JPS6363121A - Magnetic head feeding device - Google Patents

Abstract

PURPOSE:To compose the loading structure of a magnetic head with a simple structure and to shield the magnetic noise by providing a shielding material by approaching to a gimbal at the position surrounding the head core of a magnetic head. CONSTITUTION:A magnetic head 2 is loaded via a gimbal 13 on the carriage slidably held in a guide means direction. The shielding material 17 is provided, which is located at the position surrounding the head core 2b of the magnetic head 2, spreading in about the same face direction as the gimbal 13 and arranged by approaching to the gimbal 13. The shielding material 17 is of the structure arranging by approaching to the gimbal 13 as to the arrangement positional relation of the shielding material 17. With this composition, the shielding material 17 is to shield the noise from the plane direction for the magnetic head 2 and the side face direction, the structure is simple and in its arrangement, the arrangement and fabrication are extremely excellent. When the arrangement is performed with the close contact with the gimbal 13 in the arrangement positional relation of the shielding material 17, its arrangement and fabrication are further improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head feeding device in a magnetic recording device, and more particularly to a mounting structure for a magnetic head.

[Prior Art] A magnetic head is mounted on a carriage that is equipped with a conventional guide means and a sliding means that is slidable in engagement with the guide means, and is held so as to be able to move in the direction of the guide means.
Typical examples of a magnetic head feeding device that reciprocates the magnetic head in the direction of the guide means by following the articulated motion of the articulated drive means are Utility Model Publication No. 49-34340 and U.!
=i, has a structure as shown in the publication of Patent 4,428.012, and is shown in more detail in FIGS. 13 to 18.

FIG. 3 is a perspective view of a main part of a conventional magnetic head feeding device, and FIG. 14 is a diagram illustrating the regulation of its movement. 15 and 16 are diagrams for explaining the relationship between the rack and the binion, FIG. 17 is a detailed cross-sectional view of the mounting of the magnetic head, and FIG. 18 is a detailed cross-sectional view of the sliding part.

In FIG. 13, the guide shaft 51, which is the guide means, is
It is fixed to the frame 60 by a pressing plate 59 having elasticity.

Carriage 53 with magnetic head 52 mounted at a required position
has a rack 55, is slidably guided by the guide tlQl151 via a metal bush 68, and is held rotatably about the guide shaft 51.

On the other hand, a step motor 56 as a rotation adjustment driving means is disposed on the frame 60, and a pinion 54 is formed on the rotation output shaft of the step motor 56, and meshes with the rack 55.

A pressurizing spring 58 for applying pressurization to the engagement between the rack 55 and the pinion 54 has a roller 57 on its support and applies pressurization in the direction of arrow 61.

The step motor 56 receives and supports this preload force and is driven in variable motion.

In the above structure, when the step motor 56 is driven in H motion, the carriage 53 moves and moves along the guide and shaft 51 without disengaging the rack 55 and the pinion 54. and
Turning over, when the carriage 53 is moved, the step motor 56 is applied with a rotating force.

On the other hand, the carriage 53, which is slidable while being guided by the guide shaft 51, has an abutting portion 60 of the frame 60 at one end.
The range of movement is regulated by means of a stopper, which is brought into contact with a VJ setting screw 62 screwed into the frame 60 at the other end and which is brought into contact with a vJ setting screw 62 screwed into the frame 60 at the other end.

The regulation of the eight motions of the carriage 53 will be explained with reference to FIG.

FIG. 14 is a section for explaining the movement restriction of the conventional magnetic head feeding device shown in FIG. 13, starting from the top in the figure: Carriage movement restriction W! The figure shows the four adjustment ranges, carriage stopper, track position, step motor rotation direction, and step motor torque curve.

First, the reference track position is set as 007r, with the horizontal axis representing the phase positional relationship between the absolute position of the carriage 53 and the excitation phase of the step motor 56, that is, the track position. (In a magnetic recording device, the reference track position,
That is, the track positions are standardized such that the 0OTr position is defined as the outermost track position, and the track positions are counted as nTr toward the inner circumference. ) In the figure, the positive number Tr is based on the 0OTr position, and the inner circumference side is
A negative number Tr means the outer circumferential side.

If we take a four-phase step motor that feeds (ITr/1 step) as an example, when it is excited to the excitation phase at the 0OTr position, the step motor will continuously move as shown in the figure corresponding to the track position. It shows the torque curve, and the same excitation phase is 14Tr, 0OTr,
It rotates to any one of the track positions of 4Tr, .

To explain based on FIG. 14, when the phase position state before excitation is located between 2Tr and -2TrO, 0O
It has a structure that rotates toward the Tr.

Regarding the position adjustment of the adjustment screw 62, the 14th
In the figure, when the carriage 53 moves from the inner peripheral side toward the 0OTr position and stops at the 0OTr position,
Due to the inertia of the carriage 53 and the rotor of the step motor 56, even if the carriage 53 overshoots, PIl! The remaining amount is obtained by subtracting the margin XI that does not contact the I adjustment screw 62, the dead zone region of the torque curve of the step motor 56 mentioned above, and the margin X2 that allows sufficient movement toward the 0OTr position, that is, the The shaded area in FIG. 14 is the position adjustment range of the adjustment screw 62, and the carriage 53 is prevented from moving further to the outer circumferential side beyond -2Tr.

Furthermore, even after the above-mentioned position adjustment of the adjusting screw 62 was performed, the operation as shown in FIGS. 15 and 16 was performed.

FIG. 15 is a diagram illustrating the relationship between the rack and the binion of a conventional magnetic head feeding device, and shows two states, and the binions 54a and 54b are in different states but have the same structure. .

Similarly to FIG. 15, FIG. 16 is a diagram for explaining the relationship between the rack and the binion of the conventional magnetic head feeding device, and the binion 54c has the same structure as that in FIG. 15, although the state is different.

￥S Figure 15 and Figure 16 are shown in Figure 13 to simplify the explanation.
F! 1. Let's simplify the explanation.

In FIG. 15, the right half shows a state in which the bin 4 pin 54a rotates in the direction of the arrow 72 and the rack 55 comes into contact with the adjustment screw 62 screwed and held in the frame 60 described above under normal usage environment. Indicates a stopped state.

On the other hand, the left half of FIG. 15 shows, for example, intense fJi u
Even though the rack 55 hit the adjustment screw 62 screwed and held in the frame 60 and stopped instantaneously, the binion 54b could not be stopped instantaneously due to the inertia of its rotation system, and the The rack 55 is moved against the pressure in the direction of arrow 61 by the pressure spring 58 and roller 57 for applying pressure to the meshing of the rack 55 and the pinion 54 described above in FIG. The binion 54b moves as shown by the arrow 72a according to the amount of the shift.
This shows a state in which the magnetic recording device overruns the direction by an angle θ and stops, and this state is particularly likely to occur when the magnetic recording device is transported.

Incidentally, the pressurizing spring 58 is used as a means for applying pressurizing force to the engagement between the rack 55 and the binion 54, which was described above in FIG. 13. When the pressurizing structure using the roller 57 is subjected to vibration or a new shock, the pressurizing force often stops acting due to bounce caused by the mass of the structure, resonance of the pressurizing spring 58, etc. Met.

The most appropriate way to prevent such jumping, resonance, etc. as much as possible is to increase the pressurizing force of the pressurizing spring 58. However, if the pressurizing force is increased,
The friction IN loss due to the pressurizing force of the step motor 56 increases, the characteristics of the step motor 56 deteriorate, and in turn, the power consumption increases to improve the characteristics of the step motor 56... a vicious cycle. There was no definitive effective solution, and the situation was often such that the binion 54b overran the angle θ in the direction of the arrow 72a and stopped, as shown in the left half of Fig. 15. .

As mentioned above, even after adjusting the adjustment screw 62 by one position, if an overrun occurs as shown in FIG. 15, the gear ridge 53 will come into contact with the adjustment screw 62 and stop in FIG. 14. Despite this, the step motor 56 overruns and far exceeds the original excitation phase position, that is, −2Tr.
In this state, when the motor is excited to the excitation phase at the reference track position, that is, the 00Tr position, the step motor 56 tries to rotate in the -4Tr direction, while the carriage 53 comes into contact with the adjustment screw 62. They were stationary, stuck together, and unable to move in either direction, resulting in a so-called stuck phenomenon, making it impossible to escape forever.

