JPS62259271A - Assembling body for signal scanner - Google Patents

Abstract

PURPOSE:To optionally adjust the contact pressure of a magnetic head, to easily assemble a signal scanner, to reduce the cost and to attain highly accurate adjustment by engaging two pipots to be the 2nd member with a pipot receiving member to be the 1st member and mechanically coupling these members through a magnet. CONSTITUTION:A pipot receiving through hole 32 formed on the back end part of a member C to which a magnetic head H is loaded at its leading end part and a V-groove 62 are engaged with pipots 34, 35 formed on a member E. The members C, E are mechanically coupled by permanent magnets 36, 38 fitted to the members C, E respectively. When the center line positions of the magnets 36, 38 are vertically shifted by DELTAl, attractive force acts in the direction making the center lines of both the magnets coincide with each other, so that the head presses a recording medium surface properly. Thereby, the attachment/detachment of both the members is easy and both members are not peeled due to shock or vibration and the contact pressure of the magnetic head can be optionally adjusted by using the magnets with low cost and high accuracy.

Description

Detailed Description of the Invention (Industrial Application Field) Signal recording performed on a rotating recording medium by applying various recording and reproducing methods, and signal scanning used for reproducing signals from a single-rotating recording medium. Regarding child assemblies.

(Prior Art) A recording/reproducing apparatus configured to apply various recording/reproducing methods to record information signals on a disc-shaped or cylindrical rotating recording medium, and to reproduce the recorded information signals is known. As is well known, it has been widely used for recording and reproducing various information signals.

In recent years, in order to meet the demand for high-density recording and reproducing, recording and reproducing elements that are driven and displaced by a closed-loop tracking control system are used to record traces that are formed at minute intervals on recording media. It has also started to be possible to trace such signal scanners.

FIGS. 20 and 21 show a signal scanner assembly including a signal scanner that slides into contact with the recording medium surface of a rotating recording medium to record and reproduce signals, and an extension of a recording trace. FIG. 2 is a perspective view of a conventional device coupled to an actuator configured to drive and displace a signal scanner in two directions: a direction in which the signal is scanned, and a direction perpendicular to the direction in which the recording trace extends; In FIGS. 20 and 21, A is the general symbol of the movable part of the actuator, and B is the general symbol of the DC magnetic field generating part of the actuator.

In the conventional device shown in FIGS. 20 and 21, the movable part A is made of an elastic material (e.g., rubber ) is connected and fixed to the central vertical portion of the support member 12 made of an elastic plate such as a phosphor bronze plate, and the rotation fulcrum member 15 (separated from each other in the vertical direction) A rotation fulcrum is set by a plurality of plates). The support member 12 described above has supports 13a and 13 whose surface ends are made of rubber.
The support member 12 is easily bent in the front-back direction, but not deformed in other directions. Therefore, the support member 12 easily allows the movable portion A to be displaced in the front-back direction. Moreover, the rotational movement of the movable part A is easily performed with the straight line position connecting the apexes of the rotational fulcrum member 15 serving as the rotational axis, and the movement in other directions is performed by pressing. 12a and 12b are through holes in the support member.

The thickness of the above-mentioned connecting member 14 in the front-rear direction is made slightly smaller than the length of the rotation fulcrum member 15 in the front-back direction, so that the support plate 3 of the movable part A and the support member 12 are connected by the connecting member 14. After they are fixed, if the rotation fulcrum member 15 is inserted into the gap between the support plate 3 and the support member 12, the connection member 14 will be in an extended state, and the support F13 will rotate well due to its contractile force. It is press-fitted to the apex portion of the dynamic fulcrum member 15.

In the conventional device shown in FIG.

Rubber dampers 5a and 5b are fixed to the support plate 3, and the bases of the two-pronged cantilever 6 are fitted into the rubber dampers 5a and 5b. When the signal scanner 7 contacts the surface of the rotating recording medium, it is brought into contact with the surface of the recording medium for one rotation with a predetermined contact pressure due to the vertical elasticity of the rubber dampers 5a and 5b. It is done like this.

Furthermore, in the conventional individual packaging shown in FIG.
A permanent magnet is fixed near the center of the holder 24, which is provided so as to connect the proximal ends of the cantilevers 6a and 6b.
bL is the pivot 20a.

20b, the two permanent magnets 23, 24 are attracted to each other through the magnetic gap, and each leg 6a of the cantilever 6.

Pivot the tips 6al and 6bL of 6b to the pivots 20a and 20
Press it against b.

The DC magnetic field generating part B in the actuator consists of an outer magnetic path 8, a pole piece 9, a permanent magnet 10, 11, etc. The tip of the pole piece 9 is divided into two parts 9a and 9b, and the movable The coil l of part A is loosely fitted into the pole piece 9a so that one side thereof is present in the magnetic gap formed between the permanent magnet 10 and the pole piece 9a, and the coil l of the movable part A described above is 2 is loosely fitted into the pole piece 9b such that one side thereof is present in the magnetic gap formed between the permanent magnet 11 and the pole piece 9b.

The permanent magnets 10 and 11 are connected to a DC current that generates a magnetic field in the magnetic gap between each magnet and the opposing pole pieces 9a and 9b, and does not generate a magnetic field between the pole pieces 9a and 9b. It constitutes a magnetic field generating section B and is magnetized in a manner that it is a strand.

