JP2624058B2 - Head / arm drive mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to load time adjustment of a disk device used as an external storage device of a personal computer.

[0002]

2. Description of the Related Art FIG. 8 is a perspective view showing a conventional flexible disk drive disclosed, for example, in Nikkei Mechanical, August 7, 1989. In the drawing, reference numeral 1 denotes a cartridge holder, and 2 denotes a guide member which is in contact with the cartridge holder 1 and serves as a guide means for elevating movement. 3 is a holder 1
The shutter opener 4, which is linked to the upper surface of the shutter opener and is engaged with the guide member 2, is a tension spring having one end fixed to the shutter opener 3 and the other end fixed to the holder 1.

5 is a lower head, 6 is a carriage to which the lower head 5 is fixed at the tip, 7 is an upper head provided at a position facing the lower head 5, and 8 is the upper head 7 is fixed. Arm. Reference numeral 9 denotes a plate spring provided on the arm 8 by insert molding or the like, and extended in the longitudinal direction.
Reference numeral 0 denotes a mounting bracket having one end of the leaf spring 9 fixed to the carriage 6. Reference numeral 11 denotes a pressurizing spring which is mounted on the mounting bracket 10 and urges the arm 8 to apply a predetermined pressing force to the heads 5 and 7.

Reference numeral 12 denotes a lift extending from the side surface of the arm 8, 13 is disposed so as to be able to engage with the lift 12, and a rotary lever interlocked with the vertical movement of the cartridge holder 1; It is a shaft that is a rotation axis of the lever 13. Reference numeral 15 denotes a rotary damper which engages with the rotating lever 13 to perform a rotary motion and has a viscous friction load.
Is an urging spring for urging the rotating lever 13 downward.
Reference numeral 17 denotes a holder for fixing the shaft 14 and the rotary damper 15, reference numeral 18 denotes a frame accommodating the above members, and reference numeral 19 denotes a design panel attached to the front surface of the frame 18.

FIG. 9 is an enlarged perspective view of a portion A in FIG.
FIG. 10 shows an enlarged front view of the portion A at the time of unloading described later. In the drawing, reference numeral 20 denotes an L-shaped crank, one end of which is fixed to the center axis of the rotary damper 15, 21 a guide groove provided in a part of the rotary lever 13 into which the crank 20 is inserted, and 22 a guide member 2 The latch plate engages with the latch plate. FIG. 11 shows a disk cartridge, 23 is a disk cartridge, 24 is a shutter mounted on the disk cartridge 23 so as to be openable and closable, and 25 is a recording medium contained in the disk cartridge 23.

Next, the operation will be described. When the disc cartridge 23 is inserted into the cartridge holder 1 from the entrance of the panel 19, the disc cartridge 23 comes into contact with the shutter opener 3. When the insertion is further continued, the engagement between the shutter opener 3 and the guide member 2 is released. Then, the guide member 2 slides in the direction of the panel 19, whereby the cartridge holder 1 is lowered and the disk cartridge 23 is also lowered.

At the same time, since the latch plate 22 is disengaged from the guide member 2, the rotation lever 13 is moved in the direction B by the pressing force of the arm 8 acting on the lift portion 12 and the urging force of the urging spring 16. Rotate. At this time, the crank 20 rotates along the guide groove 21, and the crank 20 rotates the rotary damper 15. Therefore, in response to the viscous friction of the rotary damper 15, the rotating lever 13 rotates at a slow speed, and the lift portion 12 which comes into contact with the rotating lever 13 also starts to slowly descend. The lowering operation of the lift unit 12 is such that the upper head 7 comes into contact with the recording medium 25,
The recording medium 25 is lowered to a state of being sandwiched between the lower head 5 and stopped.

Accordingly, the lower the lowering speed, the softer the impact force when the upper head 7 collides with the recording medium 25, and the more the damage to the recording medium 25 can be prevented.
By the time the upper head 7 is loaded onto the recording medium 25, the recording medium 25 is driven to rotate, and dust and the like on the recording medium 25 are wiped by a liner made of non-woven fabric provided on the disk cartridge 23. 25 has the effect of preventing damage. On the other hand, the rotating lever 1
3 is further rotated by the spring force of the biasing spring 16 after the lowering operation of the upper head 7 is completed, and stops at a predetermined distance from the lift portion 12 in order to avoid interference with the lift portion 12.

The above is the loading operation, and the state where this operation is completed is called the loading state, and is shown in FIG. For the first time in this state, the recording medium 25 by the two
Recording / reproducing operation to / from the device. Unlike the loading state, a state before the disk cartridge 23 is inserted is called an unloading state, and FIG. 13 shows this state.

Japanese Patent Application Laid-Open No. 63-224466 discloses a method of switching the load time in order to combine the load time and the damage of the disk, which are problems of the present invention. However, this method has a limited number of adjustment steps and is discontinuous. In addition, there is a drawback such that it is difficult to change after assembling after setting beforehand.