Furthermore, when the amount of overrun of the binion 54b increases as described above in the left half of FIG. 15, the situation as shown in FIG. Even though the pinion 54C stopped instantly due to the
Due to the inertia in the direction, it cannot be stopped, and the displacement 1h shown in FIG. 15 of the rack 55 described above in FIG. 15 is further increased, and as shown in FIG. The meshing phase positional relationship will lose a certain regularity.

In other words, a certain regularity in the phase position relationship between the absolute position of the carriage 53 and the excitation phase of the step motor 56 described above in FIG. 14 disappears, and the magnetic This causes a serious defect that completely eliminates the compatibility function as a recording device.

On the other hand, to explain the mounting of the magnetic head, the first
It will look like Figure 7.

FIG. 17 shows a magnetic head t' of a conventional magnetic head feeding device 7.
It is a detailed sectional view on IR.

In FIG. 17, the above-mentioned carriage 53 made of, for example, a plastic member or the like carries the magnetic head 52 via a gimbal 64.

However, magnetic recording devices are often constructed with a built-in motor for driving the medium and equipment that leaks magnetism, such as a transformer, and the magnetic head 52 reacts sensitively to even the slightest leakage of magnetism. The more the page is affected, the higher the sensitivity is, and as shown in FIG. 17, the magnetic head 5
If the motor 66 is disposed near the magnetic head 2, as described above, the magnetic head 52 will react sensitively to even the slightest leakage of magnetism, making it impossible to fully demonstrate its original characteristics. A magnetic head shielding material 67 for shielding the periphery of the magnetic head 52, a magnetic shielding material 65 for shielding even the slightest leakage of magnetism from the motor 66 to the magnetic head 52, and the like are indispensable.

Furthermore, the above Ki? The structure of the sliding portion of the first ridge 53 will be explained as shown in FIG. 18.

FIG. 18 is a detailed sectional view of a sliding portion of a conventional magnetic head feeding device.

In FIG. 18, the aforementioned carriage 53, which is made of, for example, a plastic member, engages a metal bushing 68, and is held on the guide shaft 51 so as to be slidable and rotatable via the metal bushing 68. ing.

By the way, the most important thing about a magnetic recording device is that the track position can be precisely accessed based on a command during recording and reproduction of a medium. Accuracy plays an important role, and in particular, securing the rigidity of the carriage 53 and preventing wear of the sliding parts are essential techniques. , contains glass fiber, etc. to ensure its rigidity, and on the other hand, the above-mentioned sliding part is provided with a metal bushing 68 to prevent wear of the carriage 53, which is caused by surface precipitation of the above-mentioned glass fiber, etc. This structure prevents the guide shaft 51 from being worn out.

[Problems to be Solved by the Invention] As mentioned above, the conventional technology has 1. There are many problems, including fatal problems such as complete loss of compatibility of magnetic recording devices, but in order to summarize each important technical item, it is stable and... Mass production of inexpensive magnetic recording devices was not possible.

Therefore, the present invention is intended to solve these problems, and its purpose is to solve fI! It has a compact structure for mounting the magnetic head, shields magnetic noise, and eliminates fatal flaws as a magnetic recording device, making mass production extremely easy and inexpensive. This provides a highly reliable magnetic recording device.

[Means for Solving the Problems] The magnetic head feeding device of the present invention includes a guide means, and a slider engaged with the guide means.
I! A magnetic head is mounted via a gimbal on a carriage that is slidably held in the direction of the guide means, and is driven by the articulation of the articulation drive means to move the magnetic head in the direction of the guide means. A magnetic head feeding device for reciprocating the magnetic head, comprising: 1) a shield material extending substantially in the same plane as the gimbal, surrounding the head core of the magnetic head, and disposed close to the gimbal; It is characterized by becoming.

2) Regarding the arrangement positional relationship of the shield material, it is characterized in that it is arranged in close proximity to the gimbal [Function] According to the above structure of the present invention, the shield material This shields the head from noise from both the plane and side directions, has a simple structure, and is extremely easy to assemble.

Furthermore, regarding the positional relationship of the shield material, if it is disposed in close proximity to the gimbal, the arrangement thereof may be difficult.

Assembleability is further improved.

[Example] 1, 2, 3, 4, and 5.

FIGS. 6 and 7 show a magnetic head mounted on a carriage that is slidably held in the direction of the guide means, and has a guide means of the present invention and a slide means that is slidably engaged with the guide means. This is one of the most suitable embodiments of a magnetic head feeding device in which the magnetic head is reciprocated in the direction of the guide means in accordance with the articulation of the articulation drive means, and FIG. 8 and tjS
9, FIG. 10, FIG. 11, and FIG. 12 are diagrams showing other application examples of the present invention.

FIG. 1 is a perspective view of the main part of the magnetic head feeding device of the present invention, and FIG. 2 is a diagram illustrating the regulation of its movement. FIG. 13 and FIG. 4 are diagrams for explaining one means of the stopper.

FIG. 5 is a diagram illustrating the relationship between the rack and the binion of the magnetic head feeding device of the present invention, FIG. 6 is a detailed G1ff sectional view of the mounting of the magnetic head in the magnetic head feeding device of the present invention, and FIG. FIG. 3 is a detailed sectional view of a sliding portion of the magnetic head feeding device.

9, FIG. 10, FIG. 11, and FIG. 12 are diagrams for explaining other application examples of the stopper means.

In FIG. 1, a guide shaft l serving as a guide means is fixed to a frame 10 by an elastic presser plate 9. As shown in FIG.

The carriage 3 with the magnetic head 2 mounted at the required position is
The rack 3a is integrally held by the receiver, and is held slidably and rotatably about the guide shaft 1 while being guided by the guide shaft 1.

On the other hand, a step motor 6 as a rotational adjustment drive means is disposed on the frame 10, and a rotation output shaft 5 of the step motor 6 constitutes a binion 4, which meshes with the rack 3a. .

Regarding the above-mentioned arrangement of the step motor 6, the outer body of the step motor 6 is held concentrically with the rotary output shaft 5 and held on the frame 10 by rotatable means, and the rotation of the step motor 6 is It also has means for fixing the motion by, for example, screwing. (Illustration omitted) As a means for applying pressurization to the engagement between the rack 3a and the pinion 4, a magnet 7 disposed in a part of the carriage engine 3 and facing the magnet 7 are provided. The carriage 3, which can freely slide and rotate twice, is a means for fixing the position relative to the carriage 3. For example, in combination with a frame 1o containing a magnetic material, a magnetic circuit as shown by the broken line in the figure is constructed. Pressure is applied in the direction of arrow 11.

The step motor 6 receives and supports the pressurizing force and is driven in variable motion.

In the above structure, when the step motor 6 is driven, the rack 3a and the pinion 4 are not disengaged from each other, and the carriage 3 is driven to move along the guide shaft 1 in the direction of the arrow 12. and
Turning over, when the carriage 3 is moved, the step motor 6 is applied with a rotating force.

On the other hand, the carriage 3, which is slidable while being guided by the guide shaft 1, is attached to both ends of the rack 3a.
comes into contact with the rotating output shaft 5 including the vinyl and 4-in 4 from the direction of movement of the carriage 3, and restricts the S movement of the carriage 3,
It has an abutment wall 3b and an abutment wall 3c as a stopper means for regulating the rotation of the pinion 4, and the abutment wall 3
b and abutment ri3c each restrict the movement of the carriage 3 and the rotation of the pinion 4 when they come into contact with the rotation output shaft 5 including the binion 4 from the moving direction of the carriage 3.

In other words, the movement range of the carriage 3 in the direction of the arrow 12 is restricted.

The relationship between the absolute position of the carriage 3 and the excitation phase of the step motor 6, that is, the rack 3
The meshing positional relationship between a and the binion 4 has a certain regularity, and a transmission type photosensor 8 is provided as a position detection means for initializing the standard of this regularity. A light shielding plate 3d is provided in a part of the carriage 3, and when the light shielding plate 3d blocks light from the transmission type photosensor 8, a necessary signal is generated to carry out the reference initial setting.

Here, in order to make the following explanation easier to understand, the stopper means of the magnetic head feeding device of the present invention and the relationship between the rack and the pinion will be described in detail.

FIG. 5 is a diagram illustrating the relationship between the rack and the binion of the magnetic head feeding device of the present invention, and is an enlarged view of the main part of FIG.
b are arranged for the sake of explanation, and although they are independent, they are binions of the same configuration.

