JPS63302414A - Head mechanism for magnetic recorder - Google Patents

Abstract

PURPOSE:To improve reliability and to lower a cost, by setting contact relation between a magnetic medium and a magnetic head at desired position relation by adjusting the deflection of an FPC (flexible printed circuit board). CONSTITUTION:The fixing structure of the FPC 5 on a carriage 3 is constituted of a projecting part 3a provided at a part of the carriage 3 and a through hole 5b provided at a part of the FPC 5, and also, the tip part 3b of the projecting part 3a is constituted larger than at least a part of the hole width of the through hole 5b. Therefore, it is possible to stabilize the FPC 5 and to arrange it surely and easily so as to set the contact between the magnetic head 1 and the magnetic medium 2 at the desired position relation. In such a way, a magnetic recorder with high performance, high reliability, and a low cost can be obtained.

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.

[Prior Art] Fig. 5, Fig. 6, and Fig. 7 are diagrams explaining a conventional example, in which Fig. 5 is a cross-sectional view of the head a#IF in the αq plane, and Fig. 6 is a flexible printed circuit board (hereinafter referred to as FIG. 7 is a front sectional view of the FPC fixing part.

Reference numeral 11 denotes a magnetic head that performs recording and reproducing in close contact with the magnetic medium 2, and the magnetic head 1
It is fixed to the carriage 13 via a plate spring material 14 having a flexibility that allows the robot 1 to follow the movement.

15 is an FPC with one end fixed to the leaf spring material 14;
Furthermore, it is fixed to the carriage 13 with a fixing portion 15a.

6 and 7 show the fixing part 15 of the FPC 15.
FIG. 3A is a diagram showing a main part of FIG. 1A, in which the FPC 15 is fixed to the carriage 13 by fitting an arm 13a protruding from the carriage 13 with a hole 15b of the FPC.

In the method for fixing the structure as described above, the FPC 15 is deflected due to component variations and assembly variations, and the leaf spring material 14 is deformed due to the deflection. Therefore, the close contact between the magnetic medium 2 and the magnetic helad 11 becomes unstable, making it difficult to obtain stable recording and reproducing performance.

Furthermore, since the arm portion 13a has a substantially simple forward shape, the FPC 15 and the carriage 13 are easily separated due to deflection of the FPC 15, and their fixation is unstable. Furthermore, in order to ensure reliable fixing in such a structure, a structure in which adhesive is applied to the fixing portion has also been adopted.

Furthermore, in order to position the head 11 at a stable recording/reproducing position as shown by the broken line in FIG.
5 so that the deflection force of FPC 15 does not affect the
The placement of the magnetic head was performed by making delicate adjustments by bending or otherwise shaping the magnetic head.

Therefore, assembly is very difficult and costly, and
Obtaining reliable recording and playback performance has not been easy.

[Problems to be Solved by the Invention] As mentioned above, the head mechanism of the conventional magnetic recording device having the structure described above has the problems of low device reliability and high device cost. there were.

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, and its purpose is to provide a highly reliable and low-cost head mechanism for a magnetic recording device.

[Means for Solving the Problems] The head mechanism of the magnetic recording device of the present invention is fixed to a carriage that moves relative to the magnetic medium via a flexible leaf spring material, A head mechanism of a magnetic recording device comprising: a magnetic head that performs recording/reproduction by closely contacting one surface of the magnetic medium; and a flexible printed circuit board having one end fixed to the plate spring material and a part fixed to the carriage. In this, the structure for fixing the flexible printed circuit board to the carriage is composed of a protrusion provided in a part of the carriage and a through hole provided in a part of the flexible printed circuit board, and a tip of the protrusion It is characterized in that the portion has a width larger than the hole width of at least a part of the through hole.

[Embodiment] FIGS. 1, 2, and 3 are diagrams showing an embodiment of the present invention, in which FIG. 1 is a side sectional view of the head mechanism,
The figure is a plan partial sectional view of the FPC fixing part, and FIG. 3 is a front sectional view of the FPC fixing part as seen from arrow P in FIG. FIG. 4 is a diagram showing an application example of the present invention, and is a partial cross-sectional plan view of the FPC fixing part.

Reference numeral 1 denotes a magnetic head that performs recording and reproduction while being in close contact with a magnetic medium 2, and is fixed to a carriage 3 on which the magnetic head 1 is placed via a flexible plate spring material 4. The leaf spring material 4 is flexible so as to ensure good contact between the magnetic head l and the magnetic medium 2, even against undulations caused by the rotation of the magnetic medium 2, and to obtain stable recording and reproduction. It is possible to bend in any direction.

5 guides the electrical signal taken out from the magnetic head to a circuit board (not shown) that controls the magnetic recording device.
One end is fixed to a part 4a of the leaf spring material 4 using FPC, and further fixed to the carriage 3 by a fixing part 5a for positioning on the carriage 3.

