JPH0643858U - Impact resistant structure of disk device - Google Patents

Abstract

(57) [Summary] [Purpose] When the disk device receives an impact, it regulates the collision of the upper and lower heads and prevents the head from being damaged. [Structure] A contact portion is provided in the upper carriage arm portion other than the holder support portion so that the contact portion abuts on the holder before the upper and lower heads collide upon impact.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an impact resistant structure of a disk device, and more particularly to an upper carriage structure in which an arm for supporting an upper carriage is provided with an impact resistant contact portion for preventing a collision of a pair of heads.

[0002]

[Prior art]

 4 and 5 are cross-sectional views of the carriage portion of the conventional disk device. FIG. 4 shows a state in which a magnetic disk is not attached to the disk device, and FIG. 5 shows a state when a shock is applied to the disk device shown in FIG.

In FIG. 4, a lower carriage 15 that carries a lower head 13b that holds the magnetic disk 9 and moves to carry out recording / reproducing is configured by a leaf spring for the upper carriage 11 that carries the upper head 13a. It is fixedly supported by a fixing screw 17 via a suspension 16 that is provided. An arm 12 provided on the upper carriage 11 is supported by a holder 14 supported by a frame (not shown). When the magnetic disk 9 is inserted into the disk device for recording and reproducing, the holder 14 moves downward in the figure, and at the same time, the upper carriage 11 causes the upper head 13a and the lower head 13b to move the magnetic disk with proper surface pressure by the spring 18. Rotate to the pinching position. At this time, the arm portion 12 and the holder 14 interfere with each other to prevent frictional resistance when the entire carriage moves to a desired track position, or when recording and reproducing are performed while the disk device receives a slight vibration, and the upper carriage 12 A structure is provided in which a certain gap is secured between the arm 12 and the holder 14 so as to prevent the recording pressure from being affected by the surface pressure that holds the magnetic disk between the lower carriage 11 and the lower carriage 15. . Recording and reproduction were performed on a magnetic disk based on the carriage structure described above.

[0004]

[Problems to be solved by the device]

 The above-mentioned disk device has no problem in simply performing recording and reproduction. However, the following drawbacks have become apparent from recent technological trends. 2. Description of the Related Art Recently, in the field of portable personal computers, miniaturization, thinning, and weight reduction such as laptop type, book type, and notebook type are rapidly progressing. As it becomes smaller, thinner, and lighter, it is being carried more and more frequently. For this reason, the probability of being impacted by a drop or the like increases, and it is strongly desired to improve the impact resistance of the disk device incorporated in a portable personal computer.

In the prior art, a case where the entire disk device falls in the direction of the arrow in FIG. 5 and receives a shock will be described. The upper carriage 11 rotates about the arm 12 as a fulcrum, and the upper head 13a and the lower head 13a. 13b collides. When the impact is large, the upper head 13a or the lower head 13b is likely to be damaged. As a matter of course, not only recording cannot be reproduced, but also the existing data may be destroyed by the damaged head piece. Especially in a thin disk device, the gap between the upper head 13a and the lower head 13b is inevitably reduced initially, and there is a high possibility that the upper head 13a and the lower head 13b collide and are damaged when a shock is applied. . Therefore, the present invention solves the above problems, and its purpose is to provide a disk device having a simple structure and excellent impact resistance.

[0006]

[Means for Solving the Problems]

 A disk device of the present invention holds a head pair for sandwiching a magnetic disk and recording / reproducing information, and includes a first carriage and a second carriage supported by the first carriage. A carriage pair that can be moved to a desired track of the second carriage, and a holder that accommodates the magnetic disk and supports the arm portion of the second carriage when the magnetic disk is not mounted. It is characterized in that a contact portion for impact resistance is provided in addition to the support portion inside.

[0007]

[Action]

 According to the above configuration of the present invention, the arm portion of the upper carriage is extended to the front of the carriage, and a shock-resistant contact portion is provided on the arm portion in addition to the support portion supported by the holder. When an impact is applied to the entire disk device in the mounted state and the upper carriage attempts to bend downward, the impact-resistant abutting part on the arm of the upper carriage collides with the upper and lower heads. Before doing so, contact the holder to prevent collision or damage to the upper head or lower head.

