scanner In order to show that the signal scanner also performs four rotational movements, the support part F of the signal scanner is shown as one that performs four rotational movements directly around the rotational fulcrum G. A pictorial explanation of the construction principle of a signal scanner assembly is provided.

Reference numerals 20 to 22 are pivots installed in the support portion F of the signal scanner assembly, and 23 is a pivot of the signal scanner screwed into the support portion F of the signal scanner assembly described above. Support member C! ! : This is a pivot for JIvi. Further, 24.25 is the support part F of the signal scanner assembly mentioned above.
It is a permanent magnet buried in the

The magnetic head support member ch has a wall portion 28 at its rear end.
A pivot hole 30.31 is formed in the support member Cs of the regenerating needle, and a pivot hole 33.33 is formed in the wall 29 at the rear end of the support member Cs for the regenerating needle. Pivot receiving holes 30, 31 bored in the wall 28 at the rear end of the support member ch receive the pivots 20, 21 implanted in the support part F of the signal scanner assembly. A pivot receiving hole 32 bored in the wall 29 at the rear end of the needle support member Cs receives the pivot 22 implanted in the support part F of the signal scanner assembly, and also receives the pivot 22 implanted in the support part F of the signal scanner assembly. A pivot receiving hole 33 bored in the wall 29 at the rear end of the support member C3 is configured to receive the pivot 23 for adjusting the position of the support member Cs of the regenerated needle.

Further, a permanent magnet 26 is attached to the wall portion 28 at the rear end of the support member ch of the magnetic head at a position facing the permanent magnet 24 embedded in the support portion F of the signal scanner assembly described above. On the other hand, on the rear end wall 29 of the support member C3 of the regenerating needle, there is a permanent magnet 2 at a position facing the permanent magnet 25 embedded in the support part F of the signal scanner assembly described above.
7 is installed.

Therefore, the pivots 20 and 2 embedded in the support part F of the signal scanner assembly are inserted into the pivot holes 30 and 31 formed in the wall part 28 at the rear end of the support member Ch of the magnetic head.
Insert the tip of No. 1 again.

The pivot 22 and the regenerated needle support are implanted in the support part F of the signal scanner assembly in the pivot holes 32 and 33 bored in the rear end wall 29 of the regenerated needle support member Cs. When the tip of the member C is inserted with the pivot 23 for position adjustment, the support member ch of the magnetic head is inserted into the wall 2 of the rear end of the member C.
8 and the permanent magnet 24 embedded in the support part F of the signal scanner assembly, the support member c of the magnetic head is
h and the support portion F of the signal scanner assembly are mechanically connected 4
Furthermore, the support member Cs of the regenerating needle has a permanent magnet 27 provided on the wall portion 29 at the rear end thereof, and a permanent magnet 25 embedded in the support portion F of the signal scanner assembly. Due to the magnetic attraction force generated during this period, the supporting member Cs of the regenerating needle and the supporting body portion F of the signal scanner assembly are mechanically connected to each other.

In this way, the magnetic head support member ch described above,
It is removably connected to the support part F of the signal scanner assembly, and the support member Cs of the regenerating needle is removably connected to the support part F of the signal scanner assembly. There are 4 combinations.

As mentioned above, for the support part F of the signal scanner assembly,
In a state where the support member ch of the magnetic head and the support member Cs of the reproduction needle are connected together.

By adjusting the screwing degree of the pivot 23 for m:i* of the support member Cs of the regenerated needle implanted in the support body part F of the signal scanner assembly, the support member Cs of the regenerated needle is adjusted to the position of the pivot 23.
By rotating with the tip of 2 as the center of rotation,
The distance between the magnetic head H fixed to the tip of the support member Ch of the magnetic head and the reproduction needle S fixed to the tip of the support member Cs of the reproduction needle is determined by the support part of the signal scanner assembly. It can be changed depending on the degree of screwing of the pivot 23 for adjusting the position of the support member Cs of the regenerated needle implanted in F.