2 and 3 are diagrams showing the main parts of the fixed part 5a of the carriage 3 of the FPC 5, and the long part 5 of the FPC 5 is attached to the arm part 3a protruding from the carriage 3.
By having a drinking party, the FPC 5 is fixed to the carriage 3.

The width of the arm portion 3a in the short width direction of the FPC long hole portion is equal to or slightly larger than the short width of the long portion 5b, so that the FPC 5 is elastically distorted after being heated. Then, the arm portion 3a is F by the FPC elastic force due to distortion.
The FPC 5 is held at a predetermined position on the carriage 3 by being held by the PC 5 .

Further, a head portion 3b having a width larger than the above-mentioned arm width is provided at the tip of the arm portion 3a, and the long portion 5b of the FPC 5 is bent to open the arm portion 3a of the carriage 3.
After the drinking party, the FPC 5 is locked to the head 3b and securely fixed to the carriage 3, and will not come off.

Furthermore, the relative position between the FPC 5 and the carriage 3 is as follows:
The long portion 5b is aligned with the arm portion 3a in the direction of arrow Q in FIG.
It can be freely adjusted by sliding it in the direction, and the elastic force of the FPC 5 allows the FPC to
Since the arm portions 5 are holding the arm portion 3a, it is possible to easily hold the arm portion 3a at the adjusted position.

Therefore, as shown by the broken line in FIG. 1, the bending of the FPC 5 caused by component variations, assembly variations, etc. causes the deformation of the leaf spring material 4 due to its flexibility, causing the magnetic medium 2 to be damaged. The disadvantage of deterioration in recording and reproducing performance due to unstable adhesion of the magnetic head 1 is that when fixing the FPC 5 to the carriage 3, the elongated hole 5b is slid to adjust the deflection of the FPC 5. This makes it easy to bring the magnetic medium 2 and the magnetic head 1 into a desired positional relationship, and it is possible to improve the recording and reproducing performance very easily.

Further, around the edge of the long portion 5b of the FPC 5, a metal such as a copper foil 5c of the same quality as the FPC pattern is disposed, for example, to prevent deterioration such as cracking of the FPC due to bending force of the FPC 5. At the same time, the FPC 5 can be more firmly fixed to the carriage 3 due to the effect of increasing the bending force.

In this embodiment, the long portion 5b of the FPC is
Although the shape of the PC5 is long in the longitudinal direction, depending on the shape of the FPC5 and the FPC arrangement method, the fourth
As shown in Figures (a) and (b), it is also effective to provide a long hole so that it has a long width, perpendicular to the longitudinal direction of the FPC or at an angle.

[Effects of the Invention] As described above, according to the present invention, the FPC is fixed to the carriage by the protrusion of the carriage and the through hole of the FPC, and the tip of the protrusion is connected to the through hole of the through hole. By configuring the FPC to have a width larger than at least a part of the hole width, it is possible to stably, reliably, and easily arrange the FPC so as to achieve the desired close contact between the magnetic head and the magnetic medium. Therefore, it is possible to provide a high-performance, highly reliable, and low-cost magnetic recording device.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1, 2, and 3 are views showing one embodiment of the present invention, in which FIG. 1 is a side cross-sectional view of the head'a structure, and FIG. FIG. 3 is a partial front sectional view of the fixing part. FIG. 3 is a front sectional view of the FPC fixing part. FIG. 4 is a diagram showing another embodiment of the present invention, in which an FPC
FIG. 3 is a partial plan view in cross section of the fixing part. FIGS. 5, 6, and 7 are diagrams for explaining conventional examples, in which FIG. 5 is a side partial sectional view of a conventional head mechanism, and FIG. 6 is a plan partial sectional view of an FPC fixing part. FIG. 7 is a front sectional view of the FPC fixing part. 1・・・・・・・・・・・・・・・Magnetic head 3
・・・・・・・・・・・・・・・・・・ Carriage 4・
・・・・・・・・・・・・・・・・・・Plate spring material 5...
・・・・・・・・・・・・・・・Applicant for FPC or above Seiko Epson Corporation Figure 1 Figure 2 Figure 4 (α) Figure v44 (b)

Claims (1)

[Claims] A magnetic head that is fixed to a carriage that moves relative to the magnetic medium via a flexible plate spring material and performs recording and reproducing in close contact with one surface of the magnetic medium, and the plate. In a head mechanism of a magnetic recording device comprising a flexible printed circuit board having one end fixed to a spring material and a part fixed to the carriage, a structure for fixing the flexible printed circuit board to the carriage is fixed to a part of the carriage. and a through hole provided in a part of the flexible printed circuit board, and the tip of the protrusion has a width larger than the width of at least a part of the through hole. Features of the head mechanism of a magnetic recording device.