JPS6390010A - Head mechanism for magnetic recording device - Google Patents

Abstract

PURPOSE:To reduce the number of parts with a simple constitution and to surely protect a plate spring material at low cost by arranging a stopper means for regulating the deflection of a plate spring material for supporting a head in the deflecting direction. CONSTITUTION:The magnetic head 1 is supported by the flexible plate spring material 2 and tightly stuck to a recording medium 6 together with an arm pressing member 5 for an arm 4. An approximately cylindrical body 7 for regulating the deflection of the plate spring material 2 including the deflection of the spring material 2 due to the pressing member 5 is arranged under the spring material 2. When the deflection of the spring material 2 exceeds a prescribed value due to shock or the like, the spring material 2 is abutted on the approximately cylindrical body 7 to regulate the deflection and release the shock to a carriage 3. Thereby, the constitution can be simplified, the number of parts can be reduced and the spring material can be surely protected at low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a head mechanism in a magnetic recording device.

[Conventional example]

The head mechanism of a conventional magnetic recording device is disclosed in Utility Model Application Publication No. 59-142.
938 and JP-A No. 60-25050, 7
The means for regulating the deflection of the leaf spring material on which the magnetic head is mounted by more than the necessary amount is to install a stopper plate over a wide range of the spring material in the vicinity of the surface of the leaf spring material opposite to the surface on which the magnetic head is mounted. It was set up and configured.

[Problem that the invention seeks to solve]

In the head mechanism of the conventional magnetic recording device having the above-described structure, the stopper plate is provided over a wide range of the leaf spring material. Since it has to be placed on the opposite side of the plate and a large number of said parts are arranged in a small space, the shape of each of said parts becomes very complex and expensive.

Furthermore, the wiring process such as soldering or adhesion of the lead wire, which is configured as a means for controlling electrical continuity between the magnetic head and the outside and is arranged on the surface of the plate spring material on the stopper plate side, can be done in a very small space. This process is difficult and time-consuming, and is a factor contributing to the high cost of the magnetic recording device as a whole.

Furthermore, when the leaf spring material comes into contact with the stopper plate due to various disturbances, the leaf spring material and the stopper plate come into surface contact over a wide area, which reduces the degree of freedom in the torsional direction of the leaf spring material. In the recording and reproducing state, the magnetic head was unable to follow the surface undulations caused by the rotation of the magnetic medium, and the close relationship between the magnetic medium and the magnetic head was not maintained, making stable recording and reproducing impossible. It also had some problems.

Therefore, the present invention solves the above problems.
The purpose is to provide an inexpensive and high-performance magnetic recording device.

[Means for solving problems]

The magnetic recording device of the present invention has a magnetic head that is fixed to a carriage that moves in the radial direction of a magnetic medium via a flexible leaf spring material, and that performs recording and reproduction while being in close contact with one surface of the magnetic medium. and is disposed on an arm rotatably supported by the carriage, and in close contact with the other surface of the magnetic medium at a position facing the magnetic head, the magnetic medium is urged by at least the biasing force of the arm. In a head mechanism of a magnetic recording device 1 comprising a pressing means having a function of pressing against the magnetic head, (1) the pressing means is pressed at a position within a projection plane of a surface of the magnetic head that is in close contact with the magnetic medium; A stopper means for regulating the deflection of the leaf spring material is provided at a position separated by a predetermined slight gap in the direction of deflection, including the amount of deflection of the leaf spring material deflected by the pressing force of .

(2) The stopper means is characterized in that the shape is substantially columnar.

(3) The stopper means is disposed between the arm and the pressing means.

〔Example〕

FIG. 1 is a diagram showing one embodiment of the present invention, and is a side sectional view showing the main part of the head mechanism in a recording/reproducing state.

The magnetic head 1 is fixed to a carriage 3 via a flexible plate spring material 2, and is rotatably supported by the carriage 3 (not shown) to apply an urging force in the direction of the magnetic head 1. The magnetic medium 6 is brought into close contact with one surface of the magnetic medium 6 by a pressing member 5 as a pressing means disposed along the arm 4 to maintain the recording and reproducing state.

In the recording/reproduction state, the leaf spring material 2 is bent in the direction of the biasing force by a predetermined amount depending on the magnitude of the biasing force due to the bias of the arm 4, and the plate spring material 2 is bent by a predetermined amount depending on the magnitude of the biasing force. The tip 7α of the substantially columnar body 7, which is integrally disposed to protrude from the magnetic head 3 toward the direction 2, is attached to the surface of the leaf spring material 2 opposite to the surface on which the magnetic head 1 is mounted in the bent state. It is located in a space separated by a small predetermined gap.

A magneto-electric conversion coil 8 is fixed to the front surface of the plate spring material 2 on the side of the substantially columnar body 7, using a gap between the plate spring material 2 and the carriage base portion 3α. Since there is no need to pack the magneto-electric conversion coil into a space, it is possible to construct the magneto-electric conversion coil with a simple shape, low cost and easy to assemble.

The coil terminal portion 8α of the magnetoelectric conversion coil 8 is fixed to, for example, a flexible printed circuit board 10 fixed to a part of the plate spring material 2 by soldering or the like while maintaining electrical continuity, and furthermore, the magnetic recording device is The recording/reproducing function of the magnetic head 1 is configured by establishing conduction with a controlling circuit board (not shown).