Therefore, the distance between the magnetic head H fixed to the tip of the support member ch of the magnetic head and the reproduction needle S fixed to the tip of the support member Cs of the reproduction needle is determined by the support of the signal scanner assembly. By adjusting the degree of screwing of the pivot 23 for position adjustment of the support member Cs of the regenerated needle implanted in the body part F, an appropriate distance as shown in FIG. 3, that is, rotation recording can be achieved. It is easy to accurately adjust the interval between recording marks on the medium to N-TP, which is an integral multiple of the interval TP.

In FIG. 3, H is a magnetic head, S is a reproducing needle, 2 is an electrode, 3 is a magnetic thin film, D is a rotating recording medium, p,
p... is a bit of tracking information.

In the description of the embodiments so far, a case has been described in which a magnetic head H and a reproducing needle S are used as the signal scanners, but it goes without saying that magnetic heads may be used as each of the two signal scanners. Moreover, instead of a flat plate-shaped one, a five-cylindrical one may be used as the one-rotation recording medium.

The support member C of the signal scanner may be made by bending a thin metal plate, for example.

The support member C of the signal scanner shown in FIG. 1 and the support member ch of the magnetic head shown in FIGS. 4(a) and 6, etc. are thin metal plates. This is an example of a case where it is made by bending. First, in Figure 4 (a
), H is a magnetic head fixed to the tip of the support member Ch of the magnetic head', and this magnetic head H is attached to the mounting piece 34 of the support member Ch of the magnetic head in a predetermined manner. Head support member c
It can be fixed to h. In (a) of Figure 4, 3
0.31 is a pivot hole provided at the rear g128 of the support member ch of the magnetic head, 20.21 is a conical pivot, and 24.26 is a permanent magnet.

Further, 35 is an electromagnet that operates to pull up the support member ch of the magnetic head.

Among the pivot receiving holes 30 and 31 described above, one 31 has a circular planar cross-sectional shape, and the other one 30 has a planar cross-sectional shape similar to the two pivot receiving holes 3 described above.
It has an elongated shape with a large length in the direction of the straight line connecting the points 0 and 31.

Next, the support member Ch of the magnetic head shown in FIG. A permanent magnet 26 is fixed to the back side of a coupling plate 37. In Fig. 5, 24 is a permanent magnet;
0.21 is the pivot, and 30.31 is the pivot hole.

The support member ch of the signal scanner shown in FIGS. 6(a) and (b) is an example of a different configuration made by bending a thin metal plate. At the tip of the magnetic head support member ch shown, the magnetic head H is fixed to a mounting piece 34 in a predetermined manner by adhesive, and near the rear end of the magnetic head support member Ch. A pivot receiving hole 38 and a pivot receiving groove 39 are provided in the side wall.
The tips of the conical pivots 24 and 26 are engaged with each other.

In the support member ch of the signal scanner shown in FIGS. 6(a) and (b), the pivot 20.21 and the pivot receiving hole are engaged from the side of the support member ch of the magnetic head. Since the engagement mode is such that the pivot 20.
There is an advantage that the engagement between 21 and the pivot receiver is difficult to disengage. The angle θ shown in FIG. 6(b) indicates the relationship between the angles of each part.

In FIG. 6(C), 40 is a coating layer of a vibration absorber, and this coating layer 4o of a vibration absorber may be constructed using, for example, a known adhesive that becomes rubber-like after curing. The magnetic head support member ch coated with such a coating layer 40 of a vibration absorber can operate without causing abnormal vibrations even when it is driven by the 7 actuator ACT. Can be done.

Next, a configuration example of the actuator ACT will be described with reference to FIG. 2. The actuator ACT shown in FIG. 2 moves a signal scanner that slides against a rotating recording medium to record/reproduce signals, or in the direction in which the recording traces extend. The signal scanner is configured to be driven and displaced in two directions, including orthogonal directions.

In this actuator ACT, A is the overall symbol of the movable part of the actuator, B is the overall symbol of the DC magnetic field generating part of the actuator, and the movable part A is the entire symbol of the movable part of the actuator.
1.42... is fixed to the center vertical portion of the support plate 43 via a connecting member 44 made of an elastic body (for example, rubber), and supported by an elastic plate such as a phosphor bronze plate. It is connected and fixed to the central vertical portion of the member 45.

