JPH0732713U - Disk drive device - Google Patents

Abstract

(57) [Abstract] [Purpose] The position of the magnetic head with respect to the disk is set easily and with high accuracy. [Structure] In a mini disk drive device, with a magnetic head 36 raised, a disk holder 11 is rotated upward around a pin 14 to mount a cartridge 18 on the disk holder 11. Then, after rotating the disc holder 11 downward to support it on the mount 12,
After the magnetic head 36 is lowered and brought into contact with the mini disk 16, recording or reproducing is performed on the mini disk 16. A contact portion 50 is formed on the rod-shaped magnetic head support portion 34 that supports the magnetic head 36. When the magnetic head 36 is lowered, the contact portion 50 contacts the cartridge 18, and the position of the magnetic head 36 with respect to the mini disk 16 is accurately set.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disk drive device capable of easily positioning a magnetic head.

[0002]

[Prior art]

 FIG. 4 shows an example of a conventional mini disk drive device. In this mini disk drive device, a disk holder 11 is arranged in a cabinet (not shown). A pin 14 fixed to the cabinet is inserted into one end of the disc holder 11 so that the disc holder 11 is rotatable. Further, a pedestal 12 is arranged in the lower portion of the cabinet, and the disc holder 11 is rotated counterclockwise about the pin 14 so that the disc holder 11 abuts on the pedestal 12 as shown in FIG. , It has become stable and well supported.

The disc holder 11 is for loading a cartridge 18 containing a mini disc 16 into a mini disc drive device. For this reason, an entrance / exit 20 is provided on the front surface of the disc holder 11, from which the cartridge 18 is attached to / detached from the disc holder 11.

In this mini disk drive device, as shown in FIG. 4, the disk holder 11 is rotated upward, that is, clockwise with the pin 14 as the center, and the cartridge 18 is mounted inside from the entrance 20. As shown, the disc holder 11 is rotated downward, that is, counterclockwise and brought into contact with the gantry 12, and recording or reproducing is performed on the mini disc 16. At this time, when the cartridge 18 is mounted on the disc holder 11, the slide type shutters 22a and 22b provided on both sides of the cartridge 18 are opened, and the openings 23a and 23b are provided on both sides of the cartridge 18, Both the upper and lower surfaces of the mini disk 16 are exposed. Further, the ceiling plate 11a and the bottom plate 11b of the disc holder 11 are formed with openings 24a and 24b at positions overlapping the openings 23a and 23b, respectively. However, the opening 24a of the ceiling plate 11a of the disc holder 11 is formed wider rearward than the opening 23a of the upper surface of the cartridge 18.

At the lower part of the above-mentioned cabinet, a rotation support portion (not shown) for driving the mini disk 16 to rotate is arranged. A pickup support portion 28 that supports an optical head (pickup) 26 for recording / reproducing on / from the mini disk 16 is arranged in the lower portion of the cabinet. As described above, when the disc holder 11 having the cartridge 18 mounted thereon is rotated counterclockwise to approach the gantry 12, the rotation support portion engages with the clamping plate 16a of the mini disc 16, and The head 26 enters the lower openings 23b and 24b and faces the lower surface of the mini disk 16. The pickup support portion 28 is guided by guide bars 29a and 29b provided in the cabinet so as to be movable in the horizontal direction (vertical direction of the paper surface), whereby the optical head 26 follows the track of the mini disk 16. It is possible.

A bottom plate 30 a of a substantially L-shaped connecting plate 30 is screwed to the rear end of the pickup supporting portion 28. A ring-shaped protrusion 30c protrudes forward from the vertical plate 30b of the connecting plate 30. The holder 32 of the magnetic head 36 is pivotally attached to the protrusion 30c, and the rear end of the magnetic head support portion 34 is attached to the holder 32. The magnetic head support portion 34 is formed in the shape of a long rod, the center portion of which is slightly bent, and the front end portion faces downward. A magnetic head 36 is fixed to the front end of the magnetic head support portion 34. At the time of recording on or reproducing from the mini disk 16, as shown by the solid line in FIG. 5, the tip of the magnetic head supporting portion 34 enters the inside through the upper openings 23a, 24a, and the magnetic head 36 moves to the inside of the mini disk 16. Touch the upper board.

In this mini disk drive device, the optical head 26 irradiates the mini disk 16 with laser light and reads the reflected light to reproduce the information recorded on the mini disk 16. The laser light emitted from the optical head 26 heats a part of the mini disk 16 to activate the magnetic recording material coated thereon, and a magnetic field corresponding to the recorded information is applied to the part activated by the magnetic head 36. Then, the direction of the magnetic field of the magnetic recording material changes, and information is recorded by cooling and fixing the magnetic field.

