JPS6272015A - Electric power feeding mechanism - Google Patents

Abstract

PURPOSE:To omit troublesome operation such as soldering without requiring complex constitution for a swing actuator which swings a body to be driven by winding a flexible printed circuit which is formed spirally around a shaft and coupling a printed board with a bobbin through it. CONSTITUTION:The shaft 4 on a body 2 is wound with the electric power feeding F.P.C (flexible printed circuit) 14 which is formed clockwise spirally. One terminal of the F.P.C is coupled with a driving coil 6 through a connector 16 and the other terminal part 17 is coupled with the printed board 20 provided to a fixed part through another connector 18. When the swing actuator is in operation for accessing a magnetic disk, an arm 10 swings around the shaft 4 as shown by an arrow, but when the power source is turned off and its current is cut off, the arm 10 rotates clockwise with the elastic reaction force of the F.P.C formed in a spiral spring shape and stops abutting on a stopper 22, so that the arm 10 is easily returned to a specific home position, i.e. a CCS zone in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a power feeding mechanism. More specifically, the present invention relates to a power supply mechanism for a swing actuator used in a magnetic disk drive or the like.

(B) Prior art In conventional swing actuators used for magnetic disks, etc., when the current is cut off for some reason, while the head is floating above the magnetic recording disk, It is necessary to move the head to a position where there is no problem even if the disc and the head come into contact with each other. For this reason, a configuration has been used in which a spiral spring or a solenoid is provided in addition to the power supply means to move the hemi-coupling member in a predetermined direction when current is not supplied.

An example is shown in FIG. A helical spring 30 is wound around the shift 4 provided on the swing actuator, and a lead wire 32 is soldered to the coil 6 arranged on the bobbin 8 34
connected by being connected. The swing actuator rotates in the direction of the arrow due to the elastic force of the helical spring.
The stop/pa 22 restricts the interlocking in one direction.

(c) The problem to be solved by the invention is that in the above configuration, a spiral spring or a solenoid ring must be provided separately from the power supply means, and the complicated soldering 34 must be performed. ) to the printed circuit board 20, there were problems such as high installation costs.The present invention solves these problems. purpose.

(d) Means and operation for solving the problem Therefore, in consideration of the above-mentioned section 8, the present invention improves the conventional example in which the means for power supply and the means for moving up and down are provided separately, and both means are improved. A new method that also serves as a spiral spring-shaped power supply flexible, printed, circuit (F, P, C)
The present invention provides means for winding the heel around the shaft, thereby making it possible to easily move the heel to a predetermined position when the current is cut off.

(e) Examples An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of the swing actuator, in which a shaft 4 is provided approximately at the center of the swing actuator body 2. A bobbin 8 equipped with a driving coil 6 is provided at one end of the body 2, and a helad 12 is provided at the other end arm IO.

Power supply F, P, C (flexible, printed, circuit) 14 formed in a spiral spring shape are wound clockwise around the shaft 4 of the body 2-H. F, P for power supply.

C(7) One end 1i is connected to the driving coil 6 via the connector 1G, and the other end 17 is connected to the printed circuit board 2o provided on the fixed part by another connector 18. 22 is a stopper provided close to the arm 10 so as to maintain a predetermined distance therebetween.

FIGS. 2 and 3 illustrate spiral springs F, P, and CI4 used in the present invention. plastic film 26
By forming a plurality of strips of steel foil 24 coated with a spiral spring into a spiral spring shape, one uninvented power supply F, P, and C can be made.

When the swing actuator accesses the magnetic disk, the arm 10 swings about the shaft 4 in the direction of the arrow, but when the W source is turned off and the current is cut off, the power supply F formed in the spiral spring , P, C, the arm 10 rotates clockwise, and the stopper 22
It comes into contact with and stops. In this way, the arm 10 can be easily moved to the predetermined position of the position C8S in a short time.
You can return to the zone.

(F) Effects of the Invention In the present invention, when the current is cut off, the movable part of the swing actuator is moved by the elastic force of the spiral spring made of the power supply F, P, and C wound around the shaft of the swing actuator. It can be quickly returned to its original position, does not require a complicated configuration unlike conventional examples, and uses a connector to connect the driving coil and printed circuit board via a spiral spring. This has the effect of omitting cumbersome work such as soldering.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a swing actuator equipped with a power feeding mechanism according to the present invention. Figure 2 is a perspective view of power supply F, P, and C formed in the shape of a spiral spring, Figure 3 (A) is a plan view of power supply F, P, and C in Figure 2, and (B) is a cross-sectional view. , FIG. 4 is a side view of a conventional actuator. 4...Shaft, 6...Driving coil 18.
...Bobbin, 10...Arm, 12...Hend, 1
4...F, P, C, te...connector for power supply, 18
...Connector, 20...Printed circuit board, 22...
Stopper, 24...Striped copper foil, 26...Plastic film Patent applicant Copal Electronics Co., Ltd. Agent Patent attorney Sakae Kobayashi No. I Figure 2 Figure 24 Steel vines in thousands 3 Figure 4 Figure

Claims (1)

[Claims] 1. In a swinging actuator that swings a driven body, a flexible power feeding member formed in the shape of a spiral spring. Print. A circuit (F.P.C.) is wound around the shaft, and this flexible... Print. A power supply mechanism that connects a printed circuit board and a bobbin via a circuit. 2. The power feeding mechanism according to claim 1, wherein a stopper for regulating the swinging of the swinging actuator is arranged at a predetermined distance from the arm of the swinging actuator. 3. A flexible power supply made by covering a strip of copper foil with a plastic film. Print. A power feeding mechanism according to claim 1, which has a circuit. 4. Flexible. Print. The power feeding mechanism according to claim 1, wherein the printed circuit board and the bobbin are connected by connectors provided at both ends of the circuit.