JPH0246581A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To contrive the mass production and high reliability of the subject device by making its construction capable of adjusting a head position by turning a slide shaft. CONSTITUTION:An eccentric bush 5 as a means of constituting its eccentric axial center against the slide shaft 3 possesses the axial center which is different from a shaft center of the slider shaft 3, and is fixed to approximately the middle of the slide shaft 3 and then held on a receiving part 4c provided on a frame 4. Then, receiving surfaces of receiving parts 4a and 4b are arranged to be approximately vertical to a bottom surface of the frame 4, a receiving surface of the receiving part 4c being intersected with the receiving surfaces of the receiving parts 4a and 4b at approximately right angles respectively, whereas the slide shaft 3 is mounted in order to come into contact with the receiving parts 4a and 4b, while the eccentric bush 5 to come into contact with the receiving part 4c. In this case, the head 1 can freely be adjusted in height in accordance with an eccentric amt. of the eccentric axial center by turning the slide shaft 3. That is, by making the construction capable of adjusting the height of the head, the relevant essential dimensional accuracy and assembly accuracy can be made to a drastic tolerance, thus obtaining the mass-productive and high reliable device accordingly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording device that uses a magnetic disk as a recording medium, and more particularly to a slide shaft fixing structure for guiding a carriage.

[Conventional technology]

FIG. 6 shows a side sectional view of a main part of a conventional recording/reproducing device.

In FIG. 6, a carriage 22 carries a head 21 and is held by a slide shaft 23 so as to be slidable in the radial direction of a magnetic disk 25, and the slide shaft 23 is fixed to a frame 24.

The carriage 22 carries a spring 28 and an upper carriage 29 to press the magnetic disk 25 against the head 21, and the magnetic disk 25 rotates together with a hub 27 provided on a spindle motor 26.

The relative position of the head 21 in the perpendicular direction to the surface of the magnetic disk 25 (hereinafter referred to as head height) is
Fixed part position of slide shaft 23 of 4, spindle motor 2
6 is installed at the position of the section, the position of the hub 27, and the carriage 2.
The structure is determined by the dimensional accuracy and assembly accuracy of the individual components, such as the position of the head 21 from the held part by the slide shaft 23 of 2 and the position of the head 21 mounted on the carriage 22, and the assembly accuracy. The performance of the magnetic recording device was guaranteed by setting it at the required position.

[Problem to be solved by the invention]

However, in the above-mentioned conventional technology, the head height, which is important for the performance of the magnetic recording device, is determined by the χJ accuracy and assembly accuracy of the above-mentioned components, so these must be manufactured with extremely high precision. This has the problem of extremely high costs.

Furthermore, unless the variation in judicial accuracy of the constituent elements is reduced to zero or the related elements are selected and combined, the head height will inevitably vary from the target value.

Therefore, the present invention solves these conventional problems.
The purpose of this is to provide a highly reliable recording and reproducing device that can be mass-produced and has a structure that allows the height of the head to be adjusted, thereby greatly increasing the dimensional accuracy and assembly accuracy of related elements. be.

[Means to solve the problem]

The recording and reproducing apparatus of the present invention includes a carriage that mounts a head for recording and reproducing information on a disk, and that has sliding guide sections at at least two places, and that engages with the sliding guide sections to freely slide the carriage. It consists of a slide shaft with a circular cross-sectional shape and a frame that supports the slide shaft. The frame is provided with a means for configuring the eccentric axis and a means for adjusting rotation at at least one end, and the frame has a receiving surface that receives and supports the means for configuring the eccentric axis and the outer periphery of the slide shaft, respectively, at approximately right angles. The slide shafts are arranged so as to cross each other to support the slide shafts, and the position of the head can be adjusted by rotating the slide shafts.

[For production]

According to the recording and reproducing apparatus configured as described above, a means for configuring an axial center eccentric from the axial center of the slide shaft is provided approximately at the center of the slide shaft, and a means for configuring an axial center eccentric from the axial center of the slide shaft is provided in the frame. The bearing surfaces that support the outer periphery of the slide shaft are arranged to intersect at approximately right angles to support the slide shaft, and the head height is adjusted according to the amount of eccentricity of the shaft center that is eccentric due to rotation of the slide shaft. It can be adjusted freely, and by providing a means for configuring an axis that is eccentric to the axis of the slide shaft approximately in the center of the slide shaft, the length of the slide shaft can be shortened, resulting in a space-saving configuration. Can be done.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

FIG. 1 is a plan view of the recording and reproducing apparatus of the present invention, FIG.
The figure is a front view of the main parts around the slide shaft of the present invention.

In FIG. 1, a drive motor 9 that rotationally drives a magnetic disk 7 is fixed to a frame 4. As shown in FIG.

The carriage 2 on which the heads 1-' and ' for recording and reproducing signals are mounted is provided with burrings 2a and 2b as sliding guide parts, and the approximately center of the burrings 2a and 2b is supported by a frame 4. The slide shaft 3 is engaged with the slide shaft 3, and is slidable in the axial direction of the slide shaft 3.

The carriage 2 receives the driving force of a step motor 8 fixed to the frame 4, moves in the radial direction of the magnetic disk 7, and can stop at any position depending on the articulation of the step motor 8. The eccentric bushing 5, which serves as a means for constructing a shaft center eccentric to the slide shaft, is attached to the slide shaft 3.
The slide shaft 3 has a different shaft center from that of the slide shaft 3, and is fixed approximately at the center of the slide shaft 3 and held on a receiving portion 4c provided in the frame 4. The frame 4 also includes a receiving portion 4a for the slide shaft 3,
4b, and the slide shafts 3 are held down by respective elastic presser plates 6. Note that at least one end surface of the slide shaft 3 is provided with a groove 3a.

