JPS62232783A - Disk device - Google Patents

Abstract

PURPOSE:To reduce dispersion factors and to make a device large volume by limitting the movable range of a movable body by providing a supporting body and the buffer body having an abutting face at both sides, pinching the supporting body supported on a box body and the movable body coming into contact therewith. CONSTITUTION:A buffer body 4 having abutting faces at both sides pinches a supporting body 5, which is fixed to a box body 1 by a screw 11. The movable body 3 moving around the shaft 10 fixed to the box body 1 has two abutting parts and the buffer body 4 is arranged in this range to limit the movable range of the movable body 3. In case of the gap on two abutting faces of the movable body 3 being taken as F, the dispersion as -DELTAF, the thickness of the buffer body 4 pinching the supporting body 5 as G and the dispersion as DELTAG, the movable range of the moving body 3 becomes H=F-(G+DELTAG+DELTAF), the dispersion factors are remarkably reduced and the movable zone spreads. The dispersion quantity as a whole can be reduced very smaller because of there being only one buffer body having a big dispersion.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a movable range limiting mechanism for a movable body of a disk device.

[Conventional technology]

FIG. 2 is a plan view showing an example of a conventional disk device. A disk 2 is fixed to a disk drive motor 6 and rotates, and a head 7 for recording and reproducing is fixed to a movable body 3 and rotates and reciprocates about a shaft 10 in the direction of an arcuate arrow 20 in the figure. Further, the coil section 9 is released from the movable body drive motor flR air circuit section 8 and coil section 9, and the coil section 9 is fixed to the movable body 3 and is driven in the direction of the circular arc arrow 21 in the figure to access the head 7f.

The 29 surfaces of the coil portion 9 fixed to the movable body 3 come into contact with separate buffer bodies 12 and 15, so that the range of movement of the head 7 relative to the disk 2 is limited. In particular, with magnetic disk drives, the head can only move within a certain range on the disk, and if the head exists outside this range, the head or disk may be damaged, or the recorded signal may be destroyed, causing the disk drive to move. This is a fatal flaw. Therefore, as mentioned above, a backing that limits the movable range of the head is required.

FIG. 3 is a diagram showing the recording area in the radial direction of the disk.

Is the horizontal axis the disk radius distance? show. The head on the disk can move from distance E1 to distance F1, and what is the movable range between this distance? AI is 0 Distance G1 and distance H within this range
First, a stopper must be placed to restrict the movement of the movable body.

In order to reduce the impact caused by this Stoach collision, a shock absorber is provided as described above. There is a clearance B1 and a distance H between distances E1 and 01, which are determined by variations in the mounting position of the shock absorber with a stopper and displacement due to impact of the shock absorber.
A clearance C1 is essential between 1 and Fl. Therefore, the area D1 that can be used for recording and playback is l)1 ==
AI -B1-('1) In a disk recording device, it is important to secure as wide an area as possible that can be used for recording and reproduction.

FIG. 4 is an explanatory diagram showing the contents of the movable range in a conventional disk device. Buffer bodies 12 are respectively fixed at two locations on the case 1 or the magnetic circuit section 8 fixed thereto.
The movable body 3 moves between 13. Housing 10 intervals? A variation is - ΔA1 The thickness of the buffer body 12 is B variation is ΔB1
What is the thickness of the buffer body 13? C variation ΔC1 buffer 12.1
3 and the thickness of the fixing means 22 and 23 of the housing 1? Assuming H and I, what are the dimensions of movable body 3? If the total D variation is △D, then the movable range of the movable body 6 is E = A-((B+C+D+H+I)+(
ΔA+ΔB+ΔC+ΔD)). Buffers 12 and 1
3 is often made of materials such as rubber. It is very difficult to achieve dimensional accuracy with rubber, and ΔB and ΔC become extremely large. Also, the fixing means 22 and 23 are often adhesives? I am using it.

Controlling the dimensions of adhesive materials is extremely difficult. These dispersion factors are a major factor in reducing the movable range E, and in order to absorb the dispersion, very strict adjustments have been made on each contact surface.

[Problem that the invention seeks to solve]

However, the above-mentioned conventional technology has the following problems: In recent years, the capacity of disk devices has rapidly increased, and as the track density has increased, the disks used have become high-performance and expensive. .

Therefore, 1) the number and width of variation of the above-mentioned variation factors are large, and in particular, the disk usage area is limited due to the two buffer bodies and their fixing means, which is a major obstacle to increasing the capacity of the disk device.

2) In order to secure the same capacity, it is necessary to increase the track density by the amount of disk usage area, and even if the density increases normally, the design 2 is close to the limit with a small safety factor. This has caused a significant decrease in data reliability in disk drives.

3)-! 1), 2)? To compensate, high-performance, expensive disks and heads had to be used, leading to a significant increase in costs.

4) High-precision buffer "f2" to reduce variation
Please note that if you use one, very strict positioning adjustments will be required in two locations.

5) Two buffer bodies were required, resulting in an increase in cost.

6) Most of the means for fixing the shock absorber are adhesives, which often have low mechanical reliability in the event of a collision, and accidents have occurred in which the shock absorber separates, especially when subjected to temperature cycles. Please be aware that this will greatly reduce the reliability of not only the disk drive but also the host system.

The present invention is intended to solve these problems, and its purpose is to reduce the number of component parts, reduce the variation factors, easily and accurately position the shock absorber, and improve the recording of the disk. region? The objective is to provide a highly reliable and inexpensive disk device by wide use and by strengthening the buffer support structure.