FIGS. 3 and 4 are diagrams for explaining one means of the stopper, and the two diagrams are related.

In FIG. 5, the normal meshing state of the rack 3a and the pinion 4 is shown in the center, and the magnet 7 disposed on a part of the carriage 3 as described above in FIG.
The carriage 3, which faces the magnet 7 and is slidable and can rotate once, is a means for relatively fixing the position. Both sides are engaged without any backlash due to pressurization in the direction of arrow 11, which is constructed by a magnetic circuit as shown in .

However, if the pinion 4 is subjected to severe vibrations or shocks in the meshed state, the step motor 6
Although the carriage 3 is in a stopped state due to the detent torque and holding torque, the carriage 3 tries to move in the sliding direction guided by the guide shaft 1.

In other words, the carriage 3 rises against the pressurization in the direction of the arrow 11, and the meshing state is disturbed, and on the other hand, violent vibrations occur in the direction against the pressurization in the direction of the arrow 11. When subjected to an impact, the carriage 3 tends to disengage from the engagement, and as a means to prevent this engagement from being disturbed or disengaged, the magnet 7 disposed on a part of the carriage 3 described above in FIG. 1 is used. and,
The carriage 3, which faces the magnet 7 and is slidable and rotatable twice, is a means for relatively fixing the position, and for example, in combination with a frame 10 containing a magnetic material, it is shown by a broken line in the figure. Arrow 1 composed of magnetic circuits like
An appropriate method is to increase the pressurization force in one direction, but if the pressurization force is increased, the friction loss due to the pressurization force of the step motor 6 increases, and the step motor 6 The characteristics of the step motor 6 are inferior, and in turn, the power consumption must be increased to improve the characteristics of the step motor 6...This is not a good idea as it repeats a vicious cycle.

Therefore, in the present invention: jIn the diagram S1, the rack 3a
A contour wall 3e having a required gap is disposed opposite to the binion 4 with the binion 4 in between.

FIG. 5 is a diagram illustrating the relationship between the rack and the pinion sandwiching the contour wall 3e. As a means for preventing the above-mentioned disturbance of engagement and separation, the contour wall 3e is inserted from the side opposite to the rack 3a. Binion 4a in the figure.

The rack 3a and the binion 4 are in contact with each other as shown in the state shown in b to regulate the amount of separation of the rack 3a and the binion 4, and even in the state of the binion 41) where the amount of female parent is maximum, the rack 3a and the The meshing phase of both tooth profiles in 4 is:
The structure is such that it will not shift even if you jump over it.

Needless to say, in the contact relationship of the contour wall 3e, in FIG. 5, the contour wall 3e comes into contact with the tooth profile of the binion t1 and fulfills the above-mentioned role, but the rotation output shaft 5 in FIG. Also, even if the rotary output shaft 5 and the binion (2) come into contact with the contour u3e as described above, the same effect is achieved.

Next, the rack 3a is brought into contact with a rotary force shaft 5 that fits the binion 4 from the direction of movement of the carriage 3 at both ends of the rack 3a,
A stopper means for regulating the movement of the rack 3a and the rotation of the binion 4 will be explained based on FIGS. 3 and 4.

FIGS. 3 and 11 are diagrams illustrating the aforementioned stopper means of the magnetic head feeding device of the present invention, and the two diagrams are related.

FIG. 3 shows the rack 3a when the binion 4 is rotated.
This is to explain the relative movement between vJ and flash, and for convenience of the explanatory drawing, the rack 3a is fixed in position and the binion 4 is planetarily moved on the dashed line A while rotating in the direction of arrow 23d in the figure. , is a drawing projecting its trajectory.

The planetary movement process of the binion 4 is shown by a thin line, and the state in which the binion 4 is in rotational contact with the abutment wall 3cb from the rotational direction on one side, and is engaged with the rack 3a on the other side is shown by a solid line in the figure. ing.

3, (1) The pinion 4 was rotated to move the rack 3''a, and the pinion 4 was brought into contact with the abutment wall 3cb.

(2) The rack 3a was moved, the binion 4 was rotated, and the binion 4 was brought into contact with the contact wall 3cb.

It shows two modes.

It would be good if the rotation of the binion 4 and the movement of the rack 3a could be stopped in the state where the binion 4 is shown by the solid line in FIG. The amount of overrun can be controlled to a very small amount by adjusting the dimensions at various locations.

Two modes that stop after a slight overrun,
This will be explained with reference to FIG.

FIG. 4 shows a state in which the rotation of the binion 4 and the movement of the rack 3a are stopped, and the dashed line A indicates the center position of the binion 4 when the binion 4 and the rack 3a are in the required meshing state. This is the line that shows.

For convenience of explanatory drawings, the rack 3a is fixed in position and the binion 4 is moved in the drawing, but it is originally the opposite, and the rack 3a is moved while the binion l↓ is fixed in position. It is something.

Here, the abutting wall 3Cbl will be explained.

In FIG. 3, the abutment wall 3cb is connected to the binion-1
It is configured with a circular arc surface Ka slightly larger than the diameter of the tip of the pinion 4, that is, the outer diameter, and is centered at a position B that is slightly offset from the center of the pinion 4. As shown in Fig. 3, although it is very close to the diameter of the tip of the pinion 4, that is, the outer diameter, it is not a structure in which the pinion 4 is fixed in any way.

It goes without saying that the abutment wall 3cb of this embodiment has a simple shape and can stabilize the mass production process when forming the abutment wall 3cb.

Now, the two modes mentioned above in which the motor stops after a slight overrun will be explained with reference to FIG.

First, when the binion 1 is further rotated in the direction of the arrow 23e in the figure from the state of (ii) above, the binion 4 is moved toward the rack 3a with the abutment wall 3cb in the abutting state as a fulcrum. Add rotational movement force to the first! ;! Pressure is applied in the direction of arrow 11 mentioned above in I; against this, the rack 3a is
That is, the carriage 3 is moved by the amount indicated by h3 in FIG.
Rotate in the direction of the arrow 2:]e by an angle θ3 in the figure.

On the other hand, the front abutting wall 3 c l) Part 3 c
i] It comes into contact with 1 and stops.

In this stop mode, the step motor 6 force t (Jl
For example, it is effective when a malfunction occurs due to external noise, etc., and it settles and regulates its own rotation. If the vehicle is stopped as described above, a slight damper effect will also be exerted at the time of the stop.

(2) Even if a force is further applied to the carriage 3 from the state (2), the carriage 3 will not move toward the contact wall 3.
cb is in contact with the pinion 4 from the direction in which the carriage 3 is moved, and cannot move any further.

On the other hand, when the carriage 3 moves by 2fL due to, for example, severe vibration or impact as described in the state (2) above, the carriage 3, that is, the abutment wall 3cb moves against the pinion 4 of the carriage 3. Even though the pinion 4 is in contact with the abutment wall 3cb from the moving direction and is in a state where it cannot move any further, it cannot stop suddenly due to the inertia of its rotation system, and the pinion 4 abuts against the abutment wall 3cb. On the other hand, the rack 3a continues to rotate in the contact state, and on the other hand, a rotational force is applied to the rack 3a, and the rack 3a, that is, the carriage 3 in FIG. h
3, and rotates in the direction of the arrow 23e by the rotatable angle θ3 in FIG. When the carriage 3 is tightened, its rotation is stopped and the movement of the carriage 3 is also stopped.

Naturally, at the time of stopping, the pinion 4 and the rack 3a are engaged with each other, albeit irregularly.

In this application example, the contour wall 3e described above in FIG. Although the stopper does not function as a stopper, the rack 3a and the pinion 4 shown in FIG.
It functions as a means to prevent separation of the interlocking relationship.

The stop mode is effective, for example, when the carriage 3 moves violently along the guide shaft 1 due to severe vibrations or tits, and the movement of the carriage 3 is restricted, as previously described in FIG. Moreover, unlike the prior art, the binion does not instantaneously stop following the instantaneous stop of the carriage, but when it is stopped as described above, a slight damper effect is also exerted as in (2).

It has a structure in which the movement of the carriage 3 is restricted, and the rotation of the pinion 4 is also stopped by causing a slight overrun, and the abutment wall 3cb, together with the rack 3a, , restricts the movement of the carriage 3, and also controls the movement of the carriage 3 and the nion 4.
It also constitutes a stopper means for regulating the rotation of.