In the actuator configured as described above, the coils 1 and 2 of the movable part A move the coil axis due to the electromagnetic force generated between the current supplied to them and the magnetic field of the magnetic gap in the DC magnetic field generating part B. Although the coils 1 and 2 are driven and displaced in the direction (X direction), a current is supplied to each of the coils 1 and 2 so that the coils 1 and 2 are both driven in the same direction with the same driving force. If the movable part A
The signal scanner 7 attached to the cantilever 6 is rotated in the direction of extension of the recording trace on the recording medium (X direction).

In other words, the time axis system is displaced in the direction of correcting the difference, and
When current is supplied to each of the coils 1 and 2 so that the coils 1 and 2 described above are driven in the same direction and in opposite directions with the same driving force, the movable part A rotates around the Z axis. The signal scanner 7 attached to the cantilever 6 rotates as shown in FIG.
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.

By the way, in the conventional example device shown in FIG.

Since the base of the cantilever 6 is connected to the movable part A of the actuator by the rubber dampers 5a and 5b, the resonance of the mechanical resonance system constituted by the cantilever 7 and the rubber dampers 5a and 5b causes the signal scanner to Twisting and vibration may occur, leading to poor tracking control operation, and if the loop gain of the tracking control system is increased, there is a risk of oscillation in the high range. When a rubber damper is used, a problem arises in that the contact pressure of the signal scanner against the surface of the recording medium increases during one revolution, causing damage to the surface of the recording medium.

Other rubber dampers used as component parts include:
It has poor temperature characteristics, environmental resistance, chemical resistance, etc., and also lacks stability due to large changes over time1.
Since the positioning accuracy is poor, the contact accuracy of the signal scanner cannot be maintained, and furthermore, it is difficult to maintain the positioning accuracy when replacing the cartridge.

Furthermore, since the conventional device shown in FIG. 21 does not use a rubber damper, the problems described in the conventional device shown in FIG. 20 do not occur.
The conventional device shown in Figure 1 uses a cantilever with a complicated configuration that is expensive to manufacture, such as requiring a conical pivot to be accurately aligned and press-fitted to the base end of the cantilever 6. However, since the cantilever 6 is a consumable item, it has been desired to provide a cantilever that is simple in construction and inexpensive. Moreover, the bearing for the pivot described above is expensive because it requires complicated processing, which also poses a problem in terms of reducing the cost of the device.

In order to solve the various problems in the conventional devices shown in FIGS. 20 and 21, Ippondereijin Co., Ltd. first developed a signal scanner assembly as shown in FIGS. 22 and 23. That is, a first member C equipped with a signal scanner to be brought into contact with the recording medium surface of a rotating recording medium with a predetermined contact pressure, and a second member C to which the above-mentioned member C of 'f51 is detachably connected. In the signal scanner assembly comprising a member E, the second member E has two pivots 34.
．． 35, and the first member C has two pivots 34.35 provided on the second member E.
Pivot receiving holes 32.
33, and a magnetic field provided in each of the first member C and the second member E as a biasing force for mechanically coupling the first member C and the second member E. A signal scanner assembly has been proposed that uses the magnetic force generated between the generating members 36 and 38.

In the previously proposed signal scanner shown in FIGS. 22 and 23, C is the first member in the signal scanner assembly, and E is the second member in the signal scanner assembly. The first member C and the second member E described above are each constructed as separate members, and the first member C is detachably attached to the second member E. There is.

The signal scanner assembly shown in FIG.
This is an example of a configuration using a thin metal plate made by bending. In FIG. 22, H is fixed to the tip of the first member C in the signal scanner assembly. This is a magnetic head. This magnetic head H can be fixed to the first member C in a predetermined manner by adhering it to the mounting piece 30 on the first member C.

In the first member C, in its rear wall 31, a through hole 32 for receiving a pivot is provided for engaging a conical pivot 34, 35 provided in the second member E of the signal scanner assembly. 33 are drilled. Among the through holes 32 and 33, one 32 has a circular planar cross-sectional shape, and the other one 33 has a planar cross-sectional shape that is a straight line connecting the two pivots 34 and 35. It is said to have an elongated shape with a large length in the direction of . In FIG. 22, reference numeral 48 denotes a coating layer of a vibration absorber, and for this vibration absorber coating 548, for example, a known adhesive that becomes rubber-like after curing is used.

36 is a permanent magnet, and this permanent magnet 36 is fixed to a mounting plate 37 provided near the rear end of the first member C. Further, a permanent magnet 38 is fixed to the second member E.

The manner of coupling the second member E and the first member C described above is such that the two conical pivots 34 and 35 of the second member E are provided on the first member C. By inserting into the pivot receiving holes 32, 33, the vicinity of the tip of the conical pivot 34° 35 is formed in the first member C.
The first member C and the second member E are connected in a state where they are engaged with the edge of the permanent magnet 36 provided on the first member C. , second member E
By magnetically attracting each other through a gap between the permanent magnets 38 provided in , 33 as the center of rotation, the distal end portion of the first member C rotates in the direction of arrow 40 in FIG. 22, and is mechanically and integrally connected in a suspended state. .

Furthermore, by exciting the electromagnet indicated by the reference numeral 39 in FIG. 22, the electromagnet 39 moves the permanent magnet 36 in the first member C in a direction that moves the magnetic head H away from the surface of the rotating recording medium. The first member C can be rotated upward by suction.