For this purpose, the connecting plate 30 connects the holder 32, that is, the magnetic head 36 and the pickup support 28, that is, the optical head 26. That is, when the pickup support portion 28 that supports the optical head 26 moves vertically along the guide bars 29a and 29b to the paper surface, the holder 32 that supports the magnetic head 36 also moves in synchronization with this.

Now, an arcuate protrusion 32 b is formed on the rear portion of the holder 32. The protruding portion 32b is superposed on the protruding portion 30c of the connecting plate 30, and the shaft 38 is attached so as to penetrate the protruding portions 32b and 30c.

In this way, the holder 32 and the magnetic head support portion 34 are rotatable around the shaft 38, and the magnetic head 36 is vertically moved by this. As shown in FIG. 4, since the cartridge 18 is attached to and detached from the disc holder 11, when the disc holder 11 is rotated upward, that is, in the clockwise direction, a cam (not shown) is driven in synchronization with the rotation of the disc holder 11, and the holder 32 is clocked by the cam. The magnetic head 36 is lifted by being rotated in the direction. Then, as shown in FIG. 5, when the disc holder 11 is rotated downward, that is, counterclockwise, for recording or reproduction on the mini disc 16, the cam is driven in synchronization with this, and the holder 32 is rotated by this cam. Rotates counterclockwise and the magnetic head 36 descends.

Further, a counterclockwise biasing force is applied to the holder 32 by a spring (not shown). As a result, at the time of recording on or reproducing from the mini disk 16, the holder 32 is pressed against the ceiling plate 11a of the disk holder 11, and the magnetic head 36 comes into contact with the upper surface of the mini disk 16. The magnetic head support portion 34 has an appropriate elasticity, and when the magnetic head 36 contacts the mini disk 16, the magnetic head support portion 34 bends so that the magnetic head 36 is parallel to the mini disk 16. It comes in contact with this.

[0012]

[Problems to be solved by the device]

 By the way, in order to secure the recording accuracy on the mini disk 16, when the magnetic head 36 descends and comes into contact with the mini disk 16, the two become parallel to each other, and the magnetic head 36 is still a small pressure to the mini disk 16. Abutment on 16 is desirable. This is because the recording accuracy is deteriorated when the magnetic head 36 is tilted with respect to the mini disk 16, and when the magnetic head 36 and the mini disk 16 are separated at the time of recording, the magnetic head 36 acts between them. This is because the magnetic field is weakened and the recording accuracy deteriorates. On the other hand, when the magnetic head 36 strongly contacts the mini disk 16, the magnetic head 36 and the mini disk 16 are damaged.

Therefore, in addition to adjusting the mounting angle and the mounting position of the magnetic head 36 with respect to the magnetic head supporting portion 34 with high accuracy, the magnetic head supporting portion 34 must be designed in consideration of its shape and elasticity. I have to. Further, since the magnetic head 36 moves up and down and also moves laterally (perpendicular to the paper surface) together with the optical head 26, the dimensional accuracy and mounting accuracy of other components must be high. However, setting the shape and elasticity of the magnetic head supporting portion 34 with high accuracy and processing other parts with high accuracy in this manner takes time and labor, leading to an increase in cost.

Therefore, the present invention solves the above-mentioned problems, and can reduce the cost with a simple configuration, and moreover, a disk drive device capable of positioning the head with respect to the disk with high accuracy. The purpose is to provide.

[0015]

In order to solve the above-mentioned problems, in the present invention, an abutting portion capable of abutting on the cartridge is provided on the supporting portion of the write magnetic head of the disk housed in the cartridge. The magnetic head is positioned with respect to the disk by bringing the contact portion into contact with the cartridge.

[0016]

[Action]

 In the mini disk drive device shown in FIG. 1, with the magnetic head 36 raised, the disk holder 11 is rotated upward, that is, clockwise, around the pin 14, and the cartridge 18 is mounted on the disk holder 11. Then, as shown in FIG. 2, the disc holder 11 is rotated downward, that is, counterclockwise to be brought into contact with and supported by the pedestal 12, and then the magnetic head 36 is lowered to bring it into contact with the upper disc surface of the mini disc 16. Recording or reproduction on the mini disk 16 is performed.

A contact portion 50 is formed on the rod-shaped magnetic head support portion 34 that supports the magnetic head 36. When the magnetic head 36 is lowered, the contact portion 50 contacts the upper surface of the cartridge 18, whereby the position of the magnetic head 36 with respect to the mini disk 16 is accurately determined.

[0018]

【Example】

 An embodiment of a disk drive device according to the present invention will be described in detail below with reference to the drawings. In the following description, the same members as those described above are designated by the same reference numerals, and the description thereof will be omitted.