Since the aforementioned coil terminal 8α is soldered using the gap between the carriage base portion 3α and the plate spring material 2, the soldering work is significantly facilitated, the assembly is easy, and the cost of the magnetic recording device is reduced. Not only can the coil terminal 8α come into contact with an unexpected location and disconnection, but reliability can be improved.

FIG. 2 is a schematic diagram of the lower part of the carriage in this embodiment, showing the standby state of the carriage before and after recording and reproduction.

In the standby state, the arm 4 engages with the holder 9, which receives and holds the disk cartridge 6α containing the magnetic medium 6 into the magnetic recording device and moves to the recording/reproducing position, so that at least the magnetic head 1 and the It is waiting at a position with a gap equal to the thickness of the disc cartridge 6α between it and the pressing member 5.

As the holder 9 holds the disk cartridge 6α and moves to the recording and reproducing position, the pressing member 5 approaches the magnetic head 1, and in the recording and reproducing position, the magnetic head is pushed by the biasing force of the arm 4. 1 as well as the magnetic medium 6.

FIG. 3 shows that the pressing member 5 collides with the magnetic head 1 via the magnetic medium 6 during the process in which the suppressing member 5 approaches the magnetic head 1 as the holder 9 moves to the recording/reproducing position. FIG. 3 is a schematic side sectional view of the head mechanism at the time of a collision, showing an instantaneous state.

When the pressing member 5 collides with the magnetic head 1, the impact force due to the collision is transmitted to the leaf spring material 2 via the magnetic head 1, so that the leaf spring material 2 is in the above-mentioned recording and reproducing state. It will deflect in the direction of the substantially columnar body 7 by more than the amount of deflection.

When the deflection of the leaf spring material 2 becomes slightly larger than the deflection in the recording and reproducing state by a predetermined amount, the leaf spring material 2 comes into contact with the tip 7α of the substantially columnar body 7, and further deflection is restricted.

In the case where the impact force is free in the deflection direction, that is, when the substantially columnar body 7 is not present, depending on the shape of the leaf spring material 2, it may be sufficient to plastically deform the front plate spring material 2 and cause it to break. Although there is a great risk of making regeneration impossible, by bringing the plate spring material 2 into contact with the substantially columnar body 7 and regulating the deflection, the impact force can be reduced to the plate spring material 2.
from the substantially columnar body 7 to the carriage 3.
This makes it possible to protect the leaf spring material 2 from the impact force during the recording/reproducing movement described above.

Further, the contact portion of the leaf spring material 2 with the substantially columnar body 7 is located approximately in the center of the magnetic head 1 and has a very small area, and even in the contact state, the leaf spring material 2 is twisted. Deflection in the direction is possible as a fulcrum at the front joint. Therefore, in the above-mentioned recording/reproducing state, even if the front spring member 2 comes into contact with the substantially columnar body 7 due to a disturbance or the like, the magnetic head is 1 is a fulcrum point at the front contact portion of the plate spring material 2, and the magnetic medium 6 and the magnetic head 1 are sufficiently followed by the deflection according to the undulations.
A close relationship with the recording medium is reliably maintained, allowing stable recording and playback.

Further, it is also possible to easily obtain the same effect as described above by providing the above-described structure of the plate spring material 2 and the substantially columnar body 7 on the side of the arm 4 and the pressing member 5.

Furthermore, the pressing member 5 is mounted on the shaft 3,
It is also easily possible to mount the magnetic head 1 on the arm 4.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to realize a head mechanism that has a simple structure, is inexpensive, and can perform stable recording and reproduction.
As a result, it is possible to provide an inexpensive and high-performance magnetic recording device.

[Brief explanation of the drawing]

1, 2, and 3 are views showing one embodiment of the present invention, in which FIG. 1 is a sectional view of the main part of the head mechanism in a recording/reproducing state, and FIG. 2 is a main part of the carriage. FIG. 3 is a schematic side sectional view of the head mechanism at the time of collision. 1... Magnetic head 2... Leaf spring material 3... Carriage 4... Arm 5... ...... Pressing member 6 ... Magnetic medium 7 ...... Substantially columnar body (b) Fig. 1 Fig. 2

Claims (3)

[Claims] (1) A magnetic head that is fixed to a carriage that moves in the radial direction of a magnetic medium via a flexible plate spring material and that performs recording and reproduction while closely contacting one surface of the magnetic medium; The magnetic medium is disposed on a rotatably supported arm, and is in close contact with the other surface of the magnetic medium at a position facing the magnetic head, so that the magnetic medium is directed toward the magnetic head by at least a biasing force of the arm. In a head mechanism of a magnetic recording device comprising a pressing means having a pressing function, the plate spring material is deflected by the pressing force of the pressing means at a position within a projected plane of a surface of the magnetic head that is in close contact with the magnetic medium. A head mechanism for a magnetic recording device, characterized in that stopper means for regulating the deflection of the leaf spring material is provided at a position separated by a predetermined small gap in the direction of deflection. (2) A head mechanism for a magnetic recording device according to claim (1), wherein the stopper means has a substantially columnar shape. (3) The stopper means is disposed between the arm and the pressing means.
A head mechanism of a magnetic recording device according to items () and (2).