Further, in the configuration example shown in FIG. 23, the first member C in the signal scanner assembly is connected to the base of a pipe 50 (for example, an aluminum pipe) made of a suitable material to a coupling plate 50.
1, a permanent magnet 36 is fixed to the back side of the coupling plate 51 described above, and a magnetic head H is fixed to the tip of the pipe 50 described above. The second member E of the child assembly is the substrate 52
It is constructed by attaching two pivots 35, 36 and a permanent magnet 38 to the.

In the previously proposed signal scanner described with reference to FIGS. 22 and 23, the first member C in a state in which the first member C and the second member E are integrated, It is pulled forward against the magnetic attraction force acting between the permanent magnet 36 provided on the first member C and the permanent magnet 38 provided on the second member E. For example, the first member C can be easily separated from the second member E.

Therefore, the first member C, which is a consumable item, can be replaced extremely easily, and because the first member C, which is a consumable item, is engaged with the second member E, The structure of the first member E is only provided with a circular hole and an elongated hole that can engage with the vicinity of the tip of the conical pivot provided in the second member E.
The member C can be manufactured at low cost.

(Problems to be Solved by the Invention) In the previously proposed signal scanners described with reference to FIGS. 22 and 23, the conventional signal scanners described with reference to FIGS. However, with the previously proposed signal scanner, vibrations and shocks are applied to the device from the outside,
Or if the device falls, the first member C and the second
The problem was that the connection with member E was separated.

In order to solve the above problem, the pivot receiving holes 32 and 33 formed in the first member C may be made larger; If this were done, the state of engagement between the pivots 34 and 35 and the pivot receiving holes 32 and 33 would deviate greatly from the state of point contact, and the four rotational movements would not be performed smoothly. Therefore, a good solution to the above-mentioned problems has been awaited.

(Means for Solving the Problems) The present invention provides a first member including a signal scanner that is to be brought into contact with a recording medium surface of a rotating recording medium with a predetermined contact pressure, and the first member described above. the second to be removably coupled;
In the signal scanner assembly, the second member is provided with two pivots, and the end portion of the first member to which the signal scanner is attached and The above-mentioned second part is attached to both sides of the opposite end.
In addition to providing an engaging portion for receiving a pivot corresponding to each of the two pivots provided on the member, the member serves as an urging force for mechanically coupling the first member and the second member. The present invention aims to solve the problems of the previous proposals by providing a signal scanner assembly that uses the magnetic force generated between the magnetic field generating members provided in the first member and the second member, respectively. It was a good thing.

(Embodiments) Hereinafter, specific details of the signal scanner assembly of the present invention will be explained in detail with reference to the accompanying drawings. In the description of the embodiments below, a case where a magnetic head is used as a signal scanner is given as an example, but when implementing the signal scanner assembly of the present invention, the signal scanner used is Of course, a signal converter other than a magnetic head may be used as the magnetic head.

FIG. 1 is a perspective view of one embodiment of the signal scanner assembly of the present invention, in which C is the first member in the signal scanner assembly, and E is the signal scanner assembly. A second member of the assembly, the first member C and the second member E described above are each configured as separate members,
The first member C is detachably attached to the second member E.

The signal scanner assembly shown in FIG. This is an example in which a die is punched into the shape shown in the developed view in figure (a) and then bent. ) is a back view of the product shown in the exploded view of Fig. 4(a), which has been bent, and Fig. 4(c) is shown in Fig. 4(b). FIG. 4(d) is a rear view seen from the direction of arrow U shown in FIG. 4(b).

In FIG. 1, H is a magnetic head fixed to the tip of the first member C in the signal scanner assembly. can be attached to the first member C in a layer-wise manner.

The first member C has through holes in its side walls 60.61 for receiving pivots for engagement with conical pivots 34,35 provided in the second member E of the signal scanner assembly. 32 and a V-shaped groove (V groove) 62 are provided. The above-mentioned V groove 62 has a V-shaped planar cross-section, an inner end thereof is used for engagement with the conical pivot 35, and an outer end thereof is open to the outside. Since the V-groove 62 is in the state shown in FIG. Through hole 32 and V-shaped groove (V groove) 6
2 to help facilitate the coupling operation when mechanically coupling the first member C and the second member E.

The first hole in which the above-mentioned pivot receiving hole 32 is bored.
side W60 in member C, and a second side W60 in which a pivot 34 that is engaged with the pivot receiving through hole 32 is implanted.
The side wall 61 of the first member C, in which the V-groove 62 for pivot receiving is formed, is parallel to the side surface 63 of member E, and the side wall 61 of the first member C, in which the V-groove 62 for pivot receiving is formed, is connected to the V-groove 62 for pivot receiving. Since the pivot 34 to be mated is parallel to the side surface 64 of the second member E on which it is implanted, the two conical pivots 34 and 35 in the second member E are parallel to each other. is the side g1 of the first member C
The conical pivot 35 is inserted into the pivot receiving through hole 32 provided at the rear of the first member C in the correct position. In this state, the vicinity of the tips of the two conical pivots 34 and 35 described above are connected to the pivot 1-receiving through hole 32 provided in the first member C. The first member C and the second member E are connected by engaging with the edge of the V-groove 62 for receiving the pivot.