Further, the impact resistant contact portion provided on the arm portion of the upper carriage is at the same height as or at a position higher than the support portion of the holder also provided on the arm portion in the magnetic disk mounted state. Since it is provided, it is possible to perform recording and reproduction as usual without interfering with the holder when the magnetic disk is mounted.

[0009]

【Example】

 1, 2 and 3 show a suitable embodiment of the disk device of the present invention. FIG. 1 is a schematic side view showing a state in which a magnetic disk is not mounted in a disk device according to the present invention. FIG. 2 is a schematic side view showing a magnetic disk mounted state of the disk device according to the present invention. FIG. 3 is a schematic side view showing a state when a shock is applied to the disk device according to the present invention shown in FIG. In this embodiment, a 3.5-inch floppy disk drive will be described as an example for convenience of explanation. First, the structure of a disk device according to the present invention will be described with reference to FIGS. The upper head 3a and the lower head 3b are mounted on the upper carriage 1 and the lower carriage 5, respectively. The upper carriage 1 is formed integrally with a suspension 6 composed of a leaf spring, and the suspension 6 is fixed by a fixing screw 7. The structure is fixed to the lower carriage 5. Since it is fixed to the lower carriage 5 by using the suspension 6 composed of a leaf spring, it is possible to rotate the magnetic disk 9 downward when the magnetic disk 9 is mounted and upward when the magnetic disk 9 is not mounted. In this structure, the positional accuracy of the upper head 3a with respect to the lower head 3b, which is extremely important in terms of the above, does not vary. Further, when the magnetic disk 9 is mounted on the upper carriage 1, the upper head 3a or the lower head 3b needs to hold the magnetic disk 9 with a constant and appropriate surface pressure. It is pressed downward by the surface pressure. A 3.5-inch standard magnetic disk is usually housed in a disk cartridge, and when it is inserted into a disk device, the shutter provided in the cartridge opens and the magnetic disk is exposed to enable recording and reproduction. Since it is irrelevant in the explanation of the device, the explanation will be continued without the disc cartridge. On the other hand, the lower carriage 5 supporting the upper carriage 1 and carrying the lower head 3b is connected to a carriage seek mechanism (not shown), and an electric signal sent from the personal computer through the interface cable is processed by the control circuit of the disk device, By sending commands to the carriage seek mechanism, it is possible to move to the desired track for recording and reproduction. When the magnetic disk 9 is not mounted on the upper carriage 1, the upper carriage support portions 2a in the arms 2 provided on the left and right sides of the upper carriage 1 hold the disk cartridge, and the insertion position and recording / reproduction are performed. It is lifted upward by being supported from both sides by a holder 4 which moves between the positions, a sufficient gap is secured between the upper head 3a and the lower head 3b, and when the magnetic disk 9 is inserted, The magnetic disk 9 does not contact the head 3a or the lower head 3b. In the structure according to the present invention described above, as shown in FIG. 3, when a force F is applied downwardly to the upper carriage 1 due to an impact, the upper carriage 1 is provided on both sides. With 2a as the fulcrum, it overcomes the force of the spring 8 and tries to lean downward while bending the suspension 6. Here, in the case of the conventional disk device, the upper head 3a and the lower head 3b collide with each other as they continue to tilt downward. Since the head body of a magnetic head for recording / reproducing on / from a magnetic disk is composed of ferrite, which is a magnetic material with extremely brittle properties, it must be considered that the collision between the upper head and the lower head immediately causes damage to the head body. I have to. As a matter of course, the damage of the head body is a fatal failure for the magnetic disk device. Not only that, but if you try to perform recording / playback with the head damaged, you risk destroying even the user's valuable data, which can be a huge problem in today's intellectual property rights are respected. . However, according to the structure of the present invention, when the upper carriage 1 tilts downward with the supporting portion 2a as a fulcrum, the upper head 3a is provided on both left and right sides of the upper carriage 1 before it collides with the lower head 3b. Since the impact resistant contact portion 2b provided on the arm portion 2 contacts the holder 4, it is possible to maintain a clearance between the upper head 3a and the lower head 3b even when an impact is applied. It has become possible to prevent the collision between the upper head 3a and the lower head b. Even if the upper carriage support portion 2a and the impact resistant contact portion 2b of the arm portion 2 according to the present invention are separately provided to the upper carriage support arm portion and the impact resistant arm portion, the same effect can be obtained. However, because the arm for shock resistance does not provide the friction resistance when the entire carriage moves to the desired track position as described in the conventional example when the magnetic disk is mounted, or In order to prevent the arm and the holder from interfering with each other when recording / reproducing while the device receives a slight vibration, it must be located above the lower surface of the upper carriage support part. Due to height restrictions, it must be located below the upper surface of the upper carriage. Therefore, the shock-resistant arms are inevitably very thin, and since the upper carriage is generally molded from plastic material, the rigidity is extremely low, and the drive body is subject to excessive shock. If received, there is a risk of the impact-resistant arm itself breaking. If the arm is broken, it will naturally be a fatal defect for a disk device. Therefore, as in the present invention, by extending the arm portion to increase the rigidity of the arm portion itself, and by providing two functions of the upper carriage support portion and the impact resistant contact portion, the collision of the upper and lower heads can be prevented. In addition to the prevention, the impact resistance performance of the arm portion 2 itself of the upper carriage 1 can be enhanced. Lastly, although the present embodiment has been described by taking the case of a 3.5-inch floppy disk drive as an example, it is needless to say that it can be applied to a 5-inch or 8-inch size floppy disk drive and other disk drives.