[0011]

Since the conventional flexible disk drive is constructed as described above, the variation of the viscous friction of the rotary damper 15, the variation of the biasing force of the biasing spring 16, and the variation of the pressing force of the arm 8 are reduced. Due to variations,
The load time of the upper head 7 varies greatly. Therefore,
The loading time is too short and the upper head 7 is loaded to damage the recording medium 25 before the recording medium 25 is sufficiently driven to rotate. On the other hand, the loading time is too long and the loading time is too long in the system side sequence. There were problems such as a timeout.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a head capable of adjusting a load time almost continuously and in a wide range, and which is easy to adjust after installation. An object is to obtain an arm drive mechanism.

[0013]

The head arm driving mechanism according to the present invention has the following means. (1) An engagement is provided on a part of the rotating lever, a gear that engages with the engagement and performs a rotational motion, a rotary damper having a rotation center axis of the gear, and one end supported by the gear. A spring means was supported at one end.

(2) Alternatively, a rotary damper that rotates by engaging with the turning operation of the turning lever, a mesh fixed to the rotating shaft of the rotary damper, a gear meshing with the same, and a gear A plate having a rotating shaft fixed thereto and spring means supported at one end by the gear and supported at the other end by the plate.

(3) Alternatively, an urging spring for urging the rotating lever to rotate, a rotating mechanism engaging with the rotating operation of the rotating lever to perform a rotating motion, and being fixed to the rotating mechanism. The gear includes a gear meshing with the rotating mechanism, a plate to which a rotating shaft of the gear is fixed, and a pad plate capable of contacting the gear and applying a predetermined frictional load.

(4) Alternatively, a rotary damper which engages with the rotating operation of the rotating lever to perform a rotating movement, and one end of which is in contact with the rotating lever and the other end of which is hooked by the holder, is provided. An urging spring for rotationally urging the
The holder is provided with a plurality of locking grooves for the urging springs distributed in the rotation direction of the lever.

[0017]

The head / arm drive mechanism according to the present invention comprises:
A load time is determined by a mechanism that adjusts a spring force in cooperation with an urging spring that urges the rotation lever to rotate, and balances with a rotary damper or a frictional load.

[0018]

【Example】

Embodiment 1 FIG. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 26 denotes a mesh provided on a part of the rotary lever 13, and 27 denotes a gear fixed to the central shaft of the rotary damper 15 and meshed with the mesh 13. Reference numeral 28 denotes a spiral spring having one end fixed to the gear 27 and the other end hooked on a part of the rotary damper 15. FIG. 2 is an exploded view of the rotary damper 15, the gear 27, and the spiral spring 28. Reference numeral 29 denotes a spring hole into which one end of the spiral spring 28 provided on the gear 27 is inserted and attached.

Next, the operation will be described. Rotating lever 1
Until the rotation of 3 starts, it is the same as that of the prior art, and the description is omitted. When the rotating lever 13 starts rotating by the pressing force of the arm 8 and the rewinding force of the spiral spring 28, the meshing 26 rotates while meshing with the gear 27. The rotation time is equal to the load time of the upper head 7, and is determined by the viscous friction torque of the rotary damper 15, the pressing force of the arm 8, and the unwind force of the spiral spring 28. Before assembling the rotating lever 13, the winding amount of the spiral spring 28 is adjusted by rotating the gear 27 in accordance with the viscous friction torque of the rotary damper 15 and the pressing force of the arm 8, thereby rewinding the spiral spring 28. The force can be changed, which allows the load time to be adjusted.

Embodiment 2 FIG. FIG. 3 shows an embodiment of the second aspect of the present invention. 29 is a gear meshing with the meshing 26, 30 is a plate on which the gear 29 is rotatably mounted, 31
Are fixing screws for attaching the plate 30 to the frame 18. A spring 28 such as a spiral spring is interposed between the gear 29 and the plate 30. And one end is gear 2
9 and the other end is fixed to the plate 30. In order to adjust the rotation time of the rotation lever 13, that is, the load time, the gear 29 is rotated in advance, a predetermined unwinding force is applied to the spring 28, and the spring 28 is assembled so as to mesh with the engagement 26. What is necessary is just to fix 30 to the frame 18 with the fixing screw 31, and adjustment is easy. Although the structure is slightly different, an effect similar to that of the first embodiment can be obtained. Further, the gear may be provided on the same plane as the rotary damper.

Embodiment 3 FIG. An embodiment of the invention according to claim 3 will be described. Although the rotary damper has been described in the above embodiment, a rotary mechanism (rotor) 32 having no load such as viscous friction may be used instead of the rotary damper as long as the configuration is as shown in FIG. FIG. 5 is a cross-sectional view illustrating details of the pad plate portion. In the figure, reference numeral 33 denotes a circular pad plate provided with a screw portion at the center so as to be fixed to the plate 30. Reference numeral 34 denotes a pad A attached to the lower surface of the pad plate 33, that is, a pad A attached to the side on which the screw portion is provided. Reference numeral 35 denotes a pad B arranged at a position facing the pad A34 and attached inside the gear 29. Reference numeral 36 denotes an elastic means such as an O-ring for applying an elastic force to the pad plate 33 in the axial direction.