When the first member C is made by bending a thin metal plate, as shown in Fig. 1, the first member C is bent to absorb mechanical vibrations. It is a desirable embodiment to apply a vibration absorber to the back surface, and FIG. 3 is a diagram illustrating a case where a vibration absorber is applied to the back surface of the first member C. indicates a coating layer of vibration absorber. This vibration absorbing agent coating layer 48 is as follows.

For example, it can be constructed using a known adhesive that becomes rubber-like after curing.

In FIG. 1, 36 is a permanent magnet, and this permanent magnet 36 has a pin 67 embedded in a mounting plate 37 provided near the rear end of the first member C, which is bored in the center of the permanent magnet. By inserting it into the hole in the hole, it is fixed with its mounting position regulated. Further, a permanent magnet 38 is fixed to the second member E.

The second member E in the signal scanner assembly is fixed to the movable part A of the actuator provided in the transfer part of the signal scanner in the recording/reproducing apparatus, as illustrated in FIG. 19. Or.

Alternatively, the second member E and the first member C may be directly fixed to the signal transfer section of the recording/reproducing device. In either case, the manner of coupling the second member E and the first member C is as follows.
Two conical pivots 34 in the second member E.
35 is engaged with the pivot receiving through hole 32 and the V-groove 62 provided in both side walls Go and 61 of the first member C. Then, the permanent magnet 36 provided on the first member C and the permanent magnet 38 provided on the second member E magnetically attract each other through the gap, so that the first member C and the second member E are mechanically integrated in a vertically rotating state at the engagement portion between the pivot 34, 35, the pivot receiving through hole 32, and the pivot receiving V groove 62. They are connected.

In the state where the first member C and the second member E in the signal scanner assembly are mechanically coupled as described above, the pivots 34 and 35, the pivot receiving through hole 32, and the pivot receiving V The two permanent magnets 36 .
By determining the direction of the magnetic attraction force acting between the two permanent magnets 36 and 38 and appropriately setting the magnitude of the magnetic attraction force acting between the two permanent magnets 36 and 38, the magnetic head H is rotated to the surface of the recording medium. can be brought into contact with a predetermined contact pressure.

As described above, the magnetic head H is moved against the surface of the rotating recording medium at a predetermined contact pressure by the magnetic force acting between the permanent magnets 36 and 38 provided in the first member C and the second member E, respectively. In the case where the two permanent magnets 36 and 38 are brought into contact with each other, the relative arrangement of the two permanent magnets 36 and 38 is adjusted so that the magnetic head H attached to the tip of the first member C contacts the surface of the recording medium once. For example, as shown in FIG. 17, the two permanent magnets 36° 3
8 may be shifted by a predetermined distance Δa in the vertical direction. In FIG.
The p-line is the center line of the permanent magnet 36 fixed to the first member C, and the Q-Q line is the center line of the permanent magnet 38 fixed to the second member E.

FIG. 16 shows a state in which the magnetic head H attached to the tip of the first member C is not in contact with the surface of the rotating recording medium, and the two permanent magnets 36 and 38 described above are exerting their magnetic attraction force. This shows the case where the respective center lines coincide with each other like the o-0 line. 16th
When the tip of the magnetic head H shown in the figure comes into contact with the surface of the rotating recording medium and is displaced upward by ΔQ from the position in FIG. 16, the two permanent magnets 36.
The center lines P-P and Q-Q of 38 are ΔΩ as shown in Figure 17.
Therefore, in this state, due to the magnetic attraction force that acts between the two permanent magnets 36 and 38 in the direction of aligning their center lines,
The tip of the magnetic head H fixed to the first member C is
It will be pressed against the surface of the rotating recording medium.

When the first member C and the second member E are integrated, the side g160 of the first member C in which the pivot receiving through hole 32 is formed, and the pivot The side surface 63 of the second member E, in which the pivot 34 to be engaged with the receiving hole 32 is implanted, is parallel to the side surface 63 of the second member E. The side wall 61 of the member C is parallel to the side surface 64 of the second member E, in which the pivot 34 that is engaged with the pivot receiving V groove 62 is implanted, and the side wall 61 of the member C of The two conical pivots 34 and 35 are installed perpendicularly on each side of the second member E, so that the conical pivot 34 and the first
The pivot receiving hole 32 is inserted into the pivot receiving through hole 32 provided at the rear of the side wall 60 of the first member C, and the conical pivot 35 is provided at the rear of the first member C. 62, even if the first member C is pulled forward, the two will not separate, and therefore the present invention shown in FIG. In this signal scanner assembly, the first member C and the second member E will not be separated even by shocks or vibrations applied to the device from the outside.

Furthermore, the first member C and the second member E can be coupled and separated very easily due to the presence of the V-groove 62 provided in one side wall 61 of the first member C. That is, the pivot receiving engagement portion provided on the side wall 60.61 of the first member C to be engaged with the two conical pivots 34.35 of the second member E is 32 has a circular planar cross-sectional shape, but the other member 62 has a V-shaped planar cross-sectional shape, so the connection between the first member C and the second member E is difficult. The separation operation can be easily performed by using the V-groove 62 described above, and therefore,
The first member C, which is considered a consumable item, can be replaced extremely easily, and the first member C, which is considered a consumable item, does not need to be replaced for engagement with the second member E. The only configuration that can be achieved is that the second member E is provided with a circular hole and a V-groove that can engage with the vicinity of the tip of the conical pivot. can be manufactured at low cost.