1 and 2 show the construction of a mini disk drive device according to the present invention. As shown in FIG. 1, this mini disc drive device rotates the disc holder 11 upward, that is, in the clockwise direction about the pin 14 in the same manner as the conventional mini disc drive device described above. As shown in FIG. 2, the cartridge 18 is mounted on the disc holder 11, and the disc holder 11 is rotated downward, that is, counterclockwise to be supported by the mount 12, and thereafter, recording or reproducing is performed on the mini disc 16. ing.

As shown in FIG. 3, arm portions 31 are formed on both sides of the upper end of the vertical plate 30b of the connecting plate 30, and arcuate protrusions 30c are formed forward from these arm portions 31, respectively. It is protruding. The holder 32 is arranged between the both protrusions 30c. Side plates 33a and 33b are formed upright on the left and right of the holder 32. The left side plate 33b has arcuate protrusions 32a and 32b formed at the front and rear ends thereof, and the right side plate 33a has a rear end also formed with an arcuate protrusion 32b.

The rear right protrusion 32 b is superposed on the protrusion 30 c of the connecting plate 30. The shaft 38 is attached so as to pass through the protrusions 32b and 30c, so that the holder 32 can rotate about the shaft 38. Further, washers 51 are attached to both ends of the shaft 38 to prevent the shaft 38 from coming off both projections 30c. A shaft 40 is provided on the left side of the front left protrusion 32a. The shaft 40 is provided at a height such that it can be placed on the upper surface of the cam 46, as will be described later.

A coil-shaped torsion spring 42 is disposed between the left protrusion 30 c and the protrusion 32 b, and the torsion spring 42 is wound around the rear shaft 38. A projecting portion 30d projects leftward from slightly below the upper end of the connecting plate 30, and a gap 44 is formed between the projecting portion 30d and the left arm portion 31. Then, one end 42a of the torsion spring 42 is inserted into the gap 44, and this is hooked on the protrusion 30d. The other end 42b of the torsion spring 42 is inserted into a hole 45 formed in the left side plate 33b. In this way, the holder 32 is biased in the counterclockwise direction by the torsion spring 42.

As described above, the holder 32 and the magnetic head support portion 34 are rotatable about the shaft 38, and thus the magnetic head 36 is vertically movable. Further, as shown in FIG. 2, during recording or reproduction on the mini disk 16, the holder 32 is pressed against the ceiling plate 11a of the disk holder 11 by the counterclockwise urging force of the torsion spring 42, and the magnetic head 36 is rotated. It contacts the upper surface of the disk 16.

Further, the torsion spring 42 not only applies the biasing force to the ceiling plate 11a to the holder 32 as described above, but also applies the biasing force to press the holder 32 rightward in FIG. That is, the torsion spring 42 is compressed and sandwiched between the left protrusions 30c and 32b. Therefore, the repulsive force of the torsion spring 42 acts along the axial direction of the shaft 38, the holder 32 is pressed to the right, and the right protrusions 30c and 32b come into close contact with each other, and the holder 32 is positionally regulated here. Has been done. For this reason, the lateral displacement of the magnetic head 36 and the optical head 26 and the relative rattling are prevented.

A cam 46 for rotating the holder 32 and the magnetic head support portion 34 is mounted on the ceiling plate 11a of the disc holder 11 so as to be slidable in the front-rear direction as shown in FIG. As shown in FIG. 3, a rounded convex portion 48 is formed on the lower surface of the front and rear ends of the cam 46, which allows the cam 46 to slide easily. A protrusion 47 is formed so as to project upward in the center of the cam 46, and a flat surface 46 a is formed on the upper portion of the protrusion 47. An inclined surface 46b is formed behind the flat surface 46a, and connects the flat surface 46a and the flat surface 46c at the upper portion of the cam body.

When the cam 46 is retracted from the state shown in FIG. 2, the shaft 40 arranged above the lower plane 46c slides on the inclined surface 46b and is placed on the upper plane 46a. As a result, the holder 32, to which the shaft 40 is attached, rotates clockwise against the urging force of the torsion spring 42, so that the magnetic head 36 rises away from the mini disk 16 and comes out of the disk holder 11. Then, when the cam 46 is moved forward, the shaft 40 resting on the upper plane 46a slides down the inclined surface 46b and rests on the lower plane 46c. As a result, the holder 32 to which the shaft 40 is attached rotates counterclockwise, so that the magnetic head 36 enters the disk holder 11 through the openings 23a and 24a and contacts the mini disk 16.