Next, a method of adjusting the rotation time of the rotation lever 13, that is, the load time, will be described. By rotating the pad plate 33 in advance and changing the screwing amount, the contact pressure between the pad A34 and the pad B35 is changed, and the frictional force generated therebetween is adjusted. Then, it is assembled so as to mesh with the mesh 26, and the plate 3
If 0 is fixed to the frame 18 with the fixing screw 31, the same effect as in the first embodiment can be obtained.

Embodiment 4 FIG. FIG. 6 shows an embodiment of the invention of claim 4.
A description will be given based on a perspective view of FIG. In the figure, reference numeral 37 denotes a locking portion for stopping one end of a spring provided on the holder 17. FIG. 7 shows a view of the holder portion viewed from the back side. One end of the biasing spring 16 is connected to X ₁ -X
_The amount of winding of the urging spring 16 changes depending on the position of the position No. 6, and as a result, the urging force changes in six stages from weak to strong, and the load time can be adjusted in six stages.
It has the same effect as. In this embodiment, six spring hook portions are provided. However, the number of spring hook portions may be increased, the pitch may be reduced, and N pieces may be provided, and the load time may be finely adjusted in N steps. In addition, the setting can be easily changed by utilizing the elasticity of the spring even after the assembly.

[0024]

Since the present invention is configured as described above, variations in the viscous friction torque of the rotary damper,
Even if there is a variation in the pressing force of the arm, etc., and even after the device is assembled, there is an effect that the load time can be adjusted to an arbitrary load time from a fine stage.

[Brief description of the drawings]

FIG. 1 is a perspective view of a flexible disk device according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the vicinity of a rotary damper of the flexible disk device according to the first embodiment of the present invention.

FIG. 3 is a perspective view of a flexible disk device according to a second embodiment of the present invention.

FIG. 4 is a perspective view of a flexible disk device according to a third embodiment of the present invention.

FIG. 5 is a sectional view of a pad plate portion of a flexible disk device according to a third embodiment of the present invention.

FIG. 6 is a perspective view of a flexible disk drive according to Embodiment 4 of the present invention.

FIG. 7 is a plan view of a locking portion of a flexible disk device according to Embodiment 4 of the present invention as viewed from the back side.

FIG. 8 is a perspective view of a conventional flexible disk device.

FIG. 9 is a perspective view of a portion A in FIG.

FIG. 10 is a plan view of a portion A in FIG.

FIG. 11 is a perspective view of a disk cartridge.

FIG. 12 is a side view of a carriage showing a loading state of a conventional flexible disk device.

FIG. 13 is a side view of a carriage showing an unloaded state of a conventional flexible disk device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cartridge holder 2 Guide member 5 Lower head 6 Carriage 7 Upper head 8 Arm 12 Lift part 13 Rotating lever 15 Rotary damper 16 Urging spring 26 Meshing 27 Gear 28 Winding spring 30 Plate 32 Rotating mechanism (rotor) 33 Pad plate 37 Spring locking part

Claims (4)

(57) [Claims] A guide member for guiding a vertical movement of a cartridge holder for receiving a disk cartridge; an arm mounted with a head and rotating in conjunction with the vertical movement; and a part of the arm during the vertical movement, A rotating lever that rotates while moving up and down in the same direction as the arm, and a meshing portion is provided on a part of the arm; a gear that meshes with the meshing portion of the rotating lever to rotate; and regulates the speed of the vertical movement of the head. A rotary damper having a rotation center concentric with the gear that makes the rotational movement; and a head spring that has one end supported by the gear that makes the rotary movement and the other end supported by the rotary damper.
Arm drive mechanism. 2. A guide member for guiding a vertical movement of a cartridge holder for receiving a disk cartridge, an arm mounted with a head and rotating in conjunction with the vertical movement, a part of the arm during the vertical movement, A rotary lever that rotates by moving up and down in the same direction as the arm; a rotary damper that engages with the rotary lever and rotates in the same direction; A head-arm drive including a wound spring, one end of which is supported by the rotating gear, and the other end of which is supported by a fixed plate. mechanism. 3. A guide member for guiding a vertical movement of a cartridge holder for receiving a disk cartridge, an arm having a head mounted thereon and rotating in conjunction with the vertical movement, and a part of the arm during the vertical movement, A rotating lever that moves up and down in the same direction as the arm and rotates; a rotor that engages with the rotating lever and rotates in the same direction; a rotor with a fixed meshing portion; and a gear that meshes with the meshing portion and rotates. A head / arm drive mechanism provided with a pad plate provided in conjunction with the rotating gear to apply a frictional load and adjust the amount of the frictional load; 4. A guide member for guiding a lifting / lowering movement of a cartridge holder for receiving a disk cartridge; an arm mounted with a head and rotating in conjunction with the lifting / lowering movement; A rotating lever that rotates by moving up and down in the same direction as the arm; a rotary damper that engages with the rotating lever and rotates in the same direction; regulates the speed of lifting and lowering the head; and a spring that rotates the rotating lever. A head-arm drive mechanism comprising: a biasing spring that pushes one end of the biasing lever in the rotation direction; and a plurality of locking grooves distributed in the rotation direction of the rotation lever that locks the other end of the biasing spring.