As shown in FIGS. 3 and 4, the abutment wall 3cb is centered at a point MB that is slightly offset from the center of the pinion 4, and is slightly smaller than the diameter of the tip circle of the pinion 4, that is, the outer diameter. The rack 3a has a slightly larger arcuate surface shape, and the tooth tip of the rack 3a has a moderate arcuate shape, so that even if it is subjected to severe vibration or impact as described above, the pinion 4 will still be able to maintain the edge center of the tooth tip. Contact wall 3 c b l: + The edge of the tooth tip of the rack 3a does not collide with the pinion 4, and both sides are prevented from damage such as scratches, etc.
Furthermore, if the tip of the pinion 4 is formed into a moderately arcuate shape similar to the tip of the rack 3a by means of, for example, puff polishing, the y! As for the prevention of damage to J, etc., this effect is even more effective.As mentioned above, this application example serves as a means for restricting both the movement of the carriage 3 and the rotation of the pinion 4. Considering its functionality and ease of configuration, it is no exaggeration to say that it is more similar than any other application example.

Incidentally, the above a is the rack 3a, the contact wall 3cb,
Although the above-mentioned contour wall 3eb has been explained with reference to the diagram in which the contour wall 3eb is configured on the same plane, in the stopper means of the magnetic head feeding device of the present invention, the three relationships are configured in mutually different planes, and the three relationships and the FJI Regarding the binion 1 and the rotary output shaft 5 that engage with each other, the rack 3a
The binion 4 is attached to the abutting wall 3cb, the binion-1 and the rotary output shaft 5 are attached to the abutment wall 3cb, and the contour wall jeL+
Even if the rotary output shaft 5 and the binio/.4 are made to correspond to each other, it is possible to obtain the same 4:p effect as the above-mentioned 1-stubber stage. (Illustration - 100i'l3) On the other hand,
As mentioned above in the prior art, in magnetic recording devices, the recording/reproducing track position of the medium is standardized, and in configuring the stopper means of the present invention, the stopper means and the recording/reproducing track position of the medium, That is, the position a of the magnetic head 2 mounted on the carriage 3 in FIG.
It is necessary to construct a movement range that provides the required access to the recording/reproducing j/rack position of the medium using t1:2.

At this point, the magnetic head 2 flashes to the above-described bathing position of the magnetic head 2, and the magnetic head 2 is positioned at the recording/reproducing track position of the medium, that is, in the rotational drive system (not shown) of the medium.・The carriage 3 is controlled to be placed at a desired position from c. It constitutes a structure that allows for driven movement.

The reference position for the driven movement is the position where the step motor 6 is disposed, and is from the engagement position iW of the step motor 6, that is, the binion/1 and the rack 3a shown in FIG. Said magnetic spatula 1!2
The distance L formed by the lead dry I and the gap 2a] is controlled.

Then, by configuring the distance L1 in a desired positional relationship and arranging the front stopper means at a desired position, the magnetic head 2 can be moved as described above.
It is possible to create a moving range that allows the required access to the recording/reproducing I/rack position of the recording medium.

However, accurately grasping the relative meshing phase position relationship between the teeth of the rack 1-1 and the teeth of the rack 3X% requires a very complicated technique, and the invention 1,1-' Including a means for easily and accurately grasping the meshing phase positional relationship, means for bringing the ↑S mounting position of the magnetic head 2 mounted on the carriage 3 into the desired positional relationship as shown in Figure 1. providing.

Next, an embodiment of the present invention will be described in which the magnetic head 2 is mounted in a desired positional relationship.

In FIG. 1, the abutment wall 3c and the abutment wall 3b are integrally constructed with the aforesaid rack 3a, and in particular, the positional relationship between the shape of the rack 3a and the abutment wall 3c and the abutment wall 3b is shown. have a highly accurate relative positional relationship tt.

Furthermore, the teeth of the rack 3a mentioned above and the vinyl ton 4
As a means of accurately determining the relative meshing phase positional relationship of the teeth, a reference position P for the positional relationship of the three stamens is constructed.

According to this configuration, (1) First, the position π, the position P', IrFλ1tL2 of the step motor 6 is grasped, and the carriage 3 is rotated while rotating the binocular motor 4 according to the transfer distance L2.
by moving in two directions (arrows in FIG. Accurately grasping the phase positional relationship and the relative positional relationship between the relative meshing phase positional relationship and the surface stopper means, and
It is possible to control it.

Then, the read/write gap 2a force of the magnetic head 2 from the reference position P! distance L3.

(Li=L2+L3) When the magnetic head 2 is mounted by setting the required amount to satisfy the above (Li=L2+L3), the carriage 3 is moved by the drive of the chip motor 6 to Required notes on the medium, 31
'4 student 1, access the rack position, and
Previous: I regret the appropriate movement regulation 6J range for my career soji 3 (
Jz ;, /)r can do it.

Although it is unnecessary to describe it, the step motor G(Y)1 serving as the articulated drive means rotates in steps at a constant angle, and in the above configuration, C is the step phase of the step motor 6. First, it is necessary to set the relationship between the magnetization phase of the rotor and the relative phase position of the teeth of the binion 4 to a predetermined relationship, but regarding this condition,
The step motor 6? It is also good to configure 1 by the body state, but in the present invention, the above-mentioned rack, :! a cr) After accurately grasping and controlling the relative meshing phase positional relationship between the teeth of G1 and the pinion 4, and the relative positional relationship between the relative meshing phase positional relationship and the input lever step, the step motor 6 is We propose to apply the required magnetization to the low-coupling.

On the other hand, the above-mentioned relative meshing phase positional relationship between the teeth of the rack 3a and the lock of the pinion 4, and the relative meshing phase position f
A method of accurately grasping and controlling the relative positional relationship between the carriage and the stopper means is to
Move in one of the 12 directions shown in the figure and move either the abutment wall 3C or the abutment wall 3b to the front.
It is also good to have it in contact with 4.

Furthermore, in this configuration, there is no need to adjust the relative position of the recording/reproducing track position of the medium and the magnetic head 2, so the position of the step motor 6 may be completely fixed. This configuration facilitates extremely efficient automation in the mass production process of magnetic recording devices.

Furthermore, this structure allows easy grasping and control of the relative positional relationship between the recording/reproducing track position of the medium and the magnetic head.
Not only is it possible to mount a magnetic head on the carriage, but also the positional displacement of the rotary articulated drive means does not occur.

In other words, the relative positional relationship between the magnetic head and the recording/reproducing track position of the medium is firmly ensured, and reliability as a magnetic recording device is extremely high.

■First, the position of the step motor 6 and the reference position B
The distance of P (4r=2 is grasped, and the first
Based on the structure described above in the figure, the outer body of the step motor 6 is rotated to move the carriage 3, the reference position P is set to a required position, and the distance L2 is corrected. It is possible to accurately grasp and control the relative meshing phase positional relationship between the tooth 3a and the tooth of the pinion 4, and the relative positional relationship between the relative meshing phase positional relationship and the stopper means.

Then, the distance 1i11L3 formed by the read/write gap 2a of the magnetic head 2 from the reference position P is (LL=L
When the magnetic head 2 is mounted with the magnetic head 2 set to the required amount that satisfies 2+L3), the carriage 3 is moved by the variable drive of the step motor 6, and the magnetic head 2 is moved to perform the required recording on the medium. At the playback track position,
If you let Aku-1 change, you can configure an appropriate movement restriction 7a for the self-carrying engine 3 beforehand.

Needless to say, the step motor 6 serving as the articulated drive means rotates in steps at a predetermined angle, and in the above configuration, the outer body of the step motor 6 is rotated to rotate the carriage. 3 is to adjust the step phase of the step motor 6, that is, the phase relationship between the magnetization phase of the rotor and the teeth of the rack 3a, to a required predetermined rA relationship. There is no need to specify the relative phase positional relationship between the teeth of the binion 4 and the magnetization phase of the rotor as a single unit.

On the other hand, as a method for accurately grasping and controlling the relative meshing phase positional relationship between the teeth of the rack 3a and the teeth of the pinion 4, and the relative positional relationship between the relative meshing phase positional relationship and the stopper means, The above-mentioned abutting wall; 3C and abutting wall 31) rotates the 6 step motors to move the carriage 3.
11f] may be brought into contact with the pinion 4.

Furthermore, in this configuration, there is no need to adjust the relative position of the recording/reproducing track position of the medium and the magnetic head 2, but if some word position adjustment is required,
The rotation of the step motor 6 has a structure that allows adjustment of @X by +2, and this configuration facilitates extremely efficient automation in the mass production process of magnetic recording devices.