FIG. 18 shows how the second member E in the signal scanner assembly shown in FIG. 18 is a diagram showing a state in which the first member C is fixedly fixed to the first member C. In FIG. 18, 39 is an electromagnet, and by passing a current through the electromagnet Since the member C is rotated upward in the figure, when the magnetic head H is to be separated from the recording medium, a current may be passed through the electromagnet 39.

Further, FIG. 19 is a diagram illustrating a case where the signal scanner assembly of the present invention is used in a recording/reproducing apparatus in which a cylindrical recording medium is used as a rotating recording medium. The cylindrical recording medium is driven and rotated at a predetermined number of rotations by a drive motor Md. 43 in FIG. 19 is a motor housing, and 44 is a support portion. The signal scanner assembly has a second member E secured to an actuator 46 attached to the transport body 45, and said actuator 46 is attached to the transport body 45.
is fixed to. The transfer body 45 is engaged with the feed screw 42 and the guide rod 41, and the rotational force of the transfer motor Mf is reduced by the reducer 47 to rotate the feed screw 42, thereby recording the signal scanner in a cylindrical shape. The medium is transported in the direction of the generatrix.

It goes without saying that the signal scanning element assembly of the present invention can be used satisfactorily even when the rotating recording medium is planar.

Next, FIG. 2 shows the permanent magnet 3 fixed to the mounting plate 37 of the first member C in the signal scanner shown in the first diagram.
6 and the permanent magnet 38 provided on the second member E are laterally shifted from the state in which they are facing each other, the magnetic attraction force between the two magnets 36 and 38 is The pivot 34 implanted in the second member E and the side wall 61 of the first member C are provided so that the first member C is also biased by the arrow 65 in FIG. FIG. 7 is a plan view from the back of the embodiment in which engagement with the pivot receiving through hole 32 is ensured.

In addition, FIG. 15 shows the mounting plate 3 of the first member C as described above.
7 and the permanent magnet 38 provided on the second member E are laterally shifted from the state in which they face each other, the permanent magnets 36. 15 is an explanatory diagram showing that the first member C is urged in the direction of the arrow 65 in the second WI due to the magnetic attraction between the permanent magnets 38 and 38, and in FIG.
K - is the center line of the permanent magnet 38, and -K is the center line J-J of the two permanent magnets 36 and 38 mentioned above, and -K is the 15th center line of the permanent magnet 38.
If the two permanent magnets 36, 38 are laterally offset by ΔL as shown in the figure,
This is because a magnetic attractive force acts in the direction of aligning -K with their center lines, 7-J and 7-J.

The first member C is biased in the direction of arrow 65 in FIG.
The pivot receiving through hole 32 provided on the side g161 of the member C is surely engaged.

Further, FIG. 5 shows that the V groove 62 provided on the side g161 of the first member C is formed on the side g161 of the first member C. ! 61 is a perspective view of an embodiment in which the structure is inclined with respect to the edge of the signal scanner assembly; FIG. 50 (for example, an aluminum pipe) is fixed to the coupling plate 51, and a permanent magnet 36 is fixed to the back side of the coupling plate 51, and further,
The magnetic head H is fixed to the tip of the pipe 50 described above, and both ends of the coupling plate 51 are bent, and a through hole 32 for a pivot reception and a V-groove 62 for a pivot reception are provided therein. As the second member E to be used in combination with the first member C described above, pivots 34 and 35 are implanted in the side walls 52a and 52b provided at both ends of the substrate 52, respectively. In addition, an embodiment in which the first member C and the second member E are combined to form a signal scanner assembly using a permanent magnet 38 attached to the substrate 52 described above. FIG.

In each of the embodiments described so far, the second member E
One of the pivot receiving engaging portions provided on the first member C to engage with the two pivots 34 and 35 installed in the first member C has a circular planar cross-sectional shape. The other one had a V-shaped groove in planar cross section, but the seventh
The embodiment shown in FIG. 8 and FIG. ! 60 and 61 are provided with through holes 32 and 33 each having a circular planar cross-sectional shape as an engaging portion for receiving a pivot.

First, in the embodiment shown in No. 7yi, the pivot to be engaged with one of the through holes 32 and 33 that are individually drilled on both sides 1160.61 of the first member C. (In the example shown in Figure 7, pivot 3
4) is configured to be urged outward by a spring 66, and in the embodiment shown in FIG. The parts Boa and 60b are made of leaf springs, and both side walls 60.6 of the first member C
The through holes 32 and 33 that are individually drilled in 1 are
Even if both holes have a circular planar cross-section, the relationship between the pivots 34 and 35 installed in the second member E and the through holes 32 and 33 bored in the first member C is The movement of joining and leaving is easy.

In each of the embodiments described so far, a permanent magnet is fixed to each of the first member C and the second member E in the signal scanner assembly, but as a magnet provided to the second member E, When an electromagnet is provided instead of a permanent magnet, the magnitude of the contact pressure of the magnetic head H against the surface of the rotating recording medium can be adjusted by changing the magnitude of the current supplied to the electromagnet.

In the embodiments described so far, the two pivot receiving engaging portions that engage with the two pivots 34 and 35 provided on the second member E are provided with through holes having a circular planar cross-sectional shape. ,
The first member C having grooves each having a V-shaped planar cross section has the advantage that it is extremely easy to attach and detach it to the second member E, but the signal scanner The problem is that when a large balancer is added to the assembly, the V-groove portion and the pivot may become disengaged. In order to solve the above problem, for example, changing the inclined V-groove 62 shown in FIG. Improvements can be expected, but as shown in FIGS. The above-mentioned problems can be solved satisfactorily by using the first member C, which has a through hole with a circular cross-sectional shape and a groove with a substantially L-shaped cross-sectional shape, as the joining part. .