A rotation fulcrum is set by a rotation fulcrum member 46 (a plurality of rotation fulcrum members 46 are provided at intervals in the vertical direction).

Both ends of the support member 45 described above are sandwiched between rubber-like supports 47a and 47b, and the support member 45 can be easily bent in the front-rear direction, but does not deform in other directions. ,therefore.

Displacement of the movable part A in the front-rear direction is easily performed by the support member 45, and the rotational movement of the movable part A is easily performed because the straight line position connecting the apexes of the rotation fulcrum member 46 serves as the rotation axis. 458° 45b in the figure is a through hole in the support member.

The thickness of the connecting member 44 in the front-back direction is slightly smaller than the length of the rotation fulcrum member 46 in the front-back direction.
After connecting and fixing them by the connecting member 44, the rotation fulcrum member 46 is inserted into the gap between the support plate 43 and the support member 45.
If you insert .

The connecting member 44 is in an expanded state, and its contractile force causes the support plate 43 to be properly pressed against the apex portion of the rotation fulcrum member 46.

F is a connecting rod 47.4 fixed to the support member 43 mentioned above.
This is the support part of the signal scanner assembly which is fixed to the tip of the signal scanner assembly 8, and three pivots 20 to 23 are implanted in the support part F of this signal scanner assembly, and one A pivot 23 for adjusting the position of the support member of the signal scanner is screwed into the shaft.

Also, two permanent magnets 24 and 25 are buried.

The above-mentioned permanent magnets 24 and 25 are provided on the support part F of the signal scanner assembly, and the permanent magnets 26 are provided on the rear end wall of the support member (cantilever) C of the signal scanner. .27 refers to an urging force for mechanically coupling the support part F of the signal scanner assembly and the support member C of the signal scanner by the magnetic force generated between the above-mentioned permanent magnets, and a signal scanning force. A contact pressure is generated to bring the child into contact with the rotating recording medium with a predetermined contact pressure.

The support member C of the signal scanner in the state where the support member C of the signal scanner and the support body part F of the signal scanner assembly are integrated is the permanent magnet 24 (25) and the permanent magnet 26 described above. (27) If you pull it forward against the magnetic attraction force acting between it.

The support member C of the signal scanner and the support portion F of the signal scanner assembly can be easily separated.

By the way, the DC magnetic field generating section B in the above-mentioned actuator ACT consists of an outer magnetic path 49, a pole piece 50, permanent magnets 51, 52, etc., and the tip of the pole piece 50 is divided into two parts 50a and 50b. The coil 41 of the movable part A described above is loosely fitted into the pole piece 50o so that one side of the coil 41 is present in the magnetic gap formed between the permanent magnet 51 and the pole piece 50a. The coil 42 of the movable part A is fitted onto the pole piece 50b so that one side of the coil 42 exists in the magnetic gap formed between the permanent magnet 52 and the pole piece 50b.

The permanent magnets 51, 52 are connected to direct current in such a state that a magnetic field is generated in the magnetic gap between each of them and the opposing pole pieces 50a, 50b, and no magnetic field is generated between the pole pieces 50a, 50b. It constitutes a magnetic field generating section B and is magnetized in a manner that it is a strand.

The coils 41 and 42 of the movable part A in the actuator ACT having the above-mentioned configuration are caused by an electromagnetic force generated between the current supplied thereto and the magnetic field of the magnetic gap in the DC magnetic field generating part B.

It is driven and displaced in the direction of the coil axis (X direction).

The respective coils 41 . 42 are driven in the same direction and with the same driving force.
When a current is supplied to 42, the movable part A moves the signal scanner fixed to the support member C of the signal scanner which is integrated into the support part F of the signal scanner assembly. is the extension direction of the recording trace on the rotating recording medium (X direction),
Namely.

When a current is supplied to each of the coils 41, 42 so that the coils 41, 42 are displaced in the direction of correcting the time axis error, and the coils 41, 42 described above are driven in the same direction and in opposite directions with the same driving force. The movable part A rotates about the Z axis as a rotation wheel, and the signal scanner is fixed to the support member C of the signal scanner, which is integrated with the support part F of the signal scanner assembly. of.