■First, the position of the step motor 6 and the reference position 2p
The step motor 6 is moved to a required position in the direction of the arrow 12 in FIG. 1 according to the distance 11111L2 (in FIG. 1, the step motor 6 is movable Items that are not configured with installation means,
It is extremely simple to configure the step motor 6 with an installation means movable in the direction of the arrow 12 in FIG. 1, and there is no need to illustrate it. The following explanation will be continued assuming that it is installed movably in 12 directions. ), and if the carriage 3, which would normally move in the direction of the arrow 12 in FIG. It is possible to accurately grasp and control the relative meshing phase positional relationship between the teeth of the rack 3a and the teeth of the picion 4, and the relative positional relationship between the relative meshing phase positional relationship and the stopper means. It is possible.

Then, the distance L3 formed by the read/write gap 2a of the magnetic head 2 from the reference position P is (L1=L2+L
When the liaison head 2 is mounted with the required amount that satisfies 3), the carriage 3 is moved by the variable drive of the step motor 6, and the magnetic head 2 is moved to the required amount of the medium. In addition to accessing the recording/reproducing track position, it is possible to configure an appropriate movement restriction range of the carriage 3.

In the above configuration, the relative phase positional relationship between the magnetization phase of the rotor and the binion (C) is the same as that described above in ①, but is omitted here, but in this configuration, t) of the medium There is no need to adjust the relative position of the recording/reproducing track position and the magnetic spatulas 1 and 2, but if a slight adjustment is required, the step motor 6
The structure allows the movement of the magnetic recording device to also adjust its position, and this configuration facilitates extremely efficient automation in the mass production process of magnetic recording devices.

Furthermore, if the above structure is used in combination with the structure (2) for rotating the step motor 6, it is possible to finely adjust the position of the magnetic head 2. i! ! It has a structure that makes it even easier to adjust.

Provides a means of adjustment.

The position adjusting means for the magnetic head 2 described in (1), (2), and (3) above does not have any structure as described above in the rack 3a.
It is possible to accurately control the relative meshing phase position relationship between the teeth of the rack 3a and the teeth of the pinion 4, and the control means can accurately control the relative meshing phase position relationship between the teeth of the rack 3a and the teeth of the pinion 4, which is caused by the meshing operation of the teeth of the rack 3a and the teeth of the pinion 4. The structure also makes it possible to control the positional relationship between wear and tear.

It goes without saying that the position adjusting means for the magnetic head 2 described in (1), (2) and (3) above was explained including the front 5 abutting wall 3c and the abutting wall 3b as one stopper means. Of course, the IJ can be constructed without including the stopper means.

The means for adjusting the position of the magnetic head 2 mentioned above in (1), (2), and (3) above is a magnetic head feeding device of a magnetic recording device, such as a lead screw drive method or an alpha-wound steel The present invention has different advantages from the belt drive method (not shown), and whereas both of these two methods have all the functions for determining the feed position accuracy on the drive means side. Although the magnetic head feeding device composed of a rack and a pinion on the drive side has some function of determining the feed position accuracy, most of its important functions are The rack has a receiver, and the rack also forms the tooth profile of the function related to the feed position accuracy, and the tooth profile position of the rack can be directly recognized without necessarily arranging the reference position = p mentioned above. It is also possible to configure regulating means for controlling, and the invention provides various efficient automation means.

By the way, the most important thing about a magnetic recording device is that, as mentioned above in the conventional example, the recording/reproducing position (hereinafter referred to as track position τ) can be reliably accessed based on a command when recording and reproducing a medium. For this reason, the relationship between the absolute position of the carriage 3 and the phase position of the excitation phase of the step motor 6, that is, the reference initial setting of the I/rack position plays an important role.

Hereinafter, reference initial setting of the track position in the above structure will be explained with reference to FIG.

FIG. 2 is a diagram illustrating the restriction of movement of the magnetic head feeding device of the present invention shown in FIG. direction of rotation,
The torque curves of the step motors are each illustrated.

First, in FIG. 2, the horizontal axis represents the phase relationship between the absolute position of the carriage 3 and the excitation phase of the step motor 6, that is, the track position, and the reference track position is 0OTr.

(In a magnetic recording device, the reference track position is 0O
The track positions are standardized so that the Tr position is defined as the outermost track position and counts as nTr toward the inner circumference.

) In the figure, the positive number Tr is based on the 0OTr position, and the inner circumference side is
f4. The number Tr means the outer circumferential side. And (I
Taking a four-phase step motor with T r / l step) feed as an example, when excited to the excitation phase of 0OTr position, the step motor generates a continuous torque curve as shown in the figure corresponding to the track position. 4Tr, 0OTr, 4Tr, , (
n*4)'I'r, and the track position to which it rotates is determined by
Determined by the phase position state before excitation.

To explain based on Fig. 2, when the state is in the open state of 2Tr to -2Tr in the phase position before excitation, 0OT
Although it rotates toward r, it is still η-rotated.

What has been described above is an explanation of the phase position relationship and rotation of the excitation phase of the step motor 6, but there is one way to match the relative position relationship between the phase position of the excitation phase and the absolute position of the carriage 3 described above. As a means, the track position detection signal as shown in FIG. position, that is, the 0OTr position.

More specifically, as mentioned above, the carriage 3 is
As a means for positioning it between ~-2Tr and matching the track position detection signal, one of the 2T
On the outer circumferential side from the r position, when the carriage 3 is moved in the direction of arrows 2 and 1 from the inner circumferential side, the carriage 3 is positioned at the reference track position, that is, the 0OTr position based on the track whine detection signal. As a means for regulating the movement range of the carriage 3 from the other 12Tr position to the inner peripheral side, the pinion is installed at both ends of the rack 3a described above in FIG. 1 from the movement direction of the carriage 3. 4, and a contact wall 3c serving as a stopper for regulating the rotation of the pinion 4 is disposed, and the corresponding rear wall 3C includes the pinion 4 from the moving direction of the carriage 3. When it comes into contact with the rotating output shaft 5,
The movement of the rack 3a is restricted, and the rotation of the pinion 4 is restricted.

In other words, it restricts the movement range of the carriage 3 in the direction of the arrow 12 shown in FIG. When schematized, it becomes like a carriage stopper shown in FIG. 2, and the carriage 3 is prevented from moving further to the outer circumferential side beyond -2Tr.

Here, regarding the above-mentioned contact ri3b, when the carriage 3 moves further inward beyond the required track, the pinion 4 is moved from the moving direction of the carriage 3, similarly to the above-mentioned contact wall 3c. It comes into contact with the mating rotational output 11115 to regulate the movement of the rack 3a and the rotation of the rack 3a, in other words, the movement range of the carriage 3.The functional position is as follows. Since it is not very subtle, the following explanation will focus only on the abutment wall 3c.

Under the conditions described above, 1) In FIG. 2, when the carriage 3 is located at a position where no track position detection signal is emitted, that is, located on the inner circumferential side of 2Tr, the pinion 4 is The carriage 3 rotates in the direction of arrow 20, and the carriage 3
The position where the carriage 30 moves toward the reference track position, that is, the 0OTr position, is the position where the track position detection signal and the preset phase position of the excitation phase of the step motor 6 match. Become.

This configuration was created immediately after the electrician was installed on the magnetic recording device for the first time.
This is effective when reconfirming the reference track position when the step motor 6 malfunctions due to external noise or the like and loses track of the phase position of the excitation phase.

2) In FIG. 2, the carriage 3 is located at a position where the track position detection signal is generated, that is, between 2Tr and -2T, and the phase position of the excitation phase of the step motor 6, which is set in advance, is When excited, this position becomes the reference 1-rack position of the carriage 3, that is, the 0OTr position.

This configuration is effective immediately after turning on the power to the magnetic recording device for the first time, and when reconfirming the reference track position.

It has the following functions.

The abutting wall 3C, which serves as a stopper means, is unnecessary when used in a normal magnetic recording device, but as described above, for example, if the magnetic recording device receives a severe impact, the carriage 3 imparts a rotational force to the step motor 6 and moves against the holding torque and delay torque of the step motor 6, when the step motor 6 malfunctions due to external noise or the like. It has the role of coming into contact with the pinion 4 and regulating its movement when the pinion 4 loses track of the phase position of the excitation phase due to runaway.