[Determined means to solve all problems]

The disk device of the present invention includes: (1) a housing, a support fixed to the housing, and the support? a piece of buffer with abutment surfaces on both sides of the scissors;
It is characterized in that it consists of the buffer body and a movable body that abuts at two places, and the entire range of motion of the movable body is limited.

(2) a movable body, a support fixed to the movable body, a single buffer sandwiching the support and having contact surfaces on both sides;
The present invention is characterized in that the movable range of the movable body is restricted from the buffer body and the casing that abuts at two places.

[Effect]

According to the above-described configuration of the present invention, since there is only one shock absorber, the number of component parts is small, and there are few variation factors, so that the shock absorber can be easily and precisely positioned.

〔Example〕

Examples of the present invention will be described in detail.

FIG. 5 is an explanatory diagram showing the principle of the disk device of the present invention. A buffer body 4 having contact surfaces on both sides holds the support body 4, and the housing 1 is attached to the governing body 4 by screws 11. It is fixed at The movable body 3, which is fixed to the housing 1 and moves around the t-axis 10, has two abutting portions, and a buffer body 4 is disposed within these contact areas to limit the movable range of the movable body 3.

FIG. 1 is a plan view showing an example of the disk device of the present invention. Two abutting parts on the movable body 3 driven by the magnetic circuit part 8 and the coil part 9 fixed to the movable body 3? Do you have this? 1t1 buffer bodies 4 arranged at positions sandwiching fl are fixed to the casing 1 by supports 5. Note that the other components and their functions are the same as those described above.

FIG. 6 is a diagram showing the structure of the buffer body and support body of the present invention. One buffer body 4 is fitted into both sides of a support body 5 having a hole metal, resulting in an integrated structure. Also, the buffer 4 and the support 5? You can also insert it.

l! FIG. 7 is an explanatory diagram showing the contents of the movable range of the disk device of the present invention. The movable body 3 has contact surfaces at two places, and the distance between them is F and the variation is fixed to the housing 1.The thickness of the buffer body 4 sandwiching the support body 5 is G and is fixed to the housing 1. ΔG
Then, the movable range H of the moving body 3 is H−F−(G+ΔG+
.DELTA.F), and compared to the conventional example mentioned above, the factors of variation in the variation are significantly reduced and the movable range E is widened. Since there is only one buffer body with large variations, the amount of variations as a whole is extremely small.

FIG. 8 is a plan view showing another example of the disk device of the present invention. The casing 1 has two abutting parts 24 and 25, and between these abutting parts 15 and 15 are fixed to the movable body 3 with screws 16. A single buffer body 14 is arranged to limit the entire rotation range of the movable body 5. The other components and their functions are the same as those described above.

Support 5? It is also very easy to construct the flexible body from an elastic body such as a leaf spring. In this case, the energy of the impact can also be absorbed by the support 5, causing displacement of the contact area due to the impact. It was possible to significantly reduce the amount of noise and was very effective in expanding the recording area.

〔Effect of the invention〕

As described above, according to the present invention, 1) It is a simple mechanism with few constituent factors, and there is only one buffer body, which is the main cause of variation, and the means for fixing the buffer body is not adhesive, so the number of variation factors is reduced. ◇This makes it possible to increase the capacity of the disk device to 7t.

2) Since the recording area can be expanded, a disk device with high track density and high data reliability can be realized.

3) Because of 2), inexpensive heads and disks can be used without compromising data reliability, contributing to cost reduction. 4) Variations are small, allowing the use of less precise buffers, making it possible to There is no need for positioning vI4 adjustment, and only one adjustment location is required. In addition, it became possible to perform adjustments without adjustment, contributing to cost reduction.

5) Since it functions with one buffer, the mechanism becomes simpler and costs are reduced.

6) In the event of a collision, the reliability of the host system has been improved compared to the Omanoko FL1C, which has realized a disk device that has a movement range limiting mechanism with high mechanical reliability and strong fixing strength against thermal cycles.

7) By configuring the buffer support with a leaf spring, the displacement due to impact can be reduced, and the recording area can be widely used effectively, so the effects of 2) and 3) are promoted.
Ta.

Contains the effect of

[Brief explanation of drawings]

FIG. 1 is a plan view showing an example of a disk device of the present invention. FIG. 2 is a plan view showing an example of a conventional disk device. FIG. 5 is a diagram showing the recording area in the radial direction of the disk. FIG. 4 is an explanatory diagram showing the contents of the movable range in a conventional disk device. FIG. 5 is an explanatory diagram showing the principle of the disk device of the present invention. FIG. 6 shows the structure of the buffer body and support body of the present invention. FIG. 7 is an explanatory diagram showing the contents of the movable range of the disk device of the present invention. FIG. 8 is a plan view showing another example of the disk device of the present invention. 1... Housing 2...-Disk 3... Movable body 4.12. i3,14・Φ・Buffer 5.15・Support 6・Fist・Disk drive motor 7・・Head 8・・Magnetic circuit section 911・・Coil section 10・・・Shaft 11.16・Screw 22, 23.Fixing means 24.25.Abutting part of the casing Applicant Seiko Epson Co., Ltd. Representative Patent Attorney Mogami °゛Kiri and 1 other person Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (2)

[Claims] (1) A movable body consisting of a casing, a support fixed to the casing, a buffer sandwiching the support and having contact surfaces on both sides, and a movable body that contacts the buffer at two places. A disk device characterized in that the movable range of the disk device is limited. (2) a movable body, a support body fixed to the movable body, a single buffer sandwiching the support body and having contact surfaces on both sides;
A disk device comprising the buffer body and a housing that abuts at two places, and limits the movable range of the movable body.