JPS6217296B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention clamps a magnetic disk between a rotary drive body and a clamp body in conjunction with the closing operation of a lid provided in a magnetic disk insertion/ejection opening, and in conjunction with the opening operation of the lid. The present invention relates to a magnetic disk drive device in which the clamp is released, and particularly to an improvement in which the lid can be easily closed and the clamp can be reliably released during the opening operation.

2. Description of the Related Art Magnetic disk drive devices in which clamping and unclamping of a magnetic disk are automatically performed in conjunction with opening/closing operations of a lid have been known in the past. However, in the conventional device of this kind, a clamp actuating member is engaged with a clamp body provided on the same axis as the rotary drive body, and a spring is applied to this actuating member to constantly operate the clamp body.
The rotational drive body is biased in the direction of separation, and in conjunction with the closing operation of the lid body, the clamp actuation member is displaced against the spring, and the clamp body is turned into the rotation drive body by the actuation member via an elastic member. Since the magnetic disk is clamped between the rotary drive body and the clamp body by pressure contact, the spring acts as a load when closing the lid, making it impossible to close the lid lightly. There were flaws. In addition, when the lid is opened, the clamp body is separated from the rotating drive body by a spring, and the clamp body has a mechanism that fits into the center hole of the magnetic disk to restrict the movement of the disk on a plane. Since the positioning protrusion is provided, the elasticity of the spring does not allow the positioning protrusion to be pulled out of the central hole of the disk, resulting in a disadvantage that the clamp cannot be released reliably. In order to ensure that the clamp is released, it may be possible to strengthen the spring that pulls the clamp body away from the rotary drive body, but this would make the operation of closing the lid body even more difficult, which is undesirable. .

The present invention has been made based on the above circumstances, and its purpose is to clamp a magnetic disk between a rotary drive body and a clamp body in conjunction with the closing operation of the lid body, and to clamp the magnetic disk in conjunction with the closing operation of the lid body. To provide a magnetic disk drive device which is configured to release its clamp in conjunction with each other, so that a lid can be easily closed and the clamp can be released reliably.

Hereinafter, details of the present invention will be explained based on embodiments shown in the drawings. FIG. 1 is a plan view of the magnetic disk drive device, and FIG. 2 is a sectional view of the device as seen from the right side. A magnetic disk insertion/ejection opening 2 is provided in the front part of the frame 1. The outlet 2 is opened and closed by a lid 4 which is rotatable about a shaft 3. A bearing 5 is provided on the mounting plate portion 1a of the frame 1, a rotation driver 7 is provided at one end of a rotating shaft 6 inserted through the bearing 5, and a pulley 8 is provided at the other end of the rotating shaft 6. Each is fixed. This pulley 8 is connected via an endless belt 11 to a motor pulley 10 fixed to the shaft of a motor 9, and is rotationally driven by the motor 9. Another motor 12 capable of forward and reverse rotation is attached to the mounting plate portion 1a, and a cam plate 13 having a spiral cam groove 13a on one side is fixed to the shaft of the motor 12. In the figure, reference numerals 14 and 14 denote mutually parallel guide shafts supported at both ends by the mounting plate portion 1a, and a carriage 15 is mounted on both guide shafts 14, 14 so as to be freely forward and backward. and,
One end of a leaf spring 16 is fixed to this carriage 15, the other end of the leaf spring 16 is opposed to the cam plate 13, and a hemispherical body 17 that fits into the cam groove 13a is attached to the other end of the leaf spring. , the rotation of the motor 12 is converted into a linear motion of the carriage 15. Further, a magnetic head 18 is attached to the carriage 15, and one end of a pad arm 19 is rotatably attached via a shaft 20.
A pad 21 attached to the other end of the magnetic head 9 can be freely moved toward and away from the magnetic recording surface of the magnetic head 18. Note that the pad arm 19 has an engaging protrusion 1 extending laterally.
The pad 21 is always urged in the direction of bringing the pad 21 into contact with the magnetic head 18 by a deployment spring 22 which has a diameter 9a and is attached to the shaft 20. Another pad arm 23 is attached to the shaft 24 on the mounting plate portion 1a.
It is rotatably attached via the A pad 25 is attached to this pad arm 23. Further, one end of the pad arm 23 is connected to the engaging protrusion 19a.
A tension spring 26 is placed between the other end and the mounting plate 1a.
It is biased in the direction of pushing up 9a. and,
This pad arm 23 is driven by a magnet 27 in the anti-biasing direction, and when this pad arm 23 rotates in the counter-biasing direction, the pad arm 19 follows this and moves the pad 21.
is brought into contact with the magnetic head 18.