As for the position of the abutment wall 3c as one means of the stopper, the position of the carriage 3c as shown in FIG. It is constructed integrally with the rack 3a, and is determined by its processing accuracy, and it is not difficult for experts in this field to manufacture it to an accuracy of several microns.

In the tjS2 diagram, the carriage 3 is 00 from the inner circumferential side.
When moving toward the Tr position and stopping at the 0CTr position, even if the front carriage 3 overshoots due to the inertia of the rotor of the carriage 3 and the step motor 6, it will not come into contact with the pinion 4. The margin X3 that the wall 3C does not come into contact with is sufficiently zero by subtracting the dead zone area from the torque curve of the step motor 6 mentioned above.
The abutting wall 3C contacts the rotary output shaft 5 including the binion 4 in the area remaining after subtracting the margin X4 for movement toward the OTr position, that is, the shaded area in FIG. This is a position range in which movement of the carriage 3 is restricted.

It goes without saying that the above-mentioned margin X3. Said margin X
Regarding No. 4, the positional accuracy of the abutting wall 3C is sufficient for the required amount.

Regarding the position of the abutting wall 3c as a means for sillage and flange in the above-described structure, (1) First, the absolute position of the carriage 3 with the magnetic head 2 mounted at the required position as described above and the above-mentioned position. The relative positional relationship of the phase positions of the predetermined excitation phases of the step motor 6 is matched, and then the generation position of the track position detection signal as shown in FIG. In combination with the phase position of a predetermined excitation phase, the position where these two conditions are satisfied is adjusted as the reference track position of the carriage 3, that is, the 00Tr position.

(2) By adjusting (2) above, the abutting wall 3c is formed integrally with the carriage 3 and serves as a stopper means.
The position of is inevitably determined, and that's it! Does not require yA adjustment.

Furthermore, after making the adjustment mentioned above, the third
The abutting wall 3C abuts against the rotary output shaft 5 including the binion 4, regulating the movement of the rack 3a, and also moves the binion 4 as shown in FIG. It constitutes a stopper means for regulating the rotation of the mating rotating output shaft 5, that is, for reliably regulating the movement of the carriage 3.

The state in which the magnetic recording device overruns by an angle θ1 and stops, as shown in FIG. In the stopper means for regulating and stopping the movement of the carriage 3, the overrun amount is a small amount.

Incidentally, FIGS. 13 and 15 of the conventional example.

The rack 55 and the binion 54 described above in FIG.
A pressurized spring 5 as a means for applying pressurization to the meshing of the
8. The pressurization structure by the roller 57 prevents vibrations and
ii! When subjected to I, the pressurizing force often ceases to act due to bounces caused by the mass of the structure, resonance of the pressurizing spring 58, etc., and such bounces, resonances, etc. are to be prevented as much as possible. The most appropriate method was to increase the pressurizing force of the pressurizing spring 58; however, increasing the pressurizing force increases the pressurizing force of the step motor 56. The applied friction (loss) increases, the characteristics of the step motor 56 deteriorates, and as a result, the power consumption increases due to the improved characteristics of the step motor 56... This repeats the bad 5S cycle, and is decisive. Although no particular effective measure could be found, the rack 3a of the present invention as shown in FIG.
A magnet 7 disposed on a part of the carriage 3 serves as a means for applying pressurization to the meshing of the pinion 4, and the carriage 3 faces the magnet 7 and is slidable and rotatable twice. is a relatively position fixing means, for example, in combination with a frame 10 containing a magnetic material, a magnetic circuit as shown by the broken line in the figure is constructed, and a structure is applied to pressurize in the direction of the arrow 11. In this case, the system that applies the pressurization has no mass, and there is no resonance of the spring system, thus eliminating the above-mentioned drawbacks.

As described above, in the present invention, the step motor 6 slightly overruns and exceeds the original excitation phase phase position, that is, -2Tr, and reaches the reference track position, that is, 00Tr. The step motor 6 tries to rotate in the 14-Tr direction by being excited to the excitation phase of the position, and on the other hand, the contact wall 3c comes into contact with the rotational output shaft 5 including the binion 4, thereby restricting the movement of the carriage 3. However, they do not have any fatal flaws such as sticking to each other and being unable to move in either direction, resulting in a permanent inability to escape.

In addition, as described above with reference to FIG. 5, as a means to prevent the rack 3a and the binion 4 from disengaging or coming apart, the rack 3a and the binion 4 are brought into contact with the binion 4 from the side opposite to the rack 3a. By providing the contour wall 3e that restricts the separation of the rack 3a and the pinion 4, the meshing phase of the tooth profiles of both the rack 3a and the pinion 4 will not jump or shift, and the compatibility as a magnetic recording device will be lost. It doesn't have any fatal flaws that would cause it to go away.

Next, the mounting of the magnetic head 2 will be explained as shown in FIG.

FIG. 6 is a detailed sectional view of the mounting of the magnetic head in the magnetic head feeding device of the present invention.

The gear ridge 3 described above in FIG. 1 is made of magnetic scrap metal such as a carbon W4 plate, and in FIG.
The magnetic head 2 is mounted on the carriage 3 via a spacer 14 made of, for example, a plastic member and a gimbal 13.

However, even with the prior art, as described above, magnetic recording devices are often constructed with built-in devices that leak magnetism, such as a motor for driving the medium and a transformer, and the magnetic head 2 is capable of absorbing even a small amount of leakage of magnetism. The motor 15 is so sensitive that it reacts sensitively and is affected by it in a different way.If the motor 15 is disposed near the magnetic head 2 as shown in FIG. However, the magnetic head mounting structure of the magnetic head feeding device of the present invention is as shown in Fig. 6. The carriage 3, which is made of magnetic material such as a carbon steel plate, forms a surface surrounding the magnetic head 2, and also forms a peripheral wall 3f surrounding the magnetic head 2. The overall structure is as shown in Figure 1.

The magnetic head 2 of the carriage 3 with the above configuration
The mounting surface has a function of shielding even a slight magnetic leakage of the motor 15 to the magnetic head 2, and further has a function of shielding magnetic leakage from sides of the magnetic head 2 other than the motor 15. , the peripheral wall 3f also has a shielding function, making it unnecessary to use a special magnetic head shielding material to shield the area around the magnetic head 20.

In the present invention, the carriage 3 has been described as having a structure in which the entire carriage 3 is made of, for example, a carbon steel plate, but in this case, the carriage 3 that shields magnetic leakage (a structure) has a structure partially made of, for example, a carbon steel plate. It may be.

Furthermore, regarding the mounting of the magnetic head 2, another embodiment will be described as shown in FIG. 6A.

FIG. 6A is a detailed cross-sectional view of another magnetic head mounted in the magnetic head feeding device of the present invention. What differs from FIG. The only difference is that the shield material 17 is provided as an effective means for improving the performance, and the other configurations are exactly the same as those already described above, and will not be described here.

The above-mentioned carriage 3 mounts the magnetic head 2 via the above-mentioned spacer 14 made of, for example, a plastic member and the gimbal 13.

The spacer 14 is close to the gimbal] 3, and the spacer 14 is close to the gimbal] 3, and
A shield material 17 made of, for example, permalloy material is enclosed in a position surrounding the gimbal 3, that is, it extends substantially in the same plane as the medium 18.

Therefore, the shielding function is proportional to the capacity (area and volume) of the shielding material 17, and in the magnetic head mounting structure of the present invention, it is easy to configure the shielding material 17 with a large capacity. Even if the shielding material 17 has a simple flat plate shape, it exhibits the above-mentioned shielding function, and its manufacturing processability is good.

To explain the shielding function of the shield material 17, the shield material 17 serves as a shield for the head core 2 of the magnetic head 2.
It is placed in a position surrounding b.

It absorbs and shields noise from the side and plane directions of the magnetic head 2.

In addition, when fixing the shield material 17, for example, fixing with double-sided liquid tape or simple adhesive fixing is unnecessary, and the assemblability is very excellent.

In addition, in FIG. 6A, the shield material] 7 is disposed close to the gimbal 13 and enclosed in the spacer 14, but regarding the arrangement of the shield material 17, Even if a close-contact structure is arranged in which the gimbal 13 is overlapped in the same positional direction as shown in FIG. Regardless of the structure, the shielding material 17 exhibits the same shielding function and effect as described above.

