JPH02236877A - Carriage mechanism of floppy disk device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a carriage mechanism for a double-sided floppy disk device.

(Prior Art) Conventionally, in a floppy disk device (FDD), as shown in Fig. 9, a carriage equipped with an SO head and an S
A carriage mechanism 10 is provided that includes a head arm that supports one head.

The carriage is configured to move in the radial direction of the recording medium. One end of the head arm is attached to the carriage, and the head arm is configured to be movable up and down with respect to the carriage. When a recording medium is inserted into the FDD, the head arm descends toward the carriage, and the S1 head loads the surface of the recording medium. This pressure from the S1 head causes the SO head mounted on the carriage and the surface of the recording medium (S
1 (opposite surface on the head side). The recording medium is held by a receiver 11 shown in FIG. 9 and chucked by a spindle mechanism (rotation mechanism).

By the way, when the S1 head descends due to the movement of the head arm and contacts the surface of the recording medium during head loading, if this descending speed (head loading speed) is high,
The impact upon contact will be greater.

For this reason, a situation in which the S1 head or the surface of the recording medium is easily damaged occurs. Additionally, if the head loading speed is high, the S1 head may push the dust etc. onto the surface of the recording medium before the dust etc. adhering to the recording medium is removed by the rotational movement of the recording medium. .

On the other hand, as shown in FIG. 9, a head cable l2 is connected to each head, and this head cable l2 is connected to a circuit board l3 having a read/write circuit and the like. The head cable l2 is made of FPC (flexible printed cable), and as shown in Fig. 10,
The head l4 is connected to the circuit board 13 through the connector 15, and read/write signals are transferred. However, since the head cable 12 moves with the movement of the carriage mechanism 1O, a relatively wide range of space is required for arranging the head cable 12. This is an obstacle to miniaturization of FDDs. Further, since the connector 15 is used, it is an obstacle to reducing the number of parts.

(Problems to be Solved by the Invention) Conventionally, in the carriage mechanism of an FDD, when the head loading speed is high, the surface of the head or the recording medium may be damaged, or dust etc. may be attached to the surface of the recording medium. Situations like this are likely to occur.

SUMMARY OF THE INVENTION An object of the present invention is to provide a carriage for a floppy disk drive that can suppress head loading speed, prevent damage to the head or recording medium due to head loading, and reduce the possibility of dust etc. adhering to the recording medium. The goal is to provide a mechanism.

[Structure of the Invention] (Means and Effects for Solving the Problems) The present invention provides a head arm that supports an S1 head and an SO
In a carriage mechanism consisting of a carriage on which a head is mounted, a damper mechanism is attached to the carriage to perform a damper action to suppress the head loading speed during the loading operation of the head arm. With such a configuration, head loading speed can be suppressed.

(Example) Examples of the present invention will be described below with reference to the drawings. Fig. 1 (side view) and Fig. 2 (plan view) are F related to the same embodiment.
FIG. 3 is a diagram showing the configuration of a carriage mechanism of a DD. As shown in FIG. 1, the carriage mechanism of the same embodiment includes a carriage 2l on which an SO head 20 is mounted and a head arm 23 that supports an S1 head 22. One end of the head arm 23 is attached to the carriage 2l by a screw 24, and the S1 head 22 is attached to the carriage 2l using the screw 24 as a fulcrum.
The supporting part side is configured to be vertically movable. The carriage 2l is driven by a lead screw mechanism (see Figure 3).
It moves in the radial direction (arrow A) of the recording medium 25 while being guided by the rails 2B.

In this embodiment, a damper mechanism 30 for suppressing the head loading speed is provided on the side of the carriage 2l. The damper machine side 30 includes a support member 32 that rotatably supports one end of a damper arm 31, and the other end of the damper arm 3l engages with a pin member 33 fixed to the head arm 23.

The vertical movement of the head arm 23 is transmitted to the damper arm 3l through the bin member 33, and the damper arm 3l rotates about the support member 32 as a fulcrum (arrow B).

On the other hand, as shown in FIG. 2, the head arm 23 is always urged toward the carriage 2l by a load spring 34. Further, the head arm 23 is provided with an unloading member 35, and by vertically moving the receiver 11 (see FIG. 9) that engages with the unloading member 35,
The head arm 23 is in a loaded/unloaded state. An engaging portion 36 for engaging with a lead screw mechanism is provided on the side of the carriage 2l. As shown in FIG. 3 (plan view), the lead screw mechanism includes a lead screw 88 for transmitting the driving force of the stepping motor 37.
has.

Next, the effects of this embodiment will be explained. First, before the recording medium 25 is inserted into the FDD, the head arm 23 is in an unloaded state in which it is raised upward relative to the carriage 2l, as shown in FIG. This unloaded state is maintained by moving the receiver l1, as described above. In this case, the damper arm 31 on the side 30 of the damper machine is rotated upward by the pin member 33 in accordance with the movement of the head arm 23, as shown in FIG.