The upper end of the guide shaft 28 is fixed to the support arm 1b formed above the mounting plate 1a of the frame 1. This guide shaft 28 is provided on the same axis as the rotary drive body 7, and a sleeve 29 is attached to the outer periphery of the guide shaft 28 so as to be able to move forward and backward. The sleeve 29 has flange parts 29a and 29b on the outer periphery of both ends, an annular spring receiver 30 is attached to the outer periphery of the sleeve 29, and a compression coil spring 31 as an elastic member is interposed between the spring receiver 30 and the lower flange part 29b. I'm letting you do it. Note that a large diameter retaining portion 28a is formed at the lower end of the guide shaft 28. sleeve 2
A clamp body 32 is attached to the outer periphery of the clamp body 9 so as to be rotatable and movable back and forth in the axial direction. This clamp body 3
2 faces the rotary drive body 7 from above, and the rotary drive body 7 has a recess 7a in the center and a clamp body 3.
At the center of 2 is a positioning protrusion 3 that fits into the recess 7a.
2a are provided respectively. The rotary drive body 7 has an annular contact surface 7b at the upper end of the peripheral wall of the recess 7a, and the clamp body 32 has an annular pressing surface 32b facing the annular contact surface 7b around the positioning protrusion 32a. The spring 31 is held between the spring receiver 30 and the spring receiver 30. Further, the clamp body 32 is prevented from being pulled out from the sleeve 29 by the lower flange portion 29b. A clamp operating member 33 is rotatably mounted on the side wall of the support arm 1b via a shaft 34. As shown in FIG. 4, this actuating member 33 has a shape in which two side walls 33a and 33b are connected at one end and near the other end, and one end is a pressing end 33c and the other end is a bifurcated engagement. An end 33d is provided, and a portion close to the pressing end 33c is attached to the shaft 34. In addition, this clamp operating member 33
A locking member 35 and a release member 36 are attached as follows. In other words, the locking member 35 has a shaft 37 located approximately midway between the shaft 34 and the engaging end 33d.
The release member 36 is rotatably mounted via the release member 36.
is rotatably mounted on the shaft 34, and each member 35, 36 is sandwiched between both side walls 33a, 33b of the clamp actuating member 33.
The locking member 35 includes a locking claw 35a and a pressing portion 35b.
and a spring hook 35c, and is always biased in a fixed direction by a tension spring 38 stretched between the spring hook 35c and the support arm 1b. Further, the release member 36 has a lock release portion 36a and a reset operation portion 36b that are substantially parallel to each other.
and a pressing part 36c facing the pressing end 33c of the clamp actuating member 33, with the unlocking part 36a facing the back surface of the pressing part 35b of the locking member 35, and the tip of the reset operating part 36b being clamped. It is made to face the back side of the actuating member 33. In addition,
The reset operation part 36b is made of an elastic piece,
By bringing the reset operating portion 36b and the vicinity of the pressing end into contact with the clamp operating member 33, the distance between the pressing end 33c of the clamp operating member 33 and the pressing portion 36c of the release member 36 is kept constant. Thus, the bifurcated engagement end 33d of the clamp actuating member 33 sandwiches the sleeve 29 between the upper flange portion 29a and the spring receiver 30, and as the clamp actuating member 33 rotates, the clamp body 32 is moved up and down in the axial direction. Note that the clamp actuating member 33 is
When rotating clockwise in the figure, the clamp body 32 descends, but the annular pressing surface 32b of the clamp body 32
After contacting the annular contact surface 7b of the rotary drive body 7, the engaging end 33d pushes the clamp body 32 via the spring 31, and the spring 31 is placed between the annular pressing surface 32b and the annular contact surface 7b. A pressing force corresponding to the elastic force of is applied. A stopper 39 is further rotatably mounted on the side wall of the support arm 16 via a shaft 40. This stopper 39 is elastic, and has one end in contact with the support arm 1b from below and the other end in contact with the lower end of the adjustment screw 41 from below to be prohibited from rotating. When 41 is turned, it is elastically deformed and the height position of the other end is changed. A locking claw 35a of the locking member 35 can be locked to the other end of the stopper 39, and the locking member 35 is held in a locking position relative to the stopper 39 by a spring 38. Note that the clamp operating member 33
When the locking member 35 is locked to the stopper 39, the clamp body 32 is held in a pressure contact position with respect to the rotary drive body, but when the locking member 35 is removed from the stopper 39, it is locked by the spring 38. The clamp body 32 is pulled up via the member 35.
is pulled away from the rotary drive body 7.

The lid body 4 is equipped with a pressure roller 42 as an operating protrusion on the inner surface side, and a pressure roller 42 that is adjacent to the upper and lower sides.
It has a pair of guide protrusions 4a and 4b, and the tip of the upper surface of the lower guide protrusion 4b is inclined.