Naturally, regarding the above-described shielding function of the magnetic head mounting structure of the present invention, the carriage 3 does not have to be made of magnetic steel, such as carbon steel, as described above.
The required shielding function can be achieved even without the above-mentioned peripheral wall 3f.

Next, the structure of the sliding portion of the carriage 3 will be explained as shown in FIG. 7.

FIG. 7 is a detailed cross-sectional view of the sliding part of the magnetic head feeding device of the present invention. For convenience of explanation, the carriage 3 is divided into two halves and the left and right sides have different configurations, but in reality they are the same and the two configurations are different. expressing.

Similarly to FIG. 6, the carriage 3 described above in FIG. Together, they constitute a guide means, for example, a guided hole 3h formed by press punching, and is slidably and rotatably held on the guide shaft 1 by the guided hole 3h.

By the way, the most important thing about a magnetic recording device is that the track position can be reliably accessed based on a command during recording and reproduction of a medium. The bridge plays an important role, and in particular, ensuring the rigidity of the carriage 3 and preventing wear of the sliding parts is an essential technology. This is a structure that not only ensures sufficient rigidity, but also eliminates the need for special bearings such as metal bushings as described in the prior art in the above-mentioned sliding part, and prevents wear thereof.

On the other hand, in the left half of FIG. 7, the carriage 3 forms a guided hole 3g formed by press sparring, for example, which engages with the guide shaft l and constitutes a guide means. It is slidably and rotatably held on the guide shaft 1.

According to this configuration, as described above, the carriage 3 made of, for example, a carbon steel plate can ensure sufficient rigidity, and the guided hole 3g formed by press sparring, for example, can be is smooth and the guide shaft l
Not only does it eliminate the need for special bearings such as metal bushings as described in the prior art section, but it is also effective as an oil reservoir for the lubricating oil 16, as shown in the left half of FIG. This is the most suitable structure for preventing wear of parts.

Needless to say, the sliding part structure of the present invention can be constructed with the required accuracy by, for example, press processing, etc., simply by using the W-type of this meter.

In the present invention, the carriage 3 has been described as having a structure in which the entire carriage 3 is made of, for example, a carbon steel plate, but the sliding part structure of the present invention may be partially formed.

Next, an application example of the present invention will be explained based on FIG. 8.

FIG. 8 is a diagram showing another example of application of the magnetic head feeding device of the present invention, and the difference from FIG. The only difference is the relationship, and the other configurations are exactly the same as those already explained, so they will not be discussed here.

In Fig. 8, as mentioned above in Fig. 1, the slidable 2
The rotatable carriage 3 is made of a magnetic material such as a carbon steel plate, and serves as means for fixing the position relative to the carriage 3, and has a magnet 7a disposed on a frame 10 or the like facing the carriage 3. A magnetic circuit as shown by the broken line arrow in the figure is configured to apply pressurization in the direction of the arrow 11a.

The applied example of the present invention having the above configuration has exactly the same functions and functions as the previously described embodiment of the present invention, and the particular advantage of this applied example is that the carriage By effectively utilizing the fact that the magnet 7a is made of a magnetic material such as a carbon steel plate, the magnet 7a is fixed in position relative to the carriage 3,
By disposing the carriage 3 on the opposing frame 10, for example, it is possible to reduce the weight of the carriage 3, although slightly, and improve the efficiency of the step motor 6. is reduced.

In the embodiment of the present invention shown in FIG. 1 and the applied example of the present invention shown in FIG. It goes without saying that it is possible to construct a pressurizing force similar to the pressurizing force already described above by applying force (not shown). A stopper means that comes into contact with the rotary output shaft 5 including the pinion 4 from the moving direction of the carriage 3 and restricts the movement of the carriage 3 will be described with reference to FIGS. 9 and 10.

FIGS. 9 and 10 are diagrams showing other application examples of the magnetic head feeding device of the present invention, and are diagrams for explaining the aforementioned stopper means, and the two diagrams are related.

FIG. 9 shows the rack 3a when the binion 4 is rotated.
This is to explain the relative movement relationship between the rack 3a and the rack 3a for the convenience of the explanatory drawing. This is a projected drawing.

The planetary movement process of the binion 4 is shown by the ll1ll line, and the state in which the binion 4 is in rotational contact with the abutment wall 3ca from the rotational direction on one side, and is engaged with the rack 3a on the other side is shown by the solid line in the figure. It is shown in

FIG. 9 shows the following steps: (1) Rotating the binion 11 and moving the rack 3a.
The pinion 4 was brought into contact with the contact wall 3ca.

(2) The rack 3a was moved, the binion 4 was rotated, and the binion 4 was brought into contact with the contact wall 3ca.

It shows two modes.

It would be good if the rotation of the binion 4 and the movement of the rack 3a could be stopped in the state where the binion 4 is shown by the solid line in FIG. The amount of overrun can be controlled to a very small amount by adjusting the dimensions at various locations.

Two modes that stop after a slight overrun,
This will be explained with reference to FIG.

FIG. 10 shows a state in which the rotation of the binion 4 and the movement of the rack 3a are stopped, and the dashed line A indicates the state in which the binion 4 is in the required meshing state with the front two binions 4 and the rack 3a. This is a line indicating center position 2.

For convenience of explanatory drawings, the rack 3a is shown fixed in position and the binion 4 is moved, but originally it is the opposite, and the rack 3a is moved while the rack 3a is fixed in position.・It is something.

First, from the state of (■) above, further move the binion 4 to the arrow 2 in the figure.
When rotated in the direction 3c, the front pinion 4 applies rotational movement force to the rack 3a using the abutting contact ri3ca as a fulcrum, and rotates in the direction of the arrow 11 described above in FIG. The rack 3a, that is, the carriage 3, is moved by an amount indicated by h2 in FIG. 10 against the pressurization of It rotates, and on the other hand it comes into contact with the - section 3eal of the contour wall 3ea mentioned above in FIG. 5 and stops.

This stop mode is effective when the step motor 6 malfunctions due to external noise or the like and runs out of control and regulates its own rotation. It does not stop instantaneously, but when it stops as described above, it also exerts a slight damper effect.

(2) Even if a force for moving the carriage 3 is further applied from the state (2) above, the carriage 3 is moved to the abutting wall 3.
ca is in contact with the pinion 4 from the direction of movement of the carriage 3 described above, and becomes unable to move any further.

On the other hand, when the carriage 3 moves rapidly due to, for example, severe vibration or shock as a process leading to the state (2), the carriage 3, i.e., the abutment wall 3ca is moved against the pinion 4 in the moving direction of the carriage 3. Even though the pinion 4 is in contact with the contact wall 3ca and cannot move any further, it is unable to stop suddenly due to the inertia of its rotating system, and the pinion 4 remains in contact with the contact wall 3ca. Continuing the rotation, on the other hand, applying rotational force to the rack 3a,
The rack 3a, that is, the carriage 3, is moved by an amount indicated by h2 in FIG. 10 against the pressurization in the direction of the arrow 11 described above in FIG. It rotates in the direction of the arrow 23c by an angle θ2 in the figure, and on the other hand, a part of the front two binions 4 is brought into contact with a part 3eal of the contour wall 3e mentioned above in FIG. When the rotation is stopped, the movement of the carriage 3 is also stopped.

Naturally, at the time of stopping, the pinion 4 and the rack 3a are engaged with each other, albeit irregularly.

As previously described in FIG. 5, this stop mode is effective when, for example, the carriage 3 moves violently along the guide shaft 1 due to severe vibration or shock, and the movement of the carriage 3 is restricted. In addition, unlike the prior art, the pinion does not stop instantaneously following the instantaneous stop of the carriage, but when the above-mentioned stop occurs, a slight damper effect is generated as in (11). (do.

It has a structure in which the movement of the carriage 3 is restricted and the rotation of the pinion 4 is stopped with a slight overrun. contour'i
Together with 3e and a, it constitutes a stopper means for regulating the movement of the carriage 3.

Incidentally, the above explanation is based on the rack 3a, the abutment wall 3ca,
Although the above-mentioned contour wall 3ea has been explained with reference to the diagram in which the contour wall 3ea is configured on the same plane, in the stopper means of the magnetic head feeding device of the present invention, the three relationships are configured in mutually different planes, and the three relationships and the relationship are different from each other. Regarding the binion 4 and the rotary output shaft 5, the binion 4 is attached to the rack 3a, and the binion 4 is attached to the abutting wall 3ca.
Further, even if the rotary output shaft 5 and the binion 4 are made to correspond to the contour wall 3ea, respectively, it is possible to obtain the same effect as the above-mentioned stopper means. (Not shown) Next, in another application example of the present invention, a rotary output shaft 5 including the binion 4 is brought into contact with both ends of the rack 3a from the moving direction of the carriage 3, A stopper means for regulating rotation will be explained.