[0010]

[Effect of device]

 As described above, according to the present invention, there are various practical effects described above among the embodiments of the present invention. Particularly, according to the above configuration of the present invention, the arm portion of the upper carriage is attached to the carriage. By providing a shock-resistant contact part in the arm part in addition to the support part supported by the holder in the forward direction, shock is applied to the entire disk device without the magnetic disk mounted, and the upper carriage is When attempting to bend downward, the impact-resistant contact portion provided on the arm portion of the above-mentioned upper carriage comes into contact with the holder before the upper head and the lower head collide with each other, so that the upper head or the lower head is affected. Prevent damage. Further, since the shock-resistant contact portion provided on the arm portion of the upper carriage is provided at the same height or higher position as the support portion of the holder also provided on the arm portion, the magnetic disk is not mounted. In this state, it is possible to perform recording / playback as before without interfering with the holder.

With such a device, it is possible to drastically improve the shock resistance performance of the disk device by adding a simple and inexpensive means to the conventional structure without requiring a high technology, and the like. The practical effect is extremely large.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a suitable embodiment of a shock resistant structure of a disk device according to the present invention when a magnetic disk is mounted.

FIG. 2 is a schematic side view showing a suitable embodiment of a shock resistant structure of a disk device according to the present invention when a magnetic disk is not mounted.

FIG. 3 is a schematic side view showing a preferred embodiment of a shock resistant structure of a disk device according to the present invention, showing a state when a shock is applied to the disk device.

FIG. 4 is a schematic side view showing a conventional disk device.

FIG. 5 is a schematic side view showing a state when a shock is applied to the conventional disk device.

[Explanation of symbols]

 1 Upper Carriage 2 Arm 2a Upper Carriage Support 2b Impact Resistant Contact 3a Upper Head 3b Lower Head 4 Holder 5 Lower Carriage 6 Suspension 7 Fixing Screw 8 Spring 9 Magnetic Disk

Claims (1)

[Scope of utility model registration request] 1. A pair of heads for holding and recording a magnetic disk for holding and recording information, and comprising a first carriage and a second carriage supported by the first carriage. A pair of carriages that can be moved to a track, and a holder that accommodates the magnetic disk and supports the arm portion of the second carriage when the magnetic disk is not mounted, other than the support portion in the second carriage arm portion. A shock-resistant structure for a disk device, characterized in that a shock-resistant contact portion is provided on the.