Since the cartridge 18 is attached to and detached from the disc holder 11 as shown in FIG. 1, when the disc holder 11 is rotated upward, that is, in the clockwise direction, the drive mechanism of the cam 46 (not shown) is synchronized with this. ) Works. Then, the cam 46 retracts, the holder 32 rotates clockwise, and the magnetic head 36 rises. Further, as shown in FIG. 2, when recording or reproducing to / from the mini disk 16, when the disk holder 11 is rotated downward, that is, counterclockwise, the drive mechanism operates in synchronization with this and the cam 46 advances. Then, the holder 32 rotates counterclockwise and the magnetic head 36 descends. In this way, the holder 32 is pressed against the ceiling plate 11a of the disk holder 11 by the counterclockwise biasing force of the torsion spring 42, and the magnetic head 36 contacts the disk surface above the mini disk 16.

Now, as shown in FIG. 3, a contact portion 50 is formed on the right side of the front end portion 34 a of the magnetic head support portion 34. The abutting portion 50 is formed in an L shape by a horizontal portion 50a protruding rightward from the front end portion 34a and a lower portion 50b bent from the horizontal portion 50a and extending downward. The lower surface of the lower portion 50 has rounded corners so as not to damage the cartridge 18. As shown in FIG. 2, when the magnetic head 36 descends and comes into contact with the mini disk 16, the abutting portion 50 enters the opening 24a of the disk holder 11, and the lower end of the lower portion 50b abuts the upper surface of the cartridge 18. . Therefore, the opening 24a is formed to be wider behind the opening 23a of the cartridge 18.

Since the positional relationship between the cartridge 18 and the mini disk 16 is maintained almost accurately, if the magnetic head 36 is positioned with respect to the cartridge 18, the position of the magnetic head 36 with respect to the mini disk 16 is also substantially unique. Decided. This positional relationship does not change even if the magnetic head 36 moves laterally (perpendicular to the paper surface).

That is, in this embodiment, even if the elasticity and shape of the magnetic head support portion 34 are not so accurate, the difference between the height of the lower end of the lower portion 50b of the contact portion 50 and the height of the lower end of the magnetic head 36 is different. If the magnetic head 36 contacts the upper disk surface of the mini disk 16 accurately, the pressure at which the magnetic head 36 contacts the mini disk 16 can be set to a predetermined value. Further, it is not necessary to increase the accuracy of other parts for moving the magnetic head 36 laterally or vertically. Therefore, it is possible to reduce the manufacturing cost of the mini disk drive device.

Although the magnetic head 36 contacts the mini disk 16 in the above-mentioned embodiment, the present invention is not limited to this, and the magnetic head 36 and the mini disk 16 can be accurately connected to each other. It is also applicable when making a space.

Further, in the above-described embodiment, when the disc holder 11 is rotated downward, that is, counterclockwise, the cam 46 moves forward and the magnetic head 36 descends accordingly, so that the mini disc 16 is reproduced. However, although the magnetic head 36 comes into contact with the mini disk 16, the magnetic head 36 may be lowered only when recording on the mini disk 16.

Further, the above-mentioned embodiment is a mini disk drive device of the type in which the disk holder 11 is rotated to load the cartridge 18, but the present invention is, for example, front loading such that the disk holder moves in parallel. It is also applicable to other loading type mini disk drive devices.

[0034]

[Effect of device]

 As described above, in the disk drive device of the present invention, the contact part that can contact the cartridge is provided in the support part of the magnetic write head of the disk housed in the cartridge, and the contact part contacts the cartridge. By doing so, the magnetic head is positioned with respect to the disk.

Therefore, according to the present invention, the position of the magnetic head with respect to the disk can be accurately determined without strictly setting the elasticity and shape of the components that support the magnetic head or increasing the dimensional accuracy of these components so much. Can be set to. Therefore, there is an effect that the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side sectional view of a mini disk drive device according to the present invention when a mini disk 16 is attached and detached.

[Fig. 2] Mini disc 1 of the mini disc drive device
6 is a side sectional view of the recording and reproducing apparatus of FIG.

FIG. 3 is a magnetic head 36 of the mini disk drive device.
It is a perspective view which shows the mechanism which moves up and down.

FIG. 4 is a side sectional view of the conventional mini disk drive device when the mini disk 16 is attached and detached.

FIG. 5: Mini disc 1 of the mini disc drive device
6 is a side sectional view of the recording and reproducing apparatus of FIG.

[Explanation of symbols]

 11 Disk Holder 12 Frame 16 Mini Disk 18 Cartridge 34 Magnetic Head Support 36 Magnetic Head 50 Abutment

Claims (1)

[Scope of utility model registration request] 1. An abutting portion capable of abutting on the cartridge is provided on a supporting portion of a write magnetic head of a disk housed in the cartridge, and the abutting portion is abutted on the cartridge, thereby to the disk. A disk drive device characterized in that the magnetic head is positioned.