In the signal scanner assembly shown in FIGS. 9 to 14,
Components corresponding to the signal scanner assembly described above with reference to FIGS. 1 to 6 include those shown in FIGS. 1 to 6.
The same drawing symbols as those used in the figures shall be used.

The signal scanner assembly shown in FIG. 9 uses a thin metal plate (for example, a thin plate of about 0.1 ia of metal such as aluminum, beryllium, titanium, phosphor bronze, etc.) as its first member C.
The 11th! ! ! This is an example in which a material is punched into the shape shown in the developed view as shown in FIG. 11(a) and then bent.
11(a) is a back view of the product shown in the exploded view of FIG. 11(a), which has been bent.
c) is a side sectional view taken along the line WW shown in FIG. 4(b).

FIG. 11(d) is a rear view seen from the direction of arrow U shown in FIG. 11(b).

In FIG. 9, H is a magnetic head fixed to the tip of the first member C in the signal scanner assembly. can be fixed to the first member C in any manner.

The first member C has a through hole in its side walls 60.61 for receiving a pivot for engaging a conical pivot 34.35 provided in the second member E of the signal scanner assembly. 32 and 62 approximately L-shaped grooves (L grooves) are provided. The above-mentioned L groove 62fi has an L-shaped planar cross-sectional shape, an inner end portion thereof is used for engagement with the conical pivot 35, and an outer end portion thereof is open to the outside. Since it is in the state, the above-mentioned L
The groove 62I2 connects the conical pivots 34 and 35 provided in the second member E of the signal scanner assembly to the pivot receiving through hole 32 provided in the first member C and the L-shaped groove (L groove) 62Q.

This serves to facilitate the coupling operation when mechanically coupling the first member C and the second member E.

The first hole in which the above-mentioned pivot receiving hole 32 is bored.
The side wall 60 of the member C and the second pivot 34 which is engaged with the pivot receiving through hole 32 are implanted.
The first member E is parallel to the side surface 63 of the member E, and is provided with the aforementioned L groove 62Q for receiving the pivot.
Since the side g161 of the member C is parallel to the side surface 64 of the second member E in which the pivot 34 that is engaged with the L groove 62 for receiving the pivot is implanted,
Two conical pivots 34 in the second member E.
The conical pivot 34 at 35 is a pivot receiving through hole 3 provided at the rear of the side u60 of the first member C.
2 in the correct position, and the conical pivot 35 is engaged in the correct position with the pivot receiving L groove 62Q provided at the rear of the first member C. In this state, the vicinity of the tips of the two conical pivots 34 and 35 are connected to the first member C.
The first member C and the second member E are connected by being engaged with the edge of the pivot receiving through hole 32 provided in the pivot receiving L groove 62Q. In addition, if the first member C is made by bending a thin metal plate like the one shown in 9th wI, 1
It is a desirable embodiment to apply a vibration absorber to the back surface of the first member C in order to absorb mechanical vibrations.

In FIG. 9, 36 is a permanent magnet, and this permanent magnet 36 has a pin 67 installed in #Ii on a mounting plate 37 provided near the rear end of the first member C. By inserting it into the hole provided, it is fixed with its mounting position regulated. In addition, the second member E
A permanent magnet 38 is fixed to the.

The second member E and the first member C are coupled together by connecting two conical pivots 34.35 of the second member E to both side walls 60.61 of the first member C. This is done by engaging the pivot receiving through hole 32 and the L groove 62Q. Then, the permanent magnet 36 provided on the first member C and the permanent magnet 38 provided on the second member E magnetically attract each other through the gap, so that the first member C and the second member E are:
The aforementioned pivots 34 and 35 and the through hole 32 for receiving the pivots
The L groove 62m for pivot receiving is mechanically and integrally connected to each other so as to be able to rotate in the vertical direction.

In the state where the first member C and the second member E in the signal scanner assembly are mechanically coupled as described above, M
The tip of the first member C rotates around the engagement portion between the pivot 34, 35, the pivot receiving through hole 32, and the pivot receiving L groove G2m, as indicated by the arrow 40 in FIG. The two permanent magnets 36 described above are rotated in the direction of
．． In addition to determining the direction of the magnetic attraction force acting between 38 and 38,
By appropriately setting the magnitude of the magnetic attraction force acting between the two permanent magnets 36 and 38, the magnetic head H
This is similar to the case of the signal scanner assembly described with reference to the first part, in that it can be brought into contact with the surface of the rotating recording medium with a predetermined contact pressure.

In the state where the first member C and the second member E are integrated, the side wall 60 of the first member C, in which the through hole 32 for receiving the pivot is formed, and the pivot The receiving through hole 32 is parallel to the side surface 63 of the second member E in which the pivot 34 to be engaged is implanted, and the second member E has the aforementioned L groove 62Ω for receiving the pivot. The side wall 61 of the first member C is parallel to the side wall 64 of the second member E, in which the pivot 34 that is engaged with the pivot receiving L groove 62M is implanted, and the side wall 61 of the first member C is parallel to the side wall 64 of the second member E Two conical pivots 34.3 at
5 is installed perpendicularly to each side surface of the second member E, so that the conical pivot 34 is installed at the rear of the side wall 60 of the first member C. When the conical pivot 35 is inserted into the hole 32 and engaged with the pivot receiving groove 62m provided at the rear of the first member C, the first member Even if C is pulled forward.

