JPH02246065A - Magnetic head retracting device - Google Patents

Abstract

PURPOSE:To retract a magnetic head from a magnetic disk with miniaturized and simplified constitution by displacing the linear motion of an arm part by an energizing means such as a solenoid, etc., in a direction perpendicular to that of the motion. CONSTITUTION:A moving member 17 which moves the magnetic head 10 in the radius direction of the magnetic disk 11, the arm part 16 driven forward and backward in the longitudinal direction of an elongated hole 8 by the pressing means 15, and a guide member 17 which guides a second guide shaft 9 to guide the magnetic head 10 to a first position where it is abutted with the magnetic disk 11 or a second position where it is separated from the magnetic disk 11 reacting to the motion of the arm part 16 are provided. At such a case, the magnetic head 10 is displaced in a direction abutting with or separating from the magnetic disk 11 according to the movement of the arm part 16 by the energizing means 15 along the plane of the magnetic disk 11. In such a way, the retraction of the magnetic head 10 can be performed with miniaturized and simplified constitution.

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention relates to a magnetic head evacuation device, particularly for magnetically recording and reproducing still image information on a magnetic disk used in a magnetic recording and reproducing device such as an electronic camera. The present invention relates to a magnetic head evacuation device for evacuation of a magnetic head from a magnetic disk.

(b) Conventional technology Magnetic disks used in electronic still cameras, etc., are different from ordinary 70-speed disks; they record at a high density and rotate at high speed, so the contact between the head and the disk is also made using a pad on the side of the magnetic head. It is different from a normal floppy disk device, which has a floppy disk drive. That is, the fourth
As shown in the figure, in the case of an electronic still camera, etc., the magnetic sheet (4) housed in the jacket (3) is held in between, and the magnetic head is moved in the radial direction of the magnetic disk to the opposite side of the magnetic head (5). a regulating plate (1) held by a regulating plate holder (2) is arranged,
By arranging the regulating plate (1) at a predetermined position facing the magnetic head (5), the magnetic sheet (4) is brought into contact with the magnetic head (5) to achieve good contact.

However, in the head contact mechanism as described above, the magnetic head (5) is usually arranged so as to slightly protrude from the recording surface of the magnetic sheet (4).
) is left protruding from the magnetic sheet (4) for a long time, impressions will be formed on the magnetic sheet (4), causing dropouts and the like.

Therefore, conventionally, as described in Japanese Patent Application Laid-open No. 63-266677 (G11B21/12), when magnetic recording etc. are completed, the magnetic head is immediately evacuated from the recording/reproducing area of the magnetic sheet, and the dropout However, in this case, when performing magnetic recording or reproduction again, it takes time to scan the track on the magnetic sheet to be magnetically recorded or reproduced and move the magnetic head to that position. A problem arises in that magnetic recording or reproduction cannot be performed immediately.

On the other hand, there is a device that avoids leaving impressions by the magnetic head on the magnetic sheet by retracting the regulating plate that contacts the magnetic sheet without moving the magnetic head.
This is proposed in Japanese Patent No. 243174 (611B21102), but in this case it is difficult to control the mechanism because it transmits the rotational force of the motor to the rotating shaft.

(c) Problems to be Solved by the Invention The present invention has been made in view of the above points, and provides a magnetic head evacuation device that is small and simple in structure and capable of evacuation of a magnetic head from a magnetic disk. This is what we are trying to propose.

(d) Means for solving the problems In order to solve the above problems, the magnetic head evacuation device of the present invention has the following features:
A first guide shaft is passed through a through hole provided on one end side, and a second guide shaft is passed through a long hole provided on the other end side, so that the magnetic head provided is opposed to the magnetic head. a moving member disposed to move the magnetic disk in the radial direction; one end side is coupled to the second guide shaft, the other end is pivotally supported by the base body, and the moving member is moved in the longitudinal direction of the elongated hole by a biasing means. a bowl portion that is driven forward and backward; and a second guide shaft for displacing the magnetic head to a first position in contact with a magnetic disk or a second position away from the magnetic disk in response to movement of the bowl portion. The configuration includes a guide member that guides the.

(e) Effect According to the above configuration, as the bowl portion moves substantially along the magnetic disk surface by the biasing means, the magnetic head is displaced in the direction of coming into contact with or separating from the magnetic disk.

(F) Example A magnetic head retracting device of the present invention will be described below with reference to the drawings.