Next, when the recording medium 25 is inserted into the FDD, it is held in the receiver l1 as described above.
The lowering of the shaft causes the shaft to be chucked by the spindle mechanism. As the receiver 33 descends, the head arm 23 descends toward the carriage 2l, as shown in FIG. 5, and shifts to a loading operation. At this time, head arm 23
In response to the lowering of the damper arm 3l, the damper arm 3l rotates in the same direction. In other words, the head arm 23 descends toward the carriage 2l while its descending speed is suppressed by the damper arm 3l that engages with the pin member 33.

When the S1 head 22 comes into contact with the surface of the recording medium 25 due to the lowering of the head arm 23, the recording medium 25 is pressed toward the SO head 20 side. As a result, as shown in FIG. 6, each head 20. 22 is in a loaded state in which the recording medium 25 is in contact with each surface. In this state, each head 20.
22 reads/writes to/from the recording medium 25. When the eject button 39 shown in FIG. 3 is operated after the read/write is completed, the receiver l1 is raised and the recording medium 25 is ejected from the FDD. As the receiver l1 rises, the head arm 2
3 is in an unloaded state as shown in FIG.

In this way, the head arm 23 is engaged with the damper mechanism 30, and when moving up and down, the damper arm 3l
This will be accompanied by a rotational movement. Therefore, during the loading operation in which the head arm 23 descends, the damper arm 3l
Due to the rotational movement of the head arm 23, the load speed, which is the downward speed of the head arm 23, is suppressed. Therefore, S1
The head 22 will contact the surface of the recording medium 25 at a controlled loading speed. As a result, the S1 head 22
The impact upon contact with the recording medium 25 is reduced.

FIGS. 7 and 8 are diagrams showing the configuration of a carriage mechanism according to the same embodiment. As shown in FIG. 8, a head cable 40 connected to the SO head 20 is provided on the bottom surface of the carriage 2l. Further, as shown in FIG. 7, a circuit board 4 is placed at a position facing the bottom surface of the carriage 21.
1 is provided. This circuit board 41 is provided with a head cable 40 in a range corresponding to the movement range of the carriage 21.
A circuit pattern is formed that makes contact with the

In such a carriage mechanism, when the recording medium 25 is inserted into the FDD, as shown in FIG.
0. 22 is in a loaded state in which it comes into contact with the recording medium 25. The carriage 2l carries each head 20. 22 leads/
Move to the position corresponding to the target track to be written. At this time, as the carriage 2l moves, the head cable 40 moves while being in contact with the circuit pattern of the circuit board 41. Each head 20. 22 executes read/write when positioned on the target track. In this case, read/write signals are transmitted to each head 20 . 22 and the circuit pattern of the circuit board 4l. The circuit pattern is connected to a read/write circuit mounted on the circuit board 41.

With such a configuration, the conventional F as shown in FIG.
The head cable l2 consisting of a PC becomes unnecessary. Since the head cable 40 of this embodiment is provided in a limited area on the bottom surface of the carriage 2l, there is no need for a wide space for the cable as in the conventional case. Furthermore, since the circuit board 41 is formed with a circuit pattern for contacting the head cable 40, the conventional connector l
5 becomes unnecessary.

[Effects of the Invention] As described in detail above, according to the present invention, the head loading speed when the head loads the recording medium can be suppressed. Therefore, it is possible to reduce the impact when loading the head and prevent damage to the surface of the head or the recording medium. Furthermore, dust and the like that have previously adhered to the surface of the recording medium can be removed by the rotational movement of the recording medium before the head is loaded. Therefore, it is possible to prevent dust and the like from adhering to the surface of the recording medium due to head loading.

[Brief explanation of drawings]

FIG. 1 is a side view showing the configuration of a carriage mechanism according to an embodiment of the present invention, FIGS. 2 and 3 are plan views of the same embodiment, and FIGS. 4 to 6 are operations of the same embodiment, respectively. 7 is a side view showing the structure of a carriage mechanism according to an embodiment of the present invention, FIG. 8 is a plan view of the same embodiment, and FIG. 9 is a structure of a conventional floppy disk device. FIG. 10 is a perspective view illustrating the configuration of a conventional head cable. 20... SO head, 21... Carriage, 22.
...S1 head, 23...head arm, 25...
Recording medium, 30... Damper mechanism, 40... Head cable, 4l... Circuit board. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Scope of Claims] A carriage on which an S0 head is mounted; a head arm attached to the carriage to support an S1 head facing the S0 head and configured to be movable according to loading and unloading; 1. A carriage mechanism for a floppy disk device, comprising: a damper mechanism attached to the carriage to perform a damper action to suppress head loading speed during loading operation of the head arm.