JPS63249979A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve the positioning precision of a head and reduce the load for movement of a carriage by elastically constituting a conductive member which connects the head to the signal processing circuit of a recording and reproducing device and energizing the carriage in one direction by this conductive member. CONSTITUTION:Two conductive springs 17 and 17 consisting of a metallic thin plate which has a high conductivity and is superior in elasticity are insert- molded in a head holding part 3b, and the other ends are fixed to a printed board 16, which is fixed to a body frame of a magnetic disk device, by solder ing. Conductive springs 17 and 17 are bent in the direction of an arrow A from original positions in the movement area of a carriage 3, and the carriage 3 is energized in the direction of an arrow B by the elastic force of conductive springs 17 and 17 repelling this bend. Thus, backlash is eliminated as the energiz ing force of the carriage 3 and such proper energizing force is obtained that the load for movement of the carriage is not increased very much.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a recording/reproducing device, and more specifically, a recording or reproducing head is mounted on a disk as a rotating recording medium,
The present invention relates to a recording/reproducing apparatus that records or reproduces information by moving a head carriage biased in one direction.

[Prior Art] FIG. 2 schematically explains the conventional structure of a small magnetic disk device used in an electronic still camera that records a still 1F image as this type of device.

In FIG. 2, reference numeral 1 indicates a magnetic disk.

It is rotated by a spindle motor 18 at a predetermined speed.

Reference numeral 2 denotes a magnetic head, which is mounted on a head carriage (hereinafter abbreviated as carriage) 3 that transports the magnetic head. As shown in an enlarged view in FIG. 3, the magnetic head 2 is constructed by joining a head chip 11 with a coil 12 wound thereon to a head base 14 together with a relay board 13. The head base 14 is fixed to 3b and mounted on the carriage 3.

Note that both ends of the coil 12 are soldered to the conductive patterns 13a, 13a of the relay board 13J. Conductive pattern 1
A lead wire 15 of a conductive member is soldered to 3a, 13a, and the magnetic head 2 receives a signal through the lead wire 15 for processing a recording or reproduction signal configured on a printed circuit board indicated by reference numeral 16 in FIG. connected to the processing circuit.

On the other hand, the carriage 3 is provided so as to be slidable on the guide shaft 4.5 in the directions of arrows A and B along these. A rack portion 3a is integrally provided on one side of the carriage 3, and this rack portion 3a is meshed with a binion gear 7 connected to an output rotating shaft of a stepping motor 6 that drives the carriage 3.

When recording or reproducing based on such a structure, the stepping motor 6 is rotationally driven to drive the carriage 3 in directions A and B via the pinion gear 7 and the rack section 3a, and the magnetic head 2 is moved to the magnetic disk l. is moved in the radial direction of the magnetic disk 1 and positioned on the target track of the magnetic disk 1. A video signal is then recorded or reproduced on that track.

In the above-described structure, the carriage 3 is moved by the spring 10 in a direction A that is approximately parallel to the A direction of one of the moving directions of the carriage 3.
It is designed to be constantly biased in the ' direction.

This is because such biasing eliminates play in the engagement between the rack portion 3a and the pinion gear 7, so-called backlash, thereby eliminating errors during head positioning and improving positioning accuracy.

[Problems to be Solved by the Invention] Recently, the above-mentioned magnetic disk devices for electronic still cameras have come to the stage of practical use, such as those that use approximately 2-inch magnetic disks and perform recording and playback on 50 tracks. It is becoming increasingly popular, and significant miniaturization is progressing.
However, as the magnetic disk drive becomes smaller in size, the driving force of the carriage 3 is limited due to its limitations and the limitations of the power source that can be used in the camera, and the biasing force of the spring 10 must be reduced accordingly. Furthermore, as the device becomes smaller, it becomes difficult to secure a space to allow the lead wire 15 to have sufficient play.

As a result, the rigidity of the lead wire 15 may adversely affect the movement of the carriage. That is, if the force due to the rigidity of the lead wire 15 acts in a direction that cancels out the biasing force of the spring 10, the above-mentioned backlash cannot be eliminated and the head positioning accuracy deteriorates. Furthermore, if the force due to the rigidity of the lead wire 15 acts in the same direction as the biasing force of the spring 10, the load for moving the carriage 3 will increase.

Means for Solving Problem E] In order to solve these problems, according to the present invention, a recording or reproducing head is mounted on a disk as a rotating recording medium, and is elastically biased in one direction. In a recording and reproducing apparatus that records or reproduces information by moving a head carriage that has been moved, a conductive member for connecting the head to a signal processing circuit of the recording and reproducing apparatus is configured to be elastic, and the conductive member moves the head carriage of the carriage. We adopted a structure that biases in one direction.

[Function] According to such a structure, the conductive member is configured as a simple conductive member as in the past, and the biasing by the elastic member is more effective than when an elastic member is separately provided for biasing the carriage. The negative influence of the conductive member on the conductive member can be avoided, and an appropriate biasing force can be obtained. It is also possible to reduce the number of parts.