It is displaced in the direction (Y direction) perpendicular to the direction of extension of the recording trace on the rotating recording medium, that is, in the direction of correcting the tracking error.

(Effects) As is clear from the above detailed explanation, the signal scanner assembly for a rotating recording medium of the present invention is capable of reproducing at least information signals by slidingly contacting the rotating recording medium. 1st. A signal scanner assembly for a rotating recording medium that includes a second signal scanner, the first signal scanner supporting member having the first signal scanner fixed near one end thereof. The other end of the second signal scanner support member having the second No. 18 scanner fixed to the vicinity of one end is connected to the other end of the member. Displacement drive mechanism of the signal scanner via each individual contact pressure applying QW so that the interval between the second signal scanners is an integral multiple of the interval between recording marks to be recorded on the rotating recording medium. A signal scanner assembly for a rotating recording medium connected to a common movable part in.

and a first. A signal scanner assembly for a rotating recording medium that includes a second signal scanner, the first signal scanner supporting member having the first signal scanner fixed near one end thereof. The other end of the signal scanner is connected to the other end of the second signal scanner support member, to which the second signal scanner is fixed near one end, through separate contact pressure applying mechanisms. It is connected to a common movable part in the displacement drive mechanism, and the distance between the first and second signal scanners is set to be an integral multiple of the interval between the marks to be recorded on the rotating recording medium. The signal scanner assembly for a rotating recording medium of the present invention is a signal scanning element assembly for a rotating recording medium which is provided with means for adjusting.

The two signal scanners are driven and displaced by a common actuator so that the interval between the two signal scanners is an integral multiple of the interval between recording marks to be recorded on the rotating recording medium. Since the two signal scanners are each connected to the actuator via an individual contact pressure applying mechanism, the two signal scanners are driven and displaced by the actuator by the individual signal scanner support members, and the respective signal scanners are A predetermined low contact pressure is applied to the rotating recording medium by the magnetic force of a permanent magnet, and the interval between the two signal scanners, which are driven and displaced by a common actuator, is adjusted for adjustment. By moving the pivot in and out, it is possible to easily set the recording traces to be recorded on the rotating recording medium so that the interval is an integral multiple of the recording trace interval.1 According to the present invention, all the problems of the conventional low-speed recording medium can be satisfactorily solved. can.

[Brief explanation of drawings]

, FIG. 1 is a plan view from the back showing a part of the signal scanner assembly for a rotating recording medium in cross section to explain the principle of construction of the signal scanner for a rotating recording medium according to the present invention. , FIG. 2 shows a state in which the signal scanner assembly for a rotating recording medium shown in FIG. FIG. FIG. 3 is a perspective view showing the relative relationship between the recording trace of the rotating recording medium and the signal scanner, FIG. 4 is a diagram showing an example of the configuration of a part of the signal scanner assembly, and FIG. 5 is a magnetic head. FIG. 5(a) is a perspective view of a single-type recording/reproducing element including a magnetic head and electrodes; FIG. FIG. 5(b) is a plan view showing a sliding surface in the magnetic head portion of a single type recording/reproducing element equipped with the magnetic head and electrodes shown in FIG. 5(a), and FIG. 1 is a diagram illustrating a conventional signal scanner assembly in which a signal scanner for reproducing tracking information and a signal scanner for reproducing an information signal to be recorded and reproduced are each configured separately, FIG. 7 is an explanatory diagram for explaining the problems of the conventional signal scanner assembly. DESCRIPTION OF SYMBOLS 1... Magnetic gap, 2... Electrode, 3... Thin layer made of ferromagnetic material [4, 5... Ferrite core, 6-8...
・Parts made of glass, 9.10...Coil, 11
... Lead wires to coils 9 and 10, 12 ... Electrode 2
Lead wire connected to TW...Track width, E
W: electrode width, 2a: tip of electrode 2, H: magnetic head. S: Electrode needle (regeneration needle) for detecting changes in capacitance value. TP..., record trace interval, 14.18... bifurcated cantilever, 15.16.19... damper made of elastic material, 17... movable part in actuator ACT. D... Rotating magnetic recording medium, P, P... bit, Ch
. . . magnetic head support member, Cs .
. . . A pivot embedded in the support portion F of the signal scanner assembly, 23 . . . A support member C of the signal scanner screwed onto the support portion F of the signal scanner assembly described above. Pivot for position adjustment, 24-27, 51.52... Permanent magnet, 28... Wall portion at rear end of magnetic head support member ch, 29... Rear end of playback needle support member C3 wall%3
1 to 33. 38... Pivot receiver hole, 39... Pivot receiver is groove, 40... Vibration absorber coating layer, A... Overall symbol of movable part of actuator, B is DC magnetic field of actuator Overall code of the generating part, 41. 42... Coil, 43... Support plate, 44... Connecting member, 45...
- Support member, 46... rotation fulcrum member. 47a, 47b-Support body, 45g, 45b-Through hole in support member, 47, 48... Connection rod fixed to support member 43, B... DC magnetic field generation part in actuator ACT, 49... Outer magnetic path, 50...pole piece. Mae Etaku 2 (to) (b) E5n

Claims (1)

[Claims] 1. Signal scanning for a rotating recording medium, which includes first and second signal scanners that can slide into sliding contact with the rotating recording medium and reproduce at least an information signal. A child assembly, the other end of which is a first signal scanner support member having the first signal scanner fixed to the vicinity of one end, and the second signal scanner having the second signal scanner fixed to the vicinity of the one end. The distance between the first and second signal scanners is an integral multiple of the interval between the recording marks to be recorded on the rotating recording medium. As a first signal scanner, the signal scanner assembly 2 for a rotating recording medium is connected to a common movable part in the displacement drive mechanism of the signal scanner through individual contact pressure applying mechanisms. Using a magnetic head,
Signal scanner assembly 3 for a rotating recording medium according to claim 1, using a regeneration needle with an electrode as the second signal scanner, the first signal scanner and the second signal scanner A signal scanner assembly 4 for a rotating recording medium according to claim 1, using a magnetic head in the signal scanner assembly 4, provided at a connecting portion between the signal scanner and a movable part in a displacement drive mechanism for the signal scanner. According to claim 1, the contact pressure applying mechanism includes a coupling mechanism using a pivot and a pivot bearing, and an urging means using magnetic force generated between a plurality of permanent magnets. A signal scanner assembly 5 for a rotating recording medium, comprising first and second signal scanners that can slide into sliding contact with the rotating recording medium and reproduce at least information signals. A signal scanner assembly for a medium, comprising: a first signal scanner supporting member having the first signal scanner fixed near one end; The other end of the second signal scanner support member fixed near one end is connected to the common movable part of the signal scanner displacement drive mechanism through individual contact pressure applying mechanisms, and A signal scanner for a rotating recording medium, which is provided with means for adjusting the interval between the first and second signal scanners to be an integral multiple of the interval between recording marks to be recorded on the rotating recording medium. Assembly 6, using a magnetic head as a first signal scanner, and
Signal scanner assembly 7 for a rotating recording medium according to claim 5, using a regeneration needle with an electrode as the second signal scanner, the first signal scanner and the second signal scanner A signal scanner assembly 8 for a rotating recording medium according to claim 5, which uses a magnetic head in the signal scanner assembly 8, is provided at a connecting portion between the signal scanner and a movable part in a displacement drive mechanism for the signal scanner. According to claim 5, the contact pressure applying mechanism includes a coupling mechanism using a pivot and a pivot bearing, and an urging means using magnetic force generated between a plurality of permanent magnets. The signal scanner assembly 9 for a rotating recording medium is configured such that the distance between the first and second signal scanners is an integral multiple of the interval between the recording marks to be formed on the rotating recording medium. The means for adjustment is by adjusting the amount of movement in the length direction of the pivot in the contact pressure applying mechanism provided at the connection part between the signal scanner and the movable part of the displacement drive mechanism of the signal scanner. Signal scanner assembly for a rotating recording medium according to claim 5 used