The insertion and removal of the magnetic disk 43 is performed as follows. That is, although FIG. 3 shows a state in which the lid body 4 is opened, in this state, the pressing end 33c of the clamp actuating member 33 is pressed at the upper edge of the lid body 4.
The engaging end 33 of the actuating member 33 is pressed from above.
d is held at an upper position, thereby holding the clamp body 32 at a position above and apart from the rotary drive body 7. Further, the locking pawl 35 is removed from the stopper 39, and the locking pawl 35a is positioned above the stopper 39. Then, insert the magnetic disk 43 enclosed in the cartridge 43a from the insertion/ejection opening 2,
The left and right edges of the cartridge 43a are pushed horizontally along guide grooves 44a and 44b (see FIG. 1) formed on the left and right sides of the frame 1, and the disk 43 is moved between the rotary drive body 7 and the magnetic head 18. After being positioned on each upper surface, the lid body 4 is closed. Then, the lower guide protrusion 4 protruding from the inner surface of the lid body 4
After pushing the rear end of the disk cartridge 43a on the inclined surface b to position the cartridge 43a at a predetermined loading position, the pressing end 33c of the clamp actuating member 33 is pushed by the pressing roller 42, and the clamp actuating member 33 is attached to the spring 38. You will be able to resist and rotate it. As a result, the engaging end 3 of the actuating member 33
3d is lowered, the clamp body 32 is attached to the guide shaft 2.
8, and passes the positioning protrusion 32a through the central hole of the disk 43 into the recess 7a of the rotary drive body 7.
Then, the annular pressing surface 32b is brought into contact with the periphery of the center hole of the disk 43. When the lid body 4 is further moved excessively in the direction, the clamp operating member 33 rotates while compressing the spring 31 at the engaging end 32d, and the locking member 35 moves the locking pawl 35a to the stopper 3.
9 to prevent the clamp operating member 33 from returning upward. Therefore, the disk 43 connects the periphery of the center hole with the annular contact surface 7b of the rotary drive body 7 and the clamp body 3.
The clamp body 32 and the disk 43 are pressed and clamped by the elastic force of the spring 31 with the annular pressing surface 32b of No. 2, and when the rotary drive body 7 is rotated by rotating the motor 9, the clamp body 32 and the disk 43 are rotated together with this. become.

On the other hand, when the pad arm 23 is rotated against the spring 26 by energizing the magnet 27, the pad 25 attached to the pad arm 23 moves from above the cartridge 43a to the disk 4.
3 is pressed, the inner surface of the cartridge 43a comes into sliding contact with the rotating disk 43, and the surface of the disk 43 is cleaned. Further, following the rotation of the clamp arm 23, another pad arm 19 is also rotated by the spring 22, and the pad 21 attached to this pad arm 19 brings the disk 43 into close contact with the magnetic head 18.

Further, when the cam plate 13 is rotated by being driven by the motor 12, the spiral cam groove 13a provided on the cam plate 13 and the hemispherical body 17 attached to the carriage 15 via the leaf spring 16 slide together, causing the carriage 15 to rotate. moves straight along two guide shafts 14, 14. As a result, the magnetic head 18 mounted on the carriage 15 moves in the radial direction of the disk 43, so that magnetic recording is performed on the surface of the disk 43 by a combination of the rotation of the disk 43 and the forward and backward movement of the magnetic head 18. It becomes like this.

Next, when removing the disk 43 in the operating state shown in FIGS. 1 and 2, first stop the motors 9 and 12, stop energizing the magnet 27, and open the lid 4. , the pressing roller 42 presses the pressing portion 36c of the release member 36. Therefore, the release member 36 rotates while elastically deforming the reset operation part 36b made of an elastic piece, pushes the pressing part 35b of the locking member 35 with the lock release part 36a, and releases the locking pawl 35a of the locking member 35. stoppa 39
Remove it. Then, the clamp operating member 33 rotates counterclockwise (in FIG. 2) due to the elastic restoring force of the reset operating portion 36b and the tension of the spring 38, and raises the sleeve 29 at the engaging end 33d.
Together with this, the clamp body 32 is raised. Therefore, the annular pressing surface 32b of the clamp body 32 is separated from the disk 43, and then the positioning protrusion 32a is extracted from the recess 7a of the rotary drive body 7 and the center hole of the disk 43, and the clamped state is released. Further, when the lid body 4 is opened further, the pressing roller 42 comes off from the release member 36, but the positioning protrusion 32a of the clamp body 32 is already attached to the disk 43.
Since it is separated from the central hole of the clamp body 32
is sufficiently pulled up only by the spring 38, and the third
The disk 43 can be taken out through the insertion/ejection opening 2 as shown by arrow B in the figure. In addition, the lid body 4 has a clamp actuating member 3 at its upper edge in the maximum open position.
3 is pressed from above to forcibly prohibit the clamp body 32 from descending.