Next, the fixing structure of the slide shaft 3 will be explained in detail.

As shown in FIGS. 2 and 3, the receiving surface of the receiving portion 4a%4b is approximately perpendicular to the bottom surface of the frame 4, and the receiving surface of the receiving portion 4C is parallel to the receiving surface of the receiving portion 4a%4b. They are arranged so as to intersect each other at approximately right angles. The slide shaft 3 has a receiving part 4a s4b
The eccentric bushing 5 is mounted so as to be in contact with the receiving portion 4c, and is held in a compressed manner in the direction of the arrow F in the figure by an elastic presser plate 6 fixed to the frame 4 with screws or the like. There is.

In the above configuration, when the slide shaft 3 is rotated by engaging, for example, a driver in the groove 3a, the slide shaft 3 and the eccentric bushing 5 are eccentric, and the slide shaft 3
Since it is guided by the receiving surfaces of the a s 4 b, the slide shaft 3 can be moved in parallel along the receiving surfaces of the receiving parts 4a-, 4b, and the eccentric bushing 5 can be moved in parallel along the receiving surfaces of the receiving parts 4C. It has a unique structure.

FIG. 2 shows the slide shaft 3 at its lowest position with respect to the frame 4, that is, when the head height is at its lowest;
The figure shows the slide shaft 3 at its highest position relative to the frame 4, that is, when the head height is at its highest.

In the configuration of this embodiment, the height variable range of the slide shaft 3 relative to the head 1 is determined by the outer diameter of the slide shaft 3, the outer diameter of the eccentric bushing 5, and the amount of eccentricity between the slide shaft 3 and the eccentric bush 5. can be set freely, absorbing all component dimensional accuracy and assembly accuracy that are involved in head height,
The uJ function is to adjust the head height to the target value.

Next, another embodiment of the present invention will be described based on FIGS. 4 and 5.

FIGS. 4 and 5 are front views of main parts around the slide shaft showing other embodiments of the present invention.

In this example, the slide shaft 10 is provided with an eccentric portion 10a formed by cutting or the like as a means for forming an axial center that is eccentric from the axial center of the slide shaft 10 at a substantially medium temperature of the slide shaft 10. For other parts, see Figures 2 and 3.
The structure is the same as that described above in the figure, and a description thereof will be omitted.

With the above structure, this embodiment operates in the same way as the previous embodiment. 4 shows the slide shaft 10 at the lowest position with respect to the frame 4, that is, the head height is the lowest, and FIG. 5 shows the slide shaft 10 in the highest position with respect to the frame 4, that is, the head height This is when it is at its highest.

In the conventional slide shaft fixing structure, both ends of the slide shaft are fixed to the frame, but in the recording/reproducing device of the present invention, both ends of the slide shaft are not fixed, and the center part, which is not used during sliding, is fixed to the frame. In order to press and hold the parts, the length conventionally required to fix the slide shaft can be shortened, and space can be saved.

〔Effect of the invention〕

As described above, according to the present invention, means for configuring an axis eccentric from the axis of the slide shaft is provided approximately at the center of the slide shaft, and means for configuring an eccentric axis from the axis of the slide shaft is provided in the frame. The bearing surfaces that support the outer periphery of the slide shaft are arranged to intersect each other at approximately right angles to support the slide shaft, and the slide shaft can be rotated to adjust the position of the head while maintaining a simple structure. Since it is possible to adjust
It is possible to provide a highly reliable recording and reproducing device that can be mass-produced and allows the optimum value of the head position to be created while greatly allowing for the dimensional accuracy and assembly accuracy related to the components involved in the position of the head.

In addition, by providing a means for configuring an axis that is eccentric from the axis of the slide shaft approximately at the center of the slide axis, the slide axis can be shortened, so that a recording/reproducing device with a short depth can be provided. The effects of the invention are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the recording/reproducing apparatus of the present invention. FIGS. 2 and 3 are front views of essential parts around the slide axis of an embodiment of the present invention. FIGS. 4 and 5 are front views showing other embodiments of the present invention. FIG. 6 is a side sectional view of a main part of a conventional recording/reproducing apparatus. 1st 81111II 10a...Eccentric part

Claims (1)

[Scope of Claims] 1) A carriage mounting a head for recording and reproducing information on a disk and having sliding guide portions at at least two locations, and engaging the sliding guide portions to allow the carriage to slide freely. It consists of a slide shaft with a circular cross-sectional shape and a frame that supports the slide shaft. The frame is provided with a means for configuring the eccentric axis and a means for adjusting rotation at at least one end, and the frame has a receiving surface that receives and supports the means for configuring the eccentric axis and the outer periphery of the slide shaft, respectively, at approximately right angles. A recording/reproducing device characterized in that the recording/reproducing device is configured to have a structure in which the slide shafts are supported by being arranged so as to intersect with each other, and the position of the head can be adjusted by rotating the slide shafts. 2) The recording/reproducing device according to item 1, wherein the means for forming the eccentric axis is configured by fixing an eccentric bush having an axis different from the axis of the slide shaft. 3) The recording/reproducing apparatus according to item 1, wherein as means for forming the eccentric axis, an eccentric portion having a different axis is formed in a part of the slide shaft.