FIG. 1 shows a perspective view of the magnetic head evacuation device of the present invention. To describe the basic structure, this evacuation device has a first guide shaft (7) in a through hole (6) provided at one end. is penetrated, and a second guide shaft (9) is passed through the elongated hole (8) provided on the other end side, and the magnetic head (10) disposed on the upper surface is opposed to the magnetic head (10). One end is connected to a carriage (12) arranged to move the magnetic disk (11) in the radial direction and a second guide shaft (9), and the other end is connected to a solenoid holder (
13) by the solenoid rotation center pin (14), and the long hole (8) is supported by the solenoid (15).
) The shaft holding arm (1) is driven forward and backward in the longitudinal direction.
6) and to displace the magnetic head (10) to a first position in contact with the magnetic disk (11) or a second position away from the magnetic disk (11) in response to the movement of the arm (16). The shaft positioning block (17) guides the second guide shaft (9). More specifically, the head carriage (12) accesses the magnetic sheet in the radial direction (direction of arrow Y) using the first guide shaft (7) as a basic sliding axis to record and reproduce signals. The second guide shaft (9) is driven by a shaft biasing spring (18) whose one end is engaged with the bottom surface of the carriage (12) and whose other end is engaged with the second guide shaft (9). It is always in contact with the lower surface of the elongated hole (8) of the forked part. Further, the second guide shaft (9) is held by the shaft holding arm (16), and the solenoid (
The shaft holding arm (15) is configured to move in conjunction with the movement of the shaft holding arm (15) by turning ON/OFF the voltage applied to the solenoid.
The shaft holding arm (16) is held by a coil spring (not shown) wound around the solenoid iron core (19) of 6).
is designed to slide in the direction of arrow A. Further, the second guide shaft (9) has a shaft holding arm (
16) is always biased in the direction of arrow C, and its position is regulated by contacting a shaft positioning block (17) extending from the chassis. The solenoid (15) is held by a solenoid holder (13), and rotates around the solenoid rotation center pin (14).
5) is configured to be movable in the direction of arrow B, and the movement of the solenoid (15) is restricted by a slide groove (22) provided in a bottle (21) projected by the solenoid (15) and a solenoid holder (13). It is carried out. With the configuration described above, the present invention realizes retraction of the head.

Next, the head retraction W&groove of the present invention will be explained in order with reference to FIGS. 2 and 3. In addition, FIG. 2 is a diagram showing an outline of a signal recording/reproducing state, and FIG. 3 is a diagram showing an outline of a signal non-recording/reproducing state, and the same parts as in FIG. 4 are given the same reference numerals and explained. is omitted.

Figure 2 shows the voltage application state of the solenoid (15), that is, the solenoid ON state, and at this time the second guide shaft (
9) is fixed in position by the L-shaped portion (23) of the shaft positioning block (17), and the head (10) is set to the position set to the optimum head protrusion amount. When the voltage applied to the solenoid is turned off, the coil spring (
shaft holding arm (16),
The guide shaft (9) moves in the direction of arrow a. The shaft holding arm (16) and the guide shaft (9) are connected to each other by the coil spring (20).
9) is the slope (24) of the shaft positioning block (17).
) in the direction of arrow C until it comes into contact with. Due to the above operation, the shaft biasing spring (20) always causes the guide shaft 7 to
) (9) with the lower surface of the elongated hole (8) in contact with the head carriage (12) also rotates in the direction of arrow d in conjunction with the movement of the guide shaft (9) with the guide shaft (7) as the center of rotation. As shown in FIG. 3, the head (10) is retracted from the magnetic disk (4). Also, solenoid (1
5) also moves in the direction indicated by the arrow in conjunction with the movement of the guide shaft (9), with the solenoid rotation center pin (14) as the rotation center.

(G) Effects of the Invention As described above, according to the present invention, the head can be displaced in a direction perpendicular to the linear movement of the arm by the biasing means such as a solenoid, so it is compact and compact. A magnetic head evacuation device capable of evacuation of a magnetic head from a magnetic disk with a simple configuration can be provided.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the magnetic head retracting device of the present invention, FIGS. 2 and 3 are diagrams for explaining its operation, and FIG. 4 is a sectional view showing the positional relationship between the magnetic head and the regulating plate. be. (6)...Through hole, (7)...First guide shaft, (8)...Long hole, (9)...Second guide shaft, (10)...Magnetic head , (11)...Magnetic disk, (12)...Carriage, (13)...Solenoid holder, (15)...Solenoid, (16)
... Arm part, (17) ... Shaft positioning block.

Claims (1)

[Claims] (1) A first guide shaft is passed through a through hole provided at one end, and a second guide shaft is passed through a long hole provided at the other end, and the magnetic head is a moving member arranged to move in the radial direction of the magnetic disk facing the head; one end side coupled to the second guide shaft, the other end pivotally supported by the base body, and the elongated hole is moved by a biasing means. an arm that is driven forward and backward in the longitudinal direction; and a second arm that displaces the magnetic head to a first position in contact with a magnetic disk or a second position away from the magnetic disk in response to movement of the arm. A magnetic head retracting device comprising: a guide member for guiding a guide shaft of the magnetic head;