FIGS. 11 and 12 are diagrams showing another example of application of the magnetic head feeding device of the present invention, and are diagrams illustrating the above-mentioned stopper means, and the two diagrams are related.

FIG. 11 shows the rack 3 when the binion 4 is rotated.
This is to explain the relative movement relationship with A, and for convenience of the explanatory drawing, the rack 3a is fixed in position and the binion 4 is planetarily moved on the dashed line A while rotating in the direction of the arrow 23 in the figure. This is a drawing in which the locus is projected.

The planetary movement process of the pinion 4 is shown by a thin line, and the pinion 4 rotates in contact with the protrusion 3cl provided on the abutment wall 3c from the rotational direction on one side, and meshes with the rack 3a on the other side. The state is shown by a solid line in the figure.

FIG. 11 shows: (1) The binion 4 is rotated to move the rack 3a and bring the binion 4 into contact with the protrusion 3cl.

(2) The rack 3a was moved, the binion 4 was rotated ', and the binion 4 was brought into contact with the protrusion 3cl.

It shows two modes.

It would be good if the rotation of the pinion 4 and the movement of the rack 3a could be stopped in the state where the pinion 4 is shown by the solid line in FIG. The amount of overrun can be controlled to a certain degree by adjusting the dimensions of various parts.

Two modes that stop after a slight overrun,
This will be explained with reference to FIG.

FIG. 12 shows a state in which the rotation of the pinion 4 and the movement of the rack 3a are stopped, and the dashed line A indicates the state in which the pinion 4 and the rack 3a are in the required meshing state.
This is a gland that indicates the center position of the binion 4.

For the convenience of explanatory drawings, the drawing shows the rack 3a fixed in position and the binion 4 moved, but originally it is the opposite, and the rack 3a is moved while the binion 4 is fixed in position. It is.

First, from the state of (■) above, further move the binion 4 to the arrow 2 in the figure.
When rotated in the direction 3a, the pinion 4 applies a rotational force to the protrusion 3cl in the abutting state, and the rack 3a resists the pressurization in the direction of the arrow 11 described above in FIG.
That is, the carriage 3 is moved by the amount shown by hl in FIG. 12, and rotated by the rotatable angle θ1 in FIG. 12 in the direction of the arrow 23a due to this movement, and Part 3e of the aforementioned contour wall 3e
It comes into contact with l and stops.

The stop motor ° is effective when the step motor 6 malfunctions due to external noise, for example, and runs out of control, and regulates its own rotation, and is also effective when the step motor 6 is driven out of control by the carriage that stops instantaneously, as in the prior art. The pinion also does not stop instantaneously, and when it stops as described above, it also exhibits a slight damping effect at the time of the stop.

(2) Based on the above-mentioned (2), when a force for moving the carriage 3 is further applied, the carriage 3, that is, the rack 3a rotates the binion 4 in the direction of the arrow 23a in the figure, and on the other hand, Then, a rotational force is applied to the protrusion 3c1 in the abutting state, and the rack 3a, that is, the carriage 3 is moved to hl in FIG. 12 against the pressurization in the direction of the arrow 11 mentioned above in FIG. Move by the amount shown
J, and the twelfth rotatable by the movement.
The binion 4 is rotated in the direction of the arrow 23a by an angle θ1 in the figure, and on the other hand, the contour described above in FIG. A part of the pinion 4 is brought into contact with a part 3el of the pinion 23e, and the rotation of the pinion 40 is stopped and the movement of the carriage 3 is also stopped.

Naturally, at the time of the stop, the pinion 4 and the rack 3a are irregularly engaged with each other.

As previously described in FIG. 5, this stop mode is effective when, for example, the carriage 3 moves violently along the guide shaft 1 due to severe vibration or shock, and the movement of the carriage 3 is restricted. In addition, the pinion does not stop instantaneously following the carriage that stops instantaneously as in the prior art, but when it is stopped as described above, a slight damper effect is also exerted as in (2).

It has a structure that causes a slight overrun in regulating the 40 revolutions of the vinyl off and also causes a slight overrun to stop the movement of the carriage 3, and the first abutting wall 3c is The rack 3a
Together with the contour wall 3e and the contour wall 3e, it constitutes a stopper means for regulating the rotation of the pinion 4.

Incidentally, the above explanation has been made with reference to a diagram in which the rack 3a, the abutting wall 3c, and the contour wall 3e are arranged on the same plane, but in the stopper means of the magnetic head feeding device of the present invention, The three relationships are arranged on planes that are different from each other, and in view of the binion 4 and the rotation output shaft 5 that are related to the three relationships, the binion 4 is attached to the rack 3a, and the binion 4 is attached to the abutting wall. 3c has front 9 self-rotating output shaft 5
Even if the ring S wall 3e is configured to have an uneven shape, for example, or a planted bottle, etc., is attached to the ring S wall 3e corresponding to all the riiJ output shafts, the same effect as the above-mentioned stopper means can be obtained. is possible. (Illustrations omitted) [Effects of the Invention] As described above, the present invention has a number of practical effects as described in the embodiments of the present invention.
In particular, the mounting structure of the magnetic head in the magnetic head feeding device of the present invention has a simple structure and constitutes a shielding function to shield magnetic noise, and the above-mentioned shielding material has a simple shape and is easy to manufacture. Moreover, when arranging the shielding material, it is easy to assemble and facilitates the mass production of inexpensive magnetic recording devices, as well as completely eliminating compatibility as a magnetic recording device. In addition, the present invention eliminates fatal defects such as data loss and facilitates automation as well as mass production of inexpensive and highly reliable magnetic recording devices. The numerous practical effects are extremely large.

[Brief explanation of drawings]

Figure 1, Figure 2, Figure 3, Figure S4, Figure 5, Figure 6
Figures 6A, 8, 9, 10, 11, and 12 show the most suitable embodiment of the magnetic head feeding device of the present invention. It is a figure which shows the other application example of. FIG. 1 is a perspective view of the main part of the magnetic head feeding device of the present invention, and FIG. 2 is a diagram illustrating the regulation of its movement. FIGS. 3 and 4 are diagrams for explaining the switch means. FIG. 5 is a diagram illustrating the relationship between the rack and the binion of the magnetic head feeding device of the present invention, FIG. FIG. 3 is a detailed sectional view of a sliding portion of the magnetic head feeding device. FIG. 68 is a detailed cross-sectional view of the magnetic head feeding device of the present invention in which the magnetic head is mounted.
The figure shows yet another application example of the magnetic head discarding device, and FIGS. It is a figure explaining the application example of. 13 to 18 are diagrams illustrating a conventional example, FIG. 13 is a perspective view of a main part of a conventional magnetic head feeding device, and FIG. 14 is a diagram illustrating regulation of the transfer fi#. It is. 15 and 16 are diagrams for explaining the relationship between the rack and the pinion, FIG. 17 is a detailed cross-sectional view of the mounting of the magnetic head, and FIG. 18 is a detailed cross-sectional view of the RI moving part. 1, Guide shaft 3, Carriage 3a, Rack 3b, 3c, Contact wall 321. , 8100 Contour wall 3f, , Surrounding wall 3g, 3h, Guided hole 4, Binion 5, Rotation output shaft 6, , , , Step motor 7 , Magnet 7 a , Magnet 10 , Frame 17 , One or more shielding materials Applicant: Seiko Epson Corporation Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6A Figure 5S Figure 6: 58, 3) 10 Figure 60 Good Figure 13 Figure 14 Figure 15 Cause Figure 16

Claims (1)

[Scope of Claims] 1) It has a guide means and a sliding means that is slidably engaged with the guide means, and a carriage that is slidably held in the direction of the guide means is magnetically moved through a gimbal. In a magnetic head feeding device that mounts a head and reciprocates the magnetic head in the direction of the guide means by following the articulation of the articulation drive means, the head core of the magnetic head extends substantially in the same plane as the gimbal. 1. A magnetic head feeding device comprising: a shielding member disposed close to the gimbal and surrounding the gimbal. 2) The magnetic head feeding device according to claim 1, wherein the shield material is disposed closely to the gimbal.