[Example] Hereinafter, details of embodiments of the present invention will be described.

FIG. 1 shows the structure around the carriage of a magnetic disk device for an electronic still camera according to an embodiment of the present invention. In this figure, the same reference numerals are given to parts that are common or corresponding to those of the conventional example shown in FIGS. 2 and 3. Hereinafter, the explanation of the common parts of this embodiment with the conventional example will be omitted, and the points different from the conventional example will be explained.

As shown in FIG. 1, this embodiment differs from the conventional example in that the magnetic head 2 is constructed as a single head chip 11 around which a coil 12 is wound, and a head holder is provided integrally with the carriage 3. The head chip 11 is directly fixed to the portion 3b by adhesive or the like.

The head holding portion 3b is provided with two conductive springs 17 and 17 made of thin metal plates with good conductivity and high elasticity.
is insert molded. Each of the ends of the conductive springs 17.17 on the magnetic head 2 side is bent into an L-shape and is exposed on the outer surface of the head holding part 3b, and the coil 12 of the magnetic head 2 is connected to each end of the conductive spring 17.17. Both ends are connected by soldering. Also conductive spring 17.1
The other end of each of 7 is similarly bent into an L shape, and is fixed by soldering to a printed circuit board 16 fixed to a main body frame (not shown) of the magnetic disk device, and is configured on the printed circuit board 16. It is connected to a signal processing circuit (not shown) that processes recorded and reproduced signals.

The structure of the device of this embodiment other than the above-mentioned portions is the same as that of the prior art example described above.

When recording or reproducing based on such a structure, the stepping motor 6 is rotationally driven in the directions of arrows a and b, as in the conventional example, so that the carriage 3 is moved between A and B via the pinion gear 7 and the rack section 3a. The magnetic head 2 is moved in the radial direction of the magnetic disk 1 and positioned on a target track of the magnetic disk 1. A video signal is then recorded or reproduced on that track.

Here, signals are exchanged between the magnetic head 2 and the signal processing circuit on the printed circuit board 16 via conductive springs 17 and 17. In addition, the conductive spring 17.17 is connected to the carriage 3.
It is assumed that the carriage 3 is deflected in the direction A from its original shape in the movement region of the carriage 3, and the carriage 3 is urged in the direction B by the elastic force of the conductive springs 17 and 17 that repel this deflection.

This brings the rack portion 3a and pinion gear 7 into close contact, eliminates backlash between them, and positions the magnetic head accurately.

According to this embodiment, since the carriage 3 is biased by the conductive springs 17 and 17, which are conductive members that connect the magnetic head 2 to the signal processing circuit, the lead wires used in the conventional example when biasing the carriage 3 are used. 15 can be avoided. In addition, backlash can be eliminated as a biasing force for the carriage 3, and an appropriate biasing force that does not increase the load of movement of the carriage 3 can be obtained. Further, according to this embodiment, by employing a conductive spring in which a conductive member and a biasing member are integrated, the number of parts can be reduced and costs can be reduced.

The same effect can be obtained by using a flexible printed board with appropriate elasticity instead of the conductive springs 17 and 17 to connect the magnetic head 2 and the signal processing circuit and to bias the carriage 3. .

Further, in this embodiment, the carriage 3 moves in a straight line, but the structure according to the present invention described above can also be applied to a magnetic disk device in which the carriage 3 is an arm type and moves in an arc. Furthermore, it goes without saying that the structure according to the present invention is applicable not only to magnetic disk devices but also to other disk devices such as optical disk devices.

[Effects of the Invention] As is clear from the above description, according to the present invention, a recording or reproducing head is mounted on a disc as a rotating recording medium, and a head carriage is elastically biased in one direction. In a recording and reproducing apparatus that records or reproduces information by moving the head, a conductive member for connecting the head to a signal processing circuit of the recording and reproducing apparatus is configured to be elastic, and the conductive member moves the carriage in one direction. Since a biasing structure is adopted, excellent effects such as improved head positioning accuracy, reduced carriage movement load, and cost reduction by reducing the number of parts can be achieved.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the structure around the helad carriage of a magnetic disk device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of the structure of a conventional magnetic disk device, and FIG. 3 is a view around the magnetic head of the same device. FIG. 1...Magnetic disk 2...Magnetic head 3.
...Head carriage 4.5...Guide shaft 6...
・Stepping motor 7...Pinion gear 16...
・Printed circuit board 17...conductive spring 8f> (1
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Claims (1)

[Claims] In a recording/reproducing apparatus that records or reproduces information by moving a head carriage elastically biased in one direction, a recording or reproducing head is mounted on a disk as a rotating recording medium. A recording/reproducing apparatus characterized in that a conductive member for connection to a signal processing circuit is configured to be elastic, and the conductive member biases the carriage in one direction.