Next, in order to adjust the clamping force in the disk loading state shown in FIGS. 1 and 2, the adjustment screw 41 may be rotated. That is, when the adjusting screw 41 is rotated in the tightening direction, the stopper 39
is elastically deformed downward to attach the locking member 35 to the mounting shaft 3.
Press down on 7. Therefore, the clamp actuating member 33 rotates in a direction that compresses the spring 31, and as a result, the pressure clamping force, that is, the clamping force acting between the clamp body 32 and the rotary drive body 7 is strengthened. Conversely, if the adjustment screw 41 is rotated in the loosening direction, the clamping force will be weakened.

According to the magnetic disk drive device configured as described above, the clamp is released by the tension of the spring 38 and the elastic restoring force of the reset operation part 36b of the release member 36, so even when the tension of the spring 38 is small, Also, by setting the elastic force of the reset operation portion 36b to a large value, the clamp can be released reliably. By setting the tension of the spring 38 small, the lid 4
Since the load during the closing operation of the lid body 4 is reduced,
You will be able to close it easily. Further, since the lid body 4 engages with the clamp actuating member 33 at the maximum open position and prevents the clamp body 32 from moving in the direction of the rotary drive body 7, the spring 38 The tension can be set small, and the effect of making the closing operation of the lid body 4 easier can be obtained. In addition, since the clamp actuating member 33 and the releasing member 36 are mounted on the common shaft 34, the number of parts (shaft parts) can be reduced, resulting in a simple structure and the advantage that the entire structure can be made compact. be.

Furthermore, by moving the stopper 39 that locks the locking member 35, the clamp actuating member 33 and the clamp body 32 are moved.
Since the elastic force of the elastic member (spring 31) interposed between can be adjusted, the clamping force can be adjusted extremely easily.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a plan view of a magnetic disk drive device, Fig. 2 is a side sectional view showing the operating state of the device, and Fig. 3 is a stop state of the device. FIG. 4 is a side sectional view showing only the main parts, and FIG. 4 is an exploded perspective view showing some parts used in the device. 2...Magnetic disk insertion/removal port, 4...Lid body, 7...
...Rotation drive body, 7a... Annular contact surface, 18... Magnetic head, 31... Elastic member (compression coil spring), 32... Clamp body, 32a... Positioning protrusion, 32b... Annular pressing surface, 33 ... Clamp operating member, 35 ... Locking member, 36 ... Release member, 36a ... Lock release part, 36b ... Reset operation part, 38 ... Spring, 39 ... Stopper, 42 ... Operation protrusion (press roller), 43...
Magnetic disk, 43a... disk cartridge.

Claims (1)

[Scope of Claims] 1. A rotary drive body having an annular contact surface that can come into contact with the periphery of the center hole of the magnetic disk, and a rotary drive body that is rotatably provided on the same axis as the rotary drive body and movable in the axial direction, and that is provided at the center of the magnetic disk. a clamp body having a positioning protrusion that can be fitted into the hole and an annular pressing surface facing the annular contact surface of the drive body; a clamp operating member that separates the body from the rotating drive body or presses the annular pressing surface of the clamp body against the annular contact surface of the rotating drive body via an elastic member; and a clamp operating member that is rotatably attached to the clamp operating member and rotates. a locking member whose end portion is locked to a predetermined stopper to hold the clamp body in a pressure contact position with respect to the rotary drive body; A spring biases the clamp body in the direction of the counter-rotation drive body through a member, and a spring that rotates to open and close the magnetic disk insertion/ejection opening, and an operating protrusion provided on the inner surface of the clamp operating member when the magnetic disk insertion/ejection opening is closed. A lid body that presses and rotates against the spring and presses the clamp body against the rotational drive body through the actuating member, and a reset operation part that includes a lock release part and an elastic piece, and is rotatable. When the lid is opened, the locking member is pressed and rotated by the operating protrusion, and after the locking member is pressed and rotated by the locking release portion and removed from the stopper, the reset operation portion releases the clamp. a release member that elastically presses and rotates the operating member to separate the clamp body from the rotary drive body; and a magnet capable of contacting the magnetic disk when the magnetic disk is pressed and held between the rotary drive body and the clamp body. A magnetic disk drive device comprising a head. 2. The magnetic disk drive device according to claim 1, wherein the lid engages with the clamp actuating member at the maximum open position and prevents the clamp from moving toward the rotational drive member. 3. The magnetic disk drive device according to claim 1, wherein the clamp actuating member and the releasing member are mounted on a common shaft. 4. The magnetic disk drive according to claim 1, wherein the elastic force of an elastic member interposed between the clamp actuating member and the clamp body can be adjusted by moving a stopper that locks the locking member. Device.