The two described above are never separated, and therefore, the signal scanner assembly of the present invention shown in FIG.
The member C and the second member E will not be separated.

Further, the first member C and the second member E can be connected and separated very easily due to the presence of the L groove 62m provided in one side wall 61 of the first member C. That is, on the side wall 60.61 of the first member C, the second
two conical pivots 34, 35 in member E of
The pivot receiving retaining portion provided to be engaged with the
One of them 32 has a circular planar cross-sectional shape, but the other one 62n has a V-shaped planar cross-sectional shape, so the first member C and the second member E The coupling and separation operations can be easily performed by using the above-mentioned L groove 62n, and therefore, the first member C, which is a consumable item, can be replaced extremely easily. Moreover, the configuration required for engagement with the second member E in the first member C, which is a consumable item, is an eight-legged pivot provided on the second member E. This is because only a circular hole and an L groove that engage with the vicinity of the tip are provided.

The fact that the first member C can be manufactured at low cost is the same as in the case of the signal scanner assembly described above with reference to FIG.

Next, FIG. 10 shows the permanent magnet 36 fixed to the mounting plate 37 of the first member C and the permanent magnet 38 provided on the second member E in the signal scanner shown in FIG. By laterally shifting the installation positions of the magnets 36 and 38 from their opposed positions, the first member C is also urged by the arrow 65 in FIG. 2 due to the magnetic attraction between the magnets 36 and 38. In this manner, the pivot 34 implanted in the second member E is surely engaged with the pivot receiving through hole 32 provided in the side wall 61 of the first member C. FIG. 7 is a plan view from the back of the embodiment in the case of the present invention.

13 is a perspective view of the first member C in the signal scanner assembly described in connection with FIG. 9, and FIG. 14 is a perspective view of the first member C in the signal scanner assembly described in connection with FIG.
Fig. 14 is a perspective view of a structure in which the bending mode of the member C is reversed from that shown in Fig. 9; relays between the cable and the external lead line.

FIG. 12 shows that, as the first member C in the signal scanner assembly, the base of a pipe 50 (for example, an aluminum pipe) made of a suitable material is fixed to a coupling plate 51, and a permanent part is attached to the back side of the coupling plate 51. The magnet 36 is fixed, and further,
The magnetic head H is fixed to the tip of the pipe 50 described above, and both ends of the coupling plate 51 described above are bent, and a through hole 32 for a pivot receiver and a Li2S for a pivot receiver are inserted therein.
22, and the second member E to be used in combination with the first member C described above is the side walls 52a and 52b provided at both ends of the substrate 52.
The first member C and the second member E are connected to each other by installing pivots 34 and 35 in the respective parts and attaching a permanent magnet 38 to the substrate 52 described above. FIG. 2 is a perspective view of an embodiment of the scanner assembly;

(Effects) As is clear from the above detailed explanation, the signal scanner assembly of the present invention includes a first signal scanner that is to be brought into contact with the recording medium surface of a rotating recording medium with a predetermined contact pressure. and a second member to which the first member is removably coupled, the second member having two pivots; Furthermore, on both sides of the end opposite to the end where the signal scanner is attached in the first member, there are two pivots attached to each of the two pivots provided in the second member. In addition to providing a corresponding engaging portion for receiving the pivot, the first member and the second member are provided with a biasing force for mechanically coupling the first member and the second member. A signal scanner assembly configured to use magnetic force generated between magnetic field generating members provided respectively, the second member of the first member C being a consumable item in the signal scanner assembly of the present invention. The only component for mechanical engagement with the second member E is an engagement portion for engaging the vicinity of the tip of the conical pivot provided on the second member E. In the sub-assembly, an expensive pivot is used for the part that is not considered a consumable item, and a precision-machined pivot holder is not used as the pivot holder, so the signal scanner assembly Not only can it be provided at low cost, but also the two pivot receiving engaging parts provided on the first member corresponding to the two pivots provided on the second member can be provided on the first member. Since it is provided on the side wall of the first member, the first member C and the second member E will not be separated even by a balance or vibration applied to the device from the outside. According to the invention, the above-mentioned problems of the conventional art are satisfactorily solved, and in practice, by forming one of the pivot receiving engaging portions into a groove of a predetermined shape,
It is easy to attach and detach, and it is possible to prevent dissociation between the first and second members from occurring due to shock or vibration.

In addition, the first member to which the signal scanner is attached is constructed by bending a thin metal plate, and its planar shape is triangular, and the signal scanner is attached to the apex of the triangle. By providing a configuration in which two pivot receiving engaging portions are provided at the rear of the signal scanner assembly, a signal scanner assembly that is inexpensive and has a large mechanical strength can be easily obtained. By using an electromagnet as one of the magnetic field generating members provided in the member and the second member, the contact pressure of the magnetic head against the surface of the rotating recording medium can be freely adjusted.
According to the signal scanner assembly of the present invention, the drawbacks of the conventional ones mentioned above can be overcome, and a No. 43 scanner assembly with high accuracy can be provided at extremely low cost.

[Brief explanation of drawings]

1 to 3 and 5 to 14 are perspective views of six different embodiments of the signal scanner assembly of the present invention, and FIG. 4(a) is the signal scanner assembly shown in FIG. 1. Developed view when the first member is made of a thin metal plate, No. 41ii! I
(b) is a back view of the one shown in FIG. 4 (a) above after being bent, and (Q) in FIG.
is a side sectional view taken along the line W-W shown in FIG. 4(b), and FIG. 4(d) is a side sectional view taken from the arrow U shown in FIG. 4(b), from the U direction. Viewed side sectional view, (a
) is a developed view of the signal scanner assembly shown in FIG. 9 when the first member is made of a thin metal plate, and FIG. 11(b) is the one shown in FIG. 11(a) above. Figure 11 (c) is the back view of the one that has been bent.
Figure 11(d) is a side cross-sectional view taken along the line W-W shown in Figure 4(b), and arrow U shown in Figure 4(b), a side cross-sectional view taken from the direction of U. Figures 15 and 17
The figure is an explanatory diagram of how a pressing force is generated by the magnetic force generated between two permanent magnets. Figure 16 is an illustration of how a magnetic head is applied to a rotating recording medium with an appropriate contact pressure by the magnetic force generated between two permanent magnets. FIG. 18 is a perspective view of the signal scanner assembly of the present invention attached to a cutter 7, and FIG. 19 is an example of a recording/reproducing device. FIG. 20 and FIG. 21 are perspective views of the conventional example, and FIG. 22 is a perspective view of the conventional example.
FIG. 3 is a perspective view of the previously proposed signal scanner assembly. C...First member, E...Second member, H...Magnetic head, 32.33...Through hole for pivot receiving, 34
, 35... Pivot, 36.38... Permanent magnet, 5
0...Pipe, 51...Binding plate, 52...Substrate,
39...Electromagnet. 60.61... Side wall, 62-V groove, f32 n/L groove, 66... Spring. (Old) 11th picture

Claims (1)

[Claims] 1. A first member provided with a signal scanner that is to be brought into contact with a recording medium surface of a rotating recording medium with a predetermined contact pressure and the first member described above are removably coupled. In the signal scanner assembly, the second member is provided with two pivots, and the end of the first member to which the signal scanner is attached is provided with two pivots. At both side portions of the end opposite to the above-mentioned part, engaging parts for receiving pivots corresponding to each of the two pivots provided on the above-mentioned second member are provided, and the above-mentioned first member The magnetic force generated between the magnetic field generating members provided on the first member and the second member, respectively, is used as the urging force for mechanically coupling the member and the second member. In the signal scanner assembly 2, one of the two pivot receiving engagement portions provided on the first member corresponding to the two pivots provided on the second member has a planar cross-sectional shape. The signal scanner assembly 3 according to claim 1, wherein the groove is circular, and the other groove has a V-shaped planar cross-section and an open outer end. One of the two pivot-receiving engaging portions provided on the first member corresponding to the two pivots provided on the second member has a circular planar cross-sectional shape, and the other The signal scanner assembly 4 according to claim 1, wherein the groove has a substantially L-shaped planar cross-sectional shape and an open outer end; Signal scanning according to claim 1, using a first member formed by bending a thin metal plate and having engaging portions for receiving pivots on the rear portions of both sides thereof. The child assembly 5 has a triangular planar shape by bending a thin metal plate, and a signal scanner is attached to the apex of the triangle, and two signal scanners are attached to the sides near the bottom of the apex. The signal scanner assembly 6 according to claim 1 uses a first member having an engaging portion for receiving a pivot, the first member and the second member each having an engaging portion for receiving a pivot. A signal scanner assembly 7 according to claim 1, in which one of the magnetic field generating members is an electromagnet, the first member and the second member having two pivots and the two aforementioned two members. In a state where the pivot is mechanically connected to the two corresponding pivot receiving engagement parts,
Permanent magnets are provided in the first member and the second member, respectively, to generate a biasing magnetic force for mechanically coupling the first member and the second member. The first member and the second member are arranged in such a manner that a biasing force can be generated to press one pivot and the corresponding pivot receiving engagement portion by the magnetic force generated between the first member and the second member.
A signal scanner assembly 8 according to claim 1, wherein the first member and the second member are respectively provided on two pivots and the two pivots mentioned above. and the two corresponding pivot receiving engaging portions, in a state where they are mechanically connected,
Permanent magnets are provided in the first member and the second member, respectively, to generate a biasing magnetic force for mechanically coupling the first member and the second member. The first member and the second member are arranged in such a manner that the magnetic force generated therebetween generates a biasing force that causes the signal scanner to contact the recording medium surface of the rotating recording medium with a predetermined contact pressure. The signal scanner assembly 9 according to claim 1, wherein the first member and the second member include two pivots and two pivot receivers corresponding to the two pivots described above. In order to generate a biasing magnetic force for mechanically coupling the first member and the second member, the first member and the second member are mechanically connected by the engaging portion of the first member and the second member. The permanent magnets provided on the second member and the second member press one pivot and the corresponding pivot receiving engagement part by the magnetic force generated between them, and the magnetic force generated between them. The first member and the second member are each provided with a configuration that can generate a biasing force that allows the signal scanner to contact the recording medium surface of the rotating recording medium with a predetermined contact pressure by magnetic force. The signal scanner assembly